mlx4: Implement port type setting via devlink interface

So far, there has been an mlx4-specific sysfs file allowing user to
change port type to either Ethernet of InfiniBand. This is very
inconvenient.

Allow to expose the same ability to set port type in a generic way
using devlink interface.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 4f5cfe4989ce55bf0f4b29c1ed1647a31529ee70..b8a51515e73cf5aea030b79848d25964d06472f5 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -1082,36 +1082,20 @@ static ssize_t show_port_type(struct device *dev,
        return strlen(buf);
 }
 
-static ssize_t set_port_type(struct device *dev,
-                            struct device_attribute *attr,
-                            const char *buf, size_t count)
+static int __set_port_type(struct mlx4_port_info *info,
+                          enum mlx4_port_type port_type)
 {
-       struct mlx4_port_info *info = container_of(attr, struct mlx4_port_info,
-                                                  port_attr);
        struct mlx4_dev *mdev = info->dev;
        struct mlx4_priv *priv = mlx4_priv(mdev);
        enum mlx4_port_type types[MLX4_MAX_PORTS];
        enum mlx4_port_type new_types[MLX4_MAX_PORTS];
-       static DEFINE_MUTEX(set_port_type_mutex);
        int i;
        int err = 0;
 
-       mutex_lock(&set_port_type_mutex);
-
-       if (!strcmp(buf, "ib\n"))
-               info->tmp_type = MLX4_PORT_TYPE_IB;
-       else if (!strcmp(buf, "eth\n"))
-               info->tmp_type = MLX4_PORT_TYPE_ETH;
-       else if (!strcmp(buf, "auto\n"))
-               info->tmp_type = MLX4_PORT_TYPE_AUTO;
-       else {
-               mlx4_err(mdev, "%s is not supported port type\n", buf);
-               err = -EINVAL;
-               goto err_out;
-       }
-
        mlx4_stop_sense(mdev);
        mutex_lock(&priv->port_mutex);
+       info->tmp_type = port_type;
+
        /* Possible type is always the one that was delivered */
        mdev->caps.possible_type[info->port] = info->tmp_type;
 
@@ -1153,6 +1137,37 @@ static ssize_t set_port_type(struct device *dev,
 out:
        mlx4_start_sense(mdev);
        mutex_unlock(&priv->port_mutex);
+
+       return err;
+}
+
+static ssize_t set_port_type(struct device *dev,
+                            struct device_attribute *attr,
+                            const char *buf, size_t count)
+{
+       struct mlx4_port_info *info = container_of(attr, struct mlx4_port_info,
+                                                  port_attr);
+       struct mlx4_dev *mdev = info->dev;
+       enum mlx4_port_type port_type;
+       static DEFINE_MUTEX(set_port_type_mutex);
+       int err;
+
+       mutex_lock(&set_port_type_mutex);
+
+       if (!strcmp(buf, "ib\n")) {
+               port_type = MLX4_PORT_TYPE_IB;
+       } else if (!strcmp(buf, "eth\n")) {
+               port_type = MLX4_PORT_TYPE_ETH;
+       } else if (!strcmp(buf, "auto\n")) {
+               port_type = MLX4_PORT_TYPE_AUTO;
+       } else {
+               mlx4_err(mdev, "%s is not supported port type\n", buf);
+               err = -EINVAL;
+               goto err_out;
+       }
+
+       err = __set_port_type(info, port_type);
+
 err_out:
        mutex_unlock(&set_port_type_mutex);
 
@@ -3685,6 +3700,35 @@ err_disable_pdev:
        return err;
 }
 
+static int mlx4_devlink_port_type_set(struct devlink_port *devlink_port,
+                                     enum devlink_port_type port_type)
+{
+       struct mlx4_port_info *info = container_of(devlink_port,
+                                                  struct mlx4_port_info,
+                                                  devlink_port);
+       enum mlx4_port_type mlx4_port_type;
+
+       switch (port_type) {
+       case DEVLINK_PORT_TYPE_AUTO:
+               mlx4_port_type = MLX4_PORT_TYPE_AUTO;
+               break;
+       case DEVLINK_PORT_TYPE_ETH:
+               mlx4_port_type = MLX4_PORT_TYPE_ETH;
+               break;
+       case DEVLINK_PORT_TYPE_IB:
+               mlx4_port_type = MLX4_PORT_TYPE_IB;
+               break;
+       default:
+               return -EOPNOTSUPP;
+       }
+
+       return __set_port_type(info, mlx4_port_type);
+}
+
+static const struct devlink_ops mlx4_devlink_ops = {
+       .port_type_set  = mlx4_devlink_port_type_set,
+};
+
 static int mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 {
        struct devlink *devlink;
@@ -3694,7 +3738,7 @@ static int mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 
        printk_once(KERN_INFO "%s", mlx4_version);
 
-       devlink = devlink_alloc(NULL, sizeof(*priv));
+       devlink = devlink_alloc(&mlx4_devlink_ops, sizeof(*priv));
        if (!devlink)
                return -ENOMEM;
        priv = devlink_priv(devlink);