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RDMA/hns: Add trace for flush CQE

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Add trace to print the producer index of QP when triggering flush CQE.

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
               | |         |   |||||     |         |
      ib_send_bw-11474   [075] d..1.  2393.434738: hns_sq_flush_cqe: SQ 0x2 flush head 0xb5c7.
      ib_send_bw-11474   [075] d..1.  2393.434739: hns_rq_flush_cqe: RQ 0x2 flush head 0.

Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
Link: https://patch.msgid.link/20250421132750.1363348-2-huangjunxian6@hisilicon.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Junxian Huang 2025-04-21 21:27:45 +08:00 • committed by Leon Romanovsky
parent 685f9537a7
commit 02007e3ddc
3 changed files with 72 additions and 0 deletions
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17
drivers/infiniband/hw/hns/hns_roce_device.h
View file

@ -1027,6 +1027,23 @@ struct hns_roce_dev {
atomic64_t *dfx_cnt;
};
enum hns_roce_trace_type {
TRACE_SQ,
TRACE_RQ,
};
static inline const char *trace_type_to_str(enum hns_roce_trace_type type)
{
switch (type) {
case TRACE_SQ:
return "SQ";
case TRACE_RQ:
return "RQ";
default:
return "UNKNOWN";
}
}
static inline struct hns_roce_dev *to_hr_dev(struct ib_device *ib_dev)
{
return container_of(ib_dev, struct hns_roce_dev, ib_dev);

5
drivers/infiniband/hw/hns/hns_roce_hw_v2.c
View file

@ -50,6 +50,9 @@
#include "hns_roce_hem.h"
#include "hns_roce_hw_v2.h"
#define CREATE_TRACE_POINTS
#include "hns_roce_trace.h"
enum {
CMD_RST_PRC_OTHERS,
CMD_RST_PRC_SUCCESS,
@ -5312,6 +5315,7 @@ static void v2_set_flushed_fields(struct ib_qp *ibqp,
return;
spin_lock_irqsave(&hr_qp->sq.lock, sq_flag);
trace_hns_sq_flush_cqe(hr_qp->qpn, hr_qp->sq.head, TRACE_SQ);
hr_reg_write(context, QPC_SQ_PRODUCER_IDX, hr_qp->sq.head);
hr_reg_clear(qpc_mask, QPC_SQ_PRODUCER_IDX);
hr_qp->state = IB_QPS_ERR;
@ -5321,6 +5325,7 @@ static void v2_set_flushed_fields(struct ib_qp *ibqp,
return;
spin_lock_irqsave(&hr_qp->rq.lock, rq_flag);
trace_hns_rq_flush_cqe(hr_qp->qpn, hr_qp->rq.head, TRACE_RQ);
hr_reg_write(context, QPC_RQ_PRODUCER_IDX, hr_qp->rq.head);
hr_reg_clear(qpc_mask, QPC_RQ_PRODUCER_IDX);
spin_unlock_irqrestore(&hr_qp->rq.lock, rq_flag);

50
drivers/infiniband/hw/hns/hns_roce_trace.h Normal file
View file

@ -0,0 +1,50 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2025 Hisilicon Limited.
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM hns_roce
#if !defined(__HNS_ROCE_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
#define __HNS_ROCE_TRACE_H
#include <linux/tracepoint.h>
#include "hns_roce_device.h"
DECLARE_EVENT_CLASS(flush_head_template,
TP_PROTO(unsigned long qpn, u32 pi,
enum hns_roce_trace_type type),
TP_ARGS(qpn, pi, type),
TP_STRUCT__entry(__field(unsigned long, qpn)
__field(u32, pi)
__field(enum hns_roce_trace_type, type)
),
TP_fast_assign(__entry->qpn = qpn;
__entry->pi = pi;
__entry->type = type;
),
TP_printk("%s 0x%lx flush head 0x%x.",
trace_type_to_str(__entry->type),
__entry->qpn, __entry->pi)
);
DEFINE_EVENT(flush_head_template, hns_sq_flush_cqe,
TP_PROTO(unsigned long qpn, u32 pi,
enum hns_roce_trace_type type),
TP_ARGS(qpn, pi, type));
DEFINE_EVENT(flush_head_template, hns_rq_flush_cqe,
TP_PROTO(unsigned long qpn, u32 pi,
enum hns_roce_trace_type type),
TP_ARGS(qpn, pi, type));
#endif /* __HNS_ROCE_TRACE_H */
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_FILE hns_roce_trace
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#include <trace/define_trace.h>