net/mlx5e: Add DCBX control interface
authorHuy Nguyen <huyn@mellanox.com>
Sun, 27 Nov 2016 15:02:08 +0000 (17:02 +0200)
committerDavid S. Miller <davem@davemloft.net>
Mon, 28 Nov 2016 20:09:35 +0000 (15:09 -0500)
Use setdcbx interface to set the DCBX mode to firmware or os.
If setdcbx is called with mode value of zero, the DCBX mode
is set to firmware.

Signed-off-by: Huy Nguyen <huyn@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c

index 1753182e8959db08c7a03c2a89e78b2bf23b0ccf..7f6c225666c18b193f642ba74cb8637e471ab3fc 100644 (file)
@@ -287,13 +287,34 @@ static int mlx5e_dcbnl_ieee_setpfc(struct net_device *dev,
 
 static u8 mlx5e_dcbnl_getdcbx(struct net_device *dev)
 {
-       return DCB_CAP_DCBX_HOST |
-              DCB_CAP_DCBX_VER_IEEE |
-              DCB_CAP_DCBX_VER_CEE;
+       struct mlx5e_priv *priv = netdev_priv(dev);
+       struct mlx5e_dcbx *dcbx = &priv->dcbx;
+       u8 mode = DCB_CAP_DCBX_VER_IEEE | DCB_CAP_DCBX_VER_CEE;
+
+       if (dcbx->mode == MLX5E_DCBX_PARAM_VER_OPER_HOST)
+               mode |= DCB_CAP_DCBX_HOST;
+
+       return mode;
 }
 
 static u8 mlx5e_dcbnl_setdcbx(struct net_device *dev, u8 mode)
 {
+       struct mlx5e_priv *priv = netdev_priv(dev);
+       struct mlx5e_dcbx *dcbx = &priv->dcbx;
+
+       if ((!mode) && MLX5_CAP_GEN(priv->mdev, dcbx)) {
+               if (dcbx->mode == MLX5E_DCBX_PARAM_VER_OPER_AUTO)
+                       return 0;
+
+               /* set dcbx to fw controlled */
+               if (!mlx5e_dcbnl_set_dcbx_mode(priv, MLX5E_DCBX_PARAM_VER_OPER_AUTO)) {
+                       dcbx->mode = MLX5E_DCBX_PARAM_VER_OPER_AUTO;
+                       return 0;
+               }
+
+               return 1;
+       }
+
        if (mlx5e_dcbnl_switch_to_host_mode(netdev_priv(dev)))
                return 1;