fsi: Add regmap and refactor sbefifo

Merge series from Eddie James <eajames@linux.ibm.com>:

The SBEFIFO hardware can now be attached over a new I2C endpoint interface
called the I2C Responder (I2CR). In order to use the existing SBEFIFO
driver, add a regmap driver for the FSI bus and an endpoint driver for the
I2CR. Then, refactor the SBEFIFO and OCC drivers to clean up and use the
new regmap driver or the I2CR interface.

This branch just has the regmap change so it can be shared with the FSI
code.

2 files changed, 28 insertions, 13 deletions

diff --git a/drivers/net/netdevsim/bus.c b/drivers/net/netdevsim/bus.c
index b5f4df1a07a3..0052968e881e 100644
--- a/drivers/net/netdevsim/bus.c
+++ b/drivers/net/netdevsim/bus.c
@@ -117,6 +117,10 @@ static const struct attribute_group *nsim_bus_dev_attr_groups[] = {
 
 static void nsim_bus_dev_release(struct device *dev)
 {
+	struct nsim_bus_dev *nsim_bus_dev;
+
+	nsim_bus_dev = container_of(dev, struct nsim_bus_dev, dev);
+	kfree(nsim_bus_dev);
 }
 
 static struct device_type nsim_bus_dev_type = {
@@ -291,6 +295,8 @@ nsim_bus_dev_new(unsigned int id, unsigned int port_count, unsigned int num_queu
 
 err_nsim_bus_dev_id_free:
 	ida_free(&nsim_bus_dev_ids, nsim_bus_dev->dev.id);
+	put_device(&nsim_bus_dev->dev);
+	nsim_bus_dev = NULL;
 err_nsim_bus_dev_free:
 	kfree(nsim_bus_dev);
 	return ERR_PTR(err);
@@ -300,9 +306,8 @@ static void nsim_bus_dev_del(struct nsim_bus_dev *nsim_bus_dev)
 {
 	/* Disallow using nsim_bus_dev */
 	smp_store_release(&nsim_bus_dev->init, false);
-	device_unregister(&nsim_bus_dev->dev);
 	ida_free(&nsim_bus_dev_ids, nsim_bus_dev->dev.id);
-	kfree(nsim_bus_dev);
+	device_unregister(&nsim_bus_dev->dev);
 }
 
 static struct device_driver nsim_driver = {
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 794fc0cc73b8..68e56e451b2b 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -309,8 +309,10 @@ static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
 	if (IS_ERR(nsim_dev->ddir))
 		return PTR_ERR(nsim_dev->ddir);
 	nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
-	if (IS_ERR(nsim_dev->ports_ddir))
-		return PTR_ERR(nsim_dev->ports_ddir);
+	if (IS_ERR(nsim_dev->ports_ddir)) {
+		err = PTR_ERR(nsim_dev->ports_ddir);
+		goto err_ddir;
+	}
 	debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
 			    &nsim_dev->fw_update_status);
 	debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir,
@@ -346,7 +348,7 @@ static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
 	nsim_dev->nodes_ddir = debugfs_create_dir("rate_nodes", nsim_dev->ddir);
 	if (IS_ERR(nsim_dev->nodes_ddir)) {
 		err = PTR_ERR(nsim_dev->nodes_ddir);
-		goto err_out;
+		goto err_ports_ddir;
 	}
 	debugfs_create_bool("fail_trap_drop_counter_get", 0600,
 			    nsim_dev->ddir,
@@ -354,8 +356,9 @@ static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
 	nsim_udp_tunnels_debugfs_create(nsim_dev);
 	return 0;
 
-err_out:
+err_ports_ddir:
 	debugfs_remove_recursive(nsim_dev->ports_ddir);
+err_ddir:
 	debugfs_remove_recursive(nsim_dev->ddir);
 	return err;
 }
@@ -442,7 +445,7 @@ static int nsim_dev_resources_register(struct devlink *devlink)
 				     &params);
 	if (err) {
 		pr_err("Failed to register IPv4 top resource\n");
-		goto out;
+		goto err_out;
 	}
 
 	err = devl_resource_register(devlink, "fib", (u64)-1,
@@ -450,7 +453,7 @@ static int nsim_dev_resources_register(struct devlink *devlink)
 				     NSIM_RESOURCE_IPV4, &params);
 	if (err) {
 		pr_err("Failed to register IPv4 FIB resource\n");
-		return err;
+		goto err_out;
 	}
 
 	err = devl_resource_register(devlink, "fib-rules", (u64)-1,
@@ -458,7 +461,7 @@ static int nsim_dev_resources_register(struct devlink *devlink)
 				     NSIM_RESOURCE_IPV4, &params);
 	if (err) {
 		pr_err("Failed to register IPv4 FIB rules resource\n");
-		return err;
+		goto err_out;
 	}
 
 	/* Resources for IPv6 */
@@ -468,7 +471,7 @@ static int nsim_dev_resources_register(struct devlink *devlink)
 				     &params);
 	if (err) {
 		pr_err("Failed to register IPv6 top resource\n");
-		goto out;
+		goto err_out;
 	}
 
 	err = devl_resource_register(devlink, "fib", (u64)-1,
@@ -476,7 +479,7 @@ static int nsim_dev_resources_register(struct devlink *devlink)
 				     NSIM_RESOURCE_IPV6, &params);
 	if (err) {
 		pr_err("Failed to register IPv6 FIB resource\n");
-		return err;
+		goto err_out;
 	}
 
 	err = devl_resource_register(devlink, "fib-rules", (u64)-1,
@@ -484,7 +487,7 @@ static int nsim_dev_resources_register(struct devlink *devlink)
 				     NSIM_RESOURCE_IPV6, &params);
 	if (err) {
 		pr_err("Failed to register IPv6 FIB rules resource\n");
-		return err;
+		goto err_out;
 	}
 
 	/* Resources for nexthops */
@@ -492,8 +495,14 @@ static int nsim_dev_resources_register(struct devlink *devlink)
 				     NSIM_RESOURCE_NEXTHOPS,
 				     DEVLINK_RESOURCE_ID_PARENT_TOP,
 				     &params);
+	if (err) {
+		pr_err("Failed to register NEXTHOPS resource\n");
+		goto err_out;
+	}
+	return 0;
 
-out:
+err_out:
+	devl_resources_unregister(devlink);
 	return err;
 }
 
@@ -1674,6 +1683,7 @@ void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev)
 				  ARRAY_SIZE(nsim_devlink_params));
 	devl_resources_unregister(devlink);
 	kfree(nsim_dev->vfconfigs);
+	kfree(nsim_dev->fa_cookie);
 	devl_unlock(devlink);
 	devlink_free(devlink);
 	dev_set_drvdata(&nsim_bus_dev->dev, NULL);