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nfp: support VxLAN inner TSO with GSO_PARTIAL offload
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VxLAN belongs to UDP-based encapsulation protocol. Inner TSO for VxLAN
packet with udpcsum requires offloading of outer header csum.

The device doesn't support outer header csum offload. However, inner TSO
for VxLAN with udpcsum can still work with GSO_PARTIAL offload, which
means outer udp csum computed by stack and inner tcp segmentation finished
by hardware. Thus, the patch enable features "NETIF_F_GSO_UDP_TUNNEL_CSUM"
and "NETIF_F_GSO_PARTIAL" and set gso_partial_features.

Signed-off-by: Fei Qin <fei.qin@corigine.com>
Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com>
Signed-off-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20220430231150.175270-1-simon.horman@corigine.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Fei Qin authored and Paolo Abeni committed May 2, 2022
1 parent a313f85 commit ae664d9
Showing 1 changed file with 6 additions and 2 deletions.
8 changes: 6 additions & 2 deletions drivers/net/ethernet/netronome/nfp/nfp_net_common.c
Original file line number Diff line number Diff line change
Expand Up @@ -2259,8 +2259,12 @@ static void nfp_net_netdev_init(struct nfp_net *nn)
if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY)
netdev->hw_features |= NETIF_F_RXHASH;
if (nn->cap & NFP_NET_CFG_CTRL_VXLAN) {
if (nn->cap & NFP_NET_CFG_CTRL_LSO)
netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL;
if (nn->cap & NFP_NET_CFG_CTRL_LSO) {
netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL |
NETIF_F_GSO_UDP_TUNNEL_CSUM |
NETIF_F_GSO_PARTIAL;
netdev->gso_partial_features = NETIF_F_GSO_UDP_TUNNEL_CSUM;
}
netdev->udp_tunnel_nic_info = &nfp_udp_tunnels;
nn->dp.ctrl |= NFP_NET_CFG_CTRL_VXLAN;
}
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