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hyperv: Add hash value into RNDIS Per-packet info

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It passes the hash value as the RNDIS Per-packet info to the Hyper-V host,
so that the send completion notices can be spread across multiple channels.
MS-TFS: 140273

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Haiyang Zhang 2014-05-21 12:55:39 -07:00 committed by David S. Miller
parent 915f15ca52
commit 307f099520
2 changed files with 18 additions and 4 deletions
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4
drivers/net/hyperv/hyperv_net.h
View File

@ -791,6 +791,7 @@ enum ndis_per_pkt_info_type {
IEEE_8021Q_INFO,
ORIGINAL_PKTINFO,
PACKET_CANCEL_ID,
NBL_HASH_VALUE = PACKET_CANCEL_ID,
ORIGINAL_NET_BUFLIST,
CACHED_NET_BUFLIST,
SHORT_PKT_PADINFO,
@ -937,6 +938,9 @@ struct ndis_tcp_lso_info {
#define NDIS_LSO_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
sizeof(struct ndis_tcp_lso_info))
#define NDIS_HASH_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
sizeof(u32))
/* Format of Information buffer passed in a SetRequest for the OID */
/* OID_GEN_RNDIS_CONFIG_PARAMETER. */
struct rndis_config_parameter_info {

18
drivers/net/hyperv/netvsc_drv.c
View File

@ -224,9 +224,11 @@ static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb,
if (nvsc_dev == NULL || ndev->real_num_tx_queues <= 1)
return 0;
if (netvsc_set_hash(&hash, skb))
if (netvsc_set_hash(&hash, skb)) {
q_idx = nvsc_dev->send_table[hash % VRSS_SEND_TAB_SIZE] %
ndev->real_num_tx_queues;
skb_set_hash(skb, hash, PKT_HASH_TYPE_L3);
}
return q_idx;
}
@ -384,6 +386,7 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
struct ndis_tcp_lso_info *lso_info;
int hdr_offset;
u32 net_trans_info;
u32 hash;
/* We will atmost need two pages to describe the rndis
@ -402,9 +405,8 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
packet = kzalloc(sizeof(struct hv_netvsc_packet) +
(num_data_pgs * sizeof(struct hv_page_buffer)) +
sizeof(struct rndis_message) +
NDIS_VLAN_PPI_SIZE +
NDIS_CSUM_PPI_SIZE +
NDIS_LSO_PPI_SIZE, GFP_ATOMIC);
NDIS_VLAN_PPI_SIZE + NDIS_CSUM_PPI_SIZE +
NDIS_LSO_PPI_SIZE + NDIS_HASH_PPI_SIZE, GFP_ATOMIC);
if (!packet) {
/* out of memory, drop packet */
netdev_err(net, "unable to allocate hv_netvsc_packet\n");
@ -443,6 +445,14 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet);
hash = skb_get_hash_raw(skb);
if (hash != 0 && net->real_num_tx_queues > 1) {
rndis_msg_size += NDIS_HASH_PPI_SIZE;
ppi = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE,
NBL_HASH_VALUE);
*(u32 *)((void *)ppi + ppi->ppi_offset) = hash;
}
if (isvlan) {
struct ndis_pkt_8021q_info *vlan;