From a63d0120a2dd89eabf24b415b27208e190e989b0 Mon Sep 17 00:00:00 2001
From: Lucas Stach <l.stach@pengutronix.de>
Date: Sun, 7 Mar 2021 21:10:57 -0800
Subject: Input: exc3000 - split MT event handling from IRQ handler

Split out the multitouch event handling into its own function to allow other
events to be handled in the IRQ handler without disturbing the MT handling.
Now that things are separated a bit more, stop treating vendor data requests
special by cehcking for a locked mutex, but just look at the event ID to
figure out if the message is a MT report or a vendor data query reply.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Link: https://lore.kernel.org/r/20210125182527.1225245-2-l.stach@pengutronix.de
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/exc3000.c | 114 +++++++++++++++++++-----------------
 1 file changed, 61 insertions(+), 53 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/exc3000.c b/drivers/input/touchscreen/exc3000.c
index a6597f026980..398b56a3900a 100644
--- a/drivers/input/touchscreen/exc3000.c
+++ b/drivers/input/touchscreen/exc3000.c
@@ -30,6 +30,7 @@
 #define EXC3000_LEN_MODEL_NAME		16
 #define EXC3000_LEN_FW_VERSION		16
 
+#define EXC3000_VENDOR_EVENT		0x03
 #define EXC3000_MT1_EVENT		0x06
 #define EXC3000_MT2_EVENT		0x18
 
@@ -105,15 +106,16 @@ static void exc3000_timer(struct timer_list *t)
 	input_sync(data->input);
 }
 
+static inline void exc3000_schedule_timer(struct exc3000_data *data)
+{
+	mod_timer(&data->timer, jiffies + msecs_to_jiffies(EXC3000_TIMEOUT_MS));
+}
+
 static int exc3000_read_frame(struct exc3000_data *data, u8 *buf)
 {
 	struct i2c_client *client = data->client;
-	u8 expected_event = EXC3000_MT1_EVENT;
 	int ret;
 
-	if (data->info->max_xy == SZ_16K - 1)
-		expected_event = EXC3000_MT2_EVENT;
-
 	ret = i2c_master_send(client, "'", 2);
 	if (ret < 0)
 		return ret;
@@ -131,47 +133,62 @@ static int exc3000_read_frame(struct exc3000_data *data, u8 *buf)
 	if (get_unaligned_le16(buf) != EXC3000_LEN_FRAME)
 		return -EINVAL;
 
-	if (buf[2] != expected_event)
-		return -EINVAL;
-
 	return 0;
 }
 
-static int exc3000_read_data(struct exc3000_data *data,
-			     u8 *buf, int *n_slots)
+static int exc3000_handle_mt_event(struct exc3000_data *data)
 {
-	int error;
-
-	error = exc3000_read_frame(data, buf);
-	if (error)
-		return error;
+	struct input_dev *input = data->input;
+	int ret, total_slots;
+	u8 *buf = data->buf;
 
-	*n_slots = buf[3];
-	if (!*n_slots || *n_slots > EXC3000_NUM_SLOTS)
-		return -EINVAL;
+	total_slots = buf[3];
+	if (!total_slots || total_slots > EXC3000_NUM_SLOTS) {
+		ret = -EINVAL;
+		goto out_fail;
+	}
 
-	if (*n_slots > EXC3000_SLOTS_PER_FRAME) {
+	if (total_slots > EXC3000_SLOTS_PER_FRAME) {
 		/* Read 2nd frame to get the rest of the contacts. */
-		error = exc3000_read_frame(data, buf + EXC3000_LEN_FRAME);
-		if (error)
-			return error;
+		ret = exc3000_read_frame(data, buf + EXC3000_LEN_FRAME);
+		if (ret)
+			goto out_fail;
 
 		/* 2nd chunk must have number of contacts set to 0. */
-		if (buf[EXC3000_LEN_FRAME + 3] != 0)
-			return -EINVAL;
+		if (buf[EXC3000_LEN_FRAME + 3] != 0) {
+			ret = -EINVAL;
+			goto out_fail;
+		}
 	}
 
+	/*
+	 * We read full state successfully, no contacts will be "stuck".
+	 */
+	del_timer_sync(&data->timer);
+
+	while (total_slots > 0) {
+		int slots = min(total_slots, EXC3000_SLOTS_PER_FRAME);
+
+		exc3000_report_slots(input, &data->prop, buf + 4, slots);
+		total_slots -= slots;
+		buf += EXC3000_LEN_FRAME;
+	}
+
+	input_mt_sync_frame(input);
+	input_sync(input);
+
 	return 0;
+
+out_fail:
+	/* Schedule a timer to release "stuck" contacts */
+	exc3000_schedule_timer(data);
+
+	return ret;
 }
 
 static int exc3000_query_interrupt(struct exc3000_data *data)
 {
 	u8 *buf = data->buf;
-	int error;
-
-	error = i2c_master_recv(data->client, buf, EXC3000_LEN_FRAME);
-	if (error < 0)
-		return error;
 
 	if (buf[0] != 'B')
 		return -EPROTO;
@@ -189,39 +206,30 @@ static int exc3000_query_interrupt(struct exc3000_data *data)
 static irqreturn_t exc3000_interrupt(int irq, void *dev_id)
 {
 	struct exc3000_data *data = dev_id;
-	struct input_dev *input = data->input;
 	u8 *buf = data->buf;
-	int slots, total_slots;
-	int error;
-
-	if (mutex_is_locked(&data->query_lock)) {
-		data->query_result = exc3000_query_interrupt(data);
-		complete(&data->wait_event);
-		goto out;
-	}
+	int ret;
 
-	error = exc3000_read_data(data, buf, &total_slots);
-	if (error) {
+	ret = exc3000_read_frame(data, buf);
+	if (ret) {
 		/* Schedule a timer to release "stuck" contacts */
-		mod_timer(&data->timer,
-			  jiffies + msecs_to_jiffies(EXC3000_TIMEOUT_MS));
+		exc3000_schedule_timer(data);
 		goto out;
 	}
 
-	/*
-	 * We read full state successfully, no contacts will be "stuck".
-	 */
-	del_timer_sync(&data->timer);
+	switch (buf[2]) {
+	case EXC3000_VENDOR_EVENT:
+		data->query_result = exc3000_query_interrupt(data);
+		complete(&data->wait_event);
+		break;
 
-	while (total_slots > 0) {
-		slots = min(total_slots, EXC3000_SLOTS_PER_FRAME);
-		exc3000_report_slots(input, &data->prop, buf + 4, slots);
-		total_slots -= slots;
-		buf += EXC3000_LEN_FRAME;
-	}
+	case EXC3000_MT1_EVENT:
+	case EXC3000_MT2_EVENT:
+		exc3000_handle_mt_event(data);
+		break;
 
-	input_mt_sync_frame(input);
-	input_sync(input);
+	default:
+		break;
+	}
 
 out:
 	return IRQ_HANDLED;
-- 
cgit v1.2.3


From 102feb1ddfd00d0c6115ae3372058012dc16418c Mon Sep 17 00:00:00 2001
From: Lucas Stach <l.stach@pengutronix.de>
Date: Sun, 7 Mar 2021 21:35:54 -0800
Subject: Input: exc3000 - factor out vendor data request

Factor out the vendor data i2c request handling to make it reusable
for other functions. Also don't cache the model and firmware version
string in the device private data as we never use the cached version,
but always read from the device.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Link: https://lore.kernel.org/r/20210125182527.1225245-3-l.stach@pengutronix.de
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/exc3000.c | 122 ++++++++++++++++--------------------
 1 file changed, 54 insertions(+), 68 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/exc3000.c b/drivers/input/touchscreen/exc3000.c
index 398b56a3900a..e55fb79c7fde 100644
--- a/drivers/input/touchscreen/exc3000.c
+++ b/drivers/input/touchscreen/exc3000.c
@@ -25,6 +25,7 @@
 #define EXC3000_NUM_SLOTS		10
 #define EXC3000_SLOTS_PER_FRAME		5
 #define EXC3000_LEN_FRAME		66
+#define EXC3000_LEN_VENDOR_REQUEST	68
 #define EXC3000_LEN_POINT		10
 
 #define EXC3000_LEN_MODEL_NAME		16
@@ -77,9 +78,6 @@ struct exc3000_data {
 	u8 buf[2 * EXC3000_LEN_FRAME];
 	struct completion wait_event;
 	struct mutex query_lock;
-	int query_result;
-	char model[EXC3000_LEN_MODEL_NAME];
-	char fw_version[EXC3000_LEN_FW_VERSION];
 };
 
 static void exc3000_report_slots(struct input_dev *input,
@@ -186,23 +184,6 @@ out_fail:
 	return ret;
 }
 
-static int exc3000_query_interrupt(struct exc3000_data *data)
-{
-	u8 *buf = data->buf;
-
-	if (buf[0] != 'B')
-		return -EPROTO;
-
-	if (buf[4] == 'E')
-		strlcpy(data->model, buf + 5, sizeof(data->model));
-	else if (buf[4] == 'D')
-		strlcpy(data->fw_version, buf + 5, sizeof(data->fw_version));
-	else
-		return -EPROTO;
-
-	return 0;
-}
-
 static irqreturn_t exc3000_interrupt(int irq, void *dev_id)
 {
 	struct exc3000_data *data = dev_id;
@@ -218,7 +199,6 @@ static irqreturn_t exc3000_interrupt(int irq, void *dev_id)
 
 	switch (buf[2]) {
 	case EXC3000_VENDOR_EVENT:
-		data->query_result = exc3000_query_interrupt(data);
 		complete(&data->wait_event);
 		break;
 
@@ -235,73 +215,75 @@ out:
 	return IRQ_HANDLED;
 }
 
-static ssize_t fw_version_show(struct device *dev,
-			       struct device_attribute *attr, char *buf)
+static int exc3000_vendor_data_request(struct exc3000_data *data, u8 *request,
+				       u8 request_len, u8 *response, int timeout)
 {
-	struct i2c_client *client = to_i2c_client(dev);
-	struct exc3000_data *data = i2c_get_clientdata(client);
-	static const u8 request[68] = {
-		0x67, 0x00, 0x42, 0x00, 0x03, 0x01, 'D', 0x00
-	};
-	int error;
+	u8 buf[EXC3000_LEN_VENDOR_REQUEST] = { 0x67, 0x00, 0x42, 0x00, 0x03 };
+	int ret;
 
 	mutex_lock(&data->query_lock);
 
-	data->query_result = -ETIMEDOUT;
 	reinit_completion(&data->wait_event);
 
-	error = i2c_master_send(client, request, sizeof(request));
-	if (error < 0) {
-		mutex_unlock(&data->query_lock);
-		return error;
+	buf[5] = request_len;
+	memcpy(&buf[6], request, request_len);
+
+	ret = i2c_master_send(data->client, buf, EXC3000_LEN_VENDOR_REQUEST);
+	if (ret < 0)
+		goto out_unlock;
+
+	if (response) {
+		ret = wait_for_completion_timeout(&data->wait_event,
+						  timeout * HZ);
+		if (ret <= 0) {
+			ret = -ETIMEDOUT;
+			goto out_unlock;
+		}
+
+		if (data->buf[3] >= EXC3000_LEN_FRAME) {
+			ret = -ENOSPC;
+			goto out_unlock;
+		}
+
+		memcpy(response, &data->buf[4], data->buf[3]);
+		ret = data->buf[3];
 	}
 
-	wait_for_completion_interruptible_timeout(&data->wait_event, 1 * HZ);
+out_unlock:
 	mutex_unlock(&data->query_lock);
 
-	if (data->query_result < 0)
-		return data->query_result;
-
-	return sprintf(buf, "%s\n", data->fw_version);
+	return ret;
 }
-static DEVICE_ATTR_RO(fw_version);
 
-static ssize_t exc3000_get_model(struct exc3000_data *data)
+static ssize_t fw_version_show(struct device *dev,
+			       struct device_attribute *attr, char *buf)
 {
-	static const u8 request[68] = {
-		0x67, 0x00, 0x42, 0x00, 0x03, 0x01, 'E', 0x00
-	};
-	struct i2c_client *client = data->client;
-	int error;
-
-	mutex_lock(&data->query_lock);
-	data->query_result = -ETIMEDOUT;
-	reinit_completion(&data->wait_event);
-
-	error = i2c_master_send(client, request, sizeof(request));
-	if (error < 0) {
-		mutex_unlock(&data->query_lock);
-		return error;
-	}
+	struct i2c_client *client = to_i2c_client(dev);
+	struct exc3000_data *data = i2c_get_clientdata(client);
+	u8 response[EXC3000_LEN_FRAME];
+	int ret;
 
-	wait_for_completion_interruptible_timeout(&data->wait_event, 1 * HZ);
-	mutex_unlock(&data->query_lock);
+	ret = exc3000_vendor_data_request(data, (u8[]){'D'}, 1, response, 1);
+	if (ret < 0)
+		return ret;
 
-	return data->query_result;
+	return sprintf(buf, "%s\n", &response[1]);
 }
+static DEVICE_ATTR_RO(fw_version);
 
 static ssize_t model_show(struct device *dev,
 			  struct device_attribute *attr, char *buf)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	struct exc3000_data *data = i2c_get_clientdata(client);
-	int error;
+	u8 response[EXC3000_LEN_FRAME];
+	int ret;
 
-	error = exc3000_get_model(data);
-	if (error < 0)
-		return error;
+	ret = exc3000_vendor_data_request(data, (u8[]){'E'}, 1, response, 1);
+	if (ret < 0)
+		return ret;
 
-	return sprintf(buf, "%s\n", data->model);
+	return sprintf(buf, "%s\n", &response[1]);
 }
 static DEVICE_ATTR_RO(model);
 
@@ -387,9 +369,15 @@ static int exc3000_probe(struct i2c_client *client)
 	 * or two touch events anyways).
 	 */
 	for (retry = 0; retry < 3; retry++) {
-		error = exc3000_get_model(data);
-		if (!error)
+		u8 response[EXC3000_LEN_FRAME];
+
+		error = exc3000_vendor_data_request(data, (u8[]){'E'}, 1,
+						    response, 1);
+		if (error > 0) {
+			dev_dbg(&client->dev, "TS Model: %s", &response[1]);
+			error = 0;
 			break;
+		}
 		dev_warn(&client->dev, "Retry %d get EETI EXC3000 model: %d\n",
 			 retry + 1, error);
 	}
@@ -397,8 +385,6 @@ static int exc3000_probe(struct i2c_client *client)
 	if (error)
 		return error;
 
-	dev_dbg(&client->dev, "TS Model: %s", data->model);
-
 	i2c_set_clientdata(client, data);
 
 	error = devm_device_add_group(&client->dev, &exc3000_attribute_group);
-- 
cgit v1.2.3


From c929ac9eb85acf9217eb812369bbd4cf65a772e0 Mon Sep 17 00:00:00 2001
From: Lucas Stach <l.stach@pengutronix.de>
Date: Sun, 7 Mar 2021 21:40:01 -0800
Subject: Input: exc3000 - fix firmware version query for device in bootloader

If the device is stuck in bootloader (maybe due to blank or corrupted
application firmware) it won't answer a query for the firmware version.
Fall back to returning the bootloader version in that case.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Link: https://lore.kernel.org/r/20210125182527.1225245-4-l.stach@pengutronix.de
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/exc3000.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/exc3000.c b/drivers/input/touchscreen/exc3000.c
index e55fb79c7fde..66682a0c37d7 100644
--- a/drivers/input/touchscreen/exc3000.c
+++ b/drivers/input/touchscreen/exc3000.c
@@ -263,6 +263,20 @@ static ssize_t fw_version_show(struct device *dev,
 	u8 response[EXC3000_LEN_FRAME];
 	int ret;
 
+	/* query bootloader info */
+	ret = exc3000_vendor_data_request(data,
+					  (u8[]){0x39, 0x02}, 2, response, 1);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * If the bootloader version is non-zero then the device is in
+	 * bootloader mode and won't answer a query for the application FW
+	 * version, so we just use the bootloader version info.
+	 */
+	if (response[2] || response[3])
+		return sprintf(buf, "%d.%d\n", response[2], response[3]);
+
 	ret = exc3000_vendor_data_request(data, (u8[]){'D'}, 1, response, 1);
 	if (ret < 0)
 		return ret;
-- 
cgit v1.2.3


From ad117c558e838f9fa93af265d8f9dd54e87e15b1 Mon Sep 17 00:00:00 2001
From: Lucas Stach <l.stach@pengutronix.de>
Date: Sun, 7 Mar 2021 21:40:37 -0800
Subject: Input: exc3000 - add type sysfs attribute

Add a sysfs attribute to query the type of the touchscreen device.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Link: https://lore.kernel.org/r/20210125182527.1225245-5-l.stach@pengutronix.de
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 Documentation/ABI/testing/sysfs-driver-input-exc3000 |  9 +++++++++
 drivers/input/touchscreen/exc3000.c                  | 17 +++++++++++++++++
 2 files changed, 26 insertions(+)

(limited to 'drivers')

diff --git a/Documentation/ABI/testing/sysfs-driver-input-exc3000 b/Documentation/ABI/testing/sysfs-driver-input-exc3000
index cd7c578aef2c..704434b277b0 100644
--- a/Documentation/ABI/testing/sysfs-driver-input-exc3000
+++ b/Documentation/ABI/testing/sysfs-driver-input-exc3000
@@ -15,3 +15,12 @@ Description:    Reports the model identification provided by the touchscreen, fo
 		Access: Read
 
 		Valid values: Represented as string
+
+What:		/sys/bus/i2c/devices/xxx/type
+Date:		Jan 2021
+Contact:	linux-input@vger.kernel.org
+Description:	Reports the type identification provided by the touchscreen, for example "PCAP82H80 Series"
+
+		Access: Read
+
+		Valid values: Represented as string
diff --git a/drivers/input/touchscreen/exc3000.c b/drivers/input/touchscreen/exc3000.c
index 66682a0c37d7..cbe0dd412912 100644
--- a/drivers/input/touchscreen/exc3000.c
+++ b/drivers/input/touchscreen/exc3000.c
@@ -301,9 +301,26 @@ static ssize_t model_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(model);
 
+static ssize_t type_show(struct device *dev,
+			  struct device_attribute *attr, char *buf)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct exc3000_data *data = i2c_get_clientdata(client);
+	u8 response[EXC3000_LEN_FRAME];
+	int ret;
+
+	ret = exc3000_vendor_data_request(data, (u8[]){'F'}, 1, response, 1);
+	if (ret < 0)
+		return ret;
+
+	return sprintf(buf, "%s\n", &response[1]);
+}
+static DEVICE_ATTR_RO(type);
+
 static struct attribute *sysfs_attrs[] = {
 	&dev_attr_fw_version.attr,
 	&dev_attr_model.attr,
+	&dev_attr_type.attr,
 	NULL
 };
 
-- 
cgit v1.2.3


From e41d237818598c0b17458b4d0416b091a7959e55 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 27 Dec 2020 16:59:56 -0500
Subject: qib_fs: switch to simple_recursive_removal()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 drivers/infiniband/hw/qib/qib_fs.c | 68 +++-----------------------------------
 1 file changed, 5 insertions(+), 63 deletions(-)

(limited to 'drivers')

diff --git a/drivers/infiniband/hw/qib/qib_fs.c b/drivers/infiniband/hw/qib/qib_fs.c
index e336d778e076..a0c5f3bdc324 100644
--- a/drivers/infiniband/hw/qib/qib_fs.c
+++ b/drivers/infiniband/hw/qib/qib_fs.c
@@ -427,79 +427,21 @@ bail:
 	return ret;
 }
 
-static int remove_file(struct dentry *parent, char *name)
-{
-	struct dentry *tmp;
-	int ret;
-
-	tmp = lookup_one_len(name, parent, strlen(name));
-
-	if (IS_ERR(tmp)) {
-		ret = PTR_ERR(tmp);
-		goto bail;
-	}
-
-	spin_lock(&tmp->d_lock);
-	if (simple_positive(tmp)) {
-		__d_drop(tmp);
-		spin_unlock(&tmp->d_lock);
-		simple_unlink(d_inode(parent), tmp);
-	} else {
-		spin_unlock(&tmp->d_lock);
-	}
-	dput(tmp);
-
-	ret = 0;
-bail:
-	/*
-	 * We don't expect clients to care about the return value, but
-	 * it's there if they need it.
-	 */
-	return ret;
-}
-
 static int remove_device_files(struct super_block *sb,
 			       struct qib_devdata *dd)
 {
-	struct dentry *dir, *root;
+	struct dentry *dir;
 	char unit[10];
-	int ret, i;
 
-	root = dget(sb->s_root);
-	inode_lock(d_inode(root));
 	snprintf(unit, sizeof(unit), "%u", dd->unit);
-	dir = lookup_one_len(unit, root, strlen(unit));
+	dir = lookup_one_len_unlocked(unit, sb->s_root, strlen(unit));
 
 	if (IS_ERR(dir)) {
-		ret = PTR_ERR(dir);
 		pr_err("Lookup of %s failed\n", unit);
-		goto bail;
+		return PTR_ERR(dir);
 	}
-
-	inode_lock(d_inode(dir));
-	remove_file(dir, "counters");
-	remove_file(dir, "counter_names");
-	remove_file(dir, "portcounter_names");
-	for (i = 0; i < dd->num_pports; i++) {
-		char fname[24];
-
-		sprintf(fname, "port%dcounters", i + 1);
-		remove_file(dir, fname);
-		if (dd->flags & QIB_HAS_QSFP) {
-			sprintf(fname, "qsfp%d", i + 1);
-			remove_file(dir, fname);
-		}
-	}
-	remove_file(dir, "flash");
-	inode_unlock(d_inode(dir));
-	ret = simple_rmdir(d_inode(root), dir);
-	d_drop(dir);
-	dput(dir);
-
-bail:
-	inode_unlock(d_inode(root));
-	dput(root);
-	return ret;
+	simple_recursive_removal(dir, NULL);
+	return 0;
 }
 
 /*
-- 
cgit v1.2.3


From 145e1da374bcba14c9ca069646f68b76c422612a Mon Sep 17 00:00:00 2001
From: Raghavendra Rao Ananta <rananta@codeaurora.org>
Date: Wed, 3 Mar 2021 13:47:02 -0800
Subject: remoteproc: sysfs: Use sysfs_emit instead of sprintf

For security reasons sysfs_emit() is preferred over sprintf().
Hence, convert the remoteproc's sysfs show functions accordingly.

Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>
Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>
Link: https://lore.kernel.org/r/1614808022-26062-1-git-send-email-sidgup@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_sysfs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
index 1dbef895e65e..6840dad931d5 100644
--- a/drivers/remoteproc/remoteproc_sysfs.c
+++ b/drivers/remoteproc/remoteproc_sysfs.c
@@ -15,7 +15,7 @@ static ssize_t recovery_show(struct device *dev,
 {
 	struct rproc *rproc = to_rproc(dev);
 
-	return sprintf(buf, "%s", rproc->recovery_disabled ? "disabled\n" : "enabled\n");
+	return sysfs_emit(buf, "%s", rproc->recovery_disabled ? "disabled\n" : "enabled\n");
 }
 
 /*
@@ -82,7 +82,7 @@ static ssize_t coredump_show(struct device *dev,
 {
 	struct rproc *rproc = to_rproc(dev);
 
-	return sprintf(buf, "%s\n", rproc_coredump_str[rproc->dump_conf]);
+	return sysfs_emit(buf, "%s\n", rproc_coredump_str[rproc->dump_conf]);
 }
 
 /*
-- 
cgit v1.2.3


From 34731ed13e8a8ca95fa0dca466537396b5f2d1af Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Mon, 8 Mar 2021 16:30:46 +0100
Subject: leds: lgm: fix gpiolib dependency

Without gpiolib, the driver fails to build:

    drivers/leds/blink/leds-lgm-sso.c:123:19: error: field has incomplete type 'struct gpio_chip'
            struct gpio_chip chip;
                             ^
    include/linux/gpio.h:107:8: note: forward declaration of 'struct gpio_chip'
    struct gpio_chip;
           ^
    drivers/leds/blink/leds-lgm-sso.c:263:3: error: implicit declaration of function 'gpiod_set_value' [-Werror,-Wimplicit-function-declaration]
                    gpiod_set_value(led->gpiod, val);
                    ^
    drivers/leds/blink/leds-lgm-sso.c:263:3: note: did you mean 'gpio_set_value'?
    include/linux/gpio.h:168:20: note: 'gpio_set_value' declared here
    static inline void gpio_set_value(unsigned gpio, int value)
                       ^
    drivers/leds/blink/leds-lgm-sso.c:345:3: error: implicit declaration of function 'gpiod_set_value' [-Werror,-Wimplicit-function-declaration]
                    gpiod_set_value(led->gpiod, 1);
                    ^

Add the dependency in Kconfig.

Fixes: c3987cd2bca3 ("leds: lgm: Add LED controller driver for LGM SoC")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
---
 drivers/leds/blink/Kconfig | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/leds/blink/Kconfig b/drivers/leds/blink/Kconfig
index 265b53476a80..6dedc58c47b3 100644
--- a/drivers/leds/blink/Kconfig
+++ b/drivers/leds/blink/Kconfig
@@ -9,6 +9,7 @@ if LEDS_BLINK
 
 config LEDS_BLINK_LGM
 	tristate "LED support for Intel LGM SoC series"
+	depends on GPIOLIB
 	depends on LEDS_CLASS
 	depends on MFD_SYSCON
 	depends on OF
-- 
cgit v1.2.3


From 436cb709f8a9fd1a52e00e830e715c63191c2e63 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Wed, 24 Feb 2021 15:13:49 +0000
Subject: i3c: master: svc: remove redundant assignment to cmd->read_len

The assignment of xfer_len to cmd->read_len appears to be redundant
as the next statement re-assigns the value 0 to it.  Clean up the
code by removing the redundant first assignment.

Addresses-Coverity: ("Unused value")
Fixes: dd3c52846d59 ("i3c: master: svc: Add Silvaco I3C master driver")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210224151349.202332-1-colin.king@canonical.com
---
 drivers/i3c/master/svc-i3c-master.c | 1 -
 1 file changed, 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index 8d990696676e..1f6ba4221817 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -1124,7 +1124,6 @@ static int svc_i3c_master_send_direct_ccc_cmd(struct svc_i3c_master *master,
 	cmd->in = NULL;
 	cmd->out = &ccc->id;
 	cmd->len = 1;
-	cmd->read_len = xfer_len;
 	cmd->read_len = 0;
 	cmd->continued = true;
 
-- 
cgit v1.2.3


From ea16ef967ec88bd67466d564d461c3fdf7f85bd9 Mon Sep 17 00:00:00 2001
From: Jingle Wu <jingle.wu@emc.com.tw>
Date: Sun, 7 Mar 2021 18:23:25 -0800
Subject: Input: elan_i2c - reduce the resume time for new devices

Newer controllers, such as Voxel, Delbin, Magple, Bobba and others, do not
need to be reset after issuing power-on command, and skipping reset saves
at least 100ms from resume time.

Note that if first attempt of re-initializing device fails we will not be
skipping reset on the subsequent ones.

Signed-off-by: Jingle Wu <jingle.wu@emc.com.tw>
Link: https://lore.kernel.org/r/20210226073537.4926-1-jingle.wu@emc.com.tw
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/mouse/elan_i2c.h      |  5 ++++
 drivers/input/mouse/elan_i2c_core.c | 58 ++++++++++++++++++++++++++++++-------
 2 files changed, 53 insertions(+), 10 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/mouse/elan_i2c.h b/drivers/input/mouse/elan_i2c.h
index e12da5b024b0..838b3b346316 100644
--- a/drivers/input/mouse/elan_i2c.h
+++ b/drivers/input/mouse/elan_i2c.h
@@ -55,6 +55,11 @@
 #define ETP_FW_PAGE_SIZE_512	512
 #define ETP_FW_SIGNATURE_SIZE	6
 
+#define ETP_PRODUCT_ID_DELBIN	0x00C2
+#define ETP_PRODUCT_ID_VOXEL	0x00BF
+#define ETP_PRODUCT_ID_MAGPIE	0x0120
+#define ETP_PRODUCT_ID_BOBBA	0x0121
+
 struct i2c_client;
 struct completion;
 
diff --git a/drivers/input/mouse/elan_i2c_core.c b/drivers/input/mouse/elan_i2c_core.c
index bef73822315d..dad22c1ea6a0 100644
--- a/drivers/input/mouse/elan_i2c_core.c
+++ b/drivers/input/mouse/elan_i2c_core.c
@@ -46,6 +46,9 @@
 #define ETP_FINGER_WIDTH	15
 #define ETP_RETRY_COUNT		3
 
+/* quirks to control the device */
+#define ETP_QUIRK_QUICK_WAKEUP	BIT(0)
+
 /* The main device structure */
 struct elan_tp_data {
 	struct i2c_client	*client;
@@ -90,8 +93,38 @@ struct elan_tp_data {
 	bool			baseline_ready;
 	u8			clickpad;
 	bool			middle_button;
+
+	u32			quirks;		/* Various quirks */
 };
 
+static u32 elan_i2c_lookup_quirks(u16 ic_type, u16 product_id)
+{
+	static const struct {
+		u16 ic_type;
+		u16 product_id;
+		u32 quirks;
+	} elan_i2c_quirks[] = {
+		{ 0x0D, ETP_PRODUCT_ID_DELBIN, ETP_QUIRK_QUICK_WAKEUP },
+		{ 0x10, ETP_PRODUCT_ID_VOXEL, ETP_QUIRK_QUICK_WAKEUP },
+		{ 0x14, ETP_PRODUCT_ID_MAGPIE, ETP_QUIRK_QUICK_WAKEUP },
+		{ 0x14, ETP_PRODUCT_ID_BOBBA, ETP_QUIRK_QUICK_WAKEUP },
+	};
+	u32 quirks = 0;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(elan_i2c_quirks); i++) {
+		if (elan_i2c_quirks[i].ic_type == ic_type &&
+		    elan_i2c_quirks[i].product_id == product_id) {
+			quirks = elan_i2c_quirks[i].quirks;
+		}
+	}
+
+	if (ic_type >= 0x0D && product_id >= 0x123)
+		quirks |= ETP_QUIRK_QUICK_WAKEUP;
+
+	return quirks;
+}
+
 static int elan_get_fwinfo(u16 ic_type, u8 iap_version, u16 *validpage_count,
 			   u32 *signature_address, u16 *page_size)
 {
@@ -258,16 +291,18 @@ static int elan_check_ASUS_special_fw(struct elan_tp_data *data)
 	return false;
 }
 
-static int __elan_initialize(struct elan_tp_data *data)
+static int __elan_initialize(struct elan_tp_data *data, bool skip_reset)
 {
 	struct i2c_client *client = data->client;
 	bool woken_up = false;
 	int error;
 
-	error = data->ops->initialize(client);
-	if (error) {
-		dev_err(&client->dev, "device initialize failed: %d\n", error);
-		return error;
+	if (!skip_reset) {
+		error = data->ops->initialize(client);
+		if (error) {
+			dev_err(&client->dev, "device initialize failed: %d\n", error);
+			return error;
+		}
 	}
 
 	error = elan_query_product(data);
@@ -311,16 +346,17 @@ static int __elan_initialize(struct elan_tp_data *data)
 	return 0;
 }
 
-static int elan_initialize(struct elan_tp_data *data)
+static int elan_initialize(struct elan_tp_data *data, bool skip_reset)
 {
 	int repeat = ETP_RETRY_COUNT;
 	int error;
 
 	do {
-		error = __elan_initialize(data);
+		error = __elan_initialize(data, skip_reset);
 		if (!error)
 			return 0;
 
+		skip_reset = false;
 		msleep(30);
 	} while (--repeat > 0);
 
@@ -357,6 +393,8 @@ static int elan_query_device_info(struct elan_tp_data *data)
 	if (error)
 		return error;
 
+	data->quirks = elan_i2c_lookup_quirks(data->ic_type, data->product_id);
+
 	error = elan_get_fwinfo(data->ic_type, data->iap_version,
 				&data->fw_validpage_count,
 				&data->fw_signature_address,
@@ -546,7 +584,7 @@ static int elan_update_firmware(struct elan_tp_data *data,
 		data->ops->iap_reset(client);
 	} else {
 		/* Reinitialize TP after fw is updated */
-		elan_initialize(data);
+		elan_initialize(data, false);
 		elan_query_device_info(data);
 	}
 
@@ -1247,7 +1285,7 @@ static int elan_probe(struct i2c_client *client,
 	}
 
 	/* Initialize the touchpad. */
-	error = elan_initialize(data);
+	error = elan_initialize(data, false);
 	if (error)
 		return error;
 
@@ -1384,7 +1422,7 @@ static int __maybe_unused elan_resume(struct device *dev)
 		goto err;
 	}
 
-	error = elan_initialize(data);
+	error = elan_initialize(data, data->quirks & ETP_QUIRK_QUICK_WAKEUP);
 	if (error)
 		dev_err(dev, "initialize when resuming failed: %d\n", error);
 
-- 
cgit v1.2.3


From e042e95bcab34b2265b0aaeb497030ea13c6c251 Mon Sep 17 00:00:00 2001
From: Tang Bin <tangbin@cmss.chinamobile.com>
Date: Mon, 22 Feb 2021 14:11:05 +0800
Subject: thermal: amlogic: Omit superfluous error message in
 amlogic_thermal_probe()

The function devm_platform_ioremap_resource has already contains error
message, so remove the redundant dev_err here.

Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210222061105.6008-1-tangbin@cmss.chinamobile.com
---
 drivers/thermal/amlogic_thermal.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/amlogic_thermal.c b/drivers/thermal/amlogic_thermal.c
index dffe3ba8c7c4..e61b91d14ad1 100644
--- a/drivers/thermal/amlogic_thermal.c
+++ b/drivers/thermal/amlogic_thermal.c
@@ -254,10 +254,8 @@ static int amlogic_thermal_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, pdata);
 
 	base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(base)) {
-		dev_err(dev, "failed to get io address\n");
+	if (IS_ERR(base))
 		return PTR_ERR(base);
-	}
 
 	pdata->regmap = devm_regmap_init_mmio(dev, base,
 					      pdata->data->regmap_config);
-- 
cgit v1.2.3


From 6606800192008bd2929c55614697645f53e07427 Mon Sep 17 00:00:00 2001
From: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Date: Fri, 5 Mar 2021 07:23:20 +0530
Subject: thermal: Fix a typo in the file soctherm.c

s/calibaration/calibration/

Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210305015320.7614-1-unixbhaskar@gmail.com
---
 drivers/thermal/tegra/soctherm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/thermal/tegra/soctherm.c b/drivers/thermal/tegra/soctherm.c
index 66e0639da4bf..8b8fbd49679b 100644
--- a/drivers/thermal/tegra/soctherm.c
+++ b/drivers/thermal/tegra/soctherm.c
@@ -2195,7 +2195,7 @@ static int tegra_soctherm_probe(struct platform_device *pdev)
 	if (err)
 		return err;
 
-	/* calculate tsensor calibaration data */
+	/* calculate tsensor calibration data */
 	for (i = 0; i < soc->num_tsensors; ++i) {
 		err = tegra_calc_tsensor_calib(&soc->tsensors[i],
 					       &shared_calib,
-- 
cgit v1.2.3


From 76d6329534ae3b2f344aa72cc978ef4cfd69c0c8 Mon Sep 17 00:00:00 2001
From: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Date: Fri, 5 Mar 2021 07:13:48 +0530
Subject: thermal: Fix couple of spellos in the file sun8i_thermal.c

s/calibartion/calibration/
s/undocummented/undocumented/

Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210305014348.17412-1-unixbhaskar@gmail.com
---
 drivers/thermal/sun8i_thermal.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c
index 8c80bd06dd9f..d9cd23cbb671 100644
--- a/drivers/thermal/sun8i_thermal.c
+++ b/drivers/thermal/sun8i_thermal.c
@@ -300,7 +300,7 @@ static int sun8i_ths_calibrate(struct ths_device *tmdev)
 		 * or 0x8xx, so they won't be away from the default value
 		 * for a lot.
 		 *
-		 * So here we do not return error if the calibartion data is
+		 * So here we do not return error if the calibration data is
 		 * not available, except the probe needs deferring.
 		 */
 		goto out;
@@ -418,7 +418,7 @@ static int sun8i_h3_thermal_init(struct ths_device *tmdev)
 }
 
 /*
- * Without this undocummented value, the returned temperatures would
+ * Without this undocumented value, the returned temperatures would
  * be higher than real ones by about 20C.
  */
 #define SUN50I_H6_CTRL0_UNK 0x0000002f
-- 
cgit v1.2.3


From 7fd49ca05be35a85c424a3ca8df931bd70c34535 Mon Sep 17 00:00:00 2001
From: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Date: Tue, 9 Mar 2021 17:24:19 +0100
Subject: thermal: rcar_gen3_thermal: Add support for up to five TSC nodes
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Add support for up to five TSC nodes. The new THCODE values are taken
from the example in the datasheet.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210309162419.2621359-1-niklas.soderlund+renesas@ragnatech.se
---
 drivers/thermal/rcar_gen3_thermal.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/thermal/rcar_gen3_thermal.c b/drivers/thermal/rcar_gen3_thermal.c
index 75c69fe6e955..e1e412348076 100644
--- a/drivers/thermal/rcar_gen3_thermal.c
+++ b/drivers/thermal/rcar_gen3_thermal.c
@@ -60,7 +60,7 @@
 #define MCELSIUS(temp)	((temp) * 1000)
 #define GEN3_FUSE_MASK	0xFFF
 
-#define TSC_MAX_NUM	4
+#define TSC_MAX_NUM	5
 
 /* default THCODE values if FUSEs are missing */
 static const int thcodes[TSC_MAX_NUM][3] = {
@@ -68,6 +68,7 @@ static const int thcodes[TSC_MAX_NUM][3] = {
 	{ 3393, 2795, 2216 },
 	{ 3389, 2805, 2237 },
 	{ 3415, 2694, 2195 },
+	{ 3356, 2724, 2244 },
 };
 
 /* Structure for thermal temperature calculation */
-- 
cgit v1.2.3


From 7440e912b0fe755d80b958a65859ebabb5338cf8 Mon Sep 17 00:00:00 2001
From: Zhang Yunkai <zhang.yunkai@zte.com.cn>
Date: Sat, 6 Mar 2021 04:34:15 -0800
Subject: thermal:ti-soc-thermal: Remove duplicate include in ti-bandgap

'of_device.h' included in 'ti-bandgap.c' is duplicated.
It is also included in the 25th line.

Signed-off-by: Zhang Yunkai <zhang.yunkai@zte.com.cn>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210306123415.219441-1-zhang.yunkai@zte.com.cn
---
 drivers/thermal/ti-soc-thermal/ti-bandgap.c | 1 -
 1 file changed, 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.c b/drivers/thermal/ti-soc-thermal/ti-bandgap.c
index 8a3646e26ddd..d81af89166d2 100644
--- a/drivers/thermal/ti-soc-thermal/ti-bandgap.c
+++ b/drivers/thermal/ti-soc-thermal/ti-bandgap.c
@@ -32,7 +32,6 @@
 #include <linux/pm_runtime.h>
 #include <linux/pm.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 
 #include "ti-bandgap.h"
 
-- 
cgit v1.2.3


From 45c7eaeb29d67224db4ba935deb575586a1fda09 Mon Sep 17 00:00:00 2001
From: Jia-Ju Bai <baijiaju1990@gmail.com>
Date: Wed, 10 Mar 2021 04:24:23 -0800
Subject: thermal: thermal_of: Fix error return code of
 thermal_of_populate_bind_params()

When kcalloc() returns NULL to __tcbp or of_count_phandle_with_args()
returns zero or -ENOENT to count, no error return code of
thermal_of_populate_bind_params() is assigned.
To fix these bugs, ret is assigned with -ENOMEM and -ENOENT in these
cases, respectively.

Fixes: a92bab8919e3 ("of: thermal: Allow multiple devices to share cooling map")
Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210310122423.3266-1-baijiaju1990@gmail.com
---
 drivers/thermal/thermal_of.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
index 69ef12f852b7..5b76f9a1280d 100644
--- a/drivers/thermal/thermal_of.c
+++ b/drivers/thermal/thermal_of.c
@@ -704,14 +704,17 @@ static int thermal_of_populate_bind_params(struct device_node *np,
 
 	count = of_count_phandle_with_args(np, "cooling-device",
 					   "#cooling-cells");
-	if (!count) {
+	if (count <= 0) {
 		pr_err("Add a cooling_device property with at least one device\n");
+		ret = -ENOENT;
 		goto end;
 	}
 
 	__tcbp = kcalloc(count, sizeof(*__tcbp), GFP_KERNEL);
-	if (!__tcbp)
+	if (!__tcbp) {
+		ret = -ENOMEM;
 		goto end;
+	}
 
 	for (i = 0; i < count; i++) {
 		ret = of_parse_phandle_with_args(np, "cooling-device",
-- 
cgit v1.2.3


From d9b7eae8e3424c3480fe9f40ebafbb0c96426e4c Mon Sep 17 00:00:00 2001
From: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Date: Mon, 22 Feb 2021 09:17:17 +0800
Subject: PCI/RCEC: Fix RCiEP device to RCEC association

rcec_assoc_rciep() used "rciep->devfn" (a single byte encoding both the
device and function number) as the device number to check whether the
corresponding bit was set in the RCEC's Association Bitmap for RCiEPs.

But per PCIe r5.0, sec 7.9.10.2, "Association Bitmap for RCiEPs", the
32-bit bitmap contains one bit per device.  That bit applies to all
functions of the device.

Fix rcec_assoc_rciep() to convert the value of "rciep->devfn" to a device
number to ensure that RCiEP devices are correctly associated with the RCEC.

Reported-and-tested-by: Wen Jin <wen.jin@intel.com>
Fixes: 507b460f8144 ("PCI/ERR: Add pcie_link_rcec() to associate RCiEPs")
Link: https://lore.kernel.org/r/20210222011717.43266-1-qiuxu.zhuo@intel.com
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Sean V Kelley <sean.v.kelley@intel.com>
---
 drivers/pci/pcie/rcec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pci/pcie/rcec.c b/drivers/pci/pcie/rcec.c
index 2c5c552994e4..d0bcd141ac9c 100644
--- a/drivers/pci/pcie/rcec.c
+++ b/drivers/pci/pcie/rcec.c
@@ -32,7 +32,7 @@ static bool rcec_assoc_rciep(struct pci_dev *rcec, struct pci_dev *rciep)
 
 	/* Same bus, so check bitmap */
 	for_each_set_bit(devn, &bitmap, 32)
-		if (devn == rciep->devfn)
+		if (devn == PCI_SLOT(rciep->devfn))
 			return true;
 
 	return false;
-- 
cgit v1.2.3


From 55cc33fab5ac9f7e2a97aa7c564e8b35355886d5 Mon Sep 17 00:00:00 2001
From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: Thu, 11 Mar 2021 09:48:09 +0100
Subject: rtc: m48t59: use platform_get_irq_optional

The IRQ is optional, avoid the error message by using
platform_get_irq_optional.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
 drivers/rtc/rtc-m48t59.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-m48t59.c b/drivers/rtc/rtc-m48t59.c
index 1d2e99a70fce..f0f6b9b6daec 100644
--- a/drivers/rtc/rtc-m48t59.c
+++ b/drivers/rtc/rtc-m48t59.c
@@ -421,7 +421,7 @@ static int m48t59_rtc_probe(struct platform_device *pdev)
 	/* Try to get irq number. We also can work in
 	 * the mode without IRQ.
 	 */
-	m48t59->irq = platform_get_irq(pdev, 0);
+	m48t59->irq = platform_get_irq_optional(pdev, 0);
 	if (m48t59->irq <= 0)
 		m48t59->irq = NO_IRQ;
 
-- 
cgit v1.2.3


From 780a980e2b047768130ddb68d39fbde84b049630 Mon Sep 17 00:00:00 2001
From: Yang Li <yang.lee@linux.alibaba.com>
Date: Wed, 24 Feb 2021 16:20:29 +0800
Subject: remoteproc: pru: Replace DEFINE_SIMPLE_ATTRIBUTE with
 DEFINE_DEBUGFS_ATTRIBUTE

Fix the following coccicheck warning:
./drivers/remoteproc/pru_rproc.c:247:0-23: WARNING:
pru_rproc_debug_ss_fops should be defined with DEFINE_DEBUGFS_ATTRIBUTE

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Link: https://lore.kernel.org/r/1614154829-42461-1-git-send-email-yang.lee@linux.alibaba.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/pru_rproc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
index 2667919d76b3..16b204ed657b 100644
--- a/drivers/remoteproc/pru_rproc.c
+++ b/drivers/remoteproc/pru_rproc.c
@@ -244,8 +244,8 @@ static int pru_rproc_debug_ss_get(void *data, u64 *val)
 
 	return 0;
 }
-DEFINE_SIMPLE_ATTRIBUTE(pru_rproc_debug_ss_fops, pru_rproc_debug_ss_get,
-			pru_rproc_debug_ss_set, "%llu\n");
+DEFINE_DEBUGFS_ATTRIBUTE(pru_rproc_debug_ss_fops, pru_rproc_debug_ss_get,
+			 pru_rproc_debug_ss_set, "%llu\n");
 
 /*
  * Create PRU-specific debugfs entries
-- 
cgit v1.2.3


From 2bf2346159bc99cf0679e25be20f4daca60f3f5c Mon Sep 17 00:00:00 2001
From: Jindong Yue <jindong.yue@nxp.com>
Date: Wed, 24 Feb 2021 13:58:25 +0800
Subject: remoteproc: core: Remove casting to rproc_handle_resource_t

There are four different callback functions that are used for the
rproc_handle_resource_t callback that all have different second
parameter types.

rproc_handle_vdev -> struct fw_rsc_vdev
rproc_handle_trace -> struct fw_rsc_trace
rproc_handle_devmem -> struct fw_rsc_devmem
rproc_handle_carveout -> struct fw_rsc_carveout

These callbacks are cast to rproc_handle_resource_t so that there is no
error about incompatible pointer types. Unfortunately, this is a Clang's
Control-Flow Integrity checking violation, which verifies that the
callback function's types match the prototypes exactly before jumping.

[    7.275750] Kernel panic - not syncing: CFI failure (target: rproc_handle_vdev+0x0/0x4)
[    7.283763] CPU: 2 PID: 1 Comm: init Tainted: G         C O      5.4.70-03301-g527af2c96672 #17
[    7.292463] Hardware name: NXP i.MX8MPlus EVK board (DT)
[    7.297779] Call trace:
[    7.300232]  dump_backtrace.cfi_jt+0x0/0x4
[    7.304337]  show_stack+0x18/0x24
[    7.307660]  dump_stack+0xb8/0x114
[    7.311069]  panic+0x164/0x3d4
[    7.314130]  __ubsan_handle_cfi_check_fail_abort+0x0/0x14
[    7.319533]  perf_proc_update_handler+0x0/0xcc
[    7.323983]  __cfi_check+0x63278/0x6a290
[    7.327913]  rproc_boot+0x3f8/0x738
[    7.331404]  rproc_add+0x68/0x110
[    7.334738]  imx_rproc_probe+0x5e4/0x708 [imx_rproc]
[    7.339711]  platform_drv_probe+0xac/0xf0
[    7.343726]  really_probe+0x260/0x65c
[    7.347393]  driver_probe_device+0x64/0x100
[    7.351580]  device_driver_attach+0x6c/0xac
[    7.355766]  __driver_attach+0xdc/0x184
[    7.359609]  bus_for_each_dev+0x98/0x104
[    7.363537]  driver_attach+0x24/0x30
[    7.367117]  bus_add_driver+0x100/0x1e0
[    7.370958]  driver_register+0x78/0x114
[    7.374800]  __platform_driver_register+0x44/0x50
[    7.379514]  init_module+0x20/0xfe8 [imx_rproc]
[    7.384049]  do_one_initcall+0x190/0x348
[    7.387979]  do_init_module+0x5c/0x210
[    7.391731]  load_module+0x2fbc/0x3590
[    7.395485]  __arm64_sys_finit_module+0xb8/0xec
[    7.400025]  el0_svc_common+0xb4/0x19c
[    7.403777]  el0_svc_handler+0x74/0x98
[    7.407531]  el0_svc+0x8/0xc
[    7.410419] SMP: stopping secondary CPUs
[    7.414648] Kernel Offset: disabled
[    7.418142] CPU features: 0x00010002,2000200c
[    7.422501] Memory Limit: none

To fix this, change the second parameter of all functions to void * and
use a local variable with the correct type so that everything works
properly. With this, we can remove casting to rproc_handle_resource_t
for these functions.

Signed-off-by: Jindong Yue <jindong.yue@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210224055825.7417-1-jindong.yue@nxp.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_core.c | 29 ++++++++++++++++-------------
 1 file changed, 16 insertions(+), 13 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index ab150765d124..553e42a4d2a0 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -482,7 +482,7 @@ static int copy_dma_range_map(struct device *to, struct device *from)
 /**
  * rproc_handle_vdev() - handle a vdev fw resource
  * @rproc: the remote processor
- * @rsc: the vring resource descriptor
+ * @ptr: the vring resource descriptor
  * @offset: offset of the resource entry
  * @avail: size of available data (for sanity checking the image)
  *
@@ -507,9 +507,10 @@ static int copy_dma_range_map(struct device *to, struct device *from)
  *
  * Returns 0 on success, or an appropriate error code otherwise
  */
-static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc,
+static int rproc_handle_vdev(struct rproc *rproc, void *ptr,
 			     int offset, int avail)
 {
+	struct fw_rsc_vdev *rsc = ptr;
 	struct device *dev = &rproc->dev;
 	struct rproc_vdev *rvdev;
 	int i, ret;
@@ -627,7 +628,7 @@ void rproc_vdev_release(struct kref *ref)
 /**
  * rproc_handle_trace() - handle a shared trace buffer resource
  * @rproc: the remote processor
- * @rsc: the trace resource descriptor
+ * @ptr: the trace resource descriptor
  * @offset: offset of the resource entry
  * @avail: size of available data (for sanity checking the image)
  *
@@ -641,9 +642,10 @@ void rproc_vdev_release(struct kref *ref)
  *
  * Returns 0 on success, or an appropriate error code otherwise
  */
-static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc,
+static int rproc_handle_trace(struct rproc *rproc, void *ptr,
 			      int offset, int avail)
 {
+	struct fw_rsc_trace *rsc = ptr;
 	struct rproc_debug_trace *trace;
 	struct device *dev = &rproc->dev;
 	char name[15];
@@ -693,7 +695,7 @@ static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc,
 /**
  * rproc_handle_devmem() - handle devmem resource entry
  * @rproc: remote processor handle
- * @rsc: the devmem resource entry
+ * @ptr: the devmem resource entry
  * @offset: offset of the resource entry
  * @avail: size of available data (for sanity checking the image)
  *
@@ -716,9 +718,10 @@ static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc,
  * and not allow firmwares to request access to physical addresses that
  * are outside those ranges.
  */
-static int rproc_handle_devmem(struct rproc *rproc, struct fw_rsc_devmem *rsc,
+static int rproc_handle_devmem(struct rproc *rproc, void *ptr,
 			       int offset, int avail)
 {
+	struct fw_rsc_devmem *rsc = ptr;
 	struct rproc_mem_entry *mapping;
 	struct device *dev = &rproc->dev;
 	int ret;
@@ -896,7 +899,7 @@ static int rproc_release_carveout(struct rproc *rproc,
 /**
  * rproc_handle_carveout() - handle phys contig memory allocation requests
  * @rproc: rproc handle
- * @rsc: the resource entry
+ * @ptr: the resource entry
  * @offset: offset of the resource entry
  * @avail: size of available data (for image validation)
  *
@@ -913,9 +916,9 @@ static int rproc_release_carveout(struct rproc *rproc,
  * pressure is important; it may have a substantial impact on performance.
  */
 static int rproc_handle_carveout(struct rproc *rproc,
-				 struct fw_rsc_carveout *rsc,
-				 int offset, int avail)
+				 void *ptr, int offset, int avail)
 {
+	struct fw_rsc_carveout *rsc = ptr;
 	struct rproc_mem_entry *carveout;
 	struct device *dev = &rproc->dev;
 
@@ -1097,10 +1100,10 @@ EXPORT_SYMBOL(rproc_of_parse_firmware);
  * enum fw_resource_type.
  */
 static rproc_handle_resource_t rproc_loading_handlers[RSC_LAST] = {
-	[RSC_CARVEOUT] = (rproc_handle_resource_t)rproc_handle_carveout,
-	[RSC_DEVMEM] = (rproc_handle_resource_t)rproc_handle_devmem,
-	[RSC_TRACE] = (rproc_handle_resource_t)rproc_handle_trace,
-	[RSC_VDEV] = (rproc_handle_resource_t)rproc_handle_vdev,
+	[RSC_CARVEOUT] = rproc_handle_carveout,
+	[RSC_DEVMEM] = rproc_handle_devmem,
+	[RSC_TRACE] = rproc_handle_trace,
+	[RSC_VDEV] = rproc_handle_vdev,
 };
 
 /* handle firmware resource entries before booting the remote processor */
-- 
cgit v1.2.3


From 40df0a91b2a5228ded8e5f75b80d28c96c6831cd Mon Sep 17 00:00:00 2001
From: Peng Fan <peng.fan@nxp.com>
Date: Sat, 6 Mar 2021 19:24:19 +0800
Subject: remoteproc: add is_iomem to da_to_va

Introduce an extra parameter is_iomem to da_to_va, then the caller
could take the memory as normal memory or io mapped memory.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/1615029865-23312-5-git-send-email-peng.fan@oss.nxp.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/imx_rproc.c             |  2 +-
 drivers/remoteproc/ingenic_rproc.c         |  2 +-
 drivers/remoteproc/keystone_remoteproc.c   |  2 +-
 drivers/remoteproc/mtk_scp.c               |  6 +++---
 drivers/remoteproc/omap_remoteproc.c       |  2 +-
 drivers/remoteproc/pru_rproc.c             |  2 +-
 drivers/remoteproc/qcom_q6v5_adsp.c        |  2 +-
 drivers/remoteproc/qcom_q6v5_pas.c         |  2 +-
 drivers/remoteproc/qcom_q6v5_wcss.c        |  2 +-
 drivers/remoteproc/qcom_wcnss.c            |  2 +-
 drivers/remoteproc/remoteproc_core.c       |  7 +++++--
 drivers/remoteproc/remoteproc_coredump.c   |  8 ++++++--
 drivers/remoteproc/remoteproc_debugfs.c    |  2 +-
 drivers/remoteproc/remoteproc_elf_loader.c | 21 +++++++++++++++------
 drivers/remoteproc/remoteproc_internal.h   |  2 +-
 drivers/remoteproc/st_slim_rproc.c         |  2 +-
 drivers/remoteproc/ti_k3_dsp_remoteproc.c  |  2 +-
 drivers/remoteproc/ti_k3_r5_remoteproc.c   |  2 +-
 drivers/remoteproc/wkup_m3_rproc.c         |  2 +-
 include/linux/remoteproc.h                 |  2 +-
 20 files changed, 45 insertions(+), 29 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 8957ed271d20..6603e00bb6f4 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -208,7 +208,7 @@ static int imx_rproc_da_to_sys(struct imx_rproc *priv, u64 da,
 	return -ENOENT;
 }
 
-static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
+static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 {
 	struct imx_rproc *priv = rproc->priv;
 	void *va = NULL;
diff --git a/drivers/remoteproc/ingenic_rproc.c b/drivers/remoteproc/ingenic_rproc.c
index e2618c36eaab..a356738160a4 100644
--- a/drivers/remoteproc/ingenic_rproc.c
+++ b/drivers/remoteproc/ingenic_rproc.c
@@ -121,7 +121,7 @@ static void ingenic_rproc_kick(struct rproc *rproc, int vqid)
 	writel(vqid, vpu->aux_base + REG_CORE_MSG);
 }
 
-static void *ingenic_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
+static void *ingenic_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 {
 	struct vpu *vpu = rproc->priv;
 	void __iomem *va = NULL;
diff --git a/drivers/remoteproc/keystone_remoteproc.c b/drivers/remoteproc/keystone_remoteproc.c
index cd266163a65f..54781f553f4e 100644
--- a/drivers/remoteproc/keystone_remoteproc.c
+++ b/drivers/remoteproc/keystone_remoteproc.c
@@ -246,7 +246,7 @@ static void keystone_rproc_kick(struct rproc *rproc, int vqid)
  * can be used either by the remoteproc core for loading (when using kernel
  * remoteproc loader), or by any rpmsg bus drivers.
  */
-static void *keystone_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
+static void *keystone_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 {
 	struct keystone_rproc *ksproc = rproc->priv;
 	void __iomem *va = NULL;
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index ce727598c41c..9679cc26895e 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -272,7 +272,7 @@ static int scp_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
 		}
 
 		/* grab the kernel address for this device address */
-		ptr = (void __iomem *)rproc_da_to_va(rproc, da, memsz);
+		ptr = (void __iomem *)rproc_da_to_va(rproc, da, memsz, NULL);
 		if (!ptr) {
 			dev_err(dev, "bad phdr da 0x%x mem 0x%x\n", da, memsz);
 			ret = -EINVAL;
@@ -509,7 +509,7 @@ static void *mt8192_scp_da_to_va(struct mtk_scp *scp, u64 da, size_t len)
 	return NULL;
 }
 
-static void *scp_da_to_va(struct rproc *rproc, u64 da, size_t len)
+static void *scp_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 {
 	struct mtk_scp *scp = (struct mtk_scp *)rproc->priv;
 
@@ -627,7 +627,7 @@ void *scp_mapping_dm_addr(struct mtk_scp *scp, u32 mem_addr)
 {
 	void *ptr;
 
-	ptr = scp_da_to_va(scp->rproc, mem_addr, 0);
+	ptr = scp_da_to_va(scp->rproc, mem_addr, 0, NULL);
 	if (!ptr)
 		return ERR_PTR(-EINVAL);
 
diff --git a/drivers/remoteproc/omap_remoteproc.c b/drivers/remoteproc/omap_remoteproc.c
index d94b7391bf9d..43531caa1959 100644
--- a/drivers/remoteproc/omap_remoteproc.c
+++ b/drivers/remoteproc/omap_remoteproc.c
@@ -728,7 +728,7 @@ out:
  * Return: translated virtual address in kernel memory space on success,
  *         or NULL on failure.
  */
-static void *omap_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
+static void *omap_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 {
 	struct omap_rproc *oproc = rproc->priv;
 	int i;
diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
index 16b204ed657b..d6086f90e809 100644
--- a/drivers/remoteproc/pru_rproc.c
+++ b/drivers/remoteproc/pru_rproc.c
@@ -465,7 +465,7 @@ static void *pru_i_da_to_va(struct pru_rproc *pru, u32 da, size_t len)
  * core for any PRU client drivers. The PRU Instruction RAM access is restricted
  * only to the PRU loader code.
  */
-static void *pru_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
+static void *pru_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 {
 	struct pru_rproc *pru = rproc->priv;
 
diff --git a/drivers/remoteproc/qcom_q6v5_adsp.c b/drivers/remoteproc/qcom_q6v5_adsp.c
index e02450225e4a..8b0d8bbacd2e 100644
--- a/drivers/remoteproc/qcom_q6v5_adsp.c
+++ b/drivers/remoteproc/qcom_q6v5_adsp.c
@@ -281,7 +281,7 @@ static int adsp_stop(struct rproc *rproc)
 	return ret;
 }
 
-static void *adsp_da_to_va(struct rproc *rproc, u64 da, size_t len)
+static void *adsp_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 {
 	struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
 	int offset;
diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
index e635454d6170..ef85b5511dc9 100644
--- a/drivers/remoteproc/qcom_q6v5_pas.c
+++ b/drivers/remoteproc/qcom_q6v5_pas.c
@@ -242,7 +242,7 @@ static int adsp_stop(struct rproc *rproc)
 	return ret;
 }
 
-static void *adsp_da_to_va(struct rproc *rproc, u64 da, size_t len)
+static void *adsp_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 {
 	struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
 	int offset;
diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c
index 78ebe1168b33..704cd63c9af4 100644
--- a/drivers/remoteproc/qcom_q6v5_wcss.c
+++ b/drivers/remoteproc/qcom_q6v5_wcss.c
@@ -410,7 +410,7 @@ static int q6v5_wcss_stop(struct rproc *rproc)
 	return 0;
 }
 
-static void *q6v5_wcss_da_to_va(struct rproc *rproc, u64 da, size_t len)
+static void *q6v5_wcss_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 {
 	struct q6v5_wcss *wcss = rproc->priv;
 	int offset;
diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c
index 2a6a23cb14ca..3a131163064c 100644
--- a/drivers/remoteproc/qcom_wcnss.c
+++ b/drivers/remoteproc/qcom_wcnss.c
@@ -320,7 +320,7 @@ static int wcnss_stop(struct rproc *rproc)
 	return ret;
 }
 
-static void *wcnss_da_to_va(struct rproc *rproc, u64 da, size_t len)
+static void *wcnss_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 {
 	struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
 	int offset;
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 553e42a4d2a0..5071cdbfc926 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -189,13 +189,13 @@ EXPORT_SYMBOL(rproc_va_to_pa);
  * here the output of the DMA API for the carveouts, which should be more
  * correct.
  */
-void *rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
+void *rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 {
 	struct rproc_mem_entry *carveout;
 	void *ptr = NULL;
 
 	if (rproc->ops->da_to_va) {
-		ptr = rproc->ops->da_to_va(rproc, da, len);
+		ptr = rproc->ops->da_to_va(rproc, da, len, is_iomem);
 		if (ptr)
 			goto out;
 	}
@@ -217,6 +217,9 @@ void *rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
 
 		ptr = carveout->va + offset;
 
+		if (is_iomem)
+			*is_iomem = carveout->is_iomem;
+
 		break;
 	}
 
diff --git a/drivers/remoteproc/remoteproc_coredump.c b/drivers/remoteproc/remoteproc_coredump.c
index 81ec154a6a5e..aee657cc08c6 100644
--- a/drivers/remoteproc/remoteproc_coredump.c
+++ b/drivers/remoteproc/remoteproc_coredump.c
@@ -153,18 +153,22 @@ static void rproc_copy_segment(struct rproc *rproc, void *dest,
 			       size_t offset, size_t size)
 {
 	void *ptr;
+	bool is_iomem;
 
 	if (segment->dump) {
 		segment->dump(rproc, segment, dest, offset, size);
 	} else {
-		ptr = rproc_da_to_va(rproc, segment->da + offset, size);
+		ptr = rproc_da_to_va(rproc, segment->da + offset, size, &is_iomem);
 		if (!ptr) {
 			dev_err(&rproc->dev,
 				"invalid copy request for segment %pad with offset %zu and size %zu)\n",
 				&segment->da, offset, size);
 			memset(dest, 0xff, size);
 		} else {
-			memcpy(dest, ptr, size);
+			if (is_iomem)
+				memcpy_fromio(dest, ptr, size);
+			else
+				memcpy(dest, ptr, size);
 		}
 	}
 }
diff --git a/drivers/remoteproc/remoteproc_debugfs.c b/drivers/remoteproc/remoteproc_debugfs.c
index 7e5845376e9f..b5a1e3b697d9 100644
--- a/drivers/remoteproc/remoteproc_debugfs.c
+++ b/drivers/remoteproc/remoteproc_debugfs.c
@@ -132,7 +132,7 @@ static ssize_t rproc_trace_read(struct file *filp, char __user *userbuf,
 	char buf[100];
 	int len;
 
-	va = rproc_da_to_va(data->rproc, trace->da, trace->len);
+	va = rproc_da_to_va(data->rproc, trace->da, trace->len, NULL);
 
 	if (!va) {
 		len = scnprintf(buf, sizeof(buf), "Trace %s not available\n",
diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c
index df68d87752e4..11423588965a 100644
--- a/drivers/remoteproc/remoteproc_elf_loader.c
+++ b/drivers/remoteproc/remoteproc_elf_loader.c
@@ -175,6 +175,7 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
 		u64 offset = elf_phdr_get_p_offset(class, phdr);
 		u32 type = elf_phdr_get_p_type(class, phdr);
 		void *ptr;
+		bool is_iomem;
 
 		if (type != PT_LOAD)
 			continue;
@@ -204,7 +205,7 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
 		}
 
 		/* grab the kernel address for this device address */
-		ptr = rproc_da_to_va(rproc, da, memsz);
+		ptr = rproc_da_to_va(rproc, da, memsz, &is_iomem);
 		if (!ptr) {
 			dev_err(dev, "bad phdr da 0x%llx mem 0x%llx\n", da,
 				memsz);
@@ -213,8 +214,12 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
 		}
 
 		/* put the segment where the remote processor expects it */
-		if (filesz)
-			memcpy(ptr, elf_data + offset, filesz);
+		if (filesz) {
+			if (is_iomem)
+				memcpy_fromio(ptr, (void __iomem *)(elf_data + offset), filesz);
+			else
+				memcpy(ptr, elf_data + offset, filesz);
+		}
 
 		/*
 		 * Zero out remaining memory for this segment.
@@ -223,8 +228,12 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
 		 * did this for us. albeit harmless, we may consider removing
 		 * this.
 		 */
-		if (memsz > filesz)
-			memset(ptr + filesz, 0, memsz - filesz);
+		if (memsz > filesz) {
+			if (is_iomem)
+				memset_io((void __iomem *)(ptr + filesz), 0, memsz - filesz);
+			else
+				memset(ptr + filesz, 0, memsz - filesz);
+		}
 	}
 
 	return ret;
@@ -377,6 +386,6 @@ struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc,
 		return NULL;
 	}
 
-	return rproc_da_to_va(rproc, sh_addr, sh_size);
+	return rproc_da_to_va(rproc, sh_addr, sh_size, NULL);
 }
 EXPORT_SYMBOL(rproc_elf_find_loaded_rsc_table);
diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
index c34002888d2c..9ea37aa687d2 100644
--- a/drivers/remoteproc/remoteproc_internal.h
+++ b/drivers/remoteproc/remoteproc_internal.h
@@ -84,7 +84,7 @@ static inline void  rproc_char_device_remove(struct rproc *rproc)
 void rproc_free_vring(struct rproc_vring *rvring);
 int rproc_alloc_vring(struct rproc_vdev *rvdev, int i);
 
-void *rproc_da_to_va(struct rproc *rproc, u64 da, size_t len);
+void *rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem);
 phys_addr_t rproc_va_to_pa(void *cpu_addr);
 int rproc_trigger_recovery(struct rproc *rproc);
 
diff --git a/drivers/remoteproc/st_slim_rproc.c b/drivers/remoteproc/st_slim_rproc.c
index 09bcb4d8b9e0..22096adc1ad3 100644
--- a/drivers/remoteproc/st_slim_rproc.c
+++ b/drivers/remoteproc/st_slim_rproc.c
@@ -174,7 +174,7 @@ static int slim_rproc_stop(struct rproc *rproc)
 	return 0;
 }
 
-static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
+static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 {
 	struct st_slim_rproc *slim_rproc = rproc->priv;
 	void *va = NULL;
diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
index 863c0214e0a8..fd4eb67a6681 100644
--- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
@@ -354,7 +354,7 @@ static int k3_dsp_rproc_stop(struct rproc *rproc)
  * can be used either by the remoteproc core for loading (when using kernel
  * remoteproc loader), or by any rpmsg bus drivers.
  */
-static void *k3_dsp_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
+static void *k3_dsp_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 {
 	struct k3_dsp_rproc *kproc = rproc->priv;
 	void __iomem *va = NULL;
diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c
index 62b5a4c29456..5cf8d030a1f0 100644
--- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
@@ -590,7 +590,7 @@ out:
  * present in a DSP or IPU device). The translated addresses can be used
  * either by the remoteproc core for loading, or by any rpmsg bus drivers.
  */
-static void *k3_r5_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
+static void *k3_r5_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 {
 	struct k3_r5_rproc *kproc = rproc->priv;
 	struct k3_r5_core *core = kproc->core;
diff --git a/drivers/remoteproc/wkup_m3_rproc.c b/drivers/remoteproc/wkup_m3_rproc.c
index 92d387dfc03b..484f7605823e 100644
--- a/drivers/remoteproc/wkup_m3_rproc.c
+++ b/drivers/remoteproc/wkup_m3_rproc.c
@@ -89,7 +89,7 @@ static int wkup_m3_rproc_stop(struct rproc *rproc)
 	return error;
 }
 
-static void *wkup_m3_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
+static void *wkup_m3_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
 {
 	struct wkup_m3_rproc *wkupm3 = rproc->priv;
 	void *va = NULL;
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index a5f6d2d9cde2..1b7d56c7a453 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -386,7 +386,7 @@ struct rproc_ops {
 	int (*stop)(struct rproc *rproc);
 	int (*attach)(struct rproc *rproc);
 	void (*kick)(struct rproc *rproc, int vqid);
-	void * (*da_to_va)(struct rproc *rproc, u64 da, size_t len);
+	void * (*da_to_va)(struct rproc *rproc, u64 da, size_t len, bool *is_iomem);
 	int (*parse_fw)(struct rproc *rproc, const struct firmware *fw);
 	int (*handle_rsc)(struct rproc *rproc, u32 rsc_type, void *rsc,
 			  int offset, int avail);
-- 
cgit v1.2.3


From 1896b3d82c555eaec6f6bde0c8d12377060bb22d Mon Sep 17 00:00:00 2001
From: Peng Fan <peng.fan@nxp.com>
Date: Sat, 6 Mar 2021 19:24:20 +0800
Subject: remoteproc: imx_rproc: correct err message

It is using devm_ioremap, so not devm_ioremap_resource. Correct
the error message and print out sa/size.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/1615029865-23312-6-git-send-email-peng.fan@oss.nxp.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/imx_rproc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 6603e00bb6f4..2a093cea4997 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -268,7 +268,7 @@ static int imx_rproc_addr_init(struct imx_rproc *priv,
 		priv->mem[b].cpu_addr = devm_ioremap(&pdev->dev,
 						     att->sa, att->size);
 		if (!priv->mem[b].cpu_addr) {
-			dev_err(dev, "devm_ioremap_resource failed\n");
+			dev_err(dev, "failed to remap %#x bytes from %#x\n", att->size, att->sa);
 			return -ENOMEM;
 		}
 		priv->mem[b].sys_addr = att->sa;
@@ -298,7 +298,7 @@ static int imx_rproc_addr_init(struct imx_rproc *priv,
 
 		priv->mem[b].cpu_addr = devm_ioremap_resource(&pdev->dev, &res);
 		if (IS_ERR(priv->mem[b].cpu_addr)) {
-			dev_err(dev, "devm_ioremap_resource failed\n");
+			dev_err(dev, "failed to remap %pr\n", &res);
 			err = PTR_ERR(priv->mem[b].cpu_addr);
 			return err;
 		}
-- 
cgit v1.2.3


From ecadcc47492cc73a9bb92fbf16098192df514b87 Mon Sep 17 00:00:00 2001
From: Peng Fan <peng.fan@nxp.com>
Date: Sat, 6 Mar 2021 19:24:21 +0800
Subject: remoteproc: imx_rproc: use devm_ioremap

We might need to map an region multiple times, becaue the region might
be shared between remote processors, such i.MX8QM with dual M4 cores.
So use devm_ioremap, not devm_ioremap_resource.

Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/1615029865-23312-7-git-send-email-peng.fan@oss.nxp.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/imx_rproc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 2a093cea4997..47fc1d06be6a 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -296,7 +296,8 @@ static int imx_rproc_addr_init(struct imx_rproc *priv,
 		if (b >= IMX7D_RPROC_MEM_MAX)
 			break;
 
-		priv->mem[b].cpu_addr = devm_ioremap_resource(&pdev->dev, &res);
+		/* Not use resource version, because we might share region */
+		priv->mem[b].cpu_addr = devm_ioremap(&pdev->dev, res.start, resource_size(&res));
 		if (IS_ERR(priv->mem[b].cpu_addr)) {
 			dev_err(dev, "failed to remap %pr\n", &res);
 			err = PTR_ERR(priv->mem[b].cpu_addr);
-- 
cgit v1.2.3


From b29b4249f8f0cad1a1787cbe59e638ff23d489ed Mon Sep 17 00:00:00 2001
From: Peng Fan <peng.fan@nxp.com>
Date: Sat, 6 Mar 2021 19:24:22 +0800
Subject: remoteproc: imx_rproc: add i.MX specific parse fw hook

The hook is used to parse memory-regions and load resource table
from the address the remote processor published.

Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/1615029865-23312-8-git-send-email-peng.fan@oss.nxp.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/imx_rproc.c | 93 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)

(limited to 'drivers')

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 47fc1d06be6a..5ae1f5209548 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -10,6 +10,7 @@
 #include <linux/mfd/syscon.h>
 #include <linux/module.h>
 #include <linux/of_address.h>
+#include <linux/of_reserved_mem.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
@@ -241,10 +242,102 @@ static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *i
 	return va;
 }
 
+static int imx_rproc_mem_alloc(struct rproc *rproc,
+			       struct rproc_mem_entry *mem)
+{
+	struct device *dev = rproc->dev.parent;
+	void *va;
+
+	dev_dbg(dev, "map memory: %p+%zx\n", &mem->dma, mem->len);
+	va = ioremap_wc(mem->dma, mem->len);
+	if (IS_ERR_OR_NULL(va)) {
+		dev_err(dev, "Unable to map memory region: %p+%zx\n",
+			&mem->dma, mem->len);
+		return -ENOMEM;
+	}
+
+	/* Update memory entry va */
+	mem->va = va;
+
+	return 0;
+}
+
+static int imx_rproc_mem_release(struct rproc *rproc,
+				 struct rproc_mem_entry *mem)
+{
+	dev_dbg(rproc->dev.parent, "unmap memory: %pa\n", &mem->dma);
+	iounmap(mem->va);
+
+	return 0;
+}
+
+static int imx_rproc_parse_memory_regions(struct rproc *rproc)
+{
+	struct imx_rproc *priv = rproc->priv;
+	struct device_node *np = priv->dev->of_node;
+	struct of_phandle_iterator it;
+	struct rproc_mem_entry *mem;
+	struct reserved_mem *rmem;
+	u32 da;
+
+	/* Register associated reserved memory regions */
+	of_phandle_iterator_init(&it, np, "memory-region", NULL, 0);
+	while (of_phandle_iterator_next(&it) == 0) {
+		/*
+		 * Ignore the first memory region which will be used vdev buffer.
+		 * No need to do extra handlings, rproc_add_virtio_dev will handle it.
+		 */
+		if (!strcmp(it.node->name, "vdev0buffer"))
+			continue;
+
+		rmem = of_reserved_mem_lookup(it.node);
+		if (!rmem) {
+			dev_err(priv->dev, "unable to acquire memory-region\n");
+			return -EINVAL;
+		}
+
+		/* No need to translate pa to da, i.MX use same map */
+		da = rmem->base;
+
+		/* Register memory region */
+		mem = rproc_mem_entry_init(priv->dev, NULL, (dma_addr_t)rmem->base, rmem->size, da,
+					   imx_rproc_mem_alloc, imx_rproc_mem_release,
+					   it.node->name);
+
+		if (mem)
+			rproc_coredump_add_segment(rproc, da, rmem->size);
+		else
+			return -ENOMEM;
+
+		rproc_add_carveout(rproc, mem);
+	}
+
+	return  0;
+}
+
+static int imx_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
+{
+	int ret = imx_rproc_parse_memory_regions(rproc);
+
+	if (ret)
+		return ret;
+
+	ret = rproc_elf_load_rsc_table(rproc, fw);
+	if (ret)
+		dev_info(&rproc->dev, "No resource table in elf\n");
+
+	return 0;
+}
+
 static const struct rproc_ops imx_rproc_ops = {
 	.start		= imx_rproc_start,
 	.stop		= imx_rproc_stop,
 	.da_to_va       = imx_rproc_da_to_va,
+	.load		= rproc_elf_load_segments,
+	.parse_fw	= imx_rproc_parse_fw,
+	.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
+	.sanity_check	= rproc_elf_sanity_check,
+	.get_boot_addr	= rproc_elf_get_boot_addr,
 };
 
 static int imx_rproc_addr_init(struct imx_rproc *priv,
-- 
cgit v1.2.3


From 4ab8f9607aad6323826c9b945dee52e565975fcc Mon Sep 17 00:00:00 2001
From: Peng Fan <peng.fan@nxp.com>
Date: Sat, 6 Mar 2021 19:24:23 +0800
Subject: remoteproc: imx_rproc: support i.MX8MQ/M

Add i.MX8MQ dev/sys addr map and configuration data structure
i.MX8MM share i.MX8MQ settings.

Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/1615029865-23312-9-git-send-email-peng.fan@oss.nxp.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/Kconfig     |  6 +++---
 drivers/remoteproc/imx_rproc.c | 41 ++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 43 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 15d1574d129b..7cf3d1b40c55 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -24,11 +24,11 @@ config REMOTEPROC_CDEV
 	  It's safe to say N if you don't want to use this interface.
 
 config IMX_REMOTEPROC
-	tristate "IMX6/7 remoteproc support"
+	tristate "i.MX remoteproc support"
 	depends on ARCH_MXC
 	help
-	  Say y here to support iMX's remote processors (Cortex M4
-	  on iMX7D) via the remote processor framework.
+	  Say y here to support iMX's remote processors via the remote
+	  processor framework.
 
 	  It's safe to say N here.
 
diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 5ae1f5209548..0124ebf69838 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -88,6 +88,34 @@ struct imx_rproc {
 	struct clk			*clk;
 };
 
+static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
+	/* dev addr , sys addr  , size	    , flags */
+	/* TCML - alias */
+	{ 0x00000000, 0x007e0000, 0x00020000, 0 },
+	/* OCRAM_S */
+	{ 0x00180000, 0x00180000, 0x00008000, 0 },
+	/* OCRAM */
+	{ 0x00900000, 0x00900000, 0x00020000, 0 },
+	/* OCRAM */
+	{ 0x00920000, 0x00920000, 0x00020000, 0 },
+	/* QSPI Code - alias */
+	{ 0x08000000, 0x08000000, 0x08000000, 0 },
+	/* DDR (Code) - alias */
+	{ 0x10000000, 0x80000000, 0x0FFE0000, 0 },
+	/* TCML */
+	{ 0x1FFE0000, 0x007E0000, 0x00020000, ATT_OWN },
+	/* TCMU */
+	{ 0x20000000, 0x00800000, 0x00020000, ATT_OWN },
+	/* OCRAM_S */
+	{ 0x20180000, 0x00180000, 0x00008000, ATT_OWN },
+	/* OCRAM */
+	{ 0x20200000, 0x00900000, 0x00020000, ATT_OWN },
+	/* OCRAM */
+	{ 0x20220000, 0x00920000, 0x00020000, ATT_OWN },
+	/* DDR (Data) */
+	{ 0x40000000, 0x40000000, 0x80000000, 0 },
+};
+
 static const struct imx_rproc_att imx_rproc_att_imx7d[] = {
 	/* dev addr , sys addr  , size	    , flags */
 	/* OCRAM_S (M4 Boot code) - alias */
@@ -138,6 +166,15 @@ static const struct imx_rproc_att imx_rproc_att_imx6sx[] = {
 	{ 0x80000000, 0x80000000, 0x60000000, 0 },
 };
 
+static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mq = {
+	.src_reg	= IMX7D_SRC_SCR,
+	.src_mask	= IMX7D_M4_RST_MASK,
+	.src_start	= IMX7D_M4_START,
+	.src_stop	= IMX7D_M4_STOP,
+	.att		= imx_rproc_att_imx8mq,
+	.att_size	= ARRAY_SIZE(imx_rproc_att_imx8mq),
+};
+
 static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
 	.src_reg	= IMX7D_SRC_SCR,
 	.src_mask	= IMX7D_M4_RST_MASK,
@@ -496,6 +533,8 @@ static int imx_rproc_remove(struct platform_device *pdev)
 static const struct of_device_id imx_rproc_of_match[] = {
 	{ .compatible = "fsl,imx7d-cm4", .data = &imx_rproc_cfg_imx7d },
 	{ .compatible = "fsl,imx6sx-cm4", .data = &imx_rproc_cfg_imx6sx },
+	{ .compatible = "fsl,imx8mq-cm4", .data = &imx_rproc_cfg_imx8mq },
+	{ .compatible = "fsl,imx8mm-cm4", .data = &imx_rproc_cfg_imx8mq },
 	{},
 };
 MODULE_DEVICE_TABLE(of, imx_rproc_of_match);
@@ -512,5 +551,5 @@ static struct platform_driver imx_rproc_driver = {
 module_platform_driver(imx_rproc_driver);
 
 MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("IMX6SX/7D remote processor control driver");
+MODULE_DESCRIPTION("i.MX remote processor control driver");
 MODULE_AUTHOR("Oleksij Rempel <o.rempel@pengutronix.de>");
-- 
cgit v1.2.3


From 8f2d8961640f0346cbe892273c3260a0d30c1931 Mon Sep 17 00:00:00 2001
From: Peng Fan <peng.fan@nxp.com>
Date: Sat, 6 Mar 2021 19:24:24 +0800
Subject: remoteproc: imx_rproc: ignore mapping vdev regions

vdev regions are vdev0vring0, vdev0vring1, vdevbuffer and similar.
They are handled by remoteproc common code, no need to map in imx
rproc driver.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/1615029865-23312-10-git-send-email-peng.fan@oss.nxp.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/imx_rproc.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 0124ebf69838..3685bbd135b0 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -417,6 +417,9 @@ static int imx_rproc_addr_init(struct imx_rproc *priv,
 		struct resource res;
 
 		node = of_parse_phandle(np, "memory-region", a);
+		/* Not map vdev region */
+		if (!strcmp(node->name, "vdev"))
+			continue;
 		err = of_address_to_resource(node, 0, &res);
 		if (err) {
 			dev_err(dev, "unable to resolve memory region\n");
-- 
cgit v1.2.3


From 2df7062002d0263bde70b453f671bb4f8493e169 Mon Sep 17 00:00:00 2001
From: Peng Fan <peng.fan@nxp.com>
Date: Sat, 6 Mar 2021 19:24:25 +0800
Subject: remoteproc: imx_proc: enable virtio/mailbox

Use virtio/mailbox to build connection between Remote Proccessors
and Linux. Add work queue to handle incoming messages.

Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Mathieu Poirier <mathieu.poirer@linaro.org>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/1615029865-23312-11-git-send-email-peng.fan@oss.nxp.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/imx_rproc.c | 116 +++++++++++++++++++++++++++++++++++++++--
 1 file changed, 113 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 3685bbd135b0..5ebb9f57d3e0 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -7,6 +7,7 @@
 #include <linux/err.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
+#include <linux/mailbox_client.h>
 #include <linux/mfd/syscon.h>
 #include <linux/module.h>
 #include <linux/of_address.h>
@@ -15,6 +16,9 @@
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/remoteproc.h>
+#include <linux/workqueue.h>
+
+#include "remoteproc_internal.h"
 
 #define IMX7D_SRC_SCR			0x0C
 #define IMX7D_ENABLE_M4			BIT(3)
@@ -86,6 +90,11 @@ struct imx_rproc {
 	const struct imx_rproc_dcfg	*dcfg;
 	struct imx_rproc_mem		mem[IMX7D_RPROC_MEM_MAX];
 	struct clk			*clk;
+	struct mbox_client		cl;
+	struct mbox_chan		*tx_ch;
+	struct mbox_chan		*rx_ch;
+	struct work_struct		rproc_work;
+	struct workqueue_struct		*workqueue;
 };
 
 static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
@@ -366,9 +375,33 @@ static int imx_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
 	return 0;
 }
 
+static void imx_rproc_kick(struct rproc *rproc, int vqid)
+{
+	struct imx_rproc *priv = rproc->priv;
+	int err;
+	__u32 mmsg;
+
+	if (!priv->tx_ch) {
+		dev_err(priv->dev, "No initialized mbox tx channel\n");
+		return;
+	}
+
+	/*
+	 * Send the index of the triggered virtqueue as the mu payload.
+	 * Let remote processor know which virtqueue is used.
+	 */
+	mmsg = vqid << 16;
+
+	err = mbox_send_message(priv->tx_ch, (void *)&mmsg);
+	if (err < 0)
+		dev_err(priv->dev, "%s: failed (%d, err:%d)\n",
+			__func__, vqid, err);
+}
+
 static const struct rproc_ops imx_rproc_ops = {
 	.start		= imx_rproc_start,
 	.stop		= imx_rproc_stop,
+	.kick		= imx_rproc_kick,
 	.da_to_va       = imx_rproc_da_to_va,
 	.load		= rproc_elf_load_segments,
 	.parse_fw	= imx_rproc_parse_fw,
@@ -444,6 +477,66 @@ static int imx_rproc_addr_init(struct imx_rproc *priv,
 	return 0;
 }
 
+static void imx_rproc_vq_work(struct work_struct *work)
+{
+	struct imx_rproc *priv = container_of(work, struct imx_rproc,
+					      rproc_work);
+
+	rproc_vq_interrupt(priv->rproc, 0);
+	rproc_vq_interrupt(priv->rproc, 1);
+}
+
+static void imx_rproc_rx_callback(struct mbox_client *cl, void *msg)
+{
+	struct rproc *rproc = dev_get_drvdata(cl->dev);
+	struct imx_rproc *priv = rproc->priv;
+
+	queue_work(priv->workqueue, &priv->rproc_work);
+}
+
+static int imx_rproc_xtr_mbox_init(struct rproc *rproc)
+{
+	struct imx_rproc *priv = rproc->priv;
+	struct device *dev = priv->dev;
+	struct mbox_client *cl;
+	int ret;
+
+	if (!of_get_property(dev->of_node, "mbox-names", NULL))
+		return 0;
+
+	cl = &priv->cl;
+	cl->dev = dev;
+	cl->tx_block = true;
+	cl->tx_tout = 100;
+	cl->knows_txdone = false;
+	cl->rx_callback = imx_rproc_rx_callback;
+
+	priv->tx_ch = mbox_request_channel_byname(cl, "tx");
+	if (IS_ERR(priv->tx_ch)) {
+		ret = PTR_ERR(priv->tx_ch);
+		return dev_err_probe(cl->dev, ret,
+				     "failed to request tx mailbox channel: %d\n", ret);
+	}
+
+	priv->rx_ch = mbox_request_channel_byname(cl, "rx");
+	if (IS_ERR(priv->rx_ch)) {
+		mbox_free_channel(priv->tx_ch);
+		ret = PTR_ERR(priv->rx_ch);
+		return dev_err_probe(cl->dev, ret,
+				     "failed to request rx mailbox channel: %d\n", ret);
+	}
+
+	return 0;
+}
+
+static void imx_rproc_free_mbox(struct rproc *rproc)
+{
+	struct imx_rproc *priv = rproc->priv;
+
+	mbox_free_channel(priv->tx_ch);
+	mbox_free_channel(priv->rx_ch);
+}
+
 static int imx_rproc_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -481,18 +574,28 @@ static int imx_rproc_probe(struct platform_device *pdev)
 	priv->dev = dev;
 
 	dev_set_drvdata(dev, rproc);
+	priv->workqueue = create_workqueue(dev_name(dev));
+	if (!priv->workqueue) {
+		dev_err(dev, "cannot create workqueue\n");
+		ret = -ENOMEM;
+		goto err_put_rproc;
+	}
+
+	ret = imx_rproc_xtr_mbox_init(rproc);
+	if (ret)
+		goto err_put_wkq;
 
 	ret = imx_rproc_addr_init(priv, pdev);
 	if (ret) {
 		dev_err(dev, "failed on imx_rproc_addr_init\n");
-		goto err_put_rproc;
+		goto err_put_mbox;
 	}
 
 	priv->clk = devm_clk_get(dev, NULL);
 	if (IS_ERR(priv->clk)) {
 		dev_err(dev, "Failed to get clock\n");
 		ret = PTR_ERR(priv->clk);
-		goto err_put_rproc;
+		goto err_put_mbox;
 	}
 
 	/*
@@ -502,9 +605,11 @@ static int imx_rproc_probe(struct platform_device *pdev)
 	ret = clk_prepare_enable(priv->clk);
 	if (ret) {
 		dev_err(&rproc->dev, "Failed to enable clock\n");
-		goto err_put_rproc;
+		goto err_put_mbox;
 	}
 
+	INIT_WORK(&priv->rproc_work, imx_rproc_vq_work);
+
 	ret = rproc_add(rproc);
 	if (ret) {
 		dev_err(dev, "rproc_add failed\n");
@@ -515,6 +620,10 @@ static int imx_rproc_probe(struct platform_device *pdev)
 
 err_put_clk:
 	clk_disable_unprepare(priv->clk);
+err_put_mbox:
+	imx_rproc_free_mbox(rproc);
+err_put_wkq:
+	destroy_workqueue(priv->workqueue);
 err_put_rproc:
 	rproc_free(rproc);
 
@@ -528,6 +637,7 @@ static int imx_rproc_remove(struct platform_device *pdev)
 
 	clk_disable_unprepare(priv->clk);
 	rproc_del(rproc);
+	imx_rproc_free_mbox(rproc);
 	rproc_free(rproc);
 
 	return 0;
-- 
cgit v1.2.3


From 59521c3c4b902b3749103cc7b8e64579317173e9 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Mon, 8 Mar 2021 16:24:46 +0100
Subject: PCI: al: Select CONFIG_PCI_ECAM
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Compile-testing this driver without ECAM support results in a link failure:

  ld.lld: error: undefined symbol: pci_ecam_map_bus
  >>> referenced by pcie-al.c
  >>>               pci/controller/dwc/pcie-al.o:(al_pcie_map_bus) in archive drivers/built-in.a

Select CONFIG_ECAM like the other drivers do.

Link: https://lore.kernel.org/r/20210308152501.2135937-1-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
---
 drivers/pci/controller/dwc/Kconfig | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
index 22c5529e9a65..f4b589f16e74 100644
--- a/drivers/pci/controller/dwc/Kconfig
+++ b/drivers/pci/controller/dwc/Kconfig
@@ -311,6 +311,7 @@ config PCIE_AL
 	depends on OF && (ARM64 || COMPILE_TEST)
 	depends on PCI_MSI_IRQ_DOMAIN
 	select PCIE_DW_HOST
+	select PCI_ECAM
 	help
 	  Say Y here to enable support of the Amazon's Annapurna Labs PCIe
 	  controller IP on Amazon SoCs. The PCIe controller uses the DesignWare
-- 
cgit v1.2.3


From 16f7ae5906dfbeff54f74ec75d0563bb3a87ab0b Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Mon, 8 Mar 2021 16:24:47 +0100
Subject: PCI: thunder: Fix compile testing

Compile-testing these drivers is currently broken. Enabling it causes a
couple of build failures though:

  drivers/pci/controller/pci-thunder-ecam.c:119:30: error: shift count >= width of type [-Werror,-Wshift-count-overflow]
  drivers/pci/controller/pci-thunder-pem.c:54:2: error: implicit declaration of function 'writeq' [-Werror,-Wimplicit-function-declaration]
  drivers/pci/controller/pci-thunder-pem.c:392:8: error: implicit declaration of function 'acpi_get_rc_resources' [-Werror,-Wimplicit-function-declaration]

Fix them with the obvious one-line changes.

Link: https://lore.kernel.org/r/20210308152501.2135937-2-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Reviewed-by: Robert Richter <rric@kernel.org>
---
 drivers/pci/controller/pci-thunder-ecam.c |  2 +-
 drivers/pci/controller/pci-thunder-pem.c  | 13 +++++++------
 drivers/pci/pci.h                         |  6 ++++++
 3 files changed, 14 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pci-thunder-ecam.c b/drivers/pci/controller/pci-thunder-ecam.c
index f964fd26f7e0..ffd84656544f 100644
--- a/drivers/pci/controller/pci-thunder-ecam.c
+++ b/drivers/pci/controller/pci-thunder-ecam.c
@@ -116,7 +116,7 @@ static int thunder_ecam_p2_config_read(struct pci_bus *bus, unsigned int devfn,
 	 * the config space access window.  Since we are working with
 	 * the high-order 32 bits, shift everything down by 32 bits.
 	 */
-	node_bits = (cfg->res.start >> 32) & (1 << 12);
+	node_bits = upper_32_bits(cfg->res.start) & (1 << 12);
 
 	v |= node_bits;
 	set_val(v, where, size, val);
diff --git a/drivers/pci/controller/pci-thunder-pem.c b/drivers/pci/controller/pci-thunder-pem.c
index 1a3f70ac61fc..0660b9da204f 100644
--- a/drivers/pci/controller/pci-thunder-pem.c
+++ b/drivers/pci/controller/pci-thunder-pem.c
@@ -12,6 +12,7 @@
 #include <linux/pci-acpi.h>
 #include <linux/pci-ecam.h>
 #include <linux/platform_device.h>
+#include <linux/io-64-nonatomic-lo-hi.h>
 #include "../pci.h"
 
 #if defined(CONFIG_PCI_HOST_THUNDER_PEM) || (defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS))
@@ -324,9 +325,9 @@ static int thunder_pem_init(struct device *dev, struct pci_config_window *cfg,
 	 * structure here for the BAR.
 	 */
 	bar4_start = res_pem->start + 0xf00000;
-	pem_pci->ea_entry[0] = (u32)bar4_start | 2;
-	pem_pci->ea_entry[1] = (u32)(res_pem->end - bar4_start) & ~3u;
-	pem_pci->ea_entry[2] = (u32)(bar4_start >> 32);
+	pem_pci->ea_entry[0] = lower_32_bits(bar4_start) | 2;
+	pem_pci->ea_entry[1] = lower_32_bits(res_pem->end - bar4_start) & ~3u;
+	pem_pci->ea_entry[2] = upper_32_bits(bar4_start);
 
 	cfg->priv = pem_pci;
 	return 0;
@@ -334,9 +335,9 @@ static int thunder_pem_init(struct device *dev, struct pci_config_window *cfg,
 
 #if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS)
 
-#define PEM_RES_BASE		0x87e0c0000000UL
-#define PEM_NODE_MASK		GENMASK(45, 44)
-#define PEM_INDX_MASK		GENMASK(26, 24)
+#define PEM_RES_BASE		0x87e0c0000000ULL
+#define PEM_NODE_MASK		GENMASK_ULL(45, 44)
+#define PEM_INDX_MASK		GENMASK_ULL(26, 24)
 #define PEM_MIN_DOM_IN_NODE	4
 #define PEM_MAX_DOM_IN_NODE	10
 
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index ef7c4661314f..9684b468267f 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -624,6 +624,12 @@ static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
 #if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64)
 int acpi_get_rc_resources(struct device *dev, const char *hid, u16 segment,
 			  struct resource *res);
+#else
+static inline int acpi_get_rc_resources(struct device *dev, const char *hid,
+					u16 segment, struct resource *res)
+{
+	return -ENODEV;
+}
 #endif
 
 int pci_rebar_get_current_size(struct pci_dev *pdev, int bar);
-- 
cgit v1.2.3


From 6e5a1fff9096ecd259dedcbbdc812aa90986a40e Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Mon, 8 Mar 2021 16:24:48 +0100
Subject: PCI: Avoid building empty drivers

There are harmless warnings when compile testing the kernel with
CONFIG_TRIM_UNUSED_KSYMS:

  drivers/pci/controller/dwc/pcie-al.o: no symbols
  drivers/pci/controller/pci-thunder-ecam.o: no symbols
  drivers/pci/controller/pci-thunder-pem.o: no symbols

The problem here is that the host drivers get built even when the
configuration symbols are all disabled, as they pretend to not be drivers
but are silently enabled because of the promise that ACPI-based systems
need no drivers.

Add back the normal symbols to have these drivers built, and change the
logic to otherwise only build them when both CONFIG_PCI_QUIRKS and
CONFIG_ACPI are enabled.

As a side-effect, this enables compile-testing the drivers on other
architectures, which in turn needs the acpi_get_rc_resources() function to
be defined.

Link: https://lore.kernel.org/r/20210308152501.2135937-3-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Robert Richter <rric@kernel.org>
---
 drivers/pci/controller/Makefile     | 7 ++++++-
 drivers/pci/controller/dwc/Makefile | 7 ++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile
index e4559f2182f2..6d24a163033f 100644
--- a/drivers/pci/controller/Makefile
+++ b/drivers/pci/controller/Makefile
@@ -11,10 +11,13 @@ obj-$(CONFIG_PCIE_RCAR_HOST) += pcie-rcar.o pcie-rcar-host.o
 obj-$(CONFIG_PCIE_RCAR_EP) += pcie-rcar.o pcie-rcar-ep.o
 obj-$(CONFIG_PCI_HOST_COMMON) += pci-host-common.o
 obj-$(CONFIG_PCI_HOST_GENERIC) += pci-host-generic.o
+obj-$(CONFIG_PCI_HOST_THUNDER_ECAM) += pci-thunder-ecam.o
+obj-$(CONFIG_PCI_HOST_THUNDER_PEM) += pci-thunder-pem.o
 obj-$(CONFIG_PCIE_XILINX) += pcie-xilinx.o
 obj-$(CONFIG_PCIE_XILINX_NWL) += pcie-xilinx-nwl.o
 obj-$(CONFIG_PCIE_XILINX_CPM) += pcie-xilinx-cpm.o
 obj-$(CONFIG_PCI_V3_SEMI) += pci-v3-semi.o
+obj-$(CONFIG_PCI_XGENE) += pci-xgene.o
 obj-$(CONFIG_PCI_XGENE_MSI) += pci-xgene-msi.o
 obj-$(CONFIG_PCI_VERSATILE) += pci-versatile.o
 obj-$(CONFIG_PCIE_IPROC) += pcie-iproc.o
@@ -47,8 +50,10 @@ obj-y				+= mobiveil/
 # ARM64 and use internal ifdefs to only build the pieces we need
 # depending on whether ACPI, the DT driver, or both are enabled.
 
-ifdef CONFIG_PCI
+ifdef CONFIG_ACPI
+ifdef CONFIG_PCI_QUIRKS
 obj-$(CONFIG_ARM64) += pci-thunder-ecam.o
 obj-$(CONFIG_ARM64) += pci-thunder-pem.o
 obj-$(CONFIG_ARM64) += pci-xgene.o
 endif
+endif
diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
index a751553fa0db..ba7c42f6df6f 100644
--- a/drivers/pci/controller/dwc/Makefile
+++ b/drivers/pci/controller/dwc/Makefile
@@ -31,7 +31,12 @@ obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
 # ARM64 and use internal ifdefs to only build the pieces we need
 # depending on whether ACPI, the DT driver, or both are enabled.
 
-ifdef CONFIG_PCI
+obj-$(CONFIG_PCIE_AL) += pcie-al.o
+obj-$(CONFIG_PCI_HISI) += pcie-hisi.o
+
+ifdef CONFIG_ACPI
+ifdef CONFIG_PCI_QUIRKS
 obj-$(CONFIG_ARM64) += pcie-al.o
 obj-$(CONFIG_ARM64) += pcie-hisi.o
 endif
+endif
-- 
cgit v1.2.3


From 43395d9e091220695d2503fccc6f4fc9785d1bee Mon Sep 17 00:00:00 2001
From: Krzysztof Wilczyński <kw@linux.com>
Date: Thu, 11 Mar 2021 00:17:17 +0000
Subject: PCI: Fix kernel-doc errors
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fix kernel-doc formatting errors, function names that don't match the doc,
and some missing parameter documentation.  These are reported by:

  make W=1 drivers/pci/

No functional change intended.

[bhelgaas: squashed into one patch since this only changes comments]
Link: https://lore.kernel.org/r/20210311001724.423356-1-kw@linux.com
Link: https://lore.kernel.org/r/20210311001724.423356-2-kw@linux.com
Link: https://lore.kernel.org/r/20210311001724.423356-3-kw@linux.com
Link: https://lore.kernel.org/r/20210311001724.423356-4-kw@linux.com
Link: https://lore.kernel.org/r/20210311001724.423356-5-kw@linux.com
Link: https://lore.kernel.org/r/20210311001724.423356-6-kw@linux.com
Link: https://lore.kernel.org/r/20210311001724.423356-7-kw@linux.com
Link: https://lore.kernel.org/r/20210311001724.423356-8-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/ats.c                             |  2 +-
 drivers/pci/controller/cadence/pci-j721e.c    |  2 +-
 drivers/pci/controller/dwc/pci-keystone.c     | 11 ++++++++---
 drivers/pci/endpoint/functions/pci-epf-ntb.c  | 16 +++++++++++-----
 drivers/pci/endpoint/functions/pci-epf-test.c |  2 +-
 drivers/pci/endpoint/pci-epc-core.c           |  2 ++
 drivers/pci/hotplug/acpi_pcihp.c              |  2 +-
 drivers/pci/of.c                              | 22 ++++++++++++++++++----
 drivers/pci/pcie/aer.c                        |  6 +++---
 drivers/pci/pcie/pme.c                        |  2 +-
 10 files changed, 47 insertions(+), 20 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/ats.c b/drivers/pci/ats.c
index 0d3719407b8b..6d7d64939f82 100644
--- a/drivers/pci/ats.c
+++ b/drivers/pci/ats.c
@@ -480,7 +480,7 @@ EXPORT_SYMBOL_GPL(pci_pasid_features);
 #define PASID_NUMBER_SHIFT	8
 #define PASID_NUMBER_MASK	(0x1f << PASID_NUMBER_SHIFT)
 /**
- * pci_max_pasid - Get maximum number of PASIDs supported by device
+ * pci_max_pasids - Get maximum number of PASIDs supported by device
  * @pdev: PCI device structure
  *
  * Returns negative value when PASID capability is not present.
diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c
index 849f1e416ea5..f1eef67e9526 100644
--- a/drivers/pci/controller/cadence/pci-j721e.c
+++ b/drivers/pci/controller/cadence/pci-j721e.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/**
+/*
  * pci-j721e - PCIe controller driver for TI's J721E SoCs
  *
  * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com
diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 53aa35cb3a49..6745e69b7020 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -346,8 +346,9 @@ static const struct irq_domain_ops ks_pcie_legacy_irq_domain_ops = {
 };
 
 /**
- * ks_pcie_set_dbi_mode() - Set DBI mode to access overlaid BAR mask
- * registers
+ * ks_pcie_set_dbi_mode() - Set DBI mode to access overlaid BAR mask registers
+ * @ks_pcie: A pointer to the keystone_pcie structure which holds the KeyStone
+ *	     PCIe host controller driver information.
  *
  * Since modification of dbi_cs2 involves different clock domain, read the
  * status back to ensure the transition is complete.
@@ -367,6 +368,8 @@ static void ks_pcie_set_dbi_mode(struct keystone_pcie *ks_pcie)
 
 /**
  * ks_pcie_clear_dbi_mode() - Disable DBI mode
+ * @ks_pcie: A pointer to the keystone_pcie structure which holds the KeyStone
+ *	     PCIe host controller driver information.
  *
  * Since modification of dbi_cs2 involves different clock domain, read the
  * status back to ensure the transition is complete.
@@ -449,6 +452,7 @@ static struct pci_ops ks_child_pcie_ops = {
 
 /**
  * ks_pcie_v3_65_add_bus() - keystone add_bus post initialization
+ * @bus: A pointer to the PCI bus structure.
  *
  * This sets BAR0 to enable inbound access for MSI_IRQ register
  */
@@ -488,6 +492,8 @@ static struct pci_ops ks_pcie_ops = {
 
 /**
  * ks_pcie_link_up() - Check if link up
+ * @pci: A pointer to the dw_pcie structure which holds the DesignWare PCIe host
+ *	 controller driver information.
  */
 static int ks_pcie_link_up(struct dw_pcie *pci)
 {
@@ -605,7 +611,6 @@ static void ks_pcie_msi_irq_handler(struct irq_desc *desc)
 
 /**
  * ks_pcie_legacy_irq_handler() - Handle legacy interrupt
- * @irq: IRQ line for legacy interrupts
  * @desc: Pointer to irq descriptor
  *
  * Traverse through pending legacy interrupts and invoke handler for each. Also
diff --git a/drivers/pci/endpoint/functions/pci-epf-ntb.c b/drivers/pci/endpoint/functions/pci-epf-ntb.c
index 338148cf56f5..bce274d02dcf 100644
--- a/drivers/pci/endpoint/functions/pci-epf-ntb.c
+++ b/drivers/pci/endpoint/functions/pci-epf-ntb.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/**
+/*
  * Endpoint Function Driver to implement Non-Transparent Bridge functionality
  *
  * Copyright (C) 2020 Texas Instruments
@@ -696,7 +696,8 @@ reset_handler:
 
 /**
  * epf_ntb_peer_spad_bar_clear() - Clear Peer Scratchpad BAR
- * @ntb: NTB device that facilitates communication between HOST1 and HOST2
+ * @ntb_epc: EPC associated with one of the HOST which holds peer's outbound
+ *	     address.
  *
  *+-----------------+------->+------------------+        +-----------------+
  *|       BAR0      |        |  CONFIG REGION   |        |       BAR0      |
@@ -740,6 +741,7 @@ static void epf_ntb_peer_spad_bar_clear(struct epf_ntb_epc *ntb_epc)
 /**
  * epf_ntb_peer_spad_bar_set() - Set peer scratchpad BAR
  * @ntb: NTB device that facilitates communication between HOST1 and HOST2
+ * @type: PRIMARY interface or SECONDARY interface
  *
  *+-----------------+------->+------------------+        +-----------------+
  *|       BAR0      |        |  CONFIG REGION   |        |       BAR0      |
@@ -808,7 +810,8 @@ static int epf_ntb_peer_spad_bar_set(struct epf_ntb *ntb,
 
 /**
  * epf_ntb_config_sspad_bar_clear() - Clear Config + Self scratchpad BAR
- * @ntb: NTB device that facilitates communication between HOST1 and HOST2
+ * @ntb_epc: EPC associated with one of the HOST which holds peer's outbound
+ *	     address.
  *
  * +-----------------+------->+------------------+        +-----------------+
  * |       BAR0      |        |  CONFIG REGION   |        |       BAR0      |
@@ -851,7 +854,8 @@ static void epf_ntb_config_sspad_bar_clear(struct epf_ntb_epc *ntb_epc)
 
 /**
  * epf_ntb_config_sspad_bar_set() - Set Config + Self scratchpad BAR
- * @ntb: NTB device that facilitates communication between HOST1 and HOST2
+ * @ntb_epc: EPC associated with one of the HOST which holds peer's outbound
+ *	     address.
  *
  * +-----------------+------->+------------------+        +-----------------+
  * |       BAR0      |        |  CONFIG REGION   |        |       BAR0      |
@@ -1312,6 +1316,7 @@ static int epf_ntb_configure_interrupt(struct epf_ntb *ntb,
 
 /**
  * epf_ntb_alloc_peer_mem() - Allocate memory in peer's outbound address space
+ * @dev: The PCI device.
  * @ntb_epc: EPC associated with one of the HOST whose BAR holds peer's outbound
  *   address
  * @bar: BAR of @ntb_epc in for which memory has to be allocated (could be
@@ -1660,7 +1665,6 @@ static int epf_ntb_init_epc_bar_interface(struct epf_ntb *ntb,
  * epf_ntb_init_epc_bar() - Identify BARs to be used for each of the NTB
  * constructs (scratchpad region, doorbell, memorywindow)
  * @ntb: NTB device that facilitates communication between HOST1 and HOST2
- * @type: PRIMARY interface or SECONDARY interface
  *
  * Wrapper to epf_ntb_init_epc_bar_interface() to identify the free BARs
  * to be used for each of BAR_CONFIG, BAR_PEER_SPAD, BAR_DB_MW1, BAR_MW2,
@@ -2037,6 +2041,8 @@ static const struct config_item_type ntb_group_type = {
 /**
  * epf_ntb_add_cfs() - Add configfs directory specific to NTB
  * @epf: NTB endpoint function device
+ * @group: A pointer to the config_group structure referencing a group of
+ *	   config_items of a specific type that belong to a specific sub-system.
  *
  * Add configfs directory specific to NTB. This directory will hold
  * NTB specific properties like db_count, spad_count, num_mws etc.,
diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index c0ac4e9cbe72..63d5f5c6e3e0 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/**
+/*
  * Test driver to test endpoint functionality
  *
  * Copyright (C) 2017 Texas Instruments
diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c
index cc8f9eb2b177..adec9bee72cf 100644
--- a/drivers/pci/endpoint/pci-epc-core.c
+++ b/drivers/pci/endpoint/pci-epc-core.c
@@ -594,6 +594,8 @@ EXPORT_SYMBOL_GPL(pci_epc_add_epf);
  * pci_epc_remove_epf() - remove PCI endpoint function from endpoint controller
  * @epc: the EPC device from which the endpoint function should be removed
  * @epf: the endpoint function to be removed
+ * @type: identifies if the EPC is connected to the primary or secondary
+ *        interface of EPF
  *
  * Invoke to remove PCI endpoint function from the endpoint controller.
  */
diff --git a/drivers/pci/hotplug/acpi_pcihp.c b/drivers/pci/hotplug/acpi_pcihp.c
index 2750a64cecd3..4fedebf2f8c1 100644
--- a/drivers/pci/hotplug/acpi_pcihp.c
+++ b/drivers/pci/hotplug/acpi_pcihp.c
@@ -157,7 +157,7 @@ static int pcihp_is_ejectable(acpi_handle handle)
 }
 
 /**
- * acpi_pcihp_check_ejectable - check if handle is ejectable ACPI PCI slot
+ * acpi_pci_check_ejectable - check if handle is ejectable ACPI PCI slot
  * @pbus: the PCI bus of the PCI slot corresponding to 'handle'
  * @handle: ACPI handle to check
  *
diff --git a/drivers/pci/of.c b/drivers/pci/of.c
index 5ea472ae22ac..da5b414d585a 100644
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -190,10 +190,18 @@ int of_pci_parse_bus_range(struct device_node *node, struct resource *res)
 EXPORT_SYMBOL_GPL(of_pci_parse_bus_range);
 
 /**
- * This function will try to obtain the host bridge domain number by
- * finding a property called "linux,pci-domain" of the given device node.
+ * of_get_pci_domain_nr - Find the host bridge domain number
+ *			  of the given device node.
+ * @node: Device tree node with the domain information.
  *
- * @node: device tree node with the domain information
+ * This function will try to obtain the host bridge domain number by finding
+ * a property called "linux,pci-domain" of the given device node.
+ *
+ * Return:
+ * * > 0	- On success, an associated domain number.
+ * * -EINVAL	- The property "linux,pci-domain" does not exist.
+ * * -ENODATA	- The linux,pci-domain" property does not have value.
+ * * -EOVERFLOW	- Invalid "linux,pci-domain" property value.
  *
  * Returns the associated domain number from DT in the range [0-0xffff], or
  * a negative value if the required property is not found.
@@ -585,10 +593,16 @@ int devm_of_pci_bridge_init(struct device *dev, struct pci_host_bridge *bridge)
 #endif /* CONFIG_PCI */
 
 /**
+ * of_pci_get_max_link_speed - Find the maximum link speed of the given device node.
+ * @node: Device tree node with the maximum link speed information.
+ *
  * This function will try to find the limitation of link speed by finding
  * a property called "max-link-speed" of the given device node.
  *
- * @node: device tree node with the max link speed information
+ * Return:
+ * * > 0	- On success, a maximum link speed.
+ * * -EINVAL	- Invalid "max-link-speed" property value, or failure to access
+ *		  the property of the device tree node.
  *
  * Returns the associated max link speed from DT, or a negative value if the
  * required property is not found or is invalid.
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index ba22388342d1..ec943cee5ecc 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -129,7 +129,7 @@ static const char * const ecrc_policy_str[] = {
 };
 
 /**
- * enable_ercr_checking - enable PCIe ECRC checking for a device
+ * enable_ecrc_checking - enable PCIe ECRC checking for a device
  * @dev: the PCI device
  *
  * Returns 0 on success, or negative on failure.
@@ -153,7 +153,7 @@ static int enable_ecrc_checking(struct pci_dev *dev)
 }
 
 /**
- * disable_ercr_checking - disables PCIe ECRC checking for a device
+ * disable_ecrc_checking - disables PCIe ECRC checking for a device
  * @dev: the PCI device
  *
  * Returns 0 on success, or negative on failure.
@@ -1442,7 +1442,7 @@ static struct pcie_port_service_driver aerdriver = {
 };
 
 /**
- * aer_service_init - register AER root service driver
+ * pcie_aer_init - register AER root service driver
  *
  * Invoked when AER root service driver is loaded.
  */
diff --git a/drivers/pci/pcie/pme.c b/drivers/pci/pcie/pme.c
index 3fc08488d65f..1d0dd77fed3a 100644
--- a/drivers/pci/pcie/pme.c
+++ b/drivers/pci/pcie/pme.c
@@ -463,7 +463,7 @@ static struct pcie_port_service_driver pcie_pme_driver = {
 };
 
 /**
- * pcie_pme_service_init - Register the PCIe PME service driver.
+ * pcie_pme_init - Register the PCIe PME service driver.
  */
 int __init pcie_pme_init(void)
 {
-- 
cgit v1.2.3


From 18cda8018a4b5f4819e02ad2cabf40c3666c6366 Mon Sep 17 00:00:00 2001
From: Wei Yongjun <weiyongjun1@huawei.com>
Date: Fri, 12 Mar 2021 08:04:20 +0000
Subject: remoteproc: imx_rproc: fix return value check in
 imx_rproc_addr_init()

In case of error, the function devm_ioremap() returns NULL pointer
not ERR_PTR(). The IS_ERR() test in the return value check should
be replaced with NULL test.

Fixes: ecadcc47492c ("remoteproc: imx_rproc: use devm_ioremap")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20210312080420.277151-1-weiyongjun1@huawei.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/imx_rproc.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 5ebb9f57d3e0..6d3207ccbaef 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -464,10 +464,9 @@ static int imx_rproc_addr_init(struct imx_rproc *priv,
 
 		/* Not use resource version, because we might share region */
 		priv->mem[b].cpu_addr = devm_ioremap(&pdev->dev, res.start, resource_size(&res));
-		if (IS_ERR(priv->mem[b].cpu_addr)) {
+		if (!priv->mem[b].cpu_addr) {
 			dev_err(dev, "failed to remap %pr\n", &res);
-			err = PTR_ERR(priv->mem[b].cpu_addr);
-			return err;
+			return -ENOMEM;
 		}
 		priv->mem[b].sys_addr = res.start;
 		priv->mem[b].size = resource_size(&res);
-- 
cgit v1.2.3


From 58483761810087e5ffdf36e84ac1bf26df909097 Mon Sep 17 00:00:00 2001
From: Daniel Lezcano <daniel.lezcano@linaro.org>
Date: Sun, 14 Mar 2021 12:13:29 +0100
Subject: thermal/drivers/core: Use a char pointer for the cooling device name

We want to have any kind of name for the cooling devices as we do no
longer want to rely on auto-numbering. Let's replace the cooling
device's fixed array by a char pointer to be allocated dynamically
when registering the cooling device, so we don't limit the length of
the name.

Rework the error path at the same time as we have to rollback the
allocations in case of error.

Tested with a dummy device having the name:
 "Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch"

A village on the island of Anglesey (Wales), known to have the longest
name in Europe.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Tested-by: Ido Schimmel <idosch@nvidia.com>
Link: https://lore.kernel.org/r/20210314111333.16551-1-daniel.lezcano@linaro.org
---
 drivers/net/ethernet/mellanox/mlxsw/core_thermal.c |  2 +-
 drivers/thermal/thermal_core.c                     | 38 +++++++++++++---------
 include/linux/thermal.h                            |  2 +-
 3 files changed, 24 insertions(+), 18 deletions(-)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
index bf85ce9835d7..7447c2a73cbd 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
@@ -141,7 +141,7 @@ static int mlxsw_get_cooling_device_idx(struct mlxsw_thermal *thermal,
 	/* Allow mlxsw thermal zone binding to an external cooling device */
 	for (i = 0; i < ARRAY_SIZE(mlxsw_thermal_external_allowed_cdev); i++) {
 		if (strnstr(cdev->type, mlxsw_thermal_external_allowed_cdev[i],
-			    sizeof(cdev->type)))
+			    strlen(cdev->type)))
 			return 0;
 	}
 
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 996c038f83a4..c8d4010940ef 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -960,10 +960,7 @@ __thermal_cooling_device_register(struct device_node *np,
 {
 	struct thermal_cooling_device *cdev;
 	struct thermal_zone_device *pos = NULL;
-	int result;
-
-	if (type && strlen(type) >= THERMAL_NAME_LENGTH)
-		return ERR_PTR(-EINVAL);
+	int ret;
 
 	if (!ops || !ops->get_max_state || !ops->get_cur_state ||
 	    !ops->set_cur_state)
@@ -973,14 +970,17 @@ __thermal_cooling_device_register(struct device_node *np,
 	if (!cdev)
 		return ERR_PTR(-ENOMEM);
 
-	result = ida_simple_get(&thermal_cdev_ida, 0, 0, GFP_KERNEL);
-	if (result < 0) {
-		kfree(cdev);
-		return ERR_PTR(result);
+	ret = ida_simple_get(&thermal_cdev_ida, 0, 0, GFP_KERNEL);
+	if (ret < 0)
+		goto out_kfree_cdev;
+	cdev->id = ret;
+
+	cdev->type = kstrdup(type ? type : "", GFP_KERNEL);
+	if (!cdev->type) {
+		ret = -ENOMEM;
+		goto out_ida_remove;
 	}
 
-	cdev->id = result;
-	strlcpy(cdev->type, type ? : "", sizeof(cdev->type));
 	mutex_init(&cdev->lock);
 	INIT_LIST_HEAD(&cdev->thermal_instances);
 	cdev->np = np;
@@ -990,12 +990,9 @@ __thermal_cooling_device_register(struct device_node *np,
 	cdev->devdata = devdata;
 	thermal_cooling_device_setup_sysfs(cdev);
 	dev_set_name(&cdev->device, "cooling_device%d", cdev->id);
-	result = device_register(&cdev->device);
-	if (result) {
-		ida_simple_remove(&thermal_cdev_ida, cdev->id);
-		put_device(&cdev->device);
-		return ERR_PTR(result);
-	}
+	ret = device_register(&cdev->device);
+	if (ret)
+		goto out_kfree_type;
 
 	/* Add 'this' new cdev to the global cdev list */
 	mutex_lock(&thermal_list_lock);
@@ -1013,6 +1010,14 @@ __thermal_cooling_device_register(struct device_node *np,
 	mutex_unlock(&thermal_list_lock);
 
 	return cdev;
+
+out_kfree_type:
+	kfree(cdev->type);
+	put_device(&cdev->device);
+out_ida_remove:
+	ida_simple_remove(&thermal_cdev_ida, cdev->id);
+out_kfree_cdev:
+	return ERR_PTR(ret);
 }
 
 /**
@@ -1171,6 +1176,7 @@ void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev)
 	ida_simple_remove(&thermal_cdev_ida, cdev->id);
 	device_del(&cdev->device);
 	thermal_cooling_device_destroy_sysfs(cdev);
+	kfree(cdev->type);
 	put_device(&cdev->device);
 }
 EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister);
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 6ac7bb1d2b1f..169502164364 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -91,7 +91,7 @@ struct thermal_cooling_device_ops {
 
 struct thermal_cooling_device {
 	int id;
-	char type[THERMAL_NAME_LENGTH];
+	char *type;
 	struct device device;
 	struct device_node *np;
 	void *devdata;
-- 
cgit v1.2.3


From ef37d1f9acb57b7a5993e93ae582ba5f4108919e Mon Sep 17 00:00:00 2001
From: Daniel Lezcano <daniel.lezcano@linaro.org>
Date: Sun, 14 Mar 2021 12:13:30 +0100
Subject: thermal/drivers/cpufreq_cooling: Use device name instead of
 auto-numbering

Currently the naming of a cooling device is just a cooling technique
followed by a number. When there are multiple cooling devices using
the same technique, it is impossible to clearly identify the related
device as this one is just a number.

For instance:

 thermal-cpufreq-0
 thermal-cpufreq-1
 etc ...

The 'thermal' prefix is redundant with the subsystem namespace. This
patch removes the 'thermal' prefix and changes the number by the device
name. So the naming above becomes:

 cpufreq-cpu0
 cpufreq-cpu4
 etc ...

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://lore.kernel.org/r/20210314111333.16551-2-daniel.lezcano@linaro.org
---
 drivers/thermal/cpufreq_cooling.c | 34 ++++++++++++----------------------
 1 file changed, 12 insertions(+), 22 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/cpufreq_cooling.c b/drivers/thermal/cpufreq_cooling.c
index 10af3341e5ea..3f5f1dce1320 100644
--- a/drivers/thermal/cpufreq_cooling.c
+++ b/drivers/thermal/cpufreq_cooling.c
@@ -13,10 +13,10 @@
 #include <linux/cpu.h>
 #include <linux/cpufreq.h>
 #include <linux/cpu_cooling.h>
+#include <linux/device.h>
 #include <linux/energy_model.h>
 #include <linux/err.h>
 #include <linux/export.h>
-#include <linux/idr.h>
 #include <linux/pm_opp.h>
 #include <linux/pm_qos.h>
 #include <linux/slab.h>
@@ -50,8 +50,6 @@ struct time_in_idle {
 
 /**
  * struct cpufreq_cooling_device - data for cooling device with cpufreq
- * @id: unique integer value corresponding to each cpufreq_cooling_device
- *	registered.
  * @last_load: load measured by the latest call to cpufreq_get_requested_power()
  * @cpufreq_state: integer value representing the current state of cpufreq
  *	cooling	devices.
@@ -69,7 +67,6 @@ struct time_in_idle {
  * cpufreq_cooling_device.
  */
 struct cpufreq_cooling_device {
-	int id;
 	u32 last_load;
 	unsigned int cpufreq_state;
 	unsigned int max_level;
@@ -82,7 +79,6 @@ struct cpufreq_cooling_device {
 	struct freq_qos_request qos_req;
 };
 
-static DEFINE_IDA(cpufreq_ida);
 static DEFINE_MUTEX(cooling_list_lock);
 static LIST_HEAD(cpufreq_cdev_list);
 
@@ -528,11 +524,11 @@ __cpufreq_cooling_register(struct device_node *np,
 {
 	struct thermal_cooling_device *cdev;
 	struct cpufreq_cooling_device *cpufreq_cdev;
-	char dev_name[THERMAL_NAME_LENGTH];
 	unsigned int i;
 	struct device *dev;
 	int ret;
 	struct thermal_cooling_device_ops *cooling_ops;
+	char *name;
 
 	dev = get_cpu_device(policy->cpu);
 	if (unlikely(!dev)) {
@@ -567,16 +563,6 @@ __cpufreq_cooling_register(struct device_node *np,
 	/* max_level is an index, not a counter */
 	cpufreq_cdev->max_level = i - 1;
 
-	ret = ida_simple_get(&cpufreq_ida, 0, 0, GFP_KERNEL);
-	if (ret < 0) {
-		cdev = ERR_PTR(ret);
-		goto free_idle_time;
-	}
-	cpufreq_cdev->id = ret;
-
-	snprintf(dev_name, sizeof(dev_name), "thermal-cpufreq-%d",
-		 cpufreq_cdev->id);
-
 	cooling_ops = &cpufreq_cooling_ops;
 
 #ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR
@@ -591,7 +577,7 @@ __cpufreq_cooling_register(struct device_node *np,
 		pr_err("%s: unsorted frequency tables are not supported\n",
 		       __func__);
 		cdev = ERR_PTR(-EINVAL);
-		goto remove_ida;
+		goto free_idle_time;
 	}
 
 	ret = freq_qos_add_request(&policy->constraints,
@@ -601,11 +587,18 @@ __cpufreq_cooling_register(struct device_node *np,
 		pr_err("%s: Failed to add freq constraint (%d)\n", __func__,
 		       ret);
 		cdev = ERR_PTR(ret);
-		goto remove_ida;
+		goto free_idle_time;
 	}
 
-	cdev = thermal_of_cooling_device_register(np, dev_name, cpufreq_cdev,
+	cdev = ERR_PTR(-ENOMEM);
+	name = kasprintf(GFP_KERNEL, "cpufreq-%s", dev_name(dev));
+	if (!name)
+		goto remove_qos_req;
+
+	cdev = thermal_of_cooling_device_register(np, name, cpufreq_cdev,
 						  cooling_ops);
+	kfree(name);
+
 	if (IS_ERR(cdev))
 		goto remove_qos_req;
 
@@ -617,8 +610,6 @@ __cpufreq_cooling_register(struct device_node *np,
 
 remove_qos_req:
 	freq_qos_remove_request(&cpufreq_cdev->qos_req);
-remove_ida:
-	ida_simple_remove(&cpufreq_ida, cpufreq_cdev->id);
 free_idle_time:
 	free_idle_time(cpufreq_cdev);
 free_cdev:
@@ -712,7 +703,6 @@ void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
 
 	thermal_cooling_device_unregister(cdev);
 	freq_qos_remove_request(&cpufreq_cdev->qos_req);
-	ida_simple_remove(&cpufreq_ida, cpufreq_cdev->id);
 	free_idle_time(cpufreq_cdev);
 	kfree(cpufreq_cdev);
 }
-- 
cgit v1.2.3


From f8d354e821b268c23a6cd548b7154e55c3954496 Mon Sep 17 00:00:00 2001
From: Daniel Lezcano <daniel.lezcano@linaro.org>
Date: Sun, 14 Mar 2021 12:13:31 +0100
Subject: thermal/drivers/devfreq_cooling: Use device name instead of
 auto-numbering

Currently the naming of a cooling device is just a cooling technique
followed by a number. When there are multiple cooling devices using
the same technique, it is impossible to clearly identify the related
device as this one is just a number.

For instance:

 thermal-devfreq-0
 thermal-devfreq-1
 etc ...

The 'thermal' prefix is redundant with the subsystem namespace. This
patch removes the 'thermal' prefix and changes the number by the device
name. So the naming above becomes:

 devfreq-5000000.gpu
 devfreq-1d84000.ufshc
 etc ...

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://lore.kernel.org/r/20210314111333.16551-3-daniel.lezcano@linaro.org
---
 drivers/thermal/devfreq_cooling.c | 25 ++++++++-----------------
 1 file changed, 8 insertions(+), 17 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/devfreq_cooling.c b/drivers/thermal/devfreq_cooling.c
index fed3121ff2a1..fb250ac16f50 100644
--- a/drivers/thermal/devfreq_cooling.c
+++ b/drivers/thermal/devfreq_cooling.c
@@ -14,7 +14,6 @@
 #include <linux/devfreq_cooling.h>
 #include <linux/energy_model.h>
 #include <linux/export.h>
-#include <linux/idr.h>
 #include <linux/slab.h>
 #include <linux/pm_opp.h>
 #include <linux/pm_qos.h>
@@ -25,11 +24,8 @@
 #define HZ_PER_KHZ		1000
 #define SCALE_ERROR_MITIGATION	100
 
-static DEFINE_IDA(devfreq_ida);
-
 /**
  * struct devfreq_cooling_device - Devfreq cooling device
- * @id:		unique integer value corresponding to each
  *		devfreq_cooling_device registered.
  * @cdev:	Pointer to associated thermal cooling device.
  * @devfreq:	Pointer to associated devfreq device.
@@ -51,7 +47,6 @@ static DEFINE_IDA(devfreq_ida);
  * @em_pd:		Energy Model for the associated Devfreq device
  */
 struct devfreq_cooling_device {
-	int id;
 	struct thermal_cooling_device *cdev;
 	struct devfreq *devfreq;
 	unsigned long cooling_state;
@@ -363,7 +358,7 @@ of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
 	struct thermal_cooling_device *cdev;
 	struct device *dev = df->dev.parent;
 	struct devfreq_cooling_device *dfc;
-	char dev_name[THERMAL_NAME_LENGTH];
+	char *name;
 	int err, num_opps;
 
 	dfc = kzalloc(sizeof(*dfc), GFP_KERNEL);
@@ -407,30 +402,27 @@ of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
 	if (err < 0)
 		goto free_table;
 
-	err = ida_simple_get(&devfreq_ida, 0, 0, GFP_KERNEL);
-	if (err < 0)
+	cdev = ERR_PTR(-ENOMEM);
+	name = kasprintf(GFP_KERNEL, "devfreq-%s", dev_name(dev));
+	if (!name)
 		goto remove_qos_req;
 
-	dfc->id = err;
-
-	snprintf(dev_name, sizeof(dev_name), "thermal-devfreq-%d", dfc->id);
-
-	cdev = thermal_of_cooling_device_register(np, dev_name, dfc,
+	cdev = thermal_of_cooling_device_register(np, name, dfc,
 						  &devfreq_cooling_ops);
+	kfree(name);
+
 	if (IS_ERR(cdev)) {
 		err = PTR_ERR(cdev);
 		dev_err(dev,
 			"Failed to register devfreq cooling device (%d)\n",
 			err);
-		goto release_ida;
+		goto remove_qos_req;
 	}
 
 	dfc->cdev = cdev;
 
 	return cdev;
 
-release_ida:
-	ida_simple_remove(&devfreq_ida, dfc->id);
 remove_qos_req:
 	dev_pm_qos_remove_request(&dfc->req_max_freq);
 free_table:
@@ -527,7 +519,6 @@ void devfreq_cooling_unregister(struct thermal_cooling_device *cdev)
 	dev = dfc->devfreq->dev.parent;
 
 	thermal_cooling_device_unregister(dfc->cdev);
-	ida_simple_remove(&devfreq_ida, dfc->id);
 	dev_pm_qos_remove_request(&dfc->req_max_freq);
 
 	em_dev_unregister_perf_domain(dev);
-- 
cgit v1.2.3


From 6fd1b186d900acf4cef9d3c23ec2839022a46345 Mon Sep 17 00:00:00 2001
From: Daniel Lezcano <daniel.lezcano@linaro.org>
Date: Sun, 14 Mar 2021 12:13:32 +0100
Subject: thermal/drivers/cpuidle_cooling: Use device name instead of
 auto-numbering

Currently the naming of a cooling device is just a cooling technique
followed by a number. When there are multiple cooling devices using
the same technique, it is impossible to clearly identify the related
device as this one is just a number.

For instance:

 thermal-idle-0
 thermal-idle-1
 thermal-idle-2
 thermal-idle-3
 etc ...

The 'thermal' prefix is redundant with the subsystem namespace. This
patch removes the 'thermal prefix and changes the number by the device
name. So the naming above becomes:

 idle-cpu0
 idle-cpu1
 idle-cpu2
 idle-cpu3
 etc ...

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lore.kernel.org/r/20210314111333.16551-4-daniel.lezcano@linaro.org
---
 drivers/thermal/cpuidle_cooling.c | 33 ++++++++++++++++-----------------
 1 file changed, 16 insertions(+), 17 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/cpuidle_cooling.c b/drivers/thermal/cpuidle_cooling.c
index 7ecab4b16b29..f32976163bad 100644
--- a/drivers/thermal/cpuidle_cooling.c
+++ b/drivers/thermal/cpuidle_cooling.c
@@ -9,9 +9,9 @@
 
 #include <linux/cpu_cooling.h>
 #include <linux/cpuidle.h>
+#include <linux/device.h>
 #include <linux/err.h>
 #include <linux/idle_inject.h>
-#include <linux/idr.h>
 #include <linux/of_device.h>
 #include <linux/slab.h>
 #include <linux/thermal.h>
@@ -26,8 +26,6 @@ struct cpuidle_cooling_device {
 	unsigned long state;
 };
 
-static DEFINE_IDA(cpuidle_ida);
-
 /**
  * cpuidle_cooling_runtime - Running time computation
  * @idle_duration_us: CPU idle time to inject in microseconds
@@ -174,10 +172,11 @@ static int __cpuidle_cooling_register(struct device_node *np,
 	struct idle_inject_device *ii_dev;
 	struct cpuidle_cooling_device *idle_cdev;
 	struct thermal_cooling_device *cdev;
+	struct device *dev;
 	unsigned int idle_duration_us = TICK_USEC;
 	unsigned int latency_us = UINT_MAX;
-	char dev_name[THERMAL_NAME_LENGTH];
-	int id, ret;
+	char *name;
+	int ret;
 
 	idle_cdev = kzalloc(sizeof(*idle_cdev), GFP_KERNEL);
 	if (!idle_cdev) {
@@ -185,16 +184,10 @@ static int __cpuidle_cooling_register(struct device_node *np,
 		goto out;
 	}
 
-	id = ida_simple_get(&cpuidle_ida, 0, 0, GFP_KERNEL);
-	if (id < 0) {
-		ret = id;
-		goto out_kfree;
-	}
-
 	ii_dev = idle_inject_register(drv->cpumask);
 	if (!ii_dev) {
 		ret = -EINVAL;
-		goto out_id;
+		goto out_kfree;
 	}
 
 	of_property_read_u32(np, "duration-us", &idle_duration_us);
@@ -205,24 +198,30 @@ static int __cpuidle_cooling_register(struct device_node *np,
 
 	idle_cdev->ii_dev = ii_dev;
 
-	snprintf(dev_name, sizeof(dev_name), "thermal-idle-%d", id);
+	dev = get_cpu_device(cpumask_first(drv->cpumask));
 
-	cdev = thermal_of_cooling_device_register(np, dev_name, idle_cdev,
+	name = kasprintf(GFP_KERNEL, "idle-%s", dev_name(dev));
+	if (!name) {
+		ret = -ENOMEM;
+		goto out_unregister;
+	}
+
+	cdev = thermal_of_cooling_device_register(np, name, idle_cdev,
 						  &cpuidle_cooling_ops);
+	kfree(name);
+
 	if (IS_ERR(cdev)) {
 		ret = PTR_ERR(cdev);
 		goto out_unregister;
 	}
 
 	pr_debug("%s: Idle injection set with idle duration=%u, latency=%u\n",
-		 dev_name, idle_duration_us, latency_us);
+		 name, idle_duration_us, latency_us);
 
 	return 0;
 
 out_unregister:
 	idle_inject_unregister(ii_dev);
-out_id:
-	ida_simple_remove(&cpuidle_ida, id);
 out_kfree:
 	kfree(idle_cdev);
 out:
-- 
cgit v1.2.3


From 87602aeb8ad5bb1b2e23285a9d1322ac033f86c9 Mon Sep 17 00:00:00 2001
From: Daniel Lezcano <daniel.lezcano@linaro.org>
Date: Sun, 14 Mar 2021 12:13:33 +0100
Subject: thermal/drivers/cpufreq_cooling: Remove unused list

There is a list with the purpose of grouping the cpufreq cooling
device together as described in the comments but actually it is
unused, the code evolved since 2012 and the list was no longer needed.

Delete the remaining unused list related code.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://lore.kernel.org/r/20210314111333.16551-5-daniel.lezcano@linaro.org
---
 drivers/thermal/cpufreq_cooling.c | 13 -------------
 1 file changed, 13 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/cpufreq_cooling.c b/drivers/thermal/cpufreq_cooling.c
index 3f5f1dce1320..f3d308427665 100644
--- a/drivers/thermal/cpufreq_cooling.c
+++ b/drivers/thermal/cpufreq_cooling.c
@@ -59,7 +59,6 @@ struct time_in_idle {
  * @cdev: thermal_cooling_device pointer to keep track of the
  *	registered cooling device.
  * @policy: cpufreq policy.
- * @node: list_head to link all cpufreq_cooling_device together.
  * @idle_time: idle time stats
  * @qos_req: PM QoS contraint to apply
  *
@@ -72,16 +71,12 @@ struct cpufreq_cooling_device {
 	unsigned int max_level;
 	struct em_perf_domain *em;
 	struct cpufreq_policy *policy;
-	struct list_head node;
 #ifndef CONFIG_SMP
 	struct time_in_idle *idle_time;
 #endif
 	struct freq_qos_request qos_req;
 };
 
-static DEFINE_MUTEX(cooling_list_lock);
-static LIST_HEAD(cpufreq_cdev_list);
-
 #ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR
 /**
  * get_level: Find the level for a particular frequency
@@ -602,10 +597,6 @@ __cpufreq_cooling_register(struct device_node *np,
 	if (IS_ERR(cdev))
 		goto remove_qos_req;
 
-	mutex_lock(&cooling_list_lock);
-	list_add(&cpufreq_cdev->node, &cpufreq_cdev_list);
-	mutex_unlock(&cooling_list_lock);
-
 	return cdev;
 
 remove_qos_req:
@@ -697,10 +688,6 @@ void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
 
 	cpufreq_cdev = cdev->devdata;
 
-	mutex_lock(&cooling_list_lock);
-	list_del(&cpufreq_cdev->node);
-	mutex_unlock(&cooling_list_lock);
-
 	thermal_cooling_device_unregister(cdev);
 	freq_qos_remove_request(&cpufreq_cdev->qos_req);
 	free_idle_time(cpufreq_cdev);
-- 
cgit v1.2.3


From cd2b4f14edaba60f4f8d429d46e3636202a30f5e Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Mon, 1 Mar 2021 18:38:47 +0100
Subject: pcmcia: ds: Remove if with always false condition
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

pcmcia_device_remove() is only ever called by the driver core with
dev->driver pointing to a valid driver.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
[linux@dominikbrodowski.net: shorten commit message, fix reference
 to pcmcia_device_probe]
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
---
 drivers/pcmcia/ds.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index 72114907c0e4..6ecb64140f37 100644
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -371,9 +371,6 @@ static int pcmcia_device_remove(struct device *dev)
 		pcmcia_card_remove(p_dev->socket, p_dev);
 
 	/* detach the "instance" */
-	if (!p_drv)
-		return 0;
-
 	if (p_drv->remove)
 		p_drv->remove(p_dev);
 
@@ -389,7 +386,7 @@ static int pcmcia_device_remove(struct device *dev)
 				 "pcmcia: driver %s did not release window properly\n",
 				 p_drv->name);
 
-	/* references from pcmcia_probe_device */
+	/* references from pcmcia_device_probe */
 	pcmcia_put_dev(p_dev);
 	module_put(p_drv->owner);
 
-- 
cgit v1.2.3


From f20a7596a0c13947405e961a8adb77abeddc989f Mon Sep 17 00:00:00 2001
From: Lee Jones <lee.jones@linaro.org>
Date: Fri, 12 Mar 2021 11:02:34 +0000
Subject: pcmcia: rsrc_nonstatic: Demote kernel-doc abuses

Fixes the following W=1 kernel build warning(s):

 drivers/pcmcia/rsrc_nonstatic.c:265: warning: Function parameter or member 's' not described in 'readable'
 drivers/pcmcia/rsrc_nonstatic.c:265: warning: Function parameter or member 'res' not described in 'readable'
 drivers/pcmcia/rsrc_nonstatic.c:265: warning: Function parameter or member 'count' not described in 'readable'
 drivers/pcmcia/rsrc_nonstatic.c:296: warning: Function parameter or member 's' not described in 'checksum'
 drivers/pcmcia/rsrc_nonstatic.c:296: warning: Function parameter or member 'res' not described in 'checksum'
 drivers/pcmcia/rsrc_nonstatic.c:296: warning: Function parameter or member 'value' not described in 'checksum'
 drivers/pcmcia/rsrc_nonstatic.c:349: warning: Function parameter or member 'value' not described in 'do_validate_mem'
 drivers/pcmcia/rsrc_nonstatic.c:349: warning: Excess function parameter 'validate' description in 'do_validate_mem'
 drivers/pcmcia/rsrc_nonstatic.c:407: warning: Function parameter or member 'value' not described in 'do_mem_probe'
 drivers/pcmcia/rsrc_nonstatic.c:407: warning: Excess function parameter 'validate' description in 'do_mem_probe'
 drivers/pcmcia/rsrc_nonstatic.c:407: warning: Excess function parameter 'fallback' description in 'do_mem_probe'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
[linux@dominikbrodowski.net: removed list of CCs]
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
---
 drivers/pcmcia/rsrc_nonstatic.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c
index 3b05760e69d6..55f9fed478eb 100644
--- a/drivers/pcmcia/rsrc_nonstatic.c
+++ b/drivers/pcmcia/rsrc_nonstatic.c
@@ -257,7 +257,7 @@ static void do_io_probe(struct pcmcia_socket *s, unsigned int base,
 
 /*======================================================================*/
 
-/**
+/*
  * readable() - iomem validation function for cards with a valid CIS
  */
 static int readable(struct pcmcia_socket *s, struct resource *res,
@@ -288,7 +288,7 @@ static int readable(struct pcmcia_socket *s, struct resource *res,
 	return 0;
 }
 
-/**
+/*
  * checksum() - iomem validation function for simple memory cards
  */
 static int checksum(struct pcmcia_socket *s, struct resource *res,
-- 
cgit v1.2.3


From cc448baf85c8f25282189b7f81c85c3bf10dfd9f Mon Sep 17 00:00:00 2001
From: Lee Jones <lee.jones@linaro.org>
Date: Fri, 12 Mar 2021 11:02:35 +0000
Subject: pcmcia: cistpl: Demote non-conformant kernel-doc headers to standard
 comments

Fixes the following W=1 kernel build warning(s):

 drivers/pcmcia/cistpl.c:88: warning: Function parameter or member 's' not described in 'set_cis_map'
 drivers/pcmcia/cistpl.c:88: warning: Function parameter or member 'card_offset' not described in 'set_cis_map'
 drivers/pcmcia/cistpl.c:88: warning: Function parameter or member 'flags' not described in 'set_cis_map'
 drivers/pcmcia/cistpl.c:136: warning: Function parameter or member 's' not described in 'pcmcia_read_cis_mem'
 drivers/pcmcia/cistpl.c:136: warning: Function parameter or member 'attr' not described in 'pcmcia_read_cis_mem'
 drivers/pcmcia/cistpl.c:136: warning: Function parameter or member 'addr' not described in 'pcmcia_read_cis_mem'
 drivers/pcmcia/cistpl.c:136: warning: Function parameter or member 'len' not described in 'pcmcia_read_cis_mem'
 drivers/pcmcia/cistpl.c:136: warning: Function parameter or member 'ptr' not described in 'pcmcia_read_cis_mem'
 drivers/pcmcia/cistpl.c:217: warning: Function parameter or member 's' not described in 'pcmcia_write_cis_mem'
 drivers/pcmcia/cistpl.c:217: warning: Function parameter or member 'attr' not described in 'pcmcia_write_cis_mem'
 drivers/pcmcia/cistpl.c:217: warning: Function parameter or member 'addr' not described in 'pcmcia_write_cis_mem'
 drivers/pcmcia/cistpl.c:217: warning: Function parameter or member 'len' not described in 'pcmcia_write_cis_mem'
 drivers/pcmcia/cistpl.c:217: warning: Function parameter or member 'ptr' not described in 'pcmcia_write_cis_mem'
 drivers/pcmcia/cistpl.c:289: warning: Function parameter or member 's' not described in 'read_cis_cache'
 drivers/pcmcia/cistpl.c:289: warning: Function parameter or member 'attr' not described in 'read_cis_cache'
 drivers/pcmcia/cistpl.c:289: warning: Function parameter or member 'addr' not described in 'read_cis_cache'
 drivers/pcmcia/cistpl.c:289: warning: Function parameter or member 'len' not described in 'read_cis_cache'
 drivers/pcmcia/cistpl.c:289: warning: Function parameter or member 'ptr' not described in 'read_cis_cache'
 drivers/pcmcia/cistpl.c:372: warning: Function parameter or member 's' not described in 'verify_cis_cache'
 drivers/pcmcia/cistpl.c:412: warning: Function parameter or member 's' not described in 'pcmcia_replace_cis'
 drivers/pcmcia/cistpl.c:412: warning: Function parameter or member 'data' not described in 'pcmcia_replace_cis'
 drivers/pcmcia/cistpl.c:412: warning: Function parameter or member 'len' not described in 'pcmcia_replace_cis'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
[linux@dominikbrodowski.net: removed list of CCs]
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
---
 drivers/pcmcia/cistpl.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c
index e6939103991b..948b763dc451 100644
--- a/drivers/pcmcia/cistpl.c
+++ b/drivers/pcmcia/cistpl.c
@@ -75,7 +75,7 @@ void release_cis_mem(struct pcmcia_socket *s)
 	mutex_unlock(&s->ops_mutex);
 }
 
-/**
+/*
  * set_cis_map() - map the card memory at "card_offset" into virtual space.
  *
  * If flags & MAP_ATTRIB, map the attribute space, otherwise
@@ -126,7 +126,7 @@ static void __iomem *set_cis_map(struct pcmcia_socket *s,
 #define IS_ATTR		1
 #define IS_INDIRECT	8
 
-/**
+/*
  * pcmcia_read_cis_mem() - low-level function to read CIS memory
  *
  * must be called with ops_mutex held
@@ -206,7 +206,7 @@ int pcmcia_read_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
 }
 
 
-/**
+/*
  * pcmcia_write_cis_mem() - low-level function to write CIS memory
  *
  * Probably only useful for writing one-byte registers. Must be called
@@ -277,7 +277,7 @@ int pcmcia_write_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
 }
 
 
-/**
+/*
  * read_cis_cache() - read CIS memory or its associated cache
  *
  * This is a wrapper around read_cis_mem, with the same interface,
@@ -365,7 +365,7 @@ void destroy_cis_cache(struct pcmcia_socket *s)
 	}
 }
 
-/**
+/*
  * verify_cis_cache() - does the CIS match what is in the CIS cache?
  */
 int verify_cis_cache(struct pcmcia_socket *s)
@@ -401,7 +401,7 @@ int verify_cis_cache(struct pcmcia_socket *s)
 	return 0;
 }
 
-/**
+/*
  * pcmcia_replace_cis() - use a replacement CIS instead of the card's CIS
  *
  * For really bad cards, we provide a facility for uploading a
-- 
cgit v1.2.3


From f4468bbbe25eae0839aeada937c4ac8d9a5086d9 Mon Sep 17 00:00:00 2001
From: Lee Jones <lee.jones@linaro.org>
Date: Fri, 12 Mar 2021 11:02:36 +0000
Subject: pcmcia: pcmcia_cis: Demote non-conforming kernel-doc headers to
 standard kernel-doc

Fixes the following W=1 kernel build warning(s):

 drivers/pcmcia/pcmcia_cis.c:129: warning: Function parameter or member 'flags' not described in 'pcmcia_io_cfg_data_width'
 drivers/pcmcia/pcmcia_cis.c:154: warning: Function parameter or member 'tuple' not described in 'pcmcia_do_loop_config'
 drivers/pcmcia/pcmcia_cis.c:154: warning: Function parameter or member 'parse' not described in 'pcmcia_do_loop_config'
 drivers/pcmcia/pcmcia_cis.c:154: warning: Function parameter or member 'priv' not described in 'pcmcia_do_loop_config'
 drivers/pcmcia/pcmcia_cis.c:300: warning: Function parameter or member 'tuple' not described in 'pcmcia_do_loop_tuple'
 drivers/pcmcia/pcmcia_cis.c:300: warning: Function parameter or member 'parse' not described in 'pcmcia_do_loop_tuple'
 drivers/pcmcia/pcmcia_cis.c:300: warning: Function parameter or member 'priv' not described in 'pcmcia_do_loop_tuple'
 drivers/pcmcia/pcmcia_cis.c:351: warning: Function parameter or member 'p_dev' not described in 'pcmcia_do_get_tuple'
 drivers/pcmcia/pcmcia_cis.c:351: warning: Function parameter or member 'tuple' not described in 'pcmcia_do_get_tuple'
 drivers/pcmcia/pcmcia_cis.c:351: warning: Function parameter or member 'priv' not described in 'pcmcia_do_get_tuple'
 drivers/pcmcia/pcmcia_cis.c:399: warning: Function parameter or member 'p_dev' not described in 'pcmcia_do_get_mac'
 drivers/pcmcia/pcmcia_cis.c:399: warning: Function parameter or member 'tuple' not described in 'pcmcia_do_get_mac'
 drivers/pcmcia/pcmcia_cis.c:399: warning: Function parameter or member 'priv' not described in 'pcmcia_do_get_mac'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
[linux@dominikbrodowski.net: removed list of CCs]
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
---
 drivers/pcmcia/pcmcia_cis.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pcmcia/pcmcia_cis.c b/drivers/pcmcia/pcmcia_cis.c
index e4c4daf92038..d2d0ed4b27c8 100644
--- a/drivers/pcmcia/pcmcia_cis.c
+++ b/drivers/pcmcia/pcmcia_cis.c
@@ -122,7 +122,7 @@ next_entry:
 }
 
 
-/**
+/*
  * pcmcia_io_cfg_data_width() - convert cfgtable to data path width parameter
  */
 static int pcmcia_io_cfg_data_width(unsigned int flags)
@@ -143,7 +143,7 @@ struct pcmcia_cfg_mem {
 	cistpl_cftable_entry_t dflt;
 };
 
-/**
+/*
  * pcmcia_do_loop_config() - internal helper for pcmcia_loop_config()
  *
  * pcmcia_do_loop_config() is the internal callback for the call from
@@ -289,7 +289,7 @@ struct pcmcia_loop_mem {
 			   void *priv_data);
 };
 
-/**
+/*
  * pcmcia_do_loop_tuple() - internal helper for pcmcia_loop_config()
  *
  * pcmcia_do_loop_tuple() is the internal callback for the call from
@@ -337,7 +337,7 @@ struct pcmcia_loop_get {
 	cisdata_t **buf;
 };
 
-/**
+/*
  * pcmcia_do_get_tuple() - internal helper for pcmcia_get_tuple()
  *
  * pcmcia_do_get_tuple() is the internal callback for the call from
@@ -386,7 +386,7 @@ size_t pcmcia_get_tuple(struct pcmcia_device *p_dev, cisdata_t code,
 EXPORT_SYMBOL(pcmcia_get_tuple);
 
 
-/**
+/*
  * pcmcia_do_get_mac() - internal helper for pcmcia_get_mac_from_cis()
  *
  * pcmcia_do_get_mac() is the internal callback for the call from
-- 
cgit v1.2.3


From 6562e2cb8c7fa2f4982cdb28a2740a3bb7ec2c43 Mon Sep 17 00:00:00 2001
From: Lee Jones <lee.jones@linaro.org>
Date: Fri, 12 Mar 2021 11:02:37 +0000
Subject: pcmcia: ds: Fix function name disparity in header

Fixes the following W=1 kernel build warning(s):

 drivers/pcmcia/ds.c:96: warning: expecting prototype for pcmcia_store_new_id(). Prototype was for new_id_store() instead

Signed-off-by: Lee Jones <lee.jones@linaro.org>
[linux@dominikbrodowski.net: removed list of CCs]
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
---
 drivers/pcmcia/ds.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index 6ecb64140f37..bd81aa64d011 100644
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -83,7 +83,7 @@ struct pcmcia_dynid {
 };
 
 /**
- * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
+ * new_id_store() - add a new PCMCIA device ID to this driver and re-probe devices
  * @driver: target device driver
  * @buf: buffer for scanning device ID data
  * @count: input size
-- 
cgit v1.2.3


From 1d26d6f2cbd049b4be295db2d6328d6bcfd50af7 Mon Sep 17 00:00:00 2001
From: Lee Jones <lee.jones@linaro.org>
Date: Fri, 12 Mar 2021 11:02:38 +0000
Subject: pcmcia: pcmcia_resource: Fix some kernel-doc formatting/disparities
 and demote others

Fixes the following W=1 kernel build warning(s):

 drivers/pcmcia/pcmcia_resource.c:160: warning: Function parameter or member 'p_dev' not described in 'pcmcia_access_config'
 drivers/pcmcia/pcmcia_resource.c:160: warning: Function parameter or member 'where' not described in 'pcmcia_access_config'
 drivers/pcmcia/pcmcia_resource.c:160: warning: Function parameter or member 'val' not described in 'pcmcia_access_config'
 drivers/pcmcia/pcmcia_resource.c:160: warning: Function parameter or member 'accessf' not described in 'pcmcia_access_config'
 drivers/pcmcia/pcmcia_resource.c:194: warning: Function parameter or member 'p_dev' not described in 'pcmcia_read_config_byte'
 drivers/pcmcia/pcmcia_resource.c:194: warning: Function parameter or member 'where' not described in 'pcmcia_read_config_byte'
 drivers/pcmcia/pcmcia_resource.c:194: warning: Function parameter or member 'val' not described in 'pcmcia_read_config_byte'
 drivers/pcmcia/pcmcia_resource.c:207: warning: Function parameter or member 'p_dev' not described in 'pcmcia_write_config_byte'
 drivers/pcmcia/pcmcia_resource.c:207: warning: Function parameter or member 'where' not described in 'pcmcia_write_config_byte'
 drivers/pcmcia/pcmcia_resource.c:207: warning: Function parameter or member 'val' not described in 'pcmcia_write_config_byte'
 drivers/pcmcia/pcmcia_resource.c:728: warning: Function parameter or member 'p_dev' not described in 'pcmcia_setup_isa_irq'
 drivers/pcmcia/pcmcia_resource.c:728: warning: Function parameter or member 'type' not described in 'pcmcia_setup_isa_irq'
 drivers/pcmcia/pcmcia_resource.c:793: warning: Function parameter or member 'p_dev' not described in 'pcmcia_setup_irq'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
[linux@dominikbrodowski.net: removed list of CCs]
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
---
 drivers/pcmcia/pcmcia_resource.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pcmcia/pcmcia_resource.c b/drivers/pcmcia/pcmcia_resource.c
index e3a6b6c8a5b0..c1c197292111 100644
--- a/drivers/pcmcia/pcmcia_resource.c
+++ b/drivers/pcmcia/pcmcia_resource.c
@@ -144,7 +144,7 @@ static int alloc_io_space(struct pcmcia_socket *s, struct resource *res,
 }
 
 
-/**
+/*
  * pcmcia_access_config() - read or write card configuration registers
  *
  * pcmcia_access_config() reads and writes configuration registers in
@@ -184,7 +184,7 @@ static int pcmcia_access_config(struct pcmcia_device *p_dev,
 }
 
 
-/**
+/*
  * pcmcia_read_config_byte() - read a byte from a card configuration register
  *
  * pcmcia_read_config_byte() reads a byte from a configuration register in
@@ -197,7 +197,7 @@ int pcmcia_read_config_byte(struct pcmcia_device *p_dev, off_t where, u8 *val)
 EXPORT_SYMBOL(pcmcia_read_config_byte);
 
 
-/**
+/*
  * pcmcia_write_config_byte() - write a byte to a card configuration register
  *
  * pcmcia_write_config_byte() writes a byte to a configuration register in
@@ -720,7 +720,8 @@ static irqreturn_t test_action(int cpl, void *dev_id)
 
 /**
  * pcmcia_setup_isa_irq() - determine whether an ISA IRQ can be used
- * @p_dev - the associated PCMCIA device
+ * @p_dev: the associated PCMCIA device
+ * @type:  IRQ type (flags)
  *
  * locking note: must be called with ops_mutex locked.
  */
@@ -785,7 +786,7 @@ void pcmcia_cleanup_irq(struct pcmcia_socket *s)
 
 /**
  * pcmcia_setup_irq() - determine IRQ to be used for device
- * @p_dev - the associated PCMCIA device
+ * @p_dev: the associated PCMCIA device
  *
  * locking note: must be called with ops_mutex locked.
  */
-- 
cgit v1.2.3


From e9d503fef7da2cc0610ce9cd056d0347ec9cafc4 Mon Sep 17 00:00:00 2001
From: Lee Jones <lee.jones@linaro.org>
Date: Fri, 12 Mar 2021 11:02:39 +0000
Subject: pcmcia: rsrc_nonstatic: Fix call-back function as reference
 formatting

Fixes the following W=1 kernel build warning(s):

 drivers/pcmcia/rsrc_nonstatic.c:349: warning: Function parameter or member 'value' not described in 'do_validate_mem'
 drivers/pcmcia/rsrc_nonstatic.c:349: warning: Excess function parameter 'validate' description in 'do_validate_mem'
 drivers/pcmcia/rsrc_nonstatic.c:407: warning: Function parameter or member 'value' not described in 'do_mem_probe'
 drivers/pcmcia/rsrc_nonstatic.c:407: warning: Excess function parameter 'validate' description in 'do_mem_probe'
 drivers/pcmcia/rsrc_nonstatic.c:407: warning: Excess function parameter 'fallback' description in 'do_mem_probe'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
[linux@dominikbrodowski.net: removed list of CCs]
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
---
 drivers/pcmcia/rsrc_nonstatic.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c
index 55f9fed478eb..bb15a8bdbaab 100644
--- a/drivers/pcmcia/rsrc_nonstatic.c
+++ b/drivers/pcmcia/rsrc_nonstatic.c
@@ -343,9 +343,9 @@ static int checksum(struct pcmcia_socket *s, struct resource *res,
  */
 static int do_validate_mem(struct pcmcia_socket *s,
 			   unsigned long base, unsigned long size,
-			   int validate (struct pcmcia_socket *s,
-					 struct resource *res,
-					 unsigned int *value))
+			   int (*validate)(struct pcmcia_socket *s,
+					   struct resource *res,
+					   unsigned int *value))
 {
 	struct socket_data *s_data = s->resource_data;
 	struct resource *res1, *res2;
@@ -398,12 +398,12 @@ static int do_validate_mem(struct pcmcia_socket *s,
  * function returns the size of the usable memory area.
  */
 static int do_mem_probe(struct pcmcia_socket *s, u_long base, u_long num,
-			int validate (struct pcmcia_socket *s,
-				      struct resource *res,
-				      unsigned int *value),
-			int fallback (struct pcmcia_socket *s,
-				      struct resource *res,
-				      unsigned int *value))
+			int (*validate)(struct pcmcia_socket *s,
+					struct resource *res,
+					unsigned int *value),
+			int (*fallback)(struct pcmcia_socket *s,
+					struct resource *res,
+					unsigned int *value))
 {
 	struct socket_data *s_data = s->resource_data;
 	u_long i, j, bad, fail, step;
-- 
cgit v1.2.3


From 8230ce9a4e206fa1be17d66245f87cae2935d7d2 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Thu, 28 Jan 2021 14:44:15 +0100
Subject: dma-iommu: refactor iommu_dma_alloc_remap

Split out a new helper that only allocates a sg_table worth of
memory without mapping it into contiguous kernel address space.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Tested-by: Ricardo Ribalda <ribalda@chromium.org>
---
 drivers/iommu/dma-iommu.c | 67 +++++++++++++++++++++++++----------------------
 1 file changed, 35 insertions(+), 32 deletions(-)

(limited to 'drivers')

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index af765c813cc8..ec1abad156db 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -650,23 +650,12 @@ static struct page **__iommu_dma_alloc_pages(struct device *dev,
 	return pages;
 }
 
-/**
- * iommu_dma_alloc_remap - Allocate and map a buffer contiguous in IOVA space
- * @dev: Device to allocate memory for. Must be a real device
- *	 attached to an iommu_dma_domain
- * @size: Size of buffer in bytes
- * @dma_handle: Out argument for allocated DMA handle
- * @gfp: Allocation flags
- * @prot: pgprot_t to use for the remapped mapping
- * @attrs: DMA attributes for this allocation
- *
- * If @size is less than PAGE_SIZE, then a full CPU page will be allocated,
+/*
+ * If size is less than PAGE_SIZE, then a full CPU page will be allocated,
  * but an IOMMU which supports smaller pages might not map the whole thing.
- *
- * Return: Mapped virtual address, or NULL on failure.
  */
-static void *iommu_dma_alloc_remap(struct device *dev, size_t size,
-		dma_addr_t *dma_handle, gfp_t gfp, pgprot_t prot,
+static struct page **__iommu_dma_alloc_noncontiguous(struct device *dev,
+		size_t size, struct sg_table *sgt, gfp_t gfp, pgprot_t prot,
 		unsigned long attrs)
 {
 	struct iommu_domain *domain = iommu_get_dma_domain(dev);
@@ -676,11 +665,7 @@ static void *iommu_dma_alloc_remap(struct device *dev, size_t size,
 	int ioprot = dma_info_to_prot(DMA_BIDIRECTIONAL, coherent, attrs);
 	unsigned int count, min_size, alloc_sizes = domain->pgsize_bitmap;
 	struct page **pages;
-	struct sg_table sgt;
 	dma_addr_t iova;
-	void *vaddr;
-
-	*dma_handle = DMA_MAPPING_ERROR;
 
 	if (static_branch_unlikely(&iommu_deferred_attach_enabled) &&
 	    iommu_deferred_attach(dev, domain))
@@ -707,38 +692,56 @@ static void *iommu_dma_alloc_remap(struct device *dev, size_t size,
 	if (!iova)
 		goto out_free_pages;
 
-	if (sg_alloc_table_from_pages(&sgt, pages, count, 0, size, GFP_KERNEL))
+	if (sg_alloc_table_from_pages(sgt, pages, count, 0, size, GFP_KERNEL))
 		goto out_free_iova;
 
 	if (!(ioprot & IOMMU_CACHE)) {
 		struct scatterlist *sg;
 		int i;
 
-		for_each_sg(sgt.sgl, sg, sgt.orig_nents, i)
+		for_each_sg(sgt->sgl, sg, sgt->orig_nents, i)
 			arch_dma_prep_coherent(sg_page(sg), sg->length);
 	}
 
-	if (iommu_map_sg_atomic(domain, iova, sgt.sgl, sgt.orig_nents, ioprot)
+	if (iommu_map_sg_atomic(domain, iova, sgt->sgl, sgt->orig_nents, ioprot)
 			< size)
 		goto out_free_sg;
 
+	sgt->sgl->dma_address = iova;
+	return pages;
+
+out_free_sg:
+	sg_free_table(sgt);
+out_free_iova:
+	iommu_dma_free_iova(cookie, iova, size, NULL);
+out_free_pages:
+	__iommu_dma_free_pages(pages, count);
+	return NULL;
+}
+
+static void *iommu_dma_alloc_remap(struct device *dev, size_t size,
+		dma_addr_t *dma_handle, gfp_t gfp, pgprot_t prot,
+		unsigned long attrs)
+{
+	struct page **pages;
+	struct sg_table sgt;
+	void *vaddr;
+
+	pages = __iommu_dma_alloc_noncontiguous(dev, size, &sgt, gfp, prot,
+						attrs);
+	if (!pages)
+		return NULL;
+	*dma_handle = sgt.sgl->dma_address;
+	sg_free_table(&sgt);
 	vaddr = dma_common_pages_remap(pages, size, prot,
 			__builtin_return_address(0));
 	if (!vaddr)
 		goto out_unmap;
-
-	*dma_handle = iova;
-	sg_free_table(&sgt);
 	return vaddr;
 
 out_unmap:
-	__iommu_dma_unmap(dev, iova, size);
-out_free_sg:
-	sg_free_table(&sgt);
-out_free_iova:
-	iommu_dma_free_iova(cookie, iova, size, NULL);
-out_free_pages:
-	__iommu_dma_free_pages(pages, count);
+	__iommu_dma_unmap(dev, *dma_handle, size);
+	__iommu_dma_free_pages(pages, PAGE_ALIGN(size) >> PAGE_SHIFT);
 	return NULL;
 }
 
-- 
cgit v1.2.3


From e817ee5f2f95ca58a3b961ae4acfd3885e830b9c Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Thu, 28 Jan 2021 14:47:29 +0100
Subject: dma-iommu: implement ->alloc_noncontiguous

Implement support for allocating a non-contiguous DMA region.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Tested-by: Ricardo Ribalda <ribalda@chromium.org>
---
 drivers/iommu/dma-iommu.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'drivers')

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index ec1abad156db..1946422e4ac7 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -708,6 +708,7 @@ static struct page **__iommu_dma_alloc_noncontiguous(struct device *dev,
 		goto out_free_sg;
 
 	sgt->sgl->dma_address = iova;
+	sgt->sgl->dma_length = size;
 	return pages;
 
 out_free_sg:
@@ -745,6 +746,37 @@ out_unmap:
 	return NULL;
 }
 
+#ifdef CONFIG_DMA_REMAP
+static struct sg_table *iommu_dma_alloc_noncontiguous(struct device *dev,
+		size_t size, enum dma_data_direction dir, gfp_t gfp,
+		unsigned long attrs)
+{
+	struct dma_sgt_handle *sh;
+
+	sh = kmalloc(sizeof(*sh), gfp);
+	if (!sh)
+		return NULL;
+
+	sh->pages = __iommu_dma_alloc_noncontiguous(dev, size, &sh->sgt, gfp,
+						    PAGE_KERNEL, attrs);
+	if (!sh->pages) {
+		kfree(sh);
+		return NULL;
+	}
+	return &sh->sgt;
+}
+
+static void iommu_dma_free_noncontiguous(struct device *dev, size_t size,
+		struct sg_table *sgt, enum dma_data_direction dir)
+{
+	struct dma_sgt_handle *sh = sgt_handle(sgt);
+
+	__iommu_dma_unmap(dev, sgt->sgl->dma_address, size);
+	__iommu_dma_free_pages(sh->pages, PAGE_ALIGN(size) >> PAGE_SHIFT);
+	sg_free_table(&sh->sgt);
+}
+#endif /* CONFIG_DMA_REMAP */
+
 static void iommu_dma_sync_single_for_cpu(struct device *dev,
 		dma_addr_t dma_handle, size_t size, enum dma_data_direction dir)
 {
@@ -1261,6 +1293,10 @@ static const struct dma_map_ops iommu_dma_ops = {
 	.free			= iommu_dma_free,
 	.alloc_pages		= dma_common_alloc_pages,
 	.free_pages		= dma_common_free_pages,
+#ifdef CONFIG_DMA_REMAP
+	.alloc_noncontiguous	= iommu_dma_alloc_noncontiguous,
+	.free_noncontiguous	= iommu_dma_free_noncontiguous,
+#endif
 	.mmap			= iommu_dma_mmap,
 	.get_sgtable		= iommu_dma_get_sgtable,
 	.map_page		= iommu_dma_map_page,
-- 
cgit v1.2.3


From 936d3685e62436a378f02b8b74759b054d4aeca1 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Thu, 25 Feb 2021 14:42:04 +0100
Subject: rtc: tps65910: include linux/property.h

The added device_property_present() call causes a build
failure in some configurations because of the missing header:

drivers/rtc/rtc-tps65910.c:422:7: error: implicit declaration of function 'device_property_present' [-Werror,-Wimplicit-function-declaration]

Fixes: 454ba154a62c ("rtc: tps65910: Support wakeup-source property")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210225134215.2263694-1-arnd@kernel.org
---
 drivers/rtc/rtc-tps65910.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-tps65910.c b/drivers/rtc/rtc-tps65910.c
index 288abb1abdb8..bc89c62ccb9b 100644
--- a/drivers/rtc/rtc-tps65910.c
+++ b/drivers/rtc/rtc-tps65910.c
@@ -18,6 +18,7 @@
 #include <linux/rtc.h>
 #include <linux/bcd.h>
 #include <linux/math64.h>
+#include <linux/property.h>
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
 #include <linux/mfd/tps65910.h>
-- 
cgit v1.2.3


From 6e00b6d0083ea5f529b057e87c0236747871b6a8 Mon Sep 17 00:00:00 2001
From: Heiko Schocher <hs@denx.de>
Date: Tue, 9 Mar 2021 14:47:19 +0100
Subject: rtc: rv3028: correct weekday register usage
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The datasheet for the rv3028 says the weekday has exact 3 bits
and in chapter 3.4.0 for the "3h–Weekday" register it says:
"""
This register holds the current day of the week. Each value represents
one weekday that is assigned by the user. Values will range from 0 to 6
The weekday counter is simply a 3-bit counter which counts up to 6
and then resets to 0.
"""

So do not code weekday bitwise instead, use the raw values from
0-6.

Tested on "PHYTEC phyBOARD-Pollux i.MX8MP" board.

Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210309134719.1494062-1-hs@denx.de
---
 drivers/rtc/rtc-rv3028.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-rv3028.c b/drivers/rtc/rtc-rv3028.c
index 0c48d980d06a..12c807306893 100644
--- a/drivers/rtc/rtc-rv3028.c
+++ b/drivers/rtc/rtc-rv3028.c
@@ -320,7 +320,7 @@ static int rv3028_get_time(struct device *dev, struct rtc_time *tm)
 	tm->tm_sec  = bcd2bin(date[RV3028_SEC] & 0x7f);
 	tm->tm_min  = bcd2bin(date[RV3028_MIN] & 0x7f);
 	tm->tm_hour = bcd2bin(date[RV3028_HOUR] & 0x3f);
-	tm->tm_wday = ilog2(date[RV3028_WDAY] & 0x7f);
+	tm->tm_wday = date[RV3028_WDAY] & 0x7f;
 	tm->tm_mday = bcd2bin(date[RV3028_DAY] & 0x3f);
 	tm->tm_mon  = bcd2bin(date[RV3028_MONTH] & 0x1f) - 1;
 	tm->tm_year = bcd2bin(date[RV3028_YEAR]) + 100;
@@ -337,7 +337,7 @@ static int rv3028_set_time(struct device *dev, struct rtc_time *tm)
 	date[RV3028_SEC]   = bin2bcd(tm->tm_sec);
 	date[RV3028_MIN]   = bin2bcd(tm->tm_min);
 	date[RV3028_HOUR]  = bin2bcd(tm->tm_hour);
-	date[RV3028_WDAY]  = 1 << (tm->tm_wday);
+	date[RV3028_WDAY]  = tm->tm_wday;
 	date[RV3028_DAY]   = bin2bcd(tm->tm_mday);
 	date[RV3028_MONTH] = bin2bcd(tm->tm_mon + 1);
 	date[RV3028_YEAR]  = bin2bcd(tm->tm_year - 100);
-- 
cgit v1.2.3


From 198da7be18c47637d69cdab1f65581b04ebd759d Mon Sep 17 00:00:00 2001
From: Fabio Estevam <festevam@gmail.com>
Date: Mon, 15 Mar 2021 14:20:29 -0300
Subject: rtc: imxdi: Convert to a DT-only driver

i.MX has been converted to a DT-only platform, so make the driver
depend on OF, remove the CONFIG_OF ifdefery and remove of_match_ptr().

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210315172029.173250-1-festevam@gmail.com
---
 drivers/rtc/Kconfig     | 1 +
 drivers/rtc/rtc-imxdi.c | 4 +---
 2 files changed, 2 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index ce723dc54aa4..9a82cb57586f 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -1331,6 +1331,7 @@ config RTC_DRV_DIGICOLOR
 config RTC_DRV_IMXDI
 	tristate "Freescale IMX DryIce Real Time Clock"
 	depends on ARCH_MXC
+	depends on OF
 	help
 	   Support for Freescale IMX DryIce RTC
 
diff --git a/drivers/rtc/rtc-imxdi.c b/drivers/rtc/rtc-imxdi.c
index c2692da74e09..c1806f4d68e7 100644
--- a/drivers/rtc/rtc-imxdi.c
+++ b/drivers/rtc/rtc-imxdi.c
@@ -840,19 +840,17 @@ static int __exit dryice_rtc_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_OF
 static const struct of_device_id dryice_dt_ids[] = {
 	{ .compatible = "fsl,imx25-rtc" },
 	{ /* sentinel */ }
 };
 
 MODULE_DEVICE_TABLE(of, dryice_dt_ids);
-#endif
 
 static struct platform_driver dryice_rtc_driver = {
 	.driver = {
 		   .name = "imxdi_rtc",
-		   .of_match_table = of_match_ptr(dryice_dt_ids),
+		   .of_match_table = dryice_dt_ids,
 		   },
 	.remove = __exit_p(dryice_rtc_remove),
 };
-- 
cgit v1.2.3


From cee451c9d57ee170f123adacd70391dfb7a0b1a6 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andy.shevchenko@gmail.com>
Date: Mon, 15 Mar 2021 16:49:53 -0700
Subject: Input: tsc2007 - convert to GPIO descriptors

This converts the driver to use GPIO descriptors.

Note that it now uses logical polarity and thus nagation has been dropped.

Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210314210951.645783-1-andy.shevchenko@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/tsc2007.h      |  4 +++-
 drivers/input/touchscreen/tsc2007_core.c | 15 ++++++++-------
 2 files changed, 11 insertions(+), 8 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/tsc2007.h b/drivers/input/touchscreen/tsc2007.h
index 91c60bf6dcaf..69b08dd6c8df 100644
--- a/drivers/input/touchscreen/tsc2007.h
+++ b/drivers/input/touchscreen/tsc2007.h
@@ -19,6 +19,8 @@
 #ifndef _TSC2007_H
 #define _TSC2007_H
 
+struct gpio_desc;
+
 #define TSC2007_MEASURE_TEMP0		(0x0 << 4)
 #define TSC2007_MEASURE_AUX		(0x2 << 4)
 #define TSC2007_MEASURE_TEMP1		(0x4 << 4)
@@ -69,7 +71,7 @@ struct tsc2007 {
 	int			fuzzy;
 	int			fuzzz;
 
-	unsigned int		gpio;
+	struct gpio_desc	*gpiod;
 	int			irq;
 
 	wait_queue_head_t	wait;
diff --git a/drivers/input/touchscreen/tsc2007_core.c b/drivers/input/touchscreen/tsc2007_core.c
index 3b80abfc1eca..d19c623a73f5 100644
--- a/drivers/input/touchscreen/tsc2007_core.c
+++ b/drivers/input/touchscreen/tsc2007_core.c
@@ -19,11 +19,11 @@
 
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/gpio/consumer.h>
 #include <linux/input.h>
 #include <linux/interrupt.h>
 #include <linux/i2c.h>
 #include <linux/of_device.h>
-#include <linux/of_gpio.h>
 #include <linux/platform_data/tsc2007.h>
 #include "tsc2007.h"
 
@@ -226,7 +226,7 @@ static int tsc2007_get_pendown_state_gpio(struct device *dev)
 	struct i2c_client *client = to_i2c_client(dev);
 	struct tsc2007 *ts = i2c_get_clientdata(client);
 
-	return !gpio_get_value(ts->gpio);
+	return gpiod_get_value(ts->gpiod);
 }
 
 static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts)
@@ -266,13 +266,14 @@ static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts)
 		return -EINVAL;
 	}
 
-	ts->gpio = of_get_gpio(np, 0);
-	if (gpio_is_valid(ts->gpio))
+	ts->gpiod = devm_gpiod_get_optional(&client->dev, NULL, GPIOD_IN);
+	if (IS_ERR(ts->gpiod))
+		return PTR_ERR(ts->gpiod);
+
+	if (ts->gpiod)
 		ts->get_pendown_state = tsc2007_get_pendown_state_gpio;
 	else
-		dev_warn(&client->dev,
-			 "GPIO not specified in DT (of_get_gpio returned %d)\n",
-			 ts->gpio);
+		dev_warn(&client->dev, "Pen down GPIO not specified in DT\n");
 
 	return 0;
 }
-- 
cgit v1.2.3


From e512a9e9f44db4fad09d3c747c07311a643dd356 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andy.shevchenko@gmail.com>
Date: Mon, 15 Mar 2021 17:00:57 -0700
Subject: Input: tsc2007 - make use of device properties

Device property API allows to gather device resources from different sources,
such as ACPI. Convert the drivers to unleash the power of device property API.

Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210314210951.645783-2-andy.shevchenko@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/tsc2007_core.c | 49 +++++++++++---------------------
 1 file changed, 17 insertions(+), 32 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/tsc2007_core.c b/drivers/input/touchscreen/tsc2007_core.c
index d19c623a73f5..3e871d182c40 100644
--- a/drivers/input/touchscreen/tsc2007_core.c
+++ b/drivers/input/touchscreen/tsc2007_core.c
@@ -23,7 +23,8 @@
 #include <linux/input.h>
 #include <linux/interrupt.h>
 #include <linux/i2c.h>
-#include <linux/of_device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/property.h>
 #include <linux/platform_data/tsc2007.h>
 #include "tsc2007.h"
 
@@ -220,7 +221,6 @@ static void tsc2007_close(struct input_dev *input_dev)
 	tsc2007_stop(ts);
 }
 
-#ifdef CONFIG_OF
 static int tsc2007_get_pendown_state_gpio(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
@@ -229,63 +229,50 @@ static int tsc2007_get_pendown_state_gpio(struct device *dev)
 	return gpiod_get_value(ts->gpiod);
 }
 
-static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts)
+static int tsc2007_probe_properties(struct device *dev, struct tsc2007 *ts)
 {
-	struct device_node *np = client->dev.of_node;
 	u32 val32;
 	u64 val64;
 
-	if (!np) {
-		dev_err(&client->dev, "missing device tree data\n");
-		return -EINVAL;
-	}
-
-	if (!of_property_read_u32(np, "ti,max-rt", &val32))
+	if (!device_property_read_u32(dev, "ti,max-rt", &val32))
 		ts->max_rt = val32;
 	else
 		ts->max_rt = MAX_12BIT;
 
-	if (!of_property_read_u32(np, "ti,fuzzx", &val32))
+	if (!device_property_read_u32(dev, "ti,fuzzx", &val32))
 		ts->fuzzx = val32;
 
-	if (!of_property_read_u32(np, "ti,fuzzy", &val32))
+	if (!device_property_read_u32(dev, "ti,fuzzy", &val32))
 		ts->fuzzy = val32;
 
-	if (!of_property_read_u32(np, "ti,fuzzz", &val32))
+	if (!device_property_read_u32(dev, "ti,fuzzz", &val32))
 		ts->fuzzz = val32;
 
-	if (!of_property_read_u64(np, "ti,poll-period", &val64))
+	if (!device_property_read_u64(dev, "ti,poll-period", &val64))
 		ts->poll_period = msecs_to_jiffies(val64);
 	else
 		ts->poll_period = msecs_to_jiffies(1);
 
-	if (!of_property_read_u32(np, "ti,x-plate-ohms", &val32)) {
+	if (!device_property_read_u32(dev, "ti,x-plate-ohms", &val32)) {
 		ts->x_plate_ohms = val32;
 	} else {
-		dev_err(&client->dev, "missing ti,x-plate-ohms devicetree property.");
+		dev_err(dev, "Missing ti,x-plate-ohms device property\n");
 		return -EINVAL;
 	}
 
-	ts->gpiod = devm_gpiod_get_optional(&client->dev, NULL, GPIOD_IN);
+	ts->gpiod = devm_gpiod_get_optional(dev, NULL, GPIOD_IN);
 	if (IS_ERR(ts->gpiod))
 		return PTR_ERR(ts->gpiod);
 
 	if (ts->gpiod)
 		ts->get_pendown_state = tsc2007_get_pendown_state_gpio;
 	else
-		dev_warn(&client->dev, "Pen down GPIO not specified in DT\n");
+		dev_warn(dev, "Pen down GPIO is not specified in properties\n");
 
 	return 0;
 }
-#else
-static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts)
-{
-	dev_err(&client->dev, "platform data is required!\n");
-	return -EINVAL;
-}
-#endif
 
-static int tsc2007_probe_pdev(struct i2c_client *client, struct tsc2007 *ts,
+static int tsc2007_probe_pdev(struct device *dev, struct tsc2007 *ts,
 			      const struct tsc2007_platform_data *pdata,
 			      const struct i2c_device_id *id)
 {
@@ -300,7 +287,7 @@ static int tsc2007_probe_pdev(struct i2c_client *client, struct tsc2007 *ts,
 	ts->fuzzz             = pdata->fuzzz;
 
 	if (pdata->x_plate_ohms == 0) {
-		dev_err(&client->dev, "x_plate_ohms is not set up in platform data");
+		dev_err(dev, "x_plate_ohms is not set up in platform data\n");
 		return -EINVAL;
 	}
 
@@ -333,9 +320,9 @@ static int tsc2007_probe(struct i2c_client *client,
 		return -ENOMEM;
 
 	if (pdata)
-		err = tsc2007_probe_pdev(client, ts, pdata, id);
+		err = tsc2007_probe_pdev(&client->dev, ts, pdata, id);
 	else
-		err = tsc2007_probe_dt(client, ts);
+		err = tsc2007_probe_properties(&client->dev, ts);
 	if (err)
 		return err;
 
@@ -432,18 +419,16 @@ static const struct i2c_device_id tsc2007_idtable[] = {
 
 MODULE_DEVICE_TABLE(i2c, tsc2007_idtable);
 
-#ifdef CONFIG_OF
 static const struct of_device_id tsc2007_of_match[] = {
 	{ .compatible = "ti,tsc2007" },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, tsc2007_of_match);
-#endif
 
 static struct i2c_driver tsc2007_driver = {
 	.driver = {
 		.name	= "tsc2007",
-		.of_match_table = of_match_ptr(tsc2007_of_match),
+		.of_match_table = tsc2007_of_match,
 	},
 	.id_table	= tsc2007_idtable,
 	.probe		= tsc2007_probe,
-- 
cgit v1.2.3


From 9346ff0bc6ff3c3a495d50a43b57df8fed7bc562 Mon Sep 17 00:00:00 2001
From: Fabio Estevam <festevam@gmail.com>
Date: Mon, 15 Mar 2021 20:58:00 -0300
Subject: rtc: mxc: Remove unneeded of_match_ptr()

i.MX is a DT-only platform, so of_match_ptr() can be safely
removed.

Remove the unneeded of_match_ptr().

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210315235800.200137-1-festevam@gmail.com
---
 drivers/rtc/rtc-mxc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c
index db57dda7ab97..0f08f22df869 100644
--- a/drivers/rtc/rtc-mxc.c
+++ b/drivers/rtc/rtc-mxc.c
@@ -415,7 +415,7 @@ static int mxc_rtc_probe(struct platform_device *pdev)
 static struct platform_driver mxc_rtc_driver = {
 	.driver = {
 		   .name	= "mxc_rtc",
-		   .of_match_table = of_match_ptr(imx_rtc_dt_ids),
+		   .of_match_table = imx_rtc_dt_ids,
 	},
 	.probe = mxc_rtc_probe,
 };
-- 
cgit v1.2.3


From 50db2050faf854cbaf4b6557a7a8ca21bff302ae Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Sat, 13 Mar 2021 13:53:11 +0100
Subject: dmaengine: xilinx: Introduce synchronize() callback

The Xilinx dmaengine driver uses a tasklet to process completed
descriptors and execute their callbacks.

Currently consumers of the DMA channel have to no method of synchronization
against this tasklet when using the Xilinx dmaengine drivers. This can lead
to race conditions when the consumer frees resources that are accessed in
the callback before the tasklet has finished running.

It is not enough to just call dmaengine_terminal_all() since on a
multi-processor system the tasklet can run concurrently to it and might
call the callback after dmaengine_terminate_all() has already finished.

To mitigate this issue implement the synchronize() callback for the driver,
which will wait until the tasklet has finished.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20210313125311.4823-1-lars@metafoo.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/xilinx/xilinx_dma.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'drivers')

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 3aded7861fef..75c0b8e904e5 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -2453,6 +2453,13 @@ static int xilinx_dma_terminate_all(struct dma_chan *dchan)
 	return 0;
 }
 
+static void xilinx_dma_synchronize(struct dma_chan *dchan)
+{
+	struct xilinx_dma_chan *chan = to_xilinx_chan(dchan);
+
+	tasklet_kill(&chan->tasklet);
+}
+
 /**
  * xilinx_dma_channel_set_config - Configure VDMA channel
  * Run-time configuration for Axi VDMA, supports:
@@ -3074,6 +3081,7 @@ static int xilinx_dma_probe(struct platform_device *pdev)
 	xdev->common.device_free_chan_resources =
 				xilinx_dma_free_chan_resources;
 	xdev->common.device_terminate_all = xilinx_dma_terminate_all;
+	xdev->common.device_synchronize = xilinx_dma_synchronize;
 	xdev->common.device_tx_status = xilinx_dma_tx_status;
 	xdev->common.device_issue_pending = xilinx_dma_issue_pending;
 	if (xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA) {
-- 
cgit v1.2.3


From 6e3e14c9385c3cfb35f9da4f495acdd21f9bc25b Mon Sep 17 00:00:00 2001
From: "jeson.gao" <jeson.gao@unisoc.com>
Date: Mon, 15 Mar 2021 16:25:37 +0800
Subject: thermal/core/power_allocator: Using round the division when
 re-divvying up power

The division is used directly in re-divvying up power, the decimal part will
be discarded, devices will get less than the extra_actor_power - 1.
if using round the division to make the calculation more accurate.

For example:
actor0 received more than its max_power, it has the extra_power 759
actor1 received less than its max_power, it require extra_actor_power 395
actor2 received less than its max_power, it require extra_actor_power 365
actor1 and actor2 require the total capped_extra_power 760

using division in re-divvying up power
actor1 would actually get the extra_actor_power 394
actor2 would actually get the extra_actor_power 364

if using round the division in re-divvying up power
actor1 would actually get the extra_actor_power 394
actor2 would actually get the extra_actor_power 365

Signed-off-by: Jeson Gao <jeson.gao@unisoc.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/1615796737-4688-1-git-send-email-gao.yunxiao6@gmail.com
---
 drivers/thermal/gov_power_allocator.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/gov_power_allocator.c b/drivers/thermal/gov_power_allocator.c
index 92acae53df49..2802a0e13c88 100644
--- a/drivers/thermal/gov_power_allocator.c
+++ b/drivers/thermal/gov_power_allocator.c
@@ -374,9 +374,11 @@ static void divvy_up_power(u32 *req_power, u32 *max_power, int num_actors,
 	 */
 	extra_power = min(extra_power, capped_extra_power);
 	if (capped_extra_power > 0)
-		for (i = 0; i < num_actors; i++)
-			granted_power[i] += (extra_actor_power[i] *
-					extra_power) / capped_extra_power;
+		for (i = 0; i < num_actors; i++) {
+			u64 extra_range = (u64)extra_actor_power[i] * extra_power;
+			granted_power[i] += DIV_ROUND_CLOSEST_ULL(extra_range,
+							 capped_extra_power);
+		}
 }
 
 static int allocate_power(struct thermal_zone_device *tz,
-- 
cgit v1.2.3


From 04e0a39fc10f82a71b84af73351333b184cee578 Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 18 Feb 2021 20:03:55 +0100
Subject: dmaengine: dw-edma: Add writeq() and readq() for 64 bits
 architectures

Add writeq() and readq() for 64 bits architures support.

Supporting these two functions will allow the write or the read of eDMA
64 bits registers at once instead of having two consecutive operations.

Also, this improvement will allow the PCI optimization transaction
messages, which will generate a 64 bits message instead of two messages
of 32 bits.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/3f1120f7c6003b38ec8b851fc68936007c4d9fd8.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dw-edma/dw-edma-v0-core.c    | 254 +++++++++++++++++++++++--------
 drivers/dma/dw-edma/dw-edma-v0-debugfs.c |  48 +++---
 drivers/dma/dw-edma/dw-edma-v0-regs.h    | 149 +++++++++++++-----
 3 files changed, 326 insertions(+), 125 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/dw-edma/dw-edma-v0-core.c b/drivers/dma/dw-edma/dw-edma-v0-core.c
index 692de47b1670..7888eda52845 100644
--- a/drivers/dma/dw-edma/dw-edma-v0-core.c
+++ b/drivers/dma/dw-edma/dw-edma-v0-core.c
@@ -28,29 +28,69 @@ static inline struct dw_edma_v0_regs __iomem *__dw_regs(struct dw_edma *dw)
 	return dw->rg_region.vaddr;
 }
 
-#define SET(dw, name, value)				\
+#define SET_32(dw, name, value)				\
 	writel(value, &(__dw_regs(dw)->name))
 
-#define GET(dw, name)					\
+#define GET_32(dw, name)				\
 	readl(&(__dw_regs(dw)->name))
 
-#define SET_RW(dw, dir, name, value)			\
+#define SET_RW_32(dw, dir, name, value)			\
 	do {						\
 		if ((dir) == EDMA_DIR_WRITE)		\
-			SET(dw, wr_##name, value);	\
+			SET_32(dw, wr_##name, value);	\
 		else					\
-			SET(dw, rd_##name, value);	\
+			SET_32(dw, rd_##name, value);	\
 	} while (0)
 
-#define GET_RW(dw, dir, name)				\
+#define GET_RW_32(dw, dir, name)			\
 	((dir) == EDMA_DIR_WRITE			\
-	  ? GET(dw, wr_##name)				\
-	  : GET(dw, rd_##name))
+	  ? GET_32(dw, wr_##name)			\
+	  : GET_32(dw, rd_##name))
 
-#define SET_BOTH(dw, name, value)			\
+#define SET_BOTH_32(dw, name, value)			\
 	do {						\
-		SET(dw, wr_##name, value);		\
-		SET(dw, rd_##name, value);		\
+		SET_32(dw, wr_##name, value);		\
+		SET_32(dw, rd_##name, value);		\
+	} while (0)
+
+#ifdef CONFIG_64BIT
+
+#define SET_64(dw, name, value)				\
+	writeq(value, &(__dw_regs(dw)->name))
+
+#define GET_64(dw, name)				\
+	readq(&(__dw_regs(dw)->name))
+
+#define SET_RW_64(dw, dir, name, value)			\
+	do {						\
+		if ((dir) == EDMA_DIR_WRITE)		\
+			SET_64(dw, wr_##name, value);	\
+		else					\
+			SET_64(dw, rd_##name, value);	\
+	} while (0)
+
+#define GET_RW_64(dw, dir, name)			\
+	((dir) == EDMA_DIR_WRITE			\
+	  ? GET_64(dw, wr_##name)			\
+	  : GET_64(dw, rd_##name))
+
+#define SET_BOTH_64(dw, name, value)			\
+	do {						\
+		SET_64(dw, wr_##name, value);		\
+		SET_64(dw, rd_##name, value);		\
+	} while (0)
+
+#endif /* CONFIG_64BIT */
+
+#define SET_COMPAT(dw, name, value)			\
+	writel(value, &(__dw_regs(dw)->type.unroll.name))
+
+#define SET_RW_COMPAT(dw, dir, name, value)		\
+	do {						\
+		if ((dir) == EDMA_DIR_WRITE)		\
+			SET_COMPAT(dw, wr_##name, value); \
+		else					\
+			SET_COMPAT(dw, rd_##name, value); \
 	} while (0)
 
 static inline struct dw_edma_v0_ch_regs __iomem *
@@ -115,21 +155,86 @@ static inline u32 readl_ch(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch,
 	return value;
 }
 
-#define SET_CH(dw, dir, ch, name, value) \
+#define SET_CH_32(dw, dir, ch, name, value) \
 	writel_ch(dw, dir, ch, value, &(__dw_ch_regs(dw, dir, ch)->name))
 
-#define GET_CH(dw, dir, ch, name) \
+#define GET_CH_32(dw, dir, ch, name) \
 	readl_ch(dw, dir, ch, &(__dw_ch_regs(dw, dir, ch)->name))
 
-#define SET_LL(ll, value) \
+#define SET_LL_32(ll, value) \
 	writel(value, ll)
 
+#ifdef CONFIG_64BIT
+
+static inline void writeq_ch(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch,
+			     u64 value, void __iomem *addr)
+{
+	if (dw->mf == EDMA_MF_EDMA_LEGACY) {
+		u32 viewport_sel;
+		unsigned long flags;
+
+		raw_spin_lock_irqsave(&dw->lock, flags);
+
+		viewport_sel = FIELD_PREP(EDMA_V0_VIEWPORT_MASK, ch);
+		if (dir == EDMA_DIR_READ)
+			viewport_sel |= BIT(31);
+
+		writel(viewport_sel,
+		       &(__dw_regs(dw)->type.legacy.viewport_sel));
+		writeq(value, addr);
+
+		raw_spin_unlock_irqrestore(&dw->lock, flags);
+	} else {
+		writeq(value, addr);
+	}
+}
+
+static inline u64 readq_ch(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch,
+			   const void __iomem *addr)
+{
+	u32 value;
+
+	if (dw->mf == EDMA_MF_EDMA_LEGACY) {
+		u32 viewport_sel;
+		unsigned long flags;
+
+		raw_spin_lock_irqsave(&dw->lock, flags);
+
+		viewport_sel = FIELD_PREP(EDMA_V0_VIEWPORT_MASK, ch);
+		if (dir == EDMA_DIR_READ)
+			viewport_sel |= BIT(31);
+
+		writel(viewport_sel,
+		       &(__dw_regs(dw)->type.legacy.viewport_sel));
+		value = readq(addr);
+
+		raw_spin_unlock_irqrestore(&dw->lock, flags);
+	} else {
+		value = readq(addr);
+	}
+
+	return value;
+}
+
+#define SET_CH_64(dw, dir, ch, name, value) \
+	writeq_ch(dw, dir, ch, value, &(__dw_ch_regs(dw, dir, ch)->name))
+
+#define GET_CH_64(dw, dir, ch, name) \
+	readq_ch(dw, dir, ch, &(__dw_ch_regs(dw, dir, ch)->name))
+
+#define SET_LL_64(ll, value) \
+	writeq(value, ll)
+
+#endif /* CONFIG_64BIT */
+
 /* eDMA management callbacks */
 void dw_edma_v0_core_off(struct dw_edma *dw)
 {
-	SET_BOTH(dw, int_mask, EDMA_V0_DONE_INT_MASK | EDMA_V0_ABORT_INT_MASK);
-	SET_BOTH(dw, int_clear, EDMA_V0_DONE_INT_MASK | EDMA_V0_ABORT_INT_MASK);
-	SET_BOTH(dw, engine_en, 0);
+	SET_BOTH_32(dw, int_mask,
+		    EDMA_V0_DONE_INT_MASK | EDMA_V0_ABORT_INT_MASK);
+	SET_BOTH_32(dw, int_clear,
+		    EDMA_V0_DONE_INT_MASK | EDMA_V0_ABORT_INT_MASK);
+	SET_BOTH_32(dw, engine_en, 0);
 }
 
 u16 dw_edma_v0_core_ch_count(struct dw_edma *dw, enum dw_edma_dir dir)
@@ -137,9 +242,11 @@ u16 dw_edma_v0_core_ch_count(struct dw_edma *dw, enum dw_edma_dir dir)
 	u32 num_ch;
 
 	if (dir == EDMA_DIR_WRITE)
-		num_ch = FIELD_GET(EDMA_V0_WRITE_CH_COUNT_MASK, GET(dw, ctrl));
+		num_ch = FIELD_GET(EDMA_V0_WRITE_CH_COUNT_MASK,
+				   GET_32(dw, ctrl));
 	else
-		num_ch = FIELD_GET(EDMA_V0_READ_CH_COUNT_MASK, GET(dw, ctrl));
+		num_ch = FIELD_GET(EDMA_V0_READ_CH_COUNT_MASK,
+				   GET_32(dw, ctrl));
 
 	if (num_ch > EDMA_V0_MAX_NR_CH)
 		num_ch = EDMA_V0_MAX_NR_CH;
@@ -153,7 +260,7 @@ enum dma_status dw_edma_v0_core_ch_status(struct dw_edma_chan *chan)
 	u32 tmp;
 
 	tmp = FIELD_GET(EDMA_V0_CH_STATUS_MASK,
-			GET_CH(dw, chan->dir, chan->id, ch_control1));
+			GET_CH_32(dw, chan->dir, chan->id, ch_control1));
 
 	if (tmp == 1)
 		return DMA_IN_PROGRESS;
@@ -167,26 +274,28 @@ void dw_edma_v0_core_clear_done_int(struct dw_edma_chan *chan)
 {
 	struct dw_edma *dw = chan->chip->dw;
 
-	SET_RW(dw, chan->dir, int_clear,
-	       FIELD_PREP(EDMA_V0_DONE_INT_MASK, BIT(chan->id)));
+	SET_RW_32(dw, chan->dir, int_clear,
+		  FIELD_PREP(EDMA_V0_DONE_INT_MASK, BIT(chan->id)));
 }
 
 void dw_edma_v0_core_clear_abort_int(struct dw_edma_chan *chan)
 {
 	struct dw_edma *dw = chan->chip->dw;
 
-	SET_RW(dw, chan->dir, int_clear,
-	       FIELD_PREP(EDMA_V0_ABORT_INT_MASK, BIT(chan->id)));
+	SET_RW_32(dw, chan->dir, int_clear,
+		  FIELD_PREP(EDMA_V0_ABORT_INT_MASK, BIT(chan->id)));
 }
 
 u32 dw_edma_v0_core_status_done_int(struct dw_edma *dw, enum dw_edma_dir dir)
 {
-	return FIELD_GET(EDMA_V0_DONE_INT_MASK, GET_RW(dw, dir, int_status));
+	return FIELD_GET(EDMA_V0_DONE_INT_MASK,
+			 GET_RW_32(dw, dir, int_status));
 }
 
 u32 dw_edma_v0_core_status_abort_int(struct dw_edma *dw, enum dw_edma_dir dir)
 {
-	return FIELD_GET(EDMA_V0_ABORT_INT_MASK, GET_RW(dw, dir, int_status));
+	return FIELD_GET(EDMA_V0_ABORT_INT_MASK,
+			 GET_RW_32(dw, dir, int_status));
 }
 
 static void dw_edma_v0_core_write_chunk(struct dw_edma_chunk *chunk)
@@ -209,15 +318,23 @@ static void dw_edma_v0_core_write_chunk(struct dw_edma_chunk *chunk)
 			control |= (DW_EDMA_V0_LIE | DW_EDMA_V0_RIE);
 
 		/* Channel control */
-		SET_LL(&lli[i].control, control);
+		SET_LL_32(&lli[i].control, control);
 		/* Transfer size */
-		SET_LL(&lli[i].transfer_size, child->sz);
-		/* SAR - low, high */
-		SET_LL(&lli[i].sar_low, lower_32_bits(child->sar));
-		SET_LL(&lli[i].sar_high, upper_32_bits(child->sar));
-		/* DAR - low, high */
-		SET_LL(&lli[i].dar_low, lower_32_bits(child->dar));
-		SET_LL(&lli[i].dar_high, upper_32_bits(child->dar));
+		SET_LL_32(&lli[i].transfer_size, child->sz);
+		/* SAR */
+		#ifdef CONFIG_64BIT
+			SET_LL_64(&lli[i].sar.reg, child->sar);
+		#else /* CONFIG_64BIT */
+			SET_LL_32(&lli[i].sar.lsb, lower_32_bits(child->sar));
+			SET_LL_32(&lli[i].sar.msb, upper_32_bits(child->sar));
+		#endif /* CONFIG_64BIT */
+		/* DAR */
+		#ifdef CONFIG_64BIT
+			SET_LL_64(&lli[i].dar.reg, child->dar);
+		#else /* CONFIG_64BIT */
+			SET_LL_32(&lli[i].dar.lsb, lower_32_bits(child->dar));
+			SET_LL_32(&lli[i].dar.msb, upper_32_bits(child->dar));
+		#endif /* CONFIG_64BIT */
 		i++;
 	}
 
@@ -227,10 +344,14 @@ static void dw_edma_v0_core_write_chunk(struct dw_edma_chunk *chunk)
 		control |= DW_EDMA_V0_CB;
 
 	/* Channel control */
-	SET_LL(&llp->control, control);
-	/* Linked list  - low, high */
-	SET_LL(&llp->llp_low, lower_32_bits(chunk->ll_region.paddr));
-	SET_LL(&llp->llp_high, upper_32_bits(chunk->ll_region.paddr));
+	SET_LL_32(&llp->control, control);
+	/* Linked list */
+	#ifdef CONFIG_64BIT
+		SET_LL_64(&llp->llp.reg, chunk->ll_region.paddr);
+	#else /* CONFIG_64BIT */
+		SET_LL_32(&llp->llp.lsb, lower_32_bits(chunk->ll_region.paddr));
+		SET_LL_32(&llp->llp.msb, upper_32_bits(chunk->ll_region.paddr));
+	#endif /* CONFIG_64BIT */
 }
 
 void dw_edma_v0_core_start(struct dw_edma_chunk *chunk, bool first)
@@ -243,28 +364,33 @@ void dw_edma_v0_core_start(struct dw_edma_chunk *chunk, bool first)
 
 	if (first) {
 		/* Enable engine */
-		SET_RW(dw, chan->dir, engine_en, BIT(0));
+		SET_RW_32(dw, chan->dir, engine_en, BIT(0));
 		/* Interrupt unmask - done, abort */
-		tmp = GET_RW(dw, chan->dir, int_mask);
+		tmp = GET_RW_32(dw, chan->dir, int_mask);
 		tmp &= ~FIELD_PREP(EDMA_V0_DONE_INT_MASK, BIT(chan->id));
 		tmp &= ~FIELD_PREP(EDMA_V0_ABORT_INT_MASK, BIT(chan->id));
-		SET_RW(dw, chan->dir, int_mask, tmp);
+		SET_RW_32(dw, chan->dir, int_mask, tmp);
 		/* Linked list error */
-		tmp = GET_RW(dw, chan->dir, linked_list_err_en);
+		tmp = GET_RW_32(dw, chan->dir, linked_list_err_en);
 		tmp |= FIELD_PREP(EDMA_V0_LINKED_LIST_ERR_MASK, BIT(chan->id));
-		SET_RW(dw, chan->dir, linked_list_err_en, tmp);
+		SET_RW_32(dw, chan->dir, linked_list_err_en, tmp);
 		/* Channel control */
-		SET_CH(dw, chan->dir, chan->id, ch_control1,
-		       (DW_EDMA_V0_CCS | DW_EDMA_V0_LLE));
-		/* Linked list - low, high */
-		SET_CH(dw, chan->dir, chan->id, llp_low,
-		       lower_32_bits(chunk->ll_region.paddr));
-		SET_CH(dw, chan->dir, chan->id, llp_high,
-		       upper_32_bits(chunk->ll_region.paddr));
+		SET_CH_32(dw, chan->dir, chan->id, ch_control1,
+			  (DW_EDMA_V0_CCS | DW_EDMA_V0_LLE));
+		/* Linked list */
+		#ifdef CONFIG_64BIT
+			SET_CH_64(dw, chan->dir, chan->id, llp.reg,
+				  chunk->ll_region.paddr);
+		#else /* CONFIG_64BIT */
+			SET_CH_32(dw, chan->dir, chan->id, llp.lsb,
+				  lower_32_bits(chunk->ll_region.paddr));
+			SET_CH_32(dw, chan->dir, chan->id, llp.msb,
+				  upper_32_bits(chunk->ll_region.paddr));
+		#endif /* CONFIG_64BIT */
 	}
 	/* Doorbell */
-	SET_RW(dw, chan->dir, doorbell,
-	       FIELD_PREP(EDMA_V0_DOORBELL_CH_MASK, chan->id));
+	SET_RW_32(dw, chan->dir, doorbell,
+		  FIELD_PREP(EDMA_V0_DOORBELL_CH_MASK, chan->id));
 }
 
 int dw_edma_v0_core_device_config(struct dw_edma_chan *chan)
@@ -273,31 +399,31 @@ int dw_edma_v0_core_device_config(struct dw_edma_chan *chan)
 	u32 tmp = 0;
 
 	/* MSI done addr - low, high */
-	SET_RW(dw, chan->dir, done_imwr_low, chan->msi.address_lo);
-	SET_RW(dw, chan->dir, done_imwr_high, chan->msi.address_hi);
+	SET_RW_32(dw, chan->dir, done_imwr.lsb, chan->msi.address_lo);
+	SET_RW_32(dw, chan->dir, done_imwr.msb, chan->msi.address_hi);
 	/* MSI abort addr - low, high */
-	SET_RW(dw, chan->dir, abort_imwr_low, chan->msi.address_lo);
-	SET_RW(dw, chan->dir, abort_imwr_high, chan->msi.address_hi);
+	SET_RW_32(dw, chan->dir, abort_imwr.lsb, chan->msi.address_lo);
+	SET_RW_32(dw, chan->dir, abort_imwr.msb, chan->msi.address_hi);
 	/* MSI data - low, high */
 	switch (chan->id) {
 	case 0:
 	case 1:
-		tmp = GET_RW(dw, chan->dir, ch01_imwr_data);
+		tmp = GET_RW_32(dw, chan->dir, ch01_imwr_data);
 		break;
 
 	case 2:
 	case 3:
-		tmp = GET_RW(dw, chan->dir, ch23_imwr_data);
+		tmp = GET_RW_32(dw, chan->dir, ch23_imwr_data);
 		break;
 
 	case 4:
 	case 5:
-		tmp = GET_RW(dw, chan->dir, ch45_imwr_data);
+		tmp = GET_RW_32(dw, chan->dir, ch45_imwr_data);
 		break;
 
 	case 6:
 	case 7:
-		tmp = GET_RW(dw, chan->dir, ch67_imwr_data);
+		tmp = GET_RW_32(dw, chan->dir, ch67_imwr_data);
 		break;
 	}
 
@@ -316,22 +442,22 @@ int dw_edma_v0_core_device_config(struct dw_edma_chan *chan)
 	switch (chan->id) {
 	case 0:
 	case 1:
-		SET_RW(dw, chan->dir, ch01_imwr_data, tmp);
+		SET_RW_32(dw, chan->dir, ch01_imwr_data, tmp);
 		break;
 
 	case 2:
 	case 3:
-		SET_RW(dw, chan->dir, ch23_imwr_data, tmp);
+		SET_RW_32(dw, chan->dir, ch23_imwr_data, tmp);
 		break;
 
 	case 4:
 	case 5:
-		SET_RW(dw, chan->dir, ch45_imwr_data, tmp);
+		SET_RW_32(dw, chan->dir, ch45_imwr_data, tmp);
 		break;
 
 	case 6:
 	case 7:
-		SET_RW(dw, chan->dir, ch67_imwr_data, tmp);
+		SET_RW_32(dw, chan->dir, ch67_imwr_data, tmp);
 		break;
 	}
 
diff --git a/drivers/dma/dw-edma/dw-edma-v0-debugfs.c b/drivers/dma/dw-edma/dw-edma-v0-debugfs.c
index 6f62711a4c94..a5e2783a26f5 100644
--- a/drivers/dma/dw-edma/dw-edma-v0-debugfs.c
+++ b/drivers/dma/dw-edma/dw-edma-v0-debugfs.c
@@ -114,12 +114,12 @@ static void dw_edma_debugfs_regs_ch(struct dw_edma_v0_ch_regs __iomem *regs,
 		REGISTER(ch_control1),
 		REGISTER(ch_control2),
 		REGISTER(transfer_size),
-		REGISTER(sar_low),
-		REGISTER(sar_high),
-		REGISTER(dar_low),
-		REGISTER(dar_high),
-		REGISTER(llp_low),
-		REGISTER(llp_high),
+		REGISTER(sar.lsb),
+		REGISTER(sar.msb),
+		REGISTER(dar.lsb),
+		REGISTER(dar.msb),
+		REGISTER(llp.lsb),
+		REGISTER(llp.msb),
 	};
 
 	nr_entries = ARRAY_SIZE(debugfs_regs);
@@ -132,17 +132,17 @@ static void dw_edma_debugfs_regs_wr(struct dentry *dir)
 		/* eDMA global registers */
 		WR_REGISTER(engine_en),
 		WR_REGISTER(doorbell),
-		WR_REGISTER(ch_arb_weight_low),
-		WR_REGISTER(ch_arb_weight_high),
+		WR_REGISTER(ch_arb_weight.lsb),
+		WR_REGISTER(ch_arb_weight.msb),
 		/* eDMA interrupts registers */
 		WR_REGISTER(int_status),
 		WR_REGISTER(int_mask),
 		WR_REGISTER(int_clear),
 		WR_REGISTER(err_status),
-		WR_REGISTER(done_imwr_low),
-		WR_REGISTER(done_imwr_high),
-		WR_REGISTER(abort_imwr_low),
-		WR_REGISTER(abort_imwr_high),
+		WR_REGISTER(done_imwr.lsb),
+		WR_REGISTER(done_imwr.msb),
+		WR_REGISTER(abort_imwr.lsb),
+		WR_REGISTER(abort_imwr.msb),
 		WR_REGISTER(ch01_imwr_data),
 		WR_REGISTER(ch23_imwr_data),
 		WR_REGISTER(ch45_imwr_data),
@@ -152,8 +152,8 @@ static void dw_edma_debugfs_regs_wr(struct dentry *dir)
 	const struct debugfs_entries debugfs_unroll_regs[] = {
 		/* eDMA channel context grouping */
 		WR_REGISTER_UNROLL(engine_chgroup),
-		WR_REGISTER_UNROLL(engine_hshake_cnt_low),
-		WR_REGISTER_UNROLL(engine_hshake_cnt_high),
+		WR_REGISTER_UNROLL(engine_hshake_cnt.lsb),
+		WR_REGISTER_UNROLL(engine_hshake_cnt.msb),
 		WR_REGISTER_UNROLL(ch0_pwr_en),
 		WR_REGISTER_UNROLL(ch1_pwr_en),
 		WR_REGISTER_UNROLL(ch2_pwr_en),
@@ -200,19 +200,19 @@ static void dw_edma_debugfs_regs_rd(struct dentry *dir)
 		/* eDMA global registers */
 		RD_REGISTER(engine_en),
 		RD_REGISTER(doorbell),
-		RD_REGISTER(ch_arb_weight_low),
-		RD_REGISTER(ch_arb_weight_high),
+		RD_REGISTER(ch_arb_weight.lsb),
+		RD_REGISTER(ch_arb_weight.msb),
 		/* eDMA interrupts registers */
 		RD_REGISTER(int_status),
 		RD_REGISTER(int_mask),
 		RD_REGISTER(int_clear),
-		RD_REGISTER(err_status_low),
-		RD_REGISTER(err_status_high),
+		RD_REGISTER(err_status.lsb),
+		RD_REGISTER(err_status.msb),
 		RD_REGISTER(linked_list_err_en),
-		RD_REGISTER(done_imwr_low),
-		RD_REGISTER(done_imwr_high),
-		RD_REGISTER(abort_imwr_low),
-		RD_REGISTER(abort_imwr_high),
+		RD_REGISTER(done_imwr.lsb),
+		RD_REGISTER(done_imwr.msb),
+		RD_REGISTER(abort_imwr.lsb),
+		RD_REGISTER(abort_imwr.msb),
 		RD_REGISTER(ch01_imwr_data),
 		RD_REGISTER(ch23_imwr_data),
 		RD_REGISTER(ch45_imwr_data),
@@ -221,8 +221,8 @@ static void dw_edma_debugfs_regs_rd(struct dentry *dir)
 	const struct debugfs_entries debugfs_unroll_regs[] = {
 		/* eDMA channel context grouping */
 		RD_REGISTER_UNROLL(engine_chgroup),
-		RD_REGISTER_UNROLL(engine_hshake_cnt_low),
-		RD_REGISTER_UNROLL(engine_hshake_cnt_high),
+		RD_REGISTER_UNROLL(engine_hshake_cnt.lsb),
+		RD_REGISTER_UNROLL(engine_hshake_cnt.msb),
 		RD_REGISTER_UNROLL(ch0_pwr_en),
 		RD_REGISTER_UNROLL(ch1_pwr_en),
 		RD_REGISTER_UNROLL(ch2_pwr_en),
diff --git a/drivers/dma/dw-edma/dw-edma-v0-regs.h b/drivers/dma/dw-edma/dw-edma-v0-regs.h
index dfd70e223c2f..d07151d6ecd8 100644
--- a/drivers/dma/dw-edma/dw-edma-v0-regs.h
+++ b/drivers/dma/dw-edma/dw-edma-v0-regs.h
@@ -28,30 +28,55 @@ struct dw_edma_v0_ch_regs {
 	u32 ch_control1;				/* 0x000 */
 	u32 ch_control2;				/* 0x004 */
 	u32 transfer_size;				/* 0x008 */
-	u32 sar_low;					/* 0x00c */
-	u32 sar_high;					/* 0x010 */
-	u32 dar_low;					/* 0x014 */
-	u32 dar_high;					/* 0x018 */
-	u32 llp_low;					/* 0x01c */
-	u32 llp_high;					/* 0x020 */
-};
+	union {
+		u64 reg;				/* 0x00c..0x010 */
+		struct {
+			u32 lsb;			/* 0x00c */
+			u32 msb;			/* 0x010 */
+		};
+	} sar;
+	union {
+		u64 reg;				/* 0x014..0x018 */
+		struct {
+			u32 lsb;			/* 0x014 */
+			u32 msb;			/* 0x018 */
+		};
+	} dar;
+	union {
+		u64 reg;				/* 0x01c..0x020 */
+		struct {
+			u32 lsb;			/* 0x01c */
+			u32 msb;			/* 0x020 */
+		};
+	} llp;
+} __packed;
 
 struct dw_edma_v0_ch {
 	struct dw_edma_v0_ch_regs wr;			/* 0x200 */
 	u32 padding_1[55];				/* [0x224..0x2fc] */
 	struct dw_edma_v0_ch_regs rd;			/* 0x300 */
 	u32 padding_2[55];				/* [0x324..0x3fc] */
-};
+} __packed;
 
 struct dw_edma_v0_unroll {
 	u32 padding_1;					/* 0x0f8 */
 	u32 wr_engine_chgroup;				/* 0x100 */
 	u32 rd_engine_chgroup;				/* 0x104 */
-	u32 wr_engine_hshake_cnt_low;			/* 0x108 */
-	u32 wr_engine_hshake_cnt_high;			/* 0x10c */
+	union {
+		u64 reg;				/* 0x108..0x10c */
+		struct {
+			u32 lsb;			/* 0x108 */
+			u32 msb;			/* 0x10c */
+		};
+	} wr_engine_hshake_cnt;
 	u32 padding_2[2];				/* [0x110..0x114] */
-	u32 rd_engine_hshake_cnt_low;			/* 0x118 */
-	u32 rd_engine_hshake_cnt_high;			/* 0x11c */
+	union {
+		u64 reg;				/* 0x120..0x124 */
+		struct {
+			u32 lsb;			/* 0x120 */
+			u32 msb;			/* 0x124 */
+		};
+	} rd_engine_hshake_cnt;
 	u32 padding_3[2];				/* [0x120..0x124] */
 	u32 wr_ch0_pwr_en;				/* 0x128 */
 	u32 wr_ch1_pwr_en;				/* 0x12c */
@@ -72,12 +97,12 @@ struct dw_edma_v0_unroll {
 	u32 rd_ch7_pwr_en;				/* 0x184 */
 	u32 padding_5[30];				/* [0x188..0x1fc] */
 	struct dw_edma_v0_ch ch[EDMA_V0_MAX_NR_CH];	/* [0x200..0x1120] */
-};
+} __packed;
 
 struct dw_edma_v0_legacy {
 	u32 viewport_sel;				/* 0x0f8 */
 	struct dw_edma_v0_ch_regs ch;			/* [0x100..0x120] */
-};
+} __packed;
 
 struct dw_edma_v0_regs {
 	/* eDMA global registers */
@@ -87,14 +112,24 @@ struct dw_edma_v0_regs {
 	u32 wr_engine_en;				/* 0x00c */
 	u32 wr_doorbell;				/* 0x010 */
 	u32 padding_2;					/* 0x014 */
-	u32 wr_ch_arb_weight_low;			/* 0x018 */
-	u32 wr_ch_arb_weight_high;			/* 0x01c */
+	union {
+		u64 reg;				/* 0x018..0x01c */
+		struct {
+			u32 lsb;			/* 0x018 */
+			u32 msb;			/* 0x01c */
+		};
+	} wr_ch_arb_weight;
 	u32 padding_3[3];				/* [0x020..0x028] */
 	u32 rd_engine_en;				/* 0x02c */
 	u32 rd_doorbell;				/* 0x030 */
 	u32 padding_4;					/* 0x034 */
-	u32 rd_ch_arb_weight_low;			/* 0x038 */
-	u32 rd_ch_arb_weight_high;			/* 0x03c */
+	union {
+		u64 reg;				/* 0x038..0x03c */
+		struct {
+			u32 lsb;			/* 0x038 */
+			u32 msb;			/* 0x03c */
+		};
+	} rd_ch_arb_weight;
 	u32 padding_5[3];				/* [0x040..0x048] */
 	/* eDMA interrupts registers */
 	u32 wr_int_status;				/* 0x04c */
@@ -102,10 +137,20 @@ struct dw_edma_v0_regs {
 	u32 wr_int_mask;				/* 0x054 */
 	u32 wr_int_clear;				/* 0x058 */
 	u32 wr_err_status;				/* 0x05c */
-	u32 wr_done_imwr_low;				/* 0x060 */
-	u32 wr_done_imwr_high;				/* 0x064 */
-	u32 wr_abort_imwr_low;				/* 0x068 */
-	u32 wr_abort_imwr_high;				/* 0x06c */
+	union {
+		u64 reg;				/* 0x060..0x064 */
+		struct {
+			u32 lsb;			/* 0x060 */
+			u32 msb;			/* 0x064 */
+		};
+	} wr_done_imwr;
+	union {
+		u64 reg;				/* 0x068..0x06c */
+		struct {
+			u32 lsb;			/* 0x068 */
+			u32 msb;			/* 0x06c */
+		};
+	} wr_abort_imwr;
 	u32 wr_ch01_imwr_data;				/* 0x070 */
 	u32 wr_ch23_imwr_data;				/* 0x074 */
 	u32 wr_ch45_imwr_data;				/* 0x078 */
@@ -118,15 +163,30 @@ struct dw_edma_v0_regs {
 	u32 rd_int_mask;				/* 0x0a8 */
 	u32 rd_int_clear;				/* 0x0ac */
 	u32 padding_10;					/* 0x0b0 */
-	u32 rd_err_status_low;				/* 0x0b4 */
-	u32 rd_err_status_high;				/* 0x0b8 */
+	union {
+		u64 reg;				/* 0x0b4..0x0b8 */
+		struct {
+			u32 lsb;			/* 0x0b4 */
+			u32 msb;			/* 0x0b8 */
+		};
+	} rd_err_status;
 	u32 padding_11[2];				/* [0x0bc..0x0c0] */
 	u32 rd_linked_list_err_en;			/* 0x0c4 */
 	u32 padding_12;					/* 0x0c8 */
-	u32 rd_done_imwr_low;				/* 0x0cc */
-	u32 rd_done_imwr_high;				/* 0x0d0 */
-	u32 rd_abort_imwr_low;				/* 0x0d4 */
-	u32 rd_abort_imwr_high;				/* 0x0d8 */
+	union {
+		u64 reg;				/* 0x0cc..0x0d0 */
+		struct {
+			u32 lsb;			/* 0x0cc */
+			u32 msb;			/* 0x0d0 */
+		};
+	} rd_done_imwr;
+	union {
+		u64 reg;				/* 0x0d4..0x0d8 */
+		struct {
+			u32 lsb;			/* 0x0d4 */
+			u32 msb;			/* 0x0d8 */
+		};
+	} rd_abort_imwr;
 	u32 rd_ch01_imwr_data;				/* 0x0dc */
 	u32 rd_ch23_imwr_data;				/* 0x0e0 */
 	u32 rd_ch45_imwr_data;				/* 0x0e4 */
@@ -137,22 +197,37 @@ struct dw_edma_v0_regs {
 		struct dw_edma_v0_legacy legacy;	/* [0x0f8..0x120] */
 		struct dw_edma_v0_unroll unroll;	/* [0x0f8..0x1120] */
 	} type;
-};
+} __packed;
 
 struct dw_edma_v0_lli {
 	u32 control;
 	u32 transfer_size;
-	u32 sar_low;
-	u32 sar_high;
-	u32 dar_low;
-	u32 dar_high;
-};
+	union {
+		u64 reg;
+		struct {
+			u32 lsb;
+			u32 msb;
+		};
+	} sar;
+	union {
+		u64 reg;
+		struct {
+			u32 lsb;
+			u32 msb;
+		};
+	} dar;
+} __packed;
 
 struct dw_edma_v0_llp {
 	u32 control;
 	u32 reserved;
-	u32 llp_low;
-	u32 llp_high;
-};
+	union {
+		u64 reg;
+		struct {
+			u32 lsb;
+			u32 msb;
+		};
+	} llp;
+} __packed;
 
 #endif /* _DW_EDMA_V0_REGS_H */
-- 
cgit v1.2.3


From b79f17517ad8c928c3acb1c89bcca9e242b29c84 Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 18 Feb 2021 20:03:56 +0100
Subject: dmaengine: dw-edma: Fix comments offset characters' alignment

Fix comments offset characters' alignment to follow the same structure
of similar comments.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/8e0e1e46e1c1a78fe62d08c4ee09fb96254a9393.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dw-edma/dw-edma-v0-regs.h | 214 +++++++++++++++++-----------------
 1 file changed, 107 insertions(+), 107 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/dw-edma/dw-edma-v0-regs.h b/drivers/dma/dw-edma/dw-edma-v0-regs.h
index d07151d6ecd8..e175f7b20480 100644
--- a/drivers/dma/dw-edma/dw-edma-v0-regs.h
+++ b/drivers/dma/dw-edma/dw-edma-v0-regs.h
@@ -25,177 +25,177 @@
 #define EDMA_V0_CH_EVEN_MSI_DATA_MASK			GENMASK(15, 0)
 
 struct dw_edma_v0_ch_regs {
-	u32 ch_control1;				/* 0x000 */
-	u32 ch_control2;				/* 0x004 */
-	u32 transfer_size;				/* 0x008 */
+	u32 ch_control1;				/* 0x0000 */
+	u32 ch_control2;				/* 0x0004 */
+	u32 transfer_size;				/* 0x0008 */
 	union {
-		u64 reg;				/* 0x00c..0x010 */
+		u64 reg;				/* 0x000c..0x0010 */
 		struct {
-			u32 lsb;			/* 0x00c */
-			u32 msb;			/* 0x010 */
+			u32 lsb;			/* 0x000c */
+			u32 msb;			/* 0x0010 */
 		};
 	} sar;
 	union {
-		u64 reg;				/* 0x014..0x018 */
+		u64 reg;				/* 0x0014..0x0018 */
 		struct {
-			u32 lsb;			/* 0x014 */
-			u32 msb;			/* 0x018 */
+			u32 lsb;			/* 0x0014 */
+			u32 msb;			/* 0x0018 */
 		};
 	} dar;
 	union {
-		u64 reg;				/* 0x01c..0x020 */
+		u64 reg;				/* 0x001c..0x0020 */
 		struct {
-			u32 lsb;			/* 0x01c */
-			u32 msb;			/* 0x020 */
+			u32 lsb;			/* 0x001c */
+			u32 msb;			/* 0x0020 */
 		};
 	} llp;
 } __packed;
 
 struct dw_edma_v0_ch {
-	struct dw_edma_v0_ch_regs wr;			/* 0x200 */
-	u32 padding_1[55];				/* [0x224..0x2fc] */
-	struct dw_edma_v0_ch_regs rd;			/* 0x300 */
-	u32 padding_2[55];				/* [0x324..0x3fc] */
+	struct dw_edma_v0_ch_regs wr;			/* 0x0200 */
+	u32 padding_1[55];				/* 0x0224..0x02fc */
+	struct dw_edma_v0_ch_regs rd;			/* 0x0300 */
+	u32 padding_2[55];				/* 0x0324..0x03fc */
 } __packed;
 
 struct dw_edma_v0_unroll {
-	u32 padding_1;					/* 0x0f8 */
-	u32 wr_engine_chgroup;				/* 0x100 */
-	u32 rd_engine_chgroup;				/* 0x104 */
+	u32 padding_1;					/* 0x00f8 */
+	u32 wr_engine_chgroup;				/* 0x0100 */
+	u32 rd_engine_chgroup;				/* 0x0104 */
 	union {
-		u64 reg;				/* 0x108..0x10c */
+		u64 reg;				/* 0x0108..0x010c */
 		struct {
-			u32 lsb;			/* 0x108 */
-			u32 msb;			/* 0x10c */
+			u32 lsb;			/* 0x0108 */
+			u32 msb;			/* 0x010c */
 		};
 	} wr_engine_hshake_cnt;
-	u32 padding_2[2];				/* [0x110..0x114] */
+	u32 padding_2[2];				/* 0x0110..0x0114 */
 	union {
-		u64 reg;				/* 0x120..0x124 */
+		u64 reg;				/* 0x0120..0x0124 */
 		struct {
-			u32 lsb;			/* 0x120 */
-			u32 msb;			/* 0x124 */
+			u32 lsb;			/* 0x0120 */
+			u32 msb;			/* 0x0124 */
 		};
 	} rd_engine_hshake_cnt;
-	u32 padding_3[2];				/* [0x120..0x124] */
-	u32 wr_ch0_pwr_en;				/* 0x128 */
-	u32 wr_ch1_pwr_en;				/* 0x12c */
-	u32 wr_ch2_pwr_en;				/* 0x130 */
-	u32 wr_ch3_pwr_en;				/* 0x134 */
-	u32 wr_ch4_pwr_en;				/* 0x138 */
-	u32 wr_ch5_pwr_en;				/* 0x13c */
-	u32 wr_ch6_pwr_en;				/* 0x140 */
-	u32 wr_ch7_pwr_en;				/* 0x144 */
-	u32 padding_4[8];				/* [0x148..0x164] */
-	u32 rd_ch0_pwr_en;				/* 0x168 */
-	u32 rd_ch1_pwr_en;				/* 0x16c */
-	u32 rd_ch2_pwr_en;				/* 0x170 */
-	u32 rd_ch3_pwr_en;				/* 0x174 */
-	u32 rd_ch4_pwr_en;				/* 0x178 */
-	u32 rd_ch5_pwr_en;				/* 0x18c */
-	u32 rd_ch6_pwr_en;				/* 0x180 */
-	u32 rd_ch7_pwr_en;				/* 0x184 */
-	u32 padding_5[30];				/* [0x188..0x1fc] */
-	struct dw_edma_v0_ch ch[EDMA_V0_MAX_NR_CH];	/* [0x200..0x1120] */
+	u32 padding_3[2];				/* 0x0120..0x0124 */
+	u32 wr_ch0_pwr_en;				/* 0x0128 */
+	u32 wr_ch1_pwr_en;				/* 0x012c */
+	u32 wr_ch2_pwr_en;				/* 0x0130 */
+	u32 wr_ch3_pwr_en;				/* 0x0134 */
+	u32 wr_ch4_pwr_en;				/* 0x0138 */
+	u32 wr_ch5_pwr_en;				/* 0x013c */
+	u32 wr_ch6_pwr_en;				/* 0x0140 */
+	u32 wr_ch7_pwr_en;				/* 0x0144 */
+	u32 padding_4[8];				/* 0x0148..0x0164 */
+	u32 rd_ch0_pwr_en;				/* 0x0168 */
+	u32 rd_ch1_pwr_en;				/* 0x016c */
+	u32 rd_ch2_pwr_en;				/* 0x0170 */
+	u32 rd_ch3_pwr_en;				/* 0x0174 */
+	u32 rd_ch4_pwr_en;				/* 0x0178 */
+	u32 rd_ch5_pwr_en;				/* 0x018c */
+	u32 rd_ch6_pwr_en;				/* 0x0180 */
+	u32 rd_ch7_pwr_en;				/* 0x0184 */
+	u32 padding_5[30];				/* 0x0188..0x01fc */
+	struct dw_edma_v0_ch ch[EDMA_V0_MAX_NR_CH];	/* 0x0200..0x1120 */
 } __packed;
 
 struct dw_edma_v0_legacy {
-	u32 viewport_sel;				/* 0x0f8 */
-	struct dw_edma_v0_ch_regs ch;			/* [0x100..0x120] */
+	u32 viewport_sel;				/* 0x00f8 */
+	struct dw_edma_v0_ch_regs ch;			/* 0x0100..0x0120 */
 } __packed;
 
 struct dw_edma_v0_regs {
 	/* eDMA global registers */
-	u32 ctrl_data_arb_prior;			/* 0x000 */
-	u32 padding_1;					/* 0x004 */
-	u32 ctrl;					/* 0x008 */
-	u32 wr_engine_en;				/* 0x00c */
-	u32 wr_doorbell;				/* 0x010 */
-	u32 padding_2;					/* 0x014 */
+	u32 ctrl_data_arb_prior;			/* 0x0000 */
+	u32 padding_1;					/* 0x0004 */
+	u32 ctrl;					/* 0x0008 */
+	u32 wr_engine_en;				/* 0x000c */
+	u32 wr_doorbell;				/* 0x0010 */
+	u32 padding_2;					/* 0x0014 */
 	union {
-		u64 reg;				/* 0x018..0x01c */
+		u64 reg;				/* 0x0018..0x001c */
 		struct {
-			u32 lsb;			/* 0x018 */
-			u32 msb;			/* 0x01c */
+			u32 lsb;			/* 0x0018 */
+			u32 msb;			/* 0x001c */
 		};
 	} wr_ch_arb_weight;
-	u32 padding_3[3];				/* [0x020..0x028] */
-	u32 rd_engine_en;				/* 0x02c */
-	u32 rd_doorbell;				/* 0x030 */
-	u32 padding_4;					/* 0x034 */
+	u32 padding_3[3];				/* 0x0020..0x0028 */
+	u32 rd_engine_en;				/* 0x002c */
+	u32 rd_doorbell;				/* 0x0030 */
+	u32 padding_4;					/* 0x0034 */
 	union {
-		u64 reg;				/* 0x038..0x03c */
+		u64 reg;				/* 0x0038..0x003c */
 		struct {
-			u32 lsb;			/* 0x038 */
-			u32 msb;			/* 0x03c */
+			u32 lsb;			/* 0x0038 */
+			u32 msb;			/* 0x003c */
 		};
 	} rd_ch_arb_weight;
-	u32 padding_5[3];				/* [0x040..0x048] */
+	u32 padding_5[3];				/* 0x0040..0x0048 */
 	/* eDMA interrupts registers */
-	u32 wr_int_status;				/* 0x04c */
-	u32 padding_6;					/* 0x050 */
-	u32 wr_int_mask;				/* 0x054 */
-	u32 wr_int_clear;				/* 0x058 */
-	u32 wr_err_status;				/* 0x05c */
+	u32 wr_int_status;				/* 0x004c */
+	u32 padding_6;					/* 0x0050 */
+	u32 wr_int_mask;				/* 0x0054 */
+	u32 wr_int_clear;				/* 0x0058 */
+	u32 wr_err_status;				/* 0x005c */
 	union {
-		u64 reg;				/* 0x060..0x064 */
+		u64 reg;				/* 0x0060..0x0064 */
 		struct {
-			u32 lsb;			/* 0x060 */
-			u32 msb;			/* 0x064 */
+			u32 lsb;			/* 0x0060 */
+			u32 msb;			/* 0x0064 */
 		};
 	} wr_done_imwr;
 	union {
-		u64 reg;				/* 0x068..0x06c */
+		u64 reg;				/* 0x0068..0x006c */
 		struct {
-			u32 lsb;			/* 0x068 */
-			u32 msb;			/* 0x06c */
+			u32 lsb;			/* 0x0068 */
+			u32 msb;			/* 0x006c */
 		};
 	} wr_abort_imwr;
-	u32 wr_ch01_imwr_data;				/* 0x070 */
-	u32 wr_ch23_imwr_data;				/* 0x074 */
-	u32 wr_ch45_imwr_data;				/* 0x078 */
-	u32 wr_ch67_imwr_data;				/* 0x07c */
-	u32 padding_7[4];				/* [0x080..0x08c] */
-	u32 wr_linked_list_err_en;			/* 0x090 */
-	u32 padding_8[3];				/* [0x094..0x09c] */
-	u32 rd_int_status;				/* 0x0a0 */
-	u32 padding_9;					/* 0x0a4 */
-	u32 rd_int_mask;				/* 0x0a8 */
-	u32 rd_int_clear;				/* 0x0ac */
-	u32 padding_10;					/* 0x0b0 */
+	u32 wr_ch01_imwr_data;				/* 0x0070 */
+	u32 wr_ch23_imwr_data;				/* 0x0074 */
+	u32 wr_ch45_imwr_data;				/* 0x0078 */
+	u32 wr_ch67_imwr_data;				/* 0x007c */
+	u32 padding_7[4];				/* 0x0080..0x008c */
+	u32 wr_linked_list_err_en;			/* 0x0090 */
+	u32 padding_8[3];				/* 0x0094..0x009c */
+	u32 rd_int_status;				/* 0x00a0 */
+	u32 padding_9;					/* 0x00a4 */
+	u32 rd_int_mask;				/* 0x00a8 */
+	u32 rd_int_clear;				/* 0x00ac */
+	u32 padding_10;					/* 0x00b0 */
 	union {
-		u64 reg;				/* 0x0b4..0x0b8 */
+		u64 reg;				/* 0x00b4..0x00b8 */
 		struct {
-			u32 lsb;			/* 0x0b4 */
-			u32 msb;			/* 0x0b8 */
+			u32 lsb;			/* 0x00b4 */
+			u32 msb;			/* 0x00b8 */
 		};
 	} rd_err_status;
-	u32 padding_11[2];				/* [0x0bc..0x0c0] */
-	u32 rd_linked_list_err_en;			/* 0x0c4 */
-	u32 padding_12;					/* 0x0c8 */
+	u32 padding_11[2];				/* 0x00bc..0x00c0 */
+	u32 rd_linked_list_err_en;			/* 0x00c4 */
+	u32 padding_12;					/* 0x00c8 */
 	union {
-		u64 reg;				/* 0x0cc..0x0d0 */
+		u64 reg;				/* 0x00cc..0x00d0 */
 		struct {
-			u32 lsb;			/* 0x0cc */
-			u32 msb;			/* 0x0d0 */
+			u32 lsb;			/* 0x00cc */
+			u32 msb;			/* 0x00d0 */
 		};
 	} rd_done_imwr;
 	union {
-		u64 reg;				/* 0x0d4..0x0d8 */
+		u64 reg;				/* 0x00d4..0x00d8 */
 		struct {
-			u32 lsb;			/* 0x0d4 */
-			u32 msb;			/* 0x0d8 */
+			u32 lsb;			/* 0x00d4 */
+			u32 msb;			/* 0x00d8 */
 		};
 	} rd_abort_imwr;
-	u32 rd_ch01_imwr_data;				/* 0x0dc */
-	u32 rd_ch23_imwr_data;				/* 0x0e0 */
-	u32 rd_ch45_imwr_data;				/* 0x0e4 */
-	u32 rd_ch67_imwr_data;				/* 0x0e8 */
-	u32 padding_13[4];				/* [0x0ec..0x0f8] */
+	u32 rd_ch01_imwr_data;				/* 0x00dc */
+	u32 rd_ch23_imwr_data;				/* 0x00e0 */
+	u32 rd_ch45_imwr_data;				/* 0x00e4 */
+	u32 rd_ch67_imwr_data;				/* 0x00e8 */
+	u32 padding_13[4];				/* 0x00ec..0x00f8 */
 	/* eDMA channel context grouping */
 	union dw_edma_v0_type {
-		struct dw_edma_v0_legacy legacy;	/* [0x0f8..0x120] */
-		struct dw_edma_v0_unroll unroll;	/* [0x0f8..0x1120] */
+		struct dw_edma_v0_legacy legacy;	/* 0x00f8..0x0120 */
+		struct dw_edma_v0_unroll unroll;	/* 0x00f8..0x1120 */
 	} type;
 } __packed;
 
-- 
cgit v1.2.3


From e0c1d53891c43a70c9fa85ddb3174ab5afd7e2ec Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 18 Feb 2021 20:03:57 +0100
Subject: dmaengine: dw-edma: Add support for the HDMA feature

Add support for the HDMA feature.

This new feature enables the current eDMA IP to use a deeper prefetch
of the linked list, which reduces the algorithm execution latency
observed when loading the elements of the list, causing more stable
and higher data transfer.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/5f40f89ef7d6255a12d5b23f34e6e59dcd28861e.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dw-edma/dw-edma-core.h       | 10 ++++----
 drivers/dma/dw-edma/dw-edma-pcie.c       | 23 ++++++++---------
 drivers/dma/dw-edma/dw-edma-v0-core.c    | 42 +++++++++++++++++++++++++++++---
 drivers/dma/dw-edma/dw-edma-v0-debugfs.c |  9 +++----
 4 files changed, 60 insertions(+), 24 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/dw-edma/dw-edma-core.h b/drivers/dma/dw-edma/dw-edma-core.h
index 31fc50d31792..3f9593ede881 100644
--- a/drivers/dma/dw-edma/dw-edma-core.h
+++ b/drivers/dma/dw-edma/dw-edma-core.h
@@ -21,9 +21,10 @@ enum dw_edma_dir {
 	EDMA_DIR_READ
 };
 
-enum dw_edma_mode {
-	EDMA_MODE_LEGACY = 0,
-	EDMA_MODE_UNROLL
+enum dw_edma_map_format {
+	EDMA_MF_EDMA_LEGACY = 0x0,
+	EDMA_MF_EDMA_UNROLL = 0x1,
+	EDMA_MF_HDMA_COMPAT = 0x5
 };
 
 enum dw_edma_request {
@@ -123,8 +124,7 @@ struct dw_edma {
 	struct dw_edma_irq		*irq;
 	int				nr_irqs;
 
-	u32				version;
-	enum dw_edma_mode		mode;
+	enum dw_edma_map_format		mf;
 
 	struct dw_edma_chan		*chan;
 	const struct dw_edma_core_ops	*ops;
diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c
index 1eafc602e17e..c130549d3262 100644
--- a/drivers/dma/dw-edma/dw-edma-pcie.c
+++ b/drivers/dma/dw-edma/dw-edma-pcie.c
@@ -30,8 +30,7 @@ struct dw_edma_pcie_data {
 	off_t				dt_off;
 	size_t				dt_sz;
 	/* Other */
-	u32				version;
-	enum dw_edma_mode		mode;
+	enum dw_edma_map_format		mf;
 	u8				irqs;
 };
 
@@ -49,8 +48,7 @@ static const struct dw_edma_pcie_data snps_edda_data = {
 	.dt_off				= 0x00800000,	/*  8 Mbytes */
 	.dt_sz				= 0x03800000,	/* 56 Mbytes */
 	/* Other */
-	.version			= 0,
-	.mode				= EDMA_MODE_UNROLL,
+	.mf				= EDMA_MF_EDMA_UNROLL,
 	.irqs				= 1,
 };
 
@@ -69,8 +67,8 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	const struct dw_edma_pcie_data *pdata = (void *)pid->driver_data;
 	struct device *dev = &pdev->dev;
 	struct dw_edma_chip *chip;
-	int err, nr_irqs;
 	struct dw_edma *dw;
+	int err, nr_irqs;
 
 	/* Enable PCI device */
 	err = pcim_enable_device(pdev);
@@ -157,16 +155,19 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	dw->dt_region.paddr += pdata->dt_off;
 	dw->dt_region.sz = pdata->dt_sz;
 
-	dw->version = pdata->version;
-	dw->mode = pdata->mode;
+	dw->mf = pdata->mf;
 	dw->nr_irqs = nr_irqs;
 	dw->ops = &dw_edma_pcie_core_ops;
 
 	/* Debug info */
-	pci_dbg(pdev, "Version:\t%u\n", dw->version);
-
-	pci_dbg(pdev, "Mode:\t%s\n",
-		dw->mode == EDMA_MODE_LEGACY ? "Legacy" : "Unroll");
+	if (dw->mf == EDMA_MF_EDMA_LEGACY)
+		pci_dbg(pdev, "Version:\teDMA Port Logic (0x%x)\n", dw->mf);
+	else if (dw->mf == EDMA_MF_EDMA_UNROLL)
+		pci_dbg(pdev, "Version:\teDMA Unroll (0x%x)\n", dw->mf);
+	else if (dw->mf == EDMA_MF_HDMA_COMPAT)
+		pci_dbg(pdev, "Version:\tHDMA Compatible (0x%x)\n", dw->mf);
+	else
+		pci_dbg(pdev, "Version:\tUnknown (0x%x)\n", dw->mf);
 
 	pci_dbg(pdev, "Registers:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
 		pdata->rg_bar, pdata->rg_off, pdata->rg_sz,
diff --git a/drivers/dma/dw-edma/dw-edma-v0-core.c b/drivers/dma/dw-edma/dw-edma-v0-core.c
index 7888eda52845..5b0541a3a094 100644
--- a/drivers/dma/dw-edma/dw-edma-v0-core.c
+++ b/drivers/dma/dw-edma/dw-edma-v0-core.c
@@ -96,7 +96,7 @@ static inline struct dw_edma_v0_regs __iomem *__dw_regs(struct dw_edma *dw)
 static inline struct dw_edma_v0_ch_regs __iomem *
 __dw_ch_regs(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch)
 {
-	if (dw->mode == EDMA_MODE_LEGACY)
+	if (dw->mf == EDMA_MF_EDMA_LEGACY)
 		return &(__dw_regs(dw)->type.legacy.ch);
 
 	if (dir == EDMA_DIR_WRITE)
@@ -108,7 +108,7 @@ __dw_ch_regs(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch)
 static inline void writel_ch(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch,
 			     u32 value, void __iomem *addr)
 {
-	if (dw->mode == EDMA_MODE_LEGACY) {
+	if (dw->mf == EDMA_MF_EDMA_LEGACY) {
 		u32 viewport_sel;
 		unsigned long flags;
 
@@ -133,7 +133,7 @@ static inline u32 readl_ch(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch,
 {
 	u32 value;
 
-	if (dw->mode == EDMA_MODE_LEGACY) {
+	if (dw->mf == EDMA_MF_EDMA_LEGACY) {
 		u32 viewport_sel;
 		unsigned long flags;
 
@@ -365,6 +365,42 @@ void dw_edma_v0_core_start(struct dw_edma_chunk *chunk, bool first)
 	if (first) {
 		/* Enable engine */
 		SET_RW_32(dw, chan->dir, engine_en, BIT(0));
+		if (dw->mf == EDMA_MF_HDMA_COMPAT) {
+			switch (chan->id) {
+			case 0:
+				SET_RW_COMPAT(dw, chan->dir, ch0_pwr_en,
+					      BIT(0));
+				break;
+			case 1:
+				SET_RW_COMPAT(dw, chan->dir, ch1_pwr_en,
+					      BIT(0));
+				break;
+			case 2:
+				SET_RW_COMPAT(dw, chan->dir, ch2_pwr_en,
+					      BIT(0));
+				break;
+			case 3:
+				SET_RW_COMPAT(dw, chan->dir, ch3_pwr_en,
+					      BIT(0));
+				break;
+			case 4:
+				SET_RW_COMPAT(dw, chan->dir, ch4_pwr_en,
+					      BIT(0));
+				break;
+			case 5:
+				SET_RW_COMPAT(dw, chan->dir, ch5_pwr_en,
+					      BIT(0));
+				break;
+			case 6:
+				SET_RW_COMPAT(dw, chan->dir, ch6_pwr_en,
+					      BIT(0));
+				break;
+			case 7:
+				SET_RW_COMPAT(dw, chan->dir, ch7_pwr_en,
+					      BIT(0));
+				break;
+			}
+		}
 		/* Interrupt unmask - done, abort */
 		tmp = GET_RW_32(dw, chan->dir, int_mask);
 		tmp &= ~FIELD_PREP(EDMA_V0_DONE_INT_MASK, BIT(chan->id));
diff --git a/drivers/dma/dw-edma/dw-edma-v0-debugfs.c b/drivers/dma/dw-edma/dw-edma-v0-debugfs.c
index a5e2783a26f5..157dfc2e2430 100644
--- a/drivers/dma/dw-edma/dw-edma-v0-debugfs.c
+++ b/drivers/dma/dw-edma/dw-edma-v0-debugfs.c
@@ -55,7 +55,7 @@ struct debugfs_entries {
 static int dw_edma_debugfs_u32_get(void *data, u64 *val)
 {
 	void __iomem *reg = (void __force __iomem *)data;
-	if (dw->mode == EDMA_MODE_LEGACY &&
+	if (dw->mf == EDMA_MF_EDMA_LEGACY &&
 	    reg >= (void __iomem *)&regs->type.legacy.ch) {
 		void __iomem *ptr = &regs->type.legacy.ch;
 		u32 viewport_sel = 0;
@@ -174,7 +174,7 @@ static void dw_edma_debugfs_regs_wr(struct dentry *dir)
 	nr_entries = ARRAY_SIZE(debugfs_regs);
 	dw_edma_debugfs_create_x32(debugfs_regs, nr_entries, regs_dir);
 
-	if (dw->mode == EDMA_MODE_UNROLL) {
+	if (dw->mf == EDMA_MF_HDMA_COMPAT) {
 		nr_entries = ARRAY_SIZE(debugfs_unroll_regs);
 		dw_edma_debugfs_create_x32(debugfs_unroll_regs, nr_entries,
 					   regs_dir);
@@ -243,7 +243,7 @@ static void dw_edma_debugfs_regs_rd(struct dentry *dir)
 	nr_entries = ARRAY_SIZE(debugfs_regs);
 	dw_edma_debugfs_create_x32(debugfs_regs, nr_entries, regs_dir);
 
-	if (dw->mode == EDMA_MODE_UNROLL) {
+	if (dw->mf == EDMA_MF_HDMA_COMPAT) {
 		nr_entries = ARRAY_SIZE(debugfs_unroll_regs);
 		dw_edma_debugfs_create_x32(debugfs_unroll_regs, nr_entries,
 					   regs_dir);
@@ -297,8 +297,7 @@ void dw_edma_v0_debugfs_on(struct dw_edma_chip *chip)
 	if (!base_dir)
 		return;
 
-	debugfs_create_u32("version", 0444, base_dir, &dw->version);
-	debugfs_create_u32("mode", 0444, base_dir, &dw->mode);
+	debugfs_create_u32("mf", 0444, base_dir, &dw->mf);
 	debugfs_create_u16("wr_ch_cnt", 0444, base_dir, &dw->wr_ch_cnt);
 	debugfs_create_u16("rd_ch_cnt", 0444, base_dir, &dw->rd_ch_cnt);
 
-- 
cgit v1.2.3


From c124fd9a969acaa83f6dfa5e160a99a500af9e4b Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 18 Feb 2021 20:03:58 +0100
Subject: PCI: Add pci_find_vsec_capability() to find a specific VSEC

Add pci_find_vsec_capability() to locate a Vendor-Specific Extended
Capability with the specified VSEC ID.

The Vendor-Specific Extended Capability (VSEC) allows one or more
proprietary capabilities defined by the vendor which aren't standard
or shared between vendors.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/d89506834fb11c6fa0bd5d515c0dd55b13ac6958.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/pci/pci.c   | 30 ++++++++++++++++++++++++++++++
 include/linux/pci.h |  1 +
 2 files changed, 31 insertions(+)

(limited to 'drivers')

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 16a17215f633..97c0f2ec922b 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -692,6 +692,36 @@ u8 pci_find_ht_capability(struct pci_dev *dev, int ht_cap)
 }
 EXPORT_SYMBOL_GPL(pci_find_ht_capability);
 
+/**
+ * pci_find_vsec_capability - Find a vendor-specific extended capability
+ * @dev: PCI device to query
+ * @vendor: Vendor ID for which capability is defined
+ * @cap: Vendor-specific capability ID
+ *
+ * If @dev has Vendor ID @vendor, search for a VSEC capability with
+ * VSEC ID @cap. If found, return the capability offset in
+ * config space; otherwise return 0.
+ */
+u16 pci_find_vsec_capability(struct pci_dev *dev, u16 vendor, int cap)
+{
+	u16 vsec = 0;
+	u32 header;
+
+	if (vendor != dev->vendor)
+		return 0;
+
+	while ((vsec = pci_find_next_ext_capability(dev, vsec,
+						     PCI_EXT_CAP_ID_VNDR))) {
+		if (pci_read_config_dword(dev, vsec + PCI_VNDR_HEADER,
+					  &header) == PCIBIOS_SUCCESSFUL &&
+		    PCI_VNDR_HEADER_ID(header) == cap)
+			return vsec;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pci_find_vsec_capability);
+
 /**
  * pci_find_parent_resource - return resource region of parent bus of given
  *			      region
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 86c799c97b77..59e731a2d1f8 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1077,6 +1077,7 @@ u8 pci_find_next_ht_capability(struct pci_dev *dev, u8 pos, int ht_cap);
 u16 pci_find_ext_capability(struct pci_dev *dev, int cap);
 u16 pci_find_next_ext_capability(struct pci_dev *dev, u16 pos, int cap);
 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
+u16 pci_find_vsec_capability(struct pci_dev *dev, u16 vendor, int cap);
 
 u64 pci_get_dsn(struct pci_dev *dev);
 
-- 
cgit v1.2.3


From 1aef6ffe999eec7b7fdcfad7ffef9c157727ffcb Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 18 Feb 2021 20:03:59 +0100
Subject: dmaengine: dw-edma: Add PCIe VSEC data retrieval support

The latest eDMA IP development implements a Vendor-Specific Extended
Capability that contains the eDMA BAR, offset, map format, and the
number of read/write channels available.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/0b880b8893ff457ffc1b5071a1c7f47e61ceea1c.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dw-edma/dw-edma-core.c |  20 ++++---
 drivers/dma/dw-edma/dw-edma-pcie.c | 116 ++++++++++++++++++++++++++++---------
 2 files changed, 101 insertions(+), 35 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index 08d71dafa001..18a2878d2c50 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -863,15 +863,19 @@ int dw_edma_probe(struct dw_edma_chip *chip)
 
 	raw_spin_lock_init(&dw->lock);
 
-	/* Find out how many write channels are supported by hardware */
-	dw->wr_ch_cnt = dw_edma_v0_core_ch_count(dw, EDMA_DIR_WRITE);
-	if (!dw->wr_ch_cnt)
-		return -EINVAL;
+	if (!dw->wr_ch_cnt) {
+		/* Find out how many write channels are supported by hardware */
+		dw->wr_ch_cnt = dw_edma_v0_core_ch_count(dw, EDMA_DIR_WRITE);
+		if (!dw->wr_ch_cnt)
+			return -EINVAL;
+	}
 
-	/* Find out how many read channels are supported by hardware */
-	dw->rd_ch_cnt = dw_edma_v0_core_ch_count(dw, EDMA_DIR_READ);
-	if (!dw->rd_ch_cnt)
-		return -EINVAL;
+	if (!dw->rd_ch_cnt) {
+		/* Find out how many read channels are supported by hardware */
+		dw->rd_ch_cnt = dw_edma_v0_core_ch_count(dw, EDMA_DIR_READ);
+		if (!dw->rd_ch_cnt)
+			return -EINVAL;
+	}
 
 	dev_vdbg(dev, "Channels:\twrite=%d, read=%d\n",
 		 dw->wr_ch_cnt, dw->rd_ch_cnt);
diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c
index c130549d3262..eb6f8b399cc7 100644
--- a/drivers/dma/dw-edma/dw-edma-pcie.c
+++ b/drivers/dma/dw-edma/dw-edma-pcie.c
@@ -13,9 +13,16 @@
 #include <linux/dma/edma.h>
 #include <linux/pci-epf.h>
 #include <linux/msi.h>
+#include <linux/bitfield.h>
 
 #include "dw-edma-core.h"
 
+#define DW_PCIE_VSEC_DMA_ID			0x6
+#define DW_PCIE_VSEC_DMA_BAR			GENMASK(10, 8)
+#define DW_PCIE_VSEC_DMA_MAP			GENMASK(2, 0)
+#define DW_PCIE_VSEC_DMA_RD_CH			GENMASK(25, 16)
+#define DW_PCIE_VSEC_DMA_WR_CH			GENMASK(9, 0)
+
 struct dw_edma_pcie_data {
 	/* eDMA registers location */
 	enum pci_barno			rg_bar;
@@ -32,6 +39,8 @@ struct dw_edma_pcie_data {
 	/* Other */
 	enum dw_edma_map_format		mf;
 	u8				irqs;
+	u16				rd_ch_cnt;
+	u16				wr_ch_cnt;
 };
 
 static const struct dw_edma_pcie_data snps_edda_data = {
@@ -50,6 +59,8 @@ static const struct dw_edma_pcie_data snps_edda_data = {
 	/* Other */
 	.mf				= EDMA_MF_EDMA_UNROLL,
 	.irqs				= 1,
+	.rd_ch_cnt			= 0,
+	.wr_ch_cnt			= 0,
 };
 
 static int dw_edma_pcie_irq_vector(struct device *dev, unsigned int nr)
@@ -61,10 +72,51 @@ static const struct dw_edma_core_ops dw_edma_pcie_core_ops = {
 	.irq_vector = dw_edma_pcie_irq_vector,
 };
 
+static void dw_edma_pcie_get_vsec_dma_data(struct pci_dev *pdev,
+					   struct dw_edma_pcie_data *pdata)
+{
+	u32 val, map;
+	u16 vsec;
+	u64 off;
+
+	vsec = pci_find_vsec_capability(pdev, PCI_VENDOR_ID_SYNOPSYS,
+					DW_PCIE_VSEC_DMA_ID);
+	if (!vsec)
+		return;
+
+	pci_read_config_dword(pdev, vsec + PCI_VNDR_HEADER, &val);
+	if (PCI_VNDR_HEADER_REV(val) != 0x00 ||
+	    PCI_VNDR_HEADER_LEN(val) != 0x18)
+		return;
+
+	pci_dbg(pdev, "Detected PCIe Vendor-Specific Extended Capability DMA\n");
+	pci_read_config_dword(pdev, vsec + 0x8, &val);
+	map = FIELD_GET(DW_PCIE_VSEC_DMA_MAP, val);
+	if (map != EDMA_MF_EDMA_LEGACY &&
+	    map != EDMA_MF_EDMA_UNROLL &&
+	    map != EDMA_MF_HDMA_COMPAT)
+		return;
+
+	pdata->mf = map;
+	pdata->rg_bar = FIELD_GET(DW_PCIE_VSEC_DMA_BAR, val);
+
+	pci_read_config_dword(pdev, vsec + 0xc, &val);
+	pdata->rd_ch_cnt = FIELD_GET(DW_PCIE_VSEC_DMA_RD_CH, val);
+	pdata->wr_ch_cnt = FIELD_GET(DW_PCIE_VSEC_DMA_WR_CH, val);
+
+	pci_read_config_dword(pdev, vsec + 0x14, &val);
+	off = val;
+	pci_read_config_dword(pdev, vsec + 0x10, &val);
+	off <<= 32;
+	off |= val;
+	pdata->rg_off = off;
+}
+
 static int dw_edma_pcie_probe(struct pci_dev *pdev,
 			      const struct pci_device_id *pid)
 {
-	const struct dw_edma_pcie_data *pdata = (void *)pid->driver_data;
+	struct dw_edma_pcie_data *pdata = (void *)pid->driver_data;
+	struct dw_edma_pcie_data vsec_data;
 	struct device *dev = &pdev->dev;
 	struct dw_edma_chip *chip;
 	struct dw_edma *dw;
@@ -77,10 +129,18 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 		return err;
 	}
 
+	memcpy(&vsec_data, pdata, sizeof(struct dw_edma_pcie_data));
+
+	/*
+	 * Tries to find if exists a PCIe Vendor-Specific Extended Capability
+	 * for the DMA, if one exists, then reconfigures it.
+	 */
+	dw_edma_pcie_get_vsec_dma_data(pdev, &vsec_data);
+
 	/* Mapping PCI BAR regions */
-	err = pcim_iomap_regions(pdev, BIT(pdata->rg_bar) |
-				       BIT(pdata->ll_bar) |
-				       BIT(pdata->dt_bar),
+	err = pcim_iomap_regions(pdev, BIT(vsec_data.rg_bar) |
+				       BIT(vsec_data.ll_bar) |
+				       BIT(vsec_data.dt_bar),
 				 pci_name(pdev));
 	if (err) {
 		pci_err(pdev, "eDMA BAR I/O remapping failed\n");
@@ -123,7 +183,7 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 		return -ENOMEM;
 
 	/* IRQs allocation */
-	nr_irqs = pci_alloc_irq_vectors(pdev, 1, pdata->irqs,
+	nr_irqs = pci_alloc_irq_vectors(pdev, 1, vsec_data.irqs,
 					PCI_IRQ_MSI | PCI_IRQ_MSIX);
 	if (nr_irqs < 1) {
 		pci_err(pdev, "fail to alloc IRQ vector (number of IRQs=%u)\n",
@@ -137,27 +197,29 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	chip->id = pdev->devfn;
 	chip->irq = pdev->irq;
 
-	dw->rg_region.vaddr = pcim_iomap_table(pdev)[pdata->rg_bar];
-	dw->rg_region.vaddr += pdata->rg_off;
-	dw->rg_region.paddr = pdev->resource[pdata->rg_bar].start;
-	dw->rg_region.paddr += pdata->rg_off;
-	dw->rg_region.sz = pdata->rg_sz;
-
-	dw->ll_region.vaddr = pcim_iomap_table(pdev)[pdata->ll_bar];
-	dw->ll_region.vaddr += pdata->ll_off;
-	dw->ll_region.paddr = pdev->resource[pdata->ll_bar].start;
-	dw->ll_region.paddr += pdata->ll_off;
-	dw->ll_region.sz = pdata->ll_sz;
-
-	dw->dt_region.vaddr = pcim_iomap_table(pdev)[pdata->dt_bar];
-	dw->dt_region.vaddr += pdata->dt_off;
-	dw->dt_region.paddr = pdev->resource[pdata->dt_bar].start;
-	dw->dt_region.paddr += pdata->dt_off;
-	dw->dt_region.sz = pdata->dt_sz;
-
-	dw->mf = pdata->mf;
+	dw->rg_region.vaddr = pcim_iomap_table(pdev)[vsec_data.rg_bar];
+	dw->rg_region.vaddr += vsec_data.rg_off;
+	dw->rg_region.paddr = pdev->resource[vsec_data.rg_bar].start;
+	dw->rg_region.paddr += vsec_data.rg_off;
+	dw->rg_region.sz = vsec_data.rg_sz;
+
+	dw->ll_region.vaddr = pcim_iomap_table(pdev)[vsec_data.ll_bar];
+	dw->ll_region.vaddr += vsec_data.ll_off;
+	dw->ll_region.paddr = pdev->resource[vsec_data.ll_bar].start;
+	dw->ll_region.paddr += vsec_data.ll_off;
+	dw->ll_region.sz = vsec_data.ll_sz;
+
+	dw->dt_region.vaddr = pcim_iomap_table(pdev)[vsec_data.dt_bar];
+	dw->dt_region.vaddr += vsec_data.dt_off;
+	dw->dt_region.paddr = pdev->resource[vsec_data.dt_bar].start;
+	dw->dt_region.paddr += vsec_data.dt_off;
+	dw->dt_region.sz = vsec_data.dt_sz;
+
+	dw->mf = vsec_data.mf;
 	dw->nr_irqs = nr_irqs;
 	dw->ops = &dw_edma_pcie_core_ops;
+	dw->rd_ch_cnt = vsec_data.rd_ch_cnt;
+	dw->wr_ch_cnt = vsec_data.wr_ch_cnt;
 
 	/* Debug info */
 	if (dw->mf == EDMA_MF_EDMA_LEGACY)
@@ -170,15 +232,15 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 		pci_dbg(pdev, "Version:\tUnknown (0x%x)\n", dw->mf);
 
 	pci_dbg(pdev, "Registers:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
-		pdata->rg_bar, pdata->rg_off, pdata->rg_sz,
+		vsec_data.rg_bar, vsec_data.rg_off, vsec_data.rg_sz,
 		dw->rg_region.vaddr, &dw->rg_region.paddr);
 
 	pci_dbg(pdev, "L. List:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
-		pdata->ll_bar, pdata->ll_off, pdata->ll_sz,
+		vsec_data.ll_bar, vsec_data.ll_off, vsec_data.ll_sz,
 		dw->ll_region.vaddr, &dw->ll_region.paddr);
 
 	pci_dbg(pdev, "Data:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
-		pdata->dt_bar, pdata->dt_off, pdata->dt_sz,
+		vsec_data.dt_bar, vsec_data.dt_off, vsec_data.dt_sz,
 		dw->dt_region.vaddr, &dw->dt_region.paddr);
 
 	pci_dbg(pdev, "Nr. IRQs:\t%u\n", dw->nr_irqs);
-- 
cgit v1.2.3


From 85e7518f42c85d339fac0af9f9d025d7e6717f2d Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 18 Feb 2021 20:04:00 +0100
Subject: dmaengine: dw-edma: Add device_prep_interleave_dma() support

Add device_prep_interleave_dma() support to Synopsys DMA driver.

This feature implements a similar data transfer mechanism to the
scatter-gather implementation.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/73dc36264910654e266ae25814d892a0476e4427.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dw-edma/dw-edma-core.c | 85 ++++++++++++++++++++++++++++++--------
 drivers/dma/dw-edma/dw-edma-core.h | 13 ++++--
 2 files changed, 78 insertions(+), 20 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index 18a2878d2c50..1227a3ed45aa 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -329,7 +329,7 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
 	struct dw_edma_chunk *chunk;
 	struct dw_edma_burst *burst;
 	struct dw_edma_desc *desc;
-	u32 cnt;
+	u32 cnt = 0;
 	int i;
 
 	if (!chan->configured)
@@ -352,12 +352,19 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
 		return NULL;
 	}
 
-	if (xfer->cyclic) {
+	if (xfer->type == EDMA_XFER_CYCLIC) {
 		if (!xfer->xfer.cyclic.len || !xfer->xfer.cyclic.cnt)
 			return NULL;
-	} else {
+	} else if (xfer->type == EDMA_XFER_SCATTER_GATHER) {
 		if (xfer->xfer.sg.len < 1)
 			return NULL;
+	} else if (xfer->type == EDMA_XFER_INTERLEAVED) {
+		if (!xfer->xfer.il->numf)
+			return NULL;
+		if (xfer->xfer.il->numf > 0 && xfer->xfer.il->frame_size > 0)
+			return NULL;
+	} else {
+		return NULL;
 	}
 
 	desc = dw_edma_alloc_desc(chan);
@@ -368,18 +375,28 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
 	if (unlikely(!chunk))
 		goto err_alloc;
 
-	src_addr = chan->config.src_addr;
-	dst_addr = chan->config.dst_addr;
+	if (xfer->type == EDMA_XFER_INTERLEAVED) {
+		src_addr = xfer->xfer.il->src_start;
+		dst_addr = xfer->xfer.il->dst_start;
+	} else {
+		src_addr = chan->config.src_addr;
+		dst_addr = chan->config.dst_addr;
+	}
 
-	if (xfer->cyclic) {
+	if (xfer->type == EDMA_XFER_CYCLIC) {
 		cnt = xfer->xfer.cyclic.cnt;
-	} else {
+	} else if (xfer->type == EDMA_XFER_SCATTER_GATHER) {
 		cnt = xfer->xfer.sg.len;
 		sg = xfer->xfer.sg.sgl;
+	} else if (xfer->type == EDMA_XFER_INTERLEAVED) {
+		if (xfer->xfer.il->numf > 0)
+			cnt = xfer->xfer.il->numf;
+		else
+			cnt = xfer->xfer.il->frame_size;
 	}
 
 	for (i = 0; i < cnt; i++) {
-		if (!xfer->cyclic && !sg)
+		if (xfer->type == EDMA_XFER_SCATTER_GATHER && !sg)
 			break;
 
 		if (chunk->bursts_alloc == chan->ll_max) {
@@ -392,19 +409,21 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
 		if (unlikely(!burst))
 			goto err_alloc;
 
-		if (xfer->cyclic)
+		if (xfer->type == EDMA_XFER_CYCLIC)
 			burst->sz = xfer->xfer.cyclic.len;
-		else
+		else if (xfer->type == EDMA_XFER_SCATTER_GATHER)
 			burst->sz = sg_dma_len(sg);
+		else if (xfer->type == EDMA_XFER_INTERLEAVED)
+			burst->sz = xfer->xfer.il->sgl[i].size;
 
 		chunk->ll_region.sz += burst->sz;
 		desc->alloc_sz += burst->sz;
 
 		if (chan->dir == EDMA_DIR_WRITE) {
 			burst->sar = src_addr;
-			if (xfer->cyclic) {
+			if (xfer->type == EDMA_XFER_CYCLIC) {
 				burst->dar = xfer->xfer.cyclic.paddr;
-			} else {
+			} else if (xfer->type == EDMA_XFER_SCATTER_GATHER) {
 				burst->dar = dst_addr;
 				/* Unlike the typical assumption by other
 				 * drivers/IPs the peripheral memory isn't
@@ -416,9 +435,9 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
 			}
 		} else {
 			burst->dar = dst_addr;
-			if (xfer->cyclic) {
+			if (xfer->type == EDMA_XFER_CYCLIC) {
 				burst->sar = xfer->xfer.cyclic.paddr;
-			} else {
+			} else if (xfer->type == EDMA_XFER_SCATTER_GATHER) {
 				burst->sar = src_addr;
 				/* Unlike the typical assumption by other
 				 * drivers/IPs the peripheral memory isn't
@@ -430,10 +449,24 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
 			}
 		}
 
-		if (!xfer->cyclic) {
+		if (xfer->type == EDMA_XFER_SCATTER_GATHER) {
 			src_addr += sg_dma_len(sg);
 			dst_addr += sg_dma_len(sg);
 			sg = sg_next(sg);
+		} else if (xfer->type == EDMA_XFER_INTERLEAVED &&
+			   xfer->xfer.il->frame_size > 0) {
+			struct dma_interleaved_template *il = xfer->xfer.il;
+			struct data_chunk *dc = &il->sgl[i];
+
+			if (il->src_sgl) {
+				src_addr += burst->sz;
+				src_addr += dmaengine_get_src_icg(il, dc);
+			}
+
+			if (il->dst_sgl) {
+				dst_addr += burst->sz;
+				dst_addr += dmaengine_get_dst_icg(il, dc);
+			}
 		}
 	}
 
@@ -459,7 +492,7 @@ dw_edma_device_prep_slave_sg(struct dma_chan *dchan, struct scatterlist *sgl,
 	xfer.xfer.sg.sgl = sgl;
 	xfer.xfer.sg.len = len;
 	xfer.flags = flags;
-	xfer.cyclic = false;
+	xfer.type = EDMA_XFER_SCATTER_GATHER;
 
 	return dw_edma_device_transfer(&xfer);
 }
@@ -478,7 +511,23 @@ dw_edma_device_prep_dma_cyclic(struct dma_chan *dchan, dma_addr_t paddr,
 	xfer.xfer.cyclic.len = len;
 	xfer.xfer.cyclic.cnt = count;
 	xfer.flags = flags;
-	xfer.cyclic = true;
+	xfer.type = EDMA_XFER_CYCLIC;
+
+	return dw_edma_device_transfer(&xfer);
+}
+
+static struct dma_async_tx_descriptor *
+dw_edma_device_prep_interleaved_dma(struct dma_chan *dchan,
+				    struct dma_interleaved_template *ilt,
+				    unsigned long flags)
+{
+	struct dw_edma_transfer xfer;
+
+	xfer.dchan = dchan;
+	xfer.direction = ilt->dir;
+	xfer.xfer.il = ilt;
+	xfer.flags = flags;
+	xfer.type = EDMA_XFER_INTERLEAVED;
 
 	return dw_edma_device_transfer(&xfer);
 }
@@ -738,6 +787,7 @@ static int dw_edma_channel_setup(struct dw_edma_chip *chip, bool write,
 	dma_cap_set(DMA_SLAVE, dma->cap_mask);
 	dma_cap_set(DMA_CYCLIC, dma->cap_mask);
 	dma_cap_set(DMA_PRIVATE, dma->cap_mask);
+	dma_cap_set(DMA_INTERLEAVE, dma->cap_mask);
 	dma->directions = BIT(write ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV);
 	dma->src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
 	dma->dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
@@ -756,6 +806,7 @@ static int dw_edma_channel_setup(struct dw_edma_chip *chip, bool write,
 	dma->device_tx_status = dw_edma_device_tx_status;
 	dma->device_prep_slave_sg = dw_edma_device_prep_slave_sg;
 	dma->device_prep_dma_cyclic = dw_edma_device_prep_dma_cyclic;
+	dma->device_prep_interleaved_dma = dw_edma_device_prep_interleaved_dma;
 
 	dma_set_max_seg_size(dma->dev, U32_MAX);
 
diff --git a/drivers/dma/dw-edma/dw-edma-core.h b/drivers/dma/dw-edma/dw-edma-core.h
index 3f9593ede881..f72ebaa118af 100644
--- a/drivers/dma/dw-edma/dw-edma-core.h
+++ b/drivers/dma/dw-edma/dw-edma-core.h
@@ -39,6 +39,12 @@ enum dw_edma_status {
 	EDMA_ST_BUSY
 };
 
+enum dw_edma_xfer_type {
+	EDMA_XFER_SCATTER_GATHER = 0,
+	EDMA_XFER_CYCLIC,
+	EDMA_XFER_INTERLEAVED
+};
+
 struct dw_edma_chan;
 struct dw_edma_chunk;
 
@@ -146,12 +152,13 @@ struct dw_edma_cyclic {
 struct dw_edma_transfer {
 	struct dma_chan			*dchan;
 	union dw_edma_xfer {
-		struct dw_edma_sg	sg;
-		struct dw_edma_cyclic	cyclic;
+		struct dw_edma_sg		sg;
+		struct dw_edma_cyclic		cyclic;
+		struct dma_interleaved_template *il;
 	} xfer;
 	enum dma_transfer_direction	direction;
 	unsigned long			flags;
-	bool				cyclic;
+	enum dw_edma_xfer_type		type;
 };
 
 static inline
-- 
cgit v1.2.3


From 16b90dd94d3f88b9f43cc06228d2b64d32225e5d Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 18 Feb 2021 20:04:01 +0100
Subject: dmaengine: dw-edma: Improve number of channels check

It was added some extra checks to ensure that the driver doesn't try to
use more DMA channels than actually are available in hardware.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/cfb2b0a4f97ae9dc83ebe5ea59d6a51d69ea3654.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dw-edma/dw-edma-core.c | 21 +++++++++------------
 drivers/dma/dw-edma/dw-edma-core.h |  2 ++
 2 files changed, 11 insertions(+), 12 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index 1227a3ed45aa..cc391070c1bf 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -914,19 +914,16 @@ int dw_edma_probe(struct dw_edma_chip *chip)
 
 	raw_spin_lock_init(&dw->lock);
 
-	if (!dw->wr_ch_cnt) {
-		/* Find out how many write channels are supported by hardware */
-		dw->wr_ch_cnt = dw_edma_v0_core_ch_count(dw, EDMA_DIR_WRITE);
-		if (!dw->wr_ch_cnt)
-			return -EINVAL;
-	}
+	dw->wr_ch_cnt = min_t(u16, dw->wr_ch_cnt,
+			      dw_edma_v0_core_ch_count(dw, EDMA_DIR_WRITE));
+	dw->wr_ch_cnt = min_t(u16, dw->wr_ch_cnt, EDMA_MAX_WR_CH);
 
-	if (!dw->rd_ch_cnt) {
-		/* Find out how many read channels are supported by hardware */
-		dw->rd_ch_cnt = dw_edma_v0_core_ch_count(dw, EDMA_DIR_READ);
-		if (!dw->rd_ch_cnt)
-			return -EINVAL;
-	}
+	dw->rd_ch_cnt = min_t(u16, dw->rd_ch_cnt,
+			      dw_edma_v0_core_ch_count(dw, EDMA_DIR_READ));
+	dw->rd_ch_cnt = min_t(u16, dw->rd_ch_cnt, EDMA_MAX_RD_CH);
+
+	if (!dw->wr_ch_cnt && !dw->rd_ch_cnt)
+		return -EINVAL;
 
 	dev_vdbg(dev, "Channels:\twrite=%d, read=%d\n",
 		 dw->wr_ch_cnt, dw->rd_ch_cnt);
diff --git a/drivers/dma/dw-edma/dw-edma-core.h b/drivers/dma/dw-edma/dw-edma-core.h
index f72ebaa118af..650b1c7d30b7 100644
--- a/drivers/dma/dw-edma/dw-edma-core.h
+++ b/drivers/dma/dw-edma/dw-edma-core.h
@@ -15,6 +15,8 @@
 #include "../virt-dma.h"
 
 #define EDMA_LL_SZ					24
+#define EDMA_MAX_WR_CH					8
+#define EDMA_MAX_RD_CH					8
 
 enum dw_edma_dir {
 	EDMA_DIR_WRITE = 0,
-- 
cgit v1.2.3


From f3167dc16378da4abd4ca19d6700170fcdfd5be7 Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 18 Feb 2021 20:04:02 +0100
Subject: dmaengine: dw-edma: Reorder variables to keep consistency

In the driver code structure, I tried to keep the code style consistency
by writing the write channels instructions first, and then follow by the
read channels instructions, mimicking the hardware implementation.

