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Commit 11a0c920 authored by Tushar Nimkar's avatar Tushar Nimkar Committed by Gerrit - the friendly Code Review server
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drivers: qcom: subsystem_sleep_stats: Reuse apss stats if available 



rpmh_master_stats driver maintained apss master stats. If it does
apss_master_stats.version_id get updated to non-zero value.

This change adds support to reuse already calculated data. Also
while doing this converts duration(ticks) to msec.

Change-Id: I5a1db5cc9543deba68e3c047223f6e93c635b733
Signed-off-by: default avatarTushar Nimkar <tnimkar@codeaurora.org>
parent e2246599

drivers/soc/qcom/subsystem_sleep_stats.c

+23 −1
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#include <linux/slab.h>

#include <linux/soc/qcom/smem.h>

#include <linux/uaccess.h>

#include "rpmh_master_stat.h"



#define STATS_BASEMINOR				0

#define STATS_MAX_MINOR				1
@@ -28,6 +29,8 @@ 
#define DDR_STATS_COUNT_ADDR		0x4

#define DDR_STATS_DURATION_ADDR		0x8



#define MSM_ARCH_TIMER_FREQ	19200000



#define APSS_IOCTL		_IOR(SUBSYSTEM_STATS_MAGIC_NUM, 0, \

				     struct sleep_stats *)

#define MODEM_IOCTL		_IOR(SUBSYSTEM_STATS_MAGIC_NUM, 1, \
@@ -117,6 +120,13 @@ struct sleep_stats_data { 


static DEFINE_MUTEX(sleep_stats_mutex);



static inline u64 get_time_in_msec(u64 counter)

{

	do_div(counter, MSM_ARCH_TIMER_FREQ);

	counter *= MSEC_PER_SEC;



	return counter;

}

static int stats_data_open(struct inode *inode, struct file *file)

{

	struct sleep_stats_data *drvdata = NULL;
@@ -142,6 +152,7 @@ static void ddr_stats_sleep_stat(struct sleep_stats_data *stats_data, struct sle 
		(ddr_stats + i)->last_entered_at = 0xDEADDEAD;

		(ddr_stats + i)->last_exited_at = 0xDEADDEAD;

		(ddr_stats + i)->accumulated = readq_relaxed(reg + DDR_STATS_DURATION_ADDR);

		(ddr_stats + i)->accumulated = get_time_in_msec((ddr_stats + i)->accumulated);

		reg += sizeof(struct sleep_stats) - 2 * sizeof(u64);

	}

}
@@ -154,7 +165,18 @@ static int subsystem_sleep_stats(struct sleep_stats_data *stats_data, struct sle 
	if (pid == SUBSYSTEM_STATS_OTHERS_NUM)

		memcpy_fromio(stats, stats_data->reg[idx], sizeof(*stats));

	else {

		/* Check if HLOS already maintained APSS stats */

		if (pid == QCOM_SMEM_HOST_ANY) {

			struct msm_rpmh_master_stats *apss_data = msm_rpmh_get_apss_data();



			if (apss_data && apss_data->version_id == 0x1)

				subsystem_stats_data = (struct sleep_stats *) apss_data;

			else

				subsystem_stats_data = qcom_smem_get(pid, idx, NULL);

		} else {

			subsystem_stats_data = qcom_smem_get(pid, idx, NULL);

		}



		if (IS_ERR(subsystem_stats_data))

			return -ENODEV;