cxgb4: set skb->rxhash

Implement the ->set_flags ethtool method to control NETIF_F_RXHASH and
set skb->rxhash to the HW calculated hash accordingly.

Follow Eric Dumazet's suggestion and use the hash value raw.

Signed-off-by: Dimitris Michailidis <dm@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/net/cxgb4/cxgb4_main.c b/drivers/net/cxgb4/cxgb4_main.c
index 5f582dba928f..1bad50041427 100644
--- a/drivers/net/cxgb4/cxgb4_main.c
+++ b/drivers/net/cxgb4/cxgb4_main.c
@@ -1711,6 +1711,18 @@ static int set_tso(struct net_device *dev, u32 value)
         return 0;
 }
 
+static int set_flags(struct net_device *dev, u32 flags)
+{
+        if (flags & ~ETH_FLAG_RXHASH)
+                return -EOPNOTSUPP;
+
+        if (flags & ETH_FLAG_RXHASH)
+                dev->features |= NETIF_F_RXHASH;
+        else
+                dev->features &= ~NETIF_F_RXHASH;
+        return 0;
+}
+
 static struct ethtool_ops cxgb_ethtool_ops = {
         .get_settings      = get_settings,
         .set_settings      = set_settings,
@@ -1741,6 +1753,7 @@ static struct ethtool_ops cxgb_ethtool_ops = {
         .get_wol           = get_wol,
         .set_wol           = set_wol,
         .set_tso           = set_tso,
+        .set_flags         = set_flags,
         .flash_device      = set_flash,
 };
 
@@ -3203,7 +3216,7 @@ static int __devinit init_one(struct pci_dev *pdev,
 
                 netdev->features |= NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6;
                 netdev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
-                netdev->features |= NETIF_F_GRO | highdma;
+                netdev->features |= NETIF_F_GRO | NETIF_F_RXHASH | highdma;
                 netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
                 netdev->vlan_features = netdev->features & VLAN_FEAT;