However, this code style failed in some cases. This patch fixes that and
no functional changes are expected.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/9bd1f86f19df8bb5de502fb85a0c5dc07978a9ba.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dw-edma/dw-edma-pcie.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c
index eb6f8b399cc7..63c62e16e20a 100644
--- a/drivers/dma/dw-edma/dw-edma-pcie.c
+++ b/drivers/dma/dw-edma/dw-edma-pcie.c
@@ -20,8 +20,8 @@
 #define DW_PCIE_VSEC_DMA_ID			0x6
 #define DW_PCIE_VSEC_DMA_BAR			GENMASK(10, 8)
 #define DW_PCIE_VSEC_DMA_MAP			GENMASK(2, 0)
-#define DW_PCIE_VSEC_DMA_RD_CH			GENMASK(25, 16)
 #define DW_PCIE_VSEC_DMA_WR_CH			GENMASK(9, 0)
+#define DW_PCIE_VSEC_DMA_RD_CH			GENMASK(25, 16)
 
 struct dw_edma_pcie_data {
 	/* eDMA registers location */
@@ -39,8 +39,8 @@ struct dw_edma_pcie_data {
 	/* Other */
 	enum dw_edma_map_format		mf;
 	u8				irqs;
-	u16				rd_ch_cnt;
 	u16				wr_ch_cnt;
+	u16				rd_ch_cnt;
 };
 
 static const struct dw_edma_pcie_data snps_edda_data = {
@@ -59,8 +59,8 @@ static const struct dw_edma_pcie_data snps_edda_data = {
 	/* Other */
 	.mf				= EDMA_MF_EDMA_UNROLL,
 	.irqs				= 1,
-	.rd_ch_cnt			= 0,
 	.wr_ch_cnt			= 0,
+	.rd_ch_cnt			= 0,
 };
 
 static int dw_edma_pcie_irq_vector(struct device *dev, unsigned int nr)
@@ -101,8 +101,8 @@ static void dw_edma_pcie_get_vsec_dma_data(struct pci_dev *pdev,
 	pdata->rg_bar = FIELD_GET(DW_PCIE_VSEC_DMA_BAR, val);
 
 	pci_read_config_dword(pdev, vsec + 0xc, &val);
-	pdata->rd_ch_cnt = FIELD_GET(DW_PCIE_VSEC_DMA_RD_CH, val);
 	pdata->wr_ch_cnt = FIELD_GET(DW_PCIE_VSEC_DMA_WR_CH, val);
+	pdata->rd_ch_cnt = FIELD_GET(DW_PCIE_VSEC_DMA_RD_CH, val);
 
 	pci_read_config_dword(pdev, vsec + 0x14, &val);
 	off = val;
@@ -218,8 +218,8 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	dw->mf = vsec_data.mf;
 	dw->nr_irqs = nr_irqs;
 	dw->ops = &dw_edma_pcie_core_ops;
-	dw->rd_ch_cnt = vsec_data.rd_ch_cnt;
 	dw->wr_ch_cnt = vsec_data.wr_ch_cnt;
+	dw->rd_ch_cnt = vsec_data.rd_ch_cnt;
 
 	/* Debug info */
 	if (dw->mf == EDMA_MF_EDMA_LEGACY)
-- 
cgit v1.2.3


From 31fb8c1ff962d93ed5025f39a6a186207c9805eb Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 18 Feb 2021 20:04:03 +0100
Subject: dmaengine: dw-edma: Improve the linked list and data blocks
 definition

In the previous implementation, the driver assumed that there existed
only two memory spaces that would equally distribute the amount of
read/write channels.

This might not be the case on some other implementations, therefore this
patch change this requirement so that each write/read channel has
its own linked list and data space well defined, which allows
different sizes and locations.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/2e316cb983f8a1e09ce929029f87619dc92a52de.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dw-edma/dw-edma-core.c |  51 +++++-----
 drivers/dma/dw-edma/dw-edma-core.h |   9 +-
 drivers/dma/dw-edma/dw-edma-pcie.c | 185 ++++++++++++++++++++++++++-----------
 3 files changed, 160 insertions(+), 85 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index cc391070c1bf..552b5f998dbf 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -81,8 +81,13 @@ static struct dw_edma_chunk *dw_edma_alloc_chunk(struct dw_edma_desc *desc)
 	 *  - Even chunks originate CB equal to 1
 	 */
 	chunk->cb = !(desc->chunks_alloc % 2);
-	chunk->ll_region.paddr = dw->ll_region.paddr + chan->ll_off;
-	chunk->ll_region.vaddr = dw->ll_region.vaddr + chan->ll_off;
+	if (chan->dir == EDMA_DIR_WRITE) {
+		chunk->ll_region.paddr = dw->ll_region_wr[chan->id].paddr;
+		chunk->ll_region.vaddr = dw->ll_region_wr[chan->id].vaddr;
+	} else {
+		chunk->ll_region.paddr = dw->ll_region_rd[chan->id].paddr;
+		chunk->ll_region.vaddr = dw->ll_region_rd[chan->id].vaddr;
+	}
 
 	if (desc->chunk) {
 		/* Create and add new element into the linked list */
@@ -691,24 +696,13 @@ static int dw_edma_channel_setup(struct dw_edma_chip *chip, bool write,
 	struct device *dev = chip->dev;
 	struct dw_edma *dw = chip->dw;
 	struct dw_edma_chan *chan;
-	size_t ll_chunk, dt_chunk;
 	struct dw_edma_irq *irq;
 	struct dma_device *dma;
-	u32 i, j, cnt, ch_cnt;
 	u32 alloc, off_alloc;
+	u32 i, j, cnt;
 	int err = 0;
 	u32 pos;
 
-	ch_cnt = dw->wr_ch_cnt + dw->rd_ch_cnt;
-	ll_chunk = dw->ll_region.sz;
-	dt_chunk = dw->dt_region.sz;
-
-	/* Calculate linked list chunk for each channel */
-	ll_chunk /= roundup_pow_of_two(ch_cnt);
-
-	/* Calculate linked list chunk for each channel */
-	dt_chunk /= roundup_pow_of_two(ch_cnt);
-
 	if (write) {
 		i = 0;
 		cnt = dw->wr_ch_cnt;
@@ -740,14 +734,14 @@ static int dw_edma_channel_setup(struct dw_edma_chip *chip, bool write,
 		chan->request = EDMA_REQ_NONE;
 		chan->status = EDMA_ST_IDLE;
 
-		chan->ll_off = (ll_chunk * i);
-		chan->ll_max = (ll_chunk / EDMA_LL_SZ) - 1;
-
-		chan->dt_off = (dt_chunk * i);
+		if (write)
+			chan->ll_max = (dw->ll_region_wr[j].sz / EDMA_LL_SZ);
+		else
+			chan->ll_max = (dw->ll_region_rd[j].sz / EDMA_LL_SZ);
+		chan->ll_max -= 1;
 
-		dev_vdbg(dev, "L. List:\tChannel %s[%u] off=0x%.8lx, max_cnt=%u\n",
-			 write ? "write" : "read", j,
-			 chan->ll_off, chan->ll_max);
+		dev_vdbg(dev, "L. List:\tChannel %s[%u] max_cnt=%u\n",
+			 write ? "write" : "read", j, chan->ll_max);
 
 		if (dw->nr_irqs == 1)
 			pos = 0;
@@ -772,12 +766,15 @@ static int dw_edma_channel_setup(struct dw_edma_chip *chip, bool write,
 		chan->vc.desc_free = vchan_free_desc;
 		vchan_init(&chan->vc, dma);
 
-		dt_region->paddr = dw->dt_region.paddr + chan->dt_off;
-		dt_region->vaddr = dw->dt_region.vaddr + chan->dt_off;
-		dt_region->sz = dt_chunk;
-
-		dev_vdbg(dev, "Data:\tChannel %s[%u] off=0x%.8lx\n",
-			 write ? "write" : "read", j, chan->dt_off);
+		if (write) {
+			dt_region->paddr = dw->dt_region_wr[j].paddr;
+			dt_region->vaddr = dw->dt_region_wr[j].vaddr;
+			dt_region->sz = dw->dt_region_wr[j].sz;
+		} else {
+			dt_region->paddr = dw->dt_region_rd[j].paddr;
+			dt_region->vaddr = dw->dt_region_rd[j].vaddr;
+			dt_region->sz = dw->dt_region_rd[j].sz;
+		}
 
 		dw_edma_v0_core_device_config(chan);
 	}
diff --git a/drivers/dma/dw-edma/dw-edma-core.h b/drivers/dma/dw-edma/dw-edma-core.h
index 650b1c7d30b7..cba543655e33 100644
--- a/drivers/dma/dw-edma/dw-edma-core.h
+++ b/drivers/dma/dw-edma/dw-edma-core.h
@@ -91,11 +91,8 @@ struct dw_edma_chan {
 	int				id;
 	enum dw_edma_dir		dir;
 
-	off_t				ll_off;
 	u32				ll_max;
 
-	off_t				dt_off;
-
 	struct msi_msg			msi;
 
 	enum dw_edma_request		request;
@@ -126,8 +123,10 @@ struct dw_edma {
 	u16				rd_ch_cnt;
 
 	struct dw_edma_region		rg_region;	/* Registers */
-	struct dw_edma_region		ll_region;	/* Linked list */
-	struct dw_edma_region		dt_region;	/* Data */
+	struct dw_edma_region		ll_region_wr[EDMA_MAX_WR_CH];
+	struct dw_edma_region		ll_region_rd[EDMA_MAX_RD_CH];
+	struct dw_edma_region		dt_region_wr[EDMA_MAX_WR_CH];
+	struct dw_edma_region		dt_region_rd[EDMA_MAX_RD_CH];
 
 	struct dw_edma_irq		*irq;
 	int				nr_irqs;
diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c
index 63c62e16e20a..1055fdbba390 100644
--- a/drivers/dma/dw-edma/dw-edma-pcie.c
+++ b/drivers/dma/dw-edma/dw-edma-pcie.c
@@ -23,19 +23,28 @@
 #define DW_PCIE_VSEC_DMA_WR_CH			GENMASK(9, 0)
 #define DW_PCIE_VSEC_DMA_RD_CH			GENMASK(25, 16)
 
+#define DW_BLOCK(a, b, c) \
+	{ \
+		.bar = a, \
+		.off = b, \
+		.sz = c, \
+	},
+
+struct dw_edma_block {
+	enum pci_barno			bar;
+	off_t				off;
+	size_t				sz;
+};
+
 struct dw_edma_pcie_data {
 	/* eDMA registers location */
-	enum pci_barno			rg_bar;
-	off_t				rg_off;
-	size_t				rg_sz;
+	struct dw_edma_block		rg;
 	/* eDMA memory linked list location */
-	enum pci_barno			ll_bar;
-	off_t				ll_off;
-	size_t				ll_sz;
+	struct dw_edma_block		ll_wr[EDMA_MAX_WR_CH];
+	struct dw_edma_block		ll_rd[EDMA_MAX_RD_CH];
 	/* eDMA memory data location */
-	enum pci_barno			dt_bar;
-	off_t				dt_off;
-	size_t				dt_sz;
+	struct dw_edma_block		dt_wr[EDMA_MAX_WR_CH];
+	struct dw_edma_block		dt_rd[EDMA_MAX_RD_CH];
 	/* Other */
 	enum dw_edma_map_format		mf;
 	u8				irqs;
@@ -45,22 +54,40 @@ struct dw_edma_pcie_data {
 
 static const struct dw_edma_pcie_data snps_edda_data = {
 	/* eDMA registers location */
-	.rg_bar				= BAR_0,
-	.rg_off				= 0x00001000,	/*  4 Kbytes */
-	.rg_sz				= 0x00002000,	/*  8 Kbytes */
+	.rg.bar				= BAR_0,
+	.rg.off				= 0x00001000,	/*  4 Kbytes */
+	.rg.sz				= 0x00002000,	/*  8 Kbytes */
 	/* eDMA memory linked list location */
-	.ll_bar				= BAR_2,
-	.ll_off				= 0x00000000,	/*  0 Kbytes */
-	.ll_sz				= 0x00800000,	/*  8 Mbytes */
+	.ll_wr = {
+		/* Channel 0 - BAR 2, offset 0 Mbytes, size 2 Mbytes */
+		DW_BLOCK(BAR_2, 0x00000000, 0x00200000)
+		/* Channel 1 - BAR 2, offset 2 Mbytes, size 2 Mbytes */
+		DW_BLOCK(BAR_2, 0x00200000, 0x00200000)
+	},
+	.ll_rd = {
+		/* Channel 0 - BAR 2, offset 4 Mbytes, size 2 Mbytes */
+		DW_BLOCK(BAR_2, 0x00400000, 0x00200000)
+		/* Channel 1 - BAR 2, offset 6 Mbytes, size 2 Mbytes */
+		DW_BLOCK(BAR_2, 0x00600000, 0x00200000)
+	},
 	/* eDMA memory data location */
-	.dt_bar				= BAR_2,
-	.dt_off				= 0x00800000,	/*  8 Mbytes */
-	.dt_sz				= 0x03800000,	/* 56 Mbytes */
+	.dt_wr = {
+		/* Channel 0 - BAR 2, offset 8 Mbytes, size 14 Mbytes */
+		DW_BLOCK(BAR_2, 0x00800000, 0x00e00000)
+		/* Channel 1 - BAR 2, offset 22 Mbytes, size 14 Mbytes */
+		DW_BLOCK(BAR_2, 0x01600000, 0x00e00000)
+	},
+	.dt_rd = {
+		/* Channel 0 - BAR 2, offset 36 Mbytes, size 14 Mbytes */
+		DW_BLOCK(BAR_2, 0x02400000, 0x00e00000)
+		/* Channel 1 - BAR 2, offset 50 Mbytes, size 14 Mbytes */
+		DW_BLOCK(BAR_2, 0x03200000, 0x00e00000)
+	},
 	/* Other */
 	.mf				= EDMA_MF_EDMA_UNROLL,
 	.irqs				= 1,
-	.wr_ch_cnt			= 0,
-	.rd_ch_cnt			= 0,
+	.wr_ch_cnt			= 2,
+	.rd_ch_cnt			= 2,
 };
 
 static int dw_edma_pcie_irq_vector(struct device *dev, unsigned int nr)
@@ -98,18 +125,20 @@ static void dw_edma_pcie_get_vsec_dma_data(struct pci_dev *pdev,
 		return;
 
 	pdata->mf = map;
-	pdata->rg_bar = FIELD_GET(DW_PCIE_VSEC_DMA_BAR, val);
+	pdata->rg.bar = FIELD_GET(DW_PCIE_VSEC_DMA_BAR, val);
 
 	pci_read_config_dword(pdev, vsec + 0xc, &val);
-	pdata->wr_ch_cnt = FIELD_GET(DW_PCIE_VSEC_DMA_WR_CH, val);
-	pdata->rd_ch_cnt = FIELD_GET(DW_PCIE_VSEC_DMA_RD_CH, val);
+	pdata->wr_ch_cnt = min_t(u16, pdata->wr_ch_cnt,
+				 FIELD_GET(DW_PCIE_VSEC_DMA_WR_CH, val));
+	pdata->rd_ch_cnt = min_t(u16, pdata->rd_ch_cnt,
+				 FIELD_GET(DW_PCIE_VSEC_DMA_RD_CH, val));
 
 	pci_read_config_dword(pdev, vsec + 0x14, &val);
 	off = val;
 	pci_read_config_dword(pdev, vsec + 0x10, &val);
 	off <<= 32;
 	off |= val;
-	pdata->rg_off = off;
+	pdata->rg.off = off;
 }
 
 static int dw_edma_pcie_probe(struct pci_dev *pdev,
@@ -121,6 +150,7 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	struct dw_edma_chip *chip;
 	struct dw_edma *dw;
 	int err, nr_irqs;
+	int i, mask;
 
 	/* Enable PCI device */
 	err = pcim_enable_device(pdev);
@@ -138,10 +168,16 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	dw_edma_pcie_get_vsec_dma_data(pdev, &vsec_data);
 
 	/* Mapping PCI BAR regions */
-	err = pcim_iomap_regions(pdev, BIT(vsec_data.rg_bar) |
-				       BIT(vsec_data.ll_bar) |
-				       BIT(vsec_data.dt_bar),
-				 pci_name(pdev));
+	mask = BIT(vsec_data.rg.bar);
+	for (i = 0; i < vsec_data.wr_ch_cnt; i++) {
+		mask |= BIT(vsec_data.ll_wr[i].bar);
+		mask |= BIT(vsec_data.dt_wr[i].bar);
+	}
+	for (i = 0; i < vsec_data.rd_ch_cnt; i++) {
+		mask |= BIT(vsec_data.ll_rd[i].bar);
+		mask |= BIT(vsec_data.dt_rd[i].bar);
+	}
+	err = pcim_iomap_regions(pdev, mask, pci_name(pdev));
 	if (err) {
 		pci_err(pdev, "eDMA BAR I/O remapping failed\n");
 		return err;
@@ -197,30 +233,56 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	chip->id = pdev->devfn;
 	chip->irq = pdev->irq;
 
-	dw->rg_region.vaddr = pcim_iomap_table(pdev)[vsec_data.rg_bar];
-	dw->rg_region.vaddr += vsec_data.rg_off;
-	dw->rg_region.paddr = pdev->resource[vsec_data.rg_bar].start;
-	dw->rg_region.paddr += vsec_data.rg_off;
-	dw->rg_region.sz = vsec_data.rg_sz;
-
-	dw->ll_region.vaddr = pcim_iomap_table(pdev)[vsec_data.ll_bar];
-	dw->ll_region.vaddr += vsec_data.ll_off;
-	dw->ll_region.paddr = pdev->resource[vsec_data.ll_bar].start;
-	dw->ll_region.paddr += vsec_data.ll_off;
-	dw->ll_region.sz = vsec_data.ll_sz;
-
-	dw->dt_region.vaddr = pcim_iomap_table(pdev)[vsec_data.dt_bar];
-	dw->dt_region.vaddr += vsec_data.dt_off;
-	dw->dt_region.paddr = pdev->resource[vsec_data.dt_bar].start;
-	dw->dt_region.paddr += vsec_data.dt_off;
-	dw->dt_region.sz = vsec_data.dt_sz;
-
 	dw->mf = vsec_data.mf;
 	dw->nr_irqs = nr_irqs;
 	dw->ops = &dw_edma_pcie_core_ops;
 	dw->wr_ch_cnt = vsec_data.wr_ch_cnt;
 	dw->rd_ch_cnt = vsec_data.rd_ch_cnt;
 
+	dw->rg_region.vaddr = pcim_iomap_table(pdev)[vsec_data.rg.bar];
+	dw->rg_region.vaddr += vsec_data.rg.off;
+	dw->rg_region.paddr = pdev->resource[vsec_data.rg.bar].start;
+	dw->rg_region.paddr += vsec_data.rg.off;
+	dw->rg_region.sz = vsec_data.rg.sz;
+
+	for (i = 0; i < dw->wr_ch_cnt; i++) {
+		struct dw_edma_region *ll_region = &dw->ll_region_wr[i];
+		struct dw_edma_region *dt_region = &dw->dt_region_wr[i];
+		struct dw_edma_block *ll_block = &vsec_data.ll_wr[i];
+		struct dw_edma_block *dt_block = &vsec_data.dt_wr[i];
+
+		ll_region->vaddr = pcim_iomap_table(pdev)[ll_block->bar];
+		ll_region->vaddr += ll_block->off;
+		ll_region->paddr = pdev->resource[ll_block->bar].start;
+		ll_region->paddr += ll_block->off;
+		ll_region->sz = ll_block->sz;
+
+		dt_region->vaddr = pcim_iomap_table(pdev)[dt_block->bar];
+		dt_region->vaddr += dt_block->off;
+		dt_region->paddr = pdev->resource[dt_block->bar].start;
+		dt_region->paddr += dt_block->off;
+		dt_region->sz = dt_block->sz;
+	}
+
+	for (i = 0; i < dw->rd_ch_cnt; i++) {
+		struct dw_edma_region *ll_region = &dw->ll_region_rd[i];
+		struct dw_edma_region *dt_region = &dw->dt_region_rd[i];
+		struct dw_edma_block *ll_block = &vsec_data.ll_rd[i];
+		struct dw_edma_block *dt_block = &vsec_data.dt_rd[i];
+
+		ll_region->vaddr = pcim_iomap_table(pdev)[ll_block->bar];
+		ll_region->vaddr += ll_block->off;
+		ll_region->paddr = pdev->resource[ll_block->bar].start;
+		ll_region->paddr += ll_block->off;
+		ll_region->sz = ll_block->sz;
+
+		dt_region->vaddr = pcim_iomap_table(pdev)[dt_block->bar];
+		dt_region->vaddr += dt_block->off;
+		dt_region->paddr = pdev->resource[dt_block->bar].start;
+		dt_region->paddr += dt_block->off;
+		dt_region->sz = dt_block->sz;
+	}
+
 	/* Debug info */
 	if (dw->mf == EDMA_MF_EDMA_LEGACY)
 		pci_dbg(pdev, "Version:\teDMA Port Logic (0x%x)\n", dw->mf);
@@ -232,16 +294,33 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 		pci_dbg(pdev, "Version:\tUnknown (0x%x)\n", dw->mf);
 
 	pci_dbg(pdev, "Registers:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
-		vsec_data.rg_bar, vsec_data.rg_off, vsec_data.rg_sz,
+		vsec_data.rg.bar, vsec_data.rg.off, vsec_data.rg.sz,
 		dw->rg_region.vaddr, &dw->rg_region.paddr);
 
-	pci_dbg(pdev, "L. List:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
-		vsec_data.ll_bar, vsec_data.ll_off, vsec_data.ll_sz,
-		dw->ll_region.vaddr, &dw->ll_region.paddr);
 
-	pci_dbg(pdev, "Data:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
-		vsec_data.dt_bar, vsec_data.dt_off, vsec_data.dt_sz,
-		dw->dt_region.vaddr, &dw->dt_region.paddr);
+	for (i = 0; i < dw->wr_ch_cnt; i++) {
+		pci_dbg(pdev, "L. List:\tWRITE CH%.2u, BAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
+			i, vsec_data.ll_wr[i].bar,
+			vsec_data.ll_wr[i].off, dw->ll_region_wr[i].sz,
+			dw->ll_region_wr[i].vaddr, &dw->ll_region_wr[i].paddr);
+
+		pci_dbg(pdev, "Data:\tWRITE CH%.2u, BAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
+			i, vsec_data.dt_wr[i].bar,
+			vsec_data.dt_wr[i].off, dw->dt_region_wr[i].sz,
+			dw->dt_region_wr[i].vaddr, &dw->dt_region_wr[i].paddr);
+	}
+
+	for (i = 0; i < dw->rd_ch_cnt; i++) {
+		pci_dbg(pdev, "L. List:\tREAD CH%.2u, BAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
+			i, vsec_data.ll_rd[i].bar,
+			vsec_data.ll_rd[i].off, dw->ll_region_rd[i].sz,
+			dw->ll_region_rd[i].vaddr, &dw->ll_region_rd[i].paddr);
+
+		pci_dbg(pdev, "Data:\tREAD CH%.2u, BAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
+			i, vsec_data.dt_rd[i].bar,
+			vsec_data.dt_rd[i].off, dw->dt_region_rd[i].sz,
+			dw->dt_region_rd[i].vaddr, &dw->dt_region_rd[i].paddr);
+	}
 
 	pci_dbg(pdev, "Nr. IRQs:\t%u\n", dw->nr_irqs);
 
-- 
cgit v1.2.3


From da6e0dd54135e51ca858ee231674ba93ca4ba89f Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 18 Feb 2021 20:04:04 +0100
Subject: dmaengine: dw-edma: Change linked list and data blocks offset and
 sizes

Changes the linked list and data blocks offset and sizes to follow the
recommendation given by the hardware team for the IPK solution.

Although the previous data blocks offset and sizes are still valid and
functional, using them that might present some issues related to the IPK
solution, since this solution is based on FPGA and might be subjected to
timmings constrains.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/f682e7f7f06dc6b2efdd431481d6fb4d762c2c05.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dw-edma/dw-edma-pcie.c | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c
index 1055fdbba390..fa66e0380e6d 100644
--- a/drivers/dma/dw-edma/dw-edma-pcie.c
+++ b/drivers/dma/dw-edma/dw-edma-pcie.c
@@ -59,29 +59,29 @@ static const struct dw_edma_pcie_data snps_edda_data = {
 	.rg.sz				= 0x00002000,	/*  8 Kbytes */
 	/* eDMA memory linked list location */
 	.ll_wr = {
-		/* Channel 0 - BAR 2, offset 0 Mbytes, size 2 Mbytes */
-		DW_BLOCK(BAR_2, 0x00000000, 0x00200000)
-		/* Channel 1 - BAR 2, offset 2 Mbytes, size 2 Mbytes */
-		DW_BLOCK(BAR_2, 0x00200000, 0x00200000)
+		/* Channel 0 - BAR 2, offset 0 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00000000, 0x00000800)
+		/* Channel 1 - BAR 2, offset 2 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00200000, 0x00000800)
 	},
 	.ll_rd = {
-		/* Channel 0 - BAR 2, offset 4 Mbytes, size 2 Mbytes */
-		DW_BLOCK(BAR_2, 0x00400000, 0x00200000)
-		/* Channel 1 - BAR 2, offset 6 Mbytes, size 2 Mbytes */
-		DW_BLOCK(BAR_2, 0x00600000, 0x00200000)
+		/* Channel 0 - BAR 2, offset 4 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00400000, 0x00000800)
+		/* Channel 1 - BAR 2, offset 6 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00600000, 0x00000800)
 	},
 	/* eDMA memory data location */
 	.dt_wr = {
-		/* Channel 0 - BAR 2, offset 8 Mbytes, size 14 Mbytes */
-		DW_BLOCK(BAR_2, 0x00800000, 0x00e00000)
-		/* Channel 1 - BAR 2, offset 22 Mbytes, size 14 Mbytes */
-		DW_BLOCK(BAR_2, 0x01600000, 0x00e00000)
+		/* Channel 0 - BAR 2, offset 8 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00800000, 0x00000800)
+		/* Channel 1 - BAR 2, offset 9 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00900000, 0x00000800)
 	},
 	.dt_rd = {
-		/* Channel 0 - BAR 2, offset 36 Mbytes, size 14 Mbytes */
-		DW_BLOCK(BAR_2, 0x02400000, 0x00e00000)
-		/* Channel 1 - BAR 2, offset 50 Mbytes, size 14 Mbytes */
-		DW_BLOCK(BAR_2, 0x03200000, 0x00e00000)
+		/* Channel 0 - BAR 2, offset 10 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00a00000, 0x00000800)
+		/* Channel 1 - BAR 2, offset 11 Mbytes, size 2 Kbytes */
+		DW_BLOCK(BAR_2, 0x00b00000, 0x00000800)
 	},
 	/* Other */
 	.mf				= EDMA_MF_EDMA_UNROLL,
-- 
cgit v1.2.3


From 5244ac2e2e34d1f558ae690f10882ebe42365ea2 Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 18 Feb 2021 20:04:05 +0100
Subject: dmaengine: dw-edma: Move struct dentry variable from static
 definition into dw_edma struct

Move struct dentry variable from static definition (dw-edma-v0-debugfs.c)
into dw_edma struct (dw-edma-core.h)

Also the variable was renamed from base_dir to debugfs.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/07c1167b671e7b175700e2e7061cf0b3dd8c6adb.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dw-edma/dw-edma-core.c       |  2 +-
 drivers/dma/dw-edma/dw-edma-core.h       |  3 +++
 drivers/dma/dw-edma/dw-edma-v0-core.c    |  4 ++--
 drivers/dma/dw-edma/dw-edma-v0-core.h    |  2 +-
 drivers/dma/dw-edma/dw-edma-v0-debugfs.c | 22 +++++++++++++---------
 drivers/dma/dw-edma/dw-edma-v0-debugfs.h |  4 ++--
 6 files changed, 22 insertions(+), 15 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index 552b5f998dbf..bc94c8dfd9fd 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -1003,7 +1003,7 @@ int dw_edma_remove(struct dw_edma_chip *chip)
 	dma_async_device_unregister(&dw->rd_edma);
 
 	/* Turn debugfs off */
-	dw_edma_v0_core_debugfs_off();
+	dw_edma_v0_core_debugfs_off(chip);
 
 	return 0;
 }
diff --git a/drivers/dma/dw-edma/dw-edma-core.h b/drivers/dma/dw-edma/dw-edma-core.h
index cba543655e33..60316d408c3e 100644
--- a/drivers/dma/dw-edma/dw-edma-core.h
+++ b/drivers/dma/dw-edma/dw-edma-core.h
@@ -137,6 +137,9 @@ struct dw_edma {
 	const struct dw_edma_core_ops	*ops;
 
 	raw_spinlock_t			lock;		/* Only for legacy */
+#ifdef CONFIG_DEBUG_FS
+	struct dentry			*debugfs;
+#endif /* CONFIG_DEBUG_FS */
 };
 
 struct dw_edma_sg {
diff --git a/drivers/dma/dw-edma/dw-edma-v0-core.c b/drivers/dma/dw-edma/dw-edma-v0-core.c
index 5b0541a3a094..329fc2e57b70 100644
--- a/drivers/dma/dw-edma/dw-edma-v0-core.c
+++ b/drivers/dma/dw-edma/dw-edma-v0-core.c
@@ -506,7 +506,7 @@ void dw_edma_v0_core_debugfs_on(struct dw_edma_chip *chip)
 	dw_edma_v0_debugfs_on(chip);
 }
 
-void dw_edma_v0_core_debugfs_off(void)
+void dw_edma_v0_core_debugfs_off(struct dw_edma_chip *chip)
 {
-	dw_edma_v0_debugfs_off();
+	dw_edma_v0_debugfs_off(chip);
 }
diff --git a/drivers/dma/dw-edma/dw-edma-v0-core.h b/drivers/dma/dw-edma/dw-edma-v0-core.h
index abae1527f1f9..2afa626b8300 100644
--- a/drivers/dma/dw-edma/dw-edma-v0-core.h
+++ b/drivers/dma/dw-edma/dw-edma-v0-core.h
@@ -23,6 +23,6 @@ void dw_edma_v0_core_start(struct dw_edma_chunk *chunk, bool first);
 int dw_edma_v0_core_device_config(struct dw_edma_chan *chan);
 /* eDMA debug fs callbacks */
 void dw_edma_v0_core_debugfs_on(struct dw_edma_chip *chip);
-void dw_edma_v0_core_debugfs_off(void);
+void dw_edma_v0_core_debugfs_off(struct dw_edma_chip *chip);
 
 #endif /* _DW_EDMA_V0_CORE_H */
diff --git a/drivers/dma/dw-edma/dw-edma-v0-debugfs.c b/drivers/dma/dw-edma/dw-edma-v0-debugfs.c
index 157dfc2e2430..4b3bcffd15ef 100644
--- a/drivers/dma/dw-edma/dw-edma-v0-debugfs.c
+++ b/drivers/dma/dw-edma/dw-edma-v0-debugfs.c
@@ -38,7 +38,6 @@
 #define CHANNEL_STR				"channel"
 #define REGISTERS_STR				"registers"
 
-static struct dentry				*base_dir;
 static struct dw_edma				*dw;
 static struct dw_edma_v0_regs			__iomem *regs;
 
@@ -272,7 +271,7 @@ static void dw_edma_debugfs_regs(void)
 	struct dentry *regs_dir;
 	int nr_entries;
 
-	regs_dir = debugfs_create_dir(REGISTERS_STR, base_dir);
+	regs_dir = debugfs_create_dir(REGISTERS_STR, dw->debugfs);
 	if (!regs_dir)
 		return;
 
@@ -293,18 +292,23 @@ void dw_edma_v0_debugfs_on(struct dw_edma_chip *chip)
 	if (!regs)
 		return;
 
-	base_dir = debugfs_create_dir(dw->name, NULL);
-	if (!base_dir)
+	dw->debugfs = debugfs_create_dir(dw->name, NULL);
+	if (!dw->debugfs)
 		return;
 
-	debugfs_create_u32("mf", 0444, base_dir, &dw->mf);
-	debugfs_create_u16("wr_ch_cnt", 0444, base_dir, &dw->wr_ch_cnt);
-	debugfs_create_u16("rd_ch_cnt", 0444, base_dir, &dw->rd_ch_cnt);
+	debugfs_create_u32("mf", 0444, dw->debugfs, &dw->mf);
+	debugfs_create_u16("wr_ch_cnt", 0444, dw->debugfs, &dw->wr_ch_cnt);
+	debugfs_create_u16("rd_ch_cnt", 0444, dw->debugfs, &dw->rd_ch_cnt);
 
 	dw_edma_debugfs_regs();
 }
 
-void dw_edma_v0_debugfs_off(void)
+void dw_edma_v0_debugfs_off(struct dw_edma_chip *chip)
 {
-	debugfs_remove_recursive(base_dir);
+	dw = chip->dw;
+	if (!dw)
+		return;
+
+	debugfs_remove_recursive(dw->debugfs);
+	dw->debugfs = NULL;
 }
diff --git a/drivers/dma/dw-edma/dw-edma-v0-debugfs.h b/drivers/dma/dw-edma/dw-edma-v0-debugfs.h
index 5450a0a94193..d0ff25a9ea5c 100644
--- a/drivers/dma/dw-edma/dw-edma-v0-debugfs.h
+++ b/drivers/dma/dw-edma/dw-edma-v0-debugfs.h
@@ -13,13 +13,13 @@
 
 #ifdef CONFIG_DEBUG_FS
 void dw_edma_v0_debugfs_on(struct dw_edma_chip *chip);
-void dw_edma_v0_debugfs_off(void);
+void dw_edma_v0_debugfs_off(struct dw_edma_chip *chip);
 #else
 static inline void dw_edma_v0_debugfs_on(struct dw_edma_chip *chip)
 {
 }
 
-static inline void dw_edma_v0_debugfs_off(void)
+static inline void dw_edma_v0_debugfs_off(struct dw_edma_chip *chip)
 {
 }
 #endif /* CONFIG_DEBUG_FS */
-- 
cgit v1.2.3


From e970dcc4bd8e0a1376e794fc81d41d0fc98262dd Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 18 Feb 2021 20:04:06 +0100
Subject: dmaengine: dw-edma: Fix crash on loading/unloading driver

When the driver is compiled as a module and loaded if we try to unload
it, the Kernel shows a crash log. This Kernel crash is due to the
dma_async_device_unregister() call done after deleting the channels,
this patch fixes this issue.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/4aa850c035cf7ee488f1d3fb6dee0e37be0dce0a.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dw-edma/dw-edma-core.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index bc94c8dfd9fd..a26d0d578a27 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -986,22 +986,21 @@ int dw_edma_remove(struct dw_edma_chip *chip)
 	/* Power management */
 	pm_runtime_disable(dev);
 
+	/* Deregister eDMA device */
+	dma_async_device_unregister(&dw->wr_edma);
 	list_for_each_entry_safe(chan, _chan, &dw->wr_edma.channels,
 				 vc.chan.device_node) {
-		list_del(&chan->vc.chan.device_node);
 		tasklet_kill(&chan->vc.task);
+		list_del(&chan->vc.chan.device_node);
 	}
 
+	dma_async_device_unregister(&dw->rd_edma);
 	list_for_each_entry_safe(chan, _chan, &dw->rd_edma.channels,
 				 vc.chan.device_node) {
-		list_del(&chan->vc.chan.device_node);
 		tasklet_kill(&chan->vc.task);
+		list_del(&chan->vc.chan.device_node);
 	}
 
-	/* Deregister eDMA device */
-	dma_async_device_unregister(&dw->wr_edma);
-	dma_async_device_unregister(&dw->rd_edma);
-
 	/* Turn debugfs off */
 	dw_edma_v0_core_debugfs_off(chip);
 
-- 
cgit v1.2.3


From cb498d7f3b086bcfab642e38aa80600dcebe0e0a Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 18 Feb 2021 20:04:07 +0100
Subject: dmaengine: dw-edma: Change DMA abbreviation from lower into upper
 case

To keep code consistent, some comments with dma keyword written in lower
case are now in upper case.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/8c4b3db90767972a2b4cbb6fa818cf0e9c3d6fe3.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dw-edma/dw-edma-core.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index a26d0d578a27..0793df12401f 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -341,15 +341,15 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
 		return NULL;
 
 	switch (chan->config.direction) {
-	case DMA_DEV_TO_MEM: /* local dma */
+	case DMA_DEV_TO_MEM: /* local DMA */
 		if (dir == DMA_DEV_TO_MEM && chan->dir == EDMA_DIR_READ)
 			break;
 		return NULL;
-	case DMA_MEM_TO_DEV: /* local dma */
+	case DMA_MEM_TO_DEV: /* local DMA */
 		if (dir == DMA_MEM_TO_DEV && chan->dir == EDMA_DIR_WRITE)
 			break;
 		return NULL;
-	default: /* remote dma */
+	default: /* remote DMA */
 		if (dir == DMA_MEM_TO_DEV && chan->dir == EDMA_DIR_READ)
 			break;
 		if (dir == DMA_DEV_TO_MEM && chan->dir == EDMA_DIR_WRITE)
-- 
cgit v1.2.3


From b671d098a97f59d6056b34e0a759ec976325c216 Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 18 Feb 2021 20:04:08 +0100
Subject: dmaengine: dw-edma: Revert fix scatter-gather address calculation

Reverting the applied patch because it caused a regression on
ARC700 platform (32 bits).

Fixes: 05655541c950 ("dmaengine: dw-edma: Fix scatter-gather address calculation")
Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/1778422e389fe40032e216b59b1b992c61ec9887.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dw-edma/dw-edma-core.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index 0793df12401f..53289927dd0d 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -429,7 +429,8 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
 			if (xfer->type == EDMA_XFER_CYCLIC) {
 				burst->dar = xfer->xfer.cyclic.paddr;
 			} else if (xfer->type == EDMA_XFER_SCATTER_GATHER) {
-				burst->dar = dst_addr;
+				src_addr += sg_dma_len(sg);
+				burst->dar = sg_dma_address(sg);
 				/* Unlike the typical assumption by other
 				 * drivers/IPs the peripheral memory isn't
 				 * a FIFO memory, in this case, it's a
@@ -443,7 +444,8 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
 			if (xfer->type == EDMA_XFER_CYCLIC) {
 				burst->sar = xfer->xfer.cyclic.paddr;
 			} else if (xfer->type == EDMA_XFER_SCATTER_GATHER) {
-				burst->sar = src_addr;
+				dst_addr += sg_dma_len(sg);
+				burst->sar = sg_dma_address(sg);
 				/* Unlike the typical assumption by other
 				 * drivers/IPs the peripheral memory isn't
 				 * a FIFO memory, in this case, it's a
@@ -455,8 +457,6 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
 		}
 
 		if (xfer->type == EDMA_XFER_SCATTER_GATHER) {
-			src_addr += sg_dma_len(sg);
-			dst_addr += sg_dma_len(sg);
 			sg = sg_next(sg);
 		} else if (xfer->type == EDMA_XFER_INTERLEAVED &&
 			   xfer->xfer.il->frame_size > 0) {
-- 
cgit v1.2.3


From 84b0aa2e0d91d7974c6cfcb3a1ce230e7366293e Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 18 Feb 2021 20:04:09 +0100
Subject: dmaengine: dw-edma: Add pcim_iomap_table return check

Currently, is missing a null check on a pcim_iomap_table() return value
and this can lead to a null pointer dereference if the desired BAR
wasn't mapped previously.
Fix this by adding a null check and returning -ENOMEM.

Addresses-Coverity: ("Dereference null return")
Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/bc5e6b8632c84660bb6dae454980e9419992ed14.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dw-edma/dw-edma-pcie.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'drivers')

diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c
index fa66e0380e6d..44f6e09bdb53 100644
--- a/drivers/dma/dw-edma/dw-edma-pcie.c
+++ b/drivers/dma/dw-edma/dw-edma-pcie.c
@@ -240,6 +240,9 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	dw->rd_ch_cnt = vsec_data.rd_ch_cnt;
 
 	dw->rg_region.vaddr = pcim_iomap_table(pdev)[vsec_data.rg.bar];
+	if (!dw->rg_region.vaddr)
+		return -ENOMEM;
+
 	dw->rg_region.vaddr += vsec_data.rg.off;
 	dw->rg_region.paddr = pdev->resource[vsec_data.rg.bar].start;
 	dw->rg_region.paddr += vsec_data.rg.off;
@@ -252,12 +255,18 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 		struct dw_edma_block *dt_block = &vsec_data.dt_wr[i];
 
 		ll_region->vaddr = pcim_iomap_table(pdev)[ll_block->bar];
+		if (!ll_region->vaddr)
+			return -ENOMEM;
+
 		ll_region->vaddr += ll_block->off;
 		ll_region->paddr = pdev->resource[ll_block->bar].start;
 		ll_region->paddr += ll_block->off;
 		ll_region->sz = ll_block->sz;
 
 		dt_region->vaddr = pcim_iomap_table(pdev)[dt_block->bar];
+		if (!dt_region->vaddr)
+			return -ENOMEM;
+
 		dt_region->vaddr += dt_block->off;
 		dt_region->paddr = pdev->resource[dt_block->bar].start;
 		dt_region->paddr += dt_block->off;
@@ -271,12 +280,18 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 		struct dw_edma_block *dt_block = &vsec_data.dt_rd[i];
 
 		ll_region->vaddr = pcim_iomap_table(pdev)[ll_block->bar];
+		if (!ll_region->vaddr)
+			return -ENOMEM;
+
 		ll_region->vaddr += ll_block->off;
 		ll_region->paddr = pdev->resource[ll_block->bar].start;
 		ll_region->paddr += ll_block->off;
 		ll_region->sz = ll_block->sz;
 
 		dt_region->vaddr = pcim_iomap_table(pdev)[dt_block->bar];
+		if (!dt_region->vaddr)
+			return -ENOMEM;
+
 		dt_region->vaddr += dt_block->off;
 		dt_region->paddr = pdev->resource[dt_block->bar].start;
 		dt_region->paddr += dt_block->off;
-- 
cgit v1.2.3


From 2973073a80b46daebc352c31d09d95d16cf6876e Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 1 Mar 2021 08:44:24 +0100
Subject: swiotlb: remove the alloc_size parameter to swiotlb_tbl_unmap_single

Now that swiotlb remembers the allocation size there is no need to pass
it back to swiotlb_tbl_unmap_single.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/iommu/dma-iommu.c | 11 +++--------
 drivers/xen/swiotlb-xen.c |  4 ++--
 include/linux/swiotlb.h   |  1 -
 kernel/dma/direct.h       |  2 +-
 kernel/dma/swiotlb.c      | 45 +++++++++++++++++++++++----------------------
 5 files changed, 29 insertions(+), 34 deletions(-)

(limited to 'drivers')

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index af765c813cc8..9149597410e2 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -499,8 +499,6 @@ static void __iommu_dma_unmap_swiotlb(struct device *dev, dma_addr_t dma_addr,
 		unsigned long attrs)
 {
 	struct iommu_domain *domain = iommu_get_dma_domain(dev);
-	struct iommu_dma_cookie *cookie = domain->iova_cookie;
-	struct iova_domain *iovad = &cookie->iovad;
 	phys_addr_t phys;
 
 	phys = iommu_iova_to_phys(domain, dma_addr);
@@ -510,8 +508,7 @@ static void __iommu_dma_unmap_swiotlb(struct device *dev, dma_addr_t dma_addr,
 	__iommu_dma_unmap(dev, dma_addr, size);
 
 	if (unlikely(is_swiotlb_buffer(phys)))
-		swiotlb_tbl_unmap_single(dev, phys, size,
-				iova_align(iovad, size), dir, attrs);
+		swiotlb_tbl_unmap_single(dev, phys, size, dir, attrs);
 }
 
 static dma_addr_t __iommu_dma_map(struct device *dev, phys_addr_t phys,
@@ -581,10 +578,8 @@ static dma_addr_t __iommu_dma_map_swiotlb(struct device *dev, phys_addr_t phys,
 	}
 
 	iova = __iommu_dma_map(dev, phys, aligned_size, prot, dma_mask);
-	if ((iova == DMA_MAPPING_ERROR) && is_swiotlb_buffer(phys))
-		swiotlb_tbl_unmap_single(dev, phys, org_size,
-				aligned_size, dir, attrs);
-
+	if (iova == DMA_MAPPING_ERROR && is_swiotlb_buffer(phys))
+		swiotlb_tbl_unmap_single(dev, phys, org_size, dir, attrs);
 	return iova;
 }
 
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 2b385c1b4a99..d47f1b311caa 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -406,7 +406,7 @@ static dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page,
 	 * Ensure that the address returned is DMA'ble
 	 */
 	if (unlikely(!dma_capable(dev, dev_addr, size, true))) {
-		swiotlb_tbl_unmap_single(dev, map, size, size, dir,
+		swiotlb_tbl_unmap_single(dev, map, size, dir,
 				attrs | DMA_ATTR_SKIP_CPU_SYNC);
 		return DMA_MAPPING_ERROR;
 	}
@@ -445,7 +445,7 @@ static void xen_swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
 
 	/* NOTE: We use dev_addr here, not paddr! */
 	if (is_xen_swiotlb_buffer(hwdev, dev_addr))
-		swiotlb_tbl_unmap_single(hwdev, paddr, size, size, dir, attrs);
+		swiotlb_tbl_unmap_single(hwdev, paddr, size, dir, attrs);
 }
 
 static void
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 5857a937c637..59f421d041ed 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -57,7 +57,6 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t phys,
 extern void swiotlb_tbl_unmap_single(struct device *hwdev,
 				     phys_addr_t tlb_addr,
 				     size_t mapping_size,
-				     size_t alloc_size,
 				     enum dma_data_direction dir,
 				     unsigned long attrs);
 
diff --git a/kernel/dma/direct.h b/kernel/dma/direct.h
index b98615578737..e1bf721591c0 100644
--- a/kernel/dma/direct.h
+++ b/kernel/dma/direct.h
@@ -114,6 +114,6 @@ static inline void dma_direct_unmap_page(struct device *dev, dma_addr_t addr,
 		dma_direct_sync_single_for_cpu(dev, addr, size, dir);
 
 	if (unlikely(is_swiotlb_buffer(phys)))
-		swiotlb_tbl_unmap_single(dev, phys, size, size, dir, attrs);
+		swiotlb_tbl_unmap_single(dev, phys, size, dir, attrs);
 }
 #endif /* _KERNEL_DMA_DIRECT_H */
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index c10e855a03bc..03aa614565e4 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -102,7 +102,7 @@ static phys_addr_t *io_tlb_orig_addr;
 /*
  * The mapped buffer's size should be validated during a sync operation.
  */
-static size_t *io_tlb_orig_size;
+static size_t *io_tlb_alloc_size;
 
 /*
  * Protect the above data structures in the map and unmap calls
@@ -253,15 +253,15 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
 		      __func__, alloc_size, PAGE_SIZE);
 
 	alloc_size = PAGE_ALIGN(io_tlb_nslabs * sizeof(size_t));
-	io_tlb_orig_size = memblock_alloc(alloc_size, PAGE_SIZE);
-	if (!io_tlb_orig_size)
+	io_tlb_alloc_size = memblock_alloc(alloc_size, PAGE_SIZE);
+	if (!io_tlb_alloc_size)
 		panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
 		      __func__, alloc_size, PAGE_SIZE);
 
 	for (i = 0; i < io_tlb_nslabs; i++) {
 		io_tlb_list[i] = IO_TLB_SEGSIZE - io_tlb_offset(i);
 		io_tlb_orig_addr[i] = INVALID_PHYS_ADDR;
-		io_tlb_orig_size[i] = 0;
+		io_tlb_alloc_size[i] = 0;
 	}
 	io_tlb_index = 0;
 	no_iotlb_memory = false;
@@ -393,18 +393,18 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
 	if (!io_tlb_orig_addr)
 		goto cleanup4;
 
-	io_tlb_orig_size = (size_t *)
+	io_tlb_alloc_size = (size_t *)
 		__get_free_pages(GFP_KERNEL,
 				 get_order(io_tlb_nslabs *
 					   sizeof(size_t)));
-	if (!io_tlb_orig_size)
+	if (!io_tlb_alloc_size)
 		goto cleanup5;
 
 
 	for (i = 0; i < io_tlb_nslabs; i++) {
 		io_tlb_list[i] = IO_TLB_SEGSIZE - io_tlb_offset(i);
 		io_tlb_orig_addr[i] = INVALID_PHYS_ADDR;
-		io_tlb_orig_size[i] = 0;
+		io_tlb_alloc_size[i] = 0;
 	}
 	io_tlb_index = 0;
 	no_iotlb_memory = false;
@@ -436,7 +436,7 @@ void __init swiotlb_exit(void)
 		return;
 
 	if (late_alloc) {
-		free_pages((unsigned long)io_tlb_orig_size,
+		free_pages((unsigned long)io_tlb_alloc_size,
 			   get_order(io_tlb_nslabs * sizeof(size_t)));
 		free_pages((unsigned long)io_tlb_orig_addr,
 			   get_order(io_tlb_nslabs * sizeof(phys_addr_t)));
@@ -447,7 +447,7 @@ void __init swiotlb_exit(void)
 	} else {
 		memblock_free_late(__pa(io_tlb_orig_addr),
 				   PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t)));
-		memblock_free_late(__pa(io_tlb_orig_size),
+		memblock_free_late(__pa(io_tlb_alloc_size),
 				   PAGE_ALIGN(io_tlb_nslabs * sizeof(size_t)));
 		memblock_free_late(__pa(io_tlb_list),
 				   PAGE_ALIGN(io_tlb_nslabs * sizeof(int)));
@@ -639,7 +639,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
 	 */
 	for (i = 0; i < nr_slots(alloc_size + offset); i++) {
 		io_tlb_orig_addr[index + i] = slot_addr(orig_addr, i);
-		io_tlb_orig_size[index+i] = alloc_size - (i << IO_TLB_SHIFT);
+		io_tlb_alloc_size[index+i] = alloc_size - (i << IO_TLB_SHIFT);
 	}
 	tlb_addr = slot_addr(io_tlb_start, index) + offset;
 	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
@@ -648,14 +648,14 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
 	return tlb_addr;
 }
 
-static void validate_sync_size_and_truncate(struct device *hwdev, size_t orig_size, size_t *size)
+static void validate_sync_size_and_truncate(struct device *hwdev, size_t alloc_size, size_t *size)
 {
-	if (*size > orig_size) {
+	if (*size > alloc_size) {
 		/* Warn and truncate mapping_size */
 		dev_WARN_ONCE(hwdev, 1,
 			"Attempt for buffer overflow. Original size: %zu. Mapping size: %zu.\n",
-			orig_size, *size);
-		*size = orig_size;
+			alloc_size, *size);
+		*size = alloc_size;
 	}
 }
 
@@ -663,16 +663,17 @@ static void validate_sync_size_and_truncate(struct device *hwdev, size_t orig_si
  * tlb_addr is the physical address of the bounce buffer to unmap.
  */
 void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
-			      size_t mapping_size, size_t alloc_size,
-			      enum dma_data_direction dir, unsigned long attrs)
+			      size_t mapping_size, enum dma_data_direction dir,
+			      unsigned long attrs)
 {
 	unsigned long flags;
 	unsigned int offset = swiotlb_align_offset(hwdev, tlb_addr);
-	int i, count, nslots = nr_slots(alloc_size + offset);
 	int index = (tlb_addr - offset - io_tlb_start) >> IO_TLB_SHIFT;
 	phys_addr_t orig_addr = io_tlb_orig_addr[index];
+	size_t alloc_size = io_tlb_alloc_size[index];
+	int i, count, nslots = nr_slots(alloc_size + offset);
 
-	validate_sync_size_and_truncate(hwdev, io_tlb_orig_size[index], &mapping_size);
+	validate_sync_size_and_truncate(hwdev, alloc_size, &mapping_size);
 
 	/*
 	 * First, sync the memory before unmapping the entry
@@ -701,7 +702,7 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 	for (i = index + nslots - 1; i >= index; i--) {
 		io_tlb_list[i] = ++count;
 		io_tlb_orig_addr[i] = INVALID_PHYS_ADDR;
-		io_tlb_orig_size[i] = 0;
+		io_tlb_alloc_size[i] = 0;
 	}
 
 	/*
@@ -721,13 +722,13 @@ void swiotlb_tbl_sync_single(struct device *hwdev, phys_addr_t tlb_addr,
 			     enum dma_sync_target target)
 {
 	int index = (tlb_addr - io_tlb_start) >> IO_TLB_SHIFT;
-	size_t orig_size = io_tlb_orig_size[index];
+	size_t alloc_size = io_tlb_alloc_size[index];
 	phys_addr_t orig_addr = io_tlb_orig_addr[index];
 
 	if (orig_addr == INVALID_PHYS_ADDR)
 		return;
 
-	validate_sync_size_and_truncate(hwdev, orig_size, &size);
+	validate_sync_size_and_truncate(hwdev, alloc_size, &size);
 
 	switch (target) {
 	case SYNC_FOR_CPU:
@@ -770,7 +771,7 @@ dma_addr_t swiotlb_map(struct device *dev, phys_addr_t paddr, size_t size,
 	/* Ensure that the address returned is DMA'ble */
 	dma_addr = phys_to_dma_unencrypted(dev, swiotlb_addr);
 	if (unlikely(!dma_capable(dev, dma_addr, size, true))) {
-		swiotlb_tbl_unmap_single(dev, swiotlb_addr, size, size, dir,
+		swiotlb_tbl_unmap_single(dev, swiotlb_addr, size, dir,
 			attrs | DMA_ATTR_SKIP_CPU_SYNC);
 		dev_WARN_ONCE(dev, 1,
 			"swiotlb addr %pad+%zu overflow (mask %llx, bus limit %llx).\n",
-- 
cgit v1.2.3


From 80808d273a3f075196d1a26463f65d4c9d2891c8 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 1 Mar 2021 08:44:26 +0100
Subject: swiotlb: split swiotlb_tbl_sync_single

Split swiotlb_tbl_sync_single into two separate funtions for the to device
and to cpu synchronization.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/iommu/dma-iommu.c | 12 ++++++------
 drivers/xen/swiotlb-xen.c |  4 ++--
 include/linux/swiotlb.h   | 17 ++++-------------
 kernel/dma/direct.c       |  8 ++++----
 kernel/dma/direct.h       |  4 ++--
 kernel/dma/swiotlb.c      | 34 +++++++++++++++-------------------
 6 files changed, 33 insertions(+), 46 deletions(-)

(limited to 'drivers')

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 9149597410e2..3087d9fa6065 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -750,7 +750,7 @@ static void iommu_dma_sync_single_for_cpu(struct device *dev,
 		arch_sync_dma_for_cpu(phys, size, dir);
 
 	if (is_swiotlb_buffer(phys))
-		swiotlb_tbl_sync_single(dev, phys, size, dir, SYNC_FOR_CPU);
+		swiotlb_sync_single_for_cpu(dev, phys, size, dir);
 }
 
 static void iommu_dma_sync_single_for_device(struct device *dev,
@@ -763,7 +763,7 @@ static void iommu_dma_sync_single_for_device(struct device *dev,
 
 	phys = iommu_iova_to_phys(iommu_get_dma_domain(dev), dma_handle);
 	if (is_swiotlb_buffer(phys))
-		swiotlb_tbl_sync_single(dev, phys, size, dir, SYNC_FOR_DEVICE);
+		swiotlb_sync_single_for_device(dev, phys, size, dir);
 
 	if (!dev_is_dma_coherent(dev))
 		arch_sync_dma_for_device(phys, size, dir);
@@ -784,8 +784,8 @@ static void iommu_dma_sync_sg_for_cpu(struct device *dev,
 			arch_sync_dma_for_cpu(sg_phys(sg), sg->length, dir);
 
 		if (is_swiotlb_buffer(sg_phys(sg)))
-			swiotlb_tbl_sync_single(dev, sg_phys(sg), sg->length,
-						dir, SYNC_FOR_CPU);
+			swiotlb_sync_single_for_cpu(dev, sg_phys(sg),
+						    sg->length, dir);
 	}
 }
 
@@ -801,8 +801,8 @@ static void iommu_dma_sync_sg_for_device(struct device *dev,
 
 	for_each_sg(sgl, sg, nelems, i) {
 		if (is_swiotlb_buffer(sg_phys(sg)))
-			swiotlb_tbl_sync_single(dev, sg_phys(sg), sg->length,
-						dir, SYNC_FOR_DEVICE);
+			swiotlb_sync_single_for_device(dev, sg_phys(sg),
+						       sg->length, dir);
 
 		if (!dev_is_dma_coherent(dev))
 			arch_sync_dma_for_device(sg_phys(sg), sg->length, dir);
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index d47f1b311caa..4e8a4e14942a 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -462,7 +462,7 @@ xen_swiotlb_sync_single_for_cpu(struct device *dev, dma_addr_t dma_addr,
 	}
 
 	if (is_xen_swiotlb_buffer(dev, dma_addr))
-		swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_CPU);
+		swiotlb_sync_single_for_cpu(dev, paddr, size, dir);
 }
 
 static void
@@ -472,7 +472,7 @@ xen_swiotlb_sync_single_for_device(struct device *dev, dma_addr_t dma_addr,
 	phys_addr_t paddr = xen_dma_to_phys(dev, dma_addr);
 
 	if (is_xen_swiotlb_buffer(dev, dma_addr))
-		swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_DEVICE);
+		swiotlb_sync_single_for_device(dev, paddr, size, dir);
 
 	if (!dev_is_dma_coherent(dev)) {
 		if (pfn_valid(PFN_DOWN(dma_to_phys(dev, dma_addr))))
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 59f421d041ed..0696bdc8072e 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -42,14 +42,6 @@ extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs);
 extern int swiotlb_late_init_with_default_size(size_t default_size);
 extern void __init swiotlb_update_mem_attributes(void);
 
-/*
- * Enumeration for sync targets
- */
-enum dma_sync_target {
-	SYNC_FOR_CPU = 0,
-	SYNC_FOR_DEVICE = 1,
-};
-
 phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t phys,
 		size_t mapping_size, size_t alloc_size,
 		enum dma_data_direction dir, unsigned long attrs);
@@ -60,11 +52,10 @@ extern void swiotlb_tbl_unmap_single(struct device *hwdev,
 				     enum dma_data_direction dir,
 				     unsigned long attrs);
 
-extern void swiotlb_tbl_sync_single(struct device *hwdev,
-				    phys_addr_t tlb_addr,
-				    size_t size, enum dma_data_direction dir,
-				    enum dma_sync_target target);
-
+void swiotlb_sync_single_for_device(struct device *dev, phys_addr_t tlb_addr,
+		size_t size, enum dma_data_direction dir);
+void swiotlb_sync_single_for_cpu(struct device *dev, phys_addr_t tlb_addr,
+		size_t size, enum dma_data_direction dir);
 dma_addr_t swiotlb_map(struct device *dev, phys_addr_t phys,
 		size_t size, enum dma_data_direction dir, unsigned long attrs);
 
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index 002268262c9a..f737e3347059 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -344,8 +344,8 @@ void dma_direct_sync_sg_for_device(struct device *dev,
 		phys_addr_t paddr = dma_to_phys(dev, sg_dma_address(sg));
 
 		if (unlikely(is_swiotlb_buffer(paddr)))
-			swiotlb_tbl_sync_single(dev, paddr, sg->length,
-					dir, SYNC_FOR_DEVICE);
+			swiotlb_sync_single_for_device(dev, paddr, sg->length,
+						       dir);
 
 		if (!dev_is_dma_coherent(dev))
 			arch_sync_dma_for_device(paddr, sg->length,
@@ -370,8 +370,8 @@ void dma_direct_sync_sg_for_cpu(struct device *dev,
 			arch_sync_dma_for_cpu(paddr, sg->length, dir);
 
 		if (unlikely(is_swiotlb_buffer(paddr)))
-			swiotlb_tbl_sync_single(dev, paddr, sg->length, dir,
-					SYNC_FOR_CPU);
+			swiotlb_sync_single_for_cpu(dev, paddr, sg->length,
+						    dir);
 
 		if (dir == DMA_FROM_DEVICE)
 			arch_dma_mark_clean(paddr, sg->length);
diff --git a/kernel/dma/direct.h b/kernel/dma/direct.h
index e1bf721591c0..50afc05b6f1d 100644
--- a/kernel/dma/direct.h
+++ b/kernel/dma/direct.h
@@ -57,7 +57,7 @@ static inline void dma_direct_sync_single_for_device(struct device *dev,
 	phys_addr_t paddr = dma_to_phys(dev, addr);
 
 	if (unlikely(is_swiotlb_buffer(paddr)))
-		swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_DEVICE);
+		swiotlb_sync_single_for_device(dev, paddr, size, dir);
 
 	if (!dev_is_dma_coherent(dev))
 		arch_sync_dma_for_device(paddr, size, dir);
@@ -74,7 +74,7 @@ static inline void dma_direct_sync_single_for_cpu(struct device *dev,
 	}
 
 	if (unlikely(is_swiotlb_buffer(paddr)))
-		swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_CPU);
+		swiotlb_sync_single_for_cpu(dev, paddr, size, dir);
 
 	if (dir == DMA_FROM_DEVICE)
 		arch_dma_mark_clean(paddr, size);
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index a431c6b64e82..5fe8781be6f2 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -715,26 +715,22 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 	spin_unlock_irqrestore(&io_tlb_lock, flags);
 }
 
-void swiotlb_tbl_sync_single(struct device *hwdev, phys_addr_t tlb_addr,
-			     size_t size, enum dma_data_direction dir,
-			     enum dma_sync_target target)
+void swiotlb_sync_single_for_device(struct device *dev, phys_addr_t tlb_addr,
+		size_t size, enum dma_data_direction dir)
 {
-	switch (target) {
-	case SYNC_FOR_CPU:
-		if (likely(dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
-			swiotlb_bounce(hwdev, tlb_addr, size, DMA_FROM_DEVICE);
-		else
-			BUG_ON(dir != DMA_TO_DEVICE);
-		break;
-	case SYNC_FOR_DEVICE:
-		if (likely(dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL))
-			swiotlb_bounce(hwdev, tlb_addr, size, DMA_TO_DEVICE);
-		else
-			BUG_ON(dir != DMA_FROM_DEVICE);
-		break;
-	default:
-		BUG();
-	}
+	if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL)
+		swiotlb_bounce(dev, tlb_addr, size, DMA_TO_DEVICE);
+	else
+		BUG_ON(dir != DMA_FROM_DEVICE);
+}
+
+void swiotlb_sync_single_for_cpu(struct device *dev, phys_addr_t tlb_addr,
+		size_t size, enum dma_data_direction dir)
+{
+	if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)
+		swiotlb_bounce(dev, tlb_addr, size, DMA_FROM_DEVICE);
+	else
+		BUG_ON(dir != DMA_TO_DEVICE);
 }
 
 /*
-- 
cgit v1.2.3


From 16bc75f3aa3963588b13b01f6dad589f85d9f733 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 1 Mar 2021 08:44:27 +0100
Subject: xen-swiotlb: use is_swiotlb_buffer in is_xen_swiotlb_buffer

Use the is_swiotlb_buffer to check if a physical address is
a swiotlb buffer.  This works because xen-swiotlb does use the
same buffer as the main swiotlb code, and xen_io_tlb_{start,end}
are just the addresses for it that went through phys_to_virt.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/xen/swiotlb-xen.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 4e8a4e14942a..bffb35993c9d 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -111,10 +111,8 @@ static int is_xen_swiotlb_buffer(struct device *dev, dma_addr_t dma_addr)
 	 * have the same virtual address as another address
 	 * in our domain. Therefore _only_ check address within our domain.
 	 */
-	if (pfn_valid(PFN_DOWN(paddr))) {
-		return paddr >= virt_to_phys(xen_io_tlb_start) &&
-		       paddr < virt_to_phys(xen_io_tlb_end);
-	}
+	if (pfn_valid(PFN_DOWN(paddr)))
+		return is_swiotlb_buffer(paddr);
 	return 0;
 }
 
-- 
cgit v1.2.3


From 6223d1cef7b462de9aeede5846e6dcdbbd1c4d60 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 1 Mar 2021 08:44:28 +0100
Subject: xen-swiotlb: use io_tlb_end in xen_swiotlb_dma_supported

Use the existing variable that holds the physical address for
xen_io_tlb_end to simplify xen_swiotlb_dma_supported a bit, and remove
the otherwise unused xen_io_tlb_end variable and the xen_virt_to_bus
helper.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/xen/swiotlb-xen.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

(limited to 'drivers')

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index bffb35993c9d..e99f0614dcb9 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -46,7 +46,7 @@
  * API.
  */
 
-static char *xen_io_tlb_start, *xen_io_tlb_end;
+static char *xen_io_tlb_start;
 static unsigned long xen_io_tlb_nslabs;
 /*
  * Quick lookup value of the bus address of the IOTLB.
@@ -82,11 +82,6 @@ static inline phys_addr_t xen_dma_to_phys(struct device *dev,
 	return xen_bus_to_phys(dev, dma_to_phys(dev, dma_addr));
 }
 
-static inline dma_addr_t xen_virt_to_bus(struct device *dev, void *address)
-{
-	return xen_phys_to_dma(dev, virt_to_phys(address));
-}
-
 static inline int range_straddles_page_boundary(phys_addr_t p, size_t size)
 {
 	unsigned long next_bfn, xen_pfn = XEN_PFN_DOWN(p);
@@ -250,7 +245,6 @@ retry:
 		rc = swiotlb_late_init_with_tbl(xen_io_tlb_start, xen_io_tlb_nslabs);
 
 end:
-	xen_io_tlb_end = xen_io_tlb_start + bytes;
 	if (!rc)
 		swiotlb_set_max_segment(PAGE_SIZE);
 
@@ -558,7 +552,7 @@ xen_swiotlb_sync_sg_for_device(struct device *dev, struct scatterlist *sgl,
 static int
 xen_swiotlb_dma_supported(struct device *hwdev, u64 mask)
 {
-	return xen_virt_to_bus(hwdev, xen_io_tlb_end - 1) <= mask;
+	return xen_phys_to_dma(hwdev, io_tlb_end - 1) <= mask;
 }
 
 const struct dma_map_ops xen_swiotlb_dma_ops = {
-- 
cgit v1.2.3


From 4035b43da6daa51668830becfe8537841414946b Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 1 Mar 2021 08:44:29 +0100
Subject: xen-swiotlb: remove xen_set_nslabs

The xen_set_nslabs function is a little weird, as it has just one
caller, that caller passes a global variable as the argument,
which is then overriden in the function and a derivative of it
returned.  Just add a cpp symbol for the default size using a readable
constant and open code the remaining three lines in the caller.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/xen/swiotlb-xen.c | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

(limited to 'drivers')

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index e99f0614dcb9..5352655432e7 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -138,16 +138,6 @@ xen_swiotlb_fixup(void *buf, size_t size, unsigned long nslabs)
 	} while (i < nslabs);
 	return 0;
 }
-static unsigned long xen_set_nslabs(unsigned long nr_tbl)
-{
-	if (!nr_tbl) {
-		xen_io_tlb_nslabs = (64 * 1024 * 1024 >> IO_TLB_SHIFT);
-		xen_io_tlb_nslabs = ALIGN(xen_io_tlb_nslabs, IO_TLB_SEGSIZE);
-	} else
-		xen_io_tlb_nslabs = nr_tbl;
-
-	return xen_io_tlb_nslabs << IO_TLB_SHIFT;
-}
 
 enum xen_swiotlb_err {
 	XEN_SWIOTLB_UNKNOWN = 0,
@@ -170,6 +160,9 @@ static const char *xen_swiotlb_error(enum xen_swiotlb_err err)
 	}
 	return "";
 }
+
+#define DEFAULT_NSLABS		ALIGN(SZ_64M >> IO_TLB_SHIFT, IO_TLB_SEGSIZE)
+
 int __ref xen_swiotlb_init(int verbose, bool early)
 {
 	unsigned long bytes, order;
@@ -179,8 +172,10 @@ int __ref xen_swiotlb_init(int verbose, bool early)
 
 	xen_io_tlb_nslabs = swiotlb_nr_tbl();
 retry:
-	bytes = xen_set_nslabs(xen_io_tlb_nslabs);
-	order = get_order(xen_io_tlb_nslabs << IO_TLB_SHIFT);
+	if (!xen_io_tlb_nslabs)
+		xen_io_tlb_nslabs = DEFAULT_NSLABS;
+	bytes = xen_io_tlb_nslabs << IO_TLB_SHIFT;
+	order = get_order(bytes);
 
 	/*
 	 * IO TLB memory already allocated. Just use it.
-- 
cgit v1.2.3


From cbce99527ca7c4e98db9890651d5e9dfc2fb89ac Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 1 Mar 2021 08:44:30 +0100
Subject: xen-swiotlb: remove xen_io_tlb_start and xen_io_tlb_nslabs

The xen_io_tlb_start and xen_io_tlb_nslabs variables are now only used in
xen_swiotlb_init, so replace them with local variables.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/xen/swiotlb-xen.c | 57 +++++++++++++++++++++--------------------------
 1 file changed, 25 insertions(+), 32 deletions(-)

(limited to 'drivers')

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 5352655432e7..1a31ddf71397 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -40,14 +40,7 @@
 
 #include <trace/events/swiotlb.h>
 #define MAX_DMA_BITS 32
-/*
- * Used to do a quick range check in swiotlb_tbl_unmap_single and
- * swiotlb_tbl_sync_single_*, to see if the memory was in fact allocated by this
- * API.
- */
 
-static char *xen_io_tlb_start;
-static unsigned long xen_io_tlb_nslabs;
 /*
  * Quick lookup value of the bus address of the IOTLB.
  */
@@ -169,75 +162,75 @@ int __ref xen_swiotlb_init(int verbose, bool early)
 	int rc = -ENOMEM;
 	enum xen_swiotlb_err m_ret = XEN_SWIOTLB_UNKNOWN;
 	unsigned int repeat = 3;
+	char *start;
+	unsigned long nslabs;
 
-	xen_io_tlb_nslabs = swiotlb_nr_tbl();
+	nslabs = swiotlb_nr_tbl();
 retry:
-	if (!xen_io_tlb_nslabs)
-		xen_io_tlb_nslabs = DEFAULT_NSLABS;
-	bytes = xen_io_tlb_nslabs << IO_TLB_SHIFT;
+	if (!nslabs)
+		nslabs = DEFAULT_NSLABS;
+	bytes = nslabs << IO_TLB_SHIFT;
 	order = get_order(bytes);
 
 	/*
 	 * IO TLB memory already allocated. Just use it.
 	 */
-	if (io_tlb_start != 0) {
-		xen_io_tlb_start = phys_to_virt(io_tlb_start);
+	if (io_tlb_start != 0)
 		goto end;
-	}
 
 	/*
 	 * Get IO TLB memory from any location.
 	 */
 	if (early) {
-		xen_io_tlb_start = memblock_alloc(PAGE_ALIGN(bytes),
+		start = memblock_alloc(PAGE_ALIGN(bytes),
 						  PAGE_SIZE);
-		if (!xen_io_tlb_start)
+		if (!start)
 			panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
 			      __func__, PAGE_ALIGN(bytes), PAGE_SIZE);
 	} else {
 #define SLABS_PER_PAGE (1 << (PAGE_SHIFT - IO_TLB_SHIFT))
 #define IO_TLB_MIN_SLABS ((1<<20) >> IO_TLB_SHIFT)
 		while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) {
-			xen_io_tlb_start = (void *)xen_get_swiotlb_free_pages(order);
-			if (xen_io_tlb_start)
+			start = (void *)xen_get_swiotlb_free_pages(order);
+			if (start)
 				break;
 			order--;
 		}
 		if (order != get_order(bytes)) {
 			pr_warn("Warning: only able to allocate %ld MB for software IO TLB\n",
 				(PAGE_SIZE << order) >> 20);
-			xen_io_tlb_nslabs = SLABS_PER_PAGE << order;
-			bytes = xen_io_tlb_nslabs << IO_TLB_SHIFT;
+			nslabs = SLABS_PER_PAGE << order;
+			bytes = nslabs << IO_TLB_SHIFT;
 		}
 	}
-	if (!xen_io_tlb_start) {
+	if (!start) {
 		m_ret = XEN_SWIOTLB_ENOMEM;
 		goto error;
 	}
 	/*
 	 * And replace that memory with pages under 4GB.
 	 */
-	rc = xen_swiotlb_fixup(xen_io_tlb_start,
+	rc = xen_swiotlb_fixup(start,
 			       bytes,
-			       xen_io_tlb_nslabs);
+			       nslabs);
 	if (rc) {
 		if (early)
-			memblock_free(__pa(xen_io_tlb_start),
+			memblock_free(__pa(start),
 				      PAGE_ALIGN(bytes));
 		else {
-			free_pages((unsigned long)xen_io_tlb_start, order);
-			xen_io_tlb_start = NULL;
+			free_pages((unsigned long)start, order);
+			start = NULL;
 		}
 		m_ret = XEN_SWIOTLB_EFIXUP;
 		goto error;
 	}
 	if (early) {
-		if (swiotlb_init_with_tbl(xen_io_tlb_start, xen_io_tlb_nslabs,
+		if (swiotlb_init_with_tbl(start, nslabs,
 			 verbose))
 			panic("Cannot allocate SWIOTLB buffer");
 		rc = 0;
 	} else
-		rc = swiotlb_late_init_with_tbl(xen_io_tlb_start, xen_io_tlb_nslabs);
+		rc = swiotlb_late_init_with_tbl(start, nslabs);
 
 end:
 	if (!rc)
@@ -246,17 +239,17 @@ end:
 	return rc;
 error:
 	if (repeat--) {
-		xen_io_tlb_nslabs = max(1024UL, /* Min is 2MB */
-					(xen_io_tlb_nslabs >> 1));
+		nslabs = max(1024UL, /* Min is 2MB */
+					(nslabs >> 1));
 		pr_info("Lowering to %luMB\n",
-			(xen_io_tlb_nslabs << IO_TLB_SHIFT) >> 20);
+			(nslabs << IO_TLB_SHIFT) >> 20);
 		goto retry;
 	}
 	pr_err("%s (rc:%d)\n", xen_swiotlb_error(m_ret), rc);
 	if (early)
 		panic("%s (rc:%d)", xen_swiotlb_error(m_ret), rc);
 	else
-		free_pages((unsigned long)xen_io_tlb_start, order);
+		free_pages((unsigned long)start, order);
 	return rc;
 }
 
-- 
cgit v1.2.3


From 5d0538b2b884f7fd239f6ab3b667148dc57123f1 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 1 Mar 2021 08:44:31 +0100
Subject: swiotlb: lift the double initialization protection from xen-swiotlb

Lift the double initialization protection from xen-swiotlb to the core
code to avoid exposing too many swiotlb internals.  Also upgrade the
check to a warning as it should not happen.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/xen/swiotlb-xen.c | 7 -------
 kernel/dma/swiotlb.c      | 8 ++++++++
 2 files changed, 8 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 1a31ddf71397..060eeb056486 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -172,12 +172,6 @@ retry:
 	bytes = nslabs << IO_TLB_SHIFT;
 	order = get_order(bytes);
 
-	/*
-	 * IO TLB memory already allocated. Just use it.
-	 */
-	if (io_tlb_start != 0)
-		goto end;
-
 	/*
 	 * Get IO TLB memory from any location.
 	 */
@@ -232,7 +226,6 @@ retry:
 	} else
 		rc = swiotlb_late_init_with_tbl(start, nslabs);
 
-end:
 	if (!rc)
 		swiotlb_set_max_segment(PAGE_SIZE);
 
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 5fe8781be6f2..35e24f0ff8b2 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -229,6 +229,10 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
 	unsigned long i, bytes;
 	size_t alloc_size;
 
+	/* protect against double initialization */
+	if (WARN_ON_ONCE(io_tlb_start))
+		return -ENOMEM;
+
 	bytes = nslabs << IO_TLB_SHIFT;
 
 	io_tlb_nslabs = nslabs;
@@ -367,6 +371,10 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
 {
 	unsigned long i, bytes;
 
+	/* protect against double initialization */
+	if (WARN_ON_ONCE(io_tlb_start))
+		return -ENOMEM;
+
 	bytes = nslabs << IO_TLB_SHIFT;
 
 	io_tlb_nslabs = nslabs;
-- 
cgit v1.2.3


From a98f565462f0fca9096e8f53933364dc2a74bc90 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 1 Mar 2021 08:44:32 +0100
Subject: xen-swiotlb: split xen_swiotlb_init

Split xen_swiotlb_init into a normal an an early case.  That makes both
much simpler and more readable, and also allows marking the early
code as __init and x86-only.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 arch/arm/xen/mm.c              |   2 +-
 arch/x86/xen/pci-swiotlb-xen.c |   4 +-
 drivers/xen/swiotlb-xen.c      | 124 +++++++++++++++++++++++------------------
 include/xen/swiotlb-xen.h      |   3 +-
 4 files changed, 75 insertions(+), 58 deletions(-)

(limited to 'drivers')

diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c
index 467fa225c3d0..aae950cd053f 100644
--- a/arch/arm/xen/mm.c
+++ b/arch/arm/xen/mm.c
@@ -140,7 +140,7 @@ static int __init xen_mm_init(void)
 	struct gnttab_cache_flush cflush;
 	if (!xen_initial_domain())
 		return 0;
-	xen_swiotlb_init(1, false);
+	xen_swiotlb_init();
 
 	cflush.op = 0;
 	cflush.a.dev_bus_addr = 0;
diff --git a/arch/x86/xen/pci-swiotlb-xen.c b/arch/x86/xen/pci-swiotlb-xen.c
index 19ae3e4fe4e9..54f9aa7e8457 100644
--- a/arch/x86/xen/pci-swiotlb-xen.c
+++ b/arch/x86/xen/pci-swiotlb-xen.c
@@ -59,7 +59,7 @@ int __init pci_xen_swiotlb_detect(void)
 void __init pci_xen_swiotlb_init(void)
 {
 	if (xen_swiotlb) {
-		xen_swiotlb_init(1, true /* early */);
+		xen_swiotlb_init_early();
 		dma_ops = &xen_swiotlb_dma_ops;
 
 #ifdef CONFIG_PCI
@@ -76,7 +76,7 @@ int pci_xen_swiotlb_init_late(void)
 	if (xen_swiotlb)
 		return 0;
 
-	rc = xen_swiotlb_init(1, false /* late */);
+	rc = xen_swiotlb_init();
 	if (rc)
 		return rc;
 
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 060eeb056486..00adeb95ebb9 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -156,96 +156,112 @@ static const char *xen_swiotlb_error(enum xen_swiotlb_err err)
 
 #define DEFAULT_NSLABS		ALIGN(SZ_64M >> IO_TLB_SHIFT, IO_TLB_SEGSIZE)
 
-int __ref xen_swiotlb_init(int verbose, bool early)
+int __ref xen_swiotlb_init(void)
 {
-	unsigned long bytes, order;
-	int rc = -ENOMEM;
 	enum xen_swiotlb_err m_ret = XEN_SWIOTLB_UNKNOWN;
+	unsigned long nslabs, bytes, order;
 	unsigned int repeat = 3;
+	int rc = -ENOMEM;
 	char *start;
-	unsigned long nslabs;
 
 	nslabs = swiotlb_nr_tbl();
-retry:
 	if (!nslabs)
 		nslabs = DEFAULT_NSLABS;
+retry:
+	m_ret = XEN_SWIOTLB_ENOMEM;
 	bytes = nslabs << IO_TLB_SHIFT;
 	order = get_order(bytes);
 
 	/*
 	 * Get IO TLB memory from any location.
 	 */
-	if (early) {
-		start = memblock_alloc(PAGE_ALIGN(bytes),
-						  PAGE_SIZE);
-		if (!start)
-			panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
-			      __func__, PAGE_ALIGN(bytes), PAGE_SIZE);
-	} else {
 #define SLABS_PER_PAGE (1 << (PAGE_SHIFT - IO_TLB_SHIFT))
 #define IO_TLB_MIN_SLABS ((1<<20) >> IO_TLB_SHIFT)
-		while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) {
-			start = (void *)xen_get_swiotlb_free_pages(order);
-			if (start)
-				break;
-			order--;
-		}
-		if (order != get_order(bytes)) {
-			pr_warn("Warning: only able to allocate %ld MB for software IO TLB\n",
-				(PAGE_SIZE << order) >> 20);
-			nslabs = SLABS_PER_PAGE << order;
-			bytes = nslabs << IO_TLB_SHIFT;
-		}
+	while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) {
+		start = (void *)xen_get_swiotlb_free_pages(order);
+		if (start)
+			break;
+		order--;
 	}
-	if (!start) {
-		m_ret = XEN_SWIOTLB_ENOMEM;
+	if (!start)
 		goto error;
+	if (order != get_order(bytes)) {
+		pr_warn("Warning: only able to allocate %ld MB for software IO TLB\n",
+			(PAGE_SIZE << order) >> 20);
+		nslabs = SLABS_PER_PAGE << order;
+		bytes = nslabs << IO_TLB_SHIFT;
 	}
+
 	/*
 	 * And replace that memory with pages under 4GB.
 	 */
-	rc = xen_swiotlb_fixup(start,
-			       bytes,
-			       nslabs);
+	rc = xen_swiotlb_fixup(start, bytes, nslabs);
 	if (rc) {
-		if (early)
-			memblock_free(__pa(start),
-				      PAGE_ALIGN(bytes));
-		else {
-			free_pages((unsigned long)start, order);
-			start = NULL;
-		}
+		free_pages((unsigned long)start, order);
 		m_ret = XEN_SWIOTLB_EFIXUP;
 		goto error;
 	}
-	if (early) {
-		if (swiotlb_init_with_tbl(start, nslabs,
-			 verbose))
-			panic("Cannot allocate SWIOTLB buffer");
-		rc = 0;
-	} else
-		rc = swiotlb_late_init_with_tbl(start, nslabs);
-
-	if (!rc)
-		swiotlb_set_max_segment(PAGE_SIZE);
-
-	return rc;
+	rc = swiotlb_late_init_with_tbl(start, nslabs);
+	if (rc)
+		return rc;
+	swiotlb_set_max_segment(PAGE_SIZE);
+	return 0;
 error:
 	if (repeat--) {
-		nslabs = max(1024UL, /* Min is 2MB */
-					(nslabs >> 1));
+		/* Min is 2MB */
+		nslabs = max(1024UL, (nslabs >> 1));
 		pr_info("Lowering to %luMB\n",
 			(nslabs << IO_TLB_SHIFT) >> 20);
 		goto retry;
 	}
 	pr_err("%s (rc:%d)\n", xen_swiotlb_error(m_ret), rc);
-	if (early)
-		panic("%s (rc:%d)", xen_swiotlb_error(m_ret), rc);
-	else
-		free_pages((unsigned long)start, order);
+	free_pages((unsigned long)start, order);
 	return rc;
 }
 
+#ifdef CONFIG_X86
+void __init xen_swiotlb_init_early(void)
+{
+	unsigned long nslabs, bytes;
+	unsigned int repeat = 3;
+	char *start;
+	int rc;
+
+	nslabs = swiotlb_nr_tbl();
+	if (!nslabs)
+		nslabs = DEFAULT_NSLABS;
+retry:
+	/*
+	 * Get IO TLB memory from any location.
+	 */
+	bytes = nslabs << IO_TLB_SHIFT;
+	start = memblock_alloc(PAGE_ALIGN(bytes), PAGE_SIZE);
+	if (!start)
+		panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
+		      __func__, PAGE_ALIGN(bytes), PAGE_SIZE);
+
+	/*
+	 * And replace that memory with pages under 4GB.
+	 */
+	rc = xen_swiotlb_fixup(start, bytes, nslabs);
+	if (rc) {
+		memblock_free(__pa(start), PAGE_ALIGN(bytes));
+		if (repeat--) {
+			/* Min is 2MB */
+			nslabs = max(1024UL, (nslabs >> 1));
+			pr_info("Lowering to %luMB\n",
+				(nslabs << IO_TLB_SHIFT) >> 20);
+			goto retry;
+		}
+		panic("%s (rc:%d)", xen_swiotlb_error(XEN_SWIOTLB_EFIXUP), rc);
+	}
+
+	if (swiotlb_init_with_tbl(start, nslabs, false))
+		panic("Cannot allocate SWIOTLB buffer");
+	swiotlb_set_max_segment(PAGE_SIZE);
+}
+#endif /* CONFIG_X86 */
+
 static void *
 xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
 			   dma_addr_t *dma_handle, gfp_t flags,
diff --git a/include/xen/swiotlb-xen.h b/include/xen/swiotlb-xen.h
index d5eaf9d682b8..6206b1ec9916 100644
--- a/include/xen/swiotlb-xen.h
+++ b/include/xen/swiotlb-xen.h
@@ -9,7 +9,8 @@ void xen_dma_sync_for_cpu(struct device *dev, dma_addr_t handle,
 void xen_dma_sync_for_device(struct device *dev, dma_addr_t handle,
 			     size_t size, enum dma_data_direction dir);
 
-extern int xen_swiotlb_init(int verbose, bool early);
+int xen_swiotlb_init(void);
+void __init xen_swiotlb_init_early(void);
 extern const struct dma_map_ops xen_swiotlb_dma_ops;
 
 #endif /* __LINUX_SWIOTLB_XEN_H */
-- 
cgit v1.2.3


From 6bcd4ea717f3d26edf3da397c82fc9c2236f4f27 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 1 Mar 2021 08:44:33 +0100
Subject: xen-swiotlb: remove the unused size argument from xen_swiotlb_fixup

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/xen/swiotlb-xen.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 00adeb95ebb9..4ecfce2c6f72 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -104,8 +104,7 @@ static int is_xen_swiotlb_buffer(struct device *dev, dma_addr_t dma_addr)
 	return 0;
 }
 
-static int
-xen_swiotlb_fixup(void *buf, size_t size, unsigned long nslabs)
+static int xen_swiotlb_fixup(void *buf, unsigned long nslabs)
 {
 	int i, rc;
 	int dma_bits;
@@ -195,7 +194,7 @@ retry:
 	/*
 	 * And replace that memory with pages under 4GB.
 	 */
-	rc = xen_swiotlb_fixup(start, bytes, nslabs);
+	rc = xen_swiotlb_fixup(start, nslabs);
 	if (rc) {
 		free_pages((unsigned long)start, order);
 		m_ret = XEN_SWIOTLB_EFIXUP;
@@ -243,7 +242,7 @@ retry:
 	/*
 	 * And replace that memory with pages under 4GB.
 	 */
-	rc = xen_swiotlb_fixup(start, bytes, nslabs);
+	rc = xen_swiotlb_fixup(start, nslabs);
 	if (rc) {
 		memblock_free(__pa(start), PAGE_ALIGN(bytes));
 		if (repeat--) {
-- 
cgit v1.2.3


From 007d81a4519f04fa5ced5e9e28bf70cd753c398d Mon Sep 17 00:00:00 2001
From: Konrad Dybcio <konrad.dybcio@somainline.org>
Date: Thu, 25 Feb 2021 22:31:19 +0100
Subject: thermal/drivers/qcom/tsens_v1: Enable sensor 3 on MSM8976

The sensor *is* in fact used and does report temperature.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Acked-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210225213119.116550-1-konrad.dybcio@somainline.org
---
 drivers/thermal/qcom/tsens-v1.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/qcom/tsens-v1.c b/drivers/thermal/qcom/tsens-v1.c
index 3c19a3800c6d..573e261ccca7 100644
--- a/drivers/thermal/qcom/tsens-v1.c
+++ b/drivers/thermal/qcom/tsens-v1.c
@@ -380,11 +380,11 @@ static const struct tsens_ops ops_8976 = {
 	.get_temp	= get_temp_tsens_valid,
 };
 
-/* Valid for both MSM8956 and MSM8976. Sensor ID 3 is unused. */
+/* Valid for both MSM8956 and MSM8976. */
 struct tsens_plat_data data_8976 = {
 	.num_sensors	= 11,
 	.ops		= &ops_8976,
-	.hw_ids		= (unsigned int[]){0, 1, 2, 4, 5, 6, 7, 8, 9, 10},
+	.hw_ids		= (unsigned int[]){0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10},
 	.feat		= &tsens_v1_feat,
 	.fields		= tsens_v1_regfields,
 };
-- 
cgit v1.2.3


From 60d7b22d25930e5c3e03eca32047e3313fa76897 Mon Sep 17 00:00:00 2001
From: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Date: Thu, 11 Mar 2021 15:04:08 +0100
Subject: rpmsg: char: Rename rpmsg_char_init to rpmsg_chrdev_init

To be coherent with the other functions which are prefixed by
rpmsg_chrdev, rename the rpmsg_char_init function.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Link: https://lore.kernel.org/r/20210311140413.31725-2-arnaud.pouliquen@foss.st.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/rpmsg/rpmsg_char.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
index 4bbbacdbf3bb..9e33b53bbf56 100644
--- a/drivers/rpmsg/rpmsg_char.c
+++ b/drivers/rpmsg/rpmsg_char.c
@@ -543,7 +543,7 @@ static struct rpmsg_driver rpmsg_chrdev_driver = {
 	},
 };
 
-static int rpmsg_char_init(void)
+static int rpmsg_chrdev_init(void)
 {
 	int ret;
 
@@ -569,7 +569,7 @@ static int rpmsg_char_init(void)
 
 	return ret;
 }
-postcore_initcall(rpmsg_char_init);
+postcore_initcall(rpmsg_chrdev_init);
 
 static void rpmsg_chrdev_exit(void)
 {
-- 
cgit v1.2.3


From b4ce7e2ebcc52ff907c5a922bf19c3dfa39dddb1 Mon Sep 17 00:00:00 2001
From: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Date: Thu, 11 Mar 2021 15:04:11 +0100
Subject: rpmsg: char: Use rpmsg_sendto to specify the message destination
 address

When the endpoint device is created by the application, a destination
address is specified in the rpmsg_channel_info structure. Since the
rpmsg_endpoint structure does not store the destination address,
this destination address must be specified when sending a message.

Replaces rpmsg_send with rpmsg_sendto to allow to specify the
destination address. This implementation is requested for compatibly with
some rpmsg backends like the virtio backend.

For this, the GLINK an SMD drivers have been updated to support the
rpmsg_sendto, even if the destination address is ignored for these
backends. For these drivers, the rpmsg_send and rpmsg_trysend ops are
preserved to avoid breaking the legacy.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210311140413.31725-5-arnaud.pouliquen@foss.st.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/rpmsg/qcom_glink_native.c | 16 ++++++++++++++++
 drivers/rpmsg/qcom_smd.c          | 16 ++++++++++++++++
 drivers/rpmsg/rpmsg_char.c        |  4 ++--
 3 files changed, 34 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 27a05167c18c..edae0c9a8236 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -1332,6 +1332,20 @@ static int qcom_glink_trysend(struct rpmsg_endpoint *ept, void *data, int len)
 	return __qcom_glink_send(channel, data, len, false);
 }
 
+static int qcom_glink_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
+{
+	struct glink_channel *channel = to_glink_channel(ept);
+
+	return __qcom_glink_send(channel, data, len, true);
+}
+
+static int qcom_glink_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
+{
+	struct glink_channel *channel = to_glink_channel(ept);
+
+	return __qcom_glink_send(channel, data, len, false);
+}
+
 /*
  * Finds the device_node for the glink child interested in this channel.
  */
@@ -1364,7 +1378,9 @@ static const struct rpmsg_device_ops glink_device_ops = {
 static const struct rpmsg_endpoint_ops glink_endpoint_ops = {
 	.destroy_ept = qcom_glink_destroy_ept,
 	.send = qcom_glink_send,
+	.sendto = qcom_glink_sendto,
 	.trysend = qcom_glink_trysend,
+	.trysendto = qcom_glink_trysendto,
 };
 
 static void qcom_glink_rpdev_release(struct device *dev)
diff --git a/drivers/rpmsg/qcom_smd.c b/drivers/rpmsg/qcom_smd.c
index 19903de6268d..8da1b5cb31b3 100644
--- a/drivers/rpmsg/qcom_smd.c
+++ b/drivers/rpmsg/qcom_smd.c
@@ -974,6 +974,20 @@ static int qcom_smd_trysend(struct rpmsg_endpoint *ept, void *data, int len)
 	return __qcom_smd_send(qsept->qsch, data, len, false);
 }
 
+static int qcom_smd_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
+{
+	struct qcom_smd_endpoint *qsept = to_smd_endpoint(ept);
+
+	return __qcom_smd_send(qsept->qsch, data, len, true);
+}
+
+static int qcom_smd_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
+{
+	struct qcom_smd_endpoint *qsept = to_smd_endpoint(ept);
+
+	return __qcom_smd_send(qsept->qsch, data, len, false);
+}
+
 static __poll_t qcom_smd_poll(struct rpmsg_endpoint *ept,
 				  struct file *filp, poll_table *wait)
 {
@@ -1038,7 +1052,9 @@ static const struct rpmsg_device_ops qcom_smd_device_ops = {
 static const struct rpmsg_endpoint_ops qcom_smd_endpoint_ops = {
 	.destroy_ept = qcom_smd_destroy_ept,
 	.send = qcom_smd_send,
+	.sendto = qcom_smd_sendto,
 	.trysend = qcom_smd_trysend,
+	.trysendto = qcom_smd_trysendto,
 	.poll = qcom_smd_poll,
 };
 
diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
index 9e33b53bbf56..95a65f7a9d8d 100644
--- a/drivers/rpmsg/rpmsg_char.c
+++ b/drivers/rpmsg/rpmsg_char.c
@@ -239,9 +239,9 @@ static ssize_t rpmsg_eptdev_write_iter(struct kiocb *iocb,
 	}
 
 	if (filp->f_flags & O_NONBLOCK)
-		ret = rpmsg_trysend(eptdev->ept, kbuf, len);
+		ret = rpmsg_trysendto(eptdev->ept, kbuf, len, eptdev->chinfo.dst);
 	else
-		ret = rpmsg_send(eptdev->ept, kbuf, len);
+		ret = rpmsg_sendto(eptdev->ept, kbuf, len, eptdev->chinfo.dst);
 
 unlock_eptdev:
 	mutex_unlock(&eptdev->ept_lock);
-- 
cgit v1.2.3


From c486682ae1e2b149add22f44cf413b3103e3ef39 Mon Sep 17 00:00:00 2001
From: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Date: Thu, 11 Mar 2021 15:04:12 +0100
Subject: rpmsg: virtio: Register the rpmsg_char device

Instantiate the rpmsg_char device on virtio RPMsg bus creation.
This provides the capability, with the RPMSG_CREATE_EPT_IOCTL ioctl,
to create RPMsg char device endpoints relying on the
rpmsg_chrdev_create_eptdev API.

Notice that the created endpoints are attached to the rpmsg_ctldev
device, but not associated to a channel.
As consequence, the endpoint source and destination addresses have to
been specified and there is no channel creation and no name service
announcement to inform the remote side.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Link: https://lore.kernel.org/r/20210311140413.31725-6-arnaud.pouliquen@foss.st.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/rpmsg/virtio_rpmsg_bus.c | 62 ++++++++++++++++++++++++++++++++++++----
 1 file changed, 57 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index e87d4cf926eb..8e49a3bacfc7 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -813,14 +813,57 @@ static void rpmsg_xmit_done(struct virtqueue *svq)
 	wake_up_interruptible(&vrp->sendq);
 }
 
+/*
+ * Called to expose to user a /dev/rpmsg_ctrlX interface allowing to
+ * create endpoint-to-endpoint communication without associated RPMsg channel.
+ * The endpoints are rattached to the ctrldev RPMsg device.
+ */
+static struct rpmsg_device *rpmsg_virtio_add_ctrl_dev(struct virtio_device *vdev)
+{
+	struct virtproc_info *vrp = vdev->priv;
+	struct virtio_rpmsg_channel *vch;
+	struct rpmsg_device *rpdev_ctrl;
+	int err = 0;
+
+	vch = kzalloc(sizeof(*vch), GFP_KERNEL);
+	if (!vch)
+		return ERR_PTR(-ENOMEM);
+
+	/* Link the channel to the vrp */
+	vch->vrp = vrp;
+
+	/* Assign public information to the rpmsg_device */
+	rpdev_ctrl = &vch->rpdev;
+	rpdev_ctrl->ops = &virtio_rpmsg_ops;
+
+	rpdev_ctrl->dev.parent = &vrp->vdev->dev;
+	rpdev_ctrl->dev.release = virtio_rpmsg_release_device;
+	rpdev_ctrl->little_endian = virtio_is_little_endian(vrp->vdev);
+
+	err = rpmsg_chrdev_register_device(rpdev_ctrl);
+	if (err) {
+		kfree(vch);
+		return ERR_PTR(err);
+	}
+
+	return rpdev_ctrl;
+}
+
+static void rpmsg_virtio_del_ctrl_dev(struct rpmsg_device *rpdev_ctrl)
+{
+	if (!rpdev_ctrl)
+		return;
+	kfree(to_virtio_rpmsg_channel(rpdev_ctrl));
+}
+
 static int rpmsg_probe(struct virtio_device *vdev)
 {
 	vq_callback_t *vq_cbs[] = { rpmsg_recv_done, rpmsg_xmit_done };
 	static const char * const names[] = { "input", "output" };
 	struct virtqueue *vqs[2];
 	struct virtproc_info *vrp;
-	struct virtio_rpmsg_channel *vch;
-	struct rpmsg_device *rpdev_ns;
+	struct virtio_rpmsg_channel *vch = NULL;
+	struct rpmsg_device *rpdev_ns, *rpdev_ctrl;
 	void *bufs_va;
 	int err = 0, i;
 	size_t total_buf_space;
@@ -894,12 +937,18 @@ static int rpmsg_probe(struct virtio_device *vdev)
 
 	vdev->priv = vrp;
 
+	rpdev_ctrl = rpmsg_virtio_add_ctrl_dev(vdev);
+	if (IS_ERR(rpdev_ctrl)) {
+		err = PTR_ERR(rpdev_ctrl);
+		goto free_coherent;
+	}
+
 	/* if supported by the remote processor, enable the name service */
 	if (virtio_has_feature(vdev, VIRTIO_RPMSG_F_NS)) {
 		vch = kzalloc(sizeof(*vch), GFP_KERNEL);
 		if (!vch) {
 			err = -ENOMEM;
-			goto free_coherent;
+			goto free_ctrldev;
 		}
 
 		/* Link the channel to our vrp */
@@ -915,7 +964,7 @@ static int rpmsg_probe(struct virtio_device *vdev)
 
 		err = rpmsg_ns_register_device(rpdev_ns);
 		if (err)
-			goto free_coherent;
+			goto free_vch;
 	}
 
 	/*
@@ -939,8 +988,11 @@ static int rpmsg_probe(struct virtio_device *vdev)
 
 	return 0;
 
-free_coherent:
+free_vch:
 	kfree(vch);
+free_ctrldev:
+	rpmsg_virtio_del_ctrl_dev(rpdev_ctrl);
+free_coherent:
 	dma_free_coherent(vdev->dev.parent, total_buf_space,
 			  bufs_va, vrp->bufs_dma);
 vqs_del:
-- 
cgit v1.2.3


From 964e8bedd5a13a662e8e418ed763351c07d0dac7 Mon Sep 17 00:00:00 2001
From: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Date: Thu, 11 Mar 2021 15:04:13 +0100
Subject: rpmsg: char: Return an error if device already open

The rpmsg_create_ept function is invoked when the device is opened.
As only one endpoint must be created per device. It is not possible to
open the same device twice. But there is nothing to prevent multi open.
Return -EBUSY when device is already opened to have a generic error
instead of relying on the back-end to potentially detect the error.

Without this patch for instance the GLINK driver return -EBUSY while
the virtio bus return -ENOSPC.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Link: https://lore.kernel.org/r/20210311140413.31725-7-arnaud.pouliquen@foss.st.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/rpmsg/rpmsg_char.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
index 95a65f7a9d8d..2bebc9b2d163 100644
--- a/drivers/rpmsg/rpmsg_char.c
+++ b/drivers/rpmsg/rpmsg_char.c
@@ -127,6 +127,9 @@ static int rpmsg_eptdev_open(struct inode *inode, struct file *filp)
 	struct rpmsg_device *rpdev = eptdev->rpdev;
 	struct device *dev = &eptdev->dev;
 
+	if (eptdev->ept)
+		return -EBUSY;
+
 	get_device(dev);
 
 	ept = rpmsg_create_ept(rpdev, rpmsg_ept_cb, eptdev, eptdev->chinfo);
-- 
cgit v1.2.3


From 1cb8f3e2d8fe7533c26df9925a83bd3d185b312e Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Wed, 20 Jan 2021 14:25:37 +0100
Subject: hwspinlock: remove sirf driver

The CSR SiRF prima2/atlas platforms are getting removed, so this driver
is no longer needed.

Cc: Barry Song <baohua@kernel.org>
Link: https://lore.kernel.org/linux-arm-kernel/20210120124812.2800027-1-arnd@kernel.org/T/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210120132537.2285157-1-arnd@kernel.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 .../devicetree/bindings/hwlock/sirf,hwspinlock.txt |  28 ------
 drivers/hwspinlock/Kconfig                         |  11 ---
 drivers/hwspinlock/Makefile                        |   1 -
 drivers/hwspinlock/sirf_hwspinlock.c               | 105 ---------------------
 4 files changed, 145 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/hwlock/sirf,hwspinlock.txt
 delete mode 100644 drivers/hwspinlock/sirf_hwspinlock.c

(limited to 'drivers')

diff --git a/Documentation/devicetree/bindings/hwlock/sirf,hwspinlock.txt b/Documentation/devicetree/bindings/hwlock/sirf,hwspinlock.txt
deleted file mode 100644
index 9bb1240a68e0..000000000000
--- a/Documentation/devicetree/bindings/hwlock/sirf,hwspinlock.txt
+++ /dev/null
@@ -1,28 +0,0 @@
-SIRF Hardware spinlock device Binding
------------------------------------------------
-
-Required properties :
-- compatible : shall contain only one of the following:
-	"sirf,hwspinlock"
-
-- reg : the register address of hwspinlock
-
-- #hwlock-cells : hwlock users only use the hwlock id to represent a specific
-	hwlock, so the number of cells should be <1> here.
-
-Please look at the generic hwlock binding for usage information for consumers,
-"Documentation/devicetree/bindings/hwlock/hwlock.txt"
-
-Example of hwlock provider:
-	hwlock {
-		compatible = "sirf,hwspinlock";
-		reg = <0x13240000 0x00010000>;
-		#hwlock-cells = <1>;
-	};
-
-Example of hwlock users:
-	node {
-		...
-		hwlocks = <&hwlock 2>;
-		...
-	};
diff --git a/drivers/hwspinlock/Kconfig b/drivers/hwspinlock/Kconfig
index 32cd26352f38..53e13476e831 100644
--- a/drivers/hwspinlock/Kconfig
+++ b/drivers/hwspinlock/Kconfig
@@ -28,17 +28,6 @@ config HWSPINLOCK_QCOM
 
 	  If unsure, say N.
 
-config HWSPINLOCK_SIRF
-	tristate "SIRF Hardware Spinlock device"
-	depends on ARCH_SIRF || COMPILE_TEST
-	help
-	  Say y here to support the SIRF Hardware Spinlock device, which
-	  provides a synchronisation mechanism for the various processors
-	  on the SoC.
-
-	  It's safe to say n here if you're not interested in SIRF hardware
-	  spinlock or just want a bare minimum kernel.
-
 config HWSPINLOCK_SPRD
 	tristate "SPRD Hardware Spinlock device"
 	depends on ARCH_SPRD || COMPILE_TEST
diff --git a/drivers/hwspinlock/Makefile b/drivers/hwspinlock/Makefile
index ed053e3f02be..1f8dd6f5814f 100644
--- a/drivers/hwspinlock/Makefile
+++ b/drivers/hwspinlock/Makefile
@@ -6,7 +6,6 @@
 obj-$(CONFIG_HWSPINLOCK)		+= hwspinlock_core.o
 obj-$(CONFIG_HWSPINLOCK_OMAP)		+= omap_hwspinlock.o
 obj-$(CONFIG_HWSPINLOCK_QCOM)		+= qcom_hwspinlock.o
-obj-$(CONFIG_HWSPINLOCK_SIRF)		+= sirf_hwspinlock.o
 obj-$(CONFIG_HWSPINLOCK_SPRD)		+= sprd_hwspinlock.o
 obj-$(CONFIG_HWSPINLOCK_STM32)		+= stm32_hwspinlock.o
 obj-$(CONFIG_HSEM_U8500)		+= u8500_hsem.o
diff --git a/drivers/hwspinlock/sirf_hwspinlock.c b/drivers/hwspinlock/sirf_hwspinlock.c
deleted file mode 100644
index a3f77120bad7..000000000000
--- a/drivers/hwspinlock/sirf_hwspinlock.c
+++ /dev/null
@@ -1,105 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * SIRF hardware spinlock driver
- *
- * Copyright (c) 2015 Cambridge Silicon Radio Limited, a CSR plc group company.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/hwspinlock.h>
-#include <linux/platform_device.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-
-#include "hwspinlock_internal.h"
-
-struct sirf_hwspinlock {
-	void __iomem *io_base;
-	struct hwspinlock_device bank;
-};
-
-/* Number of Hardware Spinlocks*/
-#define	HW_SPINLOCK_NUMBER	30
-
-/* Hardware spinlock register offsets */
-#define HW_SPINLOCK_BASE	0x404
-#define HW_SPINLOCK_OFFSET(x)	(HW_SPINLOCK_BASE + 0x4 * (x))
-
-static int sirf_hwspinlock_trylock(struct hwspinlock *lock)
-{
-	void __iomem *lock_addr = lock->priv;
-
-	/* attempt to acquire the lock by reading value == 1 from it */
-	return !!readl(lock_addr);
-}
-
-static void sirf_hwspinlock_unlock(struct hwspinlock *lock)
-{
-	void __iomem *lock_addr = lock->priv;
-
-	/* release the lock by writing 0 to it */
-	writel(0, lock_addr);
-}
-
-static const struct hwspinlock_ops sirf_hwspinlock_ops = {
-	.trylock = sirf_hwspinlock_trylock,
-	.unlock = sirf_hwspinlock_unlock,
-};
-
-static int sirf_hwspinlock_probe(struct platform_device *pdev)
-{
-	struct sirf_hwspinlock *hwspin;
-	struct hwspinlock *hwlock;
-	int idx;
-
-	if (!pdev->dev.of_node)
-		return -ENODEV;
-
-	hwspin = devm_kzalloc(&pdev->dev,
-			      struct_size(hwspin, bank.lock,
-					  HW_SPINLOCK_NUMBER),
-			      GFP_KERNEL);
-	if (!hwspin)
-		return -ENOMEM;
-
-	/* retrieve io base */
-	hwspin->io_base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(hwspin->io_base))
-		return PTR_ERR(hwspin->io_base);
-
-	for (idx = 0; idx < HW_SPINLOCK_NUMBER; idx++) {
-		hwlock = &hwspin->bank.lock[idx];
-		hwlock->priv = hwspin->io_base + HW_SPINLOCK_OFFSET(idx);
-	}
-
-	platform_set_drvdata(pdev, hwspin);
-
-	return devm_hwspin_lock_register(&pdev->dev, &hwspin->bank,
-					 &sirf_hwspinlock_ops, 0,
-					 HW_SPINLOCK_NUMBER);
-}
-
-static const struct of_device_id sirf_hwpinlock_ids[] = {
-	{ .compatible = "sirf,hwspinlock", },
-	{},
-};
-MODULE_DEVICE_TABLE(of, sirf_hwpinlock_ids);
-
-static struct platform_driver sirf_hwspinlock_driver = {
-	.probe = sirf_hwspinlock_probe,
-	.driver = {
-		.name = "atlas7_hwspinlock",
-		.of_match_table = sirf_hwpinlock_ids,
-	},
-};
-
-module_platform_driver(sirf_hwspinlock_driver);
-
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("SIRF Hardware spinlock driver");
-MODULE_AUTHOR("Wei Chen <wei.chen@csr.com>");
-- 
cgit v1.2.3


From 9af2a2a9c64ee68a5dc8271d54235609191f1cd1 Mon Sep 17 00:00:00 2001
From: Bjorn Andersson <bjorn.andersson@linaro.org>
Date: Thu, 11 Mar 2021 16:26:05 -0800
Subject: remoteproc: qcom_q6v5_mss: Provide errors for firmware-name parsing

Failing to read the "firmware-name" DT property without informing the
developer is annoying, add some helpful debug prints.

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210312002605.3273255-1-bjorn.andersson@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/qcom_q6v5_mss.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index 66106ba25ba3..15abfbba78d2 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -1661,8 +1661,10 @@ static int q6v5_probe(struct platform_device *pdev)
 	mba_image = desc->hexagon_mba_image;
 	ret = of_property_read_string_index(pdev->dev.of_node, "firmware-name",
 					    0, &mba_image);
-	if (ret < 0 && ret != -EINVAL)
+	if (ret < 0 && ret != -EINVAL) {
+		dev_err(&pdev->dev, "unable to read mba firmware-name\n");
 		return ret;
+	}
 
 	rproc = rproc_alloc(&pdev->dev, pdev->name, &q6v5_ops,
 			    mba_image, sizeof(*qproc));
@@ -1680,8 +1682,10 @@ static int q6v5_probe(struct platform_device *pdev)
 	qproc->hexagon_mdt_image = "modem.mdt";
 	ret = of_property_read_string_index(pdev->dev.of_node, "firmware-name",
 					    1, &qproc->hexagon_mdt_image);
-	if (ret < 0 && ret != -EINVAL)
+	if (ret < 0 && ret != -EINVAL) {
+		dev_err(&pdev->dev, "unable to read mpss firmware-name\n");
 		goto free_rproc;
+	}
 
 	platform_set_drvdata(pdev, qproc);
 
-- 
cgit v1.2.3


From 3d2ee78906af5f08d499d6aa3aa504406fa38106 Mon Sep 17 00:00:00 2001
From: Bjorn Andersson <bjorn.andersson@linaro.org>
Date: Fri, 12 Mar 2021 15:20:02 -0800
Subject: remoteproc: qcom_q6v5_mss: Validate p_filesz in ELF loader

Analog to the issue in the common mdt_loader code the MSS ELF loader
does not validate that p_filesz bytes will fit in the memory region and
that the loaded segments are not truncated. Fix this in the same way
as proposed for the mdt_loader.

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Fixes: 135b9e8d1cd8 ("remoteproc: qcom_q6v5_mss: Validate modem blob firmware size before load")
Link: https://lore.kernel.org/r/20210312232002.3466791-1-bjorn.andersson@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/qcom_q6v5_mss.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'drivers')

diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index 15abfbba78d2..423b31dfa574 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -1210,6 +1210,14 @@ static int q6v5_mpss_load(struct q6v5 *qproc)
 			goto release_firmware;
 		}
 
+		if (phdr->p_filesz > phdr->p_memsz) {
+			dev_err(qproc->dev,
+				"refusing to load segment %d with p_filesz > p_memsz\n",
+				i);
+			ret = -EINVAL;
+			goto release_firmware;
+		}
+
 		ptr = memremap(qproc->mpss_phys + offset, phdr->p_memsz, MEMREMAP_WC);
 		if (!ptr) {
 			dev_err(qproc->dev,
@@ -1241,6 +1249,16 @@ static int q6v5_mpss_load(struct q6v5 *qproc)
 				goto release_firmware;
 			}
 
+			if (seg_fw->size != phdr->p_filesz) {
+				dev_err(qproc->dev,
+					"failed to load segment %d from truncated file %s\n",
+					i, fw_name);
+				ret = -EINVAL;
+				release_firmware(seg_fw);
+				memunmap(ptr);
+				goto release_firmware;
+			}
+
 			release_firmware(seg_fw);
 		}
 
-- 
cgit v1.2.3


From 16324fc8def1c08a92261089aaf503aca3381aa6 Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Fri, 12 Mar 2021 09:24:37 -0700
Subject: remoteproc: Remove useless check in rproc_del()

Whether started at probe() time or thereafter from the command
line, a remote processor needs to be shut down before the final
cleanup phases can happen.  Otherwise the system may be left in
an unpredictable state where the remote processor is expecting
the remoteproc core to be providing services when in fact it
no longer exist.

Invariably calling rproc_shutdown() is fine since it will return
immediately if the remote processor has already been switched
off.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-2-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_core.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 5071cdbfc926..4c2e678732f5 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -2353,10 +2353,8 @@ int rproc_del(struct rproc *rproc)
 	if (!rproc)
 		return -EINVAL;
 
-	/* if rproc is marked always-on, rproc_add() booted it */
 	/* TODO: make sure this works with rproc->power > 1 */
-	if (rproc->auto_boot)
-		rproc_shutdown(rproc);
+	rproc_shutdown(rproc);
 
 	mutex_lock(&rproc->lock);
 	rproc->state = RPROC_DELETED;
-- 
cgit v1.2.3


From 6a6c4dc0e5de5dc4fec0ccda417c26f5814be380 Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Fri, 12 Mar 2021 09:24:38 -0700
Subject: remoteproc: Rename function rproc_actuate()

Rename function rproc_actuate() to rproc_attach().  That way it is
easy to understand that it does the opposite of rproc_detach().

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-3-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_core.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 4c2e678732f5..9127b2aa5424 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1422,7 +1422,7 @@ reset_table_ptr:
 	return ret;
 }
 
-static int rproc_attach(struct rproc *rproc)
+static int __rproc_attach(struct rproc *rproc)
 {
 	struct device *dev = &rproc->dev;
 	int ret;
@@ -1547,7 +1547,7 @@ disable_iommu:
  * Attach to remote processor - similar to rproc_fw_boot() but without
  * the steps that deal with the firmware image.
  */
-static int rproc_actuate(struct rproc *rproc)
+static int rproc_attach(struct rproc *rproc)
 {
 	struct device *dev = &rproc->dev;
 	int ret;
@@ -1587,7 +1587,7 @@ static int rproc_actuate(struct rproc *rproc)
 		goto clean_up_resources;
 	}
 
-	ret = rproc_attach(rproc);
+	ret = __rproc_attach(rproc);
 	if (ret)
 		goto clean_up_resources;
 
@@ -1808,7 +1808,7 @@ int rproc_boot(struct rproc *rproc)
 	if (rproc->state == RPROC_DETACHED) {
 		dev_info(dev, "attaching to %s\n", rproc->name);
 
-		ret = rproc_actuate(rproc);
+		ret = rproc_attach(rproc);
 	} else {
 		dev_info(dev, "powering up %s\n", rproc->name);
 
-- 
cgit v1.2.3


From 4196d18903f94090f0a223d65de25e3bf50a3d13 Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Fri, 12 Mar 2021 09:24:39 -0700
Subject: remoteproc: Add new RPROC_ATTACHED state

Add a new RPROC_ATTACHED state to take into account scenarios
where the remoteproc core needs to attach to a remote processor
that is booted by another entity.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-4-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_sysfs.c | 1 +
 include/linux/remoteproc.h            | 7 +++++--
 2 files changed, 6 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
index 6840dad931d5..26fd9ceecdb5 100644
--- a/drivers/remoteproc/remoteproc_sysfs.c
+++ b/drivers/remoteproc/remoteproc_sysfs.c
@@ -172,6 +172,7 @@ static const char * const rproc_state_string[] = {
 	[RPROC_RUNNING]		= "running",
 	[RPROC_CRASHED]		= "crashed",
 	[RPROC_DELETED]		= "deleted",
+	[RPROC_ATTACHED]	= "attached",
 	[RPROC_DETACHED]	= "detached",
 	[RPROC_LAST]		= "invalid",
 };
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 1b7d56c7a453..9193a8fb5b68 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -407,6 +407,8 @@ struct rproc_ops {
  * @RPROC_RUNNING:	device is up and running
  * @RPROC_CRASHED:	device has crashed; need to start recovery
  * @RPROC_DELETED:	device is deleted
+ * @RPROC_ATTACHED:	device has been booted by another entity and the core
+ *			has attached to it
  * @RPROC_DETACHED:	device has been booted by another entity and waiting
  *			for the core to attach to it
  * @RPROC_LAST:		just keep this one at the end
@@ -423,8 +425,9 @@ enum rproc_state {
 	RPROC_RUNNING	= 2,
 	RPROC_CRASHED	= 3,
 	RPROC_DELETED	= 4,
-	RPROC_DETACHED	= 5,
-	RPROC_LAST	= 6,
+	RPROC_ATTACHED	= 5,
+	RPROC_DETACHED	= 6,
+	RPROC_LAST	= 7,
 };
 
 /**
-- 
cgit v1.2.3


From 76f4c87587e2ff41e9b9867ffde2137f27ba39b9 Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Fri, 12 Mar 2021 09:24:40 -0700
Subject: remoteproc: Properly represent the attached state

There is a need to know when a remote processor has been attached
to rather than booted by the remoteproc core.  In order to avoid
manipulating two variables, i.e rproc::autonomous and
rproc::state, get rid of the former and simply use the newly
introduced RPROC_ATTACHED state.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-5-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_core.c  | 20 +-------------------
 drivers/remoteproc/remoteproc_sysfs.c |  5 +----
 include/linux/remoteproc.h            |  2 --
 3 files changed, 2 insertions(+), 25 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 9127b2aa5424..d828c01f4f8a 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1450,7 +1450,7 @@ static int __rproc_attach(struct rproc *rproc)
 		goto stop_rproc;
 	}
 
-	rproc->state = RPROC_RUNNING;
+	rproc->state = RPROC_ATTACHED;
 
 	dev_info(dev, "remote processor %s is now attached\n", rproc->name);
 
@@ -1665,14 +1665,6 @@ static int rproc_stop(struct rproc *rproc, bool crashed)
 
 	rproc->state = RPROC_OFFLINE;
 
-	/*
-	 * The remote processor has been stopped and is now offline, which means
-	 * that the next time it is brought back online the remoteproc core will
-	 * be responsible to load its firmware.  As such it is no longer
-	 * autonomous.
-	 */
-	rproc->autonomous = false;
-
 	dev_info(dev, "stopped remote processor %s\n", rproc->name);
 
 	return 0;
@@ -2083,16 +2075,6 @@ int rproc_add(struct rproc *rproc)
 	if (ret < 0)
 		return ret;
 
-	/*
-	 * Remind ourselves the remote processor has been attached to rather
-	 * than booted by the remoteproc core.  This is important because the
-	 * RPROC_DETACHED state will be lost as soon as the remote processor
-	 * has been attached to.  Used in firmware_show() and reset in
-	 * rproc_stop().
-	 */
-	if (rproc->state == RPROC_DETACHED)
-		rproc->autonomous = true;
-
 	/* if rproc is marked always-on, request it to boot */
 	if (rproc->auto_boot) {
 		ret = rproc_trigger_auto_boot(rproc);
diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
index 26fd9ceecdb5..4f58be1e13c1 100644
--- a/drivers/remoteproc/remoteproc_sysfs.c
+++ b/drivers/remoteproc/remoteproc_sysfs.c
@@ -138,11 +138,8 @@ static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
 	 * If the remote processor has been started by an external
 	 * entity we have no idea of what image it is running.  As such
 	 * simply display a generic string rather then rproc->firmware.
-	 *
-	 * Here we rely on the autonomous flag because a remote processor
-	 * may have been attached to and currently in a running state.
 	 */
-	if (rproc->autonomous)
+	if (rproc->state == RPROC_ATTACHED)
 		firmware = "unknown";
 
 	return sprintf(buf, "%s\n", firmware);
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 9193a8fb5b68..9e42e90cd9da 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -514,7 +514,6 @@ struct rproc_dump_segment {
  * @table_sz: size of @cached_table
  * @has_iommu: flag to indicate if remote processor is behind an MMU
  * @auto_boot: flag to indicate if remote processor should be auto-started
- * @autonomous: true if an external entity has booted the remote processor
  * @dump_segments: list of segments in the firmware
  * @nb_vdev: number of vdev currently handled by rproc
  * @char_dev: character device of the rproc
@@ -551,7 +550,6 @@ struct rproc {
 	size_t table_sz;
 	bool has_iommu;
 	bool auto_boot;
-	bool autonomous;
 	struct list_head dump_segments;
 	int nb_vdev;
 	u8 elf_class;
-- 
cgit v1.2.3


From 1a631382be1d22ddab0582dae3498b3d28e2e44a Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Fri, 12 Mar 2021 09:24:41 -0700
Subject: remoteproc: Add new get_loaded_rsc_table() to rproc_ops

Add a new get_loaded_rsc_table() operation in order to support
scenarios where the remoteproc core has booted a remote processor
and detaches from it.  When re-attaching to the remote processor,
the core needs to know where the resource table has been placed
in memory.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-6-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_core.c     | 32 ++++++++++++++++++++++++++++++++
 drivers/remoteproc/remoteproc_internal.h | 10 ++++++++++
 include/linux/remoteproc.h               |  6 +++++-
 3 files changed, 47 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index d828c01f4f8a..c7e1cf1b6f66 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1543,6 +1543,32 @@ disable_iommu:
 	return ret;
 }
 
+static int rproc_set_rsc_table(struct rproc *rproc)
+{
+	struct resource_table *table_ptr;
+	struct device *dev = &rproc->dev;
+	size_t table_sz;
+	int ret;
+
+	table_ptr = rproc_get_loaded_rsc_table(rproc, &table_sz);
+	if (!table_ptr) {
+		/* Not having a resource table is acceptable */
+		return 0;
+	}
+
+	if (IS_ERR(table_ptr)) {
+		ret = PTR_ERR(table_ptr);
+		dev_err(dev, "can't load resource table: %d\n", ret);
+		return ret;
+	}
+
+	rproc->cached_table = NULL;
+	rproc->table_ptr = table_ptr;
+	rproc->table_sz = table_sz;
+
+	return 0;
+}
+
 /*
  * Attach to remote processor - similar to rproc_fw_boot() but without
  * the steps that deal with the firmware image.
@@ -1562,6 +1588,12 @@ static int rproc_attach(struct rproc *rproc)
 		return ret;
 	}
 
+	ret = rproc_set_rsc_table(rproc);
+	if (ret) {
+		dev_err(dev, "can't load resource table: %d\n", ret);
+		goto disable_iommu;
+	}
+
 	/* reset max_notifyid */
 	rproc->max_notifyid = -1;
 
diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
index 9ea37aa687d2..a328e634b1de 100644
--- a/drivers/remoteproc/remoteproc_internal.h
+++ b/drivers/remoteproc/remoteproc_internal.h
@@ -177,6 +177,16 @@ struct resource_table *rproc_find_loaded_rsc_table(struct rproc *rproc,
 	return NULL;
 }
 
+static inline
+struct resource_table *rproc_get_loaded_rsc_table(struct rproc *rproc,
+						  size_t *size)
+{
+	if (rproc->ops->get_loaded_rsc_table)
+		return rproc->ops->get_loaded_rsc_table(rproc, size);
+
+	return NULL;
+}
+
 static inline
 bool rproc_u64_fit_in_size_t(u64 val)
 {
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 9e42e90cd9da..eee338177a3d 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -370,7 +370,9 @@ enum rsc_handling_status {
  * RSC_HANDLED if resource was handled, RSC_IGNORED if not handled and a
  * negative value on error
  * @load_rsc_table:	load resource table from firmware image
- * @find_loaded_rsc_table: find the loaded resouce table
+ * @find_loaded_rsc_table: find the loaded resource table from firmware image
+ * @get_loaded_rsc_table: get resource table installed in memory
+ *			  by external entity
  * @load:		load firmware to memory, where the remote processor
  *			expects to find it
  * @sanity_check:	sanity check the fw image
@@ -392,6 +394,8 @@ struct rproc_ops {
 			  int offset, int avail);
 	struct resource_table *(*find_loaded_rsc_table)(
 				struct rproc *rproc, const struct firmware *fw);
+	struct resource_table *(*get_loaded_rsc_table)(
+				struct rproc *rproc, size_t *size);
 	int (*load)(struct rproc *rproc, const struct firmware *fw);
 	int (*sanity_check)(struct rproc *rproc, const struct firmware *fw);
 	u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw);
-- 
cgit v1.2.3


From 8a471396d21ca499d89d4071b2b670258f009ffa Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Fri, 12 Mar 2021 09:24:42 -0700
Subject: remoteproc: stm32: Move resource table setup to rproc_ops

Move the setting of the resource table installed by an external
entity to rproc_ops::get_loaded_rsc_table().  This is to support
scenarios where a remote processor has been attached to but is
detached at a later stage.  To re-attach the remote processor,
the address of the resource table needs to be available
at a later time than the platform driver's probe() function.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-7-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/stm32_rproc.c | 141 +++++++++++++++++++--------------------
 1 file changed, 68 insertions(+), 73 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
index ccb3c14a0023..f647e565014b 100644
--- a/drivers/remoteproc/stm32_rproc.c
+++ b/drivers/remoteproc/stm32_rproc.c
@@ -546,6 +546,73 @@ static void stm32_rproc_kick(struct rproc *rproc, int vqid)
 	}
 }
 
+static int stm32_rproc_da_to_pa(struct rproc *rproc,
+				u64 da, phys_addr_t *pa)
+{
+	struct stm32_rproc *ddata = rproc->priv;
+	struct device *dev = rproc->dev.parent;
+	struct stm32_rproc_mem *p_mem;
+	unsigned int i;
+
+	for (i = 0; i < ddata->nb_rmems; i++) {
+		p_mem = &ddata->rmems[i];
+
+		if (da < p_mem->dev_addr ||
+		    da >= p_mem->dev_addr + p_mem->size)
+			continue;
+
+		*pa = da - p_mem->dev_addr + p_mem->bus_addr;
+		dev_dbg(dev, "da %llx to pa %#x\n", da, *pa);
+
+		return 0;
+	}
+
+	dev_err(dev, "can't translate da %llx\n", da);
+
+	return -EINVAL;
+}
+
+static struct resource_table *
+stm32_rproc_get_loaded_rsc_table(struct rproc *rproc, size_t *table_sz)
+{
+	struct stm32_rproc *ddata = rproc->priv;
+	struct device *dev = rproc->dev.parent;
+	phys_addr_t rsc_pa;
+	u32 rsc_da;
+	int err;
+
+	/* The resource table has already been mapped, nothing to do */
+	if (ddata->rsc_va)
+		goto done;
+
+	err = regmap_read(ddata->rsctbl.map, ddata->rsctbl.reg, &rsc_da);
+	if (err) {
+		dev_err(dev, "failed to read rsc tbl addr\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	if (!rsc_da)
+		/* no rsc table */
+		return ERR_PTR(-ENOENT);
+
+	err = stm32_rproc_da_to_pa(rproc, rsc_da, &rsc_pa);
+	if (err)
+		return ERR_PTR(err);
+
+	ddata->rsc_va = devm_ioremap_wc(dev, rsc_pa, RSC_TBL_SIZE);
+	if (IS_ERR_OR_NULL(ddata->rsc_va)) {
+		dev_err(dev, "Unable to map memory region: %pa+%zx\n",
+			&rsc_pa, RSC_TBL_SIZE);
+		ddata->rsc_va = NULL;
+		return ERR_PTR(-ENOMEM);
+	}
+
+done:
+	/* Assuming the resource table fits in 1kB is fair */
+	*table_sz = RSC_TBL_SIZE;
+	return (struct resource_table *)ddata->rsc_va;
+}
+
 static const struct rproc_ops st_rproc_ops = {
 	.start		= stm32_rproc_start,
 	.stop		= stm32_rproc_stop,
@@ -554,6 +621,7 @@ static const struct rproc_ops st_rproc_ops = {
 	.load		= rproc_elf_load_segments,
 	.parse_fw	= stm32_rproc_parse_fw,
 	.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
+	.get_loaded_rsc_table = stm32_rproc_get_loaded_rsc_table,
 	.sanity_check	= rproc_elf_sanity_check,
 	.get_boot_addr	= rproc_elf_get_boot_addr,
 };
@@ -695,75 +763,6 @@ static int stm32_rproc_get_m4_status(struct stm32_rproc *ddata,
 	return regmap_read(ddata->m4_state.map, ddata->m4_state.reg, state);
 }
 
-static int stm32_rproc_da_to_pa(struct platform_device *pdev,
-				struct stm32_rproc *ddata,
-				u64 da, phys_addr_t *pa)
-{
-	struct device *dev = &pdev->dev;
-	struct stm32_rproc_mem *p_mem;
-	unsigned int i;
-
-	for (i = 0; i < ddata->nb_rmems; i++) {
-		p_mem = &ddata->rmems[i];
-
-		if (da < p_mem->dev_addr ||
-		    da >= p_mem->dev_addr + p_mem->size)
-			continue;
-
-		*pa = da - p_mem->dev_addr + p_mem->bus_addr;
-		dev_dbg(dev, "da %llx to pa %#x\n", da, *pa);
-
-		return 0;
-	}
-
-	dev_err(dev, "can't translate da %llx\n", da);
-
-	return -EINVAL;
-}
-
-static int stm32_rproc_get_loaded_rsc_table(struct platform_device *pdev,
-					    struct rproc *rproc,
-					    struct stm32_rproc *ddata)
-{
-	struct device *dev = &pdev->dev;
-	phys_addr_t rsc_pa;
-	u32 rsc_da;
-	int err;
-
-	err = regmap_read(ddata->rsctbl.map, ddata->rsctbl.reg, &rsc_da);
-	if (err) {
-		dev_err(dev, "failed to read rsc tbl addr\n");
-		return err;
-	}
-
-	if (!rsc_da)
-		/* no rsc table */
-		return 0;
-
-	err = stm32_rproc_da_to_pa(pdev, ddata, rsc_da, &rsc_pa);
-	if (err)
-		return err;
-
-	ddata->rsc_va = devm_ioremap_wc(dev, rsc_pa, RSC_TBL_SIZE);
-	if (IS_ERR_OR_NULL(ddata->rsc_va)) {
-		dev_err(dev, "Unable to map memory region: %pa+%zx\n",
-			&rsc_pa, RSC_TBL_SIZE);
-		ddata->rsc_va = NULL;
-		return -ENOMEM;
-	}
-
-	/*
-	 * The resource table is already loaded in device memory, no need
-	 * to work with a cached table.
-	 */
-	rproc->cached_table = NULL;
-	/* Assuming the resource table fits in 1kB is fair */
-	rproc->table_sz = RSC_TBL_SIZE;
-	rproc->table_ptr = (struct resource_table *)ddata->rsc_va;
-
-	return 0;
-}
-
 static int stm32_rproc_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -803,10 +802,6 @@ static int stm32_rproc_probe(struct platform_device *pdev)
 		ret = stm32_rproc_parse_memory_regions(rproc);
 		if (ret)
 			goto free_resources;
-
-		ret = stm32_rproc_get_loaded_rsc_table(pdev, rproc, ddata);
-		if (ret)
-			goto free_resources;
 	}
 
 	rproc->has_iommu = false;
-- 
cgit v1.2.3


From 6e20a05104e55dc0e4899db8110013d521d20a6e Mon Sep 17 00:00:00 2001
From: Arnaud POULIQUEN <arnaud.pouliquen@foss.st.com>
Date: Fri, 12 Mar 2021 09:24:43 -0700
Subject: remoteproc: stm32: Move memory parsing to rproc_ops

Some actions such as memory resources reallocation are needed when
trying to reattach a co-processor. Use the prepare() operation for
these actions.

Co-developed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Arnaud POULIQUEN <arnaud.pouliquen@foss.st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-8-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_core.c | 14 ++++++++++++--
 drivers/remoteproc/stm32_rproc.c     | 27 ++++++---------------------
 2 files changed, 18 insertions(+), 23 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index c7e1cf1b6f66..de670f4f592c 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1588,10 +1588,17 @@ static int rproc_attach(struct rproc *rproc)
 		return ret;
 	}
 
+	/* Do anything that is needed to boot the remote processor */
+	ret = rproc_prepare_device(rproc);
+	if (ret) {
+		dev_err(dev, "can't prepare rproc %s: %d\n", rproc->name, ret);
+		goto disable_iommu;
+	}
+
 	ret = rproc_set_rsc_table(rproc);
 	if (ret) {
 		dev_err(dev, "can't load resource table: %d\n", ret);
-		goto disable_iommu;
+		goto unprepare_device;
 	}
 
 	/* reset max_notifyid */
@@ -1608,7 +1615,7 @@ static int rproc_attach(struct rproc *rproc)
 	ret = rproc_handle_resources(rproc, rproc_loading_handlers);
 	if (ret) {
 		dev_err(dev, "Failed to process resources: %d\n", ret);
-		goto disable_iommu;
+		goto unprepare_device;
 	}
 
 	/* Allocate carveout resources associated to rproc */
@@ -1627,6 +1634,9 @@ static int rproc_attach(struct rproc *rproc)
 
 clean_up_resources:
 	rproc_resource_cleanup(rproc);
+unprepare_device:
+	/* release HW resources if needed */
+	rproc_unprepare_device(rproc);
 disable_iommu:
 	rproc_disable_iommu(rproc);
 	return ret;
diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
index f647e565014b..3d45f51de4d0 100644
--- a/drivers/remoteproc/stm32_rproc.c
+++ b/drivers/remoteproc/stm32_rproc.c
@@ -207,16 +207,7 @@ static int stm32_rproc_mbox_idx(struct rproc *rproc, const unsigned char *name)
 	return -EINVAL;
 }
 
-static int stm32_rproc_elf_load_rsc_table(struct rproc *rproc,
-					  const struct firmware *fw)
-{
-	if (rproc_elf_load_rsc_table(rproc, fw))
-		dev_warn(&rproc->dev, "no resource table found for this firmware\n");
-
-	return 0;
-}
-
-static int stm32_rproc_parse_memory_regions(struct rproc *rproc)
+static int stm32_rproc_prepare(struct rproc *rproc)
 {
 	struct device *dev = rproc->dev.parent;
 	struct device_node *np = dev->of_node;
@@ -274,12 +265,10 @@ static int stm32_rproc_parse_memory_regions(struct rproc *rproc)
 
 static int stm32_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
 {
-	int ret = stm32_rproc_parse_memory_regions(rproc);
-
-	if (ret)
-		return ret;
+	if (rproc_elf_load_rsc_table(rproc, fw))
+		dev_warn(&rproc->dev, "no resource table found for this firmware\n");
 
-	return stm32_rproc_elf_load_rsc_table(rproc, fw);
+	return 0;
 }
 
 static irqreturn_t stm32_rproc_wdg(int irq, void *data)
@@ -614,6 +603,7 @@ done:
 }
 
 static const struct rproc_ops st_rproc_ops = {
+	.prepare	= stm32_rproc_prepare,
 	.start		= stm32_rproc_start,
 	.stop		= stm32_rproc_stop,
 	.attach		= stm32_rproc_attach,
@@ -796,14 +786,9 @@ static int stm32_rproc_probe(struct platform_device *pdev)
 	if (ret)
 		goto free_rproc;
 
-	if (state == M4_STATE_CRUN) {
+	if (state == M4_STATE_CRUN)
 		rproc->state = RPROC_DETACHED;
 
-		ret = stm32_rproc_parse_memory_regions(rproc);
-		if (ret)
-			goto free_resources;
-	}
-
 	rproc->has_iommu = false;
 	ddata->workqueue = create_workqueue(dev_name(dev));
 	if (!ddata->workqueue) {
-- 
cgit v1.2.3


From 6070203fe43335a02b7fd103bae582095411adc5 Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Fri, 12 Mar 2021 09:24:45 -0700
Subject: remoteproc: Introduce function __rproc_detach()

Introduce function __rproc_detach() to perform the same kind of
operation as rproc_stop(), but instead of switching off the
remote processor using rproc->ops->stop(), it uses
rproc->ops->detach().  That way it is possible for the core
to release the resources associated with a remote processor while
the latter is kept operating.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-10-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_core.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index de670f4f592c..23e9040386c2 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1712,6 +1712,36 @@ static int rproc_stop(struct rproc *rproc, bool crashed)
 	return 0;
 }
 
+/*
+ * __rproc_detach(): Does the opposite of __rproc_attach()
+ */
+static int __maybe_unused __rproc_detach(struct rproc *rproc)
+{
+	struct device *dev = &rproc->dev;
+	int ret;
+
+	/* No need to continue if a detach() operation has not been provided */
+	if (!rproc->ops->detach)
+		return -EINVAL;
+
+	/* Stop any subdevices for the remote processor */
+	rproc_stop_subdevices(rproc, false);
+
+	/* Tell the remote processor the core isn't available anymore */
+	ret = rproc->ops->detach(rproc);
+	if (ret) {
+		dev_err(dev, "can't detach from rproc: %d\n", ret);
+		return ret;
+	}
+
+	rproc_unprepare_subdevices(rproc);
+
+	rproc->state = RPROC_DETACHED;
+
+	dev_info(dev, "detached remote processor %s\n", rproc->name);
+
+	return 0;
+}
 
 /**
  * rproc_trigger_recovery() - recover a remoteproc
-- 
cgit v1.2.3


From d3962a397885518a85d2dc6b0c51e6594f71c30f Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Fri, 12 Mar 2021 09:24:46 -0700
Subject: remoteproc: Introduce function rproc_detach()

Introduce function rproc_detach() to enable the remoteproc
core to release the resources associated with a remote processor
without stopping its operation.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-11-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_core.c | 58 +++++++++++++++++++++++++++++++++++-
 include/linux/remoteproc.h           |  1 +
 2 files changed, 58 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 23e9040386c2..78a36a3723ec 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1715,7 +1715,7 @@ static int rproc_stop(struct rproc *rproc, bool crashed)
 /*
  * __rproc_detach(): Does the opposite of __rproc_attach()
  */
-static int __maybe_unused __rproc_detach(struct rproc *rproc)
+static int __rproc_detach(struct rproc *rproc)
 {
 	struct device *dev = &rproc->dev;
 	int ret;
@@ -1954,6 +1954,62 @@ out:
 }
 EXPORT_SYMBOL(rproc_shutdown);
 
+/**
+ * rproc_detach() - Detach the remote processor from the
+ * remoteproc core
+ *
+ * @rproc: the remote processor
+ *
+ * Detach a remote processor (previously attached to with rproc_attach()).
+ *
+ * In case @rproc is still being used by an additional user(s), then
+ * this function will just decrement the power refcount and exit,
+ * without disconnecting the device.
+ *
+ * Function rproc_detach() calls __rproc_detach() in order to let a remote
+ * processor know that services provided by the application processor are
+ * no longer available.  From there it should be possible to remove the
+ * platform driver and even power cycle the application processor (if the HW
+ * supports it) without needing to switch off the remote processor.
+ */
+int rproc_detach(struct rproc *rproc)
+{
+	struct device *dev = &rproc->dev;
+	int ret;
+
+	ret = mutex_lock_interruptible(&rproc->lock);
+	if (ret) {
+		dev_err(dev, "can't lock rproc %s: %d\n", rproc->name, ret);
+		return ret;
+	}
+
+	/* if the remote proc is still needed, bail out */
+	if (!atomic_dec_and_test(&rproc->power)) {
+		ret = 0;
+		goto out;
+	}
+
+	ret = __rproc_detach(rproc);
+	if (ret) {
+		atomic_inc(&rproc->power);
+		goto out;
+	}
+
+	/* clean up all acquired resources */
+	rproc_resource_cleanup(rproc);
+
+	/* release HW resources if needed */
+	rproc_unprepare_device(rproc);
+
+	rproc_disable_iommu(rproc);
+
+	rproc->table_ptr = NULL;
+out:
+	mutex_unlock(&rproc->lock);
+	return ret;
+}
+EXPORT_SYMBOL(rproc_detach);
+
 /**
  * rproc_get_by_phandle() - find a remote processor by phandle
  * @phandle: phandle to the rproc
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 2f1f0fbc3994..fc2cca600423 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -664,6 +664,7 @@ rproc_of_resm_mem_entry_init(struct device *dev, u32 of_resm_idx, size_t len,
 
 int rproc_boot(struct rproc *rproc);
 void rproc_shutdown(struct rproc *rproc);
+int rproc_detach(struct rproc *rproc);
 int rproc_set_firmware(struct rproc *rproc, const char *fw_name);
 void rproc_report_crash(struct rproc *rproc, enum rproc_crash_type type);
 void rproc_coredump_using_sections(struct rproc *rproc);
-- 
cgit v1.2.3


From 9dc9507f1880fb6225e3e058cb5219b152cbf198 Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Fri, 12 Mar 2021 09:24:47 -0700
Subject: remoteproc: Properly deal with the resource table when detaching

If it is possible to detach the remote processor, keep an untouched
copy of the resource table.  That way we can start from the same
resource table without having to worry about original values or what
elements the startup code has changed when re-attaching to the remote
processor.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-12-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_core.c | 81 ++++++++++++++++++++++++++++++++++++
 include/linux/remoteproc.h           |  3 ++
 2 files changed, 84 insertions(+)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 78a36a3723ec..57c851d22ba6 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1562,6 +1562,24 @@ static int rproc_set_rsc_table(struct rproc *rproc)
 		return ret;
 	}
 
+	/*
+	 * If it is possible to detach the remote processor, keep an untouched
+	 * copy of the resource table.  That way we can start fresh again when
+	 * the remote processor is re-attached, that is:
+	 *
+	 *      DETACHED -> ATTACHED -> DETACHED -> ATTACHED
+	 *
+	 * Free'd in rproc_reset_rsc_table_on_detach() and
+	 * rproc_reset_rsc_table_on_stop().
+	 */
+	if (rproc->ops->detach) {
+		rproc->clean_table = kmemdup(table_ptr, table_sz, GFP_KERNEL);
+		if (!rproc->clean_table)
+			return -ENOMEM;
+	} else {
+		rproc->clean_table = NULL;
+	}
+
 	rproc->cached_table = NULL;
 	rproc->table_ptr = table_ptr;
 	rproc->table_sz = table_sz;
@@ -1569,6 +1587,59 @@ static int rproc_set_rsc_table(struct rproc *rproc)
 	return 0;
 }
 
+static int rproc_reset_rsc_table_on_detach(struct rproc *rproc)
+{
+	struct resource_table *table_ptr;
+
+	/* A resource table was never retrieved, nothing to do here */
+	if (!rproc->table_ptr)
+		return 0;
+
+	/*
+	 * If we made it to this point a clean_table _must_ have been
+	 * allocated in rproc_set_rsc_table().  If one isn't present
+	 * something went really wrong and we must complain.
+	 */
+	if (WARN_ON(!rproc->clean_table))
+		return -EINVAL;
+
+	/* Remember where the external entity installed the resource table */
+	table_ptr = rproc->table_ptr;
+
+	/*
+	 * If we made it here the remote processor was started by another
+	 * entity and a cache table doesn't exist.  As such make a copy of
+	 * the resource table currently used by the remote processor and
+	 * use that for the rest of the shutdown process.  The memory
+	 * allocated here is free'd in rproc_detach().
+	 */
+	rproc->cached_table = kmemdup(rproc->table_ptr,
+				      rproc->table_sz, GFP_KERNEL);
+	if (!rproc->cached_table)
+		return -ENOMEM;
+
+	/*
+	 * Use a copy of the resource table for the remainder of the
+	 * shutdown process.
+	 */
+	rproc->table_ptr = rproc->cached_table;
+
+	/*
+	 * Reset the memory area where the firmware loaded the resource table
+	 * to its original value.  That way when we re-attach the remote
+	 * processor the resource table is clean and ready to be used again.
+	 */
+	memcpy(table_ptr, rproc->clean_table, rproc->table_sz);
+
+	/*
+	 * The clean resource table is no longer needed.  Allocated in
+	 * rproc_set_rsc_table().
+	 */
+	kfree(rproc->clean_table);
+
+	return 0;
+}
+
 /*
  * Attach to remote processor - similar to rproc_fw_boot() but without
  * the steps that deal with the firmware image.
@@ -1727,6 +1798,13 @@ static int __rproc_detach(struct rproc *rproc)
 	/* Stop any subdevices for the remote processor */
 	rproc_stop_subdevices(rproc, false);
 
+	/* the installed resource table is no longer accessible */
+	ret = rproc_reset_rsc_table_on_detach(rproc);
+	if (ret) {
+		dev_err(dev, "can't reset resource table: %d\n", ret);
+		return ret;
+	}
+
 	/* Tell the remote processor the core isn't available anymore */
 	ret = rproc->ops->detach(rproc);
 	if (ret) {
@@ -2003,6 +2081,9 @@ int rproc_detach(struct rproc *rproc)
 
 	rproc_disable_iommu(rproc);
 
+	/* Free the copy of the resource table */
+	kfree(rproc->cached_table);
+	rproc->cached_table = NULL;
 	rproc->table_ptr = NULL;
 out:
 	mutex_unlock(&rproc->lock);
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index fc2cca600423..8b795b544f75 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -516,6 +516,8 @@ struct rproc_dump_segment {
  * @recovery_disabled: flag that state if recovery was disabled
  * @max_notifyid: largest allocated notify id.
  * @table_ptr: pointer to the resource table in effect
+ * @clean_table: copy of the resource table without modifications.  Used
+ *		 when a remote processor is attached or detached from the core
  * @cached_table: copy of the resource table
  * @table_sz: size of @cached_table
  * @has_iommu: flag to indicate if remote processor is behind an MMU
@@ -552,6 +554,7 @@ struct rproc {
 	bool recovery_disabled;
 	int max_notifyid;
 	struct resource_table *table_ptr;
+	struct resource_table *clean_table;
 	struct resource_table *cached_table;
 	size_t table_sz;
 	bool has_iommu;
-- 
cgit v1.2.3


From 8088dd4d9316964901b13df09a20ee0f917f414d Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Fri, 12 Mar 2021 09:24:48 -0700
Subject: remoteproc: Properly deal with the resource table when stopping

When a remote processor that was attached to is stopped, special care
must be taken to make sure the shutdown process is similar to what
it would be had it been started by the remoteproc core.

This patch takes care of that by making a copy of the resource
table currently used by the remote processor.  From that point on
the copy is used, as if the remote processor had been started by
the remoteproc core.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-13-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_core.c | 48 +++++++++++++++++++++++++++++++++++-
 1 file changed, 47 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 57c851d22ba6..163fad5b95a1 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1640,6 +1640,47 @@ static int rproc_reset_rsc_table_on_detach(struct rproc *rproc)
 	return 0;
 }
 
+static int rproc_reset_rsc_table_on_stop(struct rproc *rproc)
+{
+	/* A resource table was never retrieved, nothing to do here */
+	if (!rproc->table_ptr)
+		return 0;
+
+	/*
+	 * If a cache table exists the remote processor was started by
+	 * the remoteproc core.  That cache table should be used for
+	 * the rest of the shutdown process.
+	 */
+	if (rproc->cached_table)
+		goto out;
+
+	/*
+	 * If we made it here the remote processor was started by another
+	 * entity and a cache table doesn't exist.  As such make a copy of
+	 * the resource table currently used by the remote processor and
+	 * use that for the rest of the shutdown process.  The memory
+	 * allocated here is free'd in rproc_shutdown().
+	 */
+	rproc->cached_table = kmemdup(rproc->table_ptr,
+				      rproc->table_sz, GFP_KERNEL);
+	if (!rproc->cached_table)
+		return -ENOMEM;
+
+	/*
+	 * Since the remote processor is being switched off the clean table
+	 * won't be needed.  Allocated in rproc_set_rsc_table().
+	 */
+	kfree(rproc->clean_table);
+
+out:
+	/*
+	 * Use a copy of the resource table for the remainder of the
+	 * shutdown process.
+	 */
+	rproc->table_ptr = rproc->cached_table;
+	return 0;
+}
+
 /*
  * Attach to remote processor - similar to rproc_fw_boot() but without
  * the steps that deal with the firmware image.
@@ -1765,7 +1806,12 @@ static int rproc_stop(struct rproc *rproc, bool crashed)
 	rproc_stop_subdevices(rproc, crashed);
 
 	/* the installed resource table is no longer accessible */
-	rproc->table_ptr = rproc->cached_table;
+	ret = rproc_reset_rsc_table_on_stop(rproc);
+	if (ret) {
+		dev_err(dev, "can't reset resource table: %d\n", ret);
+		return ret;
+	}
+
 
 	/* power off the remote processor */
 	ret = rproc->ops->stop(rproc);
-- 
cgit v1.2.3


From 800dad0025ecb9ca8c885414cab070f8cc40e81e Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Fri, 12 Mar 2021 09:24:49 -0700
Subject: remoteproc: Properly deal with a kernel panic when attached

The panic handler operation of registered remote processors
should also be called when remote processors have been
attached to.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-14-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_core.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 163fad5b95a1..4cf6ef7e15b5 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -2733,7 +2733,11 @@ static int rproc_panic_handler(struct notifier_block *nb, unsigned long event,
 
 	rcu_read_lock();
 	list_for_each_entry_rcu(rproc, &rproc_list, node) {
-		if (!rproc->ops->panic || rproc->state != RPROC_RUNNING)
+		if (!rproc->ops->panic)
+			continue;
+
+		if (rproc->state != RPROC_RUNNING &&
+		    rproc->state != RPROC_ATTACHED)
 			continue;
 
 		d = rproc->ops->panic(rproc);
-- 
cgit v1.2.3


From 83d4e6712c3b1a7dd5b43251737ea3d7d0a460f4 Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Fri, 12 Mar 2021 09:24:50 -0700
Subject: remoteproc: Properly deal with a start request when attached

This patch takes into account scenarios where a remote processor
has been attached to when receiving a "start" command from sysfs.

As with the case with the running state, the command can't be
carried out if the remote processor is already in operation.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-15-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_cdev.c  | 3 ++-
 drivers/remoteproc/remoteproc_sysfs.c | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_cdev.c b/drivers/remoteproc/remoteproc_cdev.c
index b19ea3057bde..b2cee9afb41b 100644
--- a/drivers/remoteproc/remoteproc_cdev.c
+++ b/drivers/remoteproc/remoteproc_cdev.c
@@ -32,7 +32,8 @@ static ssize_t rproc_cdev_write(struct file *filp, const char __user *buf, size_
 		return -EFAULT;
 
 	if (!strncmp(cmd, "start", len)) {
-		if (rproc->state == RPROC_RUNNING)
+		if (rproc->state == RPROC_RUNNING ||
+		    rproc->state == RPROC_ATTACHED)
 			return -EBUSY;
 
 		ret = rproc_boot(rproc);
diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
index 4f58be1e13c1..bbfa238e4707 100644
--- a/drivers/remoteproc/remoteproc_sysfs.c
+++ b/drivers/remoteproc/remoteproc_sysfs.c
@@ -194,7 +194,8 @@ static ssize_t state_store(struct device *dev,
 	int ret = 0;
 
 	if (sysfs_streq(buf, "start")) {
-		if (rproc->state == RPROC_RUNNING)
+		if (rproc->state == RPROC_RUNNING ||
+		    rproc->state == RPROC_ATTACHED)
 			return -EBUSY;
 
 		ret = rproc_boot(rproc);
-- 
cgit v1.2.3


From d2008a96833082713094ba8a545141be1b01b266 Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Fri, 12 Mar 2021 09:24:51 -0700
Subject: remoteproc: Properly deal with a stop request when attached

Allow a remote processor that was started by another entity to be
switched off by the remoteproc core.  For that to happen a
rproc::ops::stop() operation needs to be available.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-16-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_cdev.c  | 3 ++-
 drivers/remoteproc/remoteproc_core.c  | 4 ++++
 drivers/remoteproc/remoteproc_sysfs.c | 3 ++-
 3 files changed, 8 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_cdev.c b/drivers/remoteproc/remoteproc_cdev.c
index b2cee9afb41b..0249d8f6c3f8 100644
--- a/drivers/remoteproc/remoteproc_cdev.c
+++ b/drivers/remoteproc/remoteproc_cdev.c
@@ -38,7 +38,8 @@ static ssize_t rproc_cdev_write(struct file *filp, const char __user *buf, size_
 
 		ret = rproc_boot(rproc);
 	} else if (!strncmp(cmd, "stop", len)) {
-		if (rproc->state != RPROC_RUNNING)
+		if (rproc->state != RPROC_RUNNING &&
+		    rproc->state != RPROC_ATTACHED)
 			return -EINVAL;
 
 		rproc_shutdown(rproc);
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 4cf6ef7e15b5..626a6b90fba2 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1802,6 +1802,10 @@ static int rproc_stop(struct rproc *rproc, bool crashed)
 	struct device *dev = &rproc->dev;
 	int ret;
 
+	/* No need to continue if a stop() operation has not been provided */
+	if (!rproc->ops->stop)
+		return -EINVAL;
+
 	/* Stop any subdevices for the remote processor */
 	rproc_stop_subdevices(rproc, crashed);
 
diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
index bbfa238e4707..23c0dc1ddc34 100644
--- a/drivers/remoteproc/remoteproc_sysfs.c
+++ b/drivers/remoteproc/remoteproc_sysfs.c
@@ -202,7 +202,8 @@ static ssize_t state_store(struct device *dev,
 		if (ret)
 			dev_err(&rproc->dev, "Boot failed: %d\n", ret);
 	} else if (sysfs_streq(buf, "stop")) {
-		if (rproc->state != RPROC_RUNNING)
+		if (rproc->state != RPROC_RUNNING &&
+		    rproc->state != RPROC_ATTACHED)
 			return -EINVAL;
 
 		rproc_shutdown(rproc);
-- 
cgit v1.2.3


From 5daaeb5f07ed0681b734864dde58dcadab115963 Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Fri, 12 Mar 2021 09:24:52 -0700
Subject: remoteproc: Properly deal with a detach request when attached

This patch introduces the capability to detach a remote processor
that has been attached to by the remoteproc core.  For that to happen
a rproc::ops::detach() operation needs to be available.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-17-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_cdev.c  | 5 +++++
 drivers/remoteproc/remoteproc_sysfs.c | 5 +++++
 2 files changed, 10 insertions(+)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_cdev.c b/drivers/remoteproc/remoteproc_cdev.c
index 0249d8f6c3f8..2db494816d5f 100644
--- a/drivers/remoteproc/remoteproc_cdev.c
+++ b/drivers/remoteproc/remoteproc_cdev.c
@@ -43,6 +43,11 @@ static ssize_t rproc_cdev_write(struct file *filp, const char __user *buf, size_
 			return -EINVAL;
 
 		rproc_shutdown(rproc);
+	} else if (!strncmp(cmd, "detach", len)) {
+		if (rproc->state != RPROC_ATTACHED)
+			return -EINVAL;
+
+		ret = rproc_detach(rproc);
 	} else {
 		dev_err(&rproc->dev, "Unrecognized option\n");
 		ret = -EINVAL;
diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
index 23c0dc1ddc34..ea8b89f97d7b 100644
--- a/drivers/remoteproc/remoteproc_sysfs.c
+++ b/drivers/remoteproc/remoteproc_sysfs.c
@@ -207,6 +207,11 @@ static ssize_t state_store(struct device *dev,
 			return -EINVAL;
 
 		rproc_shutdown(rproc);
+	} else if (sysfs_streq(buf, "detach")) {
+		if (rproc->state != RPROC_ATTACHED)
+			return -EINVAL;
+
+		ret = rproc_detach(rproc);
 	} else {
 		dev_err(&rproc->dev, "Unrecognised option: %s\n", buf);
 		ret = -EINVAL;
-- 
cgit v1.2.3


From 6e71d2b2a2b717c3bddbe72cdf48dd07d53f8364 Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Fri, 12 Mar 2021 09:24:53 -0700
Subject: remoteproc: Refactor function rproc_cdev_release()

Refactor function rproc_cdev_release() to take into account the
current state of the remote processor when choosing the state to
transition to.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210312162453.1234145-18-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/remoteproc_cdev.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/remoteproc_cdev.c b/drivers/remoteproc/remoteproc_cdev.c
index 2db494816d5f..0b8a84c04f76 100644
--- a/drivers/remoteproc/remoteproc_cdev.c
+++ b/drivers/remoteproc/remoteproc_cdev.c
@@ -86,11 +86,17 @@ static long rproc_device_ioctl(struct file *filp, unsigned int ioctl, unsigned l
 static int rproc_cdev_release(struct inode *inode, struct file *filp)
 {
 	struct rproc *rproc = container_of(inode->i_cdev, struct rproc, cdev);
+	int ret = 0;
+
+	if (!rproc->cdev_put_on_release)
+		return 0;
 
-	if (rproc->cdev_put_on_release && rproc->state == RPROC_RUNNING)
+	if (rproc->state == RPROC_RUNNING)
 		rproc_shutdown(rproc);
+	else if (rproc->state == RPROC_ATTACHED)
+		ret = rproc_detach(rproc);
 
-	return 0;
+	return ret;
 }
 
 static const struct file_operations rproc_fops = {
-- 
cgit v1.2.3


From 6549f42c3d179575cd1466c4fd65d76680e49fed Mon Sep 17 00:00:00 2001
From: Govind Singh <govinds@codeaurora.org>
Date: Fri, 29 Jan 2021 00:18:12 +0530
Subject: remoteproc: qcom: wcss: populate hardcoded param using driver data

Q6 based WiFi fw loading is supported across
different targets, ex: IPQ8074/QCS404. In order to
support different fw names/pas id etc, populate
hardcoded param using driver data.

Signed-off-by: Govind Singh <govinds@codeaurora.org>
Signed-off-by: Gokul Sriram Palanisamy <gokulsri@codeaurora.org>
Link: https://lore.kernel.org/r/1611859695-11824-2-git-send-email-gokulsri@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/qcom_q6v5_wcss.c | 29 ++++++++++++++++++++++++-----
 1 file changed, 24 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c
index 704cd63c9af4..0a37c6e665df 100644
--- a/drivers/remoteproc/qcom_q6v5_wcss.c
+++ b/drivers/remoteproc/qcom_q6v5_wcss.c
@@ -71,6 +71,11 @@
 #define TCSR_WCSS_CLK_MASK	0x1F
 #define TCSR_WCSS_CLK_ENABLE	0x14
 
+struct wcss_data {
+	const char *firmware_name;
+	unsigned int crash_reason_smem;
+};
+
 struct q6v5_wcss {
 	struct device *dev;
 
@@ -93,6 +98,8 @@ struct q6v5_wcss {
 	void *mem_region;
 	size_t mem_size;
 
+	unsigned int crash_reason_smem;
+
 	struct qcom_rproc_glink glink_subdev;
 	struct qcom_rproc_ssr ssr_subdev;
 };
@@ -438,7 +445,7 @@ static int q6v5_wcss_load(struct rproc *rproc, const struct firmware *fw)
 	return ret;
 }
 
-static const struct rproc_ops q6v5_wcss_ops = {
+static const struct rproc_ops q6v5_wcss_ipq8074_ops = {
 	.start = q6v5_wcss_start,
 	.stop = q6v5_wcss_stop,
 	.da_to_va = q6v5_wcss_da_to_va,
@@ -538,12 +545,17 @@ static int q6v5_alloc_memory_region(struct q6v5_wcss *wcss)
 
 static int q6v5_wcss_probe(struct platform_device *pdev)
 {
+	const struct wcss_data *desc;
 	struct q6v5_wcss *wcss;
 	struct rproc *rproc;
 	int ret;
 
-	rproc = rproc_alloc(&pdev->dev, pdev->name, &q6v5_wcss_ops,
-			    "IPQ8074/q6_fw.mdt", sizeof(*wcss));
+	desc = device_get_match_data(&pdev->dev);
+	if (!desc)
+		return -EINVAL;
+
+	rproc = rproc_alloc(&pdev->dev, pdev->name, &q6v5_wcss_ipq8074_ops,
+			    desc->firmware_name, sizeof(*wcss));
 	if (!rproc) {
 		dev_err(&pdev->dev, "failed to allocate rproc\n");
 		return -ENOMEM;
@@ -551,6 +563,7 @@ static int q6v5_wcss_probe(struct platform_device *pdev)
 
 	wcss = rproc->priv;
 	wcss->dev = &pdev->dev;
+	wcss->crash_reason_smem = desc->crash_reason_smem;
 
 	ret = q6v5_wcss_init_mmio(wcss, pdev);
 	if (ret)
@@ -564,7 +577,8 @@ static int q6v5_wcss_probe(struct platform_device *pdev)
 	if (ret)
 		goto free_rproc;
 
-	ret = qcom_q6v5_init(&wcss->q6v5, pdev, rproc, WCSS_CRASH_REASON, NULL);
+	ret = qcom_q6v5_init(&wcss->q6v5, pdev, rproc, desc->crash_reason_smem,
+			     NULL);
 	if (ret)
 		goto free_rproc;
 
@@ -595,8 +609,13 @@ static int q6v5_wcss_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct wcss_data wcss_ipq8074_res_init = {
+	.firmware_name = "IPQ8074/q6_fw.mdt",
+	.crash_reason_smem = WCSS_CRASH_REASON,
+};
+
 static const struct of_device_id q6v5_wcss_of_match[] = {
-	{ .compatible = "qcom,ipq8074-wcss-pil" },
+	{ .compatible = "qcom,ipq8074-wcss-pil", .data = &wcss_ipq8074_res_init },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, q6v5_wcss_of_match);
-- 
cgit v1.2.3


From 0af65b9b915e52019aee91db3e1f8b39a7ec8d08 Mon Sep 17 00:00:00 2001
From: Govind Singh <govinds@codeaurora.org>
Date: Fri, 29 Jan 2021 00:18:14 +0530
Subject: remoteproc: qcom: wcss: Add non pas wcss Q6 support for QCS404

Add non PAS WCSS remoteproc driver support for QCS404 SOC.
Add WCSS q6 bootup and shutdown sequence handled from
Application Processor SubSystem(APSS).

Signed-off-by: Govind Singh <govinds@codeaurora.org>
Signed-off-by: Gokul Sriram Palanisamy <gokulsri@codeaurora.org>
Link: https://lore.kernel.org/r/1611859695-11824-4-git-send-email-gokulsri@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/qcom_q6v5_wcss.c | 566 +++++++++++++++++++++++++++++++++---
 1 file changed, 528 insertions(+), 38 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c
index 0a37c6e665df..d67264c93996 100644
--- a/drivers/remoteproc/qcom_q6v5_wcss.c
+++ b/drivers/remoteproc/qcom_q6v5_wcss.c
@@ -4,13 +4,18 @@
  * Copyright (C) 2014 Sony Mobile Communications AB
  * Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
  */
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
 #include <linux/iopoll.h>
 #include <linux/kernel.h>
 #include <linux/mfd/syscon.h>
 #include <linux/module.h>
+#include <linux/of_address.h>
 #include <linux/of_reserved_mem.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
 #include <linux/reset.h>
 #include <linux/soc/qcom/mdt_loader.h>
 #include "qcom_common.h"
@@ -24,6 +29,9 @@
 #define Q6SS_GFMUX_CTL_REG		0x020
 #define Q6SS_PWR_CTL_REG		0x030
 #define Q6SS_MEM_PWR_CTL		0x0B0
+#define Q6SS_STRAP_ACC			0x110
+#define Q6SS_CGC_OVERRIDE		0x034
+#define Q6SS_BCR_REG			0x6000
 
 /* AXI Halt Register Offsets */
 #define AXI_HALTREQ_REG			0x0
@@ -37,14 +45,19 @@
 #define Q6SS_CORE_ARES			BIT(1)
 #define Q6SS_BUS_ARES_ENABLE		BIT(2)
 
+/* Q6SS_BRC_RESET */
+#define Q6SS_BRC_BLK_ARES		BIT(0)
+
 /* Q6SS_GFMUX_CTL */
 #define Q6SS_CLK_ENABLE			BIT(1)
+#define Q6SS_SWITCH_CLK_SRC		BIT(8)
 
 /* Q6SS_PWR_CTL */
 #define Q6SS_L2DATA_STBY_N		BIT(18)
 #define Q6SS_SLP_RET_N			BIT(19)
 #define Q6SS_CLAMP_IO			BIT(20)
 #define QDSS_BHS_ON			BIT(21)
+#define QDSS_Q6_MEMORIES		GENMASK(15, 0)
 
 /* Q6SS parameters */
 #define Q6SS_LDO_BYP		BIT(25)
@@ -53,6 +66,7 @@
 #define Q6SS_CLAMP_QMC_MEM		BIT(22)
 #define HALT_CHECK_MAX_LOOPS		200
 #define Q6SS_XO_CBCR		GENMASK(5, 3)
+#define Q6SS_SLEEP_CBCR		GENMASK(5, 2)
 
 /* Q6SS config/status registers */
 #define TCSR_GLOBAL_CFG0	0x0
@@ -71,9 +85,23 @@
 #define TCSR_WCSS_CLK_MASK	0x1F
 #define TCSR_WCSS_CLK_ENABLE	0x14
 
+#define MAX_HALT_REG		3
+enum {
+	WCSS_IPQ8074,
+	WCSS_QCS404,
+};
+
 struct wcss_data {
 	const char *firmware_name;
 	unsigned int crash_reason_smem;
+	u32 version;
+	bool aon_reset_required;
+	bool wcss_q6_reset_required;
+	const char *ssr_name;
+	const char *sysmon_name;
+	int ssctl_id;
+	const struct rproc_ops *ops;
+	bool requires_force_stop;
 };
 
 struct q6v5_wcss {
@@ -87,9 +115,26 @@ struct q6v5_wcss {
 	u32 halt_wcss;
 	u32 halt_nc;
 
+	struct clk *xo;
+	struct clk *ahbfabric_cbcr_clk;
+	struct clk *gcc_abhs_cbcr;
+	struct clk *gcc_axim_cbcr;
+	struct clk *lcc_csr_cbcr;
+	struct clk *ahbs_cbcr;
+	struct clk *tcm_slave_cbcr;
+	struct clk *qdsp6ss_abhm_cbcr;
+	struct clk *qdsp6ss_sleep_cbcr;
+	struct clk *qdsp6ss_axim_cbcr;
+	struct clk *qdsp6ss_xo_cbcr;
+	struct clk *qdsp6ss_core_gfmux;
+	struct clk *lcc_bcr_sleep;
+	struct regulator *cx_supply;
+	struct qcom_sysmon *sysmon;
+
 	struct reset_control *wcss_aon_reset;
 	struct reset_control *wcss_reset;
 	struct reset_control *wcss_q6_reset;
+	struct reset_control *wcss_q6_bcr_reset;
 
 	struct qcom_q6v5 q6v5;
 
@@ -99,6 +144,8 @@ struct q6v5_wcss {
 	size_t mem_size;
 
 	unsigned int crash_reason_smem;
+	u32 version;
+	bool requires_force_stop;
 
 	struct qcom_rproc_glink glink_subdev;
 	struct qcom_rproc_ssr ssr_subdev;
@@ -244,6 +291,207 @@ wcss_reset:
 	return ret;
 }
 
+static int q6v5_wcss_qcs404_power_on(struct q6v5_wcss *wcss)
+{
+	unsigned long val;
+	int ret, idx;
+
+	/* Toggle the restart */
+	reset_control_assert(wcss->wcss_reset);
+	usleep_range(200, 300);
+	reset_control_deassert(wcss->wcss_reset);
+	usleep_range(200, 300);
+
+	/* Enable GCC_WDSP_Q6SS_AHBS_CBCR clock */
+	ret = clk_prepare_enable(wcss->gcc_abhs_cbcr);
+	if (ret)
+		return ret;
+
+	/* Remove reset to the WCNSS QDSP6SS */
+	reset_control_deassert(wcss->wcss_q6_bcr_reset);
+
+	/* Enable Q6SSTOP_AHBFABRIC_CBCR clock */
+	ret = clk_prepare_enable(wcss->ahbfabric_cbcr_clk);
+	if (ret)
+		goto disable_gcc_abhs_cbcr_clk;
+
+	/* Enable the LCCCSR CBC clock, Q6SSTOP_Q6SSTOP_LCC_CSR_CBCR clock */
+	ret = clk_prepare_enable(wcss->lcc_csr_cbcr);
+	if (ret)
+		goto disable_ahbfabric_cbcr_clk;
+
+	/* Enable the Q6AHBS CBC, Q6SSTOP_Q6SS_AHBS_CBCR clock */
+	ret = clk_prepare_enable(wcss->ahbs_cbcr);
+	if (ret)
+		goto disable_csr_cbcr_clk;
+
+	/* Enable the TCM slave CBC, Q6SSTOP_Q6SS_TCM_SLAVE_CBCR clock */
+	ret = clk_prepare_enable(wcss->tcm_slave_cbcr);
+	if (ret)
+		goto disable_ahbs_cbcr_clk;
+
+	/* Enable the Q6SS AHB master CBC, Q6SSTOP_Q6SS_AHBM_CBCR clock */
+	ret = clk_prepare_enable(wcss->qdsp6ss_abhm_cbcr);
+	if (ret)
+		goto disable_tcm_slave_cbcr_clk;
+
+	/* Enable the Q6SS AXI master CBC, Q6SSTOP_Q6SS_AXIM_CBCR clock */
+	ret = clk_prepare_enable(wcss->qdsp6ss_axim_cbcr);
+	if (ret)
+		goto disable_abhm_cbcr_clk;
+
+	/* Enable the Q6SS XO CBC */
+	val = readl(wcss->reg_base + Q6SS_XO_CBCR);
+	val |= BIT(0);
+	writel(val, wcss->reg_base + Q6SS_XO_CBCR);
+	/* Read CLKOFF bit to go low indicating CLK is enabled */
+	ret = readl_poll_timeout(wcss->reg_base + Q6SS_XO_CBCR,
+				 val, !(val & BIT(31)), 1,
+				 HALT_CHECK_MAX_LOOPS);
+	if (ret) {
+		dev_err(wcss->dev,
+			"xo cbcr enabling timed out (rc:%d)\n", ret);
+		return ret;
+	}
+
+	writel(0, wcss->reg_base + Q6SS_CGC_OVERRIDE);
+
+	/* Enable QDSP6 sleep clock clock */
+	val = readl(wcss->reg_base + Q6SS_SLEEP_CBCR);
+	val |= BIT(0);
+	writel(val, wcss->reg_base + Q6SS_SLEEP_CBCR);
+
+	/* Enable the Enable the Q6 AXI clock, GCC_WDSP_Q6SS_AXIM_CBCR*/
+	ret = clk_prepare_enable(wcss->gcc_axim_cbcr);
+	if (ret)
+		goto disable_sleep_cbcr_clk;
+
+	/* Assert resets, stop core */
+	val = readl(wcss->reg_base + Q6SS_RESET_REG);
+	val |= Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENABLE | Q6SS_STOP_CORE;
+	writel(val, wcss->reg_base + Q6SS_RESET_REG);
+
+	/* Program the QDSP6SS PWR_CTL register */
+	writel(0x01700000, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	writel(0x03700000, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	writel(0x03300000, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	writel(0x033C0000, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	/*
+	 * Enable memories by turning on the QDSP6 memory foot/head switch, one
+	 * bank at a time to avoid in-rush current
+	 */
+	for (idx = 28; idx >= 0; idx--) {
+		writel((readl(wcss->reg_base + Q6SS_MEM_PWR_CTL) |
+			(1 << idx)), wcss->reg_base + Q6SS_MEM_PWR_CTL);
+	}
+
+	writel(0x031C0000, wcss->reg_base + Q6SS_PWR_CTL_REG);
+	writel(0x030C0000, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	val = readl(wcss->reg_base + Q6SS_RESET_REG);
+	val &= ~Q6SS_CORE_ARES;
+	writel(val, wcss->reg_base + Q6SS_RESET_REG);
+
+	/* Enable the Q6 core clock at the GFM, Q6SSTOP_QDSP6SS_GFMUX_CTL */
+	val = readl(wcss->reg_base + Q6SS_GFMUX_CTL_REG);
+	val |= Q6SS_CLK_ENABLE | Q6SS_SWITCH_CLK_SRC;
+	writel(val, wcss->reg_base + Q6SS_GFMUX_CTL_REG);
+
+	/* Enable sleep clock branch needed for BCR circuit */
+	ret = clk_prepare_enable(wcss->lcc_bcr_sleep);
+	if (ret)
+		goto disable_core_gfmux_clk;
+
+	return 0;
+
+disable_core_gfmux_clk:
+	val = readl(wcss->reg_base + Q6SS_GFMUX_CTL_REG);
+	val &= ~(Q6SS_CLK_ENABLE | Q6SS_SWITCH_CLK_SRC);
+	writel(val, wcss->reg_base + Q6SS_GFMUX_CTL_REG);
+	clk_disable_unprepare(wcss->gcc_axim_cbcr);
+disable_sleep_cbcr_clk:
+	val = readl(wcss->reg_base + Q6SS_SLEEP_CBCR);
+	val &= ~Q6SS_CLK_ENABLE;
+	writel(val, wcss->reg_base + Q6SS_SLEEP_CBCR);
+	val = readl(wcss->reg_base + Q6SS_XO_CBCR);
+	val &= ~Q6SS_CLK_ENABLE;
+	writel(val, wcss->reg_base + Q6SS_XO_CBCR);
+	clk_disable_unprepare(wcss->qdsp6ss_axim_cbcr);
+disable_abhm_cbcr_clk:
+	clk_disable_unprepare(wcss->qdsp6ss_abhm_cbcr);
+disable_tcm_slave_cbcr_clk:
+	clk_disable_unprepare(wcss->tcm_slave_cbcr);
+disable_ahbs_cbcr_clk:
+	clk_disable_unprepare(wcss->ahbs_cbcr);
+disable_csr_cbcr_clk:
+	clk_disable_unprepare(wcss->lcc_csr_cbcr);
+disable_ahbfabric_cbcr_clk:
+	clk_disable_unprepare(wcss->ahbfabric_cbcr_clk);
+disable_gcc_abhs_cbcr_clk:
+	clk_disable_unprepare(wcss->gcc_abhs_cbcr);
+
+	return ret;
+}
+
+static inline int q6v5_wcss_qcs404_reset(struct q6v5_wcss *wcss)
+{
+	unsigned long val;
+
+	writel(0x80800000, wcss->reg_base + Q6SS_STRAP_ACC);
+
+	/* Start core execution */
+	val = readl(wcss->reg_base + Q6SS_RESET_REG);
+	val &= ~Q6SS_STOP_CORE;
+	writel(val, wcss->reg_base + Q6SS_RESET_REG);
+
+	return 0;
+}
+
+static int q6v5_qcs404_wcss_start(struct rproc *rproc)
+{
+	struct q6v5_wcss *wcss = rproc->priv;
+	int ret;
+
+	ret = clk_prepare_enable(wcss->xo);
+	if (ret)
+		return ret;
+
+	ret = regulator_enable(wcss->cx_supply);
+	if (ret)
+		goto disable_xo_clk;
+
+	qcom_q6v5_prepare(&wcss->q6v5);
+
+	ret = q6v5_wcss_qcs404_power_on(wcss);
+	if (ret) {
+		dev_err(wcss->dev, "wcss clk_enable failed\n");
+		goto disable_cx_supply;
+	}
+
+	writel(rproc->bootaddr >> 4, wcss->reg_base + Q6SS_RST_EVB);
+
+	q6v5_wcss_qcs404_reset(wcss);
+
+	ret = qcom_q6v5_wait_for_start(&wcss->q6v5, 5 * HZ);
+	if (ret == -ETIMEDOUT) {
+		dev_err(wcss->dev, "start timed out\n");
+		goto disable_cx_supply;
+	}
+
+	return 0;
+
+disable_cx_supply:
+	regulator_disable(wcss->cx_supply);
+disable_xo_clk:
+	clk_disable_unprepare(wcss->xo);
+
+	return ret;
+}
+
 static void q6v5_wcss_halt_axi_port(struct q6v5_wcss *wcss,
 				    struct regmap *halt_map,
 				    u32 offset)
@@ -278,6 +526,70 @@ static void q6v5_wcss_halt_axi_port(struct q6v5_wcss *wcss,
 	regmap_write(halt_map, offset + AXI_HALTREQ_REG, 0);
 }
 
+static int q6v5_qcs404_wcss_shutdown(struct q6v5_wcss *wcss)
+{
+	unsigned long val;
+	int ret;
+
+	q6v5_wcss_halt_axi_port(wcss, wcss->halt_map, wcss->halt_wcss);
+
+	/* assert clamps to avoid MX current inrush */
+	val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
+	val |= (Q6SS_CLAMP_IO | Q6SS_CLAMP_WL | Q6SS_CLAMP_QMC_MEM);
+	writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	/* Disable memories by turning off memory foot/headswitch */
+	writel((readl(wcss->reg_base + Q6SS_MEM_PWR_CTL) &
+		~QDSS_Q6_MEMORIES),
+		wcss->reg_base + Q6SS_MEM_PWR_CTL);
+
+	/* Clear the BHS_ON bit */
+	val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
+	val &= ~Q6SS_BHS_ON;
+	writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	clk_disable_unprepare(wcss->ahbfabric_cbcr_clk);
+	clk_disable_unprepare(wcss->lcc_csr_cbcr);
+	clk_disable_unprepare(wcss->tcm_slave_cbcr);
+	clk_disable_unprepare(wcss->qdsp6ss_abhm_cbcr);
+	clk_disable_unprepare(wcss->qdsp6ss_axim_cbcr);
+
+	val = readl(wcss->reg_base + Q6SS_SLEEP_CBCR);
+	val &= ~BIT(0);
+	writel(val, wcss->reg_base + Q6SS_SLEEP_CBCR);
+
+	val = readl(wcss->reg_base + Q6SS_XO_CBCR);
+	val &= ~BIT(0);
+	writel(val, wcss->reg_base + Q6SS_XO_CBCR);
+
+	clk_disable_unprepare(wcss->ahbs_cbcr);
+	clk_disable_unprepare(wcss->lcc_bcr_sleep);
+
+	val = readl(wcss->reg_base + Q6SS_GFMUX_CTL_REG);
+	val &= ~(Q6SS_CLK_ENABLE | Q6SS_SWITCH_CLK_SRC);
+	writel(val, wcss->reg_base + Q6SS_GFMUX_CTL_REG);
+
+	clk_disable_unprepare(wcss->gcc_abhs_cbcr);
+
+	ret = reset_control_assert(wcss->wcss_reset);
+	if (ret) {
+		dev_err(wcss->dev, "wcss_reset failed\n");
+		return ret;
+	}
+	usleep_range(200, 300);
+
+	ret = reset_control_deassert(wcss->wcss_reset);
+	if (ret) {
+		dev_err(wcss->dev, "wcss_reset failed\n");
+		return ret;
+	}
+	usleep_range(200, 300);
+
+	clk_disable_unprepare(wcss->gcc_axim_cbcr);
+
+	return 0;
+}
+
 static int q6v5_wcss_powerdown(struct q6v5_wcss *wcss)
 {
 	int ret;
@@ -397,20 +709,28 @@ static int q6v5_wcss_stop(struct rproc *rproc)
 	int ret;
 
 	/* WCSS powerdown */
-	ret = qcom_q6v5_request_stop(&wcss->q6v5, NULL);
-	if (ret == -ETIMEDOUT) {
-		dev_err(wcss->dev, "timed out on wait\n");
-		return ret;
+	if (wcss->requires_force_stop) {
+		ret = qcom_q6v5_request_stop(&wcss->q6v5, NULL);
+		if (ret == -ETIMEDOUT) {
+			dev_err(wcss->dev, "timed out on wait\n");
+			return ret;
+		}
 	}
 
-	ret = q6v5_wcss_powerdown(wcss);
-	if (ret)
-		return ret;
-
-	/* Q6 Power down */
-	ret = q6v5_q6_powerdown(wcss);
-	if (ret)
-		return ret;
+	if (wcss->version == WCSS_QCS404) {
+		ret = q6v5_qcs404_wcss_shutdown(wcss);
+		if (ret)
+			return ret;
+	} else {
+		ret = q6v5_wcss_powerdown(wcss);
+		if (ret)
+			return ret;
+
+		/* Q6 Power down */
+		ret = q6v5_q6_powerdown(wcss);
+		if (ret)
+			return ret;
+	}
 
 	qcom_q6v5_unprepare(&wcss->q6v5);
 
@@ -453,14 +773,26 @@ static const struct rproc_ops q6v5_wcss_ipq8074_ops = {
 	.get_boot_addr = rproc_elf_get_boot_addr,
 };
 
-static int q6v5_wcss_init_reset(struct q6v5_wcss *wcss)
+static const struct rproc_ops q6v5_wcss_qcs404_ops = {
+	.start = q6v5_qcs404_wcss_start,
+	.stop = q6v5_wcss_stop,
+	.da_to_va = q6v5_wcss_da_to_va,
+	.load = q6v5_wcss_load,
+	.get_boot_addr = rproc_elf_get_boot_addr,
+	.parse_fw = qcom_register_dump_segments,
+};
+
+static int q6v5_wcss_init_reset(struct q6v5_wcss *wcss,
+				const struct wcss_data *desc)
 {
 	struct device *dev = wcss->dev;
 
-	wcss->wcss_aon_reset = devm_reset_control_get(dev, "wcss_aon_reset");
-	if (IS_ERR(wcss->wcss_aon_reset)) {
-		dev_err(wcss->dev, "unable to acquire wcss_aon_reset\n");
-		return PTR_ERR(wcss->wcss_aon_reset);
+	if (desc->aon_reset_required) {
+		wcss->wcss_aon_reset = devm_reset_control_get(dev, "wcss_aon_reset");
+		if (IS_ERR(wcss->wcss_aon_reset)) {
+			dev_err(wcss->dev, "fail to acquire wcss_aon_reset\n");
+			return PTR_ERR(wcss->wcss_aon_reset);
+		}
 	}
 
 	wcss->wcss_reset = devm_reset_control_get(dev, "wcss_reset");
@@ -469,10 +801,18 @@ static int q6v5_wcss_init_reset(struct q6v5_wcss *wcss)
 		return PTR_ERR(wcss->wcss_reset);
 	}
 
-	wcss->wcss_q6_reset = devm_reset_control_get(dev, "wcss_q6_reset");
-	if (IS_ERR(wcss->wcss_q6_reset)) {
-		dev_err(wcss->dev, "unable to acquire wcss_q6_reset\n");
-		return PTR_ERR(wcss->wcss_q6_reset);
+	if (desc->wcss_q6_reset_required) {
+		wcss->wcss_q6_reset = devm_reset_control_get(dev, "wcss_q6_reset");
+		if (IS_ERR(wcss->wcss_q6_reset)) {
+			dev_err(wcss->dev, "unable to acquire wcss_q6_reset\n");
+			return PTR_ERR(wcss->wcss_q6_reset);
+		}
+	}
+
+	wcss->wcss_q6_bcr_reset = devm_reset_control_get_exclusive(dev, "wcss_q6_bcr_reset");
+	if (IS_ERR(wcss->wcss_q6_bcr_reset)) {
+		dev_err(wcss->dev, "unable to acquire wcss_q6_bcr_reset\n");
+		return PTR_ERR(wcss->wcss_q6_bcr_reset);
 	}
 
 	return 0;
@@ -481,35 +821,48 @@ static int q6v5_wcss_init_reset(struct q6v5_wcss *wcss)
 static int q6v5_wcss_init_mmio(struct q6v5_wcss *wcss,
 			       struct platform_device *pdev)
 {
-	struct of_phandle_args args;
+	unsigned int halt_reg[MAX_HALT_REG] = {0};
+	struct device_node *syscon;
 	struct resource *res;
 	int ret;
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qdsp6");
-	wcss->reg_base = devm_ioremap_resource(&pdev->dev, res);
+	wcss->reg_base = devm_ioremap(&pdev->dev, res->start,
+				      resource_size(res));
 	if (IS_ERR(wcss->reg_base))
 		return PTR_ERR(wcss->reg_base);
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rmb");
-	wcss->rmb_base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(wcss->rmb_base))
-		return PTR_ERR(wcss->rmb_base);
+	if (wcss->version == WCSS_IPQ8074) {
+		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rmb");
+		wcss->rmb_base = devm_ioremap_resource(&pdev->dev, res);
+		if (IS_ERR(wcss->rmb_base))
+			return PTR_ERR(wcss->rmb_base);
+	}
 
-	ret = of_parse_phandle_with_fixed_args(pdev->dev.of_node,
-					       "qcom,halt-regs", 3, 0, &args);
-	if (ret < 0) {
+	syscon = of_parse_phandle(pdev->dev.of_node,
+				  "qcom,halt-regs", 0);
+	if (!syscon) {
 		dev_err(&pdev->dev, "failed to parse qcom,halt-regs\n");
 		return -EINVAL;
 	}
 
-	wcss->halt_map = syscon_node_to_regmap(args.np);
-	of_node_put(args.np);
+	wcss->halt_map = syscon_node_to_regmap(syscon);
+	of_node_put(syscon);
 	if (IS_ERR(wcss->halt_map))
 		return PTR_ERR(wcss->halt_map);
 
-	wcss->halt_q6 = args.args[0];
-	wcss->halt_wcss = args.args[1];
-	wcss->halt_nc = args.args[2];
+	ret = of_property_read_variable_u32_array(pdev->dev.of_node,
+						  "qcom,halt-regs",
+						  halt_reg, 0,
+						  MAX_HALT_REG);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to parse qcom,halt-regs\n");
+		return -EINVAL;
+	}
+
+	wcss->halt_q6 = halt_reg[0];
+	wcss->halt_wcss = halt_reg[1];
+	wcss->halt_nc = halt_reg[2];
 
 	return 0;
 }
@@ -543,6 +896,107 @@ static int q6v5_alloc_memory_region(struct q6v5_wcss *wcss)
 	return 0;
 }
 
+static int q6v5_wcss_init_clock(struct q6v5_wcss *wcss)
+{
+	int ret;
+
+	wcss->xo = devm_clk_get(wcss->dev, "xo");
+	if (IS_ERR(wcss->xo)) {
+		ret = PTR_ERR(wcss->xo);
+		if (ret != -EPROBE_DEFER)
+			dev_err(wcss->dev, "failed to get xo clock");
+		return ret;
+	}
+
+	wcss->gcc_abhs_cbcr = devm_clk_get(wcss->dev, "gcc_abhs_cbcr");
+	if (IS_ERR(wcss->gcc_abhs_cbcr)) {
+		ret = PTR_ERR(wcss->gcc_abhs_cbcr);
+		if (ret != -EPROBE_DEFER)
+			dev_err(wcss->dev, "failed to get gcc abhs clock");
+		return PTR_ERR(wcss->gcc_abhs_cbcr);
+	}
+
+	wcss->gcc_axim_cbcr = devm_clk_get(wcss->dev, "gcc_axim_cbcr");
+	if (IS_ERR(wcss->gcc_axim_cbcr)) {
+		ret = PTR_ERR(wcss->gcc_axim_cbcr);
+		if (ret != -EPROBE_DEFER)
+			dev_err(wcss->dev, "failed to get gcc axim clock\n");
+		return PTR_ERR(wcss->gcc_axim_cbcr);
+	}
+
+	wcss->ahbfabric_cbcr_clk = devm_clk_get(wcss->dev,
+						"lcc_ahbfabric_cbc");
+	if (IS_ERR(wcss->ahbfabric_cbcr_clk)) {
+		ret = PTR_ERR(wcss->ahbfabric_cbcr_clk);
+		if (ret != -EPROBE_DEFER)
+			dev_err(wcss->dev, "failed to get ahbfabric clock\n");
+		return PTR_ERR(wcss->ahbfabric_cbcr_clk);
+	}
+
+	wcss->lcc_csr_cbcr = devm_clk_get(wcss->dev, "tcsr_lcc_cbc");
+	if (IS_ERR(wcss->lcc_csr_cbcr)) {
+		ret = PTR_ERR(wcss->lcc_csr_cbcr);
+		if (ret != -EPROBE_DEFER)
+			dev_err(wcss->dev, "failed to get csr cbcr clk\n");
+		return PTR_ERR(wcss->lcc_csr_cbcr);
+	}
+
+	wcss->ahbs_cbcr = devm_clk_get(wcss->dev,
+				       "lcc_abhs_cbc");
+	if (IS_ERR(wcss->ahbs_cbcr)) {
+		ret = PTR_ERR(wcss->ahbs_cbcr);
+		if (ret != -EPROBE_DEFER)
+			dev_err(wcss->dev, "failed to get ahbs_cbcr clk\n");
+		return PTR_ERR(wcss->ahbs_cbcr);
+	}
+
+	wcss->tcm_slave_cbcr = devm_clk_get(wcss->dev,
+					    "lcc_tcm_slave_cbc");
+	if (IS_ERR(wcss->tcm_slave_cbcr)) {
+		ret = PTR_ERR(wcss->tcm_slave_cbcr);
+		if (ret != -EPROBE_DEFER)
+			dev_err(wcss->dev, "failed to get tcm cbcr clk\n");
+		return PTR_ERR(wcss->tcm_slave_cbcr);
+	}
+
+	wcss->qdsp6ss_abhm_cbcr = devm_clk_get(wcss->dev, "lcc_abhm_cbc");
+	if (IS_ERR(wcss->qdsp6ss_abhm_cbcr)) {
+		ret = PTR_ERR(wcss->qdsp6ss_abhm_cbcr);
+		if (ret != -EPROBE_DEFER)
+			dev_err(wcss->dev, "failed to get abhm cbcr clk\n");
+		return PTR_ERR(wcss->qdsp6ss_abhm_cbcr);
+	}
+
+	wcss->qdsp6ss_axim_cbcr = devm_clk_get(wcss->dev, "lcc_axim_cbc");
+	if (IS_ERR(wcss->qdsp6ss_axim_cbcr)) {
+		ret = PTR_ERR(wcss->qdsp6ss_axim_cbcr);
+		if (ret != -EPROBE_DEFER)
+			dev_err(wcss->dev, "failed to get axim cbcr clk\n");
+		return PTR_ERR(wcss->qdsp6ss_abhm_cbcr);
+	}
+
+	wcss->lcc_bcr_sleep = devm_clk_get(wcss->dev, "lcc_bcr_sleep");
+	if (IS_ERR(wcss->lcc_bcr_sleep)) {
+		ret = PTR_ERR(wcss->lcc_bcr_sleep);
+		if (ret != -EPROBE_DEFER)
+			dev_err(wcss->dev, "failed to get bcr cbcr clk\n");
+		return PTR_ERR(wcss->lcc_bcr_sleep);
+	}
+
+	return 0;
+}
+
+static int q6v5_wcss_init_regulator(struct q6v5_wcss *wcss)
+{
+	wcss->cx_supply = devm_regulator_get(wcss->dev, "cx");
+	if (IS_ERR(wcss->cx_supply))
+		return PTR_ERR(wcss->cx_supply);
+
+	regulator_set_load(wcss->cx_supply, 100000);
+
+	return 0;
+}
+
 static int q6v5_wcss_probe(struct platform_device *pdev)
 {
 	const struct wcss_data *desc;
@@ -554,7 +1008,7 @@ static int q6v5_wcss_probe(struct platform_device *pdev)
 	if (!desc)
 		return -EINVAL;
 
-	rproc = rproc_alloc(&pdev->dev, pdev->name, &q6v5_wcss_ipq8074_ops,
+	rproc = rproc_alloc(&pdev->dev, pdev->name, desc->ops,
 			    desc->firmware_name, sizeof(*wcss));
 	if (!rproc) {
 		dev_err(&pdev->dev, "failed to allocate rproc\n");
@@ -563,7 +1017,10 @@ static int q6v5_wcss_probe(struct platform_device *pdev)
 
 	wcss = rproc->priv;
 	wcss->dev = &pdev->dev;
-	wcss->crash_reason_smem = desc->crash_reason_smem;
+	wcss->version = desc->version;
+
+	wcss->version = desc->version;
+	wcss->requires_force_stop = desc->requires_force_stop;
 
 	ret = q6v5_wcss_init_mmio(wcss, pdev);
 	if (ret)
@@ -573,7 +1030,17 @@ static int q6v5_wcss_probe(struct platform_device *pdev)
 	if (ret)
 		goto free_rproc;
 
-	ret = q6v5_wcss_init_reset(wcss);
+	if (wcss->version == WCSS_QCS404) {
+		ret = q6v5_wcss_init_clock(wcss);
+		if (ret)
+			goto free_rproc;
+
+		ret = q6v5_wcss_init_regulator(wcss);
+		if (ret)
+			goto free_rproc;
+	}
+
+	ret = q6v5_wcss_init_reset(wcss, desc);
 	if (ret)
 		goto free_rproc;
 
@@ -585,6 +1052,11 @@ static int q6v5_wcss_probe(struct platform_device *pdev)
 	qcom_add_glink_subdev(rproc, &wcss->glink_subdev, "q6wcss");
 	qcom_add_ssr_subdev(rproc, &wcss->ssr_subdev, "q6wcss");
 
+	if (desc->ssctl_id)
+		wcss->sysmon = qcom_add_sysmon_subdev(rproc,
+						      desc->sysmon_name,
+						      desc->ssctl_id);
+
 	ret = rproc_add(rproc);
 	if (ret)
 		goto free_rproc;
@@ -612,10 +1084,28 @@ static int q6v5_wcss_remove(struct platform_device *pdev)
 static const struct wcss_data wcss_ipq8074_res_init = {
 	.firmware_name = "IPQ8074/q6_fw.mdt",
 	.crash_reason_smem = WCSS_CRASH_REASON,
+	.aon_reset_required = true,
+	.wcss_q6_reset_required = true,
+	.ops = &q6v5_wcss_ipq8074_ops,
+	.requires_force_stop = true,
+};
+
+static const struct wcss_data wcss_qcs404_res_init = {
+	.crash_reason_smem = WCSS_CRASH_REASON,
+	.firmware_name = "wcnss.mdt",
+	.version = WCSS_QCS404,
+	.aon_reset_required = false,
+	.wcss_q6_reset_required = false,
+	.ssr_name = "mpss",
+	.sysmon_name = "wcnss",
+	.ssctl_id = 0x12,
+	.ops = &q6v5_wcss_qcs404_ops,
+	.requires_force_stop = false,
 };
 
 static const struct of_device_id q6v5_wcss_of_match[] = {
 	{ .compatible = "qcom,ipq8074-wcss-pil", .data = &wcss_ipq8074_res_init },
+	{ .compatible = "qcom,qcs404-wcss-pil", .data = &wcss_qcs404_res_init },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, q6v5_wcss_of_match);
-- 
cgit v1.2.3


From bb91c9ee518cd7353f2301f4bd6b65ea42a750d4 Mon Sep 17 00:00:00 2001
From: Govind Singh <govinds@codeaurora.org>
Date: Fri, 29 Jan 2021 00:18:15 +0530
Subject: remoteproc: qcom: wcss: explicitly request exclusive reset control

Use request exclusive reset control for wcss reset controls.

Signed-off-by: Govind Singh <govinds@codeaurora.org>
Signed-off-by: Gokul Sriram Palanisamy <gokulsri@codeaurora.org>
Link: https://lore.kernel.org/r/1611859695-11824-5-git-send-email-gokulsri@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/qcom_q6v5_wcss.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c
index d67264c93996..71ec1a451e35 100644
--- a/drivers/remoteproc/qcom_q6v5_wcss.c
+++ b/drivers/remoteproc/qcom_q6v5_wcss.c
@@ -788,21 +788,21 @@ static int q6v5_wcss_init_reset(struct q6v5_wcss *wcss,
 	struct device *dev = wcss->dev;
 
 	if (desc->aon_reset_required) {
-		wcss->wcss_aon_reset = devm_reset_control_get(dev, "wcss_aon_reset");
+		wcss->wcss_aon_reset = devm_reset_control_get_exclusive(dev, "wcss_aon_reset");
 		if (IS_ERR(wcss->wcss_aon_reset)) {
 			dev_err(wcss->dev, "fail to acquire wcss_aon_reset\n");
 			return PTR_ERR(wcss->wcss_aon_reset);
 		}
 	}
 
-	wcss->wcss_reset = devm_reset_control_get(dev, "wcss_reset");
+	wcss->wcss_reset = devm_reset_control_get_exclusive(dev, "wcss_reset");
 	if (IS_ERR(wcss->wcss_reset)) {
 		dev_err(wcss->dev, "unable to acquire wcss_reset\n");
 		return PTR_ERR(wcss->wcss_reset);
 	}
 
 	if (desc->wcss_q6_reset_required) {
-		wcss->wcss_q6_reset = devm_reset_control_get(dev, "wcss_q6_reset");
+		wcss->wcss_q6_reset = devm_reset_control_get_exclusive(dev, "wcss_q6_reset");
 		if (IS_ERR(wcss->wcss_q6_reset)) {
 			dev_err(wcss->dev, "unable to acquire wcss_q6_reset\n");
 			return PTR_ERR(wcss->wcss_q6_reset);
-- 
cgit v1.2.3


From 48073935b9a4f820733937bd40a74c1c389caee6 Mon Sep 17 00:00:00 2001
From: Bjorn Andersson <bjorn.andersson@linaro.org>
Date: Thu, 11 Mar 2021 16:24:41 -0800
Subject: remoteproc: qcom: wcnss: Allow specifying firmware-name

Introduce a firmware-name property, in order to be able to support
device/platform specific firmware for the wireless connectivity
subsystem; in line with other Qualcomm remoteproc drivers.

Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210312002441.3273183-1-bjorn.andersson@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 Documentation/devicetree/bindings/remoteproc/qcom,wcnss-pil.txt | 6 ++++++
 drivers/remoteproc/qcom_wcnss.c                                 | 8 +++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,wcnss-pil.txt b/Documentation/devicetree/bindings/remoteproc/qcom,wcnss-pil.txt
index da09c0d79ac0..a83080b8905c 100644
--- a/Documentation/devicetree/bindings/remoteproc/qcom,wcnss-pil.txt
+++ b/Documentation/devicetree/bindings/remoteproc/qcom,wcnss-pil.txt
@@ -34,6 +34,12 @@ on the Qualcomm WCNSS core.
 	Definition: should be "wdog", "fatal", optionally followed by "ready",
 		    "handover", "stop-ack"
 
+- firmware-name:
+	Usage: optional
+	Value type: <string>
+	Definition: must list the relative firmware image path for the
+		    WCNSS core. Defaults to "wcnss.mdt".
+
 - vddmx-supply: (deprecated for qcom,pronto-v1/2-pil)
 - vddcx-supply: (deprecated for qcom,pronto-v1/2-pil)
 - vddpx-supply:
diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c
index 3a131163064c..5f3455aa7e0e 100644
--- a/drivers/remoteproc/qcom_wcnss.c
+++ b/drivers/remoteproc/qcom_wcnss.c
@@ -530,6 +530,7 @@ static int wcnss_alloc_memory_region(struct qcom_wcnss *wcnss)
 
 static int wcnss_probe(struct platform_device *pdev)
 {
+	const char *fw_name = WCNSS_FIRMWARE_NAME;
 	const struct wcnss_data *data;
 	struct qcom_wcnss *wcnss;
 	struct resource *res;
@@ -547,8 +548,13 @@ static int wcnss_probe(struct platform_device *pdev)
 		return -ENXIO;
 	}
 
+	ret = of_property_read_string(pdev->dev.of_node, "firmware-name",
+				      &fw_name);
+	if (ret < 0 && ret != -EINVAL)
+		return ret;
+
 	rproc = rproc_alloc(&pdev->dev, pdev->name, &wcnss_ops,
-			    WCNSS_FIRMWARE_NAME, sizeof(*wcnss));
+			    fw_name, sizeof(*wcnss));
 	if (!rproc) {
 		dev_err(&pdev->dev, "unable to allocate remoteproc\n");
 		return -ENOMEM;
-- 
cgit v1.2.3


From 73f620951b2b594bdc38722c0d647c3b3312af7a Mon Sep 17 00:00:00 2001
From: Claire Chang <tientzu@chromium.org>
Date: Thu, 18 Mar 2021 17:14:22 +0100
Subject: swiotlb: move global variables into a new io_tlb_mem structure

Added a new struct, io_tlb_mem, as the IO TLB memory pool descriptor and
moved relevant global variables into that struct.
This will be useful later to allow for restricted DMA pool.

Signed-off-by: Claire Chang <tientzu@chromium.org>
[hch: rebased]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/xen/swiotlb-xen.c |   2 +-
 include/linux/swiotlb.h   |  43 +++++-
 kernel/dma/swiotlb.c      | 354 +++++++++++++++++++++-------------------------
 3 files changed, 206 insertions(+), 193 deletions(-)

(limited to 'drivers')

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 4ecfce2c6f72..5329ad54a5f3 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -548,7 +548,7 @@ xen_swiotlb_sync_sg_for_device(struct device *dev, struct scatterlist *sgl,
 static int
 xen_swiotlb_dma_supported(struct device *hwdev, u64 mask)
 {
-	return xen_phys_to_dma(hwdev, io_tlb_end - 1) <= mask;
+	return xen_phys_to_dma(hwdev, io_tlb_default_mem.end - 1) <= mask;
 }
 
 const struct dma_map_ops xen_swiotlb_dma_ops = {
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 0696bdc8072e..5ec5378b17c3 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -6,6 +6,7 @@
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/limits.h>
+#include <linux/spinlock.h>
 
 struct device;
 struct page;
@@ -61,11 +62,49 @@ dma_addr_t swiotlb_map(struct device *dev, phys_addr_t phys,
 
 #ifdef CONFIG_SWIOTLB
 extern enum swiotlb_force swiotlb_force;
-extern phys_addr_t io_tlb_start, io_tlb_end;
+
+/**
+ * struct io_tlb_mem - IO TLB Memory Pool Descriptor
+ *
+ * @start:	The start address of the swiotlb memory pool. Used to do a quick
+ *		range check to see if the memory was in fact allocated by this
+ *		API.
+ * @end:	The end address of the swiotlb memory pool. Used to do a quick
+ *		range check to see if the memory was in fact allocated by this
+ *		API.
+ * @nslabs:	The number of IO TLB blocks (in groups of 64) between @start and
+ *		@end. This is command line adjustable via setup_io_tlb_npages.
+ * @used:	The number of used IO TLB block.
+ * @list:	The free list describing the number of free entries available
+ *		from each index.
+ * @index:	The index to start searching in the next round.
+ * @orig_addr:	The original address corresponding to a mapped entry.
+ * @alloc_size:	Size of the allocated buffer.
+ * @lock:	The lock to protect the above data structures in the map and
+ *		unmap calls.
+ * @debugfs:	The dentry to debugfs.
+ * @late_alloc:	%true if allocated using the page allocator
+ */
+struct io_tlb_mem {
+	phys_addr_t start;
+	phys_addr_t end;
+	unsigned long nslabs;
+	unsigned long used;
+	unsigned int *list;
+	unsigned int index;
+	phys_addr_t *orig_addr;
+	size_t *alloc_size;
+	spinlock_t lock;
+	struct dentry *debugfs;
+	bool late_alloc;
+};
+extern struct io_tlb_mem io_tlb_default_mem;
 
 static inline bool is_swiotlb_buffer(phys_addr_t paddr)
 {
-	return paddr >= io_tlb_start && paddr < io_tlb_end;
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
+
+	return paddr >= mem->start && paddr < mem->end;
 }
 
 void __init swiotlb_exit(void);
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 35e24f0ff8b2..d9c097f0f78c 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -59,32 +59,11 @@
  */
 #define IO_TLB_MIN_SLABS ((1<<20) >> IO_TLB_SHIFT)
 
-enum swiotlb_force swiotlb_force;
-
-/*
- * Used to do a quick range check in swiotlb_tbl_unmap_single and
- * swiotlb_tbl_sync_single_*, to see if the memory was in fact allocated by this
- * API.
- */
-phys_addr_t io_tlb_start, io_tlb_end;
-
-/*
- * The number of IO TLB blocks (in groups of 64) between io_tlb_start and
- * io_tlb_end.  This is command line adjustable via setup_io_tlb_npages.
- */
-static unsigned long io_tlb_nslabs;
+#define INVALID_PHYS_ADDR (~(phys_addr_t)0)
 
-/*
- * The number of used IO TLB block
- */
-static unsigned long io_tlb_used;
+enum swiotlb_force swiotlb_force;
 
-/*
- * This is a free list describing the number of free entries available from
- * each index
- */
-static unsigned int *io_tlb_list;
-static unsigned int io_tlb_index;
+struct io_tlb_mem io_tlb_default_mem;
 
 /*
  * Max segment that we can provide which (if pages are contingous) will
@@ -92,32 +71,15 @@ static unsigned int io_tlb_index;
  */
 static unsigned int max_segment;
 
-/*
- * We need to save away the original address corresponding to a mapped entry
- * for the sync operations.
- */
-#define INVALID_PHYS_ADDR (~(phys_addr_t)0)
-static phys_addr_t *io_tlb_orig_addr;
-
-/*
- * The mapped buffer's size should be validated during a sync operation.
- */
-static size_t *io_tlb_alloc_size;
-
-/*
- * Protect the above data structures in the map and unmap calls
- */
-static DEFINE_SPINLOCK(io_tlb_lock);
-
-static int late_alloc;
-
 static int __init
 setup_io_tlb_npages(char *str)
 {
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
+
 	if (isdigit(*str)) {
-		io_tlb_nslabs = simple_strtoul(str, &str, 0);
+		mem->nslabs = simple_strtoul(str, &str, 0);
 		/* avoid tail segment of size < IO_TLB_SEGSIZE */
-		io_tlb_nslabs = ALIGN(io_tlb_nslabs, IO_TLB_SEGSIZE);
+		mem->nslabs = ALIGN(mem->nslabs, IO_TLB_SEGSIZE);
 	}
 	if (*str == ',')
 		++str;
@@ -125,7 +87,7 @@ setup_io_tlb_npages(char *str)
 		swiotlb_force = SWIOTLB_FORCE;
 	} else if (!strcmp(str, "noforce")) {
 		swiotlb_force = SWIOTLB_NO_FORCE;
-		io_tlb_nslabs = 1;
+		mem->nslabs = 1;
 	}
 
 	return 0;
@@ -136,7 +98,7 @@ static bool no_iotlb_memory;
 
 unsigned long swiotlb_nr_tbl(void)
 {
-	return unlikely(no_iotlb_memory) ? 0 : io_tlb_nslabs;
+	return unlikely(no_iotlb_memory) ? 0 : io_tlb_default_mem.nslabs;
 }
 EXPORT_SYMBOL_GPL(swiotlb_nr_tbl);
 
@@ -158,13 +120,14 @@ unsigned long swiotlb_size_or_default(void)
 {
 	unsigned long size;
 
-	size = io_tlb_nslabs << IO_TLB_SHIFT;
+	size = io_tlb_default_mem.nslabs << IO_TLB_SHIFT;
 
 	return size ? size : (IO_TLB_DEFAULT_SIZE);
 }
 
 void __init swiotlb_adjust_size(unsigned long new_size)
 {
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
 	unsigned long size;
 
 	/*
@@ -172,10 +135,10 @@ void __init swiotlb_adjust_size(unsigned long new_size)
 	 * architectures such as those supporting memory encryption to
 	 * adjust/expand SWIOTLB size for their use.
 	 */
-	if (!io_tlb_nslabs) {
+	if (!mem->nslabs) {
 		size = ALIGN(new_size, IO_TLB_SIZE);
-		io_tlb_nslabs = size >> IO_TLB_SHIFT;
-		io_tlb_nslabs = ALIGN(io_tlb_nslabs, IO_TLB_SEGSIZE);
+		mem->nslabs = size >> IO_TLB_SHIFT;
+		mem->nslabs = ALIGN(mem->nslabs, IO_TLB_SEGSIZE);
 
 		pr_info("SWIOTLB bounce buffer size adjusted to %luMB", size >> 20);
 	}
@@ -183,14 +146,15 @@ void __init swiotlb_adjust_size(unsigned long new_size)
 
 void swiotlb_print_info(void)
 {
-	unsigned long bytes = io_tlb_nslabs << IO_TLB_SHIFT;
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
+	unsigned long bytes = mem->nslabs << IO_TLB_SHIFT;
 
 	if (no_iotlb_memory) {
 		pr_warn("No low mem\n");
 		return;
 	}
 
-	pr_info("mapped [mem %pa-%pa] (%luMB)\n", &io_tlb_start, &io_tlb_end,
+	pr_info("mapped [mem %pa-%pa] (%luMB)\n", &mem->start, &mem->end,
 	       bytes >> 20);
 }
 
@@ -212,68 +176,71 @@ static inline unsigned long nr_slots(u64 val)
  */
 void __init swiotlb_update_mem_attributes(void)
 {
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
 	void *vaddr;
 	unsigned long bytes;
 
-	if (no_iotlb_memory || late_alloc)
+	if (no_iotlb_memory || mem->late_alloc)
 		return;
 
-	vaddr = phys_to_virt(io_tlb_start);
-	bytes = PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT);
+	vaddr = phys_to_virt(mem->start);
+	bytes = PAGE_ALIGN(mem->nslabs << IO_TLB_SHIFT);
 	set_memory_decrypted((unsigned long)vaddr, bytes >> PAGE_SHIFT);
 	memset(vaddr, 0, bytes);
 }
 
 int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
 {
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
 	unsigned long i, bytes;
 	size_t alloc_size;
 
 	/* protect against double initialization */
-	if (WARN_ON_ONCE(io_tlb_start))
+	if (WARN_ON_ONCE(mem->start))
 		return -ENOMEM;
 
 	bytes = nslabs << IO_TLB_SHIFT;
 
-	io_tlb_nslabs = nslabs;
-	io_tlb_start = __pa(tlb);
-	io_tlb_end = io_tlb_start + bytes;
+	mem->nslabs = nslabs;
+	mem->start = __pa(tlb);
+	mem->end = mem->start + bytes;
+	mem->index = 0;
+	spin_lock_init(&mem->lock);
 
 	/*
 	 * Allocate and initialize the free list array.  This array is used
 	 * to find contiguous free memory regions of size up to IO_TLB_SEGSIZE
-	 * between io_tlb_start and io_tlb_end.
+	 * between mem->start and mem->end.
 	 */
-	alloc_size = PAGE_ALIGN(io_tlb_nslabs * sizeof(int));
-	io_tlb_list = memblock_alloc(alloc_size, PAGE_SIZE);
-	if (!io_tlb_list)
+	alloc_size = PAGE_ALIGN(mem->nslabs * sizeof(int));
+	mem->list = memblock_alloc(alloc_size, PAGE_SIZE);
+	if (!mem->list)
 		panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
 		      __func__, alloc_size, PAGE_SIZE);
 
-	alloc_size = PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t));
-	io_tlb_orig_addr = memblock_alloc(alloc_size, PAGE_SIZE);
-	if (!io_tlb_orig_addr)
+	alloc_size = PAGE_ALIGN(mem->nslabs * sizeof(phys_addr_t));
+	mem->orig_addr = memblock_alloc(alloc_size, PAGE_SIZE);
+	if (!mem->orig_addr)
 		panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
 		      __func__, alloc_size, PAGE_SIZE);
 
-	alloc_size = PAGE_ALIGN(io_tlb_nslabs * sizeof(size_t));
-	io_tlb_alloc_size = memblock_alloc(alloc_size, PAGE_SIZE);
-	if (!io_tlb_alloc_size)
+	alloc_size = PAGE_ALIGN(mem->nslabs * sizeof(size_t));
+	mem->alloc_size = memblock_alloc(alloc_size, PAGE_SIZE);
+	if (mem->alloc_size)
 		panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
 		      __func__, alloc_size, PAGE_SIZE);
 
-	for (i = 0; i < io_tlb_nslabs; i++) {
-		io_tlb_list[i] = IO_TLB_SEGSIZE - io_tlb_offset(i);
-		io_tlb_orig_addr[i] = INVALID_PHYS_ADDR;
-		io_tlb_alloc_size[i] = 0;
+	for (i = 0; i < mem->nslabs; i++) {
+		mem->list[i] = IO_TLB_SEGSIZE - io_tlb_offset(i);
+		mem->orig_addr[i] = INVALID_PHYS_ADDR;
+		mem->alloc_size[i] = 0;
 	}
-	io_tlb_index = 0;
 	no_iotlb_memory = false;
 
 	if (verbose)
 		swiotlb_print_info();
 
-	swiotlb_set_max_segment(io_tlb_nslabs << IO_TLB_SHIFT);
+	swiotlb_set_max_segment(mem->nslabs << IO_TLB_SHIFT);
 	return 0;
 }
 
@@ -284,26 +251,27 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
 void  __init
 swiotlb_init(int verbose)
 {
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
 	size_t default_size = IO_TLB_DEFAULT_SIZE;
 	unsigned char *vstart;
 	unsigned long bytes;
 
-	if (!io_tlb_nslabs) {
-		io_tlb_nslabs = (default_size >> IO_TLB_SHIFT);
-		io_tlb_nslabs = ALIGN(io_tlb_nslabs, IO_TLB_SEGSIZE);
+	if (!mem->nslabs) {
+		mem->nslabs = (default_size >> IO_TLB_SHIFT);
+		mem->nslabs = ALIGN(mem->nslabs, IO_TLB_SEGSIZE);
 	}
 
-	bytes = io_tlb_nslabs << IO_TLB_SHIFT;
+	bytes = mem->nslabs << IO_TLB_SHIFT;
 
 	/* Get IO TLB memory from the low pages */
 	vstart = memblock_alloc_low(PAGE_ALIGN(bytes), PAGE_SIZE);
-	if (vstart && !swiotlb_init_with_tbl(vstart, io_tlb_nslabs, verbose))
+	if (vstart && !swiotlb_init_with_tbl(vstart, mem->nslabs, verbose))
 		return;
 
-	if (io_tlb_start) {
-		memblock_free_early(io_tlb_start,
-				    PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT));
-		io_tlb_start = 0;
+	if (mem->start) {
+		memblock_free_early(mem->start,
+				    PAGE_ALIGN(mem->nslabs << IO_TLB_SHIFT));
+		mem->start = 0;
 	}
 	pr_warn("Cannot allocate buffer");
 	no_iotlb_memory = true;
@@ -317,22 +285,23 @@ swiotlb_init(int verbose)
 int
 swiotlb_late_init_with_default_size(size_t default_size)
 {
-	unsigned long bytes, req_nslabs = io_tlb_nslabs;
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
+	unsigned long bytes, req_nslabs = mem->nslabs;
 	unsigned char *vstart = NULL;
 	unsigned int order;
 	int rc = 0;
 
-	if (!io_tlb_nslabs) {
-		io_tlb_nslabs = (default_size >> IO_TLB_SHIFT);
-		io_tlb_nslabs = ALIGN(io_tlb_nslabs, IO_TLB_SEGSIZE);
+	if (!mem->nslabs) {
+		mem->nslabs = (default_size >> IO_TLB_SHIFT);
+		mem->nslabs = ALIGN(mem->nslabs, IO_TLB_SEGSIZE);
 	}
 
 	/*
 	 * Get IO TLB memory from the low pages
 	 */
-	order = get_order(io_tlb_nslabs << IO_TLB_SHIFT);
-	io_tlb_nslabs = SLABS_PER_PAGE << order;
-	bytes = io_tlb_nslabs << IO_TLB_SHIFT;
+	order = get_order(mem->nslabs << IO_TLB_SHIFT);
+	mem->nslabs = SLABS_PER_PAGE << order;
+	bytes = mem->nslabs << IO_TLB_SHIFT;
 
 	while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) {
 		vstart = (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN,
@@ -343,15 +312,15 @@ swiotlb_late_init_with_default_size(size_t default_size)
 	}
 
 	if (!vstart) {
-		io_tlb_nslabs = req_nslabs;
+		mem->nslabs = req_nslabs;
 		return -ENOMEM;
 	}
 	if (order != get_order(bytes)) {
 		pr_warn("only able to allocate %ld MB\n",
 			(PAGE_SIZE << order) >> 20);
-		io_tlb_nslabs = SLABS_PER_PAGE << order;
+		mem->nslabs = SLABS_PER_PAGE << order;
 	}
-	rc = swiotlb_late_init_with_tbl(vstart, io_tlb_nslabs);
+	rc = swiotlb_late_init_with_tbl(vstart, mem->nslabs);
 	if (rc)
 		free_pages((unsigned long)vstart, order);
 
@@ -360,26 +329,32 @@ swiotlb_late_init_with_default_size(size_t default_size)
 
 static void swiotlb_cleanup(void)
 {
-	io_tlb_end = 0;
-	io_tlb_start = 0;
-	io_tlb_nslabs = 0;
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
+
+	mem->end = 0;
+	mem->start = 0;
+	mem->nslabs = 0;
 	max_segment = 0;
 }
 
 int
 swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
 {
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
 	unsigned long i, bytes;
 
 	/* protect against double initialization */
-	if (WARN_ON_ONCE(io_tlb_start))
+	if (WARN_ON_ONCE(mem->start))
 		return -ENOMEM;
 
 	bytes = nslabs << IO_TLB_SHIFT;
 
-	io_tlb_nslabs = nslabs;
-	io_tlb_start = virt_to_phys(tlb);
-	io_tlb_end = io_tlb_start + bytes;
+	mem->nslabs = nslabs;
+	mem->start = virt_to_phys(tlb);
+	mem->end = mem->start + bytes;
+	mem->index = 0;
+	mem->late_alloc = 1;
+	spin_lock_init(&mem->lock);
 
 	set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT);
 	memset(tlb, 0, bytes);
@@ -387,52 +362,45 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
 	/*
 	 * Allocate and initialize the free list array.  This array is used
 	 * to find contiguous free memory regions of size up to IO_TLB_SEGSIZE
-	 * between io_tlb_start and io_tlb_end.
+	 * between mem->start and mem->end.
 	 */
-	io_tlb_list = (unsigned int *)__get_free_pages(GFP_KERNEL,
-				      get_order(io_tlb_nslabs * sizeof(int)));
-	if (!io_tlb_list)
+	mem->list = (unsigned int *)__get_free_pages(GFP_KERNEL,
+	                              get_order(mem->nslabs * sizeof(int)));
+	if (!mem->list)
 		goto cleanup3;
 
-	io_tlb_orig_addr = (phys_addr_t *)
+	mem->orig_addr = (phys_addr_t *)
 		__get_free_pages(GFP_KERNEL,
-				 get_order(io_tlb_nslabs *
+				 get_order(mem->nslabs *
 					   sizeof(phys_addr_t)));
-	if (!io_tlb_orig_addr)
+	if (!mem->orig_addr)
 		goto cleanup4;
 
-	io_tlb_alloc_size = (size_t *)
+	mem->alloc_size = (size_t *)
 		__get_free_pages(GFP_KERNEL,
-				 get_order(io_tlb_nslabs *
+				 get_order(mem->nslabs *
 					   sizeof(size_t)));
-	if (!io_tlb_alloc_size)
+	if (!mem->alloc_size)
 		goto cleanup5;
 
-
-	for (i = 0; i < io_tlb_nslabs; i++) {
-		io_tlb_list[i] = IO_TLB_SEGSIZE - io_tlb_offset(i);
-		io_tlb_orig_addr[i] = INVALID_PHYS_ADDR;
-		io_tlb_alloc_size[i] = 0;
+	for (i = 0; i < mem->nslabs; i++) {
+		mem->list[i] = IO_TLB_SEGSIZE - io_tlb_offset(i);
+		mem->orig_addr[i] = INVALID_PHYS_ADDR;
+		mem->alloc_size[i] = 0;
 	}
-	io_tlb_index = 0;
 	no_iotlb_memory = false;
 
 	swiotlb_print_info();
-
-	late_alloc = 1;
-
-	swiotlb_set_max_segment(io_tlb_nslabs << IO_TLB_SHIFT);
-
+	swiotlb_set_max_segment(mem->nslabs << IO_TLB_SHIFT);
 	return 0;
 
 cleanup5:
-	free_pages((unsigned long)io_tlb_orig_addr, get_order(io_tlb_nslabs *
-							      sizeof(phys_addr_t)));
-
+	free_pages((unsigned long)mem->orig_addr,
+		   get_order(mem->nslabs * sizeof(phys_addr_t)));
 cleanup4:
-	free_pages((unsigned long)io_tlb_list, get_order(io_tlb_nslabs *
-	                                                 sizeof(int)));
-	io_tlb_list = NULL;
+	free_pages((unsigned long)mem->list,
+		   get_order(mem->nslabs * sizeof(int)));
+	mem->list = NULL;
 cleanup3:
 	swiotlb_cleanup();
 	return -ENOMEM;
@@ -440,27 +408,29 @@ cleanup3:
 
 void __init swiotlb_exit(void)
 {
-	if (!io_tlb_orig_addr)
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
+
+	if (!mem->orig_addr)
 		return;
 
-	if (late_alloc) {
-		free_pages((unsigned long)io_tlb_alloc_size,
-			   get_order(io_tlb_nslabs * sizeof(size_t)));
-		free_pages((unsigned long)io_tlb_orig_addr,
-			   get_order(io_tlb_nslabs * sizeof(phys_addr_t)));
-		free_pages((unsigned long)io_tlb_list, get_order(io_tlb_nslabs *
-								 sizeof(int)));
-		free_pages((unsigned long)phys_to_virt(io_tlb_start),
-			   get_order(io_tlb_nslabs << IO_TLB_SHIFT));
+	if (mem->late_alloc) {
+		free_pages((unsigned long)mem->alloc_size,
+			   get_order(mem->nslabs * sizeof(size_t)));
+		free_pages((unsigned long)mem->orig_addr,
+			   get_order(mem->nslabs * sizeof(phys_addr_t)));
+		free_pages((unsigned long)mem->list,
+			   get_order(mem->nslabs * sizeof(int)));
+		free_pages((unsigned long)phys_to_virt(mem->start),
+			   get_order(mem->nslabs << IO_TLB_SHIFT));
 	} else {
-		memblock_free_late(__pa(io_tlb_orig_addr),
-				   PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t)));
-		memblock_free_late(__pa(io_tlb_alloc_size),
-				   PAGE_ALIGN(io_tlb_nslabs * sizeof(size_t)));
-		memblock_free_late(__pa(io_tlb_list),
-				   PAGE_ALIGN(io_tlb_nslabs * sizeof(int)));
-		memblock_free_late(io_tlb_start,
-				   PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT));
+		memblock_free_late(__pa(mem->alloc_size),
+				   PAGE_ALIGN(mem->nslabs * sizeof(size_t)));
+		memblock_free_late(__pa(mem->orig_addr),
+				   PAGE_ALIGN(mem->nslabs * sizeof(phys_addr_t)));
+		memblock_free_late(__pa(mem->list),
+				   PAGE_ALIGN(mem->nslabs * sizeof(int)));
+		memblock_free_late(mem->start,
+				   PAGE_ALIGN(mem->nslabs << IO_TLB_SHIFT));
 	}
 	swiotlb_cleanup();
 }
@@ -471,9 +441,10 @@ void __init swiotlb_exit(void)
 static void swiotlb_bounce(struct device *dev, phys_addr_t tlb_addr, size_t size,
 			   enum dma_data_direction dir)
 {
-	int index = (tlb_addr - io_tlb_start) >> IO_TLB_SHIFT;
-	size_t alloc_size = io_tlb_alloc_size[index];
-	phys_addr_t orig_addr = io_tlb_orig_addr[index];
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
+	int index = (tlb_addr - mem->start) >> IO_TLB_SHIFT;
+	phys_addr_t orig_addr = mem->orig_addr[index];
+	size_t alloc_size = mem->alloc_size[index];
 	unsigned long pfn = PFN_DOWN(orig_addr);
 	unsigned char *vaddr = phys_to_virt(tlb_addr);
 
@@ -538,9 +509,9 @@ static inline unsigned long get_max_slots(unsigned long boundary_mask)
 	return nr_slots(boundary_mask + 1);
 }
 
-static unsigned int wrap_index(unsigned int index)
+static unsigned int wrap_index(struct io_tlb_mem *mem, unsigned int index)
 {
-	if (index >= io_tlb_nslabs)
+	if (index >= mem->nslabs)
 		return 0;
 	return index;
 }
@@ -552,9 +523,10 @@ static unsigned int wrap_index(unsigned int index)
 static int find_slots(struct device *dev, phys_addr_t orig_addr,
 		size_t alloc_size)
 {
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
 	unsigned long boundary_mask = dma_get_seg_boundary(dev);
 	dma_addr_t tbl_dma_addr =
-		phys_to_dma_unencrypted(dev, io_tlb_start) & boundary_mask;
+		phys_to_dma_unencrypted(dev, mem->start) & boundary_mask;
 	unsigned long max_slots = get_max_slots(boundary_mask);
 	unsigned int iotlb_align_mask =
 		dma_get_min_align_mask(dev) & ~(IO_TLB_SIZE - 1);
@@ -573,15 +545,15 @@ static int find_slots(struct device *dev, phys_addr_t orig_addr,
 	if (alloc_size >= PAGE_SIZE)
 		stride = max(stride, stride << (PAGE_SHIFT - IO_TLB_SHIFT));
 
-	spin_lock_irqsave(&io_tlb_lock, flags);
-	if (unlikely(nslots > io_tlb_nslabs - io_tlb_used))
+	spin_lock_irqsave(&mem->lock, flags);
+	if (unlikely(nslots > mem->nslabs - mem->used))
 		goto not_found;
 
-	index = wrap = wrap_index(ALIGN(io_tlb_index, stride));
+	index = wrap = wrap_index(mem, ALIGN(mem->index, stride));
 	do {
 		if ((slot_addr(tbl_dma_addr, index) & iotlb_align_mask) !=
 		    (orig_addr & iotlb_align_mask)) {
-			index = wrap_index(index + 1);
+			index = wrap_index(mem, index + 1);
 			continue;
 		}
 
@@ -593,34 +565,34 @@ static int find_slots(struct device *dev, phys_addr_t orig_addr,
 		if (!iommu_is_span_boundary(index, nslots,
 					    nr_slots(tbl_dma_addr),
 					    max_slots)) {
-			if (io_tlb_list[index] >= nslots)
+			if (mem->list[index] >= nslots)
 				goto found;
 		}
-		index = wrap_index(index + stride);
+		index = wrap_index(mem, index + stride);
 	} while (index != wrap);
 
 not_found:
-	spin_unlock_irqrestore(&io_tlb_lock, flags);
+	spin_unlock_irqrestore(&mem->lock, flags);
 	return -1;
 
 found:
 	for (i = index; i < index + nslots; i++)
-		io_tlb_list[i] = 0;
+		mem->list[i] = 0;
 	for (i = index - 1;
 	     io_tlb_offset(i) != IO_TLB_SEGSIZE - 1 &&
-	     io_tlb_list[i]; i--)
-		io_tlb_list[i] = ++count;
+	     mem->list[i]; i--)
+		mem->list[i] = ++count;
 
 	/*
 	 * Update the indices to avoid searching in the next round.
 	 */
-	if (index + nslots < io_tlb_nslabs)
-		io_tlb_index = index + nslots;
+	if (index + nslots < mem->nslabs)
+		mem->index = index + nslots;
 	else
-		io_tlb_index = 0;
-	io_tlb_used += nslots;
+		mem->index = 0;
+	mem->used += nslots;
 
-	spin_unlock_irqrestore(&io_tlb_lock, flags);
+	spin_unlock_irqrestore(&mem->lock, flags);
 	return index;
 }
 
@@ -628,6 +600,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
 		size_t mapping_size, size_t alloc_size,
 		enum dma_data_direction dir, unsigned long attrs)
 {
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
 	unsigned int offset = swiotlb_align_offset(dev, orig_addr);
 	unsigned int index, i;
 	phys_addr_t tlb_addr;
@@ -649,7 +622,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
 		if (!(attrs & DMA_ATTR_NO_WARN))
 			dev_warn_ratelimited(dev,
 	"swiotlb buffer is full (sz: %zd bytes), total %lu (slots), used %lu (slots)\n",
-				 alloc_size, io_tlb_nslabs, io_tlb_used);
+				 alloc_size, mem->nslabs, mem->used);
 		return (phys_addr_t)DMA_MAPPING_ERROR;
 	}
 
@@ -659,10 +632,10 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
 	 * needed.
 	 */
 	for (i = 0; i < nr_slots(alloc_size + offset); i++) {
-		io_tlb_orig_addr[index + i] = slot_addr(orig_addr, i);
-		io_tlb_alloc_size[index+i] = alloc_size - (i << IO_TLB_SHIFT);
+		mem->orig_addr[index + i] = slot_addr(orig_addr, i);
+		mem->alloc_size[index + i] = alloc_size - (i << IO_TLB_SHIFT);
 	}
-	tlb_addr = slot_addr(io_tlb_start, index) + offset;
+	tlb_addr = slot_addr(mem->start, index) + offset;
 	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
 	    (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL))
 		swiotlb_bounce(dev, tlb_addr, mapping_size, DMA_TO_DEVICE);
@@ -676,10 +649,11 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 			      size_t mapping_size, enum dma_data_direction dir,
 			      unsigned long attrs)
 {
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
 	unsigned long flags;
 	unsigned int offset = swiotlb_align_offset(hwdev, tlb_addr);
-	int index = (tlb_addr - offset - io_tlb_start) >> IO_TLB_SHIFT;
-	int nslots = nr_slots(io_tlb_alloc_size[index] + offset);
+	int index = (tlb_addr - offset - mem->start) >> IO_TLB_SHIFT;
+	int nslots = nr_slots(mem->alloc_size[index] + offset);
 	int count, i;
 
 	/*
@@ -695,9 +669,9 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 	 * While returning the entries to the free list, we merge the entries
 	 * with slots below and above the pool being returned.
 	 */
-	spin_lock_irqsave(&io_tlb_lock, flags);
+	spin_lock_irqsave(&mem->lock, flags);
 	if (index + nslots < ALIGN(index + 1, IO_TLB_SEGSIZE))
-		count = io_tlb_list[index + nslots];
+		count = mem->list[index + nslots];
 	else
 		count = 0;
 
@@ -706,9 +680,9 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 	 * superceeding slots
 	 */
 	for (i = index + nslots - 1; i >= index; i--) {
-		io_tlb_list[i] = ++count;
-		io_tlb_orig_addr[i] = INVALID_PHYS_ADDR;
-		io_tlb_alloc_size[i] = 0;
+		mem->list[i] = ++count;
+		mem->orig_addr[i] = INVALID_PHYS_ADDR;
+		mem->alloc_size[i] = 0;
 	}
 
 	/*
@@ -716,11 +690,11 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 	 * available (non zero)
 	 */
 	for (i = index - 1;
-	     io_tlb_offset(i) != IO_TLB_SEGSIZE - 1 && io_tlb_list[i];
+	     io_tlb_offset(i) != IO_TLB_SEGSIZE - 1 && mem->list[i];
 	     i--)
-		io_tlb_list[i] = ++count;
-	io_tlb_used -= nslots;
-	spin_unlock_irqrestore(&io_tlb_lock, flags);
+		mem->list[i] = ++count;
+	mem->used -= nslots;
+	spin_unlock_irqrestore(&mem->lock, flags);
 }
 
 void swiotlb_sync_single_for_device(struct device *dev, phys_addr_t tlb_addr,
@@ -783,21 +757,21 @@ size_t swiotlb_max_mapping_size(struct device *dev)
 bool is_swiotlb_active(void)
 {
 	/*
-	 * When SWIOTLB is initialized, even if io_tlb_start points to physical
-	 * address zero, io_tlb_end surely doesn't.
+	 * When SWIOTLB is initialized, even if mem->start points to physical
+	 * address zero, mem->end surely doesn't.
 	 */
-	return io_tlb_end != 0;
+	return io_tlb_default_mem.end != 0;
 }
 
 #ifdef CONFIG_DEBUG_FS
 
 static int __init swiotlb_create_debugfs(void)
 {
-	struct dentry *root;
+	struct io_tlb_mem *mem = &io_tlb_default_mem;
 
-	root = debugfs_create_dir("swiotlb", NULL);
-	debugfs_create_ulong("io_tlb_nslabs", 0400, root, &io_tlb_nslabs);
-	debugfs_create_ulong("io_tlb_used", 0400, root, &io_tlb_used);
+	mem->debugfs = debugfs_create_dir("swiotlb", NULL);
+	debugfs_create_ulong("io_tlb_nslabs", 0400, mem->debugfs, &mem->nslabs);
+	debugfs_create_ulong("io_tlb_used", 0400, mem->debugfs, &mem->used);
 	return 0;
 }
 
-- 
cgit v1.2.3


From 2d29960af0bee8cc6731b9bd3964850c9e7a6840 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Thu, 18 Mar 2021 17:14:23 +0100
Subject: swiotlb: dynamically allocate io_tlb_default_mem

Instead of allocating ->list and ->orig_addr separately just do one
dynamic allocation for the actual io_tlb_mem structure.  This simplifies
a lot of the initialization code, and also allows to just check
io_tlb_default_mem to see if swiotlb is in use.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/xen/swiotlb-xen.c |  22 ++--
 include/linux/swiotlb.h   |  18 +--
 kernel/dma/swiotlb.c      | 306 +++++++++++++++-------------------------------
 3 files changed, 117 insertions(+), 229 deletions(-)

(limited to 'drivers')

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 5329ad54a5f3..4c89afc0df62 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -158,17 +158,14 @@ static const char *xen_swiotlb_error(enum xen_swiotlb_err err)
 int __ref xen_swiotlb_init(void)
 {
 	enum xen_swiotlb_err m_ret = XEN_SWIOTLB_UNKNOWN;
-	unsigned long nslabs, bytes, order;
-	unsigned int repeat = 3;
+	unsigned long bytes = swiotlb_size_or_default();
+	unsigned long nslabs = bytes >> IO_TLB_SHIFT;
+	unsigned int order, repeat = 3;
 	int rc = -ENOMEM;
 	char *start;
 
-	nslabs = swiotlb_nr_tbl();
-	if (!nslabs)
-		nslabs = DEFAULT_NSLABS;
 retry:
 	m_ret = XEN_SWIOTLB_ENOMEM;
-	bytes = nslabs << IO_TLB_SHIFT;
 	order = get_order(bytes);
 
 	/*
@@ -221,19 +218,16 @@ error:
 #ifdef CONFIG_X86
 void __init xen_swiotlb_init_early(void)
 {
-	unsigned long nslabs, bytes;
+	unsigned long bytes = swiotlb_size_or_default();
+	unsigned long nslabs = bytes >> IO_TLB_SHIFT;
 	unsigned int repeat = 3;
 	char *start;
 	int rc;
 
-	nslabs = swiotlb_nr_tbl();
-	if (!nslabs)
-		nslabs = DEFAULT_NSLABS;
 retry:
 	/*
 	 * Get IO TLB memory from any location.
 	 */
-	bytes = nslabs << IO_TLB_SHIFT;
 	start = memblock_alloc(PAGE_ALIGN(bytes), PAGE_SIZE);
 	if (!start)
 		panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
@@ -248,8 +242,8 @@ retry:
 		if (repeat--) {
 			/* Min is 2MB */
 			nslabs = max(1024UL, (nslabs >> 1));
-			pr_info("Lowering to %luMB\n",
-				(nslabs << IO_TLB_SHIFT) >> 20);
+			bytes = nslabs << IO_TLB_SHIFT;
+			pr_info("Lowering to %luMB\n", bytes >> 20);
 			goto retry;
 		}
 		panic("%s (rc:%d)", xen_swiotlb_error(XEN_SWIOTLB_EFIXUP), rc);
@@ -548,7 +542,7 @@ xen_swiotlb_sync_sg_for_device(struct device *dev, struct scatterlist *sgl,
 static int
 xen_swiotlb_dma_supported(struct device *hwdev, u64 mask)
 {
-	return xen_phys_to_dma(hwdev, io_tlb_default_mem.end - 1) <= mask;
+	return xen_phys_to_dma(hwdev, io_tlb_default_mem->end - 1) <= mask;
 }
 
 const struct dma_map_ops xen_swiotlb_dma_ops = {
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 5ec5378b17c3..63f7a63f61d0 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -90,28 +90,30 @@ struct io_tlb_mem {
 	phys_addr_t end;
 	unsigned long nslabs;
 	unsigned long used;
-	unsigned int *list;
 	unsigned int index;
-	phys_addr_t *orig_addr;
-	size_t *alloc_size;
 	spinlock_t lock;
 	struct dentry *debugfs;
 	bool late_alloc;
+	struct io_tlb_slot {
+		phys_addr_t orig_addr;
+		size_t alloc_size;
+		unsigned int list;
+	} slots[];
 };
-extern struct io_tlb_mem io_tlb_default_mem;
+extern struct io_tlb_mem *io_tlb_default_mem;
 
 static inline bool is_swiotlb_buffer(phys_addr_t paddr)
 {
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
+	struct io_tlb_mem *mem = io_tlb_default_mem;
 
-	return paddr >= mem->start && paddr < mem->end;
+	return mem && paddr >= mem->start && paddr < mem->end;
 }
 
 void __init swiotlb_exit(void);
 unsigned int swiotlb_max_segment(void);
 size_t swiotlb_max_mapping_size(struct device *dev);
 bool is_swiotlb_active(void);
-void __init swiotlb_adjust_size(unsigned long new_size);
+void __init swiotlb_adjust_size(unsigned long size);
 #else
 #define swiotlb_force SWIOTLB_NO_FORCE
 static inline bool is_swiotlb_buffer(phys_addr_t paddr)
@@ -135,7 +137,7 @@ static inline bool is_swiotlb_active(void)
 	return false;
 }
 
-static inline void swiotlb_adjust_size(unsigned long new_size)
+static inline void swiotlb_adjust_size(unsigned long size)
 {
 }
 #endif /* CONFIG_SWIOTLB */
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index d9c097f0f78c..13de669a9b46 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -63,7 +63,7 @@
 
 enum swiotlb_force swiotlb_force;
 
-struct io_tlb_mem io_tlb_default_mem;
+struct io_tlb_mem *io_tlb_default_mem;
 
 /*
  * Max segment that we can provide which (if pages are contingous) will
@@ -71,15 +71,15 @@ struct io_tlb_mem io_tlb_default_mem;
  */
 static unsigned int max_segment;
 
+static unsigned long default_nslabs = IO_TLB_DEFAULT_SIZE >> IO_TLB_SHIFT;
+
 static int __init
 setup_io_tlb_npages(char *str)
 {
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
-
 	if (isdigit(*str)) {
-		mem->nslabs = simple_strtoul(str, &str, 0);
 		/* avoid tail segment of size < IO_TLB_SEGSIZE */
-		mem->nslabs = ALIGN(mem->nslabs, IO_TLB_SEGSIZE);
+		default_nslabs =
+			ALIGN(simple_strtoul(str, &str, 0), IO_TLB_SEGSIZE);
 	}
 	if (*str == ',')
 		++str;
@@ -87,24 +87,22 @@ setup_io_tlb_npages(char *str)
 		swiotlb_force = SWIOTLB_FORCE;
 	} else if (!strcmp(str, "noforce")) {
 		swiotlb_force = SWIOTLB_NO_FORCE;
-		mem->nslabs = 1;
+		default_nslabs = 1;
 	}
 
 	return 0;
 }
 early_param("swiotlb", setup_io_tlb_npages);
 
-static bool no_iotlb_memory;
-
 unsigned long swiotlb_nr_tbl(void)
 {
-	return unlikely(no_iotlb_memory) ? 0 : io_tlb_default_mem.nslabs;
+	return io_tlb_default_mem ? io_tlb_default_mem->nslabs : 0;
 }
 EXPORT_SYMBOL_GPL(swiotlb_nr_tbl);
 
 unsigned int swiotlb_max_segment(void)
 {
-	return unlikely(no_iotlb_memory) ? 0 : max_segment;
+	return io_tlb_default_mem ? max_segment : 0;
 }
 EXPORT_SYMBOL_GPL(swiotlb_max_segment);
 
@@ -118,44 +116,32 @@ void swiotlb_set_max_segment(unsigned int val)
 
 unsigned long swiotlb_size_or_default(void)
 {
-	unsigned long size;
-
-	size = io_tlb_default_mem.nslabs << IO_TLB_SHIFT;
-
-	return size ? size : (IO_TLB_DEFAULT_SIZE);
+	return default_nslabs << IO_TLB_SHIFT;
 }
 
-void __init swiotlb_adjust_size(unsigned long new_size)
+void __init swiotlb_adjust_size(unsigned long size)
 {
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
-	unsigned long size;
-
 	/*
 	 * If swiotlb parameter has not been specified, give a chance to
 	 * architectures such as those supporting memory encryption to
 	 * adjust/expand SWIOTLB size for their use.
 	 */
-	if (!mem->nslabs) {
-		size = ALIGN(new_size, IO_TLB_SIZE);
-		mem->nslabs = size >> IO_TLB_SHIFT;
-		mem->nslabs = ALIGN(mem->nslabs, IO_TLB_SEGSIZE);
-
-		pr_info("SWIOTLB bounce buffer size adjusted to %luMB", size >> 20);
-	}
+	size = ALIGN(size, IO_TLB_SIZE);
+	default_nslabs = ALIGN(size >> IO_TLB_SHIFT, IO_TLB_SEGSIZE);
+	pr_info("SWIOTLB bounce buffer size adjusted to %luMB", size >> 20);
 }
 
 void swiotlb_print_info(void)
 {
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
-	unsigned long bytes = mem->nslabs << IO_TLB_SHIFT;
+	struct io_tlb_mem *mem = io_tlb_default_mem;
 
-	if (no_iotlb_memory) {
+	if (!mem) {
 		pr_warn("No low mem\n");
 		return;
 	}
 
 	pr_info("mapped [mem %pa-%pa] (%luMB)\n", &mem->start, &mem->end,
-	       bytes >> 20);
+	       (mem->nslabs << IO_TLB_SHIFT) >> 20);
 }
 
 static inline unsigned long io_tlb_offset(unsigned long val)
@@ -176,13 +162,12 @@ static inline unsigned long nr_slots(u64 val)
  */
 void __init swiotlb_update_mem_attributes(void)
 {
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
+	struct io_tlb_mem *mem = io_tlb_default_mem;
 	void *vaddr;
 	unsigned long bytes;
 
-	if (no_iotlb_memory || mem->late_alloc)
+	if (!mem || mem->late_alloc)
 		return;
-
 	vaddr = phys_to_virt(mem->start);
 	bytes = PAGE_ALIGN(mem->nslabs << IO_TLB_SHIFT);
 	set_memory_decrypted((unsigned long)vaddr, bytes >> PAGE_SHIFT);
@@ -191,55 +176,33 @@ void __init swiotlb_update_mem_attributes(void)
 
 int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
 {
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
-	unsigned long i, bytes;
+	unsigned long bytes = nslabs << IO_TLB_SHIFT, i;
+	struct io_tlb_mem *mem;
 	size_t alloc_size;
 
 	/* protect against double initialization */
-	if (WARN_ON_ONCE(mem->start))
+	if (WARN_ON_ONCE(io_tlb_default_mem))
 		return -ENOMEM;
 
-	bytes = nslabs << IO_TLB_SHIFT;
-
+	alloc_size = PAGE_ALIGN(struct_size(mem, slots, nslabs));
+	mem = memblock_alloc(alloc_size, PAGE_SIZE);
+	if (!mem)
+		panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
+		      __func__, alloc_size, PAGE_SIZE);
 	mem->nslabs = nslabs;
 	mem->start = __pa(tlb);
 	mem->end = mem->start + bytes;
 	mem->index = 0;
 	spin_lock_init(&mem->lock);
-
-	/*
-	 * Allocate and initialize the free list array.  This array is used
-	 * to find contiguous free memory regions of size up to IO_TLB_SEGSIZE
-	 * between mem->start and mem->end.
-	 */
-	alloc_size = PAGE_ALIGN(mem->nslabs * sizeof(int));
-	mem->list = memblock_alloc(alloc_size, PAGE_SIZE);
-	if (!mem->list)
-		panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
-		      __func__, alloc_size, PAGE_SIZE);
-
-	alloc_size = PAGE_ALIGN(mem->nslabs * sizeof(phys_addr_t));
-	mem->orig_addr = memblock_alloc(alloc_size, PAGE_SIZE);
-	if (!mem->orig_addr)
-		panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
-		      __func__, alloc_size, PAGE_SIZE);
-
-	alloc_size = PAGE_ALIGN(mem->nslabs * sizeof(size_t));
-	mem->alloc_size = memblock_alloc(alloc_size, PAGE_SIZE);
-	if (mem->alloc_size)
-		panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
-		      __func__, alloc_size, PAGE_SIZE);
-
 	for (i = 0; i < mem->nslabs; i++) {
-		mem->list[i] = IO_TLB_SEGSIZE - io_tlb_offset(i);
-		mem->orig_addr[i] = INVALID_PHYS_ADDR;
-		mem->alloc_size[i] = 0;
+		mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i);
+		mem->slots[i].orig_addr = INVALID_PHYS_ADDR;
+		mem->slots[i].alloc_size = 0;
 	}
-	no_iotlb_memory = false;
 
+	io_tlb_default_mem = mem;
 	if (verbose)
 		swiotlb_print_info();
-
 	swiotlb_set_max_segment(mem->nslabs << IO_TLB_SHIFT);
 	return 0;
 }
@@ -251,30 +214,21 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
 void  __init
 swiotlb_init(int verbose)
 {
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
-	size_t default_size = IO_TLB_DEFAULT_SIZE;
-	unsigned char *vstart;
-	unsigned long bytes;
-
-	if (!mem->nslabs) {
-		mem->nslabs = (default_size >> IO_TLB_SHIFT);
-		mem->nslabs = ALIGN(mem->nslabs, IO_TLB_SEGSIZE);
-	}
-
-	bytes = mem->nslabs << IO_TLB_SHIFT;
+	size_t bytes = PAGE_ALIGN(default_nslabs << IO_TLB_SHIFT);
+	void *tlb;
 
 	/* Get IO TLB memory from the low pages */
-	vstart = memblock_alloc_low(PAGE_ALIGN(bytes), PAGE_SIZE);
-	if (vstart && !swiotlb_init_with_tbl(vstart, mem->nslabs, verbose))
-		return;
-
-	if (mem->start) {
-		memblock_free_early(mem->start,
-				    PAGE_ALIGN(mem->nslabs << IO_TLB_SHIFT));
-		mem->start = 0;
-	}
+	tlb = memblock_alloc_low(bytes, PAGE_SIZE);
+	if (!tlb)
+		goto fail;
+	if (swiotlb_init_with_tbl(tlb, default_nslabs, verbose))
+		goto fail_free_mem;
+	return;
+
+fail_free_mem:
+	memblock_free_early(__pa(tlb), bytes);
+fail:
 	pr_warn("Cannot allocate buffer");
-	no_iotlb_memory = true;
 }
 
 /*
@@ -285,23 +239,19 @@ swiotlb_init(int verbose)
 int
 swiotlb_late_init_with_default_size(size_t default_size)
 {
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
-	unsigned long bytes, req_nslabs = mem->nslabs;
+	unsigned long nslabs =
+		ALIGN(default_size >> IO_TLB_SHIFT, IO_TLB_SEGSIZE);
+	unsigned long bytes;
 	unsigned char *vstart = NULL;
 	unsigned int order;
 	int rc = 0;
 
-	if (!mem->nslabs) {
-		mem->nslabs = (default_size >> IO_TLB_SHIFT);
-		mem->nslabs = ALIGN(mem->nslabs, IO_TLB_SEGSIZE);
-	}
-
 	/*
 	 * Get IO TLB memory from the low pages
 	 */
-	order = get_order(mem->nslabs << IO_TLB_SHIFT);
-	mem->nslabs = SLABS_PER_PAGE << order;
-	bytes = mem->nslabs << IO_TLB_SHIFT;
+	order = get_order(nslabs << IO_TLB_SHIFT);
+	nslabs = SLABS_PER_PAGE << order;
+	bytes = nslabs << IO_TLB_SHIFT;
 
 	while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) {
 		vstart = (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN,
@@ -311,43 +261,35 @@ swiotlb_late_init_with_default_size(size_t default_size)
 		order--;
 	}
 
-	if (!vstart) {
-		mem->nslabs = req_nslabs;
+	if (!vstart)
 		return -ENOMEM;
-	}
+
 	if (order != get_order(bytes)) {
 		pr_warn("only able to allocate %ld MB\n",
 			(PAGE_SIZE << order) >> 20);
-		mem->nslabs = SLABS_PER_PAGE << order;
+		nslabs = SLABS_PER_PAGE << order;
 	}
-	rc = swiotlb_late_init_with_tbl(vstart, mem->nslabs);
+	rc = swiotlb_late_init_with_tbl(vstart, nslabs);
 	if (rc)
 		free_pages((unsigned long)vstart, order);
 
 	return rc;
 }
 
-static void swiotlb_cleanup(void)
-{
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
-
-	mem->end = 0;
-	mem->start = 0;
-	mem->nslabs = 0;
-	max_segment = 0;
-}
-
 int
 swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
 {
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
-	unsigned long i, bytes;
+	unsigned long bytes = nslabs << IO_TLB_SHIFT, i;
+	struct io_tlb_mem *mem;
 
 	/* protect against double initialization */
-	if (WARN_ON_ONCE(mem->start))
+	if (WARN_ON_ONCE(io_tlb_default_mem))
 		return -ENOMEM;
 
-	bytes = nslabs << IO_TLB_SHIFT;
+	mem = (void *)__get_free_pages(GFP_KERNEL,
+		get_order(struct_size(mem, slots, nslabs)));
+	if (!mem)
+		return -ENOMEM;
 
 	mem->nslabs = nslabs;
 	mem->start = virt_to_phys(tlb);
@@ -355,84 +297,35 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
 	mem->index = 0;
 	mem->late_alloc = 1;
 	spin_lock_init(&mem->lock);
+	for (i = 0; i < mem->nslabs; i++) {
+		mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i);
+		mem->slots[i].orig_addr = INVALID_PHYS_ADDR;
+		mem->slots[i].alloc_size = 0;
+	}
 
 	set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT);
 	memset(tlb, 0, bytes);
 
-	/*
-	 * Allocate and initialize the free list array.  This array is used
-	 * to find contiguous free memory regions of size up to IO_TLB_SEGSIZE
-	 * between mem->start and mem->end.
-	 */
-	mem->list = (unsigned int *)__get_free_pages(GFP_KERNEL,
-	                              get_order(mem->nslabs * sizeof(int)));
-	if (!mem->list)
-		goto cleanup3;
-
-	mem->orig_addr = (phys_addr_t *)
-		__get_free_pages(GFP_KERNEL,
-				 get_order(mem->nslabs *
-					   sizeof(phys_addr_t)));
-	if (!mem->orig_addr)
-		goto cleanup4;
-
-	mem->alloc_size = (size_t *)
-		__get_free_pages(GFP_KERNEL,
-				 get_order(mem->nslabs *
-					   sizeof(size_t)));
-	if (!mem->alloc_size)
-		goto cleanup5;
-
-	for (i = 0; i < mem->nslabs; i++) {
-		mem->list[i] = IO_TLB_SEGSIZE - io_tlb_offset(i);
-		mem->orig_addr[i] = INVALID_PHYS_ADDR;
-		mem->alloc_size[i] = 0;
-	}
-	no_iotlb_memory = false;
-
+	io_tlb_default_mem = mem;
 	swiotlb_print_info();
 	swiotlb_set_max_segment(mem->nslabs << IO_TLB_SHIFT);
 	return 0;
-
-cleanup5:
-	free_pages((unsigned long)mem->orig_addr,
-		   get_order(mem->nslabs * sizeof(phys_addr_t)));
-cleanup4:
-	free_pages((unsigned long)mem->list,
-		   get_order(mem->nslabs * sizeof(int)));
-	mem->list = NULL;
-cleanup3:
-	swiotlb_cleanup();
-	return -ENOMEM;
 }
 
 void __init swiotlb_exit(void)
 {
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
+	struct io_tlb_mem *mem = io_tlb_default_mem;
+	size_t size;
 
-	if (!mem->orig_addr)
+	if (!mem)
 		return;
 
-	if (mem->late_alloc) {
-		free_pages((unsigned long)mem->alloc_size,
-			   get_order(mem->nslabs * sizeof(size_t)));
-		free_pages((unsigned long)mem->orig_addr,
-			   get_order(mem->nslabs * sizeof(phys_addr_t)));
-		free_pages((unsigned long)mem->list,
-			   get_order(mem->nslabs * sizeof(int)));
-		free_pages((unsigned long)phys_to_virt(mem->start),
-			   get_order(mem->nslabs << IO_TLB_SHIFT));
-	} else {
-		memblock_free_late(__pa(mem->alloc_size),
-				   PAGE_ALIGN(mem->nslabs * sizeof(size_t)));
-		memblock_free_late(__pa(mem->orig_addr),
-				   PAGE_ALIGN(mem->nslabs * sizeof(phys_addr_t)));
-		memblock_free_late(__pa(mem->list),
-				   PAGE_ALIGN(mem->nslabs * sizeof(int)));
-		memblock_free_late(mem->start,
-				   PAGE_ALIGN(mem->nslabs << IO_TLB_SHIFT));
-	}
-	swiotlb_cleanup();
+	size = struct_size(mem, slots, mem->nslabs);
+	if (mem->late_alloc)
+		free_pages((unsigned long)mem, get_order(size));
+	else
+		memblock_free_late(__pa(mem), PAGE_ALIGN(size));
+	io_tlb_default_mem = NULL;
 }
 
 /*
@@ -441,10 +334,10 @@ void __init swiotlb_exit(void)
 static void swiotlb_bounce(struct device *dev, phys_addr_t tlb_addr, size_t size,
 			   enum dma_data_direction dir)
 {
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
+	struct io_tlb_mem *mem = io_tlb_default_mem;
 	int index = (tlb_addr - mem->start) >> IO_TLB_SHIFT;
-	phys_addr_t orig_addr = mem->orig_addr[index];
-	size_t alloc_size = mem->alloc_size[index];
+	phys_addr_t orig_addr = mem->slots[index].orig_addr;
+	size_t alloc_size = mem->slots[index].alloc_size;
 	unsigned long pfn = PFN_DOWN(orig_addr);
 	unsigned char *vaddr = phys_to_virt(tlb_addr);
 
@@ -523,7 +416,7 @@ static unsigned int wrap_index(struct io_tlb_mem *mem, unsigned int index)
 static int find_slots(struct device *dev, phys_addr_t orig_addr,
 		size_t alloc_size)
 {
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
+	struct io_tlb_mem *mem = io_tlb_default_mem;
 	unsigned long boundary_mask = dma_get_seg_boundary(dev);
 	dma_addr_t tbl_dma_addr =
 		phys_to_dma_unencrypted(dev, mem->start) & boundary_mask;
@@ -565,7 +458,7 @@ static int find_slots(struct device *dev, phys_addr_t orig_addr,
 		if (!iommu_is_span_boundary(index, nslots,
 					    nr_slots(tbl_dma_addr),
 					    max_slots)) {
-			if (mem->list[index] >= nslots)
+			if (mem->slots[index].list >= nslots)
 				goto found;
 		}
 		index = wrap_index(mem, index + stride);
@@ -577,11 +470,11 @@ not_found:
 
 found:
 	for (i = index; i < index + nslots; i++)
-		mem->list[i] = 0;
+		mem->slots[i].list = 0;
 	for (i = index - 1;
 	     io_tlb_offset(i) != IO_TLB_SEGSIZE - 1 &&
-	     mem->list[i]; i--)
-		mem->list[i] = ++count;
+	     mem->slots[i].list; i--)
+		mem->slots[i].list = ++count;
 
 	/*
 	 * Update the indices to avoid searching in the next round.
@@ -600,12 +493,12 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
 		size_t mapping_size, size_t alloc_size,
 		enum dma_data_direction dir, unsigned long attrs)
 {
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
+	struct io_tlb_mem *mem = io_tlb_default_mem;
 	unsigned int offset = swiotlb_align_offset(dev, orig_addr);
 	unsigned int index, i;
 	phys_addr_t tlb_addr;
 
-	if (no_iotlb_memory)
+	if (!mem)
 		panic("Can not allocate SWIOTLB buffer earlier and can't now provide you with the DMA bounce buffer");
 
 	if (mem_encrypt_active())
@@ -632,8 +525,9 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
 	 * needed.
 	 */
 	for (i = 0; i < nr_slots(alloc_size + offset); i++) {
-		mem->orig_addr[index + i] = slot_addr(orig_addr, i);
-		mem->alloc_size[index + i] = alloc_size - (i << IO_TLB_SHIFT);
+		mem->slots[index + i].orig_addr = slot_addr(orig_addr, i);
+		mem->slots[index + i].alloc_size =
+			alloc_size - (i << IO_TLB_SHIFT);
 	}
 	tlb_addr = slot_addr(mem->start, index) + offset;
 	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
@@ -649,11 +543,11 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 			      size_t mapping_size, enum dma_data_direction dir,
 			      unsigned long attrs)
 {
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
+	struct io_tlb_mem *mem = io_tlb_default_mem;
 	unsigned long flags;
 	unsigned int offset = swiotlb_align_offset(hwdev, tlb_addr);
 	int index = (tlb_addr - offset - mem->start) >> IO_TLB_SHIFT;
-	int nslots = nr_slots(mem->alloc_size[index] + offset);
+	int nslots = nr_slots(mem->slots[index].alloc_size + offset);
 	int count, i;
 
 	/*
@@ -671,7 +565,7 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 	 */
 	spin_lock_irqsave(&mem->lock, flags);
 	if (index + nslots < ALIGN(index + 1, IO_TLB_SEGSIZE))
-		count = mem->list[index + nslots];
+		count = mem->slots[index + nslots].list;
 	else
 		count = 0;
 
@@ -680,9 +574,9 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 	 * superceeding slots
 	 */
 	for (i = index + nslots - 1; i >= index; i--) {
-		mem->list[i] = ++count;
-		mem->orig_addr[i] = INVALID_PHYS_ADDR;
-		mem->alloc_size[i] = 0;
+		mem->slots[i].list = ++count;
+		mem->slots[i].orig_addr = INVALID_PHYS_ADDR;
+		mem->slots[i].alloc_size = 0;
 	}
 
 	/*
@@ -690,9 +584,9 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 	 * available (non zero)
 	 */
 	for (i = index - 1;
-	     io_tlb_offset(i) != IO_TLB_SEGSIZE - 1 && mem->list[i];
+	     io_tlb_offset(i) != IO_TLB_SEGSIZE - 1 && mem->slots[i].list;
 	     i--)
-		mem->list[i] = ++count;
+		mem->slots[i].list = ++count;
 	mem->used -= nslots;
 	spin_unlock_irqrestore(&mem->lock, flags);
 }
@@ -756,19 +650,17 @@ size_t swiotlb_max_mapping_size(struct device *dev)
 
 bool is_swiotlb_active(void)
 {
-	/*
-	 * When SWIOTLB is initialized, even if mem->start points to physical
-	 * address zero, mem->end surely doesn't.
-	 */
-	return io_tlb_default_mem.end != 0;
+	return io_tlb_default_mem != NULL;
 }
 
 #ifdef CONFIG_DEBUG_FS
 
 static int __init swiotlb_create_debugfs(void)
 {
-	struct io_tlb_mem *mem = &io_tlb_default_mem;
+	struct io_tlb_mem *mem = io_tlb_default_mem;
 
+	if (!mem)
+		return 0;
 	mem->debugfs = debugfs_create_dir("swiotlb", NULL);
 	debugfs_create_ulong("io_tlb_nslabs", 0400, mem->debugfs, &mem->nslabs);
 	debugfs_create_ulong("io_tlb_used", 0400, mem->debugfs, &mem->used);
-- 
cgit v1.2.3


From 2cbc2776efe4faed0e17c48ae076aa03a0fcc61f Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Thu, 18 Mar 2021 17:14:24 +0100
Subject: swiotlb: remove swiotlb_nr_tbl

All callers just use it to check if swiotlb is active at all, for which
they can just use is_swiotlb_active.  In the longer run drivers need
to stop using is_swiotlb_active as well, but let's do the simple step
first.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_internal.c | 2 +-
 drivers/gpu/drm/nouveau/nouveau_ttm.c        | 2 +-
 drivers/pci/xen-pcifront.c                   | 2 +-
 include/linux/swiotlb.h                      | 1 -
 kernel/dma/swiotlb.c                         | 7 +------
 5 files changed, 4 insertions(+), 10 deletions(-)

(limited to 'drivers')

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_internal.c b/drivers/gpu/drm/i915/gem/i915_gem_internal.c
index ad22f42541bd..a9d65fc8aa0e 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_internal.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_internal.c
@@ -42,7 +42,7 @@ static int i915_gem_object_get_pages_internal(struct drm_i915_gem_object *obj)
 
 	max_order = MAX_ORDER;
 #ifdef CONFIG_SWIOTLB
-	if (swiotlb_nr_tbl()) {
+	if (is_swiotlb_active()) {
 		unsigned int max_segment;
 
 		max_segment = swiotlb_max_segment();
diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c
index a37bc3d7b38b..9662522aa066 100644
--- a/drivers/gpu/drm/nouveau/nouveau_ttm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c
@@ -321,7 +321,7 @@ nouveau_ttm_init(struct nouveau_drm *drm)
 	}
 
 #if IS_ENABLED(CONFIG_SWIOTLB) && IS_ENABLED(CONFIG_X86)
-	need_swiotlb = !!swiotlb_nr_tbl();
+	need_swiotlb = is_swiotlb_active();
 #endif
 
 	ret = ttm_bo_device_init(&drm->ttm.bdev, &nouveau_bo_driver,
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index 2d7502648219..b7a8f3a1921f 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -693,7 +693,7 @@ static int pcifront_connect_and_init_dma(struct pcifront_device *pdev)
 
 	spin_unlock(&pcifront_dev_lock);
 
-	if (!err && !swiotlb_nr_tbl()) {
+	if (!err && !is_swiotlb_active()) {
 		err = pci_xen_swiotlb_init_late();
 		if (err)
 			dev_err(&pdev->xdev->dev, "Could not setup SWIOTLB!\n");
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 63f7a63f61d0..216854a5e513 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -37,7 +37,6 @@ enum swiotlb_force {
 
 extern void swiotlb_init(int verbose);
 int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose);
-extern unsigned long swiotlb_nr_tbl(void);
 unsigned long swiotlb_size_or_default(void);
 extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs);
 extern int swiotlb_late_init_with_default_size(size_t default_size);
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 13de669a9b46..539c76beb52e 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -94,12 +94,6 @@ setup_io_tlb_npages(char *str)
 }
 early_param("swiotlb", setup_io_tlb_npages);
 
-unsigned long swiotlb_nr_tbl(void)
-{
-	return io_tlb_default_mem ? io_tlb_default_mem->nslabs : 0;
-}
-EXPORT_SYMBOL_GPL(swiotlb_nr_tbl);
-
 unsigned int swiotlb_max_segment(void)
 {
 	return io_tlb_default_mem ? max_segment : 0;
@@ -652,6 +646,7 @@ bool is_swiotlb_active(void)
 {
 	return io_tlb_default_mem != NULL;
 }
+EXPORT_SYMBOL_GPL(is_swiotlb_active);
 
 #ifdef CONFIG_DEBUG_FS
 
-- 
cgit v1.2.3


From 20e1dbf2bbe2431072571000ed31dfef09359c08 Mon Sep 17 00:00:00 2001
From: Ricardo Ribalda <ribalda@chromium.org>
Date: Sat, 13 Mar 2021 00:55:20 +0100
Subject: media: uvcvideo: Use dma_alloc_noncontiguous API

On architectures where there is no coherent caching such as ARM use the
dma_alloc_noncontiguous API and handle manually the cache flushing using
dma_sync_sgtable().

