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igc: Add GSO partial support 

Partial generic segmentation offload is a hybrid between TSO and GSO.
What is effectively does is take advantage of certain traits of TCP and
tunnels so that instead of having to rewrite the packet headers for each
segment only in the inner-most transport header and possible the outer-most
network header need to be updated.
This allows devices that do not support tunnel offload or tunnels
offloads with checksum to still make use of segmentation.

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Sasha Neftin 2020-02-10 09:04:15 +02:00 committed by Jeff Kirsher
parent 2fcd80144b
commit 34428dff36
1 changed files with 10 additions and 0 deletions
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10
drivers/net/ethernet/intel/igc/igc_main.c
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@ -4727,6 +4727,16 @@ static int igc_probe(struct pci_dev *pdev,
netdev->features |= NETIF_F_HW_CSUM;
netdev->features |= NETIF_F_SCTP_CRC;
#define IGC_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
NETIF_F_GSO_GRE_CSUM | \
NETIF_F_GSO_IPXIP4 | \
NETIF_F_GSO_IPXIP6 | \
NETIF_F_GSO_UDP_TUNNEL | \
NETIF_F_GSO_UDP_TUNNEL_CSUM)
netdev->gso_partial_features = IGC_GSO_PARTIAL_FEATURES;
netdev->features |= NETIF_F_GSO_PARTIAL | IGC_GSO_PARTIAL_FEATURES;
/* setup the private structure */
err = igc_sw_init(adapter);
if (err)