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Commit 7962fc37 authored by Baolin Wang's avatar Baolin Wang Committed by Ulf Hansson
Browse files

mmc: core: Provide tracepoints for request processing 



This patch provides some tracepoints for the lifecycle of a mmc request
from starting to completion to help with performance analysis of MMC
subsystem.

Signed-off-by: default avatarBaolin Wang <baolin.wang@linaro.org>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 1ca4d359

drivers/mmc/core/core.c

+7 −0
Original line number Diff line number Diff line
@@ -36,6 +36,9 @@ 
#include <linux/mmc/sd.h>

#include <linux/mmc/slot-gpio.h>



#define CREATE_TRACE_POINTS

#include <trace/events/mmc.h>



#include "core.h"

#include "bus.h"

#include "host.h"
@@ -140,6 +143,8 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) 
			cmd->retries = 0;

	}



	trace_mmc_request_done(host, mrq);



	if (err && cmd->retries && !mmc_card_removed(host->card)) {

		/*

		 * Request starter must handle retries - see
@@ -215,6 +220,8 @@ static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) 
		}

	}



	trace_mmc_request_start(host, mrq);



	host->ops->request(host, mrq);

}

include/trace/events/mmc.h

0 → 100644
+182 −0
Original line number Diff line number Diff line 
#undef TRACE_SYSTEM

#define TRACE_SYSTEM mmc



#if !defined(_TRACE_MMC_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_MMC_H



#include <linux/blkdev.h>

#include <linux/mmc/core.h>

#include <linux/mmc/host.h>

#include <linux/tracepoint.h>



TRACE_EVENT(mmc_request_start,



	TP_PROTO(struct mmc_host *host, struct mmc_request *mrq),



	TP_ARGS(host, mrq),



	TP_STRUCT__entry(

		__field(u32,			cmd_opcode)

		__field(u32,			cmd_arg)

		__field(unsigned int,		cmd_flags)

		__field(unsigned int,		cmd_retries)

		__field(u32,			stop_opcode)

		__field(u32,			stop_arg)

		__field(unsigned int,		stop_flags)

		__field(unsigned int,		stop_retries)

		__field(u32,			sbc_opcode)

		__field(u32,			sbc_arg)

		__field(unsigned int,		sbc_flags)

		__field(unsigned int,		sbc_retries)

		__field(unsigned int,		blocks)

		__field(unsigned int,		blksz)

		__field(unsigned int,		data_flags)

		__field(unsigned int,		can_retune)

		__field(unsigned int,		doing_retune)

		__field(unsigned int,		retune_now)

		__field(int,			need_retune)

		__field(int,			hold_retune)

		__field(unsigned int,		retune_period)

		__field(struct mmc_request *,	mrq)

		__string(name,			mmc_hostname(host))

	),



	TP_fast_assign(

		__entry->cmd_opcode = mrq->cmd->opcode;

		__entry->cmd_arg = mrq->cmd->arg;

		__entry->cmd_flags = mrq->cmd->flags;

		__entry->cmd_retries = mrq->cmd->retries;

		__entry->stop_opcode = mrq->stop ? mrq->stop->opcode : 0;

		__entry->stop_arg = mrq->stop ? mrq->stop->arg : 0;

		__entry->stop_flags = mrq->stop ? mrq->stop->flags : 0;

		__entry->stop_retries = mrq->stop ? mrq->stop->retries : 0;

		__entry->sbc_opcode = mrq->sbc ? mrq->sbc->opcode : 0;

		__entry->sbc_arg = mrq->sbc ? mrq->sbc->arg : 0;

		__entry->sbc_flags = mrq->sbc ? mrq->sbc->flags : 0;

		__entry->sbc_retries = mrq->sbc ? mrq->sbc->retries : 0;

		__entry->blksz = mrq->data ? mrq->data->blksz : 0;

		__entry->blocks = mrq->data ? mrq->data->blocks : 0;

		__entry->data_flags = mrq->data ? mrq->data->flags : 0;

		__entry->can_retune = host->can_retune;

		__entry->doing_retune = host->doing_retune;

		__entry->retune_now = host->retune_now;

		__entry->need_retune = host->need_retune;

		__entry->hold_retune = host->hold_retune;

		__entry->retune_period = host->retune_period;

		__assign_str(name, mmc_hostname(host));

		__entry->mrq = mrq;

	),



	TP_printk("%s: start struct mmc_request[%p]: "

		  "cmd_opcode=%u cmd_arg=0x%x cmd_flags=0x%x cmd_retries=%u "

		  "stop_opcode=%u stop_arg=0x%x stop_flags=0x%x stop_retries=%u "

		  "sbc_opcode=%u sbc_arg=0x%x sbc_flags=0x%x sbc_retires=%u "

		  "blocks=%u block_size=%u data_flags=0x%x "

		  "can_retune=%u doing_retune=%u retune_now=%u "

		  "need_retune=%d hold_retune=%d retune_period=%u",

		  __get_str(name), __entry->mrq,

		  __entry->cmd_opcode, __entry->cmd_arg,

		  __entry->cmd_flags, __entry->cmd_retries,

		  __entry->stop_opcode, __entry->stop_arg,

		  __entry->stop_flags, __entry->stop_retries,

		  __entry->sbc_opcode, __entry->sbc_arg,

		  __entry->sbc_flags, __entry->sbc_retries,

		  __entry->blocks, __entry->blksz, __entry->data_flags,

		  __entry->can_retune, __entry->doing_retune,

		  __entry->retune_now, __entry->need_retune,

		  __entry->hold_retune, __entry->retune_period)

);



