net/mlx5e: Unify logic of MTU boundaries

Expose a new helper that wraps the logic for setting the
netdevice's MTU boundaries.
Use it for the different components (Eth, rep, IPoIB).

Set the netdevice min MTU to ETH_MIN_MTU, and the max according
to both the FW capability and the kernel definition.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 7ce5ede..bd855ab 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -1086,6 +1086,7 @@ mlx5e_create_netdev(struct mlx5_core_dev *mdev, const struct mlx5e_profile *prof
 int mlx5e_attach_netdev(struct mlx5e_priv *priv);
 void mlx5e_detach_netdev(struct mlx5e_priv *priv);
 void mlx5e_destroy_netdev(struct mlx5e_priv *priv);
+void mlx5e_set_netdev_mtu_boundaries(struct mlx5e_priv *priv);
 void mlx5e_build_nic_params(struct mlx5_core_dev *mdev,
                            struct mlx5e_rss_params *rss_params,
                            struct mlx5e_params *params,

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 35ce60b..ba70539 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -2811,6 +2811,21 @@ int mlx5e_set_dev_port_mtu(struct mlx5e_priv *priv)
        return 0;
 }
 
+void mlx5e_set_netdev_mtu_boundaries(struct mlx5e_priv *priv)
+{
+       struct mlx5e_params *params = &priv->channels.params;
+       struct net_device *netdev   = priv->netdev;
+       struct mlx5_core_dev *mdev  = priv->mdev;
+       u16 max_mtu;
+
+       /* MTU range: 68 - hw-specific max */
+       netdev->min_mtu = ETH_MIN_MTU;
+
+       mlx5_query_port_max_mtu(mdev, &max_mtu, 1);
+       netdev->max_mtu = min_t(unsigned int, MLX5E_HW2SW_MTU(params, max_mtu),
+                               ETH_MAX_MTU);
+}
+
 static void mlx5e_netdev_set_tcs(struct net_device *netdev)
 {
        struct mlx5e_priv *priv = netdev_priv(netdev);
@@ -4912,7 +4927,6 @@ static void mlx5e_nic_enable(struct mlx5e_priv *priv)
 {
        struct net_device *netdev = priv->netdev;
        struct mlx5_core_dev *mdev = priv->mdev;
-       u16 max_mtu;
 
        mlx5e_init_l2_addr(priv);
 
@@ -4920,10 +4934,7 @@ static void mlx5e_nic_enable(struct mlx5e_priv *priv)
        if (!netif_running(netdev))
                mlx5_set_port_admin_status(mdev, MLX5_PORT_DOWN);
 
-       /* MTU range: 68 - hw-specific max */
-       netdev->min_mtu = ETH_MIN_MTU;
-       mlx5_query_port_max_mtu(priv->mdev, &max_mtu, 1);
-       netdev->max_mtu = MLX5E_HW2SW_MTU(&priv->channels.params, max_mtu);
+       mlx5e_set_netdev_mtu_boundaries(priv);
        mlx5e_set_dev_port_mtu(priv);
 
        mlx5_lag_add(mdev, netdev);

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
index 94c3965..6bfdefa 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
@@ -1624,13 +1624,7 @@ static void mlx5e_cleanup_rep_tx(struct mlx5e_priv *priv)
 
 static void mlx5e_vf_rep_enable(struct mlx5e_priv *priv)
 {
-       struct net_device *netdev = priv->netdev;
-       struct mlx5_core_dev *mdev = priv->mdev;
-       u16 max_mtu;
-
-       netdev->min_mtu = ETH_MIN_MTU;
-       mlx5_query_port_max_mtu(mdev, &max_mtu, 1);
-       netdev->max_mtu = MLX5E_HW2SW_MTU(&priv->channels.params, max_mtu);
+       mlx5e_set_netdev_mtu_boundaries(priv);
 }
 
 static int uplink_rep_async_event(struct notifier_block *nb, unsigned long event, void *data)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c b/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c
index 4eac425..9b03ae1 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c
@@ -77,15 +77,14 @@ int mlx5i_init(struct mlx5_core_dev *mdev,
               void *ppriv)
 {
        struct mlx5e_priv *priv  = mlx5i_epriv(netdev);
-       u16 max_mtu;
        int err;
 
        err = mlx5e_netdev_init(netdev, priv, mdev, profile, ppriv);
        if (err)
                return err;
 
-       mlx5_query_port_max_mtu(mdev, &max_mtu, 1);
-       netdev->mtu = max_mtu;
+       mlx5e_set_netdev_mtu_boundaries(priv);
+       netdev->mtu = netdev->max_mtu;
 
        mlx5e_build_nic_params(mdev, &priv->rss_params, &priv->channels.params,
                               mlx5e_get_netdev_max_channels(netdev),