diff options
| author | KY Srinivasan <kys@microsoft.com> | 2014-03-08 19:23:18 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-03-10 15:51:37 -0400 |
| commit | 77bf5487946254798ed7f265877939c703189f1e (patch) | |
| tree | 5420a2dc396c09173940c73d761f0aea0fd6bed5 /drivers/net/hyperv/netvsc_drv.c | |
| parent | 08cd04bf6d5b14ea90845b596d371bfa33eaba06 (diff) | |
Drivers: net: hyperv: Enable large send offload
Enable segmentation offload.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/hyperv/netvsc_drv.c')
| -rw-r--r-- | drivers/net/hyperv/netvsc_drv.c | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 697837537ccb..3d069901e6d9 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -298,6 +298,7 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) bool isvlan; struct rndis_per_packet_info *ppi; struct ndis_tcp_ip_checksum_info *csum_info; + struct ndis_tcp_lso_info *lso_info; int hdr_offset; u32 net_trans_info; @@ -377,7 +378,7 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) * GSO packet. */ if (skb_is_gso(skb)) - goto do_send; + goto do_lso; rndis_msg_size += NDIS_CSUM_PPI_SIZE; ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, @@ -397,6 +398,35 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) } else if (net_trans_info & INFO_UDP) { csum_info->transmit.udp_checksum = 1; } + goto do_send; + +do_lso: + rndis_msg_size += NDIS_LSO_PPI_SIZE; + ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE, + TCP_LARGESEND_PKTINFO); + + lso_info = (struct ndis_tcp_lso_info *)((void *)ppi + + ppi->ppi_offset); + + lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE; + if (net_trans_info & (INFO_IPV4 << 16)) { + lso_info->lso_v2_transmit.ip_version = + NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4; + ip_hdr(skb)->tot_len = 0; + ip_hdr(skb)->check = 0; + tcp_hdr(skb)->check = + ~csum_tcpudp_magic(ip_hdr(skb)->saddr, + ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); + } else { + lso_info->lso_v2_transmit.ip_version = + NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6; + ipv6_hdr(skb)->payload_len = 0; + tcp_hdr(skb)->check = + ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, + &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); + } + lso_info->lso_v2_transmit.tcp_header_offset = hdr_offset; + lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size; do_send: /* Start filling in the page buffers with the rndis hdr */ @@ -652,10 +682,10 @@ static int netvsc_probe(struct hv_device *dev, net->netdev_ops = &device_ops; - /* TODO: Add GSO and Checksum offload */ - net->hw_features = NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_IP_CSUM; + net->hw_features = NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_IP_CSUM | + NETIF_F_TSO; net->features = NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_SG | NETIF_F_RXCSUM | - NETIF_F_IP_CSUM; + NETIF_F_IP_CSUM | NETIF_F_TSO; SET_ETHTOOL_OPS(net, ðtool_ops); SET_NETDEV_DEV(net, &dev->device); |