@@ -119,6 +119,7 @@ struct ndis_recv_scale_param { /* NDIS_RECEIVE_SCALE_PARAMETERS */
/* Fwd declaration */
struct ndis_tcp_ip_checksum_info;
+struct ndis_pkt_8021q_info;
/*
* Represent netvsc packet which contains 1 RNDIS and 1 ethernet frame
@@ -186,12 +187,11 @@ int netvsc_send(struct hv_device *device,
struct sk_buff *skb);
void netvsc_linkstatus_callback(struct hv_device *device_obj,
struct rndis_message *resp);
-int netvsc_recv_callback(struct hv_device *device_obj,
- struct hv_netvsc_packet *packet,
- void **data,
- struct ndis_tcp_ip_checksum_info *csum_info,
- struct vmbus_channel *channel,
- u16 vlan_tci);
+int netvsc_recv_callback(struct net_device *net,
+ struct vmbus_channel *channel,
+ void *data, u32 len,
+ const struct ndis_tcp_ip_checksum_info *csum_info,
+ const struct ndis_pkt_8021q_info *vlan);
void netvsc_channel_cb(void *context);
int rndis_filter_open(struct netvsc_device *nvdev);
int rndis_filter_close(struct netvsc_device *nvdev);
@@ -200,10 +200,11 @@ int rndis_filter_device_add(struct hv_device *dev,
void rndis_filter_device_remove(struct hv_device *dev);
int rndis_filter_set_rss_param(struct rndis_device *rdev,
const u8 *key, int num_queue);
-int rndis_filter_receive(struct hv_device *dev,
- struct hv_netvsc_packet *pkt,
- void **data,
- struct vmbus_channel *channel);
+int rndis_filter_receive(struct net_device *ndev,
+ struct netvsc_device *net_dev,
+ struct hv_device *dev,
+ struct vmbus_channel *channel,
+ void *data, u32 buflen);
int rndis_filter_set_packet_filter(struct rndis_device *dev, u32 new_filter);
int rndis_filter_set_device_mac(struct net_device *ndev, char *mac);
@@ -1095,51 +1095,35 @@ static inline struct recv_comp_data *get_recv_comp_slot(
return rcd;
}
-static void netvsc_receive(struct netvsc_device *net_device,
- struct vmbus_channel *channel,
- struct hv_device *device,
- struct vmpacket_descriptor *packet)
+static void netvsc_receive(struct net_device *ndev,
+ struct netvsc_device *net_device,
+ struct net_device_context *net_device_ctx,
+ struct hv_device *device,
+ struct vmbus_channel *channel,
+ struct vmtransfer_page_packet_header *vmxferpage_packet,
+ struct nvsp_message *nvsp)
{
- struct vmtransfer_page_packet_header *vmxferpage_packet;
- struct nvsp_message *nvsp_packet;
- struct hv_netvsc_packet nv_pkt;
- struct hv_netvsc_packet *netvsc_packet = &nv_pkt;
+ char *recv_buf = net_device->recv_buf;
u32 status = NVSP_STAT_SUCCESS;
int i;
int count = 0;
- struct net_device *ndev = hv_get_drvdata(device);
- void *data;
int ret;
struct recv_comp_data *rcd;
u16 q_idx = channel->offermsg.offer.sub_channel_index;
- /*
- * All inbound packets other than send completion should be xfer page
- * packet
- */
- if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) {
- netdev_err(ndev, "Unknown packet type received - %d\n",
- packet->type);
- return;
- }
-
- nvsp_packet = (struct nvsp_message *)((unsigned long)packet +
- (packet->offset8 << 3));
-
/* Make sure this is a valid nvsp packet */
- if (nvsp_packet->hdr.msg_type !=
- NVSP_MSG1_TYPE_SEND_RNDIS_PKT) {
- netdev_err(ndev, "Unknown nvsp packet type received-"
- " %d\n", nvsp_packet->hdr.msg_type);
+ if (unlikely(nvsp->hdr.msg_type != NVSP_MSG1_TYPE_SEND_RNDIS_PKT)) {
+ netif_err(net_device_ctx, rx_err, ndev,
+ "Unknown nvsp packet type received %u\n",
+ nvsp->hdr.msg_type);
return;
}
- vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet;
-
