Commit 6bd18dab authored by Junxian Huang's avatar Junxian Huang Committed by Leon Romanovsky
Browse files

RDMA/hns: Add trace for CMDQ dumping 



Add trace for CMDQ dumping.

Output example:
$ cat /sys/kernel/debug/tracing/trace
  tracer: nop

  entries-in-buffer/entries-written: 2/2   #P:128

                                 _-----=> irqs-off/BH-disabled
                               / _----=> need-resched
                               | / _---=> hardirq/softirq
                               || / _--=> preempt-depth
                               ||| / _-=> migrate-disable
                               |||| /     delay
            TASK-PID     CPU#  |||||  TIMESTAMP  FUNCTION
               | |         |   |||||     |         |
  kworker/u512:1-14003   [089] b..1. 50737.238304: hns_cmdq_req: 0000:bd:00.0 cmdq opcode:0x8500, flag:0x1, retval:0x0, data:{0x2,0x0,0x0,0xffff0000,0x32323232,0x0}

  kworker/u512:1-14003   [089] b..1. 50737.238316: hns_cmdq_resp: 0000:bd:00.0 cmdq opcode:0x8500, flag:0x2, retval:0x0, data:{0x2,0x0,0x0,0xffff0000,0x32323232,0x0}

Signed-off-by: default avatarJunxian Huang <huangjunxian6@hisilicon.com>
Link: https://patch.msgid.link/20250421132750.1363348-7-huangjunxian6@hisilicon.com


Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
parent 2b11d33d

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

+4 −0
Original line number Diff line number Diff line
@@ -1321,6 +1321,8 @@ static int __hns_roce_cmq_send_one(struct hns_roce_dev *hr_dev, 
	tail = csq->head;



	for (i = 0; i < num; i++) {

		trace_hns_cmdq_req(hr_dev, &desc[i]);



		csq->desc[csq->head++] = desc[i];

		if (csq->head == csq->desc_num)

			csq->head = 0;
@@ -1335,6 +1337,8 @@ static int __hns_roce_cmq_send_one(struct hns_roce_dev *hr_dev, 
	if (hns_roce_cmq_csq_done(hr_dev)) {

		ret = 0;

		for (i = 0; i < num; i++) {

			trace_hns_cmdq_resp(hr_dev, &csq->desc[tail]);



			/* check the result of hardware write back */

			desc_ret = le16_to_cpu(csq->desc[tail++].retval);

			if (tail == csq->desc_num)

drivers/infiniband/hw/hns/hns_roce_trace.h

+35 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <linux/tracepoint.h>

#include <linux/string_choices.h>

#include "hns_roce_device.h"

#include "hns_roce_hw_v2.h"



DECLARE_EVENT_CLASS(flush_head_template,

		    TP_PROTO(unsigned long qpn, u32 pi,
@@ -169,6 +170,40 @@ TRACE_EVENT(hns_buf_attr, 
		      __entry->region2_size, __entry->region2_hopnum)

);



DECLARE_EVENT_CLASS(cmdq,

		    TP_PROTO(struct hns_roce_dev *hr_dev,

			     struct hns_roce_cmq_desc *desc),

		    TP_ARGS(hr_dev, desc),



		    TP_STRUCT__entry(__string(dev_name, dev_name(hr_dev->dev))

				     __field(u16, opcode)

				     __field(u16, flag)

				     __field(u16, retval)

				     __array(__le32, data, 6)

		    ),



		    TP_fast_assign(__assign_str(dev_name);

				   __entry->opcode = le16_to_cpu(desc->opcode);

				   __entry->flag = le16_to_cpu(desc->flag);

				   __entry->retval = le16_to_cpu(desc->retval);

				   memcpy(__entry->data, desc->data, 6 * sizeof(__le32));

		    ),



		    TP_printk("%s cmdq opcode:0x%x, flag:0x%x, retval:0x%x, data:%s\n",

			      __get_str(dev_name), __entry->opcode,

			      __entry->flag, __entry->retval,

			      __print_array(__entry->data, 6, sizeof(__le32)))

);



DEFINE_EVENT(cmdq, hns_cmdq_req,

	     TP_PROTO(struct hns_roce_dev *hr_dev,

		      struct hns_roce_cmq_desc *desc),

	     TP_ARGS(hr_dev, desc));

DEFINE_EVENT(cmdq, hns_cmdq_resp,

	     TP_PROTO(struct hns_roce_dev *hr_dev,

		      struct hns_roce_cmq_desc *desc),

	     TP_ARGS(hr_dev, desc));



#endif /* __HNS_ROCE_TRACE_H */



#undef TRACE_INCLUDE_FILE