mlx4_en: Adding rxhash support

Moving to Toeplitz function in RSS calculation.
Reporting rxhash in skb.

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 13 insertions, 1 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index c4c4be426921..78d776bc355c 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -1084,7 +1084,7 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
 
         dev->vlan_features = dev->hw_features;
 
-        dev->hw_features |= NETIF_F_RXCSUM;
+        dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_RXHASH;
         dev->features = dev->hw_features | NETIF_F_HIGHDMA |
                         NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
                         NETIF_F_HW_VLAN_FILTER;
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index dbf466426f5a..9b18d8554071 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -618,6 +618,9 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
                                                 __vlan_hwaccel_put_tag(gro_skb, vid);
                                         }
 
+                                        if (dev->features & NETIF_F_RXHASH)
+                                                gro_skb->rxhash = be32_to_cpu(cqe->immed_rss_invalid);
+
                                         skb_record_rx_queue(gro_skb, cq->ring);
                                         napi_gro_frags(&cq->napi);
 
@@ -651,6 +654,9 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
                 skb->protocol = eth_type_trans(skb, dev);
                 skb_record_rx_queue(skb, cq->ring);
 
+                if (dev->features & NETIF_F_RXHASH)
+                        skb->rxhash = be32_to_cpu(cqe->immed_rss_invalid);
+
                 if (be32_to_cpu(cqe->vlan_my_qpn) &
                     MLX4_CQE_VLAN_PRESENT_MASK)
                         __vlan_hwaccel_put_tag(skb, be16_to_cpu(cqe->sl_vid));
@@ -834,6 +840,9 @@ int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv)
         int i, qpn;
         int err = 0;
         int good_qps = 0;
+        static const u32 rsskey[10] = { 0xD181C62C, 0xF7F4DB5B, 0x1983A2FC,
+                                0x943E1ADB, 0xD9389E6B, 0xD1039C2C, 0xA74499AD,
+                                0x593D56D9, 0xF3253C06, 0x2ADC1FFC};
 
         en_dbg(DRV, priv, "Configuring rss steering\n");
         err = mlx4_qp_reserve_range(mdev->dev, priv->rx_ring_num,
@@ -871,6 +880,9 @@ int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv)
                                             (rss_map->base_qpn));
         rss_context->default_qpn = cpu_to_be32(rss_map->base_qpn);
         rss_context->flags = rss_mask;
+        rss_context->hash_fn = 1;
+        for (i = 0; i < 10; i++)
+                rss_context->rss_key[i] = rsskey[i];
 
         if (priv->mdev->profile.udp_rss)
                 rss_context->base_qpn_udp = rss_context->default_qpn;