- if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) {
- netdev_err(ndev, "Invalid xfer page set id - "
- "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID,
- vmxferpage_packet->xfer_pageset_id);
+ if (unlikely(vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID)) {
+ netif_err(net_device_ctx, rx_err, ndev,
+ "Invalid xfer page set id - expecting %x got %x\n",
+ NETVSC_RECEIVE_BUFFER_ID,
+ vmxferpage_packet->xfer_pageset_id);
return;
}
@@ -1147,15 +1131,13 @@ static void netvsc_receive(struct netvsc_device *net_device,
/* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */
for (i = 0; i < count; i++) {
- /* Initialize the netvsc packet */
- data = (void *)((unsigned long)net_device->
- recv_buf + vmxferpage_packet->ranges[i].byte_offset);
- netvsc_packet->total_data_buflen =
- vmxferpage_packet->ranges[i].byte_count;
+ void *data = recv_buf
+ + vmxferpage_packet->ranges[i].byte_offset;
+ u32 buflen = vmxferpage_packet->ranges[i].byte_count;
/* Pass it to the upper layer */
- status = rndis_filter_receive(device, netvsc_packet, &data,
- channel);
+ status = rndis_filter_receive(ndev, net_device, device,
+ channel, data, buflen);
}
if (!net_device->chan_table[q_idx].mrc.buf) {
@@ -1234,11 +1216,10 @@ static void netvsc_process_raw_pkt(struct hv_device *device,
u64 request_id,
struct vmpacket_descriptor *desc)
{
- struct nvsp_message *nvmsg;
struct net_device_context *net_device_ctx = netdev_priv(ndev);
-
- nvmsg = (struct nvsp_message *)((unsigned long)
- desc + (desc->offset8 << 3));
+ struct nvsp_message *nvmsg
+ = (struct nvsp_message *)((unsigned long)desc
+ + (desc->offset8 << 3));
switch (desc->type) {
case VM_PKT_COMP:
@@ -1246,7 +1227,10 @@ static void netvsc_process_raw_pkt(struct hv_device *device,
break;
case VM_PKT_DATA_USING_XFER_PAGES:
- netvsc_receive(net_device, channel, device, desc);
+ netvsc_receive(ndev, net_device, net_device_ctx,
+ device, channel,
+ (struct vmtransfer_page_packet_header *)desc,
+ nvmsg);
break;
case VM_PKT_DATA_INBAND:
@@ -596,13 +596,13 @@ void netvsc_linkstatus_callback(struct hv_device *device_obj,
}
static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net,
- struct hv_netvsc_packet *packet,
- struct ndis_tcp_ip_checksum_info *csum_info,
- void *data, u16 vlan_tci)
+ const struct ndis_tcp_ip_checksum_info *csum_info,
+ const struct ndis_pkt_8021q_info *vlan,
+ void *data, u32 buflen)
{
struct sk_buff *skb;
- skb = netdev_alloc_skb_ip_align(net, packet->total_data_buflen);
+ skb = netdev_alloc_skb_ip_align(net, buflen);
if (!skb)
return skb;
@@ -610,8 +610,7 @@ static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net,
* Copy to skb. This copy is needed here since the memory pointed by
* hv_netvsc_packet cannot be deallocated
*/
- memcpy(skb_put(skb, packet->total_data_buflen), data,
- packet->total_data_buflen);
+ memcpy(skb_put(skb, buflen), data, buflen);
skb->protocol = eth_type_trans(skb, net);
@@ -628,9 +627,12 @@ static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net,
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
- if (vlan_tci & VLAN_TAG_PRESENT)
+ if (vlan) {
+ u16 vlan_tci = vlan->vlanid | (vlan->pri << VLAN_PRIO_SHIFT);
+
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
vlan_tci);
+ }
return skb;
}
@@ -639,14 +641,12 @@ static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net,
* netvsc_recv_callback - Callback when we receive a packet from the
* "wire" on the specified device.
