intel: Add support for IPv6 IP-in-IP offload

This patch adds support for offloading IPXIP6 type packets that represent
either IPv4 or IPv6 encapsulated inside of an IPv6 outer IP header.  In
addition with this change we should also be able to support FOU
encapsulated traffic with outer IPv6 headers.

Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -9084,6 +9084,7 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
 				   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	|
 				   NETIF_F_GSO_PARTIAL		|

drivers/net/ethernet/intel/i40e/i40e_txrx.c

@@ -2285,6 +2285,7 @@ static int i40e_tso(struct sk_buff *skb, u8 *hdr_len, u64 *cd_type_cmd_tso_mss)
 	if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
 					 SKB_GSO_GRE_CSUM |
 					 SKB_GSO_IPXIP4 |
+					 SKB_GSO_IPXIP6 |
 					 SKB_GSO_UDP_TUNNEL |
 					 SKB_GSO_UDP_TUNNEL_CSUM)) {
 		if (!(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) &&

drivers/net/ethernet/intel/i40evf/i40e_txrx.c

@@ -1560,6 +1560,7 @@ static int i40e_tso(struct sk_buff *skb, u8 *hdr_len, u64 *cd_type_cmd_tso_mss)
 	if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
 					 SKB_GSO_GRE_CSUM |
 					 SKB_GSO_IPXIP4 |
+					 SKB_GSO_IPXIP6 |
 					 SKB_GSO_UDP_TUNNEL |
 					 SKB_GSO_UDP_TUNNEL_CSUM)) {
 		if (!(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) &&

drivers/net/ethernet/intel/i40evf/i40evf_main.c

@@ -2231,6 +2231,7 @@ int i40evf_process_config(struct i40evf_adapter *adapter)
 				   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	|
 				   NETIF_F_GSO_PARTIAL		|

drivers/net/ethernet/intel/igb/igb_main.c

@@ -2419,6 +2419,7 @@ static int igb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 #define IGB_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)
 

drivers/net/ethernet/intel/igbvf/netdev.c

@@ -2764,6 +2764,7 @@ static int igbvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 #define IGBVF_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)
 

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

@@ -9483,6 +9483,7 @@ skip_sriov:
 #define IXGBE_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)
 

drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

@@ -4063,6 +4063,7 @@ static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 #define IXGBEVF_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)