[net-next PATCH 5/8] mlx4: Add support for UDP tunnel segmentation with outer checksum offload

[Alexander Duyck]

This patch assumes that the mlx4 hardware will ignore existing IPv4/v6
header fields for length and checksum as well as the length and checksum
fields for outer UDP headers.

Signed-off-by: Alexander Duyck <adu...@mirantis.com>
---
 drivers/net/ethernet/mellanox/mlx4/en_netdev.c |   17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c 
b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index 8bd143dda95d..bce37cbfde24 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -2358,7 +2358,9 @@ out:
 
        /* set offloads */
        priv->dev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM |
-                                     NETIF_F_TSO | NETIF_F_GSO_UDP_TUNNEL;
+                                     NETIF_F_TSO | NETIF_F_GSO_UDP_TUNNEL |
+                                     NETIF_F_GSO_UDP_TUNNEL_CSUM |
+                                     NETIF_F_GSO_PARTIAL;
 }
 
 static void mlx4_en_del_vxlan_offloads(struct work_struct *work)
@@ -2368,7 +2370,9 @@ static void mlx4_en_del_vxlan_offloads(struct work_struct 
*work)
                                                 vxlan_del_task);
        /* unset offloads */
        priv->dev->hw_enc_features &= ~(NETIF_F_IP_CSUM | NETIF_F_RXCSUM |
-                                     NETIF_F_TSO | NETIF_F_GSO_UDP_TUNNEL);
+                                       NETIF_F_TSO | NETIF_F_GSO_UDP_TUNNEL |
+                                       NETIF_F_GSO_UDP_TUNNEL_CSUM |
+                                       NETIF_F_GSO_PARTIAL);
 
        ret = mlx4_SET_PORT_VXLAN(priv->mdev->dev, priv->port,
                                  VXLAN_STEER_BY_OUTER_MAC, 0);
@@ -2992,8 +2996,13 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int 
port,
        }
 
        if (mdev->dev->caps.tunnel_offload_mode == 
MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
-               dev->hw_features |= NETIF_F_GSO_UDP_TUNNEL;
-               dev->features    |= NETIF_F_GSO_UDP_TUNNEL;
+               dev->hw_features |= NETIF_F_GSO_UDP_TUNNEL |
+                                   NETIF_F_GSO_UDP_TUNNEL_CSUM |
+                                   NETIF_F_GSO_PARTIAL;
+               dev->features    |= NETIF_F_GSO_UDP_TUNNEL |
+                                   NETIF_F_GSO_UDP_TUNNEL_CSUM |
+                                   NETIF_F_GSO_PARTIAL;
+               dev->gso_partial_features = NETIF_F_GSO_UDP_TUNNEL_CSUM;
        }
 
        mdev->pndev[port] = dev;