*/
-int netvsc_recv_callback(struct hv_device *device_obj,
- struct hv_netvsc_packet *packet,
- void **data,
- struct ndis_tcp_ip_checksum_info *csum_info,
- struct vmbus_channel *channel,
- u16 vlan_tci)
+int netvsc_recv_callback(struct net_device *net,
+ struct vmbus_channel *channel,
+ void *data, u32 len,
+ const struct ndis_tcp_ip_checksum_info *csum_info,
+ const struct ndis_pkt_8021q_info *vlan)
{
- struct net_device *net = hv_get_drvdata(device_obj);
struct net_device_context *net_device_ctx = netdev_priv(net);
struct net_device *vf_netdev;
struct sk_buff *skb;
@@ -668,7 +668,7 @@ int netvsc_recv_callback(struct hv_device *device_obj,
net = vf_netdev;
/* Allocate a skb - TODO direct I/O to pages? */
- skb = netvsc_alloc_recv_skb(net, packet, csum_info, *data, vlan_tci);
+ skb = netvsc_alloc_recv_skb(net, csum_info, vlan, data, len);
if (unlikely(!skb)) {
++net->stats.rx_dropped;
rcu_read_unlock();
@@ -687,7 +687,7 @@ int netvsc_recv_callback(struct hv_device *device_obj,
rx_stats = this_cpu_ptr(net_device_ctx->rx_stats);
u64_stats_update_begin(&rx_stats->syncp);
rx_stats->packets++;
- rx_stats->bytes += packet->total_data_buflen;
+ rx_stats->bytes += len;
if (skb->pkt_type == PACKET_BROADCAST)
++rx_stats->broadcast;
@@ -132,7 +132,7 @@ static void put_rndis_request(struct rndis_device *dev,
}
static void dump_rndis_message(struct hv_device *hv_dev,
- struct rndis_message *rndis_msg)
+ const struct rndis_message *rndis_msg)
{
struct net_device *netdev = hv_get_drvdata(hv_dev);
@@ -347,102 +347,78 @@ static inline void *rndis_get_ppi(struct rndis_packet *rpkt, u32 type)
return NULL;
}
-static int rndis_filter_receive_data(struct rndis_device *dev,
- struct rndis_message *msg,
- struct hv_netvsc_packet *pkt,
- void **data,
- struct vmbus_channel *channel)
+static int rndis_filter_receive_data(struct net_device *ndev,
+ struct rndis_device *dev,
+ struct rndis_message *msg,
+ struct vmbus_channel *channel,
+ void *data, u32 data_buflen)
{
- struct rndis_packet *rndis_pkt;
+ struct rndis_packet *rndis_pkt = &msg->msg.pkt;
+ const struct ndis_tcp_ip_checksum_info *csum_info;
+ const struct ndis_pkt_8021q_info *vlan;
u32 data_offset;
- struct ndis_pkt_8021q_info *vlan;
- struct ndis_tcp_ip_checksum_info *csum_info;
- u16 vlan_tci = 0;
- struct net_device_context *net_device_ctx = netdev_priv(dev->ndev);
-
- rndis_pkt = &msg->msg.pkt;
/* Remove the rndis header and pass it back up the stack */
data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
- pkt->total_data_buflen -= data_offset;
+ data_buflen -= data_offset;
/*
* Make sure we got a valid RNDIS message, now total_data_buflen
* should be the data packet size plus the trailer padding size
*/
- if (pkt->total_data_buflen < rndis_pkt->data_len) {
+ if (unlikely(data_buflen < rndis_pkt->data_len)) {
netdev_err(dev->ndev, "rndis message buffer "
"overflow detected (got %u, min %u)"
"...dropping this message!\n",
- pkt->total_data_buflen, rndis_pkt->data_len);
+ data_buflen, rndis_pkt->data_len);
return NVSP_STAT_FAIL;
}
+ vlan = rndis_get_ppi(rndis_pkt, IEEE_8021Q_INFO);
+
/*
* Remove the rndis trailer padding from rndis packet message
* rndis_pkt->data_len tell us the real data length, we only copy
* the data packet to the stack, without the rndis trailer padding
*/
- pkt->total_data_buflen = rndis_pkt->data_len;
