netdev - [PATCH 6/7] mlx4_en: Adding rxhash support

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Date:	Mon, 17 Oct 2011 22:18:19 +0200
From:	Yevgeny Petrilin <yevgenyp@...lanox.co.il>
To:	<davem@...emloft.net>
CC:	<netdev@...r.kernel.org>, <yevgenyp@...lanox.co.il>
Subject: [PATCH 6/7] mlx4_en: Adding rxhash support


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

Signed-off-by: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
---
 drivers/net/ethernet/mellanox/mlx4/en_netdev.c |    2 +-
 drivers/net/ethernet/mellanox/mlx4/en_rx.c     |    9 +++++++++
 2 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index c4c4be4..78d776b 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 f42c7a6..ae5feed 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));
@@ -865,6 +871,9 @@ 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] = random32();
 
 	if (priv->mdev->profile.udp_rss)
 		rss_context->base_qpn_udp = rss_context->default_qpn;
-- 
1.7.7



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