If the architechture has coherent cache, the API falls back to
alloc_dma_pages, so we can remove the coherent caching code-path from the
driver, making it simpler.

With this patch on the affected architectures we can measure up to 20x
performance improvement in uvc_video_copy_data_work().

Eg: aarch64 with an external usb camera

NON_CONTIGUOUS
frames:  999
packets: 999
empty:   0 (0 %)
errors:  0
invalid: 0
pts: 0 early, 0 initial, 999 ok
scr: 0 count ok, 0 diff ok
sof: 2048 <= sof <= 0, freq 0.000 kHz
bytes 67034480 : duration 33303
FPS: 29.99
URB: 523446/4993 uS/qty: 104.836 avg 132.532 std 13.230 min 831.094 max (uS)
header: 76564/4993 uS/qty: 15.334 avg 15.229 std 3.438 min 186.875 max (uS)
latency: 468945/4992 uS/qty: 93.939 avg 132.577 std 9.531 min 824.010 max (uS)
decode: 54161/4993 uS/qty: 10.847 avg 6.313 std 1.614 min 111.458 max (uS)
raw decode speed: 9.931 Gbits/s
raw URB handling speed: 1.025 Gbits/s
throughput: 16.102 Mbits/s
URB decode CPU usage 0.162600 %

COHERENT
frames:  999
packets: 999
empty:   0 (0 %)
errors:  0
invalid: 0
pts: 0 early, 0 initial, 999 ok
scr: 0 count ok, 0 diff ok
sof: 2048 <= sof <= 0, freq 0.000 kHz
bytes 54683536 : duration 33302
FPS: 29.99
URB: 1478135/4000 uS/qty: 369.533 avg 390.357 std 22.968 min 3337.865 max (uS)
header: 79761/4000 uS/qty: 19.940 avg 18.495 std 1.875 min 336.719 max (uS)
latency: 281077/4000 uS/qty: 70.269 avg 83.102 std 5.104 min 735.000 max (uS)
decode: 1197057/4000 uS/qty: 299.264 avg 318.080 std 1.615 min 2806.667 max (uS)
raw decode speed: 365.470 Mbits/s
raw URB handling speed: 295.986 Mbits/s
throughput: 13.136 Mbits/s
URB decode CPU usage 3.594500 %

In non-affected architectures we see no significant impact.

Eg: x86 with an external usb camera

NON_CONTIGUOUS
frames:  999
packets: 999
empty:   0 (0 %)
errors:  0
invalid: 0
pts: 0 early, 0 initial, 999 ok
scr: 0 count ok, 0 diff ok
sof: 2048 <= sof <= 0, freq 0.000 kHz
bytes 70179056 : duration 33301
FPS: 29.99
URB: 288901/4897 uS/qty: 58.995 avg 26.022 std 4.319 min 253.853 max (uS)
header: 54792/4897 uS/qty: 11.189 avg 6.218 std 0.620 min 61.750 max (uS)
latency: 236602/4897 uS/qty: 48.315 avg 24.244 std 1.764 min 240.924 max (uS)
decode: 52298/4897 uS/qty: 10.679 avg 8.299 std 1.638 min 108.861 max (uS)
raw decode speed: 10.796 Gbits/s
raw URB handling speed: 1.949 Gbits/s
throughput: 16.859 Mbits/s
URB decode CPU usage 0.157000 %

COHERENT
frames:  999
packets: 999
empty:   0 (0 %)
errors:  0
invalid: 0
pts: 0 early, 0 initial, 999 ok
scr: 0 count ok, 0 diff ok
sof: 2048 <= sof <= 0, freq 0.000 kHz
bytes 71818320 : duration 33301
FPS: 29.99
URB: 321021/5000 uS/qty: 64.204 avg 23.001 std 10.430 min 268.837 max (uS)
header: 54308/5000 uS/qty: 10.861 avg 5.104 std 0.778 min 54.736 max (uS)
latency: 268799/5000 uS/qty: 53.759 avg 21.827 std 6.095 min 255.153 max (uS)
decode: 52222/5000 uS/qty: 10.444 avg 7.137 std 1.874 min 71.103 max (uS)
raw decode speed: 11.048 Gbits/s
raw URB handling speed: 1.789 Gbits/s
throughput: 17.253 Mbits/s
URB decode CPU usage 0.156800 %

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/media/usb/uvc/uvc_video.c | 94 ++++++++++++++++++++++++++++-----------
 drivers/media/usb/uvc/uvcvideo.h  |  5 ++-
 2 files changed, 73 insertions(+), 26 deletions(-)

(limited to 'drivers')

diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index f2f565281e63..a777b389a66e 100644
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -6,11 +6,14 @@
  *          Laurent Pinchart (laurent.pinchart@ideasonboard.com)
  */
 
+#include <linux/dma-mapping.h>
+#include <linux/highmem.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/usb.h>
+#include <linux/usb/hcd.h>
 #include <linux/videodev2.h>
 #include <linux/vmalloc.h>
 #include <linux/wait.h>
@@ -1096,6 +1099,29 @@ static int uvc_video_decode_start(struct uvc_streaming *stream,
 	return data[0];
 }
 
+static inline enum dma_data_direction uvc_stream_dir(
+				struct uvc_streaming *stream)
+{
+	if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return DMA_FROM_DEVICE;
+	else
+		return DMA_TO_DEVICE;
+}
+
+static inline struct device *uvc_stream_to_dmadev(struct uvc_streaming *stream)
+{
+	return bus_to_hcd(stream->dev->udev->bus)->self.sysdev;
+}
+
+static int uvc_submit_urb(struct uvc_urb *uvc_urb, gfp_t mem_flags)
+{
+	/* Sync DMA. */
+	dma_sync_sgtable_for_device(uvc_stream_to_dmadev(uvc_urb->stream),
+				    uvc_urb->sgt,
+				    uvc_stream_dir(uvc_urb->stream));
+	return usb_submit_urb(uvc_urb->urb, mem_flags);
+}
+
 /*
  * uvc_video_decode_data_work: Asynchronous memcpy processing
  *
@@ -1117,7 +1143,7 @@ static void uvc_video_copy_data_work(struct work_struct *work)
 		uvc_queue_buffer_release(op->buf);
 	}
 
-	ret = usb_submit_urb(uvc_urb->urb, GFP_KERNEL);
+	ret = uvc_submit_urb(uvc_urb, GFP_KERNEL);
 	if (ret < 0)
 		dev_err(&uvc_urb->stream->intf->dev,
 			"Failed to resubmit video URB (%d).\n", ret);
@@ -1537,6 +1563,12 @@ static void uvc_video_complete(struct urb *urb)
 	/* Re-initialise the URB async work. */
 	uvc_urb->async_operations = 0;
 
+	/* Sync DMA and invalidate vmap range. */
+	dma_sync_sgtable_for_cpu(uvc_stream_to_dmadev(uvc_urb->stream),
+				 uvc_urb->sgt, uvc_stream_dir(stream));
+	invalidate_kernel_vmap_range(uvc_urb->buffer,
+				     uvc_urb->stream->urb_size);
+
 	/*
 	 * Process the URB headers, and optionally queue expensive memcpy tasks
 	 * to be deferred to a work queue.
@@ -1545,7 +1577,7 @@ static void uvc_video_complete(struct urb *urb)
 
 	/* If no async work is needed, resubmit the URB immediately. */
 	if (!uvc_urb->async_operations) {
-		ret = usb_submit_urb(uvc_urb->urb, GFP_ATOMIC);
+		ret = uvc_submit_urb(uvc_urb, GFP_ATOMIC);
 		if (ret < 0)
 			dev_err(&stream->intf->dev,
 				"Failed to resubmit video URB (%d).\n", ret);
@@ -1560,24 +1592,49 @@ static void uvc_video_complete(struct urb *urb)
  */
 static void uvc_free_urb_buffers(struct uvc_streaming *stream)
 {
+	struct device *dma_dev = uvc_stream_to_dmadev(stream);
 	struct uvc_urb *uvc_urb;
 
 	for_each_uvc_urb(uvc_urb, stream) {
 		if (!uvc_urb->buffer)
 			continue;
 
-#ifndef CONFIG_DMA_NONCOHERENT
-		usb_free_coherent(stream->dev->udev, stream->urb_size,
-				  uvc_urb->buffer, uvc_urb->dma);
-#else
-		kfree(uvc_urb->buffer);
-#endif
+		dma_vunmap_noncontiguous(dma_dev, uvc_urb->buffer);
+		dma_free_noncontiguous(dma_dev, stream->urb_size, uvc_urb->sgt,
+				       uvc_stream_dir(stream));
+
 		uvc_urb->buffer = NULL;
+		uvc_urb->sgt = NULL;
 	}
 
 	stream->urb_size = 0;
 }
 
+static bool uvc_alloc_urb_buffer(struct uvc_streaming *stream,
+				 struct uvc_urb *uvc_urb, gfp_t gfp_flags)
+{
+	struct device *dma_dev = uvc_stream_to_dmadev(stream);
+
+	uvc_urb->sgt = dma_alloc_noncontiguous(dma_dev, stream->urb_size,
+					       uvc_stream_dir(stream),
+					       gfp_flags, 0);
+	if (!uvc_urb->sgt)
+		return false;
+	uvc_urb->dma = uvc_urb->sgt->sgl->dma_address;
+
+	uvc_urb->buffer = dma_vmap_noncontiguous(dma_dev, stream->urb_size,
+						 uvc_urb->sgt);
+	if (!uvc_urb->buffer) {
+		dma_free_noncontiguous(dma_dev, stream->urb_size,
+				       uvc_urb->sgt,
+				       uvc_stream_dir(stream));
+		uvc_urb->sgt = NULL;
+		return false;
+	}
+
+	return true;
+}
+
 /*
  * Allocate transfer buffers. This function can be called with buffers
  * already allocated when resuming from suspend, in which case it will
@@ -1608,19 +1665,12 @@ static int uvc_alloc_urb_buffers(struct uvc_streaming *stream,
 
 	/* Retry allocations until one succeed. */
 	for (; npackets > 1; npackets /= 2) {
+		stream->urb_size = psize * npackets;
+
 		for (i = 0; i < UVC_URBS; ++i) {
 			struct uvc_urb *uvc_urb = &stream->uvc_urb[i];
 
-			stream->urb_size = psize * npackets;
-#ifndef CONFIG_DMA_NONCOHERENT
-			uvc_urb->buffer = usb_alloc_coherent(
-				stream->dev->udev, stream->urb_size,
-				gfp_flags | __GFP_NOWARN, &uvc_urb->dma);
-#else
-			uvc_urb->buffer =
-			    kmalloc(stream->urb_size, gfp_flags | __GFP_NOWARN);
-#endif
-			if (!uvc_urb->buffer) {
+			if (!uvc_alloc_urb_buffer(stream, uvc_urb, gfp_flags)) {
 				uvc_free_urb_buffers(stream);
 				break;
 			}
@@ -1730,12 +1780,8 @@ static int uvc_init_video_isoc(struct uvc_streaming *stream,
 		urb->context = uvc_urb;
 		urb->pipe = usb_rcvisocpipe(stream->dev->udev,
 				ep->desc.bEndpointAddress);
-#ifndef CONFIG_DMA_NONCOHERENT
 		urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
 		urb->transfer_dma = uvc_urb->dma;
-#else
-		urb->transfer_flags = URB_ISO_ASAP;
-#endif
 		urb->interval = ep->desc.bInterval;
 		urb->transfer_buffer = uvc_urb->buffer;
 		urb->complete = uvc_video_complete;
@@ -1795,10 +1841,8 @@ static int uvc_init_video_bulk(struct uvc_streaming *stream,
 
 		usb_fill_bulk_urb(urb, stream->dev->udev, pipe,	uvc_urb->buffer,
 				  size, uvc_video_complete, uvc_urb);
-#ifndef CONFIG_DMA_NONCOHERENT
 		urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
 		urb->transfer_dma = uvc_urb->dma;
-#endif
 
 		uvc_urb->urb = urb;
 	}
@@ -1895,7 +1939,7 @@ static int uvc_video_start_transfer(struct uvc_streaming *stream,
 
 	/* Submit the URBs. */
 	for_each_uvc_urb(uvc_urb, stream) {
-		ret = usb_submit_urb(uvc_urb->urb, gfp_flags);
+		ret = uvc_submit_urb(uvc_urb, gfp_flags);
 		if (ret < 0) {
 			dev_err(&stream->intf->dev,
 				"Failed to submit URB %u (%d).\n",
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 97df5ecd66c9..cce5e38133cd 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -219,6 +219,7 @@
  */
 
 struct gpio_desc;
+struct sg_table;
 struct uvc_device;
 
 /* TODO: Put the most frequently accessed fields at the beginning of
@@ -545,7 +546,8 @@ struct uvc_copy_op {
  * @urb: the URB described by this context structure
  * @stream: UVC streaming context
  * @buffer: memory storage for the URB
- * @dma: DMA coherent addressing for the urb_buffer
+ * @dma: Allocated DMA handle
+ * @sgt: sgt_table with the urb locations in memory
  * @async_operations: counter to indicate the number of copy operations
  * @copy_operations: work descriptors for asynchronous copy operations
  * @work: work queue entry for asynchronous decode
@@ -556,6 +558,7 @@ struct uvc_urb {
 
 	char *buffer;
 	dma_addr_t dma;
+	struct sg_table *sgt;
 
 	unsigned int async_operations;
 	struct uvc_copy_op copy_operations[UVC_MAX_PACKETS];
-- 
cgit v1.2.3


From bfae2779fe4b92421fbe1b2008bfd6b9fada823e Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Fri, 19 Mar 2021 20:35:58 -0700
Subject: Input: ims-pcu - drop redundant driver-data assignment

The driver data for the data interface has already been set by
usb_driver_claim_interface() so drop the subsequent redundant
assignment.

Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20210318155525.22496-1-johan@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/misc/ims-pcu.c | 1 -
 1 file changed, 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/input/misc/ims-pcu.c b/drivers/input/misc/ims-pcu.c
index 08b9b5cdb943..81de8c4e37d0 100644
--- a/drivers/input/misc/ims-pcu.c
+++ b/drivers/input/misc/ims-pcu.c
@@ -2018,7 +2018,6 @@ static int ims_pcu_probe(struct usb_interface *intf,
 	}
 
 	usb_set_intfdata(pcu->ctrl_intf, pcu);
-	usb_set_intfdata(pcu->data_intf, pcu);
 
 	error = ims_pcu_buffers_alloc(pcu);
 	if (error)
-- 
cgit v1.2.3


From 4895bfe91199e19fd6bc9b43307cf4adb0409746 Mon Sep 17 00:00:00 2001
From: "edison.jiang" <jiangzhipeng@yulong.com>
Date: Fri, 19 Mar 2021 20:56:00 -0700
Subject: Input: lpc32xx_ts - convert to use BIT()

There is error from cppcheck tool.
 "Shifting signed 32-bit value by 31 bits is undefined behaviour errors"

Signed-off-by: edison.jiang <jiangzhipeng@yulong.com>
Link: https://lore.kernel.org/r/20210316153150.1207-1-jzp0409@163.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/lpc32xx_ts.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/lpc32xx_ts.c b/drivers/input/touchscreen/lpc32xx_ts.c
index b51450b3d943..15b5cb763526 100644
--- a/drivers/input/touchscreen/lpc32xx_ts.c
+++ b/drivers/input/touchscreen/lpc32xx_ts.c
@@ -34,18 +34,18 @@
 #define LPC32XX_TSC_AUX_MIN			0x38
 #define LPC32XX_TSC_AUX_MAX			0x3C
 
-#define LPC32XX_TSC_STAT_FIFO_OVRRN		(1 << 8)
-#define LPC32XX_TSC_STAT_FIFO_EMPTY		(1 << 7)
+#define LPC32XX_TSC_STAT_FIFO_OVRRN		BIT(8)
+#define LPC32XX_TSC_STAT_FIFO_EMPTY		BIT(7)
 
 #define LPC32XX_TSC_SEL_DEFVAL			0x0284
 
 #define LPC32XX_TSC_ADCCON_IRQ_TO_FIFO_4	(0x1 << 11)
 #define LPC32XX_TSC_ADCCON_X_SAMPLE_SIZE(s)	((10 - (s)) << 7)
 #define LPC32XX_TSC_ADCCON_Y_SAMPLE_SIZE(s)	((10 - (s)) << 4)
-#define LPC32XX_TSC_ADCCON_POWER_UP		(1 << 2)
-#define LPC32XX_TSC_ADCCON_AUTO_EN		(1 << 0)
+#define LPC32XX_TSC_ADCCON_POWER_UP		BIT(2)
+#define LPC32XX_TSC_ADCCON_AUTO_EN		BIT(0)
 
-#define LPC32XX_TSC_FIFO_TS_P_LEVEL		(1 << 31)
+#define LPC32XX_TSC_FIFO_TS_P_LEVEL		BIT(31)
 #define LPC32XX_TSC_FIFO_NORMALIZE_X_VAL(x)	(((x) & 0x03FF0000) >> 16)
 #define LPC32XX_TSC_FIFO_NORMALIZE_Y_VAL(y)	((y) & 0x000003FF)
 
-- 
cgit v1.2.3


From 8b488ef295f206885dbe48de09346059df620dfa Mon Sep 17 00:00:00 2001
From: Dmitry Osipenko <digetx@gmail.com>
Date: Sat, 20 Mar 2021 19:23:44 -0700
Subject: Input: atmel_mxt_ts - support wakeup methods

According to datasheets, chips like mXT1386 have a WAKE line, it is used
to wake the chip up from deep sleep mode before communicating with it via
the I2C-compatible interface.

If the WAKE line is connected to a GPIO line, the line must be asserted
25 ms before the host attempts to communicate with the controller. If the
WAKE line is connected to the SCL pin, the controller will send a NACK on
the first attempt to address it, the host must then retry 25 ms later.

Implement the wake-up methods in the driver. Touchscreen now works
properly on devices like Acer A500 tablet, fixing problems like this:

 atmel_mxt_ts 0-004c: __mxt_read_reg: i2c transfer failed (-121)
 atmel_mxt_ts 0-004c: mxt_bootloader_read: i2c recv failed (-121)
 atmel_mxt_ts 0-004c: Trying alternate bootloader address
 atmel_mxt_ts 0-004c: mxt_bootloader_read: i2c recv failed (-121)
 atmel_mxt_ts: probe of 0-004c failed with error -121

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20210302102158.10533-3-digetx@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/atmel_mxt_ts.c | 78 ++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 383a848eb601..5ed23689047b 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -31,6 +31,7 @@
 #include <media/v4l2-ioctl.h>
 #include <media/videobuf2-v4l2.h>
 #include <media/videobuf2-vmalloc.h>
+#include <dt-bindings/input/atmel-maxtouch.h>
 
 /* Firmware files */
 #define MXT_FW_NAME		"maxtouch.fw"
@@ -199,6 +200,7 @@ enum t100_type {
 #define MXT_CRC_TIMEOUT		1000	/* msec */
 #define MXT_FW_RESET_TIME	3000	/* msec */
 #define MXT_FW_CHG_TIMEOUT	300	/* msec */
+#define MXT_WAKEUP_TIME		25	/* msec */
 
 /* Command to unlock bootloader */
 #define MXT_UNLOCK_CMD_MSB	0xaa
@@ -312,6 +314,7 @@ struct mxt_data {
 	struct mxt_dbg dbg;
 	struct regulator_bulk_data regulators[2];
 	struct gpio_desc *reset_gpio;
+	struct gpio_desc *wake_gpio;
 	bool use_retrigen_workaround;
 
 	/* Cached parameters from object table */
@@ -342,6 +345,8 @@ struct mxt_data {
 	unsigned int t19_num_keys;
 
 	enum mxt_suspend_mode suspend_mode;
+
+	u32 wakeup_method;
 };
 
 struct mxt_vb2_buffer {
@@ -621,10 +626,42 @@ static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
 	return mxt_bootloader_write(data, buf, sizeof(buf));
 }
 
+static bool mxt_wakeup_toggle(struct i2c_client *client,
+			      bool wake_up, bool in_i2c)
+{
+	struct mxt_data *data = i2c_get_clientdata(client);
+
+	switch (data->wakeup_method) {
+	case ATMEL_MXT_WAKEUP_I2C_SCL:
+		if (!in_i2c)
+			return false;
+		break;
+
+	case ATMEL_MXT_WAKEUP_GPIO:
+		if (in_i2c)
+			return false;
+
+		gpiod_set_value(data->wake_gpio, wake_up);
+		break;
+
+	default:
+		return false;
+	}
+
+	if (wake_up) {
+		dev_dbg(&client->dev, "waking up controller\n");
+
+		msleep(MXT_WAKEUP_TIME);
+	}
+
+	return true;
+}
+
 static int __mxt_read_reg(struct i2c_client *client,
 			       u16 reg, u16 len, void *val)
 {
 	struct i2c_msg xfer[2];
+	bool retried = false;
 	u8 buf[2];
 	int ret;
 
@@ -643,9 +680,13 @@ static int __mxt_read_reg(struct i2c_client *client,
 	xfer[1].len = len;
 	xfer[1].buf = val;
 
+retry:
 	ret = i2c_transfer(client->adapter, xfer, 2);
 	if (ret == 2) {
 		ret = 0;
+	} else if (!retried && mxt_wakeup_toggle(client, true, true)) {
+		retried = true;
+		goto retry;
 	} else {
 		if (ret >= 0)
 			ret = -EIO;
@@ -659,6 +700,7 @@ static int __mxt_read_reg(struct i2c_client *client,
 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
 			   const void *val)
 {
+	bool retried = false;
 	u8 *buf;
 	size_t count;
 	int ret;
@@ -672,9 +714,13 @@ static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
 	buf[1] = (reg >> 8) & 0xff;
 	memcpy(&buf[2], val, len);
 
+retry:
 	ret = i2c_master_send(client, buf, count);
 	if (ret == count) {
 		ret = 0;
+	} else if (!retried && mxt_wakeup_toggle(client, true, true)) {
+		retried = true;
+		goto retry;
 	} else {
 		if (ret >= 0)
 			ret = -EIO;
@@ -2975,6 +3021,8 @@ static const struct attribute_group mxt_attr_group = {
 
 static void mxt_start(struct mxt_data *data)
 {
+	mxt_wakeup_toggle(data->client, true, false);
+
 	switch (data->suspend_mode) {
 	case MXT_SUSPEND_T9_CTRL:
 		mxt_soft_reset(data);
@@ -3009,6 +3057,8 @@ static void mxt_stop(struct mxt_data *data)
 		mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
 		break;
 	}
+
+	mxt_wakeup_toggle(data->client, false, false);
 }
 
 static int mxt_input_open(struct input_dev *dev)
@@ -3155,6 +3205,15 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
 		return error;
 	}
 
+	/* Request the WAKE line as asserted so we go out of sleep */
+	data->wake_gpio = devm_gpiod_get_optional(&client->dev,
+						  "wake", GPIOD_OUT_HIGH);
+	if (IS_ERR(data->wake_gpio)) {
+		error = PTR_ERR(data->wake_gpio);
+		dev_err(&client->dev, "Failed to get wake gpio: %d\n", error);
+		return error;
+	}
+
 	error = devm_request_threaded_irq(&client->dev, client->irq,
 					  NULL, mxt_interrupt, IRQF_ONESHOT,
 					  client->name, data);
@@ -3185,6 +3244,25 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
 		msleep(MXT_RESET_INVALID_CHG);
 	}
 
+	/*
+	 * Controllers like mXT1386 have a dedicated WAKE line that could be
+	 * connected to a GPIO or to I2C SCL pin, or permanently asserted low.
+	 *
+	 * This WAKE line is used for waking controller from a deep-sleep and
+	 * it needs to be asserted low for 25 milliseconds before I2C transfers
+	 * could be accepted by controller if it was in a deep-sleep mode.
+	 * Controller will go into sleep automatically after 2 seconds of
+	 * inactivity if WAKE line is deasserted and deep sleep is activated.
+	 *
+	 * If WAKE line is connected to I2C SCL pin, then the first I2C transfer
+	 * will get an instant NAK and transfer needs to be retried after 25ms.
+	 *
+	 * If WAKE line is connected to a GPIO line, the line must be asserted
+	 * 25ms before the host attempts to communicate with the controller.
+	 */
+	device_property_read_u32(&client->dev, "atmel,wakeup-method",
+				 &data->wakeup_method);
+
 	error = mxt_initialize(data);
 	if (error)
 		goto err_disable_regulators;
-- 
cgit v1.2.3


From ca0d2fb790eb26fc53d851007ed1ead6c048be11 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Thu, 14 Jan 2021 21:48:04 +0100
Subject: pwm: bcm2835: Improve period and duty cycle calculation
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

With an input clk rate bigger than 2000000000, scaler would have been
zero which then would have resulted in a division by zero.

Also the originally implemented algorithm divided by the result of a
division. This nearly always looses precision. Consider a requested period
of 1000000 ns. With an input clock frequency of 32786885 Hz the hardware
was configured with an actual period of 983869.007 ns (PERIOD = 32258)
while the hardware can provide 1000003.508 ns (PERIOD = 32787).
And note if the input clock frequency was 32786886 Hz instead, the hardware
was configured to 1016656.477 ns (PERIOD = 33333) while the optimal
setting results in 1000003.477 ns (PERIOD = 32787).

This patch implements proper range checking and only divides once for
the calculation of period (and similar for duty_cycle).

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Tested-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-bcm2835.c | 35 +++++++++++++++++++++++++++--------
 1 file changed, 27 insertions(+), 8 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-bcm2835.c b/drivers/pwm/pwm-bcm2835.c
index 6ff5f04b3e07..d593cce249d9 100644
--- a/drivers/pwm/pwm-bcm2835.c
+++ b/drivers/pwm/pwm-bcm2835.c
@@ -64,8 +64,9 @@ static int bcm2835_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 
 	struct bcm2835_pwm *pc = to_bcm2835_pwm(chip);
 	unsigned long rate = clk_get_rate(pc->clk);
-	unsigned long long period;
-	unsigned long scaler;
+	unsigned long long period_cycles;
+	u64 max_period;
+
 	u32 val;
 
 	if (!rate) {
@@ -73,18 +74,36 @@ static int bcm2835_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 		return -EINVAL;
 	}
 
-	scaler = DIV_ROUND_CLOSEST(NSEC_PER_SEC, rate);
+	/*
+	 * period_cycles must be a 32 bit value, so period * rate / NSEC_PER_SEC
+	 * must be <= U32_MAX. As U32_MAX * NSEC_PER_SEC < U64_MAX the
+	 * multiplication period * rate doesn't overflow.
+	 * To calculate the maximal possible period that guarantees the
+	 * above inequality:
+	 *
+	 *     round(period * rate / NSEC_PER_SEC) <= U32_MAX
+	 * <=> period * rate / NSEC_PER_SEC < U32_MAX + 0.5
+	 * <=> period * rate < (U32_MAX + 0.5) * NSEC_PER_SEC
+	 * <=> period < ((U32_MAX + 0.5) * NSEC_PER_SEC) / rate
+	 * <=> period < ((U32_MAX * NSEC_PER_SEC + NSEC_PER_SEC/2) / rate
+	 * <=> period <= ceil((U32_MAX * NSEC_PER_SEC + NSEC_PER_SEC/2) / rate) - 1
+	 */
+	max_period = DIV_ROUND_UP_ULL((u64)U32_MAX * NSEC_PER_SEC + NSEC_PER_SEC / 2, rate) - 1;
+
+	if (state->period > max_period)
+		return -EINVAL;
+
 	/* set period */
-	period = DIV_ROUND_CLOSEST_ULL(state->period, scaler);
+	period_cycles = DIV_ROUND_CLOSEST_ULL(state->period * rate, NSEC_PER_SEC);
 
-	/* dont accept a period that is too small or has been truncated */
-	if ((period < PERIOD_MIN) || (period > U32_MAX))
+	/* don't accept a period that is too small */
+	if (period_cycles < PERIOD_MIN)
 		return -EINVAL;
 
-	writel(period, pc->base + PERIOD(pwm->hwpwm));
+	writel(period_cycles, pc->base + PERIOD(pwm->hwpwm));
 
 	/* set duty cycle */
-	val = DIV_ROUND_CLOSEST_ULL(state->duty_cycle, scaler);
+	val = DIV_ROUND_CLOSEST_ULL(state->duty_cycle * rate, NSEC_PER_SEC);
 	writel(val, pc->base + DUTY(pwm->hwpwm));
 
 	/* set polarity */
-- 
cgit v1.2.3


From acf3402d83636ef4fb81aa35593f1c1fd7f05738 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Mon, 1 Mar 2021 19:45:37 +0100
Subject: pwm: ab8500: Implement .apply instead of .config, .enable and
 .disable
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

To eventually get rid of all legacy drivers convert this driver to the
modern world implementing .apply().

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-ab8500.c | 53 +++++++++++++++++++++++-------------------------
 1 file changed, 25 insertions(+), 28 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-ab8500.c b/drivers/pwm/pwm-ab8500.c
index 58c6c0f5b0ec..5b0a71243d0f 100644
--- a/drivers/pwm/pwm-ab8500.c
+++ b/drivers/pwm/pwm-ab8500.c
@@ -24,23 +24,37 @@ struct ab8500_pwm_chip {
 	struct pwm_chip chip;
 };
 
-static int ab8500_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
-			     int duty_ns, int period_ns)
+static int ab8500_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+			    const struct pwm_state *state)
 {
-	int ret = 0;
-	unsigned int higher_val, lower_val;
+	int ret;
 	u8 reg;
+	unsigned int higher_val, lower_val;
+
+	if (state->polarity != PWM_POLARITY_NORMAL)
+		return -EINVAL;
+
+	if (!state->enabled) {
+		ret = abx500_mask_and_set_register_interruptible(chip->dev,
+					AB8500_MISC, AB8500_PWM_OUT_CTRL7_REG,
+					1 << (chip->base - 1), 0);
+
+		if (ret < 0)
+			dev_err(chip->dev, "%s: Failed to disable PWM, Error %d\n",
+								pwm->label, ret);
+		return ret;
+	}
 
 	/*
 	 * get the first 8 bits that are be written to
 	 * AB8500_PWM_OUT_CTRL1_REG[0:7]
 	 */
-	lower_val = duty_ns & 0x00FF;
+	lower_val = state->duty_cycle & 0x00FF;
 	/*
 	 * get bits [9:10] that are to be written to
 	 * AB8500_PWM_OUT_CTRL2_REG[0:1]
 	 */
-	higher_val = ((duty_ns & 0x0300) >> 8);
+	higher_val = ((state->duty_cycle & 0x0300) >> 8);
 
 	reg = AB8500_PWM_OUT_CTRL1_REG + ((chip->base - 1) * 2);
 
@@ -48,15 +62,11 @@ static int ab8500_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
 			reg, (u8)lower_val);
 	if (ret < 0)
 		return ret;
+
 	ret = abx500_set_register_interruptible(chip->dev, AB8500_MISC,
 			(reg + 1), (u8)higher_val);
-
-	return ret;
-}
-
-static int ab8500_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
-{
-	int ret;
+	if (ret < 0)
+		return ret;
 
 	ret = abx500_mask_and_set_register_interruptible(chip->dev,
 				AB8500_MISC, AB8500_PWM_OUT_CTRL7_REG,
@@ -64,25 +74,12 @@ static int ab8500_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
 	if (ret < 0)
 		dev_err(chip->dev, "%s: Failed to enable PWM, Error %d\n",
 							pwm->label, ret);
-	return ret;
-}
 
-static void ab8500_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
-{
-	int ret;
-
-	ret = abx500_mask_and_set_register_interruptible(chip->dev,
-				AB8500_MISC, AB8500_PWM_OUT_CTRL7_REG,
-				1 << (chip->base - 1), 0);
-	if (ret < 0)
-		dev_err(chip->dev, "%s: Failed to disable PWM, Error %d\n",
-							pwm->label, ret);
+	return ret;
 }
 
 static const struct pwm_ops ab8500_pwm_ops = {
-	.config = ab8500_pwm_config,
-	.enable = ab8500_pwm_enable,
-	.disable = ab8500_pwm_disable,
+	.apply = ab8500_pwm_apply,
 	.owner = THIS_MODULE,
 };
 
-- 
cgit v1.2.3


From 5a43c201c9d05a65f1997877ba45ec41ee91b8b5 Mon Sep 17 00:00:00 2001
From: Fabio Estevam <festevam@gmail.com>
Date: Wed, 3 Mar 2021 23:42:42 -0300
Subject: pwm: imx-tpm: Use a single line for error message
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

There is no need to split the dev_err() call in three lines.

Use a single line to improve readability.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-imx-tpm.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-imx-tpm.c b/drivers/pwm/pwm-imx-tpm.c
index aaf629bd8c35..eec9ec4e1a2a 100644
--- a/drivers/pwm/pwm-imx-tpm.c
+++ b/drivers/pwm/pwm-imx-tpm.c
@@ -411,9 +411,7 @@ static int __maybe_unused pwm_imx_tpm_resume(struct device *dev)
 
 	ret = clk_prepare_enable(tpm->clk);
 	if (ret)
-		dev_err(dev,
-			"failed to prepare or enable clock: %d\n",
-			ret);
+		dev_err(dev, "failed to prepare or enable clock: %d\n", ret);
 
 	return ret;
 }
-- 
cgit v1.2.3


From f9a8ee8c8bcd118e800d88772c6457381db45224 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Mon, 1 Mar 2021 19:57:19 +0100
Subject: pwm: Always allocate PWM chip base ID dynamically
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Since commit 5e5da1e9fbee ("pwm: ab8500: Explicitly allocate pwm chip
base dynamically") all drivers use dynamic ID allocation explicitly. New
drivers are supposed to do the same, so remove support for driver
specified base IDs and drop all assignments in the low-level drivers.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/core.c             | 25 +++++++------------------
 drivers/pwm/pwm-ab8500.c       |  1 -
 drivers/pwm/pwm-atmel-hlcdc.c  |  1 -
 drivers/pwm/pwm-atmel-tcb.c    |  1 -
 drivers/pwm/pwm-atmel.c        |  1 -
 drivers/pwm/pwm-bcm-iproc.c    |  1 -
 drivers/pwm/pwm-bcm-kona.c     |  1 -
 drivers/pwm/pwm-bcm2835.c      |  1 -
 drivers/pwm/pwm-berlin.c       |  1 -
 drivers/pwm/pwm-brcmstb.c      |  1 -
 drivers/pwm/pwm-clps711x.c     |  1 -
 drivers/pwm/pwm-crc.c          |  1 -
 drivers/pwm/pwm-cros-ec.c      |  1 -
 drivers/pwm/pwm-dwc.c          |  1 -
 drivers/pwm/pwm-ep93xx.c       |  1 -
 drivers/pwm/pwm-fsl-ftm.c      |  1 -
 drivers/pwm/pwm-hibvt.c        |  1 -
 drivers/pwm/pwm-img.c          |  1 -
 drivers/pwm/pwm-imx-tpm.c      |  1 -
 drivers/pwm/pwm-imx1.c         |  1 -
 drivers/pwm/pwm-imx27.c        |  1 -
 drivers/pwm/pwm-intel-lgm.c    |  1 -
 drivers/pwm/pwm-iqs620a.c      |  1 -
 drivers/pwm/pwm-jz4740.c       |  1 -
 drivers/pwm/pwm-keembay.c      |  1 -
 drivers/pwm/pwm-lp3943.c       |  1 -
 drivers/pwm/pwm-lpc18xx-sct.c  |  1 -
 drivers/pwm/pwm-lpc32xx.c      |  1 -
 drivers/pwm/pwm-lpss.c         |  1 -
 drivers/pwm/pwm-mediatek.c     |  1 -
 drivers/pwm/pwm-meson.c        |  1 -
 drivers/pwm/pwm-mtk-disp.c     |  1 -
 drivers/pwm/pwm-mxs.c          |  1 -
 drivers/pwm/pwm-omap-dmtimer.c |  1 -
 drivers/pwm/pwm-pca9685.c      |  1 -
 drivers/pwm/pwm-pxa.c          |  1 -
 drivers/pwm/pwm-rcar.c         |  1 -
 drivers/pwm/pwm-renesas-tpu.c  |  1 -
 drivers/pwm/pwm-rockchip.c     |  1 -
 drivers/pwm/pwm-samsung.c      |  1 -
 drivers/pwm/pwm-sifive.c       |  1 -
 drivers/pwm/pwm-sl28cpld.c     |  1 -
 drivers/pwm/pwm-spear.c        |  1 -
 drivers/pwm/pwm-sprd.c         |  1 -
 drivers/pwm/pwm-sti.c          |  1 -
 drivers/pwm/pwm-stm32-lp.c     |  1 -
 drivers/pwm/pwm-stm32.c        |  1 -
 drivers/pwm/pwm-stmpe.c        |  1 -
 drivers/pwm/pwm-sun4i.c        |  1 -
 drivers/pwm/pwm-tegra.c        |  1 -
 drivers/pwm/pwm-tiecap.c       |  1 -
 drivers/pwm/pwm-tiehrpwm.c     |  1 -
 drivers/pwm/pwm-twl-led.c      |  1 -
 drivers/pwm/pwm-twl.c          |  1 -
 drivers/pwm/pwm-vt8500.c       |  1 -
 55 files changed, 7 insertions(+), 72 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index a8eff4b3ee36..8904eaa6d769 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -37,23 +37,13 @@ static struct pwm_device *pwm_to_device(unsigned int pwm)
 	return radix_tree_lookup(&pwm_tree, pwm);
 }
 
-static int alloc_pwms(int pwm, unsigned int count)
+static int alloc_pwms(unsigned int count)
 {
-	unsigned int from = 0;
 	unsigned int start;
 
-	if (pwm >= MAX_PWMS)
-		return -EINVAL;
-
-	if (pwm >= 0)
-		from = pwm;
-
-	start = bitmap_find_next_zero_area(allocated_pwms, MAX_PWMS, from,
+	start = bitmap_find_next_zero_area(allocated_pwms, MAX_PWMS, 0,
 					   count, 0);
 
-	if (pwm >= 0 && start != pwm)
-		return -EEXIST;
-
 	if (start + count > MAX_PWMS)
 		return -ENOSPC;
 
@@ -264,9 +254,8 @@ static bool pwm_ops_check(const struct pwm_chip *chip)
  * @chip: the PWM chip to add
  * @polarity: initial polarity of PWM channels
  *
- * Register a new PWM chip. If chip->base < 0 then a dynamically assigned base
- * will be used. The initial polarity for all channels is specified by the
- * @polarity parameter.
+ * Register a new PWM chip. The initial polarity for all channels is specified
+ * by the @polarity parameter.
  *
  * Returns: 0 on success or a negative error code on failure.
  */
@@ -285,18 +274,18 @@ int pwmchip_add_with_polarity(struct pwm_chip *chip,
 
 	mutex_lock(&pwm_lock);
 
-	ret = alloc_pwms(chip->base, chip->npwm);
+	ret = alloc_pwms(chip->npwm);
 	if (ret < 0)
 		goto out;
 
+	chip->base = ret;
+
 	chip->pwms = kcalloc(chip->npwm, sizeof(*pwm), GFP_KERNEL);
 	if (!chip->pwms) {
 		ret = -ENOMEM;
 		goto out;
 	}
 
-	chip->base = ret;
-
 	for (i = 0; i < chip->npwm; i++) {
 		pwm = &chip->pwms[i];
 
diff --git a/drivers/pwm/pwm-ab8500.c b/drivers/pwm/pwm-ab8500.c
index 5b0a71243d0f..e2a26d9da25b 100644
--- a/drivers/pwm/pwm-ab8500.c
+++ b/drivers/pwm/pwm-ab8500.c
@@ -98,7 +98,6 @@ static int ab8500_pwm_probe(struct platform_device *pdev)
 
 	ab8500->chip.dev = &pdev->dev;
 	ab8500->chip.ops = &ab8500_pwm_ops;
-	ab8500->chip.base = -1;
 	ab8500->chip.npwm = 1;
 
 	err = pwmchip_add(&ab8500->chip);
diff --git a/drivers/pwm/pwm-atmel-hlcdc.c b/drivers/pwm/pwm-atmel-hlcdc.c
index dcbc0489dfd4..538dbafe3e75 100644
--- a/drivers/pwm/pwm-atmel-hlcdc.c
+++ b/drivers/pwm/pwm-atmel-hlcdc.c
@@ -265,7 +265,6 @@ static int atmel_hlcdc_pwm_probe(struct platform_device *pdev)
 	chip->hlcdc = hlcdc;
 	chip->chip.ops = &atmel_hlcdc_pwm_ops;
 	chip->chip.dev = dev;
-	chip->chip.base = -1;
 	chip->chip.npwm = 1;
 	chip->chip.of_xlate = of_pwm_xlate_with_flags;
 	chip->chip.of_pwm_n_cells = 3;
diff --git a/drivers/pwm/pwm-atmel-tcb.c b/drivers/pwm/pwm-atmel-tcb.c
index 5ccc3e7420e9..ee70a615532b 100644
--- a/drivers/pwm/pwm-atmel-tcb.c
+++ b/drivers/pwm/pwm-atmel-tcb.c
@@ -454,7 +454,6 @@ static int atmel_tcb_pwm_probe(struct platform_device *pdev)
 	tcbpwm->chip.ops = &atmel_tcb_pwm_ops;
 	tcbpwm->chip.of_xlate = of_pwm_xlate_with_flags;
 	tcbpwm->chip.of_pwm_n_cells = 3;
-	tcbpwm->chip.base = -1;
 	tcbpwm->chip.npwm = NPWM;
 	tcbpwm->channel = channel;
 	tcbpwm->regmap = regmap;
diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c
index 5813339b597b..a4d0be6b265b 100644
--- a/drivers/pwm/pwm-atmel.c
+++ b/drivers/pwm/pwm-atmel.c
@@ -429,7 +429,6 @@ static int atmel_pwm_probe(struct platform_device *pdev)
 	atmel_pwm->chip.ops = &atmel_pwm_ops;
 	atmel_pwm->chip.of_xlate = of_pwm_xlate_with_flags;
 	atmel_pwm->chip.of_pwm_n_cells = 3;
-	atmel_pwm->chip.base = -1;
 	atmel_pwm->chip.npwm = 4;
 
 	ret = pwmchip_add(&atmel_pwm->chip);
diff --git a/drivers/pwm/pwm-bcm-iproc.c b/drivers/pwm/pwm-bcm-iproc.c
index f4853c4a2d75..529a66ab692d 100644
--- a/drivers/pwm/pwm-bcm-iproc.c
+++ b/drivers/pwm/pwm-bcm-iproc.c
@@ -209,7 +209,6 @@ static int iproc_pwmc_probe(struct platform_device *pdev)
 
 	ip->chip.dev = &pdev->dev;
 	ip->chip.ops = &iproc_pwm_ops;
-	ip->chip.base = -1;
 	ip->chip.npwm = 4;
 	ip->chip.of_xlate = of_pwm_xlate_with_flags;
 	ip->chip.of_pwm_n_cells = 3;
diff --git a/drivers/pwm/pwm-bcm-kona.c b/drivers/pwm/pwm-bcm-kona.c
index 578b3621c97e..2e8aede0318c 100644
--- a/drivers/pwm/pwm-bcm-kona.c
+++ b/drivers/pwm/pwm-bcm-kona.c
@@ -271,7 +271,6 @@ static int kona_pwmc_probe(struct platform_device *pdev)
 
 	kp->chip.dev = &pdev->dev;
 	kp->chip.ops = &kona_pwm_ops;
-	kp->chip.base = -1;
 	kp->chip.npwm = 6;
 	kp->chip.of_xlate = of_pwm_xlate_with_flags;
 	kp->chip.of_pwm_n_cells = 3;
diff --git a/drivers/pwm/pwm-bcm2835.c b/drivers/pwm/pwm-bcm2835.c
index d593cce249d9..e4b54675b356 100644
--- a/drivers/pwm/pwm-bcm2835.c
+++ b/drivers/pwm/pwm-bcm2835.c
@@ -158,7 +158,6 @@ static int bcm2835_pwm_probe(struct platform_device *pdev)
 
 	pc->chip.dev = &pdev->dev;
 	pc->chip.ops = &bcm2835_pwm_ops;
-	pc->chip.base = -1;
 	pc->chip.npwm = 2;
 	pc->chip.of_xlate = of_pwm_xlate_with_flags;
 	pc->chip.of_pwm_n_cells = 3;
diff --git a/drivers/pwm/pwm-berlin.c b/drivers/pwm/pwm-berlin.c
index fe405289e582..acb6fbc3cc32 100644
--- a/drivers/pwm/pwm-berlin.c
+++ b/drivers/pwm/pwm-berlin.c
@@ -206,7 +206,6 @@ static int berlin_pwm_probe(struct platform_device *pdev)
 
 	pwm->chip.dev = &pdev->dev;
 	pwm->chip.ops = &berlin_pwm_ops;
-	pwm->chip.base = -1;
 	pwm->chip.npwm = 4;
 	pwm->chip.of_xlate = of_pwm_xlate_with_flags;
 	pwm->chip.of_pwm_n_cells = 3;
diff --git a/drivers/pwm/pwm-brcmstb.c b/drivers/pwm/pwm-brcmstb.c
index 8b66f9d2f589..8b1d1e7aa856 100644
--- a/drivers/pwm/pwm-brcmstb.c
+++ b/drivers/pwm/pwm-brcmstb.c
@@ -258,7 +258,6 @@ static int brcmstb_pwm_probe(struct platform_device *pdev)
 
 	p->chip.dev = &pdev->dev;
 	p->chip.ops = &brcmstb_pwm_ops;
-	p->chip.base = -1;
 	p->chip.npwm = 2;
 
 	p->base = devm_platform_ioremap_resource(pdev, 0);
diff --git a/drivers/pwm/pwm-clps711x.c b/drivers/pwm/pwm-clps711x.c
index cb1af86873ee..f3d17a590305 100644
--- a/drivers/pwm/pwm-clps711x.c
+++ b/drivers/pwm/pwm-clps711x.c
@@ -128,7 +128,6 @@ static int clps711x_pwm_probe(struct platform_device *pdev)
 
 	priv->chip.ops = &clps711x_pwm_ops;
 	priv->chip.dev = &pdev->dev;
-	priv->chip.base = -1;
 	priv->chip.npwm = 2;
 	priv->chip.of_xlate = clps711x_pwm_xlate;
 	priv->chip.of_pwm_n_cells = 1;
diff --git a/drivers/pwm/pwm-crc.c b/drivers/pwm/pwm-crc.c
index 1e2276808b7a..02522a9a3073 100644
--- a/drivers/pwm/pwm-crc.c
+++ b/drivers/pwm/pwm-crc.c
@@ -168,7 +168,6 @@ static int crystalcove_pwm_probe(struct platform_device *pdev)
 
 	pwm->chip.dev = &pdev->dev;
 	pwm->chip.ops = &crc_pwm_ops;
-	pwm->chip.base = -1;
 	pwm->chip.npwm = 1;
 
 	/* get the PMIC regmap */
diff --git a/drivers/pwm/pwm-cros-ec.c b/drivers/pwm/pwm-cros-ec.c
index c1c337969e4e..d3115cb0e058 100644
--- a/drivers/pwm/pwm-cros-ec.c
+++ b/drivers/pwm/pwm-cros-ec.c
@@ -253,7 +253,6 @@ static int cros_ec_pwm_probe(struct platform_device *pdev)
 	chip->ops = &cros_ec_pwm_ops;
 	chip->of_xlate = cros_ec_pwm_xlate;
 	chip->of_pwm_n_cells = 1;
-	chip->base = -1;
 	ret = cros_ec_num_pwms(ec);
 	if (ret < 0) {
 		dev_err(dev, "Couldn't find PWMs: %d\n", ret);
diff --git a/drivers/pwm/pwm-dwc.c b/drivers/pwm/pwm-dwc.c
index f6c98e0d57c2..7568300bb11e 100644
--- a/drivers/pwm/pwm-dwc.c
+++ b/drivers/pwm/pwm-dwc.c
@@ -233,7 +233,6 @@ static int dwc_pwm_probe(struct pci_dev *pci, const struct pci_device_id *id)
 	dwc->chip.dev = dev;
 	dwc->chip.ops = &dwc_pwm_ops;
 	dwc->chip.npwm = DWC_TIMERS_TOTAL;
-	dwc->chip.base = -1;
 
 	ret = pwmchip_add(&dwc->chip);
 	if (ret)
diff --git a/drivers/pwm/pwm-ep93xx.c b/drivers/pwm/pwm-ep93xx.c
index c9fc6f223640..4ca70794ad96 100644
--- a/drivers/pwm/pwm-ep93xx.c
+++ b/drivers/pwm/pwm-ep93xx.c
@@ -185,7 +185,6 @@ static int ep93xx_pwm_probe(struct platform_device *pdev)
 
 	ep93xx_pwm->chip.dev = &pdev->dev;
 	ep93xx_pwm->chip.ops = &ep93xx_pwm_ops;
-	ep93xx_pwm->chip.base = -1;
 	ep93xx_pwm->chip.npwm = 1;
 
 	ret = pwmchip_add(&ep93xx_pwm->chip);
diff --git a/drivers/pwm/pwm-fsl-ftm.c b/drivers/pwm/pwm-fsl-ftm.c
index 2a6801226aba..0e1ae9469eda 100644
--- a/drivers/pwm/pwm-fsl-ftm.c
+++ b/drivers/pwm/pwm-fsl-ftm.c
@@ -453,7 +453,6 @@ static int fsl_pwm_probe(struct platform_device *pdev)
 	fpc->chip.ops = &fsl_pwm_ops;
 	fpc->chip.of_xlate = of_pwm_xlate_with_flags;
 	fpc->chip.of_pwm_n_cells = 3;
-	fpc->chip.base = -1;
 	fpc->chip.npwm = 8;
 
 	ret = pwmchip_add(&fpc->chip);
diff --git a/drivers/pwm/pwm-hibvt.c b/drivers/pwm/pwm-hibvt.c
index a1900d0a872e..82d17fc75c21 100644
--- a/drivers/pwm/pwm-hibvt.c
+++ b/drivers/pwm/pwm-hibvt.c
@@ -205,7 +205,6 @@ static int hibvt_pwm_probe(struct platform_device *pdev)
 
 	pwm_chip->chip.ops = &hibvt_pwm_ops;
 	pwm_chip->chip.dev = &pdev->dev;
-	pwm_chip->chip.base = -1;
 	pwm_chip->chip.npwm = soc->num_pwms;
 	pwm_chip->chip.of_xlate = of_pwm_xlate_with_flags;
 	pwm_chip->chip.of_pwm_n_cells = 3;
diff --git a/drivers/pwm/pwm-img.c b/drivers/pwm/pwm-img.c
index 6faf5b5a5584..cc37054589cc 100644
--- a/drivers/pwm/pwm-img.c
+++ b/drivers/pwm/pwm-img.c
@@ -304,7 +304,6 @@ static int img_pwm_probe(struct platform_device *pdev)
 
 	pwm->chip.dev = &pdev->dev;
 	pwm->chip.ops = &img_pwm_ops;
-	pwm->chip.base = -1;
 	pwm->chip.npwm = IMG_PWM_NPWM;
 
 	ret = pwmchip_add(&pwm->chip);
diff --git a/drivers/pwm/pwm-imx-tpm.c b/drivers/pwm/pwm-imx-tpm.c
index eec9ec4e1a2a..97c9133b6876 100644
--- a/drivers/pwm/pwm-imx-tpm.c
+++ b/drivers/pwm/pwm-imx-tpm.c
@@ -363,7 +363,6 @@ static int pwm_imx_tpm_probe(struct platform_device *pdev)
 
 	tpm->chip.dev = &pdev->dev;
 	tpm->chip.ops = &imx_tpm_pwm_ops;
-	tpm->chip.base = -1;
 	tpm->chip.of_xlate = of_pwm_xlate_with_flags;
 	tpm->chip.of_pwm_n_cells = 3;
 
diff --git a/drivers/pwm/pwm-imx1.c b/drivers/pwm/pwm-imx1.c
index 727e0d3e249e..c957b365448e 100644
--- a/drivers/pwm/pwm-imx1.c
+++ b/drivers/pwm/pwm-imx1.c
@@ -155,7 +155,6 @@ static int pwm_imx1_probe(struct platform_device *pdev)
 
 	imx->chip.ops = &pwm_imx1_ops;
 	imx->chip.dev = &pdev->dev;
-	imx->chip.base = -1;
 	imx->chip.npwm = 1;
 
 	imx->mmio_base = devm_platform_ioremap_resource(pdev, 0);
diff --git a/drivers/pwm/pwm-imx27.c b/drivers/pwm/pwm-imx27.c
index 18055326a2f3..ba695115c160 100644
--- a/drivers/pwm/pwm-imx27.c
+++ b/drivers/pwm/pwm-imx27.c
@@ -327,7 +327,6 @@ static int pwm_imx27_probe(struct platform_device *pdev)
 
 	imx->chip.ops = &pwm_imx27_ops;
 	imx->chip.dev = &pdev->dev;
-	imx->chip.base = -1;
 	imx->chip.npwm = 1;
 
 	imx->chip.of_xlate = of_pwm_xlate_with_flags;
diff --git a/drivers/pwm/pwm-intel-lgm.c b/drivers/pwm/pwm-intel-lgm.c
index e9e54dda07aa..015f5eba09a1 100644
--- a/drivers/pwm/pwm-intel-lgm.c
+++ b/drivers/pwm/pwm-intel-lgm.c
@@ -207,7 +207,6 @@ static int lgm_pwm_probe(struct platform_device *pdev)
 	pc->chip.dev = dev;
 	pc->chip.ops = &lgm_pwm_ops;
 	pc->chip.npwm = 1;
-	pc->chip.base = -1;
 
 	lgm_pwm_init(pc);
 
diff --git a/drivers/pwm/pwm-iqs620a.c b/drivers/pwm/pwm-iqs620a.c
index 957b972c458b..6c6e26d18329 100644
--- a/drivers/pwm/pwm-iqs620a.c
+++ b/drivers/pwm/pwm-iqs620a.c
@@ -206,7 +206,6 @@ static int iqs620_pwm_probe(struct platform_device *pdev)
 
 	iqs620_pwm->chip.dev = &pdev->dev;
 	iqs620_pwm->chip.ops = &iqs620_pwm_ops;
-	iqs620_pwm->chip.base = -1;
 	iqs620_pwm->chip.npwm = 1;
 
 	mutex_init(&iqs620_pwm->lock);
diff --git a/drivers/pwm/pwm-jz4740.c b/drivers/pwm/pwm-jz4740.c
index 00c642fa2eed..5b6bdcdcecf5 100644
--- a/drivers/pwm/pwm-jz4740.c
+++ b/drivers/pwm/pwm-jz4740.c
@@ -244,7 +244,6 @@ static int jz4740_pwm_probe(struct platform_device *pdev)
 	jz4740->chip.dev = dev;
 	jz4740->chip.ops = &jz4740_pwm_ops;
 	jz4740->chip.npwm = info->num_pwms;
-	jz4740->chip.base = -1;
 	jz4740->chip.of_xlate = of_pwm_xlate_with_flags;
 	jz4740->chip.of_pwm_n_cells = 3;
 
diff --git a/drivers/pwm/pwm-keembay.c b/drivers/pwm/pwm-keembay.c
index cdfdef66ff8e..521a825c8ba0 100644
--- a/drivers/pwm/pwm-keembay.c
+++ b/drivers/pwm/pwm-keembay.c
@@ -203,7 +203,6 @@ static int keembay_pwm_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	priv->chip.base = -1;
 	priv->chip.dev = dev;
 	priv->chip.ops = &keembay_pwm_ops;
 	priv->chip.npwm = KMB_TOTAL_PWM_CHANNELS;
diff --git a/drivers/pwm/pwm-lp3943.c b/drivers/pwm/pwm-lp3943.c
index bf3f14fb5f24..7551253ada32 100644
--- a/drivers/pwm/pwm-lp3943.c
+++ b/drivers/pwm/pwm-lp3943.c
@@ -275,7 +275,6 @@ static int lp3943_pwm_probe(struct platform_device *pdev)
 	lp3943_pwm->chip.dev = &pdev->dev;
 	lp3943_pwm->chip.ops = &lp3943_pwm_ops;
 	lp3943_pwm->chip.npwm = LP3943_NUM_PWMS;
-	lp3943_pwm->chip.base = -1;
 
 	platform_set_drvdata(pdev, lp3943_pwm);
 
diff --git a/drivers/pwm/pwm-lpc18xx-sct.c b/drivers/pwm/pwm-lpc18xx-sct.c
index 7ef40243eb6c..3f8e54ec28c6 100644
--- a/drivers/pwm/pwm-lpc18xx-sct.c
+++ b/drivers/pwm/pwm-lpc18xx-sct.c
@@ -370,7 +370,6 @@ static int lpc18xx_pwm_probe(struct platform_device *pdev)
 
 	lpc18xx_pwm->chip.dev = &pdev->dev;
 	lpc18xx_pwm->chip.ops = &lpc18xx_pwm_ops;
-	lpc18xx_pwm->chip.base = -1;
 	lpc18xx_pwm->chip.npwm = 16;
 	lpc18xx_pwm->chip.of_xlate = of_pwm_xlate_with_flags;
 	lpc18xx_pwm->chip.of_pwm_n_cells = 3;
diff --git a/drivers/pwm/pwm-lpc32xx.c b/drivers/pwm/pwm-lpc32xx.c
index 6b4090436c06..c42cc314c170 100644
--- a/drivers/pwm/pwm-lpc32xx.c
+++ b/drivers/pwm/pwm-lpc32xx.c
@@ -116,7 +116,6 @@ static int lpc32xx_pwm_probe(struct platform_device *pdev)
 	lpc32xx->chip.dev = &pdev->dev;
 	lpc32xx->chip.ops = &lpc32xx_pwm_ops;
 	lpc32xx->chip.npwm = 1;
-	lpc32xx->chip.base = -1;
 
 	ret = pwmchip_add(&lpc32xx->chip);
 	if (ret < 0) {
diff --git a/drivers/pwm/pwm-lpss.c b/drivers/pwm/pwm-lpss.c
index 939de93c157b..9ea6a176cbe5 100644
--- a/drivers/pwm/pwm-lpss.c
+++ b/drivers/pwm/pwm-lpss.c
@@ -234,7 +234,6 @@ struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r,
 
 	lpwm->chip.dev = dev;
 	lpwm->chip.ops = &pwm_lpss_ops;
-	lpwm->chip.base = -1;
 	lpwm->chip.npwm = info->npwm;
 
 	ret = pwmchip_add(&lpwm->chip);
diff --git a/drivers/pwm/pwm-mediatek.c b/drivers/pwm/pwm-mediatek.c
index fcfc3b147e5f..87fb37d43814 100644
--- a/drivers/pwm/pwm-mediatek.c
+++ b/drivers/pwm/pwm-mediatek.c
@@ -263,7 +263,6 @@ static int pwm_mediatek_probe(struct platform_device *pdev)
 
 	pc->chip.dev = &pdev->dev;
 	pc->chip.ops = &pwm_mediatek_ops;
-	pc->chip.base = -1;
 	pc->chip.npwm = pc->soc->num_pwms;
 
 	ret = pwmchip_add(&pc->chip);
diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c
index a3ce9789412a..9eb060613cb4 100644
--- a/drivers/pwm/pwm-meson.c
+++ b/drivers/pwm/pwm-meson.c
@@ -550,7 +550,6 @@ static int meson_pwm_probe(struct platform_device *pdev)
 	spin_lock_init(&meson->lock);
 	meson->chip.dev = &pdev->dev;
 	meson->chip.ops = &meson_pwm_ops;
-	meson->chip.base = -1;
 	meson->chip.npwm = MESON_NUM_PWMS;
 	meson->chip.of_xlate = of_pwm_xlate_with_flags;
 	meson->chip.of_pwm_n_cells = 3;
diff --git a/drivers/pwm/pwm-mtk-disp.c b/drivers/pwm/pwm-mtk-disp.c
index 87c6b4bc5d43..9b3ba401a3db 100644
--- a/drivers/pwm/pwm-mtk-disp.c
+++ b/drivers/pwm/pwm-mtk-disp.c
@@ -202,7 +202,6 @@ static int mtk_disp_pwm_probe(struct platform_device *pdev)
 
 	mdp->chip.dev = &pdev->dev;
 	mdp->chip.ops = &mtk_disp_pwm_ops;
-	mdp->chip.base = -1;
 	mdp->chip.npwm = 1;
 
 	ret = pwmchip_add(&mdp->chip);
diff --git a/drivers/pwm/pwm-mxs.c b/drivers/pwm/pwm-mxs.c
index 7ce616923c52..0266e84e982c 100644
--- a/drivers/pwm/pwm-mxs.c
+++ b/drivers/pwm/pwm-mxs.c
@@ -140,7 +140,6 @@ static int mxs_pwm_probe(struct platform_device *pdev)
 	mxs->chip.ops = &mxs_pwm_ops;
 	mxs->chip.of_xlate = of_pwm_xlate_with_flags;
 	mxs->chip.of_pwm_n_cells = 3;
-	mxs->chip.base = -1;
 
 	ret = of_property_read_u32(np, "fsl,pwm-number", &mxs->chip.npwm);
 	if (ret < 0) {
diff --git a/drivers/pwm/pwm-omap-dmtimer.c b/drivers/pwm/pwm-omap-dmtimer.c
index 358db4ff9d4f..612b3c859295 100644
--- a/drivers/pwm/pwm-omap-dmtimer.c
+++ b/drivers/pwm/pwm-omap-dmtimer.c
@@ -403,7 +403,6 @@ static int pwm_omap_dmtimer_probe(struct platform_device *pdev)
 
 	omap->chip.dev = &pdev->dev;
 	omap->chip.ops = &pwm_omap_dmtimer_ops;
-	omap->chip.base = -1;
 	omap->chip.npwm = 1;
 	omap->chip.of_xlate = of_pwm_xlate_with_flags;
 	omap->chip.of_pwm_n_cells = 3;
diff --git a/drivers/pwm/pwm-pca9685.c b/drivers/pwm/pwm-pca9685.c
index 4a55dc18656c..00976b2c57b2 100644
--- a/drivers/pwm/pwm-pca9685.c
+++ b/drivers/pwm/pwm-pca9685.c
@@ -493,7 +493,6 @@ static int pca9685_pwm_probe(struct i2c_client *client,
 	pca->chip.npwm = PCA9685_MAXCHAN + 1;
 
 	pca->chip.dev = &client->dev;
-	pca->chip.base = -1;
 
 	ret = pwmchip_add(&pca->chip);
 	if (ret < 0)
diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c
index d06cf60e6575..cfb683827d32 100644
--- a/drivers/pwm/pwm-pxa.c
+++ b/drivers/pwm/pwm-pxa.c
@@ -184,7 +184,6 @@ static int pwm_probe(struct platform_device *pdev)
 
 	pwm->chip.dev = &pdev->dev;
 	pwm->chip.ops = &pxa_pwm_ops;
-	pwm->chip.base = -1;
 	pwm->chip.npwm = (id->driver_data & HAS_SECONDARY_PWM) ? 2 : 1;
 
 	if (IS_ENABLED(CONFIG_OF)) {
diff --git a/drivers/pwm/pwm-rcar.c b/drivers/pwm/pwm-rcar.c
index 002ab79a7ec2..9daca0c772c7 100644
--- a/drivers/pwm/pwm-rcar.c
+++ b/drivers/pwm/pwm-rcar.c
@@ -224,7 +224,6 @@ static int rcar_pwm_probe(struct platform_device *pdev)
 
 	rcar_pwm->chip.dev = &pdev->dev;
 	rcar_pwm->chip.ops = &rcar_pwm_ops;
-	rcar_pwm->chip.base = -1;
 	rcar_pwm->chip.npwm = 1;
 
 	pm_runtime_enable(&pdev->dev);
diff --git a/drivers/pwm/pwm-renesas-tpu.c b/drivers/pwm/pwm-renesas-tpu.c
index d02b24b77cdf..e2959fae0969 100644
--- a/drivers/pwm/pwm-renesas-tpu.c
+++ b/drivers/pwm/pwm-renesas-tpu.c
@@ -410,7 +410,6 @@ static int tpu_probe(struct platform_device *pdev)
 	tpu->chip.ops = &tpu_pwm_ops;
 	tpu->chip.of_xlate = of_pwm_xlate_with_flags;
 	tpu->chip.of_pwm_n_cells = 3;
-	tpu->chip.base = -1;
 	tpu->chip.npwm = TPU_CHANNEL_MAX;
 
 	pm_runtime_enable(&pdev->dev);
diff --git a/drivers/pwm/pwm-rockchip.c b/drivers/pwm/pwm-rockchip.c
index 6ad7d0a50aed..301785fa293e 100644
--- a/drivers/pwm/pwm-rockchip.c
+++ b/drivers/pwm/pwm-rockchip.c
@@ -352,7 +352,6 @@ static int rockchip_pwm_probe(struct platform_device *pdev)
 	pc->data = id->data;
 	pc->chip.dev = &pdev->dev;
 	pc->chip.ops = &rockchip_pwm_ops;
-	pc->chip.base = -1;
 	pc->chip.npwm = 1;
 
 	if (pc->data->supports_polarity) {
diff --git a/drivers/pwm/pwm-samsung.c b/drivers/pwm/pwm-samsung.c
index 645d0066ff0a..515489fa4f6d 100644
--- a/drivers/pwm/pwm-samsung.c
+++ b/drivers/pwm/pwm-samsung.c
@@ -519,7 +519,6 @@ static int pwm_samsung_probe(struct platform_device *pdev)
 
 	chip->chip.dev = &pdev->dev;
 	chip->chip.ops = &pwm_samsung_ops;
-	chip->chip.base = -1;
 	chip->chip.npwm = SAMSUNG_PWM_NUM;
 	chip->inverter_mask = BIT(SAMSUNG_PWM_NUM) - 1;
 
diff --git a/drivers/pwm/pwm-sifive.c b/drivers/pwm/pwm-sifive.c
index 2a7cd2deaeea..688737f091ac 100644
--- a/drivers/pwm/pwm-sifive.c
+++ b/drivers/pwm/pwm-sifive.c
@@ -244,7 +244,6 @@ static int pwm_sifive_probe(struct platform_device *pdev)
 	chip->ops = &pwm_sifive_ops;
 	chip->of_xlate = of_pwm_xlate_with_flags;
 	chip->of_pwm_n_cells = 3;
-	chip->base = -1;
 	chip->npwm = 4;
 
 	ddata->regs = devm_platform_ioremap_resource(pdev, 0);
diff --git a/drivers/pwm/pwm-sl28cpld.c b/drivers/pwm/pwm-sl28cpld.c
index 0b01ec25e2f0..7a69c1a0c060 100644
--- a/drivers/pwm/pwm-sl28cpld.c
+++ b/drivers/pwm/pwm-sl28cpld.c
@@ -229,7 +229,6 @@ static int sl28cpld_pwm_probe(struct platform_device *pdev)
 	chip = &priv->pwm_chip;
 	chip->dev = &pdev->dev;
 	chip->ops = &sl28cpld_pwm_ops;
-	chip->base = -1;
 	chip->npwm = 1;
 
 	platform_set_drvdata(pdev, priv);
diff --git a/drivers/pwm/pwm-spear.c b/drivers/pwm/pwm-spear.c
index f63b54aae1b4..1a1cedfd11ce 100644
--- a/drivers/pwm/pwm-spear.c
+++ b/drivers/pwm/pwm-spear.c
@@ -193,7 +193,6 @@ static int spear_pwm_probe(struct platform_device *pdev)
 
 	pc->chip.dev = &pdev->dev;
 	pc->chip.ops = &spear_pwm_ops;
-	pc->chip.base = -1;
 	pc->chip.npwm = NUM_PWM;
 
 	ret = clk_prepare(pc->clk);
diff --git a/drivers/pwm/pwm-sprd.c b/drivers/pwm/pwm-sprd.c
index 5123d948efd6..108cbec88667 100644
--- a/drivers/pwm/pwm-sprd.c
+++ b/drivers/pwm/pwm-sprd.c
@@ -268,7 +268,6 @@ static int sprd_pwm_probe(struct platform_device *pdev)
 
 	spc->chip.dev = &pdev->dev;
 	spc->chip.ops = &sprd_pwm_ops;
-	spc->chip.base = -1;
 	spc->chip.npwm = spc->num_pwms;
 
 	ret = pwmchip_add(&spc->chip);
diff --git a/drivers/pwm/pwm-sti.c b/drivers/pwm/pwm-sti.c
index 99c70e07858d..aa2b211d7ee3 100644
--- a/drivers/pwm/pwm-sti.c
+++ b/drivers/pwm/pwm-sti.c
@@ -619,7 +619,6 @@ static int sti_pwm_probe(struct platform_device *pdev)
 
 	pc->chip.dev = dev;
 	pc->chip.ops = &sti_pwm_ops;
-	pc->chip.base = -1;
 	pc->chip.npwm = pc->cdata->pwm_num_devs;
 
 	ret = pwmchip_add(&pc->chip);
diff --git a/drivers/pwm/pwm-stm32-lp.c b/drivers/pwm/pwm-stm32-lp.c
index 134c14621ee0..af08f564ef1d 100644
--- a/drivers/pwm/pwm-stm32-lp.c
+++ b/drivers/pwm/pwm-stm32-lp.c
@@ -205,7 +205,6 @@ static int stm32_pwm_lp_probe(struct platform_device *pdev)
 
 	priv->regmap = ddata->regmap;
 	priv->clk = ddata->clk;
-	priv->chip.base = -1;
 	priv->chip.dev = &pdev->dev;
 	priv->chip.ops = &stm32_pwm_lp_ops;
 	priv->chip.npwm = 1;
diff --git a/drivers/pwm/pwm-stm32.c b/drivers/pwm/pwm-stm32.c
index d3be944f2ae9..c46fb90036ab 100644
--- a/drivers/pwm/pwm-stm32.c
+++ b/drivers/pwm/pwm-stm32.c
@@ -633,7 +633,6 @@ static int stm32_pwm_probe(struct platform_device *pdev)
 
 	stm32_pwm_detect_complementary(priv);
 
-	priv->chip.base = -1;
 	priv->chip.dev = dev;
 	priv->chip.ops = &stm32pwm_ops;
 	priv->chip.npwm = stm32_pwm_detect_channels(priv);
diff --git a/drivers/pwm/pwm-stmpe.c b/drivers/pwm/pwm-stmpe.c
index be5f6d7359d4..9dc983a3cbf1 100644
--- a/drivers/pwm/pwm-stmpe.c
+++ b/drivers/pwm/pwm-stmpe.c
@@ -278,7 +278,6 @@ static int __init stmpe_pwm_probe(struct platform_device *pdev)
 
 	pwm->stmpe = stmpe;
 	pwm->chip.dev = &pdev->dev;
-	pwm->chip.base = -1;
 
 	if (stmpe->partnum == STMPE2401 || stmpe->partnum == STMPE2403) {
 		pwm->chip.ops = &stmpe_24xx_pwm_ops;
diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c
index ce5c4fc8da6f..e01becd102c0 100644
--- a/drivers/pwm/pwm-sun4i.c
+++ b/drivers/pwm/pwm-sun4i.c
@@ -459,7 +459,6 @@ static int sun4i_pwm_probe(struct platform_device *pdev)
 
 	pwm->chip.dev = &pdev->dev;
 	pwm->chip.ops = &sun4i_pwm_ops;
-	pwm->chip.base = -1;
 	pwm->chip.npwm = pwm->data->npwm;
 	pwm->chip.of_xlate = of_pwm_xlate_with_flags;
 	pwm->chip.of_pwm_n_cells = 3;
diff --git a/drivers/pwm/pwm-tegra.c b/drivers/pwm/pwm-tegra.c
index 55bc63d5a0ae..c529a170bcdd 100644
--- a/drivers/pwm/pwm-tegra.c
+++ b/drivers/pwm/pwm-tegra.c
@@ -285,7 +285,6 @@ static int tegra_pwm_probe(struct platform_device *pdev)
 
 	pwm->chip.dev = &pdev->dev;
 	pwm->chip.ops = &tegra_pwm_ops;
-	pwm->chip.base = -1;
 	pwm->chip.npwm = pwm->soc->num_channels;
 
 	ret = pwmchip_add(&pwm->chip);
diff --git a/drivers/pwm/pwm-tiecap.c b/drivers/pwm/pwm-tiecap.c
index 2a8949014bb1..b9a17ab0c202 100644
--- a/drivers/pwm/pwm-tiecap.c
+++ b/drivers/pwm/pwm-tiecap.c
@@ -226,7 +226,6 @@ static int ecap_pwm_probe(struct platform_device *pdev)
 	pc->chip.ops = &ecap_pwm_ops;
 	pc->chip.of_xlate = of_pwm_xlate_with_flags;
 	pc->chip.of_pwm_n_cells = 3;
-	pc->chip.base = -1;
 	pc->chip.npwm = 1;
 
 	pc->mmio_base = devm_platform_ioremap_resource(pdev, 0);
diff --git a/drivers/pwm/pwm-tiehrpwm.c b/drivers/pwm/pwm-tiehrpwm.c
index a7fb224d6535..90095a19bf2d 100644
--- a/drivers/pwm/pwm-tiehrpwm.c
+++ b/drivers/pwm/pwm-tiehrpwm.c
@@ -449,7 +449,6 @@ static int ehrpwm_pwm_probe(struct platform_device *pdev)
 	pc->chip.ops = &ehrpwm_pwm_ops;
 	pc->chip.of_xlate = of_pwm_xlate_with_flags;
 	pc->chip.of_pwm_n_cells = 3;
-	pc->chip.base = -1;
 	pc->chip.npwm = NUM_PWM_CHANNEL;
 
 	pc->mmio_base = devm_platform_ioremap_resource(pdev, 0);
diff --git a/drivers/pwm/pwm-twl-led.c b/drivers/pwm/pwm-twl-led.c
index 630b9a578820..6c8df5f4e87d 100644
--- a/drivers/pwm/pwm-twl-led.c
+++ b/drivers/pwm/pwm-twl-led.c
@@ -291,7 +291,6 @@ static int twl_pwmled_probe(struct platform_device *pdev)
 	}
 
 	twl->chip.dev = &pdev->dev;
-	twl->chip.base = -1;
 
 	mutex_init(&twl->mutex);
 
diff --git a/drivers/pwm/pwm-twl.c b/drivers/pwm/pwm-twl.c
index aee67974f353..e83a826bf621 100644
--- a/drivers/pwm/pwm-twl.c
+++ b/drivers/pwm/pwm-twl.c
@@ -310,7 +310,6 @@ static int twl_pwm_probe(struct platform_device *pdev)
 		twl->chip.ops = &twl6030_pwm_ops;
 
 	twl->chip.dev = &pdev->dev;
-	twl->chip.base = -1;
 	twl->chip.npwm = 2;
 
 	mutex_init(&twl->mutex);
diff --git a/drivers/pwm/pwm-vt8500.c b/drivers/pwm/pwm-vt8500.c
index 6e36851a22bb..52fe5d19473a 100644
--- a/drivers/pwm/pwm-vt8500.c
+++ b/drivers/pwm/pwm-vt8500.c
@@ -209,7 +209,6 @@ static int vt8500_pwm_probe(struct platform_device *pdev)
 	chip->chip.ops = &vt8500_pwm_ops;
 	chip->chip.of_xlate = of_pwm_xlate_with_flags;
 	chip->chip.of_pwm_n_cells = 3;
-	chip->chip.base = -1;
 	chip->chip.npwm = VT8500_NR_PWMS;
 
 	chip->clk = devm_clk_get(&pdev->dev, NULL);
-- 
cgit v1.2.3


From d58cb0ee51ef58acc80f984407979fd5926da9e5 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Mon, 1 Mar 2021 19:23:07 +0100
Subject: pwm: Return -EINVAL for old-style drivers without .set_polarity
 callback
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Since commit 2b1c1a5d5148 ("pwm: Use -EINVAL for unsupported polarity")
all drivers implementing the apply callback are unified to return
-EINVAL if an unsupported polarity is requested. Do the same in the
compat code for old-style drivers.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 8904eaa6d769..25ee06a14bb3 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -596,7 +596,7 @@ int pwm_apply_state(struct pwm_device *pwm, const struct pwm_state *state)
 		 */
 		if (state->polarity != pwm->state.polarity) {
 			if (!chip->ops->set_polarity)
-				return -ENOTSUPP;
+				return -EINVAL;
 
 			/*
 			 * Changing the polarity of a running PWM is
-- 
cgit v1.2.3


From 30882cf130078e6ba7d84d6d56e056b8b5e705d5 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Mon, 8 Mar 2021 10:50:12 +0100
Subject: pwm: atmel-tcb: Implement .apply callback
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This is just pushing down the core's compat code down into the driver using
the legacy callback nearly unchanged. The call to .enable() was just
dropped from .config() because .apply() calls it unconditionally.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-atmel-tcb.c | 33 +++++++++++++++++++++++++--------
 1 file changed, 25 insertions(+), 8 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-atmel-tcb.c b/drivers/pwm/pwm-atmel-tcb.c
index ee70a615532b..4d2253f3048c 100644
--- a/drivers/pwm/pwm-atmel-tcb.c
+++ b/drivers/pwm/pwm-atmel-tcb.c
@@ -362,20 +362,37 @@ static int atmel_tcb_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
 	tcbpwm->div = i;
 	tcbpwm->duty = duty;
 
-	/* If the PWM is enabled, call enable to apply the new conf */
-	if (pwm_is_enabled(pwm))
-		atmel_tcb_pwm_enable(chip, pwm);
-
 	return 0;
 }
 
+static int atmel_tcb_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+			       const struct pwm_state *state)
+{
+	int duty_cycle, period;
+	int ret;
+
+	/* This function only sets a flag in driver data */
+	atmel_tcb_pwm_set_polarity(chip, pwm, state->polarity);
+
+	if (!state->enabled) {
+		atmel_tcb_pwm_disable(chip, pwm);
+		return 0;
+	}
+
+	period = state->period < INT_MAX ? state->period : INT_MAX;
+	duty_cycle = state->duty_cycle < INT_MAX ? state->duty_cycle : INT_MAX;
+
+	ret = atmel_tcb_pwm_config(chip, pwm, duty_cycle, period);
+	if (ret)
+		return ret;
+
+	return atmel_tcb_pwm_enable(chip, pwm);
+}
+
 static const struct pwm_ops atmel_tcb_pwm_ops = {
 	.request = atmel_tcb_pwm_request,
 	.free = atmel_tcb_pwm_free,
-	.config = atmel_tcb_pwm_config,
-	.set_polarity = atmel_tcb_pwm_set_polarity,
-	.enable = atmel_tcb_pwm_enable,
-	.disable = atmel_tcb_pwm_disable,
+	.apply = atmel_tcb_pwm_apply,
 	.owner = THIS_MODULE,
 };
 
-- 
cgit v1.2.3


From c77e99f434c29d79505bd740cfead9648dfe0795 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Mon, 8 Mar 2021 10:51:50 +0100
Subject: pwm: atmel-tcb: Only free resources after pwm_chip_remove() returned
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Otherwise the PWM stops working before the PWM core and its consumers
are aware the device is going away.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-atmel-tcb.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-atmel-tcb.c b/drivers/pwm/pwm-atmel-tcb.c
index 4d2253f3048c..8451d3e846be 100644
--- a/drivers/pwm/pwm-atmel-tcb.c
+++ b/drivers/pwm/pwm-atmel-tcb.c
@@ -507,14 +507,14 @@ static int atmel_tcb_pwm_remove(struct platform_device *pdev)
 	struct atmel_tcb_pwm_chip *tcbpwm = platform_get_drvdata(pdev);
 	int err;
 
-	clk_disable_unprepare(tcbpwm->slow_clk);
-	clk_put(tcbpwm->slow_clk);
-	clk_put(tcbpwm->clk);
-
 	err = pwmchip_remove(&tcbpwm->chip);
 	if (err < 0)
 		return err;
 
+	clk_disable_unprepare(tcbpwm->slow_clk);
+	clk_put(tcbpwm->slow_clk);
+	clk_put(tcbpwm->clk);
+
 	return 0;
 }
 
-- 
cgit v1.2.3


From 09081c9ba6c22bd63b6ce681e60d71a95acbc115 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Fri, 12 Mar 2021 09:59:16 +0100
Subject: pwm: sprd: Refuse requests with unsupported polarity
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The driver only supports normal polarity and so should refuse requests
for inversed polarity.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-sprd.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-sprd.c b/drivers/pwm/pwm-sprd.c
index 108cbec88667..98c479dfae31 100644
--- a/drivers/pwm/pwm-sprd.c
+++ b/drivers/pwm/pwm-sprd.c
@@ -164,6 +164,9 @@ static int sprd_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 	struct pwm_state *cstate = &pwm->state;
 	int ret;
 
+	if (state->polarity != PWM_POLARITY_NORMAL)
+		return -EINVAL;
+
 	if (state->enabled) {
 		if (!cstate->enabled) {
 			/*
-- 
cgit v1.2.3


From 9f0f6107e07289c99f599d4e4ad9c62dec4abfd6 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Fri, 12 Mar 2021 10:00:58 +0100
Subject: pwm: cros-ec: Refuse requests with unsupported polarity
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The driver only supports normal polarity and so should refuse requests
for inversed polarity.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-cros-ec.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-cros-ec.c b/drivers/pwm/pwm-cros-ec.c
index d3115cb0e058..9fffb566af5f 100644
--- a/drivers/pwm/pwm-cros-ec.c
+++ b/drivers/pwm/pwm-cros-ec.c
@@ -124,6 +124,9 @@ static int cros_ec_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 	if (state->period != EC_PWM_MAX_DUTY)
 		return -EINVAL;
 
+	if (state->polarity != PWM_POLARITY_NORMAL)
+		return -EINVAL;
+
 	/*
 	 * EC doesn't separate the concept of duty cycle and enabled, but
 	 * kernel does. Translate.
-- 
cgit v1.2.3


From fc423f29f718a963a2775edba8ac258e762ea989 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <uwe@kleine-koenig.org>
Date: Mon, 7 Dec 2020 14:45:54 +0100
Subject: pwm: bcm-kona: Use pwmchip_add() instead of
 pwmchip_add_with_polarity()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The only side effect of this change is that pwm->state.polarity is
initialized to PWM_POLARITY_NORMAL instead of PWM_POLARITY_INVERSED.
However all other members of pwm->state are uninitialized and consumers
are expected to provide the right polarity (either by setting it explicitly
or by using a helper like pwm_init_state() that overwrites .polarity
anyhow with a value independent of the initial value).

The eventual goal is to remove pwmchip_add_with_polarity() and so simplify
the data flow in the PWM core.

Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-bcm-kona.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-bcm-kona.c b/drivers/pwm/pwm-bcm-kona.c
index 2e8aede0318c..f09a31042859 100644
--- a/drivers/pwm/pwm-bcm-kona.c
+++ b/drivers/pwm/pwm-bcm-kona.c
@@ -300,7 +300,7 @@ static int kona_pwmc_probe(struct platform_device *pdev)
 
 	clk_disable_unprepare(kp->clk);
 
-	ret = pwmchip_add_with_polarity(&kp->chip, PWM_POLARITY_INVERSED);
+	ret = pwmchip_add(&kp->chip);
 	if (ret < 0)
 		dev_err(&pdev->dev, "failed to add PWM chip: %d\n", ret);
 
-- 
cgit v1.2.3


From 965ebe39c953a8248a45413c25833621529da03c Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <uwe@kleine-koenig.org>
Date: Mon, 7 Dec 2020 14:45:55 +0100
Subject: pwm: atmel-hlcdc: Use pwmchip_add() instead of
 pwmchip_add_with_polarity()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The only side effect of this change is that pwm->state.polarity is
initialized to PWM_POLARITY_NORMAL instead of PWM_POLARITY_INVERSED.
However all other members of pwm->state are uninitialized and consumers
are expected to provide the right polarity (either by setting it explicitly
or by using a helper like pwm_init_state() that overwrites .polarity
anyhow with a value independent of the initial value).

Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-atmel-hlcdc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-atmel-hlcdc.c b/drivers/pwm/pwm-atmel-hlcdc.c
index 538dbafe3e75..6ab597e54005 100644
--- a/drivers/pwm/pwm-atmel-hlcdc.c
+++ b/drivers/pwm/pwm-atmel-hlcdc.c
@@ -269,7 +269,7 @@ static int atmel_hlcdc_pwm_probe(struct platform_device *pdev)
 	chip->chip.of_xlate = of_pwm_xlate_with_flags;
 	chip->chip.of_pwm_n_cells = 3;
 
-	ret = pwmchip_add_with_polarity(&chip->chip, PWM_POLARITY_INVERSED);
+	ret = pwmchip_add(&chip->chip);
 	if (ret) {
 		clk_disable_unprepare(hlcdc->periph_clk);
 		return ret;
-- 
cgit v1.2.3


From 9666cec380d60808eb86d3be4caf84faeebe3081 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <uwe@kleine-koenig.org>
Date: Mon, 7 Dec 2020 14:45:56 +0100
Subject: pwm: Drop function pwmchip_add_with_polarity()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

pwmchip_add() only calls pwmchip_add_with_polarity() and nothing else. All
other users of pwmchip_add_with_polarity() are gone. So drop
pwmchip_add_with_polarity() and move the code instead to pwmchip_add().

The initial assignment to pwm->state.polarity is dropped. In every correct
usage of the PWM API this value is overwritten later anyhow.

Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/core.c  | 25 +++----------------------
 include/linux/pwm.h |  2 --
 2 files changed, 3 insertions(+), 24 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 25ee06a14bb3..c4d5c0667137 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -250,17 +250,14 @@ static bool pwm_ops_check(const struct pwm_chip *chip)
 }
 
 /**
- * pwmchip_add_with_polarity() - register a new PWM chip
+ * pwmchip_add() - register a new PWM chip
  * @chip: the PWM chip to add
- * @polarity: initial polarity of PWM channels
  *
- * Register a new PWM chip. The initial polarity for all channels is specified
- * by the @polarity parameter.
+ * Register a new PWM chip.
  *
  * Returns: 0 on success or a negative error code on failure.
  */
-int pwmchip_add_with_polarity(struct pwm_chip *chip,
-			      enum pwm_polarity polarity)
+int pwmchip_add(struct pwm_chip *chip)
 {
 	struct pwm_device *pwm;
 	unsigned int i;
@@ -292,7 +289,6 @@ int pwmchip_add_with_polarity(struct pwm_chip *chip,
 		pwm->chip = chip;
 		pwm->pwm = chip->base + i;
 		pwm->hwpwm = i;
-		pwm->state.polarity = polarity;
 
 		radix_tree_insert(&pwm_tree, pwm->pwm, pwm);
 	}
@@ -315,21 +311,6 @@ out:
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(pwmchip_add_with_polarity);
-
-/**
- * pwmchip_add() - register a new PWM chip
- * @chip: the PWM chip to add
- *
- * Register a new PWM chip. If chip->base < 0 then a dynamically assigned base
- * will be used. The initial polarity for all channels is normal.
- *
- * Returns: 0 on success or a negative error code on failure.
- */
-int pwmchip_add(struct pwm_chip *chip)
-{
-	return pwmchip_add_with_polarity(chip, PWM_POLARITY_NORMAL);
-}
 EXPORT_SYMBOL_GPL(pwmchip_add);
 
 /**
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index e4d84d4db293..8f4eefd129aa 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -392,8 +392,6 @@ int pwm_capture(struct pwm_device *pwm, struct pwm_capture *result,
 int pwm_set_chip_data(struct pwm_device *pwm, void *data);
 void *pwm_get_chip_data(struct pwm_device *pwm);
 
-int pwmchip_add_with_polarity(struct pwm_chip *chip,
-			      enum pwm_polarity polarity);
 int pwmchip_add(struct pwm_chip *chip);
 int pwmchip_remove(struct pwm_chip *chip);
 struct pwm_device *pwm_request_from_chip(struct pwm_chip *chip,
-- 
cgit v1.2.3


From d895ce703098fe4939b081026d77afccddec44df Mon Sep 17 00:00:00 2001
From: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Date: Sun, 7 Feb 2021 23:16:04 +0100
Subject: PCI: tegra: Constify static structs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The only usage of them is to assign their address to the 'ops' field in
the pcie_port and the dw_pcie_ep structs, both which are pointers to
const. Make them const to allow the compiler to put them in read-only
memory.

Link: https://lore.kernel.org/r/20210207221604.48910-1-rikard.falkeborn@gmail.com
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
---
 drivers/pci/controller/dwc/pcie-tegra194.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index 6fa216e52d14..18acd48e8e9b 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -1019,7 +1019,7 @@ static const struct dw_pcie_ops tegra_dw_pcie_ops = {
 	.stop_link = tegra_pcie_dw_stop_link,
 };
 
-static struct dw_pcie_host_ops tegra_pcie_dw_host_ops = {
+static const struct dw_pcie_host_ops tegra_pcie_dw_host_ops = {
 	.host_init = tegra_pcie_dw_host_init,
 };
 
@@ -1881,7 +1881,7 @@ tegra_pcie_ep_get_features(struct dw_pcie_ep *ep)
 	return &tegra_pcie_epc_features;
 }
 
-static struct dw_pcie_ep_ops pcie_ep_ops = {
+static const struct dw_pcie_ep_ops pcie_ep_ops = {
 	.raise_irq = tegra_pcie_ep_raise_irq,
 	.get_features = tegra_pcie_ep_get_features,
 };
-- 
cgit v1.2.3


From 9b4a824b889e1cc5e0430b80e40cfe9838c5b5f0 Mon Sep 17 00:00:00 2001
From: Jon Derrick <jonathan.derrick@intel.com>
Date: Wed, 10 Feb 2021 09:13:14 -0700
Subject: iommu/vt-d: Use Real PCI DMA device for IRTE

VMD retransmits child device MSI-X with the VMD endpoint's requester-id.
In order to support direct interrupt remapping of VMD child devices,
ensure that the IRTE is programmed with the VMD endpoint's requester-id
using pci_real_dma_dev().

Link: https://lore.kernel.org/r/20210210161315.316097-2-jonathan.derrick@intel.com
Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/intel/irq_remapping.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 611ef5243cb6..75429a5373ec 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1280,7 +1280,8 @@ static void intel_irq_remapping_prepare_irte(struct intel_ir_data *data,
 		break;
 	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
 	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
-		set_msi_sid(irte, msi_desc_to_pci_dev(info->desc));
+		set_msi_sid(irte,
+			    pci_real_dma_dev(msi_desc_to_pci_dev(info->desc)));
 		break;
 	default:
 		BUG_ON(1);
-- 
cgit v1.2.3


From ee81ee84f8739e584c9ccf113ba3c796187b7080 Mon Sep 17 00:00:00 2001
From: Jon Derrick <jonathan.derrick@intel.com>
Date: Wed, 10 Feb 2021 09:13:15 -0700
Subject: PCI: vmd: Disable MSI-X remapping when possible
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

VMD will retransmit child device MSI-X using its own MSI-X table and
requester-id. This limits the number of MSI-X available to the whole
child device domain to the number of VMD MSI-X interrupts.

Some VMD devices have a mode where this remapping can be disabled,
allowing child device interrupts to bypass processing with the VMD MSI-X
domain interrupt handler and going straight the child device interrupt
handler, allowing for better performance and scaling. The requester-id
still gets changed to the VMD endpoint's requester-id, and the interrupt
remapping handlers have been updated to properly set IRTE for child
device interrupts to the VMD endpoint's context.

Some VMD platforms have existing production BIOS which rely on MSI-X
remapping and won't explicitly program the MSI-X remapping bit. This
re-enables MSI-X remapping on unload.

Link: https://lore.kernel.org/r/20210210161315.316097-3-jonathan.derrick@intel.com
Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/pci/controller/vmd.c | 63 +++++++++++++++++++++++++++++++++++---------
 1 file changed, 51 insertions(+), 12 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c
index 5e80f28f0119..e3fcdfec58b3 100644
--- a/drivers/pci/controller/vmd.c
+++ b/drivers/pci/controller/vmd.c
@@ -28,6 +28,7 @@
 #define BUS_RESTRICT_CAP(vmcap)	(vmcap & 0x1)
 #define PCI_REG_VMCONFIG	0x44
 #define BUS_RESTRICT_CFG(vmcfg)	((vmcfg >> 8) & 0x3)
+#define VMCONFIG_MSI_REMAP	0x2
 #define PCI_REG_VMLOCK		0x70
 #define MB2_SHADOW_EN(vmlock)	(vmlock & 0x2)
 
@@ -59,6 +60,13 @@ enum vmd_features {
 	 * be used for MSI remapping
 	 */
 	VMD_FEAT_OFFSET_FIRST_VECTOR		= (1 << 3),
+
+	/*
+	 * Device can bypass remapping MSI-X transactions into its MSI-X table,
+	 * avoiding the requirement of a VMD MSI domain for child device
+	 * interrupt handling.
+	 */
+	VMD_FEAT_CAN_BYPASS_MSI_REMAP		= (1 << 4),
 };
 
 /*
@@ -306,6 +314,16 @@ static struct msi_domain_info vmd_msi_domain_info = {
 	.chip		= &vmd_msi_controller,
 };
 
+static void vmd_set_msi_remapping(struct vmd_dev *vmd, bool enable)
+{
+	u16 reg;
+
+	pci_read_config_word(vmd->dev, PCI_REG_VMCONFIG, &reg);
+	reg = enable ? (reg & ~VMCONFIG_MSI_REMAP) :
+		       (reg | VMCONFIG_MSI_REMAP);
+	pci_write_config_word(vmd->dev, PCI_REG_VMCONFIG, reg);
+}
+
 static int vmd_create_irq_domain(struct vmd_dev *vmd)
 {
 	struct fwnode_handle *fn;
@@ -325,6 +343,13 @@ static int vmd_create_irq_domain(struct vmd_dev *vmd)
 
 static void vmd_remove_irq_domain(struct vmd_dev *vmd)
 {
+	/*
+	 * Some production BIOS won't enable remapping between soft reboots.
+	 * Ensure remapping is restored before unloading the driver.
+	 */
+	if (!vmd->msix_count)
+		vmd_set_msi_remapping(vmd, true);
+
 	if (vmd->irq_domain) {
 		struct fwnode_handle *fn = vmd->irq_domain->fwnode;
 
@@ -679,15 +704,32 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features)
 
 	sd->node = pcibus_to_node(vmd->dev->bus);
 
-	ret = vmd_create_irq_domain(vmd);
-	if (ret)
-		return ret;
-
 	/*
-	 * Override the irq domain bus token so the domain can be distinguished
-	 * from a regular PCI/MSI domain.
+	 * Currently MSI remapping must be enabled in guest passthrough mode
+	 * due to some missing interrupt remapping plumbing. This is probably
+	 * acceptable because the guest is usually CPU-limited and MSI
+	 * remapping doesn't become a performance bottleneck.
 	 */
-	irq_domain_update_bus_token(vmd->irq_domain, DOMAIN_BUS_VMD_MSI);
+	if (!(features & VMD_FEAT_CAN_BYPASS_MSI_REMAP) ||
+	    offset[0] || offset[1]) {
+		ret = vmd_alloc_irqs(vmd);
+		if (ret)
+			return ret;
+
+		vmd_set_msi_remapping(vmd, true);
+
+		ret = vmd_create_irq_domain(vmd);
+		if (ret)
+			return ret;
+
+		/*
+		 * Override the IRQ domain bus token so the domain can be
+		 * distinguished from a regular PCI/MSI domain.
+		 */
+		irq_domain_update_bus_token(vmd->irq_domain, DOMAIN_BUS_VMD_MSI);
+	} else {
+		vmd_set_msi_remapping(vmd, false);
+	}
 
 	pci_add_resource(&resources, &vmd->resources[0]);
 	pci_add_resource_offset(&resources, &vmd->resources[1], offset[0]);
@@ -753,10 +795,6 @@ static int vmd_probe(struct pci_dev *dev, const struct pci_device_id *id)
 	if (features & VMD_FEAT_OFFSET_FIRST_VECTOR)
 		vmd->first_vec = 1;
 
-	err = vmd_alloc_irqs(vmd);
-	if (err)
-		return err;
-
 	spin_lock_init(&vmd->cfg_lock);
 	pci_set_drvdata(dev, vmd);
 	err = vmd_enable_domain(vmd, features);
@@ -825,7 +863,8 @@ static const struct pci_device_id vmd_ids[] = {
 		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP,},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VMD_28C0),
 		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW |
-				VMD_FEAT_HAS_BUS_RESTRICTIONS,},
+				VMD_FEAT_HAS_BUS_RESTRICTIONS |
+				VMD_FEAT_CAN_BYPASS_MSI_REMAP,},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x467f),
 		.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
 				VMD_FEAT_HAS_BUS_RESTRICTIONS |
-- 
cgit v1.2.3


From 1e83130f01b04c16579ed5a5e03d729bcffc4c5d Mon Sep 17 00:00:00 2001
From: Pali Rohár <pali@kernel.org>
Date: Wed, 3 Mar 2021 15:22:02 +0100
Subject: PCI: iproc: Fix return value of iproc_msi_irq_domain_alloc()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

IRQ domain alloc function should return zero on success. Non-zero value
indicates failure.

Link: https://lore.kernel.org/r/20210303142202.25780-1-pali@kernel.org
Fixes: fc54bae28818 ("PCI: iproc: Allow allocation of multiple MSIs")
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
Acked-by: Ray Jui <ray.jui@broadcom.com>
Acked-by: Marc Zyngier <maz@kernel.org>
---
 drivers/pci/controller/pcie-iproc-msi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pcie-iproc-msi.c b/drivers/pci/controller/pcie-iproc-msi.c
index 908475d27e0e..eede4e8f3f75 100644
--- a/drivers/pci/controller/pcie-iproc-msi.c
+++ b/drivers/pci/controller/pcie-iproc-msi.c
@@ -271,7 +271,7 @@ static int iproc_msi_irq_domain_alloc(struct irq_domain *domain,
 				    NULL, NULL);
 	}
 
-	return hwirq;
+	return 0;
 }
 
 static void iproc_msi_irq_domain_free(struct irq_domain *domain,
-- 
cgit v1.2.3


From 2c61f32124b0c8868ac8579bb626ea579f2e08bb Mon Sep 17 00:00:00 2001
From: Wei Yongjun <weiyongjun1@huawei.com>
Date: Mon, 8 Mar 2021 09:48:42 +0000
Subject: PCI: microchip: Make some symbols static
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The sparse tool complains as follows:

drivers/pci/controller/pcie-microchip-host.c:304:18: warning:
 symbol 'pcie_event_to_event' was not declared. Should it be static?
drivers/pci/controller/pcie-microchip-host.c:310:18: warning:
 symbol 'sec_error_to_event' was not declared. Should it be static?
drivers/pci/controller/pcie-microchip-host.c:317:18: warning:
 symbol 'ded_error_to_event' was not declared. Should it be static?
drivers/pci/controller/pcie-microchip-host.c:324:18: warning:
 symbol 'local_status_to_event' was not declared. Should it be static?

Those symbols are not used outside of pcie-microchip-host.c, so this
commit marks them static.

Link: https://lore.kernel.org/r/20210308094842.3588847-1-weiyongjun1@huawei.com
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
---
 drivers/pci/controller/pcie-microchip-host.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pcie-microchip-host.c b/drivers/pci/controller/pcie-microchip-host.c
index 04c19ff81aff..132631cfe4b6 100644
--- a/drivers/pci/controller/pcie-microchip-host.c
+++ b/drivers/pci/controller/pcie-microchip-host.c
@@ -301,27 +301,27 @@ static const struct cause event_cause[NUM_EVENTS] = {
 	LOCAL_EVENT_CAUSE(PM_MSI_INT_SYS_ERR, "system error"),
 };
 
-struct event_map pcie_event_to_event[] = {
+static struct event_map pcie_event_to_event[] = {
 	PCIE_EVENT_TO_EVENT_MAP(L2_EXIT),
 	PCIE_EVENT_TO_EVENT_MAP(HOTRST_EXIT),
 	PCIE_EVENT_TO_EVENT_MAP(DLUP_EXIT),
 };
 
-struct event_map sec_error_to_event[] = {
+static struct event_map sec_error_to_event[] = {
 	SEC_ERROR_TO_EVENT_MAP(TX_RAM_SEC_ERR),
 	SEC_ERROR_TO_EVENT_MAP(RX_RAM_SEC_ERR),
 	SEC_ERROR_TO_EVENT_MAP(PCIE2AXI_RAM_SEC_ERR),
 	SEC_ERROR_TO_EVENT_MAP(AXI2PCIE_RAM_SEC_ERR),
 };
 
-struct event_map ded_error_to_event[] = {
+static struct event_map ded_error_to_event[] = {
 	DED_ERROR_TO_EVENT_MAP(TX_RAM_DED_ERR),
 	DED_ERROR_TO_EVENT_MAP(RX_RAM_DED_ERR),
 	DED_ERROR_TO_EVENT_MAP(PCIE2AXI_RAM_DED_ERR),
 	DED_ERROR_TO_EVENT_MAP(AXI2PCIE_RAM_DED_ERR),
 };
 
-struct event_map local_status_to_event[] = {
+static struct event_map local_status_to_event[] = {
 	LOCAL_STATUS_TO_EVENT_MAP(DMA_END_ENGINE_0),
 	LOCAL_STATUS_TO_EVENT_MAP(DMA_END_ENGINE_1),
 	LOCAL_STATUS_TO_EVENT_MAP(DMA_ERROR_ENGINE_0),
-- 
cgit v1.2.3


From 6e7628c8c3c1af74ea31e8da85b641a50fe3a86c Mon Sep 17 00:00:00 2001
From: Krzysztof Wilczyński <kw@linux.com>
Date: Wed, 10 Mar 2021 13:19:13 +0000
Subject: PCI: microchip: Remove dev_err() when handing an error from
 platform_get_irq()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

There is no need to call the dev_err() function directly to print a
custom message when handling an error from either the platform_get_irq()
or platform_get_irq_byname() functions as both are going to display an
appropriate error message in case of a failure.

This change is as per suggestions from Coccinelle, e.g.,
  drivers/pci/controller/pcie-microchip-host.c:1027:2-9: line 1027 is
  redundant because platform_get_irq() already prints an error

Related commit caecb05c8000 ("PCI: Remove dev_err() when handing an
error from platform_get_irq()").

Link: https://lore.kernel.org/r/20210310131913.2802385-1-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
---
 drivers/pci/controller/pcie-microchip-host.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pcie-microchip-host.c b/drivers/pci/controller/pcie-microchip-host.c
index 132631cfe4b6..89c68c56d93b 100644
--- a/drivers/pci/controller/pcie-microchip-host.c
+++ b/drivers/pci/controller/pcie-microchip-host.c
@@ -1023,10 +1023,8 @@ static int mc_platform_init(struct pci_config_window *cfg)
 	}
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(dev, "unable to request IRQ%d\n", irq);
+	if (irq < 0)
 		return -ENODEV;
-	}
 
 	for (i = 0; i < NUM_EVENTS; i++) {
 		event_irq = irq_create_mapping(port->event_domain, i);
-- 
cgit v1.2.3


From 3d0b2a3a87ce5ae85de46c4241afd52ab8b566fe Mon Sep 17 00:00:00 2001
From: Kishon Vijay Abraham I <kishon@ti.com>
Date: Wed, 17 Mar 2021 18:45:18 +0530
Subject: PCI: keystone: Let AM65 use the pci_ops defined in
 pcie-designware-host.c
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Both TI's AM65x (K3) and TI's K2 PCIe driver are implemented in
pci-keystone. However Only K2 PCIe driver should use it's own pci_ops
for configuration space accesses. But commit 10a797c6e54a
("PCI: dwc: keystone: Use pci_ops for config space accessors") used
custom pci_ops for both AM65x and K2. This breaks configuration space
access for AM65x platform. Fix it here.

Link: https://lore.kernel.org/r/20210317131518.11040-1-kishon@ti.com
Fixes: 10a797c6e54a ("PCI: dwc: keystone: Use pci_ops for config space accessors")
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
Cc: <stable@vger.kernel.org> # v5.10
---
 drivers/pci/controller/dwc/pci-keystone.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 53aa35cb3a49..a59ecbec601f 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -798,7 +798,8 @@ static int __init ks_pcie_host_init(struct pcie_port *pp)
 	int ret;
 
 	pp->bridge->ops = &ks_pcie_ops;
-	pp->bridge->child_ops = &ks_child_pcie_ops;
+	if (!ks_pcie->is_am6)
+		pp->bridge->child_ops = &ks_child_pcie_ops;
 
 	ret = ks_pcie_config_legacy_irq(ks_pcie);
 	if (ret)
-- 
cgit v1.2.3


From 1b7996a528b3f81bb8dac6d29a957db1d33546d3 Mon Sep 17 00:00:00 2001
From: Krzysztof Wilczyński <kw@linux.com>
Date: Thu, 11 Mar 2021 03:37:45 +0000
Subject: PCI: layerscape: Correct syntax by changing comma to semicolon
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Replace command with a semicolon to correct syntax and to prevent
potential unspecified behaviour and/or unintended side effects.

Related:
  https://lore.kernel.org/linux-pci/20201216131944.14990-1-zhengyongjun3@huawei.com/

Co-authored-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Link: https://lore.kernel.org/r/20210311033745.1547044-1-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Roy Zang <roy.zang@nxp.com>
---
 drivers/pci/controller/dwc/pci-layerscape-ep.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/dwc/pci-layerscape-ep.c b/drivers/pci/controller/dwc/pci-layerscape-ep.c
index 39fe2ed5a6a2..39f4664bd84c 100644
--- a/drivers/pci/controller/dwc/pci-layerscape-ep.c
+++ b/drivers/pci/controller/dwc/pci-layerscape-ep.c
@@ -154,7 +154,7 @@ static int __init ls_pcie_ep_probe(struct platform_device *pdev)
 	pci->dev = dev;
 	pci->ops = pcie->drvdata->dw_pcie_ops;
 
-	ls_epc->bar_fixed_64bit = (1 << BAR_2) | (1 << BAR_4),
+	ls_epc->bar_fixed_64bit = (1 << BAR_2) | (1 << BAR_4);
 
 	pcie->pci = pci;
 	pcie->ls_epc = ls_epc;
-- 
cgit v1.2.3


From b5d9209d50838474fc1b2901d0e11bba59906428 Mon Sep 17 00:00:00 2001
From: Wei Yongjun <weiyongjun1@huawei.com>
Date: Mon, 8 Mar 2021 13:56:19 +0000
Subject: PCI: brcmstb: Fix error return code in brcm_pcie_probe()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fix to return negative error code -ENODEV from the unsupported revision
error handling case instead of 0, as done elsewhere in this function.

Link: https://lore.kernel.org/r/20210308135619.19133-1-weiyongjun1@huawei.com
Fixes: 0cdfaceb9889 ("PCI: brcmstb: support BCM4908 with external PERST# signal controller")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/pci/controller/pcie-brcmstb.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index e330e6811f0b..69c999222cc8 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -1296,6 +1296,7 @@ static int brcm_pcie_probe(struct platform_device *pdev)
 	pcie->hw_rev = readl(pcie->base + PCIE_MISC_REVISION);
 	if (pcie->type == BCM4908 && pcie->hw_rev >= BRCM_PCIE_HW_REV_3_20) {
 		dev_err(pcie->dev, "hardware revision with unsupported PERST# setup\n");
+		ret = -ENODEV;
 		goto fail;
 	}
 
-- 
cgit v1.2.3


From 10739e2a5e83ecac6a7d2422369c5fe8a1a72b04 Mon Sep 17 00:00:00 2001
From: Wesley Sheng <wesley.sheng@amd.com>
Date: Thu, 31 Dec 2020 11:25:39 +0800
Subject: PCI: tegra: Fix typo for PCIe endpoint mode in Tegra194
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

In config PCIE_TEGRA194_EP the mode incorrectly is referred to as
host mode. Fix it.

Link: https://lore.kernel.org/r/20201231032539.22322-1-wesley.sheng@amd.com
Signed-off-by: Wesley Sheng <wesley.sheng@amd.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
Acked-by: Vidya Sagar <vidyas@nvidia.com>
---
 drivers/pci/controller/dwc/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
index 22c5529e9a65..c26572e1a7ef 100644
--- a/drivers/pci/controller/dwc/Kconfig
+++ b/drivers/pci/controller/dwc/Kconfig
@@ -280,7 +280,7 @@ config PCIE_TEGRA194_EP
 	select PCIE_TEGRA194
 	help
 	  Enables support for the PCIe controller in the NVIDIA Tegra194 SoC to
-	  work in host mode. There are two instances of PCIe controllers in
+	  work in endpoint mode. There are two instances of PCIe controllers in
 	  Tegra194. This controller can work either as EP or RC. In order to
 	  enable host-specific features PCIE_TEGRA194_HOST must be selected and
 	  in order to enable device-specific features PCIE_TEGRA194_EP must be
-- 
cgit v1.2.3


From 021a90fe60ea08262ad01f9c9d0514d63462b4a7 Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Mon, 8 Feb 2021 15:23:01 +0100
Subject: PCI: mobiveil: Improve PCIE_LAYERSCAPE_GEN4 dependencies

  - Drop the dependency on PCI, as this is implied by the dependency on
    PCI_MSI_IRQ_DOMAIN,
  - Drop the dependencies on OF and ARM64, as the driver compiles fine
    without OF and/or on other architectures,
  - The Freescale Layerscape PCIe Gen4 controller is present only on
    Freescale Layerscape SoCs.  Hence depend on ARCH_LAYERSCAPE, to
    prevent asking the user about this driver when configuring a kernel
    without Freescale Layerscape support, unless compile-testing.

Link: https://lore.kernel.org/r/20210208142301.413582-1-geert+renesas@glider.be
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
---
 drivers/pci/controller/mobiveil/Kconfig | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/mobiveil/Kconfig b/drivers/pci/controller/mobiveil/Kconfig
index a62d247018cf..e4643fb94e78 100644
--- a/drivers/pci/controller/mobiveil/Kconfig
+++ b/drivers/pci/controller/mobiveil/Kconfig
@@ -24,8 +24,7 @@ config PCIE_MOBIVEIL_PLAT
 
 config PCIE_LAYERSCAPE_GEN4
 	bool "Freescale Layerscape PCIe Gen4 controller"
-	depends on PCI
-	depends on OF && (ARM64 || ARCH_LAYERSCAPE)
+	depends on ARCH_LAYERSCAPE || COMPILE_TEST
 	depends on PCI_MSI_IRQ_DOMAIN
 	select PCIE_MOBIVEIL_HOST
 	help
-- 
cgit v1.2.3


From 49e0efdce791256fef94c3940aea77a0a6b0622e Mon Sep 17 00:00:00 2001
From: Kishon Vijay Abraham I <kishon@ti.com>
Date: Mon, 8 Mar 2021 12:05:50 +0530
Subject: PCI: j721e: Add support to provide refclk to PCIe connector

Add support to provide refclk to PCIe connector.

Link: https://lore.kernel.org/r/20210308063550.6227-5-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
---
 drivers/pci/controller/cadence/pci-j721e.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c
index 849f1e416ea5..9c102efc306a 100644
--- a/drivers/pci/controller/cadence/pci-j721e.c
+++ b/drivers/pci/controller/cadence/pci-j721e.c
@@ -6,6 +6,7 @@
  * Author: Kishon Vijay Abraham I <kishon@ti.com>
  */
 
+#include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/io.h>
@@ -50,6 +51,7 @@ enum link_status {
 
 struct j721e_pcie {
 	struct device		*dev;
+	struct clk		*refclk;
 	u32			mode;
 	u32			num_lanes;
 	struct cdns_pcie	*cdns_pcie;
@@ -312,6 +314,7 @@ static int j721e_pcie_probe(struct platform_device *pdev)
 	struct cdns_pcie_ep *ep;
 	struct gpio_desc *gpiod;
 	void __iomem *base;
+	struct clk *clk;
 	u32 num_lanes;
 	u32 mode;
 	int ret;
@@ -411,6 +414,20 @@ static int j721e_pcie_probe(struct platform_device *pdev)
 			goto err_get_sync;
 		}
 
+		clk = devm_clk_get_optional(dev, "pcie_refclk");
+		if (IS_ERR(clk)) {
+			ret = PTR_ERR(clk);
+			dev_err(dev, "failed to get pcie_refclk\n");
+			goto err_pcie_setup;
+		}
+
+		ret = clk_prepare_enable(clk);
+		if (ret) {
+			dev_err(dev, "failed to enable pcie_refclk\n");
+			goto err_get_sync;
+		}
+		pcie->refclk = clk;
+
 		/*
 		 * "Power Sequencing and Reset Signal Timings" table in
 		 * PCI EXPRESS CARD ELECTROMECHANICAL SPECIFICATION, REV. 3.0
@@ -425,8 +442,10 @@ static int j721e_pcie_probe(struct platform_device *pdev)
 		}
 
 		ret = cdns_pcie_host_setup(rc);
-		if (ret < 0)
+		if (ret < 0) {
+			clk_disable_unprepare(pcie->refclk);
 			goto err_pcie_setup;
+		}
 
 		break;
 	case PCI_MODE_EP:
@@ -479,6 +498,7 @@ static int j721e_pcie_remove(struct platform_device *pdev)
 	struct cdns_pcie *cdns_pcie = pcie->cdns_pcie;
 	struct device *dev = &pdev->dev;
 
+	clk_disable_unprepare(pcie->refclk);
 	cdns_pcie_disable_phy(cdns_pcie);
 	pm_runtime_put(dev);
 	pm_runtime_disable(dev);
-- 
cgit v1.2.3


From c99e755a4a4c165cad6effb39faffd0f3377c02d Mon Sep 17 00:00:00 2001
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Date: Mon, 25 Jan 2021 02:28:26 +0300
Subject: PCI: Release OF node in pci_scan_device()'s error path

In pci_scan_device(), if pci_setup_device() fails for any reason, the code
will not release device's of_node by calling pci_release_of_node().  Fix
that by calling the release function.

Fixes: 98d9f30c820d ("pci/of: Match PCI devices to OF nodes dynamically")
Link: https://lore.kernel.org/r/20210124232826.1879-1-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
---
 drivers/pci/probe.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 953f15abc850..be51670572fa 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2353,6 +2353,7 @@ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn)
 	pci_set_of_node(dev);
 
 	if (pci_setup_device(dev)) {
+		pci_release_of_node(dev);
 		pci_bus_put(dev->bus);
 		kfree(dev);
 		return NULL;
-- 
cgit v1.2.3


From 8d69f62fddf6c1a8c7745120c4d6aab9322b001a Mon Sep 17 00:00:00 2001
From: Johannes Hahn <johannes-hahn@siemens.com>
Date: Wed, 17 Mar 2021 08:52:27 +0100
Subject: rtc: rx6110: add ACPI bindings to I2C

This allows the RX6110 driver to be automatically assigned to the right
device on the I2C bus.

Signed-off-by: Johannes Hahn <johannes-hahn@siemens.com>
Co-developed-by: Claudius Heine <ch@denx.de>
Signed-off-by: Claudius Heine <ch@denx.de>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210317075228.683184-1-ch@denx.de
---
 drivers/rtc/rtc-rx6110.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-rx6110.c b/drivers/rtc/rtc-rx6110.c
index 79161d4c6ce4..f4d425002f7f 100644
--- a/drivers/rtc/rtc-rx6110.c
+++ b/drivers/rtc/rtc-rx6110.c
@@ -447,6 +447,12 @@ static int rx6110_i2c_probe(struct i2c_client *client,
 	return rx6110_probe(rx6110, &client->dev);
 }
 
+static const struct acpi_device_id rx6110_i2c_acpi_match[] = {
+	{ "SECC6110" },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, rx6110_i2c_acpi_match);
+
 static const struct i2c_device_id rx6110_i2c_id[] = {
 	{ "rx6110", 0 },
 	{ }
@@ -456,6 +462,7 @@ MODULE_DEVICE_TABLE(i2c, rx6110_i2c_id);
 static struct i2c_driver rx6110_i2c_driver = {
 	.driver = {
 		.name = RX6110_DRIVER_NAME,
+		.acpi_match_table = rx6110_i2c_acpi_match,
 	},
 	.probe		= rx6110_i2c_probe,
 	.id_table	= rx6110_i2c_id,
-- 
cgit v1.2.3


From a7ed7150f351177e46409cca15874101f95370cb Mon Sep 17 00:00:00 2001
From: Rahul Tanwar <rtanwar@maxlinear.com>
Date: Thu, 25 Mar 2021 11:35:10 +0100
Subject: leds: lgm: Improve Kconfig help

Remove unnecessary Kconfig symbol LEDS_BLINK
Improve Kconfig help text to make it more useful.

Signed-off-by: Rahul Tanwar <rtanwar@maxlinear.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
---
 drivers/leds/Kconfig        |  5 ++---
 drivers/leds/Makefile       |  2 +-
 drivers/leds/blink/Kconfig  | 36 +++++++++++++++++-------------------
 drivers/leds/blink/Makefile |  2 +-
 4 files changed, 21 insertions(+), 24 deletions(-)

(limited to 'drivers')

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index b6742b4231bf..4ca8cd594518 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -928,13 +928,12 @@ config LEDS_ACER_A500
 	  This option enables support for the Power Button LED of
 	  Acer Iconia Tab A500.
 
+source "drivers/leds/blink/Kconfig"
+
 comment "Flash and Torch LED drivers"
 source "drivers/leds/flash/Kconfig"
 
 comment "LED Triggers"
 source "drivers/leds/trigger/Kconfig"
 
-comment "LED Blink"
-source "drivers/leds/blink/Kconfig"
-
 endif # NEW_LEDS
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 2a698df9da57..7e604d3028c8 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -110,4 +110,4 @@ obj-$(CONFIG_LEDS_CLASS_FLASH)		+= flash/
 obj-$(CONFIG_LEDS_TRIGGERS)		+= trigger/
 
 # LED Blink
-obj-$(CONFIG_LEDS_BLINK)                += blink/
+obj-y					+= blink/
diff --git a/drivers/leds/blink/Kconfig b/drivers/leds/blink/Kconfig
index 6dedc58c47b3..964c5037d9a5 100644
--- a/drivers/leds/blink/Kconfig
+++ b/drivers/leds/blink/Kconfig
@@ -1,21 +1,19 @@
-menuconfig LEDS_BLINK
-	bool "LED Blink support"
-	depends on LEDS_CLASS
-	help
-	  This option enables blink support for the leds class.
-	  If unsure, say Y.
+config LEDS_LGM
+       tristate "LED support for LGM SoC series"
+       depends on GPIOLIB
+       depends on LEDS_CLASS
+       depends on MFD_SYSCON
+       depends on OF
+       help
+         This option enables support for LEDs connected to GPIO lines on
+         Lightning Mountain (LGM) SoC. Lightning Mountain is a AnyWAN
+         gateway-on-a-chip SoC to be shipped on mid and high end home
+         gateways and routers.
 
-if LEDS_BLINK
+         These LEDs are driven by a Serial Shift Output (SSO) controller.
+         The driver supports hardware blinking and the LEDs can be configured
+         to be triggered by software/CPU or by hardware.
 
-config LEDS_BLINK_LGM
-	tristate "LED support for Intel LGM SoC series"
-	depends on GPIOLIB
-	depends on LEDS_CLASS
-	depends on MFD_SYSCON
-	depends on OF
-	help
-	  Parallel to serial conversion, which is also called SSO controller,
-	  can drive external shift register for LED outputs.
-	  This enables LED support for Serial Shift Output controller(SSO).
-
-endif # LEDS_BLINK
+         Say 'Y' here if you are working on LGM SoC based platform. Otherwise,
+         say 'N'. To compile this driver as a module, choose M here: the module
+         will be called leds-lgm-sso.
diff --git a/drivers/leds/blink/Makefile b/drivers/leds/blink/Makefile
index 2fa6c7b7b67e..fa5d04dccf13 100644
--- a/drivers/leds/blink/Makefile
+++ b/drivers/leds/blink/Makefile
@@ -1,2 +1,2 @@
 # SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_LEDS_BLINK_LGM)	+= leds-lgm-sso.o
+obj-$(CONFIG_LEDS_LGM)	+= leds-lgm-sso.o
-- 
cgit v1.2.3


From 8f50743feedd9a4d322322ef1d91426401e98e10 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <uwe@kleine-koenig.org>
Date: Sun, 21 Mar 2021 15:24:12 -0700
Subject: Input: max8997 - simplify open coding of a division using up to 64
 divisions
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The for loop is just a complicate way to express a division. Replace it
by the actual division which is both simpler to understand for a human
and more efficient for a CPU to calculate.

Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Link: https://lore.kernel.org/r/20210316212233.50765-1-uwe@kleine-koenig.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/misc/max8997_haptic.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/misc/max8997_haptic.c b/drivers/input/misc/max8997_haptic.c
index 20ff087b8a44..cd5e99ec1d3c 100644
--- a/drivers/input/misc/max8997_haptic.c
+++ b/drivers/input/misc/max8997_haptic.c
@@ -61,15 +61,10 @@ static int max8997_haptic_set_duty_cycle(struct max8997_haptic *chip)
 		unsigned int duty = chip->pwm_period * chip->level / 100;
 		ret = pwm_config(chip->pwm, duty, chip->pwm_period);
 	} else {
-		int i;
 		u8 duty_index = 0;
 
-		for (i = 0; i <= 64; i++) {
-			if (chip->level <= i * 100 / 64) {
-				duty_index = i;
-				break;
-			}
-		}
+		duty_index = DIV_ROUND_UP(chip->level * 64, 100);
+
 		switch (chip->internal_mode_pattern) {
 		case 0:
 			max8997_write_reg(chip->client,
-- 
cgit v1.2.3


From 36a8fc6fa230eb936385884391cac80420cd0e6f Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul@crapouillou.net>
Date: Sun, 21 Mar 2021 16:06:23 -0700
Subject: Input: gpio-keys - remove extra call to input_sync

The input_sync() function is already called after the loop in
gpio_keys_report_state(), so it does not need to be called after each
iteration within gpio_keys_gpio_report_event().

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20210307222240.380583-1-paul@crapouillou.net
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/keyboard/gpio_keys.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index 77bac4ddf324..7fcb2c35c5cc 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -373,7 +373,6 @@ static void gpio_keys_gpio_report_event(struct gpio_button_data *bdata)
 	} else {
 		input_event(input, type, *bdata->code, state);
 	}
-	input_sync(input);
 }
 
 static void gpio_keys_gpio_work_func(struct work_struct *work)
@@ -382,6 +381,7 @@ static void gpio_keys_gpio_work_func(struct work_struct *work)
 		container_of(work, struct gpio_button_data, work.work);
 
 	gpio_keys_gpio_report_event(bdata);
+	input_sync(bdata->input);
 
 	if (bdata->button->wakeup)
 		pm_relax(bdata->input->dev.parent);
-- 
cgit v1.2.3


From 019002f20cb5b9f78d39360aff244265d035e08a Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul@crapouillou.net>
Date: Sun, 21 Mar 2021 16:06:34 -0700
Subject: Input: gpio-keys - use hrtimer for release timer

Dealing with input, timing is important; if the button should be
released in one millisecond, then it should be done in one millisecond
and not a hundred milliseconds.

Therefore, the standard timer API is not really suitable for this task.

Convert the gpio-keys driver to use a hrtimer instead of the standard
timer to address this issue.

Note that by using a hard IRQ for the hrtimer callback, we can get rid
of the spin_lock_irqsave() and spin_unlock_irqrestore().

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20210307222240.380583-2-paul@crapouillou.net
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/keyboard/gpio_keys.c | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index 7fcb2c35c5cc..4b92f49decef 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -8,6 +8,7 @@
 
 #include <linux/module.h>
 
+#include <linux/hrtimer.h>
 #include <linux/init.h>
 #include <linux/fs.h>
 #include <linux/interrupt.h>
@@ -36,7 +37,7 @@ struct gpio_button_data {
 
 	unsigned short *code;
 
-	struct timer_list release_timer;
+	struct hrtimer release_timer;
 	unsigned int release_delay;	/* in msecs, for IRQ-only buttons */
 
 	struct delayed_work work;
@@ -146,7 +147,7 @@ static void gpio_keys_disable_button(struct gpio_button_data *bdata)
 		if (bdata->gpiod)
 			cancel_delayed_work_sync(&bdata->work);
 		else
-			del_timer_sync(&bdata->release_timer);
+			hrtimer_cancel(&bdata->release_timer);
 
 		bdata->disabled = true;
 	}
@@ -415,19 +416,20 @@ static irqreturn_t gpio_keys_gpio_isr(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static void gpio_keys_irq_timer(struct timer_list *t)
+static enum hrtimer_restart gpio_keys_irq_timer(struct hrtimer *t)
 {
-	struct gpio_button_data *bdata = from_timer(bdata, t, release_timer);
+	struct gpio_button_data *bdata = container_of(t,
+						      struct gpio_button_data,
+						      release_timer);
 	struct input_dev *input = bdata->input;
-	unsigned long flags;
 
-	spin_lock_irqsave(&bdata->lock, flags);
 	if (bdata->key_pressed) {
 		input_event(input, EV_KEY, *bdata->code, 0);
 		input_sync(input);
 		bdata->key_pressed = false;
 	}
-	spin_unlock_irqrestore(&bdata->lock, flags);
+
+	return HRTIMER_NORESTART;
 }
 
 static irqreturn_t gpio_keys_irq_isr(int irq, void *dev_id)
@@ -457,8 +459,9 @@ static irqreturn_t gpio_keys_irq_isr(int irq, void *dev_id)
 	}
 
 	if (bdata->release_delay)
-		mod_timer(&bdata->release_timer,
-			jiffies + msecs_to_jiffies(bdata->release_delay));
+		hrtimer_start(&bdata->release_timer,
+			      ms_to_ktime(bdata->release_delay),
+			      HRTIMER_MODE_REL_HARD);
 out:
 	spin_unlock_irqrestore(&bdata->lock, flags);
 	return IRQ_HANDLED;
@@ -471,7 +474,7 @@ static void gpio_keys_quiesce_key(void *data)
 	if (bdata->gpiod)
 		cancel_delayed_work_sync(&bdata->work);
 	else
-		del_timer_sync(&bdata->release_timer);
+		hrtimer_cancel(&bdata->release_timer);
 }
 
 static int gpio_keys_setup_key(struct platform_device *pdev,
@@ -595,7 +598,9 @@ static int gpio_keys_setup_key(struct platform_device *pdev,
 		}
 
 		bdata->release_delay = button->debounce_interval;
-		timer_setup(&bdata->release_timer, gpio_keys_irq_timer, 0);
+		hrtimer_init(&bdata->release_timer,
+			     CLOCK_REALTIME, HRTIMER_MODE_REL_HARD);
+		bdata->release_timer.function = gpio_keys_irq_timer;
 
 		isr = gpio_keys_irq_isr;
 		irqflags = 0;
-- 
cgit v1.2.3


From c9efb0ba281e88e2faec6ad919be509b6ab8ead6 Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul@crapouillou.net>
Date: Sun, 21 Mar 2021 16:09:29 -0700
Subject: Input: gpio-keys - use hrtimer for software debounce, if possible

We want to be able to report the input event as soon as the debounce
delay elapsed. However, the current code does not really ensure that,
as it uses the jiffies-based schedule_delayed_work() API. With a small
enough HZ value (HZ <= 100), this results in some input events being
lost, when a key is quickly pressed then released (on a human's time
scale).

Switching to hrtimers fixes this issue, and will work even on extremely
low HZ values (tested at HZ=24). This is however only possible if
reading the GPIO is possible without sleeping. If this condition is not
met, the previous approach of using a jiffies-based timer is taken.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20210307222240.380583-3-paul@crapouillou.net
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/keyboard/gpio_keys.c | 66 ++++++++++++++++++++++++++++++--------
 1 file changed, 52 insertions(+), 14 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index 4b92f49decef..fe8fc76ee22e 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -41,6 +41,7 @@ struct gpio_button_data {
 	unsigned int release_delay;	/* in msecs, for IRQ-only buttons */
 
 	struct delayed_work work;
+	struct hrtimer debounce_timer;
 	unsigned int software_debounce;	/* in msecs, for GPIO-driven buttons */
 
 	unsigned int irq;
@@ -49,6 +50,7 @@ struct gpio_button_data {
 	bool disabled;
 	bool key_pressed;
 	bool suspended;
+	bool debounce_use_hrtimer;
 };
 
 struct gpio_keys_drvdata {
@@ -144,10 +146,10 @@ static void gpio_keys_disable_button(struct gpio_button_data *bdata)
 		 */
 		disable_irq(bdata->irq);
 
-		if (bdata->gpiod)
-			cancel_delayed_work_sync(&bdata->work);
-		else
+		if (bdata->debounce_use_hrtimer)
 			hrtimer_cancel(&bdata->release_timer);
+		else
+			cancel_delayed_work_sync(&bdata->work);
 
 		bdata->disabled = true;
 	}
@@ -361,7 +363,9 @@ static void gpio_keys_gpio_report_event(struct gpio_button_data *bdata)
 	unsigned int type = button->type ?: EV_KEY;
 	int state;
 
-	state = gpiod_get_value_cansleep(bdata->gpiod);
+	state = bdata->debounce_use_hrtimer ?
+			gpiod_get_value(bdata->gpiod) :
+			gpiod_get_value_cansleep(bdata->gpiod);
 	if (state < 0) {
 		dev_err(input->dev.parent,
 			"failed to get gpio state: %d\n", state);
@@ -376,11 +380,8 @@ static void gpio_keys_gpio_report_event(struct gpio_button_data *bdata)
 	}
 }
 
-static void gpio_keys_gpio_work_func(struct work_struct *work)
+static void gpio_keys_debounce_event(struct gpio_button_data *bdata)
 {
-	struct gpio_button_data *bdata =
-		container_of(work, struct gpio_button_data, work.work);
-
 	gpio_keys_gpio_report_event(bdata);
 	input_sync(bdata->input);
 
@@ -388,6 +389,24 @@ static void gpio_keys_gpio_work_func(struct work_struct *work)
 		pm_relax(bdata->input->dev.parent);
 }
 
+static void gpio_keys_gpio_work_func(struct work_struct *work)
+{
+	struct gpio_button_data *bdata =
+		container_of(work, struct gpio_button_data, work.work);
+
+	gpio_keys_debounce_event(bdata);
+}
+
+static enum hrtimer_restart gpio_keys_debounce_timer(struct hrtimer *t)
+{
+	struct gpio_button_data *bdata =
+		container_of(t, struct gpio_button_data, debounce_timer);
+
+	gpio_keys_debounce_event(bdata);
+
+	return HRTIMER_NORESTART;
+}
+
 static irqreturn_t gpio_keys_gpio_isr(int irq, void *dev_id)
 {
 	struct gpio_button_data *bdata = dev_id;
@@ -409,9 +428,15 @@ static irqreturn_t gpio_keys_gpio_isr(int irq, void *dev_id)
 		}
 	}
 
-	mod_delayed_work(system_wq,
-			 &bdata->work,
-			 msecs_to_jiffies(bdata->software_debounce));
+	if (bdata->debounce_use_hrtimer) {
+		hrtimer_start(&bdata->debounce_timer,
+			      ms_to_ktime(bdata->software_debounce),
+			      HRTIMER_MODE_REL);
+	} else {
+		mod_delayed_work(system_wq,
+				 &bdata->work,
+				 msecs_to_jiffies(bdata->software_debounce));
+	}
 
 	return IRQ_HANDLED;
 }
@@ -471,10 +496,10 @@ static void gpio_keys_quiesce_key(void *data)
 {
 	struct gpio_button_data *bdata = data;
 
-	if (bdata->gpiod)
-		cancel_delayed_work_sync(&bdata->work);
+	if (bdata->debounce_use_hrtimer)
+		hrtimer_cancel(&bdata->debounce_timer);
 	else
-		hrtimer_cancel(&bdata->release_timer);
+		cancel_delayed_work_sync(&bdata->work);
 }
 
 static int gpio_keys_setup_key(struct platform_device *pdev,
@@ -546,6 +571,14 @@ static int gpio_keys_setup_key(struct platform_device *pdev,
 			if (error < 0)
 				bdata->software_debounce =
 						button->debounce_interval;
+
+			/*
+			 * If reading the GPIO won't sleep, we can use a
+			 * hrtimer instead of a standard timer for the software
+			 * debounce, to reduce the latency as much as possible.
+			 */
+			bdata->debounce_use_hrtimer =
+					!gpiod_cansleep(bdata->gpiod);
 		}
 
 		if (button->irq) {
@@ -564,6 +597,10 @@ static int gpio_keys_setup_key(struct platform_device *pdev,
 
 		INIT_DELAYED_WORK(&bdata->work, gpio_keys_gpio_work_func);
 
+		hrtimer_init(&bdata->debounce_timer,
+			     CLOCK_REALTIME, HRTIMER_MODE_REL);
+		bdata->debounce_timer.function = gpio_keys_debounce_timer;
+
 		isr = gpio_keys_gpio_isr;
 		irqflags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING;
 
@@ -598,6 +635,7 @@ static int gpio_keys_setup_key(struct platform_device *pdev,
 		}
 
 		bdata->release_delay = button->debounce_interval;
+		bdata->debounce_use_hrtimer = true;
 		hrtimer_init(&bdata->release_timer,
 			     CLOCK_REALTIME, HRTIMER_MODE_REL_HARD);
 		bdata->release_timer.function = gpio_keys_irq_timer;
-- 
cgit v1.2.3


From 4c976acb47bd4262ebf469698d26e1b8f4a338b4 Mon Sep 17 00:00:00 2001
From: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Date: Sun, 21 Mar 2021 20:31:36 -0700
Subject: Input: silead - fix a typo

s/subsytem/subsystem/

Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20210322022030.3857089-1-unixbhaskar@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/silead.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/silead.c b/drivers/input/touchscreen/silead.c
index 8fa2f3b7cfd8..32725d7422de 100644
--- a/drivers/input/touchscreen/silead.c
+++ b/drivers/input/touchscreen/silead.c
@@ -486,7 +486,7 @@ static int silead_ts_probe(struct i2c_client *client,
 
 	silead_ts_read_props(client);
 
-	/* We must have the IRQ provided by DT or ACPI subsytem */
+	/* We must have the IRQ provided by DT or ACPI subsystem */
 	if (client->irq <= 0)
 		return -ENODEV;
 
-- 
cgit v1.2.3


From 0cdd2e906cf321e9a736b94d22e6603f6f515ee8 Mon Sep 17 00:00:00 2001
From: Jeff LaBundy <jeff@labundy.com>
Date: Sun, 21 Mar 2021 21:00:24 -0700
Subject: Input: iqs5xx - update vendor's URL

Replace 'http' with 'https' and correct the spelling of the nearby
word 'datasheet'.

Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Link: https://lore.kernel.org/r/20210313191236.4366-2-jeff@labundy.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/iqs5xx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/iqs5xx.c b/drivers/input/touchscreen/iqs5xx.c
index 54f30038dca4..403e251a5e7d 100644
--- a/drivers/input/touchscreen/iqs5xx.c
+++ b/drivers/input/touchscreen/iqs5xx.c
@@ -8,7 +8,7 @@
  * made available by the vendor. Firmware files may be pushed to the device's
  * nonvolatile memory by writing the filename to the 'fw_file' sysfs control.
  *
- * Link to PC-based configuration tool and data sheet: http://www.azoteq.com/
+ * Link to PC-based configuration tool and datasheet: https://www.azoteq.com/
  */
 
 #include <linux/bits.h>
-- 
cgit v1.2.3


From 40c3efdc0b77d3f5298c9ce4fcb029da30f887e5 Mon Sep 17 00:00:00 2001
From: Jeff LaBundy <jeff@labundy.com>
Date: Sun, 21 Mar 2021 21:01:35 -0700
Subject: Input: iqs5xx - optimize axis definition and validation

Set the maximum ABS_MT_PRESSURE value and use the existing U16_MAX
definition instead of a magic number to validate ABS_MT_POSITION_X
and ABS_MT_POSITION_Y.

Also use input_set_abs_params() rather than input_abs_set_max() to
avoid having to call input_set_capability() separately.

Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Link: https://lore.kernel.org/r/20210313191236.4366-3-jeff@labundy.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/iqs5xx.c | 30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/iqs5xx.c b/drivers/input/touchscreen/iqs5xx.c
index 403e251a5e7d..2a4e048f1400 100644
--- a/drivers/input/touchscreen/iqs5xx.c
+++ b/drivers/input/touchscreen/iqs5xx.c
@@ -32,7 +32,6 @@
 #define IQS5XX_NUM_RETRIES	10
 #define IQS5XX_NUM_CONTACTS	5
 #define IQS5XX_WR_BYTES_MAX	2
-#define IQS5XX_XY_RES_MAX	0xFFFE
 
 #define IQS5XX_PROD_NUM_IQS550	40
 #define IQS5XX_PROD_NUM_IQS572	58
@@ -504,10 +503,6 @@ static int iqs5xx_axis_init(struct i2c_client *client)
 		input->open = iqs5xx_open;
 		input->close = iqs5xx_close;
 
-		input_set_capability(input, EV_ABS, ABS_MT_POSITION_X);
-		input_set_capability(input, EV_ABS, ABS_MT_POSITION_Y);
-		input_set_capability(input, EV_ABS, ABS_MT_PRESSURE);
-
 		input_set_drvdata(input, iqs5xx);
 		iqs5xx->input = input;
 	}
@@ -520,26 +515,29 @@ static int iqs5xx_axis_init(struct i2c_client *client)
 	if (error)
 		return error;
 
-	input_abs_set_max(iqs5xx->input, ABS_MT_POSITION_X, max_x);
-	input_abs_set_max(iqs5xx->input, ABS_MT_POSITION_Y, max_y);
+	input_set_abs_params(iqs5xx->input, ABS_MT_POSITION_X, 0, max_x, 0, 0);
+	input_set_abs_params(iqs5xx->input, ABS_MT_POSITION_Y, 0, max_y, 0, 0);
+	input_set_abs_params(iqs5xx->input, ABS_MT_PRESSURE, 0, U16_MAX, 0, 0);
 
 	touchscreen_parse_properties(iqs5xx->input, true, prop);
 
-	if (prop->max_x > IQS5XX_XY_RES_MAX) {
-		dev_err(&client->dev, "Invalid maximum x-coordinate: %u > %u\n",
-			prop->max_x, IQS5XX_XY_RES_MAX);
+	/*
+	 * The device reserves 0xFFFF for coordinates that correspond to slots
+	 * which are not in a state of touch.
+	 */
+	if (prop->max_x >= U16_MAX || prop->max_y >= U16_MAX) {
+		dev_err(&client->dev, "Invalid touchscreen size: %u*%u\n",
+			prop->max_x, prop->max_y);
 		return -EINVAL;
-	} else if (prop->max_x != max_x) {
+	}
+
+	if (prop->max_x != max_x) {
 		error = iqs5xx_write_word(client, IQS5XX_X_RES, prop->max_x);
 		if (error)
 			return error;
 	}
 
-	if (prop->max_y > IQS5XX_XY_RES_MAX) {
-		dev_err(&client->dev, "Invalid maximum y-coordinate: %u > %u\n",
-			prop->max_y, IQS5XX_XY_RES_MAX);
-		return -EINVAL;
-	} else if (prop->max_y != max_y) {
+	if (prop->max_y != max_y) {
 		error = iqs5xx_write_word(client, IQS5XX_Y_RES, prop->max_y);
 		if (error)
 			return error;
-- 
cgit v1.2.3


From 509c0083132bdca505a17140bc98a8365bf4e6ca Mon Sep 17 00:00:00 2001
From: Jeff LaBundy <jeff@labundy.com>
Date: Sun, 21 Mar 2021 21:02:11 -0700
Subject: Input: iqs5xx - expose firmware revision to user space

Add the read-only 'fw_info' attribute which reports information
about the device's firmware in the following format:

a.b.c.d:e.f

Where:

a = Product number (e.g. 40 for IQS550)
b = Project number (e.g. 15)
c = Firmware revision (major)
d = Firmware revision (minor)
e = Customer-assigned exported file version (major)
f = Customer-assigned exported file version (minor)

As part of the corresponding rework to uses of 'bl_status', the
IQS5XX_BL_STATUS_RESET definition is dropped with 0 used in its
place instead.

Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Link: https://lore.kernel.org/r/20210313191236.4366-4-jeff@labundy.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/iqs5xx.c | 56 +++++++++++++++++++++++++++-----------
 1 file changed, 40 insertions(+), 16 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/iqs5xx.c b/drivers/input/touchscreen/iqs5xx.c
index 2a4e048f1400..f36d170e14b2 100644
--- a/drivers/input/touchscreen/iqs5xx.c
+++ b/drivers/input/touchscreen/iqs5xx.c
@@ -63,6 +63,7 @@
 #define IQS5XX_SYS_CFG1		0x058F
 #define IQS5XX_X_RES		0x066E
 #define IQS5XX_Y_RES		0x0670
+#define IQS5XX_EXP_FILE		0x0677
 #define IQS5XX_CHKSM		0x83C0
 #define IQS5XX_APP		0x8400
 #define IQS5XX_CSTM		0xBE00
@@ -86,22 +87,12 @@
 #define IQS5XX_BL_CMD_CRC	0x03
 #define IQS5XX_BL_BLK_LEN_MAX	64
 #define IQS5XX_BL_ID		0x0200
-#define IQS5XX_BL_STATUS_RESET	0x00
 #define IQS5XX_BL_STATUS_AVAIL	0xA5
 #define IQS5XX_BL_STATUS_NONE	0xEE
 #define IQS5XX_BL_CRC_PASS	0x00
 #define IQS5XX_BL_CRC_FAIL	0x01
 #define IQS5XX_BL_ATTEMPTS	3
 
-struct iqs5xx_private {
-	struct i2c_client *client;
-	struct input_dev *input;
-	struct gpio_desc *reset_gpio;
-	struct touchscreen_properties prop;
-	struct mutex lock;
-	u8 bl_status;
-};
-
 struct iqs5xx_dev_id_info {
 	__be16 prod_num;
 	__be16 proj_num;
@@ -133,6 +124,16 @@ struct iqs5xx_status {
 	struct iqs5xx_touch_data touch_data[IQS5XX_NUM_CONTACTS];
 } __packed;
 
+struct iqs5xx_private {
+	struct i2c_client *client;
+	struct input_dev *input;
+	struct gpio_desc *reset_gpio;
+	struct touchscreen_properties prop;
+	struct mutex lock;
+	struct iqs5xx_dev_id_info dev_id_info;
+	u8 exp_file[2];
+};
+
 static int iqs5xx_read_burst(struct i2c_client *client,
 			     u16 reg, void *val, u16 len)
 {
@@ -445,7 +446,7 @@ static int iqs5xx_set_state(struct i2c_client *client, u8 state)
 	struct iqs5xx_private *iqs5xx = i2c_get_clientdata(client);
 	int error1, error2;
 
-	if (iqs5xx->bl_status == IQS5XX_BL_STATUS_RESET)
+	if (!iqs5xx->dev_id_info.bl_status)
 		return 0;
 
 	mutex_lock(&iqs5xx->lock);
@@ -615,6 +616,11 @@ static int iqs5xx_dev_init(struct i2c_client *client)
 		return -EINVAL;
 	}
 
+	error = iqs5xx_read_burst(client, IQS5XX_EXP_FILE,
+				  iqs5xx->exp_file, sizeof(iqs5xx->exp_file));
+	if (error)
+		return error;
+
 	error = iqs5xx_axis_init(client);
 	if (error)
 		return error;
@@ -638,7 +644,7 @@ static int iqs5xx_dev_init(struct i2c_client *client)
 	if (error)
 		return error;
 
-	iqs5xx->bl_status = dev_id_info->bl_status;
+	iqs5xx->dev_id_info = *dev_id_info;
 
 	/*
 	 * The following delay allows ATI to complete before the open and close
@@ -664,7 +670,7 @@ static irqreturn_t iqs5xx_irq(int irq, void *data)
 	 * RDY output during bootloader mode. If the device operates outside of
 	 * bootloader mode, the input device is guaranteed to be allocated.
 	 */
-	if (iqs5xx->bl_status == IQS5XX_BL_STATUS_RESET)
+	if (!iqs5xx->dev_id_info.bl_status)
 		return IRQ_NONE;
 
 	error = iqs5xx_read_burst(client, IQS5XX_SYS_INFO0,
@@ -853,7 +859,7 @@ static int iqs5xx_fw_file_write(struct i2c_client *client, const char *fw_file)
 	int error, error_bl = 0;
 	u8 *pmap;
 
-	if (iqs5xx->bl_status == IQS5XX_BL_STATUS_NONE)
+	if (iqs5xx->dev_id_info.bl_status == IQS5XX_BL_STATUS_NONE)
 		return -EPERM;
 
 	pmap = kzalloc(IQS5XX_PMAP_LEN, GFP_KERNEL);
@@ -873,7 +879,7 @@ static int iqs5xx_fw_file_write(struct i2c_client *client, const char *fw_file)
 	 */
 	disable_irq(client->irq);
 
-	iqs5xx->bl_status = IQS5XX_BL_STATUS_RESET;
+	iqs5xx->dev_id_info.bl_status = 0;
 
 	error = iqs5xx_bl_cmd(client, IQS5XX_BL_CMD_VER, 0);
 	if (error) {
@@ -906,7 +912,7 @@ err_reset:
 
 	error_bl = error;
 	error = iqs5xx_dev_init(client);
-	if (!error && iqs5xx->bl_status == IQS5XX_BL_STATUS_RESET)
+	if (!error && !iqs5xx->dev_id_info.bl_status)
 		error = -EINVAL;
 
 	enable_irq(client->irq);
@@ -966,10 +972,28 @@ static ssize_t fw_file_store(struct device *dev,
 	return count;
 }
 
+static ssize_t fw_info_show(struct device *dev,
+			    struct device_attribute *attr, char *buf)
+{
+	struct iqs5xx_private *iqs5xx = dev_get_drvdata(dev);
+
+	if (!iqs5xx->dev_id_info.bl_status)
+		return -ENODATA;
+
+	return scnprintf(buf, PAGE_SIZE, "%u.%u.%u.%u:%u.%u\n",
+			 be16_to_cpu(iqs5xx->dev_id_info.prod_num),
+			 be16_to_cpu(iqs5xx->dev_id_info.proj_num),
+			 iqs5xx->dev_id_info.major_ver,
+			 iqs5xx->dev_id_info.minor_ver,
+			 iqs5xx->exp_file[0], iqs5xx->exp_file[1]);
+}
+
 static DEVICE_ATTR_WO(fw_file);
+static DEVICE_ATTR_RO(fw_info);
 
 static struct attribute *iqs5xx_attrs[] = {
 	&dev_attr_fw_file.attr,
+	&dev_attr_fw_info.attr,
 	NULL,
 };
 
-- 
cgit v1.2.3


From e7d8e88aec888d4053f4b2be573ab63a39313f83 Mon Sep 17 00:00:00 2001
From: Jeff LaBundy <jeff@labundy.com>
Date: Sun, 21 Mar 2021 21:03:16 -0700
Subject: Input: iqs5xx - remove superfluous revision validation

The vendor-assigned firmware project number is restricted to the
generic project number (15); however the vendor may assign other
project numbers to specific applications and customers.

These custom project numbers may be based on forwards-compatible
firmware revision 1.x. However, the driver unnecessarily rejects
anything older than firmware revision 2.0.

To support other applications, remove these unnecessarily strict
checks and enter the bootloader only for truly incompatible A000
devices.

Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Link: https://lore.kernel.org/r/20210313191236.4366-5-jeff@labundy.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/iqs5xx.c | 40 ++++++++------------------------------
 1 file changed, 8 insertions(+), 32 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/iqs5xx.c b/drivers/input/touchscreen/iqs5xx.c
index f36d170e14b2..0920516124c7 100644
--- a/drivers/input/touchscreen/iqs5xx.c
+++ b/drivers/input/touchscreen/iqs5xx.c
@@ -36,9 +36,6 @@
 #define IQS5XX_PROD_NUM_IQS550	40
 #define IQS5XX_PROD_NUM_IQS572	58
 #define IQS5XX_PROD_NUM_IQS525	52
-#define IQS5XX_PROJ_NUM_A000	0
-#define IQS5XX_PROJ_NUM_B000	15
-#define IQS5XX_MAJOR_VER_MIN	2
 
 #define IQS5XX_SHOW_RESET	BIT(7)
 #define IQS5XX_ACK_RESET	BIT(7)
@@ -87,7 +84,6 @@
 #define IQS5XX_BL_CMD_CRC	0x03
 #define IQS5XX_BL_BLK_LEN_MAX	64
 #define IQS5XX_BL_ID		0x0200
-#define IQS5XX_BL_STATUS_AVAIL	0xA5
 #define IQS5XX_BL_STATUS_NONE	0xEE
 #define IQS5XX_BL_CRC_PASS	0x00
 #define IQS5XX_BL_CRC_FAIL	0x01
@@ -573,7 +569,7 @@ static int iqs5xx_dev_init(struct i2c_client *client)
 	 * the missing zero is prepended).
 	 */
 	buf[0] = 0;
-	dev_id_info = (struct iqs5xx_dev_id_info *)&buf[(buf[1] > 0) ? 0 : 1];
+	dev_id_info = (struct iqs5xx_dev_id_info *)&buf[buf[1] ? 0 : 1];
 
 	switch (be16_to_cpu(dev_id_info->prod_num)) {
 	case IQS5XX_PROD_NUM_IQS550:
@@ -586,36 +582,16 @@ static int iqs5xx_dev_init(struct i2c_client *client)
 		return -EINVAL;
 	}
 
-	switch (be16_to_cpu(dev_id_info->proj_num)) {
-	case IQS5XX_PROJ_NUM_A000:
-		dev_err(&client->dev, "Unsupported project number: %u\n",
-			be16_to_cpu(dev_id_info->proj_num));
-		return iqs5xx_bl_open(client);
-	case IQS5XX_PROJ_NUM_B000:
-		break;
-	default:
-		dev_err(&client->dev, "Unrecognized project number: %u\n",
-			be16_to_cpu(dev_id_info->proj_num));
-		return -EINVAL;
-	}
-
-	if (dev_id_info->major_ver < IQS5XX_MAJOR_VER_MIN) {
-		dev_err(&client->dev, "Unsupported major version: %u\n",
-			dev_id_info->major_ver);
+	/*
+	 * With the product number recognized yet shifted by one byte, open the
+	 * bootloader and wait for user space to convert the A000 device into a
+	 * B000 device via new firmware.
+	 */
+	if (buf[1]) {
+		dev_err(&client->dev, "Opening bootloader for A000 device\n");
 		return iqs5xx_bl_open(client);
 	}
 
-	switch (dev_id_info->bl_status) {
-	case IQS5XX_BL_STATUS_AVAIL:
-	case IQS5XX_BL_STATUS_NONE:
-		break;
-	default:
-		dev_err(&client->dev,
-			"Unrecognized bootloader status: 0x%02X\n",
-			dev_id_info->bl_status);
-		return -EINVAL;
-	}
-
 	error = iqs5xx_read_burst(client, IQS5XX_EXP_FILE,
 				  iqs5xx->exp_file, sizeof(iqs5xx->exp_file));
 	if (error)
-- 
cgit v1.2.3


From 95a6d961401d7e7e4cdd15c5c454b335d71dd0b5 Mon Sep 17 00:00:00 2001
From: Jeff LaBundy <jeff@labundy.com>
Date: Sun, 21 Mar 2021 21:04:17 -0700
Subject: Input: iqs5xx - close bootloader using hardware reset

The bootloader can be closed using the 'execute' command (0x02) or
hardware reset. Rather than using the former option for successful
firmware update procedures and reserving the latter for recovering
the device upon failure, simply use hardware reset for all cases.

The post-bootloader initialization delay increases marginally when
triggered by a hardware reset, so increase the wait time to ensure
the device does not subsequently fail to respond.

As part of this change, refactor the return path to avoid an extra
assignment and to make the logic a bit smaller.

Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Link: https://lore.kernel.org/r/20210313191236.4366-6-jeff@labundy.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/iqs5xx.c | 24 +++++++-----------------
 1 file changed, 7 insertions(+), 17 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/iqs5xx.c b/drivers/input/touchscreen/iqs5xx.c
index 0920516124c7..a990c176abf7 100644
--- a/drivers/input/touchscreen/iqs5xx.c
+++ b/drivers/input/touchscreen/iqs5xx.c
@@ -832,7 +832,7 @@ static int iqs5xx_fw_file_parse(struct i2c_client *client,
 static int iqs5xx_fw_file_write(struct i2c_client *client, const char *fw_file)
 {
 	struct iqs5xx_private *iqs5xx = i2c_get_clientdata(client);
-	int error, error_bl = 0;
+	int error, error_init = 0;
 	u8 *pmap;
 
 	if (iqs5xx->dev_id_info.bl_status == IQS5XX_BL_STATUS_NONE)
@@ -875,21 +875,14 @@ static int iqs5xx_fw_file_write(struct i2c_client *client, const char *fw_file)
 	error = iqs5xx_bl_verify(client, IQS5XX_CSTM,
 				 pmap + IQS5XX_CHKSM_LEN + IQS5XX_APP_LEN,
 				 IQS5XX_CSTM_LEN);
-	if (error)
-		goto err_reset;
-
-	error = iqs5xx_bl_cmd(client, IQS5XX_BL_CMD_EXEC, 0);
 
 err_reset:
-	if (error) {
-		iqs5xx_reset(client);
-		usleep_range(10000, 10100);
-	}
+	iqs5xx_reset(client);
+	usleep_range(15000, 15100);
 
-	error_bl = error;
-	error = iqs5xx_dev_init(client);
-	if (!error && !iqs5xx->dev_id_info.bl_status)
-		error = -EINVAL;
+	error_init = iqs5xx_dev_init(client);
+	if (!iqs5xx->dev_id_info.bl_status)
+		error_init = error_init ? : -EINVAL;
 
 	enable_irq(client->irq);
 
@@ -898,10 +891,7 @@ err_reset:
 err_kfree:
 	kfree(pmap);
 
-	if (error_bl)
-		return error_bl;
-
-	return error;
+	return error ? : error_init;
 }
 
 static ssize_t fw_file_store(struct device *dev,
-- 
cgit v1.2.3


From b6621f72cc88ef5ed8341bea8104a0f5a72d07a2 Mon Sep 17 00:00:00 2001
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: Mon, 22 Mar 2021 14:55:05 -0700
Subject: Input: wacom_i2c - do not force interrupt trigger

Instead of forcing interrupt trigger to "level low" rely on the
platform to set it up according to how it is wired on the given
board.

Reviewed-by: Alistair Francis <alistair@alistair23.me>
Link: https://lore.kernel.org/r/20210321220043.318239-1-dmitry.torokhov@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/wacom_i2c.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/wacom_i2c.c b/drivers/input/touchscreen/wacom_i2c.c
index 1afc6bde2891..609ff84e7693 100644
--- a/drivers/input/touchscreen/wacom_i2c.c
+++ b/drivers/input/touchscreen/wacom_i2c.c
@@ -195,8 +195,7 @@ static int wacom_i2c_probe(struct i2c_client *client,
 	input_set_drvdata(input, wac_i2c);
 
 	error = request_threaded_irq(client->irq, NULL, wacom_i2c_irq,
-				     IRQF_TRIGGER_LOW | IRQF_ONESHOT,
-				     "wacom_i2c", wac_i2c);
+				     IRQF_ONESHOT, "wacom_i2c", wac_i2c);
 	if (error) {
 		dev_err(&client->dev,
 			"Failed to enable IRQ, error: %d\n", error);
-- 
cgit v1.2.3


From c75cf86201e37c2dd6b8077ed6de2776471f5be5 Mon Sep 17 00:00:00 2001
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: Mon, 22 Mar 2021 14:55:28 -0700
Subject: Input: wacom_i2c - switch to using managed resources

This simplifies error unwinding path and allows us to get rid of
remove() method.

Reviewed-by: Alistair Francis <alistair@alistair23.me>
Link: https://lore.kernel.org/r/20210321220043.318239-2-dmitry.torokhov@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/wacom_i2c.c | 55 +++++++++++------------------------
 1 file changed, 17 insertions(+), 38 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/wacom_i2c.c b/drivers/input/touchscreen/wacom_i2c.c
index 609ff84e7693..22826c387da5 100644
--- a/drivers/input/touchscreen/wacom_i2c.c
+++ b/drivers/input/touchscreen/wacom_i2c.c
@@ -145,15 +145,16 @@ static void wacom_i2c_close(struct input_dev *dev)
 }
 
 static int wacom_i2c_probe(struct i2c_client *client,
-				     const struct i2c_device_id *id)
+			   const struct i2c_device_id *id)
 {
+	struct device *dev = &client->dev;
 	struct wacom_i2c *wac_i2c;
 	struct input_dev *input;
 	struct wacom_features features = { 0 };
 	int error;
 
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
-		dev_err(&client->dev, "i2c_check_functionality error\n");
+		dev_err(dev, "i2c_check_functionality error\n");
 		return -EIO;
 	}
 
@@ -161,21 +162,22 @@ static int wacom_i2c_probe(struct i2c_client *client,
 	if (error)
 		return error;
 
-	wac_i2c = kzalloc(sizeof(*wac_i2c), GFP_KERNEL);
-	input = input_allocate_device();
-	if (!wac_i2c || !input) {
-		error = -ENOMEM;
-		goto err_free_mem;
-	}
+	wac_i2c = devm_kzalloc(dev, sizeof(*wac_i2c), GFP_KERNEL);
+	if (!wac_i2c)
+		return -ENOMEM;
 
 	wac_i2c->client = client;
+
+	input = devm_input_allocate_device(dev);
+	if (!input)
+		return -ENOMEM;
+
 	wac_i2c->input = input;
 
 	input->name = "Wacom I2C Digitizer";
 	input->id.bustype = BUS_I2C;
 	input->id.vendor = 0x56a;
 	input->id.version = features.fw_version;
-	input->dev.parent = &client->dev;
 	input->open = wacom_i2c_open;
 	input->close = wacom_i2c_close;
 
@@ -194,12 +196,11 @@ static int wacom_i2c_probe(struct i2c_client *client,
 
 	input_set_drvdata(input, wac_i2c);
 
-	error = request_threaded_irq(client->irq, NULL, wacom_i2c_irq,
-				     IRQF_ONESHOT, "wacom_i2c", wac_i2c);
+	error = devm_request_threaded_irq(dev, client->irq, NULL, wacom_i2c_irq,
+					  IRQF_ONESHOT, "wacom_i2c", wac_i2c);
 	if (error) {
-		dev_err(&client->dev,
-			"Failed to enable IRQ, error: %d\n", error);
-		goto err_free_mem;
+		dev_err(dev, "Failed to request IRQ: %d\n", error);
+		return error;
 	}
 
 	/* Disable the IRQ, we'll enable it in wac_i2c_open() */
@@ -207,31 +208,10 @@ static int wacom_i2c_probe(struct i2c_client *client,
 
 	error = input_register_device(wac_i2c->input);
 	if (error) {
-		dev_err(&client->dev,
-			"Failed to register input device, error: %d\n", error);
-		goto err_free_irq;
+		dev_err(dev, "Failed to register input device: %d\n", error);
+		return error;
 	}
 
-	i2c_set_clientdata(client, wac_i2c);
-	return 0;
-
-err_free_irq:
-	free_irq(client->irq, wac_i2c);
-err_free_mem:
-	input_free_device(input);
-	kfree(wac_i2c);
-
-	return error;
-}
-
-static int wacom_i2c_remove(struct i2c_client *client)
-{
-	struct wacom_i2c *wac_i2c = i2c_get_clientdata(client);
-
-	free_irq(client->irq, wac_i2c);
-	input_unregister_device(wac_i2c->input);
-	kfree(wac_i2c);
-
 	return 0;
 }
 
@@ -268,7 +248,6 @@ static struct i2c_driver wacom_i2c_driver = {
 	},
 
 	.probe		= wacom_i2c_probe,
-	.remove		= wacom_i2c_remove,
 	.id_table	= wacom_i2c_id,
 };
 module_i2c_driver(wacom_i2c_driver);
-- 
cgit v1.2.3


From e28b5c8d0aaee116a0dd42c602fd667f8ffe2629 Mon Sep 17 00:00:00 2001
From: Jeff LaBundy <jeff@labundy.com>
Date: Mon, 22 Mar 2021 16:42:25 -0700
Subject: Input: touchscreen - move helper functions to core

Some devices outside of drivers/input/touchscreen/ can still make
use of the touchscreen helper functions. Therefore, it was agreed
in [1] to move them outside of drivers/input/touchscreen/ so that
other devices can call them without INPUT_TOUCHSCREEN being set.

As part of this change, 'of' is dropped from the filename because
the helpers no longer actually use OF. No changes are made to the
file contents whatsoever.

Based on the feedback in [2], the corresponding binding documents
(touchscreen.yaml and touchscreen.txt) are left in their original
locations.

[1] https://patchwork.kernel.org/patch/11924029/
[2] https://patchwork.kernel.org/patch/12042037/

Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Link: https://lore.kernel.org/r/20210301234928.4298-2-jeff@labundy.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/Makefile                     |   1 +
 drivers/input/touchscreen.c                | 206 +++++++++++++++++++++++++++++
 drivers/input/touchscreen/Kconfig          |   4 -
 drivers/input/touchscreen/Makefile         |   1 -
 drivers/input/touchscreen/of_touchscreen.c | 206 -----------------------------
 5 files changed, 207 insertions(+), 211 deletions(-)
 create mode 100644 drivers/input/touchscreen.c
 delete mode 100644 drivers/input/touchscreen/of_touchscreen.c

(limited to 'drivers')

diff --git a/drivers/input/Makefile b/drivers/input/Makefile
index d8f5310e22ba..037cc595106c 100644
--- a/drivers/input/Makefile
+++ b/drivers/input/Makefile
@@ -7,6 +7,7 @@
 
 obj-$(CONFIG_INPUT)		+= input-core.o
 input-core-y := input.o input-compat.o input-mt.o input-poller.o ff-core.o
+input-core-y += touchscreen.o
 
 obj-$(CONFIG_INPUT_FF_MEMLESS)	+= ff-memless.o
 obj-$(CONFIG_INPUT_SPARSEKMAP)	+= sparse-keymap.o
diff --git a/drivers/input/touchscreen.c b/drivers/input/touchscreen.c
new file mode 100644
index 000000000000..97342e14b4f1
--- /dev/null
+++ b/drivers/input/touchscreen.c
@@ -0,0 +1,206 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Generic DT helper functions for touchscreen devices
+ *
+ *  Copyright (c) 2014 Sebastian Reichel <sre@kernel.org>
+ */
+
+#include <linux/property.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/input/touchscreen.h>
+#include <linux/module.h>
+
+static bool touchscreen_get_prop_u32(struct device *dev,
+				     const char *property,
+				     unsigned int default_value,
+				     unsigned int *value)
+{
+	u32 val;
+	int error;
+
+	error = device_property_read_u32(dev, property, &val);
+	if (error) {
+		*value = default_value;
+		return false;
+	}
+
+	*value = val;
+	return true;
+}
+
+static void touchscreen_set_params(struct input_dev *dev,
+				   unsigned long axis,
+				   int min, int max, int fuzz)
+{
+	struct input_absinfo *absinfo;
+
+	if (!test_bit(axis, dev->absbit)) {
+		dev_warn(&dev->dev,
+			 "DT specifies parameters but the axis %lu is not set up\n",
+			 axis);
+		return;
+	}
+
+	absinfo = &dev->absinfo[axis];
+	absinfo->minimum = min;
+	absinfo->maximum = max;
+	absinfo->fuzz = fuzz;
+}
+
+/**
+ * touchscreen_parse_properties - parse common touchscreen DT properties
+ * @input: input device that should be parsed
+ * @multitouch: specifies whether parsed properties should be applied to
+ *	single-touch or multi-touch axes
+ * @prop: pointer to a struct touchscreen_properties into which to store
+ *	axis swap and invert info for use with touchscreen_report_x_y();
+ *	or %NULL
+ *
+ * This function parses common DT properties for touchscreens and setups the
+ * input device accordingly. The function keeps previously set up default
+ * values if no value is specified via DT.
+ */
+void touchscreen_parse_properties(struct input_dev *input, bool multitouch,
+				  struct touchscreen_properties *prop)
+{
+	struct device *dev = input->dev.parent;
+	struct input_absinfo *absinfo;
+	unsigned int axis, axis_x, axis_y;
+	unsigned int minimum, maximum, fuzz;
+	bool data_present;
+
+	input_alloc_absinfo(input);
+	if (!input->absinfo)
+		return;
+
+	axis_x = multitouch ? ABS_MT_POSITION_X : ABS_X;
+	axis_y = multitouch ? ABS_MT_POSITION_Y : ABS_Y;
+
+	data_present = touchscreen_get_prop_u32(dev, "touchscreen-min-x",
+						input_abs_get_min(input, axis_x),
+						&minimum) |
+		       touchscreen_get_prop_u32(dev, "touchscreen-size-x",
+						input_abs_get_max(input,
+								  axis_x) + 1,
+						&maximum) |
+		       touchscreen_get_prop_u32(dev, "touchscreen-fuzz-x",
+						input_abs_get_fuzz(input, axis_x),
+						&fuzz);
+	if (data_present)
+		touchscreen_set_params(input, axis_x, minimum, maximum - 1, fuzz);
+
+	data_present = touchscreen_get_prop_u32(dev, "touchscreen-min-y",
+						input_abs_get_min(input, axis_y),
+						&minimum) |
+		       touchscreen_get_prop_u32(dev, "touchscreen-size-y",
+						input_abs_get_max(input,
+								  axis_y) + 1,
+						&maximum) |
+		       touchscreen_get_prop_u32(dev, "touchscreen-fuzz-y",
+						input_abs_get_fuzz(input, axis_y),
+						&fuzz);
+	if (data_present)
+		touchscreen_set_params(input, axis_y, minimum, maximum - 1, fuzz);
+
+	axis = multitouch ? ABS_MT_PRESSURE : ABS_PRESSURE;
+	data_present = touchscreen_get_prop_u32(dev,
+						"touchscreen-max-pressure",
+						input_abs_get_max(input, axis),
+						&maximum) |
+		       touchscreen_get_prop_u32(dev,
+						"touchscreen-fuzz-pressure",
+						input_abs_get_fuzz(input, axis),
+						&fuzz);
+	if (data_present)
+		touchscreen_set_params(input, axis, 0, maximum, fuzz);
+
+	if (!prop)
+		return;
+
+	prop->max_x = input_abs_get_max(input, axis_x);
+	prop->max_y = input_abs_get_max(input, axis_y);
+
+	prop->invert_x =
+		device_property_read_bool(dev, "touchscreen-inverted-x");
+	if (prop->invert_x) {
+		absinfo = &input->absinfo[axis_x];
+		absinfo->maximum -= absinfo->minimum;
+		absinfo->minimum = 0;
+	}
+
+	prop->invert_y =
+		device_property_read_bool(dev, "touchscreen-inverted-y");
+	if (prop->invert_y) {
+		absinfo = &input->absinfo[axis_y];
+		absinfo->maximum -= absinfo->minimum;
+		absinfo->minimum = 0;
+	}
+
+	prop->swap_x_y =
+		device_property_read_bool(dev, "touchscreen-swapped-x-y");
+	if (prop->swap_x_y)
+		swap(input->absinfo[axis_x], input->absinfo[axis_y]);
+}
+EXPORT_SYMBOL(touchscreen_parse_properties);
+
+static void
+touchscreen_apply_prop_to_x_y(const struct touchscreen_properties *prop,
+			      unsigned int *x, unsigned int *y)
+{
+	if (prop->invert_x)
+		*x = prop->max_x - *x;
+
+	if (prop->invert_y)
+		*y = prop->max_y - *y;
+
+	if (prop->swap_x_y)
+		swap(*x, *y);
+}
+
+/**
+ * touchscreen_set_mt_pos - Set input_mt_pos coordinates
+ * @pos: input_mt_pos to set coordinates of
+ * @prop: pointer to a struct touchscreen_properties
+ * @x: X coordinate to store in pos
+ * @y: Y coordinate to store in pos
+ *
+ * Adjust the passed in x and y values applying any axis inversion and
+ * swapping requested in the passed in touchscreen_properties and store
+ * the result in a struct input_mt_pos.
+ */
+void touchscreen_set_mt_pos(struct input_mt_pos *pos,
+			    const struct touchscreen_properties *prop,
+			    unsigned int x, unsigned int y)
+{
+	touchscreen_apply_prop_to_x_y(prop, &x, &y);
+	pos->x = x;
+	pos->y = y;
+}
+EXPORT_SYMBOL(touchscreen_set_mt_pos);
+
+/**
+ * touchscreen_report_pos - Report touchscreen coordinates
+ * @input: input_device to report coordinates for
+ * @prop: pointer to a struct touchscreen_properties
+ * @x: X coordinate to report
+ * @y: Y coordinate to report
+ * @multitouch: Report coordinates on single-touch or multi-touch axes
+ *
+ * Adjust the passed in x and y values applying any axis inversion and
+ * swapping requested in the passed in touchscreen_properties and then
+ * report the resulting coordinates on the input_dev's x and y axis.
+ */
+void touchscreen_report_pos(struct input_dev *input,
+			    const struct touchscreen_properties *prop,
+			    unsigned int x, unsigned int y,
+			    bool multitouch)
+{
+	touchscreen_apply_prop_to_x_y(prop, &x, &y);
+	input_report_abs(input, multitouch ? ABS_MT_POSITION_X : ABS_X, x);
+	input_report_abs(input, multitouch ? ABS_MT_POSITION_Y : ABS_Y, y);
+}
+EXPORT_SYMBOL(touchscreen_report_pos);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Device-tree helpers functions for touchscreen devices");
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 529614d364fe..aead3ad6ba6a 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -12,10 +12,6 @@ menuconfig INPUT_TOUCHSCREEN
 
 if INPUT_TOUCHSCREEN
 
-config TOUCHSCREEN_PROPERTIES
-	def_tristate INPUT
-	depends on INPUT
-
 config TOUCHSCREEN_88PM860X
 	tristate "Marvell 88PM860x touchscreen"
 	depends on MFD_88PM860X
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 6233541e9173..80cd241b4c1b 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -7,7 +7,6 @@
 
 wm97xx-ts-y := wm97xx-core.o
 
-obj-$(CONFIG_TOUCHSCREEN_PROPERTIES)	+= of_touchscreen.o
 obj-$(CONFIG_TOUCHSCREEN_88PM860X)	+= 88pm860x-ts.o
 obj-$(CONFIG_TOUCHSCREEN_AD7877)	+= ad7877.o
 obj-$(CONFIG_TOUCHSCREEN_AD7879)	+= ad7879.o
diff --git a/drivers/input/touchscreen/of_touchscreen.c b/drivers/input/touchscreen/of_touchscreen.c
deleted file mode 100644
index 97342e14b4f1..000000000000
--- a/drivers/input/touchscreen/of_touchscreen.c
+++ /dev/null
@@ -1,206 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- *  Generic DT helper functions for touchscreen devices
- *
- *  Copyright (c) 2014 Sebastian Reichel <sre@kernel.org>
- */
-
-#include <linux/property.h>
-#include <linux/input.h>
-#include <linux/input/mt.h>
-#include <linux/input/touchscreen.h>
-#include <linux/module.h>
-
-static bool touchscreen_get_prop_u32(struct device *dev,
-				     const char *property,
-				     unsigned int default_value,
-				     unsigned int *value)
-{
-	u32 val;
-	int error;
-
-	error = device_property_read_u32(dev, property, &val);
-	if (error) {
-		*value = default_value;
-		return false;
-	}
-
-	*value = val;
-	return true;
-}
-
-static void touchscreen_set_params(struct input_dev *dev,
-				   unsigned long axis,
-				   int min, int max, int fuzz)
-{
-	struct input_absinfo *absinfo;
-
-	if (!test_bit(axis, dev->absbit)) {
-		dev_warn(&dev->dev,
-			 "DT specifies parameters but the axis %lu is not set up\n",
-			 axis);
-		return;
-	}
-
-	absinfo = &dev->absinfo[axis];
-	absinfo->minimum = min;
-	absinfo->maximum = max;
-	absinfo->fuzz = fuzz;
-}
-
-/**
- * touchscreen_parse_properties - parse common touchscreen DT properties
- * @input: input device that should be parsed
- * @multitouch: specifies whether parsed properties should be applied to
- *	single-touch or multi-touch axes
- * @prop: pointer to a struct touchscreen_properties into which to store
- *	axis swap and invert info for use with touchscreen_report_x_y();
- *	or %NULL
- *
- * This function parses common DT properties for touchscreens and setups the
- * input device accordingly. The function keeps previously set up default
- * values if no value is specified via DT.
- */
-void touchscreen_parse_properties(struct input_dev *input, bool multitouch,
-				  struct touchscreen_properties *prop)
-{
-	struct device *dev = input->dev.parent;
-	struct input_absinfo *absinfo;
-	unsigned int axis, axis_x, axis_y;
-	unsigned int minimum, maximum, fuzz;
-	bool data_present;
-
-	input_alloc_absinfo(input);
-	if (!input->absinfo)
-		return;
-
-	axis_x = multitouch ? ABS_MT_POSITION_X : ABS_X;
-	axis_y = multitouch ? ABS_MT_POSITION_Y : ABS_Y;
-
-	data_present = touchscreen_get_prop_u32(dev, "touchscreen-min-x",
-						input_abs_get_min(input, axis_x),
-						&minimum) |
-		       touchscreen_get_prop_u32(dev, "touchscreen-size-x",
-						input_abs_get_max(input,
-								  axis_x) + 1,
-						&maximum) |
-		       touchscreen_get_prop_u32(dev, "touchscreen-fuzz-x",
-						input_abs_get_fuzz(input, axis_x),
-						&fuzz);
-	if (data_present)
-		touchscreen_set_params(input, axis_x, minimum, maximum - 1, fuzz);
-
-	data_present = touchscreen_get_prop_u32(dev, "touchscreen-min-y",
-						input_abs_get_min(input, axis_y),
-						&minimum) |
-		       touchscreen_get_prop_u32(dev, "touchscreen-size-y",
-						input_abs_get_max(input,
-								  axis_y) + 1,
-						&maximum) |
-		       touchscreen_get_prop_u32(dev, "touchscreen-fuzz-y",
-						input_abs_get_fuzz(input, axis_y),
-						&fuzz);
-	if (data_present)
-		touchscreen_set_params(input, axis_y, minimum, maximum - 1, fuzz);
-
-	axis = multitouch ? ABS_MT_PRESSURE : ABS_PRESSURE;
-	data_present = touchscreen_get_prop_u32(dev,
-						"touchscreen-max-pressure",
-						input_abs_get_max(input, axis),
-						&maximum) |
-		       touchscreen_get_prop_u32(dev,
-						"touchscreen-fuzz-pressure",
-						input_abs_get_fuzz(input, axis),
-						&fuzz);
-	if (data_present)
-		touchscreen_set_params(input, axis, 0, maximum, fuzz);
-
-	if (!prop)
-		return;
-
-	prop->max_x = input_abs_get_max(input, axis_x);
-	prop->max_y = input_abs_get_max(input, axis_y);
-
-	prop->invert_x =
-		device_property_read_bool(dev, "touchscreen-inverted-x");
-	if (prop->invert_x) {
-		absinfo = &input->absinfo[axis_x];
-		absinfo->maximum -= absinfo->minimum;
-		absinfo->minimum = 0;
-	}
-
-	prop->invert_y =
-		device_property_read_bool(dev, "touchscreen-inverted-y");
-	if (prop->invert_y) {
-		absinfo = &input->absinfo[axis_y];
-		absinfo->maximum -= absinfo->minimum;
-		absinfo->minimum = 0;
-	}
-
-	prop->swap_x_y =
-		device_property_read_bool(dev, "touchscreen-swapped-x-y");
-	if (prop->swap_x_y)
-		swap(input->absinfo[axis_x], input->absinfo[axis_y]);
-}
-EXPORT_SYMBOL(touchscreen_parse_properties);
-
-static void
-touchscreen_apply_prop_to_x_y(const struct touchscreen_properties *prop,
-			      unsigned int *x, unsigned int *y)
-{
-	if (prop->invert_x)
-		*x = prop->max_x - *x;
-
-	if (prop->invert_y)
-		*y = prop->max_y - *y;
-
-	if (prop->swap_x_y)
-		swap(*x, *y);
-}
-
-/**
- * touchscreen_set_mt_pos - Set input_mt_pos coordinates
- * @pos: input_mt_pos to set coordinates of
- * @prop: pointer to a struct touchscreen_properties
- * @x: X coordinate to store in pos
- * @y: Y coordinate to store in pos
- *
- * Adjust the passed in x and y values applying any axis inversion and
- * swapping requested in the passed in touchscreen_properties and store
- * the result in a struct input_mt_pos.
- */
-void touchscreen_set_mt_pos(struct input_mt_pos *pos,
-			    const struct touchscreen_properties *prop,
-			    unsigned int x, unsigned int y)
-{
-	touchscreen_apply_prop_to_x_y(prop, &x, &y);
-	pos->x = x;
-	pos->y = y;
-}
-EXPORT_SYMBOL(touchscreen_set_mt_pos);
-
-/**
- * touchscreen_report_pos - Report touchscreen coordinates
- * @input: input_device to report coordinates for
- * @prop: pointer to a struct touchscreen_properties
- * @x: X coordinate to report
- * @y: Y coordinate to report
- * @multitouch: Report coordinates on single-touch or multi-touch axes
- *
- * Adjust the passed in x and y values applying any axis inversion and
- * swapping requested in the passed in touchscreen_properties and then
- * report the resulting coordinates on the input_dev's x and y axis.
- */
-void touchscreen_report_pos(struct input_dev *input,
-			    const struct touchscreen_properties *prop,
-			    unsigned int x, unsigned int y,
-			    bool multitouch)
-{
-	touchscreen_apply_prop_to_x_y(prop, &x, &y);
-	input_report_abs(input, multitouch ? ABS_MT_POSITION_X : ABS_X, x);
-	input_report_abs(input, multitouch ? ABS_MT_POSITION_Y : ABS_Y, y);
-}
-EXPORT_SYMBOL(touchscreen_report_pos);
-
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("Device-tree helpers functions for touchscreen devices");
-- 
cgit v1.2.3


From 51e01fc04f1285b0e515a5262fc58682565d859c Mon Sep 17 00:00:00 2001
From: Jeff LaBundy <jeff@labundy.com>
Date: Mon, 22 Mar 2021 16:43:00 -0700
Subject: Input: touchscreen - broaden use-cases described in comments

Now that the helper functions have been moved to drivers/input/ so
that all input devices may use them, the introductory comments can
be updated to remove any implication that the helper functions are
solely limited to touchscreens.

This patch also scrubs any remaining use of 'DT' since there isn't
any actual dependency on OF. A minor spelling error is resolved as
well ('setups' -> 'sets up').

Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Link: https://lore.kernel.org/r/20210301234928.4298-3-jeff@labundy.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen.c b/drivers/input/touchscreen.c
index 97342e14b4f1..dd18cb917c4d 100644
--- a/drivers/input/touchscreen.c
+++ b/drivers/input/touchscreen.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- *  Generic DT helper functions for touchscreen devices
+ *  Generic helper functions for touchscreens and other two-dimensional
+ *  pointing devices
  *
  *  Copyright (c) 2014 Sebastian Reichel <sre@kernel.org>
  */
@@ -37,7 +38,7 @@ static void touchscreen_set_params(struct input_dev *dev,
 
 	if (!test_bit(axis, dev->absbit)) {
 		dev_warn(&dev->dev,
-			 "DT specifies parameters but the axis %lu is not set up\n",
+			 "Parameters are specified but the axis %lu is not set up\n",
 			 axis);
 		return;
 	}
@@ -49,7 +50,7 @@ static void touchscreen_set_params(struct input_dev *dev,
 }
 
 /**
- * touchscreen_parse_properties - parse common touchscreen DT properties
+ * touchscreen_parse_properties - parse common touchscreen properties
  * @input: input device that should be parsed
  * @multitouch: specifies whether parsed properties should be applied to
  *	single-touch or multi-touch axes
@@ -57,9 +58,9 @@ static void touchscreen_set_params(struct input_dev *dev,
  *	axis swap and invert info for use with touchscreen_report_x_y();
  *	or %NULL
  *
- * This function parses common DT properties for touchscreens and setups the
+ * This function parses common properties for touchscreens and sets up the
  * input device accordingly. The function keeps previously set up default
- * values if no value is specified via DT.
+ * values if no value is specified.
  */
 void touchscreen_parse_properties(struct input_dev *input, bool multitouch,
 				  struct touchscreen_properties *prop)
@@ -203,4 +204,4 @@ void touchscreen_report_pos(struct input_dev *input,
 EXPORT_SYMBOL(touchscreen_report_pos);
 
 MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("Device-tree helpers functions for touchscreen devices");
+MODULE_DESCRIPTION("Helper functions for touchscreens and other devices");
-- 
cgit v1.2.3


From f1d2809de97adc422967b6de59f0f6199769eb93 Mon Sep 17 00:00:00 2001
From: Jeff LaBundy <jeff@labundy.com>
Date: Mon, 22 Mar 2021 16:43:58 -0700
Subject: Input: Add support for Azoteq IQS626A

This patch adds support for the Azoteq IQS626A capacitive touch
controller.

Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Link: https://lore.kernel.org/r/20210301234928.4298-5-jeff@labundy.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/misc/Kconfig   |   11 +
 drivers/input/misc/Makefile  |    1 +
 drivers/input/misc/iqs626a.c | 1838 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 1850 insertions(+)
 create mode 100644 drivers/input/misc/iqs626a.c

(limited to 'drivers')

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index ad1b6c90bc4d..bbab23a58c59 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -752,6 +752,17 @@ config INPUT_IQS269A
 	  To compile this driver as a module, choose M here: the
 	  module will be called iqs269a.
 
+config INPUT_IQS626A
+	tristate "Azoteq IQS626A capacitive touch controller"
+	depends on I2C
+	select REGMAP_I2C
+	help
+	  Say Y to enable support for the Azoteq IQS626A capacitive
+	  touch controller.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called iqs626a.
+
 config INPUT_CMA3000
 	tristate "VTI CMA3000 Tri-axis accelerometer"
 	help
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 7f202ba8f775..034c80a7ffa1 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -42,6 +42,7 @@ obj-$(CONFIG_INPUT_HISI_POWERKEY)	+= hisi_powerkey.o
 obj-$(CONFIG_HP_SDC_RTC)		+= hp_sdc_rtc.o
 obj-$(CONFIG_INPUT_IMS_PCU)		+= ims-pcu.o
 obj-$(CONFIG_INPUT_IQS269A)		+= iqs269a.o
+obj-$(CONFIG_INPUT_IQS626A)		+= iqs626a.o
 obj-$(CONFIG_INPUT_IXP4XX_BEEPER)	+= ixp4xx-beeper.o
 obj-$(CONFIG_INPUT_KEYSPAN_REMOTE)	+= keyspan_remote.o
 obj-$(CONFIG_INPUT_KXTJ9)		+= kxtj9.o
diff --git a/drivers/input/misc/iqs626a.c b/drivers/input/misc/iqs626a.c
new file mode 100644
index 000000000000..d57e996732cf
--- /dev/null
+++ b/drivers/input/misc/iqs626a.c
@@ -0,0 +1,1838 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Azoteq IQS626A Capacitive Touch Controller
+ *
+ * Copyright (C) 2020 Jeff LaBundy <jeff@labundy.com>
+ *
+ * This driver registers up to 2 input devices: one representing capacitive or
+ * inductive keys as well as Hall-effect switches, and one for a trackpad that
+ * can express various gestures.
+ */
+
+#include <linux/bits.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/input/touchscreen.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#define IQS626_VER_INFO				0x00
+#define IQS626_VER_INFO_PROD_NUM		0x51
+
+#define IQS626_SYS_FLAGS			0x02
+#define IQS626_SYS_FLAGS_SHOW_RESET		BIT(15)
+#define IQS626_SYS_FLAGS_IN_ATI			BIT(12)
+#define IQS626_SYS_FLAGS_PWR_MODE_MASK		GENMASK(9, 8)
+#define IQS626_SYS_FLAGS_PWR_MODE_SHIFT		8
+
+#define IQS626_HALL_OUTPUT			0x23
+
+#define IQS626_SYS_SETTINGS			0x80
+#define IQS626_SYS_SETTINGS_CLK_DIV		BIT(15)
+#define IQS626_SYS_SETTINGS_ULP_AUTO		BIT(14)
+#define IQS626_SYS_SETTINGS_DIS_AUTO		BIT(13)
+#define IQS626_SYS_SETTINGS_PWR_MODE_MASK	GENMASK(12, 11)
+#define IQS626_SYS_SETTINGS_PWR_MODE_SHIFT	11
+#define IQS626_SYS_SETTINGS_PWR_MODE_MAX	3
+#define IQS626_SYS_SETTINGS_ULP_UPDATE_MASK	GENMASK(10, 8)
+#define IQS626_SYS_SETTINGS_ULP_UPDATE_SHIFT	8
+#define IQS626_SYS_SETTINGS_ULP_UPDATE_MAX	7
+#define IQS626_SYS_SETTINGS_EVENT_MODE		BIT(5)
+#define IQS626_SYS_SETTINGS_EVENT_MODE_LP	BIT(4)
+#define IQS626_SYS_SETTINGS_REDO_ATI		BIT(2)
+#define IQS626_SYS_SETTINGS_ACK_RESET		BIT(0)
+
+#define IQS626_MISC_A_ATI_BAND_DISABLE		BIT(7)
+#define IQS626_MISC_A_TPx_LTA_UPDATE_MASK	GENMASK(6, 4)
+#define IQS626_MISC_A_TPx_LTA_UPDATE_SHIFT	4
+#define IQS626_MISC_A_TPx_LTA_UPDATE_MAX	7
+#define IQS626_MISC_A_ATI_LP_ONLY		BIT(3)
+#define IQS626_MISC_A_GPIO3_SELECT_MASK		GENMASK(2, 0)
+#define IQS626_MISC_A_GPIO3_SELECT_MAX		7
+
+#define IQS626_EVENT_MASK_SYS			BIT(6)
+#define IQS626_EVENT_MASK_GESTURE		BIT(3)
+#define IQS626_EVENT_MASK_DEEP			BIT(2)
+#define IQS626_EVENT_MASK_TOUCH			BIT(1)
+#define IQS626_EVENT_MASK_PROX			BIT(0)
+
+#define IQS626_RATE_NP_MS_MAX			255
+#define IQS626_RATE_LP_MS_MAX			255
+#define IQS626_RATE_ULP_MS_MAX			4080
+#define IQS626_TIMEOUT_PWR_MS_MAX		130560
+#define IQS626_TIMEOUT_LTA_MS_MAX		130560
+
+#define IQS626_MISC_B_RESEED_UI_SEL_MASK	GENMASK(7, 6)
+#define IQS626_MISC_B_RESEED_UI_SEL_SHIFT	6
+#define IQS626_MISC_B_RESEED_UI_SEL_MAX		3
+#define IQS626_MISC_B_THRESH_EXTEND		BIT(5)
+#define IQS626_MISC_B_TRACKING_UI_ENABLE	BIT(4)
+#define IQS626_MISC_B_TPx_SWIPE			BIT(3)
+#define IQS626_MISC_B_RESEED_OFFSET		BIT(2)
+#define IQS626_MISC_B_FILT_STR_TPx		GENMASK(1, 0)
+
+#define IQS626_THRESH_SWIPE_MAX			255
+#define IQS626_TIMEOUT_TAP_MS_MAX		4080
+#define IQS626_TIMEOUT_SWIPE_MS_MAX		4080
+
+#define IQS626_CHx_ENG_0_MEAS_CAP_SIZE		BIT(7)
+#define IQS626_CHx_ENG_0_RX_TERM_VSS		BIT(5)
+#define IQS626_CHx_ENG_0_LINEARIZE		BIT(4)
+#define IQS626_CHx_ENG_0_DUAL_DIR		BIT(3)
+#define IQS626_CHx_ENG_0_FILT_DISABLE		BIT(2)
+#define IQS626_CHx_ENG_0_ATI_MODE_MASK		GENMASK(1, 0)
+#define IQS626_CHx_ENG_0_ATI_MODE_MAX		3
+
+#define IQS626_CHx_ENG_1_CCT_HIGH_1		BIT(7)
+#define IQS626_CHx_ENG_1_CCT_HIGH_0		BIT(6)
+#define IQS626_CHx_ENG_1_PROJ_BIAS_MASK		GENMASK(5, 4)
+#define IQS626_CHx_ENG_1_PROJ_BIAS_SHIFT	4
+#define IQS626_CHx_ENG_1_PROJ_BIAS_MAX		3
+#define IQS626_CHx_ENG_1_CCT_ENABLE		BIT(3)
+#define IQS626_CHx_ENG_1_SENSE_FREQ_MASK	GENMASK(2, 1)
+#define IQS626_CHx_ENG_1_SENSE_FREQ_SHIFT	1
+#define IQS626_CHx_ENG_1_SENSE_FREQ_MAX		3
+#define IQS626_CHx_ENG_1_ATI_BAND_TIGHTEN	BIT(0)
+
+#define IQS626_CHx_ENG_2_LOCAL_CAP_MASK		GENMASK(7, 6)
+#define IQS626_CHx_ENG_2_LOCAL_CAP_SHIFT	6
+#define IQS626_CHx_ENG_2_LOCAL_CAP_MAX		3
+#define IQS626_CHx_ENG_2_LOCAL_CAP_ENABLE	BIT(5)
+#define IQS626_CHx_ENG_2_SENSE_MODE_MASK	GENMASK(3, 0)
+#define IQS626_CHx_ENG_2_SENSE_MODE_MAX		15
+
+#define IQS626_CHx_ENG_3_TX_FREQ_MASK		GENMASK(5, 4)
+#define IQS626_CHx_ENG_3_TX_FREQ_SHIFT		4
+#define IQS626_CHx_ENG_3_TX_FREQ_MAX		3
+#define IQS626_CHx_ENG_3_INV_LOGIC		BIT(0)
+
+#define IQS626_CHx_ENG_4_RX_TERM_VREG		BIT(6)
+#define IQS626_CHx_ENG_4_CCT_LOW_1		BIT(5)
+#define IQS626_CHx_ENG_4_CCT_LOW_0		BIT(4)
+#define IQS626_CHx_ENG_4_COMP_DISABLE		BIT(1)
+#define IQS626_CHx_ENG_4_STATIC_ENABLE		BIT(0)
+
+#define IQS626_TPx_ATI_BASE_MIN			45
+#define IQS626_TPx_ATI_BASE_MAX			300
+#define IQS626_CHx_ATI_BASE_MASK		GENMASK(7, 6)
+#define IQS626_CHx_ATI_BASE_75			0x00
+#define IQS626_CHx_ATI_BASE_100			0x40
+#define IQS626_CHx_ATI_BASE_150			0x80
+#define IQS626_CHx_ATI_BASE_200			0xC0
+#define IQS626_CHx_ATI_TARGET_MASK		GENMASK(5, 0)
+#define IQS626_CHx_ATI_TARGET_MAX		2016
+
+#define IQS626_CHx_THRESH_MAX			255
+#define IQS626_CHx_HYST_DEEP_MASK		GENMASK(7, 4)
+#define IQS626_CHx_HYST_DEEP_SHIFT		4
+#define IQS626_CHx_HYST_TOUCH_MASK		GENMASK(3, 0)
+#define IQS626_CHx_HYST_MAX			15
+
+#define IQS626_FILT_STR_NP_TPx_MASK		GENMASK(7, 6)
+#define IQS626_FILT_STR_NP_TPx_SHIFT		6
+#define IQS626_FILT_STR_LP_TPx_MASK		GENMASK(5, 4)
+#define IQS626_FILT_STR_LP_TPx_SHIFT		4
+
+#define IQS626_FILT_STR_NP_CNT_MASK		GENMASK(7, 6)
+#define IQS626_FILT_STR_NP_CNT_SHIFT		6
+#define IQS626_FILT_STR_LP_CNT_MASK		GENMASK(5, 4)
+#define IQS626_FILT_STR_LP_CNT_SHIFT		4
+#define IQS626_FILT_STR_NP_LTA_MASK		GENMASK(3, 2)
+#define IQS626_FILT_STR_NP_LTA_SHIFT		2
+#define IQS626_FILT_STR_LP_LTA_MASK		GENMASK(1, 0)
+#define IQS626_FILT_STR_MAX			3
+
+#define IQS626_ULP_PROJ_ENABLE			BIT(4)
+#define IQS626_GEN_WEIGHT_MAX			255
+
+#define IQS626_MAX_REG				0xFF
+
+#define IQS626_NUM_CH_TP_3			9
+#define IQS626_NUM_CH_TP_2			6
+#define IQS626_NUM_CH_GEN			3
+#define IQS626_NUM_CRx_TX			8
+
+#define IQS626_PWR_MODE_POLL_SLEEP_US		50000
+#define IQS626_PWR_MODE_POLL_TIMEOUT_US		500000
+
+#define iqs626_irq_wait()			usleep_range(350, 400)
+
+enum iqs626_ch_id {
+	IQS626_CH_ULP_0,
+	IQS626_CH_TP_2,
+	IQS626_CH_TP_3,
+	IQS626_CH_GEN_0,
+	IQS626_CH_GEN_1,
+	IQS626_CH_GEN_2,
+	IQS626_CH_HALL,
+};
+
+enum iqs626_rx_inactive {
+	IQS626_RX_INACTIVE_VSS,
+	IQS626_RX_INACTIVE_FLOAT,
+	IQS626_RX_INACTIVE_VREG,
+};
+
+enum iqs626_st_offs {
+	IQS626_ST_OFFS_PROX,
+	IQS626_ST_OFFS_DIR,
+	IQS626_ST_OFFS_TOUCH,
+	IQS626_ST_OFFS_DEEP,
+};
+
+enum iqs626_th_offs {
+	IQS626_TH_OFFS_PROX,
+	IQS626_TH_OFFS_TOUCH,
+	IQS626_TH_OFFS_DEEP,
+};
+
+enum iqs626_event_id {
+	IQS626_EVENT_PROX_DN,
+	IQS626_EVENT_PROX_UP,
+	IQS626_EVENT_TOUCH_DN,
+	IQS626_EVENT_TOUCH_UP,
+	IQS626_EVENT_DEEP_DN,
+	IQS626_EVENT_DEEP_UP,
+};
+
+enum iqs626_gesture_id {
+	IQS626_GESTURE_FLICK_X_POS,
+	IQS626_GESTURE_FLICK_X_NEG,
+	IQS626_GESTURE_FLICK_Y_POS,
+	IQS626_GESTURE_FLICK_Y_NEG,
+	IQS626_GESTURE_TAP,
+	IQS626_GESTURE_HOLD,
+	IQS626_NUM_GESTURES,
+};
+
+struct iqs626_event_desc {
+	const char *name;
+	enum iqs626_st_offs st_offs;
+	enum iqs626_th_offs th_offs;
+	bool dir_up;
+	u8 mask;
+};
+
+static const struct iqs626_event_desc iqs626_events[] = {
+	[IQS626_EVENT_PROX_DN] = {
+		.name = "event-prox",
+		.st_offs = IQS626_ST_OFFS_PROX,
+		.th_offs = IQS626_TH_OFFS_PROX,
+		.mask = IQS626_EVENT_MASK_PROX,
+	},
+	[IQS626_EVENT_PROX_UP] = {
+		.name = "event-prox-alt",
+		.st_offs = IQS626_ST_OFFS_PROX,
+		.th_offs = IQS626_TH_OFFS_PROX,
+		.dir_up = true,
+		.mask = IQS626_EVENT_MASK_PROX,
+	},
+	[IQS626_EVENT_TOUCH_DN] = {
+		.name = "event-touch",
+		.st_offs = IQS626_ST_OFFS_TOUCH,
+		.th_offs = IQS626_TH_OFFS_TOUCH,
+		.mask = IQS626_EVENT_MASK_TOUCH,
+	},
+	[IQS626_EVENT_TOUCH_UP] = {
+		.name = "event-touch-alt",
+		.st_offs = IQS626_ST_OFFS_TOUCH,
+		.th_offs = IQS626_TH_OFFS_TOUCH,
+		.dir_up = true,
+		.mask = IQS626_EVENT_MASK_TOUCH,
+	},
+	[IQS626_EVENT_DEEP_DN] = {
+		.name = "event-deep",
+		.st_offs = IQS626_ST_OFFS_DEEP,
+		.th_offs = IQS626_TH_OFFS_DEEP,
+		.mask = IQS626_EVENT_MASK_DEEP,
+	},
+	[IQS626_EVENT_DEEP_UP] = {
+		.name = "event-deep-alt",
+		.st_offs = IQS626_ST_OFFS_DEEP,
+		.th_offs = IQS626_TH_OFFS_DEEP,
+		.dir_up = true,
+		.mask = IQS626_EVENT_MASK_DEEP,
+	},
+};
+
+struct iqs626_ver_info {
+	u8 prod_num;
+	u8 sw_num;
+	u8 hw_num;
+	u8 padding;
+} __packed;
+
+struct iqs626_flags {
+	__be16 system;
+	u8 gesture;
+	u8 padding_a;
+	u8 states[4];
+	u8 ref_active;
+	u8 padding_b;
+	u8 comp_min;
+	u8 comp_max;
+	u8 trackpad_x;
+	u8 trackpad_y;
+} __packed;
+
+struct iqs626_ch_reg_ulp {
+	u8 thresh[2];
+	u8 hyst;
+	u8 filter;
+	u8 engine[2];
+	u8 ati_target;
+	u8 padding;
+	__be16 ati_comp;
+	u8 rx_enable;
+	u8 tx_enable;
+} __packed;
+
+struct iqs626_ch_reg_tp {
+	u8 thresh;
+	u8 ati_base;
+	__be16 ati_comp;
+} __packed;
+
+struct iqs626_tp_grp_reg {
+	u8 hyst;
+	u8 ati_target;
+	u8 engine[2];
+	struct iqs626_ch_reg_tp ch_reg_tp[IQS626_NUM_CH_TP_3];
+} __packed;
+
+struct iqs626_ch_reg_gen {
+	u8 thresh[3];
+	u8 padding;
+	u8 hyst;
+	u8 ati_target;
+	__be16 ati_comp;
+	u8 engine[5];
+	u8 filter;
+	u8 rx_enable;
+	u8 tx_enable;
+	u8 assoc_select;
+	u8 assoc_weight;
+} __packed;
+
+struct iqs626_ch_reg_hall {
+	u8 engine;
+	u8 thresh;
+	u8 hyst;
+	u8 ati_target;
+	__be16 ati_comp;
+} __packed;
+
+struct iqs626_sys_reg {
+	__be16 general;
+	u8 misc_a;
+	u8 event_mask;
+	u8 active;
+	u8 reseed;
+	u8 rate_np;
+	u8 rate_lp;
+	u8 rate_ulp;
+	u8 timeout_pwr;
+	u8 timeout_rdy;
+	u8 timeout_lta;
+	u8 misc_b;
+	u8 thresh_swipe;
+	u8 timeout_tap;
+	u8 timeout_swipe;
+	u8 redo_ati;
+	u8 padding;
+	struct iqs626_ch_reg_ulp ch_reg_ulp;
+	struct iqs626_tp_grp_reg tp_grp_reg;
+	struct iqs626_ch_reg_gen ch_reg_gen[IQS626_NUM_CH_GEN];
+	struct iqs626_ch_reg_hall ch_reg_hall;
+} __packed;
+
+struct iqs626_channel_desc {
+	const char *name;
+	int num_ch;
+	u8 active;
+	bool events[ARRAY_SIZE(iqs626_events)];
+};
+
+static const struct iqs626_channel_desc iqs626_channels[] = {
+	[IQS626_CH_ULP_0] = {
+		.name = "ulp-0",
+		.num_ch = 1,
+		.active = BIT(0),
+		.events = {
+			[IQS626_EVENT_PROX_DN] = true,
+			[IQS626_EVENT_PROX_UP] = true,
+			[IQS626_EVENT_TOUCH_DN] = true,
+			[IQS626_EVENT_TOUCH_UP] = true,
+		},
+	},
+	[IQS626_CH_TP_2] = {
+		.name = "trackpad-3x2",
+		.num_ch = IQS626_NUM_CH_TP_2,
+		.active = BIT(1),
+		.events = {
+			[IQS626_EVENT_TOUCH_DN] = true,
+		},
+	},
+	[IQS626_CH_TP_3] = {
+		.name = "trackpad-3x3",
+		.num_ch = IQS626_NUM_CH_TP_3,
+		.active = BIT(2) | BIT(1),
+		.events = {
+			[IQS626_EVENT_TOUCH_DN] = true,
+		},
+	},
+	[IQS626_CH_GEN_0] = {
+		.name = "generic-0",
+		.num_ch = 1,
+		.active = BIT(4),
+		.events = {
+			[IQS626_EVENT_PROX_DN] = true,
+			[IQS626_EVENT_PROX_UP] = true,
+			[IQS626_EVENT_TOUCH_DN] = true,
+			[IQS626_EVENT_TOUCH_UP] = true,
+			[IQS626_EVENT_DEEP_DN] = true,
+			[IQS626_EVENT_DEEP_UP] = true,
+		},
+	},
+	[IQS626_CH_GEN_1] = {
+		.name = "generic-1",
+		.num_ch = 1,
+		.active = BIT(5),
+		.events = {
+			[IQS626_EVENT_PROX_DN] = true,
+			[IQS626_EVENT_PROX_UP] = true,
+			[IQS626_EVENT_TOUCH_DN] = true,
+			[IQS626_EVENT_TOUCH_UP] = true,
+			[IQS626_EVENT_DEEP_DN] = true,
+			[IQS626_EVENT_DEEP_UP] = true,
+		},
+	},
+	[IQS626_CH_GEN_2] = {
+		.name = "generic-2",
+		.num_ch = 1,
+		.active = BIT(6),
+		.events = {
+			[IQS626_EVENT_PROX_DN] = true,
+			[IQS626_EVENT_PROX_UP] = true,
+			[IQS626_EVENT_TOUCH_DN] = true,
+			[IQS626_EVENT_TOUCH_UP] = true,
+			[IQS626_EVENT_DEEP_DN] = true,
+			[IQS626_EVENT_DEEP_UP] = true,
+		},
+	},
+	[IQS626_CH_HALL] = {
+		.name = "hall",
+		.num_ch = 1,
+		.active = BIT(7),
+		.events = {
+			[IQS626_EVENT_TOUCH_DN] = true,
+			[IQS626_EVENT_TOUCH_UP] = true,
+		},
+	},
+};
+
+struct iqs626_private {
+	struct i2c_client *client;
+	struct regmap *regmap;
+	struct iqs626_sys_reg sys_reg;
+	struct completion ati_done;
+	struct input_dev *keypad;
+	struct input_dev *trackpad;
+	struct touchscreen_properties prop;
+	unsigned int kp_type[ARRAY_SIZE(iqs626_channels)]
+			    [ARRAY_SIZE(iqs626_events)];
+	unsigned int kp_code[ARRAY_SIZE(iqs626_channels)]
+			    [ARRAY_SIZE(iqs626_events)];
+	unsigned int tp_code[IQS626_NUM_GESTURES];
+	unsigned int suspend_mode;
+};
+
+static int iqs626_parse_events(struct iqs626_private *iqs626,
+			       const struct fwnode_handle *ch_node,
+			       enum iqs626_ch_id ch_id)
+{
+	struct iqs626_sys_reg *sys_reg = &iqs626->sys_reg;
+	struct i2c_client *client = iqs626->client;
+	const struct fwnode_handle *ev_node;
+	const char *ev_name;
+	u8 *thresh, *hyst;
+	unsigned int thresh_tp[IQS626_NUM_CH_TP_3];
+	unsigned int val;
+	int num_ch = iqs626_channels[ch_id].num_ch;
+	int error, i, j;
+
+	switch (ch_id) {
+	case IQS626_CH_ULP_0:
+		thresh = sys_reg->ch_reg_ulp.thresh;
+		hyst = &sys_reg->ch_reg_ulp.hyst;
+		break;
+
+	case IQS626_CH_TP_2:
+	case IQS626_CH_TP_3:
+		thresh = &sys_reg->tp_grp_reg.ch_reg_tp[0].thresh;
+		hyst = &sys_reg->tp_grp_reg.hyst;
+		break;
+
+	case IQS626_CH_GEN_0:
+	case IQS626_CH_GEN_1:
+	case IQS626_CH_GEN_2:
+		i = ch_id - IQS626_CH_GEN_0;
+		thresh = sys_reg->ch_reg_gen[i].thresh;
+		hyst = &sys_reg->ch_reg_gen[i].hyst;
+		break;
+
+	case IQS626_CH_HALL:
+		thresh = &sys_reg->ch_reg_hall.thresh;
+		hyst = &sys_reg->ch_reg_hall.hyst;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(iqs626_events); i++) {
+		if (!iqs626_channels[ch_id].events[i])
+			continue;
+
+		if (ch_id == IQS626_CH_TP_2 || ch_id == IQS626_CH_TP_3) {
+			/*
+			 * Trackpad touch events are simply described under the
+			 * trackpad child node.
+			 */
+			ev_node = ch_node;
+		} else {
+			ev_name = iqs626_events[i].name;
+			ev_node = fwnode_get_named_child_node(ch_node, ev_name);
+			if (!ev_node)
+				continue;
+
+			if (!fwnode_property_read_u32(ev_node, "linux,code",
+						      &val)) {
+				iqs626->kp_code[ch_id][i] = val;
+
+				if (fwnode_property_read_u32(ev_node,
+							     "linux,input-type",
+							     &val)) {
+					if (ch_id == IQS626_CH_HALL)
+						val = EV_SW;
+					else
+						val = EV_KEY;
+				}
+
+				if (val != EV_KEY && val != EV_SW) {
+					dev_err(&client->dev,
+						"Invalid input type: %u\n",
+						val);
+					return -EINVAL;
+				}
+
+				iqs626->kp_type[ch_id][i] = val;
+
+				sys_reg->event_mask &= ~iqs626_events[i].mask;
+			}
+		}
+
+		if (!fwnode_property_read_u32(ev_node, "azoteq,hyst", &val)) {
+			if (val > IQS626_CHx_HYST_MAX) {
+				dev_err(&client->dev,
+					"Invalid %s channel hysteresis: %u\n",
+					fwnode_get_name(ch_node), val);
+				return -EINVAL;
+			}
+
+			if (i == IQS626_EVENT_DEEP_DN ||
+			    i == IQS626_EVENT_DEEP_UP) {
+				*hyst &= ~IQS626_CHx_HYST_DEEP_MASK;
+				*hyst |= (val << IQS626_CHx_HYST_DEEP_SHIFT);
+			} else if (i == IQS626_EVENT_TOUCH_DN ||
+				   i == IQS626_EVENT_TOUCH_UP) {
+				*hyst &= ~IQS626_CHx_HYST_TOUCH_MASK;
+				*hyst |= val;
+			}
+		}
+
+		if (ch_id != IQS626_CH_TP_2 && ch_id != IQS626_CH_TP_3 &&
+		    !fwnode_property_read_u32(ev_node, "azoteq,thresh", &val)) {
+			if (val > IQS626_CHx_THRESH_MAX) {
+				dev_err(&client->dev,
+					"Invalid %s channel threshold: %u\n",
+					fwnode_get_name(ch_node), val);
+				return -EINVAL;
+			}
+
+			if (ch_id == IQS626_CH_HALL)
+				*thresh = val;
+			else
+				*(thresh + iqs626_events[i].th_offs) = val;
+
+			continue;
+		}
+
+		if (!fwnode_property_present(ev_node, "azoteq,thresh"))
+			continue;
+
+		error = fwnode_property_read_u32_array(ev_node, "azoteq,thresh",
+						       thresh_tp, num_ch);
+		if (error) {
+			dev_err(&client->dev,
+				"Failed to read %s channel thresholds: %d\n",
+				fwnode_get_name(ch_node), error);
+			return error;
+		}
+
+		for (j = 0; j < num_ch; j++) {
+			if (thresh_tp[j] > IQS626_CHx_THRESH_MAX) {
+				dev_err(&client->dev,
+					"Invalid %s channel threshold: %u\n",
+					fwnode_get_name(ch_node), thresh_tp[j]);
+				return -EINVAL;
+			}
+
+			sys_reg->tp_grp_reg.ch_reg_tp[j].thresh = thresh_tp[j];
+		}
+	}
+
+	return 0;
+}
+
+static int iqs626_parse_ati_target(struct iqs626_private *iqs626,
+				   const struct fwnode_handle *ch_node,
+				   enum iqs626_ch_id ch_id)
+{
+	struct iqs626_sys_reg *sys_reg = &iqs626->sys_reg;
+	struct i2c_client *client = iqs626->client;
+	unsigned int ati_base[IQS626_NUM_CH_TP_3];
+	unsigned int val;
+	u8 *ati_target;
+	int num_ch = iqs626_channels[ch_id].num_ch;
+	int error, i;
+
+	switch (ch_id) {
+	case IQS626_CH_ULP_0:
+		ati_target = &sys_reg->ch_reg_ulp.ati_target;
+		break;
+
+	case IQS626_CH_TP_2:
+	case IQS626_CH_TP_3:
+		ati_target = &sys_reg->tp_grp_reg.ati_target;
+		break;
+
+	case IQS626_CH_GEN_0:
+	case IQS626_CH_GEN_1:
+	case IQS626_CH_GEN_2:
+		i = ch_id - IQS626_CH_GEN_0;
+		ati_target = &sys_reg->ch_reg_gen[i].ati_target;
+		break;
+
+	case IQS626_CH_HALL:
+		ati_target = &sys_reg->ch_reg_hall.ati_target;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,ati-target", &val)) {
+		if (val > IQS626_CHx_ATI_TARGET_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel ATI target: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		*ati_target &= ~IQS626_CHx_ATI_TARGET_MASK;
+		*ati_target |= (val / 32);
+	}
+
+	if (ch_id != IQS626_CH_TP_2 && ch_id != IQS626_CH_TP_3 &&
+	    !fwnode_property_read_u32(ch_node, "azoteq,ati-base", &val)) {
+		switch (val) {
+		case 75:
+			val = IQS626_CHx_ATI_BASE_75;
+			break;
+
+		case 100:
+			val = IQS626_CHx_ATI_BASE_100;
+			break;
+
+		case 150:
+			val = IQS626_CHx_ATI_BASE_150;
+			break;
+
+		case 200:
+			val = IQS626_CHx_ATI_BASE_200;
+			break;
+
+		default:
+			dev_err(&client->dev,
+				"Invalid %s channel ATI base: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		*ati_target &= ~IQS626_CHx_ATI_BASE_MASK;
+		*ati_target |= val;
+
+		return 0;
+	}
+
+	if (!fwnode_property_present(ch_node, "azoteq,ati-base"))
+		return 0;
+
+	error = fwnode_property_read_u32_array(ch_node, "azoteq,ati-base",
+					       ati_base, num_ch);
+	if (error) {
+		dev_err(&client->dev,
+			"Failed to read %s channel ATI bases: %d\n",
+			fwnode_get_name(ch_node), error);
+		return error;
+	}
+
+	for (i = 0; i < num_ch; i++) {
+		if (ati_base[i] < IQS626_TPx_ATI_BASE_MIN ||
+		    ati_base[i] > IQS626_TPx_ATI_BASE_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel ATI base: %u\n",
+				fwnode_get_name(ch_node), ati_base[i]);
+			return -EINVAL;
+		}
+
+		ati_base[i] -= IQS626_TPx_ATI_BASE_MIN;
+		sys_reg->tp_grp_reg.ch_reg_tp[i].ati_base = ati_base[i];
+	}
+
+	return 0;
+}
+
+static int iqs626_parse_pins(struct iqs626_private *iqs626,
+			     const struct fwnode_handle *ch_node,
+			     const char *propname, u8 *enable)
+{
+	struct i2c_client *client = iqs626->client;
+	unsigned int val[IQS626_NUM_CRx_TX];
+	int error, count, i;
+
+	if (!fwnode_property_present(ch_node, propname))
+		return 0;
+
+	count = fwnode_property_count_u32(ch_node, propname);
+	if (count > IQS626_NUM_CRx_TX) {
+		dev_err(&client->dev,
+			"Too many %s channel CRX/TX pins present\n",
+			fwnode_get_name(ch_node));
+		return -EINVAL;
+	} else if (count < 0) {
+		dev_err(&client->dev,
+			"Failed to count %s channel CRX/TX pins: %d\n",
+			fwnode_get_name(ch_node), count);
+		return count;
+	}
+
+	error = fwnode_property_read_u32_array(ch_node, propname, val, count);
+	if (error) {
+		dev_err(&client->dev,
+			"Failed to read %s channel CRX/TX pins: %d\n",
+			fwnode_get_name(ch_node), error);
+		return error;
+	}
+
+	*enable = 0;
+
+	for (i = 0; i < count; i++) {
+		if (val[i] >= IQS626_NUM_CRx_TX) {
+			dev_err(&client->dev,
+				"Invalid %s channel CRX/TX pin: %u\n",
+				fwnode_get_name(ch_node), val[i]);
+			return -EINVAL;
+		}
+
+		*enable |= BIT(val[i]);
+	}
+
+	return 0;
+}
+
+static int iqs626_parse_trackpad(struct iqs626_private *iqs626,
+				 const struct fwnode_handle *ch_node)
+{
+	struct iqs626_sys_reg *sys_reg = &iqs626->sys_reg;
+	struct i2c_client *client = iqs626->client;
+	u8 *hyst = &sys_reg->tp_grp_reg.hyst;
+	unsigned int val;
+	int error, count;
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,lta-update", &val)) {
+		if (val > IQS626_MISC_A_TPx_LTA_UPDATE_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel update rate: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		sys_reg->misc_a &= ~IQS626_MISC_A_TPx_LTA_UPDATE_MASK;
+		sys_reg->misc_a |= (val << IQS626_MISC_A_TPx_LTA_UPDATE_SHIFT);
+	}
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-trackpad",
+				      &val)) {
+		if (val > IQS626_FILT_STR_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel filter strength: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		sys_reg->misc_b &= ~IQS626_MISC_B_FILT_STR_TPx;
+		sys_reg->misc_b |= val;
+	}
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-np-cnt",
+				      &val)) {
+		if (val > IQS626_FILT_STR_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel filter strength: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		*hyst &= ~IQS626_FILT_STR_NP_TPx_MASK;
+		*hyst |= (val << IQS626_FILT_STR_NP_TPx_SHIFT);
+	}
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-lp-cnt",
+				      &val)) {
+		if (val > IQS626_FILT_STR_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel filter strength: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		*hyst &= ~IQS626_FILT_STR_LP_TPx_MASK;
+		*hyst |= (val << IQS626_FILT_STR_LP_TPx_SHIFT);
+	}
+
+	if (!fwnode_property_present(ch_node, "linux,keycodes"))
+		return 0;
+
+	count = fwnode_property_count_u32(ch_node, "linux,keycodes");
+	if (count > IQS626_NUM_GESTURES) {
+		dev_err(&client->dev, "Too many keycodes present\n");
+		return -EINVAL;
+	} else if (count < 0) {
+		dev_err(&client->dev, "Failed to count keycodes: %d\n", count);
+		return count;
+	}
+
+	error = fwnode_property_read_u32_array(ch_node, "linux,keycodes",
+					       iqs626->tp_code, count);
+	if (error) {
+		dev_err(&client->dev, "Failed to read keycodes: %d\n", error);
+		return error;
+	}
+
+	sys_reg->misc_b &= ~IQS626_MISC_B_TPx_SWIPE;
+	if (fwnode_property_present(ch_node, "azoteq,gesture-swipe"))
+		sys_reg->misc_b |= IQS626_MISC_B_TPx_SWIPE;
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,timeout-tap-ms",
+				      &val)) {
+		if (val > IQS626_TIMEOUT_TAP_MS_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel timeout: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		sys_reg->timeout_tap = val / 16;
+	}
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,timeout-swipe-ms",
+				      &val)) {
+		if (val > IQS626_TIMEOUT_SWIPE_MS_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel timeout: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		sys_reg->timeout_swipe = val / 16;
+	}
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,thresh-swipe",
+				      &val)) {
+		if (val > IQS626_THRESH_SWIPE_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel threshold: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		sys_reg->thresh_swipe = val;
+	}
+
+	sys_reg->event_mask &= ~IQS626_EVENT_MASK_GESTURE;
+
+	return 0;
+}
+
+static int iqs626_parse_channel(struct iqs626_private *iqs626,
+				const struct fwnode_handle *ch_node,
+				enum iqs626_ch_id ch_id)
+{
+	struct iqs626_sys_reg *sys_reg = &iqs626->sys_reg;
+	struct i2c_client *client = iqs626->client;
+	u8 *engine, *filter, *rx_enable, *tx_enable;
+	u8 *assoc_select, *assoc_weight;
+	unsigned int val;
+	int error, i;
+
+	switch (ch_id) {
+	case IQS626_CH_ULP_0:
+		engine = sys_reg->ch_reg_ulp.engine;
+		break;
+
+	case IQS626_CH_TP_2:
+	case IQS626_CH_TP_3:
+		engine = sys_reg->tp_grp_reg.engine;
+		break;
+
+	case IQS626_CH_GEN_0:
+	case IQS626_CH_GEN_1:
+	case IQS626_CH_GEN_2:
+		i = ch_id - IQS626_CH_GEN_0;
+		engine = sys_reg->ch_reg_gen[i].engine;
+		break;
+
+	case IQS626_CH_HALL:
+		engine = &sys_reg->ch_reg_hall.engine;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	*engine |= IQS626_CHx_ENG_0_MEAS_CAP_SIZE;
+	if (fwnode_property_present(ch_node, "azoteq,meas-cap-decrease"))
+		*engine &= ~IQS626_CHx_ENG_0_MEAS_CAP_SIZE;
+
+	*engine |= IQS626_CHx_ENG_0_RX_TERM_VSS;
+	if (!fwnode_property_read_u32(ch_node, "azoteq,rx-inactive", &val)) {
+		switch (val) {
+		case IQS626_RX_INACTIVE_VSS:
+			break;
+
+		case IQS626_RX_INACTIVE_FLOAT:
+			*engine &= ~IQS626_CHx_ENG_0_RX_TERM_VSS;
+			if (ch_id == IQS626_CH_GEN_0 ||
+			    ch_id == IQS626_CH_GEN_1 ||
+			    ch_id == IQS626_CH_GEN_2)
+				*(engine + 4) &= ~IQS626_CHx_ENG_4_RX_TERM_VREG;
+			break;
+
+		case IQS626_RX_INACTIVE_VREG:
+			if (ch_id == IQS626_CH_GEN_0 ||
+			    ch_id == IQS626_CH_GEN_1 ||
+			    ch_id == IQS626_CH_GEN_2) {
+				*engine &= ~IQS626_CHx_ENG_0_RX_TERM_VSS;
+				*(engine + 4) |= IQS626_CHx_ENG_4_RX_TERM_VREG;
+				break;
+			}
+			fallthrough;
+
+		default:
+			dev_err(&client->dev,
+				"Invalid %s channel CRX pin termination: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+	}
+
+	*engine &= ~IQS626_CHx_ENG_0_LINEARIZE;
+	if (fwnode_property_present(ch_node, "azoteq,linearize"))
+		*engine |= IQS626_CHx_ENG_0_LINEARIZE;
+
+	*engine &= ~IQS626_CHx_ENG_0_DUAL_DIR;
+	if (fwnode_property_present(ch_node, "azoteq,dual-direction"))
+		*engine |= IQS626_CHx_ENG_0_DUAL_DIR;
+
+	*engine &= ~IQS626_CHx_ENG_0_FILT_DISABLE;
+	if (fwnode_property_present(ch_node, "azoteq,filt-disable"))
+		*engine |= IQS626_CHx_ENG_0_FILT_DISABLE;
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,ati-mode", &val)) {
+		if (val > IQS626_CHx_ENG_0_ATI_MODE_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel ATI mode: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		*engine &= ~IQS626_CHx_ENG_0_ATI_MODE_MASK;
+		*engine |= val;
+	}
+
+	if (ch_id == IQS626_CH_HALL)
+		return 0;
+
+	*(engine + 1) &= ~IQS626_CHx_ENG_1_CCT_ENABLE;
+	if (!fwnode_property_read_u32(ch_node, "azoteq,cct-increase",
+				      &val) && val) {
+		unsigned int orig_val = val--;
+
+		/*
+		 * In the case of the generic channels, the charge cycle time
+		 * field doubles in size and straddles two separate registers.
+		 */
+		if (ch_id == IQS626_CH_GEN_0 ||
+		    ch_id == IQS626_CH_GEN_1 ||
+		    ch_id == IQS626_CH_GEN_2) {
+			*(engine + 4) &= ~IQS626_CHx_ENG_4_CCT_LOW_1;
+			if (val & BIT(1))
+				*(engine + 4) |= IQS626_CHx_ENG_4_CCT_LOW_1;
+
+			*(engine + 4) &= ~IQS626_CHx_ENG_4_CCT_LOW_0;
+			if (val & BIT(0))
+				*(engine + 4) |= IQS626_CHx_ENG_4_CCT_LOW_0;
+
+			val >>= 2;
+		}
+
+		if (val & ~GENMASK(1, 0)) {
+			dev_err(&client->dev,
+				"Invalid %s channel charge cycle time: %u\n",
+				fwnode_get_name(ch_node), orig_val);
+			return -EINVAL;
+		}
+
+		*(engine + 1) &= ~IQS626_CHx_ENG_1_CCT_HIGH_1;
+		if (val & BIT(1))
+			*(engine + 1) |= IQS626_CHx_ENG_1_CCT_HIGH_1;
+
+		*(engine + 1) &= ~IQS626_CHx_ENG_1_CCT_HIGH_0;
+		if (val & BIT(0))
+			*(engine + 1) |= IQS626_CHx_ENG_1_CCT_HIGH_0;
+
+		*(engine + 1) |= IQS626_CHx_ENG_1_CCT_ENABLE;
+	}
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,proj-bias", &val)) {
+		if (val > IQS626_CHx_ENG_1_PROJ_BIAS_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel bias current: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		*(engine + 1) &= ~IQS626_CHx_ENG_1_PROJ_BIAS_MASK;
+		*(engine + 1) |= (val << IQS626_CHx_ENG_1_PROJ_BIAS_SHIFT);
+	}
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,sense-freq", &val)) {
+		if (val > IQS626_CHx_ENG_1_SENSE_FREQ_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel sensing frequency: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		*(engine + 1) &= ~IQS626_CHx_ENG_1_SENSE_FREQ_MASK;
+		*(engine + 1) |= (val << IQS626_CHx_ENG_1_SENSE_FREQ_SHIFT);
+	}
+
+	*(engine + 1) &= ~IQS626_CHx_ENG_1_ATI_BAND_TIGHTEN;
+	if (fwnode_property_present(ch_node, "azoteq,ati-band-tighten"))
+		*(engine + 1) |= IQS626_CHx_ENG_1_ATI_BAND_TIGHTEN;
+
+	if (ch_id == IQS626_CH_TP_2 || ch_id == IQS626_CH_TP_3)
+		return iqs626_parse_trackpad(iqs626, ch_node);
+
+	if (ch_id == IQS626_CH_ULP_0) {
+		sys_reg->ch_reg_ulp.hyst &= ~IQS626_ULP_PROJ_ENABLE;
+		if (fwnode_property_present(ch_node, "azoteq,proj-enable"))
+			sys_reg->ch_reg_ulp.hyst |= IQS626_ULP_PROJ_ENABLE;
+
+		filter = &sys_reg->ch_reg_ulp.filter;
+
+		rx_enable = &sys_reg->ch_reg_ulp.rx_enable;
+		tx_enable = &sys_reg->ch_reg_ulp.tx_enable;
+	} else {
+		i = ch_id - IQS626_CH_GEN_0;
+		filter = &sys_reg->ch_reg_gen[i].filter;
+
+		rx_enable = &sys_reg->ch_reg_gen[i].rx_enable;
+		tx_enable = &sys_reg->ch_reg_gen[i].tx_enable;
+	}
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-np-cnt",
+				      &val)) {
+		if (val > IQS626_FILT_STR_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel filter strength: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		*filter &= ~IQS626_FILT_STR_NP_CNT_MASK;
+		*filter |= (val << IQS626_FILT_STR_NP_CNT_SHIFT);
+	}
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-lp-cnt",
+				      &val)) {
+		if (val > IQS626_FILT_STR_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel filter strength: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		*filter &= ~IQS626_FILT_STR_LP_CNT_MASK;
+		*filter |= (val << IQS626_FILT_STR_LP_CNT_SHIFT);
+	}
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-np-lta",
+				      &val)) {
+		if (val > IQS626_FILT_STR_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel filter strength: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		*filter &= ~IQS626_FILT_STR_NP_LTA_MASK;
+		*filter |= (val << IQS626_FILT_STR_NP_LTA_SHIFT);
+	}
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,filt-str-lp-lta",
+				      &val)) {
+		if (val > IQS626_FILT_STR_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel filter strength: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		*filter &= ~IQS626_FILT_STR_LP_LTA_MASK;
+		*filter |= val;
+	}
+
+	error = iqs626_parse_pins(iqs626, ch_node, "azoteq,rx-enable",
+				  rx_enable);
+	if (error)
+		return error;
+
+	error = iqs626_parse_pins(iqs626, ch_node, "azoteq,tx-enable",
+				  tx_enable);
+	if (error)
+		return error;
+
+	if (ch_id == IQS626_CH_ULP_0)
+		return 0;
+
+	*(engine + 2) &= ~IQS626_CHx_ENG_2_LOCAL_CAP_ENABLE;
+	if (!fwnode_property_read_u32(ch_node, "azoteq,local-cap-size",
+				      &val) && val) {
+		unsigned int orig_val = val--;
+
+		if (val > IQS626_CHx_ENG_2_LOCAL_CAP_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel local cap. size: %u\n",
+				fwnode_get_name(ch_node), orig_val);
+			return -EINVAL;
+		}
+
+		*(engine + 2) &= ~IQS626_CHx_ENG_2_LOCAL_CAP_MASK;
+		*(engine + 2) |= (val << IQS626_CHx_ENG_2_LOCAL_CAP_SHIFT);
+
+		*(engine + 2) |= IQS626_CHx_ENG_2_LOCAL_CAP_ENABLE;
+	}
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,sense-mode", &val)) {
+		if (val > IQS626_CHx_ENG_2_SENSE_MODE_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel sensing mode: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		*(engine + 2) &= ~IQS626_CHx_ENG_2_SENSE_MODE_MASK;
+		*(engine + 2) |= val;
+	}
+
+	if (!fwnode_property_read_u32(ch_node, "azoteq,tx-freq", &val)) {
+		if (val > IQS626_CHx_ENG_3_TX_FREQ_MAX) {
+			dev_err(&client->dev,
+				"Invalid %s channel excitation frequency: %u\n",
+				fwnode_get_name(ch_node), val);
+			return -EINVAL;
+		}
+
+		*(engine + 3) &= ~IQS626_CHx_ENG_3_TX_FREQ_MASK;
+		*(engine + 3) |= (val << IQS626_CHx_ENG_3_TX_FREQ_SHIFT);
+	}
+
+	*(engine + 3) &= ~IQS626_CHx_ENG_3_INV_LOGIC;
+	if (fwnode_property_present(ch_node, "azoteq,invert-enable"))
+		*(engine + 3) |= IQS626_CHx_ENG_3_INV_LOGIC;
+
+	*(engine + 4) &= ~IQS626_CHx_ENG_4_COMP_DISABLE;
+	if (fwnode_property_present(ch_node, "azoteq,comp-disable"))
+		*(engine + 4) |= IQS626_CHx_ENG_4_COMP_DISABLE;
+
+	*(engine + 4) &= ~IQS626_CHx_ENG_4_STATIC_ENABLE;
+	if (fwnode_property_present(ch_node, "azoteq,static-enable"))
+		*(engine + 4) |= IQS626_CHx_ENG_4_STATIC_ENABLE;
+
+	i = ch_id - IQS626_CH_GEN_0;
+	assoc_select = &sys_reg->ch_reg_gen[i].assoc_select;
+	assoc_weight = &sys_reg->ch_reg_gen[i].assoc_weight;
+
+	*assoc_select = 0;
+	if (!fwnode_property_present(ch_node, "azoteq,assoc-select"))
+		return 0;
+
+	for (i = 0; i < ARRAY_SIZE(iqs626_channels); i++) {
+		if (fwnode_property_match_string(ch_node, "azoteq,assoc-select",
+						 iqs626_channels[i].name) < 0)
+			continue;
+
+		*assoc_select |= iqs626_channels[i].active;
+	}
+
+	if (fwnode_property_read_u32(ch_node, "azoteq,assoc-weight", &val))
+		return 0;
+
+	if (val > IQS626_GEN_WEIGHT_MAX) {
+		dev_err(&client->dev,
+			"Invalid %s channel associated weight: %u\n",
+			fwnode_get_name(ch_node), val);
+		return -EINVAL;
+	}
+
+	*assoc_weight = val;
+
+	return 0;
+}
+
+static int iqs626_parse_prop(struct iqs626_private *iqs626)
+{
+	struct iqs626_sys_reg *sys_reg = &iqs626->sys_reg;
+	struct i2c_client *client = iqs626->client;
+	struct fwnode_handle *ch_node;
+	unsigned int val;
+	int error, i;
+	u16 general;
+
+	if (!device_property_read_u32(&client->dev, "azoteq,suspend-mode",
+				      &val)) {
+		if (val > IQS626_SYS_SETTINGS_PWR_MODE_MAX) {
+			dev_err(&client->dev, "Invalid suspend mode: %u\n",
+				val);
+			return -EINVAL;
+		}
+
+		iqs626->suspend_mode = val;
+	}
+
+	error = regmap_raw_read(iqs626->regmap, IQS626_SYS_SETTINGS, sys_reg,
+				sizeof(*sys_reg));
+	if (error)
+		return error;
+
+	general = be16_to_cpu(sys_reg->general);
+	general &= IQS626_SYS_SETTINGS_ULP_UPDATE_MASK;
+
+	if (device_property_present(&client->dev, "azoteq,clk-div"))
+		general |= IQS626_SYS_SETTINGS_CLK_DIV;
+
+	if (device_property_present(&client->dev, "azoteq,ulp-enable"))
+		general |= IQS626_SYS_SETTINGS_ULP_AUTO;
+
+	if (!device_property_read_u32(&client->dev, "azoteq,ulp-update",
+				      &val)) {
+		if (val > IQS626_SYS_SETTINGS_ULP_UPDATE_MAX) {
+			dev_err(&client->dev, "Invalid update rate: %u\n", val);
+			return -EINVAL;
+		}
+
+		general &= ~IQS626_SYS_SETTINGS_ULP_UPDATE_MASK;
+		general |= (val << IQS626_SYS_SETTINGS_ULP_UPDATE_SHIFT);
+	}
+
+	sys_reg->misc_a &= ~IQS626_MISC_A_ATI_BAND_DISABLE;
+	if (device_property_present(&client->dev, "azoteq,ati-band-disable"))
+		sys_reg->misc_a |= IQS626_MISC_A_ATI_BAND_DISABLE;
+
+	sys_reg->misc_a &= ~IQS626_MISC_A_ATI_LP_ONLY;
+	if (device_property_present(&client->dev, "azoteq,ati-lp-only"))
+		sys_reg->misc_a |= IQS626_MISC_A_ATI_LP_ONLY;
+
+	if (!device_property_read_u32(&client->dev, "azoteq,gpio3-select",
+				      &val)) {
+		if (val > IQS626_MISC_A_GPIO3_SELECT_MAX) {
+			dev_err(&client->dev, "Invalid GPIO3 selection: %u\n",
+				val);
+			return -EINVAL;
+		}
+
+		sys_reg->misc_a &= ~IQS626_MISC_A_GPIO3_SELECT_MASK;
+		sys_reg->misc_a |= val;
+	}
+
+	if (!device_property_read_u32(&client->dev, "azoteq,reseed-select",
+				      &val)) {
+		if (val > IQS626_MISC_B_RESEED_UI_SEL_MAX) {
+			dev_err(&client->dev, "Invalid reseed selection: %u\n",
+				val);
+			return -EINVAL;
+		}
+
+		sys_reg->misc_b &= ~IQS626_MISC_B_RESEED_UI_SEL_MASK;
+		sys_reg->misc_b |= (val << IQS626_MISC_B_RESEED_UI_SEL_SHIFT);
+	}
+
+	sys_reg->misc_b &= ~IQS626_MISC_B_THRESH_EXTEND;
+	if (device_property_present(&client->dev, "azoteq,thresh-extend"))
+		sys_reg->misc_b |= IQS626_MISC_B_THRESH_EXTEND;
+
+	sys_reg->misc_b &= ~IQS626_MISC_B_TRACKING_UI_ENABLE;
+	if (device_property_present(&client->dev, "azoteq,tracking-enable"))
+		sys_reg->misc_b |= IQS626_MISC_B_TRACKING_UI_ENABLE;
+
+	sys_reg->misc_b &= ~IQS626_MISC_B_RESEED_OFFSET;
+	if (device_property_present(&client->dev, "azoteq,reseed-offset"))
+		sys_reg->misc_b |= IQS626_MISC_B_RESEED_OFFSET;
+
+	if (!device_property_read_u32(&client->dev, "azoteq,rate-np-ms",
+				      &val)) {
+		if (val > IQS626_RATE_NP_MS_MAX) {
+			dev_err(&client->dev, "Invalid report rate: %u\n", val);
+			return -EINVAL;
+		}
+
+		sys_reg->rate_np = val;
+	}
+
+	if (!device_property_read_u32(&client->dev, "azoteq,rate-lp-ms",
+				      &val)) {
+		if (val > IQS626_RATE_LP_MS_MAX) {
+			dev_err(&client->dev, "Invalid report rate: %u\n", val);
+			return -EINVAL;
+		}
+
+		sys_reg->rate_lp = val;
+	}
+
+	if (!device_property_read_u32(&client->dev, "azoteq,rate-ulp-ms",
+				      &val)) {
+		if (val > IQS626_RATE_ULP_MS_MAX) {
+			dev_err(&client->dev, "Invalid report rate: %u\n", val);
+			return -EINVAL;
+		}
+
+		sys_reg->rate_ulp = val / 16;
+	}
+
+	if (!device_property_read_u32(&client->dev, "azoteq,timeout-pwr-ms",
+				      &val)) {
+		if (val > IQS626_TIMEOUT_PWR_MS_MAX) {
+			dev_err(&client->dev, "Invalid timeout: %u\n", val);
+			return -EINVAL;
+		}
+
+		sys_reg->timeout_pwr = val / 512;
+	}
+
+	if (!device_property_read_u32(&client->dev, "azoteq,timeout-lta-ms",
+				      &val)) {
+		if (val > IQS626_TIMEOUT_LTA_MS_MAX) {
+			dev_err(&client->dev, "Invalid timeout: %u\n", val);
+			return -EINVAL;
+		}
+
+		sys_reg->timeout_lta = val / 512;
+	}
+
+	sys_reg->event_mask = ~((u8)IQS626_EVENT_MASK_SYS);
+	sys_reg->redo_ati = 0;
+
+	sys_reg->reseed = 0;
+	sys_reg->active = 0;
+
+	for (i = 0; i < ARRAY_SIZE(iqs626_channels); i++) {
+		ch_node = device_get_named_child_node(&client->dev,
+						      iqs626_channels[i].name);
+		if (!ch_node)
+			continue;
+
+		error = iqs626_parse_channel(iqs626, ch_node, i);
+		if (error)
+			return error;
+
+		error = iqs626_parse_ati_target(iqs626, ch_node, i);
+		if (error)
+			return error;
+
+		error = iqs626_parse_events(iqs626, ch_node, i);
+		if (error)
+			return error;
+
+		if (!fwnode_property_present(ch_node, "azoteq,ati-exclude"))
+			sys_reg->redo_ati |= iqs626_channels[i].active;
+
+		if (!fwnode_property_present(ch_node, "azoteq,reseed-disable"))
+			sys_reg->reseed |= iqs626_channels[i].active;
+
+		sys_reg->active |= iqs626_channels[i].active;
+	}
+
+	general |= IQS626_SYS_SETTINGS_EVENT_MODE;
+
+	/*
+	 * Enable streaming during normal-power mode if the trackpad is used to
+	 * report raw coordinates instead of gestures. In that case, the device
+	 * returns to event mode during low-power mode.
+	 */
+	if (sys_reg->active & iqs626_channels[IQS626_CH_TP_2].active &&
+	    sys_reg->event_mask & IQS626_EVENT_MASK_GESTURE)
+		general |= IQS626_SYS_SETTINGS_EVENT_MODE_LP;
+
+	general |= IQS626_SYS_SETTINGS_REDO_ATI;
+	general |= IQS626_SYS_SETTINGS_ACK_RESET;
+
+	sys_reg->general = cpu_to_be16(general);
+
+	error = regmap_raw_write(iqs626->regmap, IQS626_SYS_SETTINGS,
+				 &iqs626->sys_reg, sizeof(iqs626->sys_reg));
+	if (error)
+		return error;
+
+	iqs626_irq_wait();
+
+	return 0;
+}
+
+static int iqs626_input_init(struct iqs626_private *iqs626)
+{
+	struct iqs626_sys_reg *sys_reg = &iqs626->sys_reg;
+	struct i2c_client *client = iqs626->client;
+	int error, i, j;
+
+	iqs626->keypad = devm_input_allocate_device(&client->dev);
+	if (!iqs626->keypad)
+		return -ENOMEM;
+
+	iqs626->keypad->keycodemax = ARRAY_SIZE(iqs626->kp_code);
+	iqs626->keypad->keycode = iqs626->kp_code;
+	iqs626->keypad->keycodesize = sizeof(**iqs626->kp_code);
+
+	iqs626->keypad->name = "iqs626a_keypad";
+	iqs626->keypad->id.bustype = BUS_I2C;
+
+	for (i = 0; i < ARRAY_SIZE(iqs626_channels); i++) {
+		if (!(sys_reg->active & iqs626_channels[i].active))
+			continue;
+
+		for (j = 0; j < ARRAY_SIZE(iqs626_events); j++) {
+			if (!iqs626->kp_type[i][j])
+				continue;
+
+			input_set_capability(iqs626->keypad,
+					     iqs626->kp_type[i][j],
+					     iqs626->kp_code[i][j]);
+		}
+	}
+
+	if (!(sys_reg->active & iqs626_channels[IQS626_CH_TP_2].active))
+		return 0;
+
+	iqs626->trackpad = devm_input_allocate_device(&client->dev);
+	if (!iqs626->trackpad)
+		return -ENOMEM;
+
+	iqs626->trackpad->keycodemax = ARRAY_SIZE(iqs626->tp_code);
+	iqs626->trackpad->keycode = iqs626->tp_code;
+	iqs626->trackpad->keycodesize = sizeof(*iqs626->tp_code);
+
+	iqs626->trackpad->name = "iqs626a_trackpad";
+	iqs626->trackpad->id.bustype = BUS_I2C;
+
+	/*
+	 * Present the trackpad as a traditional pointing device if no gestures
+	 * have been mapped to a keycode.
+	 */
+	if (sys_reg->event_mask & IQS626_EVENT_MASK_GESTURE) {
+		u8 tp_mask = iqs626_channels[IQS626_CH_TP_3].active;
+
+		input_set_capability(iqs626->trackpad, EV_KEY, BTN_TOUCH);
+		input_set_abs_params(iqs626->trackpad, ABS_Y, 0, 255, 0, 0);
+
+		if ((sys_reg->active & tp_mask) == tp_mask)
+			input_set_abs_params(iqs626->trackpad,
+					     ABS_X, 0, 255, 0, 0);
+		else
+			input_set_abs_params(iqs626->trackpad,
+					     ABS_X, 0, 128, 0, 0);
+
+		touchscreen_parse_properties(iqs626->trackpad, false,
+					     &iqs626->prop);
+	} else {
+		for (i = 0; i < IQS626_NUM_GESTURES; i++)
+			if (iqs626->tp_code[i] != KEY_RESERVED)
+				input_set_capability(iqs626->trackpad, EV_KEY,
+						     iqs626->tp_code[i]);
+	}
+
+	error = input_register_device(iqs626->trackpad);
+	if (error)
+		dev_err(&client->dev, "Failed to register trackpad: %d\n",
+			error);
+
+	return error;
+}
+
+static int iqs626_report(struct iqs626_private *iqs626)
+{
+	struct iqs626_sys_reg *sys_reg = &iqs626->sys_reg;
+	struct i2c_client *client = iqs626->client;
+	struct iqs626_flags flags;
+	__le16 hall_output;
+	int error, i, j;
+	u8 state;
+	u8 *dir_mask = &flags.states[IQS626_ST_OFFS_DIR];
+
+	error = regmap_raw_read(iqs626->regmap, IQS626_SYS_FLAGS, &flags,
+				sizeof(flags));
+	if (error) {
+		dev_err(&client->dev, "Failed to read device status: %d\n",
+			error);
+		return error;
+	}
+
+	/*
+	 * The device resets itself if its own watchdog bites, which can happen
+	 * in the event of an I2C communication error. In this case, the device
+	 * asserts a SHOW_RESET interrupt and all registers must be restored.
+	 */
+	if (be16_to_cpu(flags.system) & IQS626_SYS_FLAGS_SHOW_RESET) {
+		dev_err(&client->dev, "Unexpected device reset\n");
+
+		error = regmap_raw_write(iqs626->regmap, IQS626_SYS_SETTINGS,
+					 sys_reg, sizeof(*sys_reg));
+		if (error)
+			dev_err(&client->dev,
+				"Failed to re-initialize device: %d\n", error);
+
+		return error;
+	}
+
+	if (be16_to_cpu(flags.system) & IQS626_SYS_FLAGS_IN_ATI)
+		return 0;
+
+	/*
+	 * Unlike the ULP or generic channels, the Hall channel does not have a
+	 * direction flag. Instead, the direction (i.e. magnet polarity) can be
+	 * derived based on the sign of the 2's complement differential output.
+	 */
+	if (sys_reg->active & iqs626_channels[IQS626_CH_HALL].active) {
+		error = regmap_raw_read(iqs626->regmap, IQS626_HALL_OUTPUT,
+					&hall_output, sizeof(hall_output));
+		if (error) {
+			dev_err(&client->dev,
+				"Failed to read Hall output: %d\n", error);
+			return error;
+		}
+
+		*dir_mask &= ~iqs626_channels[IQS626_CH_HALL].active;
+		if (le16_to_cpu(hall_output) < 0x8000)
+			*dir_mask |= iqs626_channels[IQS626_CH_HALL].active;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(iqs626_channels); i++) {
+		if (!(sys_reg->active & iqs626_channels[i].active))
+			continue;
+
+		for (j = 0; j < ARRAY_SIZE(iqs626_events); j++) {
+			if (!iqs626->kp_type[i][j])
+				continue;
+
+			state = flags.states[iqs626_events[j].st_offs];
+			state &= iqs626_events[j].dir_up ? *dir_mask
+							 : ~(*dir_mask);
+			state &= iqs626_channels[i].active;
+
+			input_event(iqs626->keypad, iqs626->kp_type[i][j],
+				    iqs626->kp_code[i][j], !!state);
+		}
+	}
+
+	input_sync(iqs626->keypad);
+
+	/*
+	 * The following completion signals that ATI has finished, any initial
+	 * switch states have been reported and the keypad can be registered.
+	 */
+	complete_all(&iqs626->ati_done);
+
+	if (!(sys_reg->active & iqs626_channels[IQS626_CH_TP_2].active))
+		return 0;
+
+	if (sys_reg->event_mask & IQS626_EVENT_MASK_GESTURE) {
+		state = flags.states[IQS626_ST_OFFS_TOUCH];
+		state &= iqs626_channels[IQS626_CH_TP_2].active;
+
+		input_report_key(iqs626->trackpad, BTN_TOUCH, state);
+
+		if (state)
+			touchscreen_report_pos(iqs626->trackpad, &iqs626->prop,
+					       flags.trackpad_x,
+					       flags.trackpad_y, false);
+	} else {
+		for (i = 0; i < IQS626_NUM_GESTURES; i++)
+			input_report_key(iqs626->trackpad, iqs626->tp_code[i],
+					 flags.gesture & BIT(i));
+
+		if (flags.gesture & GENMASK(IQS626_GESTURE_TAP, 0)) {
+			input_sync(iqs626->trackpad);
+
+			/*
+			 * Momentary gestures are followed by a complementary
+			 * release cycle so as to emulate a full keystroke.
+			 */
+			for (i = 0; i < IQS626_GESTURE_HOLD; i++)
+				input_report_key(iqs626->trackpad,
+						 iqs626->tp_code[i], 0);
+		}
+	}
+
+	input_sync(iqs626->trackpad);
+
+	return 0;
+}
+
+static irqreturn_t iqs626_irq(int irq, void *context)
+{
+	struct iqs626_private *iqs626 = context;
+
+	if (iqs626_report(iqs626))
+		return IRQ_NONE;
+
+	/*
+	 * The device does not deassert its interrupt (RDY) pin until shortly
+	 * after receiving an I2C stop condition; the following delay ensures
+	 * the interrupt handler does not return before this time.
+	 */
+	iqs626_irq_wait();
+
+	return IRQ_HANDLED;
+}
+
+static const struct regmap_config iqs626_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 16,
+	.max_register = IQS626_MAX_REG,
+};
+
+static int iqs626_probe(struct i2c_client *client)
+{
+	struct iqs626_ver_info ver_info;
+	struct iqs626_private *iqs626;
+	int error;
+
+	iqs626 = devm_kzalloc(&client->dev, sizeof(*iqs626), GFP_KERNEL);
+	if (!iqs626)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, iqs626);
+	iqs626->client = client;
+
+	iqs626->regmap = devm_regmap_init_i2c(client, &iqs626_regmap_config);
+	if (IS_ERR(iqs626->regmap)) {
+		error = PTR_ERR(iqs626->regmap);
+		dev_err(&client->dev, "Failed to initialize register map: %d\n",
+			error);
+		return error;
+	}
+
+	init_completion(&iqs626->ati_done);
+
+	error = regmap_raw_read(iqs626->regmap, IQS626_VER_INFO, &ver_info,
+				sizeof(ver_info));
+	if (error)
+		return error;
+
+	if (ver_info.prod_num != IQS626_VER_INFO_PROD_NUM) {
+		dev_err(&client->dev, "Unrecognized product number: 0x%02X\n",
+			ver_info.prod_num);
+		return -EINVAL;
+	}
+
+	error = iqs626_parse_prop(iqs626);
+	if (error)
+		return error;
+
+	error = iqs626_input_init(iqs626);
+	if (error)
+		return error;
+
+	error = devm_request_threaded_irq(&client->dev, client->irq,
+					  NULL, iqs626_irq, IRQF_ONESHOT,
+					  client->name, iqs626);
+	if (error) {
+		dev_err(&client->dev, "Failed to request IRQ: %d\n", error);
+		return error;
+	}
+
+	if (!wait_for_completion_timeout(&iqs626->ati_done,
+					 msecs_to_jiffies(2000))) {
+		dev_err(&client->dev, "Failed to complete ATI\n");
+		return -ETIMEDOUT;
+	}
+
+	/*
+	 * The keypad may include one or more switches and is not registered
+	 * until ATI is complete and the initial switch states are read.
+	 */
+	error = input_register_device(iqs626->keypad);
+	if (error)
+		dev_err(&client->dev, "Failed to register keypad: %d\n", error);
+
+	return error;
+}
+
+static int __maybe_unused iqs626_suspend(struct device *dev)
+{
+	struct iqs626_private *iqs626 = dev_get_drvdata(dev);
+	struct i2c_client *client = iqs626->client;
+	unsigned int val;
+	int error;
+
+	if (!iqs626->suspend_mode)
+		return 0;
+
+	disable_irq(client->irq);
+
+	/*
+	 * Automatic power mode switching must be disabled before the device is
+	 * forced into any particular power mode. In this case, the device will
+	 * transition into normal-power mode.
+	 */
+	error = regmap_update_bits(iqs626->regmap, IQS626_SYS_SETTINGS,
+				   IQS626_SYS_SETTINGS_DIS_AUTO, ~0);
+	if (error)
+		goto err_irq;
+
+	/*
+	 * The following check ensures the device has completed its transition
+	 * into normal-power mode before a manual mode switch is performed.
+	 */
+	error = regmap_read_poll_timeout(iqs626->regmap, IQS626_SYS_FLAGS, val,
+					!(val & IQS626_SYS_FLAGS_PWR_MODE_MASK),
+					 IQS626_PWR_MODE_POLL_SLEEP_US,
+					 IQS626_PWR_MODE_POLL_TIMEOUT_US);
+	if (error)
+		goto err_irq;
+
+	error = regmap_update_bits(iqs626->regmap, IQS626_SYS_SETTINGS,
+				   IQS626_SYS_SETTINGS_PWR_MODE_MASK,
+				   iqs626->suspend_mode <<
+				   IQS626_SYS_SETTINGS_PWR_MODE_SHIFT);
+	if (error)
+		goto err_irq;
+
+	/*
+	 * This last check ensures the device has completed its transition into
+	 * the desired power mode to prevent any spurious interrupts from being
+	 * triggered after iqs626_suspend has already returned.
+	 */
+	error = regmap_read_poll_timeout(iqs626->regmap, IQS626_SYS_FLAGS, val,
+					 (val & IQS626_SYS_FLAGS_PWR_MODE_MASK)
+					 == (iqs626->suspend_mode <<
+					     IQS626_SYS_FLAGS_PWR_MODE_SHIFT),
+					 IQS626_PWR_MODE_POLL_SLEEP_US,
+					 IQS626_PWR_MODE_POLL_TIMEOUT_US);
+
+err_irq:
+	iqs626_irq_wait();
+	enable_irq(client->irq);
+
+	return error;
+}
+
+static int __maybe_unused iqs626_resume(struct device *dev)
+{
+	struct iqs626_private *iqs626 = dev_get_drvdata(dev);
+	struct i2c_client *client = iqs626->client;
+	unsigned int val;
+	int error;
+
+	if (!iqs626->suspend_mode)
+		return 0;
+
+	disable_irq(client->irq);
+
+	error = regmap_update_bits(iqs626->regmap, IQS626_SYS_SETTINGS,
+				   IQS626_SYS_SETTINGS_PWR_MODE_MASK, 0);
+	if (error)
+		goto err_irq;
+
+	/*
+	 * This check ensures the device has returned to normal-power mode
+	 * before automatic power mode switching is re-enabled.
+	 */
+	error = regmap_read_poll_timeout(iqs626->regmap, IQS626_SYS_FLAGS, val,
+					!(val & IQS626_SYS_FLAGS_PWR_MODE_MASK),
+					 IQS626_PWR_MODE_POLL_SLEEP_US,
+					 IQS626_PWR_MODE_POLL_TIMEOUT_US);
+	if (error)
+		goto err_irq;
+
+	error = regmap_update_bits(iqs626->regmap, IQS626_SYS_SETTINGS,
+				   IQS626_SYS_SETTINGS_DIS_AUTO, 0);
+	if (error)
+		goto err_irq;
+
+	/*
+	 * This step reports any events that may have been "swallowed" as a
+	 * result of polling PWR_MODE (which automatically acknowledges any
+	 * pending interrupts).
+	 */
+	error = iqs626_report(iqs626);
+
+err_irq:
+	iqs626_irq_wait();
+	enable_irq(client->irq);
+
+	return error;
+}
+
+static SIMPLE_DEV_PM_OPS(iqs626_pm, iqs626_suspend, iqs626_resume);
+
+static const struct of_device_id iqs626_of_match[] = {
+	{ .compatible = "azoteq,iqs626a" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, iqs626_of_match);
+
+static struct i2c_driver iqs626_i2c_driver = {
+	.driver = {
+		.name = "iqs626a",
+		.of_match_table = iqs626_of_match,
+		.pm = &iqs626_pm,
+	},
+	.probe_new = iqs626_probe,
+};
+module_i2c_driver(iqs626_i2c_driver);
+
+MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>");
+MODULE_DESCRIPTION("Azoteq IQS626A Capacitive Touch Controller");
+MODULE_LICENSE("GPL");
-- 
cgit v1.2.3


From 9d41359caca7cdc6d3011ba4e485e89d40505e81 Mon Sep 17 00:00:00 2001
From: Jeff LaBundy <jeff@labundy.com>
Date: Mon, 22 Mar 2021 20:15:32 -0700
Subject: Input: iqs5xx - make reset GPIO optional

The device's hardware reset pin is only required if the platform
must be able to update the device's firmware.

As such, demote the reset GPIO to optional in support of devices
that ship with pre-programmed firmware and don't route the reset
pin back to the SoC.

In that case, the 'fw_file' attribute is hidden because there is
no way to open the bootloader. The logic is extended to the case
in which the device does not advertise bootloader support in the
first place.

Last but not least, remove the hardware reset performed at probe
because there is no reason to reset the device manually. A power
on reset function already ensures a clean reset at start-up.

Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Link: https://lore.kernel.org/r/20210323021006.367-1-jeff@labundy.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/iqs5xx.c | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/iqs5xx.c b/drivers/input/touchscreen/iqs5xx.c
index a990c176abf7..b3fa71213d60 100644
--- a/drivers/input/touchscreen/iqs5xx.c
+++ b/drivers/input/touchscreen/iqs5xx.c
@@ -835,9 +835,6 @@ static int iqs5xx_fw_file_write(struct i2c_client *client, const char *fw_file)
 	int error, error_init = 0;
 	u8 *pmap;
 
-	if (iqs5xx->dev_id_info.bl_status == IQS5XX_BL_STATUS_NONE)
-		return -EPERM;
-
 	pmap = kzalloc(IQS5XX_PMAP_LEN, GFP_KERNEL);
 	if (!pmap)
 		return -ENOMEM;
@@ -963,7 +960,22 @@ static struct attribute *iqs5xx_attrs[] = {
 	NULL,
 };
 
+static umode_t iqs5xx_attr_is_visible(struct kobject *kobj,
+				      struct attribute *attr, int i)
+{
+	struct device *dev = kobj_to_dev(kobj);
+	struct iqs5xx_private *iqs5xx = dev_get_drvdata(dev);
+
+	if (attr == &dev_attr_fw_file.attr &&
+	    (iqs5xx->dev_id_info.bl_status == IQS5XX_BL_STATUS_NONE ||
+	    !iqs5xx->reset_gpio))
+		return 0;
+
+	return attr->mode;
+}
+
 static const struct attribute_group iqs5xx_attr_group = {
+	.is_visible = iqs5xx_attr_is_visible,
 	.attrs = iqs5xx_attrs,
 };
 
@@ -1020,8 +1032,8 @@ static int iqs5xx_probe(struct i2c_client *client,
 	i2c_set_clientdata(client, iqs5xx);
 	iqs5xx->client = client;
 
-	iqs5xx->reset_gpio = devm_gpiod_get(&client->dev,
-					    "reset", GPIOD_OUT_LOW);
+	iqs5xx->reset_gpio = devm_gpiod_get_optional(&client->dev,
+						     "reset", GPIOD_OUT_LOW);
 	if (IS_ERR(iqs5xx->reset_gpio)) {
 		error = PTR_ERR(iqs5xx->reset_gpio);
 		dev_err(&client->dev, "Failed to request GPIO: %d\n", error);
@@ -1030,9 +1042,6 @@ static int iqs5xx_probe(struct i2c_client *client,
 
 	mutex_init(&iqs5xx->lock);
 
-	iqs5xx_reset(client);
-	usleep_range(10000, 10100);
-
 	error = iqs5xx_dev_init(client);
 	if (error)
 		return error;
-- 
cgit v1.2.3


From 84c36ab7a6ddeab213c979d22b6372f71d738862 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 22 Mar 2021 20:25:26 -0700
Subject: Input: cyttsp - verbose error on soft reset

The first thing the Cypress driver does when starting
up is to try a soft reset. This is the first point where
the driver SPI/I2C communication can fail, so put out some
nice debug text:

  cyttsp-spi spi2.0: failed to send soft reset

Instead of just:

  cyttsp-spi: probe of spi2.0 failed with error -5

This is more helpful.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210322221349.1116666-1-linus.walleij@linaro.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/cyttsp_core.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
index 73c854f35f33..e7b6b6c87515 100644
--- a/drivers/input/touchscreen/cyttsp_core.c
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -238,7 +238,6 @@ static void cyttsp_hard_reset(struct cyttsp *ts)
 
 static int cyttsp_soft_reset(struct cyttsp *ts)
 {
-	unsigned long timeout;
 	int retval;
 
 	/* wait for interrupt to set ready completion */
@@ -248,12 +247,16 @@ static int cyttsp_soft_reset(struct cyttsp *ts)
 	enable_irq(ts->irq);
 
 	retval = ttsp_send_command(ts, CY_SOFT_RESET_MODE);
-	if (retval)
+	if (retval) {
+		dev_err(ts->dev, "failed to send soft reset\n");
 		goto out;
+	}
 
-	timeout = wait_for_completion_timeout(&ts->bl_ready,
-			msecs_to_jiffies(CY_DELAY_DFLT * CY_DELAY_MAX));
-	retval = timeout ? 0 : -EIO;
+	if (!wait_for_completion_timeout(&ts->bl_ready,
+			msecs_to_jiffies(CY_DELAY_DFLT * CY_DELAY_MAX))) {
+		dev_err(ts->dev, "timeout waiting for soft reset\n");
+		retval = -EIO;
+	}
 
 out:
 	ts->state = CY_IDLE_STATE;
-- 
cgit v1.2.3


From 34a6ae672645a89f760960a11ce80125cc4d361f Mon Sep 17 00:00:00 2001
From: Pavel Machek <pavel@ucw.cz>
Date: Thu, 25 Mar 2021 11:39:29 +0100
Subject: leds: Kconfig: LEDS_CLASS is usually selected.

People should really say Y to the LEDS_CLASS prompt.

Signed-off-by: Pavel Machek <pavel@ucw.cz>
---
 drivers/leds/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 4ca8cd594518..49d99cb084db 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -18,7 +18,7 @@ config LEDS_CLASS
 	tristate "LED Class Support"
 	help
 	  This option enables the LED sysfs class in /sys/class/leds.  You'll
-	  need this to do anything useful with LEDs.  If unsure, say N.
+	  need this to do anything useful with LEDs.  If unsure, say Y.
 
 config LEDS_CLASS_FLASH
 	tristate "LED Flash Class Support"
-- 
cgit v1.2.3


From bcd9730a04a1f18d873adb3907f2b4830b88ee9a Mon Sep 17 00:00:00 2001
From: Barry Song <song.bao.hua@hisilicon.com>
Date: Thu, 25 Mar 2021 14:43:18 -0700
Subject: Input: move to use request_irq by IRQF_NO_AUTOEN flag

disable_irq() after request_irq() still has a time gap in which
interrupts can come. request_irq() with IRQF_NO_AUTOEN flag will
disable IRQ auto-enable because of requesting.

On the other hand, request_irq() after setting IRQ_NOAUTOEN as
below
irq_set_status_flags(irq, IRQ_NOAUTOEN);
request_irq(dev, irq...);
can also be replaced by request_irq() with IRQF_NO_AUTOEN flag.

Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>
Link: https://lore.kernel.org/r/20210302224916.13980-3-song.bao.hua@hisilicon.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/keyboard/tca6416-keypad.c  | 3 +--
 drivers/input/keyboard/tegra-kbc.c       | 5 ++---
 drivers/input/touchscreen/ar1021_i2c.c   | 5 +----
 drivers/input/touchscreen/atmel_mxt_ts.c | 5 ++---
 drivers/input/touchscreen/bu21029_ts.c   | 4 ++--
 drivers/input/touchscreen/cyttsp_core.c  | 5 ++---
 drivers/input/touchscreen/melfas_mip4.c  | 5 ++---
 drivers/input/touchscreen/mms114.c       | 4 ++--
 drivers/input/touchscreen/stmfts.c       | 3 +--
 drivers/input/touchscreen/wm831x-ts.c    | 3 +--
 drivers/input/touchscreen/zinitix.c      | 4 ++--
 11 files changed, 18 insertions(+), 28 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/keyboard/tca6416-keypad.c b/drivers/input/keyboard/tca6416-keypad.c
index 9b0f9665dcb0..2a9755910065 100644
--- a/drivers/input/keyboard/tca6416-keypad.c
+++ b/drivers/input/keyboard/tca6416-keypad.c
@@ -274,7 +274,7 @@ static int tca6416_keypad_probe(struct i2c_client *client,
 		error = request_threaded_irq(chip->irqnum, NULL,
 					     tca6416_keys_isr,
 					     IRQF_TRIGGER_FALLING |
-						IRQF_ONESHOT,
+					     IRQF_ONESHOT | IRQF_NO_AUTOEN,
 					     "tca6416-keypad", chip);
 		if (error) {
 			dev_dbg(&client->dev,
@@ -282,7 +282,6 @@ static int tca6416_keypad_probe(struct i2c_client *client,
 				chip->irqnum, error);
 			goto fail1;
 		}
-		disable_irq(chip->irqnum);
 	}
 
 	error = input_register_device(input);
diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c
index 9671842a082a..570fe18c0ce9 100644
--- a/drivers/input/keyboard/tegra-kbc.c
+++ b/drivers/input/keyboard/tegra-kbc.c
@@ -694,14 +694,13 @@ static int tegra_kbc_probe(struct platform_device *pdev)
 	input_set_drvdata(kbc->idev, kbc);
 
 	err = devm_request_irq(&pdev->dev, kbc->irq, tegra_kbc_isr,
-			       IRQF_TRIGGER_HIGH, pdev->name, kbc);
+			       IRQF_TRIGGER_HIGH | IRQF_NO_AUTOEN,
+			       pdev->name, kbc);
 	if (err) {
 		dev_err(&pdev->dev, "failed to request keyboard IRQ\n");
 		return err;
 	}
 
-	disable_irq(kbc->irq);
-
 	err = input_register_device(kbc->idev);
 	if (err) {
 		dev_err(&pdev->dev, "failed to register input device\n");
diff --git a/drivers/input/touchscreen/ar1021_i2c.c b/drivers/input/touchscreen/ar1021_i2c.c
index c0d5c2413356..dc6a85362a40 100644
--- a/drivers/input/touchscreen/ar1021_i2c.c
+++ b/drivers/input/touchscreen/ar1021_i2c.c
@@ -125,7 +125,7 @@ static int ar1021_i2c_probe(struct i2c_client *client,
 
 	error = devm_request_threaded_irq(&client->dev, client->irq,
 					  NULL, ar1021_i2c_irq,
-					  IRQF_ONESHOT,
+					  IRQF_ONESHOT | IRQF_NO_AUTOEN,
 					  "ar1021_i2c", ar1021);
 	if (error) {
 		dev_err(&client->dev,
@@ -133,9 +133,6 @@ static int ar1021_i2c_probe(struct i2c_client *client,
 		return error;
 	}
 
-	/* Disable the IRQ, we'll enable it in ar1021_i2c_open() */
-	disable_irq(client->irq);
-
 	error = input_register_device(ar1021->input);
 	if (error) {
 		dev_err(&client->dev,
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 5ed23689047b..05de92c0293b 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -3215,15 +3215,14 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
 	}
 
 	error = devm_request_threaded_irq(&client->dev, client->irq,
-					  NULL, mxt_interrupt, IRQF_ONESHOT,
+					  NULL, mxt_interrupt,
+					  IRQF_ONESHOT | IRQF_NO_AUTOEN,
 					  client->name, data);
 	if (error) {
 		dev_err(&client->dev, "Failed to register interrupt\n");
 		return error;
 	}
 
-	disable_irq(client->irq);
-
 	error = regulator_bulk_enable(ARRAY_SIZE(data->regulators),
 				      data->regulators);
 	if (error) {
diff --git a/drivers/input/touchscreen/bu21029_ts.c b/drivers/input/touchscreen/bu21029_ts.c
index 341925edb8e6..392950aa7856 100644
--- a/drivers/input/touchscreen/bu21029_ts.c
+++ b/drivers/input/touchscreen/bu21029_ts.c
@@ -401,10 +401,10 @@ static int bu21029_probe(struct i2c_client *client,
 
 	input_set_drvdata(in_dev, bu21029);
 
-	irq_set_status_flags(client->irq, IRQ_NOAUTOEN);
 	error = devm_request_threaded_irq(&client->dev, client->irq,
 					  NULL, bu21029_touch_soft_irq,
-					  IRQF_ONESHOT, DRIVER_NAME, bu21029);
+					  IRQF_ONESHOT | IRQF_NO_AUTOEN,
+					  DRIVER_NAME, bu21029);
 	if (error) {
 		dev_err(&client->dev,
 			"unable to request touch irq: %d\n", error);
diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
index e7b6b6c87515..c59aa6b8d257 100644
--- a/drivers/input/touchscreen/cyttsp_core.c
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -655,7 +655,8 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
 	}
 
 	error = devm_request_threaded_irq(dev, ts->irq, NULL, cyttsp_irq,
-					  IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+					  IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
+					  IRQF_NO_AUTOEN,
 					  "cyttsp", ts);
 	if (error) {
 		dev_err(ts->dev, "failed to request IRQ %d, err: %d\n",
@@ -663,8 +664,6 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
 		return ERR_PTR(error);
 	}
 
-	disable_irq(ts->irq);
-
 	cyttsp_hard_reset(ts);
 
 	error = cyttsp_power_on(ts);
diff --git a/drivers/input/touchscreen/melfas_mip4.c b/drivers/input/touchscreen/melfas_mip4.c
index 225796a3f546..2745bf1aee38 100644
--- a/drivers/input/touchscreen/melfas_mip4.c
+++ b/drivers/input/touchscreen/melfas_mip4.c
@@ -1502,7 +1502,8 @@ static int mip4_probe(struct i2c_client *client, const struct i2c_device_id *id)
 
 	error = devm_request_threaded_irq(&client->dev, client->irq,
 					  NULL, mip4_interrupt,
-					  IRQF_ONESHOT, MIP4_DEVICE_NAME, ts);
+					  IRQF_ONESHOT | IRQF_NO_AUTOEN,
+					  MIP4_DEVICE_NAME, ts);
 	if (error) {
 		dev_err(&client->dev,
 			"Failed to request interrupt %d: %d\n",
@@ -1510,8 +1511,6 @@ static int mip4_probe(struct i2c_client *client, const struct i2c_device_id *id)
 		return error;
 	}
 
-	disable_irq(client->irq);
-
 	error = input_register_device(input);
 	if (error) {
 		dev_err(&client->dev,
diff --git a/drivers/input/touchscreen/mms114.c b/drivers/input/touchscreen/mms114.c
index 16557f51b09d..7043f57ea2dd 100644
--- a/drivers/input/touchscreen/mms114.c
+++ b/drivers/input/touchscreen/mms114.c
@@ -530,13 +530,13 @@ static int mms114_probe(struct i2c_client *client,
 	}
 
 	error = devm_request_threaded_irq(&client->dev, client->irq,
-					  NULL, mms114_interrupt, IRQF_ONESHOT,
+					  NULL, mms114_interrupt,
+					  IRQF_ONESHOT | IRQF_NO_AUTOEN,
 					  dev_name(&client->dev), data);
 	if (error) {
 		dev_err(&client->dev, "Failed to register interrupt\n");
 		return error;
 	}
-	disable_irq(client->irq);
 
 	error = input_register_device(data->input_dev);
 	if (error) {
diff --git a/drivers/input/touchscreen/stmfts.c b/drivers/input/touchscreen/stmfts.c
index 9a64e1dbc04a..bc11203c9cf7 100644
--- a/drivers/input/touchscreen/stmfts.c
+++ b/drivers/input/touchscreen/stmfts.c
@@ -691,10 +691,9 @@ static int stmfts_probe(struct i2c_client *client,
 	 * interrupts. To be on the safe side it's better to not enable
 	 * the interrupts during their request.
 	 */
-	irq_set_status_flags(client->irq, IRQ_NOAUTOEN);
 	err = devm_request_threaded_irq(&client->dev, client->irq,
 					NULL, stmfts_irq_handler,
-					IRQF_ONESHOT,
+					IRQF_ONESHOT | IRQF_NO_AUTOEN,
 					"stmfts_irq", sdata);
 	if (err)
 		return err;
diff --git a/drivers/input/touchscreen/wm831x-ts.c b/drivers/input/touchscreen/wm831x-ts.c
index bb1699e0d3c7..319f57fb9af5 100644
--- a/drivers/input/touchscreen/wm831x-ts.c
+++ b/drivers/input/touchscreen/wm831x-ts.c
@@ -317,14 +317,13 @@ static int wm831x_ts_probe(struct platform_device *pdev)
 
 	error = request_threaded_irq(wm831x_ts->data_irq,
 				     NULL, wm831x_ts_data_irq,
-				     irqf | IRQF_ONESHOT,
+				     irqf | IRQF_ONESHOT | IRQF_NO_AUTOEN,
 				     "Touchscreen data", wm831x_ts);
 	if (error) {
 		dev_err(&pdev->dev, "Failed to request data IRQ %d: %d\n",
 			wm831x_ts->data_irq, error);
 		goto err_alloc;
 	}
-	disable_irq(wm831x_ts->data_irq);
 
 	if (pdata && pdata->pd_irqf)
 		irqf = pdata->pd_irqf;
diff --git a/drivers/input/touchscreen/zinitix.c b/drivers/input/touchscreen/zinitix.c
index 3b636beb583c..b8d901099378 100644
--- a/drivers/input/touchscreen/zinitix.c
+++ b/drivers/input/touchscreen/zinitix.c
@@ -513,10 +513,10 @@ static int zinitix_ts_probe(struct i2c_client *client)
 		return -EINVAL;
 	}
 
-	irq_set_status_flags(client->irq, IRQ_NOAUTOEN);
 	error = devm_request_threaded_irq(&client->dev, client->irq,
 					  NULL, zinitix_ts_irq_handler,
-					  IRQF_ONESHOT, client->name, bt541);
+					  IRQF_ONESHOT | IRQF_NO_AUTOEN,
+					  client->name, bt541);
 	if (error) {
 		dev_err(&client->dev, "Failed to request IRQ: %d\n", error);
 		return error;
-- 
cgit v1.2.3


From bfcf3d48dd02e95808a4693f2a49163f40fa5e74 Mon Sep 17 00:00:00 2001
From: Nikolai Kostrigin <nickel@altlinux.org>
Date: Tue, 23 Mar 2021 12:18:55 -0700
Subject: Input: elan_i2c - fix a typo in parameter name

s/max_baseliune/max_baseline/

Signed-off-by: Nikolai Kostrigin <nickel@altlinux.org>
Link: https://lore.kernel.org/r/20210311114146.1977616-1-nickel@altlinux.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/mouse/elan_i2c.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/input/mouse/elan_i2c.h b/drivers/input/mouse/elan_i2c.h
index 838b3b346316..dc4a240f4489 100644
--- a/drivers/input/mouse/elan_i2c.h
+++ b/drivers/input/mouse/elan_i2c.h
@@ -78,7 +78,7 @@ struct elan_transport_ops {
 	int (*calibrate_result)(struct i2c_client *client, u8 *val);
 
 	int (*get_baseline_data)(struct i2c_client *client,
-				 bool max_baseliune, u8 *value);
+				 bool max_baseline, u8 *value);
 
 	int (*get_version)(struct i2c_client *client, u8 pattern, bool iap,
 			   u8 *version);
-- 
cgit v1.2.3


From d9dfac5419d08e5f0048b53effd5b64de5801882 Mon Sep 17 00:00:00 2001
From: ChiYuan Huang <cy_huang@richtek.com>
Date: Fri, 26 Mar 2021 14:13:08 +0800
Subject: leds: rt4505: Add support for Richtek RT4505 flash LED controller

Add support for RT4505 flash LED controller. It can support up to 1.5A
flash current with hardware timeout and low input voltage protection.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
---
 drivers/leds/flash/Kconfig       |  11 +
 drivers/leds/flash/Makefile      |   1 +
 drivers/leds/flash/leds-rt4505.c | 430 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 442 insertions(+)
 create mode 100644 drivers/leds/flash/leds-rt4505.c

(limited to 'drivers')

diff --git a/drivers/leds/flash/Kconfig b/drivers/leds/flash/Kconfig
index b580b416b9a4..3f49f3edbffb 100644
--- a/drivers/leds/flash/Kconfig
+++ b/drivers/leds/flash/Kconfig
@@ -2,6 +2,17 @@
 
 if LEDS_CLASS_FLASH
 
+config LEDS_RT4505
+	tristate "LED support for RT4505 flashlight controller"
+	depends on I2C && OF
+	depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
+	select REGMAP_I2C
+	help
+	  This option enables support for the RT4505 flash LED controller.
+	  RT4505 includes torch and flash functions with programmable current.
+	  And it's commonly used to compensate the illuminance for the camera
+	  inside the mobile product like as phones or tablets.
+
 config LEDS_RT8515
 	tristate "LED support for Richtek RT8515 flash/torch LED"
 	depends on GPIOLIB
diff --git a/drivers/leds/flash/Makefile b/drivers/leds/flash/Makefile
index e990e257f4d7..09aee561f769 100644
--- a/drivers/leds/flash/Makefile
+++ b/drivers/leds/flash/Makefile
@@ -1,3 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
 
+obj-$(CONFIG_LEDS_RT4505)	+= leds-rt4505.o
 obj-$(CONFIG_LEDS_RT8515)	+= leds-rt8515.o
diff --git a/drivers/leds/flash/leds-rt4505.c b/drivers/leds/flash/leds-rt4505.c
new file mode 100644
index 000000000000..ee129ab7255d
--- /dev/null
+++ b/drivers/leds/flash/leds-rt4505.c
@@ -0,0 +1,430 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/bitops.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/led-class-flash.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <media/v4l2-flash-led-class.h>
+
+#define RT4505_REG_RESET	0x0
+#define RT4505_REG_CONFIG	0x8
+#define RT4505_REG_ILED		0x9
+#define RT4505_REG_ENABLE	0xA
+#define RT4505_REG_FLAGS	0xB
+
+#define RT4505_RESET_MASK	BIT(7)
+#define RT4505_FLASHTO_MASK	GENMASK(2, 0)
+#define RT4505_ITORCH_MASK	GENMASK(7, 5)
+#define RT4505_ITORCH_SHIFT	5
+#define RT4505_IFLASH_MASK	GENMASK(4, 0)
+#define RT4505_ENABLE_MASK	GENMASK(5, 0)
+#define RT4505_TORCH_SET	(BIT(0) | BIT(4))
+#define RT4505_FLASH_SET	(BIT(0) | BIT(1) | BIT(2) | BIT(4))
+#define RT4505_EXT_FLASH_SET	(BIT(0) | BIT(1) | BIT(4) | BIT(5))
+#define RT4505_FLASH_GET	(BIT(0) | BIT(1) | BIT(4))
+#define RT4505_OVP_MASK		BIT(3)
+#define RT4505_SHORT_MASK	BIT(2)
+#define RT4505_OTP_MASK		BIT(1)
+#define RT4505_TIMEOUT_MASK	BIT(0)
+
+#define RT4505_ITORCH_MINUA	46000
+#define RT4505_ITORCH_MAXUA	375000
+#define RT4505_ITORCH_STPUA	47000
+#define RT4505_IFLASH_MINUA	93750
+#define RT4505_IFLASH_MAXUA	1500000
+#define RT4505_IFLASH_STPUA	93750
+#define RT4505_FLASHTO_MINUS	100000
+#define RT4505_FLASHTO_MAXUS	800000
+#define RT4505_FLASHTO_STPUS	100000
+
+struct rt4505_priv {
+	struct device *dev;
+	struct regmap *regmap;
+	struct mutex lock;
+	struct led_classdev_flash flash;
+	struct v4l2_flash *v4l2_flash;
+};
+
+static int rt4505_torch_brightness_set(struct led_classdev *lcdev,
+				       enum led_brightness level)
+{
+	struct rt4505_priv *priv =
+		container_of(lcdev, struct rt4505_priv, flash.led_cdev);
+	u32 val = 0;
+	int ret;
+
+	mutex_lock(&priv->lock);
+
+	if (level != LED_OFF) {
+		ret = regmap_update_bits(priv->regmap,
+					 RT4505_REG_ILED, RT4505_ITORCH_MASK,
+					 (level - 1) << RT4505_ITORCH_SHIFT);
+		if (ret)
+			goto unlock;
+
+		val = RT4505_TORCH_SET;
+	}
+
+	ret = regmap_update_bits(priv->regmap, RT4505_REG_ENABLE,
+				 RT4505_ENABLE_MASK, val);
+
+unlock:
+	mutex_unlock(&priv->lock);
+	return ret;
+}
+
+static enum led_brightness rt4505_torch_brightness_get(
+						struct led_classdev *lcdev)
+{
+	struct rt4505_priv *priv =
+		container_of(lcdev, struct rt4505_priv, flash.led_cdev);
+	u32 val;
+	int ret;
+
+	mutex_lock(&priv->lock);
+
+	ret = regmap_read(priv->regmap, RT4505_REG_ENABLE, &val);
+	if (ret) {
+		dev_err(lcdev->dev, "Failed to get LED enable\n");
+		ret = LED_OFF;
+		goto unlock;
+	}
+
+	if ((val & RT4505_ENABLE_MASK) != RT4505_TORCH_SET) {
+		ret = LED_OFF;
+		goto unlock;
+	}
+
+	ret = regmap_read(priv->regmap, RT4505_REG_ILED, &val);
+	if (ret) {
+		dev_err(lcdev->dev, "Failed to get LED brightness\n");
+		ret = LED_OFF;
+		goto unlock;
+	}
+
+	ret = ((val & RT4505_ITORCH_MASK) >> RT4505_ITORCH_SHIFT) + 1;
+
+unlock:
+	mutex_unlock(&priv->lock);
+	return ret;
+}
+
+static int rt4505_flash_brightness_set(struct led_classdev_flash *fled_cdev,
+				       u32 brightness)
+{
+	struct rt4505_priv *priv =
+		container_of(fled_cdev, struct rt4505_priv, flash);
+	struct led_flash_setting *s = &fled_cdev->brightness;
+	u32 val = (brightness - s->min) / s->step;
+	int ret;
+
+	mutex_lock(&priv->lock);
+	ret = regmap_update_bits(priv->regmap, RT4505_REG_ILED,
+				 RT4505_IFLASH_MASK, val);
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static int rt4505_flash_strobe_set(struct led_classdev_flash *fled_cdev,
+				   bool state)
+{
+	struct rt4505_priv *priv =
+		container_of(fled_cdev, struct rt4505_priv, flash);
+	u32 val = state ? RT4505_FLASH_SET : 0;
+	int ret;
+
+	mutex_lock(&priv->lock);
+	ret = regmap_update_bits(priv->regmap, RT4505_REG_ENABLE,
+				 RT4505_ENABLE_MASK, val);
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static int rt4505_flash_strobe_get(struct led_classdev_flash *fled_cdev,
+				   bool *state)
+{
+	struct rt4505_priv *priv =
+		container_of(fled_cdev, struct rt4505_priv, flash);
+	u32 val;
+	int ret;
+
+	mutex_lock(&priv->lock);
+
+	ret = regmap_read(priv->regmap, RT4505_REG_ENABLE, &val);
+	if (ret)
+		goto unlock;
+
+	*state = (val & RT4505_FLASH_GET) == RT4505_FLASH_GET;
+
+unlock:
+	mutex_unlock(&priv->lock);
+	return ret;
+}
+
+static int rt4505_flash_timeout_set(struct led_classdev_flash *fled_cdev,
+				    u32 timeout)
+{
+	struct rt4505_priv *priv =
+		container_of(fled_cdev, struct rt4505_priv, flash);
+	struct led_flash_setting *s = &fled_cdev->timeout;
+	u32 val = (timeout - s->min) / s->step;
+	int ret;
+
+	mutex_lock(&priv->lock);
+	ret = regmap_update_bits(priv->regmap, RT4505_REG_CONFIG,
+				 RT4505_FLASHTO_MASK, val);
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static int rt4505_fault_get(struct led_classdev_flash *fled_cdev, u32 *fault)
+{
+	struct rt4505_priv *priv =
+		container_of(fled_cdev, struct rt4505_priv, flash);
+	u32 val, led_faults = 0;
+	int ret;
+
+	ret = regmap_read(priv->regmap, RT4505_REG_FLAGS, &val);
+	if (ret)
+		return ret;
+
+	if (val & RT4505_OVP_MASK)
+		led_faults |= LED_FAULT_OVER_VOLTAGE;
+
+	if (val & RT4505_SHORT_MASK)
+		led_faults |= LED_FAULT_SHORT_CIRCUIT;
+
+	if (val & RT4505_OTP_MASK)
+		led_faults |= LED_FAULT_OVER_TEMPERATURE;
+
+	if (val & RT4505_TIMEOUT_MASK)
+		led_faults |= LED_FAULT_TIMEOUT;
+
+	*fault = led_faults;
+	return 0;
+}
+
+static const struct led_flash_ops rt4505_flash_ops = {
+	.flash_brightness_set = rt4505_flash_brightness_set,
+	.strobe_set = rt4505_flash_strobe_set,
+	.strobe_get = rt4505_flash_strobe_get,
+	.timeout_set = rt4505_flash_timeout_set,
+	.fault_get = rt4505_fault_get,
+};
+
+static bool rt4505_is_accessible_reg(struct device *dev, unsigned int reg)
+{
+	if (reg == RT4505_REG_RESET ||
+		(reg >= RT4505_REG_CONFIG && reg <= RT4505_REG_FLAGS))
+		return true;
+	return false;
+}
+
+static const struct regmap_config rt4505_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = RT4505_REG_FLAGS,
+
+	.readable_reg = rt4505_is_accessible_reg,
+	.writeable_reg = rt4505_is_accessible_reg,
+};
+
+#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
+static int rt4505_flash_external_strobe_set(struct v4l2_flash *v4l2_flash,
+					    bool enable)
+{
+	struct led_classdev_flash *flash = v4l2_flash->fled_cdev;
+	struct rt4505_priv *priv =
+		container_of(flash, struct rt4505_priv, flash);
+	u32 val = enable ? RT4505_EXT_FLASH_SET : 0;
+	int ret;
+
+	mutex_lock(&priv->lock);
+	ret = regmap_update_bits(priv->regmap, RT4505_REG_ENABLE,
+				 RT4505_ENABLE_MASK, val);
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static const struct v4l2_flash_ops v4l2_flash_ops = {
+	.external_strobe_set = rt4505_flash_external_strobe_set,
+};
+
+static void rt4505_init_v4l2_config(struct rt4505_priv *priv,
+				    struct v4l2_flash_config *config)
+{
+	struct led_classdev_flash *flash = &priv->flash;
+	struct led_classdev *lcdev = &flash->led_cdev;
+	struct led_flash_setting *s;
+
+	strscpy(config->dev_name, lcdev->dev->kobj.name,
+		sizeof(config->dev_name));
+
+	s = &config->intensity;
+	s->min = RT4505_ITORCH_MINUA;
+	s->step = RT4505_ITORCH_STPUA;
+	s->max = s->val = s->min + (lcdev->max_brightness - 1) * s->step;
+
+	config->flash_faults = LED_FAULT_OVER_VOLTAGE |
+			       LED_FAULT_SHORT_CIRCUIT |
+			       LED_FAULT_LED_OVER_TEMPERATURE |
+			       LED_FAULT_TIMEOUT;
+	config->has_external_strobe = 1;
+}
+#else
+static const struct v4l2_flash_ops v4l2_flash_ops;
+static void rt4505_init_v4l2_config(struct rt4505_priv *priv,
+				    struct v4l2_flash_config *config)
+{
+}
+#endif
+
+static void rt4505_init_flash_properties(struct rt4505_priv *priv,
+					 struct fwnode_handle *child)
+{
+	struct led_classdev_flash *flash = &priv->flash;
+	struct led_classdev *lcdev = &flash->led_cdev;
+	struct led_flash_setting *s;
+	u32 val;
+	int ret;
+
+	ret = fwnode_property_read_u32(child, "led-max-microamp", &val);
+	if (ret) {
+		dev_warn(priv->dev, "led-max-microamp DT property missing\n");
+		val = RT4505_ITORCH_MINUA;
+	} else
+		val = clamp_val(val, RT4505_ITORCH_MINUA, RT4505_ITORCH_MAXUA);
+
+	lcdev->max_brightness =
+		(val - RT4505_ITORCH_MINUA) / RT4505_ITORCH_STPUA + 1;
+	lcdev->brightness_set_blocking = rt4505_torch_brightness_set;
+	lcdev->brightness_get = rt4505_torch_brightness_get;
+	lcdev->flags |= LED_DEV_CAP_FLASH;
+
+	ret = fwnode_property_read_u32(child, "flash-max-microamp", &val);
+	if (ret) {
+		dev_warn(priv->dev, "flash-max-microamp DT property missing\n");
+		val = RT4505_IFLASH_MINUA;
+	} else
+		val = clamp_val(val, RT4505_IFLASH_MINUA, RT4505_IFLASH_MAXUA);
+
+	s = &flash->brightness;
+	s->min = RT4505_IFLASH_MINUA;
+	s->step = RT4505_IFLASH_STPUA;
+	s->max = s->val = val;
+
+	ret = fwnode_property_read_u32(child, "flash-max-timeout-us", &val);
+	if (ret) {
+		dev_warn(priv->dev,
+			 "flash-max-timeout-us DT property missing\n");
+		val = RT4505_FLASHTO_MINUS;
+	} else
+		val = clamp_val(val, RT4505_FLASHTO_MINUS,
+				RT4505_FLASHTO_MAXUS);
+
+	s = &flash->timeout;
+	s->min = RT4505_FLASHTO_MINUS;
+	s->step = RT4505_FLASHTO_STPUS;
+	s->max = s->val = val;
+
+	flash->ops = &rt4505_flash_ops;
+}
+
+static int rt4505_probe(struct i2c_client *client)
+{
+	struct rt4505_priv *priv;
+	struct fwnode_handle *child;
+	struct led_init_data init_data = {};
+	struct v4l2_flash_config v4l2_config = {};
+	int ret;
+
+	priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->dev = &client->dev;
+	mutex_init(&priv->lock);
+
+	priv->regmap = devm_regmap_init_i2c(client, &rt4505_regmap_config);
+	if (IS_ERR(priv->regmap)) {
+		dev_err(priv->dev, "Failed to allocate register map\n");
+		return PTR_ERR(priv->regmap);
+	}
+
+	ret = regmap_write(priv->regmap, RT4505_REG_RESET, RT4505_RESET_MASK);
+	if (ret) {
+		dev_err(priv->dev, "Failed to reset registers\n");
+		return ret;
+	}
+
+	child = fwnode_get_next_available_child_node(client->dev.fwnode, NULL);
+	if (!child) {
+		dev_err(priv->dev, "Failed to get child node\n");
+		return -EINVAL;
+	}
+	init_data.fwnode = child;
+
+	rt4505_init_flash_properties(priv, child);
+	ret = devm_led_classdev_flash_register_ext(priv->dev, &priv->flash,
+						   &init_data);
+	if (ret) {
+		dev_err(priv->dev, "Failed to register flash\n");
+		return ret;
+	}
+
+	rt4505_init_v4l2_config(priv, &v4l2_config);
+	priv->v4l2_flash = v4l2_flash_init(priv->dev, init_data.fwnode,
+					   &priv->flash, &v4l2_flash_ops,
+					   &v4l2_config);
+	if (IS_ERR(priv->v4l2_flash)) {
+		dev_err(priv->dev, "Failed to register v4l2 flash\n");
+		return PTR_ERR(priv->v4l2_flash);
+	}
+
+	i2c_set_clientdata(client, priv);
+	return 0;
+}
+
+static int rt4505_remove(struct i2c_client *client)
+{
+	struct rt4505_priv *priv = i2c_get_clientdata(client);
+
+	v4l2_flash_release(priv->v4l2_flash);
+	return 0;
+}
+
+static void rt4505_shutdown(struct i2c_client *client)
+{
+	struct rt4505_priv *priv = i2c_get_clientdata(client);
+
+	/* Reset registers to make sure all off before shutdown */
+	regmap_write(priv->regmap, RT4505_REG_RESET, RT4505_RESET_MASK);
+}
+
+static const struct of_device_id __maybe_unused rt4505_leds_match[] = {
+	{ .compatible = "richtek,rt4505", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, rt4505_leds_match);
+
+static struct i2c_driver rt4505_driver = {
+	.driver = {
+		.name = "rt4505",
+		.of_match_table = of_match_ptr(rt4505_leds_match),
+	},
+	.probe_new = rt4505_probe,
+	.remove = rt4505_remove,
+	.shutdown = rt4505_shutdown,
+};
+module_i2c_driver(rt4505_driver);
+
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_LICENSE("GPL v2");
-- 
cgit v1.2.3


From 944f4b0af9ca0d203ebc0d1426218af372d2d995 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Tue, 9 Mar 2021 11:37:32 +0200
Subject: gpiolib: Unify the checks on fwnode type

We have (historically) different approaches how we identify the type
of a given fwnode. Let's standardize them across the library code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/gpio/gpiolib.c | 28 +++++++++++++---------------
 1 file changed, 13 insertions(+), 15 deletions(-)

(limited to 'drivers')

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 6367646dce83..14d79c166124 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -3684,11 +3684,12 @@ EXPORT_SYMBOL_GPL(fwnode_gpiod_get_index);
  */
 int gpiod_count(struct device *dev, const char *con_id)
 {
+	const struct fwnode_handle *fwnode = dev ? dev_fwnode(dev) : NULL;
 	int count = -ENOENT;
 
-	if (IS_ENABLED(CONFIG_OF) && dev && dev->of_node)
+	if (is_of_node(fwnode))
 		count = of_gpio_get_count(dev, con_id);
-	else if (IS_ENABLED(CONFIG_ACPI) && dev && ACPI_HANDLE(dev))
+	else if (is_acpi_node(fwnode))
 		count = acpi_gpio_count(dev, con_id);
 
 	if (count < 0)
@@ -3826,18 +3827,17 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
 	int ret;
 	/* Maybe we have a device name, maybe not */
 	const char *devname = dev ? dev_name(dev) : "?";
+	const struct fwnode_handle *fwnode = dev ? dev_fwnode(dev) : NULL;
 
 	dev_dbg(dev, "GPIO lookup for consumer %s\n", con_id);
 
-	if (dev) {
-		/* Using device tree? */
-		if (IS_ENABLED(CONFIG_OF) && dev->of_node) {
-			dev_dbg(dev, "using device tree for GPIO lookup\n");
-			desc = of_find_gpio(dev, con_id, idx, &lookupflags);
-		} else if (ACPI_COMPANION(dev)) {
-			dev_dbg(dev, "using ACPI for GPIO lookup\n");
-			desc = acpi_find_gpio(dev, con_id, idx, &flags, &lookupflags);
-		}
+	/* Using device tree? */
+	if (is_of_node(fwnode)) {
+		dev_dbg(dev, "using device tree for GPIO lookup\n");
+		desc = of_find_gpio(dev, con_id, idx, &lookupflags);
+	} else if (is_acpi_node(fwnode)) {
+		dev_dbg(dev, "using ACPI for GPIO lookup\n");
+		desc = acpi_find_gpio(dev, con_id, idx, &flags, &lookupflags);
 	}
 
 	/*
@@ -3921,9 +3921,6 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
 	struct gpio_desc *desc = ERR_PTR(-ENODEV);
 	int ret;
 
-	if (!fwnode)
-		return ERR_PTR(-EINVAL);
-
 	if (is_of_node(fwnode)) {
 		desc = gpiod_get_from_of_node(to_of_node(fwnode),
 					      propname, index,
@@ -3939,7 +3936,8 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
 
 		acpi_gpio_update_gpiod_flags(&dflags, &info);
 		acpi_gpio_update_gpiod_lookup_flags(&lflags, &info);
-	}
+	} else
+		return ERR_PTR(-EINVAL);
 
 	/* Currently only ACPI takes this path */
 	ret = gpiod_request(desc, label);
-- 
cgit v1.2.3


From 1df62542e0161e828615d7ec233e68c18902b0dc Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Tue, 9 Mar 2021 11:37:33 +0200
Subject: gpiolib: Move of_node operations to gpiolib-of and correct fwnode use

The initial value of the OF node based on presence of parent, but
at the same time this operation somehow appeared separately from others
that handle the OF case. On the other hand there is no need to assign
dev->fwnode in the OF case if code properly retrieves fwnode, i.e.
via dev_fwnode() helper.

Amend gpiolib.c and gpiolib-of.c code in order to group OF operations.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/gpio/gpiolib-of.c | 6 ++++--
 drivers/gpio/gpiolib.c    | 9 ++++-----
 2 files changed, 8 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index baf0153b7bca..bbcc7c073f63 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -1042,11 +1042,13 @@ void of_gpiochip_remove(struct gpio_chip *chip)
 
 void of_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev)
 {
+	/* Set default OF node to parent's one if present */
+	if (gc->parent)
+		gdev->dev.of_node = gc->parent->of_node;
+
 	/* If the gpiochip has an assigned OF node this takes precedence */
 	if (gc->of_node)
 		gdev->dev.of_node = gc->of_node;
 	else
 		gc->of_node = gdev->dev.of_node;
-	if (gdev->dev.of_node)
-		gdev->dev.fwnode = of_fwnode_handle(gdev->dev.of_node);
 }
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 14d79c166124..90ead10bc086 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -586,12 +586,9 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data,
 	if (!gdev)
 		return -ENOMEM;
 	gdev->dev.bus = &gpio_bus_type;
+	gdev->dev.parent = gc->parent;
 	gdev->chip = gc;
 	gc->gpiodev = gdev;
-	if (gc->parent) {
-		gdev->dev.parent = gc->parent;
-		gdev->dev.of_node = gc->parent->of_node;
-	}
 
 	of_gpio_dev_init(gc, gdev);
 
@@ -4218,11 +4215,13 @@ EXPORT_SYMBOL_GPL(gpiod_put_array);
 
 static int gpio_bus_match(struct device *dev, struct device_driver *drv)
 {
+	struct fwnode_handle *fwnode = dev_fwnode(dev);
+
 	/*
 	 * Only match if the fwnode doesn't already have a proper struct device
 	 * created for it.
 	 */
-	if (dev->fwnode && dev->fwnode->dev != dev)
+	if (fwnode && fwnode->dev != dev)
 		return 0;
 	return 1;
 }
-- 
cgit v1.2.3


From 515321acb56e1360bce4c9d60c498ec126a669dc Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Tue, 9 Mar 2021 11:37:34 +0200
Subject: gpiolib: Introduce acpi_gpio_dev_init() and call it from core

In the ACPI case we may use the firmware node in the similar way
as it's done for OF case. We may use that fwnode for other purposes
in the future.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/gpio/gpiolib-acpi.c | 7 +++++++
 drivers/gpio/gpiolib-acpi.h | 4 ++++
 drivers/gpio/gpiolib.c      | 1 +
 3 files changed, 12 insertions(+)

(limited to 'drivers')

diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 1aacd2a5a1fd..21750be9c489 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -1291,6 +1291,13 @@ void acpi_gpiochip_remove(struct gpio_chip *chip)
 	kfree(acpi_gpio);
 }
 
+void acpi_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev)
+{
+	/* Set default fwnode to parent's one if present */
+	if (gc->parent)
+		ACPI_COMPANION_SET(&gdev->dev, ACPI_COMPANION(gc->parent));
+}
+
 static int acpi_gpio_package_count(const union acpi_object *obj)
 {
 	const union acpi_object *element = obj->package.elements;
diff --git a/drivers/gpio/gpiolib-acpi.h b/drivers/gpio/gpiolib-acpi.h
index e2edb632b2cc..e476558d9471 100644
--- a/drivers/gpio/gpiolib-acpi.h
+++ b/drivers/gpio/gpiolib-acpi.h
@@ -36,6 +36,8 @@ struct acpi_gpio_info {
 void acpi_gpiochip_add(struct gpio_chip *chip);
 void acpi_gpiochip_remove(struct gpio_chip *chip);
 
+void acpi_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev);
+
 void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
 void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
 
@@ -58,6 +60,8 @@ int acpi_gpio_count(struct device *dev, const char *con_id);
 static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
 static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
 
+static inline void acpi_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev) { }
+
 static inline void
 acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
 
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 90ead10bc086..84b0a83f87ed 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -591,6 +591,7 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data,
 	gc->gpiodev = gdev;
 
 	of_gpio_dev_init(gc, gdev);
+	acpi_gpio_dev_init(gc, gdev);
 
 	/*
 	 * Assign fwnode depending on the result of the previous calls,
-- 
cgit v1.2.3


From 5c63a9dbab55be3c0df512c9d8efe80a44cd2ce8 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Tue, 9 Mar 2021 11:37:35 +0200
Subject: gpiolib: Reuse device's fwnode to create IRQ domain

When IRQ domain is created for an ACPI case, the name of it becomes unknown-%d
since for now it utilizes of_node member only and doesn't consider fwnode case.
Convert IRQ domain creation code to utilize fwnode instead.

Before/After the change on Intel Galileo Gen 2 with two GPIO (IRQ) controllers:

  unknown-1	==>	\_SB.PCI0.GIP0.GPO
  unknown-2	==>	\_SB.NIO3

Due to the nature of this change we may also deduplicate the WARN():s
because in either case (DT or ACPI) the fwnode will be set correctly
and %pfw is an equivalent to what the current code prints as a prefix.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/gpio/gpiolib.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

(limited to 'drivers')

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 84b0a83f87ed..00b097e138b6 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1463,9 +1463,9 @@ static int gpiochip_add_irqchip(struct gpio_chip *gc,
 				struct lock_class_key *lock_key,
 				struct lock_class_key *request_key)
 {
+	struct fwnode_handle *fwnode = dev_fwnode(&gc->gpiodev->dev);
 	struct irq_chip *irqchip = gc->irq.chip;
 	const struct irq_domain_ops *ops = NULL;
-	struct device_node *np;
 	unsigned int type;
 	unsigned int i;
 
@@ -1477,7 +1477,6 @@ static int gpiochip_add_irqchip(struct gpio_chip *gc,
 		return -EINVAL;
 	}
 
-	np = gc->gpiodev->dev.of_node;
 	type = gc->irq.default_type;
 
 	/*
@@ -1485,16 +1484,10 @@ static int gpiochip_add_irqchip(struct gpio_chip *gc,
 	 * used to configure the interrupts, as you may end up with
 	 * conflicting triggers. Tell the user, and reset to NONE.
 	 */
-	if (WARN(np && type != IRQ_TYPE_NONE,
-		 "%s: Ignoring %u default trigger\n", np->full_name, type))
+	if (WARN(fwnode && type != IRQ_TYPE_NONE,
+		 "%pfw: Ignoring %u default trigger\n", fwnode, type))
 		type = IRQ_TYPE_NONE;
 
-	if (has_acpi_companion(gc->parent) && type != IRQ_TYPE_NONE) {
-		acpi_handle_warn(ACPI_HANDLE(gc->parent),
-				 "Ignoring %u default trigger\n", type);
-		type = IRQ_TYPE_NONE;
-	}
-
 	if (gc->to_irq)
 		chip_warn(gc, "to_irq is redefined in %s and you shouldn't rely on it\n", __func__);
 
@@ -1515,7 +1508,7 @@ static int gpiochip_add_irqchip(struct gpio_chip *gc,
 
 		if (!ops)
 			ops = &gpiochip_domain_ops;
-		gc->irq.domain = irq_domain_add_simple(np,
+		gc->irq.domain = irq_domain_create_simple(fwnode,
 			gc->ngpio,
 			gc->irq.first,
 			ops, gc);
-- 
cgit v1.2.3


From 266315fb7cbed86f628f3fb4bb89a90943b66718 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Tue, 9 Mar 2021 11:37:36 +0200
Subject: gpiolib: Fold conditionals into a simple ternary operator

It's quite spread code to initialize IRQ domain options.
Let's fold it into a simple oneliner.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/gpio/gpiolib.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 00b097e138b6..1427c1be749b 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1465,7 +1465,6 @@ static int gpiochip_add_irqchip(struct gpio_chip *gc,
 {
 	struct fwnode_handle *fwnode = dev_fwnode(&gc->gpiodev->dev);
 	struct irq_chip *irqchip = gc->irq.chip;
-	const struct irq_domain_ops *ops = NULL;
 	unsigned int type;
 	unsigned int i;
 
@@ -1503,15 +1502,11 @@ static int gpiochip_add_irqchip(struct gpio_chip *gc,
 			return ret;
 	} else {
 		/* Some drivers provide custom irqdomain ops */
-		if (gc->irq.domain_ops)
-			ops = gc->irq.domain_ops;
-
-		if (!ops)
-			ops = &gpiochip_domain_ops;
 		gc->irq.domain = irq_domain_create_simple(fwnode,
 			gc->ngpio,
 			gc->irq.first,
-			ops, gc);
+			gc->irq.domain_ops ?: &gpiochip_domain_ops,
+			gc);
 		if (!gc->irq.domain)
 			return -EINVAL;
 	}
-- 
cgit v1.2.3


From e5391a02bce2422fa57a520dfaaf2693ec7f9546 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Mon, 15 Mar 2021 20:51:41 +0200
Subject: gpio: mockup: Drop duplicate NULL check in
 gpio_mockup_unregister_pdevs()

Since platform_device_unregister() is NULL-aware, we don't need to duplicate
this check. Remove it and fold the rest of the code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/gpio/gpio-mockup.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c
index 28b757d34046..d7e73876a3b9 100644
--- a/drivers/gpio/gpio-mockup.c
+++ b/drivers/gpio/gpio-mockup.c
@@ -479,15 +479,10 @@ static struct platform_device *gpio_mockup_pdevs[GPIO_MOCKUP_MAX_GC];
 
 static void gpio_mockup_unregister_pdevs(void)
 {
-	struct platform_device *pdev;
 	int i;
 
-	for (i = 0; i < GPIO_MOCKUP_MAX_GC; i++) {
-		pdev = gpio_mockup_pdevs[i];
-
-		if (pdev)
-			platform_device_unregister(pdev);
-	}
+	for (i = 0; i < GPIO_MOCKUP_MAX_GC; i++)
+		platform_device_unregister(gpio_mockup_pdevs[i]);
 }
 
 static __init char **gpio_mockup_make_line_names(const char *label,
-- 
cgit v1.2.3


From 6613bc2301ba291a1c5a90e1dc24cf3edf223c03 Mon Sep 17 00:00:00 2001
From: Shradha Todi <shradha.t@samsung.com>
Date: Wed, 24 Mar 2021 15:46:09 +0530
Subject: PCI: endpoint: Fix NULL pointer dereference for ->get_features()

get_features ops of pci_epc_ops may return NULL, causing NULL pointer
dereference in pci_epf_test_alloc_space function. Let us add a check for
pci_epc_feature pointer in pci_epf_test_bind before we access it to avoid
any such NULL pointer dereference and return -ENOTSUPP in case
pci_epc_feature is not found.

When the patch is not applied and EPC features is not implemented in the
platform driver, we see the following dump due to kernel NULL pointer
dereference.

Call trace:
 pci_epf_test_bind+0xf4/0x388
 pci_epf_bind+0x3c/0x80
 pci_epc_epf_link+0xa8/0xcc
 configfs_symlink+0x1a4/0x48c
 vfs_symlink+0x104/0x184
 do_symlinkat+0x80/0xd4
 __arm64_sys_symlinkat+0x1c/0x24
 el0_svc_common.constprop.3+0xb8/0x170
 el0_svc_handler+0x70/0x88
 el0_svc+0x8/0x640
Code: d2800581 b9403ab9 f9404ebb 8b394f60 (f9400400)
---[ end trace a438e3c5a24f9df0 ]---

Link: https://lore.kernel.org/r/20210324101609.79278-1-shradha.t@samsung.com
Fixes: 2c04c5b8eef79 ("PCI: pci-epf-test: Use pci_epc_get_features() to get EPC features")
Signed-off-by: Sriram Dash <dash.sriram@gmail.com>
Signed-off-by: Shradha Todi <shradha.t@samsung.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Reviewed-by: Kishon Vijay Abraham I <kishon@ti.com>
---
 drivers/pci/endpoint/functions/pci-epf-test.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index c0ac4e9cbe72..bc35b3566be6 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -833,15 +833,18 @@ static int pci_epf_test_bind(struct pci_epf *epf)
 		return -EINVAL;
 
 	epc_features = pci_epc_get_features(epc, epf->func_no);
-	if (epc_features) {
-		linkup_notifier = epc_features->linkup_notifier;
-		core_init_notifier = epc_features->core_init_notifier;
-		test_reg_bar = pci_epc_get_first_free_bar(epc_features);
-		if (test_reg_bar < 0)
-			return -EINVAL;
-		pci_epf_configure_bar(epf, epc_features);
+	if (!epc_features) {
+		dev_err(&epf->dev, "epc_features not implemented\n");
+		return -EOPNOTSUPP;
 	}
 
+	linkup_notifier = epc_features->linkup_notifier;
+	core_init_notifier = epc_features->core_init_notifier;
+	test_reg_bar = pci_epc_get_first_free_bar(epc_features);
+	if (test_reg_bar < 0)
+		return -EINVAL;
+	pci_epf_configure_bar(epf, epc_features);
+
 	epf_test->test_reg_bar = test_reg_bar;
 	epf_test->epc_features = epc_features;
 
-- 
cgit v1.2.3


From 73e7f1732e800a88cafab31d75548c6fcfdd8c47 Mon Sep 17 00:00:00 2001
From: Fabio Estevam <festevam@gmail.com>
Date: Sat, 27 Mar 2021 21:38:56 -0700
Subject: Input: imx_keypad - convert to a DT-only driver

i.MX has been converted to a DT-only platform, so make the
adjustments to the driver to convert it to a DT-only driver.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20210327194307.541248-1-festevam@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/keyboard/imx_keypad.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/keyboard/imx_keypad.c b/drivers/input/keyboard/imx_keypad.c
index 1f5c9ea5e9e5..ae9303848571 100644
--- a/drivers/input/keyboard/imx_keypad.c
+++ b/drivers/input/keyboard/imx_keypad.c
@@ -408,27 +408,18 @@ open_err:
 	return -EIO;
 }
 
-#ifdef CONFIG_OF
 static const struct of_device_id imx_keypad_of_match[] = {
 	{ .compatible = "fsl,imx21-kpp", },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, imx_keypad_of_match);
-#endif
 
 static int imx_keypad_probe(struct platform_device *pdev)
 {
-	const struct matrix_keymap_data *keymap_data =
-			dev_get_platdata(&pdev->dev);
 	struct imx_keypad *keypad;
 	struct input_dev *input_dev;
 	int irq, error, i, row, col;
 
-	if (!keymap_data && !pdev->dev.of_node) {
-		dev_err(&pdev->dev, "no keymap defined\n");
-		return -EINVAL;
-	}
-
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
 		return irq;
@@ -469,7 +460,7 @@ static int imx_keypad_probe(struct platform_device *pdev)
 	input_dev->open = imx_keypad_open;
 	input_dev->close = imx_keypad_close;
 
-	error = matrix_keypad_build_keymap(keymap_data, NULL,
+	error = matrix_keypad_build_keymap(NULL, NULL,
 					   MAX_MATRIX_KEY_ROWS,
 					   MAX_MATRIX_KEY_COLS,
 					   keypad->keycodes, input_dev);
@@ -582,7 +573,7 @@ static struct platform_driver imx_keypad_driver = {
 	.driver		= {
 		.name	= "imx-keypad",
 		.pm	= &imx_kbd_pm_ops,
-		.of_match_table = of_match_ptr(imx_keypad_of_match),
+		.of_match_table = imx_keypad_of_match,
 	},
 	.probe		= imx_keypad_probe,
 };
-- 
cgit v1.2.3


From 31ec9c2746467a372b009940ce7b722055daaf6a Mon Sep 17 00:00:00 2001
From: Ryder Lee <ryder.lee@mediatek.com>
Date: Thu, 5 Nov 2020 04:58:33 +0800
Subject: PCI: mediatek: Configure FC and FTS for functions other than 0
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

"PCI_FUNC(port->slot << 3)" is always 0, so previously
mtk_pcie_startup_port() only configured FC credits and FTs for function
0.

Compute "func" correctly so we also configure functions other than
0. This affects MT2701 and MT7623.

Link: https://lore.kernel.org/r/c529dbfc066f4bda9b87edbdbf771f207e69b84e.1604510053.git.ryder.lee@mediatek.com
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
---
 drivers/pci/controller/pcie-mediatek.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
index 23548b517e4b..8af04848e0f9 100644
--- a/drivers/pci/controller/pcie-mediatek.c
+++ b/drivers/pci/controller/pcie-mediatek.c
@@ -760,7 +760,7 @@ static struct pci_ops mtk_pcie_ops = {
 static int mtk_pcie_startup_port(struct mtk_pcie_port *port)
 {
 	struct mtk_pcie *pcie = port->pcie;
-	u32 func = PCI_FUNC(port->slot << 3);
+	u32 func = PCI_FUNC(port->slot);
 	u32 slot = PCI_SLOT(port->slot << 3);
 	u32 val;
 	int err;
-- 
cgit v1.2.3


From dbc334fb411f2e87ca0e812dc7ba13464aa89504 Mon Sep 17 00:00:00 2001
From: Yang Li <yang.lee@linux.alibaba.com>
Date: Sun, 7 Feb 2021 17:08:38 +0800
Subject: platform/chrome: wilco_ec: convert stream-like files from
 nonseekable_open -> stream_open

Eliminate the following coccicheck warning:
./drivers/platform/chrome/wilco_ec/telemetry.c:259:1-17: WARNING:
telem_fops: .read() and .write() have stream semantic; safe to change
nonseekable_open -> stream_open.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/1612688918-63132-1-git-send-email-yang.lee@linux.alibaba.com
---
 drivers/platform/chrome/wilco_ec/telemetry.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/platform/chrome/wilco_ec/telemetry.c b/drivers/platform/chrome/wilco_ec/telemetry.c
index e06d96fb9426..60da7a29f2ff 100644
--- a/drivers/platform/chrome/wilco_ec/telemetry.c
+++ b/drivers/platform/chrome/wilco_ec/telemetry.c
@@ -256,7 +256,7 @@ static int telem_open(struct inode *inode, struct file *filp)
 	sess_data->dev_data = dev_data;
 	sess_data->has_msg = false;
 
-	nonseekable_open(inode, filp);
+	stream_open(inode, filp);
 	filp->private_data = sess_data;
 
 	return 0;
-- 
cgit v1.2.3


From 639ff208cb37c5a3f0198e62d04962b677d25c9c Mon Sep 17 00:00:00 2001
From: Prashant Malani <pmalani@chromium.org>
Date: Thu, 18 Mar 2021 18:51:03 -0700
Subject: platform/chrome: cros_ec_typec: Check for device within remove
 function

In a couple of call sites, we use the same pattern of checking for a
partner or cable device before attempting to remove it. Simplify this by
moving those checks into the remove functions.

Cc: Benson Leung <bleung@chromium.org>
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20210319015103.3751672-1-pmalani@chromium.org
---
 drivers/platform/chrome/cros_ec_typec.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

(limited to 'drivers')

diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index 0811562deecc..8e7fde3e7032 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -220,6 +220,9 @@ static void cros_typec_remove_partner(struct cros_typec_data *typec,
 {
 	struct cros_typec_port *port = typec->ports[port_num];
 
+	if (!port->partner)
+		return;
+
 	cros_typec_unregister_altmodes(typec, port_num, true);
 
 	cros_typec_usb_disconnect_state(port);
@@ -235,6 +238,9 @@ static void cros_typec_remove_cable(struct cros_typec_data *typec,
 {
 	struct cros_typec_port *port = typec->ports[port_num];
 
+	if (!port->cable)
+		return;
+
 	cros_typec_unregister_altmodes(typec, port_num, false);
 
 	typec_unregister_plug(port->plug);
@@ -253,11 +259,8 @@ static void cros_unregister_ports(struct cros_typec_data *typec)
 		if (!typec->ports[i])
 			continue;
 
-		if (typec->ports[i]->partner)
-			cros_typec_remove_partner(typec, i);
-
-		if (typec->ports[i]->cable)
-			cros_typec_remove_cable(typec, i);
+		cros_typec_remove_partner(typec, i);
+		cros_typec_remove_cable(typec, i);
 
 		usb_role_switch_put(typec->ports[i]->role_sw);
 		typec_switch_put(typec->ports[i]->ori_sw);
@@ -647,11 +650,8 @@ static void cros_typec_set_port_params_v1(struct cros_typec_data *typec,
 				 "Failed to register partner on port: %d\n",
 				 port_num);
 	} else {
-		if (typec->ports[port_num]->partner)
-			cros_typec_remove_partner(typec, port_num);
-
-		if (typec->ports[port_num]->cable)
-			cros_typec_remove_cable(typec, port_num);
+		cros_typec_remove_partner(typec, port_num);
+		cros_typec_remove_cable(typec, port_num);
 	}
 }
 
-- 
cgit v1.2.3


From c6e939c63c80c26460b25cf1150ebe8396e8adcf Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Mon, 22 Mar 2021 12:55:55 +0100
Subject: platform/chrome: cros_ec_typec: fix clang -Wformat warning

Clang warns about using the %h format modifier to truncate an
integer:

drivers/platform/chrome/cros_ec_typec.c:1031:3: error: format specifies type 'unsigned char' but the argument has type 'unsigned int' [-Werror,-Wformat]
                typec->pd_ctrl_ver);
                ^~~~~~~~~~~~~~~~~~
include/linux/dev_printk.h:131:47: note: expanded from macro 'dev_dbg'
                dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
                                                    ~~~     ^~~~~~~~~~~

Use an explicit bit mask to limit the number to its lower eight bits
instead.

Fixes: ad7c0510c99e ("platform/chrome: cros_ec_typec: Update port info from EC")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20210322115602.4003221-1-arnd@kernel.org
---
 drivers/platform/chrome/cros_ec_typec.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index 8e7fde3e7032..d3df1717a5fd 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -1027,8 +1027,8 @@ static int cros_typec_get_cmd_version(struct cros_typec_data *typec)
 	else
 		typec->pd_ctrl_ver = 0;
 
-	dev_dbg(typec->dev, "PD Control has version mask 0x%hhx\n",
-		typec->pd_ctrl_ver);
+	dev_dbg(typec->dev, "PD Control has version mask 0x%02x\n",
+		typec->pd_ctrl_ver & 0xff);
 
 	return 0;
 }
-- 
cgit v1.2.3


From a7bf66ff3d945db9dd2079265ce9cc5c374cecc3 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Thu, 17 Dec 2020 21:59:03 +0100
Subject: PCI/VPD: Remove obsolete Broadcom NIC quirk

quirk_brcm_570x_limit_vpd() was added in 2008 [0] when we didn't have the
logic to determine VPD size based on checking for the VPD end tag.  Now
that we do have this logic [1] and don't read beyond the end tag, this
quirk can be removed.

[0] 99cb233d60cb ("PCI: Limit VPD read/write lengths for Broadcom 5706, 5708, 5709 rev.")
[1] 104daa71b396 ("PCI: Determine actual VPD size on first access")
Link: https://lore.kernel.org/r/daa6acdf-5027-62c8-e3fb-125411b018f5@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/vpd.c | 46 ----------------------------------------------
 1 file changed, 46 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index 7915d10f9aa1..ef5165eb3b62 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -578,52 +578,6 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_QLOGIC, 0x2261, quirk_blacklist_vpd);
 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS, 0x0031,
 			      PCI_CLASS_BRIDGE_PCI, 8, quirk_blacklist_vpd);
 
-/*
- * For Broadcom 5706, 5708, 5709 rev. A nics, any read beyond the
- * VPD end tag will hang the device.  This problem was initially
- * observed when a vpd entry was created in sysfs
- * ('/sys/bus/pci/devices/<id>/vpd').   A read to this sysfs entry
- * will dump 32k of data.  Reading a full 32k will cause an access
- * beyond the VPD end tag causing the device to hang.  Once the device
- * is hung, the bnx2 driver will not be able to reset the device.
- * We believe that it is legal to read beyond the end tag and
- * therefore the solution is to limit the read/write length.
- */
-static void quirk_brcm_570x_limit_vpd(struct pci_dev *dev)
-{
-	/*
-	 * Only disable the VPD capability for 5706, 5706S, 5708,
-	 * 5708S and 5709 rev. A
-	 */
-	if ((dev->device == PCI_DEVICE_ID_NX2_5706) ||
-	    (dev->device == PCI_DEVICE_ID_NX2_5706S) ||
-	    (dev->device == PCI_DEVICE_ID_NX2_5708) ||
-	    (dev->device == PCI_DEVICE_ID_NX2_5708S) ||
-	    ((dev->device == PCI_DEVICE_ID_NX2_5709) &&
-	     (dev->revision & 0xf0) == 0x0)) {
-		if (dev->vpd)
-			dev->vpd->len = 0x80;
-	}
-}
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
-			PCI_DEVICE_ID_NX2_5706,
-			quirk_brcm_570x_limit_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
-			PCI_DEVICE_ID_NX2_5706S,
-			quirk_brcm_570x_limit_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
-			PCI_DEVICE_ID_NX2_5708,
-			quirk_brcm_570x_limit_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
-			PCI_DEVICE_ID_NX2_5708S,
-			quirk_brcm_570x_limit_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
-			PCI_DEVICE_ID_NX2_5709,
-			quirk_brcm_570x_limit_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
-			PCI_DEVICE_ID_NX2_5709S,
-			quirk_brcm_570x_limit_vpd);
-
 static void quirk_chelsio_extend_vpd(struct pci_dev *dev)
 {
 	int chip = (dev->device & 0xf000) >> 12;
-- 
cgit v1.2.3


From 26c0cf2a603d4ebf00d8c1baf714763fca31dba4 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Wed, 3 Feb 2021 09:48:03 +0100
Subject: PCI/VPD: Remove sysfs accessor size checking dead code
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Since 104daa71b396 ("PCI: Determine actual VPD size on first access")
attribute size is set to 0 (unlimited).

Remove the dead code that checks for "bin_attr->size > 0".

Link: https://lore.kernel.org/r/267eae86-f8a6-6792-a7f8-2c4fd51beedc@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
---
 drivers/pci/vpd.c | 14 --------------
 1 file changed, 14 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index ef5165eb3b62..ab81c7a5185f 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -403,13 +403,6 @@ static ssize_t read_vpd_attr(struct file *filp, struct kobject *kobj,
 {
 	struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));
 
-	if (bin_attr->size > 0) {
-		if (off > bin_attr->size)
-			count = 0;
-		else if (count > bin_attr->size - off)
-			count = bin_attr->size - off;
-	}
-
 	return pci_read_vpd(dev, off, count, buf);
 }
 
@@ -419,13 +412,6 @@ static ssize_t write_vpd_attr(struct file *filp, struct kobject *kobj,
 {
 	struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));
 
-	if (bin_attr->size > 0) {
-		if (off > bin_attr->size)
-			count = 0;
-		else if (count > bin_attr->size - off)
-			count = bin_attr->size - off;
-	}
-
 	return pci_write_vpd(dev, off, count, buf);
 }
 
-- 
cgit v1.2.3


From d4707d79fae08c8996a1ba45965a491045a22dda Mon Sep 17 00:00:00 2001
From: Dejin Zheng <zhengdejin5@gmail.com>
Date: Sun, 28 Mar 2021 22:41:18 +0800
Subject: PCI: xgene: Fix cfg resource mapping

In commit e2dcd20b1645 a change was made to use
devm_platform_ioremap_resource_byname() to simplify code and remove
the res variable; this was wrong since the res variable is still needed
and as an outcome the port->cfg_addr gets an erroneous address.

Revert the change going back to original behaviour.

Link: https://lore.kernel.org/r/20210328144118.305074-1-zhengdejin5@gmail.com
Fixes: e2dcd20b1645a ("PCI: controller: Convert to devm_platform_ioremap_resource_byname()")
Reported-by: dann.frazier@canonical.com
Tested-by: dann frazier <dann.frazier@canonical.com>
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: stable@vger.kernel.org    # v5.9+
---
 drivers/pci/controller/pci-xgene.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pci-xgene.c b/drivers/pci/controller/pci-xgene.c
index 2afdc865253e..7f503dd4ff81 100644
--- a/drivers/pci/controller/pci-xgene.c
+++ b/drivers/pci/controller/pci-xgene.c
@@ -354,7 +354,8 @@ static int xgene_pcie_map_reg(struct xgene_pcie_port *port,
 	if (IS_ERR(port->csr_base))
 		return PTR_ERR(port->csr_base);
 
-	port->cfg_base = devm_platform_ioremap_resource_byname(pdev, "cfg");
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg");
+	port->cfg_base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(port->cfg_base))
 		return PTR_ERR(port->cfg_base);
 	port->cfg_addr = res->start;
-- 
cgit v1.2.3


From 1fd3dde5e270ad08f1406f921c9a2cda154fcea9 Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <bhelgaas@google.com>
Date: Tue, 30 Mar 2021 12:43:16 -0500
Subject: PCI: Add pci_disable_parity()

Add pci_disable_parity() to disable reporting of parity errors for a
device by clearing PCI_COMMAND_PARITY.

The device will still set PCI_STATUS_DETECTED_PARITY when it detects
a parity error or receives a Poisoned TLP, but it will not set
PCI_STATUS_PARITY, which means it will not assert PERR#
(conventional PCI) or report Poisoned TLPs (PCIe).

Based-on: https://lore.kernel.org/linux-arm-kernel/d375987c-ea4f-dd98-4ef8-99b2fbfe7c33@gmail.com/
Based-on-patch-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/20210330174318.1289680-2-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci.c   | 17 +++++++++++++++++
 include/linux/pci.h |  1 +
 2 files changed, 18 insertions(+)

(limited to 'drivers')

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 16a17215f633..b1845e5e5c8f 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4453,6 +4453,23 @@ void pci_clear_mwi(struct pci_dev *dev)
 }
 EXPORT_SYMBOL(pci_clear_mwi);
 
+/**
+ * pci_disable_parity - disable parity checking for device
+ * @dev: the PCI device to operate on
+ *
+ * Disable parity checking for device @dev
+ */
+void pci_disable_parity(struct pci_dev *dev)
+{
+	u16 cmd;
+
+	pci_read_config_word(dev, PCI_COMMAND, &cmd);
+	if (cmd & PCI_COMMAND_PARITY) {
+		cmd &= ~PCI_COMMAND_PARITY;
+		pci_write_config_word(dev, PCI_COMMAND, cmd);
+	}
+}
+
 /**
  * pci_intx - enables/disables PCI INTx for device dev
  * @pdev: the PCI device to operate on
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 86c799c97b77..4eaa773115da 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1201,6 +1201,7 @@ int __must_check pci_set_mwi(struct pci_dev *dev);
 int __must_check pcim_set_mwi(struct pci_dev *dev);
 int pci_try_set_mwi(struct pci_dev *dev);
 void pci_clear_mwi(struct pci_dev *dev);
+void pci_disable_parity(struct pci_dev *dev);
 void pci_intx(struct pci_dev *dev, int enable);
 bool pci_check_and_mask_intx(struct pci_dev *dev);
 bool pci_check_and_unmask_intx(struct pci_dev *dev);
-- 
cgit v1.2.3


From d06a113fec57b2c012b94241af4a1bc5656458a2 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Tue, 30 Mar 2021 12:43:17 -0500
Subject: IB/mthca: Disable parity reporting
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

For Mellanox Tavor devices, we previously set dev->broken_parity_status,
which does not change the device's behavior; it merely prevents the EDAC
PCI error reporting from warning about Master Data Parity Error, Signaled
System Error, or Detected Parity Error for this device.

Instead, disable Parity Error Response so the device doesn't report
parity errors in the first place.

[bhelgaas: split out pci_disable_parity(), commit log, keep quirk static]
Link: https://lore.kernel.org/r/20210330174318.1289680-3-helgaas@kernel.org
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
---
 drivers/pci/quirks.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 653660e3ba9e..6aa9df411604 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -206,16 +206,11 @@ DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_ANY_ID, PCI_ANY_ID,
 				PCI_CLASS_BRIDGE_HOST, 8, quirk_mmio_always_on);
 
 /*
- * The Mellanox Tavor device gives false positive parity errors.  Mark this
- * device with a broken_parity_status to allow PCI scanning code to "skip"
- * this now blacklisted device.
+ * The Mellanox Tavor device gives false positive parity errors.  Disable
+ * parity error reporting.
  */
-static void quirk_mellanox_tavor(struct pci_dev *dev)
-{
-	dev->broken_parity_status = 1;	/* This device gives false positives */
-}
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_TAVOR, quirk_mellanox_tavor);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_TAVOR_BRIDGE, quirk_mellanox_tavor);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_TAVOR, pci_disable_parity);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_TAVOR_BRIDGE, pci_disable_parity);
 
 /*
  * Deal with broken BIOSes that neglect to enable passive release,
-- 
cgit v1.2.3


From 0a0b5f4b43671f8f128eb438edacee0a1d113385 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Tue, 30 Mar 2021 12:43:18 -0500
Subject: ARM: iop32x: disable N2100 PCI parity reporting
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

On the N2100, instead of just marking the r8169 chips as having
broken_parity_status, disable parity error reporting for them entirely.

This was the only relevant place that set broken_parity_status, so we no
longer need to check for it in the r8169 error interrupt handler.

[bhelgaas: squash into one patch, commit log]
Link: https://lore.kernel.org/r/20210330174318.1289680-4-helgaas@kernel.org
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
---
 arch/arm/mach-iop32x/n2100.c              |  8 ++++----
 drivers/net/ethernet/realtek/r8169_main.c | 14 --------------
 2 files changed, 4 insertions(+), 18 deletions(-)

(limited to 'drivers')

diff --git a/arch/arm/mach-iop32x/n2100.c b/arch/arm/mach-iop32x/n2100.c
index 78b9a5ee41c9..bf99e718f8b8 100644
--- a/arch/arm/mach-iop32x/n2100.c
+++ b/arch/arm/mach-iop32x/n2100.c
@@ -116,16 +116,16 @@ static struct hw_pci n2100_pci __initdata = {
 };
 
 /*
- * Both r8169 chips on the n2100 exhibit PCI parity problems.  Set
- * the ->broken_parity_status flag for both ports so that the r8169
- * driver knows it should ignore error interrupts.
+ * Both r8169 chips on the n2100 exhibit PCI parity problems.  Turn
+ * off parity reporting for both ports so we don't get error interrupts
+ * for them.
  */
 static void n2100_fixup_r8169(struct pci_dev *dev)
 {
 	if (dev->bus->number == 0 &&
 	    (dev->devfn == PCI_DEVFN(1, 0) ||
 	     dev->devfn == PCI_DEVFN(2, 0)))
-		dev->broken_parity_status = 1;
+		pci_disable_parity(dev);
 }
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
 
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index f704da3f214c..a6aff0d993eb 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -4358,20 +4358,6 @@ static void rtl8169_pcierr_interrupt(struct net_device *dev)
 	if (net_ratelimit())
 		netdev_err(dev, "PCI error (cmd = 0x%04x, status_errs = 0x%04x)\n",
 			   pci_cmd, pci_status_errs);
-	/*
-	 * The recovery sequence below admits a very elaborated explanation:
-	 * - it seems to work;
-	 * - I did not see what else could be done;
-	 * - it makes iop3xx happy.
-	 *
-	 * Feel free to adjust to your needs.
-	 */
-	if (pdev->broken_parity_status)
-		pci_cmd &= ~PCI_COMMAND_PARITY;
-	else
-		pci_cmd |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY;
-
-	pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
 
 	rtl_schedule_task(tp, RTL_FLAG_TASK_RESET_PENDING);
 }
-- 
cgit v1.2.3


From 693978527c17e6234918f40b157c740f5632c102 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Thu, 25 Mar 2021 19:57:51 +0100
Subject: PCI/ACPI: Fix acpi_pci_set_power_state() debug message
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

If PCI_D3cold is passed to acpi_pci_set_power_state() as the second
argument and there is no ACPI D3cold support for the given device, the
debug message will state that the device power state has been changed to
D3cold, while in fact it will be D3hot, because acpi_device_set_power()
falls back to D3hot automatically if D3cold is not supported without
returning an error.

To address this issue, modify the debug message to print the current power
state of the target PCI device's ACPI companion instead of printing the
target power state, which may not reflect the real final power state of the
device.

Link: https://lore.kernel.org/r/4319486.LvFx2qVVIh@kreacher
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
---
 drivers/pci/pci-acpi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 53502a751914..36bc23e21759 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -1021,7 +1021,7 @@ static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
 
 	if (!error)
 		pci_dbg(dev, "power state changed by ACPI to %s\n",
-			 acpi_power_state_string(state_conv[state]));
+		        acpi_power_state_string(adev->power.state));
 
 	return error;
 }
-- 
cgit v1.2.3


From 213e12205232886902507ba4e2af12d79b7cbbab Mon Sep 17 00:00:00 2001
From: Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com>
Date: Mon, 22 Feb 2021 14:17:31 +0530
Subject: PCI: xilinx-nwl: Enable coherent PCIe DMA traffic using CCI

Add support for routing PCIe DMA traffic coherently when
Cache Coherent Interconnect (CCI) is enabled in the system.
The "dma-coherent" property is used to determine if CCI is enabled
or not.
Refer to https://developer.arm.com/documentation/ddi0470/k/preface
for the CCI specification.

Link: https://lore.kernel.org/r/20210222084732.21521-1-bharat.kumar.gogada@xilinx.com
Signed-off-by: Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
---
 drivers/pci/controller/pcie-xilinx-nwl.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pcie-xilinx-nwl.c b/drivers/pci/controller/pcie-xilinx-nwl.c
index 07e36661bbc2..8689311c5ef6 100644
--- a/drivers/pci/controller/pcie-xilinx-nwl.c
+++ b/drivers/pci/controller/pcie-xilinx-nwl.c
@@ -26,6 +26,7 @@
 
 /* Bridge core config registers */
 #define BRCFG_PCIE_RX0			0x00000000
+#define BRCFG_PCIE_RX1			0x00000004
 #define BRCFG_INTERRUPT			0x00000010
 #define BRCFG_PCIE_RX_MSG_FILTER	0x00000020
 
@@ -128,6 +129,7 @@
 #define NWL_ECAM_VALUE_DEFAULT		12
 
 #define CFG_DMA_REG_BAR			GENMASK(2, 0)
+#define CFG_PCIE_CACHE			GENMASK(7, 0)
 
 #define INT_PCI_MSI_NR			(2 * 32)
 
@@ -675,6 +677,11 @@ static int nwl_pcie_bridge_init(struct nwl_pcie *pcie)
 	nwl_bridge_writel(pcie, CFG_ENABLE_MSG_FILTER_MASK,
 			  BRCFG_PCIE_RX_MSG_FILTER);
 
+	/* This routes the PCIe DMA traffic to go through CCI path */
+	if (of_dma_is_coherent(dev->of_node))
+		nwl_bridge_writel(pcie, nwl_bridge_readl(pcie, BRCFG_PCIE_RX1) |
+				  CFG_PCIE_CACHE, BRCFG_PCIE_RX1);
+
 	err = nwl_wait_for_link(pcie);
 	if (err)
 		return err;
-- 
cgit v1.2.3


From 2531fdbf8bfc22b0a2554bb3e3772dd8105d74ad Mon Sep 17 00:00:00 2001
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: Wed, 7 Apr 2021 23:14:50 -0700
Subject: Input: gpio-keys - fix crash when disabliing GPIO-less buttons

My brain-damaged adjustments to Paul's patch caused crashes in
gpio_keys_disable_button() when driver is used in GPIO-less (i.e.
purely interrupt-driven) setups, because I mixed together debounce and
release timers when they are in fact separate:

Unable to handle kernel NULL pointer dereference at virtual address 0000000c
...
PC is at hrtimer_active+0xc/0x98
LR is at hrtimer_try_to_cancel+0x24/0x140
...
[<c01c43b8>] (hrtimer_active) from [<c01c50f4>] (hrtimer_try_to_cancel+0x24/0x140)
[<c01c50f4>] (hrtimer_try_to_cancel) from [<c01c5224>] (hrtimer_cancel+0x14/0x4c)
[<c01c5224>] (hrtimer_cancel) from [<bf1cae24>] (gpio_keys_attr_store_helper+0x1b8/0x1d8 [gpio_keys])
[<bf1cae24>] (gpio_keys_attr_store_helper [gpio_keys]) from [<bf1cae80>] (gpio_keys_store_disabled_keys+0x18/0x24 [gpio_keys])
[<bf1cae80>] (gpio_keys_store_disabled_keys [gpio_keys]) from [<c038ec7c>] (kernfs_fop_write_iter+0x10c/0x1cc)
[<c038ec7c>] (kernfs_fop_write_iter) from [<c02df858>] (vfs_write+0x2ac/0x404)
[<c02df858>] (vfs_write) from [<c02dfaf4>] (ksys_write+0x64/0xdc)
[<c02dfaf4>] (ksys_write) from [<c0100080>] (ret_fast_syscall+0x0/0x58)

Let's fix it up.

Fixes: c9efb0ba281e ("Input: gpio-keys - use hrtimer for software debounce, if possible")
Reported-by: Tony Lindgren <tony@atomide.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/YG1DFFgojSVfdpaz@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/keyboard/gpio_keys.c | 30 +++++++++++++-----------------
 1 file changed, 13 insertions(+), 17 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index fe8fc76ee22e..8dbf1e69c90a 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -125,6 +125,18 @@ static const unsigned long *get_bm_events_by_type(struct input_dev *dev,
 	return (type == EV_KEY) ? dev->keybit : dev->swbit;
 }
 
+static void gpio_keys_quiesce_key(void *data)
+{
+	struct gpio_button_data *bdata = data;
+
+	if (!bdata->gpiod)
+		hrtimer_cancel(&bdata->release_timer);
+	if (bdata->debounce_use_hrtimer)
+		hrtimer_cancel(&bdata->debounce_timer);
+	else
+		cancel_delayed_work_sync(&bdata->work);
+}
+
 /**
  * gpio_keys_disable_button() - disables given GPIO button
  * @bdata: button data for button to be disabled
@@ -145,12 +157,7 @@ static void gpio_keys_disable_button(struct gpio_button_data *bdata)
 		 * Disable IRQ and associated timer/work structure.
 		 */
 		disable_irq(bdata->irq);
-
-		if (bdata->debounce_use_hrtimer)
-			hrtimer_cancel(&bdata->release_timer);
-		else
-			cancel_delayed_work_sync(&bdata->work);
-
+		gpio_keys_quiesce_key(bdata);
 		bdata->disabled = true;
 	}
 }
@@ -492,16 +499,6 @@ out:
 	return IRQ_HANDLED;
 }
 
-static void gpio_keys_quiesce_key(void *data)
-{
-	struct gpio_button_data *bdata = data;
-
-	if (bdata->debounce_use_hrtimer)
-		hrtimer_cancel(&bdata->debounce_timer);
-	else
-		cancel_delayed_work_sync(&bdata->work);
-}
-
 static int gpio_keys_setup_key(struct platform_device *pdev,
 				struct input_dev *input,
 				struct gpio_keys_drvdata *ddata,
@@ -635,7 +632,6 @@ static int gpio_keys_setup_key(struct platform_device *pdev,
 		}
 
 		bdata->release_delay = button->debounce_interval;
-		bdata->debounce_use_hrtimer = true;
 		hrtimer_init(&bdata->release_timer,
 			     CLOCK_REALTIME, HRTIMER_MODE_REL_HARD);
 		bdata->release_timer.function = gpio_keys_irq_timer;
-- 
cgit v1.2.3


From 3bbfd319034ddce59e023837a4aa11439460509b Mon Sep 17 00:00:00 2001
From: Feilong Lin <linfeilong@huawei.com>
Date: Thu, 25 Mar 2021 15:26:00 +0800
Subject: ACPI / hotplug / PCI: Fix reference count leak in enable_slot()

In enable_slot(), if pci_get_slot() returns NULL, we clear the SLOT_ENABLED
flag. When pci_get_slot() finds a device, it increments the device's
reference count.  In this case, we did not call pci_dev_put() to decrement
the reference count, so the memory of the device (struct pci_dev type) will
eventually leak.

Call pci_dev_put() to decrement its reference count when pci_get_slot()
returns a PCI device.

Link: https://lore.kernel.org/r/b411af88-5049-a1c6-83ac-d104a1f429be@huawei.com
Signed-off-by: Feilong Lin <linfeilong@huawei.com>
Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/pci/hotplug/acpiphp_glue.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 3365c93abf0e..f031302ad401 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -533,6 +533,7 @@ static void enable_slot(struct acpiphp_slot *slot, bool bridge)
 			slot->flags &= ~SLOT_ENABLED;
 			continue;
 		}
+		pci_dev_put(dev);
 	}
 }
 
-- 
cgit v1.2.3


From 5859c926d1f052ee61b5815b14658875c14f6243 Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Thu, 8 Apr 2021 15:26:58 +0800
Subject: PCI: tegra: Fix runtime PM imbalance in
 pex_ep_event_pex_rst_deassert()

pm_runtime_get_sync() will increase the runtime PM counter
even it returns an error. Thus a pairing decrement is needed
to prevent refcount leak. Fix this by replacing this API with
pm_runtime_resume_and_get(), which will not change the runtime
PM counter on error.

Link: https://lore.kernel.org/r/20210408072700.15791-1-dinghao.liu@zju.edu.cn
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Thierry Reding <treding@nvidia.com>
---
 drivers/pci/controller/dwc/pcie-tegra194.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index 18acd48e8e9b..9b6799258fa4 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -1645,7 +1645,7 @@ static void pex_ep_event_pex_rst_deassert(struct tegra_pcie_dw *pcie)
 	if (pcie->ep_state == EP_STATE_ENABLED)
 		return;
 
-	ret = pm_runtime_get_sync(dev);
+	ret = pm_runtime_resume_and_get(dev);
 	if (ret < 0) {
 		dev_err(dev, "Failed to get runtime sync for PCIe dev: %d\n",
 			ret);
-- 
cgit v1.2.3


From 89c6f314602efeecfe8d9093571b3bbfe1029ab5 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Wed, 24 Mar 2021 20:56:35 +0100
Subject: pwm: atmel: Free resources only after pwmchip_remove()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Before pwmchip_remove() returns the PWM is expected to be functional. So
remove the pwmchip before disabling the clock.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-atmel.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c
index a4d0be6b265b..d49da708337f 100644
--- a/drivers/pwm/pwm-atmel.c
+++ b/drivers/pwm/pwm-atmel.c
@@ -450,10 +450,12 @@ static int atmel_pwm_remove(struct platform_device *pdev)
 {
 	struct atmel_pwm_chip *atmel_pwm = platform_get_drvdata(pdev);
 
+	pwmchip_remove(&atmel_pwm->chip);
+
 	clk_unprepare(atmel_pwm->clk);
 	mutex_destroy(&atmel_pwm->isr_lock);
 
-	return pwmchip_remove(&atmel_pwm->chip);
+	return 0;
 }
 
 static struct platform_driver atmel_pwm_driver = {
-- 
cgit v1.2.3


From d4ac3917bca64a4f630dc6f7ba47fe71dbf0273e Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Wed, 24 Mar 2021 21:01:34 +0100
Subject: pwm: bcm-iproc: Free resources only after pwmchip_remove()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Before pwmchip_remove() returns the PWM is expected to be functional. So
remove the pwmchip before disabling the clock.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-bcm-iproc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-bcm-iproc.c b/drivers/pwm/pwm-bcm-iproc.c
index 529a66ab692d..edd2ce1760ab 100644
--- a/drivers/pwm/pwm-bcm-iproc.c
+++ b/drivers/pwm/pwm-bcm-iproc.c
@@ -253,9 +253,11 @@ static int iproc_pwmc_remove(struct platform_device *pdev)
 {
 	struct iproc_pwmc *ip = platform_get_drvdata(pdev);
 
+	pwmchip_remove(&ip->chip);
+
 	clk_disable_unprepare(ip->clk);
 
-	return pwmchip_remove(&ip->chip);
+	return 0;
 }
 
 static const struct of_device_id bcm_iproc_pwmc_dt[] = {
-- 
cgit v1.2.3


From 3c817469a53d93bbae52f8ead207dc0b9aeebae9 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Thu, 25 Mar 2021 09:29:31 +0100
Subject: pwm: bcm2835: Free resources only after pwmchip_remove()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Before pwmchip_remove() returns the PWM is expected to be functional. So
remove the pwmchip before disabling the clock.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-bcm2835.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-bcm2835.c b/drivers/pwm/pwm-bcm2835.c
index e4b54675b356..fc240d5b8121 100644
--- a/drivers/pwm/pwm-bcm2835.c
+++ b/drivers/pwm/pwm-bcm2835.c
@@ -179,9 +179,11 @@ static int bcm2835_pwm_remove(struct platform_device *pdev)
 {
 	struct bcm2835_pwm *pc = platform_get_drvdata(pdev);
 
+	pwmchip_remove(&pc->chip);
+
 	clk_disable_unprepare(pc->clk);
 
-	return pwmchip_remove(&pc->chip);
+	return 0;
 }
 
 static const struct of_device_id bcm2835_pwm_of_match[] = {
-- 
cgit v1.2.3


From 819e82460ac858cdca38f748829979602a7708ee Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Fri, 26 Mar 2021 09:18:04 +0100
Subject: pwm: bcm-kona: Don't modify HW state in .remove callback
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

A consumer is expected to disable a PWM before calling pwm_put(). And if
they didn't there is hopefully a good reason (or the consumer needs
fixing.) Also if disabling an enabled PWM was the right thing to do, this
should better be done in the framework instead of in each low level driver.

So drop the hardware modification from the .remove() callback.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-bcm-kona.c | 5 -----
 1 file changed, 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-bcm-kona.c b/drivers/pwm/pwm-bcm-kona.c
index f09a31042859..800b9edf2e71 100644
--- a/drivers/pwm/pwm-bcm-kona.c
+++ b/drivers/pwm/pwm-bcm-kona.c
@@ -310,11 +310,6 @@ static int kona_pwmc_probe(struct platform_device *pdev)
 static int kona_pwmc_remove(struct platform_device *pdev)
 {
 	struct kona_pwmc *kp = platform_get_drvdata(pdev);
-	unsigned int chan;
-
-	for (chan = 0; chan < kp->chip.npwm; chan++)
-		if (pwm_is_enabled(&kp->chip.pwms[chan]))
-			clk_disable_unprepare(kp->clk);
 
 	return pwmchip_remove(&kp->chip);
 }
-- 
cgit v1.2.3


From d58a484e7cf00412b8f7c17cd60caaa9fb4c2b42 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Sat, 27 Mar 2021 22:24:28 +0100
Subject: pwm: lpc18xx-sct: Free resources only after pwmchip_remove()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Before pwmchip_remove() returns the PWM is expected to be functional. So
remove the pwmchip before disabling the clock.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-lpc18xx-sct.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-lpc18xx-sct.c b/drivers/pwm/pwm-lpc18xx-sct.c
index 3f8e54ec28c6..b643ac61a2e7 100644
--- a/drivers/pwm/pwm-lpc18xx-sct.c
+++ b/drivers/pwm/pwm-lpc18xx-sct.c
@@ -441,13 +441,15 @@ static int lpc18xx_pwm_remove(struct platform_device *pdev)
 	struct lpc18xx_pwm_chip *lpc18xx_pwm = platform_get_drvdata(pdev);
 	u32 val;
 
+	pwmchip_remove(&lpc18xx_pwm->chip);
+
 	val = lpc18xx_pwm_readl(lpc18xx_pwm, LPC18XX_PWM_CTRL);
 	lpc18xx_pwm_writel(lpc18xx_pwm, LPC18XX_PWM_CTRL,
 			   val | LPC18XX_PWM_CTRL_HALT);
 
 	clk_disable_unprepare(lpc18xx_pwm->pwm_clk);
 
-	return pwmchip_remove(&lpc18xx_pwm->chip);
+	return 0;
 }
 
 static struct platform_driver lpc18xx_pwm_driver = {
-- 
cgit v1.2.3


From 13ef0414c891658c7d4c1d13fbd58a8d59a09dd4 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Mon, 29 Mar 2021 08:41:11 +0200
Subject: pwm: lpc3200: Don't modify HW state in .remove callback
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

A consumer is expected to disable a PWM before calling pwm_put(). And if
they didn't there is hopefully a good reason (or the consumer needs
fixing). Also if disabling an enabled PWM was the right thing to do,
this should better be done in the framework instead of in each low level
driver.

So drop the hardware modification from the .remove() callback.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-lpc32xx.c | 4 ----
 1 file changed, 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-lpc32xx.c b/drivers/pwm/pwm-lpc32xx.c
index c42cc314c170..2834a0f001d3 100644
--- a/drivers/pwm/pwm-lpc32xx.c
+++ b/drivers/pwm/pwm-lpc32xx.c
@@ -136,10 +136,6 @@ static int lpc32xx_pwm_probe(struct platform_device *pdev)
 static int lpc32xx_pwm_remove(struct platform_device *pdev)
 {
 	struct lpc32xx_pwm_chip *lpc32xx = platform_get_drvdata(pdev);
-	unsigned int i;
-
-	for (i = 0; i < lpc32xx->chip.npwm; i++)
-		pwm_disable(&lpc32xx->chip.pwms[i]);
 
 	return pwmchip_remove(&lpc32xx->chip);
 }
-- 
cgit v1.2.3


From a9ea2e793e5aee690b90d115dbb9229934d30f2e Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Tue, 30 Mar 2021 14:37:41 +0200
Subject: pwm: sti: Don't modify HW state in .remove callback
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

A consumer is expected to disable a PWM before calling pwm_put(). And if
they didn't there is hopefully a good reason (or the consumer needs
fixing). Also if disabling an enabled PWM was the right thing to do,
this should better be done in the framework instead of in each low level
driver.

So drop the hardware modification from the .remove() callback.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-sti.c | 3 ---
 1 file changed, 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-sti.c b/drivers/pwm/pwm-sti.c
index aa2b211d7ee3..3064b320df93 100644
--- a/drivers/pwm/pwm-sti.c
+++ b/drivers/pwm/pwm-sti.c
@@ -649,10 +649,7 @@ static int sti_pwm_probe(struct platform_device *pdev)
 static int sti_pwm_remove(struct platform_device *pdev)
 {
 	struct sti_pwm_chip *pc = platform_get_drvdata(pdev);
-	unsigned int i;
 
-	for (i = 0; i < pc->cdata->pwm_num_devs; i++)
-		pwm_disable(&pc->chip.pwms[i]);
 
 	clk_unprepare(pc->pwm_clk);
 	clk_unprepare(pc->cpt_clk);
-- 
cgit v1.2.3


From 0e719e8ca3946bac0034152309fe7565616bde50 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Tue, 30 Mar 2021 14:37:42 +0200
Subject: pwm: sti: Free resources only after pwmchip_remove()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Before pwmchip_remove() returns the PWM is expected to be functional. So
remove the pwmchip before disabling the clocks.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-sti.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-sti.c b/drivers/pwm/pwm-sti.c
index 3064b320df93..f491d56254d7 100644
--- a/drivers/pwm/pwm-sti.c
+++ b/drivers/pwm/pwm-sti.c
@@ -650,11 +650,12 @@ static int sti_pwm_remove(struct platform_device *pdev)
 {
 	struct sti_pwm_chip *pc = platform_get_drvdata(pdev);
 
+	pwmchip_remove(&pc->chip);
 
 	clk_unprepare(pc->pwm_clk);
 	clk_unprepare(pc->cpt_clk);
 
-	return pwmchip_remove(&pc->chip);
+	return 0;
 }
 
 static const struct of_device_id sti_pwm_of_match[] = {
-- 
cgit v1.2.3


From 64d7d074acd52e1bdff621f2cb86c0aae9bcef80 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Wed, 7 Apr 2021 10:01:53 +0200
Subject: pwm: lpss: Don't modify HW state in .remove callback
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

A consumer is expected to disable a PWM before calling pwm_put(). And if
they didn't there is hopefully a good reason (or the consumer needs
fixing). Also if disabling an enabled PWM was the right thing to do,
this should better be done in the framework instead of in each low level
driver.

So drop the hardware modification from the .remove() callback.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-lpss.c | 6 ------
 1 file changed, 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-lpss.c b/drivers/pwm/pwm-lpss.c
index 9ea6a176cbe5..58b4031524af 100644
--- a/drivers/pwm/pwm-lpss.c
+++ b/drivers/pwm/pwm-lpss.c
@@ -254,12 +254,6 @@ EXPORT_SYMBOL_GPL(pwm_lpss_probe);
 
 int pwm_lpss_remove(struct pwm_lpss_chip *lpwm)
 {
-	int i;
-
-	for (i = 0; i < lpwm->info->npwm; i++) {
-		if (pwm_is_enabled(&lpwm->chip.pwms[i]))
-			pm_runtime_put(lpwm->chip.dev);
-	}
 	return pwmchip_remove(&lpwm->chip);
 }
 EXPORT_SYMBOL_GPL(pwm_lpss_remove);
-- 
cgit v1.2.3


From 26594c6bbb60c6bc87e3762a86ceece57d164c66 Mon Sep 17 00:00:00 2001
From: Jia-Ju Bai <baijiaju1990@gmail.com>
Date: Sat, 6 Mar 2021 05:36:24 -0800
Subject: rpmsg: qcom_glink_native: fix error return code of
 qcom_glink_rx_data()

When idr_find() returns NULL to intent, no error return code of
qcom_glink_rx_data() is assigned.
To fix this bug, ret is assigned with -ENOENT in this case.

Fixes: 64f95f87920d ("rpmsg: glink: Use the local intents when receiving data")
Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Link: https://lore.kernel.org/r/20210306133624.17237-1-baijiaju1990@gmail.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/rpmsg/qcom_glink_native.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index edae0c9a8236..05533c71b10e 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -857,6 +857,7 @@ static int qcom_glink_rx_data(struct qcom_glink *glink, size_t avail)
 			dev_err(glink->dev,
 				"no intent found for channel %s intent %d",
 				channel->name, liid);
+			ret = -ENOENT;
 			goto advance_rx;
 		}
 	}
-- 
cgit v1.2.3


From 0349a070881f7e3b4472d886989db092ed3ccac8 Mon Sep 17 00:00:00 2001
From: Raphael Norwitz <raphael.norwitz@nutanix.com>
Date: Thu, 8 Apr 2021 19:05:27 +0000
Subject: PCI: Delay after FLR of Intel DC P4510 NVMe

Like the Intel DC P3700 NVMe, the Intel P4510 NVMe exhibits a timeout
failure when the driver tries to interact with the device too soon after an
FLR.

Add a device-specific reset method that delays 250ms after doing an FLR.

Link: https://lore.kernel.org/r/20210408190521.16897-1-raphael.norwitz@nutanix.com
Signed-off-by: Alay Shah <alay.shah@nutanix.com>
Signed-off-by: Suresh Gumpula <suresh.gumpula@nutanix.com>
Signed-off-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
---
 drivers/pci/quirks.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 653660e3ba9e..5a8c059b848d 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3922,6 +3922,7 @@ static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {
 		reset_ivb_igd },
 	{ PCI_VENDOR_ID_SAMSUNG, 0xa804, nvme_disable_and_flr },
 	{ PCI_VENDOR_ID_INTEL, 0x0953, delay_250ms_after_flr },
+	{ PCI_VENDOR_ID_INTEL, 0x0a54, delay_250ms_after_flr },
 	{ PCI_VENDOR_ID_CHELSIO, PCI_ANY_ID,
 		reset_chelsio_generic_dev },
 	{ 0 }
-- 
cgit v1.2.3


From 65299e8bfb24774e6340e93ae49f6626598917c8 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Fri, 9 Apr 2021 22:29:07 -0700
Subject: Input: elants_i2c - do not bind to i2c-hid compatible ACPI
 instantiated devices

Several users have been reporting that elants_i2c gives several errors
during probe and that their touchscreen does not work on their Lenovo AMD
based laptops with a touchscreen with a ELAN0001 ACPI hardware-id:

[    0.550596] elants_i2c i2c-ELAN0001:00: i2c-ELAN0001:00 supply vcc33 not found, using dummy regulator
[    0.551836] elants_i2c i2c-ELAN0001:00: i2c-ELAN0001:00 supply vccio not found, using dummy regulator
[    0.560932] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (77 77 77 77): -121
[    0.562427] elants_i2c i2c-ELAN0001:00: software reset failed: -121
[    0.595925] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (77 77 77 77): -121
[    0.597974] elants_i2c i2c-ELAN0001:00: software reset failed: -121
[    0.621893] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (77 77 77 77): -121
[    0.622504] elants_i2c i2c-ELAN0001:00: software reset failed: -121
[    0.632650] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (4d 61 69 6e): -121
[    0.634256] elants_i2c i2c-ELAN0001:00: boot failed: -121
[    0.699212] elants_i2c i2c-ELAN0001:00: invalid 'hello' packet: 00 00 ff ff
[    1.630506] elants_i2c i2c-ELAN0001:00: Failed to read fw id: -121
[    1.645508] elants_i2c i2c-ELAN0001:00: unknown packet 00 00 ff ff

Despite these errors, the elants_i2c driver stays bound to the device
(it returns 0 from its probe method despite the errors), blocking the
i2c-hid driver from binding.

Manually unbinding the elants_i2c driver and binding the i2c-hid driver
makes the touchscreen work.

Check if the ACPI-fwnode for the touchscreen contains one of the i2c-hid
compatiblity-id strings and if it has the I2C-HID spec's DSM to get the
HID descriptor address, If it has both then make elants_i2c not bind,
so that the i2c-hid driver can bind.

This assumes that non of the (older) elan touchscreens which actually
need the elants_i2c driver falsely advertise an i2c-hid compatiblity-id
+ DSM in their ACPI-fwnodes. If some of them actually do have this
false advertising, then this change may lead to regressions.

While at it also drop the unnecessary DEVICE_NAME prefixing of the
"I2C check functionality error", dev_err already outputs the driver-name.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=207759
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210405202756.16830-1-hdegoede@redhat.com

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/elants_i2c.c | 44 ++++++++++++++++++++++++++++++++--
 1 file changed, 42 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c
index 4c2b579f6c8b..36cf5694bfcc 100644
--- a/drivers/input/touchscreen/elants_i2c.c
+++ b/drivers/input/touchscreen/elants_i2c.c
@@ -38,6 +38,7 @@
 #include <linux/of.h>
 #include <linux/gpio/consumer.h>
 #include <linux/regulator/consumer.h>
+#include <linux/uuid.h>
 #include <asm/unaligned.h>
 
 /* Device, Driver information */
@@ -1334,6 +1335,40 @@ static void elants_i2c_power_off(void *_data)
 	}
 }
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id i2c_hid_ids[] = {
+	{"ACPI0C50", 0 },
+	{"PNP0C50", 0 },
+	{ },
+};
+
+static const guid_t i2c_hid_guid =
+	GUID_INIT(0x3CDFF6F7, 0x4267, 0x4555,
+		  0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE);
+
+static bool elants_acpi_is_hid_device(struct device *dev)
+{
+	acpi_handle handle = ACPI_HANDLE(dev);
+	union acpi_object *obj;
+
+	if (acpi_match_device_ids(ACPI_COMPANION(dev), i2c_hid_ids))
+		return false;
+
+	obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL, ACPI_TYPE_INTEGER);
+	if (obj) {
+		ACPI_FREE(obj);
+		return true;
+	}
+
+	return false;
+}
+#else
+static bool elants_acpi_is_hid_device(struct device *dev)
+{
+	return false;
+}
+#endif
+
 static int elants_i2c_probe(struct i2c_client *client,
 			    const struct i2c_device_id *id)
 {
@@ -1342,9 +1377,14 @@ static int elants_i2c_probe(struct i2c_client *client,
 	unsigned long irqflags;
 	int error;
 
+	/* Don't bind to i2c-hid compatible devices, these are handled by the i2c-hid drv. */
+	if (elants_acpi_is_hid_device(&client->dev)) {
+		dev_warn(&client->dev, "This device appears to be an I2C-HID device, not binding\n");
+		return -ENODEV;
+	}
+
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
-		dev_err(&client->dev,
-			"%s: i2c check functionality error\n", DEVICE_NAME);
+		dev_err(&client->dev, "I2C check functionality error\n");
 		return -ENXIO;
 	}
 
-- 
cgit v1.2.3


From e479187748a8f151a85116a7091c599b121fdea5 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Fri, 9 Apr 2021 22:29:49 -0700
Subject: Input: silead - add workaround for x86 BIOS-es which bring the chip
 up in a stuck state

Some buggy BIOS-es bring up the touchscreen-controller in a stuck
state where it blocks the I2C bus. Specifically this happens on
the Jumper EZpad 7 tablet model.

After much poking at this problem I have found that the following steps
are necessary to unstuck the chip / bus:

1. Turn off the Silead chip.
2. Try to do an I2C transfer with the chip, this will fail in response to
   which the I2C-bus-driver will call: i2c_recover_bus() which will unstuck
   the I2C-bus. Note the unstuck-ing of the I2C bus only works if we first
   drop the chip of the bus by turning it off.
3. Turn the chip back on.

On the x86/ACPI systems were this problem is seen, step 1. and 3. require
making ACPI calls and dealing with ACPI Power Resources. This commit adds
a workaround which runtime-suspends the chip to turn it off, leaving it up
to the ACPI subsystem to deal with all the ACPI specific details.

There is no good way to detect this bug, so the workaround gets activated
by a new "silead,stuck-controller-bug" boolean device-property. Since this
is only used on x86/ACPI, this will be set by model specific device-props
set by drivers/platform/x86/touchscreen_dmi.c. Therefor this new
device-property is not documented in the DT-bindings.

Dmesg will contain the following messages on systems where the workaround
is activated:

[   54.309029] silead_ts i2c-MSSL1680:00: [Firmware Bug]: Stuck I2C bus: please ignore the next 'controller timed out' error
[   55.373593] i2c_designware 808622C1:04: controller timed out
[   55.582186] silead_ts i2c-MSSL1680:00: Silead chip ID: 0x80360000

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210405202745.16777-1-hdegoede@redhat.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/silead.c | 44 ++++++++++++++++++++++++++++++++++----
 1 file changed, 40 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/silead.c b/drivers/input/touchscreen/silead.c
index 32725d7422de..1ee760bac0cf 100644
--- a/drivers/input/touchscreen/silead.c
+++ b/drivers/input/touchscreen/silead.c
@@ -20,6 +20,7 @@
 #include <linux/input/mt.h>
 #include <linux/input/touchscreen.h>
 #include <linux/pm.h>
+#include <linux/pm_runtime.h>
 #include <linux/irq.h>
 #include <linux/regulator/consumer.h>
 
@@ -335,10 +336,8 @@ static int silead_ts_get_id(struct i2c_client *client)
 
 	error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_ID,
 					      sizeof(chip_id), (u8 *)&chip_id);
-	if (error < 0) {
-		dev_err(&client->dev, "Chip ID read error %d\n", error);
+	if (error < 0)
 		return error;
-	}
 
 	data->chip_id = le32_to_cpu(chip_id);
 	dev_info(&client->dev, "Silead chip ID: 0x%8X", data->chip_id);
@@ -351,12 +350,49 @@ static int silead_ts_setup(struct i2c_client *client)
 	int error;
 	u32 status;
 
+	/*
+	 * Some buggy BIOS-es bring up the chip in a stuck state where it
+	 * blocks the I2C bus. The following steps are necessary to
+	 * unstuck the chip / bus:
+	 * 1. Turn off the Silead chip.
+	 * 2. Try to do an I2C transfer with the chip, this will fail in
+	 *    response to which the I2C-bus-driver will call:
+	 *    i2c_recover_bus() which will unstuck the I2C-bus. Note the
+	 *    unstuck-ing of the I2C bus only works if we first drop the
+	 *    chip off the bus by turning it off.
+	 * 3. Turn the chip back on.
+	 *
+	 * On the x86/ACPI systems were this problem is seen, step 1. and
+	 * 3. require making ACPI calls and dealing with ACPI Power
+	 * Resources. The workaround below runtime-suspends the chip to
+	 * turn it off, leaving it up to the ACPI subsystem to deal with
+	 * this.
+	 */
+
+	if (device_property_read_bool(&client->dev,
+				      "silead,stuck-controller-bug")) {
+		pm_runtime_set_active(&client->dev);
+		pm_runtime_enable(&client->dev);
+		pm_runtime_allow(&client->dev);
+
+		pm_runtime_suspend(&client->dev);
+
+		dev_warn(&client->dev, FW_BUG "Stuck I2C bus: please ignore the next 'controller timed out' error\n");
+		silead_ts_get_id(client);
+
+		/* The forbid will also resume the device */
+		pm_runtime_forbid(&client->dev);
+		pm_runtime_disable(&client->dev);
+	}
+
 	silead_ts_set_power(client, SILEAD_POWER_OFF);
 	silead_ts_set_power(client, SILEAD_POWER_ON);
 
 	error = silead_ts_get_id(client);
-	if (error)
+	if (error) {
+		dev_err(&client->dev, "Chip ID read error %d\n", error);
 		return error;
+	}
 
 	error = silead_ts_init(client);
 	if (error)
-- 
cgit v1.2.3


From cbdb24e59e7fc1943bc72bab4a7b477d298a2d80 Mon Sep 17 00:00:00 2001
From: Vincent Knecht <vincent.knecht@mailoo.org>
Date: Fri, 9 Apr 2021 13:29:03 -0700
Subject: Input: add MStar MSG2638 touchscreen driver

Add support for the msg2638 touchscreen IC from MStar.
Firmware handling, wakeup gestures and other specialties are not supported.
This driver reuses zinitix.c structure, while the checksum and irq handler
functions are based on out-of-tree driver for Alcatel Idol 3 (4.7").

Signed-off-by: Vincent Knecht <vincent.knecht@mailoo.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210305153815.126937-2-vincent.knecht@mailoo.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/Kconfig   |  12 ++
 drivers/input/touchscreen/Makefile  |   1 +
 drivers/input/touchscreen/msg2638.c | 337 ++++++++++++++++++++++++++++++++++++
 3 files changed, 350 insertions(+)
 create mode 100644 drivers/input/touchscreen/msg2638.c

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index aead3ad6ba6a..db1a4c78eec3 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -590,6 +590,18 @@ config TOUCHSCREEN_MELFAS_MIP4
 	  To compile this driver as a module, choose M here:
 	  the module will be called melfas_mip4.
 
+config TOUCHSCREEN_MSG2638
+	tristate "MStar msg2638 touchscreen support"
+	depends on I2C
+	depends on GPIOLIB || COMPILE_TEST
+	help
+	  Say Y here if you have an I2C touchscreen using MStar msg2638.
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called msg2638.
+
 config TOUCHSCREEN_MTOUCH
 	tristate "MicroTouch serial touchscreens"
 	select SERIO
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 80cd241b4c1b..ee1d3d3fd918 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -58,6 +58,7 @@ obj-$(CONFIG_TOUCHSCREEN_MCS5000)	+= mcs5000_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MELFAS_MIP4)	+= melfas_mip4.o
 obj-$(CONFIG_TOUCHSCREEN_MIGOR)		+= migor_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MMS114)	+= mms114.o
+obj-$(CONFIG_TOUCHSCREEN_MSG2638)	+= msg2638.o
 obj-$(CONFIG_TOUCHSCREEN_MTOUCH)	+= mtouch.o
 obj-$(CONFIG_TOUCHSCREEN_MK712)		+= mk712.o
 obj-$(CONFIG_TOUCHSCREEN_HP600)		+= hp680_ts_input.o
diff --git a/drivers/input/touchscreen/msg2638.c b/drivers/input/touchscreen/msg2638.c
new file mode 100644
index 000000000000..75536bc88969
--- /dev/null
+++ b/drivers/input/touchscreen/msg2638.c
@@ -0,0 +1,337 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for MStar msg2638 touchscreens
+ *
+ * Copyright (c) 2021 Vincent Knecht <vincent.knecht@mailoo.org>
+ *
+ * Checksum and IRQ handler based on mstar_drv_common.c and
+ * mstar_drv_mutual_fw_control.c
+ * Copyright (c) 2006-2012 MStar Semiconductor, Inc.
+ *
+ * Driver structure based on zinitix.c by Michael Srba <Michael.Srba@seznam.cz>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/input/touchscreen.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#define MODE_DATA_RAW			0x5A
+
+#define MAX_SUPPORTED_FINGER_NUM	5
+
+#define CHIP_ON_DELAY_MS		15
+#define FIRMWARE_ON_DELAY_MS		50
+#define RESET_DELAY_MIN_US		10000
+#define RESET_DELAY_MAX_US		11000
+
+struct packet {
+	u8	xy_hi; /* higher bits of x and y coordinates */
+	u8	x_low;
+	u8	y_low;
+	u8	pressure;
+};
+
+struct touch_event {
+	u8	mode;
+	struct	packet pkt[MAX_SUPPORTED_FINGER_NUM];
+	u8	proximity;
+	u8	checksum;
+};
+
+struct msg2638_ts_data {
+	struct i2c_client *client;
+	struct input_dev *input_dev;
+	struct touchscreen_properties prop;
+	struct regulator_bulk_data supplies[2];
+	struct gpio_desc *reset_gpiod;
+};
+
+static u8 msg2638_checksum(u8 *data, u32 length)
+{
+	s32 sum = 0;
+	u32 i;
+
+	for (i = 0; i < length; i++)
+		sum += data[i];
+
+	return (u8)((-sum) & 0xFF);
+}
+
+static irqreturn_t msg2638_ts_irq_handler(int irq, void *msg2638_handler)
+{
+	struct msg2638_ts_data *msg2638 = msg2638_handler;
+	struct i2c_client *client = msg2638->client;
+	struct input_dev *input = msg2638->input_dev;
+	struct touch_event touch_event;
+	u32 len = sizeof(touch_event);
+	struct i2c_msg msg[] = {
+		{
+			.addr	= client->addr,
+			.flags	= I2C_M_RD,
+			.len	= sizeof(touch_event),
+			.buf	= (u8 *)&touch_event,
+		},
+	};
+	struct packet *p;
+	u16 x, y;
+	int ret;
+	int i;
+
+	ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
+	if (ret != ARRAY_SIZE(msg)) {
+		dev_err(&client->dev,
+			"Failed I2C transfer in irq handler: %d\n",
+			ret < 0 ? ret : -EIO);
+		goto out;
+	}
+
+	if (touch_event.mode != MODE_DATA_RAW)
+		goto out;
+
+	if (msg2638_checksum((u8 *)&touch_event, len - 1) !=
+						touch_event.checksum) {
+		dev_err(&client->dev, "Failed checksum!\n");
+		goto out;
+	}
+
+	for (i = 0; i < MAX_SUPPORTED_FINGER_NUM; i++) {
+		p = &touch_event.pkt[i];
+
+		/* Ignore non-pressed finger data */
+		if (p->xy_hi == 0xFF && p->x_low == 0xFF && p->y_low == 0xFF)
+			continue;
+
+		x = (((p->xy_hi & 0xF0) << 4) | p->x_low);
+		y = (((p->xy_hi & 0x0F) << 8) | p->y_low);
+
+		input_mt_slot(input, i);
+		input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
+		touchscreen_report_pos(input, &msg2638->prop, x, y, true);
+	}
+
+	input_mt_sync_frame(msg2638->input_dev);
+	input_sync(msg2638->input_dev);
+
+out:
+	return IRQ_HANDLED;
+}
+
+static void msg2638_reset(struct msg2638_ts_data *msg2638)
+{
+	gpiod_set_value_cansleep(msg2638->reset_gpiod, 1);
+	usleep_range(RESET_DELAY_MIN_US, RESET_DELAY_MAX_US);
+	gpiod_set_value_cansleep(msg2638->reset_gpiod, 0);
+	msleep(FIRMWARE_ON_DELAY_MS);
+}
+
+static int msg2638_start(struct msg2638_ts_data *msg2638)
+{
+	int error;
+
+	error = regulator_bulk_enable(ARRAY_SIZE(msg2638->supplies),
+				      msg2638->supplies);
+	if (error) {
+		dev_err(&msg2638->client->dev,
+			"Failed to enable regulators: %d\n", error);
+		return error;
+	}
+
+	msleep(CHIP_ON_DELAY_MS);
+
+	msg2638_reset(msg2638);
+
+	enable_irq(msg2638->client->irq);
+
+	return 0;
+}
+
+static int msg2638_stop(struct msg2638_ts_data *msg2638)
+{
+	int error;
+
+	disable_irq(msg2638->client->irq);
+
+	error = regulator_bulk_disable(ARRAY_SIZE(msg2638->supplies),
+				       msg2638->supplies);
+	if (error) {
+		dev_err(&msg2638->client->dev,
+			"Failed to disable regulators: %d\n", error);
+		return error;
+	}
+
+	return 0;
+}
+
+static int msg2638_input_open(struct input_dev *dev)
+{
+	struct msg2638_ts_data *msg2638 = input_get_drvdata(dev);
+
+	return msg2638_start(msg2638);
+}
+
+static void msg2638_input_close(struct input_dev *dev)
+{
+	struct msg2638_ts_data *msg2638 = input_get_drvdata(dev);
+
+	msg2638_stop(msg2638);
+}
+
+static int msg2638_init_input_dev(struct msg2638_ts_data *msg2638)
+{
+	struct device *dev = &msg2638->client->dev;
+	struct input_dev *input_dev;
+	int error;
+
+	input_dev = devm_input_allocate_device(dev);
+	if (!input_dev) {
+		dev_err(dev, "Failed to allocate input device.\n");
+		return -ENOMEM;
+	}
+
+	input_set_drvdata(input_dev, msg2638);
+	msg2638->input_dev = input_dev;
+
+	input_dev->name = "MStar TouchScreen";
+	input_dev->phys = "input/ts";
+	input_dev->id.bustype = BUS_I2C;
+	input_dev->open = msg2638_input_open;
+	input_dev->close = msg2638_input_close;
+
+	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
+	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
+
+	touchscreen_parse_properties(input_dev, true, &msg2638->prop);
+	if (!msg2638->prop.max_x || !msg2638->prop.max_y) {
+		dev_err(dev, "touchscreen-size-x and/or touchscreen-size-y not set in properties\n");
+		return -EINVAL;
+	}
+
+	error = input_mt_init_slots(input_dev, MAX_SUPPORTED_FINGER_NUM,
+				    INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
+	if (error) {
+		dev_err(dev, "Failed to initialize MT slots: %d\n", error);
+		return error;
+	}
+
+	error = input_register_device(input_dev);
+	if (error) {
+		dev_err(dev, "Failed to register input device: %d\n", error);
+		return error;
+	}
+
+	return 0;
+}
+
+static int msg2638_ts_probe(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	struct msg2638_ts_data *msg2638;
+	int error;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		dev_err(dev, "Failed to assert adapter's support for plain I2C.\n");
+		return -ENXIO;
+	}
+
+	msg2638 = devm_kzalloc(dev, sizeof(*msg2638), GFP_KERNEL);
+	if (!msg2638)
+		return -ENOMEM;
+
+	msg2638->client = client;
+	i2c_set_clientdata(client, msg2638);
+
+	msg2638->supplies[0].supply = "vdd";
+	msg2638->supplies[1].supply = "vddio";
+	error = devm_regulator_bulk_get(dev, ARRAY_SIZE(msg2638->supplies),
+					msg2638->supplies);
+	if (error) {
+		dev_err(dev, "Failed to get regulators: %d\n", error);
+		return error;
+	}
+
+	msg2638->reset_gpiod = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(msg2638->reset_gpiod)) {
+		error = PTR_ERR(msg2638->reset_gpiod);
+		dev_err(dev, "Failed to request reset GPIO: %d\n", error);
+		return error;
+	}
+
+	error = msg2638_init_input_dev(msg2638);
+	if (error) {
+		dev_err(dev, "Failed to initialize input device: %d\n", error);
+		return error;
+	}
+
+	error = devm_request_threaded_irq(dev, client->irq,
+					  NULL, msg2638_ts_irq_handler,
+					  IRQF_ONESHOT | IRQF_NO_AUTOEN,
+					  client->name, msg2638);
+	if (error) {
+		dev_err(dev, "Failed to request IRQ: %d\n", error);
+		return error;
+	}
+
+	return 0;
+}
+
+static int __maybe_unused msg2638_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct msg2638_ts_data *msg2638 = i2c_get_clientdata(client);
+
+	mutex_lock(&msg2638->input_dev->mutex);
+
+	if (input_device_enabled(msg2638->input_dev))
+		msg2638_stop(msg2638);
+
+	mutex_unlock(&msg2638->input_dev->mutex);
+
+	return 0;
+}
+
+static int __maybe_unused msg2638_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct msg2638_ts_data *msg2638 = i2c_get_clientdata(client);
+	int ret = 0;
+
+	mutex_lock(&msg2638->input_dev->mutex);
+
+	if (input_device_enabled(msg2638->input_dev))
+		ret = msg2638_start(msg2638);
+
+	mutex_unlock(&msg2638->input_dev->mutex);
+
+	return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(msg2638_pm_ops, msg2638_suspend, msg2638_resume);
+
+static const struct of_device_id msg2638_of_match[] = {
+	{ .compatible = "mstar,msg2638" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, msg2638_of_match);
+
+static struct i2c_driver msg2638_ts_driver = {
+	.probe_new = msg2638_ts_probe,
+	.driver = {
+		.name = "MStar-TS",
+		.pm = &msg2638_pm_ops,
+		.of_match_table = msg2638_of_match,
+	},
+};
+module_i2c_driver(msg2638_ts_driver);
+
+MODULE_AUTHOR("Vincent Knecht <vincent.knecht@mailoo.org>");
+MODULE_DESCRIPTION("MStar MSG2638 touchscreen driver");
+MODULE_LICENSE("GPL v2");
-- 
cgit v1.2.3


From 42370681bd46d2162093d40eb453695495483733 Mon Sep 17 00:00:00 2001
From: Joe Hung <joe_hung@ilitek.com>
Date: Fri, 9 Apr 2021 15:24:31 -0700
Subject: Input: Add support for ILITEK Lego Series

Add support for ILITEK Lego series of touch devices.
Lego series includes ILITEK 213X/23XX/25XX.

Tested/passed with evaluation board with ILI2520/2322 IC.

Signed-off-by: Joe Hung <joe_hung@ilitek.com>
Link: https://lore.kernel.org/r/20210324122601.125873-2-joe_hung@ilitek.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/Kconfig         |  12 +
 drivers/input/touchscreen/Makefile        |   1 +
 drivers/input/touchscreen/ilitek_ts_i2c.c | 690 ++++++++++++++++++++++++++++++
 3 files changed, 703 insertions(+)
 create mode 100644 drivers/input/touchscreen/ilitek_ts_i2c.c

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index db1a4c78eec3..5f76192164c1 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -426,6 +426,18 @@ config TOUCHSCREEN_ILI210X
 	  To compile this driver as a module, choose M here: the
 	  module will be called ili210x.
 
+config TOUCHSCREEN_ILITEK
+	tristate "Ilitek I2C 213X/23XX/25XX/Lego Series Touch ICs"
+	depends on I2C
+	help
+	  Say Y here if you have touchscreen with ILITEK touch IC,
+	  it supports 213X/23XX/25XX and other Lego series.
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ilitek_ts_i2c.
+
 config TOUCHSCREEN_IPROC
 	tristate "IPROC touch panel driver support"
 	depends on ARCH_BCM_IPROC || COMPILE_TEST
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index ee1d3d3fd918..92267fe53cdb 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -46,6 +46,7 @@ obj-$(CONFIG_TOUCHSCREEN_FUJITSU)	+= fujitsu_ts.o
 obj-$(CONFIG_TOUCHSCREEN_GOODIX)	+= goodix.o
 obj-$(CONFIG_TOUCHSCREEN_HIDEEP)	+= hideep.o
 obj-$(CONFIG_TOUCHSCREEN_ILI210X)	+= ili210x.o
+obj-$(CONFIG_TOUCHSCREEN_ILITEK)	+= ilitek_ts_i2c.o
 obj-$(CONFIG_TOUCHSCREEN_IMX6UL_TSC)	+= imx6ul_tsc.o
 obj-$(CONFIG_TOUCHSCREEN_INEXIO)	+= inexio.o
 obj-$(CONFIG_TOUCHSCREEN_IPROC)		+= bcm_iproc_tsc.o
diff --git a/drivers/input/touchscreen/ilitek_ts_i2c.c b/drivers/input/touchscreen/ilitek_ts_i2c.c
new file mode 100644
index 000000000000..c5d259c76adc
--- /dev/null
+++ b/drivers/input/touchscreen/ilitek_ts_i2c.c
@@ -0,0 +1,690 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ILITEK Touch IC driver for 23XX, 25XX and Lego series
+ *
+ * Copyright (C) 2011 ILI Technology Corporation.
+ * Copyright (C) 2020 Luca Hsu <luca_hsu@ilitek.com>
+ * Copyright (C) 2021 Joe Hung <joe_hung@ilitek.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/errno.h>
+#include <linux/acpi.h>
+#include <linux/input/touchscreen.h>
+#include <asm/unaligned.h>
+
+
+#define ILITEK_TS_NAME					"ilitek_ts"
+#define BL_V1_8						0x108
+#define BL_V1_7						0x107
+#define BL_V1_6						0x106
+
+#define ILITEK_TP_CMD_GET_TP_RES			0x20
+#define ILITEK_TP_CMD_GET_SCRN_RES			0x21
+#define ILITEK_TP_CMD_SET_IC_SLEEP			0x30
+#define ILITEK_TP_CMD_SET_IC_WAKE			0x31
+#define ILITEK_TP_CMD_GET_FW_VER			0x40
+#define ILITEK_TP_CMD_GET_PRL_VER			0x42
+#define ILITEK_TP_CMD_GET_MCU_VER			0x61
+#define ILITEK_TP_CMD_GET_IC_MODE			0xC0
+
+#define REPORT_COUNT_ADDRESS				61
+#define ILITEK_SUPPORT_MAX_POINT			40
+
+struct ilitek_protocol_info {
+	u16 ver;
+	u8 ver_major;
+};
+
+struct ilitek_ts_data {
+	struct i2c_client		*client;
+	struct gpio_desc		*reset_gpio;
+	struct input_dev		*input_dev;
+	struct touchscreen_properties	prop;
+
+	const struct ilitek_protocol_map *ptl_cb_func;
+	struct ilitek_protocol_info	ptl;
+
+	char				product_id[30];
+	u16				mcu_ver;
+	u8				ic_mode;
+	u8				firmware_ver[8];
+
+	s32				reset_time;
+	s32				screen_max_x;
+	s32				screen_max_y;
+	s32				screen_min_x;
+	s32				screen_min_y;
+	s32				max_tp;
+};
+
+struct ilitek_protocol_map {
+	u16 cmd;
+	const char *name;
+	int (*func)(struct ilitek_ts_data *ts, u16 cmd, u8 *inbuf, u8 *outbuf);
+};
+
+enum ilitek_cmds {
+	/* common cmds */
+	GET_PTL_VER = 0,
+	GET_FW_VER,
+	GET_SCRN_RES,
+	GET_TP_RES,
+	GET_IC_MODE,
+	GET_MCU_VER,
+	SET_IC_SLEEP,
+	SET_IC_WAKE,
+
+	/* ALWAYS keep at the end */
+	MAX_CMD_CNT
+};
+
+/* ILITEK I2C R/W APIs */
+static int ilitek_i2c_write_and_read(struct ilitek_ts_data *ts,
+				     u8 *cmd, int write_len, int delay,
+				     u8 *data, int read_len)
+{
+	int error;
+	struct i2c_client *client = ts->client;
+	struct i2c_msg msgs[] = {
+		{
+			.addr = client->addr,
+			.flags = 0,
+			.len = write_len,
+			.buf = cmd,
+		},
+		{
+			.addr = client->addr,
+			.flags = I2C_M_RD,
+			.len = read_len,
+			.buf = data,
+		},
+	};
+
+	if (delay == 0 && write_len > 0 && read_len > 0) {
+		error = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+		if (error < 0)
+			return error;
+	} else {
+		if (write_len > 0) {
+			error = i2c_transfer(client->adapter, msgs, 1);
+			if (error < 0)
+				return error;
+		}
+		if (delay > 0)
+			mdelay(delay);
+
+		if (read_len > 0) {
+			error = i2c_transfer(client->adapter, msgs + 1, 1);
+			if (error < 0)
+				return error;
+		}
+	}
+
+	return 0;
+}
+
+/* ILITEK ISR APIs */
+static void ilitek_touch_down(struct ilitek_ts_data *ts, unsigned int id,
+			      unsigned int x, unsigned int y)
+{
+	struct input_dev *input = ts->input_dev;
+
+	input_mt_slot(input, id);
+	input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
+
+	touchscreen_report_pos(input, &ts->prop, x, y, true);
+}
+
+static int ilitek_process_and_report_v6(struct ilitek_ts_data *ts)
+{
+	int error = 0;
+	u8 buf[512];
+	int packet_len = 5;
+	int packet_max_point = 10;
+	int report_max_point;
+	int i, count;
+	struct input_dev *input = ts->input_dev;
+	struct device *dev = &ts->client->dev;
+	unsigned int x, y, status, id;
+
+	error = ilitek_i2c_write_and_read(ts, NULL, 0, 0, buf, 64);
+	if (error) {
+		dev_err(dev, "get touch info failed, err:%d\n", error);
+		goto err_sync_frame;
+	}
+
+	report_max_point = buf[REPORT_COUNT_ADDRESS];
+	if (report_max_point > ts->max_tp) {
+		dev_err(dev, "FW report max point:%d > panel info. max:%d\n",
+			report_max_point, ts->max_tp);
+		error = -EINVAL;
+		goto err_sync_frame;
+	}
+
+	count = DIV_ROUND_UP(report_max_point, packet_max_point);
+	for (i = 1; i < count; i++) {
+		error = ilitek_i2c_write_and_read(ts, NULL, 0, 0,
+						  buf + i * 64, 64);
+		if (error) {
+			dev_err(dev, "get touch info. failed, cnt:%d, err:%d\n",
+				count, error);
+			goto err_sync_frame;
+		}
+	}
+
+	for (i = 0; i < report_max_point; i++) {
+		status = buf[i * packet_len + 1] & 0x40;
+		if (!status)
+			continue;
+
+		id = buf[i * packet_len + 1] & 0x3F;
+
+		x = get_unaligned_le16(buf + i * packet_len + 2);
+		y = get_unaligned_le16(buf + i * packet_len + 4);
+
+		if (x > ts->screen_max_x || x < ts->screen_min_x ||
+		    y > ts->screen_max_y || y < ts->screen_min_y) {
+			dev_warn(dev, "invalid position, X[%d,%u,%d], Y[%d,%u,%d]\n",
+				 ts->screen_min_x, x, ts->screen_max_x,
+				 ts->screen_min_y, y, ts->screen_max_y);
+			continue;
+		}
+
+		ilitek_touch_down(ts, id, x, y);
+	}
+
+err_sync_frame:
+	input_mt_sync_frame(input);
+	input_sync(input);
+	return error;
+}
+
+/* APIs of cmds for ILITEK Touch IC */
+static int api_protocol_set_cmd(struct ilitek_ts_data *ts,
+				u16 idx, u8 *inbuf, u8 *outbuf)
+{
+	u16 cmd;
+	int error;
+
+	if (idx >= MAX_CMD_CNT)
+		return -EINVAL;
+
+	cmd = ts->ptl_cb_func[idx].cmd;
+	error = ts->ptl_cb_func[idx].func(ts, cmd, inbuf, outbuf);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+static int api_protocol_get_ptl_ver(struct ilitek_ts_data *ts,
+				    u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+	int error;
+	u8 buf[64];
+
+	buf[0] = cmd;
+	error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 3);
+	if (error)
+		return error;
+
+	ts->ptl.ver = get_unaligned_be16(outbuf);
+	ts->ptl.ver_major = outbuf[0];
+
+	return 0;
+}
+
+static int api_protocol_get_mcu_ver(struct ilitek_ts_data *ts,
+				    u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+	int error;
+	u8 buf[64];
+
+	buf[0] = cmd;
+	error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 32);
+	if (error)
+		return error;
+
+	ts->mcu_ver = get_unaligned_le16(outbuf);
+	memset(ts->product_id, 0, sizeof(ts->product_id));
+	memcpy(ts->product_id, outbuf + 6, 26);
+
+	return 0;
+}
+
+static int api_protocol_get_fw_ver(struct ilitek_ts_data *ts,
+				   u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+	int error;
+	u8 buf[64];
+
+	buf[0] = cmd;
+	error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 8);
+	if (error)
+		return error;
+
+	memcpy(ts->firmware_ver, outbuf, 8);
+
+	return 0;
+}
+
+static int api_protocol_get_scrn_res(struct ilitek_ts_data *ts,
+				     u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+	int error;
+	u8 buf[64];
+
+	buf[0] = cmd;
+	error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 8);
+	if (error)
+		return error;
+
+	ts->screen_min_x = get_unaligned_le16(outbuf);
+	ts->screen_min_y = get_unaligned_le16(outbuf + 2);
+	ts->screen_max_x = get_unaligned_le16(outbuf + 4);
+	ts->screen_max_y = get_unaligned_le16(outbuf + 6);
+
+	return 0;
+}
+
+static int api_protocol_get_tp_res(struct ilitek_ts_data *ts,
+				   u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+	int error;
+	u8 buf[64];
+
+	buf[0] = cmd;
+	error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 15);
+	if (error)
+		return error;
+
+	ts->max_tp = outbuf[8];
+	if (ts->max_tp > ILITEK_SUPPORT_MAX_POINT) {
+		dev_err(&ts->client->dev, "Invalid MAX_TP:%d from FW\n",
+			ts->max_tp);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int api_protocol_get_ic_mode(struct ilitek_ts_data *ts,
+				    u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+	int error;
+	u8 buf[64];
+
+	buf[0] = cmd;
+	error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 2);
+	if (error)
+		return error;
+
+	ts->ic_mode = outbuf[0];
+	return 0;
+}
+
+static int api_protocol_set_ic_sleep(struct ilitek_ts_data *ts,
+				     u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+	u8 buf[64];
+
+	buf[0] = cmd;
+	return ilitek_i2c_write_and_read(ts, buf, 1, 0, NULL, 0);
+}
+
+static int api_protocol_set_ic_wake(struct ilitek_ts_data *ts,
+				    u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+	u8 buf[64];
+
+	buf[0] = cmd;
+	return ilitek_i2c_write_and_read(ts, buf, 1, 0, NULL, 0);
+}
+
+static const struct ilitek_protocol_map ptl_func_map[] = {
+	/* common cmds */
+	[GET_PTL_VER] = {
+		ILITEK_TP_CMD_GET_PRL_VER, "GET_PTL_VER",
+		api_protocol_get_ptl_ver
+	},
+	[GET_FW_VER] = {
+		ILITEK_TP_CMD_GET_FW_VER, "GET_FW_VER",
+		api_protocol_get_fw_ver
+	},
+	[GET_SCRN_RES] = {
+		ILITEK_TP_CMD_GET_SCRN_RES, "GET_SCRN_RES",
+		api_protocol_get_scrn_res
+	},
+	[GET_TP_RES] = {
+		ILITEK_TP_CMD_GET_TP_RES, "GET_TP_RES",
+		api_protocol_get_tp_res
+	},
+	[GET_IC_MODE] = {
+		ILITEK_TP_CMD_GET_IC_MODE, "GET_IC_MODE",
+			   api_protocol_get_ic_mode
+	},
+	[GET_MCU_VER] = {
+		ILITEK_TP_CMD_GET_MCU_VER, "GET_MOD_VER",
+			   api_protocol_get_mcu_ver
+	},
+	[SET_IC_SLEEP] = {
+		ILITEK_TP_CMD_SET_IC_SLEEP, "SET_IC_SLEEP",
+		api_protocol_set_ic_sleep
+	},
+	[SET_IC_WAKE] = {
+		ILITEK_TP_CMD_SET_IC_WAKE, "SET_IC_WAKE",
+		api_protocol_set_ic_wake
+	},
+};
+
+/* Probe APIs */
+static void ilitek_reset(struct ilitek_ts_data *ts, int delay)
+{
+	if (ts->reset_gpio) {
+		gpiod_set_value(ts->reset_gpio, 1);
+		mdelay(10);
+		gpiod_set_value(ts->reset_gpio, 0);
+		mdelay(delay);
+	}
+}
+
+static int ilitek_protocol_init(struct ilitek_ts_data *ts)
+{
+	int error;
+	u8 outbuf[64];
+
+	ts->ptl_cb_func = ptl_func_map;
+	ts->reset_time = 600;
+
+	error = api_protocol_set_cmd(ts, GET_PTL_VER, NULL, outbuf);
+	if (error)
+		return error;
+
+	/* Protocol v3 is not support currently */
+	if (ts->ptl.ver_major == 0x3 ||
+	    ts->ptl.ver == BL_V1_6 ||
+	    ts->ptl.ver == BL_V1_7)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int ilitek_read_tp_info(struct ilitek_ts_data *ts, bool boot)
+{
+	u8 outbuf[256];
+	int error;
+
+	error = api_protocol_set_cmd(ts, GET_PTL_VER, NULL, outbuf);
+	if (error)
+		return error;
+
+	error = api_protocol_set_cmd(ts, GET_MCU_VER, NULL, outbuf);
+	if (error)
+		return error;
+
+	error = api_protocol_set_cmd(ts, GET_FW_VER, NULL, outbuf);
+	if (error)
+		return error;
+
+	if (boot) {
+		error = api_protocol_set_cmd(ts, GET_SCRN_RES, NULL,
+					     outbuf);
+		if (error)
+			return error;
+	}
+
+	error = api_protocol_set_cmd(ts, GET_TP_RES, NULL, outbuf);
+	if (error)
+		return error;
+
+	error = api_protocol_set_cmd(ts, GET_IC_MODE, NULL, outbuf);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+static int ilitek_input_dev_init(struct device *dev, struct ilitek_ts_data *ts)
+{
+	int error;
+	struct input_dev *input;
+
+	input = devm_input_allocate_device(dev);
+	if (!input)
+		return -ENOMEM;
+
+	ts->input_dev = input;
+	input->name = ILITEK_TS_NAME;
+	input->id.bustype = BUS_I2C;
+
+	__set_bit(INPUT_PROP_DIRECT, input->propbit);
+
+	input_set_abs_params(input, ABS_MT_POSITION_X,
+			     ts->screen_min_x, ts->screen_max_x, 0, 0);
+	input_set_abs_params(input, ABS_MT_POSITION_Y,
+			     ts->screen_min_y, ts->screen_max_y, 0, 0);
+
+	touchscreen_parse_properties(input, true, &ts->prop);
+
+	error = input_mt_init_slots(input, ts->max_tp,
+				    INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
+	if (error) {
+		dev_err(dev, "initialize MT slots failed, err:%d\n", error);
+		return error;
+	}
+
+	error = input_register_device(input);
+	if (error) {
+		dev_err(dev, "register input device failed, err:%d\n", error);
+		return error;
+	}
+
+	return 0;
+}
+
+static irqreturn_t ilitek_i2c_isr(int irq, void *dev_id)
+{
+	struct ilitek_ts_data *ts = dev_id;
+	int error;
+
+	error = ilitek_process_and_report_v6(ts);
+	if (error < 0) {
+		dev_err(&ts->client->dev, "[%s] err:%d\n", __func__, error);
+		return IRQ_NONE;
+	}
+
+	return IRQ_HANDLED;
+}
+
+static ssize_t firmware_version_show(struct device *dev,
+				     struct device_attribute *attr, char *buf)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct ilitek_ts_data *ts = i2c_get_clientdata(client);
+
+	return scnprintf(buf, PAGE_SIZE,
+			 "fw version: [%02X%02X.%02X%02X.%02X%02X.%02X%02X]\n",
+			 ts->firmware_ver[0], ts->firmware_ver[1],
+			 ts->firmware_ver[2], ts->firmware_ver[3],
+			 ts->firmware_ver[4], ts->firmware_ver[5],
+			 ts->firmware_ver[6], ts->firmware_ver[7]);
+}
+static DEVICE_ATTR_RO(firmware_version);
+
+static ssize_t product_id_show(struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct ilitek_ts_data *ts = i2c_get_clientdata(client);
+
+	return scnprintf(buf, PAGE_SIZE, "product id: [%04X], module: [%s]\n",
+			 ts->mcu_ver, ts->product_id);
+}
+static DEVICE_ATTR_RO(product_id);
+
+static struct attribute *ilitek_sysfs_attrs[] = {
+	&dev_attr_firmware_version.attr,
+	&dev_attr_product_id.attr,
+	NULL
+};
+
+static struct attribute_group ilitek_attrs_group = {
+	.attrs = ilitek_sysfs_attrs,
+};
+
+static int ilitek_ts_i2c_probe(struct i2c_client *client,
+			       const struct i2c_device_id *id)
+{
+	struct ilitek_ts_data *ts;
+	struct device *dev = &client->dev;
+	int error;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		dev_err(dev, "i2c check functionality failed\n");
+		return -ENXIO;
+	}
+
+	ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
+	if (!ts)
+		return -ENOMEM;
+
+	ts->client = client;
+	i2c_set_clientdata(client, ts);
+
+	ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(ts->reset_gpio)) {
+		error = PTR_ERR(ts->reset_gpio);
+		dev_err(dev, "request gpiod failed: %d", error);
+		return error;
+	}
+
+	ilitek_reset(ts, 1000);
+
+	error = ilitek_protocol_init(ts);
+	if (error) {
+		dev_err(dev, "protocol init failed: %d", error);
+		return error;
+	}
+
+	error = ilitek_read_tp_info(ts, true);
+	if (error) {
+		dev_err(dev, "read tp info failed: %d", error);
+		return error;
+	}
+
+	error = ilitek_input_dev_init(dev, ts);
+	if (error) {
+		dev_err(dev, "input dev init failed: %d", error);
+		return error;
+	}
+
+	error = devm_request_threaded_irq(dev, ts->client->irq,
+					  NULL, ilitek_i2c_isr, IRQF_ONESHOT,
+					  "ilitek_touch_irq", ts);
+	if (error) {
+		dev_err(dev, "request threaded irq failed: %d\n", error);
+		return error;
+	}
+
+	error = devm_device_add_group(dev, &ilitek_attrs_group);
+	if (error) {
+		dev_err(dev, "sysfs create group failed: %d\n", error);
+		return error;
+	}
+
+	return 0;
+}
+
+static int __maybe_unused ilitek_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct ilitek_ts_data *ts = i2c_get_clientdata(client);
+	int error;
+
+	disable_irq(client->irq);
+
+	if (!device_may_wakeup(dev)) {
+		error = api_protocol_set_cmd(ts, SET_IC_SLEEP, NULL, NULL);
+		if (error)
+			return error;
+	}
+
+	return 0;
+}
+
+static int __maybe_unused ilitek_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct ilitek_ts_data *ts = i2c_get_clientdata(client);
+	int error;
+
+	if (!device_may_wakeup(dev)) {
+		error = api_protocol_set_cmd(ts, SET_IC_WAKE, NULL, NULL);
+		if (error)
+			return error;
+
+		ilitek_reset(ts, ts->reset_time);
+	}
+
+	enable_irq(client->irq);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(ilitek_pm_ops, ilitek_suspend, ilitek_resume);
+
+static const struct i2c_device_id ilitek_ts_i2c_id[] = {
+	{ ILITEK_TS_NAME, 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, ilitek_ts_i2c_id);
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id ilitekts_acpi_id[] = {
+	{ "ILTK0001", 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, ilitekts_acpi_id);
+#endif
+
+#ifdef CONFIG_OF
+static const struct of_device_id ilitek_ts_i2c_match[] = {
+	{.compatible = "ilitek,ili2130",},
+	{.compatible = "ilitek,ili2131",},
+	{.compatible = "ilitek,ili2132",},
+	{.compatible = "ilitek,ili2316",},
+	{.compatible = "ilitek,ili2322",},
+	{.compatible = "ilitek,ili2323",},
+	{.compatible = "ilitek,ili2326",},
+	{.compatible = "ilitek,ili2520",},
+	{.compatible = "ilitek,ili2521",},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, ilitek_ts_i2c_match);
+#endif
+
+static struct i2c_driver ilitek_ts_i2c_driver = {
+	.driver = {
+		.name = ILITEK_TS_NAME,
+		.pm = &ilitek_pm_ops,
+		.of_match_table = of_match_ptr(ilitek_ts_i2c_match),
+		.acpi_match_table = ACPI_PTR(ilitekts_acpi_id),
+	},
+	.probe = ilitek_ts_i2c_probe,
+	.id_table = ilitek_ts_i2c_id,
+};
+module_i2c_driver(ilitek_ts_i2c_driver);
+
+MODULE_AUTHOR("ILITEK");
+MODULE_DESCRIPTION("ILITEK I2C Touchscreen Driver");
+MODULE_LICENSE("GPL");
-- 
cgit v1.2.3


From 53fefdd1d3a3403d8c44e28898d1031d8763b913 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Fri, 9 Apr 2021 23:04:35 -0700
Subject: Input: mms114 - support MMS136

The Melfas MMS136 is similar to the other MMS variants but
has event packages of 6 bytes rather than 8 as the others.

The define is named FINGER_EVENT_SZ in the vendor drivers
so I renamed it from MMS*_PACKET_SZ to MMS*_EVENT_SZ.

After this patch, the touchscreen on the Samsung GT-I8530
works fine with PostmarketOS.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210404232619.3092682-1-linus.walleij@linaro.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/mms114.c | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/mms114.c b/drivers/input/touchscreen/mms114.c
index 7043f57ea2dd..0efd1a1bb192 100644
--- a/drivers/input/touchscreen/mms114.c
+++ b/drivers/input/touchscreen/mms114.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-// Melfas MMS114/MMS152 touchscreen device driver
+// Melfas MMS114/MMS136/MMS152 touchscreen device driver
 //
 // Copyright (c) 2012 Samsung Electronics Co., Ltd.
 // Author: Joonyoung Shim <jy0922.shim@samsung.com>
@@ -44,7 +44,8 @@
 #define MMS114_MAX_AREA			0xff
 
 #define MMS114_MAX_TOUCH		10
-#define MMS114_PACKET_NUM		8
+#define MMS114_EVENT_SIZE		8
+#define MMS136_EVENT_SIZE		6
 
 /* Touch type */
 #define MMS114_TYPE_NONE		0
@@ -53,6 +54,7 @@
 
 enum mms_type {
 	TYPE_MMS114	= 114,
+	TYPE_MMS136	= 136,
 	TYPE_MMS152	= 152,
 	TYPE_MMS345L	= 345,
 };
@@ -209,7 +211,11 @@ static irqreturn_t mms114_interrupt(int irq, void *dev_id)
 	if (packet_size <= 0)
 		goto out;
 
-	touch_size = packet_size / MMS114_PACKET_NUM;
+	/* MMS136 has slightly different event size */
+	if (data->type == TYPE_MMS136)
+		touch_size = packet_size / MMS136_EVENT_SIZE;
+	else
+		touch_size = packet_size / MMS114_EVENT_SIZE;
 
 	error = __mms114_read_reg(data, MMS114_INFORMATION, packet_size,
 			(u8 *)touch);
@@ -275,6 +281,7 @@ static int mms114_get_version(struct mms114_data *data)
 		break;
 
 	case TYPE_MMS114:
+	case TYPE_MMS136:
 		error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
 		if (error)
 			return error;
@@ -297,8 +304,8 @@ static int mms114_setup_regs(struct mms114_data *data)
 	if (error < 0)
 		return error;
 
-	/* Only MMS114 has configuration and power on registers */
-	if (data->type != TYPE_MMS114)
+	/* Only MMS114 and MMS136 have configuration and power on registers */
+	if (data->type != TYPE_MMS114 && data->type != TYPE_MMS136)
 		return 0;
 
 	error = mms114_set_active(data, true);
@@ -480,7 +487,7 @@ static int mms114_probe(struct i2c_client *client,
 				     0, data->props.max_y, 0, 0);
 	}
 
-	if (data->type == TYPE_MMS114) {
+	if (data->type == TYPE_MMS114 || data->type == TYPE_MMS136) {
 		/*
 		 * The firmware handles movement and pressure fuzz, so
 		 * don't duplicate that in software.
@@ -604,6 +611,9 @@ static const struct of_device_id mms114_dt_match[] = {
 	{
 		.compatible = "melfas,mms114",
 		.data = (void *)TYPE_MMS114,
+	}, {
+		.compatible = "melfas,mms136",
+		.data = (void *)TYPE_MMS136,
 	}, {
 		.compatible = "melfas,mms152",
 		.data = (void *)TYPE_MMS152,
-- 
cgit v1.2.3


From 236798a1a95fa0c3f923d92d570ff656d2d8e8f5 Mon Sep 17 00:00:00 2001
From: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Date: Fri, 9 Apr 2021 23:28:32 -0700
Subject: Input: apbps2 - remove useless variable
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fix the following gcc warning:

drivers/input/serio/apbps2.c:106:16: warning: variable ‘tmp’ set but not
used [-Wunused-but-set-variable].

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Link: https://lore.kernel.org/r/1617958859-64707-1-git-send-email-jiapeng.chong@linux.alibaba.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/serio/apbps2.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/serio/apbps2.c b/drivers/input/serio/apbps2.c
index 594ac4e6f8ea..974d7bfae0a0 100644
--- a/drivers/input/serio/apbps2.c
+++ b/drivers/input/serio/apbps2.c
@@ -103,7 +103,6 @@ static int apbps2_open(struct serio *io)
 {
 	struct apbps2_priv *priv = io->port_data;
 	int limit;
-	unsigned long tmp;
 
 	/* clear error flags */
 	iowrite32be(0, &priv->regs->status);
@@ -111,7 +110,7 @@ static int apbps2_open(struct serio *io)
 	/* Clear old data if available (unlikely) */
 	limit = 1024;
 	while ((ioread32be(&priv->regs->status) & APBPS2_STATUS_DR) && --limit)
-		tmp = ioread32be(&priv->regs->data);
+		ioread32be(&priv->regs->data);
 
 	/* Enable reciever and it's interrupt */
 	iowrite32be(APBPS2_CTRL_RE | APBPS2_CTRL_RI, &priv->regs->ctrl);
-- 
cgit v1.2.3


From 39841136766651e487458d9ee1660fe86aa697f3 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Sat, 10 Apr 2021 00:31:12 -0700
Subject: Input: cyttsp - error message on boot mode exit error

Provide a proper error message when attempting to exit boot loader mode
and failing, which is something that happened to me.

Reviewed-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210408131153.3446138-5-linus.walleij@linaro.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/cyttsp_core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
index c59aa6b8d257..4dc387659e2a 100644
--- a/drivers/input/touchscreen/cyttsp_core.c
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -408,8 +408,10 @@ static int cyttsp_power_on(struct cyttsp *ts)
 	if (GET_BOOTLOADERMODE(ts->bl_data.bl_status) &&
 	    IS_VALID_APP(ts->bl_data.bl_status)) {
 		error = cyttsp_exit_bl_mode(ts);
-		if (error)
+		if (error) {
+			dev_err(ts->dev, "failed to exit bootloader mode\n");
 			return error;
+		}
 	}
 
 	if (GET_HSTMODE(ts->bl_data.bl_file) != CY_OPERATE_MODE ||
-- 
cgit v1.2.3


From c61ac36fd52cb3015acd93af5da01f8f8350051f Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Sat, 10 Apr 2021 00:31:52 -0700
Subject: Input: cyttsp - reduce reset pulse timings

The data sheet for CY8CTMA340 specifies that the reset pulse shall be at
least 1 ms. Specify 1-2 ms with usleep_range() to cut some slack for the
scheduler.

Curiously the datasheet does not specify how long we have to wait after a
hard reset until the chip is up, but I have found a vendor tree (Samsung
GT-S7710) that has code for this touch screen and there this is set to 5
ms so I use this with the same 1 ms fuzz.

Reviewed-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210408131153.3446138-6-linus.walleij@linaro.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/cyttsp_core.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
index 4dc387659e2a..42e353f11976 100644
--- a/drivers/input/touchscreen/cyttsp_core.c
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -229,10 +229,16 @@ static int cyttsp_set_sysinfo_regs(struct cyttsp *ts)
 static void cyttsp_hard_reset(struct cyttsp *ts)
 {
 	if (ts->reset_gpio) {
+		/*
+		 * According to the CY8CTMA340 datasheet page 21, the external
+		 * reset pulse width should be >= 1 ms. The datasheet does not
+		 * specify how long we have to wait after reset but a vendor
+		 * tree specifies 5 ms here.
+		 */
 		gpiod_set_value_cansleep(ts->reset_gpio, 1);
-		msleep(CY_DELAY_DFLT);
+		usleep_range(1000, 2000);
 		gpiod_set_value_cansleep(ts->reset_gpio, 0);
-		msleep(CY_DELAY_DFLT);
+		usleep_range(5000, 6000);
 	}
 }
 
-- 
cgit v1.2.3


From 0bffa508d1365794b7688b9a2d1ad5af63434b58 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Sat, 10 Apr 2021 00:32:46 -0700
Subject: Input: cyttsp - drop the phys path

When I test to use the CY8CTMA340 with PostmarketOS I don't have any
problem whatsoever in dropping this phys path, it finds and uses the
touchscreen just as well. I suppose it is because userspace is using
modern input libraries.

I challenge the maintainers to point out a valid and still used
userspace that actually need this. I say we drop it.

Reviewed-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210408131153.3446138-7-linus.walleij@linaro.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/cyttsp_core.c | 2 --
 drivers/input/touchscreen/cyttsp_core.h | 1 -
 2 files changed, 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
index 42e353f11976..b0477f55fb79 100644
--- a/drivers/input/touchscreen/cyttsp_core.c
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -640,10 +640,8 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
 		return ERR_PTR(error);
 
 	init_completion(&ts->bl_ready);
-	snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev));
 
 	input_dev->name = "Cypress TTSP TouchScreen";
-	input_dev->phys = ts->phys;
 	input_dev->id.bustype = bus_ops->bustype;
 	input_dev->dev.parent = ts->dev;
 
diff --git a/drivers/input/touchscreen/cyttsp_core.h b/drivers/input/touchscreen/cyttsp_core.h
index 8c651336ac12..9bc4fe7e6ac5 100644
--- a/drivers/input/touchscreen/cyttsp_core.h
+++ b/drivers/input/touchscreen/cyttsp_core.h
@@ -114,7 +114,6 @@ struct cyttsp {
 	struct device *dev;
 	int irq;
 	struct input_dev *input;
-	char phys[32];
 	const struct cyttsp_bus_ops *bus_ops;
 	struct cyttsp_bootloader_data bl_data;
 	struct cyttsp_sysinfo_data sysinfo_data;
-- 
cgit v1.2.3


From ddfe7e1ce3d5ce5ae0b25d107ba9d26fe8a4923b Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Sat, 10 Apr 2021 00:33:46 -0700
Subject: Input: cyttsp - set abs params for ABS_MT_TOUCH_MAJOR

The driver is certainly reporting pressure in cyttsp_report_tchdata()
with input_report_abs(input, ABS_MT_TOUCH_MAJOR, tch->z); so we should
also advertise this capability.

Reviewed-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210408131153.3446138-8-linus.walleij@linaro.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/cyttsp_core.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
index b0477f55fb79..3d605f4cbed9 100644
--- a/drivers/input/touchscreen/cyttsp_core.c
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -652,6 +652,9 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
 
 	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
 	input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
+	/* One byte for width 0..255 so this is the limit */
+	input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
+
 	touchscreen_parse_properties(input_dev, true, NULL);
 
 	error = input_mt_init_slots(input_dev, CY_MAX_ID, 0);
-- 
cgit v1.2.3


From dadf1fd8807e61b1b1744836c96f48eb9ad56f5b Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Sat, 10 Apr 2021 00:34:58 -0700
Subject: Input: cyttsp - flag the device properly

This device is certainly a very simple touchscreen so
we set INPUT_MT_DIRECT.

Reviewed-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210408131153.3446138-9-linus.walleij@linaro.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/cyttsp_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
index 3d605f4cbed9..106dd4962785 100644
--- a/drivers/input/touchscreen/cyttsp_core.c
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -657,7 +657,7 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
 
 	touchscreen_parse_properties(input_dev, true, NULL);
 
-	error = input_mt_init_slots(input_dev, CY_MAX_ID, 0);
+	error = input_mt_init_slots(input_dev, CY_MAX_ID, INPUT_MT_DIRECT);
 	if (error) {
 		dev_err(dev, "Unable to init MT slots.\n");
 		return ERR_PTR(error);
-- 
cgit v1.2.3


From ee1bf567c90df6fd04a3c31acb0995cb13f62c48 Mon Sep 17 00:00:00 2001
From: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Date: Thu, 1 Apr 2021 17:53:36 +0800
Subject: dmaengine: qcom_hidma: remove unused code

Fix the following clang warning:

drivers/dma/qcom/hidma.c:94:20: warning: unused function 'to_hidma_desc'
[-Wunused-function].

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Link: https://lore.kernel.org/r/1617270816-36400-1-git-send-email-jiapeng.chong@linux.alibaba.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/qcom/hidma.c | 6 ------
 1 file changed, 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/qcom/hidma.c b/drivers/dma/qcom/hidma.c
index 6c0f9eb8ecc6..23d64489d25f 100644
--- a/drivers/dma/qcom/hidma.c
+++ b/drivers/dma/qcom/hidma.c
@@ -90,12 +90,6 @@ static inline struct hidma_chan *to_hidma_chan(struct dma_chan *dmach)
 	return container_of(dmach, struct hidma_chan, chan);
 }
 
-static inline
-struct hidma_desc *to_hidma_desc(struct dma_async_tx_descriptor *t)
-{
-	return container_of(t, struct hidma_desc, desc);
-}
-
 static void hidma_free(struct hidma_dev *dmadev)
 {
 	INIT_LIST_HEAD(&dmadev->ddev.channels);
-- 
cgit v1.2.3


From 1b6216a61e1d5b6683f2d3362ff76d183e66c29f Mon Sep 17 00:00:00 2001
From: Hao Fang <fanghao11@huawei.com>
Date: Thu, 1 Apr 2021 19:50:20 +0800
Subject: dmaengine: k3dma: use the correct HiSilicon copyright

s/Hisilicon/HiSilicon/g.
It should use capital S, according to the official website.

Signed-off-by: Hao Fang <fanghao11@huawei.com>
Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Link: https://lore.kernel.org/r/1617277820-26971-1-git-send-email-fanghao11@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/k3dma.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/k3dma.c b/drivers/dma/k3dma.c
index d0b2e601e3e5..ecdaada95120 100644
--- a/drivers/dma/k3dma.c
+++ b/drivers/dma/k3dma.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2013 - 2015 Linaro Ltd.
- * Copyright (c) 2013 Hisilicon Limited.
+ * Copyright (c) 2013 HiSilicon Limited.
  */
 #include <linux/sched.h>
 #include <linux/device.h>
@@ -1039,6 +1039,6 @@ static struct platform_driver k3_pdma_driver = {
 
 module_platform_driver(k3_pdma_driver);
 
-MODULE_DESCRIPTION("Hisilicon k3 DMA Driver");
+MODULE_DESCRIPTION("HiSilicon k3 DMA Driver");
 MODULE_ALIAS("platform:k3dma");
 MODULE_LICENSE("GPL v2");
-- 
cgit v1.2.3


From 80c253bd7ffbb40ae550c8ae5bed9126b8f99f96 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Fri, 26 Mar 2021 19:09:09 +0000
Subject: PCI: endpoint: Remove redundant initialization of pointer dev
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The pointer dev is being initialized with a value that is
never read and it is being updated later with a new value.  The
initialization is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Link: https://lore.kernel.org/r/20210326190909.622369-1-colin.king@canonical.com
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
---
 drivers/pci/endpoint/pci-epf-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c
index 7646c8660d42..e9289d10f822 100644
--- a/drivers/pci/endpoint/pci-epf-core.c
+++ b/drivers/pci/endpoint/pci-epf-core.c
@@ -113,7 +113,7 @@ EXPORT_SYMBOL_GPL(pci_epf_bind);
 void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar,
 			enum pci_epc_interface_type type)
 {
-	struct device *dev = epf->epc->dev.parent;
+	struct device *dev;
 	struct pci_epf_bar *epf_bar;
 	struct pci_epc *epc;
 
-- 
cgit v1.2.3


From acaef7981a218813e3617edb9c01837808de063c Mon Sep 17 00:00:00 2001
From: Yang Yingliang <yangyingliang@huawei.com>
Date: Wed, 31 Mar 2021 16:40:12 +0800
Subject: PCI: endpoint: Fix missing destroy_workqueue()

Add the missing destroy_workqueue() before return from
pci_epf_test_init() in the error handling case and add
destroy_workqueue() in pci_epf_test_exit().

Link: https://lore.kernel.org/r/20210331084012.2091010-1-yangyingliang@huawei.com
Fixes: 349e7a85b25fa ("PCI: endpoint: functions: Add an EP function to test PCI")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
---
 drivers/pci/endpoint/functions/pci-epf-test.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index bc35b3566be6..f9760e73d568 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -925,6 +925,7 @@ static int __init pci_epf_test_init(void)
 
 	ret = pci_epf_register_driver(&test_driver);
 	if (ret) {
+		destroy_workqueue(kpcitest_workqueue);
 		pr_err("Failed to register pci epf test driver --> %d\n", ret);
 		return ret;
 	}
@@ -935,6 +936,8 @@ module_init(pci_epf_test_init);
 
 static void __exit pci_epf_test_exit(void)
 {
+	if (kpcitest_workqueue)
+		destroy_workqueue(kpcitest_workqueue);
 	pci_epf_unregister_driver(&test_driver);
 }
 module_exit(pci_epf_test_exit);
-- 
cgit v1.2.3


From 87db343f809d611405c45cbb691657e7df5c047d Mon Sep 17 00:00:00 2001
From: Qiheng Lin <linqiheng@huawei.com>
Date: Wed, 31 Mar 2021 16:59:38 +0800
Subject: PCI: mediatek: Add missing MODULE_DEVICE_TABLE

This patch adds missing MODULE_DEVICE_TABLE definition which generates
correct modalias for automatic loading of this driver when it is built
as an external module.

Link: https://lore.kernel.org/r/20210331085938.3115-1-linqiheng@huawei.com
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Qiheng Lin <linqiheng@huawei.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
---
 drivers/pci/controller/pcie-mediatek.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
index 8af04848e0f9..ddbd2f8b3226 100644
--- a/drivers/pci/controller/pcie-mediatek.c
+++ b/drivers/pci/controller/pcie-mediatek.c
@@ -1210,6 +1210,7 @@ static const struct of_device_id mtk_pcie_ids[] = {
 	{ .compatible = "mediatek,mt7629-pcie", .data = &mtk_pcie_soc_mt7629 },
 	{},
 };
+MODULE_DEVICE_TABLE(of, mtk_pcie_ids);
 
 static struct platform_driver mtk_pcie_driver = {
 	.probe = mtk_pcie_probe,
-- 
cgit v1.2.3


From 6d1f2803cb6b414c2e45fa64d1fdad6b581e1e88 Mon Sep 17 00:00:00 2001
From: Suman Anna <s-anna@ti.com>
Date: Wed, 7 Apr 2021 10:56:39 -0500
Subject: remoteproc: pru: Fixup interrupt-parent logic for fw events

The PRU firmware interrupt mapping logic in pru_handle_intrmap() uses
of_irq_find_parent() with PRU device node to get a handle to the PRUSS
Interrupt Controller at present. This logic however requires that the
PRU nodes always define a interrupt-parent property. This property is
neither a required/defined property as per the PRU remoteproc binding,
nor is relevant from a DT node point of view without any associated
interrupts. The current logic finds a wrong interrupt controller and
fails to perform proper mapping without any interrupt-parent property
in the PRU nodes.

Fix this logic to always find and use the sibling interrupt controller.
Also, while at this, fix the acquired interrupt controller device node
reference properly.

Fixes: c75c9fdac66e ("remoteproc: pru: Add support for PRU specific interrupt configuration")
Signed-off-by: Suman Anna <s-anna@ti.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210407155641.5501-2-s-anna@ti.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/pru_rproc.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
index d6086f90e809..b8b3c1921fe6 100644
--- a/drivers/remoteproc/pru_rproc.c
+++ b/drivers/remoteproc/pru_rproc.c
@@ -284,7 +284,7 @@ static int pru_handle_intrmap(struct rproc *rproc)
 	struct pru_rproc *pru = rproc->priv;
 	struct pru_irq_rsc *rsc = pru->pru_interrupt_map;
 	struct irq_fwspec fwspec;
-	struct device_node *irq_parent;
+	struct device_node *parent, *irq_parent;
 	int i, ret = 0;
 
 	/* not having pru_interrupt_map is not an error */
@@ -312,9 +312,16 @@ static int pru_handle_intrmap(struct rproc *rproc)
 
 	/*
 	 * parse and fill in system event to interrupt channel and
-	 * channel-to-host mapping
+	 * channel-to-host mapping. The interrupt controller to be used
+	 * for these mappings for a given PRU remoteproc is always its
+	 * corresponding sibling PRUSS INTC node.
 	 */
-	irq_parent = of_irq_find_parent(pru->dev->of_node);
+	parent = of_get_parent(dev_of_node(pru->dev));
+	if (!parent)
+		return -ENODEV;
+
+	irq_parent = of_get_child_by_name(parent, "interrupt-controller");
+	of_node_put(parent);
 	if (!irq_parent) {
 		kfree(pru->mapped_irq);
 		return -ENODEV;
@@ -337,11 +344,13 @@ static int pru_handle_intrmap(struct rproc *rproc)
 			goto map_fail;
 		}
 	}
+	of_node_put(irq_parent);
 
 	return ret;
 
 map_fail:
 	pru_dispose_irq_mapping(pru);
+	of_node_put(irq_parent);
 
 	return ret;
 }
-- 
cgit v1.2.3


From 1fe72bcfac087dba5ab52778e0646ed9e145cd32 Mon Sep 17 00:00:00 2001
From: Suman Anna <s-anna@ti.com>
Date: Wed, 7 Apr 2021 10:56:40 -0500
Subject: remoteproc: pru: Fix wrong success return value for fw events

The irq_create_fwspec_mapping() returns a proper virq value on success
and 0 upon any failure. The pru_handle_intrmap() treats this as an error
and disposes all firmware event mappings correctly, but is returning
this incorrect value as is, letting the pru_rproc_start() interpret it
as a success and boot the PRU.

Fix this by returning an error value back upon any such failure. While
at this, revise the error trace to print some meaningful info about the
failed event.

Fixes: c75c9fdac66e ("remoteproc: pru: Add support for PRU specific interrupt configuration")
Signed-off-by: Suman Anna <s-anna@ti.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210407155641.5501-3-s-anna@ti.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/pru_rproc.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
index b8b3c1921fe6..ac6348cc094f 100644
--- a/drivers/remoteproc/pru_rproc.c
+++ b/drivers/remoteproc/pru_rproc.c
@@ -339,8 +339,10 @@ static int pru_handle_intrmap(struct rproc *rproc)
 
 		pru->mapped_irq[i] = irq_create_fwspec_mapping(&fwspec);
 		if (!pru->mapped_irq[i]) {
-			dev_err(dev, "failed to get virq\n");
-			ret = pru->mapped_irq[i];
+			dev_err(dev, "failed to get virq for fw mapping %d: event %d chnl %d host %d\n",
+				i, fwspec.param[0], fwspec.param[1],
+				fwspec.param[2]);
+			ret = -EINVAL;
 			goto map_fail;
 		}
 	}
-- 
cgit v1.2.3


From 880a66e026fbe6a17cd59fe0ee942bbad62a6c26 Mon Sep 17 00:00:00 2001
From: Suman Anna <s-anna@ti.com>
Date: Wed, 7 Apr 2021 10:56:41 -0500
Subject: remoteproc: pru: Fix and cleanup firmware interrupt mapping logic

The PRU firmware interrupt mappings are configured and unconfigured in
.start() and .stop() callbacks respectively using the variables 'evt_count'
and a 'mapped_irq' pointer. These variables are modified only during these
callbacks but are not re-initialized/reset properly during unwind or
failure paths. These stale values caused a kernel crash while stopping a
PRU remoteproc running a different firmware with no events on a subsequent
run after a previous run that was running a firmware with events.

Fix this crash by ensuring that the evt_count is 0 and the mapped_irq
pointer is set to NULL in pru_dispose_irq_mapping(). Also, reset these
variables properly during any failures in the .start() callback. While
at this, the pru_dispose_irq_mapping() callsites are all made to look
the same, moving any conditional logic to inside the function.

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Fixes: c75c9fdac66e ("remoteproc: pru: Add support for PRU specific interrupt configuration")
Reported-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>
Link: https://lore.kernel.org/r/20210407155641.5501-4-s-anna@ti.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/pru_rproc.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
index ac6348cc094f..b13ff4283232 100644
--- a/drivers/remoteproc/pru_rproc.c
+++ b/drivers/remoteproc/pru_rproc.c
@@ -266,12 +266,17 @@ static void pru_rproc_create_debug_entries(struct rproc *rproc)
 
 static void pru_dispose_irq_mapping(struct pru_rproc *pru)
 {
-	while (pru->evt_count--) {
+	if (!pru->mapped_irq)
+		return;
+
+	while (pru->evt_count) {
+		pru->evt_count--;
 		if (pru->mapped_irq[pru->evt_count] > 0)
 			irq_dispose_mapping(pru->mapped_irq[pru->evt_count]);
 	}
 
 	kfree(pru->mapped_irq);
+	pru->mapped_irq = NULL;
 }
 
 /*
@@ -307,8 +312,10 @@ static int pru_handle_intrmap(struct rproc *rproc)
 	pru->evt_count = rsc->num_evts;
 	pru->mapped_irq = kcalloc(pru->evt_count, sizeof(unsigned int),
 				  GFP_KERNEL);
-	if (!pru->mapped_irq)
+	if (!pru->mapped_irq) {
+		pru->evt_count = 0;
 		return -ENOMEM;
+	}
 
 	/*
 	 * parse and fill in system event to interrupt channel and
@@ -317,13 +324,19 @@ static int pru_handle_intrmap(struct rproc *rproc)
 	 * corresponding sibling PRUSS INTC node.
 	 */
 	parent = of_get_parent(dev_of_node(pru->dev));
-	if (!parent)
+	if (!parent) {
+		kfree(pru->mapped_irq);
+		pru->mapped_irq = NULL;
+		pru->evt_count = 0;
 		return -ENODEV;
+	}
 
 	irq_parent = of_get_child_by_name(parent, "interrupt-controller");
 	of_node_put(parent);
 	if (!irq_parent) {
 		kfree(pru->mapped_irq);
+		pru->mapped_irq = NULL;
+		pru->evt_count = 0;
 		return -ENODEV;
 	}
 
@@ -398,8 +411,7 @@ static int pru_rproc_stop(struct rproc *rproc)
 	pru_control_write_reg(pru, PRU_CTRL_CTRL, val);
 
 	/* dispose irq mapping - new firmware can provide new mapping */
-	if (pru->mapped_irq)
-		pru_dispose_irq_mapping(pru);
+	pru_dispose_irq_mapping(pru);
 
 	return 0;
 }
-- 
cgit v1.2.3


From 859fd2418b4ba00bba56263b8abc7f54f4a7260f Mon Sep 17 00:00:00 2001
From: Wei Yongjun <weiyongjun1@huawei.com>
Date: Fri, 19 Mar 2021 09:41:00 +0000
Subject: remoteproc: qcom: wcss: Fix return value check in
 q6v5_wcss_init_mmio()

In case of error, the function devm_ioremap() returns NULL pointer
not ERR_PTR(). The IS_ERR() test in the return value check should
be replaced with NULL test.

Fixes: 0af65b9b915e ("remoteproc: qcom: wcss: Add non pas wcss Q6 support for QCS404")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20210319094100.4185044-1-weiyongjun1@huawei.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/qcom_q6v5_wcss.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c
index 71ec1a451e35..6f7d940d4431 100644
--- a/drivers/remoteproc/qcom_q6v5_wcss.c
+++ b/drivers/remoteproc/qcom_q6v5_wcss.c
@@ -829,8 +829,8 @@ static int q6v5_wcss_init_mmio(struct q6v5_wcss *wcss,
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qdsp6");
 	wcss->reg_base = devm_ioremap(&pdev->dev, res->start,
 				      resource_size(res));
-	if (IS_ERR(wcss->reg_base))
-		return PTR_ERR(wcss->reg_base);
+	if (!wcss->reg_base)
+		return -ENOMEM;
 
 	if (wcss->version == WCSS_IPQ8074) {
 		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rmb");
-- 
cgit v1.2.3


From aa2f62cf211a0985c14fd78a17d55296769698d6 Mon Sep 17 00:00:00 2001
From: Giulio Benetti <giulio.benetti@benettiengineering.com>
Date: Tue, 13 Apr 2021 18:46:53 -0700
Subject: Input: add driver for the Hycon HY46XX touchpanel series

This patch adds support for Hycon HY46XX.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Link: https://lore.kernel.org/r/20210413144446.2277817-4-giulio.benetti@benettiengineering.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 MAINTAINERS                              |   1 +
 drivers/input/touchscreen/Kconfig        |  11 +
 drivers/input/touchscreen/Makefile       |   1 +
 drivers/input/touchscreen/hycon-hy46xx.c | 591 +++++++++++++++++++++++++++++++
 4 files changed, 604 insertions(+)
 create mode 100644 drivers/input/touchscreen/hycon-hy46xx.c

(limited to 'drivers')

diff --git a/MAINTAINERS b/MAINTAINERS
index a27c8efaa681..e2a4d7cb38a2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8249,6 +8249,7 @@ M:	Giulio Benetti <giulio.benetti@benettiengineering.com>
 L:	linux-input@vger.kernel.org
 S:	Maintained
 F:	Documentation/devicetree/bindings/input/touchscreen/hycon,hy46xx.yaml
+F:	drivers/input/touchscreen/hy46xx.c
 
 HYGON PROCESSOR SUPPORT
 M:	Pu Wen <puwen@hygon.cn>
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 5f76192164c1..ad454cd2855a 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -411,6 +411,17 @@ config TOUCHSCREEN_HIDEEP
 	  To compile this driver as a module, choose M here : the
 	  module will be called hideep_ts.
 
+config TOUCHSCREEN_HYCON_HY46XX
+	tristate "Hycon hy46xx touchscreen support"
+	depends on I2C
+	help
+	  Say Y here if you have a touchscreen using Hycon hy46xx
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called hycon-hy46xx.
+
 config TOUCHSCREEN_ILI210X
 	tristate "Ilitek ILI210X based touchscreen"
 	depends on I2C
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 92267fe53cdb..7d34100f7f22 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_TOUCHSCREEN_DA9052)	+= da9052_tsi.o
 obj-$(CONFIG_TOUCHSCREEN_DYNAPRO)	+= dynapro.o
 obj-$(CONFIG_TOUCHSCREEN_EDT_FT5X06)	+= edt-ft5x06.o
 obj-$(CONFIG_TOUCHSCREEN_HAMPSHIRE)	+= hampshire.o
+obj-$(CONFIG_TOUCHSCREEN_HYCON_HY46XX)	+= hycon-hy46xx.o
 obj-$(CONFIG_TOUCHSCREEN_GUNZE)		+= gunze.o
 obj-$(CONFIG_TOUCHSCREEN_EETI)		+= eeti_ts.o
 obj-$(CONFIG_TOUCHSCREEN_EKTF2127)	+= ektf2127.o
diff --git a/drivers/input/touchscreen/hycon-hy46xx.c b/drivers/input/touchscreen/hycon-hy46xx.c
new file mode 100644
index 000000000000..891d0430083e
--- /dev/null
+++ b/drivers/input/touchscreen/hycon-hy46xx.c
@@ -0,0 +1,591 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/input/touchscreen.h>
+#include <linux/irq.h>
+#include <linux/regulator/consumer.h>
+#include <linux/regmap.h>
+
+#include <asm/unaligned.h>
+
+#define HY46XX_CHKSUM_CODE		0x1
+#define HY46XX_FINGER_NUM		0x2
+#define HY46XX_CHKSUM_LEN		0x7
+#define HY46XX_THRESHOLD		0x80
+#define HY46XX_GLOVE_EN			0x84
+#define HY46XX_REPORT_SPEED		0x88
+#define HY46XX_PWR_NOISE_EN		0x89
+#define HY46XX_FILTER_DATA		0x8A
+#define HY46XX_GAIN			0x92
+#define HY46XX_EDGE_OFFSET		0x93
+#define HY46XX_RX_NR_USED		0x94
+#define HY46XX_TX_NR_USED		0x95
+#define HY46XX_PWR_MODE			0xA5
+#define HY46XX_FW_VERSION		0xA6
+#define HY46XX_LIB_VERSION		0xA7
+#define HY46XX_TP_INFO			0xA8
+#define HY46XX_TP_CHIP_ID		0xA9
+#define HY46XX_BOOT_VER			0xB0
+
+#define HY46XX_TPLEN			0x6
+#define HY46XX_REPORT_PKT_LEN		0x44
+
+#define HY46XX_MAX_SUPPORTED_POINTS	11
+
+#define TOUCH_EVENT_DOWN		0x00
+#define TOUCH_EVENT_UP			0x01
+#define TOUCH_EVENT_CONTACT		0x02
+#define TOUCH_EVENT_RESERVED		0x03
+
+struct hycon_hy46xx_data {
+	struct i2c_client *client;
+	struct input_dev *input;
+	struct touchscreen_properties prop;
+	struct regulator *vcc;
+
+	struct gpio_desc *reset_gpio;
+
+	struct mutex mutex;
+	struct regmap *regmap;
+
+	int threshold;
+	bool glove_enable;
+	int report_speed;
+	bool noise_filter_enable;
+	int filter_data;
+	int gain;
+	int edge_offset;
+	int rx_number_used;
+	int tx_number_used;
+	int power_mode;
+	int fw_version;
+	int lib_version;
+	int tp_information;
+	int tp_chip_id;
+	int bootloader_version;
+};
+
+static const struct regmap_config hycon_hy46xx_i2c_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static bool hycon_hy46xx_check_checksum(struct hycon_hy46xx_data *tsdata, u8 *buf)
+{
+	u8 chksum = 0;
+	int i;
+
+	for (i = 2; i < buf[HY46XX_CHKSUM_LEN]; i++)
+		chksum += buf[i];
+
+	if (chksum == buf[HY46XX_CHKSUM_CODE])
+		return true;
+
+	dev_err_ratelimited(&tsdata->client->dev,
+			    "checksum error: 0x%02x expected, got 0x%02x\n",
+			    chksum, buf[HY46XX_CHKSUM_CODE]);
+
+	return false;
+}
+
+static irqreturn_t hycon_hy46xx_isr(int irq, void *dev_id)
+{
+	struct hycon_hy46xx_data *tsdata = dev_id;
+	struct device *dev = &tsdata->client->dev;
+	u8 rdbuf[HY46XX_REPORT_PKT_LEN];
+	int i, x, y, id;
+	int error;
+
+	memset(rdbuf, 0, sizeof(rdbuf));
+
+	error = regmap_bulk_read(tsdata->regmap, 0, rdbuf, sizeof(rdbuf));
+	if (error) {
+		dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
+				    error);
+		goto out;
+	}
+
+	if (!hycon_hy46xx_check_checksum(tsdata, rdbuf))
+		goto out;
+
+	for (i = 0; i < HY46XX_MAX_SUPPORTED_POINTS; i++) {
+		u8 *buf = &rdbuf[3 + (HY46XX_TPLEN * i)];
+		int type = buf[0] >> 6;
+
+		if (type == TOUCH_EVENT_RESERVED)
+			continue;
+
+		x = get_unaligned_be16(buf) & 0x0fff;
+		y = get_unaligned_be16(buf + 2) & 0x0fff;
+
+		id = buf[2] >> 4;
+
+		input_mt_slot(tsdata->input, id);
+		if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER,
+					       type != TOUCH_EVENT_UP))
+			touchscreen_report_pos(tsdata->input, &tsdata->prop,
+					       x, y, true);
+	}
+
+	input_mt_report_pointer_emulation(tsdata->input, false);
+	input_sync(tsdata->input);
+
+out:
+	return IRQ_HANDLED;
+}
+
+struct hycon_hy46xx_attribute {
+	struct device_attribute dattr;
+	size_t field_offset;
+	u8 address;
+	u8 limit_low;
+	u8 limit_high;
+};
+
+#define HYCON_ATTR_U8(_field, _mode, _address, _limit_low, _limit_high)	\
+	struct hycon_hy46xx_attribute hycon_hy46xx_attr_##_field = {		\
+		.dattr = __ATTR(_field, _mode,				\
+				hycon_hy46xx_setting_show,			\
+				hycon_hy46xx_setting_store),			\
+		.field_offset = offsetof(struct hycon_hy46xx_data, _field),	\
+		.address = _address,					\
+		.limit_low = _limit_low,				\
+		.limit_high = _limit_high,				\
+	}
+
+#define HYCON_ATTR_BOOL(_field, _mode, _address)			\
+	struct hycon_hy46xx_attribute hycon_hy46xx_attr_##_field = {		\
+		.dattr = __ATTR(_field, _mode,				\
+				hycon_hy46xx_setting_show,			\
+				hycon_hy46xx_setting_store),			\
+		.field_offset = offsetof(struct hycon_hy46xx_data, _field),	\
+		.address = _address,					\
+		.limit_low = false,					\
+		.limit_high = true,					\
+	}
+
+static ssize_t hycon_hy46xx_setting_show(struct device *dev,
+				   struct device_attribute *dattr, char *buf)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct hycon_hy46xx_data *tsdata = i2c_get_clientdata(client);
+	struct hycon_hy46xx_attribute *attr =
+			container_of(dattr, struct hycon_hy46xx_attribute, dattr);
+	u8 *field = (u8 *)tsdata + attr->field_offset;
+	size_t count = 0;
+	int error = 0;
+	int val;
+
+	mutex_lock(&tsdata->mutex);
+
+	error = regmap_read(tsdata->regmap, attr->address, &val);
+	if (error < 0) {
+		dev_err(&tsdata->client->dev,
+			"Failed to fetch attribute %s, error %d\n",
+			dattr->attr.name, error);
+		goto out;
+	}
+
+	if (val != *field) {
+		dev_warn(&tsdata->client->dev,
+			 "%s: read (%d) and stored value (%d) differ\n",
+			 dattr->attr.name, val, *field);
+		*field = val;
+	}
+
+	count = scnprintf(buf, PAGE_SIZE, "%d\n", val);
+
+out:
+	mutex_unlock(&tsdata->mutex);
+	return error ?: count;
+}
+
+static ssize_t hycon_hy46xx_setting_store(struct device *dev,
+					struct device_attribute *dattr,
+					const char *buf, size_t count)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct hycon_hy46xx_data *tsdata = i2c_get_clientdata(client);
+	struct hycon_hy46xx_attribute *attr =
+			container_of(dattr, struct hycon_hy46xx_attribute, dattr);
+	u8 *field = (u8 *)tsdata + attr->field_offset;
+	unsigned int val;
+	int error;
+
+	mutex_lock(&tsdata->mutex);
+
+	error = kstrtouint(buf, 0, &val);
+	if (error)
+		goto out;
+
+	if (val < attr->limit_low || val > attr->limit_high) {
+		error = -ERANGE;
+		goto out;
+	}
+
+	error = regmap_write(tsdata->regmap, attr->address, val);
+	if (error < 0) {
+		dev_err(&tsdata->client->dev,
+			"Failed to update attribute %s, error: %d\n",
+			dattr->attr.name, error);
+		goto out;
+	}
+	*field = val;
+
+out:
+	mutex_unlock(&tsdata->mutex);
+	return error ?: count;
+}
+
+static HYCON_ATTR_U8(threshold, 0644, HY46XX_THRESHOLD, 0, 255);
+static HYCON_ATTR_BOOL(glove_enable, 0644, HY46XX_GLOVE_EN);
+static HYCON_ATTR_U8(report_speed, 0644, HY46XX_REPORT_SPEED, 0, 255);
+static HYCON_ATTR_BOOL(noise_filter_enable, 0644, HY46XX_PWR_NOISE_EN);
+static HYCON_ATTR_U8(filter_data, 0644, HY46XX_FILTER_DATA, 0, 5);
+static HYCON_ATTR_U8(gain, 0644, HY46XX_GAIN, 0, 5);
+static HYCON_ATTR_U8(edge_offset, 0644, HY46XX_EDGE_OFFSET, 0, 5);
+static HYCON_ATTR_U8(fw_version, 0444, HY46XX_FW_VERSION, 0, 255);
+static HYCON_ATTR_U8(lib_version, 0444, HY46XX_LIB_VERSION, 0, 255);
+static HYCON_ATTR_U8(tp_information, 0444, HY46XX_TP_INFO, 0, 255);
+static HYCON_ATTR_U8(tp_chip_id, 0444, HY46XX_TP_CHIP_ID, 0, 255);
+static HYCON_ATTR_U8(bootloader_version, 0444, HY46XX_BOOT_VER, 0, 255);
+
+static struct attribute *hycon_hy46xx_attrs[] = {
+	&hycon_hy46xx_attr_threshold.dattr.attr,
+	&hycon_hy46xx_attr_glove_enable.dattr.attr,
+	&hycon_hy46xx_attr_report_speed.dattr.attr,
+	&hycon_hy46xx_attr_noise_filter_enable.dattr.attr,
+	&hycon_hy46xx_attr_filter_data.dattr.attr,
+	&hycon_hy46xx_attr_gain.dattr.attr,
+	&hycon_hy46xx_attr_edge_offset.dattr.attr,
+	&hycon_hy46xx_attr_fw_version.dattr.attr,
+	&hycon_hy46xx_attr_lib_version.dattr.attr,
+	&hycon_hy46xx_attr_tp_information.dattr.attr,
+	&hycon_hy46xx_attr_tp_chip_id.dattr.attr,
+	&hycon_hy46xx_attr_bootloader_version.dattr.attr,
+	NULL
+};
+
+static const struct attribute_group hycon_hy46xx_attr_group = {
+	.attrs = hycon_hy46xx_attrs,
+};
+
+static void hycon_hy46xx_get_defaults(struct device *dev, struct hycon_hy46xx_data *tsdata)
+{
+	bool val_bool;
+	int error;
+	u32 val;
+
+	error = device_property_read_u32(dev, "hycon,threshold", &val);
+	if (!error) {
+		error = regmap_write(tsdata->regmap, HY46XX_THRESHOLD, val);
+		if (error < 0)
+			goto out;
+
+		tsdata->threshold = val;
+	}
+
+	val_bool = device_property_read_bool(dev, "hycon,glove-enable");
+	error = regmap_write(tsdata->regmap, HY46XX_GLOVE_EN, val_bool);
+	if (error < 0)
+		goto out;
+	tsdata->glove_enable = val_bool;
+
+	error = device_property_read_u32(dev, "hycon,report-speed-hz", &val);
+	if (!error) {
+		error = regmap_write(tsdata->regmap, HY46XX_REPORT_SPEED, val);
+		if (error < 0)
+			goto out;
+
+		tsdata->report_speed = val;
+	}
+
+	val_bool = device_property_read_bool(dev, "hycon,noise-filter-enable");
+	error = regmap_write(tsdata->regmap, HY46XX_PWR_NOISE_EN, val_bool);
+	if (error < 0)
+		goto out;
+	tsdata->noise_filter_enable = val_bool;
+
+	error = device_property_read_u32(dev, "hycon,filter-data", &val);
+	if (!error) {
+		error = regmap_write(tsdata->regmap, HY46XX_FILTER_DATA, val);
+		if (error < 0)
+			goto out;
+
+		tsdata->filter_data = val;
+	}
+
+	error = device_property_read_u32(dev, "hycon,gain", &val);
+	if (!error) {
+		error = regmap_write(tsdata->regmap, HY46XX_GAIN, val);
+		if (error < 0)
+			goto out;
+
+		tsdata->gain = val;
+	}
+
+	error = device_property_read_u32(dev, "hycon,edge-offset", &val);
+	if (!error) {
+		error = regmap_write(tsdata->regmap, HY46XX_EDGE_OFFSET, val);
+		if (error < 0)
+			goto out;
+
+		tsdata->edge_offset = val;
+	}
+
+	return;
+out:
+	dev_err(&tsdata->client->dev, "Failed to set default settings");
+}
+
+static void hycon_hy46xx_get_parameters(struct hycon_hy46xx_data *tsdata)
+{
+	int error;
+	u32 val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_THRESHOLD, &val);
+	if (error < 0)
+		goto out;
+	tsdata->threshold = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_GLOVE_EN, &val);
+	if (error < 0)
+		goto out;
+	tsdata->glove_enable = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_REPORT_SPEED, &val);
+	if (error < 0)
+		goto out;
+	tsdata->report_speed = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_PWR_NOISE_EN, &val);
+	if (error < 0)
+		goto out;
+	tsdata->noise_filter_enable = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_FILTER_DATA, &val);
+	if (error < 0)
+		goto out;
+	tsdata->filter_data = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_GAIN, &val);
+	if (error < 0)
+		goto out;
+	tsdata->gain = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_EDGE_OFFSET, &val);
+	if (error < 0)
+		goto out;
+	tsdata->edge_offset = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_RX_NR_USED, &val);
+	if (error < 0)
+		goto out;
+	tsdata->rx_number_used = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_TX_NR_USED, &val);
+	if (error < 0)
+		goto out;
+	tsdata->tx_number_used = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_PWR_MODE, &val);
+	if (error < 0)
+		goto out;
+	tsdata->power_mode = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_FW_VERSION, &val);
+	if (error < 0)
+		goto out;
+	tsdata->fw_version = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_LIB_VERSION, &val);
+	if (error < 0)
+		goto out;
+	tsdata->lib_version = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_TP_INFO, &val);
+	if (error < 0)
+		goto out;
+	tsdata->tp_information = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_TP_CHIP_ID, &val);
+	if (error < 0)
+		goto out;
+	tsdata->tp_chip_id = val;
+
+	error = regmap_read(tsdata->regmap, HY46XX_BOOT_VER, &val);
+	if (error < 0)
+		goto out;
+	tsdata->bootloader_version = val;
+
+	return;
+out:
+	dev_err(&tsdata->client->dev, "Failed to read default settings");
+}
+
+static void hycon_hy46xx_disable_regulator(void *arg)
+{
+	struct hycon_hy46xx_data *data = arg;
+
+	regulator_disable(data->vcc);
+}
+
+static int hycon_hy46xx_probe(struct i2c_client *client,
+					 const struct i2c_device_id *id)
+{
+	struct hycon_hy46xx_data *tsdata;
+	struct input_dev *input;
+	int error;
+
+	dev_dbg(&client->dev, "probing for HYCON HY46XX I2C\n");
+
+	tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
+	if (!tsdata)
+		return -ENOMEM;
+
+	tsdata->vcc = devm_regulator_get(&client->dev, "vcc");
+	if (IS_ERR(tsdata->vcc)) {
+		error = PTR_ERR(tsdata->vcc);
+		if (error != -EPROBE_DEFER)
+			dev_err(&client->dev,
+				"failed to request regulator: %d\n", error);
+		return error;
+	}
+
+	error = regulator_enable(tsdata->vcc);
+	if (error < 0) {
+		dev_err(&client->dev, "failed to enable vcc: %d\n", error);
+		return error;
+	}
+
+	error = devm_add_action_or_reset(&client->dev,
+					 hycon_hy46xx_disable_regulator,
+					 tsdata);
+	if (error)
+		return error;
+
+	tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev,
+						     "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(tsdata->reset_gpio)) {
+		error = PTR_ERR(tsdata->reset_gpio);
+		dev_err(&client->dev,
+			"Failed to request GPIO reset pin, error %d\n", error);
+		return error;
+	}
+
+	if (tsdata->reset_gpio) {
+		usleep_range(5000, 6000);
+		gpiod_set_value_cansleep(tsdata->reset_gpio, 1);
+		usleep_range(5000, 6000);
+		gpiod_set_value_cansleep(tsdata->reset_gpio, 0);
+		msleep(1000);
+	}
+
+	input = devm_input_allocate_device(&client->dev);
+	if (!input) {
+		dev_err(&client->dev, "failed to allocate input device.\n");
+		return -ENOMEM;
+	}
+
+	mutex_init(&tsdata->mutex);
+	tsdata->client = client;
+	tsdata->input = input;
+
+	tsdata->regmap = devm_regmap_init_i2c(client,
+					      &hycon_hy46xx_i2c_regmap_config);
+	if (IS_ERR(tsdata->regmap)) {
+		dev_err(&client->dev, "regmap allocation failed\n");
+		return PTR_ERR(tsdata->regmap);
+	}
+
+	hycon_hy46xx_get_defaults(&client->dev, tsdata);
+	hycon_hy46xx_get_parameters(tsdata);
+
+	input->name = "Hycon Capacitive Touch";
+	input->id.bustype = BUS_I2C;
+	input->dev.parent = &client->dev;
+
+	input_set_abs_params(input, ABS_MT_POSITION_X, 0, -1, 0, 0);
+	input_set_abs_params(input, ABS_MT_POSITION_Y, 0, -1, 0, 0);
+
+	touchscreen_parse_properties(input, true, &tsdata->prop);
+
+	error = input_mt_init_slots(input, HY46XX_MAX_SUPPORTED_POINTS,
+				    INPUT_MT_DIRECT);
+	if (error) {
+		dev_err(&client->dev, "Unable to init MT slots.\n");
+		return error;
+	}
+
+	i2c_set_clientdata(client, tsdata);
+
+	error = devm_request_threaded_irq(&client->dev, client->irq,
+					  NULL, hycon_hy46xx_isr, IRQF_ONESHOT,
+					  client->name, tsdata);
+	if (error) {
+		dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
+		return error;
+	}
+
+	error = devm_device_add_group(&client->dev, &hycon_hy46xx_attr_group);
+	if (error)
+		return error;
+
+	error = input_register_device(input);
+	if (error)
+		return error;
+
+	dev_dbg(&client->dev,
+		"HYCON HY46XX initialized: IRQ %d, Reset pin %d.\n",
+		client->irq,
+		tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1);
+
+	return 0;
+}
+
+static const struct i2c_device_id hycon_hy46xx_id[] = {
+	{ .name = "hy4613" },
+	{ .name = "hy4614" },
+	{ .name = "hy4621" },
+	{ .name = "hy4623" },
+	{ .name = "hy4633" },
+	{ .name = "hy4635" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, hycon_hy46xx_id);
+
+static const struct of_device_id hycon_hy46xx_of_match[] = {
+	{ .compatible = "hycon,hy4613" },
+	{ .compatible = "hycon,hy4614" },
+	{ .compatible = "hycon,hy4621" },
+	{ .compatible = "hycon,hy4623" },
+	{ .compatible = "hycon,hy4633" },
+	{ .compatible = "hycon,hy4635" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, hycon_hy46xx_of_match);
+
+static struct i2c_driver hycon_hy46xx_driver = {
+	.driver = {
+		.name = "hycon_hy46xx",
+		.of_match_table = hycon_hy46xx_of_match,
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
+	},
+	.id_table = hycon_hy46xx_id,
+	.probe    = hycon_hy46xx_probe,
+};
+
+module_i2c_driver(hycon_hy46xx_driver);
+
+MODULE_AUTHOR("Giulio Benetti <giulio.benetti@benettiengineering.com>");
+MODULE_DESCRIPTION("HYCON HY46XX I2C Touchscreen Driver");
+MODULE_LICENSE("GPL v2");
-- 
cgit v1.2.3


From 3fdba9d27cc68a4d561da80bfecd4f73239b9a86 Mon Sep 17 00:00:00 2001
From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Date: Thu, 8 Apr 2021 22:42:11 +0530
Subject: remoteproc: qcom: pas: Add modem support for SDX55

Add remoteproc support for Hexagon modem found on the Qualcomm SDX55
platform.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210408171211.92141-1-manivannan.sadhasivam@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/qcom_q6v5_pas.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'drivers')

diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
index ef85b5511dc9..b921fc26cd04 100644
--- a/drivers/remoteproc/qcom_q6v5_pas.c
+++ b/drivers/remoteproc/qcom_q6v5_pas.c
@@ -785,6 +785,22 @@ static const struct adsp_data wcss_resource_init = {
 	.ssctl_id = 0x12,
 };
 
+static const struct adsp_data sdx55_mpss_resource = {
+	.crash_reason_smem = 421,
+	.firmware_name = "modem.mdt",
+	.pas_id = 4,
+	.has_aggre2_clk = false,
+	.auto_boot = true,
+	.proxy_pd_names = (char*[]){
+		"cx",
+		"mss",
+		NULL
+	},
+	.ssr_name = "mpss",
+	.sysmon_name = "modem",
+	.ssctl_id = 0x22,
+};
+
 static const struct of_device_id adsp_of_match[] = {
 	{ .compatible = "qcom,msm8974-adsp-pil", .data = &adsp_resource_init},
 	{ .compatible = "qcom,msm8996-adsp-pil", .data = &adsp_resource_init},
@@ -797,6 +813,7 @@ static const struct of_device_id adsp_of_match[] = {
 	{ .compatible = "qcom,sc7180-mpss-pas", .data = &mpss_resource_init},
 	{ .compatible = "qcom,sdm845-adsp-pas", .data = &adsp_resource_init},
 	{ .compatible = "qcom,sdm845-cdsp-pas", .data = &cdsp_resource_init},
+	{ .compatible = "qcom,sdx55-mpss-pas", .data = &sdx55_mpss_resource},
 	{ .compatible = "qcom,sm8150-adsp-pas", .data = &sm8150_adsp_resource},
 	{ .compatible = "qcom,sm8150-cdsp-pas", .data = &sm8150_cdsp_resource},
 	{ .compatible = "qcom,sm8150-mpss-pas", .data = &mpss_resource_init},
-- 
cgit v1.2.3


From ca0e89406ba18e9ba98d28413b50469f631bb583 Mon Sep 17 00:00:00 2001
From: Wei Yongjun <weiyongjun1@huawei.com>
Date: Fri, 26 Mar 2021 02:47:41 +0000
Subject: remoteproc: qcom: wcss: Fix wrong pointer passed to PTR_ERR()

PTR_ERR should access the value just tested by IS_ERR, otherwise
the wrong error code will be returned.

This commit fix it by return 'ret' directly.

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 0af65b9b915e ("remoteproc: qcom: wcss: Add non pas wcss Q6 support for QCS404")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20210326024741.841267-1-weiyongjun1@huawei.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/qcom_q6v5_wcss.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c
index 6f7d940d4431..eab911dabb0b 100644
--- a/drivers/remoteproc/qcom_q6v5_wcss.c
+++ b/drivers/remoteproc/qcom_q6v5_wcss.c
@@ -972,7 +972,7 @@ static int q6v5_wcss_init_clock(struct q6v5_wcss *wcss)
 		ret = PTR_ERR(wcss->qdsp6ss_axim_cbcr);
 		if (ret != -EPROBE_DEFER)
 			dev_err(wcss->dev, "failed to get axim cbcr clk\n");
-		return PTR_ERR(wcss->qdsp6ss_abhm_cbcr);
+		return ret;
 	}
 
 	wcss->lcc_bcr_sleep = devm_clk_get(wcss->dev, "lcc_bcr_sleep");
-- 
cgit v1.2.3


From 6353da47ee0082286e4d4a7dc4b38d4ee5ea4cb4 Mon Sep 17 00:00:00 2001
From: Junlin Yang <yangjunlin@yulong.com>
Date: Thu, 8 Apr 2021 22:33:22 +0800
Subject: remoteproc: qcom: wcss: Remove unnecessary PTR_ERR()

Remove unnecessary PTR_ERR(), it has been assigned to ret before,
so return ret directly.

Signed-off-by: Junlin Yang <yangjunlin@yulong.com>
Link: https://lore.kernel.org/r/20210408143322.1647-1-angkery@163.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/qcom_q6v5_wcss.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c
index eab911dabb0b..20d50ec7eff1 100644
--- a/drivers/remoteproc/qcom_q6v5_wcss.c
+++ b/drivers/remoteproc/qcom_q6v5_wcss.c
@@ -913,7 +913,7 @@ static int q6v5_wcss_init_clock(struct q6v5_wcss *wcss)
 		ret = PTR_ERR(wcss->gcc_abhs_cbcr);
 		if (ret != -EPROBE_DEFER)
 			dev_err(wcss->dev, "failed to get gcc abhs clock");
-		return PTR_ERR(wcss->gcc_abhs_cbcr);
+		return ret;
 	}
 
 	wcss->gcc_axim_cbcr = devm_clk_get(wcss->dev, "gcc_axim_cbcr");
@@ -921,7 +921,7 @@ static int q6v5_wcss_init_clock(struct q6v5_wcss *wcss)
 		ret = PTR_ERR(wcss->gcc_axim_cbcr);
 		if (ret != -EPROBE_DEFER)
 			dev_err(wcss->dev, "failed to get gcc axim clock\n");
-		return PTR_ERR(wcss->gcc_axim_cbcr);
+		return ret;
 	}
 
 	wcss->ahbfabric_cbcr_clk = devm_clk_get(wcss->dev,
@@ -930,7 +930,7 @@ static int q6v5_wcss_init_clock(struct q6v5_wcss *wcss)
 		ret = PTR_ERR(wcss->ahbfabric_cbcr_clk);
 		if (ret != -EPROBE_DEFER)
 			dev_err(wcss->dev, "failed to get ahbfabric clock\n");
-		return PTR_ERR(wcss->ahbfabric_cbcr_clk);
+		return ret;
 	}
 
 	wcss->lcc_csr_cbcr = devm_clk_get(wcss->dev, "tcsr_lcc_cbc");
@@ -938,7 +938,7 @@ static int q6v5_wcss_init_clock(struct q6v5_wcss *wcss)
 		ret = PTR_ERR(wcss->lcc_csr_cbcr);
 		if (ret != -EPROBE_DEFER)
 			dev_err(wcss->dev, "failed to get csr cbcr clk\n");
-		return PTR_ERR(wcss->lcc_csr_cbcr);
+		return ret;
 	}
 
 	wcss->ahbs_cbcr = devm_clk_get(wcss->dev,
@@ -947,7 +947,7 @@ static int q6v5_wcss_init_clock(struct q6v5_wcss *wcss)
 		ret = PTR_ERR(wcss->ahbs_cbcr);
 		if (ret != -EPROBE_DEFER)
 			dev_err(wcss->dev, "failed to get ahbs_cbcr clk\n");
-		return PTR_ERR(wcss->ahbs_cbcr);
+		return ret;
 	}
 
 	wcss->tcm_slave_cbcr = devm_clk_get(wcss->dev,
@@ -956,7 +956,7 @@ static int q6v5_wcss_init_clock(struct q6v5_wcss *wcss)
 		ret = PTR_ERR(wcss->tcm_slave_cbcr);
 		if (ret != -EPROBE_DEFER)
 			dev_err(wcss->dev, "failed to get tcm cbcr clk\n");
-		return PTR_ERR(wcss->tcm_slave_cbcr);
+		return ret;
 	}
 
 	wcss->qdsp6ss_abhm_cbcr = devm_clk_get(wcss->dev, "lcc_abhm_cbc");
@@ -964,7 +964,7 @@ static int q6v5_wcss_init_clock(struct q6v5_wcss *wcss)
 		ret = PTR_ERR(wcss->qdsp6ss_abhm_cbcr);
 		if (ret != -EPROBE_DEFER)
 			dev_err(wcss->dev, "failed to get abhm cbcr clk\n");
-		return PTR_ERR(wcss->qdsp6ss_abhm_cbcr);
+		return ret;
 	}
 
 	wcss->qdsp6ss_axim_cbcr = devm_clk_get(wcss->dev, "lcc_axim_cbc");
@@ -980,7 +980,7 @@ static int q6v5_wcss_init_clock(struct q6v5_wcss *wcss)
 		ret = PTR_ERR(wcss->lcc_bcr_sleep);
 		if (ret != -EPROBE_DEFER)
 			dev_err(wcss->dev, "failed to get bcr cbcr clk\n");
-		return PTR_ERR(wcss->lcc_bcr_sleep);
+		return ret;
 	}
 
 	return 0;
-- 
cgit v1.2.3


From 889cb0d43d18ed348971e49378ed6a63e3a4745e Mon Sep 17 00:00:00 2001
From: Wei Yongjun <weiyongjun1@huawei.com>
Date: Wed, 31 Mar 2021 12:27:09 +0000
Subject: remoteproc: imx_rproc: fix build error without CONFIG_MAILBOX

Fix build error when CONFIG_MAILBOX is not set:

arm-linux-gnueabi-ld: drivers/remoteproc/imx_rproc.o: in function `imx_rproc_kick':
imx_rproc.c:(.text+0x328): undefined reference to `mbox_send_message'
arm-linux-gnueabi-ld: drivers/remoteproc/imx_rproc.o: in function `imx_rproc_probe':
imx_rproc.c:(.text+0x52c): undefined reference to `mbox_request_channel_byname'
arm-linux-gnueabi-ld: imx_rproc.c:(.text+0x548): undefined reference to `mbox_request_channel_byname'
arm-linux-gnueabi-ld: imx_rproc.c:(.text+0x76c): undefined reference to `mbox_free_channel'
arm-linux-gnueabi-ld: imx_rproc.c:(.text+0x774): undefined reference to `mbox_free_channel'
arm-linux-gnueabi-ld: imx_rproc.c:(.text+0x7c4): undefined reference to `mbox_free_channel'
arm-linux-gnueabi-ld: drivers/remoteproc/imx_rproc.o: in function `imx_rproc_remove':
imx_rproc.c:(.text+0x86c): undefined reference to `mbox_free_channel'
arm-linux-gnueabi-ld: imx_rproc.c:(.text+0x874): undefined reference to `mbox_free_channel'
make: *** [Makefile:1292: vmlinux] Error 1

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Fixes: 2df7062002d0 ("remoteproc: imx_proc: enable virtio/mailbox")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20210331122709.3935521-1-weiyongjun1@huawei.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/Kconfig | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 7cf3d1b40c55..e68fcedc999c 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -26,6 +26,7 @@ config REMOTEPROC_CDEV
 config IMX_REMOTEPROC
 	tristate "i.MX remoteproc support"
 	depends on ARCH_MXC
+	select MAILBOX
 	help
 	  Say y here to support iMX's remote processors via the remote
 	  processor framework.
-- 
cgit v1.2.3


From 6e962bfe56b99843ab716dc8a9438039476c99e2 Mon Sep 17 00:00:00 2001
From: Peng Fan <peng.fan@nxp.com>
Date: Thu, 8 Apr 2021 09:44:46 +0800
Subject: remoteproc: imx_rproc: add missing of_node_put

After of_parse_phandle, we need of_node_put to decrease the refcount
of the device_node.

Reported-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/1617846289-13496-2-git-send-email-peng.fan@oss.nxp.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/imx_rproc.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'drivers')

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 6d3207ccbaef..077413319f58 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -459,6 +459,8 @@ static int imx_rproc_addr_init(struct imx_rproc *priv,
 			return err;
 		}
 
+		of_node_put(node);
+
 		if (b >= IMX7D_RPROC_MEM_MAX)
 			break;
 
-- 
cgit v1.2.3


From f638a19775ae60ae919ff604fdc04362ff4f817f Mon Sep 17 00:00:00 2001
From: Peng Fan <peng.fan@nxp.com>
Date: Thu, 8 Apr 2021 09:44:47 +0800
Subject: remoteproc: imx_rproc: enlarge IMX7D_RPROC_MEM_MAX

8 is not enough when we need more, such as resource table for remote cores
that booted before Linux Kernel, so enlarge IMX7D_RPROC_MEM_MAX to 32.
And also rename it to IMX_RPROC_MEM_MAX which make more sense.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/1617846289-13496-3-git-send-email-peng.fan@oss.nxp.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/imx_rproc.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 077413319f58..b05aae0ad7a2 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -48,7 +48,7 @@
 					 | IMX6SX_SW_M4C_NON_SCLR_RST \
 					 | IMX6SX_SW_M4C_RST)
 
-#define IMX7D_RPROC_MEM_MAX		8
+#define IMX_RPROC_MEM_MAX		32
 
 /**
  * struct imx_rproc_mem - slim internal memory structure
@@ -88,7 +88,7 @@ struct imx_rproc {
 	struct regmap			*regmap;
 	struct rproc			*rproc;
 	const struct imx_rproc_dcfg	*dcfg;
-	struct imx_rproc_mem		mem[IMX7D_RPROC_MEM_MAX];
+	struct imx_rproc_mem		mem[IMX_RPROC_MEM_MAX];
 	struct clk			*clk;
 	struct mbox_client		cl;
 	struct mbox_chan		*tx_ch;
@@ -272,7 +272,7 @@ static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *i
 	if (imx_rproc_da_to_sys(priv, da, len, &sys))
 		return NULL;
 
-	for (i = 0; i < IMX7D_RPROC_MEM_MAX; i++) {
+	for (i = 0; i < IMX_RPROC_MEM_MAX; i++) {
 		if (sys >= priv->mem[i].sys_addr && sys + len <
 		    priv->mem[i].sys_addr +  priv->mem[i].size) {
 			unsigned int offset = sys - priv->mem[i].sys_addr;
@@ -425,7 +425,7 @@ static int imx_rproc_addr_init(struct imx_rproc *priv,
 		if (!(att->flags & ATT_OWN))
 			continue;
 
-		if (b >= IMX7D_RPROC_MEM_MAX)
+		if (b >= IMX_RPROC_MEM_MAX)
 			break;
 
 		priv->mem[b].cpu_addr = devm_ioremap(&pdev->dev,
@@ -461,7 +461,7 @@ static int imx_rproc_addr_init(struct imx_rproc *priv,
 
 		of_node_put(node);
 
-		if (b >= IMX7D_RPROC_MEM_MAX)
+		if (b >= IMX_RPROC_MEM_MAX)
 			break;
 
 		/* Not use resource version, because we might share region */
-- 
cgit v1.2.3


From 10a3d4079eaea06472f1981152e2840e7232ffa9 Mon Sep 17 00:00:00 2001
From: Peng Fan <peng.fan@nxp.com>
Date: Thu, 8 Apr 2021 09:44:48 +0800
Subject: remoteproc: imx_rproc: move memory parsing to rproc_ops

Use the rproc_ops::prepare() hook for doing memory resources
reallocation when reattaching a remote procesor.

Suggested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/1617846289-13496-4-git-send-email-peng.fan@oss.nxp.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/imx_rproc.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index b05aae0ad7a2..7cd09971d1a4 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -317,7 +317,7 @@ static int imx_rproc_mem_release(struct rproc *rproc,
 	return 0;
 }
 
-static int imx_rproc_parse_memory_regions(struct rproc *rproc)
+static int imx_rproc_prepare(struct rproc *rproc)
 {
 	struct imx_rproc *priv = rproc->priv;
 	struct device_node *np = priv->dev->of_node;
@@ -363,10 +363,7 @@ static int imx_rproc_parse_memory_regions(struct rproc *rproc)
 
 static int imx_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
 {
-	int ret = imx_rproc_parse_memory_regions(rproc);
-
-	if (ret)
-		return ret;
+	int ret;
 
 	ret = rproc_elf_load_rsc_table(rproc, fw);
 	if (ret)
@@ -399,6 +396,7 @@ static void imx_rproc_kick(struct rproc *rproc, int vqid)
 }
 
 static const struct rproc_ops imx_rproc_ops = {
+	.prepare	= imx_rproc_prepare,
 	.start		= imx_rproc_start,
 	.stop		= imx_rproc_stop,
 	.kick		= imx_rproc_kick,
-- 
cgit v1.2.3


From 5e4c1243071d29ed5511121d044116b942ba6a7b Mon Sep 17 00:00:00 2001
From: Peng Fan <peng.fan@nxp.com>
Date: Thu, 8 Apr 2021 09:44:49 +0800
Subject: remoteproc: imx_rproc: support remote cores booted before Linux
 Kernel

 - When remote cores are kicked before Linux Kernel, we are not able
   to get resource table from the firmware elf file, so we need to add
   rsc_table to hold the resource table published by remote cores and
   imx_rproc_get_loaded_rsc_table is to get the resource table.
 - Per remoteproc framework, add attach hook for processor in a detached
   state.
 - Add imx_rproc_detect_mode to detect remote cores' working mode to
   set the state which is required by remoteproc framework.

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/1617846289-13496-5-git-send-email-peng.fan@oss.nxp.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/imx_rproc.c | 45 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

(limited to 'drivers')

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 7cd09971d1a4..d6338872c6db 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -95,6 +95,7 @@ struct imx_rproc {
 	struct mbox_chan		*rx_ch;
 	struct work_struct		rproc_work;
 	struct workqueue_struct		*workqueue;
+	void __iomem			*rsc_table;
 };
 
 static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
@@ -395,8 +396,26 @@ static void imx_rproc_kick(struct rproc *rproc, int vqid)
 			__func__, vqid, err);
 }
 
+static int imx_rproc_attach(struct rproc *rproc)
+{
+	return 0;
+}
+
+static struct resource_table *imx_rproc_get_loaded_rsc_table(struct rproc *rproc, size_t *table_sz)
+{
+	struct imx_rproc *priv = rproc->priv;
+
+	/* The resource table has already been mapped in imx_rproc_addr_init */
+	if (!priv->rsc_table)
+		return NULL;
+
+	*table_sz = SZ_1K;
+	return (struct resource_table *)priv->rsc_table;
+}
+
 static const struct rproc_ops imx_rproc_ops = {
 	.prepare	= imx_rproc_prepare,
+	.attach		= imx_rproc_attach,
 	.start		= imx_rproc_start,
 	.stop		= imx_rproc_stop,
 	.kick		= imx_rproc_kick,
@@ -404,6 +423,7 @@ static const struct rproc_ops imx_rproc_ops = {
 	.load		= rproc_elf_load_segments,
 	.parse_fw	= imx_rproc_parse_fw,
 	.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
+	.get_loaded_rsc_table = imx_rproc_get_loaded_rsc_table,
 	.sanity_check	= rproc_elf_sanity_check,
 	.get_boot_addr	= rproc_elf_get_boot_addr,
 };
@@ -470,6 +490,8 @@ static int imx_rproc_addr_init(struct imx_rproc *priv,
 		}
 		priv->mem[b].sys_addr = res.start;
 		priv->mem[b].size = resource_size(&res);
+		if (!strcmp(node->name, "rsc_table"))
+			priv->rsc_table = priv->mem[b].cpu_addr;
 		b++;
 	}
 
@@ -536,6 +558,25 @@ static void imx_rproc_free_mbox(struct rproc *rproc)
 	mbox_free_channel(priv->rx_ch);
 }
 
+static int imx_rproc_detect_mode(struct imx_rproc *priv)
+{
+	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
+	struct device *dev = priv->dev;
+	int ret;
+	u32 val;
+
+	ret = regmap_read(priv->regmap, dcfg->src_reg, &val);
+	if (ret) {
+		dev_err(dev, "Failed to read src\n");
+		return ret;
+	}
+
+	if (!(val & dcfg->src_stop))
+		priv->rproc->state = RPROC_DETACHED;
+
+	return 0;
+}
+
 static int imx_rproc_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -590,6 +631,10 @@ static int imx_rproc_probe(struct platform_device *pdev)
 		goto err_put_mbox;
 	}
 
+	ret = imx_rproc_detect_mode(priv);
+	if (ret)
+		goto err_put_mbox;
+
 	priv->clk = devm_clk_get(dev, NULL);
 	if (IS_ERR(priv->clk)) {
 		dev_err(dev, "Failed to get clock\n");
-- 
cgit v1.2.3


From edf696f26855788cdff832ac83319e1f2aafcc90 Mon Sep 17 00:00:00 2001
From: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Date: Wed, 31 Mar 2021 09:33:47 +0200
Subject: remoteproc: stm32: add capability to detach

A mechanism similar to the shutdown mailbox signal is implemented to
detach a remote processor.

Upon detachment, a signal is sent to the remote firmware, allowing it
to perform specific actions such as stopping rpmsg communication.

The Cortex-M hold boot is also disabled to allow the remote processor
to restart in case of crash.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Tested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210331073347.8293-3-arnaud.pouliquen@foss.st.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/remoteproc/stm32_rproc.c | 39 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 37 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
index 3d45f51de4d0..7353f9e7e7af 100644
--- a/drivers/remoteproc/stm32_rproc.c
+++ b/drivers/remoteproc/stm32_rproc.c
@@ -28,7 +28,7 @@
 #define RELEASE_BOOT		1
 
 #define MBOX_NB_VQ		2
-#define MBOX_NB_MBX		3
+#define MBOX_NB_MBX		4
 
 #define STM32_SMC_RCC		0x82001000
 #define STM32_SMC_REG_WRITE	0x1
@@ -38,6 +38,7 @@
 #define STM32_MBX_VQ1		"vq1"
 #define STM32_MBX_VQ1_ID	1
 #define STM32_MBX_SHUTDOWN	"shutdown"
+#define STM32_MBX_DETACH	"detach"
 
 #define RSC_TBL_SIZE		1024
 
@@ -336,6 +337,15 @@ static const struct stm32_mbox stm32_rproc_mbox[MBOX_NB_MBX] = {
 			.tx_done = NULL,
 			.tx_tout = 500, /* 500 ms time out */
 		},
+	},
+	{
+		.name = STM32_MBX_DETACH,
+		.vq_id = -1,
+		.client = {
+			.tx_block = true,
+			.tx_done = NULL,
+			.tx_tout = 200, /* 200 ms time out to detach should be fair enough */
+		},
 	}
 };
 
@@ -461,6 +471,25 @@ static int stm32_rproc_attach(struct rproc *rproc)
 	return stm32_rproc_set_hold_boot(rproc, true);
 }
 
+static int stm32_rproc_detach(struct rproc *rproc)
+{
+	struct stm32_rproc *ddata = rproc->priv;
+	int err, dummy_data, idx;
+
+	/* Inform the remote processor of the detach */
+	idx = stm32_rproc_mbox_idx(rproc, STM32_MBX_DETACH);
+	if (idx >= 0 && ddata->mb[idx].chan) {
+		/* A dummy data is sent to allow to block on transmit */
+		err = mbox_send_message(ddata->mb[idx].chan,
+					&dummy_data);
+		if (err < 0)
+			dev_warn(&rproc->dev, "warning: remote FW detach without ack\n");
+	}
+
+	/* Allow remote processor to auto-reboot */
+	return stm32_rproc_set_hold_boot(rproc, false);
+}
+
 static int stm32_rproc_stop(struct rproc *rproc)
 {
 	struct stm32_rproc *ddata = rproc->priv;
@@ -597,7 +626,12 @@ stm32_rproc_get_loaded_rsc_table(struct rproc *rproc, size_t *table_sz)
 	}
 
 done:
-	/* Assuming the resource table fits in 1kB is fair */
+	/*
+	 * Assuming the resource table fits in 1kB is fair.
+	 * Notice for the detach, that this 1 kB memory area has to be reserved in the coprocessor
+	 * firmware for the resource table. On detach, the remoteproc core re-initializes this
+	 * entire area by overwriting it with the initial values stored in rproc->clean_table.
+	 */
 	*table_sz = RSC_TBL_SIZE;
 	return (struct resource_table *)ddata->rsc_va;
 }
@@ -607,6 +641,7 @@ static const struct rproc_ops st_rproc_ops = {
 	.start		= stm32_rproc_start,
 	.stop		= stm32_rproc_stop,
 	.attach		= stm32_rproc_attach,
+	.detach		= stm32_rproc_detach,
 	.kick		= stm32_rproc_kick,
 	.load		= rproc_elf_load_segments,
 	.parse_fw	= stm32_rproc_parse_fw,
-- 
cgit v1.2.3


From b1160a06e0ea8c59454bc13b8d2a21cf569c0ff5 Mon Sep 17 00:00:00 2001
From: Chen Hui <clare.chenhui@huawei.com>
Date: Fri, 9 Apr 2021 15:57:48 +0800
Subject: PCI: altera-msi: Remove redundant dev_err call in altera_msi_probe()

There is a error message within devm_ioremap_resource()
already, so remove the dev_err() call to avoid redundant
error message.

Link: https://lore.kernel.org/r/20210409075748.226141-1-clare.chenhui@huawei.com
Signed-off-by: Chen Hui <clare.chenhui@huawei.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Ley Foon Tan <ley.foon.tan@intel.com>
---
 drivers/pci/controller/pcie-altera-msi.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pcie-altera-msi.c b/drivers/pci/controller/pcie-altera-msi.c
index 42691dd8ebef..98aa1dccc6e6 100644
--- a/drivers/pci/controller/pcie-altera-msi.c
+++ b/drivers/pci/controller/pcie-altera-msi.c
@@ -236,10 +236,8 @@ static int altera_msi_probe(struct platform_device *pdev)
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 					   "vector_slave");
 	msi->vector_base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(msi->vector_base)) {
-		dev_err(&pdev->dev, "failed to map vector_slave memory\n");
+	if (IS_ERR(msi->vector_base))
 		return PTR_ERR(msi->vector_base);
-	}
 
 	msi->vector_phy = res->start;
 
-- 
cgit v1.2.3


From 3a306a5b60165a79c963585ac1863a12bba0ae7e Mon Sep 17 00:00:00 2001
From: Guobin Huang <huangguobin4@huawei.com>
Date: Tue, 6 Apr 2021 20:06:37 +0800
Subject: PCI: cpqphp: Use DEFINE_SPINLOCK() for int15_lock

Initialize the static int15_lock spinlock with DEFINE_SPINLOCK() rather
than explicitly calling spin_lock_init().

Link: https://lore.kernel.org/r/1617710797-48903-1-git-send-email-huangguobin4@huawei.com
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Guobin Huang <huangguobin4@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/hotplug/cpqphp_nvram.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/hotplug/cpqphp_nvram.c b/drivers/pci/hotplug/cpqphp_nvram.c
index 00cd2b43364f..7a65d427ac11 100644
--- a/drivers/pci/hotplug/cpqphp_nvram.c
+++ b/drivers/pci/hotplug/cpqphp_nvram.c
@@ -80,7 +80,7 @@ static u8 evbuffer[1024];
 static void __iomem *compaq_int15_entry_point;
 
 /* lock for ordering int15_bios_call() */
-static spinlock_t int15_lock;
+static DEFINE_SPINLOCK(int15_lock);
 
 
 /* This is a series of function that deals with
@@ -415,9 +415,6 @@ void compaq_nvram_init(void __iomem *rom_start)
 		compaq_int15_entry_point = (rom_start + ROM_INT15_PHY_ADDR - ROM_PHY_ADDR);
 
 	dbg("int15 entry  = %p\n", compaq_int15_entry_point);
-
-	/* initialize our int15 lock */
-	spin_lock_init(&int15_lock);
 }
 
 
-- 
cgit v1.2.3


From d44616c6cc3e35eea03ecfe9040edfa2b486a059 Mon Sep 17 00:00:00 2001
From: Daniel Lezcano <daniel.lezcano@linaro.org>
Date: Fri, 19 Mar 2021 21:22:57 +0100
Subject: thermal/core: Fix memory leak in the error path

Fix the following error:

 smatch warnings:
 drivers/thermal/thermal_core.c:1020 __thermal_cooling_device_register() warn: possible memory leak of 'cdev'

by freeing the cdev when exiting the function in the error path.

Fixes: 584837618100 ("thermal/drivers/core: Use a char pointer for the cooling device name")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210319202257.890848-1-daniel.lezcano@linaro.org
---
 drivers/thermal/thermal_core.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index c8d4010940ef..3566fd291399 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1017,6 +1017,7 @@ out_kfree_type:
 out_ida_remove:
 	ida_simple_remove(&thermal_cdev_ida, cdev->id);
 out_kfree_cdev:
+	kfree(cdev);
 	return ERR_PTR(ret);
 }
 
-- 
cgit v1.2.3


From 9aa80ab2c0ba67ce3281aee604b543293f71390d Mon Sep 17 00:00:00 2001
From: Daniel Lezcano <daniel.lezcano@linaro.org>
Date: Fri, 19 Mar 2021 21:24:23 +0100
Subject: thermal/drivers/devfreq_cooling: Fix wrong return on error path

The following error is reported by kbuild:

 smatch warnings:
 drivers/thermal/devfreq_cooling.c:433 of_devfreq_cooling_register_power() warn: passing zero to 'ERR_PTR'

Fix the error code by the setting the 'err' variable instead of 'cdev'.

Fixes: f8d354e821b2 ("thermal/drivers/devfreq_cooling: Use device name instead of auto-numbering")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210319202424.890968-1-daniel.lezcano@linaro.org
---
 drivers/thermal/devfreq_cooling.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/thermal/devfreq_cooling.c b/drivers/thermal/devfreq_cooling.c
index fb250ac16f50..3a788ac4f525 100644
--- a/drivers/thermal/devfreq_cooling.c
+++ b/drivers/thermal/devfreq_cooling.c
@@ -402,7 +402,7 @@ of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
 	if (err < 0)
 		goto free_table;
 
-	cdev = ERR_PTR(-ENOMEM);
+	err = -ENOMEM;
 	name = kasprintf(GFP_KERNEL, "devfreq-%s", dev_name(dev));
 	if (!name)
 		goto remove_qos_req;
-- 
cgit v1.2.3


From 6cc7b38c0ca3187abd07af849ec179b42337bcf6 Mon Sep 17 00:00:00 2001
From: Daniel Lezcano <daniel.lezcano@linaro.org>
Date: Fri, 19 Mar 2021 21:25:22 +0100
Subject: thermal/drivers/cpuidle_cooling: Fix use after error

When the function successfully finishes it logs an information about
the registration of the cooling device and use its name to build the
message. Unfortunately it was freed right before:

drivers/thermal/cpuidle_cooling.c:218 __cpuidle_cooling_register()
	warn: 'name' was already freed.

Fix this by freeing after the message happened.

Fixes: 6fd1b186d900 ("thermal/drivers/cpuidle_cooling: Use device name instead of auto-numbering")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lore.kernel.org/r/20210319202522.891061-1-daniel.lezcano@linaro.org
---
 drivers/thermal/cpuidle_cooling.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/cpuidle_cooling.c b/drivers/thermal/cpuidle_cooling.c
index f32976163bad..4f41102e8b16 100644
--- a/drivers/thermal/cpuidle_cooling.c
+++ b/drivers/thermal/cpuidle_cooling.c
@@ -208,18 +208,20 @@ static int __cpuidle_cooling_register(struct device_node *np,
 
 	cdev = thermal_of_cooling_device_register(np, name, idle_cdev,
 						  &cpuidle_cooling_ops);
-	kfree(name);
-
 	if (IS_ERR(cdev)) {
 		ret = PTR_ERR(cdev);
-		goto out_unregister;
+		goto out_kfree_name;
 	}
 
 	pr_debug("%s: Idle injection set with idle duration=%u, latency=%u\n",
 		 name, idle_duration_us, latency_us);
 
+	kfree(name);
+
 	return 0;
 
+out_kfree_name:
+	kfree(name);
 out_unregister:
 	idle_inject_unregister(ii_dev);
 out_kfree:
-- 
cgit v1.2.3


From 4481b39f9390e82c73fb03193b4a5e7e242d22a4 Mon Sep 17 00:00:00 2001
From: Hao Fang <fanghao11@huawei.com>
Date: Tue, 30 Mar 2021 14:45:33 +0800
Subject: thermal/drivers/hisi: Use the correct HiSilicon copyright

s/Hisilicon/HiSilicon/g.
It should use capital S, according to
https://www.hisilicon.com/en/terms-of-use.

Signed-off-by: Hao Fang <fanghao11@huawei.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/1617086733-2705-1-git-send-email-fanghao11@huawei.com
---
 drivers/thermal/hisi_thermal.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/hisi_thermal.c b/drivers/thermal/hisi_thermal.c
index ee05950afd2f..d902db9f267f 100644
--- a/drivers/thermal/hisi_thermal.c
+++ b/drivers/thermal/hisi_thermal.c
@@ -1,7 +1,7 @@
 /*
- * Hisilicon thermal sensor driver
+ * HiSilicon thermal sensor driver
  *
- * Copyright (c) 2014-2015 Hisilicon Limited.
+ * Copyright (c) 2014-2015 HiSilicon Limited.
  * Copyright (c) 2014-2015 Linaro Limited.
  *
  * Xinwei Kong <kong.kongxinwei@hisilicon.com>
@@ -672,5 +672,5 @@ module_platform_driver(hisi_thermal_driver);
 
 MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
 MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>");
-MODULE_DESCRIPTION("Hisilicon thermal driver");
+MODULE_DESCRIPTION("HiSilicon thermal driver");
 MODULE_LICENSE("GPL v2");
-- 
cgit v1.2.3


From 34ab17cc6c2c1ac93d7e5d53bb972df9a968f085 Mon Sep 17 00:00:00 2001
From: brian-sy yang <brian-sy.yang@mediatek.com>
Date: Tue, 29 Dec 2020 13:08:31 +0800
Subject: thermal/drivers/cpufreq_cooling: Fix slab OOB issue

Slab OOB issue is scanned by KASAN in cpu_power_to_freq().
If power is limited below the power of OPP0 in EM table,
it will cause slab out-of-bound issue with negative array
index.

Return the lowest frequency if limited power cannot found
a suitable OPP in EM table to fix this issue.

Backtrace:
[<ffffffd02d2a37f0>] die+0x104/0x5ac
[<ffffffd02d2a5630>] bug_handler+0x64/0xd0
[<ffffffd02d288ce4>] brk_handler+0x160/0x258
[<ffffffd02d281e5c>] do_debug_exception+0x248/0x3f0
[<ffffffd02d284488>] el1_dbg+0x14/0xbc
[<ffffffd02d75d1d4>] __kasan_report+0x1dc/0x1e0
[<ffffffd02d75c2e0>] kasan_report+0x10/0x20
[<ffffffd02d75def8>] __asan_report_load8_noabort+0x18/0x28
[<ffffffd02e6fce5c>] cpufreq_power2state+0x180/0x43c
[<ffffffd02e6ead80>] power_actor_set_power+0x114/0x1d4
[<ffffffd02e6fac24>] allocate_power+0xaec/0xde0
[<ffffffd02e6f9f80>] power_allocator_throttle+0x3ec/0x5a4
[<ffffffd02e6ea888>] handle_thermal_trip+0x160/0x294
[<ffffffd02e6edd08>] thermal_zone_device_check+0xe4/0x154
[<ffffffd02d351cb4>] process_one_work+0x5e4/0xe28
[<ffffffd02d352f44>] worker_thread+0xa4c/0xfac
[<ffffffd02d360124>] kthread+0x33c/0x358
[<ffffffd02d289940>] ret_from_fork+0xc/0x18

Fixes: 371a3bc79c11b ("thermal/drivers/cpufreq_cooling: Fix wrong frequency converted from power")
Signed-off-by: brian-sy yang <brian-sy.yang@mediatek.com>
Signed-off-by: Michael Kao <michael.kao@mediatek.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Cc: stable@vger.kernel.org #v5.7
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20201229050831.19493-1-michael.kao@mediatek.com
---
 drivers/thermal/cpufreq_cooling.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/thermal/cpufreq_cooling.c b/drivers/thermal/cpufreq_cooling.c
index f3d308427665..eeb4e4b76c0b 100644
--- a/drivers/thermal/cpufreq_cooling.c
+++ b/drivers/thermal/cpufreq_cooling.c
@@ -116,7 +116,7 @@ static u32 cpu_power_to_freq(struct cpufreq_cooling_device *cpufreq_cdev,
 {
 	int i;
 
-	for (i = cpufreq_cdev->max_level; i >= 0; i--) {
+	for (i = cpufreq_cdev->max_level; i > 0; i--) {
 		if (power >= cpufreq_cdev->em->table[i].power)
 			break;
 	}
-- 
cgit v1.2.3


From aa92b3310c55b21153ca1514719ff8d5dfe74bd7 Mon Sep 17 00:00:00 2001
From: David Collins <collinsd@codeaurora.org>
Date: Wed, 29 Jul 2020 09:52:52 -0700
Subject: thermal/drivers/qcom-spmi-temp-alarm: Add support for GEN2 rev 1 PMIC
 peripherals

Add support for TEMP_ALARM GEN2 PMIC peripherals with digital
major revision 1.  This revision utilizes a different temperature
threshold mapping than earlier revisions.

Signed-off-by: David Collins <collinsd@codeaurora.org>
Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/69c90a004b3f5b7ae282f5ec5ca2920a48f23e02.1596040416.git.gurus@codeaurora.org
---
 drivers/thermal/qcom/qcom-spmi-temp-alarm.c | 91 +++++++++++++++++++----------
 1 file changed, 61 insertions(+), 30 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/qcom/qcom-spmi-temp-alarm.c b/drivers/thermal/qcom/qcom-spmi-temp-alarm.c
index 6dc879fea9c8..7419e196dbb0 100644
--- a/drivers/thermal/qcom/qcom-spmi-temp-alarm.c
+++ b/drivers/thermal/qcom/qcom-spmi-temp-alarm.c
@@ -17,6 +17,7 @@
 
 #include "../thermal_core.h"
 
+#define QPNP_TM_REG_DIG_MAJOR		0x01
 #define QPNP_TM_REG_TYPE		0x04
 #define QPNP_TM_REG_SUBTYPE		0x05
 #define QPNP_TM_REG_STATUS		0x08
@@ -38,26 +39,30 @@
 
 #define ALARM_CTRL_FORCE_ENABLE		BIT(7)
 
-/*
- * Trip point values based on threshold control
- * 0 = {105 C, 125 C, 145 C}
- * 1 = {110 C, 130 C, 150 C}
- * 2 = {115 C, 135 C, 155 C}
- * 3 = {120 C, 140 C, 160 C}
-*/
-#define TEMP_STAGE_STEP			20000	/* Stage step: 20.000 C */
-#define TEMP_STAGE_HYSTERESIS		2000
+#define THRESH_COUNT			4
+#define STAGE_COUNT			3
+
+/* Over-temperature trip point values in mC */
+static const long temp_map_gen1[THRESH_COUNT][STAGE_COUNT] = {
+	{ 105000, 125000, 145000 },
+	{ 110000, 130000, 150000 },
+	{ 115000, 135000, 155000 },
+	{ 120000, 140000, 160000 },
+};
+
+static const long temp_map_gen2_v1[THRESH_COUNT][STAGE_COUNT] = {
+	{  90000, 110000, 140000 },
+	{  95000, 115000, 145000 },
+	{ 100000, 120000, 150000 },
+	{ 105000, 125000, 155000 },
+};
 
-#define TEMP_THRESH_MIN			105000	/* Threshold Min: 105 C */
-#define TEMP_THRESH_STEP		5000	/* Threshold step: 5 C */
+#define TEMP_THRESH_STEP		5000 /* Threshold step: 5 C */
 
 #define THRESH_MIN			0
 #define THRESH_MAX			3
 
-/* Stage 2 Threshold Min: 125 C */
-#define STAGE2_THRESHOLD_MIN		125000
-/* Stage 2 Threshold Max: 140 C */
-#define STAGE2_THRESHOLD_MAX		140000
+#define TEMP_STAGE_HYSTERESIS		2000
 
 /* Temperature in Milli Celsius reported during stage 0 if no ADC is present */
 #define DEFAULT_TEMP			37000
@@ -77,6 +82,7 @@ struct qpnp_tm_chip {
 	bool				initialized;
 
 	struct iio_channel		*adc;
+	const long			(*temp_map)[THRESH_COUNT][STAGE_COUNT];
 };
 
 /* This array maps from GEN2 alarm state to GEN1 alarm stage */
@@ -100,6 +106,23 @@ static int qpnp_tm_write(struct qpnp_tm_chip *chip, u16 addr, u8 data)
 	return regmap_write(chip->map, chip->base + addr, data);
 }
 
+/**
+ * qpnp_tm_decode_temp() - return temperature in mC corresponding to the
+ *		specified over-temperature stage
+ * @chip:		Pointer to the qpnp_tm chip
+ * @stage:		Over-temperature stage
+ *
+ * Return: temperature in mC
+ */
+static long qpnp_tm_decode_temp(struct qpnp_tm_chip *chip, unsigned int stage)
+{
+	if (!chip->temp_map || chip->thresh >= THRESH_COUNT || stage == 0 ||
+	    stage > STAGE_COUNT)
+		return 0;
+
+	return (*chip->temp_map)[chip->thresh][stage - 1];
+}
+
 /**
  * qpnp_tm_get_temp_stage() - return over-temperature stage
  * @chip:		Pointer to the qpnp_tm chip
@@ -149,14 +172,12 @@ static int qpnp_tm_update_temp_no_adc(struct qpnp_tm_chip *chip)
 
 	if (stage_new > stage_old) {
 		/* increasing stage, use lower bound */
-		chip->temp = (stage_new - 1) * TEMP_STAGE_STEP +
-			     chip->thresh * TEMP_THRESH_STEP +
-			     TEMP_STAGE_HYSTERESIS + TEMP_THRESH_MIN;
+		chip->temp = qpnp_tm_decode_temp(chip, stage_new)
+				+ TEMP_STAGE_HYSTERESIS;
 	} else if (stage_new < stage_old) {
 		/* decreasing stage, use upper bound */
-		chip->temp = stage_new * TEMP_STAGE_STEP +
-			     chip->thresh * TEMP_THRESH_STEP -
-			     TEMP_STAGE_HYSTERESIS + TEMP_THRESH_MIN;
+		chip->temp = qpnp_tm_decode_temp(chip, stage_new + 1)
+				- TEMP_STAGE_HYSTERESIS;
 	}
 
 	chip->stage = stage;
@@ -199,26 +220,28 @@ static int qpnp_tm_get_temp(void *data, int *temp)
 static int qpnp_tm_update_critical_trip_temp(struct qpnp_tm_chip *chip,
 					     int temp)
 {
-	u8 reg;
+	long stage2_threshold_min = (*chip->temp_map)[THRESH_MIN][1];
+	long stage2_threshold_max = (*chip->temp_map)[THRESH_MAX][1];
 	bool disable_s2_shutdown = false;
+	u8 reg;
 
 	WARN_ON(!mutex_is_locked(&chip->lock));
 
 	/*
 	 * Default: S2 and S3 shutdown enabled, thresholds at
-	 * 105C/125C/145C, monitoring at 25Hz
+	 * lowest threshold set, monitoring at 25Hz
 	 */
 	reg = SHUTDOWN_CTRL1_RATE_25HZ;
 
 	if (temp == THERMAL_TEMP_INVALID ||
-	    temp < STAGE2_THRESHOLD_MIN) {
+	    temp < stage2_threshold_min) {
 		chip->thresh = THRESH_MIN;
 		goto skip;
 	}
 
-	if (temp <= STAGE2_THRESHOLD_MAX) {
+	if (temp <= stage2_threshold_max) {
 		chip->thresh = THRESH_MAX -
-			((STAGE2_THRESHOLD_MAX - temp) /
+			((stage2_threshold_max - temp) /
 			 TEMP_THRESH_STEP);
 		disable_s2_shutdown = true;
 	} else {
@@ -326,9 +349,7 @@ static int qpnp_tm_init(struct qpnp_tm_chip *chip)
 		? chip->stage : alarm_state_map[chip->stage];
 
 	if (stage)
-		chip->temp = chip->thresh * TEMP_THRESH_STEP +
-			     (stage - 1) * TEMP_STAGE_STEP +
-			     TEMP_THRESH_MIN;
+		chip->temp = qpnp_tm_decode_temp(chip, stage);
 
 	crit_temp = qpnp_tm_get_critical_trip_temp(chip);
 	ret = qpnp_tm_update_critical_trip_temp(chip, crit_temp);
@@ -350,7 +371,7 @@ static int qpnp_tm_probe(struct platform_device *pdev)
 {
 	struct qpnp_tm_chip *chip;
 	struct device_node *node;
-	u8 type, subtype;
+	u8 type, subtype, dig_major;
 	u32 res;
 	int ret, irq;
 
@@ -400,6 +421,12 @@ static int qpnp_tm_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	ret = qpnp_tm_read(chip, QPNP_TM_REG_DIG_MAJOR, &dig_major);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "could not read dig_major\n");
+		return ret;
+	}
+
 	if (type != QPNP_TM_TYPE || (subtype != QPNP_TM_SUBTYPE_GEN1
 				     && subtype != QPNP_TM_SUBTYPE_GEN2)) {
 		dev_err(&pdev->dev, "invalid type 0x%02x or subtype 0x%02x\n",
@@ -408,6 +435,10 @@ static int qpnp_tm_probe(struct platform_device *pdev)
 	}
 
 	chip->subtype = subtype;
+	if (subtype == QPNP_TM_SUBTYPE_GEN2 && dig_major >= 1)
+		chip->temp_map = &temp_map_gen2_v1;
+	else
+		chip->temp_map = &temp_map_gen1;
 
 	/*
 	 * Register the sensor before initializing the hardware to be able to
-- 
cgit v1.2.3


From f4136863e8899fa0554343201b78b9e197c78a78 Mon Sep 17 00:00:00 2001
From: Guangqing Zhu <zhuguangqing83@gmail.com>
Date: Sun, 4 Apr 2021 20:54:31 +0800
Subject: thermal/drivers/tsens: Fix missing put_device error

Fixes coccicheck error:

drivers/thermal/qcom/tsens.c:759:4-10: ERROR: missing put_device; call
of_find_device_by_node on line 715, but without a corresponding object
release within this function.

Fixes: a7ff82976122 ("drivers: thermal: tsens: Merge tsens-common.c into tsens.c")
Signed-off-by: Guangqing Zhu <zhuguangqing83@gmail.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210404125431.12208-1-zhuguangqing83@gmail.com
---
 drivers/thermal/qcom/tsens.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index d8ce3a687b80..3c4c0516e58a 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -755,8 +755,10 @@ int __init init_common(struct tsens_priv *priv)
 		for (i = VER_MAJOR; i <= VER_STEP; i++) {
 			priv->rf[i] = devm_regmap_field_alloc(dev, priv->srot_map,
 							      priv->fields[i]);
-			if (IS_ERR(priv->rf[i]))
-				return PTR_ERR(priv->rf[i]);
+			if (IS_ERR(priv->rf[i])) {
+				ret = PTR_ERR(priv->rf[i]);
+				goto err_put_device;
+			}
 		}
 		ret = regmap_field_read(priv->rf[VER_MINOR], &ver_minor);
 		if (ret)
-- 
cgit v1.2.3


From 8aa058d79b6d491778836626ba94a5165589acaf Mon Sep 17 00:00:00 2001
From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Date: Fri, 5 Mar 2021 02:28:32 -0600
Subject: ubi: Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning
by explicitly adding a break statement instead of letting the code fall
through to the next case.

Link: https://github.com/KSPP/linux/issues/115
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
---
 drivers/mtd/ubi/build.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index f399edc82191..a7e3eb9befb6 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -1350,6 +1350,7 @@ static int bytes_str_to_int(const char *str)
 		fallthrough;
 	case 'K':
 		result *= 1024;
+		break;
 	case '\0':
 		break;
 	default:
-- 
cgit v1.2.3


From 9a29f7f020e06f14eb126bcb84a7f0d166415824 Mon Sep 17 00:00:00 2001
From: Wan Jiabing <wanjiabing@vivo.com>
Date: Tue, 6 Apr 2021 15:16:18 +0800
Subject: ubi: Remove unnecessary struct declaration

struct ubi_wl_entry is defined at 178th line.
The declaration here is unnecessary. Remove it.

Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
---
 drivers/mtd/ubi/ubi.h | 2 --
 1 file changed, 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h
index c2da77163f94..7c083ad58274 100644
--- a/drivers/mtd/ubi/ubi.h
+++ b/drivers/mtd/ubi/ubi.h
@@ -388,8 +388,6 @@ struct ubi_volume_desc {
 	int mode;
 };
 
-struct ubi_wl_entry;
-
 /**
  * struct ubi_debug_info - debugging information for an UBI device.
  *
-- 
cgit v1.2.3


From a7b6864da7e3fb59c5385bb1c28f3a676dc3da27 Mon Sep 17 00:00:00 2001
From: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Date: Thu, 15 Apr 2021 16:30:22 +0800
Subject: PCI: shpchp: Remove unused shpc_writeb()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fix the following clang warning:

  drivers/pci/hotplug/shpchp_hpc.c:177:20: warning: unused function 'shpc_writeb' [-Wunused-function].

Link: https://lore.kernel.org/r/1618475422-96531-1-git-send-email-jiapeng.chong@linux.alibaba.com
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
---
 drivers/pci/hotplug/shpchp_hpc.c | 5 -----
 1 file changed, 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/hotplug/shpchp_hpc.c b/drivers/pci/hotplug/shpchp_hpc.c
index db047284c291..9e3b27744305 100644
--- a/drivers/pci/hotplug/shpchp_hpc.c
+++ b/drivers/pci/hotplug/shpchp_hpc.c
@@ -174,11 +174,6 @@ static inline u8 shpc_readb(struct controller *ctrl, int reg)
 	return readb(ctrl->creg + reg);
 }
 
-static inline void shpc_writeb(struct controller *ctrl, int reg, u8 val)
-{
-	writeb(val, ctrl->creg + reg);
-}
-
 static inline u16 shpc_readw(struct controller *ctrl, int reg)
 {
 	return readw(ctrl->creg + reg);
-- 
cgit v1.2.3


From 7f100744749e4fe547dece3bb6557fae5f0a7252 Mon Sep 17 00:00:00 2001
From: Vidya Sagar <vidyas@nvidia.com>
Date: Fri, 16 Apr 2021 19:15:37 +0530
Subject: PCI: tegra: Add Tegra194 MCFG quirks for ECAM errata

The PCIe controller in Tegra194 SoC is not ECAM-compliant.  With the
current hardware design, ECAM can be enabled only for one controller (the
C5 controller) with bus numbers starting from 160 instead of 0. A different
approach is taken to avoid this abnormal way of enabling ECAM for just one
controller but to enable configuration space access for all the other
controllers. In this approach, ops are added through MCFG quirk mechanism
which access the configuration spaces by dynamically programming iATU
(internal AddressTranslation Unit) to generate respective configuration
accesses just like the way it is done in DesignWare core sub-system.

This issue is specific to Tegra194 and it would be fixed in the future
generations of Tegra SoCs.

Link: https://lore.kernel.org/r/20210416134537.19474-1-vidyas@nvidia.com
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/acpi/pci_mcfg.c                    |   7 ++
 drivers/pci/controller/dwc/Makefile        |   2 +-
 drivers/pci/controller/dwc/pcie-tegra194.c | 102 +++++++++++++++++++++++++++++
 include/linux/pci-ecam.h                   |   1 +
 4 files changed, 111 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/acpi/pci_mcfg.c b/drivers/acpi/pci_mcfg.c
index 95f23acd5b80..53cab975f612 100644
--- a/drivers/acpi/pci_mcfg.c
+++ b/drivers/acpi/pci_mcfg.c
@@ -116,6 +116,13 @@ static struct mcfg_fixup mcfg_quirks[] = {
 	THUNDER_ECAM_QUIRK(2, 12),
 	THUNDER_ECAM_QUIRK(2, 13),
 
+	{ "NVIDIA", "TEGRA194", 1, 0, MCFG_BUS_ANY, &tegra194_pcie_ops},
+	{ "NVIDIA", "TEGRA194", 1, 1, MCFG_BUS_ANY, &tegra194_pcie_ops},
+	{ "NVIDIA", "TEGRA194", 1, 2, MCFG_BUS_ANY, &tegra194_pcie_ops},
+	{ "NVIDIA", "TEGRA194", 1, 3, MCFG_BUS_ANY, &tegra194_pcie_ops},
+	{ "NVIDIA", "TEGRA194", 1, 4, MCFG_BUS_ANY, &tegra194_pcie_ops},
+	{ "NVIDIA", "TEGRA194", 1, 5, MCFG_BUS_ANY, &tegra194_pcie_ops},
+
 #define XGENE_V1_ECAM_MCFG(rev, seg) \
 	{"APM   ", "XGENE   ", rev, seg, MCFG_BUS_ANY, \
 		&xgene_v1_pcie_ecam_ops }
diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
index a751553fa0db..dbb981876556 100644
--- a/drivers/pci/controller/dwc/Makefile
+++ b/drivers/pci/controller/dwc/Makefile
@@ -17,7 +17,6 @@ obj-$(CONFIG_PCIE_INTEL_GW) += pcie-intel-gw.o
 obj-$(CONFIG_PCIE_KIRIN) += pcie-kirin.o
 obj-$(CONFIG_PCIE_HISI_STB) += pcie-histb.o
 obj-$(CONFIG_PCI_MESON) += pci-meson.o
-obj-$(CONFIG_PCIE_TEGRA194) += pcie-tegra194.o
 obj-$(CONFIG_PCIE_UNIPHIER) += pcie-uniphier.o
 obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
 
@@ -34,4 +33,5 @@ obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
 ifdef CONFIG_PCI
 obj-$(CONFIG_ARM64) += pcie-al.o
 obj-$(CONFIG_ARM64) += pcie-hisi.o
+obj-$(CONFIG_ARM64) += pcie-tegra194.o
 endif
diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index 6fa216e52d14..a3979d358d06 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -22,6 +22,8 @@
 #include <linux/of_irq.h>
 #include <linux/of_pci.h>
 #include <linux/pci.h>
+#include <linux/pci-acpi.h>
+#include <linux/pci-ecam.h>
 #include <linux/phy/phy.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/platform_device.h>
@@ -311,6 +313,104 @@ struct tegra_pcie_dw_of_data {
 	enum dw_pcie_device_mode mode;
 };
 
+#if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS)
+struct tegra194_pcie_ecam  {
+	void __iomem *config_base;
+	void __iomem *iatu_base;
+	void __iomem *dbi_base;
+};
+
+static int tegra194_acpi_init(struct pci_config_window *cfg)
+{
+	struct device *dev = cfg->parent;
+	struct tegra194_pcie_ecam *pcie_ecam;
+
+	pcie_ecam = devm_kzalloc(dev, sizeof(*pcie_ecam), GFP_KERNEL);
+	if (!pcie_ecam)
+		return -ENOMEM;
+
+	pcie_ecam->config_base = cfg->win;
+	pcie_ecam->iatu_base = cfg->win + SZ_256K;
+	pcie_ecam->dbi_base = cfg->win + SZ_512K;
+	cfg->priv = pcie_ecam;
+
+	return 0;
+}
+
+static void atu_reg_write(struct tegra194_pcie_ecam *pcie_ecam, int index,
+			  u32 val, u32 reg)
+{
+	u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index);
+
+	writel(val, pcie_ecam->iatu_base + offset + reg);
+}
+
+static void program_outbound_atu(struct tegra194_pcie_ecam *pcie_ecam,
+				 int index, int type, u64 cpu_addr,
+				 u64 pci_addr, u64 size)
+{
+	atu_reg_write(pcie_ecam, index, lower_32_bits(cpu_addr),
+		      PCIE_ATU_LOWER_BASE);
+	atu_reg_write(pcie_ecam, index, upper_32_bits(cpu_addr),
+		      PCIE_ATU_UPPER_BASE);
+	atu_reg_write(pcie_ecam, index, lower_32_bits(pci_addr),
+		      PCIE_ATU_LOWER_TARGET);
+	atu_reg_write(pcie_ecam, index, lower_32_bits(cpu_addr + size - 1),
+		      PCIE_ATU_LIMIT);
+	atu_reg_write(pcie_ecam, index, upper_32_bits(pci_addr),
+		      PCIE_ATU_UPPER_TARGET);
+	atu_reg_write(pcie_ecam, index, type, PCIE_ATU_CR1);
+	atu_reg_write(pcie_ecam, index, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
+}
+
+static void __iomem *tegra194_map_bus(struct pci_bus *bus,
+				      unsigned int devfn, int where)
+{
+	struct pci_config_window *cfg = bus->sysdata;
+	struct tegra194_pcie_ecam *pcie_ecam = cfg->priv;
+	u32 busdev;
+	int type;
+
+	if (bus->number < cfg->busr.start || bus->number > cfg->busr.end)
+		return NULL;
+
+	if (bus->number == cfg->busr.start) {
+		if (PCI_SLOT(devfn) == 0)
+			return pcie_ecam->dbi_base + where;
+		else
+			return NULL;
+	}
+
+	busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
+		 PCIE_ATU_FUNC(PCI_FUNC(devfn));
+
+	if (bus->parent->number == cfg->busr.start) {
+		if (PCI_SLOT(devfn) == 0)
+			type = PCIE_ATU_TYPE_CFG0;
+		else
+			return NULL;
+	} else {
+		type = PCIE_ATU_TYPE_CFG1;
+	}
+
+	program_outbound_atu(pcie_ecam, 0, type, cfg->res.start, busdev,
+			     SZ_256K);
+
+	return pcie_ecam->config_base + where;
+}
+
+const struct pci_ecam_ops tegra194_pcie_ops = {
+	.init		= tegra194_acpi_init,
+	.pci_ops	= {
+		.map_bus	= tegra194_map_bus,
+		.read		= pci_generic_config_read,
+		.write		= pci_generic_config_write,
+	}
+};
+#endif /* defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS) */
+
+#ifdef CONFIG_PCIE_TEGRA194
+
 static inline struct tegra_pcie_dw *to_tegra_pcie(struct dw_pcie *pci)
 {
 	return container_of(pci, struct tegra_pcie_dw, pci);
@@ -2311,3 +2411,5 @@ MODULE_DEVICE_TABLE(of, tegra_pcie_dw_of_match);
 MODULE_AUTHOR("Vidya Sagar <vidyas@nvidia.com>");
 MODULE_DESCRIPTION("NVIDIA PCIe host controller driver");
 MODULE_LICENSE("GPL v2");
+
+#endif /* CONFIG_PCIE_TEGRA194 */
diff --git a/include/linux/pci-ecam.h b/include/linux/pci-ecam.h
index 65d3d83015c3..fbdadd4d8377 100644
--- a/include/linux/pci-ecam.h
+++ b/include/linux/pci-ecam.h
@@ -85,6 +85,7 @@ extern const struct pci_ecam_ops pci_thunder_ecam_ops; /* Cavium ThunderX 1.x */
 extern const struct pci_ecam_ops xgene_v1_pcie_ecam_ops; /* APM X-Gene PCIe v1 */
 extern const struct pci_ecam_ops xgene_v2_pcie_ecam_ops; /* APM X-Gene PCIe v2.x */
 extern const struct pci_ecam_ops al_pcie_ops;	/* Amazon Annapurna Labs PCIe */
+extern const struct pci_ecam_ops tegra194_pcie_ops; /* Tegra194 PCIe */
 #endif
 
 #if IS_ENABLED(CONFIG_PCI_HOST_COMMON)
-- 
cgit v1.2.3


From ea3b50c51d19e2ac00861ac195a3ed5617765255 Mon Sep 17 00:00:00 2001
From: chakravarthikulkarni <chakravarthikulkarni2021@gmail.com>
Date: Mon, 1 Mar 2021 12:51:45 +0530
Subject: PCI: acpiphp: Fix whitespace issue

Fix coding style for braces.

[bhelgaas: drop comment change]
Link: https://lore.kernel.org/r/20210301072145.19018-1-chakravarthikulkarni2021@gmail.com
Signed-off-by: chakravarthikulkarni <chakravarthikulkarni2021@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/hotplug/acpiphp.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/hotplug/acpiphp.h b/drivers/pci/hotplug/acpiphp.h
index a74b274a8c45..1f8ab4377ad8 100644
--- a/drivers/pci/hotplug/acpiphp.h
+++ b/drivers/pci/hotplug/acpiphp.h
@@ -148,8 +148,7 @@ static inline struct acpiphp_root_context *to_acpiphp_root_context(struct acpi_h
  * ACPI has no generic method of setting/getting attention status
  * this allows for device specific driver registration
  */
-struct acpiphp_attention_info
-{
+struct acpiphp_attention_info {
 	int (*set_attn)(struct hotplug_slot *slot, u8 status);
 	int (*get_attn)(struct hotplug_slot *slot, u8 *status);
 	struct module *owner;
-- 
cgit v1.2.3


From 3fd00fdc4f11c656a63e6a6280c0bcb63cf109a2 Mon Sep 17 00:00:00 2001
From: Laurent Vivier <laurent@vivier.eu>
Date: Tue, 23 Mar 2021 23:14:29 +0100
Subject: rtc: goldfish: remove dependency to OF

We want to use the goldfish RTC on a machine without OF.
As there is no real dependency on it, remove the OF dependency from the
goldfish entry in Kconfig

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210323221430.3735147-2-laurent@vivier.eu
---
 drivers/rtc/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 9a82cb57586f..993fd399f590 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -1899,7 +1899,7 @@ config RTC_DRV_HID_SENSOR_TIME
 
 config RTC_DRV_GOLDFISH
 	tristate "Goldfish Real Time Clock"
-	depends on OF && HAS_IOMEM
+	depends on HAS_IOMEM
 	help
 	  Say yes to enable RTC driver for the Goldfish based virtual platform.
 
-- 
cgit v1.2.3


From 03531606ef4cda25b629f500d1ffb6173b805c05 Mon Sep 17 00:00:00 2001
From: Francois Gervais <fgervais@distech-controls.com>
Date: Wed, 10 Mar 2021 16:10:26 -0500
Subject: rtc: pcf85063: fallback to parent of_node

The rtc device node is always NULL.

Since v5.12-rc1-dontuse/3c9ea42802a1fbf7ef29660ff8c6e526c58114f6 this
will lead to a NULL pointer dereference.

To fix this use the parent node which is the i2c client node as set by
devm_rtc_allocate_device().

Using the i2c client node seems to be what other similar drivers do
e.g. rtc-pcf8563.c.

Signed-off-by: Francois Gervais <fgervais@distech-controls.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210310211026.27299-1-fgervais@distech-controls.com
---
 drivers/rtc/rtc-pcf85063.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-pcf85063.c b/drivers/rtc/rtc-pcf85063.c
index aef6c1ee8bb0..82becae14229 100644
--- a/drivers/rtc/rtc-pcf85063.c
+++ b/drivers/rtc/rtc-pcf85063.c
@@ -478,6 +478,7 @@ static struct clk *pcf85063_clkout_register_clk(struct pcf85063 *pcf85063)
 {
 	struct clk *clk;
 	struct clk_init_data init;
+	struct device_node *node = pcf85063->rtc->dev.parent->of_node;
 
 	init.name = "pcf85063-clkout";
 	init.ops = &pcf85063_clkout_ops;
@@ -487,15 +488,13 @@ static struct clk *pcf85063_clkout_register_clk(struct pcf85063 *pcf85063)
 	pcf85063->clkout_hw.init = &init;
 
 	/* optional override of the clockname */
-	of_property_read_string(pcf85063->rtc->dev.of_node,
-				"clock-output-names", &init.name);
+	of_property_read_string(node, "clock-output-names", &init.name);
 
 	/* register the clock */
 	clk = devm_clk_register(&pcf85063->rtc->dev, &pcf85063->clkout_hw);
 
 	if (!IS_ERR(clk))
-		of_clk_add_provider(pcf85063->rtc->dev.of_node,
-				    of_clk_src_simple_get, clk);
+		of_clk_add_provider(node, of_clk_src_simple_get, clk);
 
 	return clk;
 }
-- 
cgit v1.2.3


From f1d304766c7f5388239d273fc0b72efa62acd9ca Mon Sep 17 00:00:00 2001
From: Liam Beguin <lvb@xiphos.com>
Date: Wed, 7 Apr 2021 22:40:26 -0400
Subject: rtc: ab-eoz9: set regmap max_register

Set regmap's max_register property to allow users to dump registers
using debufgs.

Signed-off-by: Liam Beguin <lvb@xiphos.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210408024028.3526564-2-liambeguin@gmail.com
---
 drivers/rtc/rtc-ab-eoz9.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-ab-eoz9.c b/drivers/rtc/rtc-ab-eoz9.c
index b20d8f26dcdb..dee17a76a72b 100644
--- a/drivers/rtc/rtc-ab-eoz9.c
+++ b/drivers/rtc/rtc-ab-eoz9.c
@@ -264,6 +264,7 @@ static const struct rtc_class_ops rtc_ops = {
 static const struct regmap_config abeoz9_rtc_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
+	.max_register = 0x3f,
 };
 
 #if IS_REACHABLE(CONFIG_HWMON)
-- 
cgit v1.2.3


From e70e52e1bf1d6d0ea60e2f8294d5e76a8d8f5370 Mon Sep 17 00:00:00 2001
From: Liam Beguin <lvb@xiphos.com>
Date: Wed, 7 Apr 2021 22:40:27 -0400
Subject: rtc: ab-eoz9: add alarm support

Add alarm support for the rtc-ab-eoz9.

Signed-off-by: Liam Beguin <lvb@xiphos.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210408024028.3526564-3-liambeguin@gmail.com
---
 drivers/rtc/rtc-ab-eoz9.c | 136 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-ab-eoz9.c b/drivers/rtc/rtc-ab-eoz9.c
index dee17a76a72b..7dc96fabc76f 100644
--- a/drivers/rtc/rtc-ab-eoz9.c
+++ b/drivers/rtc/rtc-ab-eoz9.c
@@ -11,6 +11,7 @@
 #include <linux/bcd.h>
 #include <linux/of.h>
 #include <linux/regmap.h>
+#include <linux/bitfield.h>
 #include <linux/hwmon.h>
 #include <linux/hwmon-sysfs.h>
 
@@ -57,6 +58,24 @@
 
 #define ABEOZ9_SEC_LEN			7
 
+#define ABEOZ9_REG_ALARM_SEC		0x10
+#define ABEOZ9_BIT_ALARM_SEC		GENMASK(6, 0)
+#define ABEOZ9_REG_ALARM_MIN		0x11
+#define ABEOZ9_BIT_ALARM_MIN		GENMASK(6, 0)
+#define ABEOZ9_REG_ALARM_HOURS		0x12
+#define ABEOZ9_BIT_ALARM_HOURS_PM	BIT(5)
+#define ABEOZ9_BIT_ALARM_HOURS		GENMASK(4, 0)
+#define ABEOZ9_REG_ALARM_DAYS		0x13
+#define ABEOZ9_BIT_ALARM_DAYS		GENMASK(5, 0)
+#define ABEOZ9_REG_ALARM_WEEKDAYS	0x14
+#define ABEOZ9_BIT_ALARM_WEEKDAYS	GENMASK(2, 0)
+#define ABEOZ9_REG_ALARM_MONTHS		0x15
+#define ABEOZ9_BIT_ALARM_MONTHS		GENMASK(4, 0)
+#define ABEOZ9_REG_ALARM_YEARS		0x16
+
+#define ABEOZ9_ALARM_LEN		7
+#define ABEOZ9_BIT_ALARM_AE		BIT(7)
+
 #define ABEOZ9_REG_REG_TEMP		0x20
 #define ABEOZ953_TEMP_MAX		120
 #define ABEOZ953_TEMP_MIN		-60
@@ -186,6 +205,98 @@ static int abeoz9_rtc_set_time(struct device *dev, struct rtc_time *tm)
 	return abeoz9_reset_validity(regmap);
 }
 
+static int abeoz9_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
+{
+	struct abeoz9_rtc_data *data = dev_get_drvdata(dev);
+	struct regmap *regmap = data->regmap;
+	u8 regs[ABEOZ9_ALARM_LEN];
+	u8 val[2];
+	int ret;
+
+	ret = abeoz9_check_validity(dev);
+	if (ret)
+		return ret;
+
+	ret = regmap_bulk_read(regmap, ABEOZ9_REG_CTRL_INT, val, sizeof(val));
+	if (ret)
+		return ret;
+
+	alarm->enabled = val[0] & ABEOZ9_REG_CTRL_INT_AIE;
+	alarm->pending = val[1] & ABEOZ9_REG_CTRL_INT_FLAG_AF;
+
+	ret = regmap_bulk_read(regmap, ABEOZ9_REG_ALARM_SEC, regs, sizeof(regs));
+	if (ret)
+		return ret;
+
+	alarm->time.tm_sec = bcd2bin(FIELD_GET(ABEOZ9_BIT_ALARM_SEC, regs[0]));
+	alarm->time.tm_min = bcd2bin(FIELD_GET(ABEOZ9_BIT_ALARM_MIN, regs[1]));
+	alarm->time.tm_hour = bcd2bin(FIELD_GET(ABEOZ9_BIT_ALARM_HOURS, regs[2]));
+	if (FIELD_GET(ABEOZ9_BIT_ALARM_HOURS_PM, regs[2]))
+		alarm->time.tm_hour += 12;
+
+	alarm->time.tm_mday = bcd2bin(FIELD_GET(ABEOZ9_BIT_ALARM_DAYS, regs[3]));
+
+	return 0;
+}
+
+static int abeoz9_rtc_alarm_irq_enable(struct device *dev, u32 enable)
+{
+	struct abeoz9_rtc_data *data = dev_get_drvdata(dev);
+
+	return regmap_update_bits(data->regmap, ABEOZ9_REG_CTRL_INT,
+				  ABEOZ9_REG_CTRL_INT_AIE,
+				  FIELD_PREP(ABEOZ9_REG_CTRL_INT_AIE, enable));
+}
+
+static int abeoz9_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
+{
+	struct abeoz9_rtc_data *data = dev_get_drvdata(dev);
+	u8 regs[ABEOZ9_ALARM_LEN] = {0};
+	int ret;
+
+	ret = regmap_update_bits(data->regmap, ABEOZ9_REG_CTRL_INT_FLAG,
+				 ABEOZ9_REG_CTRL_INT_FLAG_AF, 0);
+	if (ret)
+		return ret;
+
+	regs[0] = ABEOZ9_BIT_ALARM_AE | FIELD_PREP(ABEOZ9_BIT_ALARM_SEC,
+						   bin2bcd(alarm->time.tm_sec));
+	regs[1] = ABEOZ9_BIT_ALARM_AE | FIELD_PREP(ABEOZ9_BIT_ALARM_MIN,
+						   bin2bcd(alarm->time.tm_min));
+	regs[2] = ABEOZ9_BIT_ALARM_AE | FIELD_PREP(ABEOZ9_BIT_ALARM_HOURS,
+						   bin2bcd(alarm->time.tm_hour));
+	regs[3] = ABEOZ9_BIT_ALARM_AE | FIELD_PREP(ABEOZ9_BIT_ALARM_DAYS,
+						   bin2bcd(alarm->time.tm_mday));
+
+	ret = regmap_bulk_write(data->regmap, ABEOZ9_REG_ALARM_SEC, regs,
+				sizeof(regs));
+	if (ret)
+		return ret;
+
+	return abeoz9_rtc_alarm_irq_enable(dev, alarm->enabled);
+}
+
+static irqreturn_t abeoz9_rtc_irq(int irq, void *dev)
+{
+	struct abeoz9_rtc_data *data = dev_get_drvdata(dev);
+	unsigned int val;
+	int ret;
+
+	ret = regmap_read(data->regmap, ABEOZ9_REG_CTRL_INT_FLAG, &val);
+	if (ret)
+		return IRQ_NONE;
+
+	if (!FIELD_GET(ABEOZ9_REG_CTRL_INT_FLAG_AF, val))
+		return IRQ_NONE;
+
+	regmap_update_bits(data->regmap, ABEOZ9_REG_CTRL_INT_FLAG,
+			   ABEOZ9_REG_CTRL_INT_FLAG_AF, 0);
+
+	rtc_update_irq(data->rtc, 1, RTC_IRQF | RTC_AF);
+
+	return IRQ_HANDLED;
+}
+
 static int abeoz9_trickle_parse_dt(struct device_node *node)
 {
 	u32 ohms = 0;
@@ -261,6 +372,14 @@ static const struct rtc_class_ops rtc_ops = {
 	.set_time  = abeoz9_rtc_set_time,
 };
 
+static const struct rtc_class_ops rtc_alarm_ops = {
+	.read_time = abeoz9_rtc_get_time,
+	.set_time = abeoz9_rtc_set_time,
+	.read_alarm = abeoz9_rtc_read_alarm,
+	.set_alarm = abeoz9_rtc_set_alarm,
+	.alarm_irq_enable = abeoz9_rtc_alarm_irq_enable,
+};
+
 static const struct regmap_config abeoz9_rtc_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
@@ -420,6 +539,23 @@ static int abeoz9_probe(struct i2c_client *client,
 	data->rtc->ops = &rtc_ops;
 	data->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
 	data->rtc->range_max = RTC_TIMESTAMP_END_2099;
+	data->rtc->uie_unsupported = 1;
+
+	if (client->irq > 0) {
+		ret = devm_request_threaded_irq(dev, client->irq, NULL,
+						abeoz9_rtc_irq,
+						IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+						dev_name(dev), dev);
+		if (ret) {
+			dev_err(dev, "failed to request alarm irq\n");
+			return ret;
+		}
+	}
+
+	if (client->irq > 0 || device_property_read_bool(dev, "wakeup-source")) {
+		ret = device_init_wakeup(dev, true);
+		data->rtc->ops = &rtc_alarm_ops;
+	}
 
 	ret = devm_rtc_register_device(data->rtc);
 	if (ret)
-- 
cgit v1.2.3


From c52409eb16672907804b7acf1658bb1fd9dcb426 Mon Sep 17 00:00:00 2001
From: Liam Beguin <lvb@xiphos.com>
Date: Wed, 7 Apr 2021 22:40:28 -0400
Subject: rtc: ab-eoz9: make use of RTC_FEATURE_ALARM

Move the alarm callbacks in rtc_ops and use RTC_FEATURE_ALARM to notify
the core whether alarm capabilities are available or not.

Signed-off-by: Liam Beguin <lvb@xiphos.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210408024028.3526564-4-liambeguin@gmail.com
---
 drivers/rtc/rtc-ab-eoz9.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-ab-eoz9.c b/drivers/rtc/rtc-ab-eoz9.c
index 7dc96fabc76f..a9b355510cd4 100644
--- a/drivers/rtc/rtc-ab-eoz9.c
+++ b/drivers/rtc/rtc-ab-eoz9.c
@@ -368,11 +368,6 @@ static int abeoz9_rtc_setup(struct device *dev, struct device_node *node)
 }
 
 static const struct rtc_class_ops rtc_ops = {
-	.read_time = abeoz9_rtc_get_time,
-	.set_time  = abeoz9_rtc_set_time,
-};
-
-static const struct rtc_class_ops rtc_alarm_ops = {
 	.read_time = abeoz9_rtc_get_time,
 	.set_time = abeoz9_rtc_set_time,
 	.read_alarm = abeoz9_rtc_read_alarm,
@@ -540,6 +535,7 @@ static int abeoz9_probe(struct i2c_client *client,
 	data->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
 	data->rtc->range_max = RTC_TIMESTAMP_END_2099;
 	data->rtc->uie_unsupported = 1;
+	clear_bit(RTC_FEATURE_ALARM, data->rtc->features);
 
 	if (client->irq > 0) {
 		ret = devm_request_threaded_irq(dev, client->irq, NULL,
@@ -554,7 +550,7 @@ static int abeoz9_probe(struct i2c_client *client,
 
 	if (client->irq > 0 || device_property_read_bool(dev, "wakeup-source")) {
 		ret = device_init_wakeup(dev, true);
-		data->rtc->ops = &rtc_alarm_ops;
+		set_bit(RTC_FEATURE_ALARM, data->rtc->features);
 	}
 
 	ret = devm_rtc_register_device(data->rtc);
-- 
cgit v1.2.3


From c8f0ca8b7a4b91f637ccd9a55f37dbac73d6f6bf Mon Sep 17 00:00:00 2001
From: satya priya <skakit@codeaurora.org>
Date: Fri, 9 Apr 2021 19:29:23 +0530
Subject: rtc: pm8xxx: Add RTC support for PMIC PMK8350

Add the comaptible string for PMIC PMK8350.

Signed-off-by: satya priya <skakit@codeaurora.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/1617976766-7852-2-git-send-email-skakit@codeaurora.org
---
 drivers/rtc/rtc-pm8xxx.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-pm8xxx.c b/drivers/rtc/rtc-pm8xxx.c
index eb206597a8fa..29a1c65661e9 100644
--- a/drivers/rtc/rtc-pm8xxx.c
+++ b/drivers/rtc/rtc-pm8xxx.c
@@ -445,6 +445,16 @@ static const struct pm8xxx_rtc_regs pm8941_regs = {
 	.alarm_en	= BIT(7),
 };
 
+static const struct pm8xxx_rtc_regs pmk8350_regs = {
+	.ctrl		= 0x6146,
+	.write		= 0x6140,
+	.read		= 0x6148,
+	.alarm_rw	= 0x6240,
+	.alarm_ctrl	= 0x6246,
+	.alarm_ctrl2	= 0x6248,
+	.alarm_en	= BIT(7),
+};
+
 /*
  * Hardcoded RTC bases until IORESOURCE_REG mapping is figured out
  */
@@ -453,6 +463,7 @@ static const struct of_device_id pm8xxx_id_table[] = {
 	{ .compatible = "qcom,pm8018-rtc", .data = &pm8921_regs },
 	{ .compatible = "qcom,pm8058-rtc", .data = &pm8058_regs },
 	{ .compatible = "qcom,pm8941-rtc", .data = &pm8941_regs },
+	{ .compatible = "qcom,pmk8350-rtc", .data = &pmk8350_regs },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, pm8xxx_id_table);
-- 
cgit v1.2.3


From 880f25d690150937e42a2e8b86c111aae8da6d08 Mon Sep 17 00:00:00 2001
From: Tian Tao <tiantao6@hisilicon.com>
Date: Mon, 15 Mar 2021 10:39:30 +0800
Subject: rtc: rtc-spear: replace spin_lock_irqsave by spin_lock in hard IRQ

The code has been in a irq-disabled context since it is hard IRQ. There
is no necessity to do it again.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/1615775970-59070-1-git-send-email-tiantao6@hisilicon.com
---
 drivers/rtc/rtc-spear.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-spear.c b/drivers/rtc/rtc-spear.c
index 833daeb7b60e..ee721e53c155 100644
--- a/drivers/rtc/rtc-spear.c
+++ b/drivers/rtc/rtc-spear.c
@@ -153,12 +153,12 @@ static void rtc_wait_not_busy(struct spear_rtc_config *config)
 static irqreturn_t spear_rtc_irq(int irq, void *dev_id)
 {
 	struct spear_rtc_config *config = dev_id;
-	unsigned long flags, events = 0;
+	unsigned long events = 0;
 	unsigned int irq_data;
 
-	spin_lock_irqsave(&config->lock, flags);
+	spin_lock(&config->lock);
 	irq_data = readl(config->ioaddr + STATUS_REG);
-	spin_unlock_irqrestore(&config->lock, flags);
+	spin_unlock(&config->lock);
 
 	if ((irq_data & RTC_INT_MASK)) {
 		spear_rtc_clear_interrupt(config);
-- 
cgit v1.2.3


From 7fcb86185978661c9188397d474f90364745b8d9 Mon Sep 17 00:00:00 2001
From: Michael Walle <michael@walle.cc>
Date: Wed, 14 Apr 2021 10:40:06 +0200
Subject: rtc: fsl-ftm-alarm: add MODULE_TABLE()

The module doesn't load automatically. Fix it by adding the missing
MODULE_TABLE().

Fixes: 7b0b551dbc1e ("rtc: fsl-ftm-alarm: add FTM alarm driver")
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210414084006.17933-1-michael@walle.cc
---
 drivers/rtc/rtc-fsl-ftm-alarm.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-fsl-ftm-alarm.c b/drivers/rtc/rtc-fsl-ftm-alarm.c
index 57cc09d0a806..c0df49fb978c 100644
--- a/drivers/rtc/rtc-fsl-ftm-alarm.c
+++ b/drivers/rtc/rtc-fsl-ftm-alarm.c
@@ -310,6 +310,7 @@ static const struct of_device_id ftm_rtc_match[] = {
 	{ .compatible = "fsl,lx2160a-ftm-alarm", },
 	{ },
 };
+MODULE_DEVICE_TABLE(of, ftm_rtc_match);
 
 static const struct acpi_device_id ftm_imx_acpi_ids[] = {
 	{"NXP0014",},
-- 
cgit v1.2.3


From 9b9310445f5a6741399ebe2ba08137fecd7f73f9 Mon Sep 17 00:00:00 2001
From: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Date: Thu, 15 Apr 2021 16:37:01 +0800
Subject: rtc: ds1511: remove unused function

Fix the following clang warning:

drivers/rtc/rtc-ds1511.c:108:1: warning: unused function
'rtc_write_alarm' [-Wunused-function].

