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RDMA/hns: Add trace for CMDQ dumping

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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: Junxian Huang <huangjunxian6@hisilicon.com>
Link: https://patch.msgid.link/20250421132750.1363348-7-huangjunxian6@hisilicon.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Junxian Huang 2025-04-21 21:27:50 +08:00 • committed by Leon Romanovsky
parent 2b11d33de2
commit 6bd18dabf1
2 changed files with 39 additions and 0 deletions
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4
drivers/infiniband/hw/hns/hns_roce_hw_v2.c
View file

@ -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)

35
drivers/infiniband/hw/hns/hns_roce_trace.h
View file

@ -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