bnx2: Add support for skb->rxhash.

Add skb->rxhash support for TCP packets only because the bnx2 RSS hash
does not hash UDP ports.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 17 insertions, 1 deletions

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 0614ca0b15fe..1450c75bc19d 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -3219,6 +3219,10 @@ bnx2_rx_int(struct bnx2 *bp, struct bnx2_napi *bnapi, int budget)
                                               L2_FHDR_ERRORS_UDP_XSUM)) == 0))
                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
                 }
+                if ((bp->dev->features & NETIF_F_RXHASH) &&
+                    ((status & L2_FHDR_STATUS_USE_RXHASH) ==
+                     L2_FHDR_STATUS_USE_RXHASH))
+                        skb->rxhash = rx_hdr->l2_fhdr_hash;
 
                 skb_record_rx_queue(skb, bnapi - &bp->bnx2_napi[0]);
 
@@ -7558,6 +7562,12 @@ bnx2_set_tx_csum(struct net_device *dev, u32 data)
                 return (ethtool_op_set_tx_csum(dev, data));
 }
 
+static int
+bnx2_set_flags(struct net_device *dev, u32 data)
+{
+        return ethtool_op_set_flags(dev, data, ETH_FLAG_RXHASH);
+}
+
 static const struct ethtool_ops bnx2_ethtool_ops = {
         .get_settings           = bnx2_get_settings,
         .set_settings           = bnx2_set_settings,
@@ -7587,6 +7597,8 @@ static const struct ethtool_ops bnx2_ethtool_ops = {
         .phys_id                = bnx2_phys_id,
         .get_ethtool_stats      = bnx2_get_ethtool_stats,
         .get_sset_count         = bnx2_get_sset_count,
+        .set_flags              = bnx2_set_flags,
+        .get_flags              = ethtool_op_get_flags,
 };
 
 /* Called with rtnl_lock */
@@ -8333,7 +8345,8 @@ bnx2_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
         memcpy(dev->dev_addr, bp->mac_addr, 6);
         memcpy(dev->perm_addr, bp->mac_addr, 6);
 
-        dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_GRO;
+        dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_GRO |
+                         NETIF_F_RXHASH;
         vlan_features_add(dev, NETIF_F_IP_CSUM | NETIF_F_SG);
         if (CHIP_NUM(bp) == CHIP_NUM_5709) {
                 dev->features |= NETIF_F_IPV6_CSUM;
diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h
index ddaa3fc99876..b9af6bcef894 100644
--- a/drivers/net/bnx2.h
+++ b/drivers/net/bnx2.h
@@ -295,6 +295,9 @@ struct l2_fhdr {
                 #define L2_FHDR_ERRORS_TCP_XSUM         (1<<28)
                 #define L2_FHDR_ERRORS_UDP_XSUM         (1<<31)
 
+                #define L2_FHDR_STATUS_USE_RXHASH       \
+                        (L2_FHDR_STATUS_TCP_SEGMENT | L2_FHDR_STATUS_RSS_HASH)
+
         u32 l2_fhdr_hash;
 #if defined(__BIG_ENDIAN)
         u16 l2_fhdr_pkt_len;