[PATCH 5.4 18/90] net/mlx5e: allow TSO on VXLAN over VLAN topologies

From: Greg Kroah-Hartman
Date: Mon Jun 21 2021 - 12:17:53 EST


From: Davide Caratti <dcaratti@xxxxxxxxxx>

[ Upstream commit a1718505d7f67ee0ab051322f1cbc7ac42b5da82 ]

since mlx5 hardware can segment correctly TSO packets on VXLAN over VLAN
topologies, CPU usage can improve significantly if we enable tunnel
offloads in dev->vlan_features, like it was done in the past with other
NIC drivers (e.g. mlx4, be2net and ixgbe).

Signed-off-by: Davide Caratti <dcaratti@xxxxxxxxxx>
Signed-off-by: Saeed Mahameed <saeedm@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 36b9a364ef26..374ce17e1499 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -5012,6 +5012,8 @@ static void mlx5e_build_nic_netdev(struct net_device *netdev)
netdev->hw_enc_features |= NETIF_F_GSO_UDP_TUNNEL |
NETIF_F_GSO_UDP_TUNNEL_CSUM;
netdev->gso_partial_features = NETIF_F_GSO_UDP_TUNNEL_CSUM;
+ netdev->vlan_features |= NETIF_F_GSO_UDP_TUNNEL |
+ NETIF_F_GSO_UDP_TUNNEL_CSUM;
}

if (mlx5e_tunnel_proto_supported(mdev, IPPROTO_GRE)) {
--
2.30.2