- *data = (void *)((unsigned long)(*data) + data_offset);
-
- vlan = rndis_get_ppi(rndis_pkt, IEEE_8021Q_INFO);
- if (vlan) {
- vlan_tci = VLAN_TAG_PRESENT | vlan->vlanid |
- (vlan->pri << VLAN_PRIO_SHIFT);
- }
-
+ data = (void *)((unsigned long)data + data_offset);
csum_info = rndis_get_ppi(rndis_pkt, TCPIP_CHKSUM_PKTINFO);
- return netvsc_recv_callback(net_device_ctx->device_ctx, pkt, data,
- csum_info, channel, vlan_tci);
+ return netvsc_recv_callback(ndev, channel,
+ data, rndis_pkt->data_len,
+ csum_info, vlan);
}
-int rndis_filter_receive(struct hv_device *dev,
- struct hv_netvsc_packet *pkt,
- void **data,
- struct vmbus_channel *channel)
+int rndis_filter_receive(struct net_device *ndev,
+ struct netvsc_device *net_dev,
+ struct hv_device *dev,
+ struct vmbus_channel *channel,
+ void *data, u32 buflen)
{
- struct net_device *ndev = hv_get_drvdata(dev);
struct net_device_context *net_device_ctx = netdev_priv(ndev);
- struct netvsc_device *net_dev = net_device_ctx->nvdev;
- struct rndis_device *rndis_dev;
- struct rndis_message *rndis_msg;
- int ret = 0;
-
- if (!net_dev) {
- ret = NVSP_STAT_FAIL;
- goto exit;
- }
+ struct rndis_device *rndis_dev = net_dev->extension;
+ struct rndis_message *rndis_msg = data;
/* Make sure the rndis device state is initialized */
- if (!net_dev->extension) {
- netdev_err(ndev, "got rndis message but no rndis device - "
- "dropping this message!\n");
- ret = NVSP_STAT_FAIL;
- goto exit;
+ if (unlikely(!rndis_dev)) {
+ netif_err(net_device_ctx, rx_err, ndev,
+ "got rndis message but no rndis device!\n");
+ return NVSP_STAT_FAIL;
}
- rndis_dev = (struct rndis_device *)net_dev->extension;
- if (rndis_dev->state == RNDIS_DEV_UNINITIALIZED) {
- netdev_err(ndev, "got rndis message but rndis device "
- "uninitialized...dropping this message!\n");
- ret = NVSP_STAT_FAIL;
- goto exit;
+ if (unlikely(rndis_dev->state == RNDIS_DEV_UNINITIALIZED)) {
+ netif_err(net_device_ctx, rx_err, ndev,
+ "got rndis message uninitialized\n");
+ return NVSP_STAT_FAIL;
}
- rndis_msg = *data;
-
- if (netif_msg_rx_err(net_device_ctx))
+ if (netif_msg_rx_status(net_device_ctx))
dump_rndis_message(dev, rndis_msg);
switch (rndis_msg->ndis_msg_type) {
case RNDIS_MSG_PACKET:
- /* data msg */
- ret = rndis_filter_receive_data(rndis_dev, rndis_msg, pkt,
- data, channel);
- break;
-
+ return rndis_filter_receive_data(ndev, rndis_dev, rndis_msg,
+ channel, data, buflen);
case RNDIS_MSG_INIT_C:
case RNDIS_MSG_QUERY_C:
case RNDIS_MSG_SET_C:
@@ -462,8 +438,7 @@ int rndis_filter_receive(struct hv_device *dev,
break;
}
-exit:
- return ret;
+ return 0;
}
static int rndis_filter_query_device(struct rndis_device *dev, u32 oid,
Do manual optimizations of receive path: - remove checks for impossible conditions (but keep checks for bad data from host) - pass argument down, rather than having callee recompute what is already known - remove indirection about receive buffer datalength - remove dependence on VLAN_TAG_PRESENCE - use _hot/_cold and likely/unlikely Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> --- drivers/net/hyperv/hyperv_net.h | 21 +++++---- drivers/net/hyperv/netvsc.c | 74 ++++++++++++----------------- drivers/net/hyperv/netvsc_drv.c | 32 ++++++------- drivers/net/hyperv/rndis_filter.c | 99 +++++++++++++++------------------------ 4 files changed, 93 insertions(+), 133 deletions(-)