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/1618475821-102974-1-git-send-email-jiapeng.chong@linux.alibaba.com
---
 drivers/rtc/rtc-ds1511.c | 6 ------
 1 file changed, 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-ds1511.c b/drivers/rtc/rtc-ds1511.c
index bda884333082..1109cad83838 100644
--- a/drivers/rtc/rtc-ds1511.c
+++ b/drivers/rtc/rtc-ds1511.c
@@ -104,12 +104,6 @@ rtc_write(uint8_t val, uint32_t reg)
 	writeb(val, ds1511_base + (reg * reg_spacing));
 }
 
-static inline void
-rtc_write_alarm(uint8_t val, enum ds1511reg reg)
-{
-	rtc_write((val | 0x80), reg);
-}
-
 static noinline uint8_t
 rtc_read(enum ds1511reg reg)
 {
-- 
cgit v1.2.3


From a2149ab815fce21d0d83082818116519e44f87be Mon Sep 17 00:00:00 2001
From: Konrad Dybcio <konrad.dybcio@somainline.org>
Date: Fri, 19 Mar 2021 23:08:02 +0100
Subject: thermal/drivers/qcom/tsens-v0_1: Add support for MDM9607

MDM9607 TSENS IP is very similar to the one of MSM8916, with
minor adjustments to various tuning values.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Acked-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210319220802.198215-2-konrad.dybcio@somainline.org
---
 drivers/thermal/qcom/tsens-v0_1.c | 98 ++++++++++++++++++++++++++++++++++++++-
 drivers/thermal/qcom/tsens.c      |  3 ++
 drivers/thermal/qcom/tsens.h      |  2 +-
 3 files changed, 101 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/qcom/tsens-v0_1.c b/drivers/thermal/qcom/tsens-v0_1.c
index 4ffa2e2c0145..f136cb350238 100644
--- a/drivers/thermal/qcom/tsens-v0_1.c
+++ b/drivers/thermal/qcom/tsens-v0_1.c
@@ -190,6 +190,39 @@
 
 #define BIT_APPEND		0x3
 
+/* eeprom layout data for mdm9607 */
+#define MDM9607_BASE0_MASK	0x000000ff
+#define MDM9607_BASE1_MASK	0x000ff000
+#define MDM9607_BASE0_SHIFT	0
+#define MDM9607_BASE1_SHIFT	12
+
+#define MDM9607_S0_P1_MASK	0x00003f00
+#define MDM9607_S1_P1_MASK	0x03f00000
+#define MDM9607_S2_P1_MASK	0x0000003f
+#define MDM9607_S3_P1_MASK	0x0003f000
+#define MDM9607_S4_P1_MASK	0x0000003f
+
+#define MDM9607_S0_P2_MASK	0x000fc000
+#define MDM9607_S1_P2_MASK	0xfc000000
+#define MDM9607_S2_P2_MASK	0x00000fc0
+#define MDM9607_S3_P2_MASK	0x00fc0000
+#define MDM9607_S4_P2_MASK	0x00000fc0
+
+#define MDM9607_S0_P1_SHIFT	8
+#define MDM9607_S1_P1_SHIFT	20
+#define MDM9607_S2_P1_SHIFT	0
+#define MDM9607_S3_P1_SHIFT	12
+#define MDM9607_S4_P1_SHIFT	0
+
+#define MDM9607_S0_P2_SHIFT	14
+#define MDM9607_S1_P2_SHIFT	26
+#define MDM9607_S2_P2_SHIFT	6
+#define MDM9607_S3_P2_SHIFT	18
+#define MDM9607_S4_P2_SHIFT	6
+
+#define MDM9607_CAL_SEL_MASK	0x00700000
+#define MDM9607_CAL_SEL_SHIFT	20
+
 static int calibrate_8916(struct tsens_priv *priv)
 {
 	int base0 = 0, base1 = 0, i;
@@ -452,7 +485,56 @@ static int calibrate_8974(struct tsens_priv *priv)
 	return 0;
 }
 
-/* v0.1: 8916, 8939, 8974 */
+static int calibrate_9607(struct tsens_priv *priv)
+{
+	int base, i;
+	u32 p1[5], p2[5];
+	int mode = 0;
+	u32 *qfprom_cdata;
+
+	qfprom_cdata = (u32 *)qfprom_read(priv->dev, "calib");
+	if (IS_ERR(qfprom_cdata))
+		return PTR_ERR(qfprom_cdata);
+
+	mode = (qfprom_cdata[2] & MDM9607_CAL_SEL_MASK) >> MDM9607_CAL_SEL_SHIFT;
+	dev_dbg(priv->dev, "calibration mode is %d\n", mode);
+
+	switch (mode) {
+	case TWO_PT_CALIB:
+		base = (qfprom_cdata[2] & MDM9607_BASE1_MASK) >> MDM9607_BASE1_SHIFT;
+		p2[0] = (qfprom_cdata[0] & MDM9607_S0_P2_MASK) >> MDM9607_S0_P2_SHIFT;
+		p2[1] = (qfprom_cdata[0] & MDM9607_S1_P2_MASK) >> MDM9607_S1_P2_SHIFT;
+		p2[2] = (qfprom_cdata[1] & MDM9607_S2_P2_MASK) >> MDM9607_S2_P2_SHIFT;
+		p2[3] = (qfprom_cdata[1] & MDM9607_S3_P2_MASK) >> MDM9607_S3_P2_SHIFT;
+		p2[4] = (qfprom_cdata[2] & MDM9607_S4_P2_MASK) >> MDM9607_S4_P2_SHIFT;
+		for (i = 0; i < priv->num_sensors; i++)
+			p2[i] = ((base + p2[i]) << 2);
+		fallthrough;
+	case ONE_PT_CALIB2:
+		base = (qfprom_cdata[0] & MDM9607_BASE0_MASK);
+		p1[0] = (qfprom_cdata[0] & MDM9607_S0_P1_MASK) >> MDM9607_S0_P1_SHIFT;
+		p1[1] = (qfprom_cdata[0] & MDM9607_S1_P1_MASK) >> MDM9607_S1_P1_SHIFT;
+		p1[2] = (qfprom_cdata[1] & MDM9607_S2_P1_MASK) >> MDM9607_S2_P1_SHIFT;
+		p1[3] = (qfprom_cdata[1] & MDM9607_S3_P1_MASK) >> MDM9607_S3_P1_SHIFT;
+		p1[4] = (qfprom_cdata[2] & MDM9607_S4_P1_MASK) >> MDM9607_S4_P1_SHIFT;
+		for (i = 0; i < priv->num_sensors; i++)
+			p1[i] = ((base + p1[i]) << 2);
+		break;
+	default:
+		for (i = 0; i < priv->num_sensors; i++) {
+			p1[i] = 500;
+			p2[i] = 780;
+		}
+		break;
+	}
+
+	compute_intercept_slope(priv, p1, p2, mode);
+	kfree(qfprom_cdata);
+
+	return 0;
+}
+
+/* v0.1: 8916, 8939, 8974, 9607 */
 
 static struct tsens_features tsens_v0_1_feat = {
 	.ver_major	= VER_0_1,
@@ -540,3 +622,17 @@ struct tsens_plat_data data_8974 = {
 	.feat		= &tsens_v0_1_feat,
 	.fields	= tsens_v0_1_regfields,
 };
+
+static const struct tsens_ops ops_9607 = {
+	.init		= init_common,
+	.calibrate	= calibrate_9607,
+	.get_temp	= get_temp_common,
+};
+
+struct tsens_plat_data data_9607 = {
+	.num_sensors	= 5,
+	.ops		= &ops_9607,
+	.hw_ids		= (unsigned int []){ 0, 1, 2, 3, 4 },
+	.feat		= &tsens_v0_1_feat,
+	.fields	= tsens_v0_1_regfields,
+};
diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index 3c4c0516e58a..a5da6a74a465 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -897,6 +897,9 @@ static SIMPLE_DEV_PM_OPS(tsens_pm_ops, tsens_suspend, tsens_resume);
 
 static const struct of_device_id tsens_table[] = {
 	{
+		.compatible = "qcom,mdm9607-tsens",
+		.data = &data_9607,
+	}, {
 		.compatible = "qcom,msm8916-tsens",
 		.data = &data_8916,
 	}, {
diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
index f40b625f897e..cba64c33b4f9 100644
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -585,7 +585,7 @@ int get_temp_common(const struct tsens_sensor *s, int *temp);
 extern struct tsens_plat_data data_8960;
 
 /* TSENS v0.1 targets */
-extern struct tsens_plat_data data_8916, data_8939, data_8974;
+extern struct tsens_plat_data data_8916, data_8939, data_8974, data_9607;
 
 /* TSENS v1 targets */
 extern struct tsens_plat_data data_tsens_v1, data_8976;
-- 
cgit v1.2.3


From 8cd7ab2a1a393f37f2e2f4b3ff595d98c245b854 Mon Sep 17 00:00:00 2001
From: Ruiqi Gong <gongruiqi1@huawei.com>
Date: Thu, 8 Apr 2021 06:01:44 -0400
Subject: thermal/drivers/thermal_mmio: Remove redundant dev_err call in
 thermal_mmio_probe()

There is a error message within devm_ioremap_resource already, so
remove the dev_err call to avoid redundant error message.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Ruiqi Gong <gongruiqi1@huawei.com>
Acked-by: Talel Shenhar <talel@amazon.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210408100144.7494-1-gongruiqi1@huawei.com
---
 drivers/thermal/thermal_mmio.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/thermal_mmio.c b/drivers/thermal/thermal_mmio.c
index d0bdf1ea3331..ded1dd0d4ef7 100644
--- a/drivers/thermal/thermal_mmio.c
+++ b/drivers/thermal/thermal_mmio.c
@@ -54,11 +54,8 @@ static int thermal_mmio_probe(struct platform_device *pdev)
 
 	resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	sensor->mmio_base = devm_ioremap_resource(&pdev->dev, resource);
-	if (IS_ERR(sensor->mmio_base)) {
-		dev_err(&pdev->dev, "failed to ioremap memory (%ld)\n",
-			PTR_ERR(sensor->mmio_base));
+	if (IS_ERR(sensor->mmio_base))
 		return PTR_ERR(sensor->mmio_base);
-	}
 
 	sensor_init_func = device_get_match_data(&pdev->dev);
 	if (sensor_init_func) {
-- 
cgit v1.2.3


From d1ab7c3a33d27e7b63fd6207d88852561072ae36 Mon Sep 17 00:00:00 2001
From: Ruiqi Gong <gongruiqi1@huawei.com>
Date: Thu, 8 Apr 2021 06:03:29 -0400
Subject: thermal/drivers/bcm2835: Remove redundant dev_err call in
 bcm2835_thermal_probe()

There is a error message within devm_ioremap_resource already, so
remove the dev_err call to avoid redundant error message.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Ruiqi Gong <gongruiqi1@huawei.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210408100329.7585-1-gongruiqi1@huawei.com
---
 drivers/thermal/broadcom/bcm2835_thermal.c | 1 -
 1 file changed, 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/thermal/broadcom/bcm2835_thermal.c b/drivers/thermal/broadcom/bcm2835_thermal.c
index 3199977f1e73..c8e4344d5a3d 100644
--- a/drivers/thermal/broadcom/bcm2835_thermal.c
+++ b/drivers/thermal/broadcom/bcm2835_thermal.c
@@ -184,7 +184,6 @@ static int bcm2835_thermal_probe(struct platform_device *pdev)
 	data->regs = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(data->regs)) {
 		err = PTR_ERR(data->regs);
-		dev_err(&pdev->dev, "Could not get registers: %d\n", err);
 		return err;
 	}
 
-- 
cgit v1.2.3


From 2eb87d75f980bcc7c2bd370661f8fcc4ec273ea5 Mon Sep 17 00:00:00 2001
From: Zhang Rui <rui.zhang@intel.com>
Date: Mon, 12 Apr 2021 20:59:01 +0800
Subject: thermal/drivers/intel: Introduce tcc cooling driver

On Intel processors, the core frequency can be reduced below OS request,
when the current temperature reaches the TCC (Thermal Control Circuit)
activation temperature.

The default TCC activation temperature is specified by
MSR_IA32_TEMPERATURE_TARGET. However, it can be adjusted by specifying an
offset in degrees C, using the TCC Offset bits in the same MSR register.

This patch introduces a cooling devices driver that utilizes the TCC
Offset feature. The bigger the current cooling state is, the lower the
effective TCC activation temperature is, so that the processors can be
throttled earlier before system critical overheats.

Note that, on different platforms, the behavior might be different on
how fast the setting takes effect, and how much the CPU frequency is
reduced.

This patch has been tested on a KabyLake mobile platform from me, and also
on a CometLake platform from Doug.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested by: Doug Smythies <dsmythies@telus.net>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210412125901.12549-1-rui.zhang@intel.com
---
 drivers/thermal/intel/Kconfig             |  11 +++
 drivers/thermal/intel/Makefile            |   1 +
 drivers/thermal/intel/intel_tcc_cooling.c | 129 ++++++++++++++++++++++++++++++
 3 files changed, 141 insertions(+)
 create mode 100644 drivers/thermal/intel/intel_tcc_cooling.c

(limited to 'drivers')

diff --git a/drivers/thermal/intel/Kconfig b/drivers/thermal/intel/Kconfig
index ce4f59213c7a..e4299ca3423c 100644
--- a/drivers/thermal/intel/Kconfig
+++ b/drivers/thermal/intel/Kconfig
@@ -79,3 +79,14 @@ config INTEL_PCH_THERMAL
 	  Enable this to support thermal reporting on certain intel PCHs.
 	  Thermal reporting device will provide temperature reading,
 	  programmable trip points and other information.
+
+config INTEL_TCC_COOLING
+	tristate "Intel TCC offset cooling Driver"
+	depends on X86
+	help
+	  Enable this to support system cooling by adjusting the effective TCC
+	  activation temperature via the TCC Offset register, which is widely
+	  supported on modern Intel platforms.
+	  Note that, on different platforms, the behavior might be different
+	  on how fast the setting takes effect, and how much the CPU frequency
+	  is reduced.
diff --git a/drivers/thermal/intel/Makefile b/drivers/thermal/intel/Makefile
index ff2ad30ef397..5ff2afa388f7 100644
--- a/drivers/thermal/intel/Makefile
+++ b/drivers/thermal/intel/Makefile
@@ -10,4 +10,5 @@ obj-$(CONFIG_INTEL_QUARK_DTS_THERMAL)	+= intel_quark_dts_thermal.o
 obj-$(CONFIG_INT340X_THERMAL)  += int340x_thermal/
 obj-$(CONFIG_INTEL_BXT_PMIC_THERMAL) += intel_bxt_pmic_thermal.o
 obj-$(CONFIG_INTEL_PCH_THERMAL)	+= intel_pch_thermal.o
+obj-$(CONFIG_INTEL_TCC_COOLING)	+= intel_tcc_cooling.o
 obj-$(CONFIG_X86_THERMAL_VECTOR) += therm_throt.o
diff --git a/drivers/thermal/intel/intel_tcc_cooling.c b/drivers/thermal/intel/intel_tcc_cooling.c
new file mode 100644
index 000000000000..8ec10d55d421
--- /dev/null
+++ b/drivers/thermal/intel/intel_tcc_cooling.c
@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * cooling device driver that activates the processor throttling by
+ * programming the TCC Offset register.
+ * Copyright (c) 2021, Intel Corporation.
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/thermal.h>
+#include <asm/cpu_device_id.h>
+
+#define TCC_SHIFT 24
+#define TCC_MASK	(0x3fULL<<24)
+#define TCC_PROGRAMMABLE	BIT(30)
+
+static struct thermal_cooling_device *tcc_cdev;
+
+static int tcc_get_max_state(struct thermal_cooling_device *cdev, unsigned long
+			     *state)
+{
+	*state = TCC_MASK >> TCC_SHIFT;
+	return 0;
+}
+
+static int tcc_offset_update(int tcc)
+{
+	u64 val;
+	int err;
+
+	err = rdmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, &val);
+	if (err)
+		return err;
+
+	val &= ~TCC_MASK;
+	val |= tcc << TCC_SHIFT;
+
+	err = wrmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, val);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static int tcc_get_cur_state(struct thermal_cooling_device *cdev, unsigned long
+			     *state)
+{
+	u64 val;
+	int err;
+
+	err = rdmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, &val);
+	if (err)
+		return err;
+
+	*state = (val & TCC_MASK) >> TCC_SHIFT;
+	return 0;
+}
+
+static int tcc_set_cur_state(struct thermal_cooling_device *cdev, unsigned long
+			     state)
+{
+	return tcc_offset_update(state);
+}
+
+static const struct thermal_cooling_device_ops tcc_cooling_ops = {
+	.get_max_state = tcc_get_max_state,
+	.get_cur_state = tcc_get_cur_state,
+	.set_cur_state = tcc_set_cur_state,
+};
+
+static const struct x86_cpu_id tcc_ids[] __initconst = {
+	X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE, NULL),
+	X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE_L, NULL),
+	X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE, NULL),
+	X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE_L, NULL),
+	X86_MATCH_INTEL_FAM6_MODEL(ICELAKE, NULL),
+	X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_L, NULL),
+	X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE, NULL),
+	X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE_L, NULL),
+	X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE, NULL),
+	{}
+};
+
+MODULE_DEVICE_TABLE(x86cpu, tcc_ids);
+
+static int __init tcc_cooling_init(void)
+{
+	int ret;
+	u64 val;
+	const struct x86_cpu_id *id;
+
+	int err;
+
+	id = x86_match_cpu(tcc_ids);
+	if (!id)
+		return -ENODEV;
+
+	err = rdmsrl_safe(MSR_PLATFORM_INFO, &val);
+	if (err)
+		return err;
+
+	if (!(val & TCC_PROGRAMMABLE))
+		return -ENODEV;
+
+	pr_info("Programmable TCC Offset detected\n");
+
+	tcc_cdev =
+	    thermal_cooling_device_register("TCC Offset", NULL,
+					    &tcc_cooling_ops);
+	if (IS_ERR(tcc_cdev)) {
+		ret = PTR_ERR(tcc_cdev);
+		return ret;
+	}
+	return 0;
+}
+
+module_init(tcc_cooling_init)
+
+static void __exit tcc_cooling_exit(void)
+{
+	thermal_cooling_device_unregister(tcc_cdev);
+}
+
+module_exit(tcc_cooling_exit)
+
+MODULE_DESCRIPTION("TCC offset cooling device Driver");
+MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>");
+MODULE_LICENSE("GPL v2");
-- 
cgit v1.2.3


From beaa41029fdea9d3e01af3a1a800538542d30869 Mon Sep 17 00:00:00 2001
From: Ye Bin <yebin10@huawei.com>
Date: Fri, 9 Apr 2021 15:52:24 +0800
Subject: thermal/drivers/hisi: Remove redundant dev_err call in
 hisi_thermal_probe()

There is a error message within devm_ioremap_resource
already, so remove the dev_err call to avoid redundant
error message.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Ye Bin <yebin10@huawei.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210409075224.2109503-1-yebin10@huawei.com
---
 drivers/thermal/hisi_thermal.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/hisi_thermal.c b/drivers/thermal/hisi_thermal.c
index d902db9f267f..9a21ac0ceb11 100644
--- a/drivers/thermal/hisi_thermal.c
+++ b/drivers/thermal/hisi_thermal.c
@@ -572,10 +572,8 @@ static int hisi_thermal_probe(struct platform_device *pdev)
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	data->regs = devm_ioremap_resource(dev, res);
-	if (IS_ERR(data->regs)) {
-		dev_err(dev, "failed to get io address\n");
+	if (IS_ERR(data->regs))
 		return PTR_ERR(data->regs);
-	}
 
 	ret = data->ops->probe(data);
 	if (ret)
-- 
cgit v1.2.3


From fc88f7ad763a8ef2a20f8904bd241930b7696f86 Mon Sep 17 00:00:00 2001
From: dingsenjie <dingsenjie@yulong.com>
Date: Wed, 14 Apr 2021 14:39:43 +0800
Subject: thermal/drivers/tegra: Use devm_platform_ioremap_resource_byname

Use the devm_platform_ioremap_resource_byname() helper instead of
calling platform_get_resource_byname() and devm_ioremap_resource()
separately.

Signed-off-by: dingsenjie <dingsenjie@yulong.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210414063943.96244-1-dingsenjie@163.com
---
 drivers/thermal/tegra/soctherm.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/tegra/soctherm.c b/drivers/thermal/tegra/soctherm.c
index 8b8fbd49679b..8e303e9d1dc0 100644
--- a/drivers/thermal/tegra/soctherm.c
+++ b/drivers/thermal/tegra/soctherm.c
@@ -2118,7 +2118,6 @@ static int tegra_soctherm_probe(struct platform_device *pdev)
 	struct tegra_soctherm *tegra;
 	struct thermal_zone_device *z;
 	struct tsensor_shared_calib shared_calib;
-	struct resource *res;
 	struct tegra_soctherm_soc *soc;
 	unsigned int i;
 	int err;
@@ -2140,26 +2139,20 @@ static int tegra_soctherm_probe(struct platform_device *pdev)
 
 	tegra->soc = soc;
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-					   "soctherm-reg");
-	tegra->regs = devm_ioremap_resource(&pdev->dev, res);
+	tegra->regs = devm_platform_ioremap_resource_byname(pdev, "soctherm-reg");
 	if (IS_ERR(tegra->regs)) {
 		dev_err(&pdev->dev, "can't get soctherm registers");
 		return PTR_ERR(tegra->regs);
 	}
 
 	if (!tegra->soc->use_ccroc) {
-		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-						   "car-reg");
-		tegra->clk_regs = devm_ioremap_resource(&pdev->dev, res);
+		tegra->clk_regs = devm_platform_ioremap_resource_byname(pdev, "car-reg");
 		if (IS_ERR(tegra->clk_regs)) {
 			dev_err(&pdev->dev, "can't get car clk registers");
 			return PTR_ERR(tegra->clk_regs);
 		}
 	} else {
-		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-						   "ccroc-reg");
-		tegra->ccroc_regs = devm_ioremap_resource(&pdev->dev, res);
+		tegra->ccroc_regs = devm_platform_ioremap_resource_byname(pdev, "ccroc-reg");
 		if (IS_ERR(tegra->ccroc_regs)) {
 			dev_err(&pdev->dev, "can't get ccroc registers");
 			return PTR_ERR(tegra->ccroc_regs);
-- 
cgit v1.2.3


From 9cc742078c9a90cdd4cf131e9f760e6965df9048 Mon Sep 17 00:00:00 2001
From: Jianjun Wang <jianjun.wang@mediatek.com>
Date: Tue, 20 Apr 2021 14:17:18 +0800
Subject: PCI: Export pci_pio_to_address() for module use

This interface will be used by PCI host drivers for PIO translation,
export it to support compiling those drivers as kernel modules.

Link: https://lore.kernel.org/r/20210420061723.989-3-jianjun.wang@mediatek.com
Signed-off-by: Jianjun Wang <jianjun.wang@mediatek.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 16a17215f633..09f1714e23be 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4052,6 +4052,7 @@ phys_addr_t pci_pio_to_address(unsigned long pio)
 
 	return address;
 }
+EXPORT_SYMBOL_GPL(pci_pio_to_address);
 
 unsigned long __weak pci_address_to_pio(phys_addr_t address)
 {
-- 
cgit v1.2.3


From 0b0f93cf913b96f7a6f3d6b1ab5dc697d7b9d0f6 Mon Sep 17 00:00:00 2001
From: Felipe Balbi <felipe.balbi@microsoft.com>
Date: Sat, 17 Apr 2021 09:19:50 +0300
Subject: dt-bindings: dmaengine: qcom: gpi: add compatible for sm8150

No functional changes, just adding a new compatible for a diferent
SoC.

Signed-off-by: Felipe Balbi <felipe.balbi@microsoft.com>
Link: https://lore.kernel.org/r/20210417061951.2105530-2-balbi@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 Documentation/devicetree/bindings/dma/qcom,gpi.yaml | 1 +
 drivers/dma/qcom/gpi.c                              | 1 +
 2 files changed, 2 insertions(+)

(limited to 'drivers')

diff --git a/Documentation/devicetree/bindings/dma/qcom,gpi.yaml b/Documentation/devicetree/bindings/dma/qcom,gpi.yaml
index f8142adf9aea..902e2e523386 100644
--- a/Documentation/devicetree/bindings/dma/qcom,gpi.yaml
+++ b/Documentation/devicetree/bindings/dma/qcom,gpi.yaml
@@ -20,6 +20,7 @@ properties:
   compatible:
     enum:
       - qcom,sdm845-gpi-dma
+      - qcom,sm8150-gpi-dma
 
   reg:
     maxItems: 1
diff --git a/drivers/dma/qcom/gpi.c b/drivers/dma/qcom/gpi.c
index 57f5ee4235c7..43ac3ab23d4c 100644
--- a/drivers/dma/qcom/gpi.c
+++ b/drivers/dma/qcom/gpi.c
@@ -2281,6 +2281,7 @@ static int gpi_probe(struct platform_device *pdev)
 
 static const struct of_device_id gpi_of_match[] = {
 	{ .compatible = "qcom,sdm845-gpi-dma" },
+	{ .compatible = "qcom,sm8150-gpi-dma" },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, gpi_of_match);
-- 
cgit v1.2.3


From 28ac8e03c43dfc6a703aa420d18222540b801120 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Thu, 15 Apr 2021 12:06:54 +0100
Subject: dmaengine: idxd: Fix potential null dereference on pointer status

There are calls to idxd_cmd_exec that pass a null status pointer however
a recent commit has added an assignment to *status that can end up
with a null pointer dereference.  The function expects a null status
pointer sometimes as there is a later assignment to *status where
status is first null checked.  Fix the issue by null checking status
before making the assignment.

Addresses-Coverity: ("Explicit null dereferenced")
Fixes: 89e3becd8f82 ("dmaengine: idxd: check device state before issue command")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20210415110654.1941580-1-colin.king@canonical.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/device.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 84a6ea60ecf0..90b875b15c13 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -445,7 +445,8 @@ static void idxd_cmd_exec(struct idxd_device *idxd, int cmd_code, u32 operand,
 
 	if (idxd_device_is_halted(idxd)) {
 		dev_warn(&idxd->pdev->dev, "Device is HALTED!\n");
-		*status = IDXD_CMDSTS_HW_ERR;
+		if (status)
+			*status = IDXD_CMDSTS_HW_ERR;
 		return;
 	}
 
-- 
cgit v1.2.3


From 361e5fc7420ab56e4a940b8a500207a91830cd32 Mon Sep 17 00:00:00 2001
From: YueHaibing <yuehaibing@huawei.com>
Date: Wed, 7 Apr 2021 21:25:43 +0800
Subject: dmaengine: at_xdmac: Remove unused inline function at_xdmac_csize()

commit 765c37d87669 ("dmaengine: at_xdmac: rework slave configuration part")
left behind this, so can remove it.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Link: https://lore.kernel.org/r/20210407132543.23652-1-yuehaibing@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/at_xdmac.c | 11 -----------
 1 file changed, 11 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c
index fe45ad5d06c4..64a52bf4d737 100644
--- a/drivers/dma/at_xdmac.c
+++ b/drivers/dma/at_xdmac.c
@@ -344,17 +344,6 @@ static inline int at_xdmac_chan_is_paused(struct at_xdmac_chan *atchan)
 	return test_bit(AT_XDMAC_CHAN_IS_PAUSED, &atchan->status);
 }
 
-static inline int at_xdmac_csize(u32 maxburst)
-{
-	int csize;
-
-	csize = ffs(maxburst) - 1;
-	if (csize > 4)
-		csize = -EINVAL;
-
-	return csize;
-};
-
 static inline bool at_xdmac_chan_is_peripheral_xfer(u32 cfg)
 {
 	return cfg & AT_XDMAC_CC_TYPE_PER_TRAN;
-- 
cgit v1.2.3


From 397862855619271296e46d10f7dfa7bafe71eb81 Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Thu, 15 Apr 2021 16:37:10 -0700
Subject: dmaengine: idxd: fix dma device lifetime

The devm managed lifetime is incompatible with 'struct device' objects that
resides in idxd context. This is one of the series that clean up the idxd
driver 'struct device' lifetime. Remove embedding of dma_device and dma_chan
in idxd since it's not the only interface that idxd will use. The freeing of
the dma_device will be managed by the ->release() function.

Reported-by: Jason Gunthorpe <jgg@nvidia.com>
Fixes: bfe1d56091c1 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/161852983001.2203940.14817017492384561719.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/device.c |  2 --
 drivers/dma/idxd/dma.c    | 77 +++++++++++++++++++++++++++++++++++++++--------
 drivers/dma/idxd/idxd.h   | 18 +++++++++--
 3 files changed, 79 insertions(+), 18 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 78d2dc5e9bd8..d255bb016c4d 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -186,8 +186,6 @@ int idxd_wq_alloc_resources(struct idxd_wq *wq)
 		desc->id = i;
 		desc->wq = wq;
 		desc->cpu = -1;
-		dma_async_tx_descriptor_init(&desc->txd, &wq->dma_chan);
-		desc->txd.tx_submit = idxd_dma_tx_submit;
 	}
 
 	return 0;
diff --git a/drivers/dma/idxd/dma.c b/drivers/dma/idxd/dma.c
index a15e50126434..77439b645044 100644
--- a/drivers/dma/idxd/dma.c
+++ b/drivers/dma/idxd/dma.c
@@ -14,7 +14,10 @@
 
 static inline struct idxd_wq *to_idxd_wq(struct dma_chan *c)
 {
-	return container_of(c, struct idxd_wq, dma_chan);
+	struct idxd_dma_chan *idxd_chan;
+
+	idxd_chan = container_of(c, struct idxd_dma_chan, chan);
+	return idxd_chan->wq;
 }
 
 void idxd_dma_complete_txd(struct idxd_desc *desc,
@@ -135,7 +138,7 @@ static void idxd_dma_issue_pending(struct dma_chan *dma_chan)
 {
 }
 
-dma_cookie_t idxd_dma_tx_submit(struct dma_async_tx_descriptor *tx)
+static dma_cookie_t idxd_dma_tx_submit(struct dma_async_tx_descriptor *tx)
 {
 	struct dma_chan *c = tx->chan;
 	struct idxd_wq *wq = to_idxd_wq(c);
@@ -156,14 +159,25 @@ dma_cookie_t idxd_dma_tx_submit(struct dma_async_tx_descriptor *tx)
 
 static void idxd_dma_release(struct dma_device *device)
 {
+	struct idxd_dma_dev *idxd_dma = container_of(device, struct idxd_dma_dev, dma);
+
+	kfree(idxd_dma);
 }
 
 int idxd_register_dma_device(struct idxd_device *idxd)
 {
-	struct dma_device *dma = &idxd->dma_dev;
+	struct idxd_dma_dev *idxd_dma;
+	struct dma_device *dma;
+	struct device *dev = &idxd->pdev->dev;
+	int rc;
 
+	idxd_dma = kzalloc_node(sizeof(*idxd_dma), GFP_KERNEL, dev_to_node(dev));
+	if (!idxd_dma)
+		return -ENOMEM;
+
+	dma = &idxd_dma->dma;
 	INIT_LIST_HEAD(&dma->channels);
-	dma->dev = &idxd->pdev->dev;
+	dma->dev = dev;
 
 	dma_cap_set(DMA_PRIVATE, dma->cap_mask);
 	dma_cap_set(DMA_COMPLETION_NO_ORDER, dma->cap_mask);
@@ -179,35 +193,72 @@ int idxd_register_dma_device(struct idxd_device *idxd)
 	dma->device_alloc_chan_resources = idxd_dma_alloc_chan_resources;
 	dma->device_free_chan_resources = idxd_dma_free_chan_resources;
 
-	return dma_async_device_register(&idxd->dma_dev);
+	rc = dma_async_device_register(dma);
+	if (rc < 0) {
+		kfree(idxd_dma);
+		return rc;
+	}
+
+	idxd_dma->idxd = idxd;
+	/*
+	 * This pointer is protected by the refs taken by the dma_chan. It will remain valid
+	 * as long as there are outstanding channels.
+	 */
+	idxd->idxd_dma = idxd_dma;
+	return 0;
 }
 
 void idxd_unregister_dma_device(struct idxd_device *idxd)
 {
-	dma_async_device_unregister(&idxd->dma_dev);
+	dma_async_device_unregister(&idxd->idxd_dma->dma);
 }
 
 int idxd_register_dma_channel(struct idxd_wq *wq)
 {
 	struct idxd_device *idxd = wq->idxd;
-	struct dma_device *dma = &idxd->dma_dev;
-	struct dma_chan *chan = &wq->dma_chan;
-	int rc;
+	struct dma_device *dma = &idxd->idxd_dma->dma;
+	struct device *dev = &idxd->pdev->dev;
+	struct idxd_dma_chan *idxd_chan;
+	struct dma_chan *chan;
+	int rc, i;
+
+	idxd_chan = kzalloc_node(sizeof(*idxd_chan), GFP_KERNEL, dev_to_node(dev));
+	if (!idxd_chan)
+		return -ENOMEM;
 
-	memset(&wq->dma_chan, 0, sizeof(struct dma_chan));
+	chan = &idxd_chan->chan;
 	chan->device = dma;
 	list_add_tail(&chan->device_node, &dma->channels);
+
+	for (i = 0; i < wq->num_descs; i++) {
+		struct idxd_desc *desc = wq->descs[i];
+
+		dma_async_tx_descriptor_init(&desc->txd, chan);
+		desc->txd.tx_submit = idxd_dma_tx_submit;
+	}
+
 	rc = dma_async_device_channel_register(dma, chan);
-	if (rc < 0)
+	if (rc < 0) {
+		kfree(idxd_chan);
 		return rc;
+	}
+
+	wq->idxd_chan = idxd_chan;
+	idxd_chan->wq = wq;
+	get_device(&wq->conf_dev);
 
 	return 0;
 }
 
 void idxd_unregister_dma_channel(struct idxd_wq *wq)
 {
-	struct dma_chan *chan = &wq->dma_chan;
+	struct idxd_dma_chan *idxd_chan = wq->idxd_chan;
+	struct dma_chan *chan = &idxd_chan->chan;
+	struct idxd_dma_dev *idxd_dma = wq->idxd->idxd_dma;
 
-	dma_async_device_channel_unregister(&wq->idxd->dma_dev, chan);
+	dma_async_device_channel_unregister(&idxd_dma->dma, chan);
 	list_del(&chan->device_node);
+	kfree(wq->idxd_chan);
+	wq->idxd_chan = NULL;
+	put_device(&wq->conf_dev);
 }
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 76014c14f473..80e534680c9a 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -14,6 +14,9 @@
 
 extern struct kmem_cache *idxd_desc_pool;
 
+struct idxd_device;
+struct idxd_wq;
+
 #define IDXD_REG_TIMEOUT	50
 #define IDXD_DRAIN_TIMEOUT	5000
 
@@ -96,6 +99,11 @@ enum idxd_complete_type {
 	IDXD_COMPLETE_DEV_FAIL,
 };
 
+struct idxd_dma_chan {
+	struct dma_chan chan;
+	struct idxd_wq *wq;
+};
+
 struct idxd_wq {
 	void __iomem *portal;
 	struct device conf_dev;
@@ -125,7 +133,7 @@ struct idxd_wq {
 	int compls_size;
 	struct idxd_desc **descs;
 	struct sbitmap_queue sbq;
-	struct dma_chan dma_chan;
+	struct idxd_dma_chan *idxd_chan;
 	char name[WQ_NAME_SIZE + 1];
 	u64 max_xfer_bytes;
 	u32 max_batch_size;
@@ -162,6 +170,11 @@ enum idxd_device_flag {
 	IDXD_FLAG_PASID_ENABLED,
 };
 
+struct idxd_dma_dev {
+	struct idxd_device *idxd;
+	struct dma_device dma;
+};
+
 struct idxd_device {
 	enum idxd_type type;
 	struct device conf_dev;
@@ -210,7 +223,7 @@ struct idxd_device {
 	int num_wq_irqs;
 	struct idxd_irq_entry *irq_entries;
 
-	struct dma_device dma_dev;
+	struct idxd_dma_dev *idxd_dma;
 	struct workqueue_struct *wq;
 	struct work_struct work;
 };
@@ -363,7 +376,6 @@ void idxd_unregister_dma_channel(struct idxd_wq *wq);
 void idxd_parse_completion_status(u8 status, enum dmaengine_tx_result *res);
 void idxd_dma_complete_txd(struct idxd_desc *desc,
 			   enum idxd_complete_type comp_type);
-dma_cookie_t idxd_dma_tx_submit(struct dma_async_tx_descriptor *tx);
 
 /* cdev */
 int idxd_cdev_register(void);
-- 
cgit v1.2.3


From 5fc8e85ff12ce0530ac658686902a0ee64600f56 Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Thu, 15 Apr 2021 16:37:15 -0700
Subject: dmaengine: idxd: cleanup pci interrupt vector allocation management

The devm managed lifetime is incompatible with 'struct device' objects that
resides in idxd context. This is one of the series that clean up the idxd
driver 'struct device' lifetime. Remove devm managed pci interrupt vectors
and replace with unmanged allocators.

Reported-by: Jason Gunthorpe <jgg@nvidia.com>
Fixes: bfe1d56091c1 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/161852983563.2203940.8116028229124776669.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/device.c |  4 +--
 drivers/dma/idxd/idxd.h   |  2 +-
 drivers/dma/idxd/init.c   | 64 ++++++++++++++++++++---------------------------
 3 files changed, 30 insertions(+), 40 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index d255bb016c4d..3f696abd74ac 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -19,7 +19,7 @@ static void idxd_cmd_exec(struct idxd_device *idxd, int cmd_code, u32 operand,
 /* Interrupt control bits */
 void idxd_mask_msix_vector(struct idxd_device *idxd, int vec_id)
 {
-	struct irq_data *data = irq_get_irq_data(idxd->msix_entries[vec_id].vector);
+	struct irq_data *data = irq_get_irq_data(idxd->irq_entries[vec_id].vector);
 
 	pci_msi_mask_irq(data);
 }
@@ -36,7 +36,7 @@ void idxd_mask_msix_vectors(struct idxd_device *idxd)
 
 void idxd_unmask_msix_vector(struct idxd_device *idxd, int vec_id)
 {
-	struct irq_data *data = irq_get_irq_data(idxd->msix_entries[vec_id].vector);
+	struct irq_data *data = irq_get_irq_data(idxd->irq_entries[vec_id].vector);
 
 	pci_msi_unmask_irq(data);
 }
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 80e534680c9a..401b035e42b1 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -36,6 +36,7 @@ struct idxd_device_driver {
 struct idxd_irq_entry {
 	struct idxd_device *idxd;
 	int id;
+	int vector;
 	struct llist_head pending_llist;
 	struct list_head work_list;
 	/*
@@ -219,7 +220,6 @@ struct idxd_device {
 
 	union sw_err_reg sw_err;
 	wait_queue_head_t cmd_waitq;
-	struct msix_entry *msix_entries;
 	int num_wq_irqs;
 	struct idxd_irq_entry *irq_entries;
 
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index 6584b0ec07d5..5cf1bf095ae1 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -61,7 +61,6 @@ static int idxd_setup_interrupts(struct idxd_device *idxd)
 {
 	struct pci_dev *pdev = idxd->pdev;
 	struct device *dev = &pdev->dev;
-	struct msix_entry *msix;
 	struct idxd_irq_entry *irq_entry;
 	int i, msixcnt;
 	int rc = 0;
@@ -69,23 +68,13 @@ static int idxd_setup_interrupts(struct idxd_device *idxd)
 	msixcnt = pci_msix_vec_count(pdev);
 	if (msixcnt < 0) {
 		dev_err(dev, "Not MSI-X interrupt capable.\n");
-		goto err_no_irq;
+		return -ENOSPC;
 	}
 
-	idxd->msix_entries = devm_kzalloc(dev, sizeof(struct msix_entry) *
-			msixcnt, GFP_KERNEL);
-	if (!idxd->msix_entries) {
-		rc = -ENOMEM;
-		goto err_no_irq;
-	}
-
-	for (i = 0; i < msixcnt; i++)
-		idxd->msix_entries[i].entry = i;
-
-	rc = pci_enable_msix_exact(pdev, idxd->msix_entries, msixcnt);
-	if (rc) {
-		dev_err(dev, "Failed enabling %d MSIX entries.\n", msixcnt);
-		goto err_no_irq;
+	rc = pci_alloc_irq_vectors(pdev, msixcnt, msixcnt, PCI_IRQ_MSIX);
+	if (rc != msixcnt) {
+		dev_err(dev, "Failed enabling %d MSIX entries: %d\n", msixcnt, rc);
+		return -ENOSPC;
 	}
 	dev_dbg(dev, "Enabled %d msix vectors\n", msixcnt);
 
@@ -98,58 +87,57 @@ static int idxd_setup_interrupts(struct idxd_device *idxd)
 					 GFP_KERNEL);
 	if (!idxd->irq_entries) {
 		rc = -ENOMEM;
-		goto err_no_irq;
+		goto err_irq_entries;
 	}
 
 	for (i = 0; i < msixcnt; i++) {
 		idxd->irq_entries[i].id = i;
 		idxd->irq_entries[i].idxd = idxd;
+		idxd->irq_entries[i].vector = pci_irq_vector(pdev, i);
 		spin_lock_init(&idxd->irq_entries[i].list_lock);
 	}
 
-	msix = &idxd->msix_entries[0];
 	irq_entry = &idxd->irq_entries[0];
-	rc = devm_request_threaded_irq(dev, msix->vector, idxd_irq_handler,
-				       idxd_misc_thread, 0, "idxd-misc",
-				       irq_entry);
+	rc = request_threaded_irq(irq_entry->vector, idxd_irq_handler, idxd_misc_thread,
+				  0, "idxd-misc", irq_entry);
 	if (rc < 0) {
 		dev_err(dev, "Failed to allocate misc interrupt.\n");
-		goto err_no_irq;
+		goto err_misc_irq;
 	}
 
-	dev_dbg(dev, "Allocated idxd-misc handler on msix vector %d\n",
-		msix->vector);
+	dev_dbg(dev, "Allocated idxd-misc handler on msix vector %d\n", irq_entry->vector);
 
 	/* first MSI-X entry is not for wq interrupts */
 	idxd->num_wq_irqs = msixcnt - 1;
 
 	for (i = 1; i < msixcnt; i++) {
-		msix = &idxd->msix_entries[i];
 		irq_entry = &idxd->irq_entries[i];
 
 		init_llist_head(&idxd->irq_entries[i].pending_llist);
 		INIT_LIST_HEAD(&idxd->irq_entries[i].work_list);
-		rc = devm_request_threaded_irq(dev, msix->vector,
-					       idxd_irq_handler,
-					       idxd_wq_thread, 0,
-					       "idxd-portal", irq_entry);
+		rc = request_threaded_irq(irq_entry->vector, idxd_irq_handler,
+					  idxd_wq_thread, 0, "idxd-portal", irq_entry);
 		if (rc < 0) {
-			dev_err(dev, "Failed to allocate irq %d.\n",
-				msix->vector);
-			goto err_no_irq;
+			dev_err(dev, "Failed to allocate irq %d.\n", irq_entry->vector);
+			goto err_wq_irqs;
 		}
-		dev_dbg(dev, "Allocated idxd-msix %d for vector %d\n",
-			i, msix->vector);
+		dev_dbg(dev, "Allocated idxd-msix %d for vector %d\n", i, irq_entry->vector);
 	}
 
 	idxd_unmask_error_interrupts(idxd);
 	idxd_msix_perm_setup(idxd);
 	return 0;
 
- err_no_irq:
+ err_wq_irqs:
+	while (--i >= 0) {
+		irq_entry = &idxd->irq_entries[i];
+		free_irq(irq_entry->vector, irq_entry);
+	}
+ err_misc_irq:
 	/* Disable error interrupt generation */
 	idxd_mask_error_interrupts(idxd);
-	pci_disable_msix(pdev);
+ err_irq_entries:
+	pci_free_irq_vectors(pdev);
 	dev_err(dev, "No usable interrupts\n");
 	return rc;
 }
@@ -495,7 +483,8 @@ static void idxd_shutdown(struct pci_dev *pdev)
 
 	for (i = 0; i < msixcnt; i++) {
 		irq_entry = &idxd->irq_entries[i];
-		synchronize_irq(idxd->msix_entries[i].vector);
+		synchronize_irq(irq_entry->vector);
+		free_irq(irq_entry->vector, irq_entry);
 		if (i == 0)
 			continue;
 		idxd_flush_pending_llist(irq_entry);
@@ -503,6 +492,7 @@ static void idxd_shutdown(struct pci_dev *pdev)
 	}
 
 	idxd_msix_perm_clear(idxd);
+	pci_free_irq_vectors(pdev);
 	destroy_workqueue(idxd->wq);
 }
 
-- 
cgit v1.2.3


From a39c7cd0438ee2f0b859ee1eb86cdc52217d2223 Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Thu, 15 Apr 2021 16:37:21 -0700
Subject: dmaengine: idxd: removal of pcim managed mmio mapping

The devm managed lifetime is incompatible with 'struct device' objects that
resides in idxd context. This is one of the series that clean up the idxd
driver 'struct device' lifetime. Remove pcim_* management of the PCI device
and the ioremap of MMIO BAR and replace with unmanaged versions. This is
for consistency of removing all the pcim/devm based calls.

Reported-by: Jason Gunthorpe <jgg@nvidia.com>
Fixes: bfe1d56091c1 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/161852984150.2203940.8043988289748519056.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/init.c | 33 +++++++++++++++++++++++----------
 1 file changed, 23 insertions(+), 10 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index 5cf1bf095ae1..11a2e14b5b80 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -384,32 +384,36 @@ static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	struct idxd_device *idxd;
 	int rc;
 
-	rc = pcim_enable_device(pdev);
+	rc = pci_enable_device(pdev);
 	if (rc)
 		return rc;
 
 	dev_dbg(dev, "Alloc IDXD context\n");
 	idxd = idxd_alloc(pdev);
-	if (!idxd)
-		return -ENOMEM;
+	if (!idxd) {
+		rc = -ENOMEM;
+		goto err_idxd_alloc;
+	}
 
 	dev_dbg(dev, "Mapping BARs\n");
-	idxd->reg_base = pcim_iomap(pdev, IDXD_MMIO_BAR, 0);
-	if (!idxd->reg_base)
-		return -ENOMEM;
+	idxd->reg_base = pci_iomap(pdev, IDXD_MMIO_BAR, 0);
+	if (!idxd->reg_base) {
+		rc = -ENOMEM;
+		goto err_iomap;
+	}
 
 	dev_dbg(dev, "Set DMA masks\n");
 	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
 	if (rc)
 		rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 	if (rc)
-		return rc;
+		goto err;
 
 	rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 	if (rc)
 		rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
 	if (rc)
-		return rc;
+		goto err;
 
 	idxd_set_type(idxd);
 
@@ -423,13 +427,13 @@ static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	rc = idxd_probe(idxd);
 	if (rc) {
 		dev_err(dev, "Intel(R) IDXD DMA Engine init failed\n");
-		return -ENODEV;
+		goto err;
 	}
 
 	rc = idxd_setup_sysfs(idxd);
 	if (rc) {
 		dev_err(dev, "IDXD sysfs setup failed\n");
-		return -ENODEV;
+		goto err;
 	}
 
 	idxd->state = IDXD_DEV_CONF_READY;
@@ -438,6 +442,13 @@ static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		 idxd->hw.version);
 
 	return 0;
+
+ err:
+	pci_iounmap(pdev, idxd->reg_base);
+ err_iomap:
+ err_idxd_alloc:
+	pci_disable_device(pdev);
+	return rc;
 }
 
 static void idxd_flush_pending_llist(struct idxd_irq_entry *ie)
@@ -493,6 +504,8 @@ static void idxd_shutdown(struct pci_dev *pdev)
 
 	idxd_msix_perm_clear(idxd);
 	pci_free_irq_vectors(pdev);
+	pci_iounmap(pdev, idxd->reg_base);
+	pci_disable_device(pdev);
 	destroy_workqueue(idxd->wq);
 }
 
-- 
cgit v1.2.3


From f7f7739847bd68b3c3103fd1b50d943038bd14c7 Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Thu, 15 Apr 2021 16:37:27 -0700
Subject: dmaengine: idxd: use ida for device instance enumeration

The idr is only used for an device id, never to lookup context from that
id. Switch to plain ida.

Fixes: bfe1d56091c1 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Reported-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852984730.2203940.15032482460902003819.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/init.c | 17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index 11a2e14b5b80..a4f0489515b4 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -34,8 +34,7 @@ MODULE_PARM_DESC(sva, "Toggle SVA support on/off");
 
 bool support_enqcmd;
 
-static struct idr idxd_idrs[IDXD_TYPE_MAX];
-static DEFINE_MUTEX(idxd_idr_lock);
+static struct ida idxd_idas[IDXD_TYPE_MAX];
 
 static struct pci_device_id idxd_pci_tbl[] = {
 	/* DSA ver 1.0 platforms */
@@ -348,12 +347,10 @@ static int idxd_probe(struct idxd_device *idxd)
 
 	dev_dbg(dev, "IDXD interrupt setup complete.\n");
 
-	mutex_lock(&idxd_idr_lock);
-	idxd->id = idr_alloc(&idxd_idrs[idxd->type], idxd, 0, 0, GFP_KERNEL);
-	mutex_unlock(&idxd_idr_lock);
+	idxd->id = ida_alloc(&idxd_idas[idxd->type], GFP_KERNEL);
 	if (idxd->id < 0) {
 		rc = -ENOMEM;
-		goto err_idr_fail;
+		goto err_ida_fail;
 	}
 
 	idxd->major = idxd_cdev_get_major(idxd);
@@ -361,7 +358,7 @@ static int idxd_probe(struct idxd_device *idxd)
 	dev_dbg(dev, "IDXD device %d probed successfully\n", idxd->id);
 	return 0;
 
- err_idr_fail:
+ err_ida_fail:
 	idxd_mask_error_interrupts(idxd);
 	idxd_mask_msix_vectors(idxd);
  err_setup:
@@ -518,9 +515,7 @@ static void idxd_remove(struct pci_dev *pdev)
 	idxd_shutdown(pdev);
 	if (device_pasid_enabled(idxd))
 		idxd_disable_system_pasid(idxd);
-	mutex_lock(&idxd_idr_lock);
-	idr_remove(&idxd_idrs[idxd->type], idxd->id);
-	mutex_unlock(&idxd_idr_lock);
+	ida_free(&idxd_idas[idxd->type], idxd->id);
 }
 
 static struct pci_driver idxd_pci_driver = {
@@ -550,7 +545,7 @@ static int __init idxd_init_module(void)
 		support_enqcmd = true;
 
 	for (i = 0; i < IDXD_TYPE_MAX; i++)
-		idr_init(&idxd_idrs[i]);
+		ida_init(&idxd_idas[i]);
 
 	err = idxd_register_bus_type();
 	if (err < 0)
-- 
cgit v1.2.3


From 47c16ac27d4cb664cee53ee0b9b7e2f907923fb3 Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Thu, 15 Apr 2021 16:37:33 -0700
Subject: dmaengine: idxd: fix idxd conf_dev 'struct device' lifetime

The devm managed lifetime is incompatible with 'struct device' objects that
resides in idxd context. This is one of the series that clean up the idxd
driver 'struct device' lifetime. Fix idxd->conf_dev 'struct device'
lifetime. Address issues flagged by CONFIG_DEBUG_KOBJECT_RELEASE.
Add release functions in order to free the allocated memory at the
appropriate time.

Reported-by: Jason Gunthorpe <jgg@nvidia.com>
Fixes: bfe1d56091c1 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852985319.2203940.4650791514462735368.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/idxd.h  | 36 +++++++++++--------
 drivers/dma/idxd/init.c  | 56 ++++++++++++++++++++---------
 drivers/dma/idxd/sysfs.c | 92 +++++++++++++++++-------------------------------
 3 files changed, 94 insertions(+), 90 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 401b035e42b1..bb3a580732af 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -8,6 +8,7 @@
 #include <linux/percpu-rwsem.h>
 #include <linux/wait.h>
 #include <linux/cdev.h>
+#include <linux/idr.h>
 #include "registers.h"
 
 #define IDXD_DRIVER_VERSION	"1.00"
@@ -255,6 +256,23 @@ extern struct bus_type dsa_bus_type;
 extern struct bus_type iax_bus_type;
 
 extern bool support_enqcmd;
+extern struct device_type dsa_device_type;
+extern struct device_type iax_device_type;
+
+static inline bool is_dsa_dev(struct device *dev)
+{
+	return dev->type == &dsa_device_type;
+}
+
+static inline bool is_iax_dev(struct device *dev)
+{
+	return dev->type == &iax_device_type;
+}
+
+static inline bool is_idxd_dev(struct device *dev)
+{
+	return is_dsa_dev(dev) || is_iax_dev(dev);
+}
 
 static inline bool wq_dedicated(struct idxd_wq *wq)
 {
@@ -292,18 +310,6 @@ static inline int idxd_get_wq_portal_full_offset(int wq_id,
 	return ((wq_id * 4) << PAGE_SHIFT) + idxd_get_wq_portal_offset(prot);
 }
 
-static inline void idxd_set_type(struct idxd_device *idxd)
-{
-	struct pci_dev *pdev = idxd->pdev;
-
-	if (pdev->device == PCI_DEVICE_ID_INTEL_DSA_SPR0)
-		idxd->type = IDXD_TYPE_DSA;
-	else if (pdev->device == PCI_DEVICE_ID_INTEL_IAX_SPR0)
-		idxd->type = IDXD_TYPE_IAX;
-	else
-		idxd->type = IDXD_TYPE_UNKNOWN;
-}
-
 static inline void idxd_wq_get(struct idxd_wq *wq)
 {
 	wq->client_count++;
@@ -319,14 +325,16 @@ static inline int idxd_wq_refcount(struct idxd_wq *wq)
 	return wq->client_count;
 };
 
+struct ida *idxd_ida(struct idxd_device *idxd);
 const char *idxd_get_dev_name(struct idxd_device *idxd);
 int idxd_register_bus_type(void);
 void idxd_unregister_bus_type(void);
-int idxd_setup_sysfs(struct idxd_device *idxd);
-void idxd_cleanup_sysfs(struct idxd_device *idxd);
+int idxd_register_devices(struct idxd_device *idxd);
+void idxd_unregister_devices(struct idxd_device *idxd);
 int idxd_register_driver(void);
 void idxd_unregister_driver(void);
 struct bus_type *idxd_get_bus_type(struct idxd_device *idxd);
+struct device_type *idxd_get_device_type(struct idxd_device *idxd);
 
 /* device interrupt control */
 void idxd_msix_perm_setup(struct idxd_device *idxd);
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index a4f0489515b4..17d3b36610a9 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -51,6 +51,11 @@ static char *idxd_name[] = {
 	"iax"
 };
 
+struct ida *idxd_ida(struct idxd_device *idxd)
+{
+	return &idxd_idas[idxd->type];
+}
+
 const char *idxd_get_dev_name(struct idxd_device *idxd)
 {
 	return idxd_name[idxd->type];
@@ -81,9 +86,8 @@ static int idxd_setup_interrupts(struct idxd_device *idxd)
 	 * We implement 1 completion list per MSI-X entry except for
 	 * entry 0, which is for errors and others.
 	 */
-	idxd->irq_entries = devm_kcalloc(dev, msixcnt,
-					 sizeof(struct idxd_irq_entry),
-					 GFP_KERNEL);
+	idxd->irq_entries = kcalloc_node(msixcnt, sizeof(struct idxd_irq_entry),
+					 GFP_KERNEL, dev_to_node(dev));
 	if (!idxd->irq_entries) {
 		rc = -ENOMEM;
 		goto err_irq_entries;
@@ -262,16 +266,44 @@ static void idxd_read_caps(struct idxd_device *idxd)
 	}
 }
 
+static inline void idxd_set_type(struct idxd_device *idxd)
+{
+	struct pci_dev *pdev = idxd->pdev;
+
+	if (pdev->device == PCI_DEVICE_ID_INTEL_DSA_SPR0)
+		idxd->type = IDXD_TYPE_DSA;
+	else if (pdev->device == PCI_DEVICE_ID_INTEL_IAX_SPR0)
+		idxd->type = IDXD_TYPE_IAX;
+	else
+		idxd->type = IDXD_TYPE_UNKNOWN;
+}
+
 static struct idxd_device *idxd_alloc(struct pci_dev *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct idxd_device *idxd;
+	int rc;
 
-	idxd = devm_kzalloc(dev, sizeof(struct idxd_device), GFP_KERNEL);
+	idxd = kzalloc_node(sizeof(*idxd), GFP_KERNEL, dev_to_node(dev));
 	if (!idxd)
 		return NULL;
 
 	idxd->pdev = pdev;
+	idxd_set_type(idxd);
+	idxd->id = ida_alloc(idxd_ida(idxd), GFP_KERNEL);
+	if (idxd->id < 0)
+		return NULL;
+
+	device_initialize(&idxd->conf_dev);
+	idxd->conf_dev.parent = dev;
+	idxd->conf_dev.bus = idxd_get_bus_type(idxd);
+	idxd->conf_dev.type = idxd_get_device_type(idxd);
+	rc = dev_set_name(&idxd->conf_dev, "%s%d", idxd_get_dev_name(idxd), idxd->id);
+	if (rc < 0) {
+		put_device(&idxd->conf_dev);
+		return NULL;
+	}
+
 	spin_lock_init(&idxd->dev_lock);
 
 	return idxd;
@@ -347,20 +379,11 @@ static int idxd_probe(struct idxd_device *idxd)
 
 	dev_dbg(dev, "IDXD interrupt setup complete.\n");
 
-	idxd->id = ida_alloc(&idxd_idas[idxd->type], GFP_KERNEL);
-	if (idxd->id < 0) {
-		rc = -ENOMEM;
-		goto err_ida_fail;
-	}
-
 	idxd->major = idxd_cdev_get_major(idxd);
 
 	dev_dbg(dev, "IDXD device %d probed successfully\n", idxd->id);
 	return 0;
 
- err_ida_fail:
-	idxd_mask_error_interrupts(idxd);
-	idxd_mask_msix_vectors(idxd);
  err_setup:
 	if (device_pasid_enabled(idxd))
 		idxd_disable_system_pasid(idxd);
@@ -412,7 +435,6 @@ static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	if (rc)
 		goto err;
 
-	idxd_set_type(idxd);
 
 	idxd_type_init(idxd);
 
@@ -427,7 +449,7 @@ static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		goto err;
 	}
 
-	rc = idxd_setup_sysfs(idxd);
+	rc = idxd_register_devices(idxd);
 	if (rc) {
 		dev_err(dev, "IDXD sysfs setup failed\n");
 		goto err;
@@ -443,6 +465,7 @@ static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
  err:
 	pci_iounmap(pdev, idxd->reg_base);
  err_iomap:
+	put_device(&idxd->conf_dev);
  err_idxd_alloc:
 	pci_disable_device(pdev);
 	return rc;
@@ -511,11 +534,10 @@ static void idxd_remove(struct pci_dev *pdev)
 	struct idxd_device *idxd = pci_get_drvdata(pdev);
 
 	dev_dbg(&pdev->dev, "%s called\n", __func__);
-	idxd_cleanup_sysfs(idxd);
 	idxd_shutdown(pdev);
 	if (device_pasid_enabled(idxd))
 		idxd_disable_system_pasid(idxd);
-	ida_free(&idxd_idas[idxd->type], idxd->id);
+	idxd_unregister_devices(idxd);
 }
 
 static struct pci_driver idxd_pci_driver = {
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 18bf4d148989..36193e555e36 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -16,51 +16,26 @@ static char *idxd_wq_type_names[] = {
 	[IDXD_WQT_USER]		= "user",
 };
 
-static void idxd_conf_device_release(struct device *dev)
+static void idxd_conf_sub_device_release(struct device *dev)
 {
 	dev_dbg(dev, "%s for %s\n", __func__, dev_name(dev));
 }
 
 static struct device_type idxd_group_device_type = {
 	.name = "group",
-	.release = idxd_conf_device_release,
+	.release = idxd_conf_sub_device_release,
 };
 
 static struct device_type idxd_wq_device_type = {
 	.name = "wq",
-	.release = idxd_conf_device_release,
+	.release = idxd_conf_sub_device_release,
 };
 
 static struct device_type idxd_engine_device_type = {
 	.name = "engine",
-	.release = idxd_conf_device_release,
+	.release = idxd_conf_sub_device_release,
 };
 
-static struct device_type dsa_device_type = {
-	.name = "dsa",
-	.release = idxd_conf_device_release,
-};
-
-static struct device_type iax_device_type = {
-	.name = "iax",
-	.release = idxd_conf_device_release,
-};
-
-static inline bool is_dsa_dev(struct device *dev)
-{
-	return dev ? dev->type == &dsa_device_type : false;
-}
-
-static inline bool is_iax_dev(struct device *dev)
-{
-	return dev ? dev->type == &iax_device_type : false;
-}
-
-static inline bool is_idxd_dev(struct device *dev)
-{
-	return is_dsa_dev(dev) || is_iax_dev(dev);
-}
-
 static inline bool is_idxd_wq_dev(struct device *dev)
 {
 	return dev ? dev->type == &idxd_wq_device_type : false;
@@ -405,7 +380,7 @@ struct bus_type *idxd_get_bus_type(struct idxd_device *idxd)
 	return idxd_bus_types[idxd->type];
 }
 
-static struct device_type *idxd_get_device_type(struct idxd_device *idxd)
+struct device_type *idxd_get_device_type(struct idxd_device *idxd)
 {
 	if (idxd->type == IDXD_TYPE_DSA)
 		return &dsa_device_type;
@@ -1644,6 +1619,30 @@ static const struct attribute_group *idxd_attribute_groups[] = {
 	NULL,
 };
 
+static void idxd_conf_device_release(struct device *dev)
+{
+	struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev);
+
+	kfree(idxd->groups);
+	kfree(idxd->wqs);
+	kfree(idxd->engines);
+	kfree(idxd->irq_entries);
+	ida_free(idxd_ida(idxd), idxd->id);
+	kfree(idxd);
+}
+
+struct device_type dsa_device_type = {
+	.name = "dsa",
+	.release = idxd_conf_device_release,
+	.groups = idxd_attribute_groups,
+};
+
+struct device_type iax_device_type = {
+	.name = "iax",
+	.release = idxd_conf_device_release,
+	.groups = idxd_attribute_groups,
+};
+
 static int idxd_setup_engine_sysfs(struct idxd_device *idxd)
 {
 	struct device *dev = &idxd->pdev->dev;
@@ -1745,39 +1744,14 @@ cleanup:
 	return rc;
 }
 
-static int idxd_setup_device_sysfs(struct idxd_device *idxd)
+int idxd_register_devices(struct idxd_device *idxd)
 {
 	struct device *dev = &idxd->pdev->dev;
 	int rc;
-	char devname[IDXD_NAME_SIZE];
 
-	sprintf(devname, "%s%d", idxd_get_dev_name(idxd), idxd->id);
-	idxd->conf_dev.parent = dev;
-	dev_set_name(&idxd->conf_dev, "%s", devname);
-	idxd->conf_dev.bus = idxd_get_bus_type(idxd);
-	idxd->conf_dev.groups = idxd_attribute_groups;
-	idxd->conf_dev.type = idxd_get_device_type(idxd);
-
-	dev_dbg(dev, "IDXD device register: %s\n", dev_name(&idxd->conf_dev));
-	rc = device_register(&idxd->conf_dev);
-	if (rc < 0) {
-		put_device(&idxd->conf_dev);
-		return rc;
-	}
-
-	return 0;
-}
-
-int idxd_setup_sysfs(struct idxd_device *idxd)
-{
-	struct device *dev = &idxd->pdev->dev;
-	int rc;
-
-	rc = idxd_setup_device_sysfs(idxd);
-	if (rc < 0) {
-		dev_dbg(dev, "Device sysfs registering failed: %d\n", rc);
+	rc = device_add(&idxd->conf_dev);
+	if (rc < 0)
 		return rc;
-	}
 
 	rc = idxd_setup_wq_sysfs(idxd);
 	if (rc < 0) {
@@ -1803,7 +1777,7 @@ int idxd_setup_sysfs(struct idxd_device *idxd)
 	return 0;
 }
 
-void idxd_cleanup_sysfs(struct idxd_device *idxd)
+void idxd_unregister_devices(struct idxd_device *idxd)
 {
 	int i;
 
-- 
cgit v1.2.3


From 7c5dd23e57c14cf7177b8a5e0fd08916e0c60005 Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Thu, 15 Apr 2021 16:37:39 -0700
Subject: dmaengine: idxd: fix wq conf_dev 'struct device' lifetime

Remove devm_* allocation and fix wq->conf_dev 'struct device' lifetime.
Address issues flagged by CONFIG_DEBUG_KOBJECT_RELEASE. Add release
functions in order to free the allocated memory for the wq context at
device destruction time.

Reported-by: Jason Gunthorpe <jgg@nvidia.com>
Fixes: bfe1d56091c1 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852985907.2203940.6840120734115043753.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/device.c |   6 +--
 drivers/dma/idxd/idxd.h   |  20 ++++++++-
 drivers/dma/idxd/init.c   | 105 +++++++++++++++++++++++++++++++++-------------
 drivers/dma/idxd/irq.c    |   6 +--
 drivers/dma/idxd/sysfs.c  | 100 +++++++++++++++++++------------------------
 5 files changed, 146 insertions(+), 91 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 3f696abd74ac..c4183294a704 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -520,7 +520,7 @@ void idxd_device_wqs_clear_state(struct idxd_device *idxd)
 	lockdep_assert_held(&idxd->dev_lock);
 
 	for (i = 0; i < idxd->max_wqs; i++) {
-		struct idxd_wq *wq = &idxd->wqs[i];
+		struct idxd_wq *wq = idxd->wqs[i];
 
 		if (wq->state == IDXD_WQ_ENABLED) {
 			idxd_wq_disable_cleanup(wq);
@@ -738,7 +738,7 @@ static int idxd_wqs_config_write(struct idxd_device *idxd)
 	int i, rc;
 
 	for (i = 0; i < idxd->max_wqs; i++) {
-		struct idxd_wq *wq = &idxd->wqs[i];
+		struct idxd_wq *wq = idxd->wqs[i];
 
 		rc = idxd_wq_config_write(wq);
 		if (rc < 0)
@@ -816,7 +816,7 @@ static int idxd_wqs_setup(struct idxd_device *idxd)
 	}
 
 	for (i = 0; i < idxd->max_wqs; i++) {
-		wq = &idxd->wqs[i];
+		wq = idxd->wqs[i];
 		group = wq->group;
 
 		if (!wq->group)
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index bb3a580732af..6cade6a05314 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -194,7 +194,7 @@ struct idxd_device {
 	spinlock_t dev_lock;	/* spinlock for device */
 	struct completion *cmd_done;
 	struct idxd_group *groups;
-	struct idxd_wq *wqs;
+	struct idxd_wq **wqs;
 	struct idxd_engine *engines;
 
 	struct iommu_sva *sva;
@@ -258,6 +258,7 @@ extern struct bus_type iax_bus_type;
 extern bool support_enqcmd;
 extern struct device_type dsa_device_type;
 extern struct device_type iax_device_type;
+extern struct device_type idxd_wq_device_type;
 
 static inline bool is_dsa_dev(struct device *dev)
 {
@@ -274,6 +275,23 @@ static inline bool is_idxd_dev(struct device *dev)
 	return is_dsa_dev(dev) || is_iax_dev(dev);
 }
 
+static inline bool is_idxd_wq_dev(struct device *dev)
+{
+	return dev->type == &idxd_wq_device_type;
+}
+
+static inline bool is_idxd_wq_dmaengine(struct idxd_wq *wq)
+{
+	if (wq->type == IDXD_WQT_KERNEL && strcmp(wq->name, "dmaengine") == 0)
+		return true;
+	return false;
+}
+
+static inline bool is_idxd_wq_cdev(struct idxd_wq *wq)
+{
+	return wq->type == IDXD_WQT_USER;
+}
+
 static inline bool wq_dedicated(struct idxd_wq *wq)
 {
 	return test_bit(WQ_FLAG_DEDICATED, &wq->flags);
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index 17d3b36610a9..a2dca27aebc3 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -145,16 +145,74 @@ static int idxd_setup_interrupts(struct idxd_device *idxd)
 	return rc;
 }
 
+static int idxd_setup_wqs(struct idxd_device *idxd)
+{
+	struct device *dev = &idxd->pdev->dev;
+	struct idxd_wq *wq;
+	int i, rc;
+
+	idxd->wqs = kcalloc_node(idxd->max_wqs, sizeof(struct idxd_wq *),
+				 GFP_KERNEL, dev_to_node(dev));
+	if (!idxd->wqs)
+		return -ENOMEM;
+
+	for (i = 0; i < idxd->max_wqs; i++) {
+		wq = kzalloc_node(sizeof(*wq), GFP_KERNEL, dev_to_node(dev));
+		if (!wq) {
+			rc = -ENOMEM;
+			goto err;
+		}
+
+		wq->id = i;
+		wq->idxd = idxd;
+		device_initialize(&wq->conf_dev);
+		wq->conf_dev.parent = &idxd->conf_dev;
+		wq->conf_dev.bus = idxd_get_bus_type(idxd);
+		wq->conf_dev.type = &idxd_wq_device_type;
+		rc = dev_set_name(&wq->conf_dev, "wq%d.%d", idxd->id, wq->id);
+		if (rc < 0) {
+			put_device(&wq->conf_dev);
+			goto err;
+		}
+
+		mutex_init(&wq->wq_lock);
+		wq->idxd_cdev.minor = -1;
+		wq->max_xfer_bytes = idxd->max_xfer_bytes;
+		wq->max_batch_size = idxd->max_batch_size;
+		wq->wqcfg = kzalloc_node(idxd->wqcfg_size, GFP_KERNEL, dev_to_node(dev));
+		if (!wq->wqcfg) {
+			put_device(&wq->conf_dev);
+			rc = -ENOMEM;
+			goto err;
+		}
+		idxd->wqs[i] = wq;
+	}
+
+	return 0;
+
+ err:
+	while (--i >= 0)
+		put_device(&idxd->wqs[i]->conf_dev);
+	return rc;
+}
+
 static int idxd_setup_internals(struct idxd_device *idxd)
 {
 	struct device *dev = &idxd->pdev->dev;
-	int i;
+	int i, rc;
 
 	init_waitqueue_head(&idxd->cmd_waitq);
+
+	rc = idxd_setup_wqs(idxd);
+	if (rc < 0)
+		return rc;
+
 	idxd->groups = devm_kcalloc(dev, idxd->max_groups,
 				    sizeof(struct idxd_group), GFP_KERNEL);
-	if (!idxd->groups)
-		return -ENOMEM;
+	if (!idxd->groups) {
+		rc = -ENOMEM;
+		goto err;
+	}
 
 	for (i = 0; i < idxd->max_groups; i++) {
 		idxd->groups[i].idxd = idxd;
@@ -163,40 +221,31 @@ static int idxd_setup_internals(struct idxd_device *idxd)
 		idxd->groups[i].tc_b = -1;
 	}
 
-	idxd->wqs = devm_kcalloc(dev, idxd->max_wqs, sizeof(struct idxd_wq),
-				 GFP_KERNEL);
-	if (!idxd->wqs)
-		return -ENOMEM;
-
 	idxd->engines = devm_kcalloc(dev, idxd->max_engines,
 				     sizeof(struct idxd_engine), GFP_KERNEL);
-	if (!idxd->engines)
-		return -ENOMEM;
-
-	for (i = 0; i < idxd->max_wqs; i++) {
-		struct idxd_wq *wq = &idxd->wqs[i];
-
-		wq->id = i;
-		wq->idxd = idxd;
-		mutex_init(&wq->wq_lock);
-		wq->idxd_cdev.minor = -1;
-		wq->max_xfer_bytes = idxd->max_xfer_bytes;
-		wq->max_batch_size = idxd->max_batch_size;
-		wq->wqcfg = devm_kzalloc(dev, idxd->wqcfg_size, GFP_KERNEL);
-		if (!wq->wqcfg)
-			return -ENOMEM;
+	if (!idxd->engines) {
+		rc = -ENOMEM;
+		goto err;
 	}
 
+
 	for (i = 0; i < idxd->max_engines; i++) {
 		idxd->engines[i].idxd = idxd;
 		idxd->engines[i].id = i;
 	}
 
 	idxd->wq = create_workqueue(dev_name(dev));
-	if (!idxd->wq)
-		return -ENOMEM;
+	if (!idxd->wq) {
+		rc = -ENOMEM;
+		goto err;
+	}
 
 	return 0;
+
+ err:
+	for (i = 0; i < idxd->max_wqs; i++)
+		put_device(&idxd->wqs[i]->conf_dev);
+	return rc;
 }
 
 static void idxd_read_table_offsets(struct idxd_device *idxd)
@@ -371,11 +420,11 @@ static int idxd_probe(struct idxd_device *idxd)
 
 	rc = idxd_setup_internals(idxd);
 	if (rc)
-		goto err_setup;
+		goto err;
 
 	rc = idxd_setup_interrupts(idxd);
 	if (rc)
-		goto err_setup;
+		goto err;
 
 	dev_dbg(dev, "IDXD interrupt setup complete.\n");
 
@@ -384,7 +433,7 @@ static int idxd_probe(struct idxd_device *idxd)
 	dev_dbg(dev, "IDXD device %d probed successfully\n", idxd->id);
 	return 0;
 
- err_setup:
+ err:
 	if (device_pasid_enabled(idxd))
 		idxd_disable_system_pasid(idxd);
 	return rc;
diff --git a/drivers/dma/idxd/irq.c b/drivers/dma/idxd/irq.c
index f1463fc58112..7b0181532f77 100644
--- a/drivers/dma/idxd/irq.c
+++ b/drivers/dma/idxd/irq.c
@@ -45,7 +45,7 @@ static void idxd_device_reinit(struct work_struct *work)
 		goto out;
 
 	for (i = 0; i < idxd->max_wqs; i++) {
-		struct idxd_wq *wq = &idxd->wqs[i];
+		struct idxd_wq *wq = idxd->wqs[i];
 
 		if (wq->state == IDXD_WQ_ENABLED) {
 			rc = idxd_wq_enable(wq);
@@ -130,7 +130,7 @@ static int process_misc_interrupts(struct idxd_device *idxd, u32 cause)
 
 		if (idxd->sw_err.valid && idxd->sw_err.wq_idx_valid) {
 			int id = idxd->sw_err.wq_idx;
-			struct idxd_wq *wq = &idxd->wqs[id];
+			struct idxd_wq *wq = idxd->wqs[id];
 
 			if (wq->type == IDXD_WQT_USER)
 				wake_up_interruptible(&wq->idxd_cdev.err_queue);
@@ -138,7 +138,7 @@ static int process_misc_interrupts(struct idxd_device *idxd, u32 cause)
 			int i;
 
 			for (i = 0; i < idxd->max_wqs; i++) {
-				struct idxd_wq *wq = &idxd->wqs[i];
+				struct idxd_wq *wq = idxd->wqs[i];
 
 				if (wq->type == IDXD_WQT_USER)
 					wake_up_interruptible(&wq->idxd_cdev.err_queue);
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 36193e555e36..409b3ce52f07 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -26,34 +26,11 @@ static struct device_type idxd_group_device_type = {
 	.release = idxd_conf_sub_device_release,
 };
 
-static struct device_type idxd_wq_device_type = {
-	.name = "wq",
-	.release = idxd_conf_sub_device_release,
-};
-
 static struct device_type idxd_engine_device_type = {
 	.name = "engine",
 	.release = idxd_conf_sub_device_release,
 };
 
-static inline bool is_idxd_wq_dev(struct device *dev)
-{
-	return dev ? dev->type == &idxd_wq_device_type : false;
-}
-
-static inline bool is_idxd_wq_dmaengine(struct idxd_wq *wq)
-{
-	if (wq->type == IDXD_WQT_KERNEL &&
-	    strcmp(wq->name, "dmaengine") == 0)
-		return true;
-	return false;
-}
-
-static inline bool is_idxd_wq_cdev(struct idxd_wq *wq)
-{
-	return wq->type == IDXD_WQT_USER;
-}
-
 static int idxd_config_bus_match(struct device *dev,
 				 struct device_driver *drv)
 {
@@ -297,7 +274,7 @@ static int idxd_config_bus_remove(struct device *dev)
 		dev_dbg(dev, "%s removing dev %s\n", __func__,
 			dev_name(&idxd->conf_dev));
 		for (i = 0; i < idxd->max_wqs; i++) {
-			struct idxd_wq *wq = &idxd->wqs[i];
+			struct idxd_wq *wq = idxd->wqs[i];
 
 			if (wq->state == IDXD_WQ_DISABLED)
 				continue;
@@ -309,7 +286,7 @@ static int idxd_config_bus_remove(struct device *dev)
 		idxd_unregister_dma_device(idxd);
 		rc = idxd_device_disable(idxd);
 		for (i = 0; i < idxd->max_wqs; i++) {
-			struct idxd_wq *wq = &idxd->wqs[i];
+			struct idxd_wq *wq = idxd->wqs[i];
 
 			mutex_lock(&wq->wq_lock);
 			idxd_wq_disable_cleanup(wq);
@@ -678,7 +655,7 @@ static ssize_t group_work_queues_show(struct device *dev,
 	struct idxd_device *idxd = group->idxd;
 
 	for (i = 0; i < idxd->max_wqs; i++) {
-		struct idxd_wq *wq = &idxd->wqs[i];
+		struct idxd_wq *wq = idxd->wqs[i];
 
 		if (!wq->group)
 			continue;
@@ -935,7 +912,7 @@ static int total_claimed_wq_size(struct idxd_device *idxd)
 	int wq_size = 0;
 
 	for (i = 0; i < idxd->max_wqs; i++) {
-		struct idxd_wq *wq = &idxd->wqs[i];
+		struct idxd_wq *wq = idxd->wqs[i];
 
 		wq_size += wq->size;
 	}
@@ -1331,6 +1308,20 @@ static const struct attribute_group *idxd_wq_attribute_groups[] = {
 	NULL,
 };
 
+static void idxd_conf_wq_release(struct device *dev)
+{
+	struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
+
+	kfree(wq->wqcfg);
+	kfree(wq);
+}
+
+struct device_type idxd_wq_device_type = {
+	.name = "wq",
+	.release = idxd_conf_wq_release,
+	.groups = idxd_wq_attribute_groups,
+};
+
 /* IDXD device attribs */
 static ssize_t version_show(struct device *dev, struct device_attribute *attr,
 			    char *buf)
@@ -1461,7 +1452,7 @@ static ssize_t clients_show(struct device *dev,
 
 	spin_lock_irqsave(&idxd->dev_lock, flags);
 	for (i = 0; i < idxd->max_wqs; i++) {
-		struct idxd_wq *wq = &idxd->wqs[i];
+		struct idxd_wq *wq = idxd->wqs[i];
 
 		count += wq->client_count;
 	}
@@ -1711,70 +1702,67 @@ cleanup:
 	return rc;
 }
 
-static int idxd_setup_wq_sysfs(struct idxd_device *idxd)
+static int idxd_register_wq_devices(struct idxd_device *idxd)
 {
-	struct device *dev = &idxd->pdev->dev;
-	int i, rc;
+	int i, rc, j;
 
 	for (i = 0; i < idxd->max_wqs; i++) {
-		struct idxd_wq *wq = &idxd->wqs[i];
-
-		wq->conf_dev.parent = &idxd->conf_dev;
-		dev_set_name(&wq->conf_dev, "wq%d.%d", idxd->id, wq->id);
-		wq->conf_dev.bus = idxd_get_bus_type(idxd);
-		wq->conf_dev.groups = idxd_wq_attribute_groups;
-		wq->conf_dev.type = &idxd_wq_device_type;
-		dev_dbg(dev, "WQ device register: %s\n",
-			dev_name(&wq->conf_dev));
-		rc = device_register(&wq->conf_dev);
-		if (rc < 0) {
-			put_device(&wq->conf_dev);
+		struct idxd_wq *wq = idxd->wqs[i];
+
+		rc = device_add(&wq->conf_dev);
+		if (rc < 0)
 			goto cleanup;
-		}
 	}
 
 	return 0;
 
 cleanup:
-	while (i--) {
-		struct idxd_wq *wq = &idxd->wqs[i];
+	j = i - 1;
+	for (; i < idxd->max_wqs; i++)
+		put_device(&idxd->wqs[i]->conf_dev);
 
-		device_unregister(&wq->conf_dev);
-	}
+	while (j--)
+		device_unregister(&idxd->wqs[j]->conf_dev);
 	return rc;
 }
 
 int idxd_register_devices(struct idxd_device *idxd)
 {
 	struct device *dev = &idxd->pdev->dev;
-	int rc;
+	int rc, i;
 
 	rc = device_add(&idxd->conf_dev);
 	if (rc < 0)
 		return rc;
 
-	rc = idxd_setup_wq_sysfs(idxd);
+	rc = idxd_register_wq_devices(idxd);
 	if (rc < 0) {
-		/* unregister conf dev */
-		dev_dbg(dev, "Work Queue sysfs registering failed: %d\n", rc);
-		return rc;
+		dev_dbg(dev, "WQ devices registering failed: %d\n", rc);
+		goto err_wq;
 	}
 
 	rc = idxd_setup_group_sysfs(idxd);
 	if (rc < 0) {
 		/* unregister conf dev */
 		dev_dbg(dev, "Group sysfs registering failed: %d\n", rc);
-		return rc;
+		goto err;
 	}
 
 	rc = idxd_setup_engine_sysfs(idxd);
 	if (rc < 0) {
 		/* unregister conf dev */
 		dev_dbg(dev, "Engine sysfs registering failed: %d\n", rc);
-		return rc;
+		goto err;
 	}
 
 	return 0;
+
+ err:
+	for (i = 0; i < idxd->max_wqs; i++)
+		device_unregister(&idxd->wqs[i]->conf_dev);
+ err_wq:
+	device_del(&idxd->conf_dev);
+	return rc;
 }
 
 void idxd_unregister_devices(struct idxd_device *idxd)
@@ -1782,7 +1770,7 @@ void idxd_unregister_devices(struct idxd_device *idxd)
 	int i;
 
 	for (i = 0; i < idxd->max_wqs; i++) {
-		struct idxd_wq *wq = &idxd->wqs[i];
+		struct idxd_wq *wq = idxd->wqs[i];
 
 		device_unregister(&wq->conf_dev);
 	}
-- 
cgit v1.2.3


From 75b911309060f42ba94bbbf46f5f497d35d5cd02 Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Thu, 15 Apr 2021 16:37:44 -0700
Subject: dmaengine: idxd: fix engine conf_dev lifetime

Remove devm_* allocation and fix engine->conf_dev 'struct device'
lifetime. Address issues flagged by CONFIG_DEBUG_KOBJECT_RELEASE.
Add release functions in order to free the allocated memory at the
engine conf_dev destruction time.

Reported-by: Jason Gunthorpe <jgg@nvidia.com>
Fixes: bfe1d56091c1 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852986460.2203940.16603218225412118431.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/device.c |  2 +-
 drivers/dma/idxd/idxd.h   |  3 +-
 drivers/dma/idxd/init.c   | 60 ++++++++++++++++++++++++++++++---------
 drivers/dma/idxd/sysfs.c  | 72 +++++++++++++++++++++++------------------------
 4 files changed, 86 insertions(+), 51 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index c4183294a704..be1dcddfe3c4 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -786,7 +786,7 @@ static int idxd_engines_setup(struct idxd_device *idxd)
 	}
 
 	for (i = 0; i < idxd->max_engines; i++) {
-		eng = &idxd->engines[i];
+		eng = idxd->engines[i];
 		group = eng->group;
 
 		if (!group)
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 6cade6a05314..b9b7e8e8c384 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -195,7 +195,7 @@ struct idxd_device {
 	struct completion *cmd_done;
 	struct idxd_group *groups;
 	struct idxd_wq **wqs;
-	struct idxd_engine *engines;
+	struct idxd_engine **engines;
 
 	struct iommu_sva *sva;
 	unsigned int pasid;
@@ -259,6 +259,7 @@ extern bool support_enqcmd;
 extern struct device_type dsa_device_type;
 extern struct device_type iax_device_type;
 extern struct device_type idxd_wq_device_type;
+extern struct device_type idxd_engine_device_type;
 
 static inline bool is_dsa_dev(struct device *dev)
 {
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index a2dca27aebc3..b90ef2f519eb 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -196,6 +196,46 @@ static int idxd_setup_wqs(struct idxd_device *idxd)
 	return rc;
 }
 
+static int idxd_setup_engines(struct idxd_device *idxd)
+{
+	struct idxd_engine *engine;
+	struct device *dev = &idxd->pdev->dev;
+	int i, rc;
+
+	idxd->engines = kcalloc_node(idxd->max_engines, sizeof(struct idxd_engine *),
+				     GFP_KERNEL, dev_to_node(dev));
+	if (!idxd->engines)
+		return -ENOMEM;
+
+	for (i = 0; i < idxd->max_engines; i++) {
+		engine = kzalloc_node(sizeof(*engine), GFP_KERNEL, dev_to_node(dev));
+		if (!engine) {
+			rc = -ENOMEM;
+			goto err;
+		}
+
+		engine->id = i;
+		engine->idxd = idxd;
+		device_initialize(&engine->conf_dev);
+		engine->conf_dev.parent = &idxd->conf_dev;
+		engine->conf_dev.type = &idxd_engine_device_type;
+		rc = dev_set_name(&engine->conf_dev, "engine%d.%d", idxd->id, engine->id);
+		if (rc < 0) {
+			put_device(&engine->conf_dev);
+			goto err;
+		}
+
+		idxd->engines[i] = engine;
+	}
+
+	return 0;
+
+ err:
+	while (--i >= 0)
+		put_device(&idxd->engines[i]->conf_dev);
+	return rc;
+}
+
 static int idxd_setup_internals(struct idxd_device *idxd)
 {
 	struct device *dev = &idxd->pdev->dev;
@@ -207,6 +247,10 @@ static int idxd_setup_internals(struct idxd_device *idxd)
 	if (rc < 0)
 		return rc;
 
+	rc = idxd_setup_engines(idxd);
+	if (rc < 0)
+		goto err_engine;
+
 	idxd->groups = devm_kcalloc(dev, idxd->max_groups,
 				    sizeof(struct idxd_group), GFP_KERNEL);
 	if (!idxd->groups) {
@@ -221,19 +265,6 @@ static int idxd_setup_internals(struct idxd_device *idxd)
 		idxd->groups[i].tc_b = -1;
 	}
 
-	idxd->engines = devm_kcalloc(dev, idxd->max_engines,
-				     sizeof(struct idxd_engine), GFP_KERNEL);
-	if (!idxd->engines) {
-		rc = -ENOMEM;
-		goto err;
-	}
-
-
-	for (i = 0; i < idxd->max_engines; i++) {
-		idxd->engines[i].idxd = idxd;
-		idxd->engines[i].id = i;
-	}
-
 	idxd->wq = create_workqueue(dev_name(dev));
 	if (!idxd->wq) {
 		rc = -ENOMEM;
@@ -243,6 +274,9 @@ static int idxd_setup_internals(struct idxd_device *idxd)
 	return 0;
 
  err:
+	for (i = 0; i < idxd->max_engines; i++)
+		put_device(&idxd->engines[i]->conf_dev);
+ err_engine:
 	for (i = 0; i < idxd->max_wqs; i++)
 		put_device(&idxd->wqs[i]->conf_dev);
 	return rc;
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 409b3ce52f07..ab02e3b4d75d 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -26,11 +26,6 @@ static struct device_type idxd_group_device_type = {
 	.release = idxd_conf_sub_device_release,
 };
 
-static struct device_type idxd_engine_device_type = {
-	.name = "engine",
-	.release = idxd_conf_sub_device_release,
-};
-
 static int idxd_config_bus_match(struct device *dev,
 				 struct device_driver *drv)
 {
@@ -464,6 +459,19 @@ static const struct attribute_group *idxd_engine_attribute_groups[] = {
 	NULL,
 };
 
+static void idxd_conf_engine_release(struct device *dev)
+{
+	struct idxd_engine *engine = container_of(dev, struct idxd_engine, conf_dev);
+
+	kfree(engine);
+}
+
+struct device_type idxd_engine_device_type = {
+	.name = "engine",
+	.release = idxd_conf_engine_release,
+	.groups = idxd_engine_attribute_groups,
+};
+
 /* Group attributes */
 
 static void idxd_set_free_tokens(struct idxd_device *idxd)
@@ -626,7 +634,7 @@ static ssize_t group_engines_show(struct device *dev,
 	struct idxd_device *idxd = group->idxd;
 
 	for (i = 0; i < idxd->max_engines; i++) {
-		struct idxd_engine *engine = &idxd->engines[i];
+		struct idxd_engine *engine = idxd->engines[i];
 
 		if (!engine->group)
 			continue;
@@ -1634,37 +1642,27 @@ struct device_type iax_device_type = {
 	.groups = idxd_attribute_groups,
 };
 
-static int idxd_setup_engine_sysfs(struct idxd_device *idxd)
+static int idxd_register_engine_devices(struct idxd_device *idxd)
 {
-	struct device *dev = &idxd->pdev->dev;
-	int i, rc;
+	int i, j, rc;
 
 	for (i = 0; i < idxd->max_engines; i++) {
-		struct idxd_engine *engine = &idxd->engines[i];
-
-		engine->conf_dev.parent = &idxd->conf_dev;
-		dev_set_name(&engine->conf_dev, "engine%d.%d",
-			     idxd->id, engine->id);
-		engine->conf_dev.bus = idxd_get_bus_type(idxd);
-		engine->conf_dev.groups = idxd_engine_attribute_groups;
-		engine->conf_dev.type = &idxd_engine_device_type;
-		dev_dbg(dev, "Engine device register: %s\n",
-			dev_name(&engine->conf_dev));
-		rc = device_register(&engine->conf_dev);
-		if (rc < 0) {
-			put_device(&engine->conf_dev);
+		struct idxd_engine *engine = idxd->engines[i];
+
+		rc = device_add(&engine->conf_dev);
+		if (rc < 0)
 			goto cleanup;
-		}
 	}
 
 	return 0;
 
 cleanup:
-	while (i--) {
-		struct idxd_engine *engine = &idxd->engines[i];
+	j = i - 1;
+	for (; i < idxd->max_engines; i++)
+		put_device(&idxd->engines[i]->conf_dev);
 
-		device_unregister(&engine->conf_dev);
-	}
+	while (j--)
+		device_unregister(&idxd->engines[j]->conf_dev);
 	return rc;
 }
 
@@ -1741,23 +1739,25 @@ int idxd_register_devices(struct idxd_device *idxd)
 		goto err_wq;
 	}
 
-	rc = idxd_setup_group_sysfs(idxd);
+	rc = idxd_register_engine_devices(idxd);
 	if (rc < 0) {
-		/* unregister conf dev */
-		dev_dbg(dev, "Group sysfs registering failed: %d\n", rc);
-		goto err;
+		dev_dbg(dev, "Engine devices registering failed: %d\n", rc);
+		goto err_engine;
 	}
 
-	rc = idxd_setup_engine_sysfs(idxd);
+	rc = idxd_setup_group_sysfs(idxd);
 	if (rc < 0) {
 		/* unregister conf dev */
-		dev_dbg(dev, "Engine sysfs registering failed: %d\n", rc);
-		goto err;
+		dev_dbg(dev, "Group sysfs registering failed: %d\n", rc);
+		goto err_group;
 	}
 
 	return 0;
 
- err:
+ err_group:
+	for (i = 0; i < idxd->max_engines; i++)
+		device_unregister(&idxd->engines[i]->conf_dev);
+ err_engine:
 	for (i = 0; i < idxd->max_wqs; i++)
 		device_unregister(&idxd->wqs[i]->conf_dev);
  err_wq:
@@ -1776,7 +1776,7 @@ void idxd_unregister_devices(struct idxd_device *idxd)
 	}
 
 	for (i = 0; i < idxd->max_engines; i++) {
-		struct idxd_engine *engine = &idxd->engines[i];
+		struct idxd_engine *engine = idxd->engines[i];
 
 		device_unregister(&engine->conf_dev);
 	}
-- 
cgit v1.2.3


From defe49f96012ca91e8e673cb95b5c30b4a3735e8 Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Thu, 15 Apr 2021 16:37:51 -0700
Subject: dmaengine: idxd: fix group conf_dev lifetime

Remove devm_* allocation and fix group->conf_dev 'struct device'
lifetime. Address issues flagged by CONFIG_DEBUG_KOBJECT_RELEASE.
Add release functions in order to free the allocated memory at the
group->conf_dev destruction time.

Reported-by: Jason Gunthorpe <jgg@nvidia.com>
Fixes: bfe1d56091c1 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852987144.2203940.8830315575880047.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/device.c |  8 +++---
 drivers/dma/idxd/idxd.h   |  3 ++-
 drivers/dma/idxd/init.c   | 68 ++++++++++++++++++++++++++++++++++++-----------
 drivers/dma/idxd/sysfs.c  | 68 +++++++++++++++++++++--------------------------
 4 files changed, 88 insertions(+), 59 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index be1dcddfe3c4..4fef57717049 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -659,7 +659,7 @@ static int idxd_groups_config_write(struct idxd_device *idxd)
 		ioread32(idxd->reg_base + IDXD_GENCFG_OFFSET));
 
 	for (i = 0; i < idxd->max_groups; i++) {
-		struct idxd_group *group = &idxd->groups[i];
+		struct idxd_group *group = idxd->groups[i];
 
 		idxd_group_config_write(group);
 	}
@@ -754,7 +754,7 @@ static void idxd_group_flags_setup(struct idxd_device *idxd)
 
 	/* TC-A 0 and TC-B 1 should be defaults */
 	for (i = 0; i < idxd->max_groups; i++) {
-		struct idxd_group *group = &idxd->groups[i];
+		struct idxd_group *group = idxd->groups[i];
 
 		if (group->tc_a == -1)
 			group->tc_a = group->grpcfg.flags.tc_a = 0;
@@ -781,7 +781,7 @@ static int idxd_engines_setup(struct idxd_device *idxd)
 	struct idxd_group *group;
 
 	for (i = 0; i < idxd->max_groups; i++) {
-		group = &idxd->groups[i];
+		group = idxd->groups[i];
 		group->grpcfg.engines = 0;
 	}
 
@@ -810,7 +810,7 @@ static int idxd_wqs_setup(struct idxd_device *idxd)
 	struct device *dev = &idxd->pdev->dev;
 
 	for (i = 0; i < idxd->max_groups; i++) {
-		group = &idxd->groups[i];
+		group = idxd->groups[i];
 		for (j = 0; j < 4; j++)
 			group->grpcfg.wqs[j] = 0;
 	}
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index b9b7e8e8c384..3c4ce7997c88 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -193,7 +193,7 @@ struct idxd_device {
 
 	spinlock_t dev_lock;	/* spinlock for device */
 	struct completion *cmd_done;
-	struct idxd_group *groups;
+	struct idxd_group **groups;
 	struct idxd_wq **wqs;
 	struct idxd_engine **engines;
 
@@ -260,6 +260,7 @@ extern struct device_type dsa_device_type;
 extern struct device_type iax_device_type;
 extern struct device_type idxd_wq_device_type;
 extern struct device_type idxd_engine_device_type;
+extern struct device_type idxd_group_device_type;
 
 static inline bool is_dsa_dev(struct device *dev)
 {
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index b90ef2f519eb..c20ea6bf09bf 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -236,11 +236,54 @@ static int idxd_setup_engines(struct idxd_device *idxd)
 	return rc;
 }
 
-static int idxd_setup_internals(struct idxd_device *idxd)
+static int idxd_setup_groups(struct idxd_device *idxd)
 {
 	struct device *dev = &idxd->pdev->dev;
+	struct idxd_group *group;
 	int i, rc;
 
+	idxd->groups = kcalloc_node(idxd->max_groups, sizeof(struct idxd_group *),
+				    GFP_KERNEL, dev_to_node(dev));
+	if (!idxd->groups)
+		return -ENOMEM;
+
+	for (i = 0; i < idxd->max_groups; i++) {
+		group = kzalloc_node(sizeof(*group), GFP_KERNEL, dev_to_node(dev));
+		if (!group) {
+			rc = -ENOMEM;
+			goto err;
+		}
+
+		group->id = i;
+		group->idxd = idxd;
+		device_initialize(&group->conf_dev);
+		group->conf_dev.parent = &idxd->conf_dev;
+		group->conf_dev.bus = idxd_get_bus_type(idxd);
+		group->conf_dev.type = &idxd_group_device_type;
+		rc = dev_set_name(&group->conf_dev, "group%d.%d", idxd->id, group->id);
+		if (rc < 0) {
+			put_device(&group->conf_dev);
+			goto err;
+		}
+
+		idxd->groups[i] = group;
+		group->tc_a = -1;
+		group->tc_b = -1;
+	}
+
+	return 0;
+
+ err:
+	while (--i >= 0)
+		put_device(&idxd->groups[i]->conf_dev);
+	return rc;
+}
+
+static int idxd_setup_internals(struct idxd_device *idxd)
+{
+	struct device *dev = &idxd->pdev->dev;
+	int rc, i;
+
 	init_waitqueue_head(&idxd->cmd_waitq);
 
 	rc = idxd_setup_wqs(idxd);
@@ -251,29 +294,22 @@ static int idxd_setup_internals(struct idxd_device *idxd)
 	if (rc < 0)
 		goto err_engine;
 
-	idxd->groups = devm_kcalloc(dev, idxd->max_groups,
-				    sizeof(struct idxd_group), GFP_KERNEL);
-	if (!idxd->groups) {
-		rc = -ENOMEM;
-		goto err;
-	}
-
-	for (i = 0; i < idxd->max_groups; i++) {
-		idxd->groups[i].idxd = idxd;
-		idxd->groups[i].id = i;
-		idxd->groups[i].tc_a = -1;
-		idxd->groups[i].tc_b = -1;
-	}
+	rc = idxd_setup_groups(idxd);
+	if (rc < 0)
+		goto err_group;
 
 	idxd->wq = create_workqueue(dev_name(dev));
 	if (!idxd->wq) {
 		rc = -ENOMEM;
-		goto err;
+		goto err_wkq_create;
 	}
 
 	return 0;
 
- err:
+ err_wkq_create:
+	for (i = 0; i < idxd->max_groups; i++)
+		put_device(&idxd->groups[i]->conf_dev);
+ err_group:
 	for (i = 0; i < idxd->max_engines; i++)
 		put_device(&idxd->engines[i]->conf_dev);
  err_engine:
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index ab02e3b4d75d..f793688039c9 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -16,16 +16,6 @@ static char *idxd_wq_type_names[] = {
 	[IDXD_WQT_USER]		= "user",
 };
 
-static void idxd_conf_sub_device_release(struct device *dev)
-{
-	dev_dbg(dev, "%s for %s\n", __func__, dev_name(dev));
-}
-
-static struct device_type idxd_group_device_type = {
-	.name = "group",
-	.release = idxd_conf_sub_device_release,
-};
-
 static int idxd_config_bus_match(struct device *dev,
 				 struct device_driver *drv)
 {
@@ -435,7 +425,7 @@ static ssize_t engine_group_id_store(struct device *dev,
 
 	if (prevg)
 		prevg->num_engines--;
-	engine->group = &idxd->groups[id];
+	engine->group = idxd->groups[id];
 	engine->group->num_engines++;
 
 	return count;
@@ -479,7 +469,7 @@ static void idxd_set_free_tokens(struct idxd_device *idxd)
 	int i, tokens;
 
 	for (i = 0, tokens = 0; i < idxd->max_groups; i++) {
-		struct idxd_group *g = &idxd->groups[i];
+		struct idxd_group *g = idxd->groups[i];
 
 		tokens += g->tokens_reserved;
 	}
@@ -784,6 +774,19 @@ static const struct attribute_group *idxd_group_attribute_groups[] = {
 	NULL,
 };
 
+static void idxd_conf_group_release(struct device *dev)
+{
+	struct idxd_group *group = container_of(dev, struct idxd_group, conf_dev);
+
+	kfree(group);
+}
+
+struct device_type idxd_group_device_type = {
+	.name = "group",
+	.release = idxd_conf_group_release,
+	.groups = idxd_group_attribute_groups,
+};
+
 /* IDXD work queue attribs */
 static ssize_t wq_clients_show(struct device *dev,
 			       struct device_attribute *attr, char *buf)
@@ -856,7 +859,7 @@ static ssize_t wq_group_id_store(struct device *dev,
 		return count;
 	}
 
-	group = &idxd->groups[id];
+	group = idxd->groups[id];
 	prevg = wq->group;
 
 	if (prevg)
@@ -1666,37 +1669,27 @@ cleanup:
 	return rc;
 }
 
-static int idxd_setup_group_sysfs(struct idxd_device *idxd)
+static int idxd_register_group_devices(struct idxd_device *idxd)
 {
-	struct device *dev = &idxd->pdev->dev;
-	int i, rc;
+	int i, j, rc;
 
 	for (i = 0; i < idxd->max_groups; i++) {
-		struct idxd_group *group = &idxd->groups[i];
-
-		group->conf_dev.parent = &idxd->conf_dev;
-		dev_set_name(&group->conf_dev, "group%d.%d",
-			     idxd->id, group->id);
-		group->conf_dev.bus = idxd_get_bus_type(idxd);
-		group->conf_dev.groups = idxd_group_attribute_groups;
-		group->conf_dev.type = &idxd_group_device_type;
-		dev_dbg(dev, "Group device register: %s\n",
-			dev_name(&group->conf_dev));
-		rc = device_register(&group->conf_dev);
-		if (rc < 0) {
-			put_device(&group->conf_dev);
+		struct idxd_group *group = idxd->groups[i];
+
+		rc = device_add(&group->conf_dev);
+		if (rc < 0)
 			goto cleanup;
-		}
 	}
 
 	return 0;
 
 cleanup:
-	while (i--) {
-		struct idxd_group *group = &idxd->groups[i];
+	j = i - 1;
+	for (; i < idxd->max_groups; i++)
+		put_device(&idxd->groups[i]->conf_dev);
 
-		device_unregister(&group->conf_dev);
-	}
+	while (j--)
+		device_unregister(&idxd->groups[j]->conf_dev);
 	return rc;
 }
 
@@ -1745,10 +1738,9 @@ int idxd_register_devices(struct idxd_device *idxd)
 		goto err_engine;
 	}
 
-	rc = idxd_setup_group_sysfs(idxd);
+	rc = idxd_register_group_devices(idxd);
 	if (rc < 0) {
-		/* unregister conf dev */
-		dev_dbg(dev, "Group sysfs registering failed: %d\n", rc);
+		dev_dbg(dev, "Group device registering failed: %d\n", rc);
 		goto err_group;
 	}
 
@@ -1782,7 +1774,7 @@ void idxd_unregister_devices(struct idxd_device *idxd)
 	}
 
 	for (i = 0; i < idxd->max_groups; i++) {
-		struct idxd_group *group = &idxd->groups[i];
+		struct idxd_group *group = idxd->groups[i];
 
 		device_unregister(&group->conf_dev);
 	}
-- 
cgit v1.2.3


From 04922b7445a1950b86f130a1fe8c52cc27b3e30b Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Thu, 15 Apr 2021 16:37:57 -0700
Subject: dmaengine: idxd: fix cdev setup and free device lifetime issues

The char device setup and cleanup has device lifetime issues regarding when
parts are initialized and cleaned up. The initialization of struct device is
done incorrectly. device_initialize() needs to be called on the 'struct
device' and then additional changes can be added. The ->release() function
needs to be setup via device_type before dev_set_name() to allow proper
cleanup. The change re-parents the cdev under the wq->conf_dev to get
natural reference inheritance. No known dependency on the old device path exists.

Reported-by: Jason Gunthorpe <jgg@nvidia.com>
Fixes: 42d279f9137a ("dmaengine: idxd: add char driver to expose submission portal to userland")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/161852987721.2203940.1478218825576630810.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/cdev.c  | 129 +++++++++++++++++------------------------------
 drivers/dma/idxd/idxd.h  |   7 +--
 drivers/dma/idxd/init.c  |   2 +-
 drivers/dma/idxd/irq.c   |   4 +-
 drivers/dma/idxd/sysfs.c |  10 +++-
 5 files changed, 63 insertions(+), 89 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c
index 0db9b82ed8cf..1d8a3876b745 100644
--- a/drivers/dma/idxd/cdev.c
+++ b/drivers/dma/idxd/cdev.c
@@ -39,15 +39,15 @@ struct idxd_user_context {
 	struct iommu_sva *sva;
 };
 
-enum idxd_cdev_cleanup {
-	CDEV_NORMAL = 0,
-	CDEV_FAILED,
-};
-
 static void idxd_cdev_dev_release(struct device *dev)
 {
-	dev_dbg(dev, "releasing cdev device\n");
-	kfree(dev);
+	struct idxd_cdev *idxd_cdev = container_of(dev, struct idxd_cdev, dev);
+	struct idxd_cdev_context *cdev_ctx;
+	struct idxd_wq *wq = idxd_cdev->wq;
+
+	cdev_ctx = &ictx[wq->idxd->type];
+	ida_simple_remove(&cdev_ctx->minor_ida, idxd_cdev->minor);
+	kfree(idxd_cdev);
 }
 
 static struct device_type idxd_cdev_device_type = {
@@ -62,14 +62,11 @@ static inline struct idxd_cdev *inode_idxd_cdev(struct inode *inode)
 	return container_of(cdev, struct idxd_cdev, cdev);
 }
 
-static inline struct idxd_wq *idxd_cdev_wq(struct idxd_cdev *idxd_cdev)
-{
-	return container_of(idxd_cdev, struct idxd_wq, idxd_cdev);
-}
-
 static inline struct idxd_wq *inode_wq(struct inode *inode)
 {
-	return idxd_cdev_wq(inode_idxd_cdev(inode));
+	struct idxd_cdev *idxd_cdev = inode_idxd_cdev(inode);
+
+	return idxd_cdev->wq;
 }
 
 static int idxd_cdev_open(struct inode *inode, struct file *filp)
@@ -220,11 +217,10 @@ static __poll_t idxd_cdev_poll(struct file *filp,
 	struct idxd_user_context *ctx = filp->private_data;
 	struct idxd_wq *wq = ctx->wq;
 	struct idxd_device *idxd = wq->idxd;
-	struct idxd_cdev *idxd_cdev = &wq->idxd_cdev;
 	unsigned long flags;
 	__poll_t out = 0;
 
-	poll_wait(filp, &idxd_cdev->err_queue, wait);
+	poll_wait(filp, &wq->err_queue, wait);
 	spin_lock_irqsave(&idxd->dev_lock, flags);
 	if (idxd->sw_err.valid)
 		out = EPOLLIN | EPOLLRDNORM;
@@ -246,98 +242,67 @@ int idxd_cdev_get_major(struct idxd_device *idxd)
 	return MAJOR(ictx[idxd->type].devt);
 }
 
-static int idxd_wq_cdev_dev_setup(struct idxd_wq *wq)
+int idxd_wq_add_cdev(struct idxd_wq *wq)
 {
 	struct idxd_device *idxd = wq->idxd;
-	struct idxd_cdev *idxd_cdev = &wq->idxd_cdev;
-	struct idxd_cdev_context *cdev_ctx;
+	struct idxd_cdev *idxd_cdev;
+	struct cdev *cdev;
 	struct device *dev;
-	int minor, rc;
+	struct idxd_cdev_context *cdev_ctx;
+	int rc, minor;
 
-	idxd_cdev->dev = kzalloc(sizeof(*idxd_cdev->dev), GFP_KERNEL);
-	if (!idxd_cdev->dev)
+	idxd_cdev = kzalloc(sizeof(*idxd_cdev), GFP_KERNEL);
+	if (!idxd_cdev)
 		return -ENOMEM;
 
-	dev = idxd_cdev->dev;
-	dev->parent = &idxd->pdev->dev;
-	dev_set_name(dev, "%s/wq%u.%u", idxd_get_dev_name(idxd),
-		     idxd->id, wq->id);
-	dev->bus = idxd_get_bus_type(idxd);
-
+	idxd_cdev->wq = wq;
+	cdev = &idxd_cdev->cdev;
+	dev = &idxd_cdev->dev;
 	cdev_ctx = &ictx[wq->idxd->type];
 	minor = ida_simple_get(&cdev_ctx->minor_ida, 0, MINORMASK, GFP_KERNEL);
 	if (minor < 0) {
-		rc = minor;
-		kfree(dev);
-		goto ida_err;
-	}
-
-	dev->devt = MKDEV(MAJOR(cdev_ctx->devt), minor);
-	dev->type = &idxd_cdev_device_type;
-	rc = device_register(dev);
-	if (rc < 0) {
-		dev_err(&idxd->pdev->dev, "device register failed\n");
-		goto dev_reg_err;
+		kfree(idxd_cdev);
+		return minor;
 	}
 	idxd_cdev->minor = minor;
 
-	return 0;
-
- dev_reg_err:
-	ida_simple_remove(&cdev_ctx->minor_ida, MINOR(dev->devt));
-	put_device(dev);
- ida_err:
-	idxd_cdev->dev = NULL;
-	return rc;
-}
-
-static void idxd_wq_cdev_cleanup(struct idxd_wq *wq,
-				 enum idxd_cdev_cleanup cdev_state)
-{
-	struct idxd_cdev *idxd_cdev = &wq->idxd_cdev;
-	struct idxd_cdev_context *cdev_ctx;
-
-	cdev_ctx = &ictx[wq->idxd->type];
-	if (cdev_state == CDEV_NORMAL)
-		cdev_del(&idxd_cdev->cdev);
-	device_unregister(idxd_cdev->dev);
-	/*
-	 * The device_type->release() will be called on the device and free
-	 * the allocated struct device. We can just forget it.
-	 */
-	ida_simple_remove(&cdev_ctx->minor_ida, idxd_cdev->minor);
-	idxd_cdev->dev = NULL;
-	idxd_cdev->minor = -1;
-}
-
-int idxd_wq_add_cdev(struct idxd_wq *wq)
-{
-	struct idxd_cdev *idxd_cdev = &wq->idxd_cdev;
-	struct cdev *cdev = &idxd_cdev->cdev;
-	struct device *dev;
-	int rc;
+	device_initialize(dev);
+	dev->parent = &wq->conf_dev;
+	dev->bus = idxd_get_bus_type(idxd);
+	dev->type = &idxd_cdev_device_type;
+	dev->devt = MKDEV(MAJOR(cdev_ctx->devt), minor);
 
-	rc = idxd_wq_cdev_dev_setup(wq);
+	rc = dev_set_name(dev, "%s/wq%u.%u", idxd_get_dev_name(idxd),
+			  idxd->id, wq->id);
 	if (rc < 0)
-		return rc;
+		goto err;
 
-	dev = idxd_cdev->dev;
+	wq->idxd_cdev = idxd_cdev;
 	cdev_init(cdev, &idxd_cdev_fops);
-	cdev_set_parent(cdev, &dev->kobj);
-	rc = cdev_add(cdev, dev->devt, 1);
+	rc = cdev_device_add(cdev, dev);
 	if (rc) {
 		dev_dbg(&wq->idxd->pdev->dev, "cdev_add failed: %d\n", rc);
-		idxd_wq_cdev_cleanup(wq, CDEV_FAILED);
-		return rc;
+		goto err;
 	}
 
-	init_waitqueue_head(&idxd_cdev->err_queue);
 	return 0;
+
+ err:
+	put_device(dev);
+	wq->idxd_cdev = NULL;
+	return rc;
 }
 
 void idxd_wq_del_cdev(struct idxd_wq *wq)
 {
-	idxd_wq_cdev_cleanup(wq, CDEV_NORMAL);
+	struct idxd_cdev *idxd_cdev;
+	struct idxd_cdev_context *cdev_ctx;
+
+	cdev_ctx = &ictx[wq->idxd->type];
+	idxd_cdev = wq->idxd_cdev;
+	wq->idxd_cdev = NULL;
+	cdev_device_del(&idxd_cdev->cdev, &idxd_cdev->dev);
+	put_device(&idxd_cdev->dev);
 }
 
 int idxd_cdev_register(void)
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 3c4ce7997c88..89daf746d121 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -80,10 +80,10 @@ enum idxd_wq_type {
 };
 
 struct idxd_cdev {
+	struct idxd_wq *wq;
 	struct cdev cdev;
-	struct device *dev;
+	struct device dev;
 	int minor;
-	struct wait_queue_head err_queue;
 };
 
 #define IDXD_ALLOCATED_BATCH_SIZE	128U
@@ -109,7 +109,8 @@ struct idxd_dma_chan {
 struct idxd_wq {
 	void __iomem *portal;
 	struct device conf_dev;
-	struct idxd_cdev idxd_cdev;
+	struct idxd_cdev *idxd_cdev;
+	struct wait_queue_head err_queue;
 	struct idxd_device *idxd;
 	int id;
 	enum idxd_wq_type type;
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index c20ea6bf09bf..07cf7977a045 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -176,7 +176,7 @@ static int idxd_setup_wqs(struct idxd_device *idxd)
 		}
 
 		mutex_init(&wq->wq_lock);
-		wq->idxd_cdev.minor = -1;
+		init_waitqueue_head(&wq->err_queue);
 		wq->max_xfer_bytes = idxd->max_xfer_bytes;
 		wq->max_batch_size = idxd->max_batch_size;
 		wq->wqcfg = kzalloc_node(idxd->wqcfg_size, GFP_KERNEL, dev_to_node(dev));
diff --git a/drivers/dma/idxd/irq.c b/drivers/dma/idxd/irq.c
index 7b0181532f77..fc0781e3f36d 100644
--- a/drivers/dma/idxd/irq.c
+++ b/drivers/dma/idxd/irq.c
@@ -133,7 +133,7 @@ static int process_misc_interrupts(struct idxd_device *idxd, u32 cause)
 			struct idxd_wq *wq = idxd->wqs[id];
 
 			if (wq->type == IDXD_WQT_USER)
-				wake_up_interruptible(&wq->idxd_cdev.err_queue);
+				wake_up_interruptible(&wq->err_queue);
 		} else {
 			int i;
 
@@ -141,7 +141,7 @@ static int process_misc_interrupts(struct idxd_device *idxd, u32 cause)
 				struct idxd_wq *wq = idxd->wqs[i];
 
 				if (wq->type == IDXD_WQT_USER)
-					wake_up_interruptible(&wq->idxd_cdev.err_queue);
+					wake_up_interruptible(&wq->err_queue);
 			}
 		}
 
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index f793688039c9..9586b55abce5 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -1169,8 +1169,16 @@ static ssize_t wq_cdev_minor_show(struct device *dev,
 				  struct device_attribute *attr, char *buf)
 {
 	struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
+	int minor = -1;
 
-	return sprintf(buf, "%d\n", wq->idxd_cdev.minor);
+	mutex_lock(&wq->wq_lock);
+	if (wq->idxd_cdev)
+		minor = wq->idxd_cdev->minor;
+	mutex_unlock(&wq->wq_lock);
+
+	if (minor == -1)
+		return -ENXIO;
+	return sysfs_emit(buf, "%d\n", minor);
 }
 
 static struct device_attribute dev_attr_wq_cdev_minor =
-- 
cgit v1.2.3


From 4b73e4ebd43ce48101a4c09bf13d439a954d61c5 Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Thu, 15 Apr 2021 16:38:03 -0700
Subject: dmaengine: idxd: iax bus removal

There is no need to have an additional bus for the IAX device. The removal
of IAX will change user ABI as /sys/bus/iax will no longer exist.
The iax device will be moved to the dsa bus. The device id for dsa and
iax will now be combined rather than unique for each device type in order
to accommodate the iax devices. This is in preparation for fixing the
sub-driver code for idxd. There's no hardware deployment for Sapphire
Rapids platform yet, which means that users have no reason to have
developed scripts against this ABI. There is some exposure to
released versions of accel-config, but those are being fixed up and
an accel-config upgrade is reasonable to get IAX support. As far as
accel-config is concerned IAX support starts when these devices appear
under /sys/bus/dsa, and old accel-config just assumes that an empty /
missing /sys/bus/iax just means a lack of platform support.

Fixes: f25b463883a8 ("dmaengine: idxd: add IAX configuration support in the IDXD driver")
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852988298.2203940.4529909758034944428.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/cdev.c  |  2 +-
 drivers/dma/idxd/idxd.h  |  3 +-
 drivers/dma/idxd/init.c  | 21 ++++----------
 drivers/dma/idxd/sysfs.c | 74 ++++--------------------------------------------
 4 files changed, 13 insertions(+), 87 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c
index 1d8a3876b745..2d976905b2a3 100644
--- a/drivers/dma/idxd/cdev.c
+++ b/drivers/dma/idxd/cdev.c
@@ -268,7 +268,7 @@ int idxd_wq_add_cdev(struct idxd_wq *wq)
 
 	device_initialize(dev);
 	dev->parent = &wq->conf_dev;
-	dev->bus = idxd_get_bus_type(idxd);
+	dev->bus = &dsa_bus_type;
 	dev->type = &idxd_cdev_device_type;
 	dev->devt = MKDEV(MAJOR(cdev_ctx->devt), minor);
 
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 89daf746d121..b17415aa42bd 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -257,6 +257,7 @@ extern struct bus_type dsa_bus_type;
 extern struct bus_type iax_bus_type;
 
 extern bool support_enqcmd;
+extern struct ida idxd_ida;
 extern struct device_type dsa_device_type;
 extern struct device_type iax_device_type;
 extern struct device_type idxd_wq_device_type;
@@ -346,7 +347,6 @@ static inline int idxd_wq_refcount(struct idxd_wq *wq)
 	return wq->client_count;
 };
 
-struct ida *idxd_ida(struct idxd_device *idxd);
 const char *idxd_get_dev_name(struct idxd_device *idxd);
 int idxd_register_bus_type(void);
 void idxd_unregister_bus_type(void);
@@ -354,7 +354,6 @@ int idxd_register_devices(struct idxd_device *idxd);
 void idxd_unregister_devices(struct idxd_device *idxd);
 int idxd_register_driver(void);
 void idxd_unregister_driver(void);
-struct bus_type *idxd_get_bus_type(struct idxd_device *idxd);
 struct device_type *idxd_get_device_type(struct idxd_device *idxd);
 
 /* device interrupt control */
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index 07cf7977a045..be922a8c2784 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -33,8 +33,7 @@ MODULE_PARM_DESC(sva, "Toggle SVA support on/off");
 #define DRV_NAME "idxd"
 
 bool support_enqcmd;
-
-static struct ida idxd_idas[IDXD_TYPE_MAX];
+DEFINE_IDA(idxd_ida);
 
 static struct pci_device_id idxd_pci_tbl[] = {
 	/* DSA ver 1.0 platforms */
@@ -51,11 +50,6 @@ static char *idxd_name[] = {
 	"iax"
 };
 
-struct ida *idxd_ida(struct idxd_device *idxd)
-{
-	return &idxd_idas[idxd->type];
-}
-
 const char *idxd_get_dev_name(struct idxd_device *idxd)
 {
 	return idxd_name[idxd->type];
@@ -167,7 +161,7 @@ static int idxd_setup_wqs(struct idxd_device *idxd)
 		wq->idxd = idxd;
 		device_initialize(&wq->conf_dev);
 		wq->conf_dev.parent = &idxd->conf_dev;
-		wq->conf_dev.bus = idxd_get_bus_type(idxd);
+		wq->conf_dev.bus = &dsa_bus_type;
 		wq->conf_dev.type = &idxd_wq_device_type;
 		rc = dev_set_name(&wq->conf_dev, "wq%d.%d", idxd->id, wq->id);
 		if (rc < 0) {
@@ -258,7 +252,7 @@ static int idxd_setup_groups(struct idxd_device *idxd)
 		group->idxd = idxd;
 		device_initialize(&group->conf_dev);
 		group->conf_dev.parent = &idxd->conf_dev;
-		group->conf_dev.bus = idxd_get_bus_type(idxd);
+		group->conf_dev.bus = &dsa_bus_type;
 		group->conf_dev.type = &idxd_group_device_type;
 		rc = dev_set_name(&group->conf_dev, "group%d.%d", idxd->id, group->id);
 		if (rc < 0) {
@@ -409,13 +403,13 @@ static struct idxd_device *idxd_alloc(struct pci_dev *pdev)
 
 	idxd->pdev = pdev;
 	idxd_set_type(idxd);
-	idxd->id = ida_alloc(idxd_ida(idxd), GFP_KERNEL);
+	idxd->id = ida_alloc(&idxd_ida, GFP_KERNEL);
 	if (idxd->id < 0)
 		return NULL;
 
 	device_initialize(&idxd->conf_dev);
 	idxd->conf_dev.parent = dev;
-	idxd->conf_dev.bus = idxd_get_bus_type(idxd);
+	idxd->conf_dev.bus = &dsa_bus_type;
 	idxd->conf_dev.type = idxd_get_device_type(idxd);
 	rc = dev_set_name(&idxd->conf_dev, "%s%d", idxd_get_dev_name(idxd), idxd->id);
 	if (rc < 0) {
@@ -669,7 +663,7 @@ static struct pci_driver idxd_pci_driver = {
 
 static int __init idxd_init_module(void)
 {
-	int err, i;
+	int err;
 
 	/*
 	 * If the CPU does not support MOVDIR64B or ENQCMDS, there's no point in
@@ -685,9 +679,6 @@ static int __init idxd_init_module(void)
 	else
 		support_enqcmd = true;
 
-	for (i = 0; i < IDXD_TYPE_MAX; i++)
-		ida_init(&idxd_idas[i]);
-
 	err = idxd_register_bus_type();
 	if (err < 0)
 		return err;
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 9586b55abce5..b97a0a817dfb 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -301,19 +301,6 @@ struct bus_type dsa_bus_type = {
 	.shutdown = idxd_config_bus_shutdown,
 };
 
-struct bus_type iax_bus_type = {
-	.name = "iax",
-	.match = idxd_config_bus_match,
-	.probe = idxd_config_bus_probe,
-	.remove = idxd_config_bus_remove,
-	.shutdown = idxd_config_bus_shutdown,
-};
-
-static struct bus_type *idxd_bus_types[] = {
-	&dsa_bus_type,
-	&iax_bus_type
-};
-
 static struct idxd_device_driver dsa_drv = {
 	.drv = {
 		.name = "dsa",
@@ -323,25 +310,6 @@ static struct idxd_device_driver dsa_drv = {
 	},
 };
 
-static struct idxd_device_driver iax_drv = {
-	.drv = {
-		.name = "iax",
-		.bus = &iax_bus_type,
-		.owner = THIS_MODULE,
-		.mod_name = KBUILD_MODNAME,
-	},
-};
-
-static struct idxd_device_driver *idxd_drvs[] = {
-	&dsa_drv,
-	&iax_drv
-};
-
-struct bus_type *idxd_get_bus_type(struct idxd_device *idxd)
-{
-	return idxd_bus_types[idxd->type];
-}
-
 struct device_type *idxd_get_device_type(struct idxd_device *idxd)
 {
 	if (idxd->type == IDXD_TYPE_DSA)
@@ -355,28 +323,12 @@ struct device_type *idxd_get_device_type(struct idxd_device *idxd)
 /* IDXD generic driver setup */
 int idxd_register_driver(void)
 {
-	int i, rc;
-
-	for (i = 0; i < IDXD_TYPE_MAX; i++) {
-		rc = driver_register(&idxd_drvs[i]->drv);
-		if (rc < 0)
-			goto drv_fail;
-	}
-
-	return 0;
-
-drv_fail:
-	while (--i >= 0)
-		driver_unregister(&idxd_drvs[i]->drv);
-	return rc;
+	return driver_register(&dsa_drv.drv);
 }
 
 void idxd_unregister_driver(void)
 {
-	int i;
-
-	for (i = 0; i < IDXD_TYPE_MAX; i++)
-		driver_unregister(&idxd_drvs[i]->drv);
+	driver_unregister(&dsa_drv.drv);
 }
 
 /* IDXD engine attributes */
@@ -1637,7 +1589,7 @@ static void idxd_conf_device_release(struct device *dev)
 	kfree(idxd->wqs);
 	kfree(idxd->engines);
 	kfree(idxd->irq_entries);
-	ida_free(idxd_ida(idxd), idxd->id);
+	ida_free(&idxd_ida, idxd->id);
 	kfree(idxd);
 }
 
@@ -1792,26 +1744,10 @@ void idxd_unregister_devices(struct idxd_device *idxd)
 
 int idxd_register_bus_type(void)
 {
-	int i, rc;
-
-	for (i = 0; i < IDXD_TYPE_MAX; i++) {
-		rc = bus_register(idxd_bus_types[i]);
-		if (rc < 0)
-			goto bus_err;
-	}
-
-	return 0;
-
-bus_err:
-	while (--i >= 0)
-		bus_unregister(idxd_bus_types[i]);
-	return rc;
+	return bus_register(&dsa_bus_type);
 }
 
 void idxd_unregister_bus_type(void)
 {
-	int i;
-
-	for (i = 0; i < IDXD_TYPE_MAX; i++)
-		bus_unregister(idxd_bus_types[i]);
+	bus_unregister(&dsa_bus_type);
 }
-- 
cgit v1.2.3


From 435b512dbc0dac42b34348393049b386bb1a19bd Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Thu, 15 Apr 2021 16:38:09 -0700
Subject: dmaengine: idxd: remove detection of device type

Move all static data type for per device type to an idxd_driver_data data
structure. The data can be attached to the pci_device_id and provided by
the pci probe function. This removes a lot of unnecessary type detection
and setup code.

Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852988924.2203940.2787590808682466398.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/cdev.c   | 11 ++++----
 drivers/dma/idxd/device.c | 16 ++++--------
 drivers/dma/idxd/idxd.h   | 13 +++++++---
 drivers/dma/idxd/init.c   | 65 ++++++++++++++++++-----------------------------
 drivers/dma/idxd/submit.c |  2 +-
 drivers/dma/idxd/sysfs.c  | 16 +++---------
 6 files changed, 48 insertions(+), 75 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c
index 2d976905b2a3..302cba5ff779 100644
--- a/drivers/dma/idxd/cdev.c
+++ b/drivers/dma/idxd/cdev.c
@@ -45,7 +45,7 @@ static void idxd_cdev_dev_release(struct device *dev)
 	struct idxd_cdev_context *cdev_ctx;
 	struct idxd_wq *wq = idxd_cdev->wq;
 
-	cdev_ctx = &ictx[wq->idxd->type];
+	cdev_ctx = &ictx[wq->idxd->data->type];
 	ida_simple_remove(&cdev_ctx->minor_ida, idxd_cdev->minor);
 	kfree(idxd_cdev);
 }
@@ -239,7 +239,7 @@ static const struct file_operations idxd_cdev_fops = {
 
 int idxd_cdev_get_major(struct idxd_device *idxd)
 {
-	return MAJOR(ictx[idxd->type].devt);
+	return MAJOR(ictx[idxd->data->type].devt);
 }
 
 int idxd_wq_add_cdev(struct idxd_wq *wq)
@@ -258,7 +258,7 @@ int idxd_wq_add_cdev(struct idxd_wq *wq)
 	idxd_cdev->wq = wq;
 	cdev = &idxd_cdev->cdev;
 	dev = &idxd_cdev->dev;
-	cdev_ctx = &ictx[wq->idxd->type];
+	cdev_ctx = &ictx[wq->idxd->data->type];
 	minor = ida_simple_get(&cdev_ctx->minor_ida, 0, MINORMASK, GFP_KERNEL);
 	if (minor < 0) {
 		kfree(idxd_cdev);
@@ -272,8 +272,7 @@ int idxd_wq_add_cdev(struct idxd_wq *wq)
 	dev->type = &idxd_cdev_device_type;
 	dev->devt = MKDEV(MAJOR(cdev_ctx->devt), minor);
 
-	rc = dev_set_name(dev, "%s/wq%u.%u", idxd_get_dev_name(idxd),
-			  idxd->id, wq->id);
+	rc = dev_set_name(dev, "%s/wq%u.%u", idxd->data->name_prefix, idxd->id, wq->id);
 	if (rc < 0)
 		goto err;
 
@@ -298,7 +297,7 @@ void idxd_wq_del_cdev(struct idxd_wq *wq)
 	struct idxd_cdev *idxd_cdev;
 	struct idxd_cdev_context *cdev_ctx;
 
-	cdev_ctx = &ictx[wq->idxd->type];
+	cdev_ctx = &ictx[wq->idxd->data->type];
 	idxd_cdev = wq->idxd_cdev;
 	wq->idxd_cdev = NULL;
 	cdev_device_del(&idxd_cdev->cdev, &idxd_cdev->dev);
diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 4fef57717049..016df87cf5c5 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -144,14 +144,8 @@ int idxd_wq_alloc_resources(struct idxd_wq *wq)
 	if (rc < 0)
 		return rc;
 
-	if (idxd->type == IDXD_TYPE_DSA)
-		align = 32;
-	else if (idxd->type == IDXD_TYPE_IAX)
-		align = 64;
-	else
-		return -ENODEV;
-
-	wq->compls_size = num_descs * idxd->compl_size + align;
+	align = idxd->data->align;
+	wq->compls_size = num_descs * idxd->data->compl_size + align;
 	wq->compls_raw = dma_alloc_coherent(dev, wq->compls_size,
 					    &wq->compls_addr_raw, GFP_KERNEL);
 	if (!wq->compls_raw) {
@@ -178,11 +172,11 @@ int idxd_wq_alloc_resources(struct idxd_wq *wq)
 		struct idxd_desc *desc = wq->descs[i];
 
 		desc->hw = wq->hw_descs[i];
-		if (idxd->type == IDXD_TYPE_DSA)
+		if (idxd->data->type == IDXD_TYPE_DSA)
 			desc->completion = &wq->compls[i];
-		else if (idxd->type == IDXD_TYPE_IAX)
+		else if (idxd->data->type == IDXD_TYPE_IAX)
 			desc->iax_completion = &wq->iax_compls[i];
-		desc->compl_dma = wq->compls_addr + idxd->compl_size * i;
+		desc->compl_dma = wq->compls_addr + idxd->data->compl_size * i;
 		desc->id = i;
 		desc->wq = wq;
 		desc->cpu = -1;
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index b17415aa42bd..8055e872953c 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -178,9 +178,17 @@ struct idxd_dma_dev {
 	struct dma_device dma;
 };
 
-struct idxd_device {
+struct idxd_driver_data {
+	const char *name_prefix;
 	enum idxd_type type;
+	struct device_type *dev_type;
+	int compl_size;
+	int align;
+};
+
+struct idxd_device {
 	struct device conf_dev;
+	struct idxd_driver_data *data;
 	struct list_head list;
 	struct idxd_hw hw;
 	enum idxd_device_state state;
@@ -218,7 +226,6 @@ struct idxd_device {
 	int token_limit;
 	int nr_tokens;		/* non-reserved tokens */
 	unsigned int wqcfg_size;
-	int compl_size;
 
 	union sw_err_reg sw_err;
 	wait_queue_head_t cmd_waitq;
@@ -347,14 +354,12 @@ static inline int idxd_wq_refcount(struct idxd_wq *wq)
 	return wq->client_count;
 };
 
-const char *idxd_get_dev_name(struct idxd_device *idxd);
 int idxd_register_bus_type(void);
 void idxd_unregister_bus_type(void);
 int idxd_register_devices(struct idxd_device *idxd);
 void idxd_unregister_devices(struct idxd_device *idxd);
 int idxd_register_driver(void);
 void idxd_unregister_driver(void);
-struct device_type *idxd_get_device_type(struct idxd_device *idxd);
 
 /* device interrupt control */
 void idxd_msix_perm_setup(struct idxd_device *idxd);
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index be922a8c2784..e8f64324bb3a 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -35,26 +35,33 @@ MODULE_PARM_DESC(sva, "Toggle SVA support on/off");
 bool support_enqcmd;
 DEFINE_IDA(idxd_ida);
 
+static struct idxd_driver_data idxd_driver_data[] = {
+	[IDXD_TYPE_DSA] = {
+		.name_prefix = "dsa",
+		.type = IDXD_TYPE_DSA,
+		.compl_size = sizeof(struct dsa_completion_record),
+		.align = 32,
+		.dev_type = &dsa_device_type,
+	},
+	[IDXD_TYPE_IAX] = {
+		.name_prefix = "iax",
+		.type = IDXD_TYPE_IAX,
+		.compl_size = sizeof(struct iax_completion_record),
+		.align = 64,
+		.dev_type = &iax_device_type,
+	},
+};
+
 static struct pci_device_id idxd_pci_tbl[] = {
 	/* DSA ver 1.0 platforms */
-	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_DSA_SPR0) },
+	{ PCI_DEVICE_DATA(INTEL, DSA_SPR0, &idxd_driver_data[IDXD_TYPE_DSA]) },
 
 	/* IAX ver 1.0 platforms */
-	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IAX_SPR0) },
+	{ PCI_DEVICE_DATA(INTEL, IAX_SPR0, &idxd_driver_data[IDXD_TYPE_IAX]) },
 	{ 0, }
 };
 MODULE_DEVICE_TABLE(pci, idxd_pci_tbl);
 
-static char *idxd_name[] = {
-	"dsa",
-	"iax"
-};
-
-const char *idxd_get_dev_name(struct idxd_device *idxd)
-{
-	return idxd_name[idxd->type];
-}
-
 static int idxd_setup_interrupts(struct idxd_device *idxd)
 {
 	struct pci_dev *pdev = idxd->pdev;
@@ -379,19 +386,7 @@ static void idxd_read_caps(struct idxd_device *idxd)
 	}
 }
 
-static inline void idxd_set_type(struct idxd_device *idxd)
-{
-	struct pci_dev *pdev = idxd->pdev;
-
-	if (pdev->device == PCI_DEVICE_ID_INTEL_DSA_SPR0)
-		idxd->type = IDXD_TYPE_DSA;
-	else if (pdev->device == PCI_DEVICE_ID_INTEL_IAX_SPR0)
-		idxd->type = IDXD_TYPE_IAX;
-	else
-		idxd->type = IDXD_TYPE_UNKNOWN;
-}
-
-static struct idxd_device *idxd_alloc(struct pci_dev *pdev)
+static struct idxd_device *idxd_alloc(struct pci_dev *pdev, struct idxd_driver_data *data)
 {
 	struct device *dev = &pdev->dev;
 	struct idxd_device *idxd;
@@ -402,7 +397,7 @@ static struct idxd_device *idxd_alloc(struct pci_dev *pdev)
 		return NULL;
 
 	idxd->pdev = pdev;
-	idxd_set_type(idxd);
+	idxd->data = data;
 	idxd->id = ida_alloc(&idxd_ida, GFP_KERNEL);
 	if (idxd->id < 0)
 		return NULL;
@@ -410,8 +405,8 @@ static struct idxd_device *idxd_alloc(struct pci_dev *pdev)
 	device_initialize(&idxd->conf_dev);
 	idxd->conf_dev.parent = dev;
 	idxd->conf_dev.bus = &dsa_bus_type;
-	idxd->conf_dev.type = idxd_get_device_type(idxd);
-	rc = dev_set_name(&idxd->conf_dev, "%s%d", idxd_get_dev_name(idxd), idxd->id);
+	idxd->conf_dev.type = idxd->data->dev_type;
+	rc = dev_set_name(&idxd->conf_dev, "%s%d", idxd->data->name_prefix, idxd->id);
 	if (rc < 0) {
 		put_device(&idxd->conf_dev);
 		return NULL;
@@ -503,18 +498,11 @@ static int idxd_probe(struct idxd_device *idxd)
 	return rc;
 }
 
-static void idxd_type_init(struct idxd_device *idxd)
-{
-	if (idxd->type == IDXD_TYPE_DSA)
-		idxd->compl_size = sizeof(struct dsa_completion_record);
-	else if (idxd->type == IDXD_TYPE_IAX)
-		idxd->compl_size = sizeof(struct iax_completion_record);
-}
-
 static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 {
 	struct device *dev = &pdev->dev;
 	struct idxd_device *idxd;
+	struct idxd_driver_data *data = (struct idxd_driver_data *)id->driver_data;
 	int rc;
 
 	rc = pci_enable_device(pdev);
@@ -522,7 +510,7 @@ static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		return rc;
 
 	dev_dbg(dev, "Alloc IDXD context\n");
-	idxd = idxd_alloc(pdev);
+	idxd = idxd_alloc(pdev, data);
 	if (!idxd) {
 		rc = -ENOMEM;
 		goto err_idxd_alloc;
@@ -548,9 +536,6 @@ static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	if (rc)
 		goto err;
 
-
-	idxd_type_init(idxd);
-
 	dev_dbg(dev, "Set PCI master\n");
 	pci_set_master(pdev);
 	pci_set_drvdata(pdev, idxd);
diff --git a/drivers/dma/idxd/submit.c b/drivers/dma/idxd/submit.c
index a7a61bcc17d5..dfc8900d5de3 100644
--- a/drivers/dma/idxd/submit.c
+++ b/drivers/dma/idxd/submit.c
@@ -15,7 +15,7 @@ static struct idxd_desc *__get_desc(struct idxd_wq *wq, int idx, int cpu)
 
 	desc = wq->descs[idx];
 	memset(desc->hw, 0, sizeof(struct dsa_hw_desc));
-	memset(desc->completion, 0, idxd->compl_size);
+	memset(desc->completion, 0, idxd->data->compl_size);
 	desc->cpu = cpu;
 
 	if (device_pasid_enabled(idxd))
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index b97a0a817dfb..581ce56ae4f5 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -310,16 +310,6 @@ static struct idxd_device_driver dsa_drv = {
 	},
 };
 
-struct device_type *idxd_get_device_type(struct idxd_device *idxd)
-{
-	if (idxd->type == IDXD_TYPE_DSA)
-		return &dsa_device_type;
-	else if (idxd->type == IDXD_TYPE_IAX)
-		return &iax_device_type;
-	else
-		return NULL;
-}
-
 /* IDXD generic driver setup */
 int idxd_register_driver(void)
 {
@@ -453,7 +443,7 @@ static ssize_t group_tokens_reserved_store(struct device *dev,
 	if (rc < 0)
 		return -EINVAL;
 
-	if (idxd->type == IDXD_TYPE_IAX)
+	if (idxd->data->type == IDXD_TYPE_IAX)
 		return -EOPNOTSUPP;
 
 	if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
@@ -501,7 +491,7 @@ static ssize_t group_tokens_allowed_store(struct device *dev,
 	if (rc < 0)
 		return -EINVAL;
 
-	if (idxd->type == IDXD_TYPE_IAX)
+	if (idxd->data->type == IDXD_TYPE_IAX)
 		return -EOPNOTSUPP;
 
 	if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
@@ -546,7 +536,7 @@ static ssize_t group_use_token_limit_store(struct device *dev,
 	if (rc < 0)
 		return -EINVAL;
 
-	if (idxd->type == IDXD_TYPE_IAX)
+	if (idxd->data->type == IDXD_TYPE_IAX)
 		return -EOPNOTSUPP;
 
 	if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
-- 
cgit v1.2.3


From 2c99e55f795593c5f029f65c4b4ab2a72bb076a3 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Tue, 30 Mar 2021 16:11:32 +0100
Subject: PCI: tegra: Convert to MSI domains

In anticipation of the removal of the msi_controller structure, convert
the Tegra host controller driver to MSI domains.

We end-up with the usual two domain structure, the top one being a
generic PCI/MSI domain, the bottom one being Tegra-specific and handling
the actual HW interrupt allocation.

While at it, convert the normal interrupt handler to a chained handler,
handle the controller's MSI IRQ edge triggered, support multiple MSIs
per device and use the AFI_MSI_EN_VEC* registers to provide MSI masking.

[treding@nvidia.com: fix, clean up and address TODOs from Marc's draft]

Link: https://lore.kernel.org/r/20210330151145.997953-2-maz@kernel.org
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/controller/Kconfig     |   1 -
 drivers/pci/controller/pci-tegra.c | 349 ++++++++++++++++++++-----------------
 2 files changed, 191 insertions(+), 159 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index 5aa8977d7b0f..be8f9ff512a0 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -41,7 +41,6 @@ config PCI_TEGRA
 	bool "NVIDIA Tegra PCIe controller"
 	depends on ARCH_TEGRA || COMPILE_TEST
 	depends on PCI_MSI_IRQ_DOMAIN
-	select PCI_MSI_ARCH_FALLBACKS
 	help
 	  Say Y here if you want support for the PCIe host controller found
 	  on NVIDIA Tegra SoCs.
diff --git a/drivers/pci/controller/pci-tegra.c b/drivers/pci/controller/pci-tegra.c
index 8fcabed7c6a6..8069bd9232d4 100644
--- a/drivers/pci/controller/pci-tegra.c
+++ b/drivers/pci/controller/pci-tegra.c
@@ -21,6 +21,7 @@
 #include <linux/interrupt.h>
 #include <linux/iopoll.h>
 #include <linux/irq.h>
+#include <linux/irqchip/chained_irq.h>
 #include <linux/irqdomain.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
@@ -78,23 +79,8 @@
 #define AFI_MSI_FPCI_BAR_ST	0x64
 #define AFI_MSI_AXI_BAR_ST	0x68
 
-#define AFI_MSI_VEC0		0x6c
-#define AFI_MSI_VEC1		0x70
-#define AFI_MSI_VEC2		0x74
-#define AFI_MSI_VEC3		0x78
-#define AFI_MSI_VEC4		0x7c
-#define AFI_MSI_VEC5		0x80
-#define AFI_MSI_VEC6		0x84
-#define AFI_MSI_VEC7		0x88
-
-#define AFI_MSI_EN_VEC0		0x8c
-#define AFI_MSI_EN_VEC1		0x90
-#define AFI_MSI_EN_VEC2		0x94
-#define AFI_MSI_EN_VEC3		0x98
-#define AFI_MSI_EN_VEC4		0x9c
-#define AFI_MSI_EN_VEC5		0xa0
-#define AFI_MSI_EN_VEC6		0xa4
-#define AFI_MSI_EN_VEC7		0xa8
+#define AFI_MSI_VEC(x)		(0x6c + ((x) * 4))
+#define AFI_MSI_EN_VEC(x)	(0x8c + ((x) * 4))
 
 #define AFI_CONFIGURATION		0xac
 #define  AFI_CONFIGURATION_EN_FPCI		(1 << 0)
@@ -280,10 +266,10 @@
 #define LINK_RETRAIN_TIMEOUT 100000 /* in usec */
 
 struct tegra_msi {
-	struct msi_controller chip;
 	DECLARE_BITMAP(used, INT_PCI_MSI_NR);
 	struct irq_domain *domain;
-	struct mutex lock;
+	struct mutex map_lock;
+	spinlock_t mask_lock;
 	void *virt;
 	dma_addr_t phys;
 	int irq;
@@ -333,11 +319,6 @@ struct tegra_pcie_soc {
 	} ectl;
 };
 
-static inline struct tegra_msi *to_tegra_msi(struct msi_controller *chip)
-{
-	return container_of(chip, struct tegra_msi, chip);
-}
-
 struct tegra_pcie {
 	struct device *dev;
 
@@ -372,6 +353,11 @@ struct tegra_pcie {
 	struct dentry *debugfs;
 };
 
+static inline struct tegra_pcie *msi_to_pcie(struct tegra_msi *msi)
+{
+	return container_of(msi, struct tegra_pcie, msi);
+}
+
 struct tegra_pcie_port {
 	struct tegra_pcie *pcie;
 	struct device_node *np;
@@ -1432,7 +1418,6 @@ static void tegra_pcie_phys_put(struct tegra_pcie *pcie)
 	}
 }
 
-
 static int tegra_pcie_get_resources(struct tegra_pcie *pcie)
 {
 	struct device *dev = pcie->dev;
@@ -1509,6 +1494,7 @@ static int tegra_pcie_get_resources(struct tegra_pcie *pcie)
 phys_put:
 	if (soc->program_uphy)
 		tegra_pcie_phys_put(pcie);
+
 	return err;
 }
 
@@ -1551,161 +1537,227 @@ static void tegra_pcie_pme_turnoff(struct tegra_pcie_port *port)
 	afi_writel(pcie, val, AFI_PCIE_PME);
 }
 
-static int tegra_msi_alloc(struct tegra_msi *chip)
-{
-	int msi;
-
-	mutex_lock(&chip->lock);
-
-	msi = find_first_zero_bit(chip->used, INT_PCI_MSI_NR);
-	if (msi < INT_PCI_MSI_NR)
-		set_bit(msi, chip->used);
-	else
-		msi = -ENOSPC;
-
-	mutex_unlock(&chip->lock);
-
-	return msi;
-}
-
-static void tegra_msi_free(struct tegra_msi *chip, unsigned long irq)
+static void tegra_pcie_msi_irq(struct irq_desc *desc)
 {
-	struct device *dev = chip->chip.dev;
-
-	mutex_lock(&chip->lock);
-
-	if (!test_bit(irq, chip->used))
-		dev_err(dev, "trying to free unused MSI#%lu\n", irq);
-	else
-		clear_bit(irq, chip->used);
-
-	mutex_unlock(&chip->lock);
-}
-
-static irqreturn_t tegra_pcie_msi_irq(int irq, void *data)
-{
-	struct tegra_pcie *pcie = data;
-	struct device *dev = pcie->dev;
+	struct tegra_pcie *pcie = irq_desc_get_handler_data(desc);
+	struct irq_chip *chip = irq_desc_get_chip(desc);
 	struct tegra_msi *msi = &pcie->msi;
-	unsigned int i, processed = 0;
+	struct device *dev = pcie->dev;
+	unsigned int i;
+
+	chained_irq_enter(chip, desc);
 
 	for (i = 0; i < 8; i++) {
-		unsigned long reg = afi_readl(pcie, AFI_MSI_VEC0 + i * 4);
+		unsigned long reg = afi_readl(pcie, AFI_MSI_VEC(i));
 
 		while (reg) {
 			unsigned int offset = find_first_bit(&reg, 32);
 			unsigned int index = i * 32 + offset;
 			unsigned int irq;
 
-			/* clear the interrupt */
-			afi_writel(pcie, 1 << offset, AFI_MSI_VEC0 + i * 4);
-
-			irq = irq_find_mapping(msi->domain, index);
+			irq = irq_find_mapping(msi->domain->parent, index);
 			if (irq) {
-				if (test_bit(index, msi->used))
-					generic_handle_irq(irq);
-				else
-					dev_info(dev, "unhandled MSI\n");
+				generic_handle_irq(irq);
 			} else {
 				/*
 				 * that's weird who triggered this?
 				 * just clear it
 				 */
 				dev_info(dev, "unexpected MSI\n");
+				afi_writel(pcie, BIT(index % 32), AFI_MSI_VEC(index));
 			}
 
 			/* see if there's any more pending in this vector */
-			reg = afi_readl(pcie, AFI_MSI_VEC0 + i * 4);
-
-			processed++;
+			reg = afi_readl(pcie, AFI_MSI_VEC(i));
 		}
 	}
 
-	return processed > 0 ? IRQ_HANDLED : IRQ_NONE;
+	chained_irq_exit(chip, desc);
 }
 
-static int tegra_msi_setup_irq(struct msi_controller *chip,
-			       struct pci_dev *pdev, struct msi_desc *desc)
+static void tegra_msi_top_irq_ack(struct irq_data *d)
 {
-	struct tegra_msi *msi = to_tegra_msi(chip);
-	struct msi_msg msg;
-	unsigned int irq;
-	int hwirq;
+	irq_chip_ack_parent(d);
+}
 
-	hwirq = tegra_msi_alloc(msi);
-	if (hwirq < 0)
-		return hwirq;
+static void tegra_msi_top_irq_mask(struct irq_data *d)
+{
+	pci_msi_mask_irq(d);
+	irq_chip_mask_parent(d);
+}
 
-	irq = irq_create_mapping(msi->domain, hwirq);
-	if (!irq) {
-		tegra_msi_free(msi, hwirq);
-		return -EINVAL;
-	}
+static void tegra_msi_top_irq_unmask(struct irq_data *d)
+{
+	pci_msi_unmask_irq(d);
+	irq_chip_unmask_parent(d);
+}
+
+static struct irq_chip tegra_msi_top_chip = {
+	.name		= "Tegra PCIe MSI",
+	.irq_ack	= tegra_msi_top_irq_ack,
+	.irq_mask	= tegra_msi_top_irq_mask,
+	.irq_unmask	= tegra_msi_top_irq_unmask,
+};
 
-	irq_set_msi_desc(irq, desc);
+static void tegra_msi_irq_ack(struct irq_data *d)
+{
+	struct tegra_msi *msi = irq_data_get_irq_chip_data(d);
+	struct tegra_pcie *pcie = msi_to_pcie(msi);
+	unsigned int index = d->hwirq / 32;
 
-	msg.address_lo = lower_32_bits(msi->phys);
-	msg.address_hi = upper_32_bits(msi->phys);
-	msg.data = hwirq;
+	/* clear the interrupt */
+	afi_writel(pcie, BIT(d->hwirq % 32), AFI_MSI_VEC(index));
+}
 
-	pci_write_msi_msg(irq, &msg);
+static void tegra_msi_irq_mask(struct irq_data *d)
+{
+	struct tegra_msi *msi = irq_data_get_irq_chip_data(d);
+	struct tegra_pcie *pcie = msi_to_pcie(msi);
+	unsigned int index = d->hwirq / 32;
+	unsigned long flags;
+	u32 value;
 
-	return 0;
+	spin_lock_irqsave(&msi->mask_lock, flags);
+	value = afi_readl(pcie, AFI_MSI_EN_VEC(index));
+	value &= ~BIT(d->hwirq % 32);
+	afi_writel(pcie, value, AFI_MSI_EN_VEC(index));
+	spin_unlock_irqrestore(&msi->mask_lock, flags);
 }
 
-static void tegra_msi_teardown_irq(struct msi_controller *chip,
-				   unsigned int irq)
+static void tegra_msi_irq_unmask(struct irq_data *d)
 {
-	struct tegra_msi *msi = to_tegra_msi(chip);
-	struct irq_data *d = irq_get_irq_data(irq);
-	irq_hw_number_t hwirq = irqd_to_hwirq(d);
+	struct tegra_msi *msi = irq_data_get_irq_chip_data(d);
+	struct tegra_pcie *pcie = msi_to_pcie(msi);
+	unsigned int index = d->hwirq / 32;
+	unsigned long flags;
+	u32 value;
 
-	irq_dispose_mapping(irq);
-	tegra_msi_free(msi, hwirq);
+	spin_lock_irqsave(&msi->mask_lock, flags);
+	value = afi_readl(pcie, AFI_MSI_EN_VEC(index));
+	value |= BIT(d->hwirq % 32);
+	afi_writel(pcie, value, AFI_MSI_EN_VEC(index));
+	spin_unlock_irqrestore(&msi->mask_lock, flags);
 }
 
-static struct irq_chip tegra_msi_irq_chip = {
-	.name = "Tegra PCIe MSI",
-	.irq_enable = pci_msi_unmask_irq,
-	.irq_disable = pci_msi_mask_irq,
-	.irq_mask = pci_msi_mask_irq,
-	.irq_unmask = pci_msi_unmask_irq,
+static int tegra_msi_set_affinity(struct irq_data *d, const struct cpumask *mask, bool force)
+{
+	return -EINVAL;
+}
+
+static void tegra_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
+{
+	struct tegra_msi *msi = irq_data_get_irq_chip_data(data);
+
+	msg->address_lo = lower_32_bits(msi->phys);
+	msg->address_hi = upper_32_bits(msi->phys);
+	msg->data = data->hwirq;
+}
+
+static struct irq_chip tegra_msi_bottom_chip = {
+	.name			= "Tegra MSI",
+	.irq_ack		= tegra_msi_irq_ack,
+	.irq_mask		= tegra_msi_irq_mask,
+	.irq_unmask		= tegra_msi_irq_unmask,
+	.irq_set_affinity 	= tegra_msi_set_affinity,
+	.irq_compose_msi_msg	= tegra_compose_msi_msg,
 };
 
-static int tegra_msi_map(struct irq_domain *domain, unsigned int irq,
-			 irq_hw_number_t hwirq)
+static int tegra_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
+				  unsigned int nr_irqs, void *args)
 {
-	irq_set_chip_and_handler(irq, &tegra_msi_irq_chip, handle_simple_irq);
-	irq_set_chip_data(irq, domain->host_data);
+	struct tegra_msi *msi = domain->host_data;
+	unsigned int i;
+	int hwirq;
+
+	mutex_lock(&msi->map_lock);
+
+	hwirq = bitmap_find_free_region(msi->used, INT_PCI_MSI_NR, order_base_2(nr_irqs));
+
+	mutex_unlock(&msi->map_lock);
+
+	if (hwirq < 0)
+		return -ENOSPC;
+
+	for (i = 0; i < nr_irqs; i++)
+		irq_domain_set_info(domain, virq + i, hwirq + i,
+				    &tegra_msi_bottom_chip, domain->host_data,
+				    handle_edge_irq, NULL, NULL);
 
 	tegra_cpuidle_pcie_irqs_in_use();
 
 	return 0;
 }
 
-static const struct irq_domain_ops msi_domain_ops = {
-	.map = tegra_msi_map,
+static void tegra_msi_domain_free(struct irq_domain *domain, unsigned int virq,
+				  unsigned int nr_irqs)
+{
+	struct irq_data *d = irq_domain_get_irq_data(domain, virq);
+	struct tegra_msi *msi = domain->host_data;
+
+	mutex_lock(&msi->map_lock);
+
+	bitmap_release_region(msi->used, d->hwirq, order_base_2(nr_irqs));
+
+	mutex_unlock(&msi->map_lock);
+}
+
+static const struct irq_domain_ops tegra_msi_domain_ops = {
+	.alloc = tegra_msi_domain_alloc,
+	.free = tegra_msi_domain_free,
+};
+
+static struct msi_domain_info tegra_msi_info = {
+	.flags	= (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
+		   MSI_FLAG_PCI_MSIX),
+	.chip	= &tegra_msi_top_chip,
 };
 
+static int tegra_allocate_domains(struct tegra_msi *msi)
+{
+	struct tegra_pcie *pcie = msi_to_pcie(msi);
+	struct fwnode_handle *fwnode = dev_fwnode(pcie->dev);
+	struct irq_domain *parent;
+
+	parent = irq_domain_create_linear(fwnode, INT_PCI_MSI_NR,
+					  &tegra_msi_domain_ops, msi);
+	if (!parent) {
+		dev_err(pcie->dev, "failed to create IRQ domain\n");
+		return -ENOMEM;
+	}
+	irq_domain_update_bus_token(parent, DOMAIN_BUS_NEXUS);
+
+	msi->domain = pci_msi_create_irq_domain(fwnode, &tegra_msi_info, parent);
+	if (!msi->domain) {
+		dev_err(pcie->dev, "failed to create MSI domain\n");
+		irq_domain_remove(parent);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static void tegra_free_domains(struct tegra_msi *msi)
+{
+	struct irq_domain *parent = msi->domain->parent;
+
+	irq_domain_remove(msi->domain);
+	irq_domain_remove(parent);
+}
+
 static int tegra_pcie_msi_setup(struct tegra_pcie *pcie)
 {
-	struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
 	struct platform_device *pdev = to_platform_device(pcie->dev);
 	struct tegra_msi *msi = &pcie->msi;
 	struct device *dev = pcie->dev;
 	int err;
 
-	mutex_init(&msi->lock);
-
-	msi->chip.dev = dev;
-	msi->chip.setup_irq = tegra_msi_setup_irq;
-	msi->chip.teardown_irq = tegra_msi_teardown_irq;
+	mutex_init(&msi->map_lock);
+	spin_lock_init(&msi->mask_lock);
 
-	msi->domain = irq_domain_add_linear(dev->of_node, INT_PCI_MSI_NR,
-					    &msi_domain_ops, &msi->chip);
-	if (!msi->domain) {
-		dev_err(dev, "failed to create IRQ domain\n");
-		return -ENOMEM;
+	if (IS_ENABLED(CONFIG_PCI_MSI)) {
+		err = tegra_allocate_domains(msi);
+		if (err)
+			return err;
 	}
 
 	err = platform_get_irq_byname(pdev, "msi");
@@ -1714,12 +1766,7 @@ static int tegra_pcie_msi_setup(struct tegra_pcie *pcie)
 
 	msi->irq = err;
 
-	err = request_irq(msi->irq, tegra_pcie_msi_irq, IRQF_NO_THREAD,
-			  tegra_msi_irq_chip.name, pcie);
-	if (err < 0) {
-		dev_err(dev, "failed to request IRQ: %d\n", err);
-		goto free_irq_domain;
-	}
+	irq_set_chained_handler_and_data(msi->irq, tegra_pcie_msi_irq, pcie);
 
 	/* Though the PCIe controller can address >32-bit address space, to
 	 * facilitate endpoints that support only 32-bit MSI target address,
@@ -1740,14 +1787,14 @@ static int tegra_pcie_msi_setup(struct tegra_pcie *pcie)
 		goto free_irq;
 	}
 
-	host->msi = &msi->chip;
-
 	return 0;
 
 free_irq:
-	free_irq(msi->irq, pcie);
+	irq_set_chained_handler_and_data(msi->irq, NULL, NULL);
 free_irq_domain:
-	irq_domain_remove(msi->domain);
+	if (IS_ENABLED(CONFIG_PCI_MSI))
+		tegra_free_domains(msi);
+
 	return err;
 }
 
@@ -1755,22 +1802,18 @@ static void tegra_pcie_enable_msi(struct tegra_pcie *pcie)
 {
 	const struct tegra_pcie_soc *soc = pcie->soc;
 	struct tegra_msi *msi = &pcie->msi;
-	u32 reg;
+	u32 reg, msi_state[INT_PCI_MSI_NR / 32];
+	int i;
 
 	afi_writel(pcie, msi->phys >> soc->msi_base_shift, AFI_MSI_FPCI_BAR_ST);
 	afi_writel(pcie, msi->phys, AFI_MSI_AXI_BAR_ST);
 	/* this register is in 4K increments */
 	afi_writel(pcie, 1, AFI_MSI_BAR_SZ);
 
-	/* enable all MSI vectors */
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC0);
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC1);
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC2);
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC3);
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC4);
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC5);
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC6);
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC7);
+	/* Restore the MSI allocation state */
+	bitmap_to_arr32(msi_state, msi->used, INT_PCI_MSI_NR);
+	for (i = 0; i < ARRAY_SIZE(msi_state); i++)
+		afi_writel(pcie, msi_state[i], AFI_MSI_EN_VEC(i));
 
 	/* and unmask the MSI interrupt */
 	reg = afi_readl(pcie, AFI_INTR_MASK);
@@ -1786,16 +1829,16 @@ static void tegra_pcie_msi_teardown(struct tegra_pcie *pcie)
 	dma_free_attrs(pcie->dev, PAGE_SIZE, msi->virt, msi->phys,
 		       DMA_ATTR_NO_KERNEL_MAPPING);
 
-	if (msi->irq > 0)
-		free_irq(msi->irq, pcie);
-
 	for (i = 0; i < INT_PCI_MSI_NR; i++) {
 		irq = irq_find_mapping(msi->domain, i);
 		if (irq > 0)
-			irq_dispose_mapping(irq);
+			irq_domain_free_irqs(irq, 1);
 	}
 
-	irq_domain_remove(msi->domain);
+	irq_set_chained_handler_and_data(msi->irq, NULL, NULL);
+
+	if (IS_ENABLED(CONFIG_PCI_MSI))
+		tegra_free_domains(msi);
 }
 
 static int tegra_pcie_disable_msi(struct tegra_pcie *pcie)
@@ -1807,16 +1850,6 @@ static int tegra_pcie_disable_msi(struct tegra_pcie *pcie)
 	value &= ~AFI_INTR_MASK_MSI_MASK;
 	afi_writel(pcie, value, AFI_INTR_MASK);
 
-	/* disable all MSI vectors */
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC0);
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC1);
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC2);
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC3);
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC4);
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC5);
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC6);
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC7);
-
 	return 0;
 }
 
-- 
cgit v1.2.3


From 93cd1bb4862d71298ad5ec86991eac0a119d024d Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Tue, 30 Mar 2021 16:11:33 +0100
Subject: PCI: rcar: Don't allocate extra memory for the MSI capture address

A long cargo-culted behaviour of PCI drivers is to allocate memory
to obtain an address that is fed to the controller as the MSI
capture address (i.e. the MSI doorbell).

But there is no actual requirement for this address to be RAM.
All it needs to be is a suitable aligned address that will
*not* be DMA'd to.

Since the rcar platform already has a requirement that this
address should be in the first 4GB of the physical address space,
use the controller's own base address as the capture address.

Link: https://lore.kernel.org/r/20210330151145.997953-3-maz@kernel.org
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
 drivers/pci/controller/pcie-rcar-host.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controller/pcie-rcar-host.c
index a728e8f9ad3c..ce952403e22c 100644
--- a/drivers/pci/controller/pcie-rcar-host.c
+++ b/drivers/pci/controller/pcie-rcar-host.c
@@ -36,7 +36,6 @@ struct rcar_msi {
 	DECLARE_BITMAP(used, INT_PCI_MSI_NR);
 	struct irq_domain *domain;
 	struct msi_controller chip;
-	unsigned long pages;
 	struct mutex lock;
 	int irq1;
 	int irq2;
@@ -680,14 +679,15 @@ static void rcar_pcie_unmap_msi(struct rcar_pcie_host *host)
 static void rcar_pcie_hw_enable_msi(struct rcar_pcie_host *host)
 {
 	struct rcar_pcie *pcie = &host->pcie;
-	struct rcar_msi *msi = &host->msi;
-	unsigned long base;
+	struct device *dev = pcie->dev;
+	struct resource res;
 
-	/* setup MSI data target */
-	base = virt_to_phys((void *)msi->pages);
+	if (WARN_ON(of_address_to_resource(dev->of_node, 0, &res)))
+		return;
 
-	rcar_pci_write_reg(pcie, lower_32_bits(base) | MSIFE, PCIEMSIALR);
-	rcar_pci_write_reg(pcie, upper_32_bits(base), PCIEMSIAUR);
+	/* setup MSI data target */
+	rcar_pci_write_reg(pcie, lower_32_bits(res.start) | MSIFE, PCIEMSIALR);
+	rcar_pci_write_reg(pcie, upper_32_bits(res.start), PCIEMSIAUR);
 
 	/* enable all MSI interrupts */
 	rcar_pci_write_reg(pcie, 0xffffffff, PCIEMSIIER);
@@ -735,7 +735,6 @@ static int rcar_pcie_enable_msi(struct rcar_pcie_host *host)
 	}
 
 	/* setup MSI data target */
-	msi->pages = __get_free_pages(GFP_KERNEL | GFP_DMA32, 0);
 	rcar_pcie_hw_enable_msi(host);
 
 	return 0;
@@ -748,7 +747,6 @@ err:
 static void rcar_pcie_teardown_msi(struct rcar_pcie_host *host)
 {
 	struct rcar_pcie *pcie = &host->pcie;
-	struct rcar_msi *msi = &host->msi;
 
 	/* Disable all MSI interrupts */
 	rcar_pci_write_reg(pcie, 0, PCIEMSIIER);
@@ -756,8 +754,6 @@ static void rcar_pcie_teardown_msi(struct rcar_pcie_host *host)
 	/* Disable address decoding of the MSI interrupt, MSIFE */
 	rcar_pci_write_reg(pcie, 0, PCIEMSIALR);
 
-	free_pages(msi->pages, 0);
-
 	rcar_pcie_unmap_msi(host);
 }
 
-- 
cgit v1.2.3


From 83ed8d4fa656d37d17bb83203485e3f7a2360e7a Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Tue, 30 Mar 2021 16:11:34 +0100
Subject: PCI: rcar: Convert to MSI domains

In anticipation of the removal of the msi_controller structure, convert
the Rcar host controller driver to MSI domains.

We end-up with the usual two domain structure, the top one being a
generic PCI/MSI domain, the bottom one being Rcar-specific and handling
the actual HW interrupt allocation.

Link: https://lore.kernel.org/r/20210330151145.997953-4-maz@kernel.org
Tested-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
[lorenzo.pieralisi@arm.com: merged fix https://lore.kernel.org/linux-pci/87y2e2p9wk.wl-maz@kernel.org]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/controller/Kconfig          |   1 -
 drivers/pci/controller/pcie-rcar-host.c | 351 +++++++++++++++-----------------
 2 files changed, 169 insertions(+), 183 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index be8f9ff512a0..5cc07d28a3a0 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -58,7 +58,6 @@ config PCIE_RCAR_HOST
 	bool "Renesas R-Car PCIe host controller"
 	depends on ARCH_RENESAS || COMPILE_TEST
 	depends on PCI_MSI_IRQ_DOMAIN
-	select PCI_MSI_ARCH_FALLBACKS
 	help
 	  Say Y here if you want PCIe controller support on R-Car SoCs in host
 	  mode.
diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controller/pcie-rcar-host.c
index ce952403e22c..765cf2b45e24 100644
--- a/drivers/pci/controller/pcie-rcar-host.c
+++ b/drivers/pci/controller/pcie-rcar-host.c
@@ -35,17 +35,12 @@
 struct rcar_msi {
 	DECLARE_BITMAP(used, INT_PCI_MSI_NR);
 	struct irq_domain *domain;
-	struct msi_controller chip;
-	struct mutex lock;
+	struct mutex map_lock;
+	spinlock_t mask_lock;
 	int irq1;
 	int irq2;
 };
 
-static inline struct rcar_msi *to_rcar_msi(struct msi_controller *chip)
-{
-	return container_of(chip, struct rcar_msi, chip);
-}
-
 /* Structure representing the PCIe interface */
 struct rcar_pcie_host {
 	struct rcar_pcie	pcie;
@@ -55,6 +50,11 @@ struct rcar_pcie_host {
 	int			(*phy_init_fn)(struct rcar_pcie_host *host);
 };
 
+static struct rcar_pcie_host *msi_to_host(struct rcar_msi *msi)
+{
+	return container_of(msi, struct rcar_pcie_host, msi);
+}
+
 static u32 rcar_read_conf(struct rcar_pcie *pcie, int where)
 {
 	unsigned int shift = BITS_PER_BYTE * (where & 3);
@@ -291,8 +291,6 @@ static int rcar_pcie_enable(struct rcar_pcie_host *host)
 
 	bridge->sysdata = host;
 	bridge->ops = &rcar_pcie_ops;
-	if (IS_ENABLED(CONFIG_PCI_MSI))
-		bridge->msi = &host->msi.chip;
 
 	return pci_host_probe(bridge);
 }
@@ -472,42 +470,6 @@ static int rcar_pcie_phy_init_gen3(struct rcar_pcie_host *host)
 	return err;
 }
 
-static int rcar_msi_alloc(struct rcar_msi *chip)
-{
-	int msi;
-
-	mutex_lock(&chip->lock);
-
-	msi = find_first_zero_bit(chip->used, INT_PCI_MSI_NR);
-	if (msi < INT_PCI_MSI_NR)
-		set_bit(msi, chip->used);
-	else
-		msi = -ENOSPC;
-
-	mutex_unlock(&chip->lock);
-
-	return msi;
-}
-
-static int rcar_msi_alloc_region(struct rcar_msi *chip, int no_irqs)
-{
-	int msi;
-
-	mutex_lock(&chip->lock);
-	msi = bitmap_find_free_region(chip->used, INT_PCI_MSI_NR,
-				      order_base_2(no_irqs));
-	mutex_unlock(&chip->lock);
-
-	return msi;
-}
-
-static void rcar_msi_free(struct rcar_msi *chip, unsigned long irq)
-{
-	mutex_lock(&chip->lock);
-	clear_bit(irq, chip->used);
-	mutex_unlock(&chip->lock);
-}
-
 static irqreturn_t rcar_pcie_msi_irq(int irq, void *data)
 {
 	struct rcar_pcie_host *host = data;
@@ -526,18 +488,13 @@ static irqreturn_t rcar_pcie_msi_irq(int irq, void *data)
 		unsigned int index = find_first_bit(&reg, 32);
 		unsigned int msi_irq;
 
-		/* clear the interrupt */
-		rcar_pci_write_reg(pcie, 1 << index, PCIEMSIFR);
-
-		msi_irq = irq_find_mapping(msi->domain, index);
+		msi_irq = irq_find_mapping(msi->domain->parent, index);
 		if (msi_irq) {
-			if (test_bit(index, msi->used))
-				generic_handle_irq(msi_irq);
-			else
-				dev_info(dev, "unhandled MSI\n");
+			generic_handle_irq(msi_irq);
 		} else {
 			/* Unknown MSI, just clear it */
 			dev_dbg(dev, "unexpected MSI\n");
+			rcar_pci_write_reg(pcie, BIT(index), PCIEMSIFR);
 		}
 
 		/* see if there's any more pending in this vector */
@@ -547,150 +504,169 @@ static irqreturn_t rcar_pcie_msi_irq(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static int rcar_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
-			      struct msi_desc *desc)
+static void rcar_msi_top_irq_ack(struct irq_data *d)
 {
-	struct rcar_msi *msi = to_rcar_msi(chip);
-	struct rcar_pcie_host *host = container_of(chip, struct rcar_pcie_host,
-						   msi.chip);
-	struct rcar_pcie *pcie = &host->pcie;
-	struct msi_msg msg;
-	unsigned int irq;
-	int hwirq;
+	irq_chip_ack_parent(d);
+}
 
-	hwirq = rcar_msi_alloc(msi);
-	if (hwirq < 0)
-		return hwirq;
+static void rcar_msi_top_irq_mask(struct irq_data *d)
+{
+	pci_msi_mask_irq(d);
+	irq_chip_mask_parent(d);
+}
 
-	irq = irq_find_mapping(msi->domain, hwirq);
-	if (!irq) {
-		rcar_msi_free(msi, hwirq);
-		return -EINVAL;
-	}
+static void rcar_msi_top_irq_unmask(struct irq_data *d)
+{
+	pci_msi_unmask_irq(d);
+	irq_chip_unmask_parent(d);
+}
 
-	irq_set_msi_desc(irq, desc);
+static struct irq_chip rcar_msi_top_chip = {
+	.name		= "PCIe MSI",
+	.irq_ack	= rcar_msi_top_irq_ack,
+	.irq_mask	= rcar_msi_top_irq_mask,
+	.irq_unmask	= rcar_msi_top_irq_unmask,
+};
 
-	msg.address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE;
-	msg.address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR);
-	msg.data = hwirq;
+static void rcar_msi_irq_ack(struct irq_data *d)
+{
+	struct rcar_msi *msi = irq_data_get_irq_chip_data(d);
+	struct rcar_pcie *pcie = &msi_to_host(msi)->pcie;
 
-	pci_write_msi_msg(irq, &msg);
+	/* clear the interrupt */
+	rcar_pci_write_reg(pcie, BIT(d->hwirq), PCIEMSIFR);
+}
 
-	return 0;
+static void rcar_msi_irq_mask(struct irq_data *d)
+{
+	struct rcar_msi *msi = irq_data_get_irq_chip_data(d);
+	struct rcar_pcie *pcie = &msi_to_host(msi)->pcie;
+	unsigned long flags;
+	u32 value;
+
+	spin_lock_irqsave(&msi->mask_lock, flags);
+	value = rcar_pci_read_reg(pcie, PCIEMSIIER);
+	value &= ~BIT(d->hwirq);
+	rcar_pci_write_reg(pcie, value, PCIEMSIIER);
+	spin_unlock_irqrestore(&msi->mask_lock, flags);
 }
 
-static int rcar_msi_setup_irqs(struct msi_controller *chip,
-			       struct pci_dev *pdev, int nvec, int type)
+static void rcar_msi_irq_unmask(struct irq_data *d)
 {
-	struct rcar_msi *msi = to_rcar_msi(chip);
-	struct rcar_pcie_host *host = container_of(chip, struct rcar_pcie_host,
-						   msi.chip);
-	struct rcar_pcie *pcie = &host->pcie;
-	struct msi_desc *desc;
-	struct msi_msg msg;
-	unsigned int irq;
-	int hwirq;
-	int i;
+	struct rcar_msi *msi = irq_data_get_irq_chip_data(d);
+	struct rcar_pcie *pcie = &msi_to_host(msi)->pcie;
+	unsigned long flags;
+	u32 value;
+
+	spin_lock_irqsave(&msi->mask_lock, flags);
+	value = rcar_pci_read_reg(pcie, PCIEMSIIER);
+	value |= BIT(d->hwirq);
+	rcar_pci_write_reg(pcie, value, PCIEMSIIER);
+	spin_unlock_irqrestore(&msi->mask_lock, flags);
+}
 
-	/* MSI-X interrupts are not supported */
-	if (type == PCI_CAP_ID_MSIX)
-		return -EINVAL;
+static int rcar_msi_set_affinity(struct irq_data *d, const struct cpumask *mask, bool force)
+{
+	return -EINVAL;
+}
 
-	WARN_ON(!list_is_singular(&pdev->dev.msi_list));
-	desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list);
+static void rcar_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
+{
+	struct rcar_msi *msi = irq_data_get_irq_chip_data(data);
+	struct rcar_pcie *pcie = &msi_to_host(msi)->pcie;
 
-	hwirq = rcar_msi_alloc_region(msi, nvec);
-	if (hwirq < 0)
-		return -ENOSPC;
+	msg->address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE;
+	msg->address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR);
+	msg->data = data->hwirq;
+}
 
-	irq = irq_find_mapping(msi->domain, hwirq);
-	if (!irq)
-		return -ENOSPC;
+static struct irq_chip rcar_msi_bottom_chip = {
+	.name			= "Rcar MSI",
+	.irq_ack		= rcar_msi_irq_ack,
+	.irq_mask		= rcar_msi_irq_mask,
+	.irq_unmask		= rcar_msi_irq_unmask,
+	.irq_set_affinity 	= rcar_msi_set_affinity,
+	.irq_compose_msi_msg	= rcar_compose_msi_msg,
+};
 
-	for (i = 0; i < nvec; i++) {
-		/*
-		 * irq_create_mapping() called from rcar_pcie_probe() pre-
-		 * allocates descs,  so there is no need to allocate descs here.
-		 * We can therefore assume that if irq_find_mapping() above
-		 * returns non-zero, then the descs are also successfully
-		 * allocated.
-		 */
-		if (irq_set_msi_desc_off(irq, i, desc)) {
-			/* TODO: clear */
-			return -EINVAL;
-		}
-	}
+static int rcar_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
+				  unsigned int nr_irqs, void *args)
+{
+	struct rcar_msi *msi = domain->host_data;
+	unsigned int i;
+	int hwirq;
+
+	mutex_lock(&msi->map_lock);
 
-	desc->nvec_used = nvec;
-	desc->msi_attrib.multiple = order_base_2(nvec);
+	hwirq = bitmap_find_free_region(msi->used, INT_PCI_MSI_NR, order_base_2(nr_irqs));
 
-	msg.address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE;
-	msg.address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR);
-	msg.data = hwirq;
+	mutex_unlock(&msi->map_lock);
+
+	if (hwirq < 0)
+		return -ENOSPC;
 
-	pci_write_msi_msg(irq, &msg);
+	for (i = 0; i < nr_irqs; i++)
+		irq_domain_set_info(domain, virq + i, hwirq + i,
+				    &rcar_msi_bottom_chip, domain->host_data,
+				    handle_edge_irq, NULL, NULL);
 
 	return 0;
 }
 
-static void rcar_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
+static void rcar_msi_domain_free(struct irq_domain *domain, unsigned int virq,
+				  unsigned int nr_irqs)
 {
-	struct rcar_msi *msi = to_rcar_msi(chip);
-	struct irq_data *d = irq_get_irq_data(irq);
+	struct irq_data *d = irq_domain_get_irq_data(domain, virq);
+	struct rcar_msi *msi = domain->host_data;
 
-	rcar_msi_free(msi, d->hwirq);
-}
-
-static struct irq_chip rcar_msi_irq_chip = {
-	.name = "R-Car PCIe MSI",
-	.irq_enable = pci_msi_unmask_irq,
-	.irq_disable = pci_msi_mask_irq,
-	.irq_mask = pci_msi_mask_irq,
-	.irq_unmask = pci_msi_unmask_irq,
-};
+	mutex_lock(&msi->map_lock);
 
-static int rcar_msi_map(struct irq_domain *domain, unsigned int irq,
-			irq_hw_number_t hwirq)
-{
-	irq_set_chip_and_handler(irq, &rcar_msi_irq_chip, handle_simple_irq);
-	irq_set_chip_data(irq, domain->host_data);
+	bitmap_release_region(msi->used, d->hwirq, order_base_2(nr_irqs));
 
-	return 0;
+	mutex_unlock(&msi->map_lock);
 }
 
-static const struct irq_domain_ops msi_domain_ops = {
-	.map = rcar_msi_map,
+static const struct irq_domain_ops rcar_msi_domain_ops = {
+	.alloc	= rcar_msi_domain_alloc,
+	.free	= rcar_msi_domain_free,
+};
+
+static struct msi_domain_info rcar_msi_info = {
+	.flags	= (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
+		   MSI_FLAG_MULTI_PCI_MSI),
+	.chip	= &rcar_msi_top_chip,
 };
 
-static void rcar_pcie_unmap_msi(struct rcar_pcie_host *host)
+static int rcar_allocate_domains(struct rcar_msi *msi)
 {
-	struct rcar_msi *msi = &host->msi;
-	int i, irq;
+	struct rcar_pcie *pcie = &msi_to_host(msi)->pcie;
+	struct fwnode_handle *fwnode = dev_fwnode(pcie->dev);
+	struct irq_domain *parent;
+
+	parent = irq_domain_create_linear(fwnode, INT_PCI_MSI_NR,
+					  &rcar_msi_domain_ops, msi);
+	if (!parent) {
+		dev_err(pcie->dev, "failed to create IRQ domain\n");
+		return -ENOMEM;
+	}
+	irq_domain_update_bus_token(parent, DOMAIN_BUS_NEXUS);
 
-	for (i = 0; i < INT_PCI_MSI_NR; i++) {
-		irq = irq_find_mapping(msi->domain, i);
-		if (irq > 0)
-			irq_dispose_mapping(irq);
+	msi->domain = pci_msi_create_irq_domain(fwnode, &rcar_msi_info, parent);
+	if (!msi->domain) {
+		dev_err(pcie->dev, "failed to create MSI domain\n");
+		irq_domain_remove(parent);
+		return -ENOMEM;
 	}
 
-	irq_domain_remove(msi->domain);
+	return 0;
 }
 
-static void rcar_pcie_hw_enable_msi(struct rcar_pcie_host *host)
+static void rcar_free_domains(struct rcar_msi *msi)
 {
-	struct rcar_pcie *pcie = &host->pcie;
-	struct device *dev = pcie->dev;
-	struct resource res;
+	struct irq_domain *parent = msi->domain->parent;
 
-	if (WARN_ON(of_address_to_resource(dev->of_node, 0, &res)))
-		return;
-
-	/* setup MSI data target */
-	rcar_pci_write_reg(pcie, lower_32_bits(res.start) | MSIFE, PCIEMSIALR);
-	rcar_pci_write_reg(pcie, upper_32_bits(res.start), PCIEMSIAUR);
-
-	/* enable all MSI interrupts */
-	rcar_pci_write_reg(pcie, 0xffffffff, PCIEMSIIER);
+	irq_domain_remove(msi->domain);
+	irq_domain_remove(parent);
 }
 
 static int rcar_pcie_enable_msi(struct rcar_pcie_host *host)
@@ -698,29 +674,24 @@ static int rcar_pcie_enable_msi(struct rcar_pcie_host *host)
 	struct rcar_pcie *pcie = &host->pcie;
 	struct device *dev = pcie->dev;
 	struct rcar_msi *msi = &host->msi;
-	int err, i;
-
-	mutex_init(&msi->lock);
+	struct resource res;
+	int err;
 
-	msi->chip.dev = dev;
-	msi->chip.setup_irq = rcar_msi_setup_irq;
-	msi->chip.setup_irqs = rcar_msi_setup_irqs;
-	msi->chip.teardown_irq = rcar_msi_teardown_irq;
+	mutex_init(&msi->map_lock);
+	spin_lock_init(&msi->mask_lock);
 
-	msi->domain = irq_domain_add_linear(dev->of_node, INT_PCI_MSI_NR,
-					    &msi_domain_ops, &msi->chip);
-	if (!msi->domain) {
-		dev_err(dev, "failed to create IRQ domain\n");
-		return -ENOMEM;
-	}
+	err = of_address_to_resource(dev->of_node, 0, &res);
+	if (err)
+		return err;
 
-	for (i = 0; i < INT_PCI_MSI_NR; i++)
-		irq_create_mapping(msi->domain, i);
+	err = rcar_allocate_domains(msi);
+	if (err)
+		return err;
 
 	/* Two irqs are for MSI, but they are also used for non-MSI irqs */
 	err = devm_request_irq(dev, msi->irq1, rcar_pcie_msi_irq,
 			       IRQF_SHARED | IRQF_NO_THREAD,
-			       rcar_msi_irq_chip.name, host);
+			       rcar_msi_bottom_chip.name, host);
 	if (err < 0) {
 		dev_err(dev, "failed to request IRQ: %d\n", err);
 		goto err;
@@ -728,19 +699,26 @@ static int rcar_pcie_enable_msi(struct rcar_pcie_host *host)
 
 	err = devm_request_irq(dev, msi->irq2, rcar_pcie_msi_irq,
 			       IRQF_SHARED | IRQF_NO_THREAD,
-			       rcar_msi_irq_chip.name, host);
+			       rcar_msi_bottom_chip.name, host);
 	if (err < 0) {
 		dev_err(dev, "failed to request IRQ: %d\n", err);
 		goto err;
 	}
 
-	/* setup MSI data target */
-	rcar_pcie_hw_enable_msi(host);
+	/* disable all MSIs */
+	rcar_pci_write_reg(pcie, 0, PCIEMSIIER);
+
+	/*
+	 * Setup MSI data target using RC base address address, which
+	 * is guaranteed to be in the low 32bit range on any RCar HW.
+	 */
+	rcar_pci_write_reg(pcie, lower_32_bits(res.start) | MSIFE, PCIEMSIALR);
+	rcar_pci_write_reg(pcie, upper_32_bits(res.start), PCIEMSIAUR);
 
 	return 0;
 
 err:
-	rcar_pcie_unmap_msi(host);
+	rcar_free_domains(msi);
 	return err;
 }
 
@@ -754,7 +732,7 @@ static void rcar_pcie_teardown_msi(struct rcar_pcie_host *host)
 	/* Disable address decoding of the MSI interrupt, MSIFE */
 	rcar_pci_write_reg(pcie, 0, PCIEMSIALR);
 
-	rcar_pcie_unmap_msi(host);
+	rcar_free_domains(&host->msi);
 }
 
 static int rcar_pcie_get_resources(struct rcar_pcie_host *host)
@@ -1007,8 +985,17 @@ static int __maybe_unused rcar_pcie_resume(struct device *dev)
 	dev_info(dev, "PCIe x%d: link up\n", (data >> 20) & 0x3f);
 
 	/* Enable MSI */
-	if (IS_ENABLED(CONFIG_PCI_MSI))
-		rcar_pcie_hw_enable_msi(host);
+	if (IS_ENABLED(CONFIG_PCI_MSI)) {
+		struct resource res;
+		u32 val;
+
+		of_address_to_resource(dev->of_node, 0, &res);
+		rcar_pci_write_reg(pcie, upper_32_bits(res.start), PCIEMSIAUR);
+		rcar_pci_write_reg(pcie, lower_32_bits(res.start) | MSIFE, PCIEMSIALR);
+
+		bitmap_to_arr32(&val, host->msi.used, INT_PCI_MSI_NR);
+		rcar_pci_write_reg(pcie, val, PCIEMSIIER);
+	}
 
 	rcar_pcie_hw_enable(host);
 
-- 
cgit v1.2.3


From 161260e7f7bc58d6a0972eb41a6072e82d0b58a5 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Tue, 30 Mar 2021 16:11:35 +0100
Subject: PCI: xilinx: Don't allocate extra memory for the MSI capture address

A long cargo-culted behaviour of PCI drivers is to allocate memory
to obtain an address that is fed to the controller as the MSI
capture address (i.e. the MSI doorbell).

But there is no actual requirement for this address to be RAM.
All it needs to be is a suitable aligned address that will
*not* be DMA'd to.

Use the physical address of the 'port' data structure as the MSI
capture address, aligned on a 4K boundary.

Link: https://lore.kernel.org/r/20210330151145.997953-5-maz@kernel.org
Tested-by: Bharat Kumar Gogada <bharatku@xilinx.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
---
 drivers/pci/controller/pcie-xilinx.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pcie-xilinx.c b/drivers/pci/controller/pcie-xilinx.c
index fa5baeb82653..e127a7b6e535 100644
--- a/drivers/pci/controller/pcie-xilinx.c
+++ b/drivers/pci/controller/pcie-xilinx.c
@@ -94,7 +94,6 @@
  * struct xilinx_pcie_port - PCIe port information
  * @reg_base: IO Mapped Register Base
  * @irq: Interrupt number
- * @msi_pages: MSI pages
  * @dev: Device pointer
  * @msi_domain: MSI IRQ domain pointer
  * @leg_domain: Legacy IRQ domain pointer
@@ -103,7 +102,6 @@
 struct xilinx_pcie_port {
 	void __iomem *reg_base;
 	u32 irq;
-	unsigned long msi_pages;
 	struct device *dev;
 	struct irq_domain *msi_domain;
 	struct irq_domain *leg_domain;
@@ -274,10 +272,10 @@ static int xilinx_pcie_msi_setup_irq(struct msi_controller *chip,
 
 	irq_set_msi_desc(irq, desc);
 
-	msg_addr = virt_to_phys((void *)port->msi_pages);
+	msg_addr = ALIGN_DOWN(virt_to_phys(port), SZ_4K);
 
-	msg.address_hi = 0;
-	msg.address_lo = msg_addr;
+	msg.address_hi = upper_32_bits(msg_addr);
+	msg.address_lo = lower_32_bits(msg_addr);
 	msg.data = irq;
 
 	pci_write_msi_msg(irq, &msg);
@@ -330,13 +328,9 @@ static int xilinx_pcie_enable_msi(struct xilinx_pcie_port *port)
 {
 	phys_addr_t msg_addr;
 
-	port->msi_pages = __get_free_pages(GFP_KERNEL, 0);
-	if (!port->msi_pages)
-		return -ENOMEM;
-
-	msg_addr = virt_to_phys((void *)port->msi_pages);
-	pcie_write(port, 0x0, XILINX_PCIE_REG_MSIBASE1);
-	pcie_write(port, msg_addr, XILINX_PCIE_REG_MSIBASE2);
+	msg_addr = ALIGN_DOWN(virt_to_phys(port), SZ_4K);
+	pcie_write(port, upper_32_bits(msg_addr), XILINX_PCIE_REG_MSIBASE1);
+	pcie_write(port, lower_32_bits(msg_addr), XILINX_PCIE_REG_MSIBASE2);
 
 	return 0;
 }
-- 
cgit v1.2.3


From 313b64c3ae52bc8e953319077204cf1d286a8a99 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Tue, 30 Mar 2021 16:11:36 +0100
Subject: PCI: xilinx: Convert to MSI domains

In anticipation of the removal of the msi_controller structure, convert
the ancient xilinx host controller driver to MSI domains.

We end-up with the usual two domain structure, the top one being a
generic PCI/MSI domain, the bottom one being xilinx-specific and handling
the actual HW interrupt allocation.

This allows us to fix some of the most appaling MSI programming, where
the message programmed in the device is the virtual IRQ number instead
of the allocated vector number. The allocator is also made safe with
a mutex. This should allow support for MultiMSI, but I decided not to
even try, since I cannot test it.

Link: https://lore.kernel.org/r/20210330151145.997953-6-maz@kernel.org
Tested-by: Bharat Kumar Gogada <bharatku@xilinx.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/controller/Kconfig       |   2 +-
 drivers/pci/controller/pcie-xilinx.c | 242 +++++++++++++++--------------------
 2 files changed, 106 insertions(+), 138 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index 5cc07d28a3a0..60045f7aafc5 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -86,7 +86,7 @@ config PCI_HOST_GENERIC
 config PCIE_XILINX
 	bool "Xilinx AXI PCIe host bridge support"
 	depends on OF || COMPILE_TEST
-	select PCI_MSI_ARCH_FALLBACKS
+	depends on PCI_MSI_IRQ_DOMAIN
 	help
 	  Say 'Y' here if you want kernel to support the Xilinx AXI PCIe
 	  Host Bridge driver.
diff --git a/drivers/pci/controller/pcie-xilinx.c b/drivers/pci/controller/pcie-xilinx.c
index e127a7b6e535..14001febf59a 100644
--- a/drivers/pci/controller/pcie-xilinx.c
+++ b/drivers/pci/controller/pcie-xilinx.c
@@ -93,23 +93,23 @@
 /**
  * struct xilinx_pcie_port - PCIe port information
  * @reg_base: IO Mapped Register Base
- * @irq: Interrupt number
  * @dev: Device pointer
+ * @msi_map: Bitmap of allocated MSIs
+ * @map_lock: Mutex protecting the MSI allocation
  * @msi_domain: MSI IRQ domain pointer
  * @leg_domain: Legacy IRQ domain pointer
  * @resources: Bus Resources
  */
 struct xilinx_pcie_port {
 	void __iomem *reg_base;
-	u32 irq;
 	struct device *dev;
+	unsigned long msi_map[BITS_TO_LONGS(XILINX_NUM_MSI_IRQS)];
+	struct mutex map_lock;
 	struct irq_domain *msi_domain;
 	struct irq_domain *leg_domain;
 	struct list_head resources;
 };
 
-static DECLARE_BITMAP(msi_irq_in_use, XILINX_NUM_MSI_IRQS);
-
 static inline u32 pcie_read(struct xilinx_pcie_port *port, u32 reg)
 {
 	return readl(port->reg_base + reg);
@@ -194,145 +194,116 @@ static struct pci_ops xilinx_pcie_ops = {
 
 /* MSI functions */
 
-/**
- * xilinx_pcie_destroy_msi - Free MSI number
- * @irq: IRQ to be freed
- */
-static void xilinx_pcie_destroy_msi(unsigned int irq)
+static void xilinx_msi_top_irq_ack(struct irq_data *d)
 {
-	struct msi_desc *msi;
-	struct xilinx_pcie_port *port;
-	struct irq_data *d = irq_get_irq_data(irq);
-	irq_hw_number_t hwirq = irqd_to_hwirq(d);
-
-	if (!test_bit(hwirq, msi_irq_in_use)) {
-		msi = irq_get_msi_desc(irq);
-		port = msi_desc_to_pci_sysdata(msi);
-		dev_err(port->dev, "Trying to free unused MSI#%d\n", irq);
-	} else {
-		clear_bit(hwirq, msi_irq_in_use);
-	}
+	/*
+	 * xilinx_pcie_intr_handler() will have performed the Ack.
+	 * Eventually, this should be fixed and the Ack be moved in
+	 * the respective callbacks for INTx and MSI.
+	 */
 }
 
-/**
- * xilinx_pcie_assign_msi - Allocate MSI number
- *
- * Return: A valid IRQ on success and error value on failure.
- */
-static int xilinx_pcie_assign_msi(void)
-{
-	int pos;
-
-	pos = find_first_zero_bit(msi_irq_in_use, XILINX_NUM_MSI_IRQS);
-	if (pos < XILINX_NUM_MSI_IRQS)
-		set_bit(pos, msi_irq_in_use);
-	else
-		return -ENOSPC;
+static struct irq_chip xilinx_msi_top_chip = {
+	.name		= "PCIe MSI",
+	.irq_ack	= xilinx_msi_top_irq_ack,
+};
 
-	return pos;
+static int xilinx_msi_set_affinity(struct irq_data *d, const struct cpumask *mask, bool force)
+{
+	return -EINVAL;
 }
 
-/**
- * xilinx_msi_teardown_irq - Destroy the MSI
- * @chip: MSI Chip descriptor
- * @irq: MSI IRQ to destroy
- */
-static void xilinx_msi_teardown_irq(struct msi_controller *chip,
-				    unsigned int irq)
+static void xilinx_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
 {
-	xilinx_pcie_destroy_msi(irq);
-	irq_dispose_mapping(irq);
+	struct xilinx_pcie_port *pcie = irq_data_get_irq_chip_data(data);
+	phys_addr_t pa = ALIGN_DOWN(virt_to_phys(pcie), SZ_4K);
+
+	msg->address_lo = lower_32_bits(pa);
+	msg->address_hi = upper_32_bits(pa);
+	msg->data = data->hwirq;
 }
 
-/**
- * xilinx_pcie_msi_setup_irq - Setup MSI request
- * @chip: MSI chip pointer
- * @pdev: PCIe device pointer
- * @desc: MSI descriptor pointer
- *
- * Return: '0' on success and error value on failure
- */
-static int xilinx_pcie_msi_setup_irq(struct msi_controller *chip,
-				     struct pci_dev *pdev,
-				     struct msi_desc *desc)
+static struct irq_chip xilinx_msi_bottom_chip = {
+	.name			= "Xilinx MSI",
+	.irq_set_affinity 	= xilinx_msi_set_affinity,
+	.irq_compose_msi_msg	= xilinx_compose_msi_msg,
+};
+
+static int xilinx_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
+				  unsigned int nr_irqs, void *args)
 {
-	struct xilinx_pcie_port *port = pdev->bus->sysdata;
-	unsigned int irq;
-	int hwirq;
-	struct msi_msg msg;
-	phys_addr_t msg_addr;
+	struct xilinx_pcie_port *port = domain->host_data;
+	int hwirq, i;
+
+	mutex_lock(&port->map_lock);
+
+	hwirq = bitmap_find_free_region(port->msi_map, XILINX_NUM_MSI_IRQS, order_base_2(nr_irqs));
+
+	mutex_unlock(&port->map_lock);
 
-	hwirq = xilinx_pcie_assign_msi();
 	if (hwirq < 0)
-		return hwirq;
+		return -ENOSPC;
 
-	irq = irq_create_mapping(port->msi_domain, hwirq);
-	if (!irq)
-		return -EINVAL;
+	for (i = 0; i < nr_irqs; i++)
+		irq_domain_set_info(domain, virq + i, hwirq + i,
+				    &xilinx_msi_bottom_chip, domain->host_data,
+				    handle_edge_irq, NULL, NULL);
 
-	irq_set_msi_desc(irq, desc);
+	return 0;
+}
 
-	msg_addr = ALIGN_DOWN(virt_to_phys(port), SZ_4K);
+static void xilinx_msi_domain_free(struct irq_domain *domain, unsigned int virq,
+				  unsigned int nr_irqs)
+{
+	struct irq_data *d = irq_domain_get_irq_data(domain, virq);
+	struct xilinx_pcie_port *port = domain->host_data;
 
-	msg.address_hi = upper_32_bits(msg_addr);
-	msg.address_lo = lower_32_bits(msg_addr);
-	msg.data = irq;
+	mutex_lock(&port->map_lock);
 
-	pci_write_msi_msg(irq, &msg);
+	bitmap_release_region(port->msi_map, d->hwirq, order_base_2(nr_irqs));
 
-	return 0;
+	mutex_unlock(&port->map_lock);
 }
 
-/* MSI Chip Descriptor */
-static struct msi_controller xilinx_pcie_msi_chip = {
-	.setup_irq = xilinx_pcie_msi_setup_irq,
-	.teardown_irq = xilinx_msi_teardown_irq,
+static const struct irq_domain_ops xilinx_msi_domain_ops = {
+	.alloc	= xilinx_msi_domain_alloc,
+	.free	= xilinx_msi_domain_free,
 };
 
-/* HW Interrupt Chip Descriptor */
-static struct irq_chip xilinx_msi_irq_chip = {
-	.name = "Xilinx PCIe MSI",
-	.irq_enable = pci_msi_unmask_irq,
-	.irq_disable = pci_msi_mask_irq,
-	.irq_mask = pci_msi_mask_irq,
-	.irq_unmask = pci_msi_unmask_irq,
+static struct msi_domain_info xilinx_msi_info = {
+	.flags	= (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS),
+	.chip	= &xilinx_msi_top_chip,
 };
 
-/**
- * xilinx_pcie_msi_map - Set the handler for the MSI and mark IRQ as valid
- * @domain: IRQ domain
- * @irq: Virtual IRQ number
- * @hwirq: HW interrupt number
- *
- * Return: Always returns 0.
- */
-static int xilinx_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
-			       irq_hw_number_t hwirq)
+static int xilinx_allocate_msi_domains(struct xilinx_pcie_port *pcie)
 {
-	irq_set_chip_and_handler(irq, &xilinx_msi_irq_chip, handle_simple_irq);
-	irq_set_chip_data(irq, domain->host_data);
+	struct fwnode_handle *fwnode = dev_fwnode(pcie->dev);
+	struct irq_domain *parent;
+
+	parent = irq_domain_create_linear(fwnode, XILINX_NUM_MSI_IRQS,
+					  &xilinx_msi_domain_ops, pcie);
+	if (!parent) {
+		dev_err(pcie->dev, "failed to create IRQ domain\n");
+		return -ENOMEM;
+	}
+	irq_domain_update_bus_token(parent, DOMAIN_BUS_NEXUS);
+
+	pcie->msi_domain = pci_msi_create_irq_domain(fwnode, &xilinx_msi_info, parent);
+	if (!pcie->msi_domain) {
+		dev_err(pcie->dev, "failed to create MSI domain\n");
+		irq_domain_remove(parent);
+		return -ENOMEM;
+	}
 
 	return 0;
 }
 
-/* IRQ Domain operations */
-static const struct irq_domain_ops msi_domain_ops = {
-	.map = xilinx_pcie_msi_map,
-};
-
-/**
- * xilinx_pcie_enable_msi - Enable MSI support
- * @port: PCIe port information
- */
-static int xilinx_pcie_enable_msi(struct xilinx_pcie_port *port)
+static void xilinx_free_msi_domains(struct xilinx_pcie_port *pcie)
 {
-	phys_addr_t msg_addr;
-
-	msg_addr = ALIGN_DOWN(virt_to_phys(port), SZ_4K);
-	pcie_write(port, upper_32_bits(msg_addr), XILINX_PCIE_REG_MSIBASE1);
-	pcie_write(port, lower_32_bits(msg_addr), XILINX_PCIE_REG_MSIBASE2);
+	struct irq_domain *parent = pcie->msi_domain->parent;
 
-	return 0;
+	irq_domain_remove(pcie->msi_domain);
+	irq_domain_remove(parent);
 }
 
 /* INTx Functions */
@@ -414,6 +385,8 @@ static irqreturn_t xilinx_pcie_intr_handler(int irq, void *data)
 	}
 
 	if (status & (XILINX_PCIE_INTR_INTX | XILINX_PCIE_INTR_MSI)) {
+		unsigned int irq;
+
 		val = pcie_read(port, XILINX_PCIE_REG_RPIFR1);
 
 		/* Check whether interrupt valid */
@@ -426,20 +399,19 @@ static irqreturn_t xilinx_pcie_intr_handler(int irq, void *data)
 		if (val & XILINX_PCIE_RPIFR1_MSI_INTR) {
 			val = pcie_read(port, XILINX_PCIE_REG_RPIFR2) &
 				XILINX_PCIE_RPIFR2_MSG_DATA;
+			irq = irq_find_mapping(port->msi_domain->parent, val);
 		} else {
 			val = (val & XILINX_PCIE_RPIFR1_INTR_MASK) >>
 				XILINX_PCIE_RPIFR1_INTR_SHIFT;
-			val = irq_find_mapping(port->leg_domain, val);
+			irq = irq_find_mapping(port->leg_domain, val);
 		}
 
 		/* Clear interrupt FIFO register 1 */
 		pcie_write(port, XILINX_PCIE_RPIFR1_ALL_MASK,
 			   XILINX_PCIE_REG_RPIFR1);
 
-		/* Handle the interrupt */
-		if (IS_ENABLED(CONFIG_PCI_MSI) ||
-		    !(val & XILINX_PCIE_RPIFR1_MSI_INTR))
-			generic_handle_irq(val);
+		if (irq)
+			generic_handle_irq(irq);
 	}
 
 	if (status & XILINX_PCIE_INTR_SLV_UNSUPP)
@@ -485,12 +457,11 @@ error:
 static int xilinx_pcie_init_irq_domain(struct xilinx_pcie_port *port)
 {
 	struct device *dev = port->dev;
-	struct device_node *node = dev->of_node;
 	struct device_node *pcie_intc_node;
 	int ret;
 
 	/* Setup INTx */
-	pcie_intc_node = of_get_next_child(node, NULL);
+	pcie_intc_node = of_get_next_child(dev->of_node, NULL);
 	if (!pcie_intc_node) {
 		dev_err(dev, "No PCIe Intc node found\n");
 		return -ENODEV;
@@ -507,18 +478,14 @@ static int xilinx_pcie_init_irq_domain(struct xilinx_pcie_port *port)
 
 	/* Setup MSI */
 	if (IS_ENABLED(CONFIG_PCI_MSI)) {
-		port->msi_domain = irq_domain_add_linear(node,
-							 XILINX_NUM_MSI_IRQS,
-							 &msi_domain_ops,
-							 &xilinx_pcie_msi_chip);
-		if (!port->msi_domain) {
-			dev_err(dev, "Failed to get a MSI IRQ domain\n");
-			return -ENODEV;
-		}
+		phys_addr_t pa = ALIGN_DOWN(virt_to_phys(port), SZ_4K);
 
-		ret = xilinx_pcie_enable_msi(port);
+		ret = xilinx_allocate_msi_domains(port);
 		if (ret)
 			return ret;
+
+		pcie_write(port, upper_32_bits(pa), XILINX_PCIE_REG_MSIBASE1);
+		pcie_write(port, lower_32_bits(pa), XILINX_PCIE_REG_MSIBASE2);
 	}
 
 	return 0;
@@ -566,6 +533,7 @@ static int xilinx_pcie_parse_dt(struct xilinx_pcie_port *port)
 	struct device *dev = port->dev;
 	struct device_node *node = dev->of_node;
 	struct resource regs;
+	unsigned int irq;
 	int err;
 
 	err = of_address_to_resource(node, 0, &regs);
@@ -578,12 +546,12 @@ static int xilinx_pcie_parse_dt(struct xilinx_pcie_port *port)
 	if (IS_ERR(port->reg_base))
 		return PTR_ERR(port->reg_base);
 
-	port->irq = irq_of_parse_and_map(node, 0);
-	err = devm_request_irq(dev, port->irq, xilinx_pcie_intr_handler,
+	irq = irq_of_parse_and_map(node, 0);
+	err = devm_request_irq(dev, irq, xilinx_pcie_intr_handler,
 			       IRQF_SHARED | IRQF_NO_THREAD,
 			       "xilinx-pcie", port);
 	if (err) {
-		dev_err(dev, "unable to request irq %d\n", port->irq);
+		dev_err(dev, "unable to request irq %d\n", irq);
 		return err;
 	}
 
@@ -611,7 +579,7 @@ static int xilinx_pcie_probe(struct platform_device *pdev)
 		return -ENODEV;
 
 	port = pci_host_bridge_priv(bridge);
-
+	mutex_init(&port->map_lock);
 	port->dev = dev;
 
 	err = xilinx_pcie_parse_dt(port);
@@ -631,11 +599,11 @@ static int xilinx_pcie_probe(struct platform_device *pdev)
 	bridge->sysdata = port;
 	bridge->ops = &xilinx_pcie_ops;
 
-#ifdef CONFIG_PCI_MSI
-	xilinx_pcie_msi_chip.dev = dev;
-	bridge->msi = &xilinx_pcie_msi_chip;
-#endif
-	return pci_host_probe(bridge);
+	err = pci_host_probe(bridge);
+	if (err)
+		xilinx_free_msi_domains(port);
+
+	return err;
 }
 
 static const struct of_device_id xilinx_pcie_of_match[] = {
-- 
cgit v1.2.3


From e0fad163b6e7482be32ae99662240268aa0e1bf1 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Tue, 30 Mar 2021 16:11:37 +0100
Subject: PCI: hv: Drop msi_controller structure

The Hyper-V PCI driver still makes use of a msi_controller structure,
but it looks more like a distant leftover than anything actually
useful, since it is initialised to 0 and never used for anything.

Just remove it.

Link: https://lore.kernel.org/r/20210330151145.997953-7-maz@kernel.org
Tested-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/controller/pci-hyperv.c | 4 ----
 1 file changed, 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
index 27a17a1e4a7c..2c014ba7ed4b 100644
--- a/drivers/pci/controller/pci-hyperv.c
+++ b/drivers/pci/controller/pci-hyperv.c
@@ -473,7 +473,6 @@ struct hv_pcibus_device {
 	struct list_head dr_list;
 
 	struct msi_domain_info msi_info;
-	struct msi_controller msi_chip;
 	struct irq_domain *irq_domain;
 
 	spinlock_t retarget_msi_interrupt_lock;
@@ -1866,9 +1865,6 @@ static int create_root_hv_pci_bus(struct hv_pcibus_device *hbus)
 	if (!hbus->pci_bus)
 		return -ENODEV;
 
-	hbus->pci_bus->msi = &hbus->msi_chip;
-	hbus->pci_bus->msi->dev = &hbus->hdev->device;
-
 	pci_lock_rescan_remove();
 	pci_scan_child_bus(hbus->pci_bus);
 	hv_pci_assign_numa_node(hbus);
-- 
cgit v1.2.3


From 3a05d08f6cc75b74079290c33d6127b2857226fa Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Tue, 30 Mar 2021 16:11:38 +0100
Subject: PCI/MSI: Drop use of msi_controller from core code

As there is no driver using msi_controller, we can now safely
remove its use from the PCI probe code.

Link: https://lore.kernel.org/r/20210330151145.997953-8-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/msi.c   | 23 +----------------------
 drivers/pci/probe.c |  2 --
 include/linux/pci.h |  2 --
 3 files changed, 1 insertion(+), 26 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 3162f88fe940..79b5a995bd02 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -64,39 +64,18 @@ static void pci_msi_teardown_msi_irqs(struct pci_dev *dev)
 /* Arch hooks */
 int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
 {
-	struct msi_controller *chip = dev->bus->msi;
-	int err;
-
-	if (!chip || !chip->setup_irq)
-		return -EINVAL;
-
-	err = chip->setup_irq(chip, dev, desc);
-	if (err < 0)
-		return err;
-
-	irq_set_chip_data(desc->irq, chip);
-
-	return 0;
+	return -EINVAL;
 }
 
 void __weak arch_teardown_msi_irq(unsigned int irq)
 {
-	struct msi_controller *chip = irq_get_chip_data(irq);
-
-	if (!chip || !chip->teardown_irq)
-		return;
-
-	chip->teardown_irq(chip, irq);
 }
 
 int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 {
-	struct msi_controller *chip = dev->bus->msi;
 	struct msi_desc *entry;
 	int ret;
 
-	if (chip && chip->setup_irqs)
-		return chip->setup_irqs(chip, dev, nvec, type);
 	/*
 	 * If an architecture wants to support multiple MSI, it needs to
 	 * override arch_setup_msi_irqs()
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 953f15abc850..fb04fc81a8bd 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -895,7 +895,6 @@ static int pci_register_host_bridge(struct pci_host_bridge *bridge)
 	/* Temporarily move resources off the list */
 	list_splice_init(&bridge->windows, &resources);
 	bus->sysdata = bridge->sysdata;
-	bus->msi = bridge->msi;
 	bus->ops = bridge->ops;
 	bus->number = bus->busn_res.start = bridge->busnr;
 #ifdef CONFIG_PCI_DOMAINS_GENERIC
@@ -1053,7 +1052,6 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
 		return NULL;
 
 	child->parent = parent;
-	child->msi = parent->msi;
 	child->sysdata = parent->sysdata;
 	child->bus_flags = parent->bus_flags;
 
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 86c799c97b77..ebf557e59d87 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -540,7 +540,6 @@ struct pci_host_bridge {
 	int (*map_irq)(const struct pci_dev *, u8, u8);
 	void (*release_fn)(struct pci_host_bridge *);
 	void		*release_data;
-	struct msi_controller *msi;
 	unsigned int	ignore_reset_delay:1;	/* For entire hierarchy */
 	unsigned int	no_ext_tags:1;		/* No Extended Tags */
 	unsigned int	native_aer:1;		/* OS may use PCIe AER */
@@ -621,7 +620,6 @@ struct pci_bus {
 	struct resource busn_res;	/* Bus numbers routed to this bus */
 
 	struct pci_ops	*ops;		/* Configuration access functions */
-	struct msi_controller *msi;	/* MSI controller */
 	void		*sysdata;	/* Hook for sys-specific extension */
 	struct proc_dir_entry *procdir;	/* Directory entry in /proc/bus/pci */
 
-- 
cgit v1.2.3


From f8bcf249d9cf292c6ceb3d9f5bd90815090f5286 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Tue, 30 Mar 2021 16:11:40 +0100
Subject: PCI/MSI: Kill default_teardown_msi_irqs()

It doesn't have any caller left.

Link: https://lore.kernel.org/r/20210330151145.997953-10-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/msi.c   | 11 +----------
 include/linux/msi.h |  1 -
 2 files changed, 1 insertion(+), 11 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 79b5a995bd02..d9c73c173c14 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -94,11 +94,7 @@ int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 	return 0;
 }
 
-/*
- * We have a default implementation available as a separate non-weak
- * function, as it is used by the Xen x86 PCI code
- */
-void default_teardown_msi_irqs(struct pci_dev *dev)
+void __weak arch_teardown_msi_irqs(struct pci_dev *dev)
 {
 	int i;
 	struct msi_desc *entry;
@@ -108,11 +104,6 @@ void default_teardown_msi_irqs(struct pci_dev *dev)
 			for (i = 0; i < entry->nvec_used; i++)
 				arch_teardown_msi_irq(entry->irq + i);
 }
-
-void __weak arch_teardown_msi_irqs(struct pci_dev *dev)
-{
-	return default_teardown_msi_irqs(dev);
-}
 #endif /* CONFIG_PCI_MSI_ARCH_FALLBACKS */
 
 static void default_restore_msi_irq(struct pci_dev *dev, int irq)
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 3f21e77b57b7..6aff469e511d 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -250,7 +250,6 @@ int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
 void arch_teardown_msi_irq(unsigned int irq);
 int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
 void arch_teardown_msi_irqs(struct pci_dev *dev);
-void default_teardown_msi_irqs(struct pci_dev *dev);
 #else
 static inline int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 {
-- 
cgit v1.2.3


From 94e89b145371b68fa0ea294855adebcd03e0522e Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Tue, 30 Mar 2021 16:11:41 +0100
Subject: PCI/MSI: Let PCI host bridges declare their reliance on MSI domains

There is a whole class of host bridges that cannot know whether
MSIs will be provided or not, as they rely on other blocks
to provide the MSI functionnality, using MSI domains.  This is
the case for example on systems that use the ARM GIC architecture.

Introduce a new attribute ('msi_domain') indicating that implicit
dependency, and use this property to set the NO_MSI flag when
no MSI domain is found at probe time.

Link: https://lore.kernel.org/r/20210330151145.997953-11-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/probe.c | 2 ++
 include/linux/pci.h | 1 +
 2 files changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index fb04fc81a8bd..aa6fba35f5d1 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -925,6 +925,8 @@ static int pci_register_host_bridge(struct pci_host_bridge *bridge)
 	device_enable_async_suspend(bus->bridge);
 	pci_set_bus_of_node(bus);
 	pci_set_bus_msi_domain(bus);
+	if (bridge->msi_domain && !dev_get_msi_domain(&bus->dev))
+		bus->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
 
 	if (!parent)
 		set_dev_node(bus->bridge, pcibus_to_node(bus));
diff --git a/include/linux/pci.h b/include/linux/pci.h
index ebf557e59d87..ede0aef2cfd4 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -550,6 +550,7 @@ struct pci_host_bridge {
 	unsigned int	native_dpc:1;		/* OS may use PCIe DPC */
 	unsigned int	preserve_config:1;	/* Preserve FW resource setup */
 	unsigned int	size_windows:1;		/* Enable root bus sizing */
+	unsigned int	msi_domain:1;		/* Bridge wants MSI domain */
 
 	/* Resource alignment requirements */
 	resource_size_t (*align_resource)(struct pci_dev *dev,
-- 
cgit v1.2.3


From 9ec37efb87832b578d7972fc80b04d94f5d2bbe3 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Tue, 30 Mar 2021 16:11:42 +0100
Subject: PCI/MSI: Make pci_host_common_probe() declare its reliance on MSI
 domains

The generic PCI host driver relies on MSI domains for MSIs to
be provided to its end-points. Make this dependency explicit.

This cures the warnings occuring on arm/arm64 VMs when booted
with PCI virtio devices and no MSI controller (no GICv3 ITS,
for example).

It is likely that other drivers will need to express the same
dependency.

Link: https://lore.kernel.org/r/20210330151145.997953-12-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/controller/pci-host-common.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pci-host-common.c b/drivers/pci/controller/pci-host-common.c
index 6ab694f8d283..d3924a44db02 100644
--- a/drivers/pci/controller/pci-host-common.c
+++ b/drivers/pci/controller/pci-host-common.c
@@ -79,6 +79,7 @@ int pci_host_common_probe(struct platform_device *pdev)
 
 	bridge->sysdata = cfg;
 	bridge->ops = (struct pci_ops *)&ops->pci_ops;
+	bridge->msi_domain = true;
 
 	return pci_host_probe(bridge);
 }
-- 
cgit v1.2.3


From 645e9c38383d7fcde2784ee537fa18ec9bed54d9 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 30 Mar 2021 16:11:43 +0100
Subject: PCI: mediatek: Advertise lack of built-in MSI handling

Some Mediatek host bridges cannot handle MSIs, which is sad.
This also results in an ugly warning at device probe time,
as the core PCI code wasn't told that MSIs were not available.

Advertise this fact to the rest of the core PCI code by
using the 'msi_domain' attribute, which still opens the possibility
for another block to provide the MSI functionnality.

[maz: commit message, switched over to msi_domain attribute]

Link: https://lore.kernel.org/r/20210330151145.997953-13-maz@kernel.org
Reported-by: Frank Wunderlich <frank-w@public-files.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/controller/pcie-mediatek.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
index 23548b517e4b..9c10d87b6134 100644
--- a/drivers/pci/controller/pcie-mediatek.c
+++ b/drivers/pci/controller/pcie-mediatek.c
@@ -143,6 +143,7 @@ struct mtk_pcie_port;
  * struct mtk_pcie_soc - differentiate between host generations
  * @need_fix_class_id: whether this host's class ID needed to be fixed or not
  * @need_fix_device_id: whether this host's device ID needed to be fixed or not
+ * @no_msi: Bridge has no MSI support, and relies on an external block
  * @device_id: device ID which this host need to be fixed
  * @ops: pointer to configuration access functions
  * @startup: pointer to controller setting functions
@@ -151,6 +152,7 @@ struct mtk_pcie_port;
 struct mtk_pcie_soc {
 	bool need_fix_class_id;
 	bool need_fix_device_id;
+	bool no_msi;
 	unsigned int device_id;
 	struct pci_ops *ops;
 	int (*startup)(struct mtk_pcie_port *port);
@@ -1087,6 +1089,7 @@ static int mtk_pcie_probe(struct platform_device *pdev)
 
 	host->ops = pcie->soc->ops;
 	host->sysdata = pcie;
+	host->msi_domain = pcie->soc->no_msi;
 
 	err = pci_host_probe(host);
 	if (err)
@@ -1176,6 +1179,7 @@ static const struct dev_pm_ops mtk_pcie_pm_ops = {
 };
 
 static const struct mtk_pcie_soc mtk_pcie_soc_v1 = {
+	.no_msi = true,
 	.ops = &mtk_pcie_ops,
 	.startup = mtk_pcie_startup_port,
 };
-- 
cgit v1.2.3


From 61af69296cbadf4c88a1076a3b3e5572827b04c8 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Tue, 30 Mar 2021 16:11:44 +0100
Subject: PCI/MSI: Document the various ways of ending up with NO_MSI

We have now three ways of ending up with NO_MSI being set.
Document them.

Link: https://lore.kernel.org/r/20210330151145.997953-14-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/msi.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index d9c73c173c14..217dc9f0231f 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -871,8 +871,15 @@ static int pci_msi_supported(struct pci_dev *dev, int nvec)
 	 * Any bridge which does NOT route MSI transactions from its
 	 * secondary bus to its primary bus must set NO_MSI flag on
 	 * the secondary pci_bus.
-	 * We expect only arch-specific PCI host bus controller driver
-	 * or quirks for specific PCI bridges to be setting NO_MSI.
+	 *
+	 * The NO_MSI flag can either be set directly by:
+	 * - arch-specific PCI host bus controller drivers (deprecated)
+	 * - quirks for specific PCI bridges
+	 *
+	 * or indirectly by platform-specific PCI host bridge drivers by
+	 * advertising the 'msi_domain' property, which results in
+	 * the NO_MSI flag when no MSI domain is found for this bridge
+	 * at probe time.
 	 */
 	for (bus = dev->bus; bus; bus = bus->parent)
 		if (bus->bus_flags & PCI_BUS_FLAGS_NO_MSI)
-- 
cgit v1.2.3


From 557853f4e23e60b6c5a6ec4771bbdf39bbae15d0 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Tue, 30 Mar 2021 16:11:45 +0100
Subject: PCI: Refactor HT advertising of NO_MSI flag

The few quirks that deal with NO_MSI tend to be copy-paste heavy.
Refactor them so that the hierarchy of conditions is slightly
cleaner.

Link: https://lore.kernel.org/r/20210330151145.997953-15-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/quirks.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 653660e3ba9e..972bb0f9f994 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2585,10 +2585,8 @@ static int msi_ht_cap_enabled(struct pci_dev *dev)
 /* Check the HyperTransport MSI mapping to know whether MSI is enabled or not */
 static void quirk_msi_ht_cap(struct pci_dev *dev)
 {
-	if (dev->subordinate && !msi_ht_cap_enabled(dev)) {
-		pci_warn(dev, "MSI quirk detected; subordinate MSI disabled\n");
-		dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
-	}
+	if (!msi_ht_cap_enabled(dev))
+		quirk_disable_msi(dev);
 }
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT2000_PCIE,
 			quirk_msi_ht_cap);
@@ -2601,9 +2599,6 @@ static void quirk_nvidia_ck804_msi_ht_cap(struct pci_dev *dev)
 {
 	struct pci_dev *pdev;
 
-	if (!dev->subordinate)
-		return;
-
 	/*
 	 * Check HT MSI cap on this chipset and the root one.  A single one
 	 * having MSI is enough to be sure that MSI is supported.
@@ -2611,10 +2606,8 @@ static void quirk_nvidia_ck804_msi_ht_cap(struct pci_dev *dev)
 	pdev = pci_get_slot(dev->bus, 0);
 	if (!pdev)
 		return;
-	if (!msi_ht_cap_enabled(dev) && !msi_ht_cap_enabled(pdev)) {
-		pci_warn(dev, "MSI quirk detected; subordinate MSI disabled\n");
-		dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
-	}
+	if (!msi_ht_cap_enabled(pdev))
+		quirk_msi_ht_cap(dev);
 	pci_dev_put(pdev);
 }
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_CK804_PCIE,
-- 
cgit v1.2.3


From 5a4a8235fee69b5a31cf1c56a9fa14b0d21a930c Mon Sep 17 00:00:00 2001
From: Zhen Lei <thunder.leizhen@huawei.com>
Date: Tue, 6 Apr 2021 17:19:12 +0800
Subject: thermal/drivers/ti-soc-thermal/ti-bandgap: Rearrange all the included
 header files alphabetically

For the sake of lisibility, reorder the header files alphabetically.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Reviewed-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210406091912.2583-2-thunder.leizhen@huawei.com
---
 drivers/thermal/ti-soc-thermal/ti-bandgap.c | 34 ++++++++++++++---------------
 1 file changed, 17 insertions(+), 17 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.c b/drivers/thermal/ti-soc-thermal/ti-bandgap.c
index d81af89166d2..008fbed5a118 100644
--- a/drivers/thermal/ti-soc-thermal/ti-bandgap.c
+++ b/drivers/thermal/ti-soc-thermal/ti-bandgap.c
@@ -9,29 +9,29 @@
  *   Eduardo Valentin <eduardo.valentin@ti.com>
  */
 
-#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/cpu_pm.h>
+#include <linux/device.h>
+#include <linux/err.h>
 #include <linux/export.h>
+#include <linux/gpio/consumer.h>
 #include <linux/init.h>
-#include <linux/kernel.h>
 #include <linux/interrupt.h>
-#include <linux/clk.h>
-#include <linux/gpio/consumer.h>
-#include <linux/platform_device.h>
-#include <linux/err.h>
-#include <linux/types.h>
-#include <linux/spinlock.h>
-#include <linux/sys_soc.h>
-#include <linux/reboot.h>
-#include <linux/of_device.h>
-#include <linux/of_platform.h>
-#include <linux/of_irq.h>
 #include <linux/io.h>
 #include <linux/iopoll.h>
-#include <linux/cpu_pm.h>
-#include <linux/device.h>
-#include <linux/pm_runtime.h>
-#include <linux/pm.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/reboot.h>
+#include <linux/spinlock.h>
+#include <linux/sys_soc.h>
+#include <linux/types.h>
 
 #include "ti-bandgap.h"
 
-- 
cgit v1.2.3


From 670160fea22c587b384d56698bbb661fa4801534 Mon Sep 17 00:00:00 2001
From: Prashant Malani <pmalani@chromium.org>
Date: Tue, 20 Apr 2021 10:10:09 -0700
Subject: platform/chrome: cros_ec_typec: Track port role

Stash the currently reported port role in the port struct and add a
check for that too while determining whether to re-configure on-board
Type C switches (this deals with cases like role swaps where the mux
flags don't change, but the port role does).

Signed-off-by: Prashant Malani <pmalani@chromium.org>
Suggested-by: Nikunj A. Dadhania <nikunj.dadhania@intel.com>
Tested-by: Deepti Deshatty <deepti.deshatty@intel.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20210420171008.3829549-1-pmalani@chromium.org
---
 drivers/platform/chrome/cros_ec_typec.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index d3df1717a5fd..1a06b8c80f80 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -58,6 +58,7 @@ struct cros_typec_port {
 	/* Variables keeping track of switch state. */
 	struct typec_mux_state state;
 	uint8_t mux_flags;
+	uint8_t role;
 
 	/* Port alt modes. */
 	struct typec_altmode p_altmode[CROS_EC_ALTMODE_MAX];
@@ -995,10 +996,12 @@ static int cros_typec_port_update(struct cros_typec_data *typec, int port_num)
 	}
 
 	/* No change needs to be made, let's exit early. */
-	if (typec->ports[port_num]->mux_flags == mux_resp.flags)
+	if (typec->ports[port_num]->mux_flags == mux_resp.flags &&
+	    typec->ports[port_num]->role == resp.role)
 		return 0;
 
 	typec->ports[port_num]->mux_flags = mux_resp.flags;
+	typec->ports[port_num]->role = resp.role;
 	ret = cros_typec_configure_mux(typec, port_num, mux_resp.flags, &resp);
 	if (ret)
 		dev_warn(typec->dev, "Configure muxes failed, err = %d\n", ret);
-- 
cgit v1.2.3


From 944b3a639573796debe3cd47298a5dd79810be73 Mon Sep 17 00:00:00 2001
From: Prashant Malani <pmalani@chromium.org>
Date: Tue, 20 Apr 2021 10:16:13 -0700
Subject: platform/chrome: cros_ec_typec: Handle hard reset

The Chrome Embedded Controller (EC) generates a hard reset type C event
when a USB Power Delivery (PD) hard reset is encountered. Handle this
event by unregistering the partner and cable on the associated port and
clearing the event flag.

Cc: Benson Leung <bleung@chromium.org>
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20210420171617.3830902-2-pmalani@chromium.org
---
 drivers/platform/chrome/cros_ec_typec.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'drivers')

diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index 1a06b8c80f80..60c21911a6c8 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -906,6 +906,19 @@ static void cros_typec_handle_status(struct cros_typec_data *typec, int port_num
 		return;
 	}
 
+	/* If we got a hard reset, unregister everything and return. */
+	if (resp.events & PD_STATUS_EVENT_HARD_RESET) {
+		cros_typec_remove_partner(typec, port_num);
+		cros_typec_remove_cable(typec, port_num);
+
+		ret = cros_typec_send_clear_event(typec, port_num,
+						  PD_STATUS_EVENT_HARD_RESET);
+		if (ret < 0)
+			dev_warn(typec->dev,
+				 "Failed hard reset event clear, port: %d\n", port_num);
+		return;
+	}
+
 	/* Handle any events appropriately. */
 	if (resp.events & PD_STATUS_EVENT_SOP_DISC_DONE && !typec->ports[port_num]->sop_disc_done) {
 		u16 sop_revision;
-- 
cgit v1.2.3


From c5bb32f57bf3a30ed03be51f7be0840325ba8b4a Mon Sep 17 00:00:00 2001
From: Prashant Malani <pmalani@chromium.org>
Date: Tue, 20 Apr 2021 21:21:09 -0700
Subject: platform/chrome: cros_ec_typec: Add DP mode check

There are certain transitional situations where the dp_mode field in the
PD_CONTROL response might not be populated with the right DP pin
assignment value yet. Add a check for that to avoid sending an invalid
value to the Type C mode switch.

Signed-off-by: Prashant Malani <pmalani@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20210421042108.2002-1-pmalani@chromium.org
---
 drivers/platform/chrome/cros_ec_typec.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'drivers')

diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index 60c21911a6c8..27c068c4c38d 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -487,6 +487,11 @@ static int cros_typec_enable_dp(struct cros_typec_data *typec,
 		return -ENOTSUPP;
 	}
 
+	if (!pd_ctrl->dp_mode) {
+		dev_err(typec->dev, "No valid DP mode provided.\n");
+		return -EINVAL;
+	}
+
 	/* Status VDO. */
 	dp_data.status = DP_STATUS_ENABLED;
 	if (port->mux_flags & USB_PD_MUX_HPD_IRQ)
-- 
cgit v1.2.3


From 4423ee65f76818c8a8994e6f5821372661ea7f89 Mon Sep 17 00:00:00 2001
From: Pi-Hsun Shih <pihsun@chromium.org>
Date: Wed, 14 Apr 2021 14:45:24 +0800
Subject: platform/chrome: cros_usbpd_notify: Listen to EC_HOST_EVENT_USB_MUX
 host event

On system that use ACPI, cros_usbpd_notify gets notifications of USB MUX
host event same as PD host events [1]. But currently on system that use
DT, the driver only listen on EC_HOST_EVENT_PD_MCU.

Add EC_HOST_EVENT_USB_MUX to the list of host events, so we have same
behavior on all platforms.

[1]: https://chromium.googlesource.com/chromiumos/third_party/coreboot/+/refs/heads/chromeos-2016.05/src/ec/google/chromeec/acpi/ec.asl#382

Signed-off-by: Pi-Hsun Shih <pihsun@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20210414064524.2450908-1-pihsun@chromium.org
---
 drivers/platform/chrome/cros_usbpd_notify.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/platform/chrome/cros_usbpd_notify.c b/drivers/platform/chrome/cros_usbpd_notify.c
index 7f36142ab12a..48a6617aa12f 100644
--- a/drivers/platform/chrome/cros_usbpd_notify.c
+++ b/drivers/platform/chrome/cros_usbpd_notify.c
@@ -220,7 +220,8 @@ static int cros_usbpd_notify_plat(struct notifier_block *nb,
 	if (!host_event)
 		return NOTIFY_DONE;
 
-	if (host_event & EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU)) {
+	if (host_event & (EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU) |
+			  EC_HOST_EVENT_MASK(EC_HOST_EVENT_USB_MUX))) {
 		cros_usbpd_get_event_and_notify(pdnotify->dev, ec_dev);
 		return NOTIFY_OK;
 	}
-- 
cgit v1.2.3


From d61b3f9b91be32f714b218377ab5081932e3ebc2 Mon Sep 17 00:00:00 2001
From: Ye Bin <yebin10@huawei.com>
Date: Fri, 9 Apr 2021 17:51:38 +0800
Subject: platform/chrome: cros_ec_lpc: Use DEFINE_MUTEX() for mutex lock

mutex lock can be initialized automatically with DEFINE_MUTEX()
rather than explicitly calling mutex_init().

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Ye Bin <yebin10@huawei.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20210409095138.2293869-1-yebin10@huawei.com
---
 drivers/platform/chrome/cros_ec_lpc_mec.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/platform/chrome/cros_ec_lpc_mec.c b/drivers/platform/chrome/cros_ec_lpc_mec.c
index 9035b17e8c86..bbc2884f5e2f 100644
--- a/drivers/platform/chrome/cros_ec_lpc_mec.c
+++ b/drivers/platform/chrome/cros_ec_lpc_mec.c
@@ -14,7 +14,7 @@
  * This mutex must be held while accessing the EMI unit. We can't rely on the
  * EC mutex because memmap data may be accessed without it being held.
  */
-static struct mutex io_mutex;
+static DEFINE_MUTEX(io_mutex);
 static u16 mec_emi_base, mec_emi_end;
 
 /**
@@ -142,7 +142,6 @@ EXPORT_SYMBOL(cros_ec_lpc_io_bytes_mec);
 
 void cros_ec_lpc_mec_init(unsigned int base, unsigned int end)
 {
-	mutex_init(&io_mutex);
 	mec_emi_base = base;
 	mec_emi_end = end;
 }
-- 
cgit v1.2.3


From d473327f8f53418691cb2944a45da3e9ea51f9bf Mon Sep 17 00:00:00 2001
From: Lin Ruizhe <linruizhe@huawei.com>
Date: Wed, 21 Apr 2021 16:42:56 +0800
Subject: thermal/drivers/ti-soc-thermal/bandgap Remove unused variable 'val'

The function ti_bandgap_restore_ctxt() restores the context at resume
time. It checks if the sensor has a counter, reads the register but
does nothing with the value.

The block was probably omitted by the commit b87ea759a4cc.

Remove the unused variable as well as the block using it as we can
consider it as dead code.

Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: b87ea759a4cc ("staging: omap-thermal: fix context restore function")
Signed-off-by: Lin Ruizhe <linruizhe@huawei.com>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210421084256.57591-1-linruizhe@huawei.com
---
 drivers/thermal/ti-soc-thermal/ti-bandgap.c | 4 ----
 1 file changed, 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.c b/drivers/thermal/ti-soc-thermal/ti-bandgap.c
index 008fbed5a118..ebe7cb70bfb6 100644
--- a/drivers/thermal/ti-soc-thermal/ti-bandgap.c
+++ b/drivers/thermal/ti-soc-thermal/ti-bandgap.c
@@ -1142,14 +1142,10 @@ static int ti_bandgap_restore_ctxt(struct ti_bandgap *bgp)
 	for (i = 0; i < bgp->conf->sensor_count; i++) {
 		struct temp_sensor_registers *tsr;
 		struct temp_sensor_regval *rval;
-		u32 val = 0;
 
 		rval = &bgp->regval[i];
 		tsr = bgp->conf->sensors[i].registers;
 
-		if (TI_BANDGAP_HAS(bgp, COUNTER))
-			val = ti_bandgap_readl(bgp, tsr->bgap_counter);
-
 		if (TI_BANDGAP_HAS(bgp, TSHUT_CONFIG))
 			ti_bandgap_writel(bgp, rval->tshut_threshold,
 					  tsr->tshut_threshold);
-- 
cgit v1.2.3


From 93effd83b6927c0252bb1e35aa3e116d3e2527bb Mon Sep 17 00:00:00 2001
From: Thara Gopinath <thara.gopinath@linaro.org>
Date: Thu, 21 Jan 2021 21:34:04 -0500
Subject: iwlwifi: mvm: tt: Replace thermal_notify_framework

thermal_notify_framework just updates for a single trip point where as
thermal_zone_device_update does other bookkeeping like updating the
temperature of the thermal zone and setting the next trip point etc.
Replace thermal_notify_framework with thermal_zone_device_update as the
later is more thorough.

Acked-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210122023406.3500424-2-thara.gopinath@linaro.org
---
 drivers/net/wireless/intel/iwlwifi/mvm/tt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
index 2a7339b12b13..398390c59344 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
@@ -146,8 +146,8 @@ void iwl_mvm_temp_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
 	if (mvm->tz_device.tzone) {
 		struct iwl_mvm_thermal_device *tz_dev = &mvm->tz_device;
 
-		thermal_notify_framework(tz_dev->tzone,
-					 tz_dev->fw_trips_index[ths_crossed]);
+		thermal_zone_device_update(tz_dev->tzone,
+					   THERMAL_TRIP_VIOLATED);
 	}
 #endif /* CONFIG_THERMAL */
 }
-- 
cgit v1.2.3


From d60d6e7adfc3814f6de03c978ff1daab21478f87 Mon Sep 17 00:00:00 2001
From: Thara Gopinath <thara.gopinath@linaro.org>
Date: Thu, 21 Jan 2021 21:34:05 -0500
Subject: thermal/core: Remove thermal_notify_framework

thermal_notify_framework just updates for a single trip point where as
thermal_zone_device_update does other bookkeeping like updating the
temperature of the thermal zone and setting the next trip point. The only
driver that was using thermal_notify_framework was updated in the previous
patch to use thermal_zone_device_update instead. Since there are no users
for thermal_notify_framework remove it.

Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210122023406.3500424-3-thara.gopinath@linaro.org
---
 drivers/thermal/thermal_core.c | 18 ------------------
 include/linux/thermal.h        |  5 -----
 2 files changed, 23 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 3566fd291399..d20b25f40d19 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -561,24 +561,6 @@ void thermal_zone_device_update(struct thermal_zone_device *tz,
 }
 EXPORT_SYMBOL_GPL(thermal_zone_device_update);
 
-/**
- * thermal_notify_framework - Sensor drivers use this API to notify framework
- * @tz:		thermal zone device
- * @trip:	indicates which trip point has been crossed
- *
- * This function handles the trip events from sensor drivers. It starts
- * throttling the cooling devices according to the policy configured.
- * For CRITICAL and HOT trip points, this notifies the respective drivers,
- * and does actual throttling for other trip points i.e ACTIVE and PASSIVE.
- * The throttling policy is based on the configured platform data; if no
- * platform data is provided, this uses the step_wise throttling policy.
- */
-void thermal_notify_framework(struct thermal_zone_device *tz, int trip)
-{
-	handle_thermal_trip(tz, trip);
-}
-EXPORT_SYMBOL_GPL(thermal_notify_framework);
-
 static void thermal_zone_device_check(struct work_struct *work)
 {
 	struct thermal_zone_device *tz = container_of(work, struct
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 169502164364..d296f3b88fb9 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -390,7 +390,6 @@ int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);
 int thermal_zone_get_slope(struct thermal_zone_device *tz);
 int thermal_zone_get_offset(struct thermal_zone_device *tz);
 
-void thermal_notify_framework(struct thermal_zone_device *, int);
 int thermal_zone_device_enable(struct thermal_zone_device *tz);
 int thermal_zone_device_disable(struct thermal_zone_device *tz);
 void thermal_zone_device_critical(struct thermal_zone_device *tz);
@@ -436,10 +435,6 @@ static inline int thermal_zone_get_offset(
 		struct thermal_zone_device *tz)
 { return -ENODEV; }
 
-static inline void thermal_notify_framework(struct thermal_zone_device *tz,
-	int trip)
-{ }
-
 static inline int thermal_zone_device_enable(struct thermal_zone_device *tz)
 { return -ENODEV; }
 
-- 
cgit v1.2.3


From 9d51769b2e75bb33c56c8f9ee933eca2d92b375b Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Tue, 20 Apr 2021 20:33:35 +0200
Subject: thermal/drivers/tsens: Don't hardcode sensor slope

Function compute_intercept_slope hardcode the sensor slope to
SLOPE_DEFAULT. Change this and use the default value only if a slope is
not defined. This is needed for tsens VER_0 that has a hardcoded slope
table.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210420183343.2272-2-ansuelsmth@gmail.com
---
 drivers/thermal/qcom/tsens.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index a5da6a74a465..d6f802100641 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -85,7 +85,8 @@ void compute_intercept_slope(struct tsens_priv *priv, u32 *p1,
 			"%s: sensor%d - data_point1:%#x data_point2:%#x\n",
 			__func__, i, p1[i], p2[i]);
 
-		priv->sensor[i].slope = SLOPE_DEFAULT;
+		if (!priv->sensor[i].slope)
+			priv->sensor[i].slope = SLOPE_DEFAULT;
 		if (mode == TWO_PT_CALIB) {
 			/*
 			 * slope (m) = adc_code2 - adc_code1 (y2 - y1)/
-- 
cgit v1.2.3


From a0ed1411278db902a043e584c8ed320fe34346b6 Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Tue, 20 Apr 2021 20:33:36 +0200
Subject: thermal/drivers/tsens: Convert msm8960 to reg_field

Convert msm9860 driver to reg_field to use the init_common
function.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Acked-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210420183343.2272-3-ansuelsmth@gmail.com
---
 drivers/thermal/qcom/tsens-8960.c | 73 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 71 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c
index 2a28a5af209e..0d0c2647da86 100644
--- a/drivers/thermal/qcom/tsens-8960.c
+++ b/drivers/thermal/qcom/tsens-8960.c
@@ -51,11 +51,22 @@
 #define MIN_LIMIT_TH		0x0
 #define MAX_LIMIT_TH		0xff
 
-#define S0_STATUS_ADDR		0x3628
 #define INT_STATUS_ADDR		0x363c
 #define TRDY_MASK		BIT(7)
 #define TIMEOUT_US		100
 
+#define S0_STATUS_OFF		0x3628
+#define S1_STATUS_OFF		0x362c
+#define S2_STATUS_OFF		0x3630
+#define S3_STATUS_OFF		0x3634
+#define S4_STATUS_OFF		0x3638
+#define S5_STATUS_OFF		0x3664  /* Sensors 5-10 found on apq8064/msm8960 */
+#define S6_STATUS_OFF		0x3668
+#define S7_STATUS_OFF		0x366c
+#define S8_STATUS_OFF		0x3670
+#define S9_STATUS_OFF		0x3674
+#define S10_STATUS_OFF		0x3678
+
 static int suspend_8960(struct tsens_priv *priv)
 {
 	int ret;
@@ -179,7 +190,7 @@ static int init_8960(struct tsens_priv *priv)
 	 */
 	for (i = 0; i < priv->num_sensors; i++) {
 		if (i >= 5)
-			priv->sensor[i].status = S0_STATUS_ADDR + 40;
+			priv->sensor[i].status = S0_STATUS_OFF + 40;
 		priv->sensor[i].status += i * 4;
 	}
 
@@ -269,6 +280,63 @@ static int get_temp_8960(const struct tsens_sensor *s, int *temp)
 	return -ETIMEDOUT;
 }
 
+static const struct reg_field tsens_8960_regfields[MAX_REGFIELDS] = {
+	/* ----- SROT ------ */
+	/* No VERSION information */
+
+	/* CNTL */
+	[TSENS_EN]     = REG_FIELD(CNTL_ADDR,  0, 0),
+	[TSENS_SW_RST] = REG_FIELD(CNTL_ADDR,  1, 1),
+	/* 8960 has 5 sensors, 8660 has 11, we only handle 5 */
+	[SENSOR_EN]    = REG_FIELD(CNTL_ADDR,  3, 7),
+
+	/* ----- TM ------ */
+	/* INTERRUPT ENABLE */
+	/* NO INTERRUPT ENABLE */
+
+	/* Single UPPER/LOWER TEMPERATURE THRESHOLD for all sensors */
+	[LOW_THRESH_0]   = REG_FIELD(THRESHOLD_ADDR,  0,  7),
+	[UP_THRESH_0]    = REG_FIELD(THRESHOLD_ADDR,  8, 15),
+	/* MIN_THRESH_0 and MAX_THRESH_0 are not present in the regfield
+	 * Recycle CRIT_THRESH_0 and 1 to set the required regs to hardcoded temp
+	 * MIN_THRESH_0 -> CRIT_THRESH_1
+	 * MAX_THRESH_0 -> CRIT_THRESH_0
+	 */
+	[CRIT_THRESH_1]   = REG_FIELD(THRESHOLD_ADDR, 16, 23),
+	[CRIT_THRESH_0]   = REG_FIELD(THRESHOLD_ADDR, 24, 31),
+
+	/* UPPER/LOWER INTERRUPT [CLEAR/STATUS] */
+	/* 1 == clear, 0 == normal operation */
+	[LOW_INT_CLEAR_0]   = REG_FIELD(CNTL_ADDR,  9,  9),
+	[UP_INT_CLEAR_0]    = REG_FIELD(CNTL_ADDR, 10, 10),
+
+	/* NO CRITICAL INTERRUPT SUPPORT on 8960 */
+
+	/* Sn_STATUS */
+	[LAST_TEMP_0]  = REG_FIELD(S0_STATUS_OFF,  0,  7),
+	[LAST_TEMP_1]  = REG_FIELD(S1_STATUS_OFF,  0,  7),
+	[LAST_TEMP_2]  = REG_FIELD(S2_STATUS_OFF,  0,  7),
+	[LAST_TEMP_3]  = REG_FIELD(S3_STATUS_OFF,  0,  7),
+	[LAST_TEMP_4]  = REG_FIELD(S4_STATUS_OFF,  0,  7),
+	[LAST_TEMP_5]  = REG_FIELD(S5_STATUS_OFF,  0,  7),
+	[LAST_TEMP_6]  = REG_FIELD(S6_STATUS_OFF,  0,  7),
+	[LAST_TEMP_7]  = REG_FIELD(S7_STATUS_OFF,  0,  7),
+	[LAST_TEMP_8]  = REG_FIELD(S8_STATUS_OFF,  0,  7),
+	[LAST_TEMP_9]  = REG_FIELD(S9_STATUS_OFF,  0,  7),
+	[LAST_TEMP_10] = REG_FIELD(S10_STATUS_OFF, 0,  7),
+
+	/* No VALID field on 8960 */
+	/* TSENS_INT_STATUS bits: 1 == threshold violated */
+	[MIN_STATUS_0] = REG_FIELD(INT_STATUS_ADDR, 0, 0),
+	[LOWER_STATUS_0] = REG_FIELD(INT_STATUS_ADDR, 1, 1),
+	[UPPER_STATUS_0] = REG_FIELD(INT_STATUS_ADDR, 2, 2),
+	/* No CRITICAL field on 8960 */
+	[MAX_STATUS_0] = REG_FIELD(INT_STATUS_ADDR, 3, 3),
+
+	/* TRDY: 1=ready, 0=in progress */
+	[TRDY] = REG_FIELD(INT_STATUS_ADDR, 7, 7),
+};
+
 static const struct tsens_ops ops_8960 = {
 	.init		= init_8960,
 	.calibrate	= calibrate_8960,
@@ -282,4 +350,5 @@ static const struct tsens_ops ops_8960 = {
 struct tsens_plat_data data_8960 = {
 	.num_sensors	= 11,
 	.ops		= &ops_8960,
+	.fields		= tsens_8960_regfields,
 };
-- 
cgit v1.2.3


From 53e2a20e4c41683b695145436b34aa4a14bbcd8c Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Tue, 20 Apr 2021 20:33:37 +0200
Subject: thermal/drivers/tsens: Add VER_0 tsens version

VER_0 is used to describe device based on tsens version before v0.1.
These device are devices based on msm8960 for example apq8064 or
ipq806x. Add support for VER_0 in tsens.c and set the right tsens feat
in tsens-8960.c file.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Thara Gopinath <thara.gopinath@linaro.org>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210420183343.2272-4-ansuelsmth@gmail.com
---
 drivers/thermal/qcom/tsens-8960.c |   9 +++
 drivers/thermal/qcom/tsens.c      | 150 ++++++++++++++++++++++++++++++--------
 drivers/thermal/qcom/tsens.h      |   4 +-
 3 files changed, 133 insertions(+), 30 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c
index 0d0c2647da86..0dd15e812208 100644
--- a/drivers/thermal/qcom/tsens-8960.c
+++ b/drivers/thermal/qcom/tsens-8960.c
@@ -347,8 +347,17 @@ static const struct tsens_ops ops_8960 = {
 	.resume		= resume_8960,
 };
 
+static struct tsens_features tsens_8960_feat = {
+	.ver_major	= VER_0,
+	.crit_int	= 0,
+	.adc		= 1,
+	.srot_split	= 0,
+	.max_sensors	= 11,
+};
+
 struct tsens_plat_data data_8960 = {
 	.num_sensors	= 11,
 	.ops		= &ops_8960,
+	.feat		= &tsens_8960_feat,
 	.fields		= tsens_8960_regfields,
 };
diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index d6f802100641..83e01cb370f9 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -12,6 +12,7 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_platform.h>
+#include <linux/mfd/syscon.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
 #include <linux/regmap.h>
@@ -516,6 +517,15 @@ static irqreturn_t tsens_irq_thread(int irq, void *data)
 			dev_dbg(priv->dev, "[%u] %s: no violation:  %d\n",
 				hw_id, __func__, temp);
 		}
+
+		if (tsens_version(priv) < VER_0_1) {
+			/* Constraint: There is only 1 interrupt control register for all
+			 * 11 temperature sensor. So monitoring more than 1 sensor based
+			 * on interrupts will yield inconsistent result. To overcome this
+			 * issue we will monitor only sensor 0 which is the master sensor.
+			 */
+			break;
+		}
 	}
 
 	return IRQ_HANDLED;
@@ -531,6 +541,13 @@ static int tsens_set_trips(void *_sensor, int low, int high)
 	int high_val, low_val, cl_high, cl_low;
 	u32 hw_id = s->hw_id;
 
+	if (tsens_version(priv) < VER_0_1) {
+		/* Pre v0.1 IP had a single register for each type of interrupt
+		 * and thresholds
+		 */
+		hw_id = 0;
+	}
+
 	dev_dbg(dev, "[%u] %s: proposed thresholds: (%d:%d)\n",
 		hw_id, __func__, low, high);
 
@@ -585,18 +602,21 @@ int get_temp_tsens_valid(const struct tsens_sensor *s, int *temp)
 	u32 valid;
 	int ret;
 
-	ret = regmap_field_read(priv->rf[valid_idx], &valid);
-	if (ret)
-		return ret;
-	while (!valid) {
-		/* Valid bit is 0 for 6 AHB clock cycles.
-		 * At 19.2MHz, 1 AHB clock is ~60ns.
-		 * We should enter this loop very, very rarely.
-		 */
-		ndelay(400);
+	/* VER_0 doesn't have VALID bit */
+	if (tsens_version(priv) >= VER_0_1) {
 		ret = regmap_field_read(priv->rf[valid_idx], &valid);
 		if (ret)
 			return ret;
+		while (!valid) {
+			/* Valid bit is 0 for 6 AHB clock cycles.
+			 * At 19.2MHz, 1 AHB clock is ~60ns.
+			 * We should enter this loop very, very rarely.
+			 */
+			ndelay(400);
+			ret = regmap_field_read(priv->rf[valid_idx], &valid);
+			if (ret)
+				return ret;
+		}
 	}
 
 	/* Valid bit is set, OK to read the temperature */
@@ -609,15 +629,29 @@ int get_temp_common(const struct tsens_sensor *s, int *temp)
 {
 	struct tsens_priv *priv = s->priv;
 	int hw_id = s->hw_id;
-	int last_temp = 0, ret;
+	int last_temp = 0, ret, trdy;
+	unsigned long timeout;
 
-	ret = regmap_field_read(priv->rf[LAST_TEMP_0 + hw_id], &last_temp);
-	if (ret)
-		return ret;
+	timeout = jiffies + usecs_to_jiffies(TIMEOUT_US);
+	do {
+		if (tsens_version(priv) == VER_0) {
+			ret = regmap_field_read(priv->rf[TRDY], &trdy);
+			if (ret)
+				return ret;
+			if (!trdy)
+				continue;
+		}
 
-	*temp = code_to_degc(last_temp, s) * 1000;
+		ret = regmap_field_read(priv->rf[LAST_TEMP_0 + hw_id], &last_temp);
+		if (ret)
+			return ret;
 
-	return 0;
+		*temp = code_to_degc(last_temp, s) * 1000;
+
+		return 0;
+	} while (time_before(jiffies, timeout));
+
+	return -ETIMEDOUT;
 }
 
 #ifdef CONFIG_DEBUG_FS
@@ -739,19 +773,34 @@ int __init init_common(struct tsens_priv *priv)
 		priv->tm_offset = 0x1000;
 	}
 
-	res = platform_get_resource(op, IORESOURCE_MEM, 0);
-	tm_base = devm_ioremap_resource(dev, res);
-	if (IS_ERR(tm_base)) {
-		ret = PTR_ERR(tm_base);
-		goto err_put_device;
+	if (tsens_version(priv) >= VER_0_1) {
+		res = platform_get_resource(op, IORESOURCE_MEM, 0);
+		tm_base = devm_ioremap_resource(dev, res);
+		if (IS_ERR(tm_base)) {
+			ret = PTR_ERR(tm_base);
+			goto err_put_device;
+		}
+
+		priv->tm_map = devm_regmap_init_mmio(dev, tm_base, &tsens_config);
+	} else { /* VER_0 share the same gcc regs using a syscon */
+		struct device *parent = priv->dev->parent;
+
+		if (parent)
+			priv->tm_map = syscon_node_to_regmap(parent->of_node);
 	}
 
-	priv->tm_map = devm_regmap_init_mmio(dev, tm_base, &tsens_config);
-	if (IS_ERR(priv->tm_map)) {
-		ret = PTR_ERR(priv->tm_map);
+	if (IS_ERR_OR_NULL(priv->tm_map)) {
+		if (!priv->tm_map)
+			ret = -ENODEV;
+		else
+			ret = PTR_ERR(priv->tm_map);
 		goto err_put_device;
 	}
 
+	/* VER_0 have only tm_map */
+	if (!priv->srot_map)
+		priv->srot_map = priv->tm_map;
+
 	if (tsens_version(priv) > VER_0_1) {
 		for (i = VER_MAJOR; i <= VER_STEP; i++) {
 			priv->rf[i] = devm_regmap_field_alloc(dev, priv->srot_map,
@@ -772,6 +821,10 @@ int __init init_common(struct tsens_priv *priv)
 		ret = PTR_ERR(priv->rf[TSENS_EN]);
 		goto err_put_device;
 	}
+	/* in VER_0 TSENS need to be explicitly enabled */
+	if (tsens_version(priv) == VER_0)
+		regmap_field_write(priv->rf[TSENS_EN], 1);
+
 	ret = regmap_field_read(priv->rf[TSENS_EN], &enabled);
 	if (ret)
 		goto err_put_device;
@@ -794,6 +847,19 @@ int __init init_common(struct tsens_priv *priv)
 		goto err_put_device;
 	}
 
+	priv->rf[TSENS_SW_RST] =
+		devm_regmap_field_alloc(dev, priv->srot_map, priv->fields[TSENS_SW_RST]);
+	if (IS_ERR(priv->rf[TSENS_SW_RST])) {
+		ret = PTR_ERR(priv->rf[TSENS_SW_RST]);
+		goto err_put_device;
+	}
+
+	priv->rf[TRDY] = devm_regmap_field_alloc(dev, priv->tm_map, priv->fields[TRDY]);
+	if (IS_ERR(priv->rf[TRDY])) {
+		ret = PTR_ERR(priv->rf[TRDY]);
+		goto err_put_device;
+	}
+
 	/* This loop might need changes if enum regfield_ids is reordered */
 	for (j = LAST_TEMP_0; j <= UP_THRESH_15; j += 16) {
 		for (i = 0; i < priv->feat->max_sensors; i++) {
@@ -809,7 +875,7 @@ int __init init_common(struct tsens_priv *priv)
 		}
 	}
 
-	if (priv->feat->crit_int) {
+	if (priv->feat->crit_int || tsens_version(priv) < VER_0_1) {
 		/* Loop might need changes if enum regfield_ids is reordered */
 		for (j = CRITICAL_STATUS_0; j <= CRIT_THRESH_15; j += 16) {
 			for (i = 0; i < priv->feat->max_sensors; i++) {
@@ -847,7 +913,11 @@ int __init init_common(struct tsens_priv *priv)
 	}
 
 	spin_lock_init(&priv->ul_lock);
-	tsens_enable_irq(priv);
+
+	/* VER_0 interrupt doesn't need to be enabled */
+	if (tsens_version(priv) >= VER_0_1)
+		tsens_enable_irq(priv);
+
 	tsens_debug_init(op);
 
 err_put_device:
@@ -949,10 +1019,19 @@ static int tsens_register_irq(struct tsens_priv *priv, char *irqname,
 		if (irq == -ENXIO)
 			ret = 0;
 	} else {
-		ret = devm_request_threaded_irq(&pdev->dev, irq,
-						NULL, thread_fn,
-						IRQF_ONESHOT,
-						dev_name(&pdev->dev), priv);
+		/* VER_0 interrupt is TRIGGER_RISING, VER_0_1 and up is ONESHOT */
+		if (tsens_version(priv) == VER_0)
+			ret = devm_request_threaded_irq(&pdev->dev, irq,
+							thread_fn, NULL,
+							IRQF_TRIGGER_RISING,
+							dev_name(&pdev->dev),
+							priv);
+		else
+			ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+							thread_fn, IRQF_ONESHOT,
+							dev_name(&pdev->dev),
+							priv);
+
 		if (ret)
 			dev_err(&pdev->dev, "%s: failed to get irq\n",
 				__func__);
@@ -981,6 +1060,19 @@ static int tsens_register(struct tsens_priv *priv)
 			priv->ops->enable(priv, i);
 	}
 
+	/* VER_0 require to set MIN and MAX THRESH
+	 * These 2 regs are set using the:
+	 * - CRIT_THRESH_0 for MAX THRESH hardcoded to 120°C
+	 * - CRIT_THRESH_1 for MIN THRESH hardcoded to   0°C
+	 */
+	if (tsens_version(priv) < VER_0_1) {
+		regmap_field_write(priv->rf[CRIT_THRESH_0],
+				   tsens_mC_to_hw(priv->sensor, 120000));
+
+		regmap_field_write(priv->rf[CRIT_THRESH_1],
+				   tsens_mC_to_hw(priv->sensor, 0));
+	}
+
 	ret = tsens_register_irq(priv, "uplow", tsens_irq_thread);
 	if (ret < 0)
 		return ret;
diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
index cba64c33b4f9..1471a2c00f15 100644
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -13,6 +13,7 @@
 #define CAL_DEGC_PT2		120
 #define SLOPE_FACTOR		1000
 #define SLOPE_DEFAULT		3200
+#define TIMEOUT_US		100
 #define THRESHOLD_MAX_ADC_CODE	0x3ff
 #define THRESHOLD_MIN_ADC_CODE	0x0
 
@@ -25,7 +26,8 @@ struct tsens_priv;
 
 /* IP version numbers in ascending order */
 enum tsens_ver {
-	VER_0_1 = 0,
+	VER_0 = 0,
+	VER_0_1,
 	VER_1_X,
 	VER_2_X,
 };
-- 
cgit v1.2.3


From fdda131f8fbadee2dfc21f0787d11547b42a961e Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Tue, 20 Apr 2021 20:33:38 +0200
Subject: thermal/drivers/tsens: Use init_common for msm8960

Use init_common and drop custom init for msm8960.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210420183343.2272-5-ansuelsmth@gmail.com
---
 drivers/thermal/qcom/tsens-8960.c | 52 +--------------------------------------
 1 file changed, 1 insertion(+), 51 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c
index 0dd15e812208..83746ee3fc88 100644
--- a/drivers/thermal/qcom/tsens-8960.c
+++ b/drivers/thermal/qcom/tsens-8960.c
@@ -173,56 +173,6 @@ static void disable_8960(struct tsens_priv *priv)
 	regmap_write(priv->tm_map, CNTL_ADDR, reg_cntl);
 }
 
-static int init_8960(struct tsens_priv *priv)
-{
-	int ret, i;
-	u32 reg_cntl;
-
-	priv->tm_map = dev_get_regmap(priv->dev, NULL);
-	if (!priv->tm_map)
-		return -ENODEV;
-
-	/*
-	 * The status registers for each sensor are discontiguous
-	 * because some SoCs have 5 sensors while others have more
-	 * but the control registers stay in the same place, i.e
-	 * directly after the first 5 status registers.
-	 */
-	for (i = 0; i < priv->num_sensors; i++) {
-		if (i >= 5)
-			priv->sensor[i].status = S0_STATUS_OFF + 40;
-		priv->sensor[i].status += i * 4;
-	}
-
-	reg_cntl = SW_RST;
-	ret = regmap_update_bits(priv->tm_map, CNTL_ADDR, SW_RST, reg_cntl);
-	if (ret)
-		return ret;
-
-	if (priv->num_sensors > 1) {
-		reg_cntl |= SLP_CLK_ENA | (MEASURE_PERIOD << 18);
-		reg_cntl &= ~SW_RST;
-		ret = regmap_update_bits(priv->tm_map, CONFIG_ADDR,
-					 CONFIG_MASK, CONFIG);
-	} else {
-		reg_cntl |= SLP_CLK_ENA_8660 | (MEASURE_PERIOD << 16);
-		reg_cntl &= ~CONFIG_MASK_8660;
-		reg_cntl |= CONFIG_8660 << CONFIG_SHIFT_8660;
-	}
-
-	reg_cntl |= GENMASK(priv->num_sensors - 1, 0) << SENSOR0_SHIFT;
-	ret = regmap_write(priv->tm_map, CNTL_ADDR, reg_cntl);
-	if (ret)
-		return ret;
-
-	reg_cntl |= EN;
-	ret = regmap_write(priv->tm_map, CNTL_ADDR, reg_cntl);
-	if (ret)
-		return ret;
-
-	return 0;
-}
-
 static int calibrate_8960(struct tsens_priv *priv)
 {
 	int i;
@@ -338,7 +288,7 @@ static const struct reg_field tsens_8960_regfields[MAX_REGFIELDS] = {
 };
 
 static const struct tsens_ops ops_8960 = {
-	.init		= init_8960,
+	.init		= init_common,
 	.calibrate	= calibrate_8960,
 	.get_temp	= get_temp_8960,
 	.enable		= enable_8960,
-- 
cgit v1.2.3


From 3d08f029fdbbd29c8b363ef4c8c4bfe3b8f79ad0 Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Tue, 20 Apr 2021 20:33:39 +0200
Subject: thermal/drivers/tsens: Fix bug in sensor enable for msm8960

Device based on tsens VER_0 contains a hardware bug that results in some
problem with sensor enablement. Sensor id 6-11 can't be enabled
selectively and all of them must be enabled in one step.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Acked-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210420183343.2272-6-ansuelsmth@gmail.com
---
 drivers/thermal/qcom/tsens-8960.c | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c
index 83746ee3fc88..a96d37c2b674 100644
--- a/drivers/thermal/qcom/tsens-8960.c
+++ b/drivers/thermal/qcom/tsens-8960.c
@@ -27,9 +27,9 @@
 #define EN			BIT(0)
 #define SW_RST			BIT(1)
 #define SENSOR0_EN		BIT(3)
+#define MEASURE_PERIOD		BIT(18)
 #define SLP_CLK_ENA		BIT(26)
 #define SLP_CLK_ENA_8660	BIT(24)
-#define MEASURE_PERIOD		1
 #define SENSOR0_SHIFT		3
 
 /* INT_STATUS_ADDR bitmasks */
@@ -126,17 +126,34 @@ static int resume_8960(struct tsens_priv *priv)
 static int enable_8960(struct tsens_priv *priv, int id)
 {
 	int ret;
-	u32 reg, mask;
+	u32 reg, mask = BIT(id);
 
 	ret = regmap_read(priv->tm_map, CNTL_ADDR, &reg);
 	if (ret)
 		return ret;
 
-	mask = BIT(id + SENSOR0_SHIFT);
+	/* HARDWARE BUG:
+	 * On platforms with more than 6 sensors, all remaining sensors
+	 * must be enabled together, otherwise undefined results are expected.
+	 * (Sensor 6-7 disabled, Sensor 3 disabled...) In the original driver,
+	 * all the sensors are enabled in one step hence this bug is not
+	 * triggered.
+	 */
+	if (id > 5)
+		mask = GENMASK(10, 6);
+
+	mask <<= SENSOR0_SHIFT;
+
+	/* Sensors already enabled. Skip. */
+	if ((reg & mask) == mask)
+		return 0;
+
 	ret = regmap_write(priv->tm_map, CNTL_ADDR, reg | SW_RST);
 	if (ret)
 		return ret;
 
+	reg |= MEASURE_PERIOD;
+
 	if (priv->num_sensors > 1)
 		reg |= mask | SLP_CLK_ENA | EN;
 	else
-- 
cgit v1.2.3


From dfc1193d4dbd6c3cb68c944413146c940bde290a Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Tue, 20 Apr 2021 20:33:40 +0200
Subject: thermal/drivers/tsens: Replace custom 8960 apis with generic apis

Rework calibrate function to use common function. Derive the offset from
a missing hardcoded slope table and the data from the nvmem calib
efuses.
Drop custom get_temp function and use generic api.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Acked-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210420183343.2272-7-ansuelsmth@gmail.com
---
 drivers/thermal/qcom/tsens-8960.c | 56 +++++++++++----------------------------
 1 file changed, 15 insertions(+), 41 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c
index a96d37c2b674..58112f0dfe77 100644
--- a/drivers/thermal/qcom/tsens-8960.c
+++ b/drivers/thermal/qcom/tsens-8960.c
@@ -67,6 +67,13 @@
 #define S9_STATUS_OFF		0x3674
 #define S10_STATUS_OFF		0x3678
 
+/* Original slope - 350 to compensate mC to C inaccuracy */
+static u32 tsens_msm8960_slope[] = {
+			826, 826, 804, 826,
+			761, 782, 782, 849,
+			782, 849, 782
+			};
+
 static int suspend_8960(struct tsens_priv *priv)
 {
 	int ret;
@@ -194,9 +201,7 @@ static int calibrate_8960(struct tsens_priv *priv)
 {
 	int i;
 	char *data;
-
-	ssize_t num_read = priv->num_sensors;
-	struct tsens_sensor *s = priv->sensor;
+	u32 p1[11];
 
 	data = qfprom_read(priv->dev, "calib");
 	if (IS_ERR(data))
@@ -204,49 +209,18 @@ static int calibrate_8960(struct tsens_priv *priv)
 	if (IS_ERR(data))
 		return PTR_ERR(data);
 
-	for (i = 0; i < num_read; i++, s++)
-		s->offset = data[i];
+	for (i = 0; i < priv->num_sensors; i++) {
+		p1[i] = data[i];
+		priv->sensor[i].slope = tsens_msm8960_slope[i];
+	}
+
+	compute_intercept_slope(priv, p1, NULL, ONE_PT_CALIB);
 
 	kfree(data);
 
 	return 0;
 }
 
-/* Temperature on y axis and ADC-code on x-axis */
-static inline int code_to_mdegC(u32 adc_code, const struct tsens_sensor *s)
-{
-	int slope, offset;
-
-	slope = thermal_zone_get_slope(s->tzd);
-	offset = CAL_MDEGC - slope * s->offset;
-
-	return adc_code * slope + offset;
-}
-
-static int get_temp_8960(const struct tsens_sensor *s, int *temp)
-{
-	int ret;
-	u32 code, trdy;
-	struct tsens_priv *priv = s->priv;
-	unsigned long timeout;
-
-	timeout = jiffies + usecs_to_jiffies(TIMEOUT_US);
-	do {
-		ret = regmap_read(priv->tm_map, INT_STATUS_ADDR, &trdy);
-		if (ret)
-			return ret;
-		if (!(trdy & TRDY_MASK))
-			continue;
-		ret = regmap_read(priv->tm_map, s->status, &code);
-		if (ret)
-			return ret;
-		*temp = code_to_mdegC(code, s);
-		return 0;
-	} while (time_before(jiffies, timeout));
-
-	return -ETIMEDOUT;
-}
-
 static const struct reg_field tsens_8960_regfields[MAX_REGFIELDS] = {
 	/* ----- SROT ------ */
 	/* No VERSION information */
@@ -307,7 +281,7 @@ static const struct reg_field tsens_8960_regfields[MAX_REGFIELDS] = {
 static const struct tsens_ops ops_8960 = {
 	.init		= init_common,
 	.calibrate	= calibrate_8960,
-	.get_temp	= get_temp_8960,
+	.get_temp	= get_temp_common,
 	.enable		= enable_8960,
 	.disable	= disable_8960,
 	.suspend	= suspend_8960,
-- 
cgit v1.2.3


From 2ebd0982e6ba69d9f9c02a4a0aab705a5526283e Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Tue, 20 Apr 2021 20:33:41 +0200
Subject: thermal/drivers/tsens: Drop unused define for msm8960

Drop unused define for msm8960 replaced by generic api and reg_field.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210420183343.2272-8-ansuelsmth@gmail.com
---
 drivers/thermal/qcom/tsens-8960.c | 24 +-----------------------
 1 file changed, 1 insertion(+), 23 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c
index 58112f0dfe77..67c1748cdf73 100644
--- a/drivers/thermal/qcom/tsens-8960.c
+++ b/drivers/thermal/qcom/tsens-8960.c
@@ -10,8 +10,6 @@
 #include <linux/thermal.h>
 #include "tsens.h"
 
-#define CAL_MDEGC		30000
-
 #define CONFIG_ADDR		0x3640
 #define CONFIG_ADDR_8660	0x3620
 /* CONFIG_ADDR bitmasks */
@@ -21,39 +19,19 @@
 #define CONFIG_SHIFT_8660	28
 #define CONFIG_MASK_8660	(3 << CONFIG_SHIFT_8660)
 
-#define STATUS_CNTL_ADDR_8064	0x3660
 #define CNTL_ADDR		0x3620
 /* CNTL_ADDR bitmasks */
 #define EN			BIT(0)
 #define SW_RST			BIT(1)
-#define SENSOR0_EN		BIT(3)
+
 #define MEASURE_PERIOD		BIT(18)
 #define SLP_CLK_ENA		BIT(26)
 #define SLP_CLK_ENA_8660	BIT(24)
 #define SENSOR0_SHIFT		3
 
-/* INT_STATUS_ADDR bitmasks */
-#define MIN_STATUS_MASK		BIT(0)
-#define LOWER_STATUS_CLR	BIT(1)
-#define UPPER_STATUS_CLR	BIT(2)
-#define MAX_STATUS_MASK		BIT(3)
-
 #define THRESHOLD_ADDR		0x3624
-/* THRESHOLD_ADDR bitmasks */
-#define THRESHOLD_MAX_LIMIT_SHIFT	24
-#define THRESHOLD_MIN_LIMIT_SHIFT	16
-#define THRESHOLD_UPPER_LIMIT_SHIFT	8
-#define THRESHOLD_LOWER_LIMIT_SHIFT	0
-
-/* Initial temperature threshold values */
-#define LOWER_LIMIT_TH		0x50
-#define UPPER_LIMIT_TH		0xdf
-#define MIN_LIMIT_TH		0x0
-#define MAX_LIMIT_TH		0xff
 
 #define INT_STATUS_ADDR		0x363c
-#define TRDY_MASK		BIT(7)
-#define TIMEOUT_US		100
 
 #define S0_STATUS_OFF		0x3628
 #define S1_STATUS_OFF		0x362c
-- 
cgit v1.2.3


From 6b3aeafbc12c18036809108e301efe8056249233 Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Tue, 20 Apr 2021 20:33:42 +0200
Subject: thermal/drivers/tsens: Add support for ipq8064-tsens

Add support for tsens present in ipq806x SoCs based on generic msm8960
tsens driver.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210420183343.2272-9-ansuelsmth@gmail.com
---
 drivers/thermal/qcom/tsens.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index 83e01cb370f9..4c7ebd1d3f9c 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -968,6 +968,9 @@ static SIMPLE_DEV_PM_OPS(tsens_pm_ops, tsens_suspend, tsens_resume);
 
 static const struct of_device_id tsens_table[] = {
 	{
+		.compatible = "qcom,ipq8064-tsens",
+		.data = &data_8960,
+	}, {
 		.compatible = "qcom,mdm9607-tsens",
 		.data = &data_9607,
 	}, {
-- 
cgit v1.2.3


From b70dbf40eb075c596d86c42d93b86ff502290fc5 Mon Sep 17 00:00:00 2001
From: Lukasz Luba <lukasz.luba@arm.com>
Date: Thu, 22 Apr 2021 12:43:06 +0100
Subject: thermal/core: Create a helper __thermal_cdev_update() without a lock

There is a need to have a helper function which updates cooling device
state from the governors code. With this change governor can use
lock and unlock while calling helper function. This avoid unnecessary
second time lock/unlock which was in previous solution present in
governor implementation. This new helper function must be called
with mutex 'cdev->lock' hold.

The changed been discussed and part of code presented in thread:
https://lore.kernel.org/linux-pm/20210419084536.25000-1-lukasz.luba@arm.com/

Co-developed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://lore.kernel.org/r/20210422114308.29684-2-lukasz.luba@arm.com
---
 drivers/thermal/thermal_core.h    |  1 +
 drivers/thermal/thermal_helpers.c | 27 +++++++++++++++++----------
 2 files changed, 18 insertions(+), 10 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h
index 86b8cef7310e..726e327b4205 100644
--- a/drivers/thermal/thermal_core.h
+++ b/drivers/thermal/thermal_core.h
@@ -66,6 +66,7 @@ static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
 }
 
 void thermal_cdev_update(struct thermal_cooling_device *);
+void __thermal_cdev_update(struct thermal_cooling_device *cdev);
 
 /**
  * struct thermal_trip - representation of a point in temperature domain
diff --git a/drivers/thermal/thermal_helpers.c b/drivers/thermal/thermal_helpers.c
index 7f50f412e02a..3edd047e144f 100644
--- a/drivers/thermal/thermal_helpers.c
+++ b/drivers/thermal/thermal_helpers.c
@@ -192,18 +192,11 @@ static void thermal_cdev_set_cur_state(struct thermal_cooling_device *cdev,
 	thermal_cooling_device_stats_update(cdev, target);
 }
 
-void thermal_cdev_update(struct thermal_cooling_device *cdev)
+void __thermal_cdev_update(struct thermal_cooling_device *cdev)
 {
 	struct thermal_instance *instance;
 	unsigned long target = 0;
 
-	mutex_lock(&cdev->lock);
-	/* cooling device is updated*/
-	if (cdev->updated) {
-		mutex_unlock(&cdev->lock);
-		return;
-	}
-
 	/* Make sure cdev enters the deepest cooling state */
 	list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) {
 		dev_dbg(&cdev->device, "zone%d->target=%lu\n",
@@ -216,11 +209,25 @@ void thermal_cdev_update(struct thermal_cooling_device *cdev)
 
 	thermal_cdev_set_cur_state(cdev, target);
 
-	cdev->updated = true;
-	mutex_unlock(&cdev->lock);
 	trace_cdev_update(cdev, target);
 	dev_dbg(&cdev->device, "set to state %lu\n", target);
 }
+
+/**
+ * thermal_cdev_update - update cooling device state if needed
+ * @cdev:	pointer to struct thermal_cooling_device
+ *
+ * Update the cooling device state if there is a need.
+ */
+void thermal_cdev_update(struct thermal_cooling_device *cdev)
+{
+	mutex_lock(&cdev->lock);
+	if (!cdev->updated) {
+		__thermal_cdev_update(cdev);
+		cdev->updated = true;
+	}
+	mutex_unlock(&cdev->lock);
+}
 EXPORT_SYMBOL(thermal_cdev_update);
 
 /**
-- 
cgit v1.2.3


From d3b60ed9b135e2c652115db691a87dc28b324bea Mon Sep 17 00:00:00 2001
From: Lukasz Luba <lukasz.luba@arm.com>
Date: Thu, 22 Apr 2021 12:43:07 +0100
Subject: thermal/core/power_allocator: Maintain the device statistics from
 going stale

When the temperature is below the first activation trip point the cooling
devices are not checked, so they cannot maintain fresh statistics. It
leads into the situation, when temperature crosses first trip point, the
statistics are stale and show state for very long period. This has impact
on IPA algorithm calculation and wrong decisions. Thus, check the cooling
devices even when the temperature is low, to refresh these statistics.

Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210422114308.29684-3-lukasz.luba@arm.com
---
 drivers/thermal/gov_power_allocator.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'drivers')

diff --git a/drivers/thermal/gov_power_allocator.c b/drivers/thermal/gov_power_allocator.c
index 2802a0e13c88..d393409fb786 100644
--- a/drivers/thermal/gov_power_allocator.c
+++ b/drivers/thermal/gov_power_allocator.c
@@ -575,15 +575,25 @@ static void allow_maximum_power(struct thermal_zone_device *tz)
 {
 	struct thermal_instance *instance;
 	struct power_allocator_params *params = tz->governor_data;
+	u32 req_power;
 
 	mutex_lock(&tz->lock);
 	list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
+		struct thermal_cooling_device *cdev = instance->cdev;
+
 		if ((instance->trip != params->trip_max_desired_temperature) ||
 		    (!cdev_is_power_actor(instance->cdev)))
 			continue;
 
 		instance->target = 0;
 		mutex_lock(&instance->cdev->lock);
+		/*
+		 * Call for updating the cooling devices local stats and avoid
+		 * periods of dozen of seconds when those have not been
+		 * maintained.
+		 */
+		cdev->ops->get_requested_power(cdev, &req_power);
+
 		instance->cdev->updated = false;
 		mutex_unlock(&instance->cdev->lock);
 		thermal_cdev_update(instance->cdev);
-- 
cgit v1.2.3


From 0952177f2a1f63ba87a1940fac21768f402c0b94 Mon Sep 17 00:00:00 2001
From: Lukasz Luba <lukasz.luba@arm.com>
Date: Thu, 22 Apr 2021 12:43:08 +0100
Subject: thermal/core/power_allocator: Update once cooling devices when temp
 is low

The cooling device state change generates an event, also when there is no
need, because temperature is low and device is not throttled. Avoid to
unnecessary update the cooling device which means also not sending event.
The cooling device state has not changed because the temperature is still
below the first activation trip point value, so we can do this.
Add a tracking mechanism to make sure it updates cooling devices only
once - when the temperature dropps below first trip point.

Reported-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210422114308.29684-4-lukasz.luba@arm.com
---
 drivers/thermal/gov_power_allocator.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/gov_power_allocator.c b/drivers/thermal/gov_power_allocator.c
index d393409fb786..a6cdb2e892da 100644
--- a/drivers/thermal/gov_power_allocator.c
+++ b/drivers/thermal/gov_power_allocator.c
@@ -571,7 +571,7 @@ static void reset_pid_controller(struct power_allocator_params *params)
 	params->prev_err = 0;
 }
 
-static void allow_maximum_power(struct thermal_zone_device *tz)
+static void allow_maximum_power(struct thermal_zone_device *tz, bool update)
 {
 	struct thermal_instance *instance;
 	struct power_allocator_params *params = tz->governor_data;
@@ -594,9 +594,10 @@ static void allow_maximum_power(struct thermal_zone_device *tz)
 		 */
 		cdev->ops->get_requested_power(cdev, &req_power);
 
-		instance->cdev->updated = false;
+		if (update)
+			__thermal_cdev_update(instance->cdev);
+
 		mutex_unlock(&instance->cdev->lock);
-		thermal_cdev_update(instance->cdev);
 	}
 	mutex_unlock(&tz->lock);
 }
@@ -710,6 +711,7 @@ static int power_allocator_throttle(struct thermal_zone_device *tz, int trip)
 	int ret;
 	int switch_on_temp, control_temp;
 	struct power_allocator_params *params = tz->governor_data;
+	bool update;
 
 	/*
 	 * We get called for every trip point but we only need to do
@@ -721,9 +723,10 @@ static int power_allocator_throttle(struct thermal_zone_device *tz, int trip)
 	ret = tz->ops->get_trip_temp(tz, params->trip_switch_on,
 				     &switch_on_temp);
 	if (!ret && (tz->temperature < switch_on_temp)) {
+		update = (tz->last_temperature >= switch_on_temp);
 		tz->passive = 0;
 		reset_pid_controller(params);
-		allow_maximum_power(tz);
+		allow_maximum_power(tz, update);
 		return 0;
 	}
 
-- 
cgit v1.2.3


From fef05776eb02238dcad8d5514e666a42572c3f32 Mon Sep 17 00:00:00 2001
From: Lukasz Luba <lukasz.luba@arm.com>
Date: Thu, 22 Apr 2021 16:36:22 +0100
Subject: thermal/core/fair share: Lock the thermal zone while looping over
 instances

The tz->lock must be hold during the looping over the instances in that
thermal zone. This lock was missing in the governor code since the
beginning, so it's hard to point into a particular commit.

CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210422153624.6074-2-lukasz.luba@arm.com
---
 drivers/thermal/gov_fair_share.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'drivers')

diff --git a/drivers/thermal/gov_fair_share.c b/drivers/thermal/gov_fair_share.c
index aaa07180ab48..645432ce6365 100644
--- a/drivers/thermal/gov_fair_share.c
+++ b/drivers/thermal/gov_fair_share.c
@@ -82,6 +82,8 @@ static int fair_share_throttle(struct thermal_zone_device *tz, int trip)
 	int total_instance = 0;
 	int cur_trip_level = get_trip_level(tz);
 
+	mutex_lock(&tz->lock);
+
 	list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
 		if (instance->trip != trip)
 			continue;
@@ -110,6 +112,8 @@ static int fair_share_throttle(struct thermal_zone_device *tz, int trip)
 		mutex_unlock(&instance->cdev->lock);
 		thermal_cdev_update(cdev);
 	}
+
+	mutex_unlock(&tz->lock);
 	return 0;
 }
 
-- 
cgit v1.2.3


From 1a93369810660905f5e89b527cd709fa6832f7c8 Mon Sep 17 00:00:00 2001
From: Lukasz Luba <lukasz.luba@arm.com>
Date: Thu, 22 Apr 2021 16:36:23 +0100
Subject: thermal/core/fair share: Use the lockless __thermal_cdev_update()
 function

Use the new helper function and avoid unnecessery second lock/unlock,
which was present in old approach with thermal_cdev_update().

Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210422153624.6074-3-lukasz.luba@arm.com
---
 drivers/thermal/gov_fair_share.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/gov_fair_share.c b/drivers/thermal/gov_fair_share.c
index 645432ce6365..1e5abf4822be 100644
--- a/drivers/thermal/gov_fair_share.c
+++ b/drivers/thermal/gov_fair_share.c
@@ -107,10 +107,9 @@ static int fair_share_throttle(struct thermal_zone_device *tz, int trip)
 		instance->target = get_target_state(tz, cdev, percentage,
 						    cur_trip_level);
 
-		mutex_lock(&instance->cdev->lock);
-		instance->cdev->updated = false;
-		mutex_unlock(&instance->cdev->lock);
-		thermal_cdev_update(cdev);
+		mutex_lock(&cdev->lock);
+		__thermal_cdev_update(cdev);
+		mutex_unlock(&cdev->lock);
 	}
 
 	mutex_unlock(&tz->lock);
-- 
cgit v1.2.3


From ab39c8853737158604e154ad3b03639e74082bd6 Mon Sep 17 00:00:00 2001
From: Lukasz Luba <lukasz.luba@arm.com>
Date: Thu, 22 Apr 2021 16:36:24 +0100
Subject: thermal/core/power allocator: Use the lockless
 __thermal_cdev_update() function

Use the new helper function and avoid unnecessery second lock/unlock,
which was present in old approach with thermal_cdev_update().

Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210422153624.6074-4-lukasz.luba@arm.com
---
 drivers/thermal/gov_power_allocator.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/gov_power_allocator.c b/drivers/thermal/gov_power_allocator.c
index a6cdb2e892da..13e375751d22 100644
--- a/drivers/thermal/gov_power_allocator.c
+++ b/drivers/thermal/gov_power_allocator.c
@@ -301,9 +301,8 @@ power_actor_set_power(struct thermal_cooling_device *cdev,
 
 	instance->target = clamp_val(state, instance->lower, instance->upper);
 	mutex_lock(&cdev->lock);
-	cdev->updated = false;
+	__thermal_cdev_update(cdev);
 	mutex_unlock(&cdev->lock);
-	thermal_cdev_update(cdev);
 
 	return 0;
 }
-- 
cgit v1.2.3


From c310e546164d5cca4c12faf9582b75989b030b68 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Thu, 22 Apr 2021 13:04:12 +0100
Subject: thermal/drivers/mtk_thermal: Remove redundant initializations of
 several variables

Several variables are being initialized with values that is never
read and being updated later with a new value. The initializations
are redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210422120412.246291-1-colin.king@canonical.com
---
 drivers/thermal/mtk_thermal.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
index 149c6d7fd5a0..97e8678ccf0e 100644
--- a/drivers/thermal/mtk_thermal.c
+++ b/drivers/thermal/mtk_thermal.c
@@ -573,12 +573,12 @@ static int raw_to_mcelsius_v1(struct mtk_thermal *mt, int sensno, s32 raw)
 
 static int raw_to_mcelsius_v2(struct mtk_thermal *mt, int sensno, s32 raw)
 {
-	s32 format_1 = 0;
-	s32 format_2 = 0;
-	s32 g_oe = 1;
-	s32 g_gain = 1;
-	s32 g_x_roomt = 0;
-	s32 tmp = 0;
+	s32 format_1;
+	s32 format_2;
+	s32 g_oe;
+	s32 g_gain;
+	s32 g_x_roomt;
+	s32 tmp;
 
 	if (raw == 0)
 		return 0;
-- 
cgit v1.2.3


From 9af1fba33b5751d71c0e6727a875b9fd7d8a99de Mon Sep 17 00:00:00 2001
From: Clemens Gruber <clemens.gruber@pqgruber.com>
Date: Thu, 15 Apr 2021 14:14:48 +0200
Subject: pwm: pca9685: Switch to atomic API
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The switch to the atomic API goes hand in hand with a few fixes to
previously experienced issues:
- The duty cycle is no longer lost after disable/enable (previously the
  OFF registers were cleared in disable and the user was required to
  call config to restore the duty cycle settings)
- If one sets a period resulting in the same prescale register value,
  the sleep and write to the register is now skipped
- Previously, only the full ON bit was toggled in GPIO mode (and full
  OFF cleared if set to high), which could result in both full OFF and
  full ON not being set and on=0, off=0, which is not allowed according
  to the datasheet
- The OFF registers were reset to 0 in probe, which could lead to the
  forbidden on=0, off=0. Fixed by resetting to POR default (full OFF)

Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-pca9685.c | 261 ++++++++++++++++------------------------------
 1 file changed, 91 insertions(+), 170 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-pca9685.c b/drivers/pwm/pwm-pca9685.c
index 00976b2c57b2..b740b824bda9 100644
--- a/drivers/pwm/pwm-pca9685.c
+++ b/drivers/pwm/pwm-pca9685.c
@@ -51,7 +51,6 @@
 #define PCA9685_PRESCALE_MAX	0xFF	/* => min. frequency of 24 Hz */
 
 #define PCA9685_COUNTER_RANGE	4096
-#define PCA9685_DEFAULT_PERIOD	5000000	/* Default period_ns = 1/200 Hz */
 #define PCA9685_OSC_CLOCK_MHZ	25	/* Internal oscillator with 25 MHz */
 
 #define PCA9685_NUMREGS		0xFF
@@ -71,10 +70,14 @@
 #define LED_N_OFF_H(N)	(PCA9685_LEDX_OFF_H + (4 * (N)))
 #define LED_N_OFF_L(N)	(PCA9685_LEDX_OFF_L + (4 * (N)))
 
+#define REG_ON_H(C)	((C) >= PCA9685_MAXCHAN ? PCA9685_ALL_LED_ON_H : LED_N_ON_H((C)))
+#define REG_ON_L(C)	((C) >= PCA9685_MAXCHAN ? PCA9685_ALL_LED_ON_L : LED_N_ON_L((C)))
+#define REG_OFF_H(C)	((C) >= PCA9685_MAXCHAN ? PCA9685_ALL_LED_OFF_H : LED_N_OFF_H((C)))
+#define REG_OFF_L(C)	((C) >= PCA9685_MAXCHAN ? PCA9685_ALL_LED_OFF_L : LED_N_OFF_L((C)))
+
 struct pca9685 {
 	struct pwm_chip chip;
 	struct regmap *regmap;
-	int period_ns;
 #if IS_ENABLED(CONFIG_GPIOLIB)
 	struct mutex lock;
 	struct gpio_chip gpio;
@@ -87,6 +90,53 @@ static inline struct pca9685 *to_pca(struct pwm_chip *chip)
 	return container_of(chip, struct pca9685, chip);
 }
 
+/* Helper function to set the duty cycle ratio to duty/4096 (e.g. duty=2048 -> 50%) */
+static void pca9685_pwm_set_duty(struct pca9685 *pca, int channel, unsigned int duty)
+{
+	if (duty == 0) {
+		/* Set the full OFF bit, which has the highest precedence */
+		regmap_write(pca->regmap, REG_OFF_H(channel), LED_FULL);
+	} else if (duty >= PCA9685_COUNTER_RANGE) {
+		/* Set the full ON bit and clear the full OFF bit */
+		regmap_write(pca->regmap, REG_ON_H(channel), LED_FULL);
+		regmap_write(pca->regmap, REG_OFF_H(channel), 0);
+	} else {
+		/* Set OFF time (clears the full OFF bit) */
+		regmap_write(pca->regmap, REG_OFF_L(channel), duty & 0xff);
+		regmap_write(pca->regmap, REG_OFF_H(channel), (duty >> 8) & 0xf);
+		/* Clear the full ON bit */
+		regmap_write(pca->regmap, REG_ON_H(channel), 0);
+	}
+}
+
+static unsigned int pca9685_pwm_get_duty(struct pca9685 *pca, int channel)
+{
+	unsigned int off_h = 0, val = 0;
+
+	if (WARN_ON(channel >= PCA9685_MAXCHAN)) {
+		/* HW does not support reading state of "all LEDs" channel */
+		return 0;
+	}
+
+	regmap_read(pca->regmap, LED_N_OFF_H(channel), &off_h);
+	if (off_h & LED_FULL) {
+		/* Full OFF bit is set */
+		return 0;
+	}
+
+	regmap_read(pca->regmap, LED_N_ON_H(channel), &val);
+	if (val & LED_FULL) {
+		/* Full ON bit is set */
+		return PCA9685_COUNTER_RANGE;
+	}
+
+	if (regmap_read(pca->regmap, LED_N_OFF_L(channel), &val)) {
+		/* Reset val to 0 in case reading LED_N_OFF_L failed */
+		val = 0;
+	}
+	return ((off_h & 0xf) << 8) | (val & 0xff);
+}
+
 #if IS_ENABLED(CONFIG_GPIOLIB)
 static bool pca9685_pwm_test_and_set_inuse(struct pca9685 *pca, int pwm_idx)
 {
@@ -138,34 +188,23 @@ static int pca9685_pwm_gpio_request(struct gpio_chip *gpio, unsigned int offset)
 static int pca9685_pwm_gpio_get(struct gpio_chip *gpio, unsigned int offset)
 {
 	struct pca9685 *pca = gpiochip_get_data(gpio);
-	struct pwm_device *pwm = &pca->chip.pwms[offset];
-	unsigned int value;
 
-	regmap_read(pca->regmap, LED_N_ON_H(pwm->hwpwm), &value);
-
-	return value & LED_FULL;
+	return pca9685_pwm_get_duty(pca, offset) != 0;
 }
 
 static void pca9685_pwm_gpio_set(struct gpio_chip *gpio, unsigned int offset,
 				 int value)
 {
 	struct pca9685 *pca = gpiochip_get_data(gpio);
-	struct pwm_device *pwm = &pca->chip.pwms[offset];
-	unsigned int on = value ? LED_FULL : 0;
-
-	/* Clear both OFF registers */
-	regmap_write(pca->regmap, LED_N_OFF_L(pwm->hwpwm), 0);
-	regmap_write(pca->regmap, LED_N_OFF_H(pwm->hwpwm), 0);
 
-	/* Set the full ON bit */
-	regmap_write(pca->regmap, LED_N_ON_H(pwm->hwpwm), on);
+	pca9685_pwm_set_duty(pca, offset, value ? PCA9685_COUNTER_RANGE : 0);
 }
 
 static void pca9685_pwm_gpio_free(struct gpio_chip *gpio, unsigned int offset)
 {
 	struct pca9685 *pca = gpiochip_get_data(gpio);
 
-	pca9685_pwm_gpio_set(gpio, offset, 0);
+	pca9685_pwm_set_duty(pca, offset, 0);
 	pm_runtime_put(pca->chip.dev);
 	pca9685_pwm_clear_inuse(pca, offset);
 }
@@ -246,167 +285,52 @@ static void pca9685_set_sleep_mode(struct pca9685 *pca, bool enable)
 	}
 }
 
-static int pca9685_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
-			      int duty_ns, int period_ns)
+static int pca9685_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+			     const struct pwm_state *state)
 {
 	struct pca9685 *pca = to_pca(chip);
-	unsigned long long duty;
-	unsigned int reg;
-	int prescale;
-
-	if (period_ns != pca->period_ns) {
-		prescale = DIV_ROUND_CLOSEST(PCA9685_OSC_CLOCK_MHZ * period_ns,
-					     PCA9685_COUNTER_RANGE * 1000) - 1;
-
-		if (prescale >= PCA9685_PRESCALE_MIN &&
-			prescale <= PCA9685_PRESCALE_MAX) {
-			/*
-			 * Putting the chip briefly into SLEEP mode
-			 * at this point won't interfere with the
-			 * pm_runtime framework, because the pm_runtime
-			 * state is guaranteed active here.
-			 */
-			/* Put chip into sleep mode */
-			pca9685_set_sleep_mode(pca, true);
-
-			/* Change the chip-wide output frequency */
-			regmap_write(pca->regmap, PCA9685_PRESCALE, prescale);
-
-			/* Wake the chip up */
-			pca9685_set_sleep_mode(pca, false);
-
-			pca->period_ns = period_ns;
-		} else {
-			dev_err(chip->dev,
-				"prescaler not set: period out of bounds!\n");
-			return -EINVAL;
-		}
-	}
+	unsigned long long duty, prescale;
+	unsigned int val = 0;
 
-	if (duty_ns < 1) {
-		if (pwm->hwpwm >= PCA9685_MAXCHAN)
-			reg = PCA9685_ALL_LED_OFF_H;
-		else
-			reg = LED_N_OFF_H(pwm->hwpwm);
+	if (state->polarity != PWM_POLARITY_NORMAL)
+		return -EINVAL;
 
-		regmap_write(pca->regmap, reg, LED_FULL);
-
-		return 0;
+	prescale = DIV_ROUND_CLOSEST_ULL(PCA9685_OSC_CLOCK_MHZ * state->period,
+					 PCA9685_COUNTER_RANGE * 1000) - 1;
+	if (prescale < PCA9685_PRESCALE_MIN || prescale > PCA9685_PRESCALE_MAX) {
+		dev_err(chip->dev, "pwm not changed: period out of bounds!\n");
+		return -EINVAL;
 	}
 
-	if (duty_ns == period_ns) {
-		/* Clear both OFF registers */
-		if (pwm->hwpwm >= PCA9685_MAXCHAN)
-			reg = PCA9685_ALL_LED_OFF_L;
-		else
-			reg = LED_N_OFF_L(pwm->hwpwm);
-
-		regmap_write(pca->regmap, reg, 0x0);
-
-		if (pwm->hwpwm >= PCA9685_MAXCHAN)
-			reg = PCA9685_ALL_LED_OFF_H;
-		else
-			reg = LED_N_OFF_H(pwm->hwpwm);
-
-		regmap_write(pca->regmap, reg, 0x0);
-
-		/* Set the full ON bit */
-		if (pwm->hwpwm >= PCA9685_MAXCHAN)
-			reg = PCA9685_ALL_LED_ON_H;
-		else
-			reg = LED_N_ON_H(pwm->hwpwm);
-
-		regmap_write(pca->regmap, reg, LED_FULL);
-
+	if (!state->enabled) {
+		pca9685_pwm_set_duty(pca, pwm->hwpwm, 0);
 		return 0;
 	}
 
-	duty = PCA9685_COUNTER_RANGE * (unsigned long long)duty_ns;
-	duty = DIV_ROUND_UP_ULL(duty, period_ns);
-
-	if (pwm->hwpwm >= PCA9685_MAXCHAN)
-		reg = PCA9685_ALL_LED_OFF_L;
-	else
-		reg = LED_N_OFF_L(pwm->hwpwm);
-
-	regmap_write(pca->regmap, reg, (int)duty & 0xff);
-
-	if (pwm->hwpwm >= PCA9685_MAXCHAN)
-		reg = PCA9685_ALL_LED_OFF_H;
-	else
-		reg = LED_N_OFF_H(pwm->hwpwm);
-
-	regmap_write(pca->regmap, reg, ((int)duty >> 8) & 0xf);
-
-	/* Clear the full ON bit, otherwise the set OFF time has no effect */
-	if (pwm->hwpwm >= PCA9685_MAXCHAN)
-		reg = PCA9685_ALL_LED_ON_H;
-	else
-		reg = LED_N_ON_H(pwm->hwpwm);
-
-	regmap_write(pca->regmap, reg, 0);
-
-	return 0;
-}
-
-static int pca9685_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
-{
-	struct pca9685 *pca = to_pca(chip);
-	unsigned int reg;
-
-	/*
-	 * The PWM subsystem does not support a pre-delay.
-	 * So, set the ON-timeout to 0
-	 */
-	if (pwm->hwpwm >= PCA9685_MAXCHAN)
-		reg = PCA9685_ALL_LED_ON_L;
-	else
-		reg = LED_N_ON_L(pwm->hwpwm);
-
-	regmap_write(pca->regmap, reg, 0);
-
-	if (pwm->hwpwm >= PCA9685_MAXCHAN)
-		reg = PCA9685_ALL_LED_ON_H;
-	else
-		reg = LED_N_ON_H(pwm->hwpwm);
+	regmap_read(pca->regmap, PCA9685_PRESCALE, &val);
+	if (prescale != val) {
+		/*
+		 * Putting the chip briefly into SLEEP mode
+		 * at this point won't interfere with the
+		 * pm_runtime framework, because the pm_runtime
+		 * state is guaranteed active here.
+		 */
+		/* Put chip into sleep mode */
+		pca9685_set_sleep_mode(pca, true);
 
-	regmap_write(pca->regmap, reg, 0);
+		/* Change the chip-wide output frequency */
+		regmap_write(pca->regmap, PCA9685_PRESCALE, prescale);
 
-	/*
-	 * Clear the full-off bit.
-	 * It has precedence over the others and must be off.
-	 */
-	if (pwm->hwpwm >= PCA9685_MAXCHAN)
-		reg = PCA9685_ALL_LED_OFF_H;
-	else
-		reg = LED_N_OFF_H(pwm->hwpwm);
-
-	regmap_update_bits(pca->regmap, reg, LED_FULL, 0x0);
+		/* Wake the chip up */
+		pca9685_set_sleep_mode(pca, false);
+	}
 
+	duty = PCA9685_COUNTER_RANGE * state->duty_cycle;
+	duty = DIV_ROUND_UP_ULL(duty, state->period);
+	pca9685_pwm_set_duty(pca, pwm->hwpwm, duty);
 	return 0;
 }
 
-static void pca9685_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
-{
-	struct pca9685 *pca = to_pca(chip);
-	unsigned int reg;
-
-	if (pwm->hwpwm >= PCA9685_MAXCHAN)
-		reg = PCA9685_ALL_LED_OFF_H;
-	else
-		reg = LED_N_OFF_H(pwm->hwpwm);
-
-	regmap_write(pca->regmap, reg, LED_FULL);
-
-	/* Clear the LED_OFF counter. */
-	if (pwm->hwpwm >= PCA9685_MAXCHAN)
-		reg = PCA9685_ALL_LED_OFF_L;
-	else
-		reg = LED_N_OFF_L(pwm->hwpwm);
-
-	regmap_write(pca->regmap, reg, 0x0);
-}
-
 static int pca9685_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
 {
 	struct pca9685 *pca = to_pca(chip);
@@ -422,15 +346,13 @@ static void pca9685_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)
 {
 	struct pca9685 *pca = to_pca(chip);
 
-	pca9685_pwm_disable(chip, pwm);
+	pca9685_pwm_set_duty(pca, pwm->hwpwm, 0);
 	pm_runtime_put(chip->dev);
 	pca9685_pwm_clear_inuse(pca, pwm->hwpwm);
 }
 
 static const struct pwm_ops pca9685_pwm_ops = {
-	.enable = pca9685_pwm_enable,
-	.disable = pca9685_pwm_disable,
-	.config = pca9685_pwm_config,
+	.apply = pca9685_pwm_apply,
 	.request = pca9685_pwm_request,
 	.free = pca9685_pwm_free,
 	.owner = THIS_MODULE,
@@ -461,7 +383,6 @@ static int pca9685_pwm_probe(struct i2c_client *client,
 			ret);
 		return ret;
 	}
-	pca->period_ns = PCA9685_DEFAULT_PERIOD;
 
 	i2c_set_clientdata(client, pca);
 
@@ -484,9 +405,9 @@ static int pca9685_pwm_probe(struct i2c_client *client,
 	reg &= ~(MODE1_ALLCALL | MODE1_SUB1 | MODE1_SUB2 | MODE1_SUB3);
 	regmap_write(pca->regmap, PCA9685_MODE1, reg);
 
-	/* Clear all "full off" bits */
-	regmap_write(pca->regmap, PCA9685_ALL_LED_OFF_L, 0);
-	regmap_write(pca->regmap, PCA9685_ALL_LED_OFF_H, 0);
+	/* Reset OFF registers to POR default */
+	regmap_write(pca->regmap, PCA9685_ALL_LED_OFF_L, LED_FULL);
+	regmap_write(pca->regmap, PCA9685_ALL_LED_OFF_H, LED_FULL);
 
 	pca->chip.ops = &pca9685_pwm_ops;
 	/* Add an extra channel for ALL_LED */
-- 
cgit v1.2.3


From 8f4768a56b673cbff3f24cf7b1784852c0f572d1 Mon Sep 17 00:00:00 2001
From: Clemens Gruber <clemens.gruber@pqgruber.com>
Date: Thu, 15 Apr 2021 14:14:49 +0200
Subject: pwm: pca9685: Support hardware readout
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Implement .get_state to read-out the current hardware state.

The hardware readout may return slightly different values than those
that were set in apply due to the limited range of possible prescale and
counter register values.

Also note that although the datasheet mentions 200 Hz as default
frequency when using the internal 25 MHz oscillator, the calculated
period from the default prescaler register setting of 30 is 5079040ns.

Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-pca9685.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-pca9685.c b/drivers/pwm/pwm-pca9685.c
index b740b824bda9..5db62e5af518 100644
--- a/drivers/pwm/pwm-pca9685.c
+++ b/drivers/pwm/pwm-pca9685.c
@@ -331,6 +331,41 @@ static int pca9685_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 	return 0;
 }
 
+static void pca9685_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
+				  struct pwm_state *state)
+{
+	struct pca9685 *pca = to_pca(chip);
+	unsigned long long duty;
+	unsigned int val = 0;
+
+	/* Calculate (chip-wide) period from prescale value */
+	regmap_read(pca->regmap, PCA9685_PRESCALE, &val);
+	/*
+	 * PCA9685_OSC_CLOCK_MHZ is 25, i.e. an integer divider of 1000.
+	 * The following calculation is therefore only a multiplication
+	 * and we are not losing precision.
+	 */
+	state->period = (PCA9685_COUNTER_RANGE * 1000 / PCA9685_OSC_CLOCK_MHZ) *
+			(val + 1);
+
+	/* The (per-channel) polarity is fixed */
+	state->polarity = PWM_POLARITY_NORMAL;
+
+	if (pwm->hwpwm >= PCA9685_MAXCHAN) {
+		/*
+		 * The "all LEDs" channel does not support HW readout
+		 * Return 0 and disabled for backwards compatibility
+		 */
+		state->duty_cycle = 0;
+		state->enabled = false;
+		return;
+	}
+
+	state->enabled = true;
+	duty = pca9685_pwm_get_duty(pca, pwm->hwpwm);
+	state->duty_cycle = DIV_ROUND_DOWN_ULL(duty * state->period, PCA9685_COUNTER_RANGE);
+}
+
 static int pca9685_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
 {
 	struct pca9685 *pca = to_pca(chip);
@@ -353,6 +388,7 @@ static void pca9685_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)
 
 static const struct pwm_ops pca9685_pwm_ops = {
 	.apply = pca9685_pwm_apply,
+	.get_state = pca9685_pwm_get_state,
 	.request = pca9685_pwm_request,
 	.free = pca9685_pwm_free,
 	.owner = THIS_MODULE,
-- 
cgit v1.2.3


From 9e6fd830abcae958f3a3465e511a6e5600a005f5 Mon Sep 17 00:00:00 2001
From: Clemens Gruber <clemens.gruber@pqgruber.com>
Date: Thu, 15 Apr 2021 14:14:50 +0200
Subject: pwm: pca9685: Improve runtime PM behavior

The chip does not come out of POR in active state but in sleep state.
To be sure (in case the bootloader woke it up) we force it to sleep in
probe.

If runtime PM is disabled, we instead wake the chip in .probe and put it
to sleep in .remove.

Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-pca9685.c | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-pca9685.c b/drivers/pwm/pwm-pca9685.c
index 5db62e5af518..7c9f174de64e 100644
--- a/drivers/pwm/pwm-pca9685.c
+++ b/drivers/pwm/pwm-pca9685.c
@@ -461,14 +461,20 @@ static int pca9685_pwm_probe(struct i2c_client *client,
 		return ret;
 	}
 
-	/* The chip comes out of power-up in the active state */
-	pm_runtime_set_active(&client->dev);
-	/*
-	 * Enable will put the chip into suspend, which is what we
-	 * want as all outputs are disabled at this point
-	 */
 	pm_runtime_enable(&client->dev);
 
+	if (pm_runtime_enabled(&client->dev)) {
+		/*
+		 * Although the chip comes out of power-up in the sleep state,
+		 * we force it to sleep in case it was woken up before
+		 */
+		pca9685_set_sleep_mode(pca, true);
+		pm_runtime_set_suspended(&client->dev);
+	} else {
+		/* Wake the chip up if runtime PM is disabled */
+		pca9685_set_sleep_mode(pca, false);
+	}
+
 	return 0;
 }
 
@@ -480,7 +486,14 @@ static int pca9685_pwm_remove(struct i2c_client *client)
 	ret = pwmchip_remove(&pca->chip);
 	if (ret)
 		return ret;
+
+	if (!pm_runtime_enabled(&client->dev)) {
+		/* Put chip in sleep state if runtime PM is disabled */
+		pca9685_set_sleep_mode(pca, true);
+	}
+
 	pm_runtime_disable(&client->dev);
+
 	return 0;
 }
 
-- 
cgit v1.2.3


From 0b638f5032849d701167764de38df80cbf825cc6 Mon Sep 17 00:00:00 2001
From: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Date: Thu, 15 Apr 2021 16:35:53 +0800
Subject: pwm: mediatek: Remove unused function
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fix the following clang warning:

drivers/pwm/pwm-mediatek.c:110:19: warning: unused function
'pwm_mediatek_readl' [-Wunused-function].

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-mediatek.c | 6 ------
 1 file changed, 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-mediatek.c b/drivers/pwm/pwm-mediatek.c
index 87fb37d43814..b4a31060bcd7 100644
--- a/drivers/pwm/pwm-mediatek.c
+++ b/drivers/pwm/pwm-mediatek.c
@@ -107,12 +107,6 @@ static void pwm_mediatek_clk_disable(struct pwm_chip *chip,
 	clk_disable_unprepare(pc->clk_top);
 }
 
-static inline u32 pwm_mediatek_readl(struct pwm_mediatek_chip *chip,
-				     unsigned int num, unsigned int offset)
-{
-	return readl(chip->regs + pwm_mediatek_reg_offset[num] + offset);
-}
-
 static inline void pwm_mediatek_writel(struct pwm_mediatek_chip *chip,
 				       unsigned int num, unsigned int offset,
 				       u32 value)
-- 
cgit v1.2.3


From 1ecd5b129252249b9bc03d7645a7bda512747277 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Wed, 21 Apr 2021 17:43:16 +0100
Subject: ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe
 failure

When failing the driver probe because of invalid firmware properties,
the GTDT driver unmaps the interrupt that it mapped earlier.

However, it never checks whether the mapping of the interrupt actially
succeeded. Even more, should the firmware report an illegal interrupt
number that overlaps with the GIC SGI range, this can result in an
IPI being unmapped, and subsequent fireworks (as reported by Dann
Frazier).

Rework the driver to have a slightly saner behaviour and actually
check whether the interrupt has been mapped before unmapping things.

Reported-by: dann frazier <dann.frazier@canonical.com>
Fixes: ca9ae5ec4ef0 ("acpi/arm64: Add SBSA Generic Watchdog support in GTDT driver")
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/YH87dtTfwYgavusz@xps13.dannf
Cc: <stable@vger.kernel.org>
Cc: Fu Wei <wefu@redhat.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: dann frazier <dann.frazier@canonical.com>
Tested-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Link: https://lore.kernel.org/r/20210421164317.1718831-2-maz@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 drivers/acpi/arm64/gtdt.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/acpi/arm64/gtdt.c b/drivers/acpi/arm64/gtdt.c
index f2d0e5915dab..0a0a982f9c28 100644
--- a/drivers/acpi/arm64/gtdt.c
+++ b/drivers/acpi/arm64/gtdt.c
@@ -329,7 +329,7 @@ static int __init gtdt_import_sbsa_gwdt(struct acpi_gtdt_watchdog *wd,
 					int index)
 {
 	struct platform_device *pdev;
-	int irq = map_gt_gsi(wd->timer_interrupt, wd->timer_flags);
+	int irq;
 
 	/*
 	 * According to SBSA specification the size of refresh and control
@@ -338,7 +338,7 @@ static int __init gtdt_import_sbsa_gwdt(struct acpi_gtdt_watchdog *wd,
 	struct resource res[] = {
 		DEFINE_RES_MEM(wd->control_frame_address, SZ_4K),
 		DEFINE_RES_MEM(wd->refresh_frame_address, SZ_4K),
-		DEFINE_RES_IRQ(irq),
+		{},
 	};
 	int nr_res = ARRAY_SIZE(res);
 
@@ -348,10 +348,11 @@ static int __init gtdt_import_sbsa_gwdt(struct acpi_gtdt_watchdog *wd,
 
 	if (!(wd->refresh_frame_address && wd->control_frame_address)) {
 		pr_err(FW_BUG "failed to get the Watchdog base address.\n");
-		acpi_unregister_gsi(wd->timer_interrupt);
 		return -EINVAL;
 	}
 
+	irq = map_gt_gsi(wd->timer_interrupt, wd->timer_flags);
+	res[2] = (struct resource)DEFINE_RES_IRQ(irq);
 	if (irq <= 0) {
 		pr_warn("failed to map the Watchdog interrupt.\n");
 		nr_res--;
@@ -364,7 +365,8 @@ static int __init gtdt_import_sbsa_gwdt(struct acpi_gtdt_watchdog *wd,
 	 */
 	pdev = platform_device_register_simple("sbsa-gwdt", index, res, nr_res);
 	if (IS_ERR(pdev)) {
-		acpi_unregister_gsi(wd->timer_interrupt);
+		if (irq > 0)
+			acpi_unregister_gsi(wd->timer_interrupt);
 		return PTR_ERR(pdev);
 	}
 
-- 
cgit v1.2.3


From 2a20b08f06e70860272bc7f52b5423c1b2f06696 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Wed, 21 Apr 2021 17:43:17 +0100
Subject: ACPI: irq: Prevent unregistering of GIC SGIs

When using ACPI on arm64, which implies the GIC IRQ model, no
table should ever provide a GSI number in the range [0:15],
as these are reserved for IPIs.

However, drivers tend to call acpi_unregister_gsi() with any
random GSI number provided by half baked tables, which results
in an exploding kernel when its IPIs have been unconfigured.

In order to catch this, check for the silly case early, warn
that something is going wrong and avoid the above disaster.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: dann frazier <dann.frazier@canonical.com>
Tested-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Link: https://lore.kernel.org/r/20210421164317.1718831-3-maz@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 drivers/acpi/irq.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/acpi/irq.c b/drivers/acpi/irq.c
index e209081d644b..c68e694fca26 100644
--- a/drivers/acpi/irq.c
+++ b/drivers/acpi/irq.c
@@ -75,8 +75,12 @@ void acpi_unregister_gsi(u32 gsi)
 {
 	struct irq_domain *d = irq_find_matching_fwnode(acpi_gsi_domain_id,
 							DOMAIN_BUS_ANY);
-	int irq = irq_find_mapping(d, gsi);
+	int irq;
 
+	if (WARN_ON(acpi_irq_model == ACPI_IRQ_MODEL_GIC && gsi < 16))
+		return;
+
+	irq = irq_find_mapping(d, gsi);
 	irq_dispose_mapping(irq);
 }
 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
-- 
cgit v1.2.3


From 721b595744f199c185fbcefaa6e7e5cea9da1941 Mon Sep 17 00:00:00 2001
From: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
Date: Mon, 19 Apr 2021 09:00:07 +0900
Subject: pwm: visconti: Add Toshiba Visconti SoC PWM support
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Add driver for the PWM controller on Toshiba Visconti ARM SoC.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
[thierry.reding@gmail.com: fix up a couple of checkpatch warnings]
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/Kconfig        |   9 +++
 drivers/pwm/Makefile       |   1 +
 drivers/pwm/pwm-visconti.c | 190 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 200 insertions(+)
 create mode 100644 drivers/pwm/pwm-visconti.c

(limited to 'drivers')

diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
index 9a4f66ae8070..8ae68d6203fb 100644
--- a/drivers/pwm/Kconfig
+++ b/drivers/pwm/Kconfig
@@ -601,6 +601,15 @@ config PWM_TWL_LED
 	  To compile this driver as a module, choose M here: the module
 	  will be called pwm-twl-led.
 
+config PWM_VISCONTI
+	tristate "Toshiba Visconti PWM support"
+	depends on ARCH_VISCONTI || COMPILE_TEST
+	help
+	  PWM Subsystem driver support for Toshiba Visconti SoCs.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called pwm-visconti.
+
 config PWM_VT8500
 	tristate "vt8500 PWM support"
 	depends on ARCH_VT8500 || COMPILE_TEST
diff --git a/drivers/pwm/Makefile b/drivers/pwm/Makefile
index 6374d3b1d6f3..d43b1e17e8e1 100644
--- a/drivers/pwm/Makefile
+++ b/drivers/pwm/Makefile
@@ -56,4 +56,5 @@ obj-$(CONFIG_PWM_TIECAP)	+= pwm-tiecap.o
 obj-$(CONFIG_PWM_TIEHRPWM)	+= pwm-tiehrpwm.o
 obj-$(CONFIG_PWM_TWL)		+= pwm-twl.o
 obj-$(CONFIG_PWM_TWL_LED)	+= pwm-twl-led.o
+obj-$(CONFIG_PWM_VISCONTI)	+= pwm-visconti.o
 obj-$(CONFIG_PWM_VT8500)	+= pwm-vt8500.o
diff --git a/drivers/pwm/pwm-visconti.c b/drivers/pwm/pwm-visconti.c
new file mode 100644
index 000000000000..46d903786366
--- /dev/null
+++ b/drivers/pwm/pwm-visconti.c
@@ -0,0 +1,190 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Toshiba Visconti pulse-width-modulation controller driver
+ *
+ * Copyright (c) 2020 - 2021 TOSHIBA CORPORATION
+ * Copyright (c) 2020 - 2021 Toshiba Electronic Devices & Storage Corporation
+ *
+ * Authors: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
+ *
+ * Limitations:
+ * - The fixed input clock is running at 1 MHz and is divided by either 1,
+ *   2, 4 or 8.
+ * - When the settings of the PWM are modified, the new values are shadowed
+ *   in hardware until the PIPGM_PCSR register is written and the currently
+ *   running period is completed. This way the hardware switches atomically
+ *   from the old setting to the new.
+ * - Disabling the hardware completes the currently running period and keeps
+ *   the output at low level at all times.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pwm.h>
+
+#define PIPGM_PCSR(ch) (0x400 + 4 * (ch))
+#define PIPGM_PDUT(ch) (0x420 + 4 * (ch))
+#define PIPGM_PWMC(ch) (0x440 + 4 * (ch))
+
+#define PIPGM_PWMC_PWMACT		BIT(5)
+#define PIPGM_PWMC_CLK_MASK		GENMASK(1, 0)
+#define PIPGM_PWMC_POLARITY_MASK	GENMASK(5, 5)
+
+struct visconti_pwm_chip {
+	struct pwm_chip chip;
+	void __iomem *base;
+};
+
+static inline struct visconti_pwm_chip *visconti_pwm_from_chip(struct pwm_chip *chip)
+{
+	return container_of(chip, struct visconti_pwm_chip, chip);
+}
+
+static int visconti_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+			      const struct pwm_state *state)
+{
+	struct visconti_pwm_chip *priv = visconti_pwm_from_chip(chip);
+	u32 period, duty_cycle, pwmc0;
+
+	if (!state->enabled) {
+		writel(0, priv->base + PIPGM_PCSR(pwm->hwpwm));
+		return 0;
+	}
+
+	/*
+	 * The biggest period the hardware can provide is
+	 *	(0xffff << 3) * 1000 ns
+	 * This value fits easily in an u32, so simplify the maths by
+	 * capping the values to 32 bit integers.
+	 */
+	if (state->period > (0xffff << 3) * 1000)
+		period = (0xffff << 3) * 1000;
+	else
+		period = state->period;
+
+	if (state->duty_cycle > period)
+		duty_cycle = period;
+	else
+		duty_cycle = state->duty_cycle;
+
+	/*
+	 * The input clock runs fixed at 1 MHz, so we have only
+	 * microsecond resolution and so can divide by
+	 * NSEC_PER_SEC / CLKFREQ = 1000 without losing precision.
+	 */
+	period /= 1000;
+	duty_cycle /= 1000;
+
+	if (!period)
+		return -ERANGE;
+
+	/*
+	 * PWMC controls a divider that divides the input clk by a
+	 * power of two between 1 and 8. As a smaller divider yields
+	 * higher precision, pick the smallest possible one.
+	 */
+	if (period > 0xffff) {
+		pwmc0 = ilog2(period >> 16);
+		if (WARN_ON(pwmc0 > 3))
+			return -EINVAL;
+	} else {
+		pwmc0 = 0;
+	}
+
+	period >>= pwmc0;
+	duty_cycle >>= pwmc0;
+
+	if (state->polarity == PWM_POLARITY_INVERSED)
+		pwmc0 |= PIPGM_PWMC_PWMACT;
+	writel(pwmc0, priv->base + PIPGM_PWMC(pwm->hwpwm));
+	writel(duty_cycle, priv->base + PIPGM_PDUT(pwm->hwpwm));
+	writel(period, priv->base + PIPGM_PCSR(pwm->hwpwm));
+
+	return 0;
+}
+
+static void visconti_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
+				   struct pwm_state *state)
+{
+	struct visconti_pwm_chip *priv = visconti_pwm_from_chip(chip);
+	u32 period, duty, pwmc0, pwmc0_clk;
+
+	period = readl(priv->base + PIPGM_PCSR(pwm->hwpwm));
+	duty = readl(priv->base + PIPGM_PDUT(pwm->hwpwm));
+	pwmc0 = readl(priv->base + PIPGM_PWMC(pwm->hwpwm));
+	pwmc0_clk = pwmc0 & PIPGM_PWMC_CLK_MASK;
+
+	state->period = (period << pwmc0_clk) * NSEC_PER_USEC;
+	state->duty_cycle = (duty << pwmc0_clk) * NSEC_PER_USEC;
+	if (pwmc0 & PIPGM_PWMC_POLARITY_MASK)
+		state->polarity = PWM_POLARITY_INVERSED;
+	else
+		state->polarity = PWM_POLARITY_NORMAL;
+
+	state->enabled = true;
+}
+
+static const struct pwm_ops visconti_pwm_ops = {
+	.apply = visconti_pwm_apply,
+	.get_state = visconti_pwm_get_state,
+	.owner = THIS_MODULE,
+};
+
+static int visconti_pwm_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct visconti_pwm_chip *priv;
+	int ret;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(priv->base))
+		return PTR_ERR(priv->base);
+
+	platform_set_drvdata(pdev, priv);
+
+	priv->chip.dev = dev;
+	priv->chip.ops = &visconti_pwm_ops;
+	priv->chip.npwm = 4;
+
+	ret = pwmchip_add(&priv->chip);
+	if (ret < 0)
+		return dev_err_probe(&pdev->dev, ret, "Cannot register visconti PWM\n");
+
+	return 0;
+}
+
+static int visconti_pwm_remove(struct platform_device *pdev)
+{
+	struct visconti_pwm_chip *priv = platform_get_drvdata(pdev);
+
+	pwmchip_remove(&priv->chip);
+
+	return 0;
+}
+
+static const struct of_device_id visconti_pwm_of_match[] = {
+	{ .compatible = "toshiba,visconti-pwm", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, visconti_pwm_of_match);
+
+static struct platform_driver visconti_pwm_driver = {
+	.driver = {
+		.name = "pwm-visconti",
+		.of_match_table = visconti_pwm_of_match,
+	},
+	.probe = visconti_pwm_probe,
+	.remove = visconti_pwm_remove,
+};
+module_platform_driver(visconti_pwm_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>");
+MODULE_ALIAS("platform:pwm-visconti");
-- 
cgit v1.2.3


From 453e8b3d8e36ddcb283b3d1698864a03ea45599a Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Tue, 20 Apr 2021 11:51:17 +0200
Subject: pwm: atmel: Fix duty cycle calculation in .get_state()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The CDTY register contains the number of inactive cycles. .apply() does
this correctly, however .get_state() got this wrong.

Fixes: 651b510a74d4 ("pwm: atmel: Implement .get_state()")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-atmel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c
index d49da708337f..ebaeb50dcfde 100644
--- a/drivers/pwm/pwm-atmel.c
+++ b/drivers/pwm/pwm-atmel.c
@@ -319,7 +319,7 @@ static void atmel_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
 
 		cdty = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm,
 					  atmel_pwm->data->regs.duty);
-		tmp = (u64)cdty * NSEC_PER_SEC;
+		tmp = (u64)(cprd - cdty) * NSEC_PER_SEC;
 		tmp <<= pres;
 		state->duty_cycle = DIV64_U64_ROUND_UP(tmp, rate);
 
-- 
cgit v1.2.3


From 8035e6c66a5e98f098edf7441667de74affb4e78 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Tue, 20 Apr 2021 11:51:18 +0200
Subject: pwm: atmel: Improve duty cycle calculation in .apply()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

In the calculation of the register value determining the duty cycle the
requested period is used instead of the actually implemented period which
results in suboptimal settings.

The following example assumes an input clock of 133333333 Hz on one of
the SoCs with 16 bit period.

When the following state is to be applied:

        .period = 414727681
        .duty_cycle = 652806

the following register values used to be  calculated:

        PRES = 10
        CPRD = 54000
        CDTY = 53916

which yields an actual duty cycle of a bit more than 645120 ns.

The setting

        PRES = 10
        CPRD = 54000
        CDTY = 53915

however yields a duty of 652800 ns which is between the current result
and the requested value and so is a better approximation.

The reason for this error is that for the calculation of CDTY the
requested period was used instead of the actually implemented one.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
 drivers/pwm/pwm-atmel.c | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c
index ebaeb50dcfde..29b5ad03f715 100644
--- a/drivers/pwm/pwm-atmel.c
+++ b/drivers/pwm/pwm-atmel.c
@@ -124,6 +124,7 @@ static inline void atmel_pwm_ch_writel(struct atmel_pwm_chip *chip,
 }
 
 static int atmel_pwm_calculate_cprd_and_pres(struct pwm_chip *chip,
+					     unsigned long clkrate,
 					     const struct pwm_state *state,
 					     unsigned long *cprd, u32 *pres)
 {
@@ -132,7 +133,7 @@ static int atmel_pwm_calculate_cprd_and_pres(struct pwm_chip *chip,
 	int shift;
 
 	/* Calculate the period cycles and prescale value */
-	cycles *= clk_get_rate(atmel_pwm->clk);
+	cycles *= clkrate;
 	do_div(cycles, NSEC_PER_SEC);
 
 	/*
@@ -158,12 +159,14 @@ static int atmel_pwm_calculate_cprd_and_pres(struct pwm_chip *chip,
 }
 
 static void atmel_pwm_calculate_cdty(const struct pwm_state *state,
-				     unsigned long cprd, unsigned long *cdty)
+				     unsigned long clkrate, unsigned long cprd,
+				     u32 pres, unsigned long *cdty)
 {
 	unsigned long long cycles = state->duty_cycle;
 
-	cycles *= cprd;
-	do_div(cycles, state->period);
+	cycles *= clkrate;
+	do_div(cycles, NSEC_PER_SEC);
+	cycles >>= pres;
 	*cdty = cprd - cycles;
 }
 
@@ -244,17 +247,23 @@ static int atmel_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 	pwm_get_state(pwm, &cstate);
 
 	if (state->enabled) {
+		unsigned long clkrate = clk_get_rate(atmel_pwm->clk);
+
 		if (cstate.enabled &&
 		    cstate.polarity == state->polarity &&
 		    cstate.period == state->period) {
+			u32 cmr = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm, PWM_CMR);
+
 			cprd = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm,
 						  atmel_pwm->data->regs.period);
-			atmel_pwm_calculate_cdty(state, cprd, &cdty);
+			pres = cmr & PWM_CMR_CPRE_MSK;
+
+			atmel_pwm_calculate_cdty(state, clkrate, cprd, pres, &cdty);
 			atmel_pwm_update_cdty(chip, pwm, cdty);
 			return 0;
 		}
 
-		ret = atmel_pwm_calculate_cprd_and_pres(chip, state, &cprd,
+		ret = atmel_pwm_calculate_cprd_and_pres(chip, clkrate, state, &cprd,
 							&pres);
 		if (ret) {
 			dev_err(chip->dev,
@@ -262,7 +271,7 @@ static int atmel_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 			return ret;
 		}
 
-		atmel_pwm_calculate_cdty(state, cprd, &cdty);
+		atmel_pwm_calculate_cdty(state, clkrate, cprd, pres, &cdty);
 
 		if (cstate.enabled) {
 			atmel_pwm_disable(chip, pwm, false);
-- 
cgit v1.2.3


From 93a40a6d7428921897bb7fed5ffb4ce83df05432 Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Tue, 20 Apr 2021 11:46:22 -0700
Subject: dmaengine: idxd: add percpu_ref to descriptor submission path

Current submission path has no way to restrict the submitter from
stop submiting on shutdown path or wq disable path. This provides a way to
quiesce the submission path.

Modeling after 'struct reqeust_queue' usage of percpu_ref. One of the
abilities of per_cpu reference counting is the ability to stop new
references from being taken while awaiting outstanding references to be
dropped. On wq shutdown, we want to block any new submissions to the kernel
workqueue and quiesce before disabling. The percpu_ref allows us to block
any new submissions and wait for any current submission calls to finish
submitting to the workqueue.

A percpu_ref is embedded in each idxd_wq context to allow control for
individual wq. The wq->wq_active counter is elevated before calling
movdir64b() or enqcmds() to submit a descriptor to the wq and dropped once
the submission call completes. The function is gated by
percpu_ref_tryget_live(). On shutdown with percpu_ref_kill() called, any
new submission would be blocked from acquiring a ref and failed. Once all
references are dropped for the wq, shutdown can continue.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894438293.3202472.14894701611500822232.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/device.c |  26 ++++++
 drivers/dma/idxd/idxd.h   |   4 +
 drivers/dma/idxd/init.c   |   1 +
 drivers/dma/idxd/submit.c |   5 +
 drivers/dma/idxd/sysfs.c  | 233 +++++++++++++++++++++++++---------------------
 5 files changed, 161 insertions(+), 108 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 016df87cf5c5..6d674fdedb4d 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -384,6 +384,32 @@ void idxd_wq_disable_cleanup(struct idxd_wq *wq)
 	memset(wq->name, 0, WQ_NAME_SIZE);
 }
 
+static void idxd_wq_ref_release(struct percpu_ref *ref)
+{
+	struct idxd_wq *wq = container_of(ref, struct idxd_wq, wq_active);
+
+	complete(&wq->wq_dead);
+}
+
+int idxd_wq_init_percpu_ref(struct idxd_wq *wq)
+{
+	int rc;
+
+	memset(&wq->wq_active, 0, sizeof(wq->wq_active));
+	rc = percpu_ref_init(&wq->wq_active, idxd_wq_ref_release, 0, GFP_KERNEL);
+	if (rc < 0)
+		return rc;
+	reinit_completion(&wq->wq_dead);
+	return 0;
+}
+
+void idxd_wq_quiesce(struct idxd_wq *wq)
+{
+	percpu_ref_kill(&wq->wq_active);
+	wait_for_completion(&wq->wq_dead);
+	percpu_ref_exit(&wq->wq_active);
+}
+
 /* Device control bits */
 static inline bool idxd_is_enabled(struct idxd_device *idxd)
 {
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 8055e872953c..1b539cbf3c14 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -108,6 +108,8 @@ struct idxd_dma_chan {
 
 struct idxd_wq {
 	void __iomem *portal;
+	struct percpu_ref wq_active;
+	struct completion wq_dead;
 	struct device conf_dev;
 	struct idxd_cdev *idxd_cdev;
 	struct wait_queue_head err_queue;
@@ -395,6 +397,8 @@ void idxd_wq_unmap_portal(struct idxd_wq *wq);
 void idxd_wq_disable_cleanup(struct idxd_wq *wq);
 int idxd_wq_set_pasid(struct idxd_wq *wq, int pasid);
 int idxd_wq_disable_pasid(struct idxd_wq *wq);
+void idxd_wq_quiesce(struct idxd_wq *wq);
+int idxd_wq_init_percpu_ref(struct idxd_wq *wq);
 
 /* submission */
 int idxd_submit_desc(struct idxd_wq *wq, struct idxd_desc *desc);
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index e8f64324bb3a..eda5ffd307c6 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -178,6 +178,7 @@ static int idxd_setup_wqs(struct idxd_device *idxd)
 
 		mutex_init(&wq->wq_lock);
 		init_waitqueue_head(&wq->err_queue);
+		init_completion(&wq->wq_dead);
 		wq->max_xfer_bytes = idxd->max_xfer_bytes;
 		wq->max_batch_size = idxd->max_batch_size;
 		wq->wqcfg = kzalloc_node(idxd->wqcfg_size, GFP_KERNEL, dev_to_node(dev));
diff --git a/drivers/dma/idxd/submit.c b/drivers/dma/idxd/submit.c
index dfc8900d5de3..02f9f51e29a6 100644
--- a/drivers/dma/idxd/submit.c
+++ b/drivers/dma/idxd/submit.c
@@ -86,6 +86,9 @@ int idxd_submit_desc(struct idxd_wq *wq, struct idxd_desc *desc)
 	if (idxd->state != IDXD_DEV_ENABLED)
 		return -EIO;
 
+	if (!percpu_ref_tryget_live(&wq->wq_active))
+		return -ENXIO;
+
 	portal = wq->portal;
 
 	/*
@@ -108,6 +111,8 @@ int idxd_submit_desc(struct idxd_wq *wq, struct idxd_desc *desc)
 			return rc;
 	}
 
+	percpu_ref_put(&wq->wq_active);
+
 	/*
 	 * Pending the descriptor to the lockless list for the irq_entry
 	 * that we designated the descriptor to.
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 581ce56ae4f5..dad5c0be9ae8 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -47,6 +47,127 @@ static int idxd_config_bus_match(struct device *dev,
 	return matched;
 }
 
+static int enable_wq(struct idxd_wq *wq)
+{
+	struct idxd_device *idxd = wq->idxd;
+	struct device *dev = &idxd->pdev->dev;
+	unsigned long flags;
+	int rc;
+
+	mutex_lock(&wq->wq_lock);
+
+	if (idxd->state != IDXD_DEV_ENABLED) {
+		mutex_unlock(&wq->wq_lock);
+		dev_warn(dev, "Enabling while device not enabled.\n");
+		return -EPERM;
+	}
+
+	if (wq->state != IDXD_WQ_DISABLED) {
+		mutex_unlock(&wq->wq_lock);
+		dev_warn(dev, "WQ %d already enabled.\n", wq->id);
+		return -EBUSY;
+	}
+
+	if (!wq->group) {
+		mutex_unlock(&wq->wq_lock);
+		dev_warn(dev, "WQ not attached to group.\n");
+		return -EINVAL;
+	}
+
+	if (strlen(wq->name) == 0) {
+		mutex_unlock(&wq->wq_lock);
+		dev_warn(dev, "WQ name not set.\n");
+		return -EINVAL;
+	}
+
+	/* Shared WQ checks */
+	if (wq_shared(wq)) {
+		if (!device_swq_supported(idxd)) {
+			dev_warn(dev, "PASID not enabled and shared WQ.\n");
+			mutex_unlock(&wq->wq_lock);
+			return -ENXIO;
+		}
+		/*
+		 * Shared wq with the threshold set to 0 means the user
+		 * did not set the threshold or transitioned from a
+		 * dedicated wq but did not set threshold. A value
+		 * of 0 would effectively disable the shared wq. The
+		 * driver does not allow a value of 0 to be set for
+		 * threshold via sysfs.
+		 */
+		if (wq->threshold == 0) {
+			dev_warn(dev, "Shared WQ and threshold 0.\n");
+			mutex_unlock(&wq->wq_lock);
+			return -EINVAL;
+		}
+	}
+
+	rc = idxd_wq_alloc_resources(wq);
+	if (rc < 0) {
+		mutex_unlock(&wq->wq_lock);
+		dev_warn(dev, "WQ resource alloc failed\n");
+		return rc;
+	}
+
+	spin_lock_irqsave(&idxd->dev_lock, flags);
+	rc = idxd_device_config(idxd);
+	spin_unlock_irqrestore(&idxd->dev_lock, flags);
+	if (rc < 0) {
+		mutex_unlock(&wq->wq_lock);
+		dev_warn(dev, "Writing WQ %d config failed: %d\n", wq->id, rc);
+		return rc;
+	}
+
+	rc = idxd_wq_enable(wq);
+	if (rc < 0) {
+		mutex_unlock(&wq->wq_lock);
+		dev_warn(dev, "WQ %d enabling failed: %d\n", wq->id, rc);
+		return rc;
+	}
+
+	rc = idxd_wq_map_portal(wq);
+	if (rc < 0) {
+		dev_warn(dev, "wq portal mapping failed: %d\n", rc);
+		rc = idxd_wq_disable(wq);
+		if (rc < 0)
+			dev_warn(dev, "IDXD wq disable failed\n");
+		mutex_unlock(&wq->wq_lock);
+		return rc;
+	}
+
+	wq->client_count = 0;
+
+	if (wq->type == IDXD_WQT_KERNEL) {
+		rc = idxd_wq_init_percpu_ref(wq);
+		if (rc < 0) {
+			dev_dbg(dev, "percpu_ref setup failed\n");
+			mutex_unlock(&wq->wq_lock);
+			return rc;
+		}
+	}
+
+	if (is_idxd_wq_dmaengine(wq)) {
+		rc = idxd_register_dma_channel(wq);
+		if (rc < 0) {
+			dev_dbg(dev, "DMA channel register failed\n");
+			mutex_unlock(&wq->wq_lock);
+			return rc;
+		}
+	} else if (is_idxd_wq_cdev(wq)) {
+		rc = idxd_wq_add_cdev(wq);
+		if (rc < 0) {
+			dev_dbg(dev, "Cdev creation failed\n");
+			mutex_unlock(&wq->wq_lock);
+			return rc;
+		}
+	}
+
+	mutex_unlock(&wq->wq_lock);
+	dev_info(dev, "wq %s enabled\n", dev_name(&wq->conf_dev));
+
+	return 0;
+}
+
 static int idxd_config_bus_probe(struct device *dev)
 {
 	int rc;
@@ -94,115 +215,8 @@ static int idxd_config_bus_probe(struct device *dev)
 		return 0;
 	} else if (is_idxd_wq_dev(dev)) {
 		struct idxd_wq *wq = confdev_to_wq(dev);
-		struct idxd_device *idxd = wq->idxd;
-
-		mutex_lock(&wq->wq_lock);
-
-		if (idxd->state != IDXD_DEV_ENABLED) {
-			mutex_unlock(&wq->wq_lock);
-			dev_warn(dev, "Enabling while device not enabled.\n");
-			return -EPERM;
-		}
-
-		if (wq->state != IDXD_WQ_DISABLED) {
-			mutex_unlock(&wq->wq_lock);
-			dev_warn(dev, "WQ %d already enabled.\n", wq->id);
-			return -EBUSY;
-		}
-
-		if (!wq->group) {
-			mutex_unlock(&wq->wq_lock);
-			dev_warn(dev, "WQ not attached to group.\n");
-			return -EINVAL;
-		}
-
-		if (strlen(wq->name) == 0) {
-			mutex_unlock(&wq->wq_lock);
-			dev_warn(dev, "WQ name not set.\n");
-			return -EINVAL;
-		}
-
-		/* Shared WQ checks */
-		if (wq_shared(wq)) {
-			if (!device_swq_supported(idxd)) {
-				dev_warn(dev,
-					 "PASID not enabled and shared WQ.\n");
-				mutex_unlock(&wq->wq_lock);
-				return -ENXIO;
-			}
-			/*
-			 * Shared wq with the threshold set to 0 means the user
-			 * did not set the threshold or transitioned from a
-			 * dedicated wq but did not set threshold. A value
-			 * of 0 would effectively disable the shared wq. The
-			 * driver does not allow a value of 0 to be set for
-			 * threshold via sysfs.
-			 */
-			if (wq->threshold == 0) {
-				dev_warn(dev,
-					 "Shared WQ and threshold 0.\n");
-				mutex_unlock(&wq->wq_lock);
-				return -EINVAL;
-			}
-		}
-
-		rc = idxd_wq_alloc_resources(wq);
-		if (rc < 0) {
-			mutex_unlock(&wq->wq_lock);
-			dev_warn(dev, "WQ resource alloc failed\n");
-			return rc;
-		}
-
-		spin_lock_irqsave(&idxd->dev_lock, flags);
-		rc = idxd_device_config(idxd);
-		spin_unlock_irqrestore(&idxd->dev_lock, flags);
-		if (rc < 0) {
-			mutex_unlock(&wq->wq_lock);
-			dev_warn(dev, "Writing WQ %d config failed: %d\n",
-				 wq->id, rc);
-			return rc;
-		}
 
-		rc = idxd_wq_enable(wq);
-		if (rc < 0) {
-			mutex_unlock(&wq->wq_lock);
-			dev_warn(dev, "WQ %d enabling failed: %d\n",
-				 wq->id, rc);
-			return rc;
-		}
-
-		rc = idxd_wq_map_portal(wq);
-		if (rc < 0) {
-			dev_warn(dev, "wq portal mapping failed: %d\n", rc);
-			rc = idxd_wq_disable(wq);
-			if (rc < 0)
-				dev_warn(dev, "IDXD wq disable failed\n");
-			mutex_unlock(&wq->wq_lock);
-			return rc;
-		}
-
-		wq->client_count = 0;
-
-		dev_info(dev, "wq %s enabled\n", dev_name(&wq->conf_dev));
-
-		if (is_idxd_wq_dmaengine(wq)) {
-			rc = idxd_register_dma_channel(wq);
-			if (rc < 0) {
-				dev_dbg(dev, "DMA channel register failed\n");
-				mutex_unlock(&wq->wq_lock);
-				return rc;
-			}
-		} else if (is_idxd_wq_cdev(wq)) {
-			rc = idxd_wq_add_cdev(wq);
-			if (rc < 0) {
-				dev_dbg(dev, "Cdev creation failed\n");
-				mutex_unlock(&wq->wq_lock);
-				return rc;
-			}
-		}
-
-		mutex_unlock(&wq->wq_lock);
-		return 0;
+		return enable_wq(wq);
 	}
 
 	return -ENODEV;
@@ -220,6 +234,9 @@ static void disable_wq(struct idxd_wq *wq)
 		return;
 	}
 
+	if (wq->type == IDXD_WQT_KERNEL)
+		idxd_wq_quiesce(wq);
+
 	if (is_idxd_wq_dmaengine(wq))
 		idxd_unregister_dma_channel(wq);
 	else if (is_idxd_wq_cdev(wq))
-- 
cgit v1.2.3


From 8c66bbdc4fbf3c297ebc8edf71f359e4a132c9db Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Tue, 20 Apr 2021 11:46:28 -0700
Subject: dmaengine: idxd: add support for readonly config mode

The read-only configuration mode is defined by the DSA spec as a mode of
the device WQ configuration. When GENCAP register bit 31 is set to 0,
the device is in RO mode and group configuration and some fields of the
workqueue configuration registers are read-only and reflect the fixed
configuration of the device. Add support for RO mode. The driver will
load the values from the registers directly setup all the internally
cached data structures based on the device configuration.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894438847.3202472.6317563824045432727.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/device.c | 116 ++++++++++++++++++++++++++++++++++++++++++++++
 drivers/dma/idxd/idxd.h   |   1 +
 drivers/dma/idxd/init.c   |   8 ++++
 drivers/dma/idxd/sysfs.c  |  22 +++++----
 4 files changed, 138 insertions(+), 9 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 6d674fdedb4d..3ddb1c731080 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -884,3 +884,119 @@ int idxd_device_config(struct idxd_device *idxd)
 
 	return 0;
 }
+
+static int idxd_wq_load_config(struct idxd_wq *wq)
+{
+	struct idxd_device *idxd = wq->idxd;
+	struct device *dev = &idxd->pdev->dev;
+	int wqcfg_offset;
+	int i;
+
+	wqcfg_offset = WQCFG_OFFSET(idxd, wq->id, 0);
+	memcpy_fromio(wq->wqcfg, idxd->reg_base + wqcfg_offset, idxd->wqcfg_size);
+
+	wq->size = wq->wqcfg->wq_size;
+	wq->threshold = wq->wqcfg->wq_thresh;
+	if (wq->wqcfg->priv)
+		wq->type = IDXD_WQT_KERNEL;
+
+	/* The driver does not support shared WQ mode in read-only config yet */
+	if (wq->wqcfg->mode == 0 || wq->wqcfg->pasid_en)
+		return -EOPNOTSUPP;
+
+	set_bit(WQ_FLAG_DEDICATED, &wq->flags);
+
+	wq->priority = wq->wqcfg->priority;
+
+	for (i = 0; i < WQCFG_STRIDES(idxd); i++) {
+		wqcfg_offset = WQCFG_OFFSET(idxd, wq->id, i);
+		dev_dbg(dev, "WQ[%d][%d][%#x]: %#x\n", wq->id, i, wqcfg_offset, wq->wqcfg->bits[i]);
+	}
+
+	return 0;
+}
+
+static void idxd_group_load_config(struct idxd_group *group)
+{
+	struct idxd_device *idxd = group->idxd;
+	struct device *dev = &idxd->pdev->dev;
+	int i, j, grpcfg_offset;
+
+	/*
+	 * Load WQS bit fields
+	 * Iterate through all 256 bits 64 bits at a time
+	 */
+	for (i = 0; i < GRPWQCFG_STRIDES; i++) {
+		struct idxd_wq *wq;
+
+		grpcfg_offset = GRPWQCFG_OFFSET(idxd, group->id, i);
+		group->grpcfg.wqs[i] = ioread64(idxd->reg_base + grpcfg_offset);
+		dev_dbg(dev, "GRPCFG wq[%d:%d: %#x]: %#llx\n",
+			group->id, i, grpcfg_offset, group->grpcfg.wqs[i]);
+
+		if (i * 64 >= idxd->max_wqs)
+			break;
+
+		/* Iterate through all 64 bits and check for wq set */
+		for (j = 0; j < 64; j++) {
+			int id = i * 64 + j;
+
+			/* No need to check beyond max wqs */
+			if (id >= idxd->max_wqs)
+				break;
+
+			/* Set group assignment for wq if wq bit is set */
+			if (group->grpcfg.wqs[i] & BIT(j)) {
+				wq = idxd->wqs[id];
+				wq->group = group;
+			}
+		}
+	}
+
+	grpcfg_offset = GRPENGCFG_OFFSET(idxd, group->id);
+	group->grpcfg.engines = ioread64(idxd->reg_base + grpcfg_offset);
+	dev_dbg(dev, "GRPCFG engs[%d: %#x]: %#llx\n", group->id,
+		grpcfg_offset, group->grpcfg.engines);
+
+	/* Iterate through all 64 bits to check engines set */
+	for (i = 0; i < 64; i++) {
+		if (i >= idxd->max_engines)
+			break;
+
+		if (group->grpcfg.engines & BIT(i)) {
+			struct idxd_engine *engine = idxd->engines[i];
+
+			engine->group = group;
+		}
+	}
+
+	grpcfg_offset = GRPFLGCFG_OFFSET(idxd, group->id);
+	group->grpcfg.flags.bits = ioread32(idxd->reg_base + grpcfg_offset);
+	dev_dbg(dev, "GRPFLAGS flags[%d: %#x]: %#x\n",
+		group->id, grpcfg_offset, group->grpcfg.flags.bits);
+}
+
+int idxd_device_load_config(struct idxd_device *idxd)
+{
+	union gencfg_reg reg;
+	int i, rc;
+
+	reg.bits = ioread32(idxd->reg_base + IDXD_GENCFG_OFFSET);
+	idxd->token_limit = reg.token_limit;
+
+	for (i = 0; i < idxd->max_groups; i++) {
+		struct idxd_group *group = idxd->groups[i];
+
+		idxd_group_load_config(group);
+	}
+
+	for (i = 0; i < idxd->max_wqs; i++) {
+		struct idxd_wq *wq = idxd->wqs[i];
+
+		rc = idxd_wq_load_config(wq);
+		if (rc < 0)
+			return rc;
+	}
+
+	return 0;
+}
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 1b539cbf3c14..940a2e1ddf12 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -384,6 +384,7 @@ void idxd_device_cleanup(struct idxd_device *idxd);
 int idxd_device_config(struct idxd_device *idxd);
 void idxd_device_wqs_clear_state(struct idxd_device *idxd);
 void idxd_device_drain_pasid(struct idxd_device *idxd, int pasid);
+int idxd_device_load_config(struct idxd_device *idxd);
 
 /* work queue control */
 int idxd_wq_alloc_resources(struct idxd_wq *wq);
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index eda5ffd307c6..a07e6d8eec00 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -482,6 +482,14 @@ static int idxd_probe(struct idxd_device *idxd)
 	if (rc)
 		goto err;
 
+	/* If the configs are readonly, then load them from device */
+	if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) {
+		dev_dbg(dev, "Loading RO device config\n");
+		rc = idxd_device_load_config(idxd);
+		if (rc < 0)
+			goto err;
+	}
+
 	rc = idxd_setup_interrupts(idxd);
 	if (rc)
 		goto err;
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index dad5c0be9ae8..d45cb61f300b 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -110,7 +110,8 @@ static int enable_wq(struct idxd_wq *wq)
 	}
 
 	spin_lock_irqsave(&idxd->dev_lock, flags);
-	rc = idxd_device_config(idxd);
+	if (test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
+		rc = idxd_device_config(idxd);
 	spin_unlock_irqrestore(&idxd->dev_lock, flags);
 	if (rc < 0) {
 		mutex_unlock(&wq->wq_lock);
@@ -170,7 +171,7 @@ static int enable_wq(struct idxd_wq *wq)
 
 static int idxd_config_bus_probe(struct device *dev)
 {
-	int rc;
+	int rc = 0;
 	unsigned long flags;
 
 	dev_dbg(dev, "%s called\n", __func__);
@@ -188,7 +189,8 @@ static int idxd_config_bus_probe(struct device *dev)
 
 		/* Perform IDXD configuration and enabling */
 		spin_lock_irqsave(&idxd->dev_lock, flags);
-		rc = idxd_device_config(idxd);
+		if (test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
+			rc = idxd_device_config(idxd);
 		spin_unlock_irqrestore(&idxd->dev_lock, flags);
 		if (rc < 0) {
 			module_put(THIS_MODULE);
@@ -287,12 +289,14 @@ static int idxd_config_bus_remove(struct device *dev)
 
 		idxd_unregister_dma_device(idxd);
 		rc = idxd_device_disable(idxd);
-		for (i = 0; i < idxd->max_wqs; i++) {
-			struct idxd_wq *wq = idxd->wqs[i];
-
-			mutex_lock(&wq->wq_lock);
-			idxd_wq_disable_cleanup(wq);
-			mutex_unlock(&wq->wq_lock);
+		if (test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) {
+			for (i = 0; i < idxd->max_wqs; i++) {
+				struct idxd_wq *wq = idxd->wqs[i];
+
+				mutex_lock(&wq->wq_lock);
+				idxd_wq_disable_cleanup(wq);
+				mutex_unlock(&wq->wq_lock);
+			}
 		}
 		module_put(THIS_MODULE);
 		if (rc < 0)
-- 
cgit v1.2.3


From eb15e7154fbfa3e61c777704b2ff28eb3a0d4796 Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Tue, 20 Apr 2021 11:46:34 -0700
Subject: dmaengine: idxd: add interrupt handle request and release support

DSA spec states that when Request Interrupt Handle and Release Interrupt
Handle command bits are set in the CMDCAP register, these device commands
must be supported by the driver.

The interrupt handle is programmed in a descriptor. When Request Interrupt
Handle is not supported, the interrupt handle is the index of the desired
entry in the MSI-X table. When the command is supported, driver must use
the command to obtain a handle to be programmed in the submitted
descriptor.

A requested handle may be revoked. After the handle is revoked, any use of
the handle will result in Invalid Interrupt Handle error.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894439422.3202472.17579543737810265471.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/device.c    | 71 ++++++++++++++++++++++++++++++++++++++++++++
 drivers/dma/idxd/idxd.h      | 13 ++++++++
 drivers/dma/idxd/init.c      | 56 +++++++++++++++++++++++++++++++++-
 drivers/dma/idxd/registers.h |  9 +++++-
 drivers/dma/idxd/submit.c    | 35 +++++++++++++++++-----
 drivers/dma/idxd/sysfs.c     |  1 +
 6 files changed, 176 insertions(+), 9 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 3ddb1c731080..54d5afec81cf 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -598,6 +598,77 @@ void idxd_device_drain_pasid(struct idxd_device *idxd, int pasid)
 	dev_dbg(dev, "pasid %d drained\n", pasid);
 }
 
+int idxd_device_request_int_handle(struct idxd_device *idxd, int idx, int *handle,
+				   enum idxd_interrupt_type irq_type)
+{
+	struct device *dev = &idxd->pdev->dev;
+	u32 operand, status;
+
+	if (!(idxd->hw.cmd_cap & BIT(IDXD_CMD_REQUEST_INT_HANDLE)))
+		return -EOPNOTSUPP;
+
+	dev_dbg(dev, "get int handle, idx %d\n", idx);
+
+	operand = idx & GENMASK(15, 0);
+	if (irq_type == IDXD_IRQ_IMS)
+		operand |= CMD_INT_HANDLE_IMS;
+
+	dev_dbg(dev, "cmd: %u operand: %#x\n", IDXD_CMD_REQUEST_INT_HANDLE, operand);
+
+	idxd_cmd_exec(idxd, IDXD_CMD_REQUEST_INT_HANDLE, operand, &status);
+
+	if ((status & IDXD_CMDSTS_ERR_MASK) != IDXD_CMDSTS_SUCCESS) {
+		dev_dbg(dev, "request int handle failed: %#x\n", status);
+		return -ENXIO;
+	}
+
+	*handle = (status >> IDXD_CMDSTS_RES_SHIFT) & GENMASK(15, 0);
+
+	dev_dbg(dev, "int handle acquired: %u\n", *handle);
+	return 0;
+}
+
+int idxd_device_release_int_handle(struct idxd_device *idxd, int handle,
+				   enum idxd_interrupt_type irq_type)
+{
+	struct device *dev = &idxd->pdev->dev;
+	u32 operand, status;
+	union idxd_command_reg cmd;
+	unsigned long flags;
+
+	if (!(idxd->hw.cmd_cap & BIT(IDXD_CMD_RELEASE_INT_HANDLE)))
+		return -EOPNOTSUPP;
+
+	dev_dbg(dev, "release int handle, handle %d\n", handle);
+
+	memset(&cmd, 0, sizeof(cmd));
+	operand = handle & GENMASK(15, 0);
+
+	if (irq_type == IDXD_IRQ_IMS)
+		operand |= CMD_INT_HANDLE_IMS;
+
+	cmd.cmd = IDXD_CMD_RELEASE_INT_HANDLE;
+	cmd.operand = operand;
+
+	dev_dbg(dev, "cmd: %u operand: %#x\n", IDXD_CMD_RELEASE_INT_HANDLE, operand);
+
+	spin_lock_irqsave(&idxd->dev_lock, flags);
+	iowrite32(cmd.bits, idxd->reg_base + IDXD_CMD_OFFSET);
+
+	while (ioread32(idxd->reg_base + IDXD_CMDSTS_OFFSET) & IDXD_CMDSTS_ACTIVE)
+		cpu_relax();
+	status = ioread32(idxd->reg_base + IDXD_CMDSTS_OFFSET);
+	spin_unlock_irqrestore(&idxd->dev_lock, flags);
+
+	if ((status & IDXD_CMDSTS_ERR_MASK) != IDXD_CMDSTS_SUCCESS) {
+		dev_dbg(dev, "release int handle failed: %#x\n", status);
+		return -ENXIO;
+	}
+
+	dev_dbg(dev, "int handle released.\n");
+	return 0;
+}
+
 /* Device configuration bits */
 void idxd_msix_perm_setup(struct idxd_device *idxd)
 {
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 940a2e1ddf12..c1d4a1976206 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -160,6 +160,7 @@ struct idxd_hw {
 	union group_cap_reg group_cap;
 	union engine_cap_reg engine_cap;
 	struct opcap opcap;
+	u32 cmd_cap;
 };
 
 enum idxd_device_state {
@@ -237,6 +238,8 @@ struct idxd_device {
 	struct idxd_dma_dev *idxd_dma;
 	struct workqueue_struct *wq;
 	struct work_struct work;
+
+	int *int_handles;
 };
 
 /* IDXD software descriptor */
@@ -256,6 +259,7 @@ struct idxd_desc {
 	struct list_head list;
 	int id;
 	int cpu;
+	unsigned int vector;
 	struct idxd_wq *wq;
 };
 
@@ -330,6 +334,11 @@ enum idxd_portal_prot {
 	IDXD_PORTAL_LIMITED,
 };
 
+enum idxd_interrupt_type {
+	IDXD_IRQ_MSIX = 0,
+	IDXD_IRQ_IMS,
+};
+
 static inline int idxd_get_wq_portal_offset(enum idxd_portal_prot prot)
 {
 	return prot * 0x1000;
@@ -385,6 +394,10 @@ int idxd_device_config(struct idxd_device *idxd);
 void idxd_device_wqs_clear_state(struct idxd_device *idxd);
 void idxd_device_drain_pasid(struct idxd_device *idxd, int pasid);
 int idxd_device_load_config(struct idxd_device *idxd);
+int idxd_device_request_int_handle(struct idxd_device *idxd, int idx, int *handle,
+				   enum idxd_interrupt_type irq_type);
+int idxd_device_release_int_handle(struct idxd_device *idxd, int handle,
+				   enum idxd_interrupt_type irq_type);
 
 /* work queue control */
 int idxd_wq_alloc_resources(struct idxd_wq *wq);
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index a07e6d8eec00..ef58750c24cc 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -125,7 +125,25 @@ static int idxd_setup_interrupts(struct idxd_device *idxd)
 			dev_err(dev, "Failed to allocate irq %d.\n", irq_entry->vector);
 			goto err_wq_irqs;
 		}
+
 		dev_dbg(dev, "Allocated idxd-msix %d for vector %d\n", i, irq_entry->vector);
+		if (idxd->hw.cmd_cap & BIT(IDXD_CMD_REQUEST_INT_HANDLE)) {
+			/*
+			 * The MSIX vector enumeration starts at 1 with vector 0 being the
+			 * misc interrupt that handles non I/O completion events. The
+			 * interrupt handles are for IMS enumeration on guest. The misc
+			 * interrupt vector does not require a handle and therefore we start
+			 * the int_handles at index 0. Since 'i' starts at 1, the first
+			 * int_handles index will be 0.
+			 */
+			rc = idxd_device_request_int_handle(idxd, i, &idxd->int_handles[i - 1],
+							    IDXD_IRQ_MSIX);
+			if (rc < 0) {
+				free_irq(irq_entry->vector, irq_entry);
+				goto err_wq_irqs;
+			}
+			dev_dbg(dev, "int handle requested: %u\n", idxd->int_handles[i - 1]);
+		}
 	}
 
 	idxd_unmask_error_interrupts(idxd);
@@ -136,6 +154,9 @@ static int idxd_setup_interrupts(struct idxd_device *idxd)
 	while (--i >= 0) {
 		irq_entry = &idxd->irq_entries[i];
 		free_irq(irq_entry->vector, irq_entry);
+		if (i != 0)
+			idxd_device_release_int_handle(idxd,
+						       idxd->int_handles[i], IDXD_IRQ_MSIX);
 	}
  err_misc_irq:
 	/* Disable error interrupt generation */
@@ -288,9 +309,15 @@ static int idxd_setup_internals(struct idxd_device *idxd)
 
 	init_waitqueue_head(&idxd->cmd_waitq);
 
+	if (idxd->hw.cmd_cap & BIT(IDXD_CMD_REQUEST_INT_HANDLE)) {
+		idxd->int_handles = devm_kcalloc(dev, idxd->max_wqs, sizeof(int), GFP_KERNEL);
+		if (!idxd->int_handles)
+			return -ENOMEM;
+	}
+
 	rc = idxd_setup_wqs(idxd);
 	if (rc < 0)
-		return rc;
+		goto err_wqs;
 
 	rc = idxd_setup_engines(idxd);
 	if (rc < 0)
@@ -317,6 +344,8 @@ static int idxd_setup_internals(struct idxd_device *idxd)
  err_engine:
 	for (i = 0; i < idxd->max_wqs; i++)
 		put_device(&idxd->wqs[i]->conf_dev);
+ err_wqs:
+	kfree(idxd->int_handles);
 	return rc;
 }
 
@@ -345,6 +374,12 @@ static void idxd_read_caps(struct idxd_device *idxd)
 	/* reading generic capabilities */
 	idxd->hw.gen_cap.bits = ioread64(idxd->reg_base + IDXD_GENCAP_OFFSET);
 	dev_dbg(dev, "gen_cap: %#llx\n", idxd->hw.gen_cap.bits);
+
+	if (idxd->hw.gen_cap.cmd_cap) {
+		idxd->hw.cmd_cap = ioread32(idxd->reg_base + IDXD_CMDCAP_OFFSET);
+		dev_dbg(dev, "cmd_cap: %#x\n", idxd->hw.cmd_cap);
+	}
+
 	idxd->max_xfer_bytes = 1ULL << idxd->hw.gen_cap.max_xfer_shift;
 	dev_dbg(dev, "max xfer size: %llu bytes\n", idxd->max_xfer_bytes);
 	idxd->max_batch_size = 1U << idxd->hw.gen_cap.max_batch_shift;
@@ -604,6 +639,24 @@ static void idxd_flush_work_list(struct idxd_irq_entry *ie)
 	}
 }
 
+static void idxd_release_int_handles(struct idxd_device *idxd)
+{
+	struct device *dev = &idxd->pdev->dev;
+	int i, rc;
+
+	for (i = 0; i < idxd->num_wq_irqs; i++) {
+		if (idxd->hw.cmd_cap & BIT(IDXD_CMD_RELEASE_INT_HANDLE)) {
+			rc = idxd_device_release_int_handle(idxd, idxd->int_handles[i],
+							    IDXD_IRQ_MSIX);
+			if (rc < 0)
+				dev_warn(dev, "irq handle %d release failed\n",
+					 idxd->int_handles[i]);
+			else
+				dev_dbg(dev, "int handle requested: %u\n", idxd->int_handles[i]);
+		}
+	}
+}
+
 static void idxd_shutdown(struct pci_dev *pdev)
 {
 	struct idxd_device *idxd = pci_get_drvdata(pdev);
@@ -630,6 +683,7 @@ static void idxd_shutdown(struct pci_dev *pdev)
 	}
 
 	idxd_msix_perm_clear(idxd);
+	idxd_release_int_handles(idxd);
 	pci_free_irq_vectors(pdev);
 	pci_iounmap(pdev, idxd->reg_base);
 	pci_disable_device(pdev);
diff --git a/drivers/dma/idxd/registers.h b/drivers/dma/idxd/registers.h
index 751ecb4f9f81..5cbf368c7367 100644
--- a/drivers/dma/idxd/registers.h
+++ b/drivers/dma/idxd/registers.h
@@ -24,8 +24,8 @@ union gen_cap_reg {
 		u64 overlap_copy:1;
 		u64 cache_control_mem:1;
 		u64 cache_control_cache:1;
+		u64 cmd_cap:1;
 		u64 rsvd:3;
-		u64 int_handle_req:1;
 		u64 dest_readback:1;
 		u64 drain_readback:1;
 		u64 rsvd2:6;
@@ -180,8 +180,11 @@ enum idxd_cmd {
 	IDXD_CMD_DRAIN_PASID,
 	IDXD_CMD_ABORT_PASID,
 	IDXD_CMD_REQUEST_INT_HANDLE,
+	IDXD_CMD_RELEASE_INT_HANDLE,
 };
 
+#define CMD_INT_HANDLE_IMS		0x10000
+
 #define IDXD_CMDSTS_OFFSET		0xa8
 union cmdsts_reg {
 	struct {
@@ -193,6 +196,8 @@ union cmdsts_reg {
 	u32 bits;
 } __packed;
 #define IDXD_CMDSTS_ACTIVE		0x80000000
+#define IDXD_CMDSTS_ERR_MASK		0xff
+#define IDXD_CMDSTS_RES_SHIFT		8
 
 enum idxd_cmdsts_err {
 	IDXD_CMDSTS_SUCCESS = 0,
@@ -228,6 +233,8 @@ enum idxd_cmdsts_err {
 	IDXD_CMDSTS_ERR_NO_HANDLE,
 };
 
+#define IDXD_CMDCAP_OFFSET		0xb0
+
 #define IDXD_SWERR_OFFSET		0xc0
 #define IDXD_SWERR_VALID		0x00000001
 #define IDXD_SWERR_OVERFLOW		0x00000002
diff --git a/drivers/dma/idxd/submit.c b/drivers/dma/idxd/submit.c
index 02f9f51e29a6..19afb62abaff 100644
--- a/drivers/dma/idxd/submit.c
+++ b/drivers/dma/idxd/submit.c
@@ -22,11 +22,23 @@ static struct idxd_desc *__get_desc(struct idxd_wq *wq, int idx, int cpu)
 		desc->hw->pasid = idxd->pasid;
 
 	/*
-	 * Descriptor completion vectors are 1-8 for MSIX. We will round
-	 * robin through the 8 vectors.
+	 * Descriptor completion vectors are 1...N for MSIX. We will round
+	 * robin through the N vectors.
 	 */
 	wq->vec_ptr = (wq->vec_ptr % idxd->num_wq_irqs) + 1;
-	desc->hw->int_handle = wq->vec_ptr;
+	if (!idxd->int_handles) {
+		desc->hw->int_handle = wq->vec_ptr;
+	} else {
+		desc->vector = wq->vec_ptr;
+		/*
+		 * int_handles are only for descriptor completion. However for device
+		 * MSIX enumeration, vec 0 is used for misc interrupts. Therefore even
+		 * though we are rotating through 1...N for descriptor interrupts, we
+		 * need to acqurie the int_handles from 0..N-1.
+		 */
+		desc->hw->int_handle = idxd->int_handles[desc->vector - 1];
+	}
+
 	return desc;
 }
 
@@ -79,7 +91,6 @@ void idxd_free_desc(struct idxd_wq *wq, struct idxd_desc *desc)
 int idxd_submit_desc(struct idxd_wq *wq, struct idxd_desc *desc)
 {
 	struct idxd_device *idxd = wq->idxd;
-	int vec = desc->hw->int_handle;
 	void __iomem *portal;
 	int rc;
 
@@ -117,9 +128,19 @@ int idxd_submit_desc(struct idxd_wq *wq, struct idxd_desc *desc)
 	 * Pending the descriptor to the lockless list for the irq_entry
 	 * that we designated the descriptor to.
 	 */
-	if (desc->hw->flags & IDXD_OP_FLAG_RCI)
-		llist_add(&desc->llnode,
-			  &idxd->irq_entries[vec].pending_llist);
+	if (desc->hw->flags & IDXD_OP_FLAG_RCI) {
+		int vec;
+
+		/*
+		 * If the driver is on host kernel, it would be the value
+		 * assigned to interrupt handle, which is index for MSIX
+		 * vector. If it's guest then can't use the int_handle since
+		 * that is the index to IMS for the entire device. The guest
+		 * device local index will be used.
+		 */
+		vec = !idxd->int_handles ? desc->hw->int_handle : desc->vector;
+		llist_add(&desc->llnode, &idxd->irq_entries[vec].pending_llist);
+	}
 
 	return 0;
 }
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index d45cb61f300b..3f4ea4d0fae7 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -1600,6 +1600,7 @@ static void idxd_conf_device_release(struct device *dev)
 	kfree(idxd->wqs);
 	kfree(idxd->engines);
 	kfree(idxd->irq_entries);
+	kfree(idxd->int_handles);
 	ida_free(&idxd_ida, idxd->id);
 	kfree(idxd);
 }
-- 
cgit v1.2.3


From 8241571fac9eeb7f3424ad343369eaa411919da3 Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Tue, 20 Apr 2021 11:46:40 -0700
Subject: dmaengine: idxd: convert sprintf() to sysfs_emit() for all usages

Convert sprintf() to sysfs_emit() in order to check buffer overrun on sysfs
outputs.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894440044.3202472.13926639619695319753.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/sysfs.c | 116 ++++++++++++++++++++++-------------------------
 1 file changed, 55 insertions(+), 61 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 3f4ea4d0fae7..0460d58e3941 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -350,9 +350,9 @@ static ssize_t engine_group_id_show(struct device *dev,
 		container_of(dev, struct idxd_engine, conf_dev);
 
 	if (engine->group)
-		return sprintf(buf, "%d\n", engine->group->id);
+		return sysfs_emit(buf, "%d\n", engine->group->id);
 	else
-		return sprintf(buf, "%d\n", -1);
+		return sysfs_emit(buf, "%d\n", -1);
 }
 
 static ssize_t engine_group_id_store(struct device *dev,
@@ -447,7 +447,7 @@ static ssize_t group_tokens_reserved_show(struct device *dev,
 	struct idxd_group *group =
 		container_of(dev, struct idxd_group, conf_dev);
 
-	return sprintf(buf, "%u\n", group->tokens_reserved);
+	return sysfs_emit(buf, "%u\n", group->tokens_reserved);
 }
 
 static ssize_t group_tokens_reserved_store(struct device *dev,
@@ -495,7 +495,7 @@ static ssize_t group_tokens_allowed_show(struct device *dev,
 	struct idxd_group *group =
 		container_of(dev, struct idxd_group, conf_dev);
 
-	return sprintf(buf, "%u\n", group->tokens_allowed);
+	return sysfs_emit(buf, "%u\n", group->tokens_allowed);
 }
 
 static ssize_t group_tokens_allowed_store(struct device *dev,
@@ -540,7 +540,7 @@ static ssize_t group_use_token_limit_show(struct device *dev,
 	struct idxd_group *group =
 		container_of(dev, struct idxd_group, conf_dev);
 
-	return sprintf(buf, "%u\n", group->use_token_limit);
+	return sysfs_emit(buf, "%u\n", group->use_token_limit);
 }
 
 static ssize_t group_use_token_limit_store(struct device *dev,
@@ -583,7 +583,6 @@ static ssize_t group_engines_show(struct device *dev,
 	struct idxd_group *group =
 		container_of(dev, struct idxd_group, conf_dev);
 	int i, rc = 0;
-	char *tmp = buf;
 	struct idxd_device *idxd = group->idxd;
 
 	for (i = 0; i < idxd->max_engines; i++) {
@@ -593,12 +592,13 @@ static ssize_t group_engines_show(struct device *dev,
 			continue;
 
 		if (engine->group->id == group->id)
-			rc += sprintf(tmp + rc, "engine%d.%d ",
-					idxd->id, engine->id);
+			rc += sysfs_emit_at(buf, rc, "engine%d.%d ", idxd->id, engine->id);
 	}
 
+	if (!rc)
+		return 0;
 	rc--;
-	rc += sprintf(tmp + rc, "\n");
+	rc += sysfs_emit_at(buf, rc, "\n");
 
 	return rc;
 }
@@ -612,7 +612,6 @@ static ssize_t group_work_queues_show(struct device *dev,
 	struct idxd_group *group =
 		container_of(dev, struct idxd_group, conf_dev);
 	int i, rc = 0;
-	char *tmp = buf;
 	struct idxd_device *idxd = group->idxd;
 
 	for (i = 0; i < idxd->max_wqs; i++) {
@@ -622,12 +621,13 @@ static ssize_t group_work_queues_show(struct device *dev,
 			continue;
 
 		if (wq->group->id == group->id)
-			rc += sprintf(tmp + rc, "wq%d.%d ",
-					idxd->id, wq->id);
+			rc += sysfs_emit_at(buf, rc, "wq%d.%d ", idxd->id, wq->id);
 	}
 
+	if (!rc)
+		return 0;
 	rc--;
-	rc += sprintf(tmp + rc, "\n");
+	rc += sysfs_emit_at(buf, rc, "\n");
 
 	return rc;
 }
@@ -642,7 +642,7 @@ static ssize_t group_traffic_class_a_show(struct device *dev,
 	struct idxd_group *group =
 		container_of(dev, struct idxd_group, conf_dev);
 
-	return sprintf(buf, "%d\n", group->tc_a);
+	return sysfs_emit(buf, "%d\n", group->tc_a);
 }
 
 static ssize_t group_traffic_class_a_store(struct device *dev,
@@ -683,7 +683,7 @@ static ssize_t group_traffic_class_b_show(struct device *dev,
 	struct idxd_group *group =
 		container_of(dev, struct idxd_group, conf_dev);
 
-	return sprintf(buf, "%d\n", group->tc_b);
+	return sysfs_emit(buf, "%d\n", group->tc_b);
 }
 
 static ssize_t group_traffic_class_b_store(struct device *dev,
@@ -756,7 +756,7 @@ static ssize_t wq_clients_show(struct device *dev,
 {
 	struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
 
-	return sprintf(buf, "%d\n", wq->client_count);
+	return sysfs_emit(buf, "%d\n", wq->client_count);
 }
 
 static struct device_attribute dev_attr_wq_clients =
@@ -769,12 +769,12 @@ static ssize_t wq_state_show(struct device *dev,
 
 	switch (wq->state) {
 	case IDXD_WQ_DISABLED:
-		return sprintf(buf, "disabled\n");
+		return sysfs_emit(buf, "disabled\n");
 	case IDXD_WQ_ENABLED:
-		return sprintf(buf, "enabled\n");
+		return sysfs_emit(buf, "enabled\n");
 	}
 
-	return sprintf(buf, "unknown\n");
+	return sysfs_emit(buf, "unknown\n");
 }
 
 static struct device_attribute dev_attr_wq_state =
@@ -786,9 +786,9 @@ static ssize_t wq_group_id_show(struct device *dev,
 	struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
 
 	if (wq->group)
-		return sprintf(buf, "%u\n", wq->group->id);
+		return sysfs_emit(buf, "%u\n", wq->group->id);
 	else
-		return sprintf(buf, "-1\n");
+		return sysfs_emit(buf, "-1\n");
 }
 
 static ssize_t wq_group_id_store(struct device *dev,
@@ -840,8 +840,7 @@ static ssize_t wq_mode_show(struct device *dev, struct device_attribute *attr,
 {
 	struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
 
-	return sprintf(buf, "%s\n",
-			wq_dedicated(wq) ? "dedicated" : "shared");
+	return sysfs_emit(buf, "%s\n", wq_dedicated(wq) ? "dedicated" : "shared");
 }
 
 static ssize_t wq_mode_store(struct device *dev,
@@ -877,7 +876,7 @@ static ssize_t wq_size_show(struct device *dev, struct device_attribute *attr,
 {
 	struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
 
-	return sprintf(buf, "%u\n", wq->size);
+	return sysfs_emit(buf, "%u\n", wq->size);
 }
 
 static int total_claimed_wq_size(struct idxd_device *idxd)
@@ -928,7 +927,7 @@ static ssize_t wq_priority_show(struct device *dev,
 {
 	struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
 
-	return sprintf(buf, "%u\n", wq->priority);
+	return sysfs_emit(buf, "%u\n", wq->priority);
 }
 
 static ssize_t wq_priority_store(struct device *dev,
@@ -965,8 +964,7 @@ static ssize_t wq_block_on_fault_show(struct device *dev,
 {
 	struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
 
-	return sprintf(buf, "%u\n",
-		       test_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags));
+	return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags));
 }
 
 static ssize_t wq_block_on_fault_store(struct device *dev,
@@ -1005,7 +1003,7 @@ static ssize_t wq_threshold_show(struct device *dev,
 {
 	struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
 
-	return sprintf(buf, "%u\n", wq->threshold);
+	return sysfs_emit(buf, "%u\n", wq->threshold);
 }
 
 static ssize_t wq_threshold_store(struct device *dev,
@@ -1048,15 +1046,12 @@ static ssize_t wq_type_show(struct device *dev,
 
 	switch (wq->type) {
 	case IDXD_WQT_KERNEL:
-		return sprintf(buf, "%s\n",
-			       idxd_wq_type_names[IDXD_WQT_KERNEL]);
+		return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_KERNEL]);
 	case IDXD_WQT_USER:
-		return sprintf(buf, "%s\n",
-			       idxd_wq_type_names[IDXD_WQT_USER]);
+		return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_USER]);
 	case IDXD_WQT_NONE:
 	default:
-		return sprintf(buf, "%s\n",
-			       idxd_wq_type_names[IDXD_WQT_NONE]);
+		return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_NONE]);
 	}
 
 	return -EINVAL;
@@ -1097,7 +1092,7 @@ static ssize_t wq_name_show(struct device *dev,
 {
 	struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
 
-	return sprintf(buf, "%s\n", wq->name);
+	return sysfs_emit(buf, "%s\n", wq->name);
 }
 
 static ssize_t wq_name_store(struct device *dev,
@@ -1167,7 +1162,7 @@ static ssize_t wq_max_transfer_size_show(struct device *dev, struct device_attri
 {
 	struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
 
-	return sprintf(buf, "%llu\n", wq->max_xfer_bytes);
+	return sysfs_emit(buf, "%llu\n", wq->max_xfer_bytes);
 }
 
 static ssize_t wq_max_transfer_size_store(struct device *dev, struct device_attribute *attr,
@@ -1201,7 +1196,7 @@ static ssize_t wq_max_batch_size_show(struct device *dev, struct device_attribut
 {
 	struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
 
-	return sprintf(buf, "%u\n", wq->max_batch_size);
+	return sysfs_emit(buf, "%u\n", wq->max_batch_size);
 }
 
 static ssize_t wq_max_batch_size_store(struct device *dev, struct device_attribute *attr,
@@ -1234,7 +1229,7 @@ static ssize_t wq_ats_disable_show(struct device *dev, struct device_attribute *
 {
 	struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
 
-	return sprintf(buf, "%u\n", wq->ats_dis);
+	return sysfs_emit(buf, "%u\n", wq->ats_dis);
 }
 
 static ssize_t wq_ats_disable_store(struct device *dev, struct device_attribute *attr,
@@ -1311,7 +1306,7 @@ static ssize_t version_show(struct device *dev, struct device_attribute *attr,
 	struct idxd_device *idxd =
 		container_of(dev, struct idxd_device, conf_dev);
 
-	return sprintf(buf, "%#x\n", idxd->hw.version);
+	return sysfs_emit(buf, "%#x\n", idxd->hw.version);
 }
 static DEVICE_ATTR_RO(version);
 
@@ -1322,7 +1317,7 @@ static ssize_t max_work_queues_size_show(struct device *dev,
 	struct idxd_device *idxd =
 		container_of(dev, struct idxd_device, conf_dev);
 
-	return sprintf(buf, "%u\n", idxd->max_wq_size);
+	return sysfs_emit(buf, "%u\n", idxd->max_wq_size);
 }
 static DEVICE_ATTR_RO(max_work_queues_size);
 
@@ -1332,7 +1327,7 @@ static ssize_t max_groups_show(struct device *dev,
 	struct idxd_device *idxd =
 		container_of(dev, struct idxd_device, conf_dev);
 
-	return sprintf(buf, "%u\n", idxd->max_groups);
+	return sysfs_emit(buf, "%u\n", idxd->max_groups);
 }
 static DEVICE_ATTR_RO(max_groups);
 
@@ -1342,7 +1337,7 @@ static ssize_t max_work_queues_show(struct device *dev,
 	struct idxd_device *idxd =
 		container_of(dev, struct idxd_device, conf_dev);
 
-	return sprintf(buf, "%u\n", idxd->max_wqs);
+	return sysfs_emit(buf, "%u\n", idxd->max_wqs);
 }
 static DEVICE_ATTR_RO(max_work_queues);
 
@@ -1352,7 +1347,7 @@ static ssize_t max_engines_show(struct device *dev,
 	struct idxd_device *idxd =
 		container_of(dev, struct idxd_device, conf_dev);
 
-	return sprintf(buf, "%u\n", idxd->max_engines);
+	return sysfs_emit(buf, "%u\n", idxd->max_engines);
 }
 static DEVICE_ATTR_RO(max_engines);
 
@@ -1362,7 +1357,7 @@ static ssize_t numa_node_show(struct device *dev,
 	struct idxd_device *idxd =
 		container_of(dev, struct idxd_device, conf_dev);
 
-	return sprintf(buf, "%d\n", dev_to_node(&idxd->pdev->dev));
+	return sysfs_emit(buf, "%d\n", dev_to_node(&idxd->pdev->dev));
 }
 static DEVICE_ATTR_RO(numa_node);
 
@@ -1372,7 +1367,7 @@ static ssize_t max_batch_size_show(struct device *dev,
 	struct idxd_device *idxd =
 		container_of(dev, struct idxd_device, conf_dev);
 
-	return sprintf(buf, "%u\n", idxd->max_batch_size);
+	return sysfs_emit(buf, "%u\n", idxd->max_batch_size);
 }
 static DEVICE_ATTR_RO(max_batch_size);
 
@@ -1383,7 +1378,7 @@ static ssize_t max_transfer_size_show(struct device *dev,
 	struct idxd_device *idxd =
 		container_of(dev, struct idxd_device, conf_dev);
 
-	return sprintf(buf, "%llu\n", idxd->max_xfer_bytes);
+	return sysfs_emit(buf, "%llu\n", idxd->max_xfer_bytes);
 }
 static DEVICE_ATTR_RO(max_transfer_size);
 
@@ -1409,7 +1404,7 @@ static ssize_t gen_cap_show(struct device *dev,
 	struct idxd_device *idxd =
 		container_of(dev, struct idxd_device, conf_dev);
 
-	return sprintf(buf, "%#llx\n", idxd->hw.gen_cap.bits);
+	return sysfs_emit(buf, "%#llx\n", idxd->hw.gen_cap.bits);
 }
 static DEVICE_ATTR_RO(gen_cap);
 
@@ -1419,8 +1414,7 @@ static ssize_t configurable_show(struct device *dev,
 	struct idxd_device *idxd =
 		container_of(dev, struct idxd_device, conf_dev);
 
-	return sprintf(buf, "%u\n",
-			test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags));
+	return sysfs_emit(buf, "%u\n", test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags));
 }
 static DEVICE_ATTR_RO(configurable);
 
@@ -1440,7 +1434,7 @@ static ssize_t clients_show(struct device *dev,
 	}
 	spin_unlock_irqrestore(&idxd->dev_lock, flags);
 
-	return sprintf(buf, "%d\n", count);
+	return sysfs_emit(buf, "%d\n", count);
 }
 static DEVICE_ATTR_RO(clients);
 
@@ -1450,7 +1444,7 @@ static ssize_t pasid_enabled_show(struct device *dev,
 	struct idxd_device *idxd =
 		container_of(dev, struct idxd_device, conf_dev);
 
-	return sprintf(buf, "%u\n", device_pasid_enabled(idxd));
+	return sysfs_emit(buf, "%u\n", device_pasid_enabled(idxd));
 }
 static DEVICE_ATTR_RO(pasid_enabled);
 
@@ -1463,14 +1457,14 @@ static ssize_t state_show(struct device *dev,
 	switch (idxd->state) {
 	case IDXD_DEV_DISABLED:
 	case IDXD_DEV_CONF_READY:
-		return sprintf(buf, "disabled\n");
+		return sysfs_emit(buf, "disabled\n");
 	case IDXD_DEV_ENABLED:
-		return sprintf(buf, "enabled\n");
+		return sysfs_emit(buf, "enabled\n");
 	case IDXD_DEV_HALTED:
-		return sprintf(buf, "halted\n");
+		return sysfs_emit(buf, "halted\n");
 	}
 
-	return sprintf(buf, "unknown\n");
+	return sysfs_emit(buf, "unknown\n");
 }
 static DEVICE_ATTR_RO(state);
 
@@ -1484,10 +1478,10 @@ static ssize_t errors_show(struct device *dev,
 
 	spin_lock_irqsave(&idxd->dev_lock, flags);
 	for (i = 0; i < 4; i++)
-		out += sprintf(buf + out, "%#018llx ", idxd->sw_err.bits[i]);
+		out += sysfs_emit_at(buf, out, "%#018llx ", idxd->sw_err.bits[i]);
 	spin_unlock_irqrestore(&idxd->dev_lock, flags);
 	out--;
-	out += sprintf(buf + out, "\n");
+	out += sysfs_emit_at(buf, out, "\n");
 	return out;
 }
 static DEVICE_ATTR_RO(errors);
@@ -1498,7 +1492,7 @@ static ssize_t max_tokens_show(struct device *dev,
 	struct idxd_device *idxd =
 		container_of(dev, struct idxd_device, conf_dev);
 
-	return sprintf(buf, "%u\n", idxd->max_tokens);
+	return sysfs_emit(buf, "%u\n", idxd->max_tokens);
 }
 static DEVICE_ATTR_RO(max_tokens);
 
@@ -1508,7 +1502,7 @@ static ssize_t token_limit_show(struct device *dev,
 	struct idxd_device *idxd =
 		container_of(dev, struct idxd_device, conf_dev);
 
-	return sprintf(buf, "%u\n", idxd->token_limit);
+	return sysfs_emit(buf, "%u\n", idxd->token_limit);
 }
 
 static ssize_t token_limit_store(struct device *dev,
@@ -1547,7 +1541,7 @@ static ssize_t cdev_major_show(struct device *dev,
 	struct idxd_device *idxd =
 		container_of(dev, struct idxd_device, conf_dev);
 
-	return sprintf(buf, "%u\n", idxd->major);
+	return sysfs_emit(buf, "%u\n", idxd->major);
 }
 static DEVICE_ATTR_RO(cdev_major);
 
@@ -1556,7 +1550,7 @@ static ssize_t cmd_status_show(struct device *dev,
 {
 	struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev);
 
-	return sprintf(buf, "%#x\n", idxd->cmd_status);
+	return sysfs_emit(buf, "%#x\n", idxd->cmd_status);
 }
 static DEVICE_ATTR_RO(cmd_status);
 
-- 
cgit v1.2.3


From cf5f86a7d47df149857ba2fb72f9c6c9da46af2e Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Tue, 20 Apr 2021 11:46:46 -0700
Subject: dmaengine: idxd: enable SVA feature for IOMMU

Enable IOMMU_DEV_FEAT_SVA before attempt to bind pasid. This is needed
according to iommu_sva_bind_device() comment. Currently Intel IOMMU code
does this before bind call. It really needs to be controlled by the driver.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894440621.3202472.17644507396206848134.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/init.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index ef58750c24cc..eb0b3a00a2d7 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -501,11 +501,18 @@ static int idxd_probe(struct idxd_device *idxd)
 	dev_dbg(dev, "IDXD reset complete\n");
 
 	if (IS_ENABLED(CONFIG_INTEL_IDXD_SVM) && sva) {
-		rc = idxd_enable_system_pasid(idxd);
-		if (rc < 0)
-			dev_warn(dev, "Failed to enable PASID. No SVA support: %d\n", rc);
-		else
-			set_bit(IDXD_FLAG_PASID_ENABLED, &idxd->flags);
+		rc = iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA);
+		if (rc == 0) {
+			rc = idxd_enable_system_pasid(idxd);
+			if (rc < 0) {
+				iommu_dev_disable_feature(dev, IOMMU_DEV_FEAT_SVA);
+				dev_warn(dev, "Failed to enable PASID. No SVA support: %d\n", rc);
+			} else {
+				set_bit(IDXD_FLAG_PASID_ENABLED, &idxd->flags);
+			}
+		} else {
+			dev_warn(dev, "Unable to turn on SVA feature.\n");
+		}
 	} else if (!sva) {
 		dev_warn(dev, "User forced SVA off via module param.\n");
 	}
@@ -539,6 +546,7 @@ static int idxd_probe(struct idxd_device *idxd)
  err:
 	if (device_pasid_enabled(idxd))
 		idxd_disable_system_pasid(idxd);
+	iommu_dev_disable_feature(dev, IOMMU_DEV_FEAT_SVA);
 	return rc;
 }
 
@@ -699,6 +707,7 @@ static void idxd_remove(struct pci_dev *pdev)
 	if (device_pasid_enabled(idxd))
 		idxd_disable_system_pasid(idxd);
 	idxd_unregister_devices(idxd);
+	iommu_dev_disable_feature(&pdev->dev, IOMMU_DEV_FEAT_SVA);
 }
 
 static struct pci_driver idxd_pci_driver = {
-- 
cgit v1.2.3


From 5b0c68c473a131c2acb21abad44b0047b200e185 Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Tue, 20 Apr 2021 11:46:51 -0700
Subject: dmaengine: idxd: support reporting of halt interrupt

Unmask the halt error interrupt so it gets reported to the interrupt
handler. When halt state interrupt is received, quiesce the kernel
WQs and unmap the portals to stop submission.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894441167.3202472.9485946398140619501.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/device.c    | 15 +++++++++++++++
 drivers/dma/idxd/idxd.h      |  2 ++
 drivers/dma/idxd/init.c      | 12 ++++++++++++
 drivers/dma/idxd/irq.c       |  2 ++
 drivers/dma/idxd/registers.h |  3 ++-
 5 files changed, 33 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 54d5afec81cf..3934e660d951 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -47,6 +47,7 @@ void idxd_unmask_error_interrupts(struct idxd_device *idxd)
 
 	genctrl.bits = ioread32(idxd->reg_base + IDXD_GENCTRL_OFFSET);
 	genctrl.softerr_int_en = 1;
+	genctrl.halt_int_en = 1;
 	iowrite32(genctrl.bits, idxd->reg_base + IDXD_GENCTRL_OFFSET);
 }
 
@@ -56,6 +57,7 @@ void idxd_mask_error_interrupts(struct idxd_device *idxd)
 
 	genctrl.bits = ioread32(idxd->reg_base + IDXD_GENCTRL_OFFSET);
 	genctrl.softerr_int_en = 0;
+	genctrl.halt_int_en = 0;
 	iowrite32(genctrl.bits, idxd->reg_base + IDXD_GENCTRL_OFFSET);
 }
 
@@ -312,6 +314,19 @@ void idxd_wq_unmap_portal(struct idxd_wq *wq)
 	struct device *dev = &wq->idxd->pdev->dev;
 
 	devm_iounmap(dev, wq->portal);
+	wq->portal = NULL;
+}
+
+void idxd_wqs_unmap_portal(struct idxd_device *idxd)
+{
+	int i;
+
+	for (i = 0; i < idxd->max_wqs; i++) {
+		struct idxd_wq *wq = idxd->wqs[i];
+
+		if (wq->portal)
+			idxd_wq_unmap_portal(wq);
+	}
 }
 
 int idxd_wq_set_pasid(struct idxd_wq *wq, int pasid)
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index c1d4a1976206..d7185c6bfade 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -371,6 +371,7 @@ int idxd_register_devices(struct idxd_device *idxd);
 void idxd_unregister_devices(struct idxd_device *idxd);
 int idxd_register_driver(void);
 void idxd_unregister_driver(void);
+void idxd_wqs_quiesce(struct idxd_device *idxd);
 
 /* device interrupt control */
 void idxd_msix_perm_setup(struct idxd_device *idxd);
@@ -400,6 +401,7 @@ int idxd_device_release_int_handle(struct idxd_device *idxd, int handle,
 				   enum idxd_interrupt_type irq_type);
 
 /* work queue control */
+void idxd_wqs_unmap_portal(struct idxd_device *idxd);
 int idxd_wq_alloc_resources(struct idxd_wq *wq);
 void idxd_wq_free_resources(struct idxd_wq *wq);
 int idxd_wq_enable(struct idxd_wq *wq);
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index eb0b3a00a2d7..e6bfd55e421b 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -647,6 +647,18 @@ static void idxd_flush_work_list(struct idxd_irq_entry *ie)
 	}
 }
 
+void idxd_wqs_quiesce(struct idxd_device *idxd)
+{
+	struct idxd_wq *wq;
+	int i;
+
+	for (i = 0; i < idxd->max_wqs; i++) {
+		wq = idxd->wqs[i];
+		if (wq->state == IDXD_WQ_ENABLED && wq->type == IDXD_WQT_KERNEL)
+			idxd_wq_quiesce(wq);
+	}
+}
+
 static void idxd_release_int_handles(struct idxd_device *idxd)
 {
 	struct device *dev = &idxd->pdev->dev;
diff --git a/drivers/dma/idxd/irq.c b/drivers/dma/idxd/irq.c
index fc0781e3f36d..43eea5c9cbd4 100644
--- a/drivers/dma/idxd/irq.c
+++ b/drivers/dma/idxd/irq.c
@@ -202,6 +202,8 @@ static int process_misc_interrupts(struct idxd_device *idxd, u32 cause)
 			queue_work(idxd->wq, &idxd->work);
 		} else {
 			spin_lock_bh(&idxd->dev_lock);
+			idxd_wqs_quiesce(idxd);
+			idxd_wqs_unmap_portal(idxd);
 			idxd_device_wqs_clear_state(idxd);
 			dev_err(&idxd->pdev->dev,
 				"idxd halted, need %s.\n",
diff --git a/drivers/dma/idxd/registers.h b/drivers/dma/idxd/registers.h
index 5cbf368c7367..6c11375cc56a 100644
--- a/drivers/dma/idxd/registers.h
+++ b/drivers/dma/idxd/registers.h
@@ -120,7 +120,8 @@ union gencfg_reg {
 union genctrl_reg {
 	struct {
 		u32 softerr_int_en:1;
-		u32 rsvd:31;
+		u32 halt_int_en:1;
+		u32 rsvd:30;
 	};
 	u32 bits;
 } __packed;
-- 
cgit v1.2.3


From 53b2ee7f637c4f1fa2f50dbdb210088e30c11d2b Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Tue, 20 Apr 2021 12:00:56 -0700
Subject: dmaengine: idxd: device cmd should use dedicated lock

Create a dedicated lock for device command operations. Put the device
command operation under finer grained locking instead of using the
idxd->dev_lock.

Suggested-by: Sanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894525685.3210132.16160045731436382560.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/device.c | 18 +++++++++---------
 drivers/dma/idxd/idxd.h   |  1 +
 drivers/dma/idxd/init.c   |  1 +
 3 files changed, 11 insertions(+), 9 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 3934e660d951..420b93fe5feb 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -465,13 +465,13 @@ int idxd_device_init_reset(struct idxd_device *idxd)
 	memset(&cmd, 0, sizeof(cmd));
 	cmd.cmd = IDXD_CMD_RESET_DEVICE;
 	dev_dbg(dev, "%s: sending reset for init.\n", __func__);
-	spin_lock_irqsave(&idxd->dev_lock, flags);
+	spin_lock_irqsave(&idxd->cmd_lock, flags);
 	iowrite32(cmd.bits, idxd->reg_base + IDXD_CMD_OFFSET);
 
 	while (ioread32(idxd->reg_base + IDXD_CMDSTS_OFFSET) &
 	       IDXD_CMDSTS_ACTIVE)
 		cpu_relax();
-	spin_unlock_irqrestore(&idxd->dev_lock, flags);
+	spin_unlock_irqrestore(&idxd->cmd_lock, flags);
 	return 0;
 }
 
@@ -494,10 +494,10 @@ static void idxd_cmd_exec(struct idxd_device *idxd, int cmd_code, u32 operand,
 	cmd.operand = operand;
 	cmd.int_req = 1;
 
-	spin_lock_irqsave(&idxd->dev_lock, flags);
+	spin_lock_irqsave(&idxd->cmd_lock, flags);
 	wait_event_lock_irq(idxd->cmd_waitq,
 			    !test_bit(IDXD_FLAG_CMD_RUNNING, &idxd->flags),
-			    idxd->dev_lock);
+			    idxd->cmd_lock);
 
 	dev_dbg(&idxd->pdev->dev, "%s: sending cmd: %#x op: %#x\n",
 		__func__, cmd_code, operand);
@@ -511,9 +511,9 @@ static void idxd_cmd_exec(struct idxd_device *idxd, int cmd_code, u32 operand,
 	 * After command submitted, release lock and go to sleep until
 	 * the command completes via interrupt.
 	 */
-	spin_unlock_irqrestore(&idxd->dev_lock, flags);
+	spin_unlock_irqrestore(&idxd->cmd_lock, flags);
 	wait_for_completion(&done);
-	spin_lock_irqsave(&idxd->dev_lock, flags);
+	spin_lock_irqsave(&idxd->cmd_lock, flags);
 	if (status) {
 		*status = ioread32(idxd->reg_base + IDXD_CMDSTS_OFFSET);
 		idxd->cmd_status = *status & GENMASK(7, 0);
@@ -522,7 +522,7 @@ static void idxd_cmd_exec(struct idxd_device *idxd, int cmd_code, u32 operand,
 	__clear_bit(IDXD_FLAG_CMD_RUNNING, &idxd->flags);
 	/* Wake up other pending commands */
 	wake_up(&idxd->cmd_waitq);
-	spin_unlock_irqrestore(&idxd->dev_lock, flags);
+	spin_unlock_irqrestore(&idxd->cmd_lock, flags);
 }
 
 int idxd_device_enable(struct idxd_device *idxd)
@@ -667,13 +667,13 @@ int idxd_device_release_int_handle(struct idxd_device *idxd, int handle,
 
 	dev_dbg(dev, "cmd: %u operand: %#x\n", IDXD_CMD_RELEASE_INT_HANDLE, operand);
 
-	spin_lock_irqsave(&idxd->dev_lock, flags);
+	spin_lock_irqsave(&idxd->cmd_lock, flags);
 	iowrite32(cmd.bits, idxd->reg_base + IDXD_CMD_OFFSET);
 
 	while (ioread32(idxd->reg_base + IDXD_CMDSTS_OFFSET) & IDXD_CMDSTS_ACTIVE)
 		cpu_relax();
 	status = ioread32(idxd->reg_base + IDXD_CMDSTS_OFFSET);
-	spin_unlock_irqrestore(&idxd->dev_lock, flags);
+	spin_unlock_irqrestore(&idxd->cmd_lock, flags);
 
 	if ((status & IDXD_CMDSTS_ERR_MASK) != IDXD_CMDSTS_SUCCESS) {
 		dev_dbg(dev, "release int handle failed: %#x\n", status);
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index d7185c6bfade..87330b6940fa 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -204,6 +204,7 @@ struct idxd_device {
 	void __iomem *reg_base;
 
 	spinlock_t dev_lock;	/* spinlock for device */
+	spinlock_t cmd_lock;	/* spinlock for device commands */
 	struct completion *cmd_done;
 	struct idxd_group **groups;
 	struct idxd_wq **wqs;
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index e6bfd55e421b..64dab4de217e 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -449,6 +449,7 @@ static struct idxd_device *idxd_alloc(struct pci_dev *pdev, struct idxd_driver_d
 	}
 
 	spin_lock_init(&idxd->dev_lock);
+	spin_lock_init(&idxd->cmd_lock);
 
 	return idxd;
 }
-- 
cgit v1.2.3


From a16104617d212d4b482568847b25172972b87e60 Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Tue, 20 Apr 2021 12:00:34 -0700
Subject: dmaengine: idxd: remove MSIX masking for interrupt handlers

Remove interrupt masking and just let the hard irq handler keep
firing for new events. This is less of a performance impact vs
the MMIO readback inside the pci_msi_{mask,unmas}_irq(). Especially
with a loaded system those flushes can be stuck behind large amounts
of MMIO writes to flush. When guest kernel is running on top of VFIO
mdev, mask/unmask causes a vmexit each time and is not desirable.

Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/161894523436.3210025.1834640110556139277.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/idxd.h |  1 -
 drivers/dma/idxd/init.c |  4 ++--
 drivers/dma/idxd/irq.c  | 12 ------------
 3 files changed, 2 insertions(+), 15 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 87330b6940fa..97c96ca6ab70 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -377,7 +377,6 @@ void idxd_wqs_quiesce(struct idxd_device *idxd);
 /* device interrupt control */
 void idxd_msix_perm_setup(struct idxd_device *idxd);
 void idxd_msix_perm_clear(struct idxd_device *idxd);
-irqreturn_t idxd_irq_handler(int vec, void *data);
 irqreturn_t idxd_misc_thread(int vec, void *data);
 irqreturn_t idxd_wq_thread(int irq, void *data);
 void idxd_mask_error_interrupts(struct idxd_device *idxd);
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index 64dab4de217e..8003f8a25fff 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -102,7 +102,7 @@ static int idxd_setup_interrupts(struct idxd_device *idxd)
 	}
 
 	irq_entry = &idxd->irq_entries[0];
-	rc = request_threaded_irq(irq_entry->vector, idxd_irq_handler, idxd_misc_thread,
+	rc = request_threaded_irq(irq_entry->vector, NULL, idxd_misc_thread,
 				  0, "idxd-misc", irq_entry);
 	if (rc < 0) {
 		dev_err(dev, "Failed to allocate misc interrupt.\n");
@@ -119,7 +119,7 @@ static int idxd_setup_interrupts(struct idxd_device *idxd)
 
 		init_llist_head(&idxd->irq_entries[i].pending_llist);
 		INIT_LIST_HEAD(&idxd->irq_entries[i].work_list);
-		rc = request_threaded_irq(irq_entry->vector, idxd_irq_handler,
+		rc = request_threaded_irq(irq_entry->vector, NULL,
 					  idxd_wq_thread, 0, "idxd-portal", irq_entry);
 		if (rc < 0) {
 			dev_err(dev, "Failed to allocate irq %d.\n", irq_entry->vector);
diff --git a/drivers/dma/idxd/irq.c b/drivers/dma/idxd/irq.c
index 43eea5c9cbd4..afee571e0194 100644
--- a/drivers/dma/idxd/irq.c
+++ b/drivers/dma/idxd/irq.c
@@ -102,15 +102,6 @@ static int idxd_device_schedule_fault_process(struct idxd_device *idxd,
 	return 0;
 }
 
-irqreturn_t idxd_irq_handler(int vec, void *data)
-{
-	struct idxd_irq_entry *irq_entry = data;
-	struct idxd_device *idxd = irq_entry->idxd;
-
-	idxd_mask_msix_vector(idxd, irq_entry->id);
-	return IRQ_WAKE_THREAD;
-}
-
 static int process_misc_interrupts(struct idxd_device *idxd, u32 cause)
 {
 	struct device *dev = &idxd->pdev->dev;
@@ -237,7 +228,6 @@ irqreturn_t idxd_misc_thread(int vec, void *data)
 			iowrite32(cause, idxd->reg_base + IDXD_INTCAUSE_OFFSET);
 	}
 
-	idxd_unmask_msix_vector(idxd, irq_entry->id);
 	return IRQ_HANDLED;
 }
 
@@ -394,8 +384,6 @@ irqreturn_t idxd_wq_thread(int irq, void *data)
 	int processed;
 
 	processed = idxd_desc_process(irq_entry);
-	idxd_unmask_msix_vector(irq_entry->idxd, irq_entry->id);
-
 	if (processed == 0)
 		return IRQ_NONE;
 
-- 
cgit v1.2.3


From 0d95f41ebde40d552bb4fea64b1d618607915fd6 Mon Sep 17 00:00:00 2001
From: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Date: Thu, 8 Apr 2021 10:28:03 -0700
Subject: Revert "i3c master: fix missing destroy_workqueue() on error in
 i3c_master_register"

Adding the destroy_workqueue call in i3c_master_register introduced below
kernel warning because it makes duplicate destroy_workqueue calls when
i3c_master_register fails after allocating the workqueue. The workqueue will
be destroyed by i3c_masterdev_release which is called by put_device at the
end of the i3c_master_register function eventually in failure cases so the
workqueue doesn't need to be destroyed in i3c_master_register.

[    6.972952] WARNING: CPU: 1 PID: 1 at lib/list_debug.c:48 __list_del_entry_valid+0x9c/0xf4
[    6.982205] list_del corruption, 8fe03c08->prev is LIST_POISON2 (00000122)
[    6.989910] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G        W         5.10.23-c12838a-dirty-31dc772 #1
[    7.000295] Hardware name: Generic DT based system
[    7.005638] Backtrace:
[    7.008369] [<809133f0>] (dump_backtrace) from [<80913644>] (show_stack+0x20/0x24)
[    7.016819]  r7:00000030 r6:60000013 r5:00000000 r4:813b5d40
[    7.023137] [<80913624>] (show_stack) from [<8091e1a0>] (dump_stack+0x9c/0xb0)
[    7.031201] [<8091e104>] (dump_stack) from [<8011fa30>] (__warn+0xf8/0x154)
[    7.038972]  r7:00000030 r6:00000009 r5:804fa1c8 r4:80b6eca4
[    7.045289] [<8011f938>] (__warn) from [<80913d14>] (warn_slowpath_fmt+0x8c/0xc0)
[    7.053641]  r7:00000030 r6:80b6eca4 r5:80b6ed74 r4:818cc000
[    7.059960] [<80913c8c>] (warn_slowpath_fmt) from [<804fa1c8>] (__list_del_entry_valid+0x9c/0xf4)
[    7.069866]  r9:96becf8c r8:818cc000 r7:8fe03c10 r6:8fe03c00 r5:8fe03ba0 r4:ff7ead4c
[    7.078513] [<804fa12c>] (__list_del_entry_valid) from [<8013f0b4>] (destroy_workqueue+0x1c4/0x23c)
[    7.088615] [<8013eef0>] (destroy_workqueue) from [<806aa124>] (i3c_masterdev_release+0x40/0xb0)
[    7.098421]  r7:00000000 r6:81a43b80 r5:8fe65360 r4:8fe65048
[    7.104740] [<806aa0e4>] (i3c_masterdev_release) from [<805f3f04>] (device_release+0x40/0xb0)
[    7.114254]  r5:00000000 r4:8fe65048
[    7.118245] [<805f3ec4>] (device_release) from [<808fe754>] (kobject_put+0xc8/0x204)
[    7.126885]  r5:813978dc r4:8fe65048
[    7.130877] [<808fe68c>] (kobject_put) from [<805f5fbc>] (put_device+0x20/0x24)
[    7.139037]  r7:8fe65358 r6:8fe65368 r5:8fe65358 r4:8fe65048
[    7.145355] [<805f5f9c>] (put_device) from [<806abac4>] (i3c_master_register+0x338/0xb00)
[    7.154487] [<806ab78c>] (i3c_master_register) from [<806ae084>] (dw_i3c_probe+0x224/0x24c)
[    7.163811]  r10:00000000 r9:8fe7a100 r8:00000032 r7:819fa810 r6:819fa800 r5:8fe65040
[    7.172547]  r4:00000000
[    7.175376] [<806ade60>] (dw_i3c_probe) from [<805fdc14>] (platform_drv_probe+0x44/0x80)
[    7.184409]  r9:813a25c0 r8:00000000 r7:815ec114 r6:00000000 r5:813a25c0 r4:819fa810
[    7.193053] [<805fdbd0>] (platform_drv_probe) from [<805fb83c>] (really_probe+0x108/0x50c)
[    7.202275]  r5:815ec004 r4:819fa810
[    7.206265] [<805fb734>] (really_probe) from [<805fc180>] (driver_probe_device+0xb4/0x190)
[    7.215492]  r10:813dc000 r9:80c4385c r8:000000d9 r7:813a25c0 r6:819fa810 r5:00000000
[    7.224228]  r4:813a25c0
[    7.227055] [<805fc0cc>] (driver_probe_device) from [<805fc5cc>] (device_driver_attach+0xb8/0xc0)
[    7.236959]  r9:80c4385c r8:000000d9 r7:813a25c0 r6:819fa854 r4:819fa810
[    7.244439] [<805fc514>] (device_driver_attach) from [<805fc65c>] (__driver_attach+0x88/0x16c)
[    7.254051]  r7:00000000 r6:819fa810 r5:00000000 r4:813a25c0
[    7.260369] [<805fc5d4>] (__driver_attach) from [<805f954c>] (bus_for_each_dev+0x88/0xc8)
[    7.269489]  r7:00000000 r6:818cc000 r5:805fc5d4 r4:813a25c0
[    7.275806] [<805f94c4>] (bus_for_each_dev) from [<805fc76c>] (driver_attach+0x2c/0x30)
[    7.284739]  r7:81397c98 r6:00000000 r5:8fe7db80 r4:813a25c0
[    7.291057] [<805fc740>] (driver_attach) from [<805f9eec>] (bus_add_driver+0x120/0x200)
[    7.299984] [<805f9dcc>] (bus_add_driver) from [<805fce44>] (driver_register+0x98/0x128)
[    7.309005]  r7:80c4383c r6:00000000 r5:00000000 r4:813a25c0
[    7.315323] [<805fcdac>] (driver_register) from [<805fedb4>] (__platform_driver_register+0x50/0x58)
[    7.325410]  r5:818cc000 r4:81397c98
[    7.329404] [<805fed64>] (__platform_driver_register) from [<80c23398>] (dw_i3c_driver_init+0x24/0x28)
[    7.339790]  r5:818cc000 r4:80c23374
[    7.343784] [<80c23374>] (dw_i3c_driver_init) from [<80c01300>] (do_one_initcall+0xac/0x1d0)
[    7.353206] [<80c01254>] (do_one_initcall) from [<80c01630>] (kernel_init_freeable+0x1a8/0x204)
[    7.362916]  r8:000000d9 r7:80c4383c r6:00000007 r5:819ca2c0 r4:80c67680
[    7.370398] [<80c01488>] (kernel_init_freeable) from [<8091eb18>] (kernel_init+0x18/0x12c)
[    7.379616]  r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8091eb00
[    7.388343]  r4:00000000
[    7.391170] [<8091eb00>] (kernel_init) from [<80100148>] (ret_from_fork+0x14/0x2c)
[    7.399607] Exception stack(0x818cdfb0 to 0x818cdff8)
[    7.405243] dfa0:                                     00000000 00000000 00000000 00000000
[    7.414371] dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    7.423499] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    7.430879]  r5:8091eb00 r4:00000000

This reverts commit 59165d16c699182b86b5c65181013f1fd88feb62.

Fixes: 59165d16c699 ("i3c master: fix missing destroy_workqueue() on error in i3c_master_register")
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210408172803.24599-1-jae.hyun.yoo@linux.intel.com
---
 drivers/i3c/master.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index f8e9b7305c13..e2e12a5585e5 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -2535,7 +2535,7 @@ int i3c_master_register(struct i3c_master_controller *master,
 
 	ret = i3c_master_bus_init(master);
 	if (ret)
-		goto err_destroy_wq;
+		goto err_put_dev;
 
 	ret = device_add(&master->dev);
 	if (ret)
@@ -2566,9 +2566,6 @@ err_del_dev:
 err_cleanup_bus:
 	i3c_master_bus_cleanup(master);
 
-err_destroy_wq:
-	destroy_workqueue(master->wq);
-
 err_put_dev:
 	put_device(&master->dev);
 
-- 
cgit v1.2.3


From 81dd4d4d6178306ab31db91bdc7353d485bdafce Mon Sep 17 00:00:00 2001
From: Tom Zanussi <tom.zanussi@linux.intel.com>
Date: Sat, 24 Apr 2021 10:04:15 -0500
Subject: dmaengine: idxd: Add IDXD performance monitor support

Implement the IDXD performance monitor capability (named 'perfmon' in
the DSA (Data Streaming Accelerator) spec [1]), which supports the
collection of information about key events occurring during DSA and
IAX (Intel Analytics Accelerator) device execution, to assist in
performance tuning and debugging.

The idxd perfmon support is implemented as part of the IDXD driver and
interfaces with the Linux perf framework.  It has several features in
common with the existing uncore pmu support:

  - it does not support sampling
  - does not support per-thread counting

However it also has some unique features not present in the core and
uncore support:

  - all general-purpose counters are identical, thus no event constraints
  - operation is always system-wide

While the core perf subsystem assumes that all counters are by default
per-cpu, the uncore pmus are socket-scoped and use a cpu mask to
restrict counting to one cpu from each socket.  IDXD counters use a
similar strategy but expand the scope even further; since IDXD
counters are system-wide and can be read from any cpu, the IDXD perf
driver picks a single cpu to do the work (with cpu hotplug notifiers
to choose a different cpu if the chosen one is taken off-line).

More specifically, the perf userspace tool by default opens a counter
for each cpu for an event.  However, if it finds a cpumask file
associated with the pmu under sysfs, as is the case with the uncore
pmus, it will open counters only on the cpus specified by the cpumask.
Since perfmon only needs to open a single counter per event for a
given IDXD device, the perfmon driver will create a sysfs cpumask file
for the device and insert the first cpu of the system into it.  When a
user uses perf to open an event, perf will open a single counter on
the cpu specified by the cpu mask.  This amounts to the default
system-wide rather than per-cpu counting mentioned previously for
perfmon pmu events.  In order to keep the cpu mask up-to-date, the
driver implements cpu hotplug support for multiple devices, as IDXD
usually enumerates and registers more than one idxd device.

The perfmon driver implements basic perfmon hardware capability
discovery and configuration, and is initialized by the IDXD driver's
probe function.  During initialization, the driver retrieves the total
number of supported performance counters, the pmu ID, and the device
type from idxd device, and registers itself under the Linux perf
framework.

The perf userspace tool can be used to monitor single or multiple
events depending on the given configuration, as well as event groups,
which are also supported by the perfmon driver.  The user configures
events using the perf tool command-line interface by specifying the
event and corresponding event category, along with an optional set of
filters that can be used to restrict counting to specific work queues,
traffic classes, page and transfer sizes, and engines (See [1] for
specifics).

With the configuration specified by the user, the perf tool issues a
system call passing that information to the kernel, which uses it to
initialize the specified event(s).  The event(s) are opened and
started, and following termination of the perf command, they're
stopped.  At that point, the perfmon driver will read the latest count
for the event(s), calculate the difference between the latest counter
values and previously tracked counter values, and display the final
incremental count as the event count for the cycle.  An overflow
handler registered on the IDXD irq path is used to account for counter
overflows, which are signaled by an overflow interrupt.

Below are a couple of examples of perf usage for monitoring DSA events.

The following monitors all events in the 'engine' category.  Becuuse
no filters are specified, this captures all engine events for the
workload, which in this case is 19 iterations of the work generated by
the kernel dmatest module.

Details describing the events can be found in Appendix D of [1],
Performance Monitoring Events, but briefly they are:

  event 0x1:  total input data processed, in 32-byte units
  event 0x2:  total data written, in 32-byte units
  event 0x4:  number of work descriptors that read the source
  event 0x8:  number of work descriptors that write the destination
  event 0x10: number of work descriptors dispatched from batch descriptors
  event 0x20: number of work descriptors dispatched from work queues

 # perf stat -e dsa0/event=0x1,event_category=0x1/,
                dsa0/event=0x2,event_category=0x1/,
		dsa0/event=0x4,event_category=0x1/,
		dsa0/event=0x8,event_category=0x1/,
		dsa0/event=0x10,event_category=0x1/,
		dsa0/event=0x20,event_category=0x1/
		  modprobe dmatest channel=dma0chan0 timeout=2000
		  iterations=19 run=1 wait=1

     Performance counter stats for 'system wide':

                 5,332      dsa0/event=0x1,event_category=0x1/
                 5,327      dsa0/event=0x2,event_category=0x1/
                    19      dsa0/event=0x4,event_category=0x1/
                    19      dsa0/event=0x8,event_category=0x1/
                     0      dsa0/event=0x10,event_category=0x1/
                    19      dsa0/event=0x20,event_category=0x1/

          21.977436186 seconds time elapsed

The command below illustrates filter usage with a simple example.  It
specifies that MEM_MOVE operations should be counted for the DSA
device dsa0 (event 0x8 corresponds to the EV_MEM_MOVE event - Number
of Memory Move Descriptors, which is part of event category 0x3 -
Operations. The detailed category and event IDs are available in
Appendix D, Performance Monitoring Events, of [1]).  In addition to
the event and event category, a number of filters are also specified
(the detailed filter values are available in Chapter 6.4 (Filter
Support) of [1]), which will restrict counting to only those events
that meet all of the filter criteria.  In this case, the filters
specify that only MEM_MOVE operations that are serviced by work queue
wq0 and specifically engine number engine0 and traffic class tc0
having sizes between 0 and 4k and page size of between 0 and 1G result
in a counter hit; anything else will be filtered out and not appear in
the final count.  Note that filters are optional - any filter not
specified is assumed to be all ones and will pass anything.

 # perf stat -e dsa0/filter_wq=0x1,filter_tc=0x1,filter_sz=0x7,
                filter_eng=0x1,event=0x8,event_category=0x3/
		  modprobe dmatest channel=dma0chan0 timeout=2000
		  iterations=19 run=1 wait=1

     Performance counter stats for 'system wide':

       19      dsa0/filter_wq=0x1,filter_tc=0x1,filter_sz=0x7,
               filter_eng=0x1,event=0x8,event_category=0x3/

          21.865914091 seconds time elapsed

The output above reflects that the unspecified workload resulted in
the counting of 19 MEM_MOVE operation events that met the filter
criteria.

[1]: https://software.intel.com/content/www/us/en/develop/download/intel-data-streaming-accelerator-preliminary-architecture-specification.html

[ Based on work originally by Jing Lin. ]

Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Link: https://lore.kernel.org/r/0c5080a7d541904c4ad42b848c76a1ce056ddac7.1619276133.git.zanussi@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 .../ABI/testing/sysfs-bus-event_source-devices-dsa |  30 +
 drivers/dma/Kconfig                                |  12 +
 drivers/dma/idxd/Makefile                          |   2 +
 drivers/dma/idxd/idxd.h                            |  45 ++
 drivers/dma/idxd/perfmon.c                         | 662 +++++++++++++++++++++
 drivers/dma/idxd/perfmon.h                         | 119 ++++
 drivers/dma/idxd/registers.h                       | 108 ++++
 include/linux/cpuhotplug.h                         |   1 +
 8 files changed, 979 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-event_source-devices-dsa
 create mode 100644 drivers/dma/idxd/perfmon.c
 create mode 100644 drivers/dma/idxd/perfmon.h

(limited to 'drivers')

diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-dsa b/Documentation/ABI/testing/sysfs-bus-event_source-devices-dsa
new file mode 100644
index 000000000000..3c7d132281b0
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-dsa
@@ -0,0 +1,30 @@
+What:		/sys/bus/event_source/devices/dsa*/format
+Date:		April 2021
+KernelVersion:  5.13
+Contact:	Tom Zanussi <tom.zanussi@linux.intel.com>
+Description:	Read-only.  Attribute group to describe the magic bits
+		that go into perf_event_attr.config or
+		perf_event_attr.config1 for the IDXD DSA pmu.  (See also
+		ABI/testing/sysfs-bus-event_source-devices-format).
+
+		Each attribute in this group defines a bit range in
+		perf_event_attr.config or perf_event_attr.config1.
+		All supported attributes are listed below (See the
+		IDXD DSA Spec for possible attribute values)::
+
+		    event_category = "config:0-3"    - event category
+		    event          = "config:4-31"   - event ID
+
+		    filter_wq      = "config1:0-31"  - workqueue filter
+		    filter_tc      = "config1:32-39" - traffic class filter
+		    filter_pgsz    = "config1:40-43" - page size filter
+		    filter_sz      = "config1:44-51" - transfer size filter
+		    filter_eng     = "config1:52-59" - engine filter
+
+What:		/sys/bus/event_source/devices/dsa*/cpumask
+Date:		April 2021
+KernelVersion:  5.13
+Contact:	Tom Zanussi <tom.zanussi@linux.intel.com>
+Description:    Read-only.  This file always returns the cpu to which the
+                IDXD DSA pmu is bound for access to all dsa pmu
+		performance monitoring events.
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 0c2827fd8c19..b417217c148c 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -300,6 +300,18 @@ config INTEL_IDXD_SVM
 	depends on PCI_PASID
 	depends on PCI_IOV
 
+config INTEL_IDXD_PERFMON
+	bool "Intel Data Accelerators performance monitor support"
+	depends on INTEL_IDXD
+	help
+	  Enable performance monitor (pmu) support for the Intel(R)
+	  data accelerators present in Intel Xeon CPU.  With this
+	  enabled, perf can be used to monitor the DSA (Intel Data
+	  Streaming Accelerator) events described in the Intel DSA
+	  spec.
+
+	  If unsure, say N.
+
 config INTEL_IOATDMA
 	tristate "Intel I/OAT DMA support"
 	depends on PCI && X86_64
diff --git a/drivers/dma/idxd/Makefile b/drivers/dma/idxd/Makefile
index 8978b898d777..6d11558756f8 100644
--- a/drivers/dma/idxd/Makefile
+++ b/drivers/dma/idxd/Makefile
@@ -1,2 +1,4 @@
 obj-$(CONFIG_INTEL_IDXD) += idxd.o
 idxd-y := init.o irq.o device.o sysfs.o submit.o dma.o cdev.o
+
+idxd-$(CONFIG_INTEL_IDXD_PERFMON) += perfmon.o
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 97c96ca6ab70..26482c7d4c3a 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -9,6 +9,8 @@
 #include <linux/wait.h>
 #include <linux/cdev.h>
 #include <linux/idr.h>
+#include <linux/pci.h>
+#include <linux/perf_event.h>
 #include "registers.h"
 
 #define IDXD_DRIVER_VERSION	"1.00"
@@ -29,6 +31,7 @@ enum idxd_type {
 };
 
 #define IDXD_NAME_SIZE		128
+#define IDXD_PMU_EVENT_MAX	64
 
 struct idxd_device_driver {
 	struct device_driver drv;
@@ -61,6 +64,31 @@ struct idxd_group {
 	int tc_b;
 };
 
+struct idxd_pmu {
+	struct idxd_device *idxd;
+
+	struct perf_event *event_list[IDXD_PMU_EVENT_MAX];
+	int n_events;
+
+	DECLARE_BITMAP(used_mask, IDXD_PMU_EVENT_MAX);
+
+	struct pmu pmu;
+	char name[IDXD_NAME_SIZE];
+	int cpu;
+
+	int n_counters;
+	int counter_width;
+	int n_event_categories;
+
+	bool per_counter_caps_supported;
+	unsigned long supported_event_categories;
+
+	unsigned long supported_filters;
+	int n_filters;
+
+	struct hlist_node cpuhp_node;
+};
+
 #define IDXD_MAX_PRIORITY	0xf
 
 enum idxd_wq_state {
@@ -241,6 +269,8 @@ struct idxd_device {
 	struct work_struct work;
 
 	int *int_handles;
+
+	struct idxd_pmu *idxd_pmu;
 };
 
 /* IDXD software descriptor */
@@ -437,4 +467,19 @@ int idxd_cdev_get_major(struct idxd_device *idxd);
 int idxd_wq_add_cdev(struct idxd_wq *wq);
 void idxd_wq_del_cdev(struct idxd_wq *wq);
 
+/* perfmon */
+#if IS_ENABLED(CONFIG_INTEL_IDXD_PERFMON)
+int perfmon_pmu_init(struct idxd_device *idxd);
+void perfmon_pmu_remove(struct idxd_device *idxd);
+void perfmon_counter_overflow(struct idxd_device *idxd);
+void perfmon_init(void);
+void perfmon_exit(void);
+#else
+static inline int perfmon_pmu_init(struct idxd_device *idxd) { return 0; }
+static inline void perfmon_pmu_remove(struct idxd_device *idxd) {}
+static inline void perfmon_counter_overflow(struct idxd_device *idxd) {}
+static inline void perfmon_init(void) {}
+static inline void perfmon_exit(void) {}
+#endif
+
 #endif
diff --git a/drivers/dma/idxd/perfmon.c b/drivers/dma/idxd/perfmon.c
new file mode 100644
index 000000000000..d73004f47cf4
--- /dev/null
+++ b/drivers/dma/idxd/perfmon.c
@@ -0,0 +1,662 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2020 Intel Corporation. All rights rsvd. */
+
+#include <linux/sched/task.h>
+#include <linux/io-64-nonatomic-lo-hi.h>
+#include "idxd.h"
+#include "perfmon.h"
+
+static ssize_t cpumask_show(struct device *dev, struct device_attribute *attr,
+			    char *buf);
+
+static cpumask_t		perfmon_dsa_cpu_mask;
+static bool			cpuhp_set_up;
+static enum cpuhp_state		cpuhp_slot;
+
+/*
+ * perf userspace reads this attribute to determine which cpus to open
+ * counters on.  It's connected to perfmon_dsa_cpu_mask, which is
+ * maintained by the cpu hotplug handlers.
+ */
+static DEVICE_ATTR_RO(cpumask);
+
+static struct attribute *perfmon_cpumask_attrs[] = {
+	&dev_attr_cpumask.attr,
+	NULL,
+};
+
+static struct attribute_group cpumask_attr_group = {
+	.attrs = perfmon_cpumask_attrs,
+};
+
+/*
+ * These attributes specify the bits in the config word that the perf
+ * syscall uses to pass the event ids and categories to perfmon.
+ */
+DEFINE_PERFMON_FORMAT_ATTR(event_category, "config:0-3");
+DEFINE_PERFMON_FORMAT_ATTR(event, "config:4-31");
+
+/*
+ * These attributes specify the bits in the config1 word that the perf
+ * syscall uses to pass filter data to perfmon.
+ */
+DEFINE_PERFMON_FORMAT_ATTR(filter_wq, "config1:0-31");
+DEFINE_PERFMON_FORMAT_ATTR(filter_tc, "config1:32-39");
+DEFINE_PERFMON_FORMAT_ATTR(filter_pgsz, "config1:40-43");
+DEFINE_PERFMON_FORMAT_ATTR(filter_sz, "config1:44-51");
+DEFINE_PERFMON_FORMAT_ATTR(filter_eng, "config1:52-59");
+
+#define PERFMON_FILTERS_START	2
+#define PERFMON_FILTERS_MAX	5
+
+static struct attribute *perfmon_format_attrs[] = {
+	&format_attr_idxd_event_category.attr,
+	&format_attr_idxd_event.attr,
+	&format_attr_idxd_filter_wq.attr,
+	&format_attr_idxd_filter_tc.attr,
+	&format_attr_idxd_filter_pgsz.attr,
+	&format_attr_idxd_filter_sz.attr,
+	&format_attr_idxd_filter_eng.attr,
+	NULL,
+};
+
+static struct attribute_group perfmon_format_attr_group = {
+	.name = "format",
+	.attrs = perfmon_format_attrs,
+};
+
+static const struct attribute_group *perfmon_attr_groups[] = {
+	&perfmon_format_attr_group,
+	&cpumask_attr_group,
+	NULL,
+};
+
+static ssize_t cpumask_show(struct device *dev, struct device_attribute *attr,
+			    char *buf)
+{
+	return cpumap_print_to_pagebuf(true, buf, &perfmon_dsa_cpu_mask);
+}
+
+static bool is_idxd_event(struct idxd_pmu *idxd_pmu, struct perf_event *event)
+{
+	return &idxd_pmu->pmu == event->pmu;
+}
+
+static int perfmon_collect_events(struct idxd_pmu *idxd_pmu,
+				  struct perf_event *leader,
+				  bool do_grp)
+{
+	struct perf_event *event;
+	int n, max_count;
+
+	max_count = idxd_pmu->n_counters;
+	n = idxd_pmu->n_events;
+
+	if (n >= max_count)
+		return -EINVAL;
+
+	if (is_idxd_event(idxd_pmu, leader)) {
+		idxd_pmu->event_list[n] = leader;
+		idxd_pmu->event_list[n]->hw.idx = n;
+		n++;
+	}
+
+	if (!do_grp)
+		return n;
+
+	for_each_sibling_event(event, leader) {
+		if (!is_idxd_event(idxd_pmu, event) ||
+		    event->state <= PERF_EVENT_STATE_OFF)
+			continue;
+
+		if (n >= max_count)
+			return -EINVAL;
+
+		idxd_pmu->event_list[n] = event;
+		idxd_pmu->event_list[n]->hw.idx = n;
+		n++;
+	}
+
+	return n;
+}
+
+static void perfmon_assign_hw_event(struct idxd_pmu *idxd_pmu,
+				    struct perf_event *event, int idx)
+{
+	struct idxd_device *idxd = idxd_pmu->idxd;
+	struct hw_perf_event *hwc = &event->hw;
+
+	hwc->idx = idx;
+	hwc->config_base = ioread64(CNTRCFG_REG(idxd, idx));
+	hwc->event_base = ioread64(CNTRCFG_REG(idxd, idx));
+}
+
+static int perfmon_assign_event(struct idxd_pmu *idxd_pmu,
+				struct perf_event *event)
+{
+	int i;
+
+	for (i = 0; i < IDXD_PMU_EVENT_MAX; i++)
+		if (!test_and_set_bit(i, idxd_pmu->used_mask))
+			return i;
+
+	return -EINVAL;
+}
+
+/*
+ * Check whether there are enough counters to satisfy that all the
+ * events in the group can actually be scheduled at the same time.
+ *
+ * To do this, create a fake idxd_pmu object so the event collection
+ * and assignment functions can be used without affecting the internal
+ * state of the real idxd_pmu object.
+ */
+static int perfmon_validate_group(struct idxd_pmu *pmu,
+				  struct perf_event *event)
+{
+	struct perf_event *leader = event->group_leader;
+	struct idxd_pmu *fake_pmu;
+	int i, ret = 0, n, idx;
+
+	fake_pmu = kzalloc(sizeof(*fake_pmu), GFP_KERNEL);
+	if (!fake_pmu)
+		return -ENOMEM;
+
+	fake_pmu->pmu.name = pmu->pmu.name;
+	fake_pmu->n_counters = pmu->n_counters;
+
+	n = perfmon_collect_events(fake_pmu, leader, true);
+	if (n < 0) {
+		ret = n;
+		goto out;
+	}
+
+	fake_pmu->n_events = n;
+	n = perfmon_collect_events(fake_pmu, event, false);
+	if (n < 0) {
+		ret = n;
+		goto out;
+	}
+
+	fake_pmu->n_events = n;
+
+	for (i = 0; i < n; i++) {
+		event = fake_pmu->event_list[i];
+
+		idx = perfmon_assign_event(fake_pmu, event);
+		if (idx < 0) {
+			ret = idx;
+			goto out;
+		}
+	}
+out:
+	kfree(fake_pmu);
+
+	return ret;
+}
+
+static int perfmon_pmu_event_init(struct perf_event *event)
+{
+	struct idxd_device *idxd;
+	int ret = 0;
+
+	idxd = event_to_idxd(event);
+	event->hw.idx = -1;
+
+	if (event->attr.type != event->pmu->type)
+		return -ENOENT;
+
+	/* sampling not supported */
+	if (event->attr.sample_period)
+		return -EINVAL;
+
+	if (event->cpu < 0)
+		return -EINVAL;
+
+	if (event->pmu != &idxd->idxd_pmu->pmu)
+		return -EINVAL;
+
+	event->hw.event_base = ioread64(PERFMON_TABLE_OFFSET(idxd));
+	event->cpu = idxd->idxd_pmu->cpu;
+	event->hw.config = event->attr.config;
+
+	if (event->group_leader != event)
+		 /* non-group events have themselves as leader */
+		ret = perfmon_validate_group(idxd->idxd_pmu, event);
+
+	return ret;
+}
+
+static inline u64 perfmon_pmu_read_counter(struct perf_event *event)
+{
+	struct hw_perf_event *hwc = &event->hw;
+	struct idxd_device *idxd;
+	int cntr = hwc->idx;
+
+	idxd = event_to_idxd(event);
+
+	return ioread64(CNTRDATA_REG(idxd, cntr));
+}
+
+static void perfmon_pmu_event_update(struct perf_event *event)
+{
+	struct idxd_device *idxd = event_to_idxd(event);
+	u64 prev_raw_count, new_raw_count, delta, p, n;
+	int shift = 64 - idxd->idxd_pmu->counter_width;
+	struct hw_perf_event *hwc = &event->hw;
+
+	do {
+		prev_raw_count = local64_read(&hwc->prev_count);
+		new_raw_count = perfmon_pmu_read_counter(event);
+	} while (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
+			new_raw_count) != prev_raw_count);
+
+	n = (new_raw_count << shift);
+	p = (prev_raw_count << shift);
+
+	delta = ((n - p) >> shift);
+
+	local64_add(delta, &event->count);
+}
+
+void perfmon_counter_overflow(struct idxd_device *idxd)
+{
+	int i, n_counters, max_loop = OVERFLOW_SIZE;
+	struct perf_event *event;
+	unsigned long ovfstatus;
+
+	n_counters = min(idxd->idxd_pmu->n_counters, OVERFLOW_SIZE);
+
+	ovfstatus = ioread32(OVFSTATUS_REG(idxd));
+
+	/*
+	 * While updating overflowed counters, other counters behind
+	 * them could overflow and be missed in a given pass.
+	 * Normally this could happen at most n_counters times, but in
+	 * theory a tiny counter width could result in continual
+	 * overflows and endless looping.  max_loop provides a
+	 * failsafe in that highly unlikely case.
+	 */
+	while (ovfstatus && max_loop--) {
+		/* Figure out which counter(s) overflowed */
+		for_each_set_bit(i, &ovfstatus, n_counters) {
+			unsigned long ovfstatus_clear = 0;
+
+			/* Update event->count for overflowed counter */
+			event = idxd->idxd_pmu->event_list[i];
+			perfmon_pmu_event_update(event);
+			/* Writing 1 to OVFSTATUS bit clears it */
+			set_bit(i, &ovfstatus_clear);
+			iowrite32(ovfstatus_clear, OVFSTATUS_REG(idxd));
+		}
+
+		ovfstatus = ioread32(OVFSTATUS_REG(idxd));
+	}
+
+	/*
+	 * Should never happen.  If so, it means a counter(s) looped
+	 * around twice while this handler was running.
+	 */
+	WARN_ON_ONCE(ovfstatus);
+}
+
+static inline void perfmon_reset_config(struct idxd_device *idxd)
+{
+	iowrite32(CONFIG_RESET, PERFRST_REG(idxd));
+	iowrite32(0, OVFSTATUS_REG(idxd));
+	iowrite32(0, PERFFRZ_REG(idxd));
+}
+
+static inline void perfmon_reset_counters(struct idxd_device *idxd)
+{
+	iowrite32(CNTR_RESET, PERFRST_REG(idxd));
+}
+
+static inline void perfmon_reset(struct idxd_device *idxd)
+{
+	perfmon_reset_config(idxd);
+	perfmon_reset_counters(idxd);
+}
+
+static void perfmon_pmu_event_start(struct perf_event *event, int mode)
+{
+	u32 flt_wq, flt_tc, flt_pg_sz, flt_xfer_sz, flt_eng = 0;
+	u64 cntr_cfg, cntrdata, event_enc, event_cat = 0;
+	struct hw_perf_event *hwc = &event->hw;
+	union filter_cfg flt_cfg;
+	union event_cfg event_cfg;
+	struct idxd_device *idxd;
+	int cntr;
+
+	idxd = event_to_idxd(event);
+
+	event->hw.idx = hwc->idx;
+	cntr = hwc->idx;
+
+	/* Obtain event category and event value from user space */
+	event_cfg.val = event->attr.config;
+	flt_cfg.val = event->attr.config1;
+	event_cat = event_cfg.event_cat;
+	event_enc = event_cfg.event_enc;
+
+	/* Obtain filter configuration from user space */
+	flt_wq = flt_cfg.wq;
+	flt_tc = flt_cfg.tc;
+	flt_pg_sz = flt_cfg.pg_sz;
+	flt_xfer_sz = flt_cfg.xfer_sz;
+	flt_eng = flt_cfg.eng;
+
+	if (flt_wq && test_bit(FLT_WQ, &idxd->idxd_pmu->supported_filters))
+		iowrite32(flt_wq, FLTCFG_REG(idxd, cntr, FLT_WQ));
+	if (flt_tc && test_bit(FLT_TC, &idxd->idxd_pmu->supported_filters))
+		iowrite32(flt_tc, FLTCFG_REG(idxd, cntr, FLT_TC));
+	if (flt_pg_sz && test_bit(FLT_PG_SZ, &idxd->idxd_pmu->supported_filters))
+		iowrite32(flt_pg_sz, FLTCFG_REG(idxd, cntr, FLT_PG_SZ));
+	if (flt_xfer_sz && test_bit(FLT_XFER_SZ, &idxd->idxd_pmu->supported_filters))
+		iowrite32(flt_xfer_sz, FLTCFG_REG(idxd, cntr, FLT_XFER_SZ));
+	if (flt_eng && test_bit(FLT_ENG, &idxd->idxd_pmu->supported_filters))
+		iowrite32(flt_eng, FLTCFG_REG(idxd, cntr, FLT_ENG));
+
+	/* Read the start value */
+	cntrdata = ioread64(CNTRDATA_REG(idxd, cntr));
+	local64_set(&event->hw.prev_count, cntrdata);
+
+	/* Set counter to event/category */
+	cntr_cfg = event_cat << CNTRCFG_CATEGORY_SHIFT;
+	cntr_cfg |= event_enc << CNTRCFG_EVENT_SHIFT;
+	/* Set interrupt on overflow and counter enable bits */
+	cntr_cfg |= (CNTRCFG_IRQ_OVERFLOW | CNTRCFG_ENABLE);
+
+	iowrite64(cntr_cfg, CNTRCFG_REG(idxd, cntr));
+}
+
+static void perfmon_pmu_event_stop(struct perf_event *event, int mode)
+{
+	struct hw_perf_event *hwc = &event->hw;
+	struct idxd_device *idxd;
+	int i, cntr = hwc->idx;
+	u64 cntr_cfg;
+
+	idxd = event_to_idxd(event);
+
+	/* remove this event from event list */
+	for (i = 0; i < idxd->idxd_pmu->n_events; i++) {
+		if (event != idxd->idxd_pmu->event_list[i])
+			continue;
+
+		for (++i; i < idxd->idxd_pmu->n_events; i++)
+			idxd->idxd_pmu->event_list[i - 1] = idxd->idxd_pmu->event_list[i];
+		--idxd->idxd_pmu->n_events;
+		break;
+	}
+
+	cntr_cfg = ioread64(CNTRCFG_REG(idxd, cntr));
+	cntr_cfg &= ~CNTRCFG_ENABLE;
+	iowrite64(cntr_cfg, CNTRCFG_REG(idxd, cntr));
+
+	if (mode == PERF_EF_UPDATE)
+		perfmon_pmu_event_update(event);
+
+	event->hw.idx = -1;
+	clear_bit(cntr, idxd->idxd_pmu->used_mask);
+}
+
+static void perfmon_pmu_event_del(struct perf_event *event, int mode)
+{
+	perfmon_pmu_event_stop(event, PERF_EF_UPDATE);
+}
+
+static int perfmon_pmu_event_add(struct perf_event *event, int flags)
+{
+	struct idxd_device *idxd = event_to_idxd(event);
+	struct idxd_pmu *idxd_pmu = idxd->idxd_pmu;
+	struct hw_perf_event *hwc = &event->hw;
+	int idx, n;
+
+	n = perfmon_collect_events(idxd_pmu, event, false);
+	if (n < 0)
+		return n;
+
+	hwc->state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
+	if (!(flags & PERF_EF_START))
+		hwc->state |= PERF_HES_ARCH;
+
+	idx = perfmon_assign_event(idxd_pmu, event);
+	if (idx < 0)
+		return idx;
+
+	perfmon_assign_hw_event(idxd_pmu, event, idx);
+
+	if (flags & PERF_EF_START)
+		perfmon_pmu_event_start(event, 0);
+
+	idxd_pmu->n_events = n;
+
+	return 0;
+}
+
+static void enable_perfmon_pmu(struct idxd_device *idxd)
+{
+	iowrite32(COUNTER_UNFREEZE, PERFFRZ_REG(idxd));
+}
+
+static void disable_perfmon_pmu(struct idxd_device *idxd)
+{
+	iowrite32(COUNTER_FREEZE, PERFFRZ_REG(idxd));
+}
+
+static void perfmon_pmu_enable(struct pmu *pmu)
+{
+	struct idxd_device *idxd = pmu_to_idxd(pmu);
+
+	enable_perfmon_pmu(idxd);
+}
+
+static void perfmon_pmu_disable(struct pmu *pmu)
+{
+	struct idxd_device *idxd = pmu_to_idxd(pmu);
+
+	disable_perfmon_pmu(idxd);
+}
+
+static void skip_filter(int i)
+{
+	int j;
+
+	for (j = i; j < PERFMON_FILTERS_MAX; j++)
+		perfmon_format_attrs[PERFMON_FILTERS_START + j] =
+			perfmon_format_attrs[PERFMON_FILTERS_START + j + 1];
+}
+
+static void idxd_pmu_init(struct idxd_pmu *idxd_pmu)
+{
+	int i;
+
+	for (i = 0 ; i < PERFMON_FILTERS_MAX; i++) {
+		if (!test_bit(i, &idxd_pmu->supported_filters))
+			skip_filter(i);
+	}
+
+	idxd_pmu->pmu.name		= idxd_pmu->name;
+	idxd_pmu->pmu.attr_groups	= perfmon_attr_groups;
+	idxd_pmu->pmu.task_ctx_nr	= perf_invalid_context;
+	idxd_pmu->pmu.event_init	= perfmon_pmu_event_init;
+	idxd_pmu->pmu.pmu_enable	= perfmon_pmu_enable,
+	idxd_pmu->pmu.pmu_disable	= perfmon_pmu_disable,
+	idxd_pmu->pmu.add		= perfmon_pmu_event_add;
+	idxd_pmu->pmu.del		= perfmon_pmu_event_del;
+	idxd_pmu->pmu.start		= perfmon_pmu_event_start;
+	idxd_pmu->pmu.stop		= perfmon_pmu_event_stop;
+	idxd_pmu->pmu.read		= perfmon_pmu_event_update;
+	idxd_pmu->pmu.capabilities	= PERF_PMU_CAP_NO_EXCLUDE;
+	idxd_pmu->pmu.module		= THIS_MODULE;
+}
+
+void perfmon_pmu_remove(struct idxd_device *idxd)
+{
+	if (!idxd->idxd_pmu)
+		return;
+
+	cpuhp_state_remove_instance(cpuhp_slot, &idxd->idxd_pmu->cpuhp_node);
+	perf_pmu_unregister(&idxd->idxd_pmu->pmu);
+	kfree(idxd->idxd_pmu);
+	idxd->idxd_pmu = NULL;
+}
+
+static int perf_event_cpu_online(unsigned int cpu, struct hlist_node *node)
+{
+	struct idxd_pmu *idxd_pmu;
+
+	idxd_pmu = hlist_entry_safe(node, typeof(*idxd_pmu), cpuhp_node);
+
+	/* select the first online CPU as the designated reader */
+	if (cpumask_empty(&perfmon_dsa_cpu_mask)) {
+		cpumask_set_cpu(cpu, &perfmon_dsa_cpu_mask);
+		idxd_pmu->cpu = cpu;
+	}
+
+	return 0;
+}
+
+static int perf_event_cpu_offline(unsigned int cpu, struct hlist_node *node)
+{
+	struct idxd_pmu *idxd_pmu;
+	unsigned int target;
+
+	idxd_pmu = hlist_entry_safe(node, typeof(*idxd_pmu), cpuhp_node);
+
+	if (!cpumask_test_and_clear_cpu(cpu, &perfmon_dsa_cpu_mask))
+		return 0;
+
+	target = cpumask_any_but(cpu_online_mask, cpu);
+
+	/* migrate events if there is a valid target */
+	if (target < nr_cpu_ids)
+		cpumask_set_cpu(target, &perfmon_dsa_cpu_mask);
+	else
+		target = -1;
+
+	perf_pmu_migrate_context(&idxd_pmu->pmu, cpu, target);
+
+	return 0;
+}
+
+int perfmon_pmu_init(struct idxd_device *idxd)
+{
+	union idxd_perfcap perfcap;
+	struct idxd_pmu *idxd_pmu;
+	int rc = -ENODEV;
+
+	/*
+	 * perfmon module initialization failed, nothing to do
+	 */
+	if (!cpuhp_set_up)
+		return -ENODEV;
+
+	/*
+	 * If perfmon_offset or num_counters is 0, it means perfmon is
+	 * not supported on this hardware.
+	 */
+	if (idxd->perfmon_offset == 0)
+		return -ENODEV;
+
+	idxd_pmu = kzalloc(sizeof(*idxd_pmu), GFP_KERNEL);
+	if (!idxd_pmu)
+		return -ENOMEM;
+
+	idxd_pmu->idxd = idxd;
+	idxd->idxd_pmu = idxd_pmu;
+
+	if (idxd->data->type == IDXD_TYPE_DSA) {
+		rc = sprintf(idxd_pmu->name, "dsa%d", idxd->id);
+		if (rc < 0)
+			goto free;
+	} else if (idxd->data->type == IDXD_TYPE_IAX) {
+		rc = sprintf(idxd_pmu->name, "iax%d", idxd->id);
+		if (rc < 0)
+			goto free;
+	} else {
+		goto free;
+	}
+
+	perfmon_reset(idxd);
+
+	perfcap.bits = ioread64(PERFCAP_REG(idxd));
+
+	/*
+	 * If total perf counter is 0, stop further registration.
+	 * This is necessary in order to support driver running on
+	 * guest which does not have pmon support.
+	 */
+	if (perfcap.num_perf_counter == 0)
+		goto free;
+
+	/* A counter width of 0 means it can't count */
+	if (perfcap.counter_width == 0)
+		goto free;
+
+	/* Overflow interrupt and counter freeze support must be available */
+	if (!perfcap.overflow_interrupt || !perfcap.counter_freeze)
+		goto free;
+
+	/* Number of event categories cannot be 0 */
+	if (perfcap.num_event_category == 0)
+		goto free;
+
+	/*
+	 * We don't support per-counter capabilities for now.
+	 */
+	if (perfcap.cap_per_counter)
+		goto free;
+
+	idxd_pmu->n_event_categories = perfcap.num_event_category;
+	idxd_pmu->supported_event_categories = perfcap.global_event_category;
+	idxd_pmu->per_counter_caps_supported = perfcap.cap_per_counter;
+
+	/* check filter capability.  If 0, then filters are not supported */
+	idxd_pmu->supported_filters = perfcap.filter;
+	if (perfcap.filter)
+		idxd_pmu->n_filters = hweight8(perfcap.filter);
+
+	/* Store the total number of counters categories, and counter width */
+	idxd_pmu->n_counters = perfcap.num_perf_counter;
+	idxd_pmu->counter_width = perfcap.counter_width;
+
+	idxd_pmu_init(idxd_pmu);
+
+	rc = perf_pmu_register(&idxd_pmu->pmu, idxd_pmu->name, -1);
+	if (rc)
+		goto free;
+
+	rc = cpuhp_state_add_instance(cpuhp_slot, &idxd_pmu->cpuhp_node);
+	if (rc) {
+		perf_pmu_unregister(&idxd->idxd_pmu->pmu);
+		goto free;
+	}
+out:
+	return rc;
+free:
+	kfree(idxd_pmu);
+	idxd->idxd_pmu = NULL;
+
+	goto out;
+}
+
+void __init perfmon_init(void)
+{
+	int rc = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN,
+					 "driver/dma/idxd/perf:online",
+					 perf_event_cpu_online,
+					 perf_event_cpu_offline);
+	if (WARN_ON(rc < 0))
+		return;
+
+	cpuhp_slot = rc;
+	cpuhp_set_up = true;
+}
+
+void __exit perfmon_exit(void)
+{
+	if (cpuhp_set_up)
+		cpuhp_remove_multi_state(cpuhp_slot);
+}
diff --git a/drivers/dma/idxd/perfmon.h b/drivers/dma/idxd/perfmon.h
new file mode 100644
index 000000000000..9a081a1bc605
--- /dev/null
+++ b/drivers/dma/idxd/perfmon.h
@@ -0,0 +1,119 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright(c) 2020 Intel Corporation. All rights rsvd. */
+
+#ifndef _PERFMON_H_
+#define _PERFMON_H_
+
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/sbitmap.h>
+#include <linux/dmaengine.h>
+#include <linux/percpu-rwsem.h>
+#include <linux/wait.h>
+#include <linux/cdev.h>
+#include <linux/uuid.h>
+#include <linux/idxd.h>
+#include <linux/perf_event.h>
+#include "registers.h"
+
+static inline struct idxd_pmu *event_to_pmu(struct perf_event *event)
+{
+	struct idxd_pmu *idxd_pmu;
+	struct pmu *pmu;
+
+	pmu = event->pmu;
+	idxd_pmu = container_of(pmu, struct idxd_pmu, pmu);
+
+	return idxd_pmu;
+}
+
+static inline struct idxd_device *event_to_idxd(struct perf_event *event)
+{
+	struct idxd_pmu *idxd_pmu;
+	struct pmu *pmu;
+
+	pmu = event->pmu;
+	idxd_pmu = container_of(pmu, struct idxd_pmu, pmu);
+
+	return idxd_pmu->idxd;
+}
+
+static inline struct idxd_device *pmu_to_idxd(struct pmu *pmu)
+{
+	struct idxd_pmu *idxd_pmu;
+
+	idxd_pmu = container_of(pmu, struct idxd_pmu, pmu);
+
+	return idxd_pmu->idxd;
+}
+
+enum dsa_perf_events {
+	DSA_PERF_EVENT_WQ = 0,
+	DSA_PERF_EVENT_ENGINE,
+	DSA_PERF_EVENT_ADDR_TRANS,
+	DSA_PERF_EVENT_OP,
+	DSA_PERF_EVENT_COMPL,
+	DSA_PERF_EVENT_MAX,
+};
+
+enum filter_enc {
+	FLT_WQ = 0,
+	FLT_TC,
+	FLT_PG_SZ,
+	FLT_XFER_SZ,
+	FLT_ENG,
+	FLT_MAX,
+};
+
+#define CONFIG_RESET		0x0000000000000001
+#define CNTR_RESET		0x0000000000000002
+#define CNTR_ENABLE		0x0000000000000001
+#define INTR_OVFL		0x0000000000000002
+
+#define COUNTER_FREEZE		0x00000000FFFFFFFF
+#define COUNTER_UNFREEZE	0x0000000000000000
+#define OVERFLOW_SIZE		32
+
+#define CNTRCFG_ENABLE		BIT(0)
+#define CNTRCFG_IRQ_OVERFLOW	BIT(1)
+#define CNTRCFG_CATEGORY_SHIFT	8
+#define CNTRCFG_EVENT_SHIFT	32
+
+#define PERFMON_TABLE_OFFSET(_idxd)				\
+({								\
+	typeof(_idxd) __idxd = (_idxd);				\
+	((__idxd)->reg_base + (__idxd)->perfmon_offset);	\
+})
+#define PERFMON_REG_OFFSET(idxd, offset)			\
+	(PERFMON_TABLE_OFFSET(idxd) + (offset))
+
+#define PERFCAP_REG(idxd)	(PERFMON_REG_OFFSET(idxd, IDXD_PERFCAP_OFFSET))
+#define PERFRST_REG(idxd)	(PERFMON_REG_OFFSET(idxd, IDXD_PERFRST_OFFSET))
+#define OVFSTATUS_REG(idxd)	(PERFMON_REG_OFFSET(idxd, IDXD_OVFSTATUS_OFFSET))
+#define PERFFRZ_REG(idxd)	(PERFMON_REG_OFFSET(idxd, IDXD_PERFFRZ_OFFSET))
+
+#define FLTCFG_REG(idxd, cntr, flt)				\
+	(PERFMON_REG_OFFSET(idxd, IDXD_FLTCFG_OFFSET) +	((cntr) * 32) + ((flt) * 4))
+
+#define CNTRCFG_REG(idxd, cntr)					\
+	(PERFMON_REG_OFFSET(idxd, IDXD_CNTRCFG_OFFSET) + ((cntr) * 8))
+#define CNTRDATA_REG(idxd, cntr)					\
+	(PERFMON_REG_OFFSET(idxd, IDXD_CNTRDATA_OFFSET) + ((cntr) * 8))
+#define CNTRCAP_REG(idxd, cntr)					\
+	(PERFMON_REG_OFFSET(idxd, IDXD_CNTRCAP_OFFSET) + ((cntr) * 8))
+
+#define EVNTCAP_REG(idxd, category) \
+	(PERFMON_REG_OFFSET(idxd, IDXD_EVNTCAP_OFFSET) + ((category) * 8))
+
+#define DEFINE_PERFMON_FORMAT_ATTR(_name, _format)			\
+static ssize_t __perfmon_idxd_##_name##_show(struct kobject *kobj,	\
+				struct kobj_attribute *attr,		\
+				char *page)				\
+{									\
+	BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE);			\
+	return sprintf(page, _format "\n");				\
+}									\
+static struct kobj_attribute format_attr_idxd_##_name =			\
+	__ATTR(_name, 0444, __perfmon_idxd_##_name##_show, NULL)
+
+#endif
diff --git a/drivers/dma/idxd/registers.h b/drivers/dma/idxd/registers.h
index 6c11375cc56a..c970c3f025f0 100644
--- a/drivers/dma/idxd/registers.h
+++ b/drivers/dma/idxd/registers.h
@@ -386,4 +386,112 @@ union wqcfg {
 #define GRPENGCFG_OFFSET(idxd_dev, n) ((idxd_dev)->grpcfg_offset + (n) * GRPCFG_SIZE + 32)
 #define GRPFLGCFG_OFFSET(idxd_dev, n) ((idxd_dev)->grpcfg_offset + (n) * GRPCFG_SIZE + 40)
 
+/* Following is performance monitor registers */
+#define IDXD_PERFCAP_OFFSET		0x0
+union idxd_perfcap {
+	struct {
+		u64 num_perf_counter:6;
+		u64 rsvd1:2;
+		u64 counter_width:8;
+		u64 num_event_category:4;
+		u64 global_event_category:16;
+		u64 filter:8;
+		u64 rsvd2:8;
+		u64 cap_per_counter:1;
+		u64 writeable_counter:1;
+		u64 counter_freeze:1;
+		u64 overflow_interrupt:1;
+		u64 rsvd3:8;
+	};
+	u64 bits;
+} __packed;
+
+#define IDXD_EVNTCAP_OFFSET		0x80
+union idxd_evntcap {
+	struct {
+		u64 events:28;
+		u64 rsvd:36;
+	};
+	u64 bits;
+} __packed;
+
+struct idxd_event {
+	union {
+		struct {
+			u32 event_category:4;
+			u32 events:28;
+		};
+		u32 val;
+	};
+} __packed;
+
+#define IDXD_CNTRCAP_OFFSET		0x800
+struct idxd_cntrcap {
+	union {
+		struct {
+			u32 counter_width:8;
+			u32 rsvd:20;
+			u32 num_events:4;
+		};
+		u32 val;
+	};
+	struct idxd_event events[];
+} __packed;
+
+#define IDXD_PERFRST_OFFSET		0x10
+union idxd_perfrst {
+	struct {
+		u32 perfrst_config:1;
+		u32 perfrst_counter:1;
+		u32 rsvd:30;
+	};
+	u32 val;
+} __packed;
+
+#define IDXD_OVFSTATUS_OFFSET		0x30
+#define IDXD_PERFFRZ_OFFSET		0x20
+#define IDXD_CNTRCFG_OFFSET		0x100
+union idxd_cntrcfg {
+	struct {
+		u64 enable:1;
+		u64 interrupt_ovf:1;
+		u64 global_freeze_ovf:1;
+		u64 rsvd1:5;
+		u64 event_category:4;
+		u64 rsvd2:20;
+		u64 events:28;
+		u64 rsvd3:4;
+	};
+	u64 val;
+} __packed;
+
+#define IDXD_FLTCFG_OFFSET		0x300
+
+#define IDXD_CNTRDATA_OFFSET		0x200
+union idxd_cntrdata {
+	struct {
+		u64 event_count_value;
+	};
+	u64 val;
+} __packed;
+
+union event_cfg {
+	struct {
+		u64 event_cat:4;
+		u64 event_enc:28;
+	};
+	u64 val;
+} __packed;
+
+union filter_cfg {
+	struct {
+		u64 wq:32;
+		u64 tc:8;
+		u64 pg_sz:4;
+		u64 xfer_sz:8;
+		u64 eng:8;
+	};
+	u64 val;
+} __packed;
+
 #endif
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index f14adb882338..264d911424c0 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -167,6 +167,7 @@ enum cpuhp_state {
 	CPUHP_AP_PERF_X86_RAPL_ONLINE,
 	CPUHP_AP_PERF_X86_CQM_ONLINE,
 	CPUHP_AP_PERF_X86_CSTATE_ONLINE,
+	CPUHP_AP_PERF_X86_IDXD_ONLINE,
 	CPUHP_AP_PERF_S390_CF_ONLINE,
 	CPUHP_AP_PERF_S390_CFD_ONLINE,
 	CPUHP_AP_PERF_S390_SF_ONLINE,
-- 
cgit v1.2.3


From 0bde4444ec44b8e64bbd4af72fcaef58bcdbd4ce Mon Sep 17 00:00:00 2001
From: Tom Zanussi <tom.zanussi@linux.intel.com>
Date: Sat, 24 Apr 2021 10:04:16 -0500
Subject: dmaengine: idxd: Enable IDXD performance monitor support

Add the code needed in the main IDXD driver to interface with the IDXD
perfmon implementation.

[ Based on work originally by Jing Lin. ]

Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Link: https://lore.kernel.org/r/a5564a5583911565d31c2af9234218c5166c4b2c.1619276133.git.zanussi@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/init.c | 9 +++++++++
 drivers/dma/idxd/irq.c  | 5 +----
 2 files changed, 10 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index 8003f8a25fff..2a926bef87f2 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -21,6 +21,7 @@
 #include "../dmaengine.h"
 #include "registers.h"
 #include "idxd.h"
+#include "perfmon.h"
 
 MODULE_VERSION(IDXD_DRIVER_VERSION);
 MODULE_LICENSE("GPL v2");
@@ -541,6 +542,10 @@ static int idxd_probe(struct idxd_device *idxd)
 
 	idxd->major = idxd_cdev_get_major(idxd);
 
+	rc = perfmon_pmu_init(idxd);
+	if (rc < 0)
+		dev_warn(dev, "Failed to initialize perfmon. No PMU support: %d\n", rc);
+
 	dev_dbg(dev, "IDXD device %d probed successfully\n", idxd->id);
 	return 0;
 
@@ -720,6 +725,7 @@ static void idxd_remove(struct pci_dev *pdev)
 	if (device_pasid_enabled(idxd))
 		idxd_disable_system_pasid(idxd);
 	idxd_unregister_devices(idxd);
+	perfmon_pmu_remove(idxd);
 	iommu_dev_disable_feature(&pdev->dev, IOMMU_DEV_FEAT_SVA);
 }
 
@@ -749,6 +755,8 @@ static int __init idxd_init_module(void)
 	else
 		support_enqcmd = true;
 
+	perfmon_init();
+
 	err = idxd_register_bus_type();
 	if (err < 0)
 		return err;
@@ -782,5 +790,6 @@ static void __exit idxd_exit_module(void)
 	pci_unregister_driver(&idxd_pci_driver);
 	idxd_cdev_remove();
 	idxd_unregister_bus_type();
+	perfmon_exit();
 }
 module_exit(idxd_exit_module);
diff --git a/drivers/dma/idxd/irq.c b/drivers/dma/idxd/irq.c
index afee571e0194..ae68e1e5487a 100644
--- a/drivers/dma/idxd/irq.c
+++ b/drivers/dma/idxd/irq.c
@@ -156,11 +156,8 @@ static int process_misc_interrupts(struct idxd_device *idxd, u32 cause)
 	}
 
 	if (cause & IDXD_INTC_PERFMON_OVFL) {
-		/*
-		 * Driver does not utilize perfmon counter overflow interrupt
-		 * yet.
-		 */
 		val |= IDXD_INTC_PERFMON_OVFL;
+		perfmon_counter_overflow(idxd);
 	}
 
 	val ^= cause;
-- 
cgit v1.2.3


From fcc96cef8a185e55c25d25f4f698f51e1a030911 Mon Sep 17 00:00:00 2001
From: Zheng Yongjun <zhengyongjun3@huawei.com>
Date: Fri, 8 Jan 2021 17:24:46 +0800
Subject: leds-lm3642: convert comma to semicolon

Replace a comma between expression statements by a semicolon.

Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
---
 drivers/leds/leds-lm3642.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/leds/leds-lm3642.c b/drivers/leds/leds-lm3642.c
index 8007b82985a8..435309154e6b 100644
--- a/drivers/leds/leds-lm3642.c
+++ b/drivers/leds/leds-lm3642.c
@@ -339,7 +339,7 @@ static int lm3642_probe(struct i2c_client *client,
 	chip->cdev_flash.max_brightness = 16;
 	chip->cdev_flash.brightness_set_blocking = lm3642_strobe_brightness_set;
 	chip->cdev_flash.default_trigger = "flash";
-	chip->cdev_flash.groups = lm3642_flash_groups,
+	chip->cdev_flash.groups = lm3642_flash_groups;
 	err = led_classdev_register(&client->dev, &chip->cdev_flash);
 	if (err < 0) {
 		dev_err(chip->dev, "failed to register flash\n");
@@ -351,7 +351,7 @@ static int lm3642_probe(struct i2c_client *client,
 	chip->cdev_torch.max_brightness = 8;
 	chip->cdev_torch.brightness_set_blocking = lm3642_torch_brightness_set;
 	chip->cdev_torch.default_trigger = "torch";
-	chip->cdev_torch.groups = lm3642_torch_groups,
+	chip->cdev_torch.groups = lm3642_torch_groups;
 	err = led_classdev_register(&client->dev, &chip->cdev_torch);
 	if (err < 0) {
 		dev_err(chip->dev, "failed to register torch\n");
-- 
cgit v1.2.3


From ec50536b7840dde085185d9570fa19d0baf5042c Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Mon, 22 Feb 2021 13:49:39 +0000
Subject: leds: lgm: Fix spelling mistake "prepate" -> "prepare"

There is a spelling mistake in a dev_err error message. Fix it.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
---
 drivers/leds/blink/leds-lgm-sso.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/leds/blink/leds-lgm-sso.c b/drivers/leds/blink/leds-lgm-sso.c
index 7d5c9ca007d6..6a63846d10b5 100644
--- a/drivers/leds/blink/leds-lgm-sso.c
+++ b/drivers/leds/blink/leds-lgm-sso.c
@@ -793,7 +793,7 @@ static int intel_sso_led_probe(struct platform_device *pdev)
 
 	ret = clk_prepare_enable(priv->gclk);
 	if (ret) {
-		dev_err(dev, "Failed to prepate/enable sso gate clock!\n");
+		dev_err(dev, "Failed to prepare/enable sso gate clock!\n");
 		return ret;
 	}
 
-- 
cgit v1.2.3


From 1cfa807b06afd54488512bacef7cb5023437f178 Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Tue, 16 Mar 2021 14:39:46 +0100
Subject: leds: LEDS_BLINK_LGM should depend on X86

The Intel Lightning Mountain (LGM) Serial Shift Output controller (SSO)
is only present on Intel Lightning Mountain SoCs.  Hence add a
dependency on X86, to prevent asking the user about this driver when
configuring a kernel without Intel Lightning Mountain platform support.

While at it, merge the other dependencies into a single statement.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
---
 drivers/leds/blink/Kconfig | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/leds/blink/Kconfig b/drivers/leds/blink/Kconfig
index 964c5037d9a5..59ba81e40e85 100644
--- a/drivers/leds/blink/Kconfig
+++ b/drivers/leds/blink/Kconfig
@@ -1,9 +1,7 @@
 config LEDS_LGM
        tristate "LED support for LGM SoC series"
-       depends on GPIOLIB
-       depends on LEDS_CLASS
-       depends on MFD_SYSCON
-       depends on OF
+       depends on X86 || COMPILE_TEST
+       depends on GPIOLIB && LEDS_CLASS && MFD_SYSCON && OF
        help
          This option enables support for LEDs connected to GPIO lines on
          Lightning Mountain (LGM) SoC. Lightning Mountain is a AnyWAN
-- 
cgit v1.2.3


From 5fe09e16c689eae88a151c2f8199c73cf6f18d7d Mon Sep 17 00:00:00 2001
From: Tian Tao <tiantao6@hisilicon.com>
Date: Mon, 22 Mar 2021 10:37:16 +0800
Subject: leds: trigger: pattern: Switch to using the new API kobj_to_dev()

Switch to using the new API kobj_to_dev() to fix the below warnning:
./drivers/leds/trigger/ledtrig-pattern.c:336:60-61: WARNING opportunity
for kobj_to_dev()

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
---
 drivers/leds/trigger/ledtrig-pattern.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/leds/trigger/ledtrig-pattern.c b/drivers/leds/trigger/ledtrig-pattern.c
index 4d138d5317e9..43a265dc4696 100644
--- a/drivers/leds/trigger/ledtrig-pattern.c
+++ b/drivers/leds/trigger/ledtrig-pattern.c
@@ -333,7 +333,7 @@ static DEVICE_ATTR_RW(hw_pattern);
 static umode_t pattern_trig_attrs_mode(struct kobject *kobj,
 				       struct attribute *attr, int index)
 {
-	struct device *dev = container_of(kobj, struct device, kobj);
+	struct device *dev = kobj_to_dev(kobj);
 	struct led_classdev *led_cdev = dev_get_drvdata(dev);
 
 	if (attr == &dev_attr_repeat.attr || attr == &dev_attr_pattern.attr)
-- 
cgit v1.2.3


From 23a700455a1bc55f3ea20675e574181b8c129306 Mon Sep 17 00:00:00 2001
From: Stefan Riedmueller <s.riedmueller@phytec.de>
Date: Wed, 14 Apr 2021 13:51:24 +0200
Subject: leds: pca9532: Assign gpio base dynamically

When using devicetree, gpio_base holds its initial zero value which can
lead to a rejection if another gpio controller already occupies this
base. To prevent that collision let the gpio base be assigned dynamically.

Signed-off-by: Stefan Riedmueller <s.riedmueller@phytec.de>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
---
 drivers/leds/leds-pca9532.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'drivers')

diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c
index 27d027165472..017794bb87ae 100644
--- a/drivers/leds/leds-pca9532.c
+++ b/drivers/leds/leds-pca9532.c
@@ -480,6 +480,8 @@ pca9532_of_populate_pdata(struct device *dev, struct device_node *np)
 	if (!pdata)
 		return ERR_PTR(-ENOMEM);
 
+	pdata->gpio_base = -1;
+
 	of_property_read_u8_array(np, "nxp,pwm", &pdata->pwm[0],
 				  ARRAY_SIZE(pdata->pwm));
 	of_property_read_u8_array(np, "nxp,psc", &pdata->psc[0],
-- 
cgit v1.2.3


From e1d3f3268b0e512ceb811dd4765e476626bde71c Mon Sep 17 00:00:00 2001
From: Krzysztof Wilczyński <kw@linux.com>
Date: Fri, 16 Apr 2021 20:58:37 +0000
Subject: PCI/sysfs: Convert "config" to static attribute
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The "config" sysfs attribute allows access to either the legacy (PCI and
PCI-X Mode 1) or the extended (PCI-X Mode 2 and PCIe) device configuration
space.  Previously it was dynamically created either when a device was
added (for hot-added devices) or via a late_initcall (for devices present
at boot):

  pci_bus_add_devices
    pci_bus_add_device
      pci_create_sysfs_dev_files
        if (!sysfs_initialized)
	  return
	sysfs_create_bin_file           # for hot-added devices

  pci_sysfs_init                        # late_initcall
    sysfs_initialized = 1
    for_each_pci_dev(pdev)
      pci_create_sysfs_dev_files(pdev)  # for devices present at boot

And dynamically removed when the PCI device is stopped and removed:

  pci_stop_bus_device
    pci_stop_dev
      pci_remove_sysfs_dev_files
        sysfs_remove_bin_file

This attribute does not need to be created or removed dynamically, so we
can use a static attribute so the device model takes care of addition and
removal automatically.

Convert "config" to a static attribute and use the .is_bin_visible()
callback to set the correct object size (either 256 bytes or 4 KiB) at
runtime.

The pci_sysfs_init() scheme was added in the pre-git era by
https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git/commit/drivers/pci/pci-sysfs.c?id=f6d553444da2

[bhelgaas: commit log]
Suggested-by: Oliver O'Halloran <oohall@gmail.com>
Link: https://lore.kernel.org/r/CAOSf1CHss03DBSDO4PmTtMp0tCEu5kScn704ZEwLKGXQzBfqaA@mail.gmail.com
Link: https://lore.kernel.org/r/20210416205856.3234481-2-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci-sysfs.c | 64 +++++++++++++++++++------------------------------
 1 file changed, 25 insertions(+), 39 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index f8afd54ca3e1..dc14daf404f5 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -808,6 +808,29 @@ static ssize_t pci_write_config(struct file *filp, struct kobject *kobj,
 
 	return count;
 }
+static BIN_ATTR(config, 0644, pci_read_config, pci_write_config, 0);
+
+static struct bin_attribute *pci_dev_config_attrs[] = {
+	&bin_attr_config,
+	NULL,
+};
+
+static umode_t pci_dev_config_attr_is_visible(struct kobject *kobj,
+					      struct bin_attribute *a, int n)
+{
+	struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
+
+	a->size = PCI_CFG_SPACE_SIZE;
+	if (pdev->cfg_size > PCI_CFG_SPACE_SIZE)
+		a->size = PCI_CFG_SPACE_EXP_SIZE;
+
+	return a->attr.mode;
+}
+
+static const struct attribute_group pci_dev_config_attr_group = {
+	.bin_attrs = pci_dev_config_attrs,
+	.is_bin_visible = pci_dev_config_attr_is_visible,
+};
 
 #ifdef HAVE_PCI_LEGACY
 /**
@@ -1284,26 +1307,6 @@ static ssize_t pci_read_rom(struct file *filp, struct kobject *kobj,
 	return count;
 }
 
-static const struct bin_attribute pci_config_attr = {
-	.attr =	{
-		.name = "config",
-		.mode = 0644,
-	},
-	.size = PCI_CFG_SPACE_SIZE,
-	.read = pci_read_config,
-	.write = pci_write_config,
-};
-
-static const struct bin_attribute pcie_config_attr = {
-	.attr =	{
-		.name = "config",
-		.mode = 0644,
-	},
-	.size = PCI_CFG_SPACE_EXP_SIZE,
-	.read = pci_read_config,
-	.write = pci_write_config,
-};
-
 static ssize_t reset_store(struct device *dev, struct device_attribute *attr,
 			   const char *buf, size_t count)
 {
@@ -1355,16 +1358,9 @@ int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev)
 	if (!sysfs_initialized)
 		return -EACCES;
 
-	if (pdev->cfg_size > PCI_CFG_SPACE_SIZE)
-		retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);
-	else
-		retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
-	if (retval)
-		goto err;
-
 	retval = pci_create_resource_files(pdev);
 	if (retval)
-		goto err_config_file;
+		goto err;
 
 	/* If the device has a ROM, try to expose it in sysfs. */
 	rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
@@ -1405,11 +1401,6 @@ err_rom_file:
 	}
 err_resource_files:
 	pci_remove_resource_files(pdev);
-err_config_file:
-	if (pdev->cfg_size > PCI_CFG_SPACE_SIZE)
-		sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
-	else
-		sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
 err:
 	return retval;
 }
@@ -1435,12 +1426,6 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
 		return;
 
 	pci_remove_capabilities_sysfs(pdev);
-
-	if (pdev->cfg_size > PCI_CFG_SPACE_SIZE)
-		sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
-	else
-		sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
-
 	pci_remove_resource_files(pdev);
 
 	if (pdev->rom_attr) {
@@ -1540,6 +1525,7 @@ static const struct attribute_group pci_dev_group = {
 
 const struct attribute_group *pci_dev_groups[] = {
 	&pci_dev_group,
+	&pci_dev_config_attr_group,
 	NULL,
 };
 
-- 
cgit v1.2.3


From 527139d738d7f2e9f929c752eebf3cbf0f74c754 Mon Sep 17 00:00:00 2001
From: Krzysztof Wilczyński <kw@linux.com>
Date: Fri, 16 Apr 2021 20:58:38 +0000
Subject: PCI/sysfs: Convert "rom" to static attribute
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The "rom" sysfs attribute allows access to the PCI Option ROM.  Previously
it was dynamically created either by pci_bus_add_device() or the
pci_sysfs_init() initcall, but since it doesn't need to be created or
removed dynamically, we can use a static attribute so the device model
takes care of addition and removal automatically.

Convert "rom" to a static attribute and use the .is_bin_visible() callback
to set the correct object size based on the ROM size.

Remove "rom_attr" from the struct pci_dev since it is no longer needed.

This attribute was added in the pre-git era by https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git/commit/drivers/pci/pci-sysfs.c?id=f6d553444da2

[bhelgaas: commit log]
Suggested-by: Oliver O'Halloran <oohall@gmail.com>
Link: https://lore.kernel.org/r/20210416205856.3234481-3-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci-sysfs.c | 67 +++++++++++++++++++++----------------------------
 include/linux/pci.h     |  1 -
 2 files changed, 29 insertions(+), 39 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index dc14daf404f5..fa8373685140 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -1306,6 +1306,33 @@ static ssize_t pci_read_rom(struct file *filp, struct kobject *kobj,
 
 	return count;
 }
+static BIN_ATTR(rom, 0600, pci_read_rom, pci_write_rom, 0);
+
+static struct bin_attribute *pci_dev_rom_attrs[] = {
+	&bin_attr_rom,
+	NULL,
+};
+
+static umode_t pci_dev_rom_attr_is_visible(struct kobject *kobj,
+					   struct bin_attribute *a, int n)
+{
+	struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
+	size_t rom_size;
+
+	/* If the device has a ROM, try to expose it in sysfs. */
+	rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
+	if (!rom_size)
+		return 0;
+
+	a->size = rom_size;
+
+	return a->attr.mode;
+}
+
+static const struct attribute_group pci_dev_rom_attr_group = {
+	.bin_attrs = pci_dev_rom_attrs,
+	.is_bin_visible = pci_dev_rom_attr_is_visible,
+};
 
 static ssize_t reset_store(struct device *dev, struct device_attribute *attr,
 			   const char *buf, size_t count)
@@ -1352,8 +1379,6 @@ error:
 int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev)
 {
 	int retval;
-	int rom_size;
-	struct bin_attribute *attr;
 
 	if (!sysfs_initialized)
 		return -EACCES;
@@ -1362,43 +1387,15 @@ int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev)
 	if (retval)
 		goto err;
 
-	/* If the device has a ROM, try to expose it in sysfs. */
-	rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
-	if (rom_size) {
-		attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
-		if (!attr) {
-			retval = -ENOMEM;
-			goto err_resource_files;
-		}
-		sysfs_bin_attr_init(attr);
-		attr->size = rom_size;
-		attr->attr.name = "rom";
-		attr->attr.mode = 0600;
-		attr->read = pci_read_rom;
-		attr->write = pci_write_rom;
-		retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);
-		if (retval) {
-			kfree(attr);
-			goto err_resource_files;
-		}
-		pdev->rom_attr = attr;
-	}
-
 	/* add sysfs entries for various capabilities */
 	retval = pci_create_capabilities_sysfs(pdev);
 	if (retval)
-		goto err_rom_file;
+		goto err_resource_files;
 
 	pci_create_firmware_label_files(pdev);
 
 	return 0;
 
-err_rom_file:
-	if (pdev->rom_attr) {
-		sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
-		kfree(pdev->rom_attr);
-		pdev->rom_attr = NULL;
-	}
 err_resource_files:
 	pci_remove_resource_files(pdev);
 err:
@@ -1427,13 +1424,6 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
 
 	pci_remove_capabilities_sysfs(pdev);
 	pci_remove_resource_files(pdev);
-
-	if (pdev->rom_attr) {
-		sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
-		kfree(pdev->rom_attr);
-		pdev->rom_attr = NULL;
-	}
-
 	pci_remove_firmware_label_files(pdev);
 }
 
@@ -1526,6 +1516,7 @@ static const struct attribute_group pci_dev_group = {
 const struct attribute_group *pci_dev_groups[] = {
 	&pci_dev_group,
 	&pci_dev_config_attr_group,
+	&pci_dev_rom_attr_group,
 	NULL,
 };
 
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 86c799c97b77..45f1fef80b50 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -458,7 +458,6 @@ struct pci_dev {
 
 	u32		saved_config_space[16]; /* Config space saved at suspend time */
 	struct hlist_head saved_cap_space;
-	struct bin_attribute *rom_attr;		/* Attribute descriptor for sysfs ROM entry */
 	int		rom_attr_enabled;	/* Display of ROM attribute enabled? */
 	struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
 	struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
-- 
cgit v1.2.3


From f42c35ea3b137c01b3e073232131674be8efb924 Mon Sep 17 00:00:00 2001
From: Krzysztof Wilczyński <kw@linux.com>
Date: Fri, 16 Apr 2021 20:58:39 +0000
Subject: PCI/sysfs: Convert "reset" to static attribute
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The "reset" sysfs attribute allows for resetting a PCI function.
Previously it was dynamically created either by pci_bus_add_device() or
the pci_sysfs_init() initcall, but since it doesn't need to be created or
removed dynamically, we can use a static attribute so the device model
takes care of addition and removal automatically.

Convert "reset" to a static attribute and use the .is_visible() callback to
check whether the device supports reset.

Clear reset_fn in pci_stop_dev() instead of pci_remove_capabilities_sysfs()
since we no longer explicitly remove the "reset" sysfs file.

[bhelgaas: commit log]
Suggested-by: Oliver O'Halloran <oohall@gmail.com>
Link: https://lore.kernel.org/r/20210416205856.3234481-4-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci-sysfs.c | 51 +++++++++++++++++++++++--------------------------
 drivers/pci/remove.c    |  2 ++
 2 files changed, 26 insertions(+), 27 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index fa8373685140..c469d9cad0a8 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -1355,25 +1355,33 @@ static ssize_t reset_store(struct device *dev, struct device_attribute *attr,
 
 	return count;
 }
+static DEVICE_ATTR_WO(reset);
 
-static DEVICE_ATTR(reset, 0200, NULL, reset_store);
+static struct attribute *pci_dev_reset_attrs[] = {
+	&dev_attr_reset.attr,
+	NULL,
+};
 
-static int pci_create_capabilities_sysfs(struct pci_dev *dev)
+static umode_t pci_dev_reset_attr_is_visible(struct kobject *kobj,
+					     struct attribute *a, int n)
 {
-	int retval;
+	struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
 
-	pcie_vpd_create_sysfs_dev_files(dev);
+	if (!pdev->reset_fn)
+		return 0;
 
-	if (dev->reset_fn) {
-		retval = device_create_file(&dev->dev, &dev_attr_reset);
-		if (retval)
-			goto error;
-	}
-	return 0;
+	return a->mode;
+}
 
-error:
-	pcie_vpd_remove_sysfs_dev_files(dev);
-	return retval;
+static const struct attribute_group pci_dev_reset_attr_group = {
+	.attrs = pci_dev_reset_attrs,
+	.is_visible = pci_dev_reset_attr_is_visible,
+};
+
+
+static void pci_create_capabilities_sysfs(struct pci_dev *dev)
+{
+	pcie_vpd_create_sysfs_dev_files(dev);
 }
 
 int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev)
@@ -1385,30 +1393,18 @@ int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev)
 
 	retval = pci_create_resource_files(pdev);
 	if (retval)
-		goto err;
+		return retval;
 
 	/* add sysfs entries for various capabilities */
-	retval = pci_create_capabilities_sysfs(pdev);
-	if (retval)
-		goto err_resource_files;
-
+	pci_create_capabilities_sysfs(pdev);
 	pci_create_firmware_label_files(pdev);
 
 	return 0;
-
-err_resource_files:
-	pci_remove_resource_files(pdev);
-err:
-	return retval;
 }
 
 static void pci_remove_capabilities_sysfs(struct pci_dev *dev)
 {
 	pcie_vpd_remove_sysfs_dev_files(dev);
-	if (dev->reset_fn) {
-		device_remove_file(&dev->dev, &dev_attr_reset);
-		dev->reset_fn = 0;
-	}
 }
 
 /**
@@ -1517,6 +1513,7 @@ const struct attribute_group *pci_dev_groups[] = {
 	&pci_dev_group,
 	&pci_dev_config_attr_group,
 	&pci_dev_rom_attr_group,
+	&pci_dev_reset_attr_group,
 	NULL,
 };
 
diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index 95dec03d9f2a..dd12c2fcc7dc 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -19,6 +19,8 @@ static void pci_stop_dev(struct pci_dev *dev)
 	pci_pme_active(dev, false);
 
 	if (pci_dev_is_added(dev)) {
+		dev->reset_fn = 0;
+
 		device_release_driver(&dev->dev);
 		pci_proc_detach_device(dev);
 		pci_remove_sysfs_dev_files(dev);
-- 
cgit v1.2.3


From e483bb9a991bdae29a0caa4b3a6d002c968f94aa Mon Sep 17 00:00:00 2001
From: Mark Langsdorf <mlangsdo@redhat.com>
Date: Fri, 23 Apr 2021 10:28:17 -0500
Subject: ACPI: custom_method: fix potential use-after-free issue

In cm_write(), buf is always freed when reaching the end of the
function.  If the requested count is less than table.length, the
allocated buffer will be freed but subsequent calls to cm_write() will
still try to access it.

Remove the unconditional kfree(buf) at the end of the function and
set the buf to NULL in the -EINVAL error path to match the rest of
function.

Fixes: 03d1571d9513 ("ACPI: custom_method: fix memory leaks")
Signed-off-by: Mark Langsdorf <mlangsdo@redhat.com>
Cc: 5.4+ <stable@vger.kernel.org> # 5.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/custom_method.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/acpi/custom_method.c b/drivers/acpi/custom_method.c
index 443fdf62dd22..8844f895f9be 100644
--- a/drivers/acpi/custom_method.c
+++ b/drivers/acpi/custom_method.c
@@ -55,6 +55,7 @@ static ssize_t cm_write(struct file *file, const char __user *user_buf,
 	    (*ppos + count < count) ||
 	    (count > uncopied_bytes)) {
 		kfree(buf);
+		buf = NULL;
 		return -EINVAL;
 	}
 
@@ -76,7 +77,6 @@ static ssize_t cm_write(struct file *file, const char __user *user_buf,
 		add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
 	}
 
-	kfree(buf);
 	return count;
 }
 
-- 
cgit v1.2.3


From 1cfd8956437f842836e8a066b40d1ec2fc01f13e Mon Sep 17 00:00:00 2001
From: Mark Langsdorf <mlangsdo@redhat.com>
Date: Tue, 27 Apr 2021 13:54:33 -0500
Subject: ACPI: custom_method: fix a possible memory leak

In cm_write(), if the 'buf' is allocated memory but not fully consumed,
it is possible to reallocate the buffer without freeing it by passing
'*ppos' as 0 on a subsequent call.

Add an explicit kfree() before kzalloc() to prevent the possible memory
leak.

Fixes: 526b4af47f44 ("ACPI: Split out custom_method functionality into an own driver")
Signed-off-by: Mark Langsdorf <mlangsdo@redhat.com>
Cc: 5.4+ <stable@vger.kernel.org> # 5.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/custom_method.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'drivers')

diff --git a/drivers/acpi/custom_method.c b/drivers/acpi/custom_method.c
index 8844f895f9be..d39a9b474727 100644
--- a/drivers/acpi/custom_method.c
+++ b/drivers/acpi/custom_method.c
@@ -42,6 +42,8 @@ static ssize_t cm_write(struct file *file, const char __user *user_buf,
 				   sizeof(struct acpi_table_header)))
 			return -EFAULT;
 		uncopied_bytes = max_size = table.length;
+		/* make sure the buf is not allocated */
+		kfree(buf);
 		buf = kzalloc(max_size, GFP_KERNEL);
 		if (!buf)
 			return -ENOMEM;
-- 
cgit v1.2.3


From 9b924f4f0d8f9557f4ef8a8d1468d507a662cef1 Mon Sep 17 00:00:00 2001
From: Yang Li <yang.lee@linux.alibaba.com>
Date: Thu, 29 Apr 2021 09:26:29 +0800
Subject: psci: Remove unneeded semicolon

Eliminate the following coccicheck warning:
./drivers/firmware/psci/psci.c:141:2-3: Unneeded semicolon

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Link: https://lore.kernel.org/r/1619659589-4775-1-git-send-email-yang.lee@linux.alibaba.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 drivers/firmware/psci/psci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
index f5fc429cae3f..35b355e68e6d 100644
--- a/drivers/firmware/psci/psci.c
+++ b/drivers/firmware/psci/psci.c
@@ -138,7 +138,7 @@ static int psci_to_linux_errno(int errno)
 		return -EINVAL;
 	case PSCI_RET_DENIED:
 		return -EPERM;
-	};
+	}
 
 	return -EINVAL;
 }
-- 
cgit v1.2.3


From 07b4523e9e2fe9763e5c62da032d3c444e83d0fd Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <bhelgaas@google.com>
Date: Wed, 28 Apr 2021 13:32:53 -0500
Subject: PCI/sysfs: Rename "vpd" attribute accessors

Rename "vpd" attribute accessors so they fit with the BIN_ATTR_RW() macro
usage.  Currently there is no BIN_ATTR_ADMIN_RW() that uses 0600
permissions, but if there were, it would likely use "vpd_read()" and
"vpd_write()".  No functional change intended.

Extracted from the patch mentioned below by Heiner Kallweit
<hkallweit1@gmail.com>.

Link: https://lore.kernel.org/linux-pci/7703024f-8882-9eec-a122-599871728a89@gmail.com/
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/vpd.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index 7915d10f9aa1..874bc155ffb5 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -397,9 +397,9 @@ void pci_vpd_release(struct pci_dev *dev)
 	kfree(dev->vpd);
 }
 
-static ssize_t read_vpd_attr(struct file *filp, struct kobject *kobj,
-			     struct bin_attribute *bin_attr, char *buf,
-			     loff_t off, size_t count)
+static ssize_t vpd_read(struct file *filp, struct kobject *kobj,
+			struct bin_attribute *bin_attr, char *buf, loff_t off,
+			size_t count)
 {
 	struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));
 
@@ -413,9 +413,9 @@ static ssize_t read_vpd_attr(struct file *filp, struct kobject *kobj,
 	return pci_read_vpd(dev, off, count, buf);
 }
 
-static ssize_t write_vpd_attr(struct file *filp, struct kobject *kobj,
-			      struct bin_attribute *bin_attr, char *buf,
-			      loff_t off, size_t count)
+static ssize_t vpd_write(struct file *filp, struct kobject *kobj,
+			 struct bin_attribute *bin_attr, char *buf, loff_t off,
+			 size_t count)
 {
 	struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));
 
@@ -445,8 +445,8 @@ void pcie_vpd_create_sysfs_dev_files(struct pci_dev *dev)
 	attr->size = 0;
 	attr->attr.name = "vpd";
 	attr->attr.mode = S_IRUSR | S_IWUSR;
-	attr->read = read_vpd_attr;
-	attr->write = write_vpd_attr;
+	attr->read = vpd_read;
+	attr->write = vpd_write;
 	retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
 	if (retval) {
 		kfree(attr);
-- 
cgit v1.2.3


From d93f8399053dcf117ff56a3029ff08c0e36f4b75 Mon Sep 17 00:00:00 2001
From: Krzysztof Wilczyński <kw@linux.com>
Date: Fri, 16 Apr 2021 20:58:40 +0000
Subject: PCI/sysfs: Convert "vpd" to static attribute
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The "vpd" sysfs attribute allows access to Vital Product Data (VPD).
Previously it was dynamically created either by pci_bus_add_device() or the
pci_sysfs_init() initcall, but since it doesn't need to be created or
removed dynamically, we can use a static attribute so the device model
takes care of addition and removal automatically.

Convert "vpd" to a static attribute and use the .is_bin_visible() callback
to check whether the device supports VPD.

Remove pcie_vpd_create_sysfs_dev_files(),
pcie_vpd_remove_sysfs_dev_files(), pci_create_capabilities_sysfs(), and
pci_create_capabilities_sysfs(), which are no longer needed.

[bhelgaas: This is substantially the same as the earlier patch from Heiner
Kallweit <hkallweit1@gmail.com>.  I included Krzysztof's change here so all
the "convert to static attribute" changes are together.]

[bhelgaas: rename to vpd_read()/vpd_write() and pci_dev_vpd_attr_group]
Suggested-by: Oliver O'Halloran <oohall@gmail.com>
Based-on: https://lore.kernel.org/r/7703024f-8882-9eec-a122-599871728a89@gmail.com
Based-on-patch-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/20210416205856.3234481-5-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci-sysfs.c | 15 +--------------
 drivers/pci/pci.h       |  3 +--
 drivers/pci/vpd.c       | 46 ++++++++++++++++------------------------------
 3 files changed, 18 insertions(+), 46 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index c469d9cad0a8..6dc01fe21fd2 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -1378,12 +1378,6 @@ static const struct attribute_group pci_dev_reset_attr_group = {
 	.is_visible = pci_dev_reset_attr_is_visible,
 };
 
-
-static void pci_create_capabilities_sysfs(struct pci_dev *dev)
-{
-	pcie_vpd_create_sysfs_dev_files(dev);
-}
-
 int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev)
 {
 	int retval;
@@ -1395,18 +1389,11 @@ int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev)
 	if (retval)
 		return retval;
 
-	/* add sysfs entries for various capabilities */
-	pci_create_capabilities_sysfs(pdev);
 	pci_create_firmware_label_files(pdev);
 
 	return 0;
 }
 
-static void pci_remove_capabilities_sysfs(struct pci_dev *dev)
-{
-	pcie_vpd_remove_sysfs_dev_files(dev);
-}
-
 /**
  * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
  * @pdev: device whose entries we should free
@@ -1418,7 +1405,6 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
 	if (!sysfs_initialized)
 		return;
 
-	pci_remove_capabilities_sysfs(pdev);
 	pci_remove_resource_files(pdev);
 	pci_remove_firmware_label_files(pdev);
 }
@@ -1514,6 +1500,7 @@ const struct attribute_group *pci_dev_groups[] = {
 	&pci_dev_config_attr_group,
 	&pci_dev_rom_attr_group,
 	&pci_dev_reset_attr_group,
+	&pci_dev_vpd_attr_group,
 	NULL,
 };
 
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index ef7c4661314f..14dcffc8a0ec 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -143,8 +143,7 @@ static inline bool pcie_downstream_port(const struct pci_dev *dev)
 
 int pci_vpd_init(struct pci_dev *dev);
 void pci_vpd_release(struct pci_dev *dev);
-void pcie_vpd_create_sysfs_dev_files(struct pci_dev *dev);
-void pcie_vpd_remove_sysfs_dev_files(struct pci_dev *dev);
+extern const struct attribute_group pci_dev_vpd_attr_group;
 
 /* PCI Virtual Channel */
 int pci_save_vc_state(struct pci_dev *dev);
diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index 874bc155ffb5..6168cf208d63 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -21,7 +21,6 @@ struct pci_vpd_ops {
 
 struct pci_vpd {
 	const struct pci_vpd_ops *ops;
-	struct bin_attribute *attr;	/* Descriptor for sysfs VPD entry */
 	struct mutex	lock;
 	unsigned int	len;
 	u16		flag;
@@ -428,41 +427,28 @@ static ssize_t vpd_write(struct file *filp, struct kobject *kobj,
 
 	return pci_write_vpd(dev, off, count, buf);
 }
+static BIN_ATTR(vpd, 0600, vpd_read, vpd_write, 0);
 
-void pcie_vpd_create_sysfs_dev_files(struct pci_dev *dev)
-{
-	int retval;
-	struct bin_attribute *attr;
-
-	if (!dev->vpd)
-		return;
+static struct bin_attribute *vpd_attrs[] = {
+	&bin_attr_vpd,
+	NULL,
+};
 
-	attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
-	if (!attr)
-		return;
+static umode_t vpd_attr_is_visible(struct kobject *kobj,
+				   struct bin_attribute *a, int n)
+{
+	struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));
 
-	sysfs_bin_attr_init(attr);
-	attr->size = 0;
-	attr->attr.name = "vpd";
-	attr->attr.mode = S_IRUSR | S_IWUSR;
-	attr->read = vpd_read;
-	attr->write = vpd_write;
-	retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
-	if (retval) {
-		kfree(attr);
-		return;
-	}
+	if (!pdev->vpd)
+		return 0;
 
-	dev->vpd->attr = attr;
+	return a->attr.mode;
 }
 
-void pcie_vpd_remove_sysfs_dev_files(struct pci_dev *dev)
-{
-	if (dev->vpd && dev->vpd->attr) {
-		sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
-		kfree(dev->vpd->attr);
-	}
-}
+const struct attribute_group pci_dev_vpd_attr_group = {
+	.bin_attrs = vpd_attrs,
+	.is_bin_visible = vpd_attr_is_visible,
+};
 
 int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt)
 {
-- 
cgit v1.2.3


From 1017275d2e43dba68527e0e69f4cc12d2b0f8966 Mon Sep 17 00:00:00 2001
From: Krzysztof Wilczyński <kw@linux.com>
Date: Tue, 27 Apr 2021 10:39:16 -0500
Subject: PCI/sysfs: Rename device_has_dsm() to device_has_acpi_name()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Rename device_has_dsm() to device_has_acpi_name() to better reflect its
purpose and move it earlier so it's available for a future SMBIOS
.is_visible() function.  No functional change intended.

[bhelgaas: split to separate patch]
Link: https://lore.kernel.org/r/20210416205856.3234481-6-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci-label.c | 39 +++++++++++++++++++--------------------
 1 file changed, 19 insertions(+), 20 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
index 781e45cf60d1..5fd5824db82f 100644
--- a/drivers/pci/pci-label.c
+++ b/drivers/pci/pci-label.c
@@ -33,6 +33,22 @@
 #include <linux/pci-acpi.h>
 #include "pci.h"
 
+static bool device_has_acpi_name(struct device *dev)
+{
+#ifdef CONFIG_ACPI
+	acpi_handle handle;
+
+	handle = ACPI_HANDLE(dev);
+	if (!handle)
+		return false;
+
+	return acpi_check_dsm(handle, &pci_acpi_dsm_guid, 0x2,
+			      1 << DSM_PCI_DEVICE_NAME);
+#else
+	return false;
+#endif
+}
+
 #ifdef CONFIG_DMI
 enum smbios_attr_enum {
 	SMBIOS_ATTR_NONE = 0,
@@ -209,18 +225,6 @@ static int dsm_get_label(struct device *dev, char *buf,
 	return len;
 }
 
-static bool device_has_dsm(struct device *dev)
-{
-	acpi_handle handle;
-
-	handle = ACPI_HANDLE(dev);
-	if (!handle)
-		return false;
-
-	return !!acpi_check_dsm(handle, &pci_acpi_dsm_guid, 0x2,
-				1 << DSM_PCI_DEVICE_NAME);
-}
-
 static umode_t acpi_index_string_exist(struct kobject *kobj,
 				       struct attribute *attr, int n)
 {
@@ -228,7 +232,7 @@ static umode_t acpi_index_string_exist(struct kobject *kobj,
 
 	dev = kobj_to_dev(kobj);
 
-	if (device_has_dsm(dev))
+	if (device_has_acpi_name(dev))
 		return S_IRUGO;
 
 	return 0;
@@ -287,16 +291,11 @@ static inline int pci_remove_acpi_index_label_files(struct pci_dev *pdev)
 {
 	return -1;
 }
-
-static inline bool device_has_dsm(struct device *dev)
-{
-	return false;
-}
 #endif
 
 void pci_create_firmware_label_files(struct pci_dev *pdev)
 {
-	if (device_has_dsm(&pdev->dev))
+	if (device_has_acpi_name(&pdev->dev))
 		pci_create_acpi_index_label_files(pdev);
 	else
 		pci_create_smbiosname_file(pdev);
@@ -304,7 +303,7 @@ void pci_create_firmware_label_files(struct pci_dev *pdev)
 
 void pci_remove_firmware_label_files(struct pci_dev *pdev)
 {
-	if (device_has_dsm(&pdev->dev))
+	if (device_has_acpi_name(&pdev->dev))
 		pci_remove_acpi_index_label_files(pdev);
 	else
 		pci_remove_smbiosname_file(pdev);
-- 
cgit v1.2.3


From 2ed6494155444dd4d2005869edce1ae73b4f23ca Mon Sep 17 00:00:00 2001
From: Krzysztof Wilczyński <kw@linux.com>
Date: Tue, 27 Apr 2021 13:48:51 -0500
Subject: PCI/sysfs: Define ACPI label attributes with DEVICE_ATTR*()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Use DEVICE_ATTR*() to simplify definitions of the ACPI label attributes.
No functional change intended.

[bhelgaas: split to separate patch]
Link: https://lore.kernel.org/r/20210416205856.3234481-6-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci-label.c | 38 +++++++++++++++-----------------------
 1 file changed, 15 insertions(+), 23 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
index 5fd5824db82f..4fef6fc0740f 100644
--- a/drivers/pci/pci-label.c
+++ b/drivers/pci/pci-label.c
@@ -225,50 +225,42 @@ static int dsm_get_label(struct device *dev, char *buf,
 	return len;
 }
 
-static umode_t acpi_index_string_exist(struct kobject *kobj,
-				       struct attribute *attr, int n)
+static umode_t acpi_attr_is_visible(struct kobject *kobj, struct attribute *a,
+				    int n)
 {
 	struct device *dev;
 
 	dev = kobj_to_dev(kobj);
 
-	if (device_has_acpi_name(dev))
-		return S_IRUGO;
+	if (!device_has_acpi_name(dev))
+		return 0;
 
-	return 0;
+	return a->mode;
 }
 
-static ssize_t acpilabel_show(struct device *dev,
-			      struct device_attribute *attr, char *buf)
+static ssize_t label_show(struct device *dev, struct device_attribute *attr,
+			  char *buf)
 {
 	return dsm_get_label(dev, buf, ACPI_ATTR_LABEL_SHOW);
 }
+static DEVICE_ATTR_RO(label);
 
-static ssize_t acpiindex_show(struct device *dev,
+static ssize_t acpi_index_show(struct device *dev,
 			      struct device_attribute *attr, char *buf)
 {
 	return dsm_get_label(dev, buf, ACPI_ATTR_INDEX_SHOW);
 }
+static DEVICE_ATTR_RO(acpi_index);
 
-static struct device_attribute acpi_attr_label = {
-	.attr = {.name = "label", .mode = 0444},
-	.show = acpilabel_show,
-};
-
-static struct device_attribute acpi_attr_index = {
-	.attr = {.name = "acpi_index", .mode = 0444},
-	.show = acpiindex_show,
-};
-
-static struct attribute *acpi_attributes[] = {
-	&acpi_attr_label.attr,
-	&acpi_attr_index.attr,
+static struct attribute *acpi_attrs[] = {
+	&dev_attr_label.attr,
+	&dev_attr_acpi_index.attr,
 	NULL,
 };
 
 static const struct attribute_group acpi_attr_group = {
-	.attrs = acpi_attributes,
-	.is_visible = acpi_index_string_exist,
+	.attrs = acpi_attrs,
+	.is_visible = acpi_attr_is_visible,
 };
 
 static int pci_create_acpi_index_label_files(struct pci_dev *pdev)
-- 
cgit v1.2.3


From 4dd7dfa166d220a245ee21f499bb1084bc249393 Mon Sep 17 00:00:00 2001
From: Krzysztof Wilczyński <kw@linux.com>
Date: Tue, 27 Apr 2021 14:18:26 -0500
Subject: PCI/sysfs: Define SMBIOS label attributes with DEVICE_ATTR*()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Use DEVICE_ATTR*() to simplify definition of the SMBIOS label attributes.
No functional change intended.

Note that dev_attr_smbios_label requires __ATTR() because the "label"
attribute can be exposed via either ACPI or SMBIOS, and we already have the
ACPI label_show() function in this file.

[bhelgaas: split to separate patch]
Link: https://lore.kernel.org/r/20210416205856.3234481-6-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci-label.c | 41 ++++++++++++++++++-----------------------
 1 file changed, 18 insertions(+), 23 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
index 4fef6fc0740f..6c0c4e700bc7 100644
--- a/drivers/pci/pci-label.c
+++ b/drivers/pci/pci-label.c
@@ -92,8 +92,8 @@ static size_t find_smbios_instance_string(struct pci_dev *pdev, char *buf,
 	return 0;
 }
 
-static umode_t smbios_instance_string_exist(struct kobject *kobj,
-					    struct attribute *attr, int n)
+static umode_t smbios_attr_is_visible(struct kobject *kobj, struct attribute *a,
+				      int n)
 {
 	struct device *dev;
 	struct pci_dev *pdev;
@@ -101,12 +101,14 @@ static umode_t smbios_instance_string_exist(struct kobject *kobj,
 	dev = kobj_to_dev(kobj);
 	pdev = to_pci_dev(dev);
 
-	return find_smbios_instance_string(pdev, NULL, SMBIOS_ATTR_NONE) ?
-					   S_IRUGO : 0;
+	if (!find_smbios_instance_string(pdev, NULL, SMBIOS_ATTR_NONE))
+		return 0;
+
+	return a->mode;
 }
 
-static ssize_t smbioslabel_show(struct device *dev,
-				struct device_attribute *attr, char *buf)
+static ssize_t smbios_label_show(struct device *dev,
+				 struct device_attribute *attr, char *buf)
 {
 	struct pci_dev *pdev;
 	pdev = to_pci_dev(dev);
@@ -114,9 +116,11 @@ static ssize_t smbioslabel_show(struct device *dev,
 	return find_smbios_instance_string(pdev, buf,
 					   SMBIOS_ATTR_LABEL_SHOW);
 }
+static struct device_attribute dev_attr_smbios_label = __ATTR(label, 0444,
+						    smbios_label_show, NULL);
 
-static ssize_t smbiosinstance_show(struct device *dev,
-				   struct device_attribute *attr, char *buf)
+static ssize_t index_show(struct device *dev, struct device_attribute *attr,
+			  char *buf)
 {
 	struct pci_dev *pdev;
 	pdev = to_pci_dev(dev);
@@ -124,26 +128,17 @@ static ssize_t smbiosinstance_show(struct device *dev,
 	return find_smbios_instance_string(pdev, buf,
 					   SMBIOS_ATTR_INSTANCE_SHOW);
 }
+static DEVICE_ATTR_RO(index);
 
-static struct device_attribute smbios_attr_label = {
-	.attr = {.name = "label", .mode = 0444},
-	.show = smbioslabel_show,
-};
-
-static struct device_attribute smbios_attr_instance = {
-	.attr = {.name = "index", .mode = 0444},
-	.show = smbiosinstance_show,
-};
-
-static struct attribute *smbios_attributes[] = {
-	&smbios_attr_label.attr,
-	&smbios_attr_instance.attr,
+static struct attribute *smbios_attrs[] = {
+	&dev_attr_smbios_label.attr,
+	&dev_attr_index.attr,
 	NULL,
 };
 
 static const struct attribute_group smbios_attr_group = {
-	.attrs = smbios_attributes,
-	.is_visible = smbios_instance_string_exist,
+	.attrs = smbios_attrs,
+	.is_visible = smbios_attr_is_visible,
 };
 
 static int pci_create_smbiosname_file(struct pci_dev *pdev)
-- 
cgit v1.2.3


From 506140f9c06b0d136669ae7795e0264c9f21c1a7 Mon Sep 17 00:00:00 2001
From: Krzysztof Wilczyński <kw@linux.com>
Date: Tue, 27 Apr 2021 10:49:16 -0500
Subject: PCI/sysfs: Convert "index", "acpi_index", "label" to static
 attributes
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The "label", "index", and "acpi_index" sysfs attributes show firmware label
information about the device.  If the ACPI Device Name _DSM is implemented
for the device, we have:

  label        Device name (optional, may be null)
  acpi_index   Instance number (unique under \_SB scope)

When there is no ACPI _DSM and SMBIOS provides an Onboard Devices structure
for the device, we have:

  label        Reference Designation, e.g., a silkscreen label
  index        Device Type Instance

Previously these attributes were dynamically created either by
pci_bus_add_device() or the pci_sysfs_init() initcall, but since they don't
need to be created or removed dynamically, we can use a static attribute so
the device model takes care of addition and removal automatically.

Convert "label", "index", and "acpi_index" to static attributes.

Presence of the ACPI _DSM (device_has_acpi_name()) determines whether the
ACPI information (label, acpi_index) or the SMBIOS information (label,
index) is visible.

[bhelgaas: commit log, split to separate patch, add "pci_dev_" prefix]
Suggested-by: Oliver O'Halloran <oohall@gmail.com>
Link: https://lore.kernel.org/r/20210416205856.3234481-6-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci-label.c | 63 ++++---------------------------------------------
 drivers/pci/pci-sysfs.c | 17 ++++++-------
 drivers/pci/pci.h       | 13 ++++------
 3 files changed, 16 insertions(+), 77 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
index 6c0c4e700bc7..cdcbe09d363e 100644
--- a/drivers/pci/pci-label.c
+++ b/drivers/pci/pci-label.c
@@ -101,6 +101,9 @@ static umode_t smbios_attr_is_visible(struct kobject *kobj, struct attribute *a,
 	dev = kobj_to_dev(kobj);
 	pdev = to_pci_dev(dev);
 
+	if (device_has_acpi_name(dev))
+		return 0;
+
 	if (!find_smbios_instance_string(pdev, NULL, SMBIOS_ATTR_NONE))
 		return 0;
 
@@ -136,29 +139,10 @@ static struct attribute *smbios_attrs[] = {
 	NULL,
 };
 
-static const struct attribute_group smbios_attr_group = {
+const struct attribute_group pci_dev_smbios_attr_group = {
 	.attrs = smbios_attrs,
 	.is_visible = smbios_attr_is_visible,
 };
-
-static int pci_create_smbiosname_file(struct pci_dev *pdev)
-{
-	return sysfs_create_group(&pdev->dev.kobj, &smbios_attr_group);
-}
-
-static void pci_remove_smbiosname_file(struct pci_dev *pdev)
-{
-	sysfs_remove_group(&pdev->dev.kobj, &smbios_attr_group);
-}
-#else
-static inline int pci_create_smbiosname_file(struct pci_dev *pdev)
-{
-	return -1;
-}
-
-static inline void pci_remove_smbiosname_file(struct pci_dev *pdev)
-{
-}
 #endif
 
 #ifdef CONFIG_ACPI
@@ -253,45 +237,8 @@ static struct attribute *acpi_attrs[] = {
 	NULL,
 };
 
-static const struct attribute_group acpi_attr_group = {
+const struct attribute_group pci_dev_acpi_attr_group = {
 	.attrs = acpi_attrs,
 	.is_visible = acpi_attr_is_visible,
 };
-
-static int pci_create_acpi_index_label_files(struct pci_dev *pdev)
-{
-	return sysfs_create_group(&pdev->dev.kobj, &acpi_attr_group);
-}
-
-static int pci_remove_acpi_index_label_files(struct pci_dev *pdev)
-{
-	sysfs_remove_group(&pdev->dev.kobj, &acpi_attr_group);
-	return 0;
-}
-#else
-static inline int pci_create_acpi_index_label_files(struct pci_dev *pdev)
-{
-	return -1;
-}
-
-static inline int pci_remove_acpi_index_label_files(struct pci_dev *pdev)
-{
-	return -1;
-}
 #endif
-
-void pci_create_firmware_label_files(struct pci_dev *pdev)
-{
-	if (device_has_acpi_name(&pdev->dev))
-		pci_create_acpi_index_label_files(pdev);
-	else
-		pci_create_smbiosname_file(pdev);
-}
-
-void pci_remove_firmware_label_files(struct pci_dev *pdev)
-{
-	if (device_has_acpi_name(&pdev->dev))
-		pci_remove_acpi_index_label_files(pdev);
-	else
-		pci_remove_smbiosname_file(pdev);
-}
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 6dc01fe21fd2..befcd04ae0c8 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -1380,18 +1380,10 @@ static const struct attribute_group pci_dev_reset_attr_group = {
 
 int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev)
 {
-	int retval;
-
 	if (!sysfs_initialized)
 		return -EACCES;
 
-	retval = pci_create_resource_files(pdev);
-	if (retval)
-		return retval;
-
-	pci_create_firmware_label_files(pdev);
-
-	return 0;
+	return pci_create_resource_files(pdev);
 }
 
 /**
@@ -1406,7 +1398,6 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
 		return;
 
 	pci_remove_resource_files(pdev);
-	pci_remove_firmware_label_files(pdev);
 }
 
 static int __init pci_sysfs_init(void)
@@ -1501,6 +1492,12 @@ const struct attribute_group *pci_dev_groups[] = {
 	&pci_dev_rom_attr_group,
 	&pci_dev_reset_attr_group,
 	&pci_dev_vpd_attr_group,
+#ifdef CONFIG_DMI
+	&pci_dev_smbios_attr_group,
+#endif
+#ifdef CONFIG_ACPI
+	&pci_dev_acpi_attr_group,
+#endif
 	NULL,
 };
 
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 14dcffc8a0ec..34449e9a6f0a 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -21,16 +21,10 @@ bool pcie_cap_has_rtctl(const struct pci_dev *dev);
 
 int pci_create_sysfs_dev_files(struct pci_dev *pdev);
 void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
-#if !defined(CONFIG_DMI) && !defined(CONFIG_ACPI)
-static inline void pci_create_firmware_label_files(struct pci_dev *pdev)
-{ return; }
-static inline void pci_remove_firmware_label_files(struct pci_dev *pdev)
-{ return; }
-#else
-void pci_create_firmware_label_files(struct pci_dev *pdev);
-void pci_remove_firmware_label_files(struct pci_dev *pdev);
-#endif
 void pci_cleanup_rom(struct pci_dev *dev);
+#ifdef CONFIG_DMI
+extern const struct attribute_group pci_dev_smbios_attr_group;
+#endif
 
 enum pci_mmap_api {
 	PCI_MMAP_SYSFS,	/* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */
@@ -695,6 +689,7 @@ static inline int pci_aer_raw_clear_status(struct pci_dev *dev) { return -EINVAL
 
 #ifdef CONFIG_ACPI
 int pci_acpi_program_hp_params(struct pci_dev *dev);
+extern const struct attribute_group pci_dev_acpi_attr_group;
 #else
 static inline int pci_acpi_program_hp_params(struct pci_dev *dev)
 {
-- 
cgit v1.2.3


From 362fb766264a1d62254ad950304fa1d97172bb44 Mon Sep 17 00:00:00 2001
From: Krzysztof Wilczyński <kw@linux.com>
Date: Tue, 27 Apr 2021 15:04:44 -0500
Subject: PCI/sysfs: Tidy SMBIOS & ACPI label attributes
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Update coding style to reduce distraction.  No functional change intended.

[bhelgaas: split to separate patch]
Link: https://lore.kernel.org/r/20210416205856.3234481-6-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci-label.c | 33 ++++++++++-----------------------
 1 file changed, 10 insertions(+), 23 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
index cdcbe09d363e..c4636f2e8545 100644
--- a/drivers/pci/pci-label.c
+++ b/drivers/pci/pci-label.c
@@ -36,9 +36,8 @@
 static bool device_has_acpi_name(struct device *dev)
 {
 #ifdef CONFIG_ACPI
-	acpi_handle handle;
+	acpi_handle handle = ACPI_HANDLE(dev);
 
-	handle = ACPI_HANDLE(dev);
 	if (!handle)
 		return false;
 
@@ -61,13 +60,9 @@ static size_t find_smbios_instance_string(struct pci_dev *pdev, char *buf,
 {
 	const struct dmi_device *dmi;
 	struct dmi_dev_onboard *donboard;
-	int domain_nr;
-	int bus;
-	int devfn;
-
-	domain_nr = pci_domain_nr(pdev->bus);
-	bus = pdev->bus->number;
-	devfn = pdev->devfn;
+	int domain_nr = pci_domain_nr(pdev->bus);
+	int bus = pdev->bus->number;
+	int devfn = pdev->devfn;
 
 	dmi = NULL;
 	while ((dmi = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD,
@@ -95,11 +90,8 @@ static size_t find_smbios_instance_string(struct pci_dev *pdev, char *buf,
 static umode_t smbios_attr_is_visible(struct kobject *kobj, struct attribute *a,
 				      int n)
 {
-	struct device *dev;
-	struct pci_dev *pdev;
-
-	dev = kobj_to_dev(kobj);
-	pdev = to_pci_dev(dev);
+	struct device *dev = kobj_to_dev(kobj);
+	struct pci_dev *pdev = to_pci_dev(dev);
 
 	if (device_has_acpi_name(dev))
 		return 0;
@@ -113,8 +105,7 @@ static umode_t smbios_attr_is_visible(struct kobject *kobj, struct attribute *a,
 static ssize_t smbios_label_show(struct device *dev,
 				 struct device_attribute *attr, char *buf)
 {
-	struct pci_dev *pdev;
-	pdev = to_pci_dev(dev);
+	struct pci_dev *pdev = to_pci_dev(dev);
 
 	return find_smbios_instance_string(pdev, buf,
 					   SMBIOS_ATTR_LABEL_SHOW);
@@ -125,8 +116,7 @@ static struct device_attribute dev_attr_smbios_label = __ATTR(label, 0444,
 static ssize_t index_show(struct device *dev, struct device_attribute *attr,
 			  char *buf)
 {
-	struct pci_dev *pdev;
-	pdev = to_pci_dev(dev);
+	struct pci_dev *pdev = to_pci_dev(dev);
 
 	return find_smbios_instance_string(pdev, buf,
 					   SMBIOS_ATTR_INSTANCE_SHOW);
@@ -164,11 +154,10 @@ static void dsm_label_utf16s_to_utf8s(union acpi_object *obj, char *buf)
 static int dsm_get_label(struct device *dev, char *buf,
 			 enum acpi_attr_enum attr)
 {
-	acpi_handle handle;
+	acpi_handle handle = ACPI_HANDLE(dev);
 	union acpi_object *obj, *tmp;
 	int len = -1;
 
-	handle = ACPI_HANDLE(dev);
 	if (!handle)
 		return -1;
 
@@ -207,9 +196,7 @@ static int dsm_get_label(struct device *dev, char *buf,
 static umode_t acpi_attr_is_visible(struct kobject *kobj, struct attribute *a,
 				    int n)
 {
-	struct device *dev;
-
-	dev = kobj_to_dev(kobj);
+	struct device *dev = kobj_to_dev(kobj);
 
 	if (!device_has_acpi_name(dev))
 		return 0;
-- 
cgit v1.2.3


From df1af7cbe7bc11720b3e915771d47acc3604eb44 Mon Sep 17 00:00:00 2001
From: Krzysztof Wilczyński <kw@linux.com>
Date: Tue, 27 Apr 2021 15:18:47 -0500
Subject: PCI/sysfs: Rearrange smbios_attr_group and acpi_attr_group
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Collect the smbios_attr_group and acpi_attr_group together in the logical
order.  No functional change intended.

[bhelgaas: split to separate patch]
Link: https://lore.kernel.org/r/20210416205856.3234481-6-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci-label.c | 52 ++++++++++++++++++++++++-------------------------
 1 file changed, 26 insertions(+), 26 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
index c4636f2e8545..f94ce0328609 100644
--- a/drivers/pci/pci-label.c
+++ b/drivers/pci/pci-label.c
@@ -87,21 +87,6 @@ static size_t find_smbios_instance_string(struct pci_dev *pdev, char *buf,
 	return 0;
 }
 
-static umode_t smbios_attr_is_visible(struct kobject *kobj, struct attribute *a,
-				      int n)
-{
-	struct device *dev = kobj_to_dev(kobj);
-	struct pci_dev *pdev = to_pci_dev(dev);
-
-	if (device_has_acpi_name(dev))
-		return 0;
-
-	if (!find_smbios_instance_string(pdev, NULL, SMBIOS_ATTR_NONE))
-		return 0;
-
-	return a->mode;
-}
-
 static ssize_t smbios_label_show(struct device *dev,
 				 struct device_attribute *attr, char *buf)
 {
@@ -129,6 +114,21 @@ static struct attribute *smbios_attrs[] = {
 	NULL,
 };
 
+static umode_t smbios_attr_is_visible(struct kobject *kobj, struct attribute *a,
+				      int n)
+{
+	struct device *dev = kobj_to_dev(kobj);
+	struct pci_dev *pdev = to_pci_dev(dev);
+
+	if (device_has_acpi_name(dev))
+		return 0;
+
+	if (!find_smbios_instance_string(pdev, NULL, SMBIOS_ATTR_NONE))
+		return 0;
+
+	return a->mode;
+}
+
 const struct attribute_group pci_dev_smbios_attr_group = {
 	.attrs = smbios_attrs,
 	.is_visible = smbios_attr_is_visible,
@@ -193,17 +193,6 @@ static int dsm_get_label(struct device *dev, char *buf,
 	return len;
 }
 
-static umode_t acpi_attr_is_visible(struct kobject *kobj, struct attribute *a,
-				    int n)
-{
-	struct device *dev = kobj_to_dev(kobj);
-
-	if (!device_has_acpi_name(dev))
-		return 0;
-
-	return a->mode;
-}
-
 static ssize_t label_show(struct device *dev, struct device_attribute *attr,
 			  char *buf)
 {
@@ -224,6 +213,17 @@ static struct attribute *acpi_attrs[] = {
 	NULL,
 };
 
+static umode_t acpi_attr_is_visible(struct kobject *kobj, struct attribute *a,
+				    int n)
+{
+	struct device *dev = kobj_to_dev(kobj);
+
+	if (!device_has_acpi_name(dev))
+		return 0;
+
+	return a->mode;
+}
+
 const struct attribute_group pci_dev_acpi_attr_group = {
 	.attrs = acpi_attrs,
 	.is_visible = acpi_attr_is_visible,
-- 
cgit v1.2.3


From ad025f8e46f3dbf09b1bf8d7a5b4ce858df74544 Mon Sep 17 00:00:00 2001
From: Krzysztof Wilczyński <kw@linux.com>
Date: Fri, 16 Apr 2021 20:58:45 +0000
Subject: PCI/sysfs: Use sysfs_emit() and sysfs_emit_at() in "show" functions
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The sysfs_emit() and sysfs_emit_at() functions were introduced to make it
less ambiguous which function is preferred when writing to the output
buffer in a device attribute's "show" callback [1].

Convert the PCI sysfs object "show" functions from sprintf(), snprintf()
and scnprintf() to sysfs_emit() and sysfs_emit_at() accordingly, as the
latter is aware of the PAGE_SIZE buffer and correctly returns the number of
bytes written into the buffer.

No functional change intended.

[1] Documentation/filesystems/sysfs.rst

[bhelgaas: drop dsm_label_utf16s_to_utf8s(), link speed/width changes]
Link: https://lore.kernel.org/r/20210416205856.3234481-10-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci-label.c | 10 +++----
 drivers/pci/pci-sysfs.c | 72 ++++++++++++++++++++++++-------------------------
 2 files changed, 40 insertions(+), 42 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
index f94ce0328609..c32f3b7540e8 100644
--- a/drivers/pci/pci-label.c
+++ b/drivers/pci/pci-label.c
@@ -73,13 +73,11 @@ static size_t find_smbios_instance_string(struct pci_dev *pdev, char *buf,
 				donboard->devfn == devfn) {
 			if (buf) {
 				if (attribute == SMBIOS_ATTR_INSTANCE_SHOW)
-					return scnprintf(buf, PAGE_SIZE,
-							 "%d\n",
-							 donboard->instance);
+					return sysfs_emit(buf, "%d\n",
+							  donboard->instance);
 				else if (attribute == SMBIOS_ATTR_LABEL_SHOW)
-					return scnprintf(buf, PAGE_SIZE,
-							 "%s\n",
-							 dmi->name);
+					return sysfs_emit(buf, "%s\n",
+							  dmi->name);
 			}
 			return strlen(dmi->name);
 		}
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index befcd04ae0c8..e216d715d26b 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -39,7 +39,7 @@ field##_show(struct device *dev, struct device_attribute *attr, char *buf)				\
 	struct pci_dev *pdev;						\
 									\
 	pdev = to_pci_dev(dev);						\
-	return sprintf(buf, format_string, pdev->field);		\
+	return sysfs_emit(buf, format_string, pdev->field);		\
 }									\
 static DEVICE_ATTR_RO(field)
 
@@ -56,7 +56,7 @@ static ssize_t broken_parity_status_show(struct device *dev,
 					 char *buf)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
-	return sprintf(buf, "%u\n", pdev->broken_parity_status);
+	return sysfs_emit(buf, "%u\n", pdev->broken_parity_status);
 }
 
 static ssize_t broken_parity_status_store(struct device *dev,
@@ -129,7 +129,7 @@ static ssize_t power_state_show(struct device *dev,
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
 
-	return sprintf(buf, "%s\n", pci_power_name(pdev->current_state));
+	return sysfs_emit(buf, "%s\n", pci_power_name(pdev->current_state));
 }
 static DEVICE_ATTR_RO(power_state);
 
@@ -138,10 +138,10 @@ static ssize_t resource_show(struct device *dev, struct device_attribute *attr,
 			     char *buf)
 {
 	struct pci_dev *pci_dev = to_pci_dev(dev);
-	char *str = buf;
 	int i;
 	int max;
 	resource_size_t start, end;
+	size_t len = 0;
 
 	if (pci_dev->subordinate)
 		max = DEVICE_COUNT_RESOURCE;
@@ -151,12 +151,12 @@ static ssize_t resource_show(struct device *dev, struct device_attribute *attr,
 	for (i = 0; i < max; i++) {
 		struct resource *res =  &pci_dev->resource[i];
 		pci_resource_to_user(pci_dev, i, res, &start, &end);
-		str += sprintf(str, "0x%016llx 0x%016llx 0x%016llx\n",
-			       (unsigned long long)start,
-			       (unsigned long long)end,
-			       (unsigned long long)res->flags);
+		len += sysfs_emit_at(buf, len, "0x%016llx 0x%016llx 0x%016llx\n",
+				     (unsigned long long)start,
+				     (unsigned long long)end,
+				     (unsigned long long)res->flags);
 	}
-	return (str - buf);
+	return len;
 }
 static DEVICE_ATTR_RO(resource);
 
@@ -165,8 +165,8 @@ static ssize_t max_link_speed_show(struct device *dev,
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
 
-	return sprintf(buf, "%s\n",
-		       pci_speed_string(pcie_get_speed_cap(pdev)));
+	return sysfs_emit(buf, "%s\n",
+			  pci_speed_string(pcie_get_speed_cap(pdev)));
 }
 static DEVICE_ATTR_RO(max_link_speed);
 
@@ -175,7 +175,7 @@ static ssize_t max_link_width_show(struct device *dev,
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
 
-	return sprintf(buf, "%u\n", pcie_get_width_cap(pdev));
+	return sysfs_emit(buf, "%u\n", pcie_get_width_cap(pdev));
 }
 static DEVICE_ATTR_RO(max_link_width);
 
@@ -193,7 +193,7 @@ static ssize_t current_link_speed_show(struct device *dev,
 
 	speed = pcie_link_speed[linkstat & PCI_EXP_LNKSTA_CLS];
 
-	return sprintf(buf, "%s\n", pci_speed_string(speed));
+	return sysfs_emit(buf, "%s\n", pci_speed_string(speed));
 }
 static DEVICE_ATTR_RO(current_link_speed);
 
@@ -208,7 +208,7 @@ static ssize_t current_link_width_show(struct device *dev,
 	if (err)
 		return -EINVAL;
 
-	return sprintf(buf, "%u\n",
+	return sysfs_emit(buf, "%u\n",
 		(linkstat & PCI_EXP_LNKSTA_NLW) >> PCI_EXP_LNKSTA_NLW_SHIFT);
 }
 static DEVICE_ATTR_RO(current_link_width);
@@ -225,7 +225,7 @@ static ssize_t secondary_bus_number_show(struct device *dev,
 	if (err)
 		return -EINVAL;
 
-	return sprintf(buf, "%u\n", sec_bus);
+	return sysfs_emit(buf, "%u\n", sec_bus);
 }
 static DEVICE_ATTR_RO(secondary_bus_number);
 
@@ -241,7 +241,7 @@ static ssize_t subordinate_bus_number_show(struct device *dev,
 	if (err)
 		return -EINVAL;
 
-	return sprintf(buf, "%u\n", sub_bus);
+	return sysfs_emit(buf, "%u\n", sub_bus);
 }
 static DEVICE_ATTR_RO(subordinate_bus_number);
 
@@ -251,7 +251,7 @@ static ssize_t ari_enabled_show(struct device *dev,
 {
 	struct pci_dev *pci_dev = to_pci_dev(dev);
 
-	return sprintf(buf, "%u\n", pci_ari_enabled(pci_dev->bus));
+	return sysfs_emit(buf, "%u\n", pci_ari_enabled(pci_dev->bus));
 }
 static DEVICE_ATTR_RO(ari_enabled);
 
@@ -260,11 +260,11 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
 {
 	struct pci_dev *pci_dev = to_pci_dev(dev);
 
-	return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X\n",
-		       pci_dev->vendor, pci_dev->device,
-		       pci_dev->subsystem_vendor, pci_dev->subsystem_device,
-		       (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),
-		       (u8)(pci_dev->class));
+	return sysfs_emit(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X\n",
+			  pci_dev->vendor, pci_dev->device,
+			  pci_dev->subsystem_vendor, pci_dev->subsystem_device,
+			  (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),
+			  (u8)(pci_dev->class));
 }
 static DEVICE_ATTR_RO(modalias);
 
@@ -302,7 +302,7 @@ static ssize_t enable_show(struct device *dev, struct device_attribute *attr,
 	struct pci_dev *pdev;
 
 	pdev = to_pci_dev(dev);
-	return sprintf(buf, "%u\n", atomic_read(&pdev->enable_cnt));
+	return sysfs_emit(buf, "%u\n", atomic_read(&pdev->enable_cnt));
 }
 static DEVICE_ATTR_RW(enable);
 
@@ -338,7 +338,7 @@ static ssize_t numa_node_store(struct device *dev,
 static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr,
 			      char *buf)
 {
-	return sprintf(buf, "%d\n", dev->numa_node);
+	return sysfs_emit(buf, "%d\n", dev->numa_node);
 }
 static DEVICE_ATTR_RW(numa_node);
 #endif
@@ -348,7 +348,7 @@ static ssize_t dma_mask_bits_show(struct device *dev,
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
 
-	return sprintf(buf, "%d\n", fls64(pdev->dma_mask));
+	return sysfs_emit(buf, "%d\n", fls64(pdev->dma_mask));
 }
 static DEVICE_ATTR_RO(dma_mask_bits);
 
@@ -356,7 +356,7 @@ static ssize_t consistent_dma_mask_bits_show(struct device *dev,
 					     struct device_attribute *attr,
 					     char *buf)
 {
-	return sprintf(buf, "%d\n", fls64(dev->coherent_dma_mask));
+	return sysfs_emit(buf, "%d\n", fls64(dev->coherent_dma_mask));
 }
 static DEVICE_ATTR_RO(consistent_dma_mask_bits);
 
@@ -366,9 +366,9 @@ static ssize_t msi_bus_show(struct device *dev, struct device_attribute *attr,
 	struct pci_dev *pdev = to_pci_dev(dev);
 	struct pci_bus *subordinate = pdev->subordinate;
 
-	return sprintf(buf, "%u\n", subordinate ?
-		       !(subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI)
-			   : !pdev->no_msi);
+	return sysfs_emit(buf, "%u\n", subordinate ?
+			  !(subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI)
+			    : !pdev->no_msi);
 }
 
 static ssize_t msi_bus_store(struct device *dev, struct device_attribute *attr,
@@ -523,7 +523,7 @@ static ssize_t d3cold_allowed_show(struct device *dev,
 				   struct device_attribute *attr, char *buf)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
-	return sprintf(buf, "%u\n", pdev->d3cold_allowed);
+	return sysfs_emit(buf, "%u\n", pdev->d3cold_allowed);
 }
 static DEVICE_ATTR_RW(d3cold_allowed);
 #endif
@@ -537,7 +537,7 @@ static ssize_t devspec_show(struct device *dev,
 
 	if (np == NULL)
 		return 0;
-	return sprintf(buf, "%pOF", np);
+	return sysfs_emit(buf, "%pOF", np);
 }
 static DEVICE_ATTR_RO(devspec);
 #endif
@@ -583,7 +583,7 @@ static ssize_t driver_override_show(struct device *dev,
 	ssize_t len;
 
 	device_lock(dev);
-	len = scnprintf(buf, PAGE_SIZE, "%s\n", pdev->driver_override);
+	len = sysfs_emit(buf, "%s\n", pdev->driver_override);
 	device_unlock(dev);
 	return len;
 }
@@ -658,11 +658,11 @@ static ssize_t boot_vga_show(struct device *dev, struct device_attribute *attr,
 	struct pci_dev *vga_dev = vga_default_device();
 
 	if (vga_dev)
-		return sprintf(buf, "%u\n", (pdev == vga_dev));
+		return sysfs_emit(buf, "%u\n", (pdev == vga_dev));
 
-	return sprintf(buf, "%u\n",
-		!!(pdev->resource[PCI_ROM_RESOURCE].flags &
-		   IORESOURCE_ROM_SHADOW));
+	return sysfs_emit(buf, "%u\n",
+			  !!(pdev->resource[PCI_ROM_RESOURCE].flags &
+			     IORESOURCE_ROM_SHADOW));
 }
 static DEVICE_ATTR_RO(boot_vga);
 
-- 
cgit v1.2.3


From 294353d950ab3e47d7694d382e50c887206f541a Mon Sep 17 00:00:00 2001
From: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Date: Thu, 25 Mar 2021 15:26:04 +0800
Subject: PCI: dwc: Move dw_pcie_msi_init() to dw_pcie_setup_rc()

If the host which makes use of IP's integrated MSI Receiver losts
power during suspend, we need to reinit the RC and MSI Receiver in
resume. But after we move dw_pcie_msi_init() into the core, we have no
API to do so. Usually the dwc users need to call dw_pcie_setup_rc() to
reinit the RC, we can solve this problem by moving dw_pcie_msi_init()
to dw_pcie_setup_rc().

Link: https://lore.kernel.org/r/20210325152604.6e79deba@xhacker.debian
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 drivers/pci/controller/dwc/pcie-designware-host.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 7e55b2b66182..e6c274f4485c 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -400,7 +400,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
 	}
 
 	dw_pcie_setup_rc(pp);
-	dw_pcie_msi_init(pp);
 
 	if (!dw_pcie_link_up(pci) && pci->ops && pci->ops->start_link) {
 		ret = pci->ops->start_link(pci);
@@ -551,6 +550,8 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
 		}
 	}
 
+	dw_pcie_msi_init(pp);
+
 	/* Setup RC BARs */
 	dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0x00000004);
 	dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_1, 0x00000000);
-- 
cgit v1.2.3


From 7d499169f793083c83bcc6e31170be8f36087075 Mon Sep 17 00:00:00 2001
From: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Date: Thu, 15 Apr 2021 16:32:57 +0800
Subject: PCI: dwc/intel-gw: Remove unused function
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fix the following clang warning:

drivers/pci/controller/dwc/pcie-intel-gw.c:84:19: warning: unused
function 'pcie_app_rd' [-Wunused-function].

Link: https://lore.kernel.org/r/1618475577-99198-1-git-send-email-jiapeng.chong@linux.alibaba.com
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
---
 drivers/pci/controller/dwc/pcie-intel-gw.c | 5 -----
 1 file changed, 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/dwc/pcie-intel-gw.c b/drivers/pci/controller/dwc/pcie-intel-gw.c
index 0cedd1f95f37..f89a7d24ba28 100644
--- a/drivers/pci/controller/dwc/pcie-intel-gw.c
+++ b/drivers/pci/controller/dwc/pcie-intel-gw.c
@@ -81,11 +81,6 @@ static void pcie_update_bits(void __iomem *base, u32 ofs, u32 mask, u32 val)
 		writel(val, base + ofs);
 }
 
-static inline u32 pcie_app_rd(struct intel_pcie_port *lpp, u32 ofs)
-{
-	return readl(lpp->app_base + ofs);
-}
-
 static inline void pcie_app_wr(struct intel_pcie_port *lpp, u32 ofs, u32 val)
 {
 	writel(val, lpp->app_base + ofs);
-- 
cgit v1.2.3


From 8bcca26585585ae4b44d25d30f351ad0afa4976b Mon Sep 17 00:00:00 2001
From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Date: Tue, 13 Apr 2021 17:22:19 +0300
Subject: PCI: dwc: Move iATU detection earlier

dw_pcie_ep_init() depends on the detected iATU region numbers to allocate
the in/outbound window management bitmap.  It fails after 281f1f99cf3a
("PCI: dwc: Detect number of iATU windows").

Move the iATU region detection into a new function, move the detection to
the very beginning of dw_pcie_host_init() and dw_pcie_ep_init().  Also
remove it from the dw_pcie_setup(), since it's more like a software
initialization step than hardware setup.

Link: https://lore.kernel.org/r/20210125044803.4310-1-Zhiqiang.Hou@nxp.com
Link: https://lore.kernel.org/linux-pci/20210407131255.702054-1-dmitry.baryshkov@linaro.org
Link: https://lore.kernel.org/r/20210413142219.2301430-1-dmitry.baryshkov@linaro.org
Fixes: 281f1f99cf3a ("PCI: dwc: Detect number of iATU windows")
Tested-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
[DB: moved dw_pcie_iatu_detect to happen after host_init callback]
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: stable@vger.kernel.org	# v5.11+
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
---
 drivers/pci/controller/dwc/pcie-designware-ep.c   |  2 ++
 drivers/pci/controller/dwc/pcie-designware-host.c |  1 +
 drivers/pci/controller/dwc/pcie-designware.c      | 11 ++++++++---
 drivers/pci/controller/dwc/pcie-designware.h      |  1 +
 4 files changed, 12 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index 1c25d8337151..8d028a88b375 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -705,6 +705,8 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 		}
 	}
 
+	dw_pcie_iatu_detect(pci);
+
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
 	if (!res)
 		return -EINVAL;
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index e6c274f4485c..a608ae1fad57 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -398,6 +398,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
 		if (ret)
 			goto err_free_msi;
 	}
+	dw_pcie_iatu_detect(pci);
 
 	dw_pcie_setup_rc(pp);
 
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index 004cb860e266..a945f0c0e73d 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -660,11 +660,9 @@ static void dw_pcie_iatu_detect_regions(struct dw_pcie *pci)
 	pci->num_ob_windows = ob;
 }
 
-void dw_pcie_setup(struct dw_pcie *pci)
+void dw_pcie_iatu_detect(struct dw_pcie *pci)
 {
-	u32 val;
 	struct device *dev = pci->dev;
-	struct device_node *np = dev->of_node;
 	struct platform_device *pdev = to_platform_device(dev);
 
 	if (pci->version >= 0x480A || (!pci->version &&
@@ -693,6 +691,13 @@ void dw_pcie_setup(struct dw_pcie *pci)
 
 	dev_info(pci->dev, "Detected iATU regions: %u outbound, %u inbound",
 		 pci->num_ob_windows, pci->num_ib_windows);
+}
+
+void dw_pcie_setup(struct dw_pcie *pci)
+{
+	u32 val;
+	struct device *dev = pci->dev;
+	struct device_node *np = dev->of_node;
 
 	if (pci->link_gen > 0)
 		dw_pcie_link_set_max_speed(pci, pci->link_gen);
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 7247c8b01f04..7d6e9b7576be 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -306,6 +306,7 @@ int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, u8 func_no, int index,
 void dw_pcie_disable_atu(struct dw_pcie *pci, int index,
 			 enum dw_pcie_region_type type);
 void dw_pcie_setup(struct dw_pcie *pci);
+void dw_pcie_iatu_detect(struct dw_pcie *pci);
 
 static inline void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)
 {
-- 
cgit v1.2.3


From d3bf75b579b980b9d83a76d3b4d8bfb9f55b24ca Mon Sep 17 00:00:00 2001
From: Jianjun Wang <jianjun.wang@mediatek.com>
Date: Tue, 20 Apr 2021 14:17:19 +0800
Subject: PCI: mediatek-gen3: Add MediaTek Gen3 driver for MT8192

MediaTek's PCIe host controller has three generation HWs, the new
generation HW is an individual bridge, it supports Gen3 speed and
compatible with Gen2, Gen1 speed.

Add support for new Gen3 controller which can be found on MT8192.

Link: https://lore.kernel.org/r/20210420061723.989-4-jianjun.wang@mediatek.com
Signed-off-by: Jianjun Wang <jianjun.wang@mediatek.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Ryder Lee <ryder.lee@mediatek.com>
---
 drivers/pci/controller/Kconfig              |  13 +
 drivers/pci/controller/Makefile             |   1 +
 drivers/pci/controller/pcie-mediatek-gen3.c | 466 ++++++++++++++++++++++++++++
 3 files changed, 480 insertions(+)
 create mode 100644 drivers/pci/controller/pcie-mediatek-gen3.c

(limited to 'drivers')

diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index 5aa8977d7b0f..1e925ac47279 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -233,6 +233,19 @@ config PCIE_MEDIATEK
 	  Say Y here if you want to enable PCIe controller support on
 	  MediaTek SoCs.
 
