Commit 02007e3d authored by Junxian Huang's avatar Junxian Huang Committed by Leon Romanovsky
Browse files

RDMA/hns: Add trace for flush CQE 



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: default avatarJunxian Huang <huangjunxian6@hisilicon.com>
Link: https://patch.msgid.link/20250421132750.1363348-2-huangjunxian6@hisilicon.com


Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
parent 685f9537

drivers/infiniband/hw/hns/hns_roce_device.h

+17 −0
Original line number Diff line number Diff line
@@ -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);

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

+5 −0
Original line number Diff line number Diff line
@@ -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);

drivers/infiniband/hw/hns/hns_roce_trace.h

0 → 100644
+50 −0
Original line number Diff line number Diff line 
/* 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>