This patch allows ixgbe to recognize encapsulated packets and do the tx
checksum offload in hardware. This patch is only for demonstration
purposes and should not be applied.
Signed-off-by: Joseph Gasparakis <joseph.gaspara...@intel.com>
Signed-off-by: Alexander Duyck <alexander.h.du...@intel.com>
---
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 46 +++++++++++++++++++++------
1 file changed, 37 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index fb165b6..62a7d6e 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -5972,17 +5972,42 @@ static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
if (!(first->tx_flags & IXGBE_TX_FLAGS_TXSW))
return;
}
+ vlan_macip_lens |= skb_network_offset(skb)
+ << IXGBE_ADVTXD_MACLEN_SHIFT;
} else {
u8 l4_hdr = 0;
- switch (first->protocol) {
- case __constant_htons(ETH_P_IP):
- vlan_macip_lens |= skb_network_header_len(skb);
+ union {
+ struct iphdr *ipv4;
+ struct ipv6hdr *ipv6;
+ u8 *raw;
+ } network_hdr;
+ union {
+ struct tcphdr *tcphdr;
+ u8 *raw;
+ } transport_hdr;
+
+ if (skb->encapsulation) {
+ network_hdr.raw = skb_inner_network_header(skb);
+ transport_hdr.raw = skb_inner_transport_header(skb);
+ vlan_macip_lens |= skb_inner_network_offset(skb) <<
+ IXGBE_ADVTXD_MACLEN_SHIFT;
+ } else {
+ network_hdr.raw = skb_network_header(skb);
+ transport_hdr.raw = skb_transport_header(skb);
+ vlan_macip_lens |= skb_network_offset(skb) <<
+ IXGBE_ADVTXD_MACLEN_SHIFT;
+ }
+
+ /* use first 4 bits to determine IP version */
+ switch (network_hdr.ipv4->version) {
+ case 4:
+ vlan_macip_lens |= transport_hdr.raw - network_hdr.raw;
type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
- l4_hdr = ip_hdr(skb)->protocol;
+ l4_hdr = network_hdr.ipv4->protocol;
break;
- case __constant_htons(ETH_P_IPV6):
- vlan_macip_lens |= skb_network_header_len(skb);
- l4_hdr = ipv6_hdr(skb)->nexthdr;
+ case 6:
+ vlan_macip_lens |= transport_hdr.raw - network_hdr.raw;
+ l4_hdr = network_hdr.ipv6->nexthdr;
break;
default:
if (unlikely(net_ratelimit())) {
@@ -5996,7 +6021,7 @@ static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
switch (l4_hdr) {
case IPPROTO_TCP:
type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
- mss_l4len_idx = tcp_hdrlen(skb) <<
+ mss_l4len_idx = (transport_hdr.tcphdr->doff * 4) <<
IXGBE_ADVTXD_L4LEN_SHIFT;
break;
case IPPROTO_SCTP:
@@ -6022,7 +6047,6 @@ static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
}
/* vlan_macip_lens: MACLEN, VLAN tag */
- vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0,
@@ -7383,6 +7407,10 @@ static int ixgbe_probe(struct pci_dev *pdev,
netdev->hw_features = netdev->features;
+ netdev->hw_enc_features = NETIF_F_IP_CSUM |
+ NETIF_F_IPV6_CSUM |
+ NETIF_F_SG;
+
switch (adapter->hw.mac.type) {
case ixgbe_mac_82599EB:
case ixgbe_mac_X540:
--
1.7.11.7
--
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