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Commit a72c07a2 authored by Mahesh Sivasubramanian's avatar Mahesh Sivasubramanian
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drivers: soc: qcom: system_stats: Support for System stats 



RPM stats and RPM master stats provide the similar information via
different interfaces. Combine them into a single driver to provide a
unified information.

Change-Id: If5a5ef6e080ab6d75139472c5204eb6d5e9c6614
Signed-off-by: default avatarMahesh Sivasubramanian <msivasub@codeaurora.org>
parent c39fdd2a

Documentation/devicetree/bindings/arm/msm/system_stats.txt

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* System sleep stats



Resource Power manager maintains information about system sleep and the time

each master spent in respective sleep modes. These were previously exported

through two modules, one for system and another for the respective master

votes. The two modules are now combined into a system stats drivers to provide

better visibility into system sleep modes.



Main node properties



- compatible

	Usage: Required

	Value type: <string>

	Definition: must be "qcom,system-stats".



- qcom,rpm-msg-ram

	Usage: Required

	Value type: <phandle>

	Definition: phandle to RPM's message ram registers.



- qcom,rpm-code-ram

	Usage: Required

	Value type: <phandle>

	Definition: phandle to RPM's code ram registers.



- qcom,masters:

	Usage: Required

	Value type: <string list>



Definition of memory DT phandles that system stats module is dependent on.



qcom,rpm-msg-ram:



The required phandle pointed to by qcom,rpm-msg-ram are:

Node properties:

- compatible:

	Usage: Required

	Value Type: <string>

	Definition: must be "qcom,rpm-msg-ram"



- reg:

	Usage: Required

	Value Type: <prop-encoded-array>

	Definition: Addresses and sizes for RPM address as visible to Apps and

	Stats address location.



- reg-names:

	Usage: Required

	Value Type: <stringlist>

	Definition: Address names. Must be "phys_addr_base" or "msg-ram-base".

			Must be specified in the same order as the

			corresponding addresses in the reg property.



qcom,rpm-code-ram:

The required phandle pointed to by qcom,rpm-msg-ram are:



Node properties:

- compatible:

	Usage: Required

	Value Type: <string>

	Definition: must be "qcom,rpm-code-ram".

- reg:

	Usage: Required

	Value Type: <prop-encoded-array>

	Definition: Address and size for RPM code address.



- reg-names:

	Usage: Required

	Value Type: <stringlist>

	Definition: Address names. Must be "msg-ram-base"



Example:



	rpm_code_ram: rpm-memory@0x68000 {

		compatible = "qcom,rpm-code-ram";

		reg = <0x68000 0x5000>;

		reg-name = "msg-ram-base";

	};



	rpm_msg_ram: memory@0x200000 {

		compatible = "qcom,rpm-msg-ram";

		reg = <0x200000 0x1000>,

			<0x290000 0x1000>;

		reg-names = "phys_addr_base",

			"code-ram-base";

	};



	qcom,system-stats@68140 {

		compatible = "qcom,system-stats";

		qcom,rpm-msg-ram = <&rpm_msg_ram>;

		qcom,rpm-code-ram = <&rpm_code_ram>;

		qcom,masters = "APSS", "MPSS", "ADSP", "SLPI";

	};

drivers/soc/qcom/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -58,7 +58,7 @@ obj-y += qdsp6v2/ 
obj-$(CONFIG_MSM_RPM_RBCPR_STATS_V2_LOG) += rpm_rbcpr_stats_v2.o

obj-$(CONFIG_MEM_SHARE_QMI_SERVICE)		+= memshare/

obj-$(CONFIG_CP_ACCESS64) += cpaccess64.o

obj-$(CONFIG_MSM_RPM_STATS_LOG) += rpm_stats.o rpm_master_stat.o rpm_rail_stats.o

obj-$(CONFIG_MSM_RPM_STATS_LOG) += rpm_stats.o rpm_master_stat.o rpm_rail_stats.o system_stats.o

obj-$(CONFIG_HW_PERF_EVENTS) += perf_event_kryo.o perf_event_l2.o

obj-$(CONFIG_MSM_RPM_LOG) += rpm_log.o

obj-$(CONFIG_MSM_JTAG) += jtag-fuse.o jtag.o

drivers/soc/qcom/system_stats.c

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/* Copyright (c) 2016, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */

#include <linux/debugfs.h>

#include <linux/delay.h>

#include <linux/errno.h>

#include <linux/init.h>

#include <linux/io.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/sched.h>

#include <linux/slab.h>

#include <linux/types.h>

#include <linux/mm.h>

#include <linux/types.h>

#include <linux/of.h>

#include <linux/of_address.h>

#include <linux/uaccess.h>

#include <asm/arch_timer.h>



#define SCLK_HZ 32768

#define MSM_ARCH_TIMER_FREQ 19200000

#define NUM_STATS_RECORD 2

#define STATS_OFFSET 0x14

#define HEAP_OFFSET 0x1c

#define MASTER_START_ADDR_OFFSET 0x150

#define MASTER_OFFSET_ADDRESS 0x1000



struct rpm_system_stats {

	void __iomem *rpm_stats_addr;

	void __iomem *rpm_master_addr;

	int num_masters;

	char **master;

} ss;



struct msm_rpmstats_record {

	char name[32];

	uint32_t id;

	uint32_t val;

};



struct msm_rpm_stats_data {

	uint32_t stat_type;

	uint32_t count;

	uint64_t last_entered_at;

	uint64_t last_exited_at;

	uint64_t accumulated;

	uint32_t client_votes;

	uint32_t reserved[3];

};



struct rpm_master_stats_data {

	uint32_t active_cores;

	uint32_t numshutdowns;

	uint64_t shutdown_req;

	uint64_t wakeup_ind;

	uint64_t bringup_req;

	uint64_t bringup_ack;

	uint32_t wakeup_reason; /* 0 = rude wakeup, 1 = scheduled wakeup */

	uint32_t last_sleep_transition_duration;

	uint32_t last_wake_transition_duration;

	uint32_t xo_count;

	uint64_t xo_last_entered_at;

	uint64_t xo_last_exited_at;

	uint64_t xo_accumulated_duration;

};



static inline uint32_t msm_rpmstats_read_long_register(void __iomem *regbase,

		int index, int offset)

{

	return readl_relaxed(regbase + offset +

			index * sizeof(struct msm_rpm_stats_data));

}



static inline uint64_t msm_rpmstats_read_quad_register(void __iomem *regbase,

		int index, int offset)

{

	uint64_t dst;



	memcpy_fromio(&dst,

		regbase + offset + index * sizeof(struct msm_rpm_stats_data),

		8);

	return dst;

}



static inline unsigned long  msm_rpmstats_read_register(void __iomem *regbase,

		int index, int offset)

{

	return  readl_relaxed(regbase + index * 12 + (offset + 1) * 4);

}



static inline uint64_t get_time_in_msec(u64 counter)

{

	do_div(counter, MSM_ARCH_TIMER_FREQ);

	counter *= MSEC_PER_SEC;

	return counter;

}



static inline uint64_t get_time_in_sec(u64 counter)

{

	do_div(counter, MSM_ARCH_TIMER_FREQ);

	return counter;

}



static void rpm_stats_copy_data(struct msm_rpm_stats_data *data, int idx)

{

	void __iomem *reg = ss.rpm_stats_addr;



	data->stat_type = msm_rpmstats_read_long_register(reg, idx,

			offsetof(struct msm_rpm_stats_data, stat_type));



	data->count = msm_rpmstats_