1 files changed, 94 insertions, 10 deletions

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index f1c57cd33b5b..9ba7671b84f8 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -51,8 +51,6 @@
 #define CREATE_TRACE_POINTS
 #include <trace/events/ufs.h>
 
-#define UFSHCD_REQ_SENSE_SIZE	18
-
 #define UFSHCD_ENABLE_INTRS	(UTP_TRANSFER_REQ_COMPL |\
 				 UTP_TASK_REQ_COMPL |\
 				 UFSHCD_ERROR_MASK)
@@ -1551,6 +1549,7 @@ start:
 		 * currently running. Hence, fall through to cancel gating
 		 * work and to enable clocks.
 		 */
+		/* fallthrough */
 	case CLKS_OFF:
 		ufshcd_scsi_block_requests(hba);
 		hba->clk_gating.state = REQ_CLKS_ON;
@@ -1562,6 +1561,7 @@ start:
 		 * fall through to check if we should wait for this
 		 * work to be done or not.
 		 */
+		/* fallthrough */
 	case REQ_CLKS_ON:
 		if (async) {
 			rc = -EAGAIN;
@@ -1890,11 +1890,10 @@ static inline void ufshcd_copy_sense_data(struct ufshcd_lrb *lrbp)
 		int len_to_copy;
 
 		len = be16_to_cpu(lrbp->ucd_rsp_ptr->sr.sense_data_len);
-		len_to_copy = min_t(int, RESPONSE_UPIU_SENSE_DATA_LENGTH, len);
+		len_to_copy = min_t(int, UFS_SENSE_SIZE, len);
 
-		memcpy(lrbp->sense_buffer,
-			lrbp->ucd_rsp_ptr->sr.sense_data,
-			min_t(int, len_to_copy, UFSHCD_REQ_SENSE_SIZE));
+		memcpy(lrbp->sense_buffer, lrbp->ucd_rsp_ptr->sr.sense_data,
+		       len_to_copy);
 	}
 }
 
@@ -2456,7 +2455,7 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
 
 	WARN_ON(lrbp->cmd);
 	lrbp->cmd = cmd;
-	lrbp->sense_bufflen = UFSHCD_REQ_SENSE_SIZE;
+	lrbp->sense_bufflen = UFS_SENSE_SIZE;
 	lrbp->sense_buffer = cmd->sense_buffer;
 	lrbp->task_tag = tag;
 	lrbp->lun = ufshcd_scsi_to_upiu_lun(cmd->device->lun);
@@ -4620,6 +4619,7 @@ ufshcd_scsi_cmd_status(struct ufshcd_lrb *lrbp, int scsi_status)
 	switch (scsi_status) {
 	case SAM_STAT_CHECK_CONDITION:
 		ufshcd_copy_sense_data(lrbp);
+		/* fallthrough */
 	case SAM_STAT_GOOD:
 		result |= DID_OK << 16 |
 			  COMMAND_COMPLETE << 8 |
@@ -6701,6 +6701,74 @@ static void ufshcd_def_desc_sizes(struct ufs_hba *hba)
 	hba->desc_size.hlth_desc = QUERY_DESC_HEALTH_DEF_SIZE;
 }
 