TRACE_EVENT(mmc_request_done,



	TP_PROTO(struct mmc_host *host, struct mmc_request *mrq),



	TP_ARGS(host, mrq),



	TP_STRUCT__entry(

		__field(u32,			cmd_opcode)

		__field(int,			cmd_err)

		__array(u32,			cmd_resp,	4)

		__field(unsigned int,		cmd_retries)

		__field(u32,			stop_opcode)

		__field(int,			stop_err)

		__array(u32,			stop_resp,	4)

		__field(unsigned int,		stop_retries)

		__field(u32,			sbc_opcode)

		__field(int,			sbc_err)

		__array(u32,			sbc_resp,	4)

		__field(unsigned int,		sbc_retries)

		__field(unsigned int,		bytes_xfered)

		__field(int,			data_err)

		__field(unsigned int,		can_retune)

		__field(unsigned int,		doing_retune)

		__field(unsigned int,		retune_now)

		__field(int,			need_retune)

		__field(int,			hold_retune)

		__field(unsigned int,		retune_period)

		__field(struct mmc_request *,	mrq)

		__string(name,			mmc_hostname(host))

	),



	TP_fast_assign(

		__entry->cmd_opcode = mrq->cmd->opcode;

		__entry->cmd_err = mrq->cmd->error;

		memcpy(__entry->cmd_resp, mrq->cmd->resp, 4);

		__entry->cmd_retries = mrq->cmd->retries;

		__entry->stop_opcode = mrq->stop ? mrq->stop->opcode : 0;

		__entry->stop_err = mrq->stop ? mrq->stop->error : 0;

		__entry->stop_resp[0] = mrq->stop ? mrq->stop->resp[0] : 0;

		__entry->stop_resp[1] = mrq->stop ? mrq->stop->resp[1] : 0;

		__entry->stop_resp[2] = mrq->stop ? mrq->stop->resp[2] : 0;

		__entry->stop_resp[3] = mrq->stop ? mrq->stop->resp[3] : 0;

		__entry->stop_retries = mrq->stop ? mrq->stop->retries : 0;

		__entry->sbc_opcode = mrq->sbc ? mrq->sbc->opcode : 0;

		__entry->sbc_err = mrq->sbc ? mrq->sbc->error : 0;

		__entry->sbc_resp[0] = mrq->sbc ? mrq->sbc->resp[0] : 0;

		__entry->sbc_resp[1] = mrq->sbc ? mrq->sbc->resp[1] : 0;

		__entry->sbc_resp[2] = mrq->sbc ? mrq->sbc->resp[2] : 0;

		__entry->sbc_resp[3] = mrq->sbc ? mrq->sbc->resp[3] : 0;

		__entry->sbc_retries = mrq->sbc ? mrq->sbc->retries : 0;

		__entry->bytes_xfered = mrq->data ? mrq->data->bytes_xfered : 0;

		__entry->data_err = mrq->data ? mrq->data->error : 0;

		__entry->can_retune = host->can_retune;

		__entry->doing_retune = host->doing_retune;

		__entry->retune_now = host->retune_now;

		__entry->need_retune = host->need_retune;

		__entry->hold_retune = host->hold_retune;

		__entry->retune_period = host->retune_period;

		__assign_str(name, mmc_hostname(host));

		__entry->mrq = mrq;

	),



	TP_printk("%s: end struct mmc_request[%p]: "

		  "cmd_opcode=%u cmd_err=%d cmd_resp=0x%x 0x%x 0x%x 0x%x "

		  "cmd_retries=%u stop_opcode=%u stop_err=%d "

		  "stop_resp=0x%x 0x%x 0x%x 0x%x stop_retries=%u "

		  "sbc_opcode=%u sbc_err=%d sbc_resp=0x%x 0x%x 0x%x 0x%x "

		  "sbc_retries=%u bytes_xfered=%u data_err=%d "

		  "can_retune=%u doing_retune=%u retune_now=%u need_retune=%d "

		  "hold_retune=%d retune_period=%u",

		  __get_str(name), __entry->mrq,

		  __entry->cmd_opcode, __entry->cmd_err,

		  __entry->cmd_resp[0], __entry->cmd_resp[1],

		  __entry->cmd_resp[2], __entry->cmd_resp[3],

		  __entry->cmd_retries,

		  __entry->stop_opcode, __entry->stop_err,

		  __entry->stop_resp[0], __entry->stop_resp[1],

		  __entry->stop_resp[2], __entry->stop_resp[3],

		  __entry->stop_retries,

		  __entry->sbc_opcode, __entry->sbc_err,

		  __entry->sbc_resp[0], __entry->sbc_resp[1],

		  __entry->sbc_resp[2], __entry->sbc_resp[3],

		  __entry->sbc_retries,

		  __entry->bytes_xfered, __entry->data_err,

		  __entry->can_retune, __entry->doing_retune,

		  __entry->retune_now, __entry->need_retune,

		  __entry->hold_retune, __entry->retune_period)

);



#endif /* _TRACE_MMC_H */



/* This part must be outside protection */

#include <trace/define_trace.h>