net/mlx4_en: Implement ndo fdb functionality

Add support for setting embedded switch fdb in case of SRIOV, by
implementing ndo_fdb_{add, del, dump}. This will allow to use
bridged configuration with multi-function. In order to add VM MAC
to the eSwitch fdb, the following command may be used over the relevant function interface:
bridge fdb add <MAC> permanent self dev <IFACE>

Signed-off-by: Yan Burman <yanb@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index 2c19dab..4671fa5 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -1931,6 +1931,78 @@ static int mlx4_en_set_features(struct net_device *netdev,
 
 }
 
+static int mlx4_en_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
+                          struct net_device *dev,
+                          const unsigned char *addr, u16 flags)
+{
+       struct mlx4_en_priv *priv = netdev_priv(dev);
+       struct mlx4_dev *mdev = priv->mdev->dev;
+       int err;
+
+       if (!mlx4_is_mfunc(mdev))
+               return -EOPNOTSUPP;
+
+       /* Hardware does not support aging addresses, allow only
+        * permanent addresses if ndm_state is given
+        */
+       if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
+               en_info(priv, "Add FDB only supports static addresses\n");
+               return -EINVAL;
+       }
+
+       if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
+               err = dev_uc_add_excl(dev, addr);
+       else if (is_multicast_ether_addr(addr))
+               err = dev_mc_add_excl(dev, addr);
+       else
+               err = -EINVAL;
+
+       /* Only return duplicate errors if NLM_F_EXCL is set */
+       if (err == -EEXIST && !(flags & NLM_F_EXCL))
+               err = 0;
+
+       return err;
+}
+
+static int mlx4_en_fdb_del(struct ndmsg *ndm,
+                          struct net_device *dev,
+                          const unsigned char *addr)
+{
+       struct mlx4_en_priv *priv = netdev_priv(dev);
+       struct mlx4_dev *mdev = priv->mdev->dev;
+       int err;
+
+       if (!mlx4_is_mfunc(mdev))
+               return -EOPNOTSUPP;
+
+       if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
+               en_info(priv, "Del FDB only supports static addresses\n");
+               return -EINVAL;
+       }
+
+       if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
+               err = dev_uc_del(dev, addr);
+       else if (is_multicast_ether_addr(addr))
+               err = dev_mc_del(dev, addr);
+       else
+               err = -EINVAL;
+
+       return err;
+}
+
+static int mlx4_en_fdb_dump(struct sk_buff *skb,
+                           struct netlink_callback *cb,
+                           struct net_device *dev, int idx)
+{
+       struct mlx4_en_priv *priv = netdev_priv(dev);
+       struct mlx4_dev *mdev = priv->mdev->dev;
+
+       if (mlx4_is_mfunc(mdev))
+               idx = ndo_dflt_fdb_dump(skb, cb, dev, idx);
+
+       return idx;
+}
+
 static const struct net_device_ops mlx4_netdev_ops = {
        .ndo_open               = mlx4_en_open,
        .ndo_stop               = mlx4_en_close,
@@ -1952,6 +2024,9 @@ static const struct net_device_ops mlx4_netdev_ops = {
 #ifdef CONFIG_RFS_ACCEL
        .ndo_rx_flow_steer      = mlx4_en_filter_rfs,
 #endif
+       .ndo_fdb_add            = mlx4_en_fdb_add,
+       .ndo_fdb_del            = mlx4_en_fdb_del,
+       .ndo_fdb_dump           = mlx4_en_fdb_dump,
 };
 
 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,