cxgb3: Set vlan_feature on net_device

cxgb3 interface has a bad performance when VLAN is set. On my current
setup, a PowerLinux 7R2, I am able to get around 7 Gbps on a TCP_STREAM
(8 instances, 4k message).
With this patch, I am able to reach 9.5 Gbps.

Signed-off-by: Breno Leitao <brenohl@br.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
index 9b0874957df5b4dffc06e2ca22030231d6e346fc..6505070abcfa35dca294a0a097239c4d176e03ee 100644 (file)
--- a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
@@ -3173,6 +3173,9 @@ static void __devinit cxgb3_init_iscsi_mac(struct net_device *dev)
        pi->iscsic.mac_addr[3] |= 0x80;
 }
 
+#define TSO_FLAGS (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
+#define VLAN_FEAT (NETIF_F_SG | NETIF_F_IP_CSUM | TSO_FLAGS | \
+                       NETIF_F_IPV6_CSUM | NETIF_F_HIGHDMA)
 static int __devinit init_one(struct pci_dev *pdev,
                              const struct pci_device_id *ent)
 {
@@ -3293,6 +3296,7 @@ static int __devinit init_one(struct pci_dev *pdev,
                netdev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM |
                        NETIF_F_TSO | NETIF_F_RXCSUM | NETIF_F_HW_VLAN_RX;
                netdev->features |= netdev->hw_features | NETIF_F_HW_VLAN_TX;
+               netdev->vlan_features |= netdev->features & VLAN_FEAT;
                if (pci_using_dac)
                        netdev->features |= NETIF_F_HIGHDMA;