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>

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 69fa1ce1f92719b0f3ea91fdfeda4cc514aadd30..46ab035c2032040b9f1e3e1c615ddaf026ddbe6a 100644 (file)
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -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)