net/mlx4_en: Manage hash of MAC addresses per port

As a preparation step for supporting multiple unicast addresses, store MAC addresses in hash table.
Remove the radix tree for MAC addresses per QP, as it's not in use.

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>

1 files changed, 19 insertions, 4 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index 2e7f5bb94e1f..91bb8e157253 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -615,10 +615,25 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
                         ethh = (struct ethhdr *)(page_address(frags[0].page) +
                                                  frags[0].offset);
 
-                        /* Drop the packet, since HW loopback-ed it */
-                        if (ether_addr_equal_64bits(dev->dev_addr,
-                                                    ethh->h_source))
-                                goto next;
+                        if (is_multicast_ether_addr(ethh->h_dest)) {
+                                struct mlx4_mac_entry *entry;
+                                struct hlist_node *n;
+                                struct hlist_head *bucket;
+                                unsigned int mac_hash;
+
+                                /* Drop the packet, since HW loopback-ed it */
+                                mac_hash = ethh->h_source[MLX4_EN_MAC_HASH_IDX];
+                                bucket = &priv->mac_hash[mac_hash];
+                                rcu_read_lock();
+                                hlist_for_each_entry_rcu(entry, n, bucket, hlist) {
+                                        if (ether_addr_equal_64bits(entry->mac,
+                                                                    ethh->h_source)) {
+                                                rcu_read_unlock();
+                                                goto next;
+                                        }
+                                }
+                                rcu_read_unlock();
+                        }
                 }
 
                 /*