+static struct ufs_ref_clk ufs_ref_clk_freqs[] = {
+	{19200000, REF_CLK_FREQ_19_2_MHZ},
+	{26000000, REF_CLK_FREQ_26_MHZ},
+	{38400000, REF_CLK_FREQ_38_4_MHZ},
+	{52000000, REF_CLK_FREQ_52_MHZ},
+	{0, REF_CLK_FREQ_INVAL},
+};
+
+static enum ufs_ref_clk_freq
+ufs_get_bref_clk_from_hz(unsigned long freq)
+{
+	int i;
+
+	for (i = 0; ufs_ref_clk_freqs[i].freq_hz; i++)
+		if (ufs_ref_clk_freqs[i].freq_hz == freq)
+			return ufs_ref_clk_freqs[i].val;
+
+	return REF_CLK_FREQ_INVAL;
+}
+
+void ufshcd_parse_dev_ref_clk_freq(struct ufs_hba *hba, struct clk *refclk)
+{
+	unsigned long freq;
+
+	freq = clk_get_rate(refclk);
+
+	hba->dev_ref_clk_freq =
+		ufs_get_bref_clk_from_hz(freq);
+
+	if (hba->dev_ref_clk_freq == REF_CLK_FREQ_INVAL)
+		dev_err(hba->dev,
+		"invalid ref_clk setting = %ld\n", freq);
+}
+
+static int ufshcd_set_dev_ref_clk(struct ufs_hba *hba)
+{
+	int err;
+	u32 ref_clk;
+	u32 freq = hba->dev_ref_clk_freq;
+
+	err = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR,
+			QUERY_ATTR_IDN_REF_CLK_FREQ, 0, 0, &ref_clk);
+
+	if (err) {
+		dev_err(hba->dev, "failed reading bRefClkFreq. err = %d\n",
+			err);
+		goto out;
+	}
+
+	if (ref_clk == freq)
+		goto out; /* nothing to update */
+
+	err = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
+			QUERY_ATTR_IDN_REF_CLK_FREQ, 0, 0, &freq);
+
+	if (err) {
+		dev_err(hba->dev, "bRefClkFreq setting to %lu Hz failed\n",
+			ufs_ref_clk_freqs[freq].freq_hz);
+		goto out;
+	}
+
+	dev_dbg(hba->dev, "bRefClkFreq setting to %lu Hz succeeded\n",
+			ufs_ref_clk_freqs[freq].freq_hz);
+
+out:
+	return err;
+}
+
 /**
  * ufshcd_probe_hba - probe hba to detect device and initialize
  * @hba: per-adapter instance
@@ -6766,6 +6834,12 @@ static int ufshcd_probe_hba(struct ufs_hba *hba)
 			"%s: Failed getting max supported power mode\n",
 			__func__);
 	} else {
+		/*
+		 * Set the right value to bRefClkFreq before attempting to
+		 * switch to HS gears.
+		 */
+		if (hba->dev_ref_clk_freq != REF_CLK_FREQ_INVAL)
+			ufshcd_set_dev_ref_clk(hba);
 		ret = ufshcd_config_pwr_mode(hba, &hba->max_pwr_info.info);
 		if (ret) {
 			dev_err(hba->dev, "%s: Failed setting power mode, err = %d\n",
@@ -6910,6 +6984,7 @@ static struct scsi_host_template ufshcd_driver_template = {
 	.max_host_blocked	= 1,
 	.track_queue_depth	= 1,
 	.sdev_groups		= ufshcd_driver_groups,
+	.dma_boundary		= PAGE_SIZE - 1,
 };
 
 static int ufshcd_config_vreg_load(struct device *dev, struct ufs_vreg *vreg,
@@ -7252,6 +7327,14 @@ static int ufshcd_init_clocks(struct ufs_hba *hba)
 			goto out;
 		}
 
+		/*
+		 * Parse device ref clk freq as per device tree "ref_clk".
+		 * Default dev_ref_clk_freq is set to REF_CLK_FREQ_INVAL
+		 * in ufshcd_alloc_host().
+		 */
+		if (!strcmp(clki->name, "ref_clk"))
+			ufshcd_parse_dev_ref_clk_freq(hba, clki->clk);
+
 		if (clki->max_freq) {
 			ret = clk_set_rate(clki->clk, clki->max_freq);
 			if (ret) {
@@ -7379,19 +7462,19 @@ ufshcd_send_request_sense(struct ufs_hba *hba, struct scsi_device *sdp)
 				0,
 				0,
 				0,
-				UFSHCD_REQ_SENSE_SIZE,
+				UFS_SENSE_SIZE,
 				0};
 	char *buffer;
 	int ret;
 
-	buffer = kzalloc(UFSHCD_REQ_SENSE_SIZE, GFP_KERNEL);
+	buffer = kzalloc(UFS_SENSE_SIZE, GFP_KERNEL);
 	if (!buffer) {
 		ret = -ENOMEM;
 		goto out;
 	}
 
 	ret = scsi_execute(sdp, cmd, DMA_FROM_DEVICE, buffer,
-			UFSHCD_REQ_SENSE_SIZE, NULL, NULL,
+			UFS_SENSE_SIZE, NULL, NULL,
 			msecs_to_jiffies(1000), 3, 0, RQF_PM, NULL);
 	if (ret)
 		pr_err("%s: failed with err %d\n", __func__, ret);
@@ -8105,6 +8188,7 @@ int ufshcd_alloc_host(struct device *dev, struct ufs_hba **hba_handle)
 	hba->host = host;
 	hba->dev = dev;
 	*hba_handle = hba;
+	hba->dev_ref_clk_freq = REF_CLK_FREQ_INVAL;
 
 	INIT_LIST_HEAD(&hba->clk_list_head);