+config PCIE_MEDIATEK_GEN3
+	tristate "MediaTek Gen3 PCIe controller"
+	depends on ARCH_MEDIATEK || COMPILE_TEST
+	depends on PCI_MSI_IRQ_DOMAIN
+	help
+	  Adds support for PCIe Gen3 MAC controller for MediaTek SoCs.
+	  This PCIe controller is compatible with Gen3, Gen2 and Gen1 speed,
+	  and support up to 256 MSI interrupt numbers for
+	  multi-function devices.
+
+	  Say Y here if you want to enable Gen3 PCIe controller support on
+	  MediaTek SoCs.
+
 config VMD
 	depends on PCI_MSI && X86_64 && SRCU
 	tristate "Intel Volume Management Device Driver"
diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile
index e4559f2182f2..579973327815 100644
--- a/drivers/pci/controller/Makefile
+++ b/drivers/pci/controller/Makefile
@@ -27,6 +27,7 @@ obj-$(CONFIG_PCIE_ROCKCHIP) += pcie-rockchip.o
 obj-$(CONFIG_PCIE_ROCKCHIP_EP) += pcie-rockchip-ep.o
 obj-$(CONFIG_PCIE_ROCKCHIP_HOST) += pcie-rockchip-host.o
 obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o
+obj-$(CONFIG_PCIE_MEDIATEK_GEN3) += pcie-mediatek-gen3.o
 obj-$(CONFIG_PCIE_MICROCHIP_HOST) += pcie-microchip-host.o
 obj-$(CONFIG_VMD) += vmd.o
 obj-$(CONFIG_PCIE_BRCMSTB) += pcie-brcmstb.o
diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c
new file mode 100644
index 000000000000..078d8408150f
--- /dev/null
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -0,0 +1,466 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MediaTek PCIe host controller driver.
+ *
+ * Copyright (c) 2020 MediaTek Inc.
+ * Author: Jianjun Wang <jianjun.wang@mediatek.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#include "../pci.h"
+
+#define PCIE_SETTING_REG		0x80
+#define PCIE_PCI_IDS_1			0x9c
+#define PCI_CLASS(class)		(class << 8)
+#define PCIE_RC_MODE			BIT(0)
+
+#define PCIE_CFGNUM_REG			0x140
+#define PCIE_CFG_DEVFN(devfn)		((devfn) & GENMASK(7, 0))
+#define PCIE_CFG_BUS(bus)		(((bus) << 8) & GENMASK(15, 8))
+#define PCIE_CFG_BYTE_EN(bytes)		(((bytes) << 16) & GENMASK(19, 16))
+#define PCIE_CFG_FORCE_BYTE_EN		BIT(20)
+#define PCIE_CFG_OFFSET_ADDR		0x1000
+#define PCIE_CFG_HEADER(bus, devfn) \
+	(PCIE_CFG_BUS(bus) | PCIE_CFG_DEVFN(devfn))
+
+#define PCIE_RST_CTRL_REG		0x148
+#define PCIE_MAC_RSTB			BIT(0)
+#define PCIE_PHY_RSTB			BIT(1)
+#define PCIE_BRG_RSTB			BIT(2)
+#define PCIE_PE_RSTB			BIT(3)
+
+#define PCIE_LTSSM_STATUS_REG		0x150
+
+#define PCIE_LINK_STATUS_REG		0x154
+#define PCIE_PORT_LINKUP		BIT(8)
+
+#define PCIE_TRANS_TABLE_BASE_REG	0x800
+#define PCIE_ATR_SRC_ADDR_MSB_OFFSET	0x4
+#define PCIE_ATR_TRSL_ADDR_LSB_OFFSET	0x8
+#define PCIE_ATR_TRSL_ADDR_MSB_OFFSET	0xc
+#define PCIE_ATR_TRSL_PARAM_OFFSET	0x10
+#define PCIE_ATR_TLB_SET_OFFSET		0x20
+
+#define PCIE_MAX_TRANS_TABLES		8
+#define PCIE_ATR_EN			BIT(0)
+#define PCIE_ATR_SIZE(size) \
+	(((((size) - 1) << 1) & GENMASK(6, 1)) | PCIE_ATR_EN)
+#define PCIE_ATR_ID(id)			((id) & GENMASK(3, 0))
+#define PCIE_ATR_TYPE_MEM		PCIE_ATR_ID(0)
+#define PCIE_ATR_TYPE_IO		PCIE_ATR_ID(1)
+#define PCIE_ATR_TLP_TYPE(type)		(((type) << 16) & GENMASK(18, 16))
+#define PCIE_ATR_TLP_TYPE_MEM		PCIE_ATR_TLP_TYPE(0)
+#define PCIE_ATR_TLP_TYPE_IO		PCIE_ATR_TLP_TYPE(2)
+
+/**
+ * struct mtk_pcie_port - PCIe port information
+ * @dev: pointer to PCIe device
+ * @base: IO mapped register base
+ * @reg_base: physical register base
+ * @mac_reset: MAC reset control
+ * @phy_reset: PHY reset control
+ * @phy: PHY controller block
+ * @clks: PCIe clocks
+ * @num_clks: PCIe clocks count for this port
+ */
+struct mtk_pcie_port {
+	struct device *dev;
+	void __iomem *base;
+	phys_addr_t reg_base;
+	struct reset_control *mac_reset;
+	struct reset_control *phy_reset;
+	struct phy *phy;
+	struct clk_bulk_data *clks;
+	int num_clks;
+};
+
+/**
+ * mtk_pcie_config_tlp_header() - Configure a configuration TLP header
+ * @bus: PCI bus to query
+ * @devfn: device/function number
+ * @where: offset in config space
+ * @size: data size in TLP header
+ *
+ * Set byte enable field and device information in configuration TLP header.
+ */
+static void mtk_pcie_config_tlp_header(struct pci_bus *bus, unsigned int devfn,
+					int where, int size)
+{
+	struct mtk_pcie_port *port = bus->sysdata;
+	int bytes;
+	u32 val;
+
+	bytes = (GENMASK(size - 1, 0) & 0xf) << (where & 0x3);
+
+	val = PCIE_CFG_FORCE_BYTE_EN | PCIE_CFG_BYTE_EN(bytes) |
+	      PCIE_CFG_HEADER(bus->number, devfn);
+
+	writel_relaxed(val, port->base + PCIE_CFGNUM_REG);
+}
+
+static void __iomem *mtk_pcie_map_bus(struct pci_bus *bus, unsigned int devfn,
+				      int where)
+{
+	struct mtk_pcie_port *port = bus->sysdata;
+
+	return port->base + PCIE_CFG_OFFSET_ADDR + where;
+}
+
+static int mtk_pcie_config_read(struct pci_bus *bus, unsigned int devfn,
+				int where, int size, u32 *val)
+{
+	mtk_pcie_config_tlp_header(bus, devfn, where, size);
+
+	return pci_generic_config_read32(bus, devfn, where, size, val);
+}
+
+static int mtk_pcie_config_write(struct pci_bus *bus, unsigned int devfn,
+				 int where, int size, u32 val)
+{
+	mtk_pcie_config_tlp_header(bus, devfn, where, size);
+
+	if (size <= 2)
+		val <<= (where & 0x3) * 8;
+
+	return pci_generic_config_write32(bus, devfn, where, 4, val);
+}
+
+static struct pci_ops mtk_pcie_ops = {
+	.map_bus = mtk_pcie_map_bus,
+	.read  = mtk_pcie_config_read,
+	.write = mtk_pcie_config_write,
+};
+
+static int mtk_pcie_set_trans_table(struct mtk_pcie_port *port,
+				    resource_size_t cpu_addr,
+				    resource_size_t pci_addr,
+				    resource_size_t size,
+				    unsigned long type, int num)
+{
+	void __iomem *table;
+	u32 val;
+
+	if (num >= PCIE_MAX_TRANS_TABLES) {
+		dev_err(port->dev, "not enough translate table for addr: %#llx, limited to [%d]\n",
+			(unsigned long long)cpu_addr, PCIE_MAX_TRANS_TABLES);
+		return -ENODEV;
+	}
+
+	table = port->base + PCIE_TRANS_TABLE_BASE_REG +
+		num * PCIE_ATR_TLB_SET_OFFSET;
+
+	writel_relaxed(lower_32_bits(cpu_addr) | PCIE_ATR_SIZE(fls(size) - 1),
+		       table);
+	writel_relaxed(upper_32_bits(cpu_addr),
+		       table + PCIE_ATR_SRC_ADDR_MSB_OFFSET);
+	writel_relaxed(lower_32_bits(pci_addr),
+		       table + PCIE_ATR_TRSL_ADDR_LSB_OFFSET);
+	writel_relaxed(upper_32_bits(pci_addr),
+		       table + PCIE_ATR_TRSL_ADDR_MSB_OFFSET);
+
+	if (type == IORESOURCE_IO)
+		val = PCIE_ATR_TYPE_IO | PCIE_ATR_TLP_TYPE_IO;
+	else
+		val = PCIE_ATR_TYPE_MEM | PCIE_ATR_TLP_TYPE_MEM;
+
+	writel_relaxed(val, table + PCIE_ATR_TRSL_PARAM_OFFSET);
+
+	return 0;
+}
+
+static int mtk_pcie_startup_port(struct mtk_pcie_port *port)
+{
+	struct resource_entry *entry;
+	struct pci_host_bridge *host = pci_host_bridge_from_priv(port);
+	unsigned int table_index = 0;
+	int err;
+	u32 val;
+
+	/* Set as RC mode */
+	val = readl_relaxed(port->base + PCIE_SETTING_REG);
+	val |= PCIE_RC_MODE;
+	writel_relaxed(val, port->base + PCIE_SETTING_REG);
+
+	/* Set class code */
+	val = readl_relaxed(port->base + PCIE_PCI_IDS_1);
+	val &= ~GENMASK(31, 8);
+	val |= PCI_CLASS(PCI_CLASS_BRIDGE_PCI << 8);
+	writel_relaxed(val, port->base + PCIE_PCI_IDS_1);
+
+	/* Assert all reset signals */
+	val = readl_relaxed(port->base + PCIE_RST_CTRL_REG);
+	val |= PCIE_MAC_RSTB | PCIE_PHY_RSTB | PCIE_BRG_RSTB | PCIE_PE_RSTB;
+	writel_relaxed(val, port->base + PCIE_RST_CTRL_REG);
+
+	/*
+	 * Described in PCIe CEM specification setctions 2.2 (PERST# Signal)
+	 * and 2.2.1 (Initial Power-Up (G3 to S0)).
+	 * The deassertion of PERST# should be delayed 100ms (TPVPERL)
+	 * for the power and clock to become stable.
+	 */
+	msleep(100);
+
+	/* De-assert reset signals */
+	val &= ~(PCIE_MAC_RSTB | PCIE_PHY_RSTB | PCIE_BRG_RSTB | PCIE_PE_RSTB);
+	writel_relaxed(val, port->base + PCIE_RST_CTRL_REG);
+
+	/* Check if the link is up or not */
+	err = readl_poll_timeout(port->base + PCIE_LINK_STATUS_REG, val,
+				 !!(val & PCIE_PORT_LINKUP), 20,
+				 PCI_PM_D3COLD_WAIT * USEC_PER_MSEC);
+	if (err) {
+		val = readl_relaxed(port->base + PCIE_LTSSM_STATUS_REG);
+		dev_err(port->dev, "PCIe link down, ltssm reg val: %#x\n", val);
+		return err;
+	}
+
+	/* Set PCIe translation windows */
+	resource_list_for_each_entry(entry, &host->windows) {
+		struct resource *res = entry->res;
+		unsigned long type = resource_type(res);
+		resource_size_t cpu_addr;
+		resource_size_t pci_addr;
+		resource_size_t size;
+		const char *range_type;
+
+		if (type == IORESOURCE_IO) {
+			cpu_addr = pci_pio_to_address(res->start);
+			range_type = "IO";
+		} else if (type == IORESOURCE_MEM) {
+			cpu_addr = res->start;
+			range_type = "MEM";
+		} else {
+			continue;
+		}
+
+		pci_addr = res->start - entry->offset;
+		size = resource_size(res);
+		err = mtk_pcie_set_trans_table(port, cpu_addr, pci_addr, size,
+					       type, table_index);
+		if (err)
+			return err;
+
+		dev_dbg(port->dev, "set %s trans window[%d]: cpu_addr = %#llx, pci_addr = %#llx, size = %#llx\n",
+			range_type, table_index, (unsigned long long)cpu_addr,
+			(unsigned long long)pci_addr, (unsigned long long)size);
+
+		table_index++;
+	}
+
+	return 0;
+}
+
+static int mtk_pcie_parse_port(struct mtk_pcie_port *port)
+{
+	struct device *dev = port->dev;
+	struct platform_device *pdev = to_platform_device(dev);
+	struct resource *regs;
+	int ret;
+
+	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcie-mac");
+	if (!regs)
+		return -EINVAL;
+	port->base = devm_ioremap_resource(dev, regs);
+	if (IS_ERR(port->base)) {
+		dev_err(dev, "failed to map register base\n");
+		return PTR_ERR(port->base);
+	}
+
+	port->reg_base = regs->start;
+
+	port->phy_reset = devm_reset_control_get_optional_exclusive(dev, "phy");
+	if (IS_ERR(port->phy_reset)) {
+		ret = PTR_ERR(port->phy_reset);
+		if (ret != -EPROBE_DEFER)
+			dev_err(dev, "failed to get PHY reset\n");
+
+		return ret;
+	}
+
+	port->mac_reset = devm_reset_control_get_optional_exclusive(dev, "mac");
+	if (IS_ERR(port->mac_reset)) {
+		ret = PTR_ERR(port->mac_reset);
+		if (ret != -EPROBE_DEFER)
+			dev_err(dev, "failed to get MAC reset\n");
+
+		return ret;
+	}
+
+	port->phy = devm_phy_optional_get(dev, "pcie-phy");
+	if (IS_ERR(port->phy)) {
+		ret = PTR_ERR(port->phy);
+		if (ret != -EPROBE_DEFER)
+			dev_err(dev, "failed to get PHY\n");
+
+		return ret;
+	}
+
+	port->num_clks = devm_clk_bulk_get_all(dev, &port->clks);
+	if (port->num_clks < 0) {
+		dev_err(dev, "failed to get clocks\n");
+		return port->num_clks;
+	}
+
+	return 0;
+}
+
+static int mtk_pcie_power_up(struct mtk_pcie_port *port)
+{
+	struct device *dev = port->dev;
+	int err;
+
+	/* PHY power on and enable pipe clock */
+	reset_control_deassert(port->phy_reset);
+
+	err = phy_init(port->phy);
+	if (err) {
+		dev_err(dev, "failed to initialize PHY\n");
+		goto err_phy_init;
+	}
+
+	err = phy_power_on(port->phy);
+	if (err) {
+		dev_err(dev, "failed to power on PHY\n");
+		goto err_phy_on;
+	}
+
+	/* MAC power on and enable transaction layer clocks */
+	reset_control_deassert(port->mac_reset);
+
+	pm_runtime_enable(dev);
+	pm_runtime_get_sync(dev);
+
+	err = clk_bulk_prepare_enable(port->num_clks, port->clks);
+	if (err) {
+		dev_err(dev, "failed to enable clocks\n");
+		goto err_clk_init;
+	}
+
+	return 0;
+
+err_clk_init:
+	pm_runtime_put_sync(dev);
+	pm_runtime_disable(dev);
+	reset_control_assert(port->mac_reset);
+	phy_power_off(port->phy);
+err_phy_on:
+	phy_exit(port->phy);
+err_phy_init:
+	reset_control_assert(port->phy_reset);
+
+	return err;
+}
+
+static void mtk_pcie_power_down(struct mtk_pcie_port *port)
+{
+	clk_bulk_disable_unprepare(port->num_clks, port->clks);
+
+	pm_runtime_put_sync(port->dev);
+	pm_runtime_disable(port->dev);
+	reset_control_assert(port->mac_reset);
+
+	phy_power_off(port->phy);
+	phy_exit(port->phy);
+	reset_control_assert(port->phy_reset);
+}
+
+static int mtk_pcie_setup(struct mtk_pcie_port *port)
+{
+	int err;
+
+	err = mtk_pcie_parse_port(port);
+	if (err)
+		return err;
+
+	/* Don't touch the hardware registers before power up */
+	err = mtk_pcie_power_up(port);
+	if (err)
+		return err;
+
+	/* Try link up */
+	err = mtk_pcie_startup_port(port);
+	if (err)
+		goto err_setup;
+
+	return 0;
+
+err_setup:
+	mtk_pcie_power_down(port);
+
+	return err;
+}
+
+static int mtk_pcie_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mtk_pcie_port *port;
+	struct pci_host_bridge *host;
+	int err;
+
+	host = devm_pci_alloc_host_bridge(dev, sizeof(*port));
+	if (!host)
+		return -ENOMEM;
+
+	port = pci_host_bridge_priv(host);
+
+	port->dev = dev;
+	platform_set_drvdata(pdev, port);
+
+	err = mtk_pcie_setup(port);
+	if (err)
+		return err;
+
+	host->ops = &mtk_pcie_ops;
+	host->sysdata = port;
+
+	err = pci_host_probe(host);
+	if (err) {
+		mtk_pcie_power_down(port);
+		return err;
+	}
+
+	return 0;
+}
+
+static int mtk_pcie_remove(struct platform_device *pdev)
+{
+	struct mtk_pcie_port *port = platform_get_drvdata(pdev);
+	struct pci_host_bridge *host = pci_host_bridge_from_priv(port);
+
+	pci_lock_rescan_remove();
+	pci_stop_root_bus(host->bus);
+	pci_remove_root_bus(host->bus);
+	pci_unlock_rescan_remove();
+
+	mtk_pcie_power_down(port);
+
+	return 0;
+}
+
+static const struct of_device_id mtk_pcie_of_match[] = {
+	{ .compatible = "mediatek,mt8192-pcie" },
+	{},
+};
+
+static struct platform_driver mtk_pcie_driver = {
+	.probe = mtk_pcie_probe,
+	.remove = mtk_pcie_remove,
+	.driver = {
+		.name = "mtk-pcie",
+		.of_match_table = mtk_pcie_of_match,
+	},
+};
+
+module_platform_driver(mtk_pcie_driver);
+MODULE_LICENSE("GPL v2");
-- 
cgit v1.2.3


From 814cceebba9b7d1306b8d49587ffb0e81f7b73af Mon Sep 17 00:00:00 2001
From: Jianjun Wang <jianjun.wang@mediatek.com>
Date: Tue, 20 Apr 2021 14:17:20 +0800
Subject: PCI: mediatek-gen3: Add INTx support

Add INTx support for MediaTek Gen3 PCIe controller.

Link: https://lore.kernel.org/r/20210420061723.989-5-jianjun.wang@mediatek.com
Signed-off-by: Jianjun Wang <jianjun.wang@mediatek.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Acked-by: Ryder Lee <ryder.lee@mediatek.com>
---
 drivers/pci/controller/pcie-mediatek-gen3.c | 172 ++++++++++++++++++++++++++++
 1 file changed, 172 insertions(+)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c
index 078d8408150f..9134e871bff9 100644
--- a/drivers/pci/controller/pcie-mediatek-gen3.c
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -9,6 +9,9 @@
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/iopoll.h>
+#include <linux/irq.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdomain.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/pci.h>
@@ -45,6 +48,13 @@
 #define PCIE_LINK_STATUS_REG		0x154
 #define PCIE_PORT_LINKUP		BIT(8)
 
+#define PCIE_INT_ENABLE_REG		0x180
+#define PCIE_INTX_SHIFT			24
+#define PCIE_INTX_ENABLE \
+	GENMASK(PCIE_INTX_SHIFT + PCI_NUM_INTX - 1, PCIE_INTX_SHIFT)
+
+#define PCIE_INT_STATUS_REG		0x184
+
 #define PCIE_TRANS_TABLE_BASE_REG	0x800
 #define PCIE_ATR_SRC_ADDR_MSB_OFFSET	0x4
 #define PCIE_ATR_TRSL_ADDR_LSB_OFFSET	0x8
@@ -73,6 +83,9 @@
  * @phy: PHY controller block
  * @clks: PCIe clocks
  * @num_clks: PCIe clocks count for this port
+ * @irq: PCIe controller interrupt number
+ * @irq_lock: lock protecting IRQ register access
+ * @intx_domain: legacy INTx IRQ domain
  */
 struct mtk_pcie_port {
 	struct device *dev;
@@ -83,6 +96,10 @@ struct mtk_pcie_port {
 	struct phy *phy;
 	struct clk_bulk_data *clks;
 	int num_clks;
+
+	int irq;
+	raw_spinlock_t irq_lock;
+	struct irq_domain *intx_domain;
 };
 
 /**
@@ -198,6 +215,11 @@ static int mtk_pcie_startup_port(struct mtk_pcie_port *port)
 	val |= PCI_CLASS(PCI_CLASS_BRIDGE_PCI << 8);
 	writel_relaxed(val, port->base + PCIE_PCI_IDS_1);
 
+	/* Mask all INTx interrupts */
+	val = readl_relaxed(port->base + PCIE_INT_ENABLE_REG);
+	val &= ~PCIE_INTX_ENABLE;
+	writel_relaxed(val, port->base + PCIE_INT_ENABLE_REG);
+
 	/* Assert all reset signals */
 	val = readl_relaxed(port->base + PCIE_RST_CTRL_REG);
 	val |= PCIE_MAC_RSTB | PCIE_PHY_RSTB | PCIE_BRG_RSTB | PCIE_PE_RSTB;
@@ -261,6 +283,150 @@ static int mtk_pcie_startup_port(struct mtk_pcie_port *port)
 	return 0;
 }
 
+static int mtk_pcie_set_affinity(struct irq_data *data,
+				 const struct cpumask *mask, bool force)
+{
+	return -EINVAL;
+}
+
+static void mtk_intx_mask(struct irq_data *data)
+{
+	struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data);
+	unsigned long flags;
+	u32 val;
+
+	raw_spin_lock_irqsave(&port->irq_lock, flags);
+	val = readl_relaxed(port->base + PCIE_INT_ENABLE_REG);
+	val &= ~BIT(data->hwirq + PCIE_INTX_SHIFT);
+	writel_relaxed(val, port->base + PCIE_INT_ENABLE_REG);
+	raw_spin_unlock_irqrestore(&port->irq_lock, flags);
+}
+
+static void mtk_intx_unmask(struct irq_data *data)
+{
+	struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data);
+	unsigned long flags;
+	u32 val;
+
+	raw_spin_lock_irqsave(&port->irq_lock, flags);
+	val = readl_relaxed(port->base + PCIE_INT_ENABLE_REG);
+	val |= BIT(data->hwirq + PCIE_INTX_SHIFT);
+	writel_relaxed(val, port->base + PCIE_INT_ENABLE_REG);
+	raw_spin_unlock_irqrestore(&port->irq_lock, flags);
+}
+
+/**
+ * mtk_intx_eoi() - Clear INTx IRQ status at the end of interrupt
+ * @data: pointer to chip specific data
+ *
+ * As an emulated level IRQ, its interrupt status will remain
+ * until the corresponding de-assert message is received; hence that
+ * the status can only be cleared when the interrupt has been serviced.
+ */
+static void mtk_intx_eoi(struct irq_data *data)
+{
+	struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data);
+	unsigned long hwirq;
+
+	hwirq = data->hwirq + PCIE_INTX_SHIFT;
+	writel_relaxed(BIT(hwirq), port->base + PCIE_INT_STATUS_REG);
+}
+
+static struct irq_chip mtk_intx_irq_chip = {
+	.irq_mask		= mtk_intx_mask,
+	.irq_unmask		= mtk_intx_unmask,
+	.irq_eoi		= mtk_intx_eoi,
+	.irq_set_affinity	= mtk_pcie_set_affinity,
+	.name			= "INTx",
+};
+
+static int mtk_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
+			     irq_hw_number_t hwirq)
+{
+	irq_set_chip_data(irq, domain->host_data);
+	irq_set_chip_and_handler_name(irq, &mtk_intx_irq_chip,
+				      handle_fasteoi_irq, "INTx");
+	return 0;
+}
+
+static const struct irq_domain_ops intx_domain_ops = {
+	.map = mtk_pcie_intx_map,
+};
+
+static int mtk_pcie_init_irq_domains(struct mtk_pcie_port *port)
+{
+	struct device *dev = port->dev;
+	struct device_node *intc_node, *node = dev->of_node;
+
+	raw_spin_lock_init(&port->irq_lock);
+
+	/* Setup INTx */
+	intc_node = of_get_child_by_name(node, "interrupt-controller");
+	if (!intc_node) {
+		dev_err(dev, "missing interrupt-controller node\n");
+		return -ENODEV;
+	}
+
+	port->intx_domain = irq_domain_add_linear(intc_node, PCI_NUM_INTX,
+						  &intx_domain_ops, port);
+	if (!port->intx_domain) {
+		dev_err(dev, "failed to create INTx IRQ domain\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static void mtk_pcie_irq_teardown(struct mtk_pcie_port *port)
+{
+	irq_set_chained_handler_and_data(port->irq, NULL, NULL);
+
+	if (port->intx_domain)
+		irq_domain_remove(port->intx_domain);
+
+	irq_dispose_mapping(port->irq);
+}
+
+static void mtk_pcie_irq_handler(struct irq_desc *desc)
+{
+	struct mtk_pcie_port *port = irq_desc_get_handler_data(desc);
+	struct irq_chip *irqchip = irq_desc_get_chip(desc);
+	unsigned long status;
+	unsigned int virq;
+	irq_hw_number_t irq_bit = PCIE_INTX_SHIFT;
+
+	chained_irq_enter(irqchip, desc);
+
+	status = readl_relaxed(port->base + PCIE_INT_STATUS_REG);
+	for_each_set_bit_from(irq_bit, &status, PCI_NUM_INTX +
+			      PCIE_INTX_SHIFT) {
+		virq = irq_find_mapping(port->intx_domain,
+					irq_bit - PCIE_INTX_SHIFT);
+		generic_handle_irq(virq);
+	}
+
+	chained_irq_exit(irqchip, desc);
+}
+
+static int mtk_pcie_setup_irq(struct mtk_pcie_port *port)
+{
+	struct device *dev = port->dev;
+	struct platform_device *pdev = to_platform_device(dev);
+	int err;
+
+	err = mtk_pcie_init_irq_domains(port);
+	if (err)
+		return err;
+
+	port->irq = platform_get_irq(pdev, 0);
+	if (port->irq < 0)
+		return port->irq;
+
+	irq_set_chained_handler_and_data(port->irq, mtk_pcie_irq_handler, port);
+
+	return 0;
+}
+
 static int mtk_pcie_parse_port(struct mtk_pcie_port *port)
 {
 	struct device *dev = port->dev;
@@ -393,6 +559,10 @@ static int mtk_pcie_setup(struct mtk_pcie_port *port)
 	if (err)
 		goto err_setup;
 
+	err = mtk_pcie_setup_irq(port);
+	if (err)
+		goto err_setup;
+
 	return 0;
 
 err_setup:
@@ -426,6 +596,7 @@ static int mtk_pcie_probe(struct platform_device *pdev)
 
 	err = pci_host_probe(host);
 	if (err) {
+		mtk_pcie_irq_teardown(port);
 		mtk_pcie_power_down(port);
 		return err;
 	}
@@ -443,6 +614,7 @@ static int mtk_pcie_remove(struct platform_device *pdev)
 	pci_remove_root_bus(host->bus);
 	pci_unlock_rescan_remove();
 
+	mtk_pcie_irq_teardown(port);
 	mtk_pcie_power_down(port);
 
 	return 0;
-- 
cgit v1.2.3


From 1bdafba538be706b185c7aded0d42327702d92b7 Mon Sep 17 00:00:00 2001
From: Jianjun Wang <jianjun.wang@mediatek.com>
Date: Tue, 20 Apr 2021 14:17:21 +0800
Subject: PCI: mediatek-gen3: Add MSI support

Add MSI support for MediaTek Gen3 PCIe controller.

This PCIe controller supports up to 256 MSI vectors, the MSI hardware
block diagram is as follows:

                  +-----+
                  | GIC |
                  +-----+
                     ^
                     |
                 port->irq
                     |
             +-+-+-+-+-+-+-+-+
             |0|1|2|3|4|5|6|7| (PCIe intc)
             +-+-+-+-+-+-+-+-+
              ^ ^           ^
              | |    ...    |
      +-------+ +------+    +-----------+
      |                |                |
+-+-+---+--+--+  +-+-+---+--+--+  +-+-+---+--+--+
|0|1|...|30|31|  |0|1|...|30|31|  |0|1|...|30|31| (MSI sets)
+-+-+---+--+--+  +-+-+---+--+--+  +-+-+---+--+--+
 ^ ^      ^  ^    ^ ^      ^  ^    ^ ^      ^  ^
 | |      |  |    | |      |  |    | |      |  |  (MSI vectors)
 | |      |  |    | |      |  |    | |      |  |

  (MSI SET0)       (MSI SET1)  ...   (MSI SET7)

With 256 MSI vectors supported, the MSI vectors are composed of 8 sets,
each set has its own address for MSI message, and supports 32 MSI vectors
to generate interrupt.

Link: https://lore.kernel.org/r/20210420061723.989-6-jianjun.wang@mediatek.com
Signed-off-by: Jianjun Wang <jianjun.wang@mediatek.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Acked-by: Ryder Lee <ryder.lee@mediatek.com>
---
 drivers/pci/controller/pcie-mediatek-gen3.c | 276 ++++++++++++++++++++++++++++
 1 file changed, 276 insertions(+)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c
index 9134e871bff9..98a2eee75a0a 100644
--- a/drivers/pci/controller/pcie-mediatek-gen3.c
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -14,6 +14,7 @@
 #include <linux/irqdomain.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/msi.h>
 #include <linux/pci.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
@@ -48,12 +49,29 @@
 #define PCIE_LINK_STATUS_REG		0x154
 #define PCIE_PORT_LINKUP		BIT(8)
 
+#define PCIE_MSI_SET_NUM		8
+#define PCIE_MSI_IRQS_PER_SET		32
+#define PCIE_MSI_IRQS_NUM \
+	(PCIE_MSI_IRQS_PER_SET * PCIE_MSI_SET_NUM)
+
 #define PCIE_INT_ENABLE_REG		0x180
+#define PCIE_MSI_ENABLE			GENMASK(PCIE_MSI_SET_NUM + 8 - 1, 8)
+#define PCIE_MSI_SHIFT			8
 #define PCIE_INTX_SHIFT			24
 #define PCIE_INTX_ENABLE \
 	GENMASK(PCIE_INTX_SHIFT + PCI_NUM_INTX - 1, PCIE_INTX_SHIFT)
 
 #define PCIE_INT_STATUS_REG		0x184
+#define PCIE_MSI_SET_ENABLE_REG		0x190
+#define PCIE_MSI_SET_ENABLE		GENMASK(PCIE_MSI_SET_NUM - 1, 0)
+
+#define PCIE_MSI_SET_BASE_REG		0xc00
+#define PCIE_MSI_SET_OFFSET		0x10
+#define PCIE_MSI_SET_STATUS_OFFSET	0x04
+#define PCIE_MSI_SET_ENABLE_OFFSET	0x08
+
+#define PCIE_MSI_SET_ADDR_HI_BASE	0xc80
+#define PCIE_MSI_SET_ADDR_HI_OFFSET	0x04
 
 #define PCIE_TRANS_TABLE_BASE_REG	0x800
 #define PCIE_ATR_SRC_ADDR_MSB_OFFSET	0x4
@@ -73,6 +91,16 @@
 #define PCIE_ATR_TLP_TYPE_MEM		PCIE_ATR_TLP_TYPE(0)
 #define PCIE_ATR_TLP_TYPE_IO		PCIE_ATR_TLP_TYPE(2)
 
+/**
+ * struct mtk_msi_set - MSI information for each set
+ * @base: IO mapped register base
+ * @msg_addr: MSI message address
+ */
+struct mtk_msi_set {
+	void __iomem *base;
+	phys_addr_t msg_addr;
+};
+
 /**
  * struct mtk_pcie_port - PCIe port information
  * @dev: pointer to PCIe device
@@ -86,6 +114,11 @@
  * @irq: PCIe controller interrupt number
  * @irq_lock: lock protecting IRQ register access
  * @intx_domain: legacy INTx IRQ domain
+ * @msi_domain: MSI IRQ domain
+ * @msi_bottom_domain: MSI IRQ bottom domain
+ * @msi_sets: MSI sets information
+ * @lock: lock protecting IRQ bit map
+ * @msi_irq_in_use: bit map for assigned MSI IRQ
  */
 struct mtk_pcie_port {
 	struct device *dev;
@@ -100,6 +133,11 @@ struct mtk_pcie_port {
 	int irq;
 	raw_spinlock_t irq_lock;
 	struct irq_domain *intx_domain;
+	struct irq_domain *msi_domain;
+	struct irq_domain *msi_bottom_domain;
+	struct mtk_msi_set msi_sets[PCIE_MSI_SET_NUM];
+	struct mutex lock;
+	DECLARE_BITMAP(msi_irq_in_use, PCIE_MSI_IRQS_NUM);
 };
 
 /**
@@ -196,6 +234,35 @@ static int mtk_pcie_set_trans_table(struct mtk_pcie_port *port,
 	return 0;
 }
 
+static void mtk_pcie_enable_msi(struct mtk_pcie_port *port)
+{
+	int i;
+	u32 val;
+
+	for (i = 0; i < PCIE_MSI_SET_NUM; i++) {
+		struct mtk_msi_set *msi_set = &port->msi_sets[i];
+
+		msi_set->base = port->base + PCIE_MSI_SET_BASE_REG +
+				i * PCIE_MSI_SET_OFFSET;
+		msi_set->msg_addr = port->reg_base + PCIE_MSI_SET_BASE_REG +
+				    i * PCIE_MSI_SET_OFFSET;
+
+		/* Configure the MSI capture address */
+		writel_relaxed(lower_32_bits(msi_set->msg_addr), msi_set->base);
+		writel_relaxed(upper_32_bits(msi_set->msg_addr),
+			       port->base + PCIE_MSI_SET_ADDR_HI_BASE +
+			       i * PCIE_MSI_SET_ADDR_HI_OFFSET);
+	}
+
+	val = readl_relaxed(port->base + PCIE_MSI_SET_ENABLE_REG);
+	val |= PCIE_MSI_SET_ENABLE;
+	writel_relaxed(val, port->base + PCIE_MSI_SET_ENABLE_REG);
+
+	val = readl_relaxed(port->base + PCIE_INT_ENABLE_REG);
+	val |= PCIE_MSI_ENABLE;
+	writel_relaxed(val, port->base + PCIE_INT_ENABLE_REG);
+}
+
 static int mtk_pcie_startup_port(struct mtk_pcie_port *port)
 {
 	struct resource_entry *entry;
@@ -247,6 +314,8 @@ static int mtk_pcie_startup_port(struct mtk_pcie_port *port)
 		return err;
 	}
 
+	mtk_pcie_enable_msi(port);
+
 	/* Set PCIe translation windows */
 	resource_list_for_each_entry(entry, &host->windows) {
 		struct resource *res = entry->res;
@@ -289,6 +358,147 @@ static int mtk_pcie_set_affinity(struct irq_data *data,
 	return -EINVAL;
 }
 
+static void mtk_pcie_msi_irq_mask(struct irq_data *data)
+{
+	pci_msi_mask_irq(data);
+	irq_chip_mask_parent(data);
+}
+
+static void mtk_pcie_msi_irq_unmask(struct irq_data *data)
+{
+	pci_msi_unmask_irq(data);
+	irq_chip_unmask_parent(data);
+}
+
+static struct irq_chip mtk_msi_irq_chip = {
+	.irq_ack = irq_chip_ack_parent,
+	.irq_mask = mtk_pcie_msi_irq_mask,
+	.irq_unmask = mtk_pcie_msi_irq_unmask,
+	.name = "MSI",
+};
+
+static struct msi_domain_info mtk_msi_domain_info = {
+	.flags	= (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
+		   MSI_FLAG_PCI_MSIX | MSI_FLAG_MULTI_PCI_MSI),
+	.chip	= &mtk_msi_irq_chip,
+};
+
+static void mtk_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
+{
+	struct mtk_msi_set *msi_set = irq_data_get_irq_chip_data(data);
+	struct mtk_pcie_port *port = data->domain->host_data;
+	unsigned long hwirq;
+
+	hwirq =	data->hwirq % PCIE_MSI_IRQS_PER_SET;
+
+	msg->address_hi = upper_32_bits(msi_set->msg_addr);
+	msg->address_lo = lower_32_bits(msi_set->msg_addr);
+	msg->data = hwirq;
+	dev_dbg(port->dev, "msi#%#lx address_hi %#x address_lo %#x data %d\n",
+		hwirq, msg->address_hi, msg->address_lo, msg->data);
+}
+
+static void mtk_msi_bottom_irq_ack(struct irq_data *data)
+{
+	struct mtk_msi_set *msi_set = irq_data_get_irq_chip_data(data);
+	unsigned long hwirq;
+
+	hwirq =	data->hwirq % PCIE_MSI_IRQS_PER_SET;
+
+	writel_relaxed(BIT(hwirq), msi_set->base + PCIE_MSI_SET_STATUS_OFFSET);
+}
+
+static void mtk_msi_bottom_irq_mask(struct irq_data *data)
+{
+	struct mtk_msi_set *msi_set = irq_data_get_irq_chip_data(data);
+	struct mtk_pcie_port *port = data->domain->host_data;
+	unsigned long hwirq, flags;
+	u32 val;
+
+	hwirq =	data->hwirq % PCIE_MSI_IRQS_PER_SET;
+
+	raw_spin_lock_irqsave(&port->irq_lock, flags);
+	val = readl_relaxed(msi_set->base + PCIE_MSI_SET_ENABLE_OFFSET);
+	val &= ~BIT(hwirq);
+	writel_relaxed(val, msi_set->base + PCIE_MSI_SET_ENABLE_OFFSET);
+	raw_spin_unlock_irqrestore(&port->irq_lock, flags);
+}
+
+static void mtk_msi_bottom_irq_unmask(struct irq_data *data)
+{
+	struct mtk_msi_set *msi_set = irq_data_get_irq_chip_data(data);
+	struct mtk_pcie_port *port = data->domain->host_data;
+	unsigned long hwirq, flags;
+	u32 val;
+
+	hwirq =	data->hwirq % PCIE_MSI_IRQS_PER_SET;
+
+	raw_spin_lock_irqsave(&port->irq_lock, flags);
+	val = readl_relaxed(msi_set->base + PCIE_MSI_SET_ENABLE_OFFSET);
+	val |= BIT(hwirq);
+	writel_relaxed(val, msi_set->base + PCIE_MSI_SET_ENABLE_OFFSET);
+	raw_spin_unlock_irqrestore(&port->irq_lock, flags);
+}
+
+static struct irq_chip mtk_msi_bottom_irq_chip = {
+	.irq_ack		= mtk_msi_bottom_irq_ack,
+	.irq_mask		= mtk_msi_bottom_irq_mask,
+	.irq_unmask		= mtk_msi_bottom_irq_unmask,
+	.irq_compose_msi_msg	= mtk_compose_msi_msg,
+	.irq_set_affinity	= mtk_pcie_set_affinity,
+	.name			= "MSI",
+};
+
+static int mtk_msi_bottom_domain_alloc(struct irq_domain *domain,
+				       unsigned int virq, unsigned int nr_irqs,
+				       void *arg)
+{
+	struct mtk_pcie_port *port = domain->host_data;
+	struct mtk_msi_set *msi_set;
+	int i, hwirq, set_idx;
+
+	mutex_lock(&port->lock);
+
+	hwirq = bitmap_find_free_region(port->msi_irq_in_use, PCIE_MSI_IRQS_NUM,
+					order_base_2(nr_irqs));
+
+	mutex_unlock(&port->lock);
+
+	if (hwirq < 0)
+		return -ENOSPC;
+
+	set_idx = hwirq / PCIE_MSI_IRQS_PER_SET;
+	msi_set = &port->msi_sets[set_idx];
+
+	for (i = 0; i < nr_irqs; i++)
+		irq_domain_set_info(domain, virq + i, hwirq + i,
+				    &mtk_msi_bottom_irq_chip, msi_set,
+				    handle_edge_irq, NULL, NULL);
+
+	return 0;
+}
+
+static void mtk_msi_bottom_domain_free(struct irq_domain *domain,
+				       unsigned int virq, unsigned int nr_irqs)
+{
+	struct mtk_pcie_port *port = domain->host_data;
+	struct irq_data *data = irq_domain_get_irq_data(domain, virq);
+
+	mutex_lock(&port->lock);
+
+	bitmap_release_region(port->msi_irq_in_use, data->hwirq,
+			      order_base_2(nr_irqs));
+
+	mutex_unlock(&port->lock);
+
+	irq_domain_free_irqs_common(domain, virq, nr_irqs);
+}
+
+static const struct irq_domain_ops mtk_msi_bottom_domain_ops = {
+	.alloc = mtk_msi_bottom_domain_alloc,
+	.free = mtk_msi_bottom_domain_free,
+};
+
 static void mtk_intx_mask(struct irq_data *data)
 {
 	struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data);
@@ -357,6 +567,7 @@ static int mtk_pcie_init_irq_domains(struct mtk_pcie_port *port)
 {
 	struct device *dev = port->dev;
 	struct device_node *intc_node, *node = dev->of_node;
+	int ret;
 
 	raw_spin_lock_init(&port->irq_lock);
 
@@ -374,7 +585,34 @@ static int mtk_pcie_init_irq_domains(struct mtk_pcie_port *port)
 		return -ENODEV;
 	}
 
+	/* Setup MSI */
+	mutex_init(&port->lock);
+
+	port->msi_bottom_domain = irq_domain_add_linear(node, PCIE_MSI_IRQS_NUM,
+				  &mtk_msi_bottom_domain_ops, port);
+	if (!port->msi_bottom_domain) {
+		dev_err(dev, "failed to create MSI bottom domain\n");
+		ret = -ENODEV;
+		goto err_msi_bottom_domain;
+	}
+
+	port->msi_domain = pci_msi_create_irq_domain(dev->fwnode,
+						     &mtk_msi_domain_info,
+						     port->msi_bottom_domain);
+	if (!port->msi_domain) {
+		dev_err(dev, "failed to create MSI domain\n");
+		ret = -ENODEV;
+		goto err_msi_domain;
+	}
+
 	return 0;
+
+err_msi_domain:
+	irq_domain_remove(port->msi_bottom_domain);
+err_msi_bottom_domain:
+	irq_domain_remove(port->intx_domain);
+
+	return ret;
 }
 
 static void mtk_pcie_irq_teardown(struct mtk_pcie_port *port)
@@ -384,9 +622,39 @@ static void mtk_pcie_irq_teardown(struct mtk_pcie_port *port)
 	if (port->intx_domain)
 		irq_domain_remove(port->intx_domain);
 
+	if (port->msi_domain)
+		irq_domain_remove(port->msi_domain);
+
+	if (port->msi_bottom_domain)
+		irq_domain_remove(port->msi_bottom_domain);
+
 	irq_dispose_mapping(port->irq);
 }
 
+static void mtk_pcie_msi_handler(struct mtk_pcie_port *port, int set_idx)
+{
+	struct mtk_msi_set *msi_set = &port->msi_sets[set_idx];
+	unsigned long msi_enable, msi_status;
+	unsigned int virq;
+	irq_hw_number_t bit, hwirq;
+
+	msi_enable = readl_relaxed(msi_set->base + PCIE_MSI_SET_ENABLE_OFFSET);
+
+	do {
+		msi_status = readl_relaxed(msi_set->base +
+					   PCIE_MSI_SET_STATUS_OFFSET);
+		msi_status &= msi_enable;
+		if (!msi_status)
+			break;
+
+		for_each_set_bit(bit, &msi_status, PCIE_MSI_IRQS_PER_SET) {
+			hwirq = bit + set_idx * PCIE_MSI_IRQS_PER_SET;
+			virq = irq_find_mapping(port->msi_bottom_domain, hwirq);
+			generic_handle_irq(virq);
+		}
+	} while (true);
+}
+
 static void mtk_pcie_irq_handler(struct irq_desc *desc)
 {
 	struct mtk_pcie_port *port = irq_desc_get_handler_data(desc);
@@ -405,6 +673,14 @@ static void mtk_pcie_irq_handler(struct irq_desc *desc)
 		generic_handle_irq(virq);
 	}
 
+	irq_bit = PCIE_MSI_SHIFT;
+	for_each_set_bit_from(irq_bit, &status, PCIE_MSI_SET_NUM +
+			      PCIE_MSI_SHIFT) {
+		mtk_pcie_msi_handler(port, irq_bit - PCIE_MSI_SHIFT);
+
+		writel_relaxed(BIT(irq_bit), port->base + PCIE_INT_STATUS_REG);
+	}
+
 	chained_irq_exit(irqchip, desc);
 }
 
-- 
cgit v1.2.3


From d537dc125f0756f7eb9f3a2f878fbe2e3179c452 Mon Sep 17 00:00:00 2001
From: Jianjun Wang <jianjun.wang@mediatek.com>
Date: Tue, 20 Apr 2021 14:17:22 +0800
Subject: PCI: mediatek-gen3: Add system PM support

Add suspend_noirq and resume_noirq callback functions to implement PM
system suspend and resume hooks for the MediaTek Gen3 PCIe controller.

When the system suspends, trigger the PCIe link to enter the L2 state
and pull down the PERST# pin, gating the clocks of the MAC layer, and
then power-off the physical layer to provide power-saving.

When the system resumes, the PCIe link should be re-established and the
related control register values should be restored.

Link: https://lore.kernel.org/r/20210420061723.989-7-jianjun.wang@mediatek.com
Signed-off-by: Jianjun Wang <jianjun.wang@mediatek.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Ryder Lee <ryder.lee@mediatek.com>
---
 drivers/pci/controller/pcie-mediatek-gen3.c | 113 ++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c
index 98a2eee75a0a..3c5b97716d40 100644
--- a/drivers/pci/controller/pcie-mediatek-gen3.c
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -45,6 +45,9 @@
 #define PCIE_PE_RSTB			BIT(3)
 
 #define PCIE_LTSSM_STATUS_REG		0x150
+#define PCIE_LTSSM_STATE_MASK		GENMASK(28, 24)
+#define PCIE_LTSSM_STATE(val)		((val & PCIE_LTSSM_STATE_MASK) >> 24)
+#define PCIE_LTSSM_STATE_L2_IDLE	0x14
 
 #define PCIE_LINK_STATUS_REG		0x154
 #define PCIE_PORT_LINKUP		BIT(8)
@@ -73,6 +76,9 @@
 #define PCIE_MSI_SET_ADDR_HI_BASE	0xc80
 #define PCIE_MSI_SET_ADDR_HI_OFFSET	0x04
 
+#define PCIE_ICMD_PM_REG		0x198
+#define PCIE_TURN_OFF_LINK		BIT(4)
+
 #define PCIE_TRANS_TABLE_BASE_REG	0x800
 #define PCIE_ATR_SRC_ADDR_MSB_OFFSET	0x4
 #define PCIE_ATR_TRSL_ADDR_LSB_OFFSET	0x8
@@ -95,10 +101,12 @@
  * struct mtk_msi_set - MSI information for each set
  * @base: IO mapped register base
  * @msg_addr: MSI message address
+ * @saved_irq_state: IRQ enable state saved at suspend time
  */
 struct mtk_msi_set {
 	void __iomem *base;
 	phys_addr_t msg_addr;
+	u32 saved_irq_state;
 };
 
 /**
@@ -112,6 +120,7 @@ struct mtk_msi_set {
  * @clks: PCIe clocks
  * @num_clks: PCIe clocks count for this port
  * @irq: PCIe controller interrupt number
+ * @saved_irq_state: IRQ enable state saved at suspend time
  * @irq_lock: lock protecting IRQ register access
  * @intx_domain: legacy INTx IRQ domain
  * @msi_domain: MSI IRQ domain
@@ -131,6 +140,7 @@ struct mtk_pcie_port {
 	int num_clks;
 
 	int irq;
+	u32 saved_irq_state;
 	raw_spinlock_t irq_lock;
 	struct irq_domain *intx_domain;
 	struct irq_domain *msi_domain;
@@ -896,6 +906,108 @@ static int mtk_pcie_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static void __maybe_unused mtk_pcie_irq_save(struct mtk_pcie_port *port)
+{
+	int i;
+
+	raw_spin_lock(&port->irq_lock);
+
+	port->saved_irq_state = readl_relaxed(port->base + PCIE_INT_ENABLE_REG);
+
+	for (i = 0; i < PCIE_MSI_SET_NUM; i++) {
+		struct mtk_msi_set *msi_set = &port->msi_sets[i];
+
+		msi_set->saved_irq_state = readl_relaxed(msi_set->base +
+					   PCIE_MSI_SET_ENABLE_OFFSET);
+	}
+
+	raw_spin_unlock(&port->irq_lock);
+}
+
+static void __maybe_unused mtk_pcie_irq_restore(struct mtk_pcie_port *port)
+{
+	int i;
+
+	raw_spin_lock(&port->irq_lock);
+
+	writel_relaxed(port->saved_irq_state, port->base + PCIE_INT_ENABLE_REG);
+
+	for (i = 0; i < PCIE_MSI_SET_NUM; i++) {
+		struct mtk_msi_set *msi_set = &port->msi_sets[i];
+
+		writel_relaxed(msi_set->saved_irq_state,
+			       msi_set->base + PCIE_MSI_SET_ENABLE_OFFSET);
+	}
+
+	raw_spin_unlock(&port->irq_lock);
+}
+
+static int __maybe_unused mtk_pcie_turn_off_link(struct mtk_pcie_port *port)
+{
+	u32 val;
+
+	val = readl_relaxed(port->base + PCIE_ICMD_PM_REG);
+	val |= PCIE_TURN_OFF_LINK;
+	writel_relaxed(val, port->base + PCIE_ICMD_PM_REG);
+
+	/* Check the link is L2 */
+	return readl_poll_timeout(port->base + PCIE_LTSSM_STATUS_REG, val,
+				  (PCIE_LTSSM_STATE(val) ==
+				   PCIE_LTSSM_STATE_L2_IDLE), 20,
+				   50 * USEC_PER_MSEC);
+}
+
+static int __maybe_unused mtk_pcie_suspend_noirq(struct device *dev)
+{
+	struct mtk_pcie_port *port = dev_get_drvdata(dev);
+	int err;
+	u32 val;
+
+	/* Trigger link to L2 state */
+	err = mtk_pcie_turn_off_link(port);
+	if (err) {
+		dev_err(port->dev, "cannot enter L2 state\n");
+		return err;
+	}
+
+	/* Pull down the PERST# pin */
+	val = readl_relaxed(port->base + PCIE_RST_CTRL_REG);
+	val |= PCIE_PE_RSTB;
+	writel_relaxed(val, port->base + PCIE_RST_CTRL_REG);
+
+	dev_dbg(port->dev, "entered L2 states successfully");
+
+	mtk_pcie_irq_save(port);
+	mtk_pcie_power_down(port);
+
+	return 0;
+}
+
+static int __maybe_unused mtk_pcie_resume_noirq(struct device *dev)
+{
+	struct mtk_pcie_port *port = dev_get_drvdata(dev);
+	int err;
+
+	err = mtk_pcie_power_up(port);
+	if (err)
+		return err;
+
+	err = mtk_pcie_startup_port(port);
+	if (err) {
+		mtk_pcie_power_down(port);
+		return err;
+	}
+
+	mtk_pcie_irq_restore(port);
+
+	return 0;
+}
+
+static const struct dev_pm_ops mtk_pcie_pm_ops = {
+	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_pcie_suspend_noirq,
+				      mtk_pcie_resume_noirq)
+};
+
 static const struct of_device_id mtk_pcie_of_match[] = {
 	{ .compatible = "mediatek,mt8192-pcie" },
 	{},
@@ -907,6 +1019,7 @@ static struct platform_driver mtk_pcie_driver = {
 	.driver = {
 		.name = "mtk-pcie",
 		.of_match_table = mtk_pcie_of_match,
+		.pm = &mtk_pcie_pm_ops,
 	},
 };
 
-- 
cgit v1.2.3


From f1ce3986baa62cffc3c5be156994de87524bab99 Mon Sep 17 00:00:00 2001
From: Mathias Krause <minipli@grsecurity.net>
Date: Thu, 29 Apr 2021 19:59:41 +0300
Subject: nitro_enclaves: Fix stale file descriptors on failed usercopy

A failing usercopy of the slot uid will lead to a stale entry in the
file descriptor table as put_unused_fd() won't release it. This enables
userland to refer to a dangling 'file' object through that still valid
file descriptor, leading to all kinds of use-after-free exploitation
scenarios.

Exchanging put_unused_fd() for close_fd(), ksys_close() or alike won't
solve the underlying issue, as the file descriptor might have been
replaced in the meantime, e.g. via userland calling close() on it
(leading to a NULL pointer dereference in the error handling code as
'fget(enclave_fd)' will return a NULL pointer) or by dup2()'ing a
completely different file object to that very file descriptor, leading
to the same situation: a dangling file descriptor pointing to a freed
object -- just in this case to a file object of user's choosing.

Generally speaking, after the call to fd_install() the file descriptor
is live and userland is free to do whatever with it. We cannot rely on
it to still refer to our enclave object afterwards. In fact, by abusing
userfaultfd() userland can hit the condition without any racing and
abuse the error handling in the nitro code as it pleases.

To fix the above issues, defer the call to fd_install() until all
possible errors are handled. In this case it's just the usercopy, so do
it directly in ne_create_vm_ioctl() itself.

Signed-off-by: Mathias Krause <minipli@grsecurity.net>
Signed-off-by: Andra Paraschiv <andraprs@amazon.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210429165941.27020-2-andraprs@amazon.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/virt/nitro_enclaves/ne_misc_dev.c | 43 ++++++++++++-------------------
 1 file changed, 17 insertions(+), 26 deletions(-)

(limited to 'drivers')

diff --git a/drivers/virt/nitro_enclaves/ne_misc_dev.c b/drivers/virt/nitro_enclaves/ne_misc_dev.c
index f1964ea4b826..e21e1e86ad15 100644
--- a/drivers/virt/nitro_enclaves/ne_misc_dev.c
+++ b/drivers/virt/nitro_enclaves/ne_misc_dev.c
@@ -1524,7 +1524,8 @@ static const struct file_operations ne_enclave_fops = {
  *			  enclave file descriptor to be further used for enclave
  *			  resources handling e.g. memory regions and CPUs.
  * @ne_pci_dev :	Private data associated with the PCI device.
- * @slot_uid:		Generated unique slot id associated with an enclave.
+ * @slot_uid:		User pointer to store the generated unique slot id
+ *			associated with an enclave to.
  *
  * Context: Process context. This function is called with the ne_pci_dev enclave
  *	    mutex held.
@@ -1532,7 +1533,7 @@ static const struct file_operations ne_enclave_fops = {
  * * Enclave fd on success.
  * * Negative return value on failure.
  */
-static int ne_create_vm_ioctl(struct ne_pci_dev *ne_pci_dev, u64 *slot_uid)
+static int ne_create_vm_ioctl(struct ne_pci_dev *ne_pci_dev, u64 __user *slot_uid)
 {
 	struct ne_pci_dev_cmd_reply cmd_reply = {};
 	int enclave_fd = -1;
@@ -1634,7 +1635,18 @@ static int ne_create_vm_ioctl(struct ne_pci_dev *ne_pci_dev, u64 *slot_uid)
 
 	list_add(&ne_enclave->enclave_list_entry, &ne_pci_dev->enclaves_list);
 
-	*slot_uid = ne_enclave->slot_uid;
+	if (copy_to_user(slot_uid, &ne_enclave->slot_uid, sizeof(ne_enclave->slot_uid))) {
+		/*
+		 * As we're holding the only reference to 'enclave_file', fput()
+		 * will call ne_enclave_release() which will do a proper cleanup
+		 * of all so far allocated resources, leaving only the unused fd
+		 * for us to free.
+		 */
+		fput(enclave_file);
+		put_unused_fd(enclave_fd);
+
+		return -EFAULT;
+	}
 
 	fd_install(enclave_fd, enclave_file);
 
@@ -1671,34 +1683,13 @@ static long ne_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	switch (cmd) {
 	case NE_CREATE_VM: {
 		int enclave_fd = -1;
-		struct file *enclave_file = NULL;
 		struct ne_pci_dev *ne_pci_dev = ne_devs.ne_pci_dev;
-		int rc = -EINVAL;
-		u64 slot_uid = 0;
+		u64 __user *slot_uid = (void __user *)arg;
 
 		mutex_lock(&ne_pci_dev->enclaves_list_mutex);
-
-		enclave_fd = ne_create_vm_ioctl(ne_pci_dev, &slot_uid);
-		if (enclave_fd < 0) {
-			rc = enclave_fd;
-
-			mutex_unlock(&ne_pci_dev->enclaves_list_mutex);
-
-			return rc;
-		}
-
+		enclave_fd = ne_create_vm_ioctl(ne_pci_dev, slot_uid);
 		mutex_unlock(&ne_pci_dev->enclaves_list_mutex);
 
-		if (copy_to_user((void __user *)arg, &slot_uid, sizeof(slot_uid))) {
-			enclave_file = fget(enclave_fd);
-			/* Decrement file refs to have release() called. */
-			fput(enclave_file);
-			fput(enclave_file);
-			put_unused_fd(enclave_fd);
-
-			return -EFAULT;
-		}
-
 		return enclave_fd;
 	}
 
-- 
cgit v1.2.3


From 7942121b8ca073932529e7122a573ec2d1ed0d93 Mon Sep 17 00:00:00 2001
From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: Sun, 18 Apr 2021 01:52:05 +0200
Subject: rtc: imx-sc: remove .read_alarm

The RTC core properly handles RTC without .read_alarm and doesn't use it to
set alarms. .read_alarm can be safely dropped.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20210417235205.994119-1-alexandre.belloni@bootlin.com
---
 drivers/rtc/rtc-imx-sc.c | 11 -----------
 1 file changed, 11 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-imx-sc.c b/drivers/rtc/rtc-imx-sc.c
index cc9fbab49999..814d516645e2 100644
--- a/drivers/rtc/rtc-imx-sc.c
+++ b/drivers/rtc/rtc-imx-sc.c
@@ -80,16 +80,6 @@ static int imx_sc_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
 	return imx_scu_irq_group_enable(SC_IRQ_GROUP_RTC, SC_IRQ_RTC, enable);
 }
 
-static int imx_sc_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
-{
-	/*
-	 * SCU firmware does NOT provide read alarm API, but .read_alarm
-	 * callback is required by RTC framework to support alarm function,
-	 * so just return here.
-	 */
-	return 0;
-}
-
 static int imx_sc_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 {
 	struct imx_sc_msg_timer_rtc_set_alarm msg;
@@ -127,7 +117,6 @@ static int imx_sc_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 static const struct rtc_class_ops imx_sc_rtc_ops = {
 	.read_time = imx_sc_rtc_read_time,
 	.set_time = imx_sc_rtc_set_time,
-	.read_alarm = imx_sc_rtc_read_alarm,
 	.set_alarm = imx_sc_rtc_set_alarm,
 	.alarm_irq_enable = imx_sc_rtc_alarm_irq_enable,
 };
-- 
cgit v1.2.3


From 64e9d8e4dbc4e9173589ed8d61ea423466172396 Mon Sep 17 00:00:00 2001
From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: Sun, 18 Apr 2021 02:00:21 +0200
Subject: rtc: ds1307: replace HAS_ALARM by RTC_FEATURE_ALARM
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The core now has RTC_FEATURE_ALARM for the driver to indicate whether
alarms are available. Use that instead of HAS_ALARM to ensure the alarm
callbacks are not even called.

Tested-by: Łukasz Stelmach <l.stelmach@samsung.com>
Reviewed-by: Łukasz Stelmach <l.stelmach@samsung.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210418000023.995758-1-alexandre.belloni@bootlin.com
---
 drivers/rtc/rtc-ds1307.c | 42 +++++++-----------------------------------
 1 file changed, 7 insertions(+), 35 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index cd8e438bc9c4..76d67c419f7d 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -171,7 +171,6 @@ struct ds1307 {
 	enum ds_type		type;
 	unsigned long		flags;
 #define HAS_NVRAM	0		/* bit 0 == sysfs file active */
-#define HAS_ALARM	1		/* bit 1 == irq claimed */
 	struct device		*dev;
 	struct regmap		*regmap;
 	const char		*name;
@@ -411,9 +410,6 @@ static int ds1337_read_alarm(struct device *dev, struct rtc_wkalrm *t)
 	int			ret;
 	u8			regs[9];
 
-	if (!test_bit(HAS_ALARM, &ds1307->flags))
-		return -EINVAL;
-
 	/* read all ALARM1, ALARM2, and status registers at once */
 	ret = regmap_bulk_read(ds1307->regmap, DS1339_REG_ALARM1_SECS,
 			       regs, sizeof(regs));
@@ -454,9 +450,6 @@ static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t)
 	u8			control, status;
 	int			ret;
 
-	if (!test_bit(HAS_ALARM, &ds1307->flags))
-		return -EINVAL;
-
 	dev_dbg(dev, "%s secs=%d, mins=%d, "
 		"hours=%d, mday=%d, enabled=%d, pending=%d\n",
 		"alarm set", t->time.tm_sec, t->time.tm_min,
@@ -512,9 +505,6 @@ static int ds1307_alarm_irq_enable(struct device *dev, unsigned int enabled)
 {
 	struct ds1307		*ds1307 = dev_get_drvdata(dev);
 
-	if (!test_bit(HAS_ALARM, &ds1307->flags))
-		return -ENOTTY;
-
 	return regmap_update_bits(ds1307->regmap, DS1337_REG_CONTROL,
 				  DS1337_BIT_A1IE,
 				  enabled ? DS1337_BIT_A1IE : 0);
@@ -592,9 +582,6 @@ static int rx8130_read_alarm(struct device *dev, struct rtc_wkalrm *t)
 	u8 ald[3], ctl[3];
 	int ret;
 
-	if (!test_bit(HAS_ALARM, &ds1307->flags))
-		return -EINVAL;
-
 	/* Read alarm registers. */
 	ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_ALARM_MIN, ald,
 			       sizeof(ald));
@@ -634,9 +621,6 @@ static int rx8130_set_alarm(struct device *dev, struct rtc_wkalrm *t)
 	u8 ald[3], ctl[3];
 	int ret;
 
-	if (!test_bit(HAS_ALARM, &ds1307->flags))
-		return -EINVAL;
-
 	dev_dbg(dev, "%s, sec=%d min=%d hour=%d wday=%d mday=%d mon=%d "
 		"enabled=%d pending=%d\n", __func__,
 		t->time.tm_sec, t->time.tm_min, t->time.tm_hour,
@@ -681,9 +665,6 @@ static int rx8130_alarm_irq_enable(struct device *dev, unsigned int enabled)
 	struct ds1307 *ds1307 = dev_get_drvdata(dev);
 	int ret, reg;
 
-	if (!test_bit(HAS_ALARM, &ds1307->flags))
-		return -EINVAL;
-
 	ret = regmap_read(ds1307->regmap, RX8130_REG_CONTROL0, &reg);
 	if (ret < 0)
 		return ret;
@@ -735,9 +716,6 @@ static int mcp794xx_read_alarm(struct device *dev, struct rtc_wkalrm *t)
 	u8 regs[10];
 	int ret;
 
-	if (!test_bit(HAS_ALARM, &ds1307->flags))
-		return -EINVAL;
-
 	/* Read control and alarm 0 registers. */
 	ret = regmap_bulk_read(ds1307->regmap, MCP794XX_REG_CONTROL, regs,
 			       sizeof(regs));
@@ -793,9 +771,6 @@ static int mcp794xx_set_alarm(struct device *dev, struct rtc_wkalrm *t)
 	unsigned char regs[10];
 	int wday, ret;
 
-	if (!test_bit(HAS_ALARM, &ds1307->flags))
-		return -EINVAL;
-
 	wday = mcp794xx_alm_weekday(dev, &t->time);
 	if (wday < 0)
 		return wday;
@@ -842,9 +817,6 @@ static int mcp794xx_alarm_irq_enable(struct device *dev, unsigned int enabled)
 {
 	struct ds1307 *ds1307 = dev_get_drvdata(dev);
 
-	if (!test_bit(HAS_ALARM, &ds1307->flags))
-		return -EINVAL;
-
 	return regmap_update_bits(ds1307->regmap, MCP794XX_REG_CONTROL,
 				  MCP794XX_BIT_ALM0_EN,
 				  enabled ? MCP794XX_BIT_ALM0_EN : 0);
@@ -1641,7 +1613,7 @@ static int ds3231_clks_register(struct ds1307 *ds1307)
 		 * Interrupt signal due to alarm conditions and square-wave
 		 * output share same pin, so don't initialize both.
 		 */
-		if (i == DS3231_CLK_SQW && test_bit(HAS_ALARM, &ds1307->flags))
+		if (i == DS3231_CLK_SQW && test_bit(RTC_FEATURE_ALARM, ds1307->rtc->features))
 			continue;
 
 		init.name = ds3231_clks_names[i];
@@ -1964,15 +1936,15 @@ static int ds1307_probe(struct i2c_client *client,
 			     bin2bcd(tmp));
 	}
 
-	if (want_irq || ds1307_can_wakeup_device) {
-		device_set_wakeup_capable(ds1307->dev, true);
-		set_bit(HAS_ALARM, &ds1307->flags);
-	}
-
 	ds1307->rtc = devm_rtc_allocate_device(ds1307->dev);
 	if (IS_ERR(ds1307->rtc))
 		return PTR_ERR(ds1307->rtc);
 
+	if (want_irq || ds1307_can_wakeup_device)
+		device_set_wakeup_capable(ds1307->dev, true);
+	else
+		clear_bit(RTC_FEATURE_ALARM, ds1307->rtc->features);
+
 	if (ds1307_can_wakeup_device && !want_irq) {
 		dev_info(ds1307->dev,
 			 "'wakeup-source' is set, request for an IRQ is disabled!\n");
@@ -1988,7 +1960,7 @@ static int ds1307_probe(struct i2c_client *client,
 		if (err) {
 			client->irq = 0;
 			device_set_wakeup_capable(ds1307->dev, false);
-			clear_bit(HAS_ALARM, &ds1307->flags);
+			clear_bit(RTC_FEATURE_ALARM, ds1307->rtc->features);
 			dev_err(ds1307->dev, "unable to request IRQ!\n");
 		} else {
 			dev_dbg(ds1307->dev, "got IRQ %d\n", client->irq);
-- 
cgit v1.2.3


From 4bf84b449a0ea3885397bb5540a8fc68a78edb9d Mon Sep 17 00:00:00 2001
From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: Sun, 18 Apr 2021 02:00:22 +0200
Subject: rtc: ds1307: remove flags
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

flags is now unused, drop it.

Tested-by: Łukasz Stelmach <l.stelmach@samsung.com>
Reviewed-by: Łukasz Stelmach <l.stelmach@samsung.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210418000023.995758-2-alexandre.belloni@bootlin.com
---
 drivers/rtc/rtc-ds1307.c | 2 --
 1 file changed, 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 76d67c419f7d..089509d0a3a0 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -169,8 +169,6 @@ enum ds_type {
 
 struct ds1307 {
 	enum ds_type		type;
-	unsigned long		flags;
-#define HAS_NVRAM	0		/* bit 0 == sysfs file active */
 	struct device		*dev;
 	struct regmap		*regmap;
 	const char		*name;
-- 
cgit v1.2.3


From c55c3a516ceff3a041d5e3253d4d9a1b75fbb1d8 Mon Sep 17 00:00:00 2001
From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: Sun, 18 Apr 2021 02:00:23 +0200
Subject: rtc: rtc_update_irq_enable: rework UIE emulation
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Now that the core is aware of whether alarms are available, it is possible
to decide whether UIE emulation is required before actually trying to set
the alarm.

This greatly simplifies rtc_update_irq_enable because there is now only one
error value to track and is not relying on the return value of
__rtc_set_alarm anymore.

Tested-by: Łukasz Stelmach <l.stelmach@samsung.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210418000023.995758-3-alexandre.belloni@bootlin.com
---
 drivers/rtc/interface.c | 34 ++++++++++------------------------
 1 file changed, 10 insertions(+), 24 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index dcb34c73319e..9a2bd4947007 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -545,7 +545,7 @@ EXPORT_SYMBOL_GPL(rtc_alarm_irq_enable);
 
 int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled)
 {
-	int rc = 0, err;
+	int err;
 
 	err = mutex_lock_interruptible(&rtc->ops_lock);
 	if (err)
@@ -561,17 +561,21 @@ int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled)
 	if (rtc->uie_rtctimer.enabled == enabled)
 		goto out;
 
-	if (rtc->uie_unsupported) {
-		err = -EINVAL;
-		goto out;
+	if (rtc->uie_unsupported || !test_bit(RTC_FEATURE_ALARM, rtc->features)) {
+		mutex_unlock(&rtc->ops_lock);
+#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
+		return rtc_dev_update_irq_enable_emul(rtc, enabled);
+#else
+		return -EINVAL;
+#endif
 	}
 
 	if (enabled) {
 		struct rtc_time tm;
 		ktime_t now, onesec;
 
-		rc = __rtc_read_time(rtc, &tm);
-		if (rc)
+		err = __rtc_read_time(rtc, &tm);
+		if (err)
 			goto out;
 		onesec = ktime_set(1, 0);
 		now = rtc_tm_to_ktime(tm);
@@ -585,24 +589,6 @@ int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled)
 out:
 	mutex_unlock(&rtc->ops_lock);
 
-	/*
-	 * __rtc_read_time() failed, this probably means that the RTC time has
-	 * never been set or less probably there is a transient error on the
-	 * bus. In any case, avoid enabling emulation has this will fail when
-	 * reading the time too.
-	 */
-	if (rc)
-		return rc;
-
-#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
-	/*
-	 * Enable emulation if the driver returned -EINVAL to signal that it has
-	 * been configured without interrupts or they are not available at the
-	 * moment.
-	 */
-	if (err == -EINVAL)
-		err = rtc_dev_update_irq_enable_emul(rtc, enabled);
-#endif
 	return err;
 }
 EXPORT_SYMBOL_GPL(rtc_update_irq_enable);
-- 
cgit v1.2.3


From 94959a3a04a574b6234df8ff165bf70135b0bb2b Mon Sep 17 00:00:00 2001
From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: Sun, 18 Apr 2021 02:20:21 +0200
Subject: rtc: pcf8523: remove useless define

Drop DRIVER_NAME as it is only used once

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210418002023.1000265-1-alexandre.belloni@bootlin.com
---
 drivers/rtc/rtc-pcf8523.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-pcf8523.c b/drivers/rtc/rtc-pcf8523.c
index 5e1e7b2a8c9a..fe3ab41d8326 100644
--- a/drivers/rtc/rtc-pcf8523.c
+++ b/drivers/rtc/rtc-pcf8523.c
@@ -9,8 +9,6 @@
 #include <linux/rtc.h>
 #include <linux/of.h>
 
-#define DRIVER_NAME "rtc-pcf8523"
-
 #define REG_CONTROL1 0x00
 #define REG_CONTROL1_CAP_SEL BIT(7)
 #define REG_CONTROL1_STOP    BIT(5)
@@ -373,7 +371,7 @@ MODULE_DEVICE_TABLE(of, pcf8523_of_match);
 
 static struct i2c_driver pcf8523_driver = {
 	.driver = {
-		.name = DRIVER_NAME,
+		.name = "rtc-pcf8523",
 		.of_match_table = of_match_ptr(pcf8523_of_match),
 	},
 	.probe = pcf8523_probe,
-- 
cgit v1.2.3


From 13e37b7fb75dfaeb4f5a72468f0bd32853628d28 Mon Sep 17 00:00:00 2001
From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: Sun, 18 Apr 2021 02:20:22 +0200
Subject: rtc: pcf8523: add alarm support

Alarm support requires unconditionally disabling clock out because it is
using the int1 pin.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210418002023.1000265-2-alexandre.belloni@bootlin.com
---
 drivers/rtc/rtc-pcf8523.c | 179 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 179 insertions(+)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-pcf8523.c b/drivers/rtc/rtc-pcf8523.c
index fe3ab41d8326..4e5e5caeb8ce 100644
--- a/drivers/rtc/rtc-pcf8523.c
+++ b/drivers/rtc/rtc-pcf8523.c
@@ -8,10 +8,15 @@
 #include <linux/module.h>
 #include <linux/rtc.h>
 #include <linux/of.h>
+#include <linux/pm_wakeirq.h>
 
 #define REG_CONTROL1 0x00
 #define REG_CONTROL1_CAP_SEL BIT(7)
 #define REG_CONTROL1_STOP    BIT(5)
+#define REG_CONTROL1_AIE    BIT(1)
+
+#define REG_CONTROL2 0x01
+#define REG_CONTROL2_AF BIT(3)
 
 #define REG_CONTROL3 0x02
 #define REG_CONTROL3_PM_BLD BIT(7) /* battery low detection disabled */
@@ -30,9 +35,22 @@
 #define REG_MONTHS   0x08
 #define REG_YEARS    0x09
 
+#define REG_MINUTE_ALARM	0x0a
+#define REG_HOUR_ALARM		0x0b
+#define REG_DAY_ALARM		0x0c
+#define REG_WEEKDAY_ALARM	0x0d
+#define ALARM_DIS BIT(7)
+
 #define REG_OFFSET   0x0e
 #define REG_OFFSET_MODE BIT(7)
 
+#define REG_TMR_CLKOUT_CTRL 0x0f
+
+struct pcf8523 {
+	struct rtc_device *rtc;
+	struct i2c_client *client;
+};
+
 static int pcf8523_read(struct i2c_client *client, u8 reg, u8 *valuep)
 {
 	struct i2c_msg msgs[2];
@@ -138,6 +156,27 @@ static int pcf8523_set_pm(struct i2c_client *client, u8 pm)
 	return 0;
 }
 
+static irqreturn_t pcf8523_irq(int irq, void *dev_id)
+{
+	struct pcf8523 *pcf8523 = i2c_get_clientdata(dev_id);
+	u8 value;
+	int err;
+
+	err = pcf8523_read(pcf8523->client, REG_CONTROL2, &value);
+	if (err < 0)
+		return IRQ_HANDLED;
+
+	if (value & REG_CONTROL2_AF) {
+		value &= ~REG_CONTROL2_AF;
+		pcf8523_write(pcf8523->client, REG_CONTROL2, value);
+		rtc_update_irq(pcf8523->rtc, 1, RTC_IRQF | RTC_AF);
+
+		return IRQ_HANDLED;
+	}
+
+	return IRQ_NONE;
+}
+
 static int pcf8523_stop_rtc(struct i2c_client *client)
 {
 	u8 value;
@@ -257,6 +296,111 @@ static int pcf8523_rtc_set_time(struct device *dev, struct rtc_time *tm)
 	return pcf8523_start_rtc(client);
 }
 
+static int pcf8523_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *tm)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	u8 start = REG_MINUTE_ALARM, regs[4];
+	struct i2c_msg msgs[2];
+	u8 value;
+	int err;
+
+	msgs[0].addr = client->addr;
+	msgs[0].flags = 0;
+	msgs[0].len = 1;
+	msgs[0].buf = &start;
+
+	msgs[1].addr = client->addr;
+	msgs[1].flags = I2C_M_RD;
+	msgs[1].len = sizeof(regs);
+	msgs[1].buf = regs;
+
+	err = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+	if (err < 0)
+		return err;
+
+	tm->time.tm_sec = 0;
+	tm->time.tm_min = bcd2bin(regs[0] & 0x7F);
+	tm->time.tm_hour = bcd2bin(regs[1] & 0x3F);
+	tm->time.tm_mday = bcd2bin(regs[2] & 0x3F);
+	tm->time.tm_wday = bcd2bin(regs[3] & 0x7);
+
+	err = pcf8523_read(client, REG_CONTROL1, &value);
+	if (err < 0)
+		return err;
+	tm->enabled = !!(value & REG_CONTROL1_AIE);
+
+	err = pcf8523_read(client, REG_CONTROL2, &value);
+	if (err < 0)
+		return err;
+	tm->pending = !!(value & REG_CONTROL2_AF);
+
+	return 0;
+}
+
+static int pcf8523_irq_enable(struct device *dev, unsigned int enabled)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	u8 value;
+	int err;
+
+	err = pcf8523_read(client, REG_CONTROL1, &value);
+	if (err < 0)
+		return err;
+
+	value &= REG_CONTROL1_AIE;
+
+	if (enabled)
+		value |= REG_CONTROL1_AIE;
+
+	err = pcf8523_write(client, REG_CONTROL1, value);
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
+static int pcf8523_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *tm)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct i2c_msg msg;
+	u8 regs[5];
+	int err;
+
+	err = pcf8523_irq_enable(dev, 0);
+	if (err)
+		return err;
+
+	err = pcf8523_write(client, REG_CONTROL2, 0);
+	if (err < 0)
+		return err;
+
+	/* The alarm has no seconds, round up to nearest minute */
+	if (tm->time.tm_sec) {
+		time64_t alarm_time = rtc_tm_to_time64(&tm->time);
+
+		alarm_time += 60 - tm->time.tm_sec;
+		rtc_time64_to_tm(alarm_time, &tm->time);
+	}
+
+	regs[0] = REG_MINUTE_ALARM;
+	regs[1] = bin2bcd(tm->time.tm_min);
+	regs[2] = bin2bcd(tm->time.tm_hour);
+	regs[3] = bin2bcd(tm->time.tm_mday);
+	regs[4] = ALARM_DIS;
+	msg.addr = client->addr;
+	msg.flags = 0;
+	msg.len = sizeof(regs);
+	msg.buf = regs;
+	err = i2c_transfer(client->adapter, &msg, 1);
+	if (err < 0)
+		return err;
+
+	if (tm->enabled)
+		return pcf8523_irq_enable(dev, tm->enabled);
+
+	return 0;
+}
+
 #ifdef CONFIG_RTC_INTF_DEV
 static int pcf8523_rtc_ioctl(struct device *dev, unsigned int cmd,
 			     unsigned long arg)
@@ -320,6 +464,9 @@ static int pcf8523_rtc_set_offset(struct device *dev, long offset)
 static const struct rtc_class_ops pcf8523_rtc_ops = {
 	.read_time = pcf8523_rtc_read_time,
 	.set_time = pcf8523_rtc_set_time,
+	.read_alarm = pcf8523_rtc_read_alarm,
+	.set_alarm = pcf8523_rtc_set_alarm,
+	.alarm_irq_enable = pcf8523_irq_enable,
 	.ioctl = pcf8523_rtc_ioctl,
 	.read_offset = pcf8523_rtc_read_offset,
 	.set_offset = pcf8523_rtc_set_offset,
@@ -328,12 +475,21 @@ static const struct rtc_class_ops pcf8523_rtc_ops = {
 static int pcf8523_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
 {
+	struct pcf8523 *pcf8523;
 	struct rtc_device *rtc;
+	bool wakeup_source = false;
 	int err;
 
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
 		return -ENODEV;
 
+	pcf8523 = devm_kzalloc(&client->dev, sizeof(struct pcf8523), GFP_KERNEL);
+	if (!pcf8523)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, pcf8523);
+	pcf8523->client = client;
+
 	err = pcf8523_load_capacitance(client);
 	if (err < 0)
 		dev_warn(&client->dev, "failed to set xtal load capacitance: %d",
@@ -347,9 +503,32 @@ static int pcf8523_probe(struct i2c_client *client,
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 
+	pcf8523->rtc = rtc;
 	rtc->ops = &pcf8523_rtc_ops;
 	rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
 	rtc->range_max = RTC_TIMESTAMP_END_2099;
+	rtc->uie_unsupported = 1;
+
+	if (client->irq > 0) {
+		err = pcf8523_write(client, REG_TMR_CLKOUT_CTRL, 0x38);
+		if (err < 0)
+			return err;
+
+		err = devm_request_threaded_irq(&client->dev, client->irq,
+						NULL, pcf8523_irq,
+						IRQF_SHARED | IRQF_ONESHOT | IRQF_TRIGGER_LOW,
+						dev_name(&rtc->dev), client);
+		if (err)
+			return err;
+
+		dev_pm_set_wake_irq(&client->dev, client->irq);
+	}
+
+#ifdef CONFIG_OF
+	wakeup_source = of_property_read_bool(client->dev.of_node, "wakeup-source");
+#endif
+	if (client->irq > 0 || wakeup_source)
+		device_init_wakeup(&client->dev, true);
 
 	return devm_rtc_register_device(rtc);
 }
-- 
cgit v1.2.3


From a1cfe7cc3873baf83a26356cb5e10409c6fb942c Mon Sep 17 00:00:00 2001
From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: Sun, 18 Apr 2021 02:20:23 +0200
Subject: rtc: pcf8523: report oscillator failures

Report oscillator failures and invalid date/time on RTC_VL_READ.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210418002023.1000265-3-alexandre.belloni@bootlin.com
---
 drivers/rtc/rtc-pcf8523.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-pcf8523.c b/drivers/rtc/rtc-pcf8523.c
index 4e5e5caeb8ce..740e2136ca98 100644
--- a/drivers/rtc/rtc-pcf8523.c
+++ b/drivers/rtc/rtc-pcf8523.c
@@ -406,6 +406,8 @@ static int pcf8523_rtc_ioctl(struct device *dev, unsigned int cmd,
 			     unsigned long arg)
 {
 	struct i2c_client *client = to_i2c_client(dev);
+	unsigned int flags = 0;
+	u8 value;
 	int ret;
 
 	switch (cmd) {
@@ -414,9 +416,16 @@ static int pcf8523_rtc_ioctl(struct device *dev, unsigned int cmd,
 		if (ret < 0)
 			return ret;
 		if (ret)
-			ret = RTC_VL_BACKUP_LOW;
+			flags |= RTC_VL_BACKUP_LOW;
+
+		ret = pcf8523_read(client, REG_SECONDS, &value);
+		if (ret < 0)
+			return ret;
+
+		if (value & REG_SECONDS_OS)
+			flags |= RTC_VL_DATA_INVALID;
 
-		return put_user(ret, (unsigned int __user *)arg);
+		return put_user(flags, (unsigned int __user *)arg);
 
 	default:
 		return -ENOIOCTLCMD;
-- 
cgit v1.2.3


From 204756f016726a380bafe619438ed979088bd04a Mon Sep 17 00:00:00 2001
From: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
Date: Tue, 20 Apr 2021 11:39:17 +0900
Subject: rtc: ds1307: Fix wday settings for rx8130

rx8130 wday specifies the bit position, not BCD.

Fixes: ee0981be7704 ("rtc: ds1307: Add support for Epson RX8130CE")
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210420023917.1949066-1-nobuhiro1.iwamatsu@toshiba.co.jp
---
 drivers/rtc/rtc-ds1307.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 089509d0a3a0..336cb9aa5e33 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -293,7 +293,11 @@ static int ds1307_get_time(struct device *dev, struct rtc_time *t)
 	t->tm_min = bcd2bin(regs[DS1307_REG_MIN] & 0x7f);
 	tmp = regs[DS1307_REG_HOUR] & 0x3f;
 	t->tm_hour = bcd2bin(tmp);
-	t->tm_wday = bcd2bin(regs[DS1307_REG_WDAY] & 0x07) - 1;
+	/* rx8130 is bit position, not BCD */
+	if (ds1307->type == rx_8130)
+		t->tm_wday = fls(regs[DS1307_REG_WDAY] & 0x7f);
+	else
+		t->tm_wday = bcd2bin(regs[DS1307_REG_WDAY] & 0x07) - 1;
 	t->tm_mday = bcd2bin(regs[DS1307_REG_MDAY] & 0x3f);
 	tmp = regs[DS1307_REG_MONTH] & 0x1f;
 	t->tm_mon = bcd2bin(tmp) - 1;
@@ -340,7 +344,11 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
 	regs[DS1307_REG_SECS] = bin2bcd(t->tm_sec);
 	regs[DS1307_REG_MIN] = bin2bcd(t->tm_min);
 	regs[DS1307_REG_HOUR] = bin2bcd(t->tm_hour);
-	regs[DS1307_REG_WDAY] = bin2bcd(t->tm_wday + 1);
+	/* rx8130 is bit position, not BCD */
+	if (ds1307->type == rx_8130)
+		regs[DS1307_REG_WDAY] = 1 << t->tm_wday;
+	else
+		regs[DS1307_REG_WDAY] = bin2bcd(t->tm_wday + 1);
 	regs[DS1307_REG_MDAY] = bin2bcd(t->tm_mday);
 	regs[DS1307_REG_MONTH] = bin2bcd(t->tm_mon + 1);
 
-- 
cgit v1.2.3


From fefbec3a741831bc7791a94a483ad55665160b50 Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Date: Tue, 20 Apr 2021 19:02:42 +0200
Subject: rtc: s5m: Remove reference to parent's device pdata

The S5M RTC driver does not use parent's device (sec-core PMIC driver)
platform data so there is no need to check for it.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210420170244.13467-3-krzysztof.kozlowski@canonical.com
---
 drivers/rtc/rtc-s5m.c | 6 ------
 1 file changed, 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c
index 80b66f16db89..038269a6b08c 100644
--- a/drivers/rtc/rtc-s5m.c
+++ b/drivers/rtc/rtc-s5m.c
@@ -713,16 +713,10 @@ static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info)
 static int s5m_rtc_probe(struct platform_device *pdev)
 {
 	struct sec_pmic_dev *s5m87xx = dev_get_drvdata(pdev->dev.parent);
-	struct sec_platform_data *pdata = s5m87xx->pdata;
 	struct s5m_rtc_info *info;
 	const struct regmap_config *regmap_cfg;
 	int ret, alarm_irq;
 
-	if (!pdata) {
-		dev_err(pdev->dev.parent, "Platform data not supplied\n");
-		return -ENODEV;
-	}
-
 	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
 	if (!info)
 		return -ENOMEM;
-- 
cgit v1.2.3


From e463786f380ab28f1ca6e34ea65bbc2e03b2d325 Mon Sep 17 00:00:00 2001
From: Dario Binacchi <dariobin@libero.it>
Date: Sun, 25 Apr 2021 16:59:23 +0200
Subject: rtc: omap: use rtc_write to access OMAP_RTC_OSC_REG

The RTC_OSC_REG register is 32-bit, but the useful information is found
in the 7 least significant bits (bits 7-31 are reserved). And in fact,
as you can see from the code, all read accesses are 8-bit, as well as
some writes. Let's make sure all writes are 8-bit. Moreover, in contexts
where consecutive reads / writes after the busy check must take place
within 15 us, it is better not to waste time on useless accesses.

Signed-off-by: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210425145924.23353-1-dariobin@libero.it
---
 drivers/rtc/rtc-omap.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index dc7db2477f88..d46e0f0cc502 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -786,8 +786,7 @@ static int omap_rtc_probe(struct platform_device *pdev)
 	/* enable RTC functional clock */
 	if (rtc->type->has_32kclk_en) {
 		reg = rtc_read(rtc, OMAP_RTC_OSC_REG);
-		rtc_writel(rtc, OMAP_RTC_OSC_REG,
-				reg | OMAP_RTC_OSC_32KCLK_EN);
+		rtc_write(rtc, OMAP_RTC_OSC_REG, reg | OMAP_RTC_OSC_32KCLK_EN);
 	}
 
 	/* clear old status */
@@ -845,7 +844,7 @@ static int omap_rtc_probe(struct platform_device *pdev)
 		reg = rtc_read(rtc, OMAP_RTC_OSC_REG);
 		reg &= ~OMAP_RTC_OSC_OSC32K_GZ_DISABLE;
 		reg |= OMAP_RTC_OSC_32KCLK_EN | OMAP_RTC_OSC_SEL_32KCLK_SRC;
-		rtc_writel(rtc, OMAP_RTC_OSC_REG, reg);
+		rtc_write(rtc, OMAP_RTC_OSC_REG, reg);
 	}
 
 	rtc->type->lock(rtc);
-- 
cgit v1.2.3


From 4d0185e67806a233c423c1668e87e137fbda192c Mon Sep 17 00:00:00 2001
From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: Thu, 29 Apr 2021 23:44:03 +0200
Subject: rtc: sysfs: check features instead of ops

Test RTC_FEATURE_ALARM instead of relying on .set_alarm to know whether
alarms are available.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210429214403.2610952-1-alexandre.belloni@bootlin.com
---
 drivers/rtc/sysfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/rtc/sysfs.c b/drivers/rtc/sysfs.c
index 8a957d31a1a4..74026f67fdfb 100644
--- a/drivers/rtc/sysfs.c
+++ b/drivers/rtc/sysfs.c
@@ -273,7 +273,7 @@ static bool rtc_does_wakealarm(struct rtc_device *rtc)
 	if (!device_can_wakeup(rtc->dev.parent))
 		return false;
 
-	return rtc->ops->set_alarm != NULL;
+	return !!test_bit(RTC_FEATURE_ALARM, rtc->features);
 }
 
 static umode_t rtc_attr_is_visible(struct kobject *kobj,
-- 
cgit v1.2.3


From 5db91e9cb5b3f645a9540d2ab67a19e464d89754 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Fri, 30 Apr 2021 15:32:22 +0200
Subject: Revert "ACPI: scan: Turn off unused power resources during
 initialization"

Revert commit 4b9ee772eaa8 ("ACPI: scan: Turn off unused power
resources during initialization") that is reported to cause
initialization issues to occur.

Reported-by: Shujun Wang <wsj20369@163.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/internal.h | 1 -
 drivers/acpi/power.c    | 2 +-
 drivers/acpi/scan.c     | 2 --
 drivers/acpi/sleep.h    | 1 +
 4 files changed, 2 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 9fcefcdc1dbe..e6a5d997241c 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -139,7 +139,6 @@ int acpi_device_sleep_wake(struct acpi_device *dev,
 int acpi_power_get_inferred_state(struct acpi_device *device, int *state);
 int acpi_power_on_resources(struct acpi_device *device, int state);
 int acpi_power_transition(struct acpi_device *device, int state);
-void acpi_turn_off_unused_power_resources(void);
 
 /* --------------------------------------------------------------------------
                               Device Power Management
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index bacae6d178ff..7e69931be828 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -996,7 +996,6 @@ void acpi_resume_power_resources(void)
 
 	mutex_unlock(&power_resource_list_lock);
 }
-#endif
 
 void acpi_turn_off_unused_power_resources(void)
 {
@@ -1017,3 +1016,4 @@ void acpi_turn_off_unused_power_resources(void)
 
 	mutex_unlock(&power_resource_list_lock);
 }
+#endif
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 1584c9e463bd..a184529d8fa4 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -2360,8 +2360,6 @@ int __init acpi_scan_init(void)
 		}
 	}
 
-	acpi_turn_off_unused_power_resources();
-
 	acpi_scan_initialized = true;
 
  out:
diff --git a/drivers/acpi/sleep.h b/drivers/acpi/sleep.h
index 7fe41ee489d6..1856f76ac83f 100644
--- a/drivers/acpi/sleep.h
+++ b/drivers/acpi/sleep.h
@@ -8,6 +8,7 @@ extern struct list_head acpi_wakeup_device_list;
 extern struct mutex acpi_device_lock;
 
 extern void acpi_resume_power_resources(void);
+extern void acpi_turn_off_unused_power_resources(void);
 
 static inline acpi_status acpi_set_waking_vector(u32 wakeup_address)
 {
-- 
cgit v1.2.3


From a7f82c3641245055412b2b4f859ae55fd29fdffe Mon Sep 17 00:00:00 2001
From: Niklas Schnelle <schnelle@linux.ibm.com>
Date: Fri, 9 Apr 2021 14:08:50 +0200
Subject: s390/pci: rename zpci_configure_device()

With zpci_configure_device() now always called on a device that has
already been configured on the platform level its name has become
misleading. Rename it to zpci_scan_configured_device() to signify that
the function now only handles the correct scanning of a newly configured
PCI function taking care of the special handling necessary for function
0 and functions parked waiting for a PCI bus that can't be created
without first seeing function 0.

Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 arch/s390/include/asm/pci.h        |  2 +-
 arch/s390/pci/pci.c                | 10 ++++++----
 arch/s390/pci/pci_event.c          |  2 +-
 drivers/pci/hotplug/s390_pci_hpc.c |  2 +-
 4 files changed, 9 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index 35c2af9371a9..10b67f8aab99 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -204,7 +204,7 @@ extern unsigned int s390_pci_no_rid;
 struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state);
 int zpci_enable_device(struct zpci_dev *);
 int zpci_disable_device(struct zpci_dev *);
-int zpci_configure_device(struct zpci_dev *zdev, u32 fh);
+int zpci_scan_configured_device(struct zpci_dev *zdev, u32 fh);
 int zpci_deconfigure_device(struct zpci_dev *zdev);
 
 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index c01b6dbac7cf..b0993e05affe 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -738,17 +738,19 @@ error:
 }
 
 /**
- * zpci_configure_device() - Configure a zpci_dev
+ * zpci_scan_configured_device() - Scan a freshly configured zpci_dev
  * @zdev: The zpci_dev to be configured
  * @fh: The general function handle supplied by the platform
  *
  * Given a device in the configuration state Configured, enables, scans and
- * adds it to the common code PCI subsystem. If any failure occurs, the
- * zpci_dev is left disabled.
+ * adds it to the common code PCI subsystem if possible. If the PCI device is
+ * parked because we can not yet create a PCI bus because we have not seen
+ * function 0, it is ignored but will be scanned once function 0 appears.
+ * If any failure occurs, the zpci_dev is left disabled.
  *
  * Return: 0 on success, or an error code otherwise
  */
-int zpci_configure_device(struct zpci_dev *zdev, u32 fh)
+int zpci_scan_configured_device(struct zpci_dev *zdev, u32 fh)
 {
 	int rc;
 
diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c
index 1178b48a66df..8ecc256d27a5 100644
--- a/arch/s390/pci/pci_event.c
+++ b/arch/s390/pci/pci_event.c
@@ -113,7 +113,7 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
 				break;
 			zdev->state = ZPCI_FN_STATE_CONFIGURED;
 		}
-		zpci_configure_device(zdev, ccdf->fh);
+		zpci_scan_configured_device(zdev, ccdf->fh);
 		break;
 	case 0x0302: /* Reserved -> Standby */
 		if (!zdev)
diff --git a/drivers/pci/hotplug/s390_pci_hpc.c b/drivers/pci/hotplug/s390_pci_hpc.c
index f8f056be71b7..014868752cd4 100644
--- a/drivers/pci/hotplug/s390_pci_hpc.c
+++ b/drivers/pci/hotplug/s390_pci_hpc.c
@@ -35,7 +35,7 @@ static int enable_slot(struct hotplug_slot *hotplug_slot)
 		return rc;
 	zdev->state = ZPCI_FN_STATE_CONFIGURED;
 
-	return zpci_configure_device(zdev, zdev->fh);
+	return zpci_scan_configured_device(zdev, zdev->fh);
 }
 
 static int disable_slot(struct hotplug_slot *hotplug_slot)
-- 
cgit v1.2.3


From 2f7484fd73729f89085fe08d683f5a8d9e17fe99 Mon Sep 17 00:00:00 2001
From: Vineeth Vijayan <vneethv@linux.ibm.com>
Date: Fri, 23 Apr 2021 12:08:43 +0200
Subject: s390/cio: remove invalid condition on IO_SCH_UNREG

The condition to check the cdev pointer validity on
css_sch_device_unregister() is a leftover from the 'commit 8cc0dcfdc1c0
("s390/cio: remove pm support from ccw bus driver")'. This could lead to a
situation, where detaching the device is not happening completely. Remove
this invalid condition in the IO_SCH_UNREG case.

Link: https://lore.kernel.org/r/20210423100843.2230969-1-vneethv@linux.ibm.com
Fixes: 8cc0dcfdc1c0 ("s390/cio: remove pm support from ccw bus driver")
Reported-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Suggested-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Tested-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Tested-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 drivers/s390/cio/device.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 3f026021e95e..84f659cafe76 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -1532,8 +1532,7 @@ static int io_subchannel_sch_event(struct subchannel *sch, int process)
 	switch (action) {
 	case IO_SCH_ORPH_UNREG:
 	case IO_SCH_UNREG:
-		if (!cdev)
-			css_sch_device_unregister(sch);
+		css_sch_device_unregister(sch);
 		break;
 	case IO_SCH_ORPH_ATTACH:
 	case IO_SCH_UNREG_ATTACH:
-- 
cgit v1.2.3


From 384d0c68204a4a657f4bbc096c50d729ae7d9ef0 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Fri, 12 Feb 2021 11:02:47 +0100
Subject: PCI/VPD: Remove pci_set_vpd_size()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

24a1720a0841 ("cxgb4: collect serial config version from register") removed
the only usage of pci_set_vpd_size(). If a device needs to override the
auto-detected VPD size, then this can be done with a PCI quirk, as is done
for Chelsio devices. There's no need to allow drivers to change the VPD
size.

Remove pci_set_vpd_size().

[bhelgaas: squash in Arnd's fix for "'pci_vpd_set_size' defined but not
used" from
https://lore.kernel.org/r/20210421140334.3847155-1-arnd@kernel.org]
Link: https://lore.kernel.org/r/47d86e52-9bcf-7da7-1edb-0d988a7a82ab@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
---
 drivers/pci/vpd.c   | 58 ++++++++++++-----------------------------------------
 include/linux/pci.h |  1 -
 2 files changed, 13 insertions(+), 46 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index ab81c7a5185f..a1d31c5d1864 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -16,7 +16,6 @@
 struct pci_vpd_ops {
 	ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
 	ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
-	int (*set_size)(struct pci_dev *dev, size_t len);
 };
 
 struct pci_vpd {
@@ -60,19 +59,6 @@ ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void
 }
 EXPORT_SYMBOL(pci_write_vpd);
 
-/**
- * pci_set_vpd_size - Set size of Vital Product Data space
- * @dev:	pci device struct
- * @len:	size of vpd space
- */
-int pci_set_vpd_size(struct pci_dev *dev, size_t len)
-{
-	if (!dev->vpd || !dev->vpd->ops)
-		return -ENODEV;
-	return dev->vpd->ops->set_size(dev, len);
-}
-EXPORT_SYMBOL(pci_set_vpd_size);
-
 #define PCI_VPD_MAX_SIZE (PCI_VPD_ADDR_MASK + 1)
 
 /**
@@ -297,23 +283,9 @@ out:
 	return ret ? ret : count;
 }
 
-static int pci_vpd_set_size(struct pci_dev *dev, size_t len)
-{
-	struct pci_vpd *vpd = dev->vpd;
-
-	if (len == 0 || len > PCI_VPD_MAX_SIZE)
-		return -EIO;
-
-	vpd->valid = 1;
-	vpd->len = len;
-
-	return 0;
-}
-
 static const struct pci_vpd_ops pci_vpd_ops = {
 	.read = pci_vpd_read,
 	.write = pci_vpd_write,
-	.set_size = pci_vpd_set_size,
 };
 
 static ssize_t pci_vpd_f0_read(struct pci_dev *dev, loff_t pos, size_t count,
@@ -346,24 +318,9 @@ static ssize_t pci_vpd_f0_write(struct pci_dev *dev, loff_t pos, size_t count,
 	return ret;
 }
 
-static int pci_vpd_f0_set_size(struct pci_dev *dev, size_t len)
-{
-	struct pci_dev *tdev = pci_get_slot(dev->bus,
-					    PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
-	int ret;
-
-	if (!tdev)
-		return -ENODEV;
-
-	ret = pci_set_vpd_size(tdev, len);
-	pci_dev_put(tdev);
-	return ret;
-}
-
 static const struct pci_vpd_ops pci_vpd_f0_ops = {
 	.read = pci_vpd_f0_read,
 	.write = pci_vpd_f0_write,
-	.set_size = pci_vpd_f0_set_size,
 };
 
 int pci_vpd_init(struct pci_dev *dev)
@@ -564,6 +521,17 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_QLOGIC, 0x2261, quirk_blacklist_vpd);
 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS, 0x0031,
 			      PCI_CLASS_BRIDGE_PCI, 8, quirk_blacklist_vpd);
 
+static void pci_vpd_set_size(struct pci_dev *dev, size_t len)
+{
+	struct pci_vpd *vpd = dev->vpd;
+
+	if (!vpd || len == 0 || len > PCI_VPD_MAX_SIZE)
+		return;
+
+	vpd->valid = 1;
+	vpd->len = len;
+}
+
 static void quirk_chelsio_extend_vpd(struct pci_dev *dev)
 {
 	int chip = (dev->device & 0xf000) >> 12;
@@ -582,9 +550,9 @@ static void quirk_chelsio_extend_vpd(struct pci_dev *dev)
 	 * limits.
 	 */
 	if (chip == 0x0 && prod >= 0x20)
-		pci_set_vpd_size(dev, 8192);
+		pci_vpd_set_size(dev, 8192);
 	else if (chip >= 0x4 && func < 0x8)
-		pci_set_vpd_size(dev, 2048);
+		pci_vpd_set_size(dev, 2048);
 }
 
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, PCI_ANY_ID,
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 86c799c97b77..edadc62ae058 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1302,7 +1302,6 @@ void pci_unlock_rescan_remove(void);
 /* Vital Product Data routines */
 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
-int pci_set_vpd_size(struct pci_dev *dev, size_t len);
 
 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
-- 
cgit v1.2.3


From d1df5f3f4cfff88c989cbeec6ca0e02340494818 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Thu, 1 Apr 2021 14:03:49 +0200
Subject: PCI/VPD: Make missing VPD message less alarming

Realtek RTL8169/8168/8125 NIC families indicate VPD capability and an
optional VPD EEPROM can be connected via I2C/SPI. However I haven't seen
any card or system with such a VPD EEPROM yet. The missing EEPROM causes
the following warning whenever e.g. lscpi -vv is executed.

  invalid short VPD tag 00 at offset 01

The warning confuses users, and I think we should handle the situation more
gently. Therefore, if first VPD byte is read as 0x00, assume a missing
optional VPD PROM and replace the warning with a more descriptive message
at info level.

[bhelgaas: fix pre-existing whitespace]
Link: https://lore.kernel.org/r/ccbc11f1-4dbb-e2c8-d0ea-559e06d4c340@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/vpd.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index a1d31c5d1864..cbf784ed5216 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -71,10 +71,14 @@ static size_t pci_vpd_size(struct pci_dev *dev, size_t old_size)
 	size_t off = 0;
 	unsigned char header[1+2];	/* 1 byte tag, 2 bytes length */
 
-	while (off < old_size &&
-	       pci_read_vpd(dev, off, 1, header) == 1) {
+	while (off < old_size && pci_read_vpd(dev, off, 1, header) == 1) {
 		unsigned char tag;
 
+		if (!header[0] && !off) {
+			pci_info(dev, "Invalid VPD tag 00, assume missing optional VPD EPROM\n");
+			return 0;
+		}
+
 		if (header[0] & PCI_VPD_LRDT) {
 			/* Large Resource Data Type Tag */
 			tag = pci_vpd_lrdt_tag(header);
-- 
cgit v1.2.3


From e947e7b1163d5a4375dc1ca6134ebda67ee7d33a Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Thu, 1 Apr 2021 18:37:47 +0200
Subject: PCI/VPD: Change pci_vpd_init() return type to void

pci_init_capabilities() is the only caller and doesn't use the return
value. So let's change the return type to void.

Link: https://lore.kernel.org/r/663ec440-8375-1459-ddb4-98ea76e75917@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci.h | 2 +-
 drivers/pci/vpd.c | 7 +++----
 2 files changed, 4 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index ef7c4661314f..37d21aa0b0d5 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -141,7 +141,7 @@ static inline bool pcie_downstream_port(const struct pci_dev *dev)
 	       type == PCI_EXP_TYPE_PCIE_BRIDGE;
 }
 
-int pci_vpd_init(struct pci_dev *dev);
+void pci_vpd_init(struct pci_dev *dev);
 void pci_vpd_release(struct pci_dev *dev);
 void pcie_vpd_create_sysfs_dev_files(struct pci_dev *dev);
 void pcie_vpd_remove_sysfs_dev_files(struct pci_dev *dev);
diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index cbf784ed5216..c1c4f7d80a04 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -327,18 +327,18 @@ static const struct pci_vpd_ops pci_vpd_f0_ops = {
 	.write = pci_vpd_f0_write,
 };
 
-int pci_vpd_init(struct pci_dev *dev)
+void pci_vpd_init(struct pci_dev *dev)
 {
 	struct pci_vpd *vpd;
 	u8 cap;
 
 	cap = pci_find_capability(dev, PCI_CAP_ID_VPD);
 	if (!cap)
-		return -ENODEV;
+		return;
 
 	vpd = kzalloc(sizeof(*vpd), GFP_ATOMIC);
 	if (!vpd)
-		return -ENOMEM;
+		return;
 
 	vpd->len = PCI_VPD_MAX_SIZE;
 	if (dev->dev_flags & PCI_DEV_FLAGS_VPD_REF_F0)
@@ -350,7 +350,6 @@ int pci_vpd_init(struct pci_dev *dev)
 	vpd->busy = 0;
 	vpd->valid = 0;
 	dev->vpd = vpd;
-	return 0;
 }
 
 void pci_vpd_release(struct pci_dev *dev)
-- 
cgit v1.2.3


From 4cf0abbce69bde3d07757dfa9be6420407fdbc45 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Thu, 1 Apr 2021 18:43:15 +0200
Subject: PCI/VPD: Remove pci_vpd_find_tag() 'offset' argument

All callers pass 0 as offset. Therefore remove the parameter and use a
fixed offset 0 in pci_vpd_find_tag().

Link: https://lore.kernel.org/r/f62e6e19-5423-2ead-b2bd-62844b23ef8f@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/net/ethernet/broadcom/bnx2.c             | 2 +-
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c | 3 +--
 drivers/net/ethernet/broadcom/bnxt/bnxt.c        | 2 +-
 drivers/net/ethernet/broadcom/tg3.c              | 4 ++--
 drivers/net/ethernet/chelsio/cxgb4/t4_hw.c       | 2 +-
 drivers/net/ethernet/sfc/efx.c                   | 2 +-
 drivers/net/ethernet/sfc/falcon/efx.c            | 2 +-
 drivers/pci/vpd.c                                | 4 ++--
 drivers/scsi/cxlflash/main.c                     | 3 +--
 include/linux/pci.h                              | 3 +--
 10 files changed, 12 insertions(+), 15 deletions(-)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/broadcom/bnx2.c b/drivers/net/ethernet/broadcom/bnx2.c
index 3e8a179f39db..c0986096c701 100644
--- a/drivers/net/ethernet/broadcom/bnx2.c
+++ b/drivers/net/ethernet/broadcom/bnx2.c
@@ -8057,7 +8057,7 @@ bnx2_read_vpd_fw_ver(struct bnx2 *bp)
 		data[i + 3] = data[i + BNX2_VPD_LEN];
 	}
 
-	i = pci_vpd_find_tag(data, 0, BNX2_VPD_LEN, PCI_VPD_LRDT_RO_DATA);
+	i = pci_vpd_find_tag(data, BNX2_VPD_LEN, PCI_VPD_LRDT_RO_DATA);
 	if (i < 0)
 		goto vpd_done;
 
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
index b652ed72a621..d267e45a0518 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -12207,8 +12207,7 @@ static void bnx2x_read_fwinfo(struct bnx2x *bp)
 	/* VPD RO tag should be first tag after identifier string, hence
 	 * we should be able to find it in first BNX2X_VPD_LEN chars
 	 */
-	i = pci_vpd_find_tag(vpd_start, 0, BNX2X_VPD_LEN,
-			     PCI_VPD_LRDT_RO_DATA);
+	i = pci_vpd_find_tag(vpd_start, BNX2X_VPD_LEN, PCI_VPD_LRDT_RO_DATA);
 	if (i < 0)
 		goto out_not_found;
 
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index a680fd9c68ea..2bccdac28a24 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -12668,7 +12668,7 @@ static void bnxt_vpd_read_info(struct bnxt *bp)
 		goto exit;
 	}
 
-	i = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA);
+	i = pci_vpd_find_tag(vpd_data, vpd_size, PCI_VPD_LRDT_RO_DATA);
 	if (i < 0) {
 		netdev_err(bp->dev, "VPD READ-Only not found\n");
 		goto exit;
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index d2381929931b..b0e49643f483 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -13016,7 +13016,7 @@ static int tg3_test_nvram(struct tg3 *tp)
 	if (!buf)
 		return -ENOMEM;
 
-	i = pci_vpd_find_tag((u8 *)buf, 0, len, PCI_VPD_LRDT_RO_DATA);
+	i = pci_vpd_find_tag((u8 *)buf, len, PCI_VPD_LRDT_RO_DATA);
 	if (i > 0) {
 		j = pci_vpd_lrdt_size(&((u8 *)buf)[i]);
 		if (j < 0)
@@ -15629,7 +15629,7 @@ static void tg3_read_vpd(struct tg3 *tp)
 	if (!vpd_data)
 		goto out_no_vpd;
 
-	i = pci_vpd_find_tag(vpd_data, 0, vpdlen, PCI_VPD_LRDT_RO_DATA);
+	i = pci_vpd_find_tag(vpd_data, vpdlen, PCI_VPD_LRDT_RO_DATA);
 	if (i < 0)
 		goto out_not_found;
 
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
index 98829e482bfa..ef5d10e1cce6 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
@@ -2774,7 +2774,7 @@ int t4_get_raw_vpd_params(struct adapter *adapter, struct vpd_params *p)
 	if (id_len > ID_LEN)
 		id_len = ID_LEN;
 
-	i = pci_vpd_find_tag(vpd, 0, VPD_LEN, PCI_VPD_LRDT_RO_DATA);
+	i = pci_vpd_find_tag(vpd, VPD_LEN, PCI_VPD_LRDT_RO_DATA);
 	if (i < 0) {
 		dev_err(adapter->pdev_dev, "missing VPD-R section\n");
 		ret = -EINVAL;
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index 36c8625a6fd7..c746ca7235f1 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -920,7 +920,7 @@ static void efx_probe_vpd_strings(struct efx_nic *efx)
 	}
 
 	/* Get the Read only section */
-	ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA);
+	ro_start = pci_vpd_find_tag(vpd_data, vpd_size, PCI_VPD_LRDT_RO_DATA);
 	if (ro_start < 0) {
 		netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n");
 		return;
diff --git a/drivers/net/ethernet/sfc/falcon/efx.c b/drivers/net/ethernet/sfc/falcon/efx.c
index f8979991970e..5e7a57b680ca 100644
--- a/drivers/net/ethernet/sfc/falcon/efx.c
+++ b/drivers/net/ethernet/sfc/falcon/efx.c
@@ -2800,7 +2800,7 @@ static void ef4_probe_vpd_strings(struct ef4_nic *efx)
 	}
 
 	/* Get the Read only section */
-	ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA);
+	ro_start = pci_vpd_find_tag(vpd_data, vpd_size, PCI_VPD_LRDT_RO_DATA);
 	if (ro_start < 0) {
 		netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n");
 		return;
diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index c1c4f7d80a04..79d4313c91a3 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -410,11 +410,11 @@ void pcie_vpd_remove_sysfs_dev_files(struct pci_dev *dev)
 	}
 }
 
-int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt)
+int pci_vpd_find_tag(const u8 *buf, unsigned int len, u8 rdt)
 {
 	int i;
 
-	for (i = off; i < len; ) {
+	for (i = 0; i < len; ) {
 		u8 val = buf[i];
 
 		if (val & PCI_VPD_LRDT) {
diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c
index e72440d919d2..ae0963cec222 100644
--- a/drivers/scsi/cxlflash/main.c
+++ b/drivers/scsi/cxlflash/main.c
@@ -1649,8 +1649,7 @@ static int read_vpd(struct cxlflash_cfg *cfg, u64 wwpn[])
 	}
 
 	/* Get the read only section offset */
-	ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size,
-				    PCI_VPD_LRDT_RO_DATA);
+	ro_start = pci_vpd_find_tag(vpd_data, vpd_size, PCI_VPD_LRDT_RO_DATA);
 	if (unlikely(ro_start < 0)) {
 		dev_err(dev, "%s: VPD Read-only data not found\n", __func__);
 		rc = -ENODEV;
diff --git a/include/linux/pci.h b/include/linux/pci.h
index edadc62ae058..1eb35c09674e 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -2310,14 +2310,13 @@ static inline u8 pci_vpd_info_field_size(const u8 *info_field)
 /**
  * pci_vpd_find_tag - Locates the Resource Data Type tag provided
  * @buf: Pointer to buffered vpd data
- * @off: The offset into the buffer at which to begin the search
  * @len: The length of the vpd buffer
  * @rdt: The Resource Data Type to search for
  *
  * Returns the index where the Resource Data Type was found or
  * -ENOENT otherwise.
  */
-int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
+int pci_vpd_find_tag(const u8 *buf, unsigned int len, u8 rdt);
 
 /**
  * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
-- 
cgit v1.2.3


From 0a08bc07610e172972985d6322fd671cff76c928 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Thu, 1 Apr 2021 18:44:15 +0200
Subject: PCI/VPD: Remove pci_vpd_find_tag() SRDT handling

Only SRDT tag is the end tag, and no caller is interested in it.  This
allows to remove all SRDT tag handling.

Link: https://lore.kernel.org/r/3f63f06f-734f-8fff-9518-27fe1faf903d@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/vpd.c | 31 ++++++-------------------------
 1 file changed, 6 insertions(+), 25 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index 79d4313c91a3..562d79b597b3 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -412,33 +412,14 @@ void pcie_vpd_remove_sysfs_dev_files(struct pci_dev *dev)
 
 int pci_vpd_find_tag(const u8 *buf, unsigned int len, u8 rdt)
 {
-	int i;
-
-	for (i = 0; i < len; ) {
-		u8 val = buf[i];
-
-		if (val & PCI_VPD_LRDT) {
-			/* Don't return success of the tag isn't complete */
-			if (i + PCI_VPD_LRDT_TAG_SIZE > len)
-				break;
+	int i = 0;
 
-			if (val == rdt)
-				return i;
-
-			i += PCI_VPD_LRDT_TAG_SIZE +
-			     pci_vpd_lrdt_size(&buf[i]);
-		} else {
-			u8 tag = val & ~PCI_VPD_SRDT_LEN_MASK;
-
-			if (tag == rdt)
-				return i;
-
-			if (tag == PCI_VPD_SRDT_END)
-				break;
+	/* look for LRDT tags only, end tag is the only SRDT tag */
+	while (i + PCI_VPD_LRDT_TAG_SIZE <= len && buf[i] & PCI_VPD_LRDT) {
+		if (buf[i] == rdt)
+			return i;
 
-			i += PCI_VPD_SRDT_TAG_SIZE +
-			     pci_vpd_srdt_size(&buf[i]);
-		}
+		i += PCI_VPD_LRDT_TAG_SIZE + pci_vpd_lrdt_size(buf + i);
 	}
 
 	return -ENOENT;
-- 
cgit v1.2.3


From 5881b38912f3f48a4bd74a4eed58be12df012063 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Fri, 16 Apr 2021 21:52:07 +0200
Subject: PCI/VPD: Add helper pci_get_func0_dev()

Factor out the "get function 0" logic into pci_get_func0_dev().

[bhelgaas: keep PCI_DEVFN(PCI_SLOT()) instead of exposing implementation
details, commit log]
Link: https://lore.kernel.org/r/75d1f619-8a35-690d-8fc8-e851264a4bbb@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/vpd.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index 562d79b597b3..c6aad87dd0f9 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -29,6 +29,11 @@ struct pci_vpd {
 	unsigned int	valid:1;
 };
 
+static struct pci_dev *pci_get_func0_dev(struct pci_dev *dev)
+{
+	return pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
+}
+
 /**
  * pci_read_vpd - Read one entry from Vital Product Data
  * @dev:	pci device struct
@@ -295,8 +300,7 @@ static const struct pci_vpd_ops pci_vpd_ops = {
 static ssize_t pci_vpd_f0_read(struct pci_dev *dev, loff_t pos, size_t count,
 			       void *arg)
 {
-	struct pci_dev *tdev = pci_get_slot(dev->bus,
-					    PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
+	struct pci_dev *tdev = pci_get_func0_dev(dev);
 	ssize_t ret;
 
 	if (!tdev)
@@ -310,8 +314,7 @@ static ssize_t pci_vpd_f0_read(struct pci_dev *dev, loff_t pos, size_t count,
 static ssize_t pci_vpd_f0_write(struct pci_dev *dev, loff_t pos, size_t count,
 				const void *arg)
 {
-	struct pci_dev *tdev = pci_get_slot(dev->bus,
-					    PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
+	struct pci_dev *tdev = pci_get_func0_dev(dev);
 	ssize_t ret;
 
 	if (!tdev)
@@ -457,7 +460,7 @@ static void quirk_f0_vpd_link(struct pci_dev *dev)
 	if (!PCI_FUNC(dev->devfn))
 		return;
 
-	f0 = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
+	f0 = pci_get_func0_dev(dev);
 	if (!f0)
 		return;
 
-- 
cgit v1.2.3


From e00dc69b5f17c444a38cd9745a0f76bc989b3af4 Mon Sep 17 00:00:00 2001
From: Arun Easi <aeasi@marvell.com>
Date: Fri, 9 Apr 2021 14:51:53 -0700
Subject: PCI: Allow VPD access for QLogic ISP2722

0d5370d1d852 ("PCI: Prevent VPD access for QLogic ISP2722") disabled access
to VPD of the ISP2722-based 16/32Gb Fibre Channel to PCIe Adapter because
reading past the end of the VPD caused NMIs.

104daa71b396 ("PCI: Determine actual VPD size on first access") limits
reads to the actual size of VPD, which should prevent these NMIs.

104daa71b396 was merged *before* 0d5370d1d852, but we think the testing
that prompted 0d5370d1d852 ("PCI: Prevent VPD access for QLogic ISP2722")
was done with a kernel that lacked 104daa71b396.  See [1, 2].

Remove the quirk added by 0d5370d1d852 ("PCI: Prevent VPD access for QLogic
ISP2722") so customers can read the HBA VPD.

[1] https://lore.kernel.org/linux-pci/alpine.LRH.2.21.9999.2012161641230.28924@irv1user01.caveonetworks.com/
[2] https://lore.kernel.org/linux-pci/alpine.LRH.2.21.9999.2104071535110.13940@irv1user01.caveonetworks.com/
[bhelgaas: commit log]
Link: https://lore.kernel.org/r/20210409215153.16569-2-aeasi@marvell.com
Signed-off-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: stable@vger.kernel.org      # v4.6+
---
 drivers/pci/vpd.c | 1 -
 1 file changed, 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index c6aad87dd0f9..8af31c5eec2d 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -500,7 +500,6 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x005d, quirk_blacklist_vpd);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x005f, quirk_blacklist_vpd);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, PCI_ANY_ID,
 		quirk_blacklist_vpd);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_QLOGIC, 0x2261, quirk_blacklist_vpd);
 /*
  * The Amazon Annapurna Labs 0x0031 device id is reused for other non Root Port
  * device types, so the quirk is registered for the PCI_CLASS_BRIDGE_PCI class.
-- 
cgit v1.2.3


From 64b9f64f80a6f4b7ea51bf0510119cb15e801dc6 Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Tue, 23 Feb 2021 14:19:05 +0800
Subject: vdpa: introduce virtio pci driver

This patch introduce a vDPA driver for virtio-pci device. It bridges
the virtio-pci control command to the vDPA bus. This will be used for
features prototyping and testing.

Note that get/restore virtqueue state is not supported which needs
extension on the virtio specification.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210223061905.422659-4-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/Makefile                  |   1 +
 drivers/vdpa/Kconfig              |   7 +
 drivers/vdpa/Makefile             |   1 +
 drivers/vdpa/virtio_pci/Makefile  |   2 +
 drivers/vdpa/virtio_pci/vp_vdpa.c | 458 ++++++++++++++++++++++++++++++++++++++
 5 files changed, 469 insertions(+)
 create mode 100644 drivers/vdpa/virtio_pci/Makefile
 create mode 100644 drivers/vdpa/virtio_pci/vp_vdpa.c

(limited to 'drivers')

diff --git a/drivers/Makefile b/drivers/Makefile
index 6fba7daba591..5ba932437869 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -42,6 +42,7 @@ obj-$(CONFIG_DMADEVICES)	+= dma/
 obj-y				+= soc/
 
 obj-$(CONFIG_VIRTIO)		+= virtio/
+obj-$(CONFIG_VIRTIO_PCI_LIB)	+= virtio/
 obj-$(CONFIG_VDPA)		+= vdpa/
 obj-$(CONFIG_XEN)		+= xen/
 
diff --git a/drivers/vdpa/Kconfig b/drivers/vdpa/Kconfig
index ffd1e098bfd2..a245809c99d0 100644
--- a/drivers/vdpa/Kconfig
+++ b/drivers/vdpa/Kconfig
@@ -52,4 +52,11 @@ config MLX5_VDPA_NET
 	  be executed by the hardware. It also supports a variety of stateless
 	  offloads depending on the actual device used and firmware version.
 
+config VP_VDPA
+	tristate "Virtio PCI bridge vDPA driver"
+	select VIRTIO_PCI_LIB
+	depends on PCI_MSI
+	help
+	  This kernel module bridges virtio PCI device to vDPA bus.
+
 endif # VDPA
diff --git a/drivers/vdpa/Makefile b/drivers/vdpa/Makefile
index d160e9b63a66..67fe7f3d6943 100644
--- a/drivers/vdpa/Makefile
+++ b/drivers/vdpa/Makefile
@@ -3,3 +3,4 @@ obj-$(CONFIG_VDPA) += vdpa.o
 obj-$(CONFIG_VDPA_SIM) += vdpa_sim/
 obj-$(CONFIG_IFCVF)    += ifcvf/
 obj-$(CONFIG_MLX5_VDPA) += mlx5/
+obj-$(CONFIG_VP_VDPA)    += virtio_pci/
diff --git a/drivers/vdpa/virtio_pci/Makefile b/drivers/vdpa/virtio_pci/Makefile
new file mode 100644
index 000000000000..231088d3af7d
--- /dev/null
+++ b/drivers/vdpa/virtio_pci/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_VP_VDPA) += vp_vdpa.o
diff --git a/drivers/vdpa/virtio_pci/vp_vdpa.c b/drivers/vdpa/virtio_pci/vp_vdpa.c
new file mode 100644
index 000000000000..1321a2fcd088
--- /dev/null
+++ b/drivers/vdpa/virtio_pci/vp_vdpa.c
@@ -0,0 +1,458 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * vDPA bridge driver for modern virtio-pci device
+ *
+ * Copyright (c) 2020, Red Hat Inc. All rights reserved.
+ * Author: Jason Wang <jasowang@redhat.com>
+ *
+ * Based on virtio_pci_modern.c.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/vdpa.h>
+#include <linux/virtio.h>
+#include <linux/virtio_config.h>
+#include <linux/virtio_ring.h>
+#include <linux/virtio_pci.h>
+#include <linux/virtio_pci_modern.h>
+
+#define VP_VDPA_QUEUE_MAX 256
+#define VP_VDPA_DRIVER_NAME "vp_vdpa"
+#define VP_VDPA_NAME_SIZE 256
+
+struct vp_vring {
+	void __iomem *notify;
+	char msix_name[VP_VDPA_NAME_SIZE];
+	struct vdpa_callback cb;
+	int irq;
+};
+
+struct vp_vdpa {
+	struct vdpa_device vdpa;
+	struct virtio_pci_modern_device mdev;
+	struct vp_vring *vring;
+	struct vdpa_callback config_cb;
+	char msix_name[VP_VDPA_NAME_SIZE];
+	int config_irq;
+	int queues;
+	int vectors;
+};
+
+static struct vp_vdpa *vdpa_to_vp(struct vdpa_device *vdpa)
+{
+	return container_of(vdpa, struct vp_vdpa, vdpa);
+}
+
+static struct virtio_pci_modern_device *vdpa_to_mdev(struct vdpa_device *vdpa)
+{
+	struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+
+	return &vp_vdpa->mdev;
+}
+
+static u64 vp_vdpa_get_features(struct vdpa_device *vdpa)
+{
+	struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);
+
+	return vp_modern_get_features(mdev);
+}
+
+static int vp_vdpa_set_features(struct vdpa_device *vdpa, u64 features)
+{
+	struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);
+
+	vp_modern_set_features(mdev, features);
+
+	return 0;
+}
+
+static u8 vp_vdpa_get_status(struct vdpa_device *vdpa)
+{
+	struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);
+
+	return vp_modern_get_status(mdev);
+}
+
+static void vp_vdpa_free_irq(struct vp_vdpa *vp_vdpa)
+{
+	struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev;
+	struct pci_dev *pdev = mdev->pci_dev;
+	int i;
+
+	for (i = 0; i < vp_vdpa->queues; i++) {
+		if (vp_vdpa->vring[i].irq != VIRTIO_MSI_NO_VECTOR) {
+			vp_modern_queue_vector(mdev, i, VIRTIO_MSI_NO_VECTOR);
+			devm_free_irq(&pdev->dev, vp_vdpa->vring[i].irq,
+				      &vp_vdpa->vring[i]);
+			vp_vdpa->vring[i].irq = VIRTIO_MSI_NO_VECTOR;
+		}
+	}
+
+	if (vp_vdpa->config_irq != VIRTIO_MSI_NO_VECTOR) {
+		vp_modern_config_vector(mdev, VIRTIO_MSI_NO_VECTOR);
+		devm_free_irq(&pdev->dev, vp_vdpa->config_irq, vp_vdpa);
+		vp_vdpa->config_irq = VIRTIO_MSI_NO_VECTOR;
+	}
+
+	if (vp_vdpa->vectors) {
+		pci_free_irq_vectors(pdev);
+		vp_vdpa->vectors = 0;
+	}
+}
+
+static irqreturn_t vp_vdpa_vq_handler(int irq, void *arg)
+{
+	struct vp_vring *vring = arg;
+
+	if (vring->cb.callback)
+		return vring->cb.callback(vring->cb.private);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t vp_vdpa_config_handler(int irq, void *arg)
+{
+	struct vp_vdpa *vp_vdpa = arg;
+
+	if (vp_vdpa->config_cb.callback)
+		return vp_vdpa->config_cb.callback(vp_vdpa->config_cb.private);
+
+	return IRQ_HANDLED;
+}
+
+static int vp_vdpa_request_irq(struct vp_vdpa *vp_vdpa)
+{
+	struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev;
+	struct pci_dev *pdev = mdev->pci_dev;
+	int i, ret, irq;
+	int queues = vp_vdpa->queues;
+	int vectors = queues + 1;
+
+	ret = pci_alloc_irq_vectors(pdev, vectors, vectors, PCI_IRQ_MSIX);
+	if (ret != vectors) {
+		dev_err(&pdev->dev,
+			"vp_vdpa: fail to allocate irq vectors want %d but %d\n",
+			vectors, ret);
+		return ret;
+	}
+
+	vp_vdpa->vectors = vectors;
+
+	for (i = 0; i < queues; i++) {
+		snprintf(vp_vdpa->vring[i].msix_name, VP_VDPA_NAME_SIZE,
+			"vp-vdpa[%s]-%d\n", pci_name(pdev), i);
+		irq = pci_irq_vector(pdev, i);
+		ret = devm_request_irq(&pdev->dev, irq,
+				       vp_vdpa_vq_handler,
+				       0, vp_vdpa->vring[i].msix_name,
+				       &vp_vdpa->vring[i]);
+		if (ret) {
+			dev_err(&pdev->dev,
+				"vp_vdpa: fail to request irq for vq %d\n", i);
+			goto err;
+		}
+		vp_modern_queue_vector(mdev, i, i);
+		vp_vdpa->vring[i].irq = irq;
+	}
+
+	snprintf(vp_vdpa->msix_name, VP_VDPA_NAME_SIZE, "vp-vdpa[%s]-config\n",
+		 pci_name(pdev));
+	irq = pci_irq_vector(pdev, queues);
+	ret = devm_request_irq(&pdev->dev, irq,	vp_vdpa_config_handler, 0,
+			       vp_vdpa->msix_name, vp_vdpa);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"vp_vdpa: fail to request irq for vq %d\n", i);
+			goto err;
+	}
+	vp_modern_config_vector(mdev, queues);
+	vp_vdpa->config_irq = irq;
+
+	return 0;
+err:
+	vp_vdpa_free_irq(vp_vdpa);
+	return ret;
+}
+
+static void vp_vdpa_set_status(struct vdpa_device *vdpa, u8 status)
+{
+	struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+	struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev;
+	u8 s = vp_vdpa_get_status(vdpa);
+
+	if (status & VIRTIO_CONFIG_S_DRIVER_OK &&
+	    !(s & VIRTIO_CONFIG_S_DRIVER_OK)) {
+		vp_vdpa_request_irq(vp_vdpa);
+	}
+
+	vp_modern_set_status(mdev, status);
+
+	if (!(status & VIRTIO_CONFIG_S_DRIVER_OK) &&
+	    (s & VIRTIO_CONFIG_S_DRIVER_OK))
+		vp_vdpa_free_irq(vp_vdpa);
+}
+
+static u16 vp_vdpa_get_vq_num_max(struct vdpa_device *vdpa)
+{
+	return VP_VDPA_QUEUE_MAX;
+}
+
+static int vp_vdpa_get_vq_state(struct vdpa_device *vdpa, u16 qid,
+				struct vdpa_vq_state *state)
+{
+	/* Note that this is not supported by virtio specification, so
+	 * we return -EOPNOTSUPP here. This means we can't support live
+	 * migration, vhost device start/stop.
+	 */
+	return -EOPNOTSUPP;
+}
+
+static int vp_vdpa_set_vq_state(struct vdpa_device *vdpa, u16 qid,
+				const struct vdpa_vq_state *state)
+{
+	/* Note that this is not supported by virtio specification, so
+	 * we return -ENOPOTSUPP here. This means we can't support live
+	 * migration, vhost device start/stop.
+	 */
+	return -EOPNOTSUPP;
+}
+
+static void vp_vdpa_set_vq_cb(struct vdpa_device *vdpa, u16 qid,
+			      struct vdpa_callback *cb)
+{
+	struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+
+	vp_vdpa->vring[qid].cb = *cb;
+}
+
+static void vp_vdpa_set_vq_ready(struct vdpa_device *vdpa,
+				 u16 qid, bool ready)
+{
+	struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);
+
+	vp_modern_set_queue_enable(mdev, qid, ready);
+}
+
+static bool vp_vdpa_get_vq_ready(struct vdpa_device *vdpa, u16 qid)
+{
+	struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);
+
+	return vp_modern_get_queue_enable(mdev, qid);
+}
+
+static void vp_vdpa_set_vq_num(struct vdpa_device *vdpa, u16 qid,
+			       u32 num)
+{
+	struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);
+
+	vp_modern_set_queue_size(mdev, qid, num);
+}
+
+static int vp_vdpa_set_vq_address(struct vdpa_device *vdpa, u16 qid,
+				  u64 desc_area, u64 driver_area,
+				  u64 device_area)
+{
+	struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);
+
+	vp_modern_queue_address(mdev, qid, desc_area,
+				driver_area, device_area);
+
+	return 0;
+}
+
+static void vp_vdpa_kick_vq(struct vdpa_device *vdpa, u16 qid)
+{
+	struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+
+	vp_iowrite16(qid, vp_vdpa->vring[qid].notify);
+}
+
+static u32 vp_vdpa_get_generation(struct vdpa_device *vdpa)
+{
+	struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);
+
+	return vp_modern_generation(mdev);
+}
+
+static u32 vp_vdpa_get_device_id(struct vdpa_device *vdpa)
+{
+	struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);
+
+	return mdev->id.device;
+}
+
+static u32 vp_vdpa_get_vendor_id(struct vdpa_device *vdpa)
+{
+	struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);
+
+	return mdev->id.vendor;
+}
+
+static u32 vp_vdpa_get_vq_align(struct vdpa_device *vdpa)
+{
+	return PAGE_SIZE;
+}
+
+static void vp_vdpa_get_config(struct vdpa_device *vdpa,
+			       unsigned int offset,
+			       void *buf, unsigned int len)
+{
+	struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+	struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev;
+	u8 old, new;
+	u8 *p;
+	int i;
+
+	do {
+		old = vp_ioread8(&mdev->common->config_generation);
+		p = buf;
+		for (i = 0; i < len; i++)
+			*p++ = vp_ioread8(mdev->device + offset + i);
+
+		new = vp_ioread8(&mdev->common->config_generation);
+	} while (old != new);
+}
+
+static void vp_vdpa_set_config(struct vdpa_device *vdpa,
+			       unsigned int offset, const void *buf,
+			       unsigned int len)
+{
+	struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+	struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev;
+	const u8 *p = buf;
+	int i;
+
+	for (i = 0; i < len; i++)
+		vp_iowrite8(*p++, mdev->device + offset + i);
+}
+
+static void vp_vdpa_set_config_cb(struct vdpa_device *vdpa,
+				  struct vdpa_callback *cb)
+{
+	struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+
+	vp_vdpa->config_cb = *cb;
+}
+
+static const struct vdpa_config_ops vp_vdpa_ops = {
+	.get_features	= vp_vdpa_get_features,
+	.set_features	= vp_vdpa_set_features,
+	.get_status	= vp_vdpa_get_status,
+	.set_status	= vp_vdpa_set_status,
+	.get_vq_num_max	= vp_vdpa_get_vq_num_max,
+	.get_vq_state	= vp_vdpa_get_vq_state,
+	.set_vq_state	= vp_vdpa_set_vq_state,
+	.set_vq_cb	= vp_vdpa_set_vq_cb,
+	.set_vq_ready	= vp_vdpa_set_vq_ready,
+	.get_vq_ready	= vp_vdpa_get_vq_ready,
+	.set_vq_num	= vp_vdpa_set_vq_num,
+	.set_vq_address	= vp_vdpa_set_vq_address,
+	.kick_vq	= vp_vdpa_kick_vq,
+	.get_generation	= vp_vdpa_get_generation,
+	.get_device_id	= vp_vdpa_get_device_id,
+	.get_vendor_id	= vp_vdpa_get_vendor_id,
+	.get_vq_align	= vp_vdpa_get_vq_align,
+	.get_config	= vp_vdpa_get_config,
+	.set_config	= vp_vdpa_set_config,
+	.set_config_cb  = vp_vdpa_set_config_cb,
+};
+
+static void vp_vdpa_free_irq_vectors(void *data)
+{
+	pci_free_irq_vectors(data);
+}
+
+static int vp_vdpa_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	struct virtio_pci_modern_device *mdev;
+	struct device *dev = &pdev->dev;
+	struct vp_vdpa *vp_vdpa;
+	u16 notify_off;
+	int ret, i;
+
+	ret = pcim_enable_device(pdev);
+	if (ret)
+		return ret;
+
+	vp_vdpa = vdpa_alloc_device(struct vp_vdpa, vdpa,
+				    dev, &vp_vdpa_ops, NULL);
+	if (vp_vdpa == NULL) {
+		dev_err(dev, "vp_vdpa: Failed to allocate vDPA structure\n");
+		return -ENOMEM;
+	}
+
+	mdev = &vp_vdpa->mdev;
+	mdev->pci_dev = pdev;
+
+	ret = vp_modern_probe(mdev);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to probe modern PCI device\n");
+		goto err;
+	}
+
+	pci_set_master(pdev);
+	pci_set_drvdata(pdev, vp_vdpa);
+
+	vp_vdpa->vdpa.dma_dev = &pdev->dev;
+	vp_vdpa->queues = vp_modern_get_num_queues(mdev);
+
+	ret = devm_add_action_or_reset(dev, vp_vdpa_free_irq_vectors, pdev);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"Failed for adding devres for freeing irq vectors\n");
+		goto err;
+	}
+
+	vp_vdpa->vring = devm_kcalloc(&pdev->dev, vp_vdpa->queues,
+				      sizeof(*vp_vdpa->vring),
+				      GFP_KERNEL);
+	if (!vp_vdpa->vring) {
+		ret = -ENOMEM;
+		dev_err(&pdev->dev, "Fail to allocate virtqueues\n");
+		goto err;
+	}
+
+	for (i = 0; i < vp_vdpa->queues; i++) {
+		notify_off = vp_modern_get_queue_notify_off(mdev, i);
+		vp_vdpa->vring[i].irq = VIRTIO_MSI_NO_VECTOR;
+		vp_vdpa->vring[i].notify = mdev->notify_base +
+			notify_off * mdev->notify_offset_multiplier;
+	}
+	vp_vdpa->config_irq = VIRTIO_MSI_NO_VECTOR;
+
+	ret = vdpa_register_device(&vp_vdpa->vdpa, vp_vdpa->queues);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to register to vdpa bus\n");
+		goto err;
+	}
+
+	return 0;
+
+err:
+	put_device(&vp_vdpa->vdpa.dev);
+	return ret;
+}
+
+static void vp_vdpa_remove(struct pci_dev *pdev)
+{
+	struct vp_vdpa *vp_vdpa = pci_get_drvdata(pdev);
+
+	vdpa_unregister_device(&vp_vdpa->vdpa);
+	vp_modern_remove(&vp_vdpa->mdev);
+}
+
+static struct pci_driver vp_vdpa_driver = {
+	.name		= "vp-vdpa",
+	.id_table	= NULL, /* only dynamic ids */
+	.probe		= vp_vdpa_probe,
+	.remove		= vp_vdpa_remove,
+};
+
+module_pci_driver(vp_vdpa_driver);
+
+MODULE_AUTHOR("Jason Wang <jasowang@redhat.com>");
+MODULE_DESCRIPTION("vp-vdpa");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1");
-- 
cgit v1.2.3


From 58926c8aab104daa49f35b9fcf664d95c22c8ac7 Mon Sep 17 00:00:00 2001
From: Eli Cohen <elic@nvidia.com>
Date: Thu, 8 Apr 2021 12:13:21 +0300
Subject: vdpa/mlx5: Enable user to add/delete vdpa device

Allow to control vdpa device creation and destruction using the vdpa
management tool.

Examples:
1. List the management devices
$ vdpa mgmtdev show
pci/0000:3b:00.1:
  supported_classes net

2. Create vdpa instance
$ vdpa dev add mgmtdev pci/0000:3b:00.1 name vdpa0

3. Show vdpa devices
$ vdpa dev show
vdpa0: type network mgmtdev pci/0000:3b:00.1 vendor_id 5555 max_vqs 16 \
max_vq_size 256

Signed-off-by: Eli Cohen <elic@nvidia.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210408091320.4600-1-elic@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/mlx5/net/mlx5_vnet.c | 79 ++++++++++++++++++++++++++++++++++-----
 1 file changed, 70 insertions(+), 9 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 4d2809c7d4e3..25533db01f5f 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -1974,23 +1974,32 @@ static void init_mvqs(struct mlx5_vdpa_net *ndev)
 	}
 }
 
-static int mlx5v_probe(struct auxiliary_device *adev,
-		       const struct auxiliary_device_id *id)
+struct mlx5_vdpa_mgmtdev {
+	struct vdpa_mgmt_dev mgtdev;
+	struct mlx5_adev *madev;
+	struct mlx5_vdpa_net *ndev;
+};
+
+static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name)
 {
-	struct mlx5_adev *madev = container_of(adev, struct mlx5_adev, adev);
-	struct mlx5_core_dev *mdev = madev->mdev;
+	struct mlx5_vdpa_mgmtdev *mgtdev = container_of(v_mdev, struct mlx5_vdpa_mgmtdev, mgtdev);
 	struct virtio_net_config *config;
 	struct mlx5_vdpa_dev *mvdev;
 	struct mlx5_vdpa_net *ndev;
+	struct mlx5_core_dev *mdev;
 	u32 max_vqs;
 	int err;
 
+	if (mgtdev->ndev)
+		return -ENOSPC;
+
+	mdev = mgtdev->madev->mdev;
 	/* we save one virtqueue for control virtqueue should we require it */
 	max_vqs = MLX5_CAP_DEV_VDPA_EMULATION(mdev, max_num_virtio_queues);
 	max_vqs = min_t(u32, max_vqs, MLX5_MAX_SUPPORTED_VQS);
 
 	ndev = vdpa_alloc_device(struct mlx5_vdpa_net, mvdev.vdev, mdev->device, &mlx5_vdpa_ops,
-				 NULL);
+				 name);
 	if (IS_ERR(ndev))
 		return PTR_ERR(ndev);
 
@@ -2017,11 +2026,12 @@ static int mlx5v_probe(struct auxiliary_device *adev,
 	if (err)
 		goto err_res;
 
-	err = vdpa_register_device(&mvdev->vdev, 2 * mlx5_vdpa_max_qps(max_vqs));
+	mvdev->vdev.mdev = &mgtdev->mgtdev;
+	err = _vdpa_register_device(&mvdev->vdev, 2 * mlx5_vdpa_max_qps(max_vqs));
 	if (err)
 		goto err_reg;
 
-	dev_set_drvdata(&adev->dev, ndev);
+	mgtdev->ndev = ndev;
 	return 0;
 
 err_reg:
@@ -2034,11 +2044,62 @@ err_mtu:
 	return err;
 }
 
+static void mlx5_vdpa_dev_del(struct vdpa_mgmt_dev *v_mdev, struct vdpa_device *dev)
+{
+	struct mlx5_vdpa_mgmtdev *mgtdev = container_of(v_mdev, struct mlx5_vdpa_mgmtdev, mgtdev);
+
+	_vdpa_unregister_device(dev);
+	mgtdev->ndev = NULL;
+}
+
+static const struct vdpa_mgmtdev_ops mdev_ops = {
+	.dev_add = mlx5_vdpa_dev_add,
+	.dev_del = mlx5_vdpa_dev_del,
+};
+
+static struct virtio_device_id id_table[] = {
+	{ VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID },
+	{ 0 },
+};
+
+static int mlx5v_probe(struct auxiliary_device *adev,
+		       const struct auxiliary_device_id *id)
+
+{
+	struct mlx5_adev *madev = container_of(adev, struct mlx5_adev, adev);
+	struct mlx5_core_dev *mdev = madev->mdev;
+	struct mlx5_vdpa_mgmtdev *mgtdev;
+	int err;
+
+	mgtdev = kzalloc(sizeof(*mgtdev), GFP_KERNEL);
+	if (!mgtdev)
+		return -ENOMEM;
+
+	mgtdev->mgtdev.ops = &mdev_ops;
+	mgtdev->mgtdev.device = mdev->device;
+	mgtdev->mgtdev.id_table = id_table;
+	mgtdev->madev = madev;
+
+	err = vdpa_mgmtdev_register(&mgtdev->mgtdev);
+	if (err)
+		goto reg_err;
+
+	dev_set_drvdata(&adev->dev, mgtdev);
+
+	return 0;
+
+reg_err:
+	kfree(mgtdev);
+	return err;
+}
+
 static void mlx5v_remove(struct auxiliary_device *adev)
 {
-	struct mlx5_vdpa_dev *mvdev = dev_get_drvdata(&adev->dev);
+	struct mlx5_vdpa_mgmtdev *mgtdev;
 
-	vdpa_unregister_device(&mvdev->vdev);
+	mgtdev = dev_get_drvdata(&adev->dev);
+	vdpa_mgmtdev_unregister(&mgtdev->mgtdev);
+	kfree(mgtdev);
 }
 
 static const struct auxiliary_device_id mlx5v_id_table[] = {
-- 
cgit v1.2.3


From c0a54b4bcb457232d5dce36ffbcd31d201ba3332 Mon Sep 17 00:00:00 2001
From: Parav Pandit <parav@nvidia.com>
Date: Tue, 6 Apr 2021 20:04:45 +0300
Subject: vdpa: Follow kdoc comment style

Follow comment style mentioned in the Writing kernel-doc document [1].

Following warnings are fixed.

$ scripts/kernel-doc -v -none drivers/vdpa/vdpa.c
drivers/vdpa/vdpa.c:67: info: Scanning doc for __vdpa_alloc_device
drivers/vdpa/vdpa.c:84: warning: No description found for return value of '__vdpa_alloc_device'
drivers/vdpa/vdpa.c:153: info: Scanning doc for _vdpa_register_device
drivers/vdpa/vdpa.c:163: warning: No description found for return value of '_vdpa_register_device'
drivers/vdpa/vdpa.c:172: info: Scanning doc for vdpa_register_device
drivers/vdpa/vdpa.c:180: warning: No description found for return value of 'vdpa_register_device'
drivers/vdpa/vdpa.c:191: info: Scanning doc for _vdpa_unregister_device
drivers/vdpa/vdpa.c:205: info: Scanning doc for vdpa_unregister_device
drivers/vdpa/vdpa.c:217: info: Scanning doc for __vdpa_register_driver
drivers/vdpa/vdpa.c:224: warning: No description found for return value of '__vdpa_register_driver'
drivers/vdpa/vdpa.c:233: info: Scanning doc for vdpa_unregister_driver
drivers/vdpa/vdpa.c:243: info: Scanning doc for vdpa_mgmtdev_register
drivers/vdpa/vdpa.c:250: warning: No description found for return value of 'vdpa_mgmtdev_register'

After the fix:

scripts/kernel-doc -v -none drivers/vdpa/vdpa.c
drivers/vdpa/vdpa.c:67: info: Scanning doc for __vdpa_alloc_device
drivers/vdpa/vdpa.c:153: info: Scanning doc for _vdpa_register_device
drivers/vdpa/vdpa.c:172: info: Scanning doc for vdpa_register_device
drivers/vdpa/vdpa.c:191: info: Scanning doc for _vdpa_unregister_device
drivers/vdpa/vdpa.c:205: info: Scanning doc for vdpa_unregister_device
drivers/vdpa/vdpa.c:217: info: Scanning doc for __vdpa_register_driver
drivers/vdpa/vdpa.c:233: info: Scanning doc for vdpa_unregister_driver
drivers/vdpa/vdpa.c:243: info: Scanning doc for vdpa_mgmtdev_register

[1] https://www.kernel.org/doc/html/latest/doc-guide/kernel-doc.html

Signed-off-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
Link: https://lore.kernel.org/r/20210406170457.98481-3-parav@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/vdpa.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index 5cffce67cab0..bb3f1d1f0422 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -75,8 +75,8 @@ static void vdpa_release_dev(struct device *d)
  * Driver should use vdpa_alloc_device() wrapper macro instead of
  * using this directly.
  *
- * Returns an error when parent/config/dma_dev is not set or fail to get
- * ida.
+ * Return: Returns an error when parent/config/dma_dev is not set or fail to get
+ *	   ida.
  */
 struct vdpa_device *__vdpa_alloc_device(struct device *parent,
 					const struct vdpa_config_ops *config,
@@ -157,7 +157,7 @@ static int __vdpa_register_device(struct vdpa_device *vdev, int nvqs)
  * @vdev: the vdpa device to be registered to vDPA bus
  * @nvqs: number of virtqueues supported by this device
  *
- * Returns an error when fail to add device to vDPA bus
+ * Return: Returns an error when fail to add device to vDPA bus
  */
 int _vdpa_register_device(struct vdpa_device *vdev, int nvqs)
 {
@@ -174,7 +174,7 @@ EXPORT_SYMBOL_GPL(_vdpa_register_device);
  * @vdev: the vdpa device to be registered to vDPA bus
  * @nvqs: number of virtqueues supported by this device
  *
- * Returns an error when fail to add to vDPA bus
+ * Return: Returns an error when fail to add to vDPA bus
  */
 int vdpa_register_device(struct vdpa_device *vdev, int nvqs)
 {
@@ -218,7 +218,7 @@ EXPORT_SYMBOL_GPL(vdpa_unregister_device);
  * @drv: the vdpa device driver to be registered
  * @owner: module owner of the driver
  *
- * Returns an err when fail to do the registration
+ * Return: Returns an err when fail to do the registration
  */
 int __vdpa_register_driver(struct vdpa_driver *drv, struct module *owner)
 {
@@ -245,6 +245,8 @@ EXPORT_SYMBOL_GPL(vdpa_unregister_driver);
  * @mdev: Pointer to vdpa management device
  * vdpa_mgmtdev_register() register a vdpa management device which supports
  * vdpa device management.
+ * Return: Returns 0 on success or failure when required callback ops are not
+ *         initialized.
  */
 int vdpa_mgmtdev_register(struct vdpa_mgmt_dev *mdev)
 {
-- 
cgit v1.2.3


From 3fd02fbbfac0dabb624606d1303d309f34ec15d4 Mon Sep 17 00:00:00 2001
From: Liu Xiang <liu.xiang@zlingsmart.com>
Date: Sat, 27 Mar 2021 11:17:10 +0800
Subject: virtio-balloon: fix a typo in comment of virtballoon_migratepage()

Typo: compation --> compaction

Signed-off-by: Liu Xiang <liu.xiang@zlingsmart.com>
Link: https://lore.kernel.org/r/20210327031710.16151-1-liu.xiang@zlingsmart.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
---
 drivers/virtio/virtio_balloon.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 8985fc2cea86..510e9318854d 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -734,7 +734,7 @@ static void report_free_page_func(struct work_struct *work)
 #ifdef CONFIG_BALLOON_COMPACTION
 /*
  * virtballoon_migratepage - perform the balloon page migration on behalf of
- *			     a compation thread.     (called under page lock)
+ *			     a compaction thread.     (called under page lock)
  * @vb_dev_info: the balloon device
  * @newpage: page that will replace the isolated page after migration finishes.
  * @page   : the isolated (old) page that is about to be migrated to newpage.
-- 
cgit v1.2.3


From 122b84a1267aec28ab929edae1ac700a03fb65e0 Mon Sep 17 00:00:00 2001
From: Max Gurtovoy <mgurtovoy@nvidia.com>
Date: Sun, 2 May 2021 12:33:19 +0300
Subject: virtio-net: don't allocate control_buf if not supported

Not all virtio_net devices support the ctrl queue feature. Thus, there
is no need to allocate unused resources.

Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Link: https://lore.kernel.org/r/20210502093319.61313-1-mgurtovoy@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/net/virtio_net.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 0824e6999e49..ac0c143f97b4 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2801,9 +2801,13 @@ static int virtnet_alloc_queues(struct virtnet_info *vi)
 {
 	int i;
 
-	vi->ctrl = kzalloc(sizeof(*vi->ctrl), GFP_KERNEL);
-	if (!vi->ctrl)
-		goto err_ctrl;
+	if (vi->has_cvq) {
+		vi->ctrl = kzalloc(sizeof(*vi->ctrl), GFP_KERNEL);
+		if (!vi->ctrl)
+			goto err_ctrl;
+	} else {
+		vi->ctrl = NULL;
+	}
 	vi->sq = kcalloc(vi->max_queue_pairs, sizeof(*vi->sq), GFP_KERNEL);
 	if (!vi->sq)
 		goto err_sq;
-- 
cgit v1.2.3


From 9e3bb9b79a7131a088cfffbdcc30e747dad9d090 Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Thu, 15 Apr 2021 03:31:41 -0400
Subject: virtio_pci_modern: introduce helper to map vq notify area

This patch factors out the logic of vq notify area mapping. Following
patches will switch to use this common helpers for both virtio_pci
library and virtio-pci vDPA driver.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210415073147.19331-2-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
---
 drivers/virtio/virtio_pci_modern_dev.c | 35 ++++++++++++++++++++++++++++++++++
 include/linux/virtio_pci_modern.h      |  2 ++
 2 files changed, 37 insertions(+)

(limited to 'drivers')

diff --git a/drivers/virtio/virtio_pci_modern_dev.c b/drivers/virtio/virtio_pci_modern_dev.c
index cbd667496bb1..28cb5847fafa 100644
--- a/drivers/virtio/virtio_pci_modern_dev.c
+++ b/drivers/virtio/virtio_pci_modern_dev.c
@@ -593,6 +593,41 @@ u16 vp_modern_get_queue_notify_off(struct virtio_pci_modern_device *mdev,
 }
 EXPORT_SYMBOL_GPL(vp_modern_get_queue_notify_off);
 
+/*
+ * vp_modern_map_vq_notify - map notification area for a
+ * specific virtqueue
+ * @mdev: the modern virtio-pci device
+ * @index: the queue index
+ *
+ * Returns the address of the notification area
+ */
+void *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
+			      u16 index)
+{
+	u16 off = vp_modern_get_queue_notify_off(mdev, index);
+
+	if (mdev->notify_base) {
+		/* offset should not wrap */
+		if ((u64)off * mdev->notify_offset_multiplier + 2
+			> mdev->notify_len) {
+			dev_warn(&mdev->pci_dev->dev,
+				 "bad notification offset %u (x %u) "
+				 "for queue %u > %zd",
+				 off, mdev->notify_offset_multiplier,
+				 index, mdev->notify_len);
+			return NULL;
+		}
+		return (void __force *)mdev->notify_base +
+			off * mdev->notify_offset_multiplier;
+	} else {
+		return (void __force *)vp_modern_map_capability(mdev,
+				       mdev->notify_map_cap, 2, 2,
+				       off * mdev->notify_offset_multiplier, 2,
+				       NULL);
+	}
+}
+EXPORT_SYMBOL_GPL(vp_modern_map_vq_notify);
+
 MODULE_VERSION("0.1");
 MODULE_DESCRIPTION("Modern Virtio PCI Device");
 MODULE_AUTHOR("Jason Wang <jasowang@redhat.com>");
diff --git a/include/linux/virtio_pci_modern.h b/include/linux/virtio_pci_modern.h
index f26acbeec965..1b95d39b00fc 100644
--- a/include/linux/virtio_pci_modern.h
+++ b/include/linux/virtio_pci_modern.h
@@ -106,6 +106,8 @@ void __iomem *vp_modern_map_capability(struct virtio_pci_modern_device *mdev, in
 				       u32 align,
 				       u32 start, u32 size,
 				       size_t *len);
+void *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
+                              u16 index);
 int vp_modern_probe(struct virtio_pci_modern_device *mdev);
 void vp_modern_remove(struct virtio_pci_modern_device *mdev);
 #endif
-- 
cgit v1.2.3


From 7dca6c0ea96b9e583ebcf95fe3c14ba3385f467b Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Thu, 15 Apr 2021 03:31:42 -0400
Subject: virtio-pci library: switch to use vp_modern_map_vq_notify()

This patch switch to use vp_modern_map_notify() for virtio-pci
library.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210415073147.19331-3-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
---
 drivers/virtio/virtio_pci_modern.c | 27 ++-------------------------
 1 file changed, 2 insertions(+), 25 deletions(-)

(limited to 'drivers')

diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index fbd4ebc00eb6..29607d9bd95c 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -192,7 +192,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
 
 	struct virtio_pci_modern_device *mdev = &vp_dev->mdev;
 	struct virtqueue *vq;
-	u16 num, off;
+	u16 num;
 	int err;
 
 	if (index >= vp_modern_get_num_queues(mdev))
@@ -208,9 +208,6 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
 		return ERR_PTR(-EINVAL);
 	}
 
-	/* get offset of notification word for this vq */
-	off = vp_modern_get_queue_notify_off(mdev, index);
-
 	info->msix_vector = msix_vec;
 
 	/* create the vring */
@@ -227,27 +224,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
 				virtqueue_get_avail_addr(vq),
 				virtqueue_get_used_addr(vq));
 
-	if (mdev->notify_base) {
-		/* offset should not wrap */
-		if ((u64)off * mdev->notify_offset_multiplier + 2
-		    > mdev->notify_len) {
-			dev_warn(&mdev->pci_dev->dev,
-				 "bad notification offset %u (x %u) "
-				 "for queue %u > %zd",
-				 off, mdev->notify_offset_multiplier,
-				 index, mdev->notify_len);
-			err = -EINVAL;
-			goto err_map_notify;
-		}
-		vq->priv = (void __force *)mdev->notify_base +
-			off * mdev->notify_offset_multiplier;
-	} else {
-		vq->priv = (void __force *)vp_modern_map_capability(mdev,
-							  mdev->notify_map_cap, 2, 2,
-							  off * mdev->notify_offset_multiplier, 2,
-							  NULL);
-	}
-
+	vq->priv = vp_modern_map_vq_notify(mdev, index);
 	if (!vq->priv) {
 		err = -ENOMEM;
 		goto err_map_notify;
-- 
cgit v1.2.3


From 11d8ffed00b231356008b35a3b0bc192e42333fa Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Thu, 15 Apr 2021 03:31:43 -0400
Subject: vp_vdpa: switch to use vp_modern_map_vq_notify()

This patch switches to use vp_vdpa to use vp_modern_map_notify().

Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210415073147.19331-4-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
---
 drivers/vdpa/virtio_pci/vp_vdpa.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/virtio_pci/vp_vdpa.c b/drivers/vdpa/virtio_pci/vp_vdpa.c
index 1321a2fcd088..2afc90645660 100644
--- a/drivers/vdpa/virtio_pci/vp_vdpa.c
+++ b/drivers/vdpa/virtio_pci/vp_vdpa.c
@@ -369,7 +369,6 @@ static int vp_vdpa_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	struct virtio_pci_modern_device *mdev;
 	struct device *dev = &pdev->dev;
 	struct vp_vdpa *vp_vdpa;
-	u16 notify_off;
 	int ret, i;
 
 	ret = pcim_enable_device(pdev);
@@ -415,10 +414,12 @@ static int vp_vdpa_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	}
 
 	for (i = 0; i < vp_vdpa->queues; i++) {
-		notify_off = vp_modern_get_queue_notify_off(mdev, i);
 		vp_vdpa->vring[i].irq = VIRTIO_MSI_NO_VECTOR;
-		vp_vdpa->vring[i].notify = mdev->notify_base +
-			notify_off * mdev->notify_offset_multiplier;
+		vp_vdpa->vring[i].notify = vp_modern_map_vq_notify(mdev, i);
+		if (!vp_vdpa->vring[i].notify) {
+			dev_warn(&pdev->dev, "Fail to map vq notify %d\n", i);
+			goto err;
+		}
 	}
 	vp_vdpa->config_irq = VIRTIO_MSI_NO_VECTOR;
 
-- 
cgit v1.2.3


From a5f7a24f49d81fab9f59611814a8817cc8a876a2 Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Thu, 15 Apr 2021 03:31:44 -0400
Subject: virtio_pci_modern: hide vp_modern_get_queue_notify_off()

All users (both virtio-pci library and vp_vdpa driver) has been
switched to use vp_modern_map_vq_notify(). So there's no need to
export the low level helper of vp_modern_get_queue_notify_off().

Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210415073147.19331-5-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
---
 drivers/virtio/virtio_pci_modern_dev.c | 5 ++---
 include/linux/virtio_pci_modern.h      | 2 --
 2 files changed, 2 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/virtio/virtio_pci_modern_dev.c b/drivers/virtio/virtio_pci_modern_dev.c
index 28cb5847fafa..5a657e56b46d 100644
--- a/drivers/virtio/virtio_pci_modern_dev.c
+++ b/drivers/virtio/virtio_pci_modern_dev.c
@@ -584,14 +584,13 @@ EXPORT_SYMBOL_GPL(vp_modern_get_num_queues);
  *
  * Returns the notification offset for a virtqueue
  */
-u16 vp_modern_get_queue_notify_off(struct virtio_pci_modern_device *mdev,
-				   u16 index)
+static u16 vp_modern_get_queue_notify_off(struct virtio_pci_modern_device *mdev,
+					  u16 index)
 {
 	vp_iowrite16(index, &mdev->common->queue_select);
 
 	return vp_ioread16(&mdev->common->queue_notify_off);
 }
-EXPORT_SYMBOL_GPL(vp_modern_get_queue_notify_off);
 
 /*
  * vp_modern_map_vq_notify - map notification area for a
diff --git a/include/linux/virtio_pci_modern.h b/include/linux/virtio_pci_modern.h
index 1b95d39b00fc..179a2fb4bf37 100644
--- a/include/linux/virtio_pci_modern.h
+++ b/include/linux/virtio_pci_modern.h
@@ -99,8 +99,6 @@ void vp_modern_set_queue_size(struct virtio_pci_modern_device *mdev,
 u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev,
 			     u16 idx);
 u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev);
-u16 vp_modern_get_queue_notify_off(struct virtio_pci_modern_device *mdev,
-				   u16 idx);
 void __iomem *vp_modern_map_capability(struct virtio_pci_modern_device *mdev, int off,
 				       size_t minlen,
 				       u32 align,
-- 
cgit v1.2.3


From fd466b36940b22a506265edf12714bd0cf9ed836 Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Thu, 15 Apr 2021 03:31:45 -0400
Subject: virito_pci libray: hide vp_modern_map_capability()

No user now and the capability should not be setup
externally. Instead, every access to the capability should be done via
virtio_pci_modern_device.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210415073147.19331-6-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
---
 drivers/virtio/virtio_pci_modern_dev.c | 10 ++++------
 include/linux/virtio_pci_modern.h      |  5 -----
 2 files changed, 4 insertions(+), 11 deletions(-)

(limited to 'drivers')

diff --git a/drivers/virtio/virtio_pci_modern_dev.c b/drivers/virtio/virtio_pci_modern_dev.c
index 5a657e56b46d..9c241c9bd920 100644
--- a/drivers/virtio/virtio_pci_modern_dev.c
+++ b/drivers/virtio/virtio_pci_modern_dev.c
@@ -16,11 +16,10 @@
  *
  * Returns the io address of for the part of the capability
  */
-void __iomem *vp_modern_map_capability(struct virtio_pci_modern_device *mdev, int off,
-				       size_t minlen,
-				       u32 align,
-				       u32 start, u32 size,
-				       size_t *len)
+static void __iomem *
+vp_modern_map_capability(struct virtio_pci_modern_device *mdev, int off,
+			 size_t minlen, u32 align, u32 start, u32 size,
+			 size_t *len)
 {
 	struct pci_dev *dev = mdev->pci_dev;
 	u8 bar;
@@ -90,7 +89,6 @@ void __iomem *vp_modern_map_capability(struct virtio_pci_modern_device *mdev, in
 			length, offset, bar);
 	return p;
 }
-EXPORT_SYMBOL_GPL(vp_modern_map_capability);
 
 /**
  * virtio_pci_find_capability - walk capabilities to find device info.
diff --git a/include/linux/virtio_pci_modern.h b/include/linux/virtio_pci_modern.h
index 179a2fb4bf37..e6e7072413c1 100644
--- a/include/linux/virtio_pci_modern.h
+++ b/include/linux/virtio_pci_modern.h
@@ -99,11 +99,6 @@ void vp_modern_set_queue_size(struct virtio_pci_modern_device *mdev,
 u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev,
 			     u16 idx);
 u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev);
-void __iomem *vp_modern_map_capability(struct virtio_pci_modern_device *mdev, int off,
-				       size_t minlen,
-				       u32 align,
-				       u32 start, u32 size,
-				       size_t *len);
 void *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
                               u16 index);
 int vp_modern_probe(struct virtio_pci_modern_device *mdev);
-- 
cgit v1.2.3


From 9e311bcad73dc14bd0a736db6ad3d382227e11fe Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Thu, 15 Apr 2021 03:31:46 -0400
Subject: virtio-pci library: report resource address

Sometimes it might be useful to report the capability physical
address. One example is to report the physical address of the doorbell
in order to be mapped by userspace.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210415073147.19331-7-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/virtio_pci/vp_vdpa.c      |  3 ++-
 drivers/virtio/virtio_pci_modern.c     |  2 +-
 drivers/virtio/virtio_pci_modern_dev.c | 24 +++++++++++++++++-------
 include/linux/virtio_pci_modern.h      |  4 +++-
 4 files changed, 23 insertions(+), 10 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/virtio_pci/vp_vdpa.c b/drivers/vdpa/virtio_pci/vp_vdpa.c
index 2afc90645660..98205e54d089 100644
--- a/drivers/vdpa/virtio_pci/vp_vdpa.c
+++ b/drivers/vdpa/virtio_pci/vp_vdpa.c
@@ -415,7 +415,8 @@ static int vp_vdpa_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 
 	for (i = 0; i < vp_vdpa->queues; i++) {
 		vp_vdpa->vring[i].irq = VIRTIO_MSI_NO_VECTOR;
-		vp_vdpa->vring[i].notify = vp_modern_map_vq_notify(mdev, i);
+		vp_vdpa->vring[i].notify =
+			vp_modern_map_vq_notify(mdev, i, NULL);
 		if (!vp_vdpa->vring[i].notify) {
 			dev_warn(&pdev->dev, "Fail to map vq notify %d\n", i);
 			goto err;
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index 29607d9bd95c..722ea44e7579 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -224,7 +224,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
 				virtqueue_get_avail_addr(vq),
 				virtqueue_get_used_addr(vq));
 
-	vq->priv = vp_modern_map_vq_notify(mdev, index);
+	vq->priv = vp_modern_map_vq_notify(mdev, index, NULL);
 	if (!vq->priv) {
 		err = -ENOMEM;
 		goto err_map_notify;
diff --git a/drivers/virtio/virtio_pci_modern_dev.c b/drivers/virtio/virtio_pci_modern_dev.c
index 9c241c9bd920..ae87b3fa8858 100644
--- a/drivers/virtio/virtio_pci_modern_dev.c
+++ b/drivers/virtio/virtio_pci_modern_dev.c
@@ -13,13 +13,14 @@
  * @start: start from the capability
  * @size: map size
  * @len: the length that is actually mapped
+ * @pa: physical address of the capability
  *
  * Returns the io address of for the part of the capability
  */
 static void __iomem *
 vp_modern_map_capability(struct virtio_pci_modern_device *mdev, int off,
 			 size_t minlen, u32 align, u32 start, u32 size,
-			 size_t *len)
+			 size_t *len, resource_size_t *pa)
 {
 	struct pci_dev *dev = mdev->pci_dev;
 	u8 bar;
@@ -87,6 +88,9 @@ vp_modern_map_capability(struct virtio_pci_modern_device *mdev, int off,
 		dev_err(&dev->dev,
 			"virtio_pci: unable to map virtio %u@%u on bar %i\n",
 			length, offset, bar);
+	else if (pa)
+		*pa = pci_resource_start(dev, bar) + offset;
+
 	return p;
 }
 
@@ -273,12 +277,12 @@ int vp_modern_probe(struct virtio_pci_modern_device *mdev)
 	mdev->common = vp_modern_map_capability(mdev, common,
 				      sizeof(struct virtio_pci_common_cfg), 4,
 				      0, sizeof(struct virtio_pci_common_cfg),
-				      NULL);
+				      NULL, NULL);
 	if (!mdev->common)
 		goto err_map_common;
 	mdev->isr = vp_modern_map_capability(mdev, isr, sizeof(u8), 1,
 					     0, 1,
-					     NULL);
+					     NULL, NULL);
 	if (!mdev->isr)
 		goto err_map_isr;
 
@@ -306,7 +310,8 @@ int vp_modern_probe(struct virtio_pci_modern_device *mdev)
 		mdev->notify_base = vp_modern_map_capability(mdev, notify,
 							     2, 2,
 							     0, notify_length,
-							     &mdev->notify_len);
+							     &mdev->notify_len,
+							     &mdev->notify_pa);
 		if (!mdev->notify_base)
 			goto err_map_notify;
 	} else {
@@ -319,7 +324,8 @@ int vp_modern_probe(struct virtio_pci_modern_device *mdev)
 	if (device) {
 		mdev->device = vp_modern_map_capability(mdev, device, 0, 4,
 							0, PAGE_SIZE,
-							&mdev->device_len);
+							&mdev->device_len,
+							NULL);
 		if (!mdev->device)
 			goto err_map_device;
 	}
@@ -595,11 +601,12 @@ static u16 vp_modern_get_queue_notify_off(struct virtio_pci_modern_device *mdev,
  * specific virtqueue
  * @mdev: the modern virtio-pci device
  * @index: the queue index
+ * @pa: the pointer to the physical address of the nofity area
  *
  * Returns the address of the notification area
  */
 void *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
-			      u16 index)
+			      u16 index, resource_size_t *pa)
 {
 	u16 off = vp_modern_get_queue_notify_off(mdev, index);
 
@@ -614,13 +621,16 @@ void *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
 				 index, mdev->notify_len);
 			return NULL;
 		}
+		if (pa)
+			*pa = mdev->notify_pa +
+			      off * mdev->notify_offset_multiplier;
 		return (void __force *)mdev->notify_base +
 			off * mdev->notify_offset_multiplier;
 	} else {
 		return (void __force *)vp_modern_map_capability(mdev,
 				       mdev->notify_map_cap, 2, 2,
 				       off * mdev->notify_offset_multiplier, 2,
-				       NULL);
+				       NULL, pa);
 	}
 }
 EXPORT_SYMBOL_GPL(vp_modern_map_vq_notify);
diff --git a/include/linux/virtio_pci_modern.h b/include/linux/virtio_pci_modern.h
index e6e7072413c1..cdfabbefacdf 100644
--- a/include/linux/virtio_pci_modern.h
+++ b/include/linux/virtio_pci_modern.h
@@ -13,6 +13,8 @@ struct virtio_pci_modern_device {
 	void __iomem *device;
 	/* Base of vq notifications (non-legacy mode). */
 	void __iomem *notify_base;
+	/* Physical base of vq notifications */
+	resource_size_t notify_pa;
 	/* Where to read and clear interrupt */
 	u8 __iomem *isr;
 
@@ -100,7 +102,7 @@ u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev,
 			     u16 idx);
 u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev);
 void *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
-                              u16 index);
+                              u16 index, resource_size_t *pa);
 int vp_modern_probe(struct virtio_pci_modern_device *mdev);
 void vp_modern_remove(struct virtio_pci_modern_device *mdev);
 #endif
-- 
cgit v1.2.3


From 526cb8580bc6b9e5bc14cc5d24ecf4633a84cfa1 Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Thu, 15 Apr 2021 03:31:47 -0400
Subject: vp_vdpa: report doorbell address

This patch reports the per vq doorbell location and size to vDPA
bus. Userspace can then map the doorbell via mmap() via vhost-vDPA bus
driver.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210415073147.19331-8-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
---
 drivers/vdpa/virtio_pci/vp_vdpa.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/virtio_pci/vp_vdpa.c b/drivers/vdpa/virtio_pci/vp_vdpa.c
index 98205e54d089..002b928d0ca1 100644
--- a/drivers/vdpa/virtio_pci/vp_vdpa.c
+++ b/drivers/vdpa/virtio_pci/vp_vdpa.c
@@ -26,6 +26,7 @@ struct vp_vring {
 	void __iomem *notify;
 	char msix_name[VP_VDPA_NAME_SIZE];
 	struct vdpa_callback cb;
+	resource_size_t notify_pa;
 	int irq;
 };
 
@@ -336,6 +337,19 @@ static void vp_vdpa_set_config_cb(struct vdpa_device *vdpa,
 	vp_vdpa->config_cb = *cb;
 }
 
+static struct vdpa_notification_area
+vp_vdpa_get_vq_notification(struct vdpa_device *vdpa, u16 qid)
+{
+	struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+	struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev;
+	struct vdpa_notification_area notify;
+
+	notify.addr = vp_vdpa->vring[qid].notify_pa;
+	notify.size = mdev->notify_offset_multiplier;
+
+	return notify;
+}
+
 static const struct vdpa_config_ops vp_vdpa_ops = {
 	.get_features	= vp_vdpa_get_features,
 	.set_features	= vp_vdpa_set_features,
@@ -343,6 +357,7 @@ static const struct vdpa_config_ops vp_vdpa_ops = {
 	.set_status	= vp_vdpa_set_status,
 	.get_vq_num_max	= vp_vdpa_get_vq_num_max,
 	.get_vq_state	= vp_vdpa_get_vq_state,
+	.get_vq_notification = vp_vdpa_get_vq_notification,
 	.set_vq_state	= vp_vdpa_set_vq_state,
 	.set_vq_cb	= vp_vdpa_set_vq_cb,
 	.set_vq_ready	= vp_vdpa_set_vq_ready,
@@ -416,7 +431,8 @@ static int vp_vdpa_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	for (i = 0; i < vp_vdpa->queues; i++) {
 		vp_vdpa->vring[i].irq = VIRTIO_MSI_NO_VECTOR;
 		vp_vdpa->vring[i].notify =
-			vp_modern_map_vq_notify(mdev, i, NULL);
+			vp_modern_map_vq_notify(mdev, i,
+						&vp_vdpa->vring[i].notify_pa);
 		if (!vp_vdpa->vring[i].notify) {
 			dev_warn(&pdev->dev, "Fail to map vq notify %d\n", i);
 			goto err;
-- 
cgit v1.2.3


From 3a3e0fad16d40a2aa68ddf7eea4acdf48b22dd44 Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Tue, 13 Apr 2021 17:15:57 +0800
Subject: vhost-vdpa: fix vm_flags for virtqueue doorbell mapping

The virtqueue doorbell is usually implemented via registeres but we
don't provide the necessary vma->flags like VM_PFNMAP. This may cause
several issues e.g when userspace tries to map the doorbell via vhost
IOTLB, kernel may panic due to the page is not backed by page
structure. This patch fixes this by setting the necessary
vm_flags. With this patch, try to map doorbell via IOTLB will fail
with bad address.

Cc: stable@vger.kernel.org
Fixes: ddd89d0a059d ("vhost_vdpa: support doorbell mapping via mmap")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210413091557.29008-1-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vhost/vdpa.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index bfa4c6ef554e..c79d2f2387aa 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -993,6 +993,7 @@ static int vhost_vdpa_mmap(struct file *file, struct vm_area_struct *vma)
 	if (vma->vm_end - vma->vm_start != notify.size)
 		return -ENOTSUPP;
 
+	vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;
 	vma->vm_ops = &vhost_vdpa_vm_ops;
 	return 0;
 }
-- 
cgit v1.2.3


From 0ecb1960788d0ce627e246303a31843c1f496bed Mon Sep 17 00:00:00 2001
From: Zhu Lingshan <lingshan.zhu@intel.com>
Date: Wed, 17 Mar 2021 17:49:27 +0800
Subject: vDPA/ifcvf: get_vendor_id returns a device specific vendor id

In this commit, ifcvf_get_vendor_id() will return
a device specific vendor id of the probed pci device
than a hard code.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210317094933.16417-2-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/ifcvf/ifcvf_main.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index d555a6a5d1ba..f5633ab78952 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -324,7 +324,10 @@ static u32 ifcvf_vdpa_get_device_id(struct vdpa_device *vdpa_dev)
 
 static u32 ifcvf_vdpa_get_vendor_id(struct vdpa_device *vdpa_dev)
 {
-	return IFCVF_SUBSYS_VENDOR_ID;
+	struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
+	struct pci_dev *pdev = adapter->pdev;
+
+	return pdev->subsystem_vendor;
 }
 
 static u32 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
-- 
cgit v1.2.3


From 139c3fd9c9fc52ea5b8a347046993000afe36c06 Mon Sep 17 00:00:00 2001
From: Zhu Lingshan <lingshan.zhu@intel.com>
Date: Wed, 17 Mar 2021 17:49:28 +0800
Subject: vDPA/ifcvf: enable Intel C5000X-PL virtio-net for vDPA

This commit enabled Intel FPGA SmartNIC C5000X-PL virtio-net
for vDPA

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210317094933.16417-3-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/ifcvf/ifcvf_base.h | 5 +++++
 drivers/vdpa/ifcvf/ifcvf_main.c | 5 +++++
 2 files changed, 10 insertions(+)

(limited to 'drivers')

diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
index 64696d63fe07..75d9a8052039 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.h
+++ b/drivers/vdpa/ifcvf/ifcvf_base.h
@@ -23,6 +23,11 @@
 #define IFCVF_SUBSYS_VENDOR_ID	0x8086
 #define IFCVF_SUBSYS_DEVICE_ID	0x001A
 
+#define C5000X_PL_VENDOR_ID		0x1AF4
+#define C5000X_PL_DEVICE_ID		0x1000
+#define C5000X_PL_SUBSYS_VENDOR_ID	0x8086
+#define C5000X_PL_SUBSYS_DEVICE_ID	0x0001
+
 #define IFCVF_SUPPORTED_FEATURES \
 		((1ULL << VIRTIO_NET_F_MAC)			| \
 		 (1ULL << VIRTIO_F_ANY_LAYOUT)			| \
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index f5633ab78952..ded5a0303dbc 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -483,6 +483,11 @@ static struct pci_device_id ifcvf_pci_ids[] = {
 		IFCVF_DEVICE_ID,
 		IFCVF_SUBSYS_VENDOR_ID,
 		IFCVF_SUBSYS_DEVICE_ID) },
+	{ PCI_DEVICE_SUB(C5000X_PL_VENDOR_ID,
+			 C5000X_PL_DEVICE_ID,
+			 C5000X_PL_SUBSYS_VENDOR_ID,
+			 C5000X_PL_SUBSYS_DEVICE_ID) },
+
 	{ 0 },
 };
 MODULE_DEVICE_TABLE(pci, ifcvf_pci_ids);
-- 
cgit v1.2.3


From 51fc387b67cb25416757f7a889bab328cc0faf37 Mon Sep 17 00:00:00 2001
From: Zhu Lingshan <lingshan.zhu@intel.com>
Date: Wed, 17 Mar 2021 17:49:29 +0800
Subject: vDPA/ifcvf: rename original IFCVF dev ids to N3000 ids

IFCVF driver probes multiple types of devices now,
to distinguish the original device driven by IFCVF
from others, it is renamed as "N3000".

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210317094933.16417-4-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/ifcvf/ifcvf_base.h | 8 ++++----
 drivers/vdpa/ifcvf/ifcvf_main.c | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
index 75d9a8052039..794d1505d857 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.h
+++ b/drivers/vdpa/ifcvf/ifcvf_base.h
@@ -18,10 +18,10 @@
 #include <uapi/linux/virtio_config.h>
 #include <uapi/linux/virtio_pci.h>
 
-#define IFCVF_VENDOR_ID		0x1AF4
-#define IFCVF_DEVICE_ID		0x1041
-#define IFCVF_SUBSYS_VENDOR_ID	0x8086
-#define IFCVF_SUBSYS_DEVICE_ID	0x001A
+#define N3000_VENDOR_ID		0x1AF4
+#define N3000_DEVICE_ID		0x1041
+#define N3000_SUBSYS_VENDOR_ID	0x8086
+#define N3000_SUBSYS_DEVICE_ID	0x001A
 
 #define C5000X_PL_VENDOR_ID		0x1AF4
 #define C5000X_PL_DEVICE_ID		0x1000
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index ded5a0303dbc..6e766d5c4f11 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -479,10 +479,10 @@ static void ifcvf_remove(struct pci_dev *pdev)
 }
 
 static struct pci_device_id ifcvf_pci_ids[] = {
-	{ PCI_DEVICE_SUB(IFCVF_VENDOR_ID,
-		IFCVF_DEVICE_ID,
-		IFCVF_SUBSYS_VENDOR_ID,
-		IFCVF_SUBSYS_DEVICE_ID) },
+	{ PCI_DEVICE_SUB(N3000_VENDOR_ID,
+			 N3000_DEVICE_ID,
+			 N3000_SUBSYS_VENDOR_ID,
+			 N3000_SUBSYS_DEVICE_ID) },
 	{ PCI_DEVICE_SUB(C5000X_PL_VENDOR_ID,
 			 C5000X_PL_DEVICE_ID,
 			 C5000X_PL_SUBSYS_VENDOR_ID,
-- 
cgit v1.2.3


From 2f1b305070393151d3997217a4452ef99bdb48cc Mon Sep 17 00:00:00 2001
From: Zhu Lingshan <lingshan.zhu@intel.com>
Date: Wed, 17 Mar 2021 17:49:30 +0800
Subject: vDPA/ifcvf: remove the version number string

This commit removes the version number string, using kernel
version is enough.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210317094933.16417-5-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/ifcvf/ifcvf_main.c | 2 --
 1 file changed, 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index 6e766d5c4f11..d3d42c431e69 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -14,7 +14,6 @@
 #include <linux/sysfs.h>
 #include "ifcvf_base.h"
 
-#define VERSION_STRING  "0.1"
 #define DRIVER_AUTHOR   "Intel Corporation"
 #define IFCVF_DRIVER_NAME       "ifcvf"
 
@@ -502,4 +501,3 @@ static struct pci_driver ifcvf_driver = {
 module_pci_driver(ifcvf_driver);
 
 MODULE_LICENSE("GPL v2");
-MODULE_VERSION(VERSION_STRING);
-- 
cgit v1.2.3


From 69d00d9858c7451a1e3fc556ece211533fb85b64 Mon Sep 17 00:00:00 2001
From: Zhu Lingshan <lingshan.zhu@intel.com>
Date: Wed, 17 Mar 2021 17:49:31 +0800
Subject: vDPA/ifcvf: fetch device feature bits when probe

This commit would read and store device feature
bits when probe.

rename ifcvf_get_features() to ifcvf_get_hw_features(),
it reads and stores features of the probed device.

new ifcvf_get_features() simply returns stored
feature bits.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210317094933.16417-6-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/ifcvf/ifcvf_base.c | 12 ++++++++++--
 drivers/vdpa/ifcvf/ifcvf_base.h |  2 ++
 drivers/vdpa/ifcvf/ifcvf_main.c |  2 ++
 3 files changed, 14 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c
index f2a128e56de5..ea6a78791c9b 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.c
+++ b/drivers/vdpa/ifcvf/ifcvf_base.c
@@ -202,10 +202,11 @@ static void ifcvf_add_status(struct ifcvf_hw *hw, u8 status)
 	ifcvf_get_status(hw);
 }
 
-u64 ifcvf_get_features(struct ifcvf_hw *hw)
+u64 ifcvf_get_hw_features(struct ifcvf_hw *hw)
 {
 	struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg;
 	u32 features_lo, features_hi;
+	u64 features;
 
 	ifc_iowrite32(0, &cfg->device_feature_select);
 	features_lo = ifc_ioread32(&cfg->device_feature);
@@ -213,7 +214,14 @@ u64 ifcvf_get_features(struct ifcvf_hw *hw)
 	ifc_iowrite32(1, &cfg->device_feature_select);
 	features_hi = ifc_ioread32(&cfg->device_feature);
 
-	return ((u64)features_hi << 32) | features_lo;
+	features = ((u64)features_hi << 32) | features_lo;
+
+	return features;
+}
+
+u64 ifcvf_get_features(struct ifcvf_hw *hw)
+{
+	return hw->hw_features;
 }
 
 void ifcvf_read_net_config(struct ifcvf_hw *hw, u64 offset,
diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
index 794d1505d857..dbb8c10aa3b1 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.h
+++ b/drivers/vdpa/ifcvf/ifcvf_base.h
@@ -83,6 +83,7 @@ struct ifcvf_hw {
 	void __iomem *notify_base;
 	u32 notify_off_multiplier;
 	u64 req_features;
+	u64 hw_features;
 	struct virtio_pci_common_cfg __iomem *common_cfg;
 	void __iomem *net_cfg;
 	struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2];
@@ -121,6 +122,7 @@ void ifcvf_set_status(struct ifcvf_hw *hw, u8 status);
 void io_write64_twopart(u64 val, u32 *lo, u32 *hi);
 void ifcvf_reset(struct ifcvf_hw *hw);
 u64 ifcvf_get_features(struct ifcvf_hw *hw);
+u64 ifcvf_get_hw_features(struct ifcvf_hw *hw);
 u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid);
 int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num);
 struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw);
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index d3d42c431e69..fae664d92aff 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -457,6 +457,8 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++)
 		vf->vring[i].irq = -EINVAL;
 
+	vf->hw_features = ifcvf_get_hw_features(vf);
+
 	ret = vdpa_register_device(&adapter->vdpa, IFCVF_MAX_QUEUE_PAIRS * 2);
 	if (ret) {
 		IFCVF_ERR(pdev, "Failed to register ifcvf to vdpa bus");
-- 
cgit v1.2.3


From 1d895a68085b28d098893570b024229aacc9a057 Mon Sep 17 00:00:00 2001
From: Zhu Lingshan <lingshan.zhu@intel.com>
Date: Wed, 17 Mar 2021 17:49:32 +0800
Subject: vDPA/ifcvf: verify mandatory feature bits for vDPA

vDPA requres VIRTIO_F_ACCESS_PLATFORM as a must, this commit
examines this when set features.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210317094933.16417-7-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/ifcvf/ifcvf_base.c | 12 ++++++++++++
 drivers/vdpa/ifcvf/ifcvf_base.h |  1 +
 drivers/vdpa/ifcvf/ifcvf_main.c |  5 +++++
 3 files changed, 18 insertions(+)

(limited to 'drivers')

diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c
index ea6a78791c9b..1a661ab45af5 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.c
+++ b/drivers/vdpa/ifcvf/ifcvf_base.c
@@ -224,6 +224,18 @@ u64 ifcvf_get_features(struct ifcvf_hw *hw)
 	return hw->hw_features;
 }
 
+int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features)
+{
+	struct ifcvf_adapter *ifcvf = vf_to_adapter(hw);
+
+	if (!(features & BIT_ULL(VIRTIO_F_ACCESS_PLATFORM)) && features) {
+		IFCVF_ERR(ifcvf->pdev, "VIRTIO_F_ACCESS_PLATFORM is not negotiated\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 void ifcvf_read_net_config(struct ifcvf_hw *hw, u64 offset,
 			   void *dst, int length)
 {
diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
index dbb8c10aa3b1..f77239fc1644 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.h
+++ b/drivers/vdpa/ifcvf/ifcvf_base.h
@@ -123,6 +123,7 @@ void io_write64_twopart(u64 val, u32 *lo, u32 *hi);
 void ifcvf_reset(struct ifcvf_hw *hw);
 u64 ifcvf_get_features(struct ifcvf_hw *hw);
 u64 ifcvf_get_hw_features(struct ifcvf_hw *hw);
+int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features);
 u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid);
 int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num);
 struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw);
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index fae664d92aff..8bff4efbe749 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -179,6 +179,11 @@ static u64 ifcvf_vdpa_get_features(struct vdpa_device *vdpa_dev)
 static int ifcvf_vdpa_set_features(struct vdpa_device *vdpa_dev, u64 features)
 {
 	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+	int ret;
+
+	ret = ifcvf_verify_min_features(vf, features);
+	if (ret)
+		return ret;
 
 	vf->req_features = features;
 
-- 
cgit v1.2.3


From e8ef6124959a7c4004ef95b1b17cfa9b2ca582bd Mon Sep 17 00:00:00 2001
From: Zhu Lingshan <lingshan.zhu@intel.com>
Date: Wed, 17 Mar 2021 17:49:33 +0800
Subject: vDPA/ifcvf: deduce VIRTIO device ID from pdev ids

This commit deduces the VIRTIO device ID of a probed
device from its pdev device ids.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Link: https://lore.kernel.org/r/20210317094933.16417-8-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
 drivers/vdpa/ifcvf/ifcvf_base.h |  1 +
 drivers/vdpa/ifcvf/ifcvf_main.c | 14 +++++++++++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
index f77239fc1644..b2eeb16b9c2c 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.h
+++ b/drivers/vdpa/ifcvf/ifcvf_base.h
@@ -127,4 +127,5 @@ int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features);
 u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid);
 int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num);
 struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw);
+int ifcvf_probed_virtio_net(struct ifcvf_hw *hw);
 #endif /* _IFCVF_H_ */
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index 8bff4efbe749..a16753f1de5b 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -323,7 +323,19 @@ static u32 ifcvf_vdpa_get_generation(struct vdpa_device *vdpa_dev)
 
 static u32 ifcvf_vdpa_get_device_id(struct vdpa_device *vdpa_dev)
 {
-	return VIRTIO_ID_NET;
+	struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
+	struct pci_dev *pdev = adapter->pdev;
+	u32 ret = -ENODEV;
+
+	if (pdev->device < 0x1000 || pdev->device > 0x107f)
+		return ret;
+
+	if (pdev->device < 0x1040)
+		ret =  pdev->subsystem_device;
+	else
+		ret =  pdev->device - 0x1040;
+
+	return ret;
 }
 
 static u32 ifcvf_vdpa_get_vendor_id(struct vdpa_device *vdpa_dev)
-- 
cgit v1.2.3


From 4080fc1067501707b9693b8003feae7d50d14e35 Mon Sep 17 00:00:00 2001
From: Stefano Garzarella <sgarzare@redhat.com>
Date: Mon, 15 Mar 2021 17:34:37 +0100
Subject: vdpa_sim: use iova module to allocate IOVA addresses

The identical mapping used until now created issues when mapping
different virtual pages with the same physical address.
To solve this issue, we can use the iova module, to handle the IOVA
allocation.
For simplicity we use an IOVA allocator with byte granularity.

We add two new functions, vdpasim_map_range() and vdpasim_unmap_range(),
to handle the IOVA allocation and the registration into the IOMMU/IOTLB.
These functions are used by dma_map_ops callbacks.

Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210315163450.254396-2-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/Kconfig             |   1 +
 drivers/vdpa/vdpa_sim/vdpa_sim.c | 108 ++++++++++++++++++++++++---------------
 drivers/vdpa/vdpa_sim/vdpa_sim.h |   2 +
 3 files changed, 69 insertions(+), 42 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/Kconfig b/drivers/vdpa/Kconfig
index a245809c99d0..6e82a0e228c2 100644
--- a/drivers/vdpa/Kconfig
+++ b/drivers/vdpa/Kconfig
@@ -14,6 +14,7 @@ config VDPA_SIM
 	depends on RUNTIME_TESTING_MENU && HAS_DMA
 	select DMA_OPS
 	select VHOST_RING
+	select IOMMU_IOVA
 	help
 	  Enable this module to support vDPA device simulators. These devices
 	  are used for testing, prototyping and development of vDPA.
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 5b6b2f87d40c..fc2ec9599753 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -17,6 +17,7 @@
 #include <linux/vringh.h>
 #include <linux/vdpa.h>
 #include <linux/vhost_iotlb.h>
+#include <linux/iova.h>
 
 #include "vdpa_sim.h"
 
@@ -128,30 +129,57 @@ static int dir_to_perm(enum dma_data_direction dir)
 	return perm;
 }
 
+static dma_addr_t vdpasim_map_range(struct vdpasim *vdpasim, phys_addr_t paddr,
+				    size_t size, unsigned int perm)
+{
+	struct iova *iova;
+	dma_addr_t dma_addr;
+	int ret;
+
+	/* We set the limit_pfn to the maximum (ULONG_MAX - 1) */
+	iova = alloc_iova(&vdpasim->iova, size, ULONG_MAX - 1, true);
+	if (!iova)
+		return DMA_MAPPING_ERROR;
+
+	dma_addr = iova_dma_addr(&vdpasim->iova, iova);
+
+	spin_lock(&vdpasim->iommu_lock);
+	ret = vhost_iotlb_add_range(vdpasim->iommu, (u64)dma_addr,
+				    (u64)dma_addr + size - 1, (u64)paddr, perm);
+	spin_unlock(&vdpasim->iommu_lock);
+
+	if (ret) {
+		__free_iova(&vdpasim->iova, iova);
+		return DMA_MAPPING_ERROR;
+	}
+
+	return dma_addr;
+}
+
+static void vdpasim_unmap_range(struct vdpasim *vdpasim, dma_addr_t dma_addr,
+				size_t size)
+{
+	spin_lock(&vdpasim->iommu_lock);
+	vhost_iotlb_del_range(vdpasim->iommu, (u64)dma_addr,
+			      (u64)dma_addr + size - 1);
+	spin_unlock(&vdpasim->iommu_lock);
+
+	free_iova(&vdpasim->iova, iova_pfn(&vdpasim->iova, dma_addr));
+}
+
 static dma_addr_t vdpasim_map_page(struct device *dev, struct page *page,
 				   unsigned long offset, size_t size,
 				   enum dma_data_direction dir,
 				   unsigned long attrs)
 {
 	struct vdpasim *vdpasim = dev_to_sim(dev);
-	struct vhost_iotlb *iommu = vdpasim->iommu;
-	u64 pa = (page_to_pfn(page) << PAGE_SHIFT) + offset;
-	int ret, perm = dir_to_perm(dir);
+	phys_addr_t paddr = page_to_phys(page) + offset;
+	int perm = dir_to_perm(dir);
 
 	if (perm < 0)
 		return DMA_MAPPING_ERROR;
 
-	/* For simplicity, use identical mapping to avoid e.g iova
-	 * allocator.
-	 */
-	spin_lock(&vdpasim->iommu_lock);
-	ret = vhost_iotlb_add_range(iommu, pa, pa + size - 1,
-				    pa, dir_to_perm(dir));
-	spin_unlock(&vdpasim->iommu_lock);
-	if (ret)
-		return DMA_MAPPING_ERROR;
-
-	return (dma_addr_t)(pa);
+	return vdpasim_map_range(vdpasim, paddr, size, perm);
 }
 
 static void vdpasim_unmap_page(struct device *dev, dma_addr_t dma_addr,
@@ -159,12 +187,8 @@ static void vdpasim_unmap_page(struct device *dev, dma_addr_t dma_addr,
 			       unsigned long attrs)
 {
 	struct vdpasim *vdpasim = dev_to_sim(dev);
-	struct vhost_iotlb *iommu = vdpasim->iommu;
 
-	spin_lock(&vdpasim->iommu_lock);
-	vhost_iotlb_del_range(iommu, (u64)dma_addr,
-			      (u64)dma_addr + size - 1);
-	spin_unlock(&vdpasim->iommu_lock);
+	vdpasim_unmap_range(vdpasim, dma_addr, size);
 }
 
 static void *vdpasim_alloc_coherent(struct device *dev, size_t size,
@@ -172,27 +196,22 @@ static void *vdpasim_alloc_coherent(struct device *dev, size_t size,
 				    unsigned long attrs)
 {
 	struct vdpasim *vdpasim = dev_to_sim(dev);
-	struct vhost_iotlb *iommu = vdpasim->iommu;
-	void *addr = kmalloc(size, flag);
-	int ret;
+	phys_addr_t paddr;
+	void *addr;
 
-	spin_lock(&vdpasim->iommu_lock);
+	addr = kmalloc(size, flag);
 	if (!addr) {
 		*dma_addr = DMA_MAPPING_ERROR;
-	} else {
-		u64 pa = virt_to_phys(addr);
-
-		ret = vhost_iotlb_add_range(iommu, (u64)pa,
-					    (u64)pa + size - 1,
-					    pa, VHOST_MAP_RW);
-		if (ret) {
-			*dma_addr = DMA_MAPPING_ERROR;
-			kfree(addr);
-			addr = NULL;
-		} else
-			*dma_addr = (dma_addr_t)pa;
+		return NULL;
+	}
+
+	paddr = virt_to_phys(addr);
+
+	*dma_addr = vdpasim_map_range(vdpasim, paddr, size, VHOST_MAP_RW);
+	if (*dma_addr == DMA_MAPPING_ERROR) {
+		kfree(addr);
+		return NULL;
 	}
-	spin_unlock(&vdpasim->iommu_lock);
 
 	return addr;
 }
@@ -202,14 +221,10 @@ static void vdpasim_free_coherent(struct device *dev, size_t size,
 				  unsigned long attrs)
 {
 	struct vdpasim *vdpasim = dev_to_sim(dev);
-	struct vhost_iotlb *iommu = vdpasim->iommu;
 
-	spin_lock(&vdpasim->iommu_lock);
-	vhost_iotlb_del_range(iommu, (u64)dma_addr,
-			      (u64)dma_addr + size - 1);
-	spin_unlock(&vdpasim->iommu_lock);
+	vdpasim_unmap_range(vdpasim, dma_addr, size);
 
-	kfree(phys_to_virt((uintptr_t)dma_addr));
+	kfree(vaddr);
 }
 
 static const struct dma_map_ops vdpasim_dma_ops = {
@@ -271,6 +286,13 @@ struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr)
 	for (i = 0; i < dev_attr->nvqs; i++)
 		vringh_set_iotlb(&vdpasim->vqs[i].vring, vdpasim->iommu);
 
+	ret = iova_cache_get();
+	if (ret)
+		goto err_iommu;
+
+	/* For simplicity we use an IOVA allocator with byte granularity */
+	init_iova_domain(&vdpasim->iova, 1, 0);
+
 	vdpasim->vdpa.dma_dev = dev;
 
 	return vdpasim;
@@ -541,6 +563,8 @@ static void vdpasim_free(struct vdpa_device *vdpa)
 	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 
 	cancel_work_sync(&vdpasim->work);
+	put_iova_domain(&vdpasim->iova);
+	iova_cache_put();
 	kvfree(vdpasim->buffer);
 	if (vdpasim->iommu)
 		vhost_iotlb_free(vdpasim->iommu);
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.h b/drivers/vdpa/vdpa_sim/vdpa_sim.h
index 6d75444f9948..cd58e888bcf3 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.h
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.h
@@ -6,6 +6,7 @@
 #ifndef _VDPA_SIM_H
 #define _VDPA_SIM_H
 
+#include <linux/iova.h>
 #include <linux/vringh.h>
 #include <linux/vdpa.h>
 #include <linux/virtio_byteorder.h>
@@ -57,6 +58,7 @@ struct vdpasim {
 	/* virtio config according to device type */
 	void *config;
 	struct vhost_iotlb *iommu;
+	struct iova_domain iova;
 	void *buffer;
 	u32 status;
 	u32 generation;
-- 
cgit v1.2.3


From f53d9910d009bc015b42d88114e2d86a93b0e6b7 Mon Sep 17 00:00:00 2001
From: Stefano Garzarella <sgarzare@redhat.com>
Date: Mon, 15 Mar 2021 17:34:38 +0100
Subject: vringh: add 'iotlb_lock' to synchronize iotlb accesses

Usually iotlb accesses are synchronized with a spinlock.
Let's request it as a new parameter in vringh_set_iotlb() and
hold it when we navigate the iotlb in iotlb_translate() to avoid
race conditions with any new additions/deletions of ranges from
the ioltb.

Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210315163450.254396-3-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/vdpa_sim/vdpa_sim.c | 3 ++-
 drivers/vhost/vringh.c           | 9 ++++++++-
 include/linux/vringh.h           | 6 +++++-
 3 files changed, 15 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index fc2ec9599753..a92c08880098 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -284,7 +284,8 @@ struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr)
 		goto err_iommu;
 
 	for (i = 0; i < dev_attr->nvqs; i++)
-		vringh_set_iotlb(&vdpasim->vqs[i].vring, vdpasim->iommu);
+		vringh_set_iotlb(&vdpasim->vqs[i].vring, vdpasim->iommu,
+				 &vdpasim->iommu_lock);
 
 	ret = iova_cache_get();
 	if (ret)
diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c
index 85d85faba058..f68122705719 100644
--- a/drivers/vhost/vringh.c
+++ b/drivers/vhost/vringh.c
@@ -1074,6 +1074,8 @@ static int iotlb_translate(const struct vringh *vrh,
 	int ret = 0;
 	u64 s = 0;
 
+	spin_lock(vrh->iotlb_lock);
+
 	while (len > s) {
 		u64 size, pa, pfn;
 
@@ -1103,6 +1105,8 @@ static int iotlb_translate(const struct vringh *vrh,
 		++ret;
 	}
 
+	spin_unlock(vrh->iotlb_lock);
+
 	return ret;
 }
 
@@ -1262,10 +1266,13 @@ EXPORT_SYMBOL(vringh_init_iotlb);
  * vringh_set_iotlb - initialize a vringh for a ring with IOTLB.
  * @vrh: the vring
  * @iotlb: iotlb associated with this vring
+ * @iotlb_lock: spinlock to synchronize the iotlb accesses
  */
-void vringh_set_iotlb(struct vringh *vrh, struct vhost_iotlb *iotlb)
+void vringh_set_iotlb(struct vringh *vrh, struct vhost_iotlb *iotlb,
+		      spinlock_t *iotlb_lock)
 {
 	vrh->iotlb = iotlb;
+	vrh->iotlb_lock = iotlb_lock;
 }
 EXPORT_SYMBOL(vringh_set_iotlb);
 
diff --git a/include/linux/vringh.h b/include/linux/vringh.h
index 59bd50f99291..9c077863c8f6 100644
--- a/include/linux/vringh.h
+++ b/include/linux/vringh.h
@@ -46,6 +46,9 @@ struct vringh {
 	/* IOTLB for this vring */
 	struct vhost_iotlb *iotlb;
 
+	/* spinlock to synchronize IOTLB accesses */
+	spinlock_t *iotlb_lock;
+
 	/* The function to call to notify the guest about added buffers */
 	void (*notify)(struct vringh *);
 };
@@ -258,7 +261,8 @@ static inline __virtio64 cpu_to_vringh64(const struct vringh *vrh, u64 val)
 
 #if IS_REACHABLE(CONFIG_VHOST_IOTLB)
 
-void vringh_set_iotlb(struct vringh *vrh, struct vhost_iotlb *iotlb);
+void vringh_set_iotlb(struct vringh *vrh, struct vhost_iotlb *iotlb,
+		      spinlock_t *iotlb_lock);
 
 int vringh_init_iotlb(struct vringh *vrh, u64 features,
 		      unsigned int num, bool weak_barriers,
-- 
cgit v1.2.3


From bbc2c372a83d74d5499ad21d0ade2b71f5bde620 Mon Sep 17 00:00:00 2001
From: Stefano Garzarella <sgarzare@redhat.com>
Date: Mon, 15 Mar 2021 17:34:39 +0100
Subject: vringh: reset kiov 'consumed' field in __vringh_iov()

__vringh_iov() overwrites the contents of riov and wiov, in fact it
resets the 'i' and 'used' fields, but also the 'consumed' field should
be reset to avoid an inconsistent state.

Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210315163450.254396-4-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vhost/vringh.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c
index f68122705719..bee63d68201a 100644
--- a/drivers/vhost/vringh.c
+++ b/drivers/vhost/vringh.c
@@ -290,9 +290,9 @@ __vringh_iov(struct vringh *vrh, u16 i,
 		return -EINVAL;
 
 	if (riov)
-		riov->i = riov->used = 0;
+		riov->i = riov->used = riov->consumed = 0;
 	if (wiov)
-		wiov->i = wiov->used = 0;
+		wiov->i = wiov->used = wiov->consumed = 0;
 
 	for (;;) {
 		void *addr;
-- 
cgit v1.2.3


From 69c13c58bd10f036d6e697e664948952e61acfb1 Mon Sep 17 00:00:00 2001
From: Stefano Garzarella <sgarzare@redhat.com>
Date: Mon, 15 Mar 2021 17:34:40 +0100
Subject: vringh: explain more about cleaning riov and wiov

riov and wiov can be reused with subsequent calls of vringh_getdesc_*().

Let's add a paragraph in the documentation of these functions to better
explain when riov and wiov need to be cleaned up.

Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210315163450.254396-5-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vhost/vringh.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c
index bee63d68201a..2a88e087afd8 100644
--- a/drivers/vhost/vringh.c
+++ b/drivers/vhost/vringh.c
@@ -662,7 +662,10 @@ EXPORT_SYMBOL(vringh_init_user);
  * *head will be vrh->vring.num.  You may be able to ignore an invalid
  * descriptor, but there's not much you can do with an invalid ring.
  *
- * Note that you may need to clean up riov and wiov, even on error!
+ * Note that you can reuse riov and wiov with subsequent calls. Content is
+ * overwritten and memory reallocated if more space is needed.
+ * When you don't have to use riov and wiov anymore, you should clean up them
+ * calling vringh_iov_cleanup() to release the memory, even on error!
  */
 int vringh_getdesc_user(struct vringh *vrh,
 			struct vringh_iov *riov,
@@ -932,7 +935,10 @@ EXPORT_SYMBOL(vringh_init_kern);
  * *head will be vrh->vring.num.  You may be able to ignore an invalid
  * descriptor, but there's not much you can do with an invalid ring.
  *
- * Note that you may need to clean up riov and wiov, even on error!
+ * Note that you can reuse riov and wiov with subsequent calls. Content is
+ * overwritten and memory reallocated if more space is needed.
+ * When you don't have to use riov and wiov anymore, you should clean up them
+ * calling vringh_kiov_cleanup() to release the memory, even on error!
  */
 int vringh_getdesc_kern(struct vringh *vrh,
 			struct vringh_kiov *riov,
@@ -1292,7 +1298,10 @@ EXPORT_SYMBOL(vringh_set_iotlb);
  * *head will be vrh->vring.num.  You may be able to ignore an invalid
  * descriptor, but there's not much you can do with an invalid ring.
  *
- * Note that you may need to clean up riov and wiov, even on error!
+ * Note that you can reuse riov and wiov with subsequent calls. Content is
+ * overwritten and memory reallocated if more space is needed.
+ * When you don't have to use riov and wiov anymore, you should clean up them
+ * calling vringh_kiov_cleanup() to release the memory, even on error!
  */
 int vringh_getdesc_iotlb(struct vringh *vrh,
 			 struct vringh_kiov *riov,
-- 
cgit v1.2.3


From b8c06ad4d67db56ed6bdfb685c134da74e92a2c7 Mon Sep 17 00:00:00 2001
From: Stefano Garzarella <sgarzare@redhat.com>
Date: Mon, 15 Mar 2021 17:34:41 +0100
Subject: vringh: implement vringh_kiov_advance()

In some cases, it may be useful to provide a way to skip a number
of bytes in a vringh_kiov.

Let's implement vringh_kiov_advance() for this purpose, reusing the
code from vringh_iov_xfer().
We replace that code calling the new vringh_kiov_advance().

Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210315163450.254396-6-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vhost/vringh.c | 41 +++++++++++++++++++++++++++++------------
 include/linux/vringh.h |  2 ++
 2 files changed, 31 insertions(+), 12 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c
index 2a88e087afd8..4af8fa259d65 100644
--- a/drivers/vhost/vringh.c
+++ b/drivers/vhost/vringh.c
@@ -75,6 +75,34 @@ static inline int __vringh_get_head(const struct vringh *vrh,
 	return head;
 }
 
+/**
+ * vringh_kiov_advance - skip bytes from vring_kiov
+ * @iov: an iov passed to vringh_getdesc_*() (updated as we consume)
+ * @len: the maximum length to advance
+ */
+void vringh_kiov_advance(struct vringh_kiov *iov, size_t len)
+{
+	while (len && iov->i < iov->used) {
+		size_t partlen = min(iov->iov[iov->i].iov_len, len);
+
+		iov->consumed += partlen;
+		iov->iov[iov->i].iov_len -= partlen;
+		iov->iov[iov->i].iov_base += partlen;
+
+		if (!iov->iov[iov->i].iov_len) {
+			/* Fix up old iov element then increment. */
+			iov->iov[iov->i].iov_len = iov->consumed;
+			iov->iov[iov->i].iov_base -= iov->consumed;
+
+			iov->consumed = 0;
+			iov->i++;
+		}
+
+		len -= partlen;
+	}
+}
+EXPORT_SYMBOL(vringh_kiov_advance);
+
 /* Copy some bytes to/from the iovec.  Returns num copied. */
 static inline ssize_t vringh_iov_xfer(struct vringh *vrh,
 				      struct vringh_kiov *iov,
@@ -95,19 +123,8 @@ static inline ssize_t vringh_iov_xfer(struct vringh *vrh,
 		done += partlen;
 		len -= partlen;
 		ptr += partlen;
-		iov->consumed += partlen;
-		iov->iov[iov->i].iov_len -= partlen;
-		iov->iov[iov->i].iov_base += partlen;
 
-		if (!iov->iov[iov->i].iov_len) {
-			/* Fix up old iov element then increment. */
-			iov->iov[iov->i].iov_len = iov->consumed;
-			iov->iov[iov->i].iov_base -= iov->consumed;
-
-			
-			iov->consumed = 0;
-			iov->i++;
-		}
+		vringh_kiov_advance(iov, partlen);
 	}
 	return done;
 }
diff --git a/include/linux/vringh.h b/include/linux/vringh.h
index 9c077863c8f6..755211ebd195 100644
--- a/include/linux/vringh.h
+++ b/include/linux/vringh.h
@@ -199,6 +199,8 @@ static inline void vringh_kiov_cleanup(struct vringh_kiov *kiov)
 	kiov->iov = NULL;
 }
 
+void vringh_kiov_advance(struct vringh_kiov *kiov, size_t len);
+
 int vringh_getdesc_kern(struct vringh *vrh,
 			struct vringh_kiov *riov,
 			struct vringh_kiov *wiov,
-- 
cgit v1.2.3


From bc433e5e0d42d7892dcefb65686c9f1df126923a Mon Sep 17 00:00:00 2001
From: Stefano Garzarella <sgarzare@redhat.com>
Date: Mon, 15 Mar 2021 17:34:43 +0100
Subject: vdpa_sim: cleanup kiovs in vdpasim_free()

vringh_getdesc_iotlb() allocates memory to store the kvec, that
is freed with vringh_kiov_cleanup().

vringh_getdesc_iotlb() is able to reuse a kvec previously allocated,
so in order to avoid to allocate the kvec for each request, we are
not calling vringh_kiov_cleanup() when we finished to handle a
request, but we should call it when we free the entire device.

Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210315163450.254396-8-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/vdpa_sim/vdpa_sim.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'drivers')

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index a92c08880098..14dc2d3d983e 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -562,8 +562,15 @@ static int vdpasim_dma_unmap(struct vdpa_device *vdpa, u64 iova, u64 size)
 static void vdpasim_free(struct vdpa_device *vdpa)
 {
 	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+	int i;
 
 	cancel_work_sync(&vdpasim->work);
+
+	for (i = 0; i < vdpasim->dev_attr.nvqs; i++) {
+		vringh_kiov_cleanup(&vdpasim->vqs[i].out_iov);
+		vringh_kiov_cleanup(&vdpasim->vqs[i].in_iov);
+	}
+
 	put_iova_domain(&vdpasim->iova);
 	iova_cache_put();
 	kvfree(vdpasim->buffer);
-- 
cgit v1.2.3


From 442706f9f94d28fe3c9f188ae4ebbd6b40addffe Mon Sep 17 00:00:00 2001
From: Stefano Garzarella <sgarzare@redhat.com>
Date: Mon, 15 Mar 2021 17:34:44 +0100
Subject: vdpa: add get_config_size callback in vdpa_config_ops

This new callback is used to get the size of the configuration space
of vDPA devices.

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210315163450.254396-9-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
 drivers/vdpa/ifcvf/ifcvf_main.c   | 6 ++++++
 drivers/vdpa/mlx5/net/mlx5_vnet.c | 6 ++++++
 drivers/vdpa/vdpa_sim/vdpa_sim.c  | 9 +++++++++
 drivers/vdpa/virtio_pci/vp_vdpa.c | 8 ++++++++
 include/linux/vdpa.h              | 4 ++++
 5 files changed, 33 insertions(+)

(limited to 'drivers')

diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index a16753f1de5b..44d7586019da 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -351,6 +351,11 @@ static u32 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
 	return IFCVF_QUEUE_ALIGNMENT;
 }
 
+static size_t ifcvf_vdpa_get_config_size(struct vdpa_device *vdpa_dev)
+{
+	return sizeof(struct virtio_net_config);
+}
+
 static void ifcvf_vdpa_get_config(struct vdpa_device *vdpa_dev,
 				  unsigned int offset,
 				  void *buf, unsigned int len)
@@ -411,6 +416,7 @@ static const struct vdpa_config_ops ifc_vdpa_ops = {
 	.get_device_id	= ifcvf_vdpa_get_device_id,
 	.get_vendor_id	= ifcvf_vdpa_get_vendor_id,
 	.get_vq_align	= ifcvf_vdpa_get_vq_align,
+	.get_config_size	= ifcvf_vdpa_get_config_size,
 	.get_config	= ifcvf_vdpa_get_config,
 	.set_config	= ifcvf_vdpa_set_config,
 	.set_config_cb  = ifcvf_vdpa_set_config_cb,
diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 25533db01f5f..189e4385df40 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -1809,6 +1809,11 @@ err_setup:
 	ndev->mvdev.status |= VIRTIO_CONFIG_S_FAILED;
 }
 
+static size_t mlx5_vdpa_get_config_size(struct vdpa_device *vdev)
+{
+	return sizeof(struct virtio_net_config);
+}
+
 static void mlx5_vdpa_get_config(struct vdpa_device *vdev, unsigned int offset, void *buf,
 				 unsigned int len)
 {
@@ -1895,6 +1900,7 @@ static const struct vdpa_config_ops mlx5_vdpa_ops = {
 	.get_vendor_id = mlx5_vdpa_get_vendor_id,
 	.get_status = mlx5_vdpa_get_status,
 	.set_status = mlx5_vdpa_set_status,
+	.get_config_size = mlx5_vdpa_get_config_size,
 	.get_config = mlx5_vdpa_get_config,
 	.set_config = mlx5_vdpa_set_config,
 	.get_generation = mlx5_vdpa_get_generation,
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 14dc2d3d983e..98f793bc9376 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -462,6 +462,13 @@ static void vdpasim_set_status(struct vdpa_device *vdpa, u8 status)
 	spin_unlock(&vdpasim->lock);
 }
 
+static size_t vdpasim_get_config_size(struct vdpa_device *vdpa)
+{
+	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+
+	return vdpasim->dev_attr.config_size;
+}
+
 static void vdpasim_get_config(struct vdpa_device *vdpa, unsigned int offset,
 			     void *buf, unsigned int len)
 {
@@ -598,6 +605,7 @@ static const struct vdpa_config_ops vdpasim_config_ops = {
 	.get_vendor_id          = vdpasim_get_vendor_id,
 	.get_status             = vdpasim_get_status,
 	.set_status             = vdpasim_set_status,
+	.get_config_size        = vdpasim_get_config_size,
 	.get_config             = vdpasim_get_config,
 	.set_config             = vdpasim_set_config,
 	.get_generation         = vdpasim_get_generation,
@@ -625,6 +633,7 @@ static const struct vdpa_config_ops vdpasim_batch_config_ops = {
 	.get_vendor_id          = vdpasim_get_vendor_id,
 	.get_status             = vdpasim_get_status,
 	.set_status             = vdpasim_set_status,
+	.get_config_size        = vdpasim_get_config_size,
 	.get_config             = vdpasim_get_config,
 	.set_config             = vdpasim_set_config,
 	.get_generation         = vdpasim_get_generation,
diff --git a/drivers/vdpa/virtio_pci/vp_vdpa.c b/drivers/vdpa/virtio_pci/vp_vdpa.c
index 002b928d0ca1..c76ebb531212 100644
--- a/drivers/vdpa/virtio_pci/vp_vdpa.c
+++ b/drivers/vdpa/virtio_pci/vp_vdpa.c
@@ -296,6 +296,13 @@ static u32 vp_vdpa_get_vq_align(struct vdpa_device *vdpa)
 	return PAGE_SIZE;
 }
 
+static size_t vp_vdpa_get_config_size(struct vdpa_device *vdpa)
+{
+	struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);
+
+	return mdev->device_len;
+}
+
 static void vp_vdpa_get_config(struct vdpa_device *vdpa,
 			       unsigned int offset,
 			       void *buf, unsigned int len)
@@ -369,6 +376,7 @@ static const struct vdpa_config_ops vp_vdpa_ops = {
 	.get_device_id	= vp_vdpa_get_device_id,
 	.get_vendor_id	= vp_vdpa_get_vendor_id,
 	.get_vq_align	= vp_vdpa_get_vq_align,
+	.get_config_size = vp_vdpa_get_config_size,
 	.get_config	= vp_vdpa_get_config,
 	.set_config	= vp_vdpa_set_config,
 	.set_config_cb  = vp_vdpa_set_config_cb,
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 37b65ca940cf..f311d227aa1b 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -150,6 +150,9 @@ struct vdpa_iova_range {
  * @set_status:			Set the device status
  *				@vdev: vdpa device
  *				@status: virtio device status
+ * @get_config_size:		Get the size of the configuration space
+ *				@vdev: vdpa device
+ *				Returns size_t: configuration size
  * @get_config:			Read from device specific configuration space
  *				@vdev: vdpa device
  *				@offset: offset from the beginning of
@@ -231,6 +234,7 @@ struct vdpa_config_ops {
 	u32 (*get_vendor_id)(struct vdpa_device *vdev);
 	u8 (*get_status)(struct vdpa_device *vdev);
 	void (*set_status)(struct vdpa_device *vdev, u8 status);
+	size_t (*get_config_size)(struct vdpa_device *vdev);
 	void (*get_config)(struct vdpa_device *vdev, unsigned int offset,
 			   void *buf, unsigned int len);
 	void (*set_config)(struct vdpa_device *vdev, unsigned int offset,
-- 
cgit v1.2.3


From d6d8bb92fdde6390037bf9da174ed3ab551c04d7 Mon Sep 17 00:00:00 2001
From: Stefano Garzarella <sgarzare@redhat.com>
Date: Mon, 15 Mar 2021 17:34:45 +0100
Subject: vhost/vdpa: use get_config_size callback in
 vhost_vdpa_config_validate()

Let's use the new 'get_config_size()' callback available instead of
using the 'virtio_id' to get the size of the device config space.

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210315163450.254396-10-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
 drivers/vhost/vdpa.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index c79d2f2387aa..a27756e2f99b 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -188,13 +188,8 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
 static int vhost_vdpa_config_validate(struct vhost_vdpa *v,
 				      struct vhost_vdpa_config *c)
 {
-	long size = 0;
-
-	switch (v->virtio_id) {
-	case VIRTIO_ID_NET:
-		size = sizeof(struct virtio_net_config);
-		break;
-	}
+	struct vdpa_device *vdpa = v->vdpa;
+	long size = vdpa->config->get_config_size(vdpa);
 
 	if (c->len == 0)
 		return -EINVAL;
-- 
cgit v1.2.3


From 9d6d97bff7909910af537fd3903d05338adaaefa Mon Sep 17 00:00:00 2001
From: Xie Yongji <xieyongji@bytedance.com>
Date: Mon, 15 Mar 2021 17:34:46 +0100
Subject: vhost/vdpa: Remove the restriction that only supports virtio-net
 devices

Since the config checks are done by the vDPA drivers, we can remove the
virtio-net restriction and we should be able to support all kinds of
virtio devices.

<linux/virtio_net.h> is not needed anymore, but we need to include
<linux/slab.h> to avoid compilation failures.

Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210315163450.254396-11-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
 drivers/vhost/vdpa.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index a27756e2f99b..a1496c596120 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -16,12 +16,12 @@
 #include <linux/cdev.h>
 #include <linux/device.h>
 #include <linux/mm.h>
+#include <linux/slab.h>
 #include <linux/iommu.h>
 #include <linux/uuid.h>
 #include <linux/vdpa.h>
 #include <linux/nospec.h>
 #include <linux/vhost.h>
-#include <linux/virtio_net.h>
 
 #include "vhost.h"
 
@@ -1023,10 +1023,6 @@ static int vhost_vdpa_probe(struct vdpa_device *vdpa)
 	int minor;
 	int r;
 
-	/* Currently, we only accept the network devices. */
-	if (ops->get_device_id(vdpa) != VIRTIO_ID_NET)
-		return -ENOTSUPP;
-
 	v = kzalloc(sizeof(*v), GFP_KERNEL | __GFP_RETRY_MAYFAIL);
 	if (!v)
 		return -ENOMEM;
-- 
cgit v1.2.3


From 0c853c2c2924464bd86537164ed18d5d953b4909 Mon Sep 17 00:00:00 2001
From: Max Gurtovoy <mgurtovoy@nvidia.com>
Date: Mon, 15 Mar 2021 17:34:47 +0100
Subject: vdpa: add vdpa simulator for block device

This will allow running vDPA for virtio block protocol.

It's a preliminary implementation with a simple request handling:
for each request, only the status (last byte) is set.
It's always set to VIRTIO_BLK_S_OK.

Also input validation is missing and will be added in the next commits.

Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
[sgarzare: various cleanups/fixes]
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210315163450.254396-12-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/Kconfig                 |   7 ++
 drivers/vdpa/vdpa_sim/Makefile       |   1 +
 drivers/vdpa/vdpa_sim/vdpa_sim_blk.c | 145 +++++++++++++++++++++++++++++++++++
 3 files changed, 153 insertions(+)
 create mode 100644 drivers/vdpa/vdpa_sim/vdpa_sim_blk.c

(limited to 'drivers')

diff --git a/drivers/vdpa/Kconfig b/drivers/vdpa/Kconfig
index 6e82a0e228c2..a503c1b2bfd9 100644
--- a/drivers/vdpa/Kconfig
+++ b/drivers/vdpa/Kconfig
@@ -26,6 +26,13 @@ config VDPA_SIM_NET
 	help
 	  vDPA networking device simulator which loops TX traffic back to RX.
 
+config VDPA_SIM_BLOCK
+	tristate "vDPA simulator for block device"
+	depends on VDPA_SIM
+	help
+	  vDPA block device simulator which terminates IO request in a
+	  memory buffer.
+
 config IFCVF
 	tristate "Intel IFC VF vDPA driver"
 	depends on PCI_MSI
diff --git a/drivers/vdpa/vdpa_sim/Makefile b/drivers/vdpa/vdpa_sim/Makefile
index 79d4536d347e..d458103302f2 100644
--- a/drivers/vdpa/vdpa_sim/Makefile
+++ b/drivers/vdpa/vdpa_sim/Makefile
@@ -1,3 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_VDPA_SIM) += vdpa_sim.o
 obj-$(CONFIG_VDPA_SIM_NET) += vdpa_sim_net.o
+obj-$(CONFIG_VDPA_SIM_BLOCK) += vdpa_sim_blk.o
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
new file mode 100644
index 000000000000..64926a70af5e
--- /dev/null
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
@@ -0,0 +1,145 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * VDPA simulator for block device.
+ *
+ * Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/blkdev.h>
+#include <linux/vringh.h>
+#include <linux/vdpa.h>
+#include <uapi/linux/virtio_blk.h>
+
+#include "vdpa_sim.h"
+
+#define DRV_VERSION  "0.1"
+#define DRV_AUTHOR   "Max Gurtovoy <mgurtovoy@nvidia.com>"
+#define DRV_DESC     "vDPA Device Simulator for block device"
+#define DRV_LICENSE  "GPL v2"
+
+#define VDPASIM_BLK_FEATURES	(VDPASIM_FEATURES | \
+				 (1ULL << VIRTIO_BLK_F_SIZE_MAX) | \
+				 (1ULL << VIRTIO_BLK_F_SEG_MAX)  | \
+				 (1ULL << VIRTIO_BLK_F_BLK_SIZE) | \
+				 (1ULL << VIRTIO_BLK_F_TOPOLOGY) | \
+				 (1ULL << VIRTIO_BLK_F_MQ))
+
+#define VDPASIM_BLK_CAPACITY	0x40000
+#define VDPASIM_BLK_SIZE_MAX	0x1000
+#define VDPASIM_BLK_SEG_MAX	32
+#define VDPASIM_BLK_VQ_NUM	1
+
+static struct vdpasim *vdpasim_blk_dev;
+
+static void vdpasim_blk_work(struct work_struct *work)
+{
+	struct vdpasim *vdpasim = container_of(work, struct vdpasim, work);
+	u8 status = VIRTIO_BLK_S_OK;
+	int i;
+
+	spin_lock(&vdpasim->lock);
+
+	if (!(vdpasim->status & VIRTIO_CONFIG_S_DRIVER_OK))
+		goto out;
+
+	for (i = 0; i < VDPASIM_BLK_VQ_NUM; i++) {
+		struct vdpasim_virtqueue *vq = &vdpasim->vqs[i];
+
+		if (!vq->ready)
+			continue;
+
+		while (vringh_getdesc_iotlb(&vq->vring, &vq->out_iov,
+					    &vq->in_iov, &vq->head,
+					    GFP_ATOMIC) > 0) {
+			int write;
+
+			vq->in_iov.i = vq->in_iov.used - 1;
+			write = vringh_iov_push_iotlb(&vq->vring, &vq->in_iov,
+						      &status, 1);
+			if (write <= 0)
+				break;
+
+			/* Make sure data is wrote before advancing index */
+			smp_wmb();
+
+			vringh_complete_iotlb(&vq->vring, vq->head, write);
+
+			/* Make sure used is visible before rasing the interrupt. */
+			smp_wmb();
+
+			local_bh_disable();
+			if (vringh_need_notify_iotlb(&vq->vring) > 0)
+				vringh_notify(&vq->vring);
+			local_bh_enable();
+		}
+	}
+out:
+	spin_unlock(&vdpasim->lock);
+}
+
+static void vdpasim_blk_get_config(struct vdpasim *vdpasim, void *config)
+{
+	struct virtio_blk_config *blk_config = config;
+
+	memset(config, 0, sizeof(struct virtio_blk_config));
+
+	blk_config->capacity = cpu_to_vdpasim64(vdpasim, VDPASIM_BLK_CAPACITY);
+	blk_config->size_max = cpu_to_vdpasim32(vdpasim, VDPASIM_BLK_SIZE_MAX);
+	blk_config->seg_max = cpu_to_vdpasim32(vdpasim, VDPASIM_BLK_SEG_MAX);
+	blk_config->num_queues = cpu_to_vdpasim16(vdpasim, VDPASIM_BLK_VQ_NUM);
+	blk_config->min_io_size = cpu_to_vdpasim16(vdpasim, 1);
+	blk_config->opt_io_size = cpu_to_vdpasim32(vdpasim, 1);
+	blk_config->blk_size = cpu_to_vdpasim32(vdpasim, SECTOR_SIZE);
+}
+
+static int __init vdpasim_blk_init(void)
+{
+	struct vdpasim_dev_attr dev_attr = {};
+	int ret;
+
+	dev_attr.id = VIRTIO_ID_BLOCK;
+	dev_attr.supported_features = VDPASIM_BLK_FEATURES;
+	dev_attr.nvqs = VDPASIM_BLK_VQ_NUM;
+	dev_attr.config_size = sizeof(struct virtio_blk_config);
+	dev_attr.get_config = vdpasim_blk_get_config;
+	dev_attr.work_fn = vdpasim_blk_work;
+	dev_attr.buffer_size = PAGE_SIZE;
+
+	vdpasim_blk_dev = vdpasim_create(&dev_attr);
+	if (IS_ERR(vdpasim_blk_dev)) {
+		ret = PTR_ERR(vdpasim_blk_dev);
+		goto out;
+	}
+
+	ret = vdpa_register_device(&vdpasim_blk_dev->vdpa, VDPASIM_BLK_VQ_NUM);
+	if (ret)
+		goto put_dev;
+
+	return 0;
+
+put_dev:
+	put_device(&vdpasim_blk_dev->vdpa.dev);
+out:
+	return ret;
+}
+
+static void __exit vdpasim_blk_exit(void)
+{
+	struct vdpa_device *vdpa = &vdpasim_blk_dev->vdpa;
+
+	vdpa_unregister_device(vdpa);
+}
+
+module_init(vdpasim_blk_init)
+module_exit(vdpasim_blk_exit)
+
+MODULE_VERSION(DRV_VERSION);
+MODULE_LICENSE(DRV_LICENSE);
+MODULE_AUTHOR(DRV_AUTHOR);
+MODULE_DESCRIPTION(DRV_DESC);
-- 
cgit v1.2.3


From 7d189f617f83f780915b737896a696ff605bd19f Mon Sep 17 00:00:00 2001
From: Stefano Garzarella <sgarzare@redhat.com>
Date: Mon, 15 Mar 2021 17:34:48 +0100
Subject: vdpa_sim_blk: implement ramdisk behaviour

The previous implementation wrote only the status of each request.
This patch implements a more accurate block device simulator,
providing a ramdisk-like behavior and adding input validation.

Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210315163450.254396-13-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/vdpa_sim/vdpa_sim_blk.c | 164 +++++++++++++++++++++++++++++++----
 1 file changed, 146 insertions(+), 18 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
index 64926a70af5e..a31964e3e5a4 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
@@ -3,6 +3,7 @@
  * VDPA simulator for block device.
  *
  * Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2021, Red Hat Inc. All rights reserved.
  *
  */
 
@@ -14,6 +15,7 @@
 #include <linux/blkdev.h>
 #include <linux/vringh.h>
 #include <linux/vdpa.h>
+#include <linux/blkdev.h>
 #include <uapi/linux/virtio_blk.h>
 
 #include "vdpa_sim.h"
@@ -37,10 +39,151 @@
 
 static struct vdpasim *vdpasim_blk_dev;
 
+static bool vdpasim_blk_check_range(u64 start_sector, size_t range_size)
+{
+	u64 range_sectors = range_size >> SECTOR_SHIFT;
+
+	if (range_size > VDPASIM_BLK_SIZE_MAX * VDPASIM_BLK_SEG_MAX)
+		return false;
+
+	if (start_sector > VDPASIM_BLK_CAPACITY)
+		return false;
+
+	if (range_sectors > VDPASIM_BLK_CAPACITY - start_sector)
+		return false;
+
+	return true;
+}
+
+/* Returns 'true' if the request is handled (with or without an I/O error)
+ * and the status is correctly written in the last byte of the 'in iov',
+ * 'false' otherwise.
+ */
+static bool vdpasim_blk_handle_req(struct vdpasim *vdpasim,
+				   struct vdpasim_virtqueue *vq)
+{
+	size_t pushed = 0, to_pull, to_push;
+	struct virtio_blk_outhdr hdr;
+	ssize_t bytes;
+	loff_t offset;
+	u64 sector;
+	u8 status;
+	u32 type;
+	int ret;
+
+	ret = vringh_getdesc_iotlb(&vq->vring, &vq->out_iov, &vq->in_iov,
+				   &vq->head, GFP_ATOMIC);
+	if (ret != 1)
+		return false;
+
+	if (vq->out_iov.used < 1 || vq->in_iov.used < 1) {
+		dev_err(&vdpasim->vdpa.dev, "missing headers - out_iov: %u in_iov %u\n",
+			vq->out_iov.used, vq->in_iov.used);
+		return false;
+	}
+
+	if (vq->in_iov.iov[vq->in_iov.used - 1].iov_len < 1) {
+		dev_err(&vdpasim->vdpa.dev, "request in header too short\n");
+		return false;
+	}
+
+	/* The last byte is the status and we checked if the last iov has
+	 * enough room for it.
+	 */
+	to_push = vringh_kiov_length(&vq->in_iov) - 1;
+
+	to_pull = vringh_kiov_length(&vq->out_iov);
+
+	bytes = vringh_iov_pull_iotlb(&vq->vring, &vq->out_iov, &hdr,
+				      sizeof(hdr));
+	if (bytes != sizeof(hdr)) {
+		dev_err(&vdpasim->vdpa.dev, "request out header too short\n");
+		return false;
+	}
+
+	to_pull -= bytes;
+
+	type = vdpasim32_to_cpu(vdpasim, hdr.type);
+	sector = vdpasim64_to_cpu(vdpasim, hdr.sector);
+	offset = sector << SECTOR_SHIFT;
+	status = VIRTIO_BLK_S_OK;
+
+	switch (type) {
+	case VIRTIO_BLK_T_IN:
+		if (!vdpasim_blk_check_range(sector, to_push)) {
+			dev_err(&vdpasim->vdpa.dev,
+				"reading over the capacity - offset: 0x%llx len: 0x%zx\n",
+				offset, to_push);
+			status = VIRTIO_BLK_S_IOERR;
+			break;
+		}
+
+		bytes = vringh_iov_push_iotlb(&vq->vring, &vq->in_iov,
+					      vdpasim->buffer + offset,
+					      to_push);
+		if (bytes < 0) {
+			dev_err(&vdpasim->vdpa.dev,
+				"vringh_iov_push_iotlb() error: %zd offset: 0x%llx len: 0x%zx\n",
+				bytes, offset, to_push);
+			status = VIRTIO_BLK_S_IOERR;
+			break;
+		}
+
+		pushed += bytes;
+		break;
+
+	case VIRTIO_BLK_T_OUT:
+		if (!vdpasim_blk_check_range(sector, to_pull)) {
+			dev_err(&vdpasim->vdpa.dev,
+				"writing over the capacity - offset: 0x%llx len: 0x%zx\n",
+				offset, to_pull);
+			status = VIRTIO_BLK_S_IOERR;
+			break;
+		}
+
+		bytes = vringh_iov_pull_iotlb(&vq->vring, &vq->out_iov,
+					      vdpasim->buffer + offset,
+					      to_pull);
+		if (bytes < 0) {
+			dev_err(&vdpasim->vdpa.dev,
+				"vringh_iov_pull_iotlb() error: %zd offset: 0x%llx len: 0x%zx\n",
+				bytes, offset, to_pull);
+			status = VIRTIO_BLK_S_IOERR;
+			break;
+		}
+		break;
+
+	default:
+		dev_warn(&vdpasim->vdpa.dev,
+			 "Unsupported request type %d\n", type);
+		status = VIRTIO_BLK_S_IOERR;
+		break;
+	}
+
+	/* If some operations fail, we need to skip the remaining bytes
+	 * to put the status in the last byte
+	 */
+	if (to_push - pushed > 0)
+		vringh_kiov_advance(&vq->in_iov, to_push - pushed);
+
+	/* Last byte is the status */
+	bytes = vringh_iov_push_iotlb(&vq->vring, &vq->in_iov, &status, 1);
+	if (bytes != 1)
+		return false;
+
+	pushed += bytes;
+
+	/* Make sure data is wrote before advancing index */
+	smp_wmb();
+
+	vringh_complete_iotlb(&vq->vring, vq->head, pushed);
+
+	return true;
+}
+
 static void vdpasim_blk_work(struct work_struct *work)
 {
 	struct vdpasim *vdpasim = container_of(work, struct vdpasim, work);
-	u8 status = VIRTIO_BLK_S_OK;
 	int i;
 
 	spin_lock(&vdpasim->lock);
@@ -54,22 +197,7 @@ static void vdpasim_blk_work(struct work_struct *work)
 		if (!vq->ready)
 			continue;
 
-		while (vringh_getdesc_iotlb(&vq->vring, &vq->out_iov,
-					    &vq->in_iov, &vq->head,
-					    GFP_ATOMIC) > 0) {
-			int write;
-
-			vq->in_iov.i = vq->in_iov.used - 1;
-			write = vringh_iov_push_iotlb(&vq->vring, &vq->in_iov,
-						      &status, 1);
-			if (write <= 0)
-				break;
-
-			/* Make sure data is wrote before advancing index */
-			smp_wmb();
-
-			vringh_complete_iotlb(&vq->vring, vq->head, write);
-
+		while (vdpasim_blk_handle_req(vdpasim, vq)) {
 			/* Make sure used is visible before rasing the interrupt. */
 			smp_wmb();
 
@@ -109,7 +237,7 @@ static int __init vdpasim_blk_init(void)
 	dev_attr.config_size = sizeof(struct virtio_blk_config);
 	dev_attr.get_config = vdpasim_blk_get_config;
 	dev_attr.work_fn = vdpasim_blk_work;
-	dev_attr.buffer_size = PAGE_SIZE;
+	dev_attr.buffer_size = VDPASIM_BLK_CAPACITY << SECTOR_SHIFT;
 
 	vdpasim_blk_dev = vdpasim_create(&dev_attr);
 	if (IS_ERR(vdpasim_blk_dev)) {
-- 
cgit v1.2.3


From e6fa605227071620c11014efbc2930029e1673b9 Mon Sep 17 00:00:00 2001
From: Stefano Garzarella <sgarzare@redhat.com>
Date: Mon, 15 Mar 2021 17:34:49 +0100
Subject: vdpa_sim_blk: handle VIRTIO_BLK_T_GET_ID

Handle VIRTIO_BLK_T_GET_ID request, always answering the
"vdpa_blk_sim" string.

Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210315163450.254396-14-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/vdpa_sim/vdpa_sim_blk.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'drivers')

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
index a31964e3e5a4..643ae3bc62c0 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
@@ -38,6 +38,7 @@
 #define VDPASIM_BLK_VQ_NUM	1
 
 static struct vdpasim *vdpasim_blk_dev;
+static char vdpasim_blk_id[VIRTIO_BLK_ID_BYTES] = "vdpa_blk_sim";
 
 static bool vdpasim_blk_check_range(u64 start_sector, size_t range_size)
 {
@@ -153,6 +154,20 @@ static bool vdpasim_blk_handle_req(struct vdpasim *vdpasim,
 		}
 		break;
 
+	case VIRTIO_BLK_T_GET_ID:
+		bytes = vringh_iov_push_iotlb(&vq->vring, &vq->in_iov,
+					      vdpasim_blk_id,
+					      VIRTIO_BLK_ID_BYTES);
+		if (bytes < 0) {
+			dev_err(&vdpasim->vdpa.dev,
+				"vringh_iov_push_iotlb() error: %zd\n", bytes);
+			status = VIRTIO_BLK_S_IOERR;
+			break;
+		}
+
+		pushed += bytes;
+		break;
+
 	default:
 		dev_warn(&vdpasim->vdpa.dev,
 			 "Unsupported request type %d\n", type);
-- 
cgit v1.2.3


From 899c4d187f6a5c11d8eae33506fa0736dbabc39f Mon Sep 17 00:00:00 2001
From: Stefano Garzarella <sgarzare@redhat.com>
Date: Mon, 15 Mar 2021 17:34:50 +0100
Subject: vdpa_sim_blk: add support for vdpa management tool

Enable the user to create vDPA block simulator devices using the
vdpa management tool:

    # Show vDPA supported devices
    $ vdpa mgmtdev show
    vdpasim_blk:
      supported_classes block

    # Create a vDPA block device named as 'blk0' from the management
    # device vdpasim:
    $ vdpa dev add mgmtdev vdpasim_blk name blk0

    # Show the info of the 'blk0' device just created
    $ vdpa dev show blk0 -jp
    {
        "dev": {
            "blk0": {
                "type": "block",
                "mgmtdev": "vdpasim_blk",
                "vendor_id": 0,
                "max_vqs": 1,
                "max_vq_size": 256
            }
        }
    }

    # Delete the vDPA device after its use
    $ vdpa dev del blk0

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210315163450.254396-15-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
 drivers/vdpa/vdpa_sim/vdpa_sim_blk.c | 76 ++++++++++++++++++++++++++++++------
 1 file changed, 63 insertions(+), 13 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
index 643ae3bc62c0..5bfe1c281645 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
@@ -37,7 +37,6 @@
 #define VDPASIM_BLK_SEG_MAX	32
 #define VDPASIM_BLK_VQ_NUM	1
 
-static struct vdpasim *vdpasim_blk_dev;
 static char vdpasim_blk_id[VIRTIO_BLK_ID_BYTES] = "vdpa_blk_sim";
 
 static bool vdpasim_blk_check_range(u64 start_sector, size_t range_size)
@@ -241,11 +240,23 @@ static void vdpasim_blk_get_config(struct vdpasim *vdpasim, void *config)
 	blk_config->blk_size = cpu_to_vdpasim32(vdpasim, SECTOR_SIZE);
 }
 
-static int __init vdpasim_blk_init(void)
+static void vdpasim_blk_mgmtdev_release(struct device *dev)
+{
+}
+
+static struct device vdpasim_blk_mgmtdev = {
+	.init_name = "vdpasim_blk",
+	.release = vdpasim_blk_mgmtdev_release,
+};
+
+static int vdpasim_blk_dev_add(struct vdpa_mgmt_dev *mdev, const char *name)
 {
 	struct vdpasim_dev_attr dev_attr = {};
+	struct vdpasim *simdev;
 	int ret;
 
+	dev_attr.mgmt_dev = mdev;
+	dev_attr.name = name;
 	dev_attr.id = VIRTIO_ID_BLOCK;
 	dev_attr.supported_features = VDPASIM_BLK_FEATURES;
 	dev_attr.nvqs = VDPASIM_BLK_VQ_NUM;
@@ -254,29 +265,68 @@ static int __init vdpasim_blk_init(void)
 	dev_attr.work_fn = vdpasim_blk_work;
 	dev_attr.buffer_size = VDPASIM_BLK_CAPACITY << SECTOR_SHIFT;
 
-	vdpasim_blk_dev = vdpasim_create(&dev_attr);
-	if (IS_ERR(vdpasim_blk_dev)) {
-		ret = PTR_ERR(vdpasim_blk_dev);
-		goto out;
-	}
+	simdev = vdpasim_create(&dev_attr);
+	if (IS_ERR(simdev))
+		return PTR_ERR(simdev);
 
-	ret = vdpa_register_device(&vdpasim_blk_dev->vdpa, VDPASIM_BLK_VQ_NUM);
+	ret = _vdpa_register_device(&simdev->vdpa, VDPASIM_BLK_VQ_NUM);
 	if (ret)
 		goto put_dev;
 
 	return 0;
 
 put_dev:
-	put_device(&vdpasim_blk_dev->vdpa.dev);
-out:
+	put_device(&simdev->vdpa.dev);
 	return ret;
 }
 
-static void __exit vdpasim_blk_exit(void)
+static void vdpasim_blk_dev_del(struct vdpa_mgmt_dev *mdev,
+				struct vdpa_device *dev)
 {
-	struct vdpa_device *vdpa = &vdpasim_blk_dev->vdpa;
+	struct vdpasim *simdev = container_of(dev, struct vdpasim, vdpa);
+
+	_vdpa_unregister_device(&simdev->vdpa);
+}
+
+static const struct vdpa_mgmtdev_ops vdpasim_blk_mgmtdev_ops = {
+	.dev_add = vdpasim_blk_dev_add,
+	.dev_del = vdpasim_blk_dev_del
+};
 
-	vdpa_unregister_device(vdpa);
+static struct virtio_device_id id_table[] = {
+	{ VIRTIO_ID_BLOCK, VIRTIO_DEV_ANY_ID },
+	{ 0 },
+};
+
+static struct vdpa_mgmt_dev mgmt_dev = {
+	.device = &vdpasim_blk_mgmtdev,
+	.id_table = id_table,
+	.ops = &vdpasim_blk_mgmtdev_ops,
+};
+
+static int __init vdpasim_blk_init(void)
+{
+	int ret;
+
+	ret = device_register(&vdpasim_blk_mgmtdev);
+	if (ret)
+		return ret;
+
+	ret = vdpa_mgmtdev_register(&mgmt_dev);
+	if (ret)
+		goto parent_err;
+
+	return 0;
+
+parent_err:
+	device_unregister(&vdpasim_blk_mgmtdev);
+	return ret;
+}
+
+static void __exit vdpasim_blk_exit(void)
+{
+	vdpa_mgmtdev_unregister(&mgmt_dev);
+	device_unregister(&vdpasim_blk_mgmtdev);
 }
 
 module_init(vdpasim_blk_init)
-- 
cgit v1.2.3


From 26bfea1309f5d4faad33383d2d82a3463f518982 Mon Sep 17 00:00:00 2001
From: Zhu Lingshan <lingshan.zhu@intel.com>
Date: Mon, 19 Apr 2021 14:33:24 +0800
Subject: vDPA/ifcvf: deduce VIRTIO device ID when probe

This commit deduces VIRTIO device ID as device type when probe,
then ifcvf_vdpa_get_device_id() can simply return the ID.
ifcvf_vdpa_get_features() and ifcvf_vdpa_get_config_size()
can work properly based on the device ID.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Link: https://lore.kernel.org/r/20210419063326.3748-2-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
 drivers/vdpa/ifcvf/ifcvf_base.h |  1 +
 drivers/vdpa/ifcvf/ifcvf_main.c | 27 +++++++++++++++------------
 2 files changed, 16 insertions(+), 12 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
index b2eeb16b9c2c..1c04cd256fa7 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.h
+++ b/drivers/vdpa/ifcvf/ifcvf_base.h
@@ -84,6 +84,7 @@ struct ifcvf_hw {
 	u32 notify_off_multiplier;
 	u64 req_features;
 	u64 hw_features;
+	u32 dev_type;
 	struct virtio_pci_common_cfg __iomem *common_cfg;
 	void __iomem *net_cfg;
 	struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2];
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index 44d7586019da..66927ec81fa5 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -323,19 +323,9 @@ static u32 ifcvf_vdpa_get_generation(struct vdpa_device *vdpa_dev)
 
 static u32 ifcvf_vdpa_get_device_id(struct vdpa_device *vdpa_dev)
 {
-	struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
-	struct pci_dev *pdev = adapter->pdev;
-	u32 ret = -ENODEV;
-
-	if (pdev->device < 0x1000 || pdev->device > 0x107f)
-		return ret;
-
-	if (pdev->device < 0x1040)
-		ret =  pdev->subsystem_device;
-	else
-		ret =  pdev->device - 0x1040;
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 
-	return ret;
+	return vf->dev_type;
 }
 
 static u32 ifcvf_vdpa_get_vendor_id(struct vdpa_device *vdpa_dev)
@@ -466,6 +456,19 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	pci_set_drvdata(pdev, adapter);
 
 	vf = &adapter->vf;
+
+	/* This drirver drives both modern virtio devices and transitional
+	 * devices in modern mode.
+	 * vDPA requires feature bit VIRTIO_F_ACCESS_PLATFORM,
+	 * so legacy devices and transitional devices in legacy
+	 * mode will not work for vDPA, this driver will not
+	 * drive devices with legacy interface.
+	 */
+	if (pdev->device < 0x1040)
+		vf->dev_type =  pdev->subsystem_device;
+	else
+		vf->dev_type =  pdev->device - 0x1040;
+
 	vf->base = pcim_iomap_table(pdev);
 
 	adapter->pdev = pdev;
-- 
cgit v1.2.3


From 6ad31d162a4e0227bd8e854255b37a23a4263900 Mon Sep 17 00:00:00 2001
From: Zhu Lingshan <lingshan.zhu@intel.com>
Date: Mon, 19 Apr 2021 14:33:25 +0800
Subject: vDPA/ifcvf: enable Intel C5000X-PL virtio-block for vDPA

This commit enabled Intel FPGA SmartNIC C5000X-PL virtio-block
for vDPA.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210419063326.3748-3-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/ifcvf/ifcvf_base.h |  8 +++++++-
 drivers/vdpa/ifcvf/ifcvf_main.c | 19 ++++++++++++++++++-
 2 files changed, 25 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
index 1c04cd256fa7..0111bfdeb342 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.h
+++ b/drivers/vdpa/ifcvf/ifcvf_base.h
@@ -15,6 +15,7 @@
 #include <linux/pci_regs.h>
 #include <linux/vdpa.h>
 #include <uapi/linux/virtio_net.h>
+#include <uapi/linux/virtio_blk.h>
 #include <uapi/linux/virtio_config.h>
 #include <uapi/linux/virtio_pci.h>
 
@@ -28,7 +29,12 @@
 #define C5000X_PL_SUBSYS_VENDOR_ID	0x8086
 #define C5000X_PL_SUBSYS_DEVICE_ID	0x0001
 
-#define IFCVF_SUPPORTED_FEATURES \
+#define C5000X_PL_BLK_VENDOR_ID		0x1AF4
+#define C5000X_PL_BLK_DEVICE_ID		0x1001
+#define C5000X_PL_BLK_SUBSYS_VENDOR_ID	0x8086
+#define C5000X_PL_BLK_SUBSYS_DEVICE_ID	0x0002
+
+#define IFCVF_NET_SUPPORTED_FEATURES \
 		((1ULL << VIRTIO_NET_F_MAC)			| \
 		 (1ULL << VIRTIO_F_ANY_LAYOUT)			| \
 		 (1ULL << VIRTIO_F_VERSION_1)			| \
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index 66927ec81fa5..9a4a6df91f08 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -168,10 +168,23 @@ static struct ifcvf_hw *vdpa_to_vf(struct vdpa_device *vdpa_dev)
 
 static u64 ifcvf_vdpa_get_features(struct vdpa_device *vdpa_dev)
 {
+	struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
 	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+	struct pci_dev *pdev = adapter->pdev;
+
 	u64 features;
 
-	features = ifcvf_get_features(vf) & IFCVF_SUPPORTED_FEATURES;
+	switch (vf->dev_type) {
+	case VIRTIO_ID_NET:
+		features = ifcvf_get_features(vf) & IFCVF_NET_SUPPORTED_FEATURES;
+		break;
+	case VIRTIO_ID_BLOCK:
+		features = ifcvf_get_features(vf);
+		break;
+	default:
+		features = 0;
+		IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", vf->dev_type);
+	}
 
 	return features;
 }
@@ -514,6 +527,10 @@ static struct pci_device_id ifcvf_pci_ids[] = {
 			 C5000X_PL_DEVICE_ID,
 			 C5000X_PL_SUBSYS_VENDOR_ID,
 			 C5000X_PL_SUBSYS_DEVICE_ID) },
+	{ PCI_DEVICE_SUB(C5000X_PL_BLK_VENDOR_ID,
+			 C5000X_PL_BLK_DEVICE_ID,
+			 C5000X_PL_BLK_SUBSYS_VENDOR_ID,
+			 C5000X_PL_BLK_SUBSYS_DEVICE_ID) },
 
 	{ 0 },
 };
-- 
cgit v1.2.3


From 5619003173bad626e7d6bd6241c1855b549f9311 Mon Sep 17 00:00:00 2001
From: Zhu Lingshan <lingshan.zhu@intel.com>
Date: Mon, 19 Apr 2021 14:33:26 +0800
Subject: vDPA/ifcvf: get_config_size should return dev specific config size

get_config_size() should return the size based on the decected
device type.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210419063326.3748-4-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vdpa/ifcvf/ifcvf_main.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index 9a4a6df91f08..ab0ab5cf0f6e 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -356,7 +356,24 @@ static u32 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
 
 static size_t ifcvf_vdpa_get_config_size(struct vdpa_device *vdpa_dev)
 {
-	return sizeof(struct virtio_net_config);
+	struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+	struct pci_dev *pdev = adapter->pdev;
+	size_t size;
+
+	switch (vf->dev_type) {
+	case VIRTIO_ID_NET:
+		size = sizeof(struct virtio_net_config);
+		break;
+	case VIRTIO_ID_BLOCK:
+		size = sizeof(struct virtio_blk_config);
+		break;
+	default:
+		size = 0;
+		IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", vf->dev_type);
+	}
+
+	return size;
 }
 
 static void ifcvf_vdpa_get_config(struct vdpa_device *vdpa_dev,
-- 
cgit v1.2.3


From 80d43cbd46155744ee450d2476ee4fcf2917ae9b Mon Sep 17 00:00:00 2001
From: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Date: Wed, 28 Apr 2021 08:13:56 +0200
Subject: block/rnbd-clt: Change queue_depth type in rnbd_clt_session to size_t

The member queue_depth in the structure rnbd_clt_session is read from the
rtrs client side using the function rtrs_clt_query, which in turn is read
from the rtrs_clt structure. It should really be of type size_t.

Fixes: 90426e89f54db ("block/rnbd: client: private header with client structs and functions")
Signed-off-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Reviewed-by: Guoqing Jiang <guoqing.jiang@ionos.com>
Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
Link: https://lore.kernel.org/r/20210428061359.206794-2-gi-oh.kim@ionos.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/block/rnbd/rnbd-clt.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/block/rnbd/rnbd-clt.h b/drivers/block/rnbd/rnbd-clt.h
index 451e7383738f..b5322c5aaac0 100644
--- a/drivers/block/rnbd/rnbd-clt.h
+++ b/drivers/block/rnbd/rnbd-clt.h
@@ -87,7 +87,7 @@ struct rnbd_clt_session {
 	DECLARE_BITMAP(cpu_queues_bm, NR_CPUS);
 	int	__percpu	*cpu_rr; /* per-cpu var for CPU round-robin */
 	atomic_t		busy;
-	int			queue_depth;
+	size_t			queue_depth;
 	u32			max_io_size;
 	struct blk_mq_tag_set	tag_set;
 	u32			nr_poll_queues;
-- 
cgit v1.2.3


From 292660fa35e8917a78235d39722edf9bbc04cab7 Mon Sep 17 00:00:00 2001
From: Dima Stepanov <dmitrii.stepanov@cloud.ionos.com>
Date: Wed, 28 Apr 2021 08:13:57 +0200
Subject: block/rnbd: Fix style issues

This patch fixes some style issues detected by scripts/checkpatch.pl
* Resolve spacing and tab issues
* Remove extra braces in rnbd_get_iu
* Use num_possible_cpus() instead of NR_CPUS in alloc_sess
* Fix the comments styling in rnbd_queue_rq

Signed-off-by: Dima Stepanov <dmitrii.stepanov@ionos.com>
Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
Signed-off-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Link: https://lore.kernel.org/r/20210428061359.206794-3-gi-oh.kim@ionos.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/block/rnbd/rnbd-clt.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/rnbd/rnbd-clt.c b/drivers/block/rnbd/rnbd-clt.c
index c01786afe1b1..15f831159c31 100644
--- a/drivers/block/rnbd/rnbd-clt.c
+++ b/drivers/block/rnbd/rnbd-clt.c
@@ -88,7 +88,7 @@ static int rnbd_clt_set_dev_attr(struct rnbd_clt_dev *dev,
 	dev->discard_alignment	    = le32_to_cpu(rsp->discard_alignment);
 	dev->secure_discard	    = le16_to_cpu(rsp->secure_discard);
 	dev->rotational		    = rsp->rotational;
-	dev->wc 		    = !!(rsp->cache_policy & RNBD_WRITEBACK);
+	dev->wc			    = !!(rsp->cache_policy & RNBD_WRITEBACK);
 	dev->fua		    = !!(rsp->cache_policy & RNBD_FUA);
 
 	dev->max_hw_sectors = sess->max_io_size / SECTOR_SIZE;
@@ -351,9 +351,8 @@ static struct rnbd_iu *rnbd_get_iu(struct rnbd_clt_session *sess,
 	struct rtrs_permit *permit;
 
 	iu = kzalloc(sizeof(*iu), GFP_KERNEL);
-	if (!iu) {
+	if (!iu)
 		return NULL;
-	}
 
 	permit = rnbd_get_permit(sess, con_type, wait);
 	if (unlikely(!permit)) {
@@ -805,7 +804,7 @@ static struct rnbd_clt_session *alloc_sess(const char *sessname)
 	mutex_init(&sess->lock);
 	INIT_LIST_HEAD(&sess->devs_list);
 	INIT_LIST_HEAD(&sess->list);
-	bitmap_zero(sess->cpu_queues_bm, NR_CPUS);
+	bitmap_zero(sess->cpu_queues_bm, num_possible_cpus());
 	init_waitqueue_head(&sess->rtrs_waitq);
 	refcount_set(&sess->refcount, 1);
 
@@ -1148,7 +1147,8 @@ static blk_status_t rnbd_queue_rq(struct blk_mq_hw_ctx *hctx,
 	iu->sgt.sgl = iu->first_sgl;
 	err = sg_alloc_table_chained(&iu->sgt,
 				     /* Even-if the request has no segment,
-				      * sglist must have one entry at least */
+				      * sglist must have one entry at least.
+				      */
 				     blk_rq_nr_phys_segments(rq) ? : 1,
 				     iu->sgt.sgl,
 				     RNBD_INLINE_SG_CNT);
-- 
cgit v1.2.3


From 1056ad829ec43f9b705b507c2093b05e2088b0b7 Mon Sep 17 00:00:00 2001
From: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Date: Wed, 28 Apr 2021 08:13:58 +0200
Subject: block/rnbd-clt: Check the return value of the function rtrs_clt_query

In case none of the paths are in connected state, the function
rtrs_clt_query returns an error. In such a case, error out since the
values in the rtrs_attrs structure would be garbage.

Fixes: f7a7a5c228d45 ("block/rnbd: client: main functionality")
Signed-off-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Reviewed-by: Guoqing Jiang <guoqing.jiang@ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
Link: https://lore.kernel.org/r/20210428061359.206794-4-gi-oh.kim@ionos.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/block/rnbd/rnbd-clt.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/rnbd/rnbd-clt.c b/drivers/block/rnbd/rnbd-clt.c
index 15f831159c31..f855bf1fa8d5 100644
--- a/drivers/block/rnbd/rnbd-clt.c
+++ b/drivers/block/rnbd/rnbd-clt.c
@@ -691,7 +691,11 @@ static void remap_devs(struct rnbd_clt_session *sess)
 		return;
 	}
 
-	rtrs_clt_query(sess->rtrs, &attrs);
+	err = rtrs_clt_query(sess->rtrs, &attrs);
+	if (err) {
+		pr_err("rtrs_clt_query(\"%s\"): %d\n", sess->sessname, err);
+		return;
+	}
 	mutex_lock(&sess->lock);
 	sess->max_io_size = attrs.max_io_size;
 
@@ -1294,7 +1298,11 @@ find_and_get_or_create_sess(const char *sessname,
 		err = PTR_ERR(sess->rtrs);
 		goto wake_up_and_put;
 	}
-	rtrs_clt_query(sess->rtrs, &attrs);
+
+	err = rtrs_clt_query(sess->rtrs, &attrs);
+	if (err)
+		goto close_rtrs;
+
 	sess->max_io_size = attrs.max_io_size;
 	sess->queue_depth = attrs.queue_depth;
 	sess->nr_poll_queues = nr_poll_queues;
-- 
cgit v1.2.3


From 1e31016b6926c996e9113619c2ce1f42ad74ddd1 Mon Sep 17 00:00:00 2001
From: Gioh Kim <gi-oh.kim@ionos.com>
Date: Wed, 28 Apr 2021 08:13:59 +0200
Subject: block/rnbd: Remove all likely and unlikely

The IO performance test with fio after removing the likely and
unlikely macros in all if-statement shows no performance drop.
They do not help for the performance of rnbd.

The fio test did random read on 32 rnbd devices and 64 processes.
Test environment:
- AMD Opteron(tm) Processor 6386 SE
- 125G memory
- kernel version: 5.4.86
- gcc version: gcc (Debian 8.3.0-6) 8.3.0
- Infiniband controller: InfiniBand: Mellanox Technologies MT26428
[ConnectX VPI PCIe 2.0 5GT/s - IB QDR / 10GigE] (rev b0)

before
read: IOPS=549k, BW=2146MiB/s
read: IOPS=544k, BW=2125MiB/s
read: IOPS=553k, BW=2158MiB/s
read: IOPS=535k, BW=2089MiB/s
read: IOPS=543k, BW=2122MiB/s
read: IOPS=552k, BW=2154MiB/s
average: IOPS=546k, BW=2132MiB/s

after
read: IOPS=556k, BW=2172MiB/s
read: IOPS=561k, BW=2191MiB/s
read: IOPS=552k, BW=2156MiB/s
read: IOPS=551k, BW=2154MiB/s
read: IOPS=562k, BW=2194MiB/s
-----------
average: IOPS=556k, BW=2173MiB/s

The IOPS and bandwidth got better slightly after removing
likely/unlikely. (IOPS= +1.8% BW= +1.9%) But we cannot make sure
that removing the likely/unlikely help the performance because it
depends on various situations. We only make sure that removing the
likely/unlikely does not drop the performance.

Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
Reviewed-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Link: https://lore.kernel.org/r/20210428061359.206794-5-gi-oh.kim@ionos.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/block/rnbd/rnbd-clt.c | 24 ++++++++++++------------
 drivers/block/rnbd/rnbd-srv.c |  2 +-
 2 files changed, 13 insertions(+), 13 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/rnbd/rnbd-clt.c b/drivers/block/rnbd/rnbd-clt.c
index f855bf1fa8d5..c604a402cd5c 100644
--- a/drivers/block/rnbd/rnbd-clt.c
+++ b/drivers/block/rnbd/rnbd-clt.c
@@ -241,7 +241,7 @@ static bool rnbd_rerun_if_needed(struct rnbd_clt_session *sess)
 	     cpu_q = rnbd_get_cpu_qlist(sess, nxt_cpu(cpu_q->cpu))) {
 		if (!spin_trylock_irqsave(&cpu_q->requeue_lock, flags))
 			continue;
-		if (unlikely(!test_bit(cpu_q->cpu, sess->cpu_queues_bm)))
+		if (!test_bit(cpu_q->cpu, sess->cpu_queues_bm))
 			goto unlock;
 		q = list_first_entry_or_null(&cpu_q->requeue_list,
 					     typeof(*q), requeue_list);
@@ -320,7 +320,7 @@ static struct rtrs_permit *rnbd_get_permit(struct rnbd_clt_session *sess,
 	struct rtrs_permit *permit;
 
 	permit = rtrs_clt_get_permit(sess->rtrs, con_type, wait);
-	if (likely(permit))
+	if (permit)
 		/* We have a subtle rare case here, when all permits can be
 		 * consumed before busy counter increased.  This is safe,
 		 * because loser will get NULL as a permit, observe 0 busy
@@ -355,7 +355,7 @@ static struct rnbd_iu *rnbd_get_iu(struct rnbd_clt_session *sess,
 		return NULL;
 
 	permit = rnbd_get_permit(sess, con_type, wait);
-	if (unlikely(!permit)) {
+	if (!permit) {
 		kfree(iu);
 		return NULL;
 	}
@@ -1050,7 +1050,7 @@ static int rnbd_client_xfer_request(struct rnbd_clt_dev *dev,
 	};
 	err = rtrs_clt_request(rq_data_dir(rq), &req_ops, rtrs, permit,
 			       &vec, 1, size, iu->sgt.sgl, sg_cnt);
-	if (unlikely(err)) {
+	if (err) {
 		rnbd_clt_err_rl(dev, "RTRS failed to transfer IO, err: %d\n",
 				 err);
 		return err;
@@ -1081,7 +1081,7 @@ static bool rnbd_clt_dev_add_to_requeue(struct rnbd_clt_dev *dev,
 	cpu_q = get_cpu_ptr(sess->cpu_queues);
 	spin_lock_irqsave(&cpu_q->requeue_lock, flags);
 
-	if (likely(!test_and_set_bit_lock(0, &q->in_list))) {
+	if (!test_and_set_bit_lock(0, &q->in_list)) {
 		if (WARN_ON(!list_empty(&q->requeue_list)))
 			goto unlock;
 
@@ -1093,7 +1093,7 @@ static bool rnbd_clt_dev_add_to_requeue(struct rnbd_clt_dev *dev,
 			 */
 			smp_mb__before_atomic();
 		}
-		if (likely(atomic_read(&sess->busy))) {
+		if (atomic_read(&sess->busy)) {
 			list_add_tail(&q->requeue_list, &cpu_q->requeue_list);
 		} else {
 			/* Very unlikely, but possible: busy counter was
@@ -1121,7 +1121,7 @@ static void rnbd_clt_dev_kick_mq_queue(struct rnbd_clt_dev *dev,
 
 	if (delay != RNBD_DELAY_IFBUSY)
 		blk_mq_delay_run_hw_queue(hctx, delay);
-	else if (unlikely(!rnbd_clt_dev_add_to_requeue(dev, q)))
+	else if (!rnbd_clt_dev_add_to_requeue(dev, q))
 		/*
 		 * If session is not busy we have to restart
 		 * the queue ourselves.
@@ -1138,12 +1138,12 @@ static blk_status_t rnbd_queue_rq(struct blk_mq_hw_ctx *hctx,
 	int err;
 	blk_status_t ret = BLK_STS_IOERR;
 
-	if (unlikely(dev->dev_state != DEV_STATE_MAPPED))
+	if (dev->dev_state != DEV_STATE_MAPPED)
 		return BLK_STS_IOERR;
 
 	iu->permit = rnbd_get_permit(dev->sess, RTRS_IO_CON,
 				      RTRS_PERMIT_NOWAIT);
-	if (unlikely(!iu->permit)) {
+	if (!iu->permit) {
 		rnbd_clt_dev_kick_mq_queue(dev, hctx, RNBD_DELAY_IFBUSY);
 		return BLK_STS_RESOURCE;
 	}
@@ -1165,9 +1165,9 @@ static blk_status_t rnbd_queue_rq(struct blk_mq_hw_ctx *hctx,
 
 	blk_mq_start_request(rq);
 	err = rnbd_client_xfer_request(dev, rq, iu);
-	if (likely(err == 0))
+	if (err == 0)
 		return BLK_STS_OK;
-	if (unlikely(err == -EAGAIN || err == -ENOMEM)) {
+	if (err == -EAGAIN || err == -ENOMEM) {
 		rnbd_clt_dev_kick_mq_queue(dev, hctx, 10/*ms*/);
 		ret = BLK_STS_RESOURCE;
 	}
@@ -1584,7 +1584,7 @@ struct rnbd_clt_dev *rnbd_clt_map_device(const char *sessname,
 	struct rnbd_clt_dev *dev;
 	int ret;
 
-	if (unlikely(exists_devpath(pathname, sessname)))
+	if (exists_devpath(pathname, sessname))
 		return ERR_PTR(-EEXIST);
 
 	sess = find_and_get_or_create_sess(sessname, paths, path_cnt, port_nr, nr_poll_queues);
diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c
index 899dd9d7c10b..aafecfe97055 100644
--- a/drivers/block/rnbd/rnbd-srv.c
+++ b/drivers/block/rnbd/rnbd-srv.c
@@ -104,7 +104,7 @@ rnbd_get_sess_dev(int dev_id, struct rnbd_srv_session *srv_sess)
 
 	rcu_read_lock();
 	sess_dev = xa_load(&srv_sess->index_idr, dev_id);
-	if (likely(sess_dev))
+	if (sess_dev)
 		ret = kref_get_unless_zero(&sess_dev->kref);
 	rcu_read_unlock();
 
-- 
cgit v1.2.3


From be4f361d69f4487ab56eb67b0cd0559fb1895af2 Mon Sep 17 00:00:00 2001
From: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Date: Wed, 28 Apr 2021 17:35:21 +0200
Subject: s390: dasd: Mundane spelling fixes

s/Subssystem/Subsystem/ ......two different places
s/reportet/reported/
s/managemnet/management/

Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Link: https://lore.kernel.org/r/20210428153521.2050899-2-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/s390/block/dasd_eckd.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/s390/block/dasd_eckd.h b/drivers/s390/block/dasd_eckd.h
index ca24a78a256e..73651211789f 100644
--- a/drivers/s390/block/dasd_eckd.h
+++ b/drivers/s390/block/dasd_eckd.h
@@ -52,7 +52,7 @@
 #define DASD_ECKD_CCW_RCD		 0xFA
 #define DASD_ECKD_CCW_DSO		 0xF7
 
-/* Define Subssystem Function / Orders */
+/* Define Subsystem Function / Orders */
 #define DSO_ORDER_RAS			 0x81
 
 /*
@@ -110,7 +110,7 @@
 #define DASD_ECKD_PG_GROUPED		 0x10
 
 /*
- * Size that is reportet for large volumes in the old 16-bit no_cyl field
+ * Size that is reported for large volumes in the old 16-bit no_cyl field
  */
 #define LV_COMPAT_CYL 0xFFFE
 
@@ -555,7 +555,7 @@ struct dasd_dso_ras_ext_range {
 } __packed;
 
 /*
- * Define Subsytem Operation - Release Allocated Space
+ * Define Subsystem Operation - Release Allocated Space
  */
 struct dasd_dso_ras_data {
 	__u8 order;
@@ -676,7 +676,7 @@ struct dasd_eckd_private {
 	struct dasd_ext_pool_sum eps;
 	u32 real_cyl;
 
-	/* alias managemnet */
+	/* alias management */
 	struct dasd_uid uid;
 	struct alias_pav_group *pavgroup;
 	struct alias_lcu *lcu;
-- 
cgit v1.2.3


From c646790a1fcae7738972accc41ccaa4983e5c234 Mon Sep 17 00:00:00 2001
From: Gioh Kim <gi-oh.kim@ionos.com>
Date: Thu, 29 Apr 2021 11:27:41 +0200
Subject: RDMA/rtrs: fix uninitialized symbol 'cnt'

rtrs_clt_rdma_cq_direct returns an ninitialized value in cnt
if there is no session. This patch makes rtrs_clt_rdma_cq_direct
returns a negative value for block layer not to try again.

Fixes: 2958a995edc94 ("block/rnbd-clt: Support polling mode for IO latency optimization")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Link: https://lore.kernel.org/r/20210429092741.266533-1-gi-oh.kim@ionos.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/infiniband/ulp/rtrs/rtrs-clt.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
index b74a872387c4..934a2ff18e7f 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
@@ -2896,7 +2896,8 @@ EXPORT_SYMBOL(rtrs_clt_request);
 
 int rtrs_clt_rdma_cq_direct(struct rtrs_clt *clt, unsigned int index)
 {
-	int cnt;
+	/* If no path, return -1 for block layer not to try again */
+	int cnt = -1;
 	struct rtrs_con *con;
 	struct rtrs_clt_sess *sess;
 	struct path_it it;
-- 
cgit v1.2.3


From e8d6f9e56187c101b325e8d18f1d4032420d08ff Mon Sep 17 00:00:00 2001
From: Jim Quinlan <jim2101024@gmail.com>
Date: Fri, 30 Apr 2021 11:21:55 -0400
Subject: ata: ahci_brcm: Fix use of BCM7216 reset controller

This driver may use one of two resets controllers.  Keep them in separate
variables to keep things simple.  The reset controller "rescal" is shared
between the AHCI driver and the PCIe driver for the BrcmSTB 7216 chip.  Use
devm_reset_control_get_optional_shared() to handle this sharing.

[bhelgaas: add Jens' ack from v5 posting]
Fixes: 272ecd60a636 ("ata: ahci_brcm: BCM7216 reset is self de-asserting")
Fixes: c345ec6a50e9 ("ata: ahci_brcm: Support BCM7216 reset controller name")
Link: https://lore.kernel.org/r/20210430152156.21162-3-jim2101024@gmail.com
Signed-off-by: Jim Quinlan <jim2101024@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/ata/ahci_brcm.c | 46 +++++++++++++++++++++++-----------------------
 1 file changed, 23 insertions(+), 23 deletions(-)

(limited to 'drivers')

diff --git a/drivers/ata/ahci_brcm.c b/drivers/ata/ahci_brcm.c
index 5b32df5d33ad..6e9c5ade4c2e 100644
--- a/drivers/ata/ahci_brcm.c
+++ b/drivers/ata/ahci_brcm.c
@@ -86,7 +86,8 @@ struct brcm_ahci_priv {
 	u32 port_mask;
 	u32 quirks;
 	enum brcm_ahci_version version;
-	struct reset_control *rcdev;
+	struct reset_control *rcdev_rescal;
+	struct reset_control *rcdev_ahci;
 };
 
 static inline u32 brcm_sata_readreg(void __iomem *addr)
@@ -352,8 +353,8 @@ static int brcm_ahci_suspend(struct device *dev)
 	else
 		ret = 0;
 
-	if (priv->version != BRCM_SATA_BCM7216)
-		reset_control_assert(priv->rcdev);
+	reset_control_assert(priv->rcdev_ahci);
+	reset_control_rearm(priv->rcdev_rescal);
 
 	return ret;
 }
@@ -365,10 +366,10 @@ static int __maybe_unused brcm_ahci_resume(struct device *dev)
 	struct brcm_ahci_priv *priv = hpriv->plat_data;
 	int ret = 0;
 
-	if (priv->version == BRCM_SATA_BCM7216)
-		ret = reset_control_reset(priv->rcdev);
-	else
-		ret = reset_control_deassert(priv->rcdev);
+	ret = reset_control_deassert(priv->rcdev_ahci);
+	if (ret)
+		return ret;
+	ret = reset_control_reset(priv->rcdev_rescal);
 	if (ret)
 		return ret;
 
@@ -434,7 +435,6 @@ static int brcm_ahci_probe(struct platform_device *pdev)
 {
 	const struct of_device_id *of_id;
 	struct device *dev = &pdev->dev;
-	const char *reset_name = NULL;
 	struct brcm_ahci_priv *priv;
 	struct ahci_host_priv *hpriv;
 	struct resource *res;
@@ -456,15 +456,15 @@ static int brcm_ahci_probe(struct platform_device *pdev)
 	if (IS_ERR(priv->top_ctrl))
 		return PTR_ERR(priv->top_ctrl);
 
-	/* Reset is optional depending on platform and named differently */
-	if (priv->version == BRCM_SATA_BCM7216)
-		reset_name = "rescal";
-	else
-		reset_name = "ahci";
-
-	priv->rcdev = devm_reset_control_get_optional(&pdev->dev, reset_name);
-	if (IS_ERR(priv->rcdev))
-		return PTR_ERR(priv->rcdev);
+	if (priv->version == BRCM_SATA_BCM7216) {
+		priv->rcdev_rescal = devm_reset_control_get_optional_shared(
+			&pdev->dev, "rescal");
+		if (IS_ERR(priv->rcdev_rescal))
+			return PTR_ERR(priv->rcdev_rescal);
+	}
+	priv->rcdev_ahci = devm_reset_control_get_optional(&pdev->dev, "ahci");
+	if (IS_ERR(priv->rcdev_ahci))
+		return PTR_ERR(priv->rcdev_ahci);
 
 	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
@@ -485,10 +485,10 @@ static int brcm_ahci_probe(struct platform_device *pdev)
 		break;
 	}
 
-	if (priv->version == BRCM_SATA_BCM7216)
-		ret = reset_control_reset(priv->rcdev);
-	else
-		ret = reset_control_deassert(priv->rcdev);
+	ret = reset_control_reset(priv->rcdev_rescal);
+	if (ret)
+		return ret;
+	ret = reset_control_deassert(priv->rcdev_ahci);
 	if (ret)
 		return ret;
 
@@ -539,8 +539,8 @@ out_disable_regulators:
 out_disable_clks:
 	ahci_platform_disable_clks(hpriv);
 out_reset:
-	if (priv->version != BRCM_SATA_BCM7216)
-		reset_control_assert(priv->rcdev);
+	reset_control_assert(priv->rcdev_ahci);
+	reset_control_rearm(priv->rcdev_rescal);
 	return ret;
 }
 
-- 
cgit v1.2.3


From bb610757fcd74558ad94fe19993fd4470208dd02 Mon Sep 17 00:00:00 2001
From: Jim Quinlan <jim2101024@gmail.com>
Date: Fri, 30 Apr 2021 11:21:56 -0400
Subject: PCI: brcmstb: Use reset/rearm instead of deassert/assert

The Broadcom STB PCIe RC uses a reset control "rescal" for certain chips.
The "rescal" implements a "pulse reset" so using assert/deassert is wrong
for this device.  Instead, we use reset/rearm.  We need to use rearm so
that we can reset it after a suspend/resume cycle; w/o using "rearm", the
"rescal" device will only ever fire once.

Of course for suspend/resume to work we also need to put the reset/rearm
calls in the suspend and resume routines.

