i40evf: TCP/IPv6 over Vxlan Tx checksum offload fix

We were checking the outer Protocol flags and deciding the flow for
inner header. This patch fixes that.
This fixes the Tx checksum offload for TCP/IPv6 over vxlan.

Change-ID: I837aaea921d34f71b24c2bc32aaadea5001ddf78
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c
index be05829ba6193b82962c981afae541b197d0dad2..708891571dae328299e2b31e83cbf40b42726473 100644 (file)
--- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c
@@ -1212,17 +1212,16 @@ static int i40e_tso(struct i40e_ring *tx_ring, struct sk_buff *skb,
        if (err < 0)
                return err;
 
-       if (protocol == htons(ETH_P_IP)) {
-               iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb);
+       iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb);
+       ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb);
+
+       if (iph->version == 4) {
                tcph = skb->encapsulation ? inner_tcp_hdr(skb) : tcp_hdr(skb);
                iph->tot_len = 0;
                iph->check = 0;
                tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
                                                 0, IPPROTO_TCP, 0);
-       } else if (skb_is_gso_v6(skb)) {
-
-               ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb)
-                                          : ipv6_hdr(skb);
+       } else if (ipv6h->version == 6) {
                tcph = skb->encapsulation ? inner_tcp_hdr(skb) : tcp_hdr(skb);
                ipv6h->payload_len = 0;
                tcph->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr,
@@ -1280,13 +1279,9 @@ static void i40e_tx_enable_csum(struct sk_buff *skb, u32 tx_flags,
                                         I40E_TX_CTX_EXT_IP_IPV4_NO_CSUM;
                        }
                } else if (tx_flags & I40E_TX_FLAGS_IPV6) {
-                       if (tx_flags & I40E_TX_FLAGS_TSO) {
-                               *cd_tunneling |= I40E_TX_CTX_EXT_IP_IPV6;
+                       *cd_tunneling |= I40E_TX_CTX_EXT_IP_IPV6;
+                       if (tx_flags & I40E_TX_FLAGS_TSO)
                                ip_hdr(skb)->check = 0;
-                       } else {
-                               *cd_tunneling |=
-                                        I40E_TX_CTX_EXT_IP_IPV4_NO_CSUM;
-                       }
                }
 
                /* Now set the ctx descriptor fields */
@@ -1296,6 +1291,11 @@ static void i40e_tx_enable_csum(struct sk_buff *skb, u32 tx_flags,
                                   ((skb_inner_network_offset(skb) -
                                        skb_transport_offset(skb)) >> 1) <<
                                   I40E_TXD_CTX_QW0_NATLEN_SHIFT;
+               if (this_ip_hdr->version == 6) {
+                       tx_flags &= ~I40E_TX_FLAGS_IPV4;
+                       tx_flags |= I40E_TX_FLAGS_IPV6;
+               }
+
 
        } else {
                network_hdr_len = skb_network_header_len(skb);