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Commit 77bf5487 authored by KY Srinivasan's avatar KY Srinivasan Committed by David S. Miller
Browse files

Drivers: net: hyperv: Enable large send offload 



Enable segmentation offload.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 08cd04bf

drivers/net/hyperv/hyperv_net.h

+40 −0
Original line number Diff line number Diff line
@@ -742,6 +742,10 @@ struct ndis_oject_header { 
#define NDIS_OFFLOAD_PARAMETERS_RX_ENABLED_TX_DISABLED 3

#define NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED 4



#define NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE	1

#define NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4	0

#define NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6	1



/*

 * New offload OIDs for NDIS 6

 */
@@ -804,12 +808,48 @@ struct ndis_tcp_ip_checksum_info { 
	};

};



struct ndis_tcp_lso_info {

	union {

		struct {

			u32 unused:30;

			u32 type:1;

			u32 reserved2:1;

		} transmit;

		struct {

			u32 mss:20;

			u32 tcp_header_offset:10;

			u32 type:1;

			u32 reserved2:1;

		} lso_v1_transmit;

		struct {

			u32 tcp_payload:30;

			u32 type:1;

			u32 reserved2:1;

		} lso_v1_transmit_complete;

		struct {

			u32 mss:20;

			u32 tcp_header_offset:10;

			u32 type:1;

			u32 ip_version:1;

		} lso_v2_transmit;

		struct {

			u32 reserved:30;

			u32 type:1;

			u32 reserved2:1;

		} lso_v2_transmit_complete;

		u32  value;

	};

};



#define NDIS_VLAN_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \

		sizeof(struct ndis_pkt_8021q_info))



#define NDIS_CSUM_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \

		sizeof(struct ndis_tcp_ip_checksum_info))



#define NDIS_LSO_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \

		sizeof(struct ndis_tcp_lso_info))



/* Format of Information buffer passed in a SetRequest for the OID */

/* OID_GEN_RNDIS_CONFIG_PARAMETER. */

struct rndis_config_parameter_info {

drivers/net/hyperv/netvsc_drv.c

+34 −4
Original line number Diff line number Diff line
@@ -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, &ethtool_ops);

	SET_NETDEV_DEV(net, &dev->device);