net/mlx5e: Support TSO and TX checksum offloads for IP-in-IP

tunnels

Add TX offloads support for IP-in-IP tunneled packets by reporting
the needed netdev features.
Signed-off-by: Marina Varshaver <marinav@mellanox.com>
Signed-off-by: Avihu Hagag <avihuh@mellanox.com>
Reviewed-by: Aya Levin <ayal@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/en_main.c

@@ -4243,6 +4243,8 @@ static netdev_features_t mlx5e_tunnel_features_check(struct mlx5e_priv *priv,
 
 	switch (proto) {
 	case IPPROTO_GRE:
+	case IPPROTO_IPIP:
+	case IPPROTO_IPV6:
 		return features;
 	case IPPROTO_UDP:
 		udph = udp_hdr(skb);
@@ -4903,6 +4905,15 @@ static void mlx5e_build_nic_netdev(struct net_device *netdev)
 						NETIF_F_GSO_GRE_CSUM;
 	}
 
+	if (mlx5e_tunnel_proto_supported(mdev, IPPROTO_IPIP)) {
+		netdev->hw_features |= NETIF_F_GSO_IPXIP4 |
+				       NETIF_F_GSO_IPXIP6;
+		netdev->hw_enc_features |= NETIF_F_GSO_IPXIP4 |
+					   NETIF_F_GSO_IPXIP6;
+		netdev->gso_partial_features |= NETIF_F_GSO_IPXIP4 |
+						NETIF_F_GSO_IPXIP6;
+	}
+
 	netdev->hw_features	                 |= NETIF_F_GSO_PARTIAL;
 	netdev->gso_partial_features             |= NETIF_F_GSO_UDP_L4;
 	netdev->hw_features                      |= NETIF_F_GSO_UDP_L4;