hv_netvsc: add trace points

This adds tracepoints to the driver which has proved useful in
debugging startup and shutdown race conditions.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 25 insertions, 1 deletions

diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index 0265d703eb03..aa95e81af6e5 100644
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -36,6 +36,7 @@
 #include <asm/sync_bitops.h>
 
 #include "hyperv_net.h"
+#include "netvsc_trace.h"
 
 /*
  * Switch the data path from the synthetic interface to the VF
@@ -57,6 +58,8 @@ void netvsc_switch_datapath(struct net_device *ndev, bool vf)
 		init_pkt->msg.v4_msg.active_dp.active_datapath =
 			NVSP_DATAPATH_SYNTHETIC;
 
+	trace_nvsp_send(ndev, init_pkt);
+
 	vmbus_sendpacket(dev->channel, init_pkt,
 			       sizeof(struct nvsp_message),
 			       (unsigned long)init_pkt,
@@ -124,6 +127,8 @@ static void netvsc_revoke_buf(struct hv_device *device,
 		revoke_packet->msg.v1_msg.
 		revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID;
 
+		trace_nvsp_send(ndev, revoke_packet);
+
 		ret = vmbus_sendpacket(device->channel,
 				       revoke_packet,
 				       sizeof(struct nvsp_message),
@@ -164,6 +169,8 @@ static void netvsc_revoke_buf(struct hv_device *device,
 		revoke_packet->msg.v1_msg.revoke_send_buf.id =
 			NETVSC_SEND_BUFFER_ID;
 
+		trace_nvsp_send(ndev, revoke_packet);
+
 		ret = vmbus_sendpacket(device->channel,
 				       revoke_packet,
 				       sizeof(struct nvsp_message),
@@ -305,6 +312,8 @@ static int netvsc_init_buf(struct hv_device *device,
 	init_packet->msg.v1_msg.
 		send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID;
 
+	trace_nvsp_send(ndev, init_packet);
+
 	/* Send the gpadl notification request */
 	ret = vmbus_sendpacket(device->channel, init_packet,
 			       sizeof(struct nvsp_message),
@@ -384,6 +393,8 @@ static int netvsc_init_buf(struct hv_device *device,
 		net_device->send_buf_gpadl_handle;
 	init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID;
 
+	trace_nvsp_send(ndev, init_packet);
+
 	/* Send the gpadl notification request */
 	ret = vmbus_sendpacket(device->channel, init_packet,
 			       sizeof(struct nvsp_message),
@@ -452,6 +463,8 @@ static int negotiate_nvsp_ver(struct hv_device *device,
 	init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver;
 	init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver;
 
+	trace_nvsp_send(ndev, init_packet);
+
 	/* Send the init request */
 	ret = vmbus_sendpacket(device->channel, init_packet,
 			       sizeof(struct nvsp_message),
@@ -484,6 +497,8 @@ static int negotiate_nvsp_ver(struct hv_device *device,
 		init_packet->msg.v2_msg.send_ndis_config.capability.teaming = 1;
 	}
 
+	trace_nvsp_send(ndev, init_packet);
+
 	ret = vmbus_sendpacket(device->channel, init_packet,
 				sizeof(struct nvsp_message),
 				(unsigned long)init_packet,
@@ -496,6 +511,7 @@ static int netvsc_connect_vsp(struct hv_device *device,
 			      struct netvsc_device *net_device,
 			      const struct netvsc_device_info *device_info)
 {
+	struct net_device *ndev = hv_get_drvdata(device);
 	static const u32 ver_list[] = {
 		NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2,
 		NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5
@@ -536,6 +552,8 @@ static int netvsc_connect_vsp(struct hv_device *device,
 		send_ndis_ver.ndis_minor_ver =
 				ndis_version & 0xFFFF;
 
+	trace_nvsp_send(ndev, init_packet);
+
 	/* Send the init request */
 	ret = vmbus_sendpacket(device->channel, init_packet,
 				sizeof(struct nvsp_message),
@@ -747,7 +765,7 @@ static inline int netvsc_send_pkt(
 	struct sk_buff *skb)
 {
 	struct nvsp_message nvmsg;
-	struct nvsp_1_message_send_rndis_packet * const rpkt =
+	struct nvsp_1_message_send_rndis_packet *rpkt =
 		&nvmsg.msg.v1_msg.send_rndis_pkt;
 	struct netvsc_channel * const nvchan =
 		&net_device->chan_table[packet->q_idx];
@@ -776,6 +794,8 @@ static inline int netvsc_send_pkt(
 	if (out_channel->rescind)
 		return -ENODEV;
 
+	trace_nvsp_send_pkt(ndev, out_channel, rpkt);
+
 	if (packet->page_buf_cnt) {
 		if (packet->cp_partial)
 			pb += packet->rmsg_pgcnt;
@@ -1079,6 +1099,8 @@ static int netvsc_receive(struct net_device *ndev,
 			+ vmxferpage_packet->ranges[i].byte_offset;
 		u32 buflen = vmxferpage_packet->ranges[i].byte_count;
 
+		trace_rndis_recv(ndev, q_idx, data);
+
 		/* Pass it to the upper layer */
 		status = rndis_filter_receive(ndev, net_device,
 					      channel, data, buflen);
@@ -1143,6 +1165,8 @@ static int netvsc_process_raw_pkt(struct hv_device *device,
 	struct net_device_context *net_device_ctx = netdev_priv(ndev);
 	struct nvsp_message *nvmsg = hv_pkt_data(desc);
 
+	trace_nvsp_recv(ndev, channel, nvmsg);
+
 	switch (desc->type) {
 	case VM_PKT_COMP:
 		netvsc_send_completion(net_device, channel, device,