net/mlx5: Use devl_ API in mlx5_esw_devlink_sf_port_register

The function mlx5_esw_devlink_sf_port_register() calls
devlink_port_register() and devlink_rate_leaf_create(). Use devl_ API to
call devl_port_register() and devl_rate_leaf_create() accordingly and
add devlink instance lock in driver paths to this function.

Similarly, use devl_ API to call devl_port_unregister() and
devl_rate_leaf_destroy() in mlx5_esw_devlink_sf_port_unregister() and
ensure locking devlink instance lock on all the paths to this function
too.

This will be used by the downstream patch to invoke
mlx5_devlink_eswitch_mode_set() with devlink lock held.

Note this patch is taking devlink lock on mlx5_devlink_sf_port_new/del()
which are devlink callbacks for port_new/del(). We will take these locks
off once these callbacks will be locked by devlink too.
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/mellanox/mlx5/core/esw/devlink_port.c

@@ -156,11 +156,11 @@ int mlx5_esw_devlink_sf_port_register(struct mlx5_eswitch *esw, struct devlink_p
 	devlink_port_attrs_pci_sf_set(dl_port, controller, pfnum, sfnum, !!controller);
 	devlink = priv_to_devlink(dev);
 	dl_port_index = mlx5_esw_vport_to_devlink_port_index(dev, vport_num);
-	err = devlink_port_register(devlink, dl_port, dl_port_index);
+	err = devl_port_register(devlink, dl_port, dl_port_index);
 	if (err)
 		return err;
 
-	err = devlink_rate_leaf_create(dl_port, vport);
+	err = devl_rate_leaf_create(dl_port, vport);
 	if (err)
 		goto rate_err;
 
@@ -168,7 +168,7 @@ int mlx5_esw_devlink_sf_port_register(struct mlx5_eswitch *esw, struct devlink_p
 	return 0;
 
 rate_err:
-	devlink_port_unregister(dl_port);
+	devl_port_unregister(dl_port);
 	return err;
 }
 
@@ -182,9 +182,9 @@ void mlx5_esw_devlink_sf_port_unregister(struct mlx5_eswitch *esw, u16 vport_num
 
 	if (vport->dl_port->devlink_rate) {
 		mlx5_esw_qos_vport_update_group(esw, vport, NULL, NULL);
-		devlink_rate_leaf_destroy(vport->dl_port);
+		devl_rate_leaf_destroy(vport->dl_port);
 	}
 
-	devlink_port_unregister(vport->dl_port);
+	devl_port_unregister(vport->dl_port);
 	vport->dl_port = NULL;
 }

drivers/net/ethernet/mellanox/mlx5/core/sf/devlink.c

@@ -355,7 +355,9 @@ int mlx5_devlink_sf_port_new(struct devlink *devlink,
 				   "Port add is only supported in eswitch switchdev mode or SF ports are disabled.");
 		return -EOPNOTSUPP;
 	}
+	devl_lock(devlink);
 	err = mlx5_sf_add(dev, table, new_attr, extack, new_port_index);
+	devl_unlock(devlink);
 	mlx5_sf_table_put(table);
 	return err;
 }
@@ -400,7 +402,9 @@ int mlx5_devlink_sf_port_del(struct devlink *devlink, unsigned int port_index,
 		goto sf_err;
 	}
 
+	devl_lock(devlink);
 	mlx5_esw_offloads_sf_vport_disable(esw, sf->hw_fn_id);
+	devl_unlock(devlink);
 	mlx5_sf_id_erase(table, sf);
 
 	mutex_lock(&table->sf_state_lock);