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Commit fec31fff authored by Jesse Brandeburg's avatar Jesse Brandeburg Committed by David S. Miller
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i40e: fix offload of GRE tunnels 



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: default avatarJesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d2dd52bf

drivers/net/ethernet/intel/i40e/i40e_main.c

+2 −0
Original line number Diff line number Diff line
@@ -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 |