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i40e: fix offload of GRE tunnels

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The driver still was not offloading TSO on GRE tunnels because
it forgot to set the GSO_GRE flag, causing lots of retransmits.

This fixes generic GRE traffic (like a tunnel added like below)
whereas before it would get 1Gb/s or less, now on a 10G adapter
it gets 8.7Gb/s.

ip ad ad 11.1.0.2/24 dev ens2f0
ip l set ens2f0 up
ip link add gre2 type gretap remote 11.1.0.1 local 11.1.0.2 dev ens2f0
ip l set gre2 up
ip ad ad 192.168.124.2/24 dev gre2
ping 192.168.124.1
netperf -H 192.168.124.1

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jesse Brandeburg 2015-10-01 18:25:42 -07:00 committed by David S. Miller
parent d2dd52bf3f
commit fec31ffffa
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/intel/i40e/i40e_main.c
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@ -8389,6 +8389,7 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
netdev->hw_enc_features |= NETIF_F_IP_CSUM |
NETIF_F_GSO_UDP_TUNNEL |
NETIF_F_GSO_GRE |
NETIF_F_TSO;
netdev->features = NETIF_F_SG |
@ -8396,6 +8397,7 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
NETIF_F_SCTP_CSUM |
NETIF_F_HIGHDMA |
NETIF_F_GSO_UDP_TUNNEL |
NETIF_F_GSO_GRE |
NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_CTAG_RX |
NETIF_F_HW_VLAN_CTAG_FILTER |