Fixes: 740d6c3708a9 ("PCI: brcmstb: Add control of rescal reset")
Link: https://lore.kernel.org/r/20210430152156.21162-4-jim2101024@gmail.com
Signed-off-by: Jim Quinlan <jim2101024@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/pci/controller/pcie-brcmstb.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index e330e6811f0b..3b35d629035e 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -1148,6 +1148,7 @@ static int brcm_pcie_suspend(struct device *dev)
 
 	brcm_pcie_turn_off(pcie);
 	ret = brcm_phy_stop(pcie);
+	reset_control_rearm(pcie->rescal);
 	clk_disable_unprepare(pcie->clk);
 
 	return ret;
@@ -1163,9 +1164,13 @@ static int brcm_pcie_resume(struct device *dev)
 	base = pcie->base;
 	clk_prepare_enable(pcie->clk);
 
+	ret = reset_control_reset(pcie->rescal);
+	if (ret)
+		goto err_disable_clk;
+
 	ret = brcm_phy_start(pcie);
 	if (ret)
-		goto err;
+		goto err_reset;
 
 	/* Take bridge out of reset so we can access the SERDES reg */
 	pcie->bridge_sw_init_set(pcie, 0);
@@ -1180,14 +1185,16 @@ static int brcm_pcie_resume(struct device *dev)
 
 	ret = brcm_pcie_setup(pcie);
 	if (ret)
-		goto err;
+		goto err_reset;
 
 	if (pcie->msi)
 		brcm_msi_set_regs(pcie->msi);
 
 	return 0;
 
-err:
+err_reset:
+	reset_control_rearm(pcie->rescal);
+err_disable_clk:
 	clk_disable_unprepare(pcie->clk);
 	return ret;
 }
@@ -1197,7 +1204,7 @@ static void __brcm_pcie_remove(struct brcm_pcie *pcie)
 	brcm_msi_remove(pcie);
 	brcm_pcie_turn_off(pcie);
 	brcm_phy_stop(pcie);
-	reset_control_assert(pcie->rescal);
+	reset_control_rearm(pcie->rescal);
 	clk_disable_unprepare(pcie->clk);
 }
 
@@ -1278,13 +1285,13 @@ static int brcm_pcie_probe(struct platform_device *pdev)
 		return PTR_ERR(pcie->perst_reset);
 	}
 
-	ret = reset_control_deassert(pcie->rescal);
+	ret = reset_control_reset(pcie->rescal);
 	if (ret)
 		dev_err(&pdev->dev, "failed to deassert 'rescal'\n");
 
 	ret = brcm_phy_start(pcie);
 	if (ret) {
-		reset_control_assert(pcie->rescal);
+		reset_control_rearm(pcie->rescal);
 		clk_disable_unprepare(pcie->clk);
 		return ret;
 	}
-- 
cgit v1.2.3


From 5cd1a85a6c3f49ad008c008299e0dbe9ac33fba6 Mon Sep 17 00:00:00 2001
From: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Date: Sun, 25 Apr 2021 18:40:58 +0800
Subject: of: overlay: Remove redundant assignment to ret

Variable ret is set to zero but this value is never read as it is
overwritten with a new value later on, hence it is a redundant
assignment and can be removed.

Cleans up the following clang-analyzer warning:

drivers/of/overlay.c:1197:2: warning: Value stored to 'ret' is never
read [clang-analyzer-deadcode.DeadStores].

drivers/of/overlay.c:1026:2: warning: Value stored to 'ret' is never
read [clang-analyzer-deadcode.DeadStores].

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Link: https://lore.kernel.org/r/1619347258-55002-1-git-send-email-jiapeng.chong@linux.alibaba.com
Signed-off-by: Rob Herring <robh@kernel.org>
---
 drivers/of/overlay.c | 3 ---
 1 file changed, 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c
index 180c6fb3ef36..d80160cf34bb 100644
--- a/drivers/of/overlay.c
+++ b/drivers/of/overlay.c
@@ -1024,7 +1024,6 @@ int of_overlay_fdt_apply(const void *overlay_fdt, u32 overlay_fdt_size,
 	struct device_node *overlay_root = NULL;
 
 	*ovcs_id = 0;
-	ret = 0;
 
 	if (overlay_fdt_size < sizeof(struct fdt_header) ||
 	    fdt_check_header(overlay_fdt)) {
@@ -1195,8 +1194,6 @@ int of_overlay_remove(int *ovcs_id)
 	struct overlay_changeset *ovcs;
 	int ret, ret_apply, ret_tmp;
 
-	ret = 0;
-
 	if (devicetree_corrupt()) {
 		pr_err("suspect devicetree state, refuse to remove overlay\n");
 		ret = -EBUSY;
-- 
cgit v1.2.3


From 48145b62563a9ae1ad631d6b576c6b9a798fcbec Mon Sep 17 00:00:00 2001
From: Minwoo Im <minwoo.im.dev@gmail.com>
Date: Thu, 22 Apr 2021 17:04:07 +0900
Subject: nvme: fix controller ioctl through ns_head

In multipath case, we should consider namespace attachment with
controllers in a subsystem when we find out the live controller for the
namespace.  This patch manually reverted the commit 3557a4409701
("nvme: don't bother to look up a namespace for controller ioctls") with
few more updates to nvme_ns_head_chr_ioctl which has been newly updated.

Fixes: 3557a4409701 ("nvme: don't bother to look up a namespace for
controller ioctls")
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/core.c  | 22 ----------------
 drivers/nvme/host/ioctl.c | 65 ++++++++++++++++++++++++++++++-----------------
 drivers/nvme/host/nvme.h  |  1 -
 3 files changed, 41 insertions(+), 47 deletions(-)

(limited to 'drivers')

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index b6f7815fa239..c1c196459d79 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1999,28 +1999,6 @@ static const struct block_device_operations nvme_bdev_ops = {
 	.pr_ops		= &nvme_pr_ops,
 };
 
-#ifdef CONFIG_NVME_MULTIPATH
-struct nvme_ctrl *nvme_find_get_live_ctrl(struct nvme_subsystem *subsys)
-{
-	struct nvme_ctrl *ctrl;
-	int ret;
-
-	ret = mutex_lock_killable(&nvme_subsystems_lock);
-	if (ret)
-		return ERR_PTR(ret);
-	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) {
-		if (ctrl->state == NVME_CTRL_LIVE)
-			goto found;
-	}
-	mutex_unlock(&nvme_subsystems_lock);
-	return ERR_PTR(-EWOULDBLOCK);
-found:
-	nvme_get_ctrl(ctrl);
-	mutex_unlock(&nvme_subsystems_lock);
-	return ctrl;
-}
-#endif /* CONFIG_NVME_MULTIPATH */
-
 static int nvme_wait_ready(struct nvme_ctrl *ctrl, u64 cap, bool enabled)
 {
 	unsigned long timeout =
diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c
index 502f8e4a2a1f..9557ead02de1 100644
--- a/drivers/nvme/host/ioctl.c
+++ b/drivers/nvme/host/ioctl.c
@@ -370,41 +370,45 @@ long nvme_ns_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 }
 
 #ifdef CONFIG_NVME_MULTIPATH
-static int nvme_ns_head_ctrl_ioctl(struct nvme_ns_head *head,
-		unsigned int cmd, void __user *argp)
+static int nvme_ns_head_ctrl_ioctl(struct nvme_ns *ns, unsigned int cmd,
+		void __user *argp, struct nvme_ns_head *head, int srcu_idx)
 {
-	struct nvme_ctrl *ctrl = nvme_find_get_live_ctrl(head->subsys);
+	struct nvme_ctrl *ctrl = ns->ctrl;
 	int ret;
 
-	if (IS_ERR(ctrl))
-		return PTR_ERR(ctrl);
-	ret = nvme_ctrl_ioctl(ctrl, cmd, argp);
-	nvme_put_ctrl(ctrl);
-	return ret;
-}
+	nvme_get_ctrl(ns->ctrl);
+	nvme_put_ns_from_disk(head, srcu_idx);
+	ret = nvme_ctrl_ioctl(ns->ctrl, cmd, argp);
 
-static int nvme_ns_head_ns_ioctl(struct nvme_ns_head *head,
-		unsigned int cmd, void __user *argp)
-{
-	int srcu_idx = srcu_read_lock(&head->srcu);
-	struct nvme_ns *ns = nvme_find_path(head);
-	int ret = -EWOULDBLOCK;
-
-	if (ns)
-		ret = nvme_ns_ioctl(ns, cmd, argp);
-	srcu_read_unlock(&head->srcu, srcu_idx);
+	nvme_put_ctrl(ctrl);
 	return ret;
 }
 
 int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
 		unsigned int cmd, unsigned long arg)
 {
-	struct nvme_ns_head *head = bdev->bd_disk->private_data;
+	struct nvme_ns_head *head = NULL;
 	void __user *argp = (void __user *)arg;
+	struct nvme_ns *ns;
+	int srcu_idx, ret;
+
+	ns = nvme_get_ns_from_disk(bdev->bd_disk, &head, &srcu_idx);
+	if (unlikely(!ns))
+		return -EWOULDBLOCK;
 
+	/*
+	 * Handle ioctls that apply to the controller instead of the namespace
+	 * seperately and drop the ns SRCU reference early.  This avoids a
+	 * deadlock when deleting namespaces using the passthrough interface.
+	 */
 	if (is_ctrl_ioctl(cmd))
-		return nvme_ns_head_ctrl_ioctl(head, cmd, argp);
-	return nvme_ns_head_ns_ioctl(head, cmd, argp);
+		ret = nvme_ns_head_ctrl_ioctl(ns, cmd, argp, head, srcu_idx);
+	else {
+		ret = nvme_ns_ioctl(ns, cmd, argp);
+		nvme_put_ns_from_disk(head, srcu_idx);
+	}
+
+	return ret;
 }
 
 long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,
@@ -414,10 +418,23 @@ long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,
 	struct nvme_ns_head *head =
 		container_of(cdev, struct nvme_ns_head, cdev);
 	void __user *argp = (void __user *)arg;
+	struct nvme_ns *ns;
+	int srcu_idx, ret;
+
+	srcu_idx = srcu_read_lock(&head->srcu);
+	ns = nvme_find_path(head);
+	if (!ns) {
+		srcu_read_unlock(&head->srcu, srcu_idx);
+		return -EWOULDBLOCK;
+	}
 
 	if (is_ctrl_ioctl(cmd))
-		return nvme_ns_head_ctrl_ioctl(head, cmd, argp);
-	return nvme_ns_head_ns_ioctl(head, cmd, argp);
+		return nvme_ns_head_ctrl_ioctl(ns, cmd, argp, head, srcu_idx);
+
+	ret = nvme_ns_ioctl(ns, cmd, argp);
+	nvme_put_ns_from_disk(head, srcu_idx);
+
+	return ret;
 }
 #endif /* CONFIG_NVME_MULTIPATH */
 
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 773dde5b231d..c1e086a0bc3f 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -664,7 +664,6 @@ struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk,
 void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx);
 bool nvme_tryget_ns_head(struct nvme_ns_head *head);
 void nvme_put_ns_head(struct nvme_ns_head *head);
-struct nvme_ctrl *nvme_find_get_live_ctrl(struct nvme_subsystem *subsys);
 int nvme_cdev_add(struct cdev *cdev, struct device *cdev_device,
 		const struct file_operations *fops, struct module *owner);
 void nvme_cdev_del(struct cdev *cdev, struct device *cdev_device);
-- 
cgit v1.2.3


From 4c74d1f80381996027bacc4f6c554948ef9bf374 Mon Sep 17 00:00:00 2001
From: Kanchan Joshi <joshi.k@samsung.com>
Date: Tue, 27 Apr 2021 12:17:46 +0530
Subject: nvme: add nvme_get_ns helper

Add a helper to avoid opencoding ns->kref increment.
Decrement is already done via nvme_put_ns helper.

Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/core.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index c1c196459d79..f2d1f2d699b8 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -576,6 +576,11 @@ static void nvme_free_ns(struct kref *kref)
 	kfree(ns);
 }
 
+static inline bool nvme_get_ns(struct nvme_ns *ns)
+{
+	return kref_get_unless_zero(&ns->kref);
+}
+
 void nvme_put_ns(struct nvme_ns *ns)
 {
 	kref_put(&ns->kref, nvme_free_ns);
@@ -1494,7 +1499,7 @@ static int nvme_ns_open(struct nvme_ns *ns)
 	/* should never be called due to GENHD_FL_HIDDEN */
 	if (WARN_ON_ONCE(nvme_ns_head_multipath(ns->head)))
 		goto fail;
-	if (!kref_get_unless_zero(&ns->kref))
+	if (!nvme_get_ns(ns))
 		goto fail;
 	if (!try_module_get(ns->ctrl->ops->module))
 		goto fail_put_ns;
@@ -3582,7 +3587,7 @@ struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid)
 	down_read(&ctrl->namespaces_rwsem);
 	list_for_each_entry(ns, &ctrl->namespaces, list) {
 		if (ns->head->ns_id == nsid) {
-			if (!kref_get_unless_zero(&ns->kref))
+			if (!nvme_get_ns(ns))
 				continue;
 			ret = ns;
 			break;
-- 
cgit v1.2.3


From 51ad06cd698cb9ff280a769ed8d57210a1d2266d Mon Sep 17 00:00:00 2001
From: Kanchan Joshi <joshi.k@samsung.com>
Date: Tue, 27 Apr 2021 12:17:47 +0530
Subject: nvme: avoid memset for passthrough requests

nvme_clear_nvme_request() clears the nvme_command, which is unncessary
for passthrough requests as nvme_command is overwritten immediately.
Move clearing part from this helper to the caller, so that double memset
for passthrough requests is avoided.

Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/core.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index f2d1f2d699b8..61e122cecc2a 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -589,9 +589,6 @@ EXPORT_SYMBOL_NS_GPL(nvme_put_ns, NVME_TARGET_PASSTHRU);
 
 static inline void nvme_clear_nvme_request(struct request *req)
 {
-	struct nvme_command *cmd = nvme_req(req)->cmd;
-
-	memset(cmd, 0, sizeof(*cmd));
 	nvme_req(req)->retries = 0;
 	nvme_req(req)->flags = 0;
 	req->rq_flags |= RQF_DONTPREP;
@@ -903,8 +900,10 @@ blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req)
 	struct nvme_command *cmd = nvme_req(req)->cmd;
 	blk_status_t ret = BLK_STS_OK;
 
-	if (!(req->rq_flags & RQF_DONTPREP))
+	if (!(req->rq_flags & RQF_DONTPREP)) {
 		nvme_clear_nvme_request(req);
+		memset(cmd, 0, sizeof(*cmd));
+	}
 
 	switch (req_op(req)) {
 	case REQ_OP_DRV_IN:
-- 
cgit v1.2.3


From a97157440e1e69c35d7804d3b72da0c626ef28e6 Mon Sep 17 00:00:00 2001
From: Tao Chiu <taochiu@synology.com>
Date: Mon, 26 Apr 2021 10:53:10 +0800
Subject: nvme: move the fabrics queue ready check routines to core

queue_rq() in pci only checks if the dispatched queue (nvmeq) is ready,
e.g. not being suspended. Since nvme_alloc_admin_tags() in reset flow
restarts the admin queue, users are able to submit admin commands to a
controller before reset_work() completes. Commands submitted under this
condition may interfere with commands that performs identify, IO queue
setup in reset_work(), and may result in a hang described in the
following patch.

As seen in the fabrics, user commands are prevented from being executed
under inproper controller states. We may reuse this logic to maintain a
clear admin queue during reset_work().

Signed-off-by: Tao Chiu <taochiu@synology.com>
Signed-off-by: Cody Wong <codywong@synology.com>
Reviewed-by: Leon Chien <leonchien@synology.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/core.c    | 60 +++++++++++++++++++++++++++++++++++++++++++++
 drivers/nvme/host/fabrics.c | 57 ------------------------------------------
 drivers/nvme/host/fabrics.h | 13 ----------
 drivers/nvme/host/fc.c      |  4 +--
 drivers/nvme/host/nvme.h    | 15 ++++++++++++
 drivers/nvme/host/rdma.c    |  4 +--
 drivers/nvme/host/tcp.c     |  4 +--
 drivers/nvme/target/loop.c  |  4 +--
 8 files changed, 83 insertions(+), 78 deletions(-)

(limited to 'drivers')

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 61e122cecc2a..522c9b229f80 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -639,6 +639,66 @@ static struct request *nvme_alloc_request_qid(struct request_queue *q,
 	return req;
 }
 
+/*
+ * For something we're not in a state to send to the device the default action
+ * is to busy it and retry it after the controller state is recovered.  However,
+ * if the controller is deleting or if anything is marked for failfast or
+ * nvme multipath it is immediately failed.
+ *
+ * Note: commands used to initialize the controller will be marked for failfast.
+ * Note: nvme cli/ioctl commands are marked for failfast.
+ */
+blk_status_t nvme_fail_nonready_command(struct nvme_ctrl *ctrl,
+		struct request *rq)
+{
+	if (ctrl->state != NVME_CTRL_DELETING_NOIO &&
+	    ctrl->state != NVME_CTRL_DEAD &&
+	    !test_bit(NVME_CTRL_FAILFAST_EXPIRED, &ctrl->flags) &&
+	    !blk_noretry_request(rq) && !(rq->cmd_flags & REQ_NVME_MPATH))
+		return BLK_STS_RESOURCE;
+	return nvme_host_path_error(rq);
+}
+EXPORT_SYMBOL_GPL(nvme_fail_nonready_command);
+
+bool __nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
+		bool queue_live)
+{
+	struct nvme_request *req = nvme_req(rq);
+
+	/*
+	 * currently we have a problem sending passthru commands
+	 * on the admin_q if the controller is not LIVE because we can't
+	 * make sure that they are going out after the admin connect,
+	 * controller enable and/or other commands in the initialization
+	 * sequence. until the controller will be LIVE, fail with
+	 * BLK_STS_RESOURCE so that they will be rescheduled.
+	 */
+	if (rq->q == ctrl->admin_q && (req->flags & NVME_REQ_USERCMD))
+		return false;
+
+	if (ctrl->ops->flags & NVME_F_FABRICS) {
+		/*
+		 * Only allow commands on a live queue, except for the connect
+		 * command, which is require to set the queue live in the
+		 * appropinquate states.
+		 */
+		switch (ctrl->state) {
+		case NVME_CTRL_CONNECTING:
+			if (blk_rq_is_passthrough(rq) && nvme_is_fabrics(req->cmd) &&
+			    req->cmd->fabrics.fctype == nvme_fabrics_type_connect)
+				return true;
+			break;
+		default:
+			break;
+		case NVME_CTRL_DEAD:
+			return false;
+		}
+	}
+
+	return queue_live;
+}
+EXPORT_SYMBOL_GPL(__nvme_check_ready);
+
 static int nvme_toggle_streams(struct nvme_ctrl *ctrl, bool enable)
 {
 	struct nvme_command c;
diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
index 13c2747e3d00..a2bb7fc63a73 100644
--- a/drivers/nvme/host/fabrics.c
+++ b/drivers/nvme/host/fabrics.c
@@ -533,63 +533,6 @@ static struct nvmf_transport_ops *nvmf_lookup_transport(
 	return NULL;
 }
 
-/*
- * For something we're not in a state to send to the device the default action
- * is to busy it and retry it after the controller state is recovered.  However,
- * if the controller is deleting or if anything is marked for failfast or
- * nvme multipath it is immediately failed.
- *
- * Note: commands used to initialize the controller will be marked for failfast.
- * Note: nvme cli/ioctl commands are marked for failfast.
- */
-blk_status_t nvmf_fail_nonready_command(struct nvme_ctrl *ctrl,
-		struct request *rq)
-{
-	if (ctrl->state != NVME_CTRL_DELETING_NOIO &&
-	    ctrl->state != NVME_CTRL_DEAD &&
-	    !test_bit(NVME_CTRL_FAILFAST_EXPIRED, &ctrl->flags) &&
-	    !blk_noretry_request(rq) && !(rq->cmd_flags & REQ_NVME_MPATH))
-		return BLK_STS_RESOURCE;
-	return nvme_host_path_error(rq);
-}
-EXPORT_SYMBOL_GPL(nvmf_fail_nonready_command);
-
-bool __nvmf_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
-		bool queue_live)
-{
-	struct nvme_request *req = nvme_req(rq);
-
-	/*
-	 * currently we have a problem sending passthru commands
-	 * on the admin_q if the controller is not LIVE because we can't
-	 * make sure that they are going out after the admin connect,
-	 * controller enable and/or other commands in the initialization
-	 * sequence. until the controller will be LIVE, fail with
-	 * BLK_STS_RESOURCE so that they will be rescheduled.
-	 */
-	if (rq->q == ctrl->admin_q && (req->flags & NVME_REQ_USERCMD))
-		return false;
-
-	/*
-	 * Only allow commands on a live queue, except for the connect command,
-	 * which is require to set the queue live in the appropinquate states.
-	 */
-	switch (ctrl->state) {
-	case NVME_CTRL_CONNECTING:
-		if (blk_rq_is_passthrough(rq) && nvme_is_fabrics(req->cmd) &&
-		    req->cmd->fabrics.fctype == nvme_fabrics_type_connect)
-			return true;
-		break;
-	default:
-		break;
-	case NVME_CTRL_DEAD:
-		return false;
-	}
-
-	return queue_live;
-}
-EXPORT_SYMBOL_GPL(__nvmf_check_ready);
-
 static const match_table_t opt_tokens = {
 	{ NVMF_OPT_TRANSPORT,		"transport=%s"		},
 	{ NVMF_OPT_TRADDR,		"traddr=%s"		},
diff --git a/drivers/nvme/host/fabrics.h b/drivers/nvme/host/fabrics.h
index 888b108d87a4..d7f7974dc208 100644
--- a/drivers/nvme/host/fabrics.h
+++ b/drivers/nvme/host/fabrics.h
@@ -184,20 +184,7 @@ void nvmf_unregister_transport(struct nvmf_transport_ops *ops);
 void nvmf_free_options(struct nvmf_ctrl_options *opts);
 int nvmf_get_address(struct nvme_ctrl *ctrl, char *buf, int size);
 bool nvmf_should_reconnect(struct nvme_ctrl *ctrl);
-blk_status_t nvmf_fail_nonready_command(struct nvme_ctrl *ctrl,
-		struct request *rq);
-bool __nvmf_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
-		bool queue_live);
 bool nvmf_ip_options_match(struct nvme_ctrl *ctrl,
 		struct nvmf_ctrl_options *opts);
 
-static inline bool nvmf_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
-		bool queue_live)
-{
-	if (likely(ctrl->state == NVME_CTRL_LIVE ||
-		   ctrl->state == NVME_CTRL_DELETING))
-		return true;
-	return __nvmf_check_ready(ctrl, rq, queue_live);
-}
-
 #endif /* _NVME_FABRICS_H */
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 9b9b7be0f412..d9ab9e7871d0 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -2766,8 +2766,8 @@ nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx,
 	blk_status_t ret;
 
 	if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE ||
-	    !nvmf_check_ready(&queue->ctrl->ctrl, rq, queue_ready))
-		return nvmf_fail_nonready_command(&queue->ctrl->ctrl, rq);
+	    !nvme_check_ready(&queue->ctrl->ctrl, rq, queue_ready))
+		return nvme_fail_nonready_command(&queue->ctrl->ctrl, rq);
 
 	ret = nvme_setup_cmd(ns, rq);
 	if (ret)
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index c1e086a0bc3f..05f31a2c64bb 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -638,6 +638,21 @@ struct request *nvme_alloc_request(struct request_queue *q,
 		struct nvme_command *cmd, blk_mq_req_flags_t flags);
 void nvme_cleanup_cmd(struct request *req);
 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req);
+blk_status_t nvme_fail_nonready_command(struct nvme_ctrl *ctrl,
+		struct request *req);
+bool __nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
+		bool queue_live);
+
+static inline bool nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
+		bool queue_live)
+{
+	if (likely(ctrl->state == NVME_CTRL_LIVE))
+		return true;
+	if (ctrl->ops->flags & NVME_F_FABRICS &&
+	    ctrl->state == NVME_CTRL_DELETING)
+		return true;
+	return __nvme_check_ready(ctrl, rq, queue_live);
+}
 int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
 		void *buf, unsigned bufflen);
 int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 660c774fa9e1..37943dc4c2c1 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -2050,8 +2050,8 @@ static blk_status_t nvme_rdma_queue_rq(struct blk_mq_hw_ctx *hctx,
 
 	WARN_ON_ONCE(rq->tag < 0);
 
-	if (!nvmf_check_ready(&queue->ctrl->ctrl, rq, queue_ready))
-		return nvmf_fail_nonready_command(&queue->ctrl->ctrl, rq);
+	if (!nvme_check_ready(&queue->ctrl->ctrl, rq, queue_ready))
+		return nvme_fail_nonready_command(&queue->ctrl->ctrl, rq);
 
 	dev = queue->device->dev;
 
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index 75435cdb156c..0222e23f5936 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -2338,8 +2338,8 @@ static blk_status_t nvme_tcp_queue_rq(struct blk_mq_hw_ctx *hctx,
 	bool queue_ready = test_bit(NVME_TCP_Q_LIVE, &queue->flags);
 	blk_status_t ret;
 
-	if (!nvmf_check_ready(&queue->ctrl->ctrl, rq, queue_ready))
-		return nvmf_fail_nonready_command(&queue->ctrl->ctrl, rq);
+	if (!nvme_check_ready(&queue->ctrl->ctrl, rq, queue_ready))
+		return nvme_fail_nonready_command(&queue->ctrl->ctrl, rq);
 
 	ret = nvme_tcp_setup_cmd_pdu(ns, rq);
 	if (unlikely(ret))
diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c
index 6665da3b634f..74b3b150e1a5 100644
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c
@@ -138,8 +138,8 @@ static blk_status_t nvme_loop_queue_rq(struct blk_mq_hw_ctx *hctx,
 	bool queue_ready = test_bit(NVME_LOOP_Q_LIVE, &queue->flags);
 	blk_status_t ret;
 
-	if (!nvmf_check_ready(&queue->ctrl->ctrl, req, queue_ready))
-		return nvmf_fail_nonready_command(&queue->ctrl->ctrl, req);
+	if (!nvme_check_ready(&queue->ctrl->ctrl, req, queue_ready))
+		return nvme_fail_nonready_command(&queue->ctrl->ctrl, req);
 
 	ret = nvme_setup_cmd(ns, req);
 	if (ret)
-- 
cgit v1.2.3


From d4060d2be1132596154f31f4d57976bd103e969d Mon Sep 17 00:00:00 2001
From: Tao Chiu <taochiu@synology.com>
Date: Mon, 26 Apr 2021 10:53:55 +0800
Subject: nvme-pci: fix controller reset hang when racing with nvme_timeout

reset_work() in nvme-pci may hang forever in the following scenario:
1) A reset caused by a command timeout occurs due to a controller being
   temporarily irresponsive.
2) nvme_reset_work() restarts admin queue at nvme_alloc_admin_tags(). At
   the same time, a user-submitted admin command is queued and waiting
   for completion. Then, reset_work() changes its state to CONNECTING,
   and submits an identify command.
3) However, the controller does still not respond to any command,
   causing a timeout being fired at the user-submitted command.
   Unfortunately, nvme_timeout() does not see the completion on cq, and
   any timeout that takes place under CONNECTING state causes a
   controller shutdown.
4) Normally, the identify command in reset_work() would be canceled with
   SC_HOST_ABORTED by nvme_dev_disable(), then reset_work can tear down
   the controller accordingly. But the controller happens to return
   online and respond the identify command before nvme_dev_disable()
   should have been reaped it off.
5) reset_work() continues to setup_io_queues() as it observes no error
   in init_identify(). However, the admin queue has already been
   quiesced in dev_disable(). Thus, any following commands would be
   blocked forever in blk_execute_rq().

This can be fixed by restricting usercmd commands when controller is not
in a LIVE state in nvme_queue_rq(), as what has been done previously in
fabrics.

```
nvme_reset_work():                     |
    nvme_alloc_admin_tags()            |
                                       | nvme_submit_user_cmd():
    nvme_init_identify():              |     ...
        __nvme_submit_sync_cmd():      |
            ...                        |     ...
---------------------------------------> nvme_timeout():
(Controller starts reponding commands) |     nvme_dev_disable(, true):
    nvme_setup_io_queues():            |
        __nvme_submit_sync_cmd():      |
            (hung in blk_execute_rq    |
             since run_hw_queue sees   |
             queue quiesced)           |

```

Signed-off-by: Tao Chiu <taochiu@synology.com>
Signed-off-by: Cody Wong <codywong@synology.com>
Reviewed-by: Leon Chien <leonchien@synology.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/pci.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 09d4c5f99fc3..a29b170701fc 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -933,6 +933,9 @@ static blk_status_t nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
 	if (unlikely(!test_bit(NVMEQ_ENABLED, &nvmeq->flags)))
 		return BLK_STS_IOERR;
 
+	if (!nvme_check_ready(&dev->ctrl, req, true))
+		return nvme_fail_nonready_command(&dev->ctrl, req);
+
 	ret = nvme_setup_cmd(ns, req);
 	if (ret)
 		return ret;
-- 
cgit v1.2.3


From ce86dad222e9074d3ec174ec81cb463a770331b5 Mon Sep 17 00:00:00 2001
From: Daniel Wagner <dwagner@suse.de>
Date: Mon, 3 May 2021 19:03:03 +0200
Subject: nvme-multipath: reset bdev to ns head when failover

When a request finally completes in end_io() after it has failed over,
the bdev pointer can be stale and thus the system can crash. Set the
bdev back to ns head, so the request is map to an active path when
resubmitted.

Signed-off-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/multipath.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 0d0de3433f37..0551796517e6 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -70,6 +70,7 @@ void nvme_failover_req(struct request *req)
 	struct nvme_ns *ns = req->q->queuedata;
 	u16 status = nvme_req(req)->status & 0x7ff;
 	unsigned long flags;
+	struct bio *bio;
 
 	nvme_mpath_clear_current_path(ns);
 
@@ -84,6 +85,8 @@ void nvme_failover_req(struct request *req)
 	}
 
 	spin_lock_irqsave(&ns->head->requeue_lock, flags);
+	for (bio = req->bio; bio; bio = bio->bi_next)
+		bio_set_dev(bio, ns->head->disk->part0);
 	blk_steal_bios(&ns->head->requeue_list, req);
 	spin_unlock_irqrestore(&ns->head->requeue_lock, flags);
 
-- 
cgit v1.2.3


From 4a20342572f66c5b20a1ee680f5ac0a13703748f Mon Sep 17 00:00:00 2001
From: Keith Busch <kbusch@kernel.org>
Date: Wed, 28 Apr 2021 21:25:58 -0700
Subject: nvmet: remove unsupported command noise

Nothing can stop a host from submitting invalid commands. The target
just needs to respond with an appropriate status, but that's not a
target error. Demote invalid command messages to the debug level so
these events don't spam the kernel logs.

Reported-by: Yi Zhang <yi.zhang@redhat.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/target/admin-cmd.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c
index d2a26ff3f7b3..e7a367cf6d36 100644
--- a/drivers/nvme/target/admin-cmd.c
+++ b/drivers/nvme/target/admin-cmd.c
@@ -307,7 +307,7 @@ static void nvmet_execute_get_log_page(struct nvmet_req *req)
 	case NVME_LOG_ANA:
 		return nvmet_execute_get_log_page_ana(req);
 	}
-	pr_err("unhandled lid %d on qid %d\n",
+	pr_debug("unhandled lid %d on qid %d\n",
 	       req->cmd->get_log_page.lid, req->sq->qid);
 	req->error_loc = offsetof(struct nvme_get_log_page_command, lid);
 	nvmet_req_complete(req, NVME_SC_INVALID_FIELD | NVME_SC_DNR);
@@ -659,7 +659,7 @@ static void nvmet_execute_identify(struct nvmet_req *req)
 		return nvmet_execute_identify_desclist(req);
 	}
 
-	pr_err("unhandled identify cns %d on qid %d\n",
+	pr_debug("unhandled identify cns %d on qid %d\n",
 	       req->cmd->identify.cns, req->sq->qid);
 	req->error_loc = offsetof(struct nvme_identify, cns);
 	nvmet_req_complete(req, NVME_SC_INVALID_FIELD | NVME_SC_DNR);
@@ -977,7 +977,7 @@ u16 nvmet_parse_admin_cmd(struct nvmet_req *req)
 		return 0;
 	}
 
-	pr_err("unhandled cmd %d on qid %d\n", cmd->common.opcode,
+	pr_debug("unhandled cmd %d on qid %d\n", cmd->common.opcode,
 	       req->sq->qid);
 	req->error_loc = offsetof(struct nvme_common_command, opcode);
 	return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
-- 
cgit v1.2.3


From 0f8a0b0b095fd9b301523c0f78686f5ac6fda564 Mon Sep 17 00:00:00 2001
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: Tue, 4 May 2021 04:12:10 -0400
Subject: virtio_pci_modern: __force cast the notify mapping

When switching virtio_pci_modern to use a helper for mappings we lost an
__iomem tag. We should restore it.

However, virtio_pci_modern is playing tricks by hiding an iomem pointer
in a regular vq->priv pointer. Which is okay as long as it's
all contained within a single file, but we need to __force cast
the value otherwise we'll get sparse warnings.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 7dca6c0ea96b ("virtio-pci library: switch to use vp_modern_map_vq_notify()")
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/virtio/virtio_pci_modern.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index 722ea44e7579..30654d3a0b41 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -224,7 +224,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
 				virtqueue_get_avail_addr(vq),
 				virtqueue_get_used_addr(vq));
 
-	vq->priv = vp_modern_map_vq_notify(mdev, index, NULL);
+	vq->priv = (void __force *)vp_modern_map_vq_notify(mdev, index, NULL);
 	if (!vq->priv) {
 		err = -ENOMEM;
 		goto err_map_notify;
-- 
cgit v1.2.3


From d7bce85aa7b92b5de8f69b3bcedfe51d7b1aabe1 Mon Sep 17 00:00:00 2001
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: Tue, 4 May 2021 04:17:20 -0400
Subject: virtio_pci_modern: correct sparse tags for notify

When switching virtio_pci_modern to use a helper for mappings we lost an
__iomem tag. Restore it.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 9e3bb9b79a71 ("virtio_pci_modern: introduce helper to map vq notify area")
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/virtio/virtio_pci_modern_dev.c | 9 ++++-----
 include/linux/virtio_pci_modern.h      | 4 ++--
 2 files changed, 6 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/virtio/virtio_pci_modern_dev.c b/drivers/virtio/virtio_pci_modern_dev.c
index ae87b3fa8858..54f297028586 100644
--- a/drivers/virtio/virtio_pci_modern_dev.c
+++ b/drivers/virtio/virtio_pci_modern_dev.c
@@ -605,8 +605,8 @@ static u16 vp_modern_get_queue_notify_off(struct virtio_pci_modern_device *mdev,
  *
  * Returns the address of the notification area
  */
-void *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
-			      u16 index, resource_size_t *pa)
+void __iomem *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
+				      u16 index, resource_size_t *pa)
 {
 	u16 off = vp_modern_get_queue_notify_off(mdev, index);
 
@@ -624,10 +624,9 @@ void *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
 		if (pa)
 			*pa = mdev->notify_pa +
 			      off * mdev->notify_offset_multiplier;
-		return (void __force *)mdev->notify_base +
-			off * mdev->notify_offset_multiplier;
+		return mdev->notify_base + off * mdev->notify_offset_multiplier;
 	} else {
-		return (void __force *)vp_modern_map_capability(mdev,
+		return vp_modern_map_capability(mdev,
 				       mdev->notify_map_cap, 2, 2,
 				       off * mdev->notify_offset_multiplier, 2,
 				       NULL, pa);
diff --git a/include/linux/virtio_pci_modern.h b/include/linux/virtio_pci_modern.h
index cdfabbefacdf..6a95b58fd0f4 100644
--- a/include/linux/virtio_pci_modern.h
+++ b/include/linux/virtio_pci_modern.h
@@ -101,8 +101,8 @@ void vp_modern_set_queue_size(struct virtio_pci_modern_device *mdev,
 u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev,
 			     u16 idx);
 u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev);
-void *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
-                              u16 index, resource_size_t *pa);
+void __iomem * vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
+				       u16 index, resource_size_t *pa);
 int vp_modern_probe(struct virtio_pci_modern_device *mdev);
 void vp_modern_remove(struct virtio_pci_modern_device *mdev);
 #endif
-- 
cgit v1.2.3


From c61287bf17836b67e0b649343778bb4a659bd70d Mon Sep 17 00:00:00 2001
From: Greentime Hu <greentime.hu@sifive.com>
Date: Tue, 4 May 2021 18:59:35 +0800
Subject: clk: sifive: Add pcie_aux clock in prci driver for PCIe driver

We add pcie_aux clock in this patch so that pcie driver can use
clk_prepare_enable() and clk_disable_unprepare() to enable and disable
pcie_aux clock.

Link: https://lore.kernel.org/r/20210504105940.100004-2-greentime.hu@sifive.com
Signed-off-by: Greentime Hu <greentime.hu@sifive.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
---
 drivers/clk/sifive/fu740-prci.c               | 11 +++++++
 drivers/clk/sifive/fu740-prci.h               |  2 +-
 drivers/clk/sifive/sifive-prci.c              | 41 +++++++++++++++++++++++++++
 drivers/clk/sifive/sifive-prci.h              |  9 ++++++
 include/dt-bindings/clock/sifive-fu740-prci.h |  1 +
 5 files changed, 63 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/clk/sifive/fu740-prci.c b/drivers/clk/sifive/fu740-prci.c
index 764d1097aa51..53f6e00a03b9 100644
--- a/drivers/clk/sifive/fu740-prci.c
+++ b/drivers/clk/sifive/fu740-prci.c
@@ -72,6 +72,12 @@ static const struct clk_ops sifive_fu740_prci_hfpclkplldiv_clk_ops = {
 	.recalc_rate = sifive_prci_hfpclkplldiv_recalc_rate,
 };
 
+static const struct clk_ops sifive_fu740_prci_pcie_aux_clk_ops = {
+	.enable = sifive_prci_pcie_aux_clock_enable,
+	.disable = sifive_prci_pcie_aux_clock_disable,
+	.is_enabled = sifive_prci_pcie_aux_clock_is_enabled,
+};
+
 /* List of clock controls provided by the PRCI */
 struct __prci_clock __prci_init_clocks_fu740[] = {
 	[PRCI_CLK_COREPLL] = {
@@ -120,4 +126,9 @@ struct __prci_clock __prci_init_clocks_fu740[] = {
 		.parent_name = "hfpclkpll",
 		.ops = &sifive_fu740_prci_hfpclkplldiv_clk_ops,
 	},
+	[PRCI_CLK_PCIE_AUX] = {
+		.name = "pcie_aux",
+		.parent_name = "hfclk",
+		.ops = &sifive_fu740_prci_pcie_aux_clk_ops,
+	},
 };
diff --git a/drivers/clk/sifive/fu740-prci.h b/drivers/clk/sifive/fu740-prci.h
index 13ef971f7764..511a0bf7ba2b 100644
--- a/drivers/clk/sifive/fu740-prci.h
+++ b/drivers/clk/sifive/fu740-prci.h
@@ -9,7 +9,7 @@
 
 #include "sifive-prci.h"
 
-#define NUM_CLOCK_FU740	8
+#define NUM_CLOCK_FU740	9
 
 extern struct __prci_clock __prci_init_clocks_fu740[NUM_CLOCK_FU740];
 
diff --git a/drivers/clk/sifive/sifive-prci.c b/drivers/clk/sifive/sifive-prci.c
index 1490b01ce629..9997a3fa4a38 100644
--- a/drivers/clk/sifive/sifive-prci.c
+++ b/drivers/clk/sifive/sifive-prci.c
@@ -453,6 +453,47 @@ void sifive_prci_hfpclkpllsel_use_hfpclkpll(struct __prci_data *pd)
 	r = __prci_readl(pd, PRCI_HFPCLKPLLSEL_OFFSET);	/* barrier */
 }
 
+/* PCIE AUX clock APIs for enable, disable. */
+int sifive_prci_pcie_aux_clock_is_enabled(struct clk_hw *hw)
+{
+	struct __prci_clock *pc = clk_hw_to_prci_clock(hw);
+	struct __prci_data *pd = pc->pd;
+	u32 r;
+
+	r = __prci_readl(pd, PRCI_PCIE_AUX_OFFSET);
+
+	if (r & PRCI_PCIE_AUX_EN_MASK)
+		return 1;
+	else
+		return 0;
+}
+
+int sifive_prci_pcie_aux_clock_enable(struct clk_hw *hw)
+{
+	struct __prci_clock *pc = clk_hw_to_prci_clock(hw);
+	struct __prci_data *pd = pc->pd;
+	u32 r __maybe_unused;
+
+	if (sifive_prci_pcie_aux_clock_is_enabled(hw))
+		return 0;
+
+	__prci_writel(1, PRCI_PCIE_AUX_OFFSET, pd);
+	r = __prci_readl(pd, PRCI_PCIE_AUX_OFFSET);	/* barrier */
+
+	return 0;
+}
+
+void sifive_prci_pcie_aux_clock_disable(struct clk_hw *hw)
+{
+	struct __prci_clock *pc = clk_hw_to_prci_clock(hw);
+	struct __prci_data *pd = pc->pd;
+	u32 r __maybe_unused;
+
+	__prci_writel(0, PRCI_PCIE_AUX_OFFSET, pd);
+	r = __prci_readl(pd, PRCI_PCIE_AUX_OFFSET);	/* barrier */
+
+}
+
 /**
  * __prci_register_clocks() - register clock controls in the PRCI
  * @dev: Linux struct device
diff --git a/drivers/clk/sifive/sifive-prci.h b/drivers/clk/sifive/sifive-prci.h
index dbdbd1722688..022c67cf053c 100644
--- a/drivers/clk/sifive/sifive-prci.h
+++ b/drivers/clk/sifive/sifive-prci.h
@@ -67,6 +67,11 @@
 #define PRCI_DDRPLLCFG1_CKE_SHIFT	31
 #define PRCI_DDRPLLCFG1_CKE_MASK	(0x1 << PRCI_DDRPLLCFG1_CKE_SHIFT)
 
+/* PCIEAUX */
+#define PRCI_PCIE_AUX_OFFSET		0x14
+#define PRCI_PCIE_AUX_EN_SHIFT		0
+#define PRCI_PCIE_AUX_EN_MASK		(0x1 << PRCI_PCIE_AUX_EN_SHIFT)
+
 /* GEMGXLPLLCFG0 */
 #define PRCI_GEMGXLPLLCFG0_OFFSET	0x1c
 #define PRCI_GEMGXLPLLCFG0_DIVR_SHIFT	0
@@ -296,4 +301,8 @@ unsigned long sifive_prci_tlclksel_recalc_rate(struct clk_hw *hw,
 unsigned long sifive_prci_hfpclkplldiv_recalc_rate(struct clk_hw *hw,
 						   unsigned long parent_rate);
 
+int sifive_prci_pcie_aux_clock_is_enabled(struct clk_hw *hw);
+int sifive_prci_pcie_aux_clock_enable(struct clk_hw *hw);
+void sifive_prci_pcie_aux_clock_disable(struct clk_hw *hw);
+
 #endif /* __SIFIVE_CLK_SIFIVE_PRCI_H */
diff --git a/include/dt-bindings/clock/sifive-fu740-prci.h b/include/dt-bindings/clock/sifive-fu740-prci.h
index cd7706ea5677..7899b7fee7db 100644
--- a/include/dt-bindings/clock/sifive-fu740-prci.h
+++ b/include/dt-bindings/clock/sifive-fu740-prci.h
@@ -19,5 +19,6 @@
 #define PRCI_CLK_CLTXPLL	       5
 #define PRCI_CLK_TLCLK		       6
 #define PRCI_CLK_PCLK		       7
+#define PRCI_CLK_PCIE_AUX	       8
 
 #endif	/* __DT_BINDINGS_CLOCK_SIFIVE_FU740_PRCI_H */
-- 
cgit v1.2.3


From e4d368e0b632717e57d064ade6afdcf535e58068 Mon Sep 17 00:00:00 2001
From: Greentime Hu <greentime.hu@sifive.com>
Date: Tue, 4 May 2021 18:59:36 +0800
Subject: clk: sifive: Use reset-simple in prci driver for PCIe driver

We use reset-simple in this patch so that pcie driver can use
devm_reset_control_get() to get this reset data structure and use
reset_control_deassert() to deassert pcie_power_up_rst_n.

Link: https://lore.kernel.org/r/20210504105940.100004-3-greentime.hu@sifive.com
Signed-off-by: Greentime Hu <greentime.hu@sifive.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Stephen Boyd <sboyd@kernel.org>
---
 drivers/clk/sifive/Kconfig       |  2 ++
 drivers/clk/sifive/sifive-prci.c | 13 +++++++++++++
 drivers/clk/sifive/sifive-prci.h |  4 ++++
 drivers/reset/Kconfig            |  1 +
 4 files changed, 20 insertions(+)

(limited to 'drivers')

diff --git a/drivers/clk/sifive/Kconfig b/drivers/clk/sifive/Kconfig
index 1c14eb20c066..9132c3c4aa86 100644
--- a/drivers/clk/sifive/Kconfig
+++ b/drivers/clk/sifive/Kconfig
@@ -10,6 +10,8 @@ if CLK_SIFIVE
 
 config CLK_SIFIVE_PRCI
 	bool "PRCI driver for SiFive SoCs"
+	select RESET_CONTROLLER
+	select RESET_SIMPLE
 	select CLK_ANALOGBITS_WRPLL_CLN28HPC
 	help
 	  Supports the Power Reset Clock interface (PRCI) IP block found in
diff --git a/drivers/clk/sifive/sifive-prci.c b/drivers/clk/sifive/sifive-prci.c
index 9997a3fa4a38..0d79ba31a793 100644
--- a/drivers/clk/sifive/sifive-prci.c
+++ b/drivers/clk/sifive/sifive-prci.c
@@ -588,6 +588,19 @@ static int sifive_prci_probe(struct platform_device *pdev)
 	if (IS_ERR(pd->va))
 		return PTR_ERR(pd->va);
 
+	pd->reset.rcdev.owner = THIS_MODULE;
+	pd->reset.rcdev.nr_resets = PRCI_RST_NR;
+	pd->reset.rcdev.ops = &reset_simple_ops;
+	pd->reset.rcdev.of_node = pdev->dev.of_node;
+	pd->reset.active_low = true;
+	pd->reset.membase = pd->va + PRCI_DEVICESRESETREG_OFFSET;
+	spin_lock_init(&pd->reset.lock);
+
+	r = devm_reset_controller_register(&pdev->dev, &pd->reset.rcdev);
+	if (r) {
+		dev_err(dev, "could not register reset controller: %d\n", r);
+		return r;
+	}
 	r = __prci_register_clocks(dev, pd, desc);
 	if (r) {
 		dev_err(dev, "could not register clocks: %d\n", r);
diff --git a/drivers/clk/sifive/sifive-prci.h b/drivers/clk/sifive/sifive-prci.h
index 022c67cf053c..91658a88af4e 100644
--- a/drivers/clk/sifive/sifive-prci.h
+++ b/drivers/clk/sifive/sifive-prci.h
@@ -11,6 +11,7 @@
 
 #include <linux/clk/analogbits-wrpll-cln28hpc.h>
 #include <linux/clk-provider.h>
+#include <linux/reset/reset-simple.h>
 #include <linux/platform_device.h>
 
 /*
@@ -121,6 +122,8 @@
 #define PRCI_DEVICESRESETREG_CHIPLINK_RST_N_MASK			\
 		(0x1 << PRCI_DEVICESRESETREG_CHIPLINK_RST_N_SHIFT)
 
+#define PRCI_RST_NR						7
+
 /* CLKMUXSTATUSREG */
 #define PRCI_CLKMUXSTATUSREG_OFFSET				0x2c
 #define PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_SHIFT		1
@@ -221,6 +224,7 @@
  */
 struct __prci_data {
 	void __iomem *va;
+	struct reset_simple_data reset;
 	struct clk_hw_onecell_data hw_clks;
 };
 
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index 4171c6f76385..0f40dadf5705 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -197,6 +197,7 @@ config RESET_SIMPLE
 	   - RCC reset controller in STM32 MCUs
 	   - Allwinner SoCs
 	   - ZTE's zx2967 family
+	   - SiFive FU740 SoCs
 
 config RESET_STM32MP157
 	bool "STM32MP157 Reset Driver" if COMPILE_TEST
-- 
cgit v1.2.3


From e7e21b3a339bd1b3c1d951b37be5e322c5c0dbf2 Mon Sep 17 00:00:00 2001
From: Paul Walmsley <paul.walmsley@sifive.com>
Date: Tue, 4 May 2021 18:59:39 +0800
Subject: PCI: fu740: Add SiFive FU740 PCIe host controller driver

Add driver for the SiFive FU740 PCIe host controller.
This controller is based on the DesignWare PCIe core.

Co-developed-by: Henry Styles <hes@sifive.com>
Co-developed-by: Erik Danie <erik.danie@sifive.com>
Co-developed-by: Greentime Hu <greentime.hu@sifive.com>
Link: https://lore.kernel.org/r/20210504105940.100004-6-greentime.hu@sifive.com
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Signed-off-by: Henry Styles <hes@sifive.com>
Signed-off-by: Erik Danie <erik.danie@sifive.com>
Signed-off-by: Greentime Hu <greentime.hu@sifive.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
---
 drivers/pci/controller/dwc/Kconfig      |   9 +
 drivers/pci/controller/dwc/Makefile     |   1 +
 drivers/pci/controller/dwc/pcie-fu740.c | 309 ++++++++++++++++++++++++++++++++
 3 files changed, 319 insertions(+)
 create mode 100644 drivers/pci/controller/dwc/pcie-fu740.c

(limited to 'drivers')

diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
index 22c5529e9a65..0a37d21ed64e 100644
--- a/drivers/pci/controller/dwc/Kconfig
+++ b/drivers/pci/controller/dwc/Kconfig
@@ -318,4 +318,13 @@ config PCIE_AL
 	  required only for DT-based platforms. ACPI platforms with the
 	  Annapurna Labs PCIe controller don't need to enable this.
 
+config PCIE_FU740
+	bool "SiFive FU740 PCIe host controller"
+	depends on PCI_MSI_IRQ_DOMAIN
+	depends on SOC_SIFIVE || COMPILE_TEST
+	select PCIE_DW_HOST
+	help
+	  Say Y here if you want PCIe controller support for the SiFive
+	  FU740.
+
 endmenu
diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
index a751553fa0db..625f6aaeb5b8 100644
--- a/drivers/pci/controller/dwc/Makefile
+++ b/drivers/pci/controller/dwc/Makefile
@@ -5,6 +5,7 @@ obj-$(CONFIG_PCIE_DW_EP) += pcie-designware-ep.o
 obj-$(CONFIG_PCIE_DW_PLAT) += pcie-designware-plat.o
 obj-$(CONFIG_PCI_DRA7XX) += pci-dra7xx.o
 obj-$(CONFIG_PCI_EXYNOS) += pci-exynos.o
+obj-$(CONFIG_PCIE_FU740) += pcie-fu740.o
 obj-$(CONFIG_PCI_IMX6) += pci-imx6.o
 obj-$(CONFIG_PCIE_SPEAR13XX) += pcie-spear13xx.o
 obj-$(CONFIG_PCI_KEYSTONE) += pci-keystone.o
diff --git a/drivers/pci/controller/dwc/pcie-fu740.c b/drivers/pci/controller/dwc/pcie-fu740.c
new file mode 100644
index 000000000000..00cde9a248b5
--- /dev/null
+++ b/drivers/pci/controller/dwc/pcie-fu740.c
@@ -0,0 +1,309 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * FU740 DesignWare PCIe Controller integration
+ * Copyright (C) 2019-2021 SiFive, Inc.
+ * Paul Walmsley
+ * Greentime Hu
+ *
+ * Based in part on the i.MX6 PCIe host controller shim which is:
+ *
+ * Copyright (C) 2013 Kosagi
+ *		https://www.kosagi.com
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/resource.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/iopoll.h>
+#include <linux/reset.h>
+
+#include "pcie-designware.h"
+
+#define to_fu740_pcie(x)	dev_get_drvdata((x)->dev)
+
+struct fu740_pcie {
+	struct dw_pcie pci;
+	void __iomem *mgmt_base;
+	struct gpio_desc *reset;
+	struct gpio_desc *pwren;
+	struct clk *pcie_aux;
+	struct reset_control *rst;
+};
+
+#define SIFIVE_DEVICESRESETREG		0x28
+
+#define PCIEX8MGMT_PERST_N		0x0
+#define PCIEX8MGMT_APP_LTSSM_ENABLE	0x10
+#define PCIEX8MGMT_APP_HOLD_PHY_RST	0x18
+#define PCIEX8MGMT_DEVICE_TYPE		0x708
+#define PCIEX8MGMT_PHY0_CR_PARA_ADDR	0x860
+#define PCIEX8MGMT_PHY0_CR_PARA_RD_EN	0x870
+#define PCIEX8MGMT_PHY0_CR_PARA_RD_DATA	0x878
+#define PCIEX8MGMT_PHY0_CR_PARA_SEL	0x880
+#define PCIEX8MGMT_PHY0_CR_PARA_WR_DATA	0x888
+#define PCIEX8MGMT_PHY0_CR_PARA_WR_EN	0x890
+#define PCIEX8MGMT_PHY0_CR_PARA_ACK	0x898
+#define PCIEX8MGMT_PHY1_CR_PARA_ADDR	0x8a0
+#define PCIEX8MGMT_PHY1_CR_PARA_RD_EN	0x8b0
+#define PCIEX8MGMT_PHY1_CR_PARA_RD_DATA	0x8b8
+#define PCIEX8MGMT_PHY1_CR_PARA_SEL	0x8c0
+#define PCIEX8MGMT_PHY1_CR_PARA_WR_DATA	0x8c8
+#define PCIEX8MGMT_PHY1_CR_PARA_WR_EN	0x8d0
+#define PCIEX8MGMT_PHY1_CR_PARA_ACK	0x8d8
+
+#define PCIEX8MGMT_PHY_CDR_TRACK_EN	BIT(0)
+#define PCIEX8MGMT_PHY_LOS_THRSHLD	BIT(5)
+#define PCIEX8MGMT_PHY_TERM_EN		BIT(9)
+#define PCIEX8MGMT_PHY_TERM_ACDC	BIT(10)
+#define PCIEX8MGMT_PHY_EN		BIT(11)
+#define PCIEX8MGMT_PHY_INIT_VAL		(PCIEX8MGMT_PHY_CDR_TRACK_EN|\
+					 PCIEX8MGMT_PHY_LOS_THRSHLD|\
+					 PCIEX8MGMT_PHY_TERM_EN|\
+					 PCIEX8MGMT_PHY_TERM_ACDC|\
+					 PCIEX8MGMT_PHY_EN)
+
+#define PCIEX8MGMT_PHY_LANEN_DIG_ASIC_RX_OVRD_IN_3	0x1008
+#define PCIEX8MGMT_PHY_LANE_OFF		0x100
+#define PCIEX8MGMT_PHY_LANE0_BASE	(PCIEX8MGMT_PHY_LANEN_DIG_ASIC_RX_OVRD_IN_3 + 0x100 * 0)
+#define PCIEX8MGMT_PHY_LANE1_BASE	(PCIEX8MGMT_PHY_LANEN_DIG_ASIC_RX_OVRD_IN_3 + 0x100 * 1)
+#define PCIEX8MGMT_PHY_LANE2_BASE	(PCIEX8MGMT_PHY_LANEN_DIG_ASIC_RX_OVRD_IN_3 + 0x100 * 2)
+#define PCIEX8MGMT_PHY_LANE3_BASE	(PCIEX8MGMT_PHY_LANEN_DIG_ASIC_RX_OVRD_IN_3 + 0x100 * 3)
+
+static void fu740_pcie_assert_reset(struct fu740_pcie *afp)
+{
+	/* Assert PERST_N GPIO */
+	gpiod_set_value_cansleep(afp->reset, 0);
+	/* Assert controller PERST_N */
+	writel_relaxed(0x0, afp->mgmt_base + PCIEX8MGMT_PERST_N);
+}
+
+static void fu740_pcie_deassert_reset(struct fu740_pcie *afp)
+{
+	/* Deassert controller PERST_N */
+	writel_relaxed(0x1, afp->mgmt_base + PCIEX8MGMT_PERST_N);
+	/* Deassert PERST_N GPIO */
+	gpiod_set_value_cansleep(afp->reset, 1);
+}
+
+static void fu740_pcie_power_on(struct fu740_pcie *afp)
+{
+	gpiod_set_value_cansleep(afp->pwren, 1);
+	/*
+	 * Ensure that PERST has been asserted for at least 100 ms.
+	 * Section 2.2 of PCI Express Card Electromechanical Specification
+	 * Revision 3.0
+	 */
+	msleep(100);
+}
+
+static void fu740_pcie_drive_reset(struct fu740_pcie *afp)
+{
+	fu740_pcie_assert_reset(afp);
+	fu740_pcie_power_on(afp);
+	fu740_pcie_deassert_reset(afp);
+}
+
+static void fu740_phyregwrite(const uint8_t phy, const uint16_t addr,
+			      const uint16_t wrdata, struct fu740_pcie *afp)
+{
+	struct device *dev = afp->pci.dev;
+	void __iomem *phy_cr_para_addr;
+	void __iomem *phy_cr_para_wr_data;
+	void __iomem *phy_cr_para_wr_en;
+	void __iomem *phy_cr_para_ack;
+	int ret, val;
+
+	/* Setup */
+	if (phy) {
+		phy_cr_para_addr = afp->mgmt_base + PCIEX8MGMT_PHY1_CR_PARA_ADDR;
+		phy_cr_para_wr_data = afp->mgmt_base + PCIEX8MGMT_PHY1_CR_PARA_WR_DATA;
+		phy_cr_para_wr_en = afp->mgmt_base + PCIEX8MGMT_PHY1_CR_PARA_WR_EN;
+		phy_cr_para_ack = afp->mgmt_base + PCIEX8MGMT_PHY1_CR_PARA_ACK;
+	} else {
+		phy_cr_para_addr = afp->mgmt_base + PCIEX8MGMT_PHY0_CR_PARA_ADDR;
+		phy_cr_para_wr_data = afp->mgmt_base + PCIEX8MGMT_PHY0_CR_PARA_WR_DATA;
+		phy_cr_para_wr_en = afp->mgmt_base + PCIEX8MGMT_PHY0_CR_PARA_WR_EN;
+		phy_cr_para_ack = afp->mgmt_base + PCIEX8MGMT_PHY0_CR_PARA_ACK;
+	}
+
+	writel_relaxed(addr, phy_cr_para_addr);
+	writel_relaxed(wrdata, phy_cr_para_wr_data);
+	writel_relaxed(1, phy_cr_para_wr_en);
+
+	/* Wait for wait_idle */
+	ret = readl_poll_timeout(phy_cr_para_ack, val, val, 10, 5000);
+	if (ret)
+		dev_warn(dev, "Wait for wait_idle state failed!\n");
+
+	/* Clear */
+	writel_relaxed(0, phy_cr_para_wr_en);
+
+	/* Wait for ~wait_idle */
+	ret = readl_poll_timeout(phy_cr_para_ack, val, !val, 10, 5000);
+	if (ret)
+		dev_warn(dev, "Wait for !wait_idle state failed!\n");
+}
+
+static void fu740_pcie_init_phy(struct fu740_pcie *afp)
+{
+	/* Enable phy cr_para_sel interfaces */
+	writel_relaxed(0x1, afp->mgmt_base + PCIEX8MGMT_PHY0_CR_PARA_SEL);
+	writel_relaxed(0x1, afp->mgmt_base + PCIEX8MGMT_PHY1_CR_PARA_SEL);
+
+	/*
+	 * Wait 10 cr_para cycles to guarantee that the registers are ready
+	 * to be edited.
+	 */
+	ndelay(10);
+
+	/* Set PHY AC termination mode */
+	fu740_phyregwrite(0, PCIEX8MGMT_PHY_LANE0_BASE, PCIEX8MGMT_PHY_INIT_VAL, afp);
+	fu740_phyregwrite(0, PCIEX8MGMT_PHY_LANE1_BASE, PCIEX8MGMT_PHY_INIT_VAL, afp);
+	fu740_phyregwrite(0, PCIEX8MGMT_PHY_LANE2_BASE, PCIEX8MGMT_PHY_INIT_VAL, afp);
+	fu740_phyregwrite(0, PCIEX8MGMT_PHY_LANE3_BASE, PCIEX8MGMT_PHY_INIT_VAL, afp);
+	fu740_phyregwrite(1, PCIEX8MGMT_PHY_LANE0_BASE, PCIEX8MGMT_PHY_INIT_VAL, afp);
+	fu740_phyregwrite(1, PCIEX8MGMT_PHY_LANE1_BASE, PCIEX8MGMT_PHY_INIT_VAL, afp);
+	fu740_phyregwrite(1, PCIEX8MGMT_PHY_LANE2_BASE, PCIEX8MGMT_PHY_INIT_VAL, afp);
+	fu740_phyregwrite(1, PCIEX8MGMT_PHY_LANE3_BASE, PCIEX8MGMT_PHY_INIT_VAL, afp);
+}
+
+static int fu740_pcie_start_link(struct dw_pcie *pci)
+{
+	struct device *dev = pci->dev;
+	struct fu740_pcie *afp = dev_get_drvdata(dev);
+
+	/* Enable LTSSM */
+	writel_relaxed(0x1, afp->mgmt_base + PCIEX8MGMT_APP_LTSSM_ENABLE);
+	return 0;
+}
+
+static int fu740_pcie_host_init(struct pcie_port *pp)
+{
+	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+	struct fu740_pcie *afp = to_fu740_pcie(pci);
+	struct device *dev = pci->dev;
+	int ret;
+
+	/* Power on reset */
+	fu740_pcie_drive_reset(afp);
+
+	/* Enable pcieauxclk */
+	ret = clk_prepare_enable(afp->pcie_aux);
+	if (ret) {
+		dev_err(dev, "unable to enable pcie_aux clock\n");
+		return ret;
+	}
+
+	/*
+	 * Assert hold_phy_rst (hold the controller LTSSM in reset after
+	 * power_up_rst_n for register programming with cr_para)
+	 */
+	writel_relaxed(0x1, afp->mgmt_base + PCIEX8MGMT_APP_HOLD_PHY_RST);
+
+	/* Deassert power_up_rst_n */
+	ret = reset_control_deassert(afp->rst);
+	if (ret) {
+		dev_err(dev, "unable to deassert pcie_power_up_rst_n\n");
+		return ret;
+	}
+
+	fu740_pcie_init_phy(afp);
+
+	/* Disable pcieauxclk */
+	clk_disable_unprepare(afp->pcie_aux);
+	/* Clear hold_phy_rst */
+	writel_relaxed(0x0, afp->mgmt_base + PCIEX8MGMT_APP_HOLD_PHY_RST);
+	/* Enable pcieauxclk */
+	ret = clk_prepare_enable(afp->pcie_aux);
+	/* Set RC mode */
+	writel_relaxed(0x4, afp->mgmt_base + PCIEX8MGMT_DEVICE_TYPE);
+
+	return 0;
+}
+
+static const struct dw_pcie_host_ops fu740_pcie_host_ops = {
+	.host_init = fu740_pcie_host_init,
+};
+
+static const struct dw_pcie_ops dw_pcie_ops = {
+	.start_link = fu740_pcie_start_link,
+};
+
+static int fu740_pcie_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct dw_pcie *pci;
+	struct fu740_pcie *afp;
+
+	afp = devm_kzalloc(dev, sizeof(*afp), GFP_KERNEL);
+	if (!afp)
+		return -ENOMEM;
+	pci = &afp->pci;
+	pci->dev = dev;
+	pci->ops = &dw_pcie_ops;
+	pci->pp.ops = &fu740_pcie_host_ops;
+
+	/* SiFive specific region: mgmt */
+	afp->mgmt_base = devm_platform_ioremap_resource_byname(pdev, "mgmt");
+	if (IS_ERR(afp->mgmt_base))
+		return PTR_ERR(afp->mgmt_base);
+
+	/* Fetch GPIOs */
+	afp->reset = devm_gpiod_get_optional(dev, "reset-gpios", GPIOD_OUT_LOW);
+	if (IS_ERR(afp->reset))
+		return dev_err_probe(dev, PTR_ERR(afp->reset), "unable to get reset-gpios\n");
+
+	afp->pwren = devm_gpiod_get_optional(dev, "pwren-gpios", GPIOD_OUT_LOW);
+	if (IS_ERR(afp->pwren))
+		return dev_err_probe(dev, PTR_ERR(afp->pwren), "unable to get pwren-gpios\n");
+
+	/* Fetch clocks */
+	afp->pcie_aux = devm_clk_get(dev, "pcie_aux");
+	if (IS_ERR(afp->pcie_aux))
+		return dev_err_probe(dev, PTR_ERR(afp->pcie_aux),
+					     "pcie_aux clock source missing or invalid\n");
+
+	/* Fetch reset */
+	afp->rst = devm_reset_control_get_exclusive(dev, NULL);
+	if (IS_ERR(afp->rst))
+		return dev_err_probe(dev, PTR_ERR(afp->rst), "unable to get reset\n");
+
+	platform_set_drvdata(pdev, afp);
+
+	return dw_pcie_host_init(&pci->pp);
+}
+
+static void fu740_pcie_shutdown(struct platform_device *pdev)
+{
+	struct fu740_pcie *afp = platform_get_drvdata(pdev);
+
+	/* Bring down link, so bootloader gets clean state in case of reboot */
+	fu740_pcie_assert_reset(afp);
+}
+
+static const struct of_device_id fu740_pcie_of_match[] = {
+	{ .compatible = "sifive,fu740-pcie", },
+	{},
+};
+
+static struct platform_driver fu740_pcie_driver = {
+	.driver = {
+		   .name = "fu740-pcie",
+		   .of_match_table = fu740_pcie_of_match,
+		   .suppress_bind_attrs = true,
+	},
+	.probe = fu740_pcie_probe,
+	.shutdown = fu740_pcie_shutdown,
+};
+
+builtin_platform_driver(fu740_pcie_driver);
-- 
cgit v1.2.3


From 0d82fb1127fb7cc8287614eb0992acb0583bc323 Mon Sep 17 00:00:00 2001
From: Sander Vanheule <sander@svanheule.net>
Date: Tue, 30 Mar 2021 19:48:43 +0200
Subject: gpio: Add Realtek Otto GPIO support

Realtek MIPS SoCs (platform name Otto) have GPIO controllers with up to
64 GPIOs, divided over two banks. Each bank has a set of registers for
32 GPIOs, with support for edge-triggered interrupts.

Each GPIO bank consists of four 8-bit GPIO ports (ABCD and EFGH). Most
registers pack one bit per GPIO, except for the IMR register, which
packs two bits per GPIO (AB-CD).

Although the byte order is currently assumed to have port A..D at offset
0x0..0x3, this has been observed to be reversed on other, Lexra-based,
SoCs (e.g. RTL8196E/97D/97F).

Interrupt support is disabled for the fallback devicetree-compatible
'realtek,otto-gpio'. This allows for quick support of GPIO banks in
which the byte order would be unknown. In this case, the port ordering
in the IMR registers may not match the reversed order in the other
registers (DCBA, and BA-DC or DC-BA).

Signed-off-by: Sander Vanheule <sander@svanheule.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/gpio/Kconfig             |  13 ++
 drivers/gpio/Makefile            |   1 +
 drivers/gpio/gpio-realtek-otto.c | 325 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 339 insertions(+)
 create mode 100644 drivers/gpio/gpio-realtek-otto.c

(limited to 'drivers')

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index e3607ec4c2e8..6fb13d6507db 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -502,6 +502,19 @@ config GPIO_RDA
 	help
 	  Say Y here to support RDA Micro GPIO controller.
 
+config GPIO_REALTEK_OTTO
+	tristate "Realtek Otto GPIO support"
+	depends on MACH_REALTEK_RTL
+	default MACH_REALTEK_RTL
+	select GPIO_GENERIC
+	select GPIOLIB_IRQCHIP
+	help
+	  The GPIO controller on the Otto MIPS platform supports up to two
+	  banks of 32 GPIOs, with edge triggered interrupts. The 32 GPIOs
+	  are grouped in four 8-bit wide ports.
+
+	  When built as a module, the module will be called realtek_otto_gpio.
+
 config GPIO_REG
 	bool
 	help
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index c58a90a3c3b1..8ace5934e3c3 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -124,6 +124,7 @@ obj-$(CONFIG_GPIO_RC5T583)		+= gpio-rc5t583.o
 obj-$(CONFIG_GPIO_RCAR)			+= gpio-rcar.o
 obj-$(CONFIG_GPIO_RDA)			+= gpio-rda.o
 obj-$(CONFIG_GPIO_RDC321X)		+= gpio-rdc321x.o
+obj-$(CONFIG_GPIO_REALTEK_OTTO)		+= gpio-realtek-otto.o
 obj-$(CONFIG_GPIO_REG)			+= gpio-reg.o
 obj-$(CONFIG_ARCH_SA1100)		+= gpio-sa1100.o
 obj-$(CONFIG_GPIO_SAMA5D2_PIOBU)	+= gpio-sama5d2-piobu.o
diff --git a/drivers/gpio/gpio-realtek-otto.c b/drivers/gpio/gpio-realtek-otto.c
new file mode 100644
index 000000000000..cb64fb5a51aa
--- /dev/null
+++ b/drivers/gpio/gpio-realtek-otto.c
@@ -0,0 +1,325 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/gpio/driver.h>
+#include <linux/irq.h>
+#include <linux/minmax.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+
+/*
+ * Total register block size is 0x1C for one bank of four ports (A, B, C, D).
+ * An optional second bank, with ports E, F, G, and H, may be present, starting
+ * at register offset 0x1C.
+ */
+
+/*
+ * Pin select: (0) "normal", (1) "dedicate peripheral"
+ * Not used on RTL8380/RTL8390, peripheral selection is managed by control bits
+ * in the peripheral registers.
+ */
+#define REALTEK_GPIO_REG_CNR		0x00
+/* Clear bit (0) for input, set bit (1) for output */
+#define REALTEK_GPIO_REG_DIR		0x08
+#define REALTEK_GPIO_REG_DATA		0x0C
+/* Read bit for IRQ status, write 1 to clear IRQ */
+#define REALTEK_GPIO_REG_ISR		0x10
+/* Two bits per GPIO in IMR registers */
+#define REALTEK_GPIO_REG_IMR		0x14
+#define REALTEK_GPIO_REG_IMR_AB		0x14
+#define REALTEK_GPIO_REG_IMR_CD		0x18
+#define REALTEK_GPIO_IMR_LINE_MASK	GENMASK(1, 0)
+#define REALTEK_GPIO_IRQ_EDGE_FALLING	1
+#define REALTEK_GPIO_IRQ_EDGE_RISING	2
+#define REALTEK_GPIO_IRQ_EDGE_BOTH	3
+
+#define REALTEK_GPIO_MAX		32
+#define REALTEK_GPIO_PORTS_PER_BANK	4
+
+/**
+ * realtek_gpio_ctrl - Realtek Otto GPIO driver data
+ *
+ * @gc: Associated gpio_chip instance
+ * @base: Base address of the register block for a GPIO bank
+ * @lock: Lock for accessing the IRQ registers and values
+ * @intr_mask: Mask for interrupts lines
+ * @intr_type: Interrupt type selection
+ *
+ * Because the interrupt mask register (IMR) combines the function of IRQ type
+ * selection and masking, two extra values are stored. @intr_mask is used to
+ * mask/unmask the interrupts for a GPIO port, and @intr_type is used to store
+ * the selected interrupt types. The logical AND of these values is written to
+ * IMR on changes.
+ */
+struct realtek_gpio_ctrl {
+	struct gpio_chip gc;
+	void __iomem *base;
+	raw_spinlock_t lock;
+	u16 intr_mask[REALTEK_GPIO_PORTS_PER_BANK];
+	u16 intr_type[REALTEK_GPIO_PORTS_PER_BANK];
+};
+
+/* Expand with more flags as devices with other quirks are added */
+enum realtek_gpio_flags {
+	/*
+	 * Allow disabling interrupts, for cases where the port order is
+	 * unknown. This may result in a port mismatch between ISR and IMR.
+	 * An interrupt would appear to come from a different line than the
+	 * line the IRQ handler was assigned to, causing uncaught interrupts.
+	 */
+	GPIO_INTERRUPTS_DISABLED = BIT(0),
+};
+
+static struct realtek_gpio_ctrl *irq_data_to_ctrl(struct irq_data *data)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
+
+	return container_of(gc, struct realtek_gpio_ctrl, gc);
+}
+
+/*
+ * Normal port order register access
+ *
+ * Port information is stored with the first port at offset 0, followed by the
+ * second, etc. Most registers store one bit per GPIO and use a u8 value per
+ * port. The two interrupt mask registers store two bits per GPIO, so use u16
+ * values.
+ */
+static void realtek_gpio_write_imr(struct realtek_gpio_ctrl *ctrl,
+	unsigned int port, u16 irq_type, u16 irq_mask)
+{
+	iowrite16(irq_type & irq_mask, ctrl->base + REALTEK_GPIO_REG_IMR + 2 * port);
+}
+
+static void realtek_gpio_clear_isr(struct realtek_gpio_ctrl *ctrl,
+	unsigned int port, u8 mask)
+{
+	iowrite8(mask, ctrl->base + REALTEK_GPIO_REG_ISR + port);
+}
+
+static u8 realtek_gpio_read_isr(struct realtek_gpio_ctrl *ctrl, unsigned int port)
+{
+	return ioread8(ctrl->base + REALTEK_GPIO_REG_ISR + port);
+}
+
+/* Set the rising and falling edge mask bits for a GPIO port pin */
+static u16 realtek_gpio_imr_bits(unsigned int pin, u16 value)
+{
+	return (value & REALTEK_GPIO_IMR_LINE_MASK) << 2 * pin;
+}
+
+static void realtek_gpio_irq_ack(struct irq_data *data)
+{
+	struct realtek_gpio_ctrl *ctrl = irq_data_to_ctrl(data);
+	irq_hw_number_t line = irqd_to_hwirq(data);
+	unsigned int port = line / 8;
+	unsigned int port_pin = line % 8;
+
+	realtek_gpio_clear_isr(ctrl, port, BIT(port_pin));
+}
+
+static void realtek_gpio_irq_unmask(struct irq_data *data)
+{
+	struct realtek_gpio_ctrl *ctrl = irq_data_to_ctrl(data);
+	unsigned int line = irqd_to_hwirq(data);
+	unsigned int port = line / 8;
+	unsigned int port_pin = line % 8;
+	unsigned long flags;
+	u16 m;
+
+	raw_spin_lock_irqsave(&ctrl->lock, flags);
+	m = ctrl->intr_mask[port];
+	m |= realtek_gpio_imr_bits(port_pin, REALTEK_GPIO_IMR_LINE_MASK);
+	ctrl->intr_mask[port] = m;
+	realtek_gpio_write_imr(ctrl, port, ctrl->intr_type[port], m);
+	raw_spin_unlock_irqrestore(&ctrl->lock, flags);
+}
+
+static void realtek_gpio_irq_mask(struct irq_data *data)
+{
+	struct realtek_gpio_ctrl *ctrl = irq_data_to_ctrl(data);
+	unsigned int line = irqd_to_hwirq(data);
+	unsigned int port = line / 8;
+	unsigned int port_pin = line % 8;
+	unsigned long flags;
+	u16 m;
+
+	raw_spin_lock_irqsave(&ctrl->lock, flags);
+	m = ctrl->intr_mask[port];
+	m &= ~realtek_gpio_imr_bits(port_pin, REALTEK_GPIO_IMR_LINE_MASK);
+	ctrl->intr_mask[port] = m;
+	realtek_gpio_write_imr(ctrl, port, ctrl->intr_type[port], m);
+	raw_spin_unlock_irqrestore(&ctrl->lock, flags);
+}
+
+static int realtek_gpio_irq_set_type(struct irq_data *data, unsigned int flow_type)
+{
+	struct realtek_gpio_ctrl *ctrl = irq_data_to_ctrl(data);
+	unsigned int line = irqd_to_hwirq(data);
+	unsigned int port = line / 8;
+	unsigned int port_pin = line % 8;
+	unsigned long flags;
+	u16 type, t;
+
+	switch (flow_type & IRQ_TYPE_SENSE_MASK) {
+	case IRQ_TYPE_EDGE_FALLING:
+		type = REALTEK_GPIO_IRQ_EDGE_FALLING;
+		break;
+	case IRQ_TYPE_EDGE_RISING:
+		type = REALTEK_GPIO_IRQ_EDGE_RISING;
+		break;
+	case IRQ_TYPE_EDGE_BOTH:
+		type = REALTEK_GPIO_IRQ_EDGE_BOTH;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	irq_set_handler_locked(data, handle_edge_irq);
+
+	raw_spin_lock_irqsave(&ctrl->lock, flags);
+	t = ctrl->intr_type[port];
+	t &= ~realtek_gpio_imr_bits(port_pin, REALTEK_GPIO_IMR_LINE_MASK);
+	t |= realtek_gpio_imr_bits(port_pin, type);
+	ctrl->intr_type[port] = t;
+	realtek_gpio_write_imr(ctrl, port, t, ctrl->intr_mask[port]);
+	raw_spin_unlock_irqrestore(&ctrl->lock, flags);
+
+	return 0;
+}
+
+static void realtek_gpio_irq_handler(struct irq_desc *desc)
+{
+	struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+	struct realtek_gpio_ctrl *ctrl = gpiochip_get_data(gc);
+	struct irq_chip *irq_chip = irq_desc_get_chip(desc);
+	unsigned int lines_done;
+	unsigned int port_pin_count;
+	unsigned int irq;
+	unsigned long status;
+	int offset;
+
+	chained_irq_enter(irq_chip, desc);
+
+	for (lines_done = 0; lines_done < gc->ngpio; lines_done += 8) {
+		status = realtek_gpio_read_isr(ctrl, lines_done / 8);
+		port_pin_count = min(gc->ngpio - lines_done, 8U);
+		for_each_set_bit(offset, &status, port_pin_count) {
+			irq = irq_find_mapping(gc->irq.domain, offset);
+			generic_handle_irq(irq);
+		}
+	}
+
+	chained_irq_exit(irq_chip, desc);
+}
+
+static int realtek_gpio_irq_init(struct gpio_chip *gc)
+{
+	struct realtek_gpio_ctrl *ctrl = gpiochip_get_data(gc);
+	unsigned int port;
+
+	for (port = 0; (port * 8) < gc->ngpio; port++) {
+		realtek_gpio_write_imr(ctrl, port, 0, 0);
+		realtek_gpio_clear_isr(ctrl, port, GENMASK(7, 0));
+	}
+
+	return 0;
+}
+
+static struct irq_chip realtek_gpio_irq_chip = {
+	.name = "realtek-otto-gpio",
+	.irq_ack = realtek_gpio_irq_ack,
+	.irq_mask = realtek_gpio_irq_mask,
+	.irq_unmask = realtek_gpio_irq_unmask,
+	.irq_set_type = realtek_gpio_irq_set_type,
+};
+
+static const struct of_device_id realtek_gpio_of_match[] = {
+	{
+		.compatible = "realtek,otto-gpio",
+		.data = (void *)GPIO_INTERRUPTS_DISABLED,
+	},
+	{
+		.compatible = "realtek,rtl8380-gpio",
+	},
+	{
+		.compatible = "realtek,rtl8390-gpio",
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(of, realtek_gpio_of_match);
+
+static int realtek_gpio_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	unsigned int dev_flags;
+	struct gpio_irq_chip *girq;
+	struct realtek_gpio_ctrl *ctrl;
+	u32 ngpios;
+	int err, irq;
+
+	ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
+	if (!ctrl)
+		return -ENOMEM;
+
+	dev_flags = (unsigned int) device_get_match_data(dev);
+
+	ngpios = REALTEK_GPIO_MAX;
+	device_property_read_u32(dev, "ngpios", &ngpios);
+
+	if (ngpios > REALTEK_GPIO_MAX) {
+		dev_err(&pdev->dev, "invalid ngpios (max. %d)\n",
+			REALTEK_GPIO_MAX);
+		return -EINVAL;
+	}
+
+	ctrl->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(ctrl->base))
+		return PTR_ERR(ctrl->base);
+
+	raw_spin_lock_init(&ctrl->lock);
+
+	err = bgpio_init(&ctrl->gc, dev, 4,
+		ctrl->base + REALTEK_GPIO_REG_DATA, NULL, NULL,
+		ctrl->base + REALTEK_GPIO_REG_DIR, NULL,
+		BGPIOF_BIG_ENDIAN_BYTE_ORDER);
+	if (err) {
+		dev_err(dev, "unable to init generic GPIO");
+		return err;
+	}
+
+	ctrl->gc.ngpio = ngpios;
+	ctrl->gc.owner = THIS_MODULE;
+
+	irq = platform_get_irq_optional(pdev, 0);
+	if (!(dev_flags & GPIO_INTERRUPTS_DISABLED) && irq > 0) {
+		girq = &ctrl->gc.irq;
+		girq->chip = &realtek_gpio_irq_chip;
+		girq->default_type = IRQ_TYPE_NONE;
+		girq->handler = handle_bad_irq;
+		girq->parent_handler = realtek_gpio_irq_handler;
+		girq->num_parents = 1;
+		girq->parents = devm_kcalloc(dev, girq->num_parents,
+					sizeof(*girq->parents),	GFP_KERNEL);
+		if (!girq->parents)
+			return -ENOMEM;
+		girq->parents[0] = irq;
+		girq->init_hw = realtek_gpio_irq_init;
+	}
+
+	return devm_gpiochip_add_data(dev, &ctrl->gc, ctrl);
+}
+
+static struct platform_driver realtek_gpio_driver = {
+	.driver = {
+		.name = "realtek-otto-gpio",
+		.of_match_table	= realtek_gpio_of_match,
+	},
+	.probe = realtek_gpio_probe,
+};
+module_platform_driver(realtek_gpio_driver);
+
+MODULE_DESCRIPTION("Realtek Otto GPIO support");
+MODULE_AUTHOR("Sander Vanheule <sander@svanheule.net>");
+MODULE_LICENSE("GPL v2");
-- 
cgit v1.2.3


From ca40daf39daf62355d87287a8732cadb62d13e2e Mon Sep 17 00:00:00 2001
From: Tian Tao <tiantao6@hisilicon.com>
Date: Wed, 31 Mar 2021 16:19:11 +0800
Subject: gpio: omap: Use device_get_match_data() helper

Use the device_get_match_data() helper instead of open coding.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/gpio/gpio-omap.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 41952bb818ad..f4df555fc39c 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -1364,15 +1364,14 @@ static int omap_gpio_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct device_node *node = dev->of_node;
-	const struct of_device_id *match;
 	const struct omap_gpio_platform_data *pdata;
 	struct gpio_bank *bank;
 	struct irq_chip *irqc;
 	int ret;
 
-	match = of_match_device(of_match_ptr(omap_gpio_match), dev);
+	pdata = device_get_match_data(dev);
 
-	pdata = match ? match->data : dev_get_platdata(dev);
+	pdata = pdata ?: dev_get_platdata(dev);
 	if (!pdata)
 		return -EINVAL;
 
-- 
cgit v1.2.3


From ac505b6f5fa8289c3d3a311344de0da23f6ff767 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Mon, 1 Mar 2021 18:59:32 +0200
Subject: gpio: aggregator: Replace custom get_arg() with a generic next_arg()

cmdline library provides next_arg() helper to traverse over parameters
and their values given in command line. Replace custom approach in the driver
by it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 drivers/gpio/gpio-aggregator.c | 39 +++++----------------------------------
 1 file changed, 5 insertions(+), 34 deletions(-)

(limited to 'drivers')

diff --git a/drivers/gpio/gpio-aggregator.c b/drivers/gpio/gpio-aggregator.c
index 08171431bb8f..34e35b64dcdc 100644
--- a/drivers/gpio/gpio-aggregator.c
+++ b/drivers/gpio/gpio-aggregator.c
@@ -37,31 +37,6 @@ struct gpio_aggregator {
 static DEFINE_MUTEX(gpio_aggregator_lock);	/* protects idr */
 static DEFINE_IDR(gpio_aggregator_idr);
 
-static char *get_arg(char **args)
-{
-	char *start, *end;
-
-	start = skip_spaces(*args);
-	if (!*start)
-		return NULL;
-
-	if (*start == '"') {
-		/* Quoted arg */
-		end = strchr(++start, '"');
-		if (!end)
-			return ERR_PTR(-EINVAL);
-	} else {
-		/* Unquoted arg */
-		for (end = start; *end && !isspace(*end); end++) ;
-	}
-
-	if (*end)
-		*end++ = '\0';
-
-	*args = end;
-	return start;
-}
-
 static int aggr_add_gpio(struct gpio_aggregator *aggr, const char *key,
 			 int hwnum, unsigned int *n)
 {
@@ -83,8 +58,8 @@ static int aggr_add_gpio(struct gpio_aggregator *aggr, const char *key,
 
 static int aggr_parse(struct gpio_aggregator *aggr)
 {
+	char *args = skip_spaces(aggr->args);
 	char *name, *offsets, *p;
-	char *args = aggr->args;
 	unsigned long *bitmap;
 	unsigned int i, n = 0;
 	int error = 0;
@@ -93,13 +68,9 @@ static int aggr_parse(struct gpio_aggregator *aggr)
 	if (!bitmap)
 		return -ENOMEM;
 
-	for (name = get_arg(&args), offsets = get_arg(&args); name;
-	     offsets = get_arg(&args)) {
-		if (IS_ERR(name)) {
-			pr_err("Cannot get GPIO specifier: %pe\n", name);
-			error = PTR_ERR(name);
-			goto free_bitmap;
-		}
+	args = next_arg(args, &name, &p);
+	while (*args) {
+		args = next_arg(args, &offsets, &p);
 
 		p = get_options(offsets, 0, &error);
 		if (error == 0 || *p) {
@@ -125,7 +96,7 @@ static int aggr_parse(struct gpio_aggregator *aggr)
 				goto free_bitmap;
 		}
 
-		name = get_arg(&args);
+		args = next_arg(args, &name, &p);
 	}
 
 	if (!n) {
-- 
cgit v1.2.3


From 7a81638485c1a62a87b4c391ecc9c651a4a9dc19 Mon Sep 17 00:00:00 2001
From: Jan Kiszka <jan.kiszka@siemens.com>
Date: Wed, 17 Mar 2021 17:19:27 +0200
Subject: gpio: sch: Add edge event support

Add the required infrastructure to enable and report edge events
of the pins to the GPIO core. The actual hook-up of the event interrupt
will happen separately.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Co-developed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/gpio/Kconfig    |   1 +
 drivers/gpio/gpio-sch.c | 116 ++++++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 109 insertions(+), 8 deletions(-)

(limited to 'drivers')

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 6fb13d6507db..ad1a325be727 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -861,6 +861,7 @@ config GPIO_IT87
 config GPIO_SCH
 	tristate "Intel SCH/TunnelCreek/Centerton/Quark X1000 GPIO"
 	depends on (X86 || COMPILE_TEST) && PCI
+	select GPIOLIB_IRQCHIP
 	select MFD_CORE
 	select LPC_SCH
 	help
diff --git a/drivers/gpio/gpio-sch.c b/drivers/gpio/gpio-sch.c
index 3a1b1adb08c6..06ab55d134b9 100644
--- a/drivers/gpio/gpio-sch.c
+++ b/drivers/gpio/gpio-sch.c
@@ -10,17 +10,28 @@
 #include <linux/errno.h>
 #include <linux/gpio/driver.h>
 #include <linux/io.h>
+#include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/pci_ids.h>
 #include <linux/platform_device.h>
+#include <linux/types.h>
 
 #define GEN	0x00
 #define GIO	0x04
 #define GLV	0x08
+#define GTPE	0x0c
+#define GTNE	0x10
+#define GGPE	0x14
+#define GSMI	0x18
+#define GTS	0x1c
+
+#define CORE_BANK_OFFSET	0x00
+#define RESUME_BANK_OFFSET	0x20
 
 struct sch_gpio {
 	struct gpio_chip chip;
+	struct irq_chip irqchip;
 	spinlock_t lock;
 	unsigned short iobase;
 	unsigned short resume_base;
@@ -29,11 +40,11 @@ struct sch_gpio {
 static unsigned int sch_gpio_offset(struct sch_gpio *sch, unsigned int gpio,
 				unsigned int reg)
 {
-	unsigned int base = 0;
+	unsigned int base = CORE_BANK_OFFSET;
 
 	if (gpio >= sch->resume_base) {
 		gpio -= sch->resume_base;
-		base += 0x20;
+		base = RESUME_BANK_OFFSET;
 	}
 
 	return base + reg + gpio / 8;
@@ -79,10 +90,11 @@ static void sch_gpio_reg_set(struct sch_gpio *sch, unsigned int gpio, unsigned i
 static int sch_gpio_direction_in(struct gpio_chip *gc, unsigned int gpio_num)
 {
 	struct sch_gpio *sch = gpiochip_get_data(gc);
+	unsigned long flags;
 
-	spin_lock(&sch->lock);
+	spin_lock_irqsave(&sch->lock, flags);
 	sch_gpio_reg_set(sch, gpio_num, GIO, 1);
-	spin_unlock(&sch->lock);
+	spin_unlock_irqrestore(&sch->lock, flags);
 	return 0;
 }
 
@@ -96,20 +108,22 @@ static int sch_gpio_get(struct gpio_chip *gc, unsigned int gpio_num)
 static void sch_gpio_set(struct gpio_chip *gc, unsigned int gpio_num, int val)
 {
 	struct sch_gpio *sch = gpiochip_get_data(gc);
+	unsigned long flags;
 
-	spin_lock(&sch->lock);
+	spin_lock_irqsave(&sch->lock, flags);
 	sch_gpio_reg_set(sch, gpio_num, GLV, val);
-	spin_unlock(&sch->lock);
+	spin_unlock_irqrestore(&sch->lock, flags);
 }
 
 static int sch_gpio_direction_out(struct gpio_chip *gc, unsigned int gpio_num,
 				  int val)
 {
 	struct sch_gpio *sch = gpiochip_get_data(gc);
+	unsigned long flags;
 
-	spin_lock(&sch->lock);
+	spin_lock_irqsave(&sch->lock, flags);
 	sch_gpio_reg_set(sch, gpio_num, GIO, 0);
-	spin_unlock(&sch->lock);
+	spin_unlock_irqrestore(&sch->lock, flags);
 
 	/*
 	 * according to the datasheet, writing to the level register has no
@@ -144,8 +158,80 @@ static const struct gpio_chip sch_gpio_chip = {
 	.get_direction		= sch_gpio_get_direction,
 };
 
+static int sch_irq_type(struct irq_data *d, unsigned int type)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct sch_gpio *sch = gpiochip_get_data(gc);
+	irq_hw_number_t gpio_num = irqd_to_hwirq(d);
+	unsigned long flags;
+	int rising, falling;
+
+	switch (type & IRQ_TYPE_SENSE_MASK) {
+	case IRQ_TYPE_EDGE_RISING:
+		rising = 1;
+		falling = 0;
+		break;
+	case IRQ_TYPE_EDGE_FALLING:
+		rising = 0;
+		falling = 1;
+		break;
+	case IRQ_TYPE_EDGE_BOTH:
+		rising = 1;
+		falling = 1;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&sch->lock, flags);
+
+	sch_gpio_reg_set(sch, gpio_num, GTPE, rising);
+	sch_gpio_reg_set(sch, gpio_num, GTNE, falling);
+
+	irq_set_handler_locked(d, handle_edge_irq);
+
+	spin_unlock_irqrestore(&sch->lock, flags);
+
+	return 0;
+}
+
+static void sch_irq_ack(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct sch_gpio *sch = gpiochip_get_data(gc);
+	irq_hw_number_t gpio_num = irqd_to_hwirq(d);
+	unsigned long flags;
+
+	spin_lock_irqsave(&sch->lock, flags);
+	sch_gpio_reg_set(sch, gpio_num, GTS, 1);
+	spin_unlock_irqrestore(&sch->lock, flags);
+}
+
+static void sch_irq_mask_unmask(struct irq_data *d, int val)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct sch_gpio *sch = gpiochip_get_data(gc);
+	irq_hw_number_t gpio_num = irqd_to_hwirq(d);
+	unsigned long flags;
+
+	spin_lock_irqsave(&sch->lock, flags);
+	sch_gpio_reg_set(sch, gpio_num, GGPE, val);
+	spin_unlock_irqrestore(&sch->lock, flags);
+}
+
+static void sch_irq_mask(struct irq_data *d)
+{
+	sch_irq_mask_unmask(d, 0);
+}
+
+static void sch_irq_unmask(struct irq_data *d)
+{
+	sch_irq_mask_unmask(d, 1);
+}
+
 static int sch_gpio_probe(struct platform_device *pdev)
 {
+	struct gpio_irq_chip *girq;
 	struct sch_gpio *sch;
 	struct resource *res;
 
@@ -207,6 +293,20 @@ static int sch_gpio_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, sch);
 
+	sch->irqchip.name = "sch_gpio";
+	sch->irqchip.irq_ack = sch_irq_ack;
+	sch->irqchip.irq_mask = sch_irq_mask;
+	sch->irqchip.irq_unmask = sch_irq_unmask;
+	sch->irqchip.irq_set_type = sch_irq_type;
+
+	girq = &sch->chip.irq;
+	girq->chip = &sch->irqchip;
+	girq->num_parents = 0;
+	girq->parents = NULL;
+	girq->parent_handler = NULL;
+	girq->default_type = IRQ_TYPE_NONE;
+	girq->handler = handle_bad_irq;
+
 	return devm_gpiochip_add_data(&pdev->dev, &sch->chip, sch);
 }
 
-- 
cgit v1.2.3


From fdc1f5dfb9aa890473d6f94bd224d45cf2f0443d Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Wed, 17 Mar 2021 17:19:28 +0200
Subject: gpio: sch: Hook into ACPI GPE handler to catch GPIO edge events

Neither the ACPI description on Intel Minnowboard (v1) platform provides
the required information to establish a generic handling nor the hardware
capable of doing it. According to the data sheet the hardware can generate
SCI events. Therefore, we need to hook from the driver into GPE handler of
the ACPI subsystem in order to catch and report GPIO-related events.

Validated on the Inlel Minnowboard (v1) platform and Intel Galileo Gen 2.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/gpio/Kconfig    |  2 +-
 drivers/gpio/gpio-sch.c | 82 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 83 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index ad1a325be727..3a56a6370b6c 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -860,7 +860,7 @@ config GPIO_IT87
 
 config GPIO_SCH
 	tristate "Intel SCH/TunnelCreek/Centerton/Quark X1000 GPIO"
-	depends on (X86 || COMPILE_TEST) && PCI
+	depends on (X86 || COMPILE_TEST) && ACPI
 	select GPIOLIB_IRQCHIP
 	select MFD_CORE
 	select LPC_SCH
diff --git a/drivers/gpio/gpio-sch.c b/drivers/gpio/gpio-sch.c
index 06ab55d134b9..a6f0421d6e50 100644
--- a/drivers/gpio/gpio-sch.c
+++ b/drivers/gpio/gpio-sch.c
@@ -7,6 +7,7 @@
  */
 
 #include <linux/acpi.h>
+#include <linux/bitops.h>
 #include <linux/errno.h>
 #include <linux/gpio/driver.h>
 #include <linux/io.h>
@@ -29,12 +30,22 @@
 #define CORE_BANK_OFFSET	0x00
 #define RESUME_BANK_OFFSET	0x20
 
+/*
+ * iLB datasheet describes GPE0BLK registers, in particular GPE0E.GPIO bit.
+ * Document Number: 328195-001
+ */
+#define GPE0E_GPIO	14
+
 struct sch_gpio {
 	struct gpio_chip chip;
 	struct irq_chip irqchip;
 	spinlock_t lock;
 	unsigned short iobase;
 	unsigned short resume_base;
+
+	/* GPE handling */
+	u32 gpe;
+	acpi_gpe_handler gpe_handler;
 };
 
 static unsigned int sch_gpio_offset(struct sch_gpio *sch, unsigned int gpio,
@@ -229,11 +240,74 @@ static void sch_irq_unmask(struct irq_data *d)
 	sch_irq_mask_unmask(d, 1);
 }
 
+static u32 sch_gpio_gpe_handler(acpi_handle gpe_device, u32 gpe, void *context)
+{
+	struct sch_gpio *sch = context;
+	struct gpio_chip *gc = &sch->chip;
+	unsigned long core_status, resume_status;
+	unsigned long pending;
+	unsigned long flags;
+	int offset;
+	u32 ret;
+
+	spin_lock_irqsave(&sch->lock, flags);
+
+	core_status = inl(sch->iobase + CORE_BANK_OFFSET + GTS);
+	resume_status = inl(sch->iobase + RESUME_BANK_OFFSET + GTS);
+
+	spin_unlock_irqrestore(&sch->lock, flags);
+
+	pending = (resume_status << sch->resume_base) | core_status;
+	for_each_set_bit(offset, &pending, sch->chip.ngpio)
+		generic_handle_irq(irq_find_mapping(gc->irq.domain, offset));
+
+	/* Set returning value depending on whether we handled an interrupt */
+	ret = pending ? ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED;
+
+	/* Acknowledge GPE to ACPICA */
+	ret |= ACPI_REENABLE_GPE;
+
+	return ret;
+}
+
+static void sch_gpio_remove_gpe_handler(void *data)
+{
+	struct sch_gpio *sch = data;
+
+	acpi_disable_gpe(NULL, sch->gpe);
+	acpi_remove_gpe_handler(NULL, sch->gpe, sch->gpe_handler);
+}
+
+static int sch_gpio_install_gpe_handler(struct sch_gpio *sch)
+{
+	struct device *dev = sch->chip.parent;
+	acpi_status status;
+
+	status = acpi_install_gpe_handler(NULL, sch->gpe, ACPI_GPE_LEVEL_TRIGGERED,
+					  sch->gpe_handler, sch);
+	if (ACPI_FAILURE(status)) {
+		dev_err(dev, "Failed to install GPE handler for %u: %s\n",
+			sch->gpe, acpi_format_exception(status));
+		return -ENODEV;
+	}
+
+	status = acpi_enable_gpe(NULL, sch->gpe);
+	if (ACPI_FAILURE(status)) {
+		dev_err(dev, "Failed to enable GPE handler for %u: %s\n",
+			sch->gpe, acpi_format_exception(status));
+		acpi_remove_gpe_handler(NULL, sch->gpe, sch->gpe_handler);
+		return -ENODEV;
+	}
+
+	return devm_add_action_or_reset(dev, sch_gpio_remove_gpe_handler, sch);
+}
+
 static int sch_gpio_probe(struct platform_device *pdev)
 {
 	struct gpio_irq_chip *girq;
 	struct sch_gpio *sch;
 	struct resource *res;
+	int ret;
 
 	sch = devm_kzalloc(&pdev->dev, sizeof(*sch), GFP_KERNEL);
 	if (!sch)
@@ -307,6 +381,14 @@ static int sch_gpio_probe(struct platform_device *pdev)
 	girq->default_type = IRQ_TYPE_NONE;
 	girq->handler = handle_bad_irq;
 
+	/* GPE setup is optional */
+	sch->gpe = GPE0E_GPIO;
+	sch->gpe_handler = sch_gpio_gpe_handler;
+
+	ret = sch_gpio_install_gpe_handler(sch);
+	if (ret)
+		dev_warn(&pdev->dev, "Can't setup GPE, no IRQ support\n");
+
 	return devm_gpiochip_add_data(&pdev->dev, &sch->chip, sch);
 }
 
-- 
cgit v1.2.3


From da91ece226729c76f60708efc275ebd4716ad089 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Thu, 1 Apr 2021 18:27:40 +0200
Subject: gpiolib: acpi: Add quirk to ignore EC wakeups on Dell Venue 10 Pro
 5055

Like some other Bay and Cherry Trail SoC based devices the Dell Venue
10 Pro 5055 has an embedded-controller which uses ACPI GPIO events to
report events instead of using the standard ACPI EC interface for this.

The EC interrupt is only used to report battery-level changes and
it keeps doing this while the system is suspended, causing the system
to not stay suspended.

Add an ignore-wake quirk for the GPIO pin used by the EC to fix the
spurious wakeups from suspend.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpio/gpiolib-acpi.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'drivers')

diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 21750be9c489..3ef22a3c104d 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -1445,6 +1445,20 @@ static const struct dmi_system_id gpiolib_acpi_quirks[] __initconst = {
 			.no_edge_events_on_boot = true,
 		},
 	},
+	{
+		/*
+		 * The Dell Venue 10 Pro 5055, with Bay Trail SoC + TI PMIC uses an
+		 * external embedded-controller connected via I2C + an ACPI GPIO
+		 * event handler on INT33FFC:02 pin 12, causing spurious wakeups.
+		 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Venue 10 Pro 5055"),
+		},
+		.driver_data = &(struct acpi_gpiolib_dmi_quirk) {
+			.ignore_wake = "INT33FC:02@12",
+		},
+	},
 	{
 		/*
 		 * HP X2 10 models with Cherry Trail SoC + TI PMIC use an
-- 
cgit v1.2.3


From 71cf76d451ef40ff700320069fe58ae239f6f5aa Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Fri, 2 Apr 2021 09:17:51 -0700
Subject: gpio: sch: depends on LPC_SCH
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Since LPC_SCH provides GPIO functionality, GPIO_SCH should depend on
LPC_SCH to prevent kconfig warning and build errors:

WARNING: unmet direct dependencies detected for LPC_SCH
  Depends on [n]: HAS_IOMEM [=y] && PCI [=n]
  Selected by [y]:
  - GPIO_SCH [=y] && GPIOLIB [=y] && X86 [=y] && (X86 [=y] || COMPILE_TEST [=n]) && ACPI [=y]

and

../drivers/mfd/lpc_sch.c:204:1: warning: data definition has no type or storage class
 module_pci_driver(lpc_sch_driver);
 ^~~~~~~~~~~~~~~~~
../drivers/mfd/lpc_sch.c:204:1: error: type defaults to ‘int’ in declaration of ‘module_pci_driver’ [-Werror=implicit-int]
../drivers/mfd/lpc_sch.c:204:1: warning: parameter names (without types) in function declaration
../drivers/mfd/lpc_sch.c:197:26: warning: ‘lpc_sch_driver’ defined but not used [-Wunused-variable]
 static struct pci_driver lpc_sch_driver = {
                          ^~~~~~~~~~~~~~

Fixes: 6c46215d6b62 ("gpio: sch: Hook into ACPI GPE handler to catch GPIO edge events")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-gpio@vger.kernel.org
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Cc: Denis Turischev <denis@compulab.co.il>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpio/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 3a56a6370b6c..b9df2f0c05ba 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -861,9 +861,9 @@ config GPIO_IT87
 config GPIO_SCH
 	tristate "Intel SCH/TunnelCreek/Centerton/Quark X1000 GPIO"
 	depends on (X86 || COMPILE_TEST) && ACPI
+	depends on LPC_SCH
 	select GPIOLIB_IRQCHIP
 	select MFD_CORE
-	select LPC_SCH
 	help
 	  Say yes here to support GPIO interface on Intel Poulsbo SCH,
 	  Intel Tunnel Creek processor, Intel Centerton processor or
-- 
cgit v1.2.3


From c6b4853fa25a7f0549731c141e6b2b3f29a6b473 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 2 Apr 2021 21:21:03 +0300
Subject: gpio: sch: Drop MFD_CORE selection

Since we are depended on LPC_SCH, which selects MFD_CORE,
we don't need to do it ourselves.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpio/Kconfig | 1 -
 1 file changed, 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index b9df2f0c05ba..39a4b8207b48 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -863,7 +863,6 @@ config GPIO_SCH
 	depends on (X86 || COMPILE_TEST) && ACPI
 	depends on LPC_SCH
 	select GPIOLIB_IRQCHIP
-	select MFD_CORE
 	help
 	  Say yes here to support GPIO interface on Intel Poulsbo SCH,
 	  Intel Tunnel Creek processor, Intel Centerton processor or
-- 
cgit v1.2.3


From ba134d29e9526aa8396da355e69f55e8f9badd6d Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 2 Apr 2021 21:42:25 +0300
Subject: gpio: ich: Switch to be dependent on LPC_ICH

Driver is neither dependent to PCI nor using MFD_CORE.
Replace those dependency and selection by dependency on LPC_ICH.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpio/Kconfig    | 5 ++---
 drivers/gpio/gpio-ich.c | 2 --
 2 files changed, 2 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 39a4b8207b48..3456b418127a 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -321,9 +321,8 @@ config GPIO_HLWD
 
 config GPIO_ICH
 	tristate "Intel ICH GPIO"
-	depends on PCI && X86
-	select MFD_CORE
-	select LPC_ICH
+	depends on X86
+	depends on LPC_ICH
 	help
 	  Say yes here to support the GPIO functionality of a number of Intel
 	  ICH-based chipsets.  Currently supported devices: ICH6, ICH7, ICH8
diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c
index de56c013a658..3b31f5e9bf40 100644
--- a/drivers/gpio/gpio-ich.c
+++ b/drivers/gpio/gpio-ich.c
@@ -5,13 +5,11 @@
  * Copyright (C) 2010 Extreme Engineering Solutions.
  */
 
-
 #include <linux/bitops.h>
 #include <linux/gpio/driver.h>
 #include <linux/ioport.h>
 #include <linux/mfd/lpc_ich.h>
 #include <linux/module.h>
-#include <linux/pci.h>
 #include <linux/platform_device.h>
 
 #define DRV_NAME "gpio_ich"
-- 
cgit v1.2.3


From 76c47d1449fc2ad58fec3a4ace45e33c3952720e Mon Sep 17 00:00:00 2001
From: Ran Wang <ran.wang_1@nxp.com>
Date: Mon, 22 Mar 2021 11:38:46 +0800
Subject: gpio: mpc8xxx: Add ACPI support

Current implementation only supports DT, now add ACPI support.

Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/gpio/gpio-mpc8xxx.c | 47 +++++++++++++++++++++++++++++++--------------
 1 file changed, 33 insertions(+), 14 deletions(-)

(limited to 'drivers')

diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index 6dfca83bcd90..4b9157a69fca 100644
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -9,6 +9,7 @@
  * kind, whether express or implied.
  */
 
+#include <linux/acpi.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/spinlock.h>
@@ -18,6 +19,8 @@
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
+#include <linux/property.h>
+#include <linux/mod_devicetable.h>
 #include <linux/slab.h>
 #include <linux/irq.h>
 #include <linux/gpio/driver.h>
@@ -303,8 +306,8 @@ static int mpc8xxx_probe(struct platform_device *pdev)
 	struct device_node *np = pdev->dev.of_node;
 	struct mpc8xxx_gpio_chip *mpc8xxx_gc;
 	struct gpio_chip	*gc;
-	const struct mpc8xxx_gpio_devtype *devtype =
-		of_device_get_match_data(&pdev->dev);
+	const struct mpc8xxx_gpio_devtype *devtype = NULL;
+	struct fwnode_handle *fwnode;
 	int ret;
 
 	mpc8xxx_gc = devm_kzalloc(&pdev->dev, sizeof(*mpc8xxx_gc), GFP_KERNEL);
@@ -315,14 +318,14 @@ static int mpc8xxx_probe(struct platform_device *pdev)
 
 	raw_spin_lock_init(&mpc8xxx_gc->lock);
 
-	mpc8xxx_gc->regs = of_iomap(np, 0);
-	if (!mpc8xxx_gc->regs)
-		return -ENOMEM;
+	mpc8xxx_gc->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(mpc8xxx_gc->regs))
+		return PTR_ERR(mpc8xxx_gc->regs);
 
 	gc = &mpc8xxx_gc->gc;
 	gc->parent = &pdev->dev;
 
-	if (of_property_read_bool(np, "little-endian")) {
+	if (device_property_read_bool(&pdev->dev, "little-endian")) {
 		ret = bgpio_init(gc, &pdev->dev, 4,
 				 mpc8xxx_gc->regs + GPIO_DAT,
 				 NULL, NULL,
@@ -345,6 +348,7 @@ static int mpc8xxx_probe(struct platform_device *pdev)
 
 	mpc8xxx_gc->direction_output = gc->direction_output;
 
+	devtype = device_get_match_data(&pdev->dev);
 	if (!devtype)
 		devtype = &mpc8xxx_gpio_devtype_default;
 
@@ -369,24 +373,29 @@ static int mpc8xxx_probe(struct platform_device *pdev)
 	 * associated input enable must be set (GPIOxGPIE[IEn]=1) to propagate
 	 * the port value to the GPIO Data Register.
 	 */
+	fwnode = dev_fwnode(&pdev->dev);
 	if (of_device_is_compatible(np, "fsl,qoriq-gpio") ||
 	    of_device_is_compatible(np, "fsl,ls1028a-gpio") ||
-	    of_device_is_compatible(np, "fsl,ls1088a-gpio"))
+	    of_device_is_compatible(np, "fsl,ls1088a-gpio") ||
+	    is_acpi_node(fwnode))
 		gc->write_reg(mpc8xxx_gc->regs + GPIO_IBE, 0xffffffff);
 
 	ret = gpiochip_add_data(gc, mpc8xxx_gc);
 	if (ret) {
-		pr_err("%pOF: GPIO chip registration failed with status %d\n",
-		       np, ret);
+		dev_err(&pdev->dev,
+			"GPIO chip registration failed with status %d\n", ret);
 		goto err;
 	}
 
-	mpc8xxx_gc->irqn = irq_of_parse_and_map(np, 0);
+	mpc8xxx_gc->irqn = platform_get_irq(pdev, 0);
 	if (!mpc8xxx_gc->irqn)
 		return 0;
 
-	mpc8xxx_gc->irq = irq_domain_add_linear(np, MPC8XXX_GPIO_PINS,
-					&mpc8xxx_gpio_irq_ops, mpc8xxx_gc);
+	mpc8xxx_gc->irq = irq_domain_create_linear(fwnode,
+						   MPC8XXX_GPIO_PINS,
+						   &mpc8xxx_gpio_irq_ops,
+						   mpc8xxx_gc);
+
 	if (!mpc8xxx_gc->irq)
 		return 0;
 
@@ -399,8 +408,9 @@ static int mpc8xxx_probe(struct platform_device *pdev)
 			       IRQF_SHARED, "gpio-cascade",
 			       mpc8xxx_gc);
 	if (ret) {
-		dev_err(&pdev->dev, "%s: failed to devm_request_irq(%d), ret = %d\n",
-			np->full_name, mpc8xxx_gc->irqn, ret);
+		dev_err(&pdev->dev,
+			"failed to devm_request_irq(%d), ret = %d\n",
+			mpc8xxx_gc->irqn, ret);
 		goto err;
 	}
 
@@ -425,12 +435,21 @@ static int mpc8xxx_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id gpio_acpi_ids[] = {
+	{"NXP0031",},
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, gpio_acpi_ids);
+#endif
+
 static struct platform_driver mpc8xxx_plat_driver = {
 	.probe		= mpc8xxx_probe,
 	.remove		= mpc8xxx_remove,
 	.driver		= {
 		.name = "gpio-mpc8xxx",
 		.of_match_table	= mpc8xxx_gpio_ids,
+		.acpi_match_table = ACPI_PTR(gpio_acpi_ids),
 	},
 };
 
-- 
cgit v1.2.3


From abd7a8eab8139e1e184712965e69165464a660e2 Mon Sep 17 00:00:00 2001
From: Barney Goette <barneygoette@gmail.com>
Date: Thu, 8 Apr 2021 10:53:34 -0500
Subject: gpio: 104-dio-48e: Fix coding style issues

Fixed multiple bare uses of 'unsigned' without 'int'.
Fixed space around "*" operator.
Fixed function parameter alignment to opening parenthesis.
Reported by checkpatch.

Signed-off-by: Barney Goette <barneygoette@gmail.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/gpio/gpio-104-dio-48e.c | 50 ++++++++++++++++++++---------------------
 1 file changed, 25 insertions(+), 25 deletions(-)

(limited to 'drivers')

diff --git a/drivers/gpio/gpio-104-dio-48e.c b/drivers/gpio/gpio-104-dio-48e.c
index 7a9021c4fa48..71c0bea34d7b 100644
--- a/drivers/gpio/gpio-104-dio-48e.c
+++ b/drivers/gpio/gpio-104-dio-48e.c
@@ -49,15 +49,15 @@ struct dio48e_gpio {
 	unsigned char out_state[6];
 	unsigned char control[2];
 	raw_spinlock_t lock;
-	unsigned base;
+	unsigned int base;
 	unsigned char irq_mask;
 };
 
-static int dio48e_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
+static int dio48e_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
 {
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip);
-	const unsigned port = offset / 8;
-	const unsigned mask = BIT(offset % 8);
+	const unsigned int port = offset / 8;
+	const unsigned int mask = BIT(offset % 8);
 
 	if (dio48egpio->io_state[port] & mask)
 		return  GPIO_LINE_DIRECTION_IN;
@@ -65,14 +65,14 @@ static int dio48e_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
 	return GPIO_LINE_DIRECTION_OUT;
 }
 
-static int dio48e_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+static int dio48e_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
 {
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip);
-	const unsigned io_port = offset / 8;
+	const unsigned int io_port = offset / 8;
 	const unsigned int control_port = io_port / 3;
-	const unsigned control_addr = dio48egpio->base + 3 + control_port*4;
+	const unsigned int control_addr = dio48egpio->base + 3 + control_port * 4;
 	unsigned long flags;
-	unsigned control;
+	unsigned int control;
 
 	raw_spin_lock_irqsave(&dio48egpio->lock, flags);
 
@@ -104,17 +104,17 @@ static int dio48e_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 	return 0;
 }
 
-static int dio48e_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
-	int value)
+static int dio48e_gpio_direction_output(struct gpio_chip *chip, unsigned int offset,
+					int value)
 {
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip);
-	const unsigned io_port = offset / 8;
+	const unsigned int io_port = offset / 8;
 	const unsigned int control_port = io_port / 3;
-	const unsigned mask = BIT(offset % 8);
-	const unsigned control_addr = dio48egpio->base + 3 + control_port*4;
-	const unsigned out_port = (io_port > 2) ? io_port + 1 : io_port;
+	const unsigned int mask = BIT(offset % 8);
+	const unsigned int control_addr = dio48egpio->base + 3 + control_port * 4;
+	const unsigned int out_port = (io_port > 2) ? io_port + 1 : io_port;
 	unsigned long flags;
-	unsigned control;
+	unsigned int control;
 
 	raw_spin_lock_irqsave(&dio48egpio->lock, flags);
 
@@ -154,14 +154,14 @@ static int dio48e_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
 	return 0;
 }
 
-static int dio48e_gpio_get(struct gpio_chip *chip, unsigned offset)
+static int dio48e_gpio_get(struct gpio_chip *chip, unsigned int offset)
 {
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip);
-	const unsigned port = offset / 8;
-	const unsigned mask = BIT(offset % 8);
-	const unsigned in_port = (port > 2) ? port + 1 : port;
+	const unsigned int port = offset / 8;
+	const unsigned int mask = BIT(offset % 8);
+	const unsigned int in_port = (port > 2) ? port + 1 : port;
 	unsigned long flags;
-	unsigned port_state;
+	unsigned int port_state;
 
 	raw_spin_lock_irqsave(&dio48egpio->lock, flags);
 
@@ -202,12 +202,12 @@ static int dio48e_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
 	return 0;
 }
 
-static void dio48e_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+static void dio48e_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
 {
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip);
-	const unsigned port = offset / 8;
-	const unsigned mask = BIT(offset % 8);
-	const unsigned out_port = (port > 2) ? port + 1 : port;
+	const unsigned int port = offset / 8;
+	const unsigned int mask = BIT(offset % 8);
+	const unsigned int out_port = (port > 2) ? port + 1 : port;
 	unsigned long flags;
 
 	raw_spin_lock_irqsave(&dio48egpio->lock, flags);
@@ -306,7 +306,7 @@ static void dio48e_irq_unmask(struct irq_data *data)
 	raw_spin_unlock_irqrestore(&dio48egpio->lock, flags);
 }
 
-static int dio48e_irq_set_type(struct irq_data *data, unsigned flow_type)
+static int dio48e_irq_set_type(struct irq_data *data, unsigned int flow_type)
 {
 	const unsigned long offset = irqd_to_hwirq(data);
 
-- 
cgit v1.2.3


From 5fe706730800555ece3308965e231308ca0cf877 Mon Sep 17 00:00:00 2001
From: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Date: Tue, 6 Apr 2021 15:20:39 +0800
Subject: gpio: it87: remove unused code

Fix the following clang warning:

drivers/gpio/gpio-it87.c:128:20: warning: unused function 'superio_outw'
[-Wunused-function].

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Acked-by: Simon Guinot <simon.guinot@sequanux.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/gpio/gpio-it87.c | 8 --------
 1 file changed, 8 deletions(-)

(limited to 'drivers')

diff --git a/drivers/gpio/gpio-it87.c b/drivers/gpio/gpio-it87.c
index 8f1be34953ce..f332341fd4c8 100644
--- a/drivers/gpio/gpio-it87.c
+++ b/drivers/gpio/gpio-it87.c
@@ -125,14 +125,6 @@ static inline int superio_inw(int reg)
 	return val;
 }
 
-static inline void superio_outw(int val, int reg)
-{
-	outb(reg++, REG);
-	outb(val >> 8, VAL);
-	outb(reg, REG);
-	outb(val, VAL);
-}
-
 static inline void superio_set_mask(int mask, int reg)
 {
 	u8 curr_val = superio_inb(reg);
-- 
cgit v1.2.3


From e29eaf1c1a68499188c71b1d75f9637ddd29e039 Mon Sep 17 00:00:00 2001
From: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Date: Mon, 12 Apr 2021 10:16:21 +0800
Subject: gpio: mxs: remove useless function

Fix the following gcc warning:

drivers/gpio/gpio-mxs.c:63:19: warning: kernel/sys_ni.cunused function
'is_imx28_gpio'.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/gpio/gpio-mxs.c | 5 -----
 1 file changed, 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/gpio/gpio-mxs.c b/drivers/gpio/gpio-mxs.c
index dfc0c1eb1b33..524b668eb1ac 100644
--- a/drivers/gpio/gpio-mxs.c
+++ b/drivers/gpio/gpio-mxs.c
@@ -60,11 +60,6 @@ static inline int is_imx23_gpio(struct mxs_gpio_port *port)
 	return port->devid == IMX23_GPIO;
 }
 
-static inline int is_imx28_gpio(struct mxs_gpio_port *port)
-{
-	return port->devid == IMX28_GPIO;
-}
-
 /* Note: This driver assumes 32 GPIOs are handled in one register */
 
 static int mxs_gpio_set_irq_type(struct irq_data *d, unsigned int type)
-- 
cgit v1.2.3


From 8736cc2d002f14e90d2b33bc5bef1740f6275ba4 Mon Sep 17 00:00:00 2001
From: Oscar Salvador <osalvador@suse.de>
Date: Tue, 4 May 2021 18:39:33 -0700
Subject: drivers/base/memory: introduce memory_block_{online,offline}

Patch series "Allocate memmap from hotadded memory (per device)", v10.

The primary goal of this patchset is to reduce memory overhead of the
hot-added memory (at least for SPARSEMEM_VMEMMAP memory model).  The
current way we use to populate memmap (struct page array) has two main
drawbacks:

a) it consumes an additional memory until the hotadded memory itself is
   onlined and

b) memmap might end up on a different numa node which is especially
   true for movable_node configuration.

c) due to fragmentation we might end up populating memmap with base
   pages

One way to mitigate all these issues is to simply allocate memmap array
(which is the largest memory footprint of the physical memory hotplug)
from the hot-added memory itself.  SPARSEMEM_VMEMMAP memory model allows
us to map any pfn range so the memory doesn't need to be online to be
usable for the array.  See patch 4 for more details.  This feature is
only usable when CONFIG_SPARSEMEM_VMEMMAP is set.

[Overall design]:

Implementation wise we reuse vmem_altmap infrastructure to override the
default allocator used by vmemap_populate.  memory_block structure gains a
new field called nr_vmemmap_pages, which accounts for the number of
vmemmap pages used by that memory_block.  E.g: On x86_64, that is 512
vmemmap pages on small memory bloks and 4096 on large memory blocks (1GB)

We also introduce new two functions: memory_block_{online,offline}.  These
functions take care of initializing/unitializing vmemmap pages prior to
calling {online,offline}_pages, so the latter functions can remain totally
untouched.

More details can be found in the respective changelogs.

This patch (of 8):

This is a preparatory patch that introduces two new functions:
memory_block_online() and memory_block_offline().

For now, these functions will only call online_pages() and offline_pages()
respectively, but they will be later in charge of preparing the vmemmap
pages, carrying out the initialization and proper accounting of such
pages.

Since memory_block struct contains all the information, pass this struct
down the chain till the end functions.

Link: https://lkml.kernel.org/r/20210421102701.25051-1-osalvador@suse.de
Link: https://lkml.kernel.org/r/20210421102701.25051-2-osalvador@suse.de
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/base/memory.c | 33 +++++++++++++++++++++------------
 1 file changed, 21 insertions(+), 12 deletions(-)

(limited to 'drivers')

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index f35298425575..f209925a5d4e 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -169,30 +169,41 @@ int memory_notify(unsigned long val, void *v)
 	return blocking_notifier_call_chain(&memory_chain, val, v);
 }
 
+static int memory_block_online(struct memory_block *mem)
+{
+	unsigned long start_pfn = section_nr_to_pfn(mem->start_section_nr);
+	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
+
+	return online_pages(start_pfn, nr_pages, mem->online_type, mem->nid);
+}
+
+static int memory_block_offline(struct memory_block *mem)
+{
+	unsigned long start_pfn = section_nr_to_pfn(mem->start_section_nr);
+	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
+
+	return offline_pages(start_pfn, nr_pages);
+}
+
 /*
  * MEMORY_HOTPLUG depends on SPARSEMEM in mm/Kconfig, so it is
  * OK to have direct references to sparsemem variables in here.
  */
 static int
-memory_block_action(unsigned long start_section_nr, unsigned long action,
-		    int online_type, int nid)
+memory_block_action(struct memory_block *mem, unsigned long action)
 {
-	unsigned long start_pfn;
-	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
 	int ret;
 
-	start_pfn = section_nr_to_pfn(start_section_nr);
-
 	switch (action) {
 	case MEM_ONLINE:
-		ret = online_pages(start_pfn, nr_pages, online_type, nid);
+		ret = memory_block_online(mem);
 		break;
 	case MEM_OFFLINE:
-		ret = offline_pages(start_pfn, nr_pages);
+		ret = memory_block_offline(mem);
 		break;
 	default:
 		WARN(1, KERN_WARNING "%s(%ld, %ld) unknown action: "
-		     "%ld\n", __func__, start_section_nr, action, action);
+		     "%ld\n", __func__, mem->start_section_nr, action, action);
 		ret = -EINVAL;
 	}
 
@@ -210,9 +221,7 @@ static int memory_block_change_state(struct memory_block *mem,
 	if (to_state == MEM_OFFLINE)
 		mem->state = MEM_GOING_OFFLINE;
 
-	ret = memory_block_action(mem->start_section_nr, to_state,
-				  mem->online_type, mem->nid);
-
+	ret = memory_block_action(mem, to_state);
 	mem->state = ret ? from_state_req : to_state;
 
 	return ret;
-- 
cgit v1.2.3


From a08a2ae3461383c2d50d0997dcc6cd1dd1fefb08 Mon Sep 17 00:00:00 2001
From: Oscar Salvador <osalvador@suse.de>
Date: Tue, 4 May 2021 18:39:42 -0700
Subject: mm,memory_hotplug: allocate memmap from the added memory range

Physical memory hotadd has to allocate a memmap (struct page array) for
the newly added memory section.  Currently, alloc_pages_node() is used
for those allocations.

This has some disadvantages:
 a) an existing memory is consumed for that purpose
    (eg: ~2MB per 128MB memory section on x86_64)
    This can even lead to extreme cases where system goes OOM because
    the physically hotplugged memory depletes the available memory before
    it is onlined.
 b) if the whole node is movable then we have off-node struct pages
    which has performance drawbacks.
 c) It might be there are no PMD_ALIGNED chunks so memmap array gets
    populated with base pages.

This can be improved when CONFIG_SPARSEMEM_VMEMMAP is enabled.

Vmemap page tables can map arbitrary memory.  That means that we can
reserve a part of the physically hotadded memory to back vmemmap page
tables.  This implementation uses the beginning of the hotplugged memory
for that purpose.

There are some non-obviously things to consider though.

Vmemmap pages are allocated/freed during the memory hotplug events
(add_memory_resource(), try_remove_memory()) when the memory is
added/removed.  This means that the reserved physical range is not
online although it is used.  The most obvious side effect is that
pfn_to_online_page() returns NULL for those pfns.  The current design
expects that this should be OK as the hotplugged memory is considered a
garbage until it is onlined.  For example hibernation wouldn't save the
content of those vmmemmaps into the image so it wouldn't be restored on
resume but this should be OK as there no real content to recover anyway
while metadata is reachable from other data structures (e.g.  vmemmap
page tables).

The reserved space is therefore (de)initialized during the {on,off}line
events (mhp_{de}init_memmap_on_memory).  That is done by extracting page
allocator independent initialization from the regular onlining path.
The primary reason to handle the reserved space outside of
{on,off}line_pages is to make each initialization specific to the
purpose rather than special case them in a single function.

As per above, the functions that are introduced are:

 - mhp_init_memmap_on_memory:
   Initializes vmemmap pages by calling move_pfn_range_to_zone(), calls
   kasan_add_zero_shadow(), and onlines as many sections as vmemmap pages
   fully span.

 - mhp_deinit_memmap_on_memory:
   Offlines as many sections as vmemmap pages fully span, removes the
   range from zhe zone by remove_pfn_range_from_zone(), and calls
   kasan_remove_zero_shadow() for the range.

The new function memory_block_online() calls mhp_init_memmap_on_memory()
before doing the actual online_pages().  Should online_pages() fail, we
clean up by calling mhp_deinit_memmap_on_memory().  Adjusting of
present_pages is done at the end once we know that online_pages()
succedeed.

On offline, memory_block_offline() needs to unaccount vmemmap pages from
present_pages() before calling offline_pages().  This is necessary because
offline_pages() tears down some structures based on the fact whether the
node or the zone become empty.  If offline_pages() fails, we account back
vmemmap pages.  If it succeeds, we call mhp_deinit_memmap_on_memory().

Hot-remove:

 We need to be careful when removing memory, as adding and
 removing memory needs to be done with the same granularity.
 To check that this assumption is not violated, we check the
 memory range we want to remove and if a) any memory block has
 vmemmap pages and b) the range spans more than a single memory
 block, we scream out loud and refuse to proceed.

 If all is good and the range was using memmap on memory (aka vmemmap pages),
 we construct an altmap structure so free_hugepage_table does the right
 thing and calls vmem_altmap_free instead of free_pagetable.

Link: https://lkml.kernel.org/r/20210421102701.25051-5-osalvador@suse.de
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/base/memory.c          |  72 ++++++++++++++++--
 include/linux/memory.h         |   8 +-
 include/linux/memory_hotplug.h |  15 +++-
 include/linux/memremap.h       |   2 +-
 include/linux/mmzone.h         |   7 +-
 mm/Kconfig                     |   5 ++
 mm/memory_hotplug.c            | 161 ++++++++++++++++++++++++++++++++++++++---
 mm/sparse.c                    |   2 -
 8 files changed, 250 insertions(+), 22 deletions(-)

(limited to 'drivers')

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index f209925a5d4e..b31b3af5c490 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -173,16 +173,73 @@ static int memory_block_online(struct memory_block *mem)
 {
 	unsigned long start_pfn = section_nr_to_pfn(mem->start_section_nr);
 	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
+	unsigned long nr_vmemmap_pages = mem->nr_vmemmap_pages;
+	struct zone *zone;
+	int ret;
+
+	zone = zone_for_pfn_range(mem->online_type, mem->nid, start_pfn, nr_pages);
+
+	/*
+	 * Although vmemmap pages have a different lifecycle than the pages
+	 * they describe (they remain until the memory is unplugged), doing
+	 * their initialization and accounting at memory onlining/offlining
+	 * stage helps to keep accounting easier to follow - e.g vmemmaps
+	 * belong to the same zone as the memory they backed.
+	 */
+	if (nr_vmemmap_pages) {
+		ret = mhp_init_memmap_on_memory(start_pfn, nr_vmemmap_pages, zone);
+		if (ret)
+			return ret;
+	}
+
+	ret = online_pages(start_pfn + nr_vmemmap_pages,
+			   nr_pages - nr_vmemmap_pages, zone);
+	if (ret) {
+		if (nr_vmemmap_pages)
+			mhp_deinit_memmap_on_memory(start_pfn, nr_vmemmap_pages);
+		return ret;
+	}
+
+	/*
+	 * Account once onlining succeeded. If the zone was unpopulated, it is
+	 * now already properly populated.
+	 */
+	if (nr_vmemmap_pages)
+		adjust_present_page_count(zone, nr_vmemmap_pages);
 
-	return online_pages(start_pfn, nr_pages, mem->online_type, mem->nid);
+	return ret;
 }
 
 static int memory_block_offline(struct memory_block *mem)
 {
 	unsigned long start_pfn = section_nr_to_pfn(mem->start_section_nr);
 	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
+	unsigned long nr_vmemmap_pages = mem->nr_vmemmap_pages;
+	struct zone *zone;
+	int ret;
+
+	zone = page_zone(pfn_to_page(start_pfn));
+
+	/*
+	 * Unaccount before offlining, such that unpopulated zone and kthreads
+	 * can properly be torn down in offline_pages().
+	 */
+	if (nr_vmemmap_pages)
+		adjust_present_page_count(zone, -nr_vmemmap_pages);
 
-	return offline_pages(start_pfn, nr_pages);
+	ret = offline_pages(start_pfn + nr_vmemmap_pages,
+			    nr_pages - nr_vmemmap_pages);
+	if (ret) {
+		/* offline_pages() failed. Account back. */
+		if (nr_vmemmap_pages)
+			adjust_present_page_count(zone, nr_vmemmap_pages);
+		return ret;
+	}
+
+	if (nr_vmemmap_pages)
+		mhp_deinit_memmap_on_memory(start_pfn, nr_vmemmap_pages);
+
+	return ret;
 }
 
 /*
@@ -576,7 +633,8 @@ int register_memory(struct memory_block *memory)
 	return ret;
 }
 
-static int init_memory_block(unsigned long block_id, unsigned long state)
+static int init_memory_block(unsigned long block_id, unsigned long state,
+			     unsigned long nr_vmemmap_pages)
 {
 	struct memory_block *mem;
 	int ret = 0;
@@ -593,6 +651,7 @@ static int init_memory_block(unsigned long block_id, unsigned long state)
 	mem->start_section_nr = block_id * sections_per_block;
 	mem->state = state;
 	mem->nid = NUMA_NO_NODE;
+	mem->nr_vmemmap_pages = nr_vmemmap_pages;
 
 	ret = register_memory(mem);
 
@@ -612,7 +671,7 @@ static int add_memory_block(unsigned long base_section_nr)
 	if (section_count == 0)
 		return 0;
 	return init_memory_block(memory_block_id(base_section_nr),
-				 MEM_ONLINE);
+				 MEM_ONLINE, 0);
 }
 
 static void unregister_memory(struct memory_block *memory)
@@ -634,7 +693,8 @@ static void unregister_memory(struct memory_block *memory)
  *
  * Called under device_hotplug_lock.
  */
-int create_memory_block_devices(unsigned long start, unsigned long size)
+int create_memory_block_devices(unsigned long start, unsigned long size,
+				unsigned long vmemmap_pages)
 {
 	const unsigned long start_block_id = pfn_to_block_id(PFN_DOWN(start));
 	unsigned long end_block_id = pfn_to_block_id(PFN_DOWN(start + size));
@@ -647,7 +707,7 @@ int create_memory_block_devices(unsigned long start, unsigned long size)
 		return -EINVAL;
 
 	for (block_id = start_block_id; block_id != end_block_id; block_id++) {
-		ret = init_memory_block(block_id, MEM_OFFLINE);
+		ret = init_memory_block(block_id, MEM_OFFLINE, vmemmap_pages);
 		if (ret)
 			break;
 	}
diff --git a/include/linux/memory.h b/include/linux/memory.h
index 4da95e684e20..97e92e8b556a 100644
--- a/include/linux/memory.h
+++ b/include/linux/memory.h
@@ -29,6 +29,11 @@ struct memory_block {
 	int online_type;		/* for passing data to online routine */
 	int nid;			/* NID for this memory block */
 	struct device dev;
+	/*
+	 * Number of vmemmap pages. These pages
+	 * lay at the beginning of the memory block.
+	 */
+	unsigned long nr_vmemmap_pages;
 };
 
 int arch_get_memory_phys_device(unsigned long start_pfn);
@@ -80,7 +85,8 @@ static inline int memory_notify(unsigned long val, void *v)
 #else
 extern int register_memory_notifier(struct notifier_block *nb);
 extern void unregister_memory_notifier(struct notifier_block *nb);
-int create_memory_block_devices(unsigned long start, unsigned long size);
+int create_memory_block_devices(unsigned long start, unsigned long size,
+				unsigned long vmemmap_pages);
 void remove_memory_block_devices(unsigned long start, unsigned long size);
 extern void memory_dev_init(void);
 extern int memory_notify(unsigned long val, void *v);
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 7288aa5ef73b..28f32fd00fe9 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -55,6 +55,14 @@ typedef int __bitwise mhp_t;
  */
 #define MHP_MERGE_RESOURCE	((__force mhp_t)BIT(0))
 
+/*
+ * We want memmap (struct page array) to be self contained.
+ * To do so, we will use the beginning of the hot-added range to build
+ * the page tables for the memmap array that describes the entire range.
+ * Only selected architectures support it with SPARSE_VMEMMAP.
+ */
+#define MHP_MEMMAP_ON_MEMORY   ((__force mhp_t)BIT(1))
+
 /*
  * Extended parameters for memory hotplug:
  * altmap: alternative allocator for memmap array (optional)
@@ -99,9 +107,13 @@ static inline void zone_seqlock_init(struct zone *zone)
 extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages);
 extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages);
 extern int add_one_highpage(struct page *page, int pfn, int bad_ppro);
+extern void adjust_present_page_count(struct zone *zone, long nr_pages);
 /* VM interface that may be used by firmware interface */
+extern int mhp_init_memmap_on_memory(unsigned long pfn, unsigned long nr_pages,
+				     struct zone *zone);
+extern void mhp_deinit_memmap_on_memory(unsigned long pfn, unsigned long nr_pages);
 extern int online_pages(unsigned long pfn, unsigned long nr_pages,
-			int online_type, int nid);
+			struct zone *zone);
 extern struct zone *test_pages_in_a_zone(unsigned long start_pfn,
 					 unsigned long end_pfn);
 extern void __offline_isolated_pages(unsigned long start_pfn,
@@ -359,6 +371,7 @@ extern struct zone *zone_for_pfn_range(int online_type, int nid, unsigned start_
 extern int arch_create_linear_mapping(int nid, u64 start, u64 size,
 				      struct mhp_params *params);
 void arch_remove_linear_mapping(u64 start, u64 size);
+extern bool mhp_supports_memmap_on_memory(unsigned long size);
 #endif /* CONFIG_MEMORY_HOTPLUG */
 
 #endif /* __LINUX_MEMORY_HOTPLUG_H */
diff --git a/include/linux/memremap.h b/include/linux/memremap.h
index f5b464daeeca..45a79da89c5f 100644
--- a/include/linux/memremap.h
+++ b/include/linux/memremap.h
@@ -17,7 +17,7 @@ struct device;
  * @alloc: track pages consumed, private to vmemmap_populate()
  */
 struct vmem_altmap {
-	const unsigned long base_pfn;
+	unsigned long base_pfn;
 	const unsigned long end_pfn;
 	const unsigned long reserve;
 	unsigned long free;
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index e8922a67d1a4..917bd6c604d5 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -436,6 +436,11 @@ enum zone_type {
 	 *    situations where ZERO_PAGE(0) which is allocated differently
 	 *    on different platforms may end up in a movable zone. ZERO_PAGE(0)
 	 *    cannot be migrated.
+	 * 7. Memory-hotplug: when using memmap_on_memory and onlining the
+	 *    memory to the MOVABLE zone, the vmemmap pages are also placed in
+	 *    such zone. Such pages cannot be really moved around as they are
+	 *    self-stored in the range, but they are treated as movable when
+	 *    the range they describe is about to be offlined.
 	 *
 	 * In general, no unmovable allocations that degrade memory offlining
 	 * should end up in ZONE_MOVABLE. Allocators (like alloc_contig_range())
@@ -1392,10 +1397,8 @@ static inline int online_section_nr(unsigned long nr)
 
 #ifdef CONFIG_MEMORY_HOTPLUG
 void online_mem_sections(unsigned long start_pfn, unsigned long end_pfn);
-#ifdef CONFIG_MEMORY_HOTREMOVE
 void offline_mem_sections(unsigned long start_pfn, unsigned long end_pfn);
 #endif
-#endif
 
 static inline struct mem_section *__pfn_to_section(unsigned long pfn)
 {
diff --git a/mm/Kconfig b/mm/Kconfig
index fe4897c3c81b..02d44e3420f5 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -188,6 +188,11 @@ config MEMORY_HOTREMOVE
 	depends on MEMORY_HOTPLUG && ARCH_ENABLE_MEMORY_HOTREMOVE
 	depends on MIGRATION
 
+config MHP_MEMMAP_ON_MEMORY
+	def_bool y
+	depends on MEMORY_HOTPLUG && SPARSEMEM_VMEMMAP
+	depends on ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
+
 # Heavily threaded applications may benefit from splitting the mm-wide
 # page_table_lock, so that faults on different parts of the user address
 # space can be handled with less contention: split it at this NR_CPUS.
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 04f01fabc150..0b3157836814 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -42,6 +42,8 @@
 #include "internal.h"
 #include "shuffle.h"
 
+static bool memmap_on_memory;
+
 /*
  * online_page_callback contains pointer to current page onlining function.
  * Initially it is generic_online_page(). If it is required it could be
@@ -648,9 +650,16 @@ static void online_pages_range(unsigned long start_pfn, unsigned long nr_pages)
 	 * decide to not expose all pages to the buddy (e.g., expose them
 	 * later). We account all pages as being online and belonging to this
 	 * zone ("present").
+	 * When using memmap_on_memory, the range might not be aligned to
+	 * MAX_ORDER_NR_PAGES - 1, but pageblock aligned. __ffs() will detect
+	 * this and the first chunk to online will be pageblock_nr_pages.
 	 */
-	for (pfn = start_pfn; pfn < end_pfn; pfn += MAX_ORDER_NR_PAGES)
-		(*online_page_callback)(pfn_to_page(pfn), MAX_ORDER - 1);
+	for (pfn = start_pfn; pfn < end_pfn;) {
+		int order = min(MAX_ORDER - 1UL, __ffs(pfn));
+
+		(*online_page_callback)(pfn_to_page(pfn), order);
+		pfn += (1UL << order);
+	}
 
 	/* mark all involved sections as online */
 	online_mem_sections(start_pfn, end_pfn);
@@ -829,7 +838,11 @@ struct zone * zone_for_pfn_range(int online_type, int nid, unsigned start_pfn,
 	return default_zone_for_pfn(nid, start_pfn, nr_pages);
 }
 
-static void adjust_present_page_count(struct zone *zone, long nr_pages)
+/*
+ * This function should only be called by memory_block_{online,offline},
+ * and {online,offline}_pages.
+ */
+void adjust_present_page_count(struct zone *zone, long nr_pages)
 {
 	unsigned long flags;
 
@@ -839,12 +852,54 @@ static void adjust_present_page_count(struct zone *zone, long nr_pages)
 	pgdat_resize_unlock(zone->zone_pgdat, &flags);
 }
 
-int __ref online_pages(unsigned long pfn, unsigned long nr_pages,
-		       int online_type, int nid)
+int mhp_init_memmap_on_memory(unsigned long pfn, unsigned long nr_pages,
+			      struct zone *zone)
+{
+	unsigned long end_pfn = pfn + nr_pages;
+	int ret;
+
+	ret = kasan_add_zero_shadow(__va(PFN_PHYS(pfn)), PFN_PHYS(nr_pages));
+	if (ret)
+		return ret;
+
+	move_pfn_range_to_zone(zone, pfn, nr_pages, NULL, MIGRATE_UNMOVABLE);
+
+	/*
+	 * It might be that the vmemmap_pages fully span sections. If that is
+	 * the case, mark those sections online here as otherwise they will be
+	 * left offline.
+	 */
+	if (nr_pages >= PAGES_PER_SECTION)
+	        online_mem_sections(pfn, ALIGN_DOWN(end_pfn, PAGES_PER_SECTION));
+
+	return ret;
+}
+
+void mhp_deinit_memmap_on_memory(unsigned long pfn, unsigned long nr_pages)
+{
+	unsigned long end_pfn = pfn + nr_pages;
+
+	/*
+	 * It might be that the vmemmap_pages fully span sections. If that is
+	 * the case, mark those sections offline here as otherwise they will be
+	 * left online.
+	 */
+	if (nr_pages >= PAGES_PER_SECTION)
+		offline_mem_sections(pfn, ALIGN_DOWN(end_pfn, PAGES_PER_SECTION));
+
+        /*
+	 * The pages associated with this vmemmap have been offlined, so
+	 * we can reset its state here.
+	 */
+	remove_pfn_range_from_zone(page_zone(pfn_to_page(pfn)), pfn, nr_pages);
+	kasan_remove_zero_shadow(__va(PFN_PHYS(pfn)), PFN_PHYS(nr_pages));
+}
+
+int __ref online_pages(unsigned long pfn, unsigned long nr_pages, struct zone *zone)
 {
 	unsigned long flags;
-	struct zone *zone;
 	int need_zonelists_rebuild = 0;
+	const int nid = zone_to_nid(zone);
 	int ret;
 	struct memory_notify arg;
 
@@ -863,7 +918,6 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages,
 	mem_hotplug_begin();
 
 	/* associate pfn range with the zone */
-	zone = zone_for_pfn_range(online_type, nid, pfn, nr_pages);
 	move_pfn_range_to_zone(zone, pfn, nr_pages, NULL, MIGRATE_ISOLATE);
 
 	arg.start_pfn = pfn;
@@ -1077,6 +1131,45 @@ static int online_memory_block(struct memory_block *mem, void *arg)
 	return device_online(&mem->dev);
 }
 
+bool mhp_supports_memmap_on_memory(unsigned long size)
+{
+	unsigned long nr_vmemmap_pages = size / PAGE_SIZE;
+	unsigned long vmemmap_size = nr_vmemmap_pages * sizeof(struct page);
+	unsigned long remaining_size = size - vmemmap_size;
+
+	/*
+	 * Besides having arch support and the feature enabled at runtime, we
+	 * need a few more assumptions to hold true:
+	 *
+	 * a) We span a single memory block: memory onlining/offlinin;g happens
+	 *    in memory block granularity. We don't want the vmemmap of online
+	 *    memory blocks to reside on offline memory blocks. In the future,
+	 *    we might want to support variable-sized memory blocks to make the
+	 *    feature more versatile.
+	 *
+	 * b) The vmemmap pages span complete PMDs: We don't want vmemmap code
+	 *    to populate memory from the altmap for unrelated parts (i.e.,
+	 *    other memory blocks)
+	 *
+	 * c) The vmemmap pages (and thereby the pages that will be exposed to
+	 *    the buddy) have to cover full pageblocks: memory onlining/offlining
+	 *    code requires applicable ranges to be page-aligned, for example, to
+	 *    set the migratetypes properly.
+	 *
+	 * TODO: Although we have a check here to make sure that vmemmap pages
+	 *       fully populate a PMD, it is not the right place to check for
+	 *       this. A much better solution involves improving vmemmap code
+	 *       to fallback to base pages when trying to populate vmemmap using
+	 *       altmap as an alternative source of memory, and we do not exactly
+	 *       populate a single PMD.
+	 */
+	return memmap_on_memory &&
+	       IS_ENABLED(CONFIG_MHP_MEMMAP_ON_MEMORY) &&
+	       size == memory_block_size_bytes() &&
+	       IS_ALIGNED(vmemmap_size, PMD_SIZE) &&
+	       IS_ALIGNED(remaining_size, (pageblock_nr_pages << PAGE_SHIFT));
+}
+
 /*
  * NOTE: The caller must call lock_device_hotplug() to serialize hotplug
  * and online/offline operations (triggered e.g. by sysfs).
@@ -1086,6 +1179,7 @@ static int online_memory_block(struct memory_block *mem, void *arg)
 int __ref add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags)
 {
 	struct mhp_params params = { .pgprot = pgprot_mhp(PAGE_KERNEL) };
+	struct vmem_altmap mhp_altmap = {};
 	u64 start, size;
 	bool new_node = false;
 	int ret;
@@ -1112,13 +1206,26 @@ int __ref add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags)
 		goto error;
 	new_node = ret;
 
+	/*
+	 * Self hosted memmap array
+	 */
+	if (mhp_flags & MHP_MEMMAP_ON_MEMORY) {
+		if (!mhp_supports_memmap_on_memory(size)) {
+			ret = -EINVAL;
+			goto error;
+		}
+		mhp_altmap.free = PHYS_PFN(size);
+		mhp_altmap.base_pfn = PHYS_PFN(start);
+		params.altmap = &mhp_altmap;
+	}
+
 	/* call arch's memory hotadd */
 	ret = arch_add_memory(nid, start, size, &params);
 	if (ret < 0)
 		goto error;
 
 	/* create memory block devices after memory was added */
-	ret = create_memory_block_devices(start, size);
+	ret = create_memory_block_devices(start, size, mhp_altmap.alloc);
 	if (ret) {
 		arch_remove_memory(nid, start, size, NULL);
 		goto error;
@@ -1767,6 +1874,14 @@ static int check_memblock_offlined_cb(struct memory_block *mem, void *arg)
 	return 0;
 }
 
+static int get_nr_vmemmap_pages_cb(struct memory_block *mem, void *arg)
+{
+	/*
+	 * If not set, continue with the next block.
+	 */
+	return mem->nr_vmemmap_pages;
+}
+
 static int check_cpu_on_node(pg_data_t *pgdat)
 {
 	int cpu;
@@ -1841,6 +1956,9 @@ EXPORT_SYMBOL(try_offline_node);
 static int __ref try_remove_memory(int nid, u64 start, u64 size)
 {
 	int rc = 0;
+	struct vmem_altmap mhp_altmap = {};
+	struct vmem_altmap *altmap = NULL;
+	unsigned long nr_vmemmap_pages;
 
 	BUG_ON(check_hotplug_memory_range(start, size));
 
@@ -1853,6 +1971,31 @@ static int __ref try_remove_memory(int nid, u64 start, u64 size)
 	if (rc)
 		return rc;
 
+	/*
+	 * We only support removing memory added with MHP_MEMMAP_ON_MEMORY in
+	 * the same granularity it was added - a single memory block.
+	 */
+	if (memmap_on_memory) {
+		nr_vmemmap_pages = walk_memory_blocks(start, size, NULL,
+						      get_nr_vmemmap_pages_cb);
+		if (nr_vmemmap_pages) {
+			if (size != memory_block_size_bytes()) {
+				pr_warn("Refuse to remove %#llx - %#llx,"
+					"wrong granularity\n",
+					start, start + size);
+				return -EINVAL;
+			}
+
+			/*
+			 * Let remove_pmd_table->free_hugepage_table do the
+			 * right thing if we used vmem_altmap when hot-adding
+			 * the range.
+			 */
+			mhp_altmap.alloc = nr_vmemmap_pages;
+			altmap = &mhp_altmap;
+		}
+	}
+
 	/* remove memmap entry */
 	firmware_map_remove(start, start + size, "System RAM");
 
@@ -1864,7 +2007,7 @@ static int __ref try_remove_memory(int nid, u64 start, u64 size)
 
 	mem_hotplug_begin();
 
-	arch_remove_memory(nid, start, size, NULL);
+	arch_remove_memory(nid, start, size, altmap);
 
 	if (IS_ENABLED(CONFIG_ARCH_KEEP_MEMBLOCK)) {
 		memblock_free(start, size);
diff --git a/mm/sparse.c b/mm/sparse.c
index 33406ea2ecc4..d3fbed26e64e 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -624,7 +624,6 @@ void online_mem_sections(unsigned long start_pfn, unsigned long end_pfn)
 	}
 }
 
-#ifdef CONFIG_MEMORY_HOTREMOVE
 /* Mark all memory sections within the pfn range as offline */
 void offline_mem_sections(unsigned long start_pfn, unsigned long end_pfn)
 {
@@ -645,7 +644,6 @@ void offline_mem_sections(unsigned long start_pfn, unsigned long end_pfn)
 		ms->section_mem_map &= ~SECTION_IS_ONLINE;
 	}
 }
-#endif
 
 #ifdef CONFIG_SPARSEMEM_VMEMMAP
 static struct page * __meminit populate_section_memmap(unsigned long pfn,
-- 
cgit v1.2.3


From 4a3e5de9c4ec41bb0684b0d4e0c16abc39617d88 Mon Sep 17 00:00:00 2001
From: Oscar Salvador <osalvador@suse.de>
Date: Tue, 4 May 2021 18:39:45 -0700
Subject: acpi,memhotplug: enable MHP_MEMMAP_ON_MEMORY when supported

Let the caller check whether it can pass MHP_MEMMAP_ON_MEMORY by
checking mhp_supports_memmap_on_memory().  MHP_MEMMAP_ON_MEMORY can only
be set in case ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE is enabled, the
architecture supports altmap, and the range to be added spans a single
memory block.

Link: https://lkml.kernel.org/r/20210421102701.25051-6-osalvador@suse.de
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/acpi/acpi_memhotplug.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index b02fd51e5589..8cc195c4c861 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -171,6 +171,7 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
 	acpi_handle handle = mem_device->device->handle;
 	int result, num_enabled = 0;
 	struct acpi_memory_info *info;
+	mhp_t mhp_flags = MHP_NONE;
 	int node;
 
 	node = acpi_get_node(handle);
@@ -194,8 +195,10 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
 		if (node < 0)
 			node = memory_add_physaddr_to_nid(info->start_addr);
 
+		if (mhp_supports_memmap_on_memory(info->length))
+			mhp_flags |= MHP_MEMMAP_ON_MEMORY;
 		result = __add_memory(node, info->start_addr, info->length,
-				      MHP_NONE);
+				      mhp_flags);
 
 		/*
 		 * If the memory block has been used by the kernel, add_memory()
-- 
cgit v1.2.3


From ac05a8a927e5a1027592d8f98510a511dadeed14 Mon Sep 17 00:00:00 2001
From: Hansem Ro <hansemro@outlook.com>
Date: Thu, 6 May 2021 13:27:10 -0700
Subject: Input: ili210x - add missing negation for touch indication on ili210x

This adds the negation needed for proper finger detection on Ilitek
ili2107/ili210x. This fixes polling issues (on Amazon Kindle Fire)
caused by returning false for the cooresponding finger on the touchscreen.

Signed-off-by: Hansem Ro <hansemro@outlook.com>
Fixes: e3559442afd2a ("ili210x - rework the touchscreen sample processing")
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/touchscreen/ili210x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/input/touchscreen/ili210x.c b/drivers/input/touchscreen/ili210x.c
index d8fccf048bf4..30576a5f2f04 100644
--- a/drivers/input/touchscreen/ili210x.c
+++ b/drivers/input/touchscreen/ili210x.c
@@ -87,7 +87,7 @@ static bool ili210x_touchdata_to_coords(const u8 *touchdata,
 					unsigned int *x, unsigned int *y,
 					unsigned int *z)
 {
-	if (touchdata[0] & BIT(finger))
+	if (!(touchdata[0] & BIT(finger)))
 		return false;
 
 	*x = get_unaligned_be16(touchdata + 1 + (finger * 4) + 0);
-- 
cgit v1.2.3


From 05665cef4b745cb46b1d1b8e96deaa25464092d3 Mon Sep 17 00:00:00 2001
From: Matt Reynolds <mattreynolds@chromium.org>
Date: Thu, 29 Apr 2021 15:29:37 -0700
Subject: Input: xpad - add support for Amazon Game Controller

The Amazon Luna controller (product name "Amazon Game Controller") behaves
like an Xbox 360 controller when connected over USB.

Signed-off-by: Matt Reynolds <mattreynolds@chromium.org>
Reviewed-by: Harry Cutts <hcutts@chromium.org>
Link: https://lore.kernel.org/r/20210429103548.1.If5f9a44cb81e25b9350f7c6c0b3c88b4ecd81166@changeid
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/joystick/xpad.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'drivers')

diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
index 9f0d07dcbf06..d69d7657ab12 100644
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -268,6 +268,7 @@ static const struct xpad_device {
 	{ 0x1689, 0xfd00, "Razer Onza Tournament Edition", 0, XTYPE_XBOX360 },
 	{ 0x1689, 0xfd01, "Razer Onza Classic Edition", 0, XTYPE_XBOX360 },
 	{ 0x1689, 0xfe00, "Razer Sabertooth", 0, XTYPE_XBOX360 },
+	{ 0x1949, 0x041a, "Amazon Game Controller", 0, XTYPE_XBOX360 },
 	{ 0x1bad, 0x0002, "Harmonix Rock Band Guitar", 0, XTYPE_XBOX360 },
 	{ 0x1bad, 0x0003, "Harmonix Rock Band Drumkit", MAP_DPAD_TO_BUTTONS, XTYPE_XBOX360 },
 	{ 0x1bad, 0x0130, "Ion Drum Rocker", MAP_DPAD_TO_BUTTONS, XTYPE_XBOX360 },
@@ -440,6 +441,7 @@ static const struct usb_device_id xpad_table[] = {
 	XPAD_XBOX360_VENDOR(0x15e4),		/* Numark X-Box 360 controllers */
 	XPAD_XBOX360_VENDOR(0x162e),		/* Joytech X-Box 360 controllers */
 	XPAD_XBOX360_VENDOR(0x1689),		/* Razer Onza */
+	XPAD_XBOX360_VENDOR(0x1949),		/* Amazon controllers */
 	XPAD_XBOX360_VENDOR(0x1bad),		/* Harminix Rock Band Guitar and Drums */
 	XPAD_XBOX360_VENDOR(0x20d6),		/* PowerA Controllers */
 	XPAD_XBOXONE_VENDOR(0x20d6),		/* PowerA Controllers */
-- 
cgit v1.2.3


From d4455faccd6cbe11ddfdbe28723a2122453b4f4e Mon Sep 17 00:00:00 2001
From: Alexey Dobriyan <adobriyan@gmail.com>
Date: Thu, 6 May 2021 18:02:16 -0700
Subject: proc: mandate ->proc_lseek in "struct proc_ops"

Now that proc_ops are separate from file_operations and other operations
it easy to check all instances to have ->proc_lseek hook and remove check
in main code.

Note:
nonseekable_open() files naturally don't require ->proc_lseek.

Garbage collect pde_lseek() function.

[adobriyan@gmail.com: smoke test lseek()]
  Link: https://lkml.kernel.org/r/YG4OIhChOrVTPgdN@localhost.localdomain

Link: https://lkml.kernel.org/r/YFYX0Bzwxlc7aBa/@localhost.localdomain
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/isdn/capi/kcapi_proc.c                     |  1 +
 drivers/net/wireless/intersil/hostap/hostap_proc.c |  1 +
 drivers/scsi/esas2r/esas2r_main.c                  |  1 +
 fs/proc/inode.c                                    | 14 ++------------
 include/linux/proc_fs.h                            |  1 +
 tools/testing/selftests/proc/read.c                |  4 +++-
 6 files changed, 9 insertions(+), 13 deletions(-)

(limited to 'drivers')

diff --git a/drivers/isdn/capi/kcapi_proc.c b/drivers/isdn/capi/kcapi_proc.c
index b5ed4ea145cb..77e951206809 100644
--- a/drivers/isdn/capi/kcapi_proc.c
+++ b/drivers/isdn/capi/kcapi_proc.c
@@ -201,6 +201,7 @@ static ssize_t empty_read(struct file *file, char __user *buf,
 
 static const struct proc_ops empty_proc_ops = {
 	.proc_read	= empty_read,
+	.proc_lseek	= default_llseek,
 };
 
 // ---------------------------------------------------------------------------
diff --git a/drivers/net/wireless/intersil/hostap/hostap_proc.c b/drivers/net/wireless/intersil/hostap/hostap_proc.c
index 97c270845fd1..51c847d98755 100644
--- a/drivers/net/wireless/intersil/hostap/hostap_proc.c
+++ b/drivers/net/wireless/intersil/hostap/hostap_proc.c
@@ -227,6 +227,7 @@ static ssize_t prism2_aux_dump_proc_no_read(struct file *file, char __user *buf,
 
 static const struct proc_ops prism2_aux_dump_proc_ops = {
 	.proc_read	= prism2_aux_dump_proc_no_read,
+	.proc_lseek	= default_llseek,
 };
 
 
diff --git a/drivers/scsi/esas2r/esas2r_main.c b/drivers/scsi/esas2r/esas2r_main.c
index 5d9eeac6717a..45ec9f16c085 100644
--- a/drivers/scsi/esas2r/esas2r_main.c
+++ b/drivers/scsi/esas2r/esas2r_main.c
@@ -616,6 +616,7 @@ static const struct file_operations esas2r_proc_fops = {
 };
 
 static const struct proc_ops esas2r_proc_ops = {
+	.proc_lseek		= default_llseek,
 	.proc_ioctl		= esas2r_proc_ioctl,
 #ifdef CONFIG_COMPAT
 	.proc_compat_ioctl	= compat_ptr_ioctl,
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index bde6b6f69852..2ea8aaa7206e 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -273,25 +273,15 @@ void proc_entry_rundown(struct proc_dir_entry *de)
 	spin_unlock(&de->pde_unload_lock);
 }
 
-static loff_t pde_lseek(struct proc_dir_entry *pde, struct file *file, loff_t offset, int whence)
-{
-	typeof_member(struct proc_ops, proc_lseek) lseek;
-
-	lseek = pde->proc_ops->proc_lseek;
-	if (!lseek)
-		lseek = default_llseek;
-	return lseek(file, offset, whence);
-}
-
 static loff_t proc_reg_llseek(struct file *file, loff_t offset, int whence)
 {
 	struct proc_dir_entry *pde = PDE(file_inode(file));
 	loff_t rv = -EINVAL;
 
 	if (pde_is_permanent(pde)) {
-		return pde_lseek(pde, file, offset, whence);
+		return pde->proc_ops->proc_lseek(file, offset, whence);
 	} else if (use_pde(pde)) {
-		rv = pde_lseek(pde, file, offset, whence);
+		rv = pde->proc_ops->proc_lseek(file, offset, whence);
 		unuse_pde(pde);
 	}
 	return rv;
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 000cc0533c33..069c7fd95396 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -32,6 +32,7 @@ struct proc_ops {
 	ssize_t	(*proc_read)(struct file *, char __user *, size_t, loff_t *);
 	ssize_t (*proc_read_iter)(struct kiocb *, struct iov_iter *);
 	ssize_t	(*proc_write)(struct file *, const char __user *, size_t, loff_t *);
+	/* mandatory unless nonseekable_open() or equivalent is used */
 	loff_t	(*proc_lseek)(struct file *, loff_t, int);
 	int	(*proc_release)(struct inode *, struct file *);
 	__poll_t (*proc_poll)(struct file *, struct poll_table_struct *);
diff --git a/tools/testing/selftests/proc/read.c b/tools/testing/selftests/proc/read.c
index b3ef9e14d6cc..35ee78dff144 100644
--- a/tools/testing/selftests/proc/read.c
+++ b/tools/testing/selftests/proc/read.c
@@ -14,7 +14,7 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 // Test
-// 1) read of every file in /proc
+// 1) read and lseek on every file in /proc
 // 2) readlink of every symlink in /proc
 // 3) recursively (1) + (2) for every directory in /proc
 // 4) write to /proc/*/clear_refs and /proc/*/task/*/clear_refs
@@ -45,6 +45,8 @@ static void f_reg(DIR *d, const char *filename)
 	fd = openat(dirfd(d), filename, O_RDONLY|O_NONBLOCK);
 	if (fd == -1)
 		return;
+	/* struct proc_ops::proc_lseek is mandatory if file is seekable. */
+	(void)lseek(fd, 0, SEEK_SET);
 	rv = read(fd, buf, sizeof(buf));
 	assert((0 <= rv && rv <= sizeof(buf)) || rv == -1);
 	close(fd);
-- 
cgit v1.2.3


From 4ee60ec156d91c315d1f62dfc1bc5799dcc6b473 Mon Sep 17 00:00:00 2001
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Date: Thu, 6 May 2021 18:02:27 -0700
Subject: include: remove pagemap.h from blkdev.h

My UEK-derived config has 1030 files depending on pagemap.h before this
change.  Afterwards, just 326 files need to be rebuilt when I touch
pagemap.h.  I think blkdev.h is probably included too widely, but
untangling that dependency is harder and this solves my problem.  x86
allmodconfig builds, but there may be implicit include problems on other
architectures.

Link: https://lkml.kernel.org/r/20210309195747.283796-1-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Dan Williams <dan.j.williams@intel.com>		[nvdimm]
Acked-by: Jens Axboe <axboe@kernel.dk>				[block]
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Coly Li <colyli@suse.de>				[bcache]
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>	[scsi]
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 block/blk-settings.c      | 1 +
 drivers/block/brd.c       | 1 +
 drivers/block/loop.c      | 1 +
 drivers/md/bcache/super.c | 1 +
 drivers/nvdimm/btt.c      | 1 +
 drivers/nvdimm/pmem.c     | 1 +
 drivers/scsi/scsicam.c    | 1 +
 include/linux/blkdev.h    | 1 -
 include/linux/swap.h      | 1 +
 9 files changed, 8 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/block/blk-settings.c b/block/blk-settings.c
index 9c009090c4b5..902c40d67120 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -7,6 +7,7 @@
 #include <linux/init.h>
 #include <linux/bio.h>
 #include <linux/blkdev.h>
+#include <linux/pagemap.h>
 #include <linux/gcd.h>
 #include <linux/lcm.h>
 #include <linux/jiffies.h>
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 6e622c1327ee..7562cf30b14e 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -18,6 +18,7 @@
 #include <linux/bio.h>
 #include <linux/highmem.h>
 #include <linux/mutex.h>
+#include <linux/pagemap.h>
 #include <linux/radix-tree.h>
 #include <linux/fs.h>
 #include <linux/slab.h>
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index a370cde3ddd4..d58d68f3c7cd 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -53,6 +53,7 @@
 #include <linux/moduleparam.h>
 #include <linux/sched.h>
 #include <linux/fs.h>
+#include <linux/pagemap.h>
 #include <linux/file.h>
 #include <linux/stat.h>
 #include <linux/errno.h>
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 2b6d6e9cd680..bea8c4429ae8 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -16,6 +16,7 @@
 #include "features.h"
 
 #include <linux/blkdev.h>
+#include <linux/pagemap.h>
 #include <linux/debugfs.h>
 #include <linux/genhd.h>
 #include <linux/idr.h>
diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c
index 41aa1f01fc07..18a267d5073f 100644
--- a/drivers/nvdimm/btt.c
+++ b/drivers/nvdimm/btt.c
@@ -6,6 +6,7 @@
 #include <linux/highmem.h>
 #include <linux/debugfs.h>
 #include <linux/blkdev.h>
+#include <linux/pagemap.h>
 #include <linux/module.h>
 #include <linux/device.h>
 #include <linux/mutex.h>
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 7daac795db39..ed10a8b66068 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -8,6 +8,7 @@
  */
 
 #include <linux/blkdev.h>
+#include <linux/pagemap.h>
 #include <linux/hdreg.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
diff --git a/drivers/scsi/scsicam.c b/drivers/scsi/scsicam.c
index f1553a453616..0ffdb8f2995f 100644
--- a/drivers/scsi/scsicam.c
+++ b/drivers/scsi/scsicam.c
@@ -17,6 +17,7 @@
 #include <linux/genhd.h>
 #include <linux/kernel.h>
 #include <linux/blkdev.h>
+#include <linux/pagemap.h>
 #include <linux/msdos_partition.h>
 #include <asm/unaligned.h>
 
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index b91ba6207365..1255823b2bc0 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -11,7 +11,6 @@
 #include <linux/minmax.h>
 #include <linux/timer.h>
 #include <linux/workqueue.h>
-#include <linux/pagemap.h>
 #include <linux/backing-dev-defs.h>
 #include <linux/wait.h>
 #include <linux/mempool.h>
diff --git a/include/linux/swap.h b/include/linux/swap.h
index f69e0f67651d..144727041e78 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -10,6 +10,7 @@
 #include <linux/sched.h>
 #include <linux/node.h>
 #include <linux/fs.h>
+#include <linux/pagemap.h>
 #include <linux/atomic.h>
 #include <linux/page-flags.h>
 #include <uapi/linux/mempolicy.h>
-- 
cgit v1.2.3


From e7cb072eb988e46295512617c39d004f9e1c26f8 Mon Sep 17 00:00:00 2001
From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Date: Thu, 6 May 2021 18:05:42 -0700
Subject: init/initramfs.c: do unpacking asynchronously

Patch series "background initramfs unpacking, and CONFIG_MODPROBE_PATH", v3.

These two patches are independent, but better-together.

The second is a rather trivial patch that simply allows the developer to
change "/sbin/modprobe" to something else - e.g.  the empty string, so
that all request_module() during early boot return -ENOENT early, without
even spawning a usermode helper, needlessly synchronizing with the
initramfs unpacking.

The first patch delegates decompressing the initramfs to a worker thread,
allowing do_initcalls() in main.c to proceed to the device_ and late_
initcalls without waiting for that decompression (and populating of
rootfs) to finish.  Obviously, some of those later calls may rely on the
initramfs being available, so I've added synchronization points in the
firmware loader and usermodehelper paths - there might be other places
that would need this, but so far no one has been able to think of any
places I have missed.

There's not much to win if most of the functionality needed during boot is
only available as modules.  But systems with a custom-made .config and
initramfs can boot faster, partly due to utilizing more than one cpu
earlier, partly by avoiding known-futile modprobe calls (which would still
trigger synchronization with the initramfs unpacking, thus eliminating
most of the first benefit).

This patch (of 2):

Most of the boot process doesn't actually need anything from the
initramfs, until of course PID1 is to be executed.  So instead of doing
the decompressing and populating of the initramfs synchronously in
populate_rootfs() itself, push that off to a worker thread.

This is primarily motivated by an embedded ppc target, where unpacking
even the rather modest sized initramfs takes 0.6 seconds, which is long
enough that the external watchdog becomes unhappy that it doesn't get
attention soon enough.  By doing the initramfs decompression in a worker
thread, we get to do the device_initcalls and hence start petting the
watchdog much sooner.

Normal desktops might benefit as well.  On my mostly stock Ubuntu kernel,
my initramfs is a 26M xz-compressed blob, decompressing to around 126M.
That takes almost two seconds:

[    0.201454] Trying to unpack rootfs image as initramfs...
[    1.976633] Freeing initrd memory: 29416K

Before this patch, these lines occur consecutively in dmesg.  With this
patch, the timestamps on these two lines is roughly the same as above, but
with 172 lines inbetween - so more than one cpu has been kept busy doing
work that would otherwise only happen after the populate_rootfs()
finished.

Should one of the initcalls done after rootfs_initcall time (i.e., device_
and late_ initcalls) need something from the initramfs (say, a kernel
module or a firmware blob), it will simply wait for the initramfs
unpacking to be done before proceeding, which should in theory make this
completely safe.

But if some driver pokes around in the filesystem directly and not via one
of the official kernel interfaces (i.e.  request_firmware*(),
call_usermodehelper*) that theory may not hold - also, I certainly might
have missed a spot when sprinkling wait_for_initramfs().  So there is an
escape hatch in the form of an initramfs_async= command line parameter.

Link: https://lkml.kernel.org/r/20210313212528.2956377-1-linux@rasmusvillemoes.dk
Link: https://lkml.kernel.org/r/20210313212528.2956377-2-linux@rasmusvillemoes.dk
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Jessica Yu <jeyu@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 Documentation/admin-guide/kernel-parameters.txt | 12 ++++++++
 drivers/base/firmware_loader/main.c             |  2 ++
 include/linux/initrd.h                          |  2 ++
 init/initramfs.c                                | 38 ++++++++++++++++++++++++-
 init/main.c                                     |  1 +
 kernel/umh.c                                    |  2 ++
 6 files changed, 56 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index d93fbc1c1917..7866cc1bd4a9 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1833,6 +1833,18 @@
 			initcall functions.  Useful for debugging built-in
 			modules and initcalls.
 
+	initramfs_async= [KNL]
+			Format: <bool>
+			Default: 1
+			This parameter controls whether the initramfs
+			image is unpacked asynchronously, concurrently
+			with devices being probed and
+			initialized. This should normally just work,
+			but as a debugging aid, one can get the
+			historical behaviour of the initramfs
+			unpacking being completed before device_ and
+			late_ initcalls.
+
 	initrd=		[BOOT] Specify the location of the initial ramdisk
 
 	initrdmem=	[KNL] Specify a physical address and size from which to
diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c
index 78355095e00d..4fdb8219cd08 100644
--- a/drivers/base/firmware_loader/main.c
+++ b/drivers/base/firmware_loader/main.c
@@ -15,6 +15,7 @@
 #include <linux/kernel_read_file.h>
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/initrd.h>
 #include <linux/timer.h>
 #include <linux/vmalloc.h>
 #include <linux/interrupt.h>
@@ -504,6 +505,7 @@ fw_get_filesystem_firmware(struct device *device, struct fw_priv *fw_priv,
 	if (!path)
 		return -ENOMEM;
 
+	wait_for_initramfs();
 	for (i = 0; i < ARRAY_SIZE(fw_path); i++) {
 		size_t file_size = 0;
 		size_t *file_size_ptr = NULL;
diff --git a/include/linux/initrd.h b/include/linux/initrd.h
index 85c15717af34..1bbe9af48dc3 100644
--- a/include/linux/initrd.h
+++ b/include/linux/initrd.h
@@ -20,8 +20,10 @@ extern void free_initrd_mem(unsigned long, unsigned long);
 
 #ifdef CONFIG_BLK_DEV_INITRD
 extern void __init reserve_initrd_mem(void);
+extern void wait_for_initramfs(void);
 #else
 static inline void __init reserve_initrd_mem(void) {}
+static inline void wait_for_initramfs(void) {}
 #endif
 
 extern phys_addr_t phys_initrd_start;
diff --git a/init/initramfs.c b/init/initramfs.c
index d677e8e717f1..af27abc59643 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <linux/init.h>
+#include <linux/async.h>
 #include <linux/fs.h>
 #include <linux/slab.h>
 #include <linux/types.h>
@@ -541,6 +542,14 @@ static int __init keepinitrd_setup(char *__unused)
 __setup("keepinitrd", keepinitrd_setup);
 #endif
 
+static bool __initdata initramfs_async = true;
+static int __init initramfs_async_setup(char *str)
+{
+	strtobool(str, &initramfs_async);
+	return 1;
+}
+__setup("initramfs_async=", initramfs_async_setup);
+
 extern char __initramfs_start[];
 extern unsigned long __initramfs_size;
 #include <linux/initrd.h>
@@ -658,7 +667,7 @@ static void __init populate_initrd_image(char *err)
 }
 #endif /* CONFIG_BLK_DEV_RAM */
 
-static int __init populate_rootfs(void)
+static void __init do_populate_rootfs(void *unused, async_cookie_t cookie)
 {
 	/* Load the built in initramfs */
 	char *err = unpack_to_rootfs(__initramfs_start, __initramfs_size);
@@ -693,6 +702,33 @@ done:
 	initrd_end = 0;
 
 	flush_delayed_fput();
+}
+
+static ASYNC_DOMAIN_EXCLUSIVE(initramfs_domain);
+static async_cookie_t initramfs_cookie;
+
+void wait_for_initramfs(void)
+{
+	if (!initramfs_cookie) {
+		/*
+		 * Something before rootfs_initcall wants to access
+		 * the filesystem/initramfs. Probably a bug. Make a
+		 * note, avoid deadlocking the machine, and let the
+		 * caller's access fail as it used to.
+		 */
+		pr_warn_once("wait_for_initramfs() called before rootfs_initcalls\n");
+		return;
+	}
+	async_synchronize_cookie_domain(initramfs_cookie + 1, &initramfs_domain);
+}
+EXPORT_SYMBOL_GPL(wait_for_initramfs);
+
+static int __init populate_rootfs(void)
+{
+	initramfs_cookie = async_schedule_domain(do_populate_rootfs, NULL,
+						 &initramfs_domain);
+	if (!initramfs_async)
+		wait_for_initramfs();
 	return 0;
 }
 rootfs_initcall(populate_rootfs);
diff --git a/init/main.c b/init/main.c
index dd11bfd10ead..11d34ccf5786 100644
--- a/init/main.c
+++ b/init/main.c
@@ -1561,6 +1561,7 @@ static noinline void __init kernel_init_freeable(void)
 
 	kunit_run_all_tests();
 
+	wait_for_initramfs();
 	console_on_rootfs();
 
 	/*
diff --git a/kernel/umh.c b/kernel/umh.c
index 3f646613a9d3..61f6b82c354b 100644
--- a/kernel/umh.c
+++ b/kernel/umh.c
@@ -27,6 +27,7 @@
 #include <linux/ptrace.h>
 #include <linux/async.h>
 #include <linux/uaccess.h>
+#include <linux/initrd.h>
 
 #include <trace/events/module.h>
 
@@ -107,6 +108,7 @@ static int call_usermodehelper_exec_async(void *data)
 
 	commit_creds(new);
 
+	wait_for_initramfs();
 	retval = kernel_execve(sub_info->path,
 			       (const char *const *)sub_info->argv,
 			       (const char *const *)sub_info->envp);
-- 
cgit v1.2.3


From bbcd53c960713507ae764bf81970651b5577b95a Mon Sep 17 00:00:00 2001
From: David Hildenbrand <david@redhat.com>
Date: Thu, 6 May 2021 18:05:55 -0700
Subject: drivers/char: remove /dev/kmem for good

Patch series "drivers/char: remove /dev/kmem for good".

Exploring /dev/kmem and /dev/mem in the context of memory hot(un)plug and
memory ballooning, I started questioning the existence of /dev/kmem.

Comparing it with the /proc/kcore implementation, it does not seem to be
able to deal with things like

a) Pages unmapped from the direct mapping (e.g., to be used by secretmem)
  -> kern_addr_valid(). virt_addr_valid() is not sufficient.

b) Special cases like gart aperture memory that is not to be touched
  -> mem_pfn_is_ram()

Unless I am missing something, it's at least broken in some cases and might
fault/crash the machine.

Looks like its existence has been questioned before in 2005 and 2010 [1],
after ~11 additional years, it might make sense to revive the discussion.

CONFIG_DEVKMEM is only enabled in a single defconfig (on purpose or by
mistake?).  All distributions disable it: in Ubuntu it has been disabled
for more than 10 years, in Debian since 2.6.31, in Fedora at least
starting with FC3, in RHEL starting with RHEL4, in SUSE starting from
15sp2, and OpenSUSE has it disabled as well.

1) /dev/kmem was popular for rootkits [2] before it got disabled
   basically everywhere. Ubuntu documents [3] "There is no modern user of
   /dev/kmem any more beyond attackers using it to load kernel rootkits.".
   RHEL documents in a BZ [5] "it served no practical purpose other than to
   serve as a potential security problem or to enable binary module drivers
   to access structures/functions they shouldn't be touching"

2) /proc/kcore is a decent interface to have a controlled way to read
   kernel memory for debugging puposes. (will need some extensions to
   deal with memory offlining/unplug, memory ballooning, and poisoned
   pages, though)

3) It might be useful for corner case debugging [1]. KDB/KGDB might be a
   better fit, especially, to write random memory; harder to shoot
   yourself into the foot.

4) "Kernel Memory Editor" [4] hasn't seen any updates since 2000 and seems
   to be incompatible with 64bit [1]. For educational purposes,
   /proc/kcore might be used to monitor value updates -- or older
   kernels can be used.

5) It's broken on arm64, and therefore, completely disabled there.

Looks like it's essentially unused and has been replaced by better
suited interfaces for individual tasks (/proc/kcore, KDB/KGDB). Let's
just remove it.

[1] https://lwn.net/Articles/147901/
[2] https://www.linuxjournal.com/article/10505
[3] https://wiki.ubuntu.com/Security/Features#A.2Fdev.2Fkmem_disabled
[4] https://sourceforge.net/projects/kme/
[5] https://bugzilla.redhat.com/show_bug.cgi?id=154796

Link: https://lkml.kernel.org/r/20210324102351.6932-1-david@redhat.com
Link: https://lkml.kernel.org/r/20210324102351.6932-2-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Alexander A. Klimov" <grandmaster@al2klimov.de>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Chris Zankel <chris@zankel.net>
Cc: Corentin Labbe <clabbe@baylibre.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Gregory Clement <gregory.clement@bootlin.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Hillf Danton <hdanton@sina.com>
Cc: huang ying <huang.ying.caritas@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: James Troup <james.troup@canonical.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kairui Song <kasong@redhat.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Niklas Schnelle <schnelle@linux.ibm.com>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@sonymobile.com>
Cc: openrisc@lists.librecores.org
Cc: Palmer Dabbelt <palmerdabbelt@google.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "Pavel Machek (CIP)" <pavel@denx.de>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Pierre Morel <pmorel@linux.ibm.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Rich Felker <dalias@libc.org>
Cc: Robert Richter <rric@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: sparclinux@vger.kernel.org
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Theodore Dubois <tblodt@icloud.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: William Cohen <wcohen@redhat.com>
Cc: Xiaoming Ni <nixiaoming@huawei.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 Documentation/admin-guide/devices.txt     |   2 +-
 arch/arm/configs/dove_defconfig           |   1 -
 arch/arm/configs/magician_defconfig       |   1 -
 arch/arm/configs/moxart_defconfig         |   1 -
 arch/arm/configs/mps2_defconfig           |   1 -
 arch/arm/configs/mvebu_v5_defconfig       |   1 -
 arch/arm/configs/xcep_defconfig           |   1 -
 arch/hexagon/configs/comet_defconfig      |   1 -
 arch/m68k/configs/amcore_defconfig        |   1 -
 arch/openrisc/configs/or1ksim_defconfig   |   1 -
 arch/sh/configs/edosk7705_defconfig       |   1 -
 arch/sh/configs/se7206_defconfig          |   1 -
 arch/sh/configs/sh2007_defconfig          |   1 -
 arch/sh/configs/sh7724_generic_defconfig  |   1 -
 arch/sh/configs/sh7770_generic_defconfig  |   1 -
 arch/sh/configs/sh7785lcr_32bit_defconfig |   1 -
 arch/sparc/configs/sparc64_defconfig      |   1 -
 arch/xtensa/configs/xip_kc705_defconfig   |   1 -
 drivers/char/Kconfig                      |  10 --
 drivers/char/mem.c                        | 231 ------------------------------
 include/linux/fs.h                        |   2 +-
 include/linux/vmalloc.h                   |   2 +-
 kernel/configs/android-base.config        |   1 -
 mm/ksm.c                                  |   2 +-
 mm/vmalloc.c                              |   2 +-
 25 files changed, 5 insertions(+), 264 deletions(-)

(limited to 'drivers')

diff --git a/Documentation/admin-guide/devices.txt b/Documentation/admin-guide/devices.txt
index ef41f77cb979..9c2be821c225 100644
--- a/Documentation/admin-guide/devices.txt
+++ b/Documentation/admin-guide/devices.txt
@@ -4,7 +4,7 @@
 
    1 char	Memory devices
 		  1 = /dev/mem		Physical memory access
-		  2 = /dev/kmem		Kernel virtual memory access
+		  2 = /dev/kmem		OBSOLETE - replaced by /proc/kcore
 		  3 = /dev/null		Null device
 		  4 = /dev/port		I/O port access
 		  5 = /dev/zero		Null byte source
diff --git a/arch/arm/configs/dove_defconfig b/arch/arm/configs/dove_defconfig
index e70c997d5f4c..b935162a8bba 100644
--- a/arch/arm/configs/dove_defconfig
+++ b/arch/arm/configs/dove_defconfig
@@ -63,7 +63,6 @@ CONFIG_INPUT_EVDEV=y
 # CONFIG_MOUSE_PS2 is not set
 # CONFIG_SERIO is not set
 CONFIG_LEGACY_PTY_COUNT=16
-# CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_RUNTIME_UARTS=2
diff --git a/arch/arm/configs/magician_defconfig b/arch/arm/configs/magician_defconfig
index b4670d42f378..abde1fb23b20 100644
--- a/arch/arm/configs/magician_defconfig
+++ b/arch/arm/configs/magician_defconfig
@@ -72,7 +72,6 @@ CONFIG_INPUT_TOUCHSCREEN=y
 CONFIG_INPUT_MISC=y
 CONFIG_INPUT_UINPUT=m
 # CONFIG_SERIO is not set
-# CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_PXA=y
 # CONFIG_LEGACY_PTYS is not set
 # CONFIG_HW_RANDOM is not set
diff --git a/arch/arm/configs/moxart_defconfig b/arch/arm/configs/moxart_defconfig
index 6834e97af348..eacc089d86c5 100644
--- a/arch/arm/configs/moxart_defconfig
+++ b/arch/arm/configs/moxart_defconfig
@@ -79,7 +79,6 @@ CONFIG_INPUT_EVBUG=y
 # CONFIG_SERIO is not set
 # CONFIG_VT is not set
 # CONFIG_LEGACY_PTYS is not set
-# CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_NR_UARTS=1
diff --git a/arch/arm/configs/mps2_defconfig b/arch/arm/configs/mps2_defconfig
index 1d923dbb9928..89f4a6ff30bd 100644
--- a/arch/arm/configs/mps2_defconfig
+++ b/arch/arm/configs/mps2_defconfig
@@ -69,7 +69,6 @@ CONFIG_SMSC911X=y
 # CONFIG_VT is not set
 # CONFIG_LEGACY_PTYS is not set
 CONFIG_SERIAL_NONSTANDARD=y
-# CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_MPS2_UART_CONSOLE=y
 CONFIG_SERIAL_MPS2_UART=y
 # CONFIG_HW_RANDOM is not set
diff --git a/arch/arm/configs/mvebu_v5_defconfig b/arch/arm/configs/mvebu_v5_defconfig
index 4f16716bfc32..d57ff30dabff 100644
--- a/arch/arm/configs/mvebu_v5_defconfig
+++ b/arch/arm/configs/mvebu_v5_defconfig
@@ -100,7 +100,6 @@ CONFIG_INPUT_EVDEV=y
 CONFIG_KEYBOARD_GPIO=y
 # CONFIG_INPUT_MOUSE is not set
 CONFIG_LEGACY_PTY_COUNT=16
-# CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_RUNTIME_UARTS=2
diff --git a/arch/arm/configs/xcep_defconfig b/arch/arm/configs/xcep_defconfig
index f1fbdfc5c8c6..4d8e7f2eaef7 100644
--- a/arch/arm/configs/xcep_defconfig
+++ b/arch/arm/configs/xcep_defconfig
@@ -53,7 +53,6 @@ CONFIG_NET_ETHERNET=y
 # CONFIG_INPUT_KEYBOARD is not set
 # CONFIG_INPUT_MOUSE is not set
 # CONFIG_SERIO is not set
-# CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_PXA=y
 CONFIG_SERIAL_PXA_CONSOLE=y
 # CONFIG_LEGACY_PTYS is not set
diff --git a/arch/hexagon/configs/comet_defconfig b/arch/hexagon/configs/comet_defconfig
index f19ae2ab0aaa..c5a214716a38 100644
--- a/arch/hexagon/configs/comet_defconfig
+++ b/arch/hexagon/configs/comet_defconfig
@@ -34,7 +34,6 @@ CONFIG_NET_ETHERNET=y
 # CONFIG_SERIO is not set
 # CONFIG_CONSOLE_TRANSLATIONS is not set
 CONFIG_LEGACY_PTY_COUNT=64
-# CONFIG_DEVKMEM is not set
 # CONFIG_HW_RANDOM is not set
 CONFIG_SPI=y
 CONFIG_SPI_DEBUG=y
diff --git a/arch/m68k/configs/amcore_defconfig b/arch/m68k/configs/amcore_defconfig
index 3a84f24d41c8..6d9ed2198170 100644
--- a/arch/m68k/configs/amcore_defconfig
+++ b/arch/m68k/configs/amcore_defconfig
@@ -60,7 +60,6 @@ CONFIG_DM9000=y
 # CONFIG_VT is not set
 # CONFIG_UNIX98_PTYS is not set
 # CONFIG_DEVMEM is not set
-# CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_MCF=y
 CONFIG_SERIAL_MCF_BAUDRATE=115200
 CONFIG_SERIAL_MCF_CONSOLE=y
diff --git a/arch/openrisc/configs/or1ksim_defconfig b/arch/openrisc/configs/or1ksim_defconfig
index 75f2da324d0e..6e1e004047c7 100644
--- a/arch/openrisc/configs/or1ksim_defconfig
+++ b/arch/openrisc/configs/or1ksim_defconfig
@@ -43,7 +43,6 @@ CONFIG_MICREL_PHY=y
 # CONFIG_SERIO is not set
 # CONFIG_VT is not set
 # CONFIG_LEGACY_PTYS is not set
-# CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_OF_PLATFORM=y
diff --git a/arch/sh/configs/edosk7705_defconfig b/arch/sh/configs/edosk7705_defconfig
index ef7cc31997b1..9ee35269bee2 100644
--- a/arch/sh/configs/edosk7705_defconfig
+++ b/arch/sh/configs/edosk7705_defconfig
@@ -23,7 +23,6 @@ CONFIG_SH_PCLK_FREQ=31250000
 # CONFIG_INPUT is not set
 # CONFIG_SERIO is not set
 # CONFIG_VT is not set
-# CONFIG_DEVKMEM is not set
 # CONFIG_UNIX98_PTYS is not set
 # CONFIG_LEGACY_PTYS is not set
 # CONFIG_HW_RANDOM is not set
diff --git a/arch/sh/configs/se7206_defconfig b/arch/sh/configs/se7206_defconfig
index 315b04a8dd2f..601d062250d1 100644
--- a/arch/sh/configs/se7206_defconfig
+++ b/arch/sh/configs/se7206_defconfig
@@ -71,7 +71,6 @@ CONFIG_SMC91X=y
 # CONFIG_INPUT is not set
 # CONFIG_SERIO is not set
 # CONFIG_VT is not set
-# CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_SH_SCI=y
 CONFIG_SERIAL_SH_SCI_NR_UARTS=4
 CONFIG_SERIAL_SH_SCI_CONSOLE=y
diff --git a/arch/sh/configs/sh2007_defconfig b/arch/sh/configs/sh2007_defconfig
index 99975db461d8..79f02f1c0dc8 100644
--- a/arch/sh/configs/sh2007_defconfig
+++ b/arch/sh/configs/sh2007_defconfig
@@ -75,7 +75,6 @@ CONFIG_INPUT_FF_MEMLESS=y
 # CONFIG_INPUT_MOUSE is not set
 # CONFIG_SERIO is not set
 CONFIG_VT_HW_CONSOLE_BINDING=y
-# CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_SH_SCI=y
 CONFIG_SERIAL_SH_SCI_CONSOLE=y
 # CONFIG_LEGACY_PTYS is not set
diff --git a/arch/sh/configs/sh7724_generic_defconfig b/arch/sh/configs/sh7724_generic_defconfig
index 2c46c0004780..cbc9389a89a8 100644
--- a/arch/sh/configs/sh7724_generic_defconfig
+++ b/arch/sh/configs/sh7724_generic_defconfig
@@ -18,7 +18,6 @@ CONFIG_CPU_IDLE=y
 # CONFIG_INPUT is not set
 # CONFIG_SERIO is not set
 # CONFIG_VT is not set
-# CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_SH_SCI=y
 CONFIG_SERIAL_SH_SCI_NR_UARTS=6
 CONFIG_SERIAL_SH_SCI_CONSOLE=y
diff --git a/arch/sh/configs/sh7770_generic_defconfig b/arch/sh/configs/sh7770_generic_defconfig
index 88193153e51b..ee2357deba0f 100644
--- a/arch/sh/configs/sh7770_generic_defconfig
+++ b/arch/sh/configs/sh7770_generic_defconfig
@@ -20,7 +20,6 @@ CONFIG_CPU_IDLE=y
 # CONFIG_INPUT is not set
 # CONFIG_SERIO is not set
 # CONFIG_VT is not set
-# CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_SH_SCI=y
 CONFIG_SERIAL_SH_SCI_NR_UARTS=6
 CONFIG_SERIAL_SH_SCI_CONSOLE=y
diff --git a/arch/sh/configs/sh7785lcr_32bit_defconfig b/arch/sh/configs/sh7785lcr_32bit_defconfig
index 9b885c14c400..5c725c75fcef 100644
--- a/arch/sh/configs/sh7785lcr_32bit_defconfig
+++ b/arch/sh/configs/sh7785lcr_32bit_defconfig
@@ -66,7 +66,6 @@ CONFIG_INPUT_FF_MEMLESS=m
 CONFIG_INPUT_EVDEV=y
 CONFIG_INPUT_EVBUG=m
 CONFIG_VT_HW_CONSOLE_BINDING=y
-# CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_SH_SCI=y
 CONFIG_SERIAL_SH_SCI_NR_UARTS=6
 CONFIG_SERIAL_SH_SCI_CONSOLE=y
diff --git a/arch/sparc/configs/sparc64_defconfig b/arch/sparc/configs/sparc64_defconfig
index 12a4fb0bd52a..18099099583e 100644
--- a/arch/sparc/configs/sparc64_defconfig
+++ b/arch/sparc/configs/sparc64_defconfig
@@ -122,7 +122,6 @@ CONFIG_INPUT_SPARCSPKR=y
 # CONFIG_SERIO_SERPORT is not set
 CONFIG_SERIO_PCIPS2=m
 CONFIG_SERIO_RAW=m
-# CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_SUNSU=y
 CONFIG_SERIAL_SUNSU_CONSOLE=y
 CONFIG_SERIAL_SUNSAB=y
diff --git a/arch/xtensa/configs/xip_kc705_defconfig b/arch/xtensa/configs/xip_kc705_defconfig
index 4f1ff9531f6a..062148e17135 100644
--- a/arch/xtensa/configs/xip_kc705_defconfig
+++ b/arch/xtensa/configs/xip_kc705_defconfig
@@ -72,7 +72,6 @@ CONFIG_MARVELL_PHY=y
 # CONFIG_INPUT_KEYBOARD is not set
 # CONFIG_INPUT_MOUSE is not set
 # CONFIG_SERIO is not set
-CONFIG_DEVKMEM=y
 CONFIG_SERIAL_8250=y
 # CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index d229a2d0c017..b151e0fcdeb5 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -334,16 +334,6 @@ config DEVMEM
 	  memory.
 	  When in doubt, say "Y".
 
-config DEVKMEM
-	bool "/dev/kmem virtual device support"
-	# On arm64, VMALLOC_START < PAGE_OFFSET, which confuses kmem read/write
-	depends on !ARM64
-	help
-	  Say Y here if you want to support the /dev/kmem device. The
-	  /dev/kmem device is rarely used, but can be used for certain
-	  kind of kernel debugging operations.
-	  When in doubt, say "N".
-
 config NVRAM
 	tristate "/dev/nvram support"
 	depends on X86 || HAVE_ARCH_NVRAM_OPS
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 869b9f5e8e03..15dc54fa1d47 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -403,221 +403,6 @@ static int mmap_mem(struct file *file, struct vm_area_struct *vma)
 	return 0;
 }
 
-static int mmap_kmem(struct file *file, struct vm_area_struct *vma)
-{
-	unsigned long pfn;
-
-	/* Turn a kernel-virtual address into a physical page frame */
-	pfn = __pa((u64)vma->vm_pgoff << PAGE_SHIFT) >> PAGE_SHIFT;
-
-	/*
-	 * RED-PEN: on some architectures there is more mapped memory than
-	 * available in mem_map which pfn_valid checks for. Perhaps should add a
-	 * new macro here.
-	 *
-	 * RED-PEN: vmalloc is not supported right now.
-	 */
-	if (!pfn_valid(pfn))
-		return -EIO;
-
-	vma->vm_pgoff = pfn;
-	return mmap_mem(file, vma);
-}
-
-/*
- * This function reads the *virtual* memory as seen by the kernel.
- */
-static ssize_t read_kmem(struct file *file, char __user *buf,
-			 size_t count, loff_t *ppos)
-{
-	unsigned long p = *ppos;
-	ssize_t low_count, read, sz;
-	char *kbuf; /* k-addr because vread() takes vmlist_lock rwlock */
-	int err = 0;
-
-	read = 0;
-	if (p < (unsigned long) high_memory) {
-		low_count = count;
-		if (count > (unsigned long)high_memory - p)
-			low_count = (unsigned long)high_memory - p;
-
-#ifdef __ARCH_HAS_NO_PAGE_ZERO_MAPPED
-		/* we don't have page 0 mapped on sparc and m68k.. */
-		if (p < PAGE_SIZE && low_count > 0) {
-			sz = size_inside_page(p, low_count);
-			if (clear_user(buf, sz))
-				return -EFAULT;
-			buf += sz;
-			p += sz;
-			read += sz;
-			low_count -= sz;
-			count -= sz;
-		}
-#endif
-		while (low_count > 0) {
-			sz = size_inside_page(p, low_count);
-
-			/*
-			 * On ia64 if a page has been mapped somewhere as
-			 * uncached, then it must also be accessed uncached
-			 * by the kernel or data corruption may occur
-			 */
-			kbuf = xlate_dev_kmem_ptr((void *)p);
-			if (!virt_addr_valid(kbuf))
-				return -ENXIO;
-
-			if (copy_to_user(buf, kbuf, sz))
-				return -EFAULT;
-			buf += sz;
-			p += sz;
-			read += sz;
-			low_count -= sz;
-			count -= sz;
-			if (should_stop_iteration()) {
-				count = 0;
-				break;
-			}
-		}
-	}
-
-	if (count > 0) {
-		kbuf = (char *)__get_free_page(GFP_KERNEL);
-		if (!kbuf)
-			return -ENOMEM;
-		while (count > 0) {
-			sz = size_inside_page(p, count);
-			if (!is_vmalloc_or_module_addr((void *)p)) {
-				err = -ENXIO;
-				break;
-			}
-			sz = vread(kbuf, (char *)p, sz);
-			if (!sz)
-				break;
-			if (copy_to_user(buf, kbuf, sz)) {
-				err = -EFAULT;
-				break;
-			}
-			count -= sz;
-			buf += sz;
-			read += sz;
-			p += sz;
-			if (should_stop_iteration())
-				break;
-		}
-		free_page((unsigned long)kbuf);
-	}
-	*ppos = p;
-	return read ? read : err;
-}
-
-
-static ssize_t do_write_kmem(unsigned long p, const char __user *buf,
-				size_t count, loff_t *ppos)
-{
-	ssize_t written, sz;
-	unsigned long copied;
-
-	written = 0;
-#ifdef __ARCH_HAS_NO_PAGE_ZERO_MAPPED
-	/* we don't have page 0 mapped on sparc and m68k.. */
-	if (p < PAGE_SIZE) {
-		sz = size_inside_page(p, count);
-		/* Hmm. Do something? */
-		buf += sz;
-		p += sz;
-		count -= sz;
-		written += sz;
-	}
-#endif
-
-	while (count > 0) {
-		void *ptr;
-
-		sz = size_inside_page(p, count);
-
-		/*
-		 * On ia64 if a page has been mapped somewhere as uncached, then
-		 * it must also be accessed uncached by the kernel or data
-		 * corruption may occur.
-		 */
-		ptr = xlate_dev_kmem_ptr((void *)p);
-		if (!virt_addr_valid(ptr))
-			return -ENXIO;
-
-		copied = copy_from_user(ptr, buf, sz);
-		if (copied) {
-			written += sz - copied;
-			if (written)
-				break;
-			return -EFAULT;
-		}
-		buf += sz;
-		p += sz;
-		count -= sz;
-		written += sz;
-		if (should_stop_iteration())
-			break;
-	}
-
-	*ppos += written;
-	return written;
-}
-
-/*
- * This function writes to the *virtual* memory as seen by the kernel.
- */
-static ssize_t write_kmem(struct file *file, const char __user *buf,
-			  size_t count, loff_t *ppos)
-{
-	unsigned long p = *ppos;
-	ssize_t wrote = 0;
-	ssize_t virtr = 0;
-	char *kbuf; /* k-addr because vwrite() takes vmlist_lock rwlock */
-	int err = 0;
-
-	if (p < (unsigned long) high_memory) {
-		unsigned long to_write = min_t(unsigned long, count,
-					       (unsigned long)high_memory - p);
-		wrote = do_write_kmem(p, buf, to_write, ppos);
-		if (wrote != to_write)
-			return wrote;
-		p += wrote;
-		buf += wrote;
-		count -= wrote;
-	}
-
-	if (count > 0) {
-		kbuf = (char *)__get_free_page(GFP_KERNEL);
-		if (!kbuf)
-			return wrote ? wrote : -ENOMEM;
-		while (count > 0) {
-			unsigned long sz = size_inside_page(p, count);
-			unsigned long n;
-
-			if (!is_vmalloc_or_module_addr((void *)p)) {
-				err = -ENXIO;
-				break;
-			}
-			n = copy_from_user(kbuf, buf, sz);
-			if (n) {
-				err = -EFAULT;
-				break;
-			}
-			vwrite(kbuf, (char *)p, sz);
-			count -= sz;
-			buf += sz;
-			virtr += sz;
-			p += sz;
-			if (should_stop_iteration())
-				break;
-		}
-		free_page((unsigned long)kbuf);
-	}
-
-	*ppos = p;
-	return virtr + wrote ? : err;
-}
-
 static ssize_t read_port(struct file *file, char __user *buf,
 			 size_t count, loff_t *ppos)
 {
@@ -855,7 +640,6 @@ static int open_port(struct inode *inode, struct file *filp)
 #define write_zero	write_null
 #define write_iter_zero	write_iter_null
 #define open_mem	open_port
-#define open_kmem	open_mem
 
 static const struct file_operations __maybe_unused mem_fops = {
 	.llseek		= memory_lseek,
@@ -869,18 +653,6 @@ static const struct file_operations __maybe_unused mem_fops = {
 #endif
 };
 
-static const struct file_operations __maybe_unused kmem_fops = {
-	.llseek		= memory_lseek,
-	.read		= read_kmem,
-	.write		= write_kmem,
-	.mmap		= mmap_kmem,
-	.open		= open_kmem,
-#ifndef CONFIG_MMU
-	.get_unmapped_area = get_unmapped_area_mem,
-	.mmap_capabilities = memory_mmap_capabilities,
-#endif
-};
-
 static const struct file_operations null_fops = {
 	.llseek		= null_lseek,
 	.read		= read_null,
@@ -924,9 +696,6 @@ static const struct memdev {
 } devlist[] = {
 #ifdef CONFIG_DEVMEM
 	 [DEVMEM_MINOR] = { "mem", 0, &mem_fops, FMODE_UNSIGNED_OFFSET },
-#endif
-#ifdef CONFIG_DEVKMEM
-	 [2] = { "kmem", 0, &kmem_fops, FMODE_UNSIGNED_OFFSET },
 #endif
 	 [3] = { "null", 0666, &null_fops, 0 },
 #ifdef CONFIG_DEVPORT
diff --git a/include/linux/fs.h b/include/linux/fs.h
index acef282b97c6..c3c88fdb9b2a 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -145,7 +145,7 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
 /* Expect random access pattern */
 #define FMODE_RANDOM		((__force fmode_t)0x1000)
 
-/* File is huge (eg. /dev/kmem): treat loff_t as unsigned */
+/* File is huge (eg. /dev/mem): treat loff_t as unsigned */
 #define FMODE_UNSIGNED_OFFSET	((__force fmode_t)0x2000)
 
 /* File is opened with O_PATH; almost nothing can be done with it */
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 394d03cc0e92..f31ba59fb1ef 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -227,7 +227,7 @@ static inline void set_vm_flush_reset_perms(void *addr)
 }
 #endif
 
-/* for /dev/kmem */
+/* for /proc/kcore */
 extern long vread(char *buf, char *addr, unsigned long count);
 extern long vwrite(char *buf, char *addr, unsigned long count);
 
diff --git a/kernel/configs/android-base.config b/kernel/configs/android-base.config
index d3fd428f4b92..eb701b2ac72f 100644
--- a/kernel/configs/android-base.config
+++ b/kernel/configs/android-base.config
@@ -1,5 +1,4 @@
 #  KEEP ALPHABETICALLY SORTED
-# CONFIG_DEVKMEM is not set
 # CONFIG_DEVMEM is not set
 # CONFIG_FHANDLE is not set
 # CONFIG_INET_LRO is not set
diff --git a/mm/ksm.c b/mm/ksm.c
index b321a67ebaa9..b7cbcc7d4977 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -459,7 +459,7 @@ static inline bool ksm_test_exit(struct mm_struct *mm)
  * but taking great care only to touch a ksm page, in a VM_MERGEABLE vma,
  * in case the application has unmapped and remapped mm,addr meanwhile.
  * Could a ksm page appear anywhere else?  Actually yes, in a VM_PFNMAP
- * mmap of /dev/mem or /dev/kmem, where we would not want to touch it.
+ * mmap of /dev/mem, where we would not want to touch it.
  *
  * FAULT_FLAG/FOLL_REMOTE are because we do this outside the context
  * of the process that owns 'vma'.  We also do not want to enforce
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 9c539f0730a5..2868692c6807 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -3219,7 +3219,7 @@ static int aligned_vwrite(char *buf, char *addr, unsigned long count)
  * Note: In usual ops, vread() is never necessary because the caller
  * should know vmalloc() area is valid and can use memcpy().
  * This is for routines which have to access vmalloc area without
- * any information, as /dev/kmem.
+ * any information, as /proc/kcore.
  *
  * Return: number of bytes for which addr and buf should be increased
  * (same number as @count) or %0 if [addr...addr+count) doesn't
-- 
cgit v1.2.3


From fa60ce2cb4506701c43bd4cf3ca23d970daf1b9c Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Thu, 6 May 2021 18:06:44 -0700
Subject: treewide: remove editor modelines and cruft

The section "19) Editor modelines and other cruft" in
Documentation/process/coding-style.rst clearly says, "Do not include any
of these in source files."

I recently receive a patch to explicitly add a new one.

Let's do treewide cleanups, otherwise some people follow the existing code
and attempt to upstream their favoriate editor setups.

It is even nicer if scripts/checkpatch.pl can check it.

If we like to impose coding style in an editor-independent manner, I think
editorconfig (patch [1]) is a saner solution.

[1] https://lore.kernel.org/lkml/20200703073143.423557-1-danny@kdrag0n.dev/

Link: https://lkml.kernel.org/r/20210324054457.1477489-1-masahiroy@kernel.org
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>	[auxdisplay]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 arch/m68k/atari/time.c                               |  7 -------
 arch/parisc/include/asm/pdc_chassis.h                |  1 -
 arch/um/drivers/cow.h                                |  7 -------
 drivers/auxdisplay/panel.c                           |  7 -------
 drivers/gpu/drm/qxl/qxl_drv.c                        |  1 -
 drivers/media/usb/pwc/pwc-uncompress.c               |  3 ---
 drivers/net/ethernet/adaptec/starfire.c              |  8 --------
 drivers/net/ethernet/amd/atarilance.c                |  8 --------
 drivers/net/ethernet/amd/pcnet32.c                   |  7 -------
 .../net/wireless/intersil/orinoco/orinoco_nortel.c   |  8 --------
 drivers/net/wireless/intersil/orinoco/orinoco_pci.c  |  8 --------
 drivers/net/wireless/intersil/orinoco/orinoco_plx.c  |  8 --------
 drivers/net/wireless/intersil/orinoco/orinoco_tmd.c  |  8 --------
 drivers/parport/parport_ip32.c                       | 12 ------------
 drivers/platform/x86/dell/dell_rbu.c                 |  3 ---
 drivers/scsi/53c700.c                                |  1 -
 drivers/scsi/53c700.h                                |  1 -
 drivers/scsi/ch.c                                    |  6 ------
 drivers/scsi/ips.c                                   | 20 --------------------
 drivers/scsi/ips.h                                   | 20 --------------------
 drivers/scsi/lasi700.c                               |  1 -
 drivers/scsi/megaraid/mbox_defs.h                    |  2 --
 drivers/scsi/megaraid/mega_common.h                  |  2 --
 drivers/scsi/megaraid/megaraid_mbox.c                |  2 --
 drivers/scsi/megaraid/megaraid_mbox.h                |  2 --
 drivers/scsi/qla1280.c                               | 12 ------------
 drivers/scsi/sni_53c710.c                            |  1 -
 drivers/video/fbdev/matrox/matroxfb_base.c           |  9 ---------
 drivers/video/fbdev/vga16fb.c                        | 10 ----------
 fs/configfs/configfs_internal.h                      |  4 +---
 fs/configfs/dir.c                                    |  4 +---
 fs/configfs/file.c                                   |  4 +---
 fs/configfs/inode.c                                  |  4 +---
 fs/configfs/item.c                                   |  4 +---
 fs/configfs/mount.c                                  |  4 +---
 fs/configfs/symlink.c                                |  4 +---
 fs/nfs/dir.c                                         |  7 -------
 fs/nfs/nfs4proc.c                                    |  6 ------
 fs/nfs/nfs4renewd.c                                  |  6 ------
 fs/nfs/nfs4state.c                                   |  6 ------
 fs/nfs/nfs4xdr.c                                     |  6 ------
 fs/nfsd/nfs4proc.c                                   |  6 ------
 fs/nfsd/nfs4xdr.c                                    |  6 ------
 fs/nfsd/xdr4.h                                       |  6 ------
 fs/ocfs2/acl.c                                       |  4 +---
 fs/ocfs2/acl.h                                       |  4 +---
 fs/ocfs2/alloc.c                                     |  4 +---
 fs/ocfs2/alloc.h                                     |  4 +---
 fs/ocfs2/aops.c                                      |  4 +---
 fs/ocfs2/aops.h                                      |  4 +---
 fs/ocfs2/blockcheck.c                                |  4 +---
 fs/ocfs2/blockcheck.h                                |  4 +---
 fs/ocfs2/buffer_head_io.c                            |  4 +---
 fs/ocfs2/buffer_head_io.h                            |  4 +---
 fs/ocfs2/cluster/heartbeat.c                         |  4 +---
 fs/ocfs2/cluster/heartbeat.h                         |  4 +---
 fs/ocfs2/cluster/masklog.c                           |  4 +---
 fs/ocfs2/cluster/masklog.h                           |  4 +---
 fs/ocfs2/cluster/netdebug.c                          |  4 +---
 fs/ocfs2/cluster/nodemanager.c                       |  4 +---
 fs/ocfs2/cluster/nodemanager.h                       |  4 +---
 fs/ocfs2/cluster/ocfs2_heartbeat.h                   |  4 +---
 fs/ocfs2/cluster/ocfs2_nodemanager.h                 |  4 +---
 fs/ocfs2/cluster/quorum.c                            |  4 +---
 fs/ocfs2/cluster/quorum.h                            |  4 +---
 fs/ocfs2/cluster/sys.c                               |  4 +---
 fs/ocfs2/cluster/sys.h                               |  4 +---
 fs/ocfs2/cluster/tcp.c                               |  4 +---
 fs/ocfs2/cluster/tcp.h                               |  4 +---
 fs/ocfs2/cluster/tcp_internal.h                      |  4 +---
 fs/ocfs2/dcache.c                                    |  4 +---
 fs/ocfs2/dcache.h                                    |  4 +---
 fs/ocfs2/dir.c                                       |  4 +---
 fs/ocfs2/dir.h                                       |  4 +---
 fs/ocfs2/dlm/dlmapi.h                                |  4 +---
 fs/ocfs2/dlm/dlmast.c                                |  4 +---
 fs/ocfs2/dlm/dlmcommon.h                             |  4 +---
 fs/ocfs2/dlm/dlmconvert.c                            |  4 +---
 fs/ocfs2/dlm/dlmconvert.h                            |  4 +---
 fs/ocfs2/dlm/dlmdebug.c                              |  4 +---
 fs/ocfs2/dlm/dlmdebug.h                              |  4 +---
 fs/ocfs2/dlm/dlmdomain.c                             |  4 +---
 fs/ocfs2/dlm/dlmdomain.h                             |  4 +---
 fs/ocfs2/dlm/dlmlock.c                               |  4 +---
 fs/ocfs2/dlm/dlmmaster.c                             |  4 +---
 fs/ocfs2/dlm/dlmrecovery.c                           |  4 +---
 fs/ocfs2/dlm/dlmthread.c                             |  4 +---
 fs/ocfs2/dlm/dlmunlock.c                             |  4 +---
 fs/ocfs2/dlmfs/dlmfs.c                               |  4 +---
 fs/ocfs2/dlmfs/userdlm.c                             |  4 +---
 fs/ocfs2/dlmfs/userdlm.h                             |  4 +---
 fs/ocfs2/dlmglue.c                                   |  4 +---
 fs/ocfs2/dlmglue.h                                   |  4 +---
 fs/ocfs2/export.c                                    |  4 +---
 fs/ocfs2/export.h                                    |  4 +---
 fs/ocfs2/extent_map.c                                |  4 +---
 fs/ocfs2/extent_map.h                                |  4 +---
 fs/ocfs2/file.c                                      |  4 +---
 fs/ocfs2/file.h                                      |  4 +---
 fs/ocfs2/filecheck.c                                 |  4 +---
 fs/ocfs2/filecheck.h                                 |  4 +---
 fs/ocfs2/heartbeat.c                                 |  4 +---
 fs/ocfs2/heartbeat.h                                 |  4 +---
 fs/ocfs2/inode.c                                     |  4 +---
 fs/ocfs2/inode.h                                     |  4 +---
 fs/ocfs2/journal.c                                   |  4 +---
 fs/ocfs2/journal.h                                   |  4 +---
 fs/ocfs2/localalloc.c                                |  4 +---
 fs/ocfs2/localalloc.h                                |  4 +---
 fs/ocfs2/locks.c                                     |  4 +---
 fs/ocfs2/locks.h                                     |  4 +---
 fs/ocfs2/mmap.c                                      |  4 +---
 fs/ocfs2/move_extents.c                              |  4 +---
 fs/ocfs2/move_extents.h                              |  4 +---
 fs/ocfs2/namei.c                                     |  4 +---
 fs/ocfs2/namei.h                                     |  4 +---
 fs/ocfs2/ocfs1_fs_compat.h                           |  4 +---
 fs/ocfs2/ocfs2.h                                     |  4 +---
 fs/ocfs2/ocfs2_fs.h                                  |  4 +---
 fs/ocfs2/ocfs2_ioctl.h                               |  4 +---
 fs/ocfs2/ocfs2_lockid.h                              |  4 +---
 fs/ocfs2/ocfs2_lockingver.h                          |  4 +---
 fs/ocfs2/refcounttree.c                              |  4 +---
 fs/ocfs2/refcounttree.h                              |  4 +---
 fs/ocfs2/reservations.c                              |  4 +---
 fs/ocfs2/reservations.h                              |  4 +---
 fs/ocfs2/resize.c                                    |  4 +---
 fs/ocfs2/resize.h                                    |  4 +---
 fs/ocfs2/slot_map.c                                  |  4 +---
 fs/ocfs2/slot_map.h                                  |  4 +---
 fs/ocfs2/stack_o2cb.c                                |  4 +---
 fs/ocfs2/stack_user.c                                |  4 +---
 fs/ocfs2/stackglue.c                                 |  4 +---
 fs/ocfs2/stackglue.h                                 |  4 +---
 fs/ocfs2/suballoc.c                                  |  4 +---
 fs/ocfs2/suballoc.h                                  |  4 +---
 fs/ocfs2/super.c                                     |  4 +---
 fs/ocfs2/super.h                                     |  4 +---
 fs/ocfs2/symlink.c                                   |  4 +---
 fs/ocfs2/symlink.h                                   |  4 +---
 fs/ocfs2/sysfile.c                                   |  4 +---
 fs/ocfs2/sysfile.h                                   |  4 +---
 fs/ocfs2/uptodate.c                                  |  4 +---
 fs/ocfs2/uptodate.h                                  |  4 +---
 fs/ocfs2/xattr.c                                     |  4 +---
 fs/ocfs2/xattr.h                                     |  4 +---
 fs/reiserfs/procfs.c                                 | 10 ----------
 include/linux/configfs.h                             |  4 +---
 include/linux/genl_magic_func.h                      |  1 -
 include/linux/genl_magic_struct.h                    |  1 -
 include/uapi/linux/if_bonding.h                      | 11 -----------
 include/uapi/linux/nfs4.h                            |  6 ------
 include/xen/interface/elfnote.h                      | 10 ----------
 include/xen/interface/hvm/hvm_vcpu.h                 | 10 ----------
 include/xen/interface/io/xenbus.h                    | 10 ----------
 samples/configfs/configfs_sample.c                   |  2 --
 tools/usb/hcd-tests.sh                               |  2 --
 157 files changed, 110 insertions(+), 627 deletions(-)

(limited to 'drivers')

diff --git a/arch/m68k/atari/time.c b/arch/m68k/atari/time.c
index 1068670cb741..7e44d0e9d0f8 100644
--- a/arch/m68k/atari/time.c
+++ b/arch/m68k/atari/time.c
@@ -317,10 +317,3 @@ int atari_tt_hwclk( int op, struct rtc_time *t )
 
     return( 0 );
 }
-
-/*
- * Local variables:
- *  c-indent-level: 4
- *  tab-width: 8
- * End:
- */
diff --git a/arch/parisc/include/asm/pdc_chassis.h b/arch/parisc/include/asm/pdc_chassis.h
index ae3e108d22ad..d6d82f53d3d0 100644
--- a/arch/parisc/include/asm/pdc_chassis.h
+++ b/arch/parisc/include/asm/pdc_chassis.h
@@ -365,4 +365,3 @@ void parisc_pdc_chassis_init(void);
 					 PDC_CHASSIS_EOM_SET		)
 
 #endif /* _PARISC_PDC_CHASSIS_H */
-/* vim: set ts=8 */
diff --git a/arch/um/drivers/cow.h b/arch/um/drivers/cow.h
index 103adac691ed..9a67c017000f 100644
--- a/arch/um/drivers/cow.h
+++ b/arch/um/drivers/cow.h
@@ -24,10 +24,3 @@ extern void cow_sizes(int version, __u64 size, int sectorsize, int align,
 		      int *data_offset_out);
 
 #endif
-
-/*
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/drivers/auxdisplay/panel.c b/drivers/auxdisplay/panel.c
index ff5755ee5694..eba04c0de7eb 100644
--- a/drivers/auxdisplay/panel.c
+++ b/drivers/auxdisplay/panel.c
@@ -1737,10 +1737,3 @@ module_init(panel_init_module);
 module_exit(panel_cleanup_module);
 MODULE_AUTHOR("Willy Tarreau");
 MODULE_LICENSE("GPL");
-
-/*
- * Local variables:
- *  c-indent-level: 4
- *  tab-width: 8
- * End:
- */
diff --git a/drivers/gpu/drm/qxl/qxl_drv.c b/drivers/gpu/drm/qxl/qxl_drv.c
index 1864467f1063..6754f578fed2 100644
--- a/drivers/gpu/drm/qxl/qxl_drv.c
+++ b/drivers/gpu/drm/qxl/qxl_drv.c
@@ -1,4 +1,3 @@
-/* vim: set ts=8 sw=8 tw=78 ai noexpandtab */
 /* qxl_drv.c -- QXL driver -*- linux-c -*-
  *
  * Copyright 2011 Red Hat, Inc.
diff --git a/drivers/media/usb/pwc/pwc-uncompress.c b/drivers/media/usb/pwc/pwc-uncompress.c
index abfc88391036..68bc3829c6b3 100644
--- a/drivers/media/usb/pwc/pwc-uncompress.c
+++ b/drivers/media/usb/pwc/pwc-uncompress.c
@@ -9,9 +9,6 @@
    Please send bug reports and support requests to <luc@saillard.org>.
    The decompression routines have been implemented by reverse-engineering the
    Nemosoft binary pwcx module. Caveat emptor.
-
-
-   vim: set ts=8:
 */
 
 #include <asm/current.h>
diff --git a/drivers/net/ethernet/adaptec/starfire.c b/drivers/net/ethernet/adaptec/starfire.c
index 555299737b51..7965e5e3c985 100644
--- a/drivers/net/ethernet/adaptec/starfire.c
+++ b/drivers/net/ethernet/adaptec/starfire.c
@@ -2070,11 +2070,3 @@ static void __exit starfire_cleanup (void)
 
 module_init(starfire_init);
 module_exit(starfire_cleanup);
-
-
-/*
- * Local variables:
- *  c-basic-offset: 8
- *  tab-width: 8
- * End:
- */
diff --git a/drivers/net/ethernet/amd/atarilance.c b/drivers/net/ethernet/amd/atarilance.c
index 961796abab35..c1eab916438f 100644
--- a/drivers/net/ethernet/amd/atarilance.c
+++ b/drivers/net/ethernet/amd/atarilance.c
@@ -1156,11 +1156,3 @@ static void __exit atarilance_module_exit(void)
 module_init(atarilance_module_init);
 module_exit(atarilance_module_exit);
 #endif /* MODULE */
-
-
-/*
- * Local variables:
- *  c-indent-level: 4
- *  tab-width: 4
- * End:
- */
diff --git a/drivers/net/ethernet/amd/pcnet32.c b/drivers/net/ethernet/amd/pcnet32.c
index aa412506832d..4100ab07e6b7 100644
--- a/drivers/net/ethernet/amd/pcnet32.c
+++ b/drivers/net/ethernet/amd/pcnet32.c
@@ -3029,10 +3029,3 @@ static void __exit pcnet32_cleanup_module(void)
 
 module_init(pcnet32_init_module);
 module_exit(pcnet32_cleanup_module);
-
-/*
- * Local variables:
- *  c-indent-level: 4
- *  tab-width: 8
- * End:
- */
diff --git a/drivers/net/wireless/intersil/orinoco/orinoco_nortel.c b/drivers/net/wireless/intersil/orinoco/orinoco_nortel.c
index 96a03d10a080..18bd0d9876c2 100644
--- a/drivers/net/wireless/intersil/orinoco/orinoco_nortel.c
+++ b/drivers/net/wireless/intersil/orinoco/orinoco_nortel.c
@@ -312,11 +312,3 @@ static void __exit orinoco_nortel_exit(void)
 
 module_init(orinoco_nortel_init);
 module_exit(orinoco_nortel_exit);
-
-/*
- * Local variables:
- *  c-indent-level: 8
- *  c-basic-offset: 8
- *  tab-width: 8
- * End:
- */
diff --git a/drivers/net/wireless/intersil/orinoco/orinoco_pci.c b/drivers/net/wireless/intersil/orinoco/orinoco_pci.c
index f3c86b07b1b9..7e3a6dd60c15 100644
--- a/drivers/net/wireless/intersil/orinoco/orinoco_pci.c
+++ b/drivers/net/wireless/intersil/orinoco/orinoco_pci.c
@@ -255,11 +255,3 @@ static void __exit orinoco_pci_exit(void)
 
 module_init(orinoco_pci_init);
 module_exit(orinoco_pci_exit);
-
-/*
- * Local variables:
- *  c-indent-level: 8
- *  c-basic-offset: 8
- *  tab-width: 8
- * End:
- */
diff --git a/drivers/net/wireless/intersil/orinoco/orinoco_plx.c b/drivers/net/wireless/intersil/orinoco/orinoco_plx.c
index 16dada94c774..73e6ae124013 100644
--- a/drivers/net/wireless/intersil/orinoco/orinoco_plx.c
+++ b/drivers/net/wireless/intersil/orinoco/orinoco_plx.c
@@ -360,11 +360,3 @@ static void __exit orinoco_plx_exit(void)
 
 module_init(orinoco_plx_init);
 module_exit(orinoco_plx_exit);
-
-/*
- * Local variables:
- *  c-indent-level: 8
- *  c-basic-offset: 8
- *  tab-width: 8
- * End:
- */
diff --git a/drivers/net/wireless/intersil/orinoco/orinoco_tmd.c b/drivers/net/wireless/intersil/orinoco/orinoco_tmd.c
index 9a9d335611ac..939d5a1dce97 100644
--- a/drivers/net/wireless/intersil/orinoco/orinoco_tmd.c
+++ b/drivers/net/wireless/intersil/orinoco/orinoco_tmd.c
@@ -235,11 +235,3 @@ static void __exit orinoco_tmd_exit(void)
 
 module_init(orinoco_tmd_init);
 module_exit(orinoco_tmd_exit);
-
-/*
- * Local variables:
- *  c-indent-level: 8
- *  c-basic-offset: 8
- *  tab-width: 8
- * End:
- */
diff --git a/drivers/parport/parport_ip32.c b/drivers/parport/parport_ip32.c
index 48b084e86dc6..0919ed99ba94 100644
--- a/drivers/parport/parport_ip32.c
+++ b/drivers/parport/parport_ip32.c
@@ -2224,15 +2224,3 @@ MODULE_PARM_DESC(features,
 		 ", bit 2: hardware SPP mode"
 		 ", bit 3: hardware EPP mode"
 		 ", bit 4: hardware ECP mode");
-
-/*--- Inform (X)Emacs about preferred coding style ---------------------*/
-/*
- * Local Variables:
- * mode: c
- * c-file-style: "linux"
- * indent-tabs-mode: t
- * tab-width: 8
- * fill-column: 78
- * ispell-local-dictionary: "american"
- * End:
- */
diff --git a/drivers/platform/x86/dell/dell_rbu.c b/drivers/platform/x86/dell/dell_rbu.c
index 03c3ff34bcf5..085ad0a0d22e 100644
--- a/drivers/platform/x86/dell/dell_rbu.c
+++ b/drivers/platform/x86/dell/dell_rbu.c
@@ -675,6 +675,3 @@ static __exit void dcdrbu_exit(void)
 
 module_exit(dcdrbu_exit);
 module_init(dcdrbu_init);
-
-/* vim:noet:ts=8:sw=8
-*/
diff --git a/drivers/scsi/53c700.c b/drivers/scsi/53c700.c
index ab42feab233f..77ccb96e5ed4 100644
--- a/drivers/scsi/53c700.c
+++ b/drivers/scsi/53c700.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8 -*- */
 
 /* NCR (or Symbios) 53c700 and 53c700-66 Driver
  *
diff --git a/drivers/scsi/53c700.h b/drivers/scsi/53c700.h
index c9f8c497babb..2df347ca91af 100644
--- a/drivers/scsi/53c700.h
+++ b/drivers/scsi/53c700.h
@@ -1,5 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/* -*- mode: c; c-basic-offset: 8 -*- */
 
 /* Driver for 53c700 and 53c700-66 chips from NCR and Symbios
  *
diff --git a/drivers/scsi/ch.c b/drivers/scsi/ch.c
index cb74ab1ae5a4..9b89c26ccfdb 100644
--- a/drivers/scsi/ch.c
+++ b/drivers/scsi/ch.c
@@ -1058,9 +1058,3 @@ static void __exit exit_ch_module(void)
 
 module_init(init_ch_module);
 module_exit(exit_ch_module);
-
-/*
- * Local variables:
- * c-basic-offset: 8
- * End:
- */
diff --git a/drivers/scsi/ips.c b/drivers/scsi/ips.c
index 1a3c534826ba..bc33d54a4011 100644
--- a/drivers/scsi/ips.c
+++ b/drivers/scsi/ips.c
@@ -7099,23 +7099,3 @@ ips_init_phase2(int index)
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("IBM ServeRAID Adapter Driver " IPS_VER_STRING);
 MODULE_VERSION(IPS_VER_STRING);
-
-
-/*
- * Overrides for Emacs so that we almost follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-indent-level: 2
- * c-brace-imaginary-offset: 0
- * c-brace-offset: -2
- * c-argdecl-indent: 2
- * c-label-offset: -2
- * c-continued-statement-offset: 2
- * c-continued-brace-offset: 0
- * indent-tabs-mode: nil
- * tab-width: 8
- * End:
- */
diff --git a/drivers/scsi/ips.h b/drivers/scsi/ips.h
index 6c0678fb9a67..65edf000e447 100644
--- a/drivers/scsi/ips.h
+++ b/drivers/scsi/ips.h
@@ -1211,23 +1211,3 @@ typedef struct {
       IPS_COMPAT_TAMPA, \
       IPS_COMPAT_KEYWEST \
    }
-
-
-/*
- * Overrides for Emacs so that we almost follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-indent-level: 2
- * c-brace-imaginary-offset: 0
- * c-brace-offset: -2
- * c-argdecl-indent: 2
- * c-label-offset: -2
- * c-continued-statement-offset: 2
- * c-continued-brace-offset: 0
- * indent-tabs-mode: nil
- * tab-width: 8
- * End:
- */
diff --git a/drivers/scsi/lasi700.c b/drivers/scsi/lasi700.c
index de71d240a56f..6d14a7a94d0b 100644
--- a/drivers/scsi/lasi700.c
+++ b/drivers/scsi/lasi700.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8 -*- */
 
 /* PARISC LASI driver for the 53c700 chip
  *
diff --git a/drivers/scsi/megaraid/mbox_defs.h b/drivers/scsi/megaraid/mbox_defs.h
index 01a1bfb8ea2a..f0ef8f7f82c1 100644
--- a/drivers/scsi/megaraid/mbox_defs.h
+++ b/drivers/scsi/megaraid/mbox_defs.h
@@ -781,5 +781,3 @@ typedef struct {
 } __attribute__ ((packed)) mbox_sgl32;
 
 #endif		// _MRAID_MBOX_DEFS_H_
-
-/* vim: set ts=8 sw=8 tw=78: */
diff --git a/drivers/scsi/megaraid/mega_common.h b/drivers/scsi/megaraid/mega_common.h
index 3a7596e47a88..2ad0aa2f837d 100644
--- a/drivers/scsi/megaraid/mega_common.h
+++ b/drivers/scsi/megaraid/mega_common.h
@@ -282,5 +282,3 @@ struct mraid_pci_blk {
 };
 
 #endif // _MEGA_COMMON_H_
-
-// vim: set ts=8 sw=8 tw=78:
diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c
index b1a2d3536add..145fde302d7d 100644
--- a/drivers/scsi/megaraid/megaraid_mbox.c
+++ b/drivers/scsi/megaraid/megaraid_mbox.c
@@ -4068,5 +4068,3 @@ megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, cha
  */
 module_init(megaraid_init);
 module_exit(megaraid_exit);
-
-/* vim: set ts=8 sw=8 tw=78 ai si: */
diff --git a/drivers/scsi/megaraid/megaraid_mbox.h b/drivers/scsi/megaraid/megaraid_mbox.h
index 3e4347c6dab1..d2fe7f69cd5d 100644
--- a/drivers/scsi/megaraid/megaraid_mbox.h
+++ b/drivers/scsi/megaraid/megaraid_mbox.h
@@ -230,5 +230,3 @@ typedef struct {
 #define WROUTDOOR(rdev, value)	writel(value, (rdev)->baseaddr + 0x2C)
 
 #endif // _MEGARAID_H_
-
-// vim: set ts=8 sw=8 tw=78:
diff --git a/drivers/scsi/qla1280.c b/drivers/scsi/qla1280.c
index 8f35174a1f9a..928da90b79be 100644
--- a/drivers/scsi/qla1280.c
+++ b/drivers/scsi/qla1280.c
@@ -4403,15 +4403,3 @@ MODULE_FIRMWARE("qlogic/1040.bin");
 MODULE_FIRMWARE("qlogic/1280.bin");
 MODULE_FIRMWARE("qlogic/12160.bin");
 MODULE_VERSION(QLA1280_VERSION);
-
-/*
- * Overrides for Emacs so that we almost follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-basic-offset: 8
- * tab-width: 8
- * End:
- */
diff --git a/drivers/scsi/sni_53c710.c b/drivers/scsi/sni_53c710.c
index 97c6f81b1d2a..678651b9b4dd 100644
--- a/drivers/scsi/sni_53c710.c
+++ b/drivers/scsi/sni_53c710.c
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8 -*- */
 
 /* SNI RM driver
  *
diff --git a/drivers/video/fbdev/matrox/matroxfb_base.c b/drivers/video/fbdev/matrox/matroxfb_base.c
index a3853421b263..4325bf7f388c 100644
--- a/drivers/video/fbdev/matrox/matroxfb_base.c
+++ b/drivers/video/fbdev/matrox/matroxfb_base.c
@@ -2608,12 +2608,3 @@ EXPORT_SYMBOL(matroxfb_register_driver);
 EXPORT_SYMBOL(matroxfb_unregister_driver);
 EXPORT_SYMBOL(matroxfb_wait_for_sync);
 EXPORT_SYMBOL(matroxfb_enable_irq);
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-basic-offset: 8
- * End:
- */
-
diff --git a/drivers/video/fbdev/vga16fb.c b/drivers/video/fbdev/vga16fb.c
index 1e8a38a7967d..e2757ff1c23d 100644
--- a/drivers/video/fbdev/vga16fb.c
+++ b/drivers/video/fbdev/vga16fb.c
@@ -1451,13 +1451,3 @@ MODULE_DESCRIPTION("Legacy VGA framebuffer device driver");
 MODULE_LICENSE("GPL");
 module_init(vga16fb_init);
 module_exit(vga16fb_exit);
-
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-basic-offset: 8
- * End:
- */
-
diff --git a/fs/configfs/configfs_internal.h b/fs/configfs/configfs_internal.h
index 9a3aed249692..c0395363eab9 100644
--- a/fs/configfs/configfs_internal.h
+++ b/fs/configfs/configfs_internal.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset:8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * configfs_internal.h - Internal stuff for configfs
  *
  * Based on sysfs:
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index b6098e02e20b..ac5e0c0e9181 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dir.c - Operations for configfs directories.
  *
  * Based on sysfs:
diff --git a/fs/configfs/file.c b/fs/configfs/file.c
index da8351d1e455..e26060dae70a 100644
--- a/fs/configfs/file.c
+++ b/fs/configfs/file.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * file.c - operations for regular (text) files.
  *
  * Based on sysfs:
diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c
index 42c348bb2903..eb5ec3e46283 100644
--- a/fs/configfs/inode.c
+++ b/fs/configfs/inode.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * inode.c - basic inode and dentry operations.
  *
  * Based on sysfs:
diff --git a/fs/configfs/item.c b/fs/configfs/item.c
index 704a4356f137..254170a82aa3 100644
--- a/fs/configfs/item.c
+++ b/fs/configfs/item.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * item.c - library routines for handling generic config items
  *
  * Based on kobject:
diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index 0c6e8cf61953..c2d820063ec4 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * mount.c - operations for initializing and mounting configfs.
  *
  * Based on sysfs:
diff --git a/fs/configfs/symlink.c b/fs/configfs/symlink.c
index 77c854364e60..0623c3edcfb9 100644
--- a/fs/configfs/symlink.c
+++ b/fs/configfs/symlink.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * symlink.c - operations for configfs symlinks.
  *
  * Based on sysfs:
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index fc4f490f2d78..3d8e3698d3df 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -3004,10 +3004,3 @@ out_notsup:
 	goto out;
 }
 EXPORT_SYMBOL_GPL(nfs_permission);
-
-/*
- * Local variables:
- *  version-control: t
- *  kept-new-versions: 5
- * End:
- */
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index c65c4b41e2c1..545010d6cbf3 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -10427,9 +10427,3 @@ const struct xattr_handler *nfs4_xattr_handlers[] = {
 #endif
 	NULL
 };
-
-/*
- * Local variables:
- *  c-basic-offset: 8
- * End:
- */
diff --git a/fs/nfs/nfs4renewd.c b/fs/nfs/nfs4renewd.c
index ff876dda7f06..db3811af0796 100644
--- a/fs/nfs/nfs4renewd.c
+++ b/fs/nfs/nfs4renewd.c
@@ -149,9 +149,3 @@ void nfs4_set_lease_period(struct nfs_client *clp,
 	/* Cap maximum reconnect timeout at 1/2 lease period */
 	rpc_set_connect_timeout(clp->cl_rpcclient, lease, lease >> 1);
 }
-
-/*
- * Local variables:
- *   c-basic-offset: 8
- * End:
- */
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 3a51351bdc6a..2eec5bbb55c8 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -2695,9 +2695,3 @@ static int nfs4_run_state_manager(void *ptr)
 	module_put_and_exit(0);
 	return 0;
 }
-
-/*
- * Local variables:
- *  c-basic-offset: 8
- * End:
- */
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index ac6b79ee9355..d4fd3be0e8ca 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -7629,9 +7629,3 @@ const struct rpc_version nfs_version4 = {
 	.procs			= nfs4_procedures,
 	.counts			= nfs_version4_counts,
 };
-
-/*
- * Local variables:
- *  c-basic-offset: 8
- * End:
- */
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index daf43b980d4b..f4ce93d7f26e 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -3317,9 +3317,3 @@ const struct svc_version nfsd_version4 = {
 	.vs_rpcb_optnl		= true,
 	.vs_need_cong_ctrl	= true,
 };
-
-/*
- * Local variables:
- *  c-basic-offset: 8
- * End:
- */
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index e0f06d3cbd44..7abeccb975b2 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -5448,9 +5448,3 @@ nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
 	nfsd4_sequence_done(resp);
 	return 1;
 }
-
-/*
- * Local variables:
- *  c-basic-offset: 8
- * End:
- */
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index fe540a3415c6..a7c425254fee 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -866,9 +866,3 @@ struct nfsd4_operation {
 
 
 #endif
-
-/*
- * Local variables:
- *  c-basic-offset: 8
- * End:
- */
diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c
index 5259badabb56..5c72a7e6d6c5 100644
--- a/fs/ocfs2/acl.c
+++ b/fs/ocfs2/acl.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * acl.c
  *
  * Copyright (C) 2004, 2008 Oracle.  All rights reserved.
diff --git a/fs/ocfs2/acl.h b/fs/ocfs2/acl.h
index 4e86450917b2..f59d8d0a61fa 100644
--- a/fs/ocfs2/acl.h
+++ b/fs/ocfs2/acl.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * acl.h
  *
  * Copyright (C) 2004, 2008 Oracle.  All rights reserved.
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index 78710788c237..e032f2e2c2c5 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * alloc.c
  *
  * Extent allocs and frees
diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h
index 7f973dd76dbc..4af7abaa6e40 100644
--- a/fs/ocfs2/alloc.h
+++ b/fs/ocfs2/alloc.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * alloc.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index ad20403b383f..1294925ac94a 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
  */
 
diff --git a/fs/ocfs2/aops.h b/fs/ocfs2/aops.h
index 70ed4382750d..3a520117fa59 100644
--- a/fs/ocfs2/aops.h
+++ b/fs/ocfs2/aops.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * Copyright (C) 2002, 2004, 2005 Oracle.  All rights reserved.
  */
 
diff --git a/fs/ocfs2/blockcheck.c b/fs/ocfs2/blockcheck.c
index dabfef9c2bc0..863a5316030b 100644
--- a/fs/ocfs2/blockcheck.c
+++ b/fs/ocfs2/blockcheck.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * blockcheck.c
  *
  * Checksum and ECC codes for the OCFS2 userspace library.
diff --git a/fs/ocfs2/blockcheck.h b/fs/ocfs2/blockcheck.h
index 8f17d2c85f40..d0578e98ee8d 100644
--- a/fs/ocfs2/blockcheck.h
+++ b/fs/ocfs2/blockcheck.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * blockcheck.h
  *
  * Checksum and ECC codes for the OCFS2 userspace library.
diff --git a/fs/ocfs2/buffer_head_io.c b/fs/ocfs2/buffer_head_io.c
index f0b104e483d8..e7758778abef 100644
--- a/fs/ocfs2/buffer_head_io.c
+++ b/fs/ocfs2/buffer_head_io.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * io.c
  *
  * Buffer cache handling
diff --git a/fs/ocfs2/buffer_head_io.h b/fs/ocfs2/buffer_head_io.h
index 1c5e533fba04..2d51649fc090 100644
--- a/fs/ocfs2/buffer_head_io.h
+++ b/fs/ocfs2/buffer_head_io.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * ocfs2_buffer_head.h
  *
  * Buffer cache handling functions defined
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 12a7590601dd..e829c2595543 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * Copyright (C) 2004, 2005 Oracle.  All rights reserved.
  */
 
diff --git a/fs/ocfs2/cluster/heartbeat.h b/fs/ocfs2/cluster/heartbeat.h
index beed31ea86cf..1d4100abf6f8 100644
--- a/fs/ocfs2/cluster/heartbeat.h
+++ b/fs/ocfs2/cluster/heartbeat.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * heartbeat.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/cluster/masklog.c b/fs/ocfs2/cluster/masklog.c
index 1d696c96b8b2..810d32815593 100644
--- a/fs/ocfs2/cluster/masklog.c
+++ b/fs/ocfs2/cluster/masklog.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * Copyright (C) 2004, 2005 Oracle.  All rights reserved.
  */
 
diff --git a/fs/ocfs2/cluster/masklog.h b/fs/ocfs2/cluster/masklog.h
index 446e452ac7a6..b73fc42e46ff 100644
--- a/fs/ocfs2/cluster/masklog.h
+++ b/fs/ocfs2/cluster/masklog.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * Copyright (C) 2005 Oracle.  All rights reserved.
  */
 
diff --git a/fs/ocfs2/cluster/netdebug.c b/fs/ocfs2/cluster/netdebug.c
index 667a5c5e1f66..7524994e3199 100644
--- a/fs/ocfs2/cluster/netdebug.c
+++ b/fs/ocfs2/cluster/netdebug.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * netdebug.c
  *
  * debug functionality for o2net
diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c
index 7a7640c59f3c..bb82e6b1ff4e 100644
--- a/fs/ocfs2/cluster/nodemanager.c
+++ b/fs/ocfs2/cluster/nodemanager.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * Copyright (C) 2004, 2005 Oracle.  All rights reserved.
  */
 
diff --git a/fs/ocfs2/cluster/nodemanager.h b/fs/ocfs2/cluster/nodemanager.h
index 3e0006631cc4..3490e77a952d 100644
--- a/fs/ocfs2/cluster/nodemanager.h
+++ b/fs/ocfs2/cluster/nodemanager.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * nodemanager.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/cluster/ocfs2_heartbeat.h b/fs/ocfs2/cluster/ocfs2_heartbeat.h
index 760d850be11e..6088c9f974dd 100644
--- a/fs/ocfs2/cluster/ocfs2_heartbeat.h
+++ b/fs/ocfs2/cluster/ocfs2_heartbeat.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * ocfs2_heartbeat.h
  *
  * On-disk structures for ocfs2_heartbeat
diff --git a/fs/ocfs2/cluster/ocfs2_nodemanager.h b/fs/ocfs2/cluster/ocfs2_nodemanager.h
index 21ad307419a8..c9a0b77443e7 100644
--- a/fs/ocfs2/cluster/ocfs2_nodemanager.h
+++ b/fs/ocfs2/cluster/ocfs2_nodemanager.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * ocfs2_nodemanager.h
  *
  * Header describing the interface between userspace and the kernel
diff --git a/fs/ocfs2/cluster/quorum.c b/fs/ocfs2/cluster/quorum.c
index cea739be77c4..189c111bc371 100644
--- a/fs/ocfs2/cluster/quorum.c
+++ b/fs/ocfs2/cluster/quorum.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- *
- * vim: noexpandtab sw=8 ts=8 sts=0:
+/*
  *
  * Copyright (C) 2005 Oracle.  All rights reserved.
  */
diff --git a/fs/ocfs2/cluster/quorum.h b/fs/ocfs2/cluster/quorum.h
index 6d45ce8b18a1..d64bf4482a4a 100644
--- a/fs/ocfs2/cluster/quorum.h
+++ b/fs/ocfs2/cluster/quorum.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * Copyright (C) 2005 Oracle.  All rights reserved.
  */
 
diff --git a/fs/ocfs2/cluster/sys.c b/fs/ocfs2/cluster/sys.c
index d6067c3d84c1..022f716c74ff 100644
--- a/fs/ocfs2/cluster/sys.c
+++ b/fs/ocfs2/cluster/sys.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * sys.c
  *
  * OCFS2 cluster sysfs interface
diff --git a/fs/ocfs2/cluster/sys.h b/fs/ocfs2/cluster/sys.h
index ce380517cf17..70aaba65317e 100644
--- a/fs/ocfs2/cluster/sys.h
+++ b/fs/ocfs2/cluster/sys.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * sys.h
  *
  * Function prototypes for o2cb sysfs interface
diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c
index 3bd8119bed5e..f660c0dbdb63 100644
--- a/fs/ocfs2/cluster/tcp.c
+++ b/fs/ocfs2/cluster/tcp.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- *
- * vim: noexpandtab sw=8 ts=8 sts=0:
+/*
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
  *
diff --git a/fs/ocfs2/cluster/tcp.h b/fs/ocfs2/cluster/tcp.h
index 736338f45c59..a75b551d31c7 100644
--- a/fs/ocfs2/cluster/tcp.h
+++ b/fs/ocfs2/cluster/tcp.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * tcp.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/cluster/tcp_internal.h b/fs/ocfs2/cluster/tcp_internal.h
index e6a2b9dfcd16..601c99bd2611 100644
--- a/fs/ocfs2/cluster/tcp_internal.h
+++ b/fs/ocfs2/cluster/tcp_internal.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * Copyright (C) 2005 Oracle.  All rights reserved.
  */
 
diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c
index 42a61eecdacd..04fc8344063a 100644
--- a/fs/ocfs2/dcache.c
+++ b/fs/ocfs2/dcache.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dcache.c
  *
  * dentry cache handling code
diff --git a/fs/ocfs2/dcache.h b/fs/ocfs2/dcache.h
index 3686a52ba143..7f246c5692d8 100644
--- a/fs/ocfs2/dcache.h
+++ b/fs/ocfs2/dcache.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dcache.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index bdfba9db558a..bd8d534f11cb 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dir.c
  *
  * Creates, reads, walks and deletes directory-nodes
diff --git a/fs/ocfs2/dir.h b/fs/ocfs2/dir.h
index e3e7d5dd29e8..4b9f5a12c7d2 100644
--- a/fs/ocfs2/dir.h
+++ b/fs/ocfs2/dir.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dir.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/dlm/dlmapi.h b/fs/ocfs2/dlm/dlmapi.h
index 6456c0fbcbb2..bae60ca2672a 100644
--- a/fs/ocfs2/dlm/dlmapi.h
+++ b/fs/ocfs2/dlm/dlmapi.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmapi.h
  *
  * externally exported dlm interfaces
diff --git a/fs/ocfs2/dlm/dlmast.c b/fs/ocfs2/dlm/dlmast.c
index 70a10764f249..c681ba957932 100644
--- a/fs/ocfs2/dlm/dlmast.c
+++ b/fs/ocfs2/dlm/dlmast.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmast.c
  *
  * AST and BAST functionality for local and remote nodes
diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h
index 58d57e25d384..fd2022712167 100644
--- a/fs/ocfs2/dlm/dlmcommon.h
+++ b/fs/ocfs2/dlm/dlmcommon.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmcommon.h
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
diff --git a/fs/ocfs2/dlm/dlmconvert.c b/fs/ocfs2/dlm/dlmconvert.c
index 6051edc33aef..450d46eefab3 100644
--- a/fs/ocfs2/dlm/dlmconvert.c
+++ b/fs/ocfs2/dlm/dlmconvert.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmconvert.c
  *
  * underlying calls for lock conversion
diff --git a/fs/ocfs2/dlm/dlmconvert.h b/fs/ocfs2/dlm/dlmconvert.h
index 12d9c28bc52f..1f371716513b 100644
--- a/fs/ocfs2/dlm/dlmconvert.h
+++ b/fs/ocfs2/dlm/dlmconvert.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmconvert.h
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
diff --git a/fs/ocfs2/dlm/dlmdebug.c b/fs/ocfs2/dlm/dlmdebug.c
index 4b8b41d23e91..d442cf5dda8a 100644
--- a/fs/ocfs2/dlm/dlmdebug.c
+++ b/fs/ocfs2/dlm/dlmdebug.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmdebug.c
  *
  * debug functionality for the dlm
diff --git a/fs/ocfs2/dlm/dlmdebug.h b/fs/ocfs2/dlm/dlmdebug.h
index f8fd8680a4b6..e08f7357e7ec 100644
--- a/fs/ocfs2/dlm/dlmdebug.h
+++ b/fs/ocfs2/dlm/dlmdebug.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmdebug.h
  *
  * Copyright (C) 2008 Oracle.  All rights reserved.
diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index 357cfc702ce3..9f90fc9551e1 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmdomain.c
  *
  * defines domain join / leave apis
diff --git a/fs/ocfs2/dlm/dlmdomain.h b/fs/ocfs2/dlm/dlmdomain.h
index 7c21664d23d0..815abe30ad09 100644
--- a/fs/ocfs2/dlm/dlmdomain.h
+++ b/fs/ocfs2/dlm/dlmdomain.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmdomain.h
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
diff --git a/fs/ocfs2/dlm/dlmlock.c b/fs/ocfs2/dlm/dlmlock.c
index 83f0760e4fba..041fd1791ae7 100644
--- a/fs/ocfs2/dlm/dlmlock.c
+++ b/fs/ocfs2/dlm/dlmlock.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmlock.c
  *
  * underlying calls for lock creation
diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index f105746063ed..4960a6de768d 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmmod.c
  *
  * standalone DLM module
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index afc51736686c..0e7aad1b11cc 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmrecovery.c
  *
  * recovery stuff
diff --git a/fs/ocfs2/dlm/dlmthread.c b/fs/ocfs2/dlm/dlmthread.c
index 5ccc4ff0b82a..c350bd4df770 100644
--- a/fs/ocfs2/dlm/dlmthread.c
+++ b/fs/ocfs2/dlm/dlmthread.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmthread.c
  *
  * standalone DLM module
diff --git a/fs/ocfs2/dlm/dlmunlock.c b/fs/ocfs2/dlm/dlmunlock.c
index dcb17ca8ae74..61103b2d69fb 100644
--- a/fs/ocfs2/dlm/dlmunlock.c
+++ b/fs/ocfs2/dlm/dlmunlock.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmunlock.c
  *
  * underlying calls for unlocking locks
diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c
index b2870f1a31df..fa0a14f199eb 100644
--- a/fs/ocfs2/dlmfs/dlmfs.c
+++ b/fs/ocfs2/dlmfs/dlmfs.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmfs.c
  *
  * Code which implements the kernel side of a minimal userspace
diff --git a/fs/ocfs2/dlmfs/userdlm.c b/fs/ocfs2/dlmfs/userdlm.c
index 339f098d9592..29f183a15798 100644
--- a/fs/ocfs2/dlmfs/userdlm.c
+++ b/fs/ocfs2/dlmfs/userdlm.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * userdlm.c
  *
  * Code which implements the kernel side of a minimal userspace
diff --git a/fs/ocfs2/dlmfs/userdlm.h b/fs/ocfs2/dlmfs/userdlm.h
index 0558ae768200..47ba18eac423 100644
--- a/fs/ocfs2/dlmfs/userdlm.h
+++ b/fs/ocfs2/dlmfs/userdlm.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * userdlm.h
  *
  * Userspace dlm defines
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 0fbe8bf7190f..48fd369c29a4 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmglue.c
  *
  * Code which implements an OCFS2 specific interface to our DLM.
diff --git a/fs/ocfs2/dlmglue.h b/fs/ocfs2/dlmglue.h
index b8fbed25df89..e5da5809ed95 100644
--- a/fs/ocfs2/dlmglue.h
+++ b/fs/ocfs2/dlmglue.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * dlmglue.h
  *
  * description here
diff --git a/fs/ocfs2/export.c b/fs/ocfs2/export.c
index 69ed278dd84d..eaa8c80ace3c 100644
--- a/fs/ocfs2/export.c
+++ b/fs/ocfs2/export.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * export.c
  *
  * Functions to facilitate NFS exporting
diff --git a/fs/ocfs2/export.h b/fs/ocfs2/export.h
index d485da0c3439..636357400505 100644
--- a/fs/ocfs2/export.h
+++ b/fs/ocfs2/export.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * export.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c
index 7b93e9c766f6..70a768b623cf 100644
--- a/fs/ocfs2/extent_map.c
+++ b/fs/ocfs2/extent_map.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * extent_map.c
  *
  * Block/Cluster mapping functions
diff --git a/fs/ocfs2/extent_map.h b/fs/ocfs2/extent_map.h
index e5464f6cee8a..bc4ed59fb925 100644
--- a/fs/ocfs2/extent_map.h
+++ b/fs/ocfs2/extent_map.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * extent_map.h
  *
  * In-memory file extent mappings for OCFS2.
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index db8a6265b749..f17c3d33fb18 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * file.c
  *
  * File open, close, extend, truncate
diff --git a/fs/ocfs2/file.h b/fs/ocfs2/file.h
index 8536cec5f122..71db8f3aa027 100644
--- a/fs/ocfs2/file.h
+++ b/fs/ocfs2/file.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * file.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/filecheck.c b/fs/ocfs2/filecheck.c
index 50f11bfdc8c2..90b8d300c1ee 100644
--- a/fs/ocfs2/filecheck.c
+++ b/fs/ocfs2/filecheck.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * filecheck.c
  *
  * Code which implements online file check.
diff --git a/fs/ocfs2/filecheck.h b/fs/ocfs2/filecheck.h
index 4d006777ac54..d3bcb8bcfeb0 100644
--- a/fs/ocfs2/filecheck.h
+++ b/fs/ocfs2/filecheck.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * filecheck.h
  *
  * Online file check.
diff --git a/fs/ocfs2/heartbeat.c b/fs/ocfs2/heartbeat.c
index 60c5f995d30c..9099d8fc7599 100644
--- a/fs/ocfs2/heartbeat.c
+++ b/fs/ocfs2/heartbeat.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * heartbeat.c
  *
  * Register ourselves with the heartbaet service, keep our node maps
diff --git a/fs/ocfs2/heartbeat.h b/fs/ocfs2/heartbeat.h
index 5fedb2d35dc0..f1f8b1802fe4 100644
--- a/fs/ocfs2/heartbeat.h
+++ b/fs/ocfs2/heartbeat.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * heartbeat.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index 7c9dfd50c1c1..bc8f32fab964 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * inode.c
  *
  * vfs' aops, fops, dops and iops
diff --git a/fs/ocfs2/inode.h b/fs/ocfs2/inode.h
index 51a4f7197987..82b28fdacc7e 100644
--- a/fs/ocfs2/inode.h
+++ b/fs/ocfs2/inode.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * inode.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index db52e843002a..4e589ce2fce6 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * journal.c
  *
  * Defines functions of journalling api
diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h
index bfe611ed1b1d..d158acb8b38a 100644
--- a/fs/ocfs2/journal.h
+++ b/fs/ocfs2/journal.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * journal.h
  *
  * Defines journalling api and structures.
diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
index fc8252a28cb1..5f6bacbeef6b 100644
--- a/fs/ocfs2/localalloc.c
+++ b/fs/ocfs2/localalloc.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * localalloc.c
  *
  * Node local data allocation
diff --git a/fs/ocfs2/localalloc.h b/fs/ocfs2/localalloc.h
index e8a5cea48639..08f925b7ec6d 100644
--- a/fs/ocfs2/localalloc.h
+++ b/fs/ocfs2/localalloc.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * localalloc.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/locks.c b/fs/ocfs2/locks.c
index 7edc4e5c7c2c..fab7c6a4a7d0 100644
--- a/fs/ocfs2/locks.c
+++ b/fs/ocfs2/locks.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * locks.c
  *
  * Userspace file locking support
diff --git a/fs/ocfs2/locks.h b/fs/ocfs2/locks.h
index 389fe1fce3a5..b52de3947d5f 100644
--- a/fs/ocfs2/locks.h
+++ b/fs/ocfs2/locks.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * locks.h
  *
  * Function prototypes for Userspace file locking support
diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c
index 25cabbfe87fc..1834f26522ed 100644
--- a/fs/ocfs2/mmap.c
+++ b/fs/ocfs2/mmap.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * mmap.c
  *
  * Code to deal with the mess that is clustered mmap.
diff --git a/fs/ocfs2/move_extents.c b/fs/ocfs2/move_extents.c
index 758d9661ef1e..192cad0662d8 100644
--- a/fs/ocfs2/move_extents.c
+++ b/fs/ocfs2/move_extents.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * move_extents.c
  *
  * Copyright (C) 2011 Oracle.  All rights reserved.
diff --git a/fs/ocfs2/move_extents.h b/fs/ocfs2/move_extents.h
index 28cac43892c5..987f9e559f30 100644
--- a/fs/ocfs2/move_extents.h
+++ b/fs/ocfs2/move_extents.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * move_extents.h
  *
  * Copyright (C) 2011 Oracle.  All rights reserved.
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 05ced86580d1..2c46ff6ba4ea 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * namei.c
  *
  * Create and rename file, directory, symlinks
diff --git a/fs/ocfs2/namei.h b/fs/ocfs2/namei.h
index cc091ed02b4a..9cc891eb874e 100644
--- a/fs/ocfs2/namei.h
+++ b/fs/ocfs2/namei.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * namei.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/ocfs1_fs_compat.h b/fs/ocfs2/ocfs1_fs_compat.h
index 01ae48c4834d..6dbcf3d467fb 100644
--- a/fs/ocfs2/ocfs1_fs_compat.h
+++ b/fs/ocfs2/ocfs1_fs_compat.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * ocfs1_fs_compat.h
  *
  * OCFS1 volume header definitions.  OCFS2 creates valid but unmountable
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 7993d527edae..bb62cc2e0211 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * ocfs2.h
  *
  * Defines macros and structures used in OCFS2
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index 19137c6d087b..638d875eccc7 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * ocfs2_fs.h
  *
  * On-disk structures for OCFS2.
diff --git a/fs/ocfs2/ocfs2_ioctl.h b/fs/ocfs2/ocfs2_ioctl.h
index 273616bd4f19..9680797bc531 100644
--- a/fs/ocfs2/ocfs2_ioctl.h
+++ b/fs/ocfs2/ocfs2_ioctl.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * ocfs2_ioctl.h
  *
  * Defines OCFS2 ioctls.
diff --git a/fs/ocfs2/ocfs2_lockid.h b/fs/ocfs2/ocfs2_lockid.h
index b4be84956bc1..8ac357ce6a30 100644
--- a/fs/ocfs2/ocfs2_lockid.h
+++ b/fs/ocfs2/ocfs2_lockid.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * ocfs2_lockid.h
  *
  * Defines OCFS2 lockid bits.
diff --git a/fs/ocfs2/ocfs2_lockingver.h b/fs/ocfs2/ocfs2_lockingver.h
index 5c9c105b33ee..31a5e1619e7f 100644
--- a/fs/ocfs2/ocfs2_lockingver.h
+++ b/fs/ocfs2/ocfs2_lockingver.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * ocfs2_lockingver.h
  *
  * Defines OCFS2 Locking version values.
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index c19a463fac55..7f6355cbb587 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * refcounttree.c
  *
  * Copyright (C) 2009 Oracle.  All rights reserved.
diff --git a/fs/ocfs2/refcounttree.h b/fs/ocfs2/refcounttree.h
index 0b9014495726..8197a94feec0 100644
--- a/fs/ocfs2/refcounttree.h
+++ b/fs/ocfs2/refcounttree.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * refcounttree.h
  *
  * Copyright (C) 2009 Oracle.  All rights reserved.
diff --git a/fs/ocfs2/reservations.c b/fs/ocfs2/reservations.c
index bf3842e34fb9..769e466887b0 100644
--- a/fs/ocfs2/reservations.c
+++ b/fs/ocfs2/reservations.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * reservations.c
  *
  * Allocation reservations implementation
diff --git a/fs/ocfs2/reservations.h b/fs/ocfs2/reservations.h
index 6ac88122896d..677c50663595 100644
--- a/fs/ocfs2/reservations.h
+++ b/fs/ocfs2/reservations.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * reservations.h
  *
  * Allocation reservations function prototypes and structures.
diff --git a/fs/ocfs2/resize.c b/fs/ocfs2/resize.c
index 24eb52f9059c..d65d43c61857 100644
--- a/fs/ocfs2/resize.c
+++ b/fs/ocfs2/resize.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * resize.c
  *
  * volume resize.
diff --git a/fs/ocfs2/resize.h b/fs/ocfs2/resize.h
index 0af0c023042c..4990637219ef 100644
--- a/fs/ocfs2/resize.h
+++ b/fs/ocfs2/resize.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * resize.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/slot_map.c b/fs/ocfs2/slot_map.c
index 4da0e4b1e79b..0b0ae3ebb0cf 100644
--- a/fs/ocfs2/slot_map.c
+++ b/fs/ocfs2/slot_map.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * slot_map.c
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
diff --git a/fs/ocfs2/slot_map.h b/fs/ocfs2/slot_map.h
index 93b53e73f0f7..a43644570b53 100644
--- a/fs/ocfs2/slot_map.h
+++ b/fs/ocfs2/slot_map.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * slotmap.h
  *
  * description here
diff --git a/fs/ocfs2/stack_o2cb.c b/fs/ocfs2/stack_o2cb.c
index f70012038383..88f75f7f02d7 100644
--- a/fs/ocfs2/stack_o2cb.c
+++ b/fs/ocfs2/stack_o2cb.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * stack_o2cb.c
  *
  * Code which interfaces ocfs2 with the o2cb stack.
diff --git a/fs/ocfs2/stack_user.c b/fs/ocfs2/stack_user.c
index 7397064c3f35..85a47621e0c0 100644
--- a/fs/ocfs2/stack_user.c
+++ b/fs/ocfs2/stack_user.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * stack_user.c
  *
  * Code which interfaces ocfs2 with fs/dlm and a userspace stack.
diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c
index 8d33ebc6b6fc..d50e8b8dfea4 100644
--- a/fs/ocfs2/stackglue.c
+++ b/fs/ocfs2/stackglue.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * stackglue.c
  *
  * Code which implements an OCFS2 specific interface to underlying
diff --git a/fs/ocfs2/stackglue.h b/fs/ocfs2/stackglue.h
index e9d26cbeb3b8..3636847fae19 100644
--- a/fs/ocfs2/stackglue.h
+++ b/fs/ocfs2/stackglue.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * stackglue.h
  *
  * Glue to the underlying cluster stack.
diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c
index 8c8cf7f4eb34..8521942f5af2 100644
--- a/fs/ocfs2/suballoc.c
+++ b/fs/ocfs2/suballoc.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * suballoc.c
  *
  * metadata alloc and free
diff --git a/fs/ocfs2/suballoc.h b/fs/ocfs2/suballoc.h
index 50b36250beb6..5805a03d100b 100644
--- a/fs/ocfs2/suballoc.h
+++ b/fs/ocfs2/suballoc.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * suballoc.h
  *
  * Defines sub allocator api
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 079f8826993e..c86bd4e60e20 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * super.c
  *
  * load/unload driver, mount/dismount volumes
diff --git a/fs/ocfs2/super.h b/fs/ocfs2/super.h
index 76facaf63336..8312651135b9 100644
--- a/fs/ocfs2/super.h
+++ b/fs/ocfs2/super.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * super.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/symlink.c b/fs/ocfs2/symlink.c
index 94cfacc9bad7..f755a4985821 100644
--- a/fs/ocfs2/symlink.c
+++ b/fs/ocfs2/symlink.c
@@ -1,6 +1,4 @@
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  *  linux/cluster/ssi/cfs/symlink.c
  *
  *	This program is free software; you can redistribute it and/or
diff --git a/fs/ocfs2/symlink.h b/fs/ocfs2/symlink.h
index 167094d1e5aa..ffcf0210545c 100644
--- a/fs/ocfs2/symlink.h
+++ b/fs/ocfs2/symlink.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * symlink.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/sysfile.c b/fs/ocfs2/sysfile.c
index bb701c4e449f..53a945da873b 100644
--- a/fs/ocfs2/sysfile.c
+++ b/fs/ocfs2/sysfile.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * sysfile.c
  *
  * Initialize, read, write, etc. system files.
diff --git a/fs/ocfs2/sysfile.h b/fs/ocfs2/sysfile.h
index a83dd962fccb..2b38c75990fd 100644
--- a/fs/ocfs2/sysfile.h
+++ b/fs/ocfs2/sysfile.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * sysfile.h
  *
  * Function prototypes
diff --git a/fs/ocfs2/uptodate.c b/fs/ocfs2/uptodate.c
index 580852ba05c4..09854925fa5c 100644
--- a/fs/ocfs2/uptodate.c
+++ b/fs/ocfs2/uptodate.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * uptodate.c
  *
  * Tracking the up-to-date-ness of a local buffer_head with respect to
diff --git a/fs/ocfs2/uptodate.h b/fs/ocfs2/uptodate.h
index 77a30cae4879..85d94134001b 100644
--- a/fs/ocfs2/uptodate.h
+++ b/fs/ocfs2/uptodate.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * uptodate.h
  *
  * Cluster uptodate tracking
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 36ae47a4aef6..dd784eb0cd7c 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * xattr.c
  *
  * Copyright (C) 2004, 2008 Oracle.  All rights reserved.
diff --git a/fs/ocfs2/xattr.h b/fs/ocfs2/xattr.h
index 9c80382da1f5..00308b57f64f 100644
--- a/fs/ocfs2/xattr.h
+++ b/fs/ocfs2/xattr.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * xattr.h
  *
  * Copyright (C) 2004, 2008 Oracle.  All rights reserved.
diff --git a/fs/reiserfs/procfs.c b/fs/reiserfs/procfs.c
index 155b82870333..4a7cb16e9345 100644
--- a/fs/reiserfs/procfs.c
+++ b/fs/reiserfs/procfs.c
@@ -488,13 +488,3 @@ int reiserfs_proc_info_global_done(void)
  * (available at http://www.namesys.com/legalese.html)
  *
  */
-
-/*
- * Make Linus happy.
- * Local variables:
- * c-indentation-style: "K&R"
- * mode-name: "LC"
- * c-basic-offset: 8
- * tab-width: 8
- * End:
- */
diff --git a/include/linux/configfs.h b/include/linux/configfs.h
index 2e8c69b43c64..97cfd13bae51 100644
--- a/include/linux/configfs.h
+++ b/include/linux/configfs.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/*
  * configfs.h - definitions for the device driver filesystem
  *
  * Based on sysfs:
diff --git a/include/linux/genl_magic_func.h b/include/linux/genl_magic_func.h
index 6cb82301d8e9..939b1a8f571b 100644
--- a/include/linux/genl_magic_func.h
+++ b/include/linux/genl_magic_func.h
@@ -404,4 +404,3 @@ s_fields								\
 
 /* }}}1 */
 #endif /* GENL_MAGIC_FUNC_H */
-/* vim: set foldmethod=marker foldlevel=1 nofoldenable : */
diff --git a/include/linux/genl_magic_struct.h b/include/linux/genl_magic_struct.h
index 35d21fddaf2d..f81d48987528 100644
--- a/include/linux/genl_magic_struct.h
+++ b/include/linux/genl_magic_struct.h
@@ -283,4 +283,3 @@ enum {									\
 
 /* }}}1 */
 #endif /* GENL_MAGIC_STRUCT_H */
-/* vim: set foldmethod=marker nofoldenable : */
diff --git a/include/uapi/linux/if_bonding.h b/include/uapi/linux/if_bonding.h
index e8eb4ad03cf1..d174914a837d 100644
--- a/include/uapi/linux/if_bonding.h
+++ b/include/uapi/linux/if_bonding.h
@@ -153,14 +153,3 @@ enum {
 #define BOND_3AD_STAT_MAX (__BOND_3AD_STAT_MAX - 1)
 
 #endif /* _LINUX_IF_BONDING_H */
-
-/*
- * Local variables:
- *  version-control: t
- *  kept-new-versions: 5
- *  c-indent-level: 8
- *  c-basic-offset: 8
- *  tab-width: 8
- * End:
- */
-
diff --git a/include/uapi/linux/nfs4.h b/include/uapi/linux/nfs4.h
index ed5415e0f1c1..800bb0ffa6e6 100644
--- a/include/uapi/linux/nfs4.h
+++ b/include/uapi/linux/nfs4.h
@@ -178,9 +178,3 @@
 #define NFS4_MAX_BACK_CHANNEL_OPS 2
 
 #endif /* _UAPI_LINUX_NFS4_H */
-
-/*
- * Local variables:
- *  c-basic-offset: 8
- * End:
- */
diff --git a/include/xen/interface/elfnote.h b/include/xen/interface/elfnote.h
index 9e9f9bf7c66d..449bd383cb76 100644
--- a/include/xen/interface/elfnote.h
+++ b/include/xen/interface/elfnote.h
@@ -208,13 +208,3 @@
 #define XEN_ELFNOTE_MAX XEN_ELFNOTE_PHYS32_ENTRY
 
 #endif /* __XEN_PUBLIC_ELFNOTE_H__ */
-
-/*
- * Local variables:
- * mode: C
- * c-set-style: "BSD"
- * c-basic-offset: 4
- * tab-width: 4
- * indent-tabs-mode: nil
- * End:
- */
diff --git a/include/xen/interface/hvm/hvm_vcpu.h b/include/xen/interface/hvm/hvm_vcpu.h
index 32ca83edd44d..bfc2138e0bf5 100644
--- a/include/xen/interface/hvm/hvm_vcpu.h
+++ b/include/xen/interface/hvm/hvm_vcpu.h
@@ -131,13 +131,3 @@ struct vcpu_hvm_context {
 typedef struct vcpu_hvm_context vcpu_hvm_context_t;
 
 #endif /* __XEN_PUBLIC_HVM_HVM_VCPU_H__ */
-
-/*
- * Local variables:
- * mode: C
- * c-file-style: "BSD"
- * c-basic-offset: 4
- * tab-width: 4
- * indent-tabs-mode: nil
- * End:
- */
diff --git a/include/xen/interface/io/xenbus.h b/include/xen/interface/io/xenbus.h
index aaf2951b1cce..fb8716112251 100644
--- a/include/xen/interface/io/xenbus.h
+++ b/include/xen/interface/io/xenbus.h
@@ -39,13 +39,3 @@ enum xenbus_state
 };
 
 #endif /* _XEN_PUBLIC_IO_XENBUS_H */
-
-/*
- * Local variables:
- *  c-file-style: "linux"
- *  indent-tabs-mode: t
- *  c-indent-level: 8
- *  c-basic-offset: 8
- *  tab-width: 8
- * End:
- */
diff --git a/samples/configfs/configfs_sample.c b/samples/configfs/configfs_sample.c
index f9008be7a8a1..37a657b25d58 100644
--- a/samples/configfs/configfs_sample.c
+++ b/samples/configfs/configfs_sample.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
- * vim: noexpandtab ts=8 sts=0 sw=8:
- *
  * configfs_example_macros.c - This file is a demonstration module
  *      containing a number of configfs subsystems.  It uses the helper
  *      macros defined by configfs.h
diff --git a/tools/usb/hcd-tests.sh b/tools/usb/hcd-tests.sh
index e8cad6a4f9c9..73f914d13f5c 100644
--- a/tools/usb/hcd-tests.sh
+++ b/tools/usb/hcd-tests.sh
@@ -272,5 +272,3 @@ do
 	echo ''
     done
 done
-
-# vim: sw=4
-- 
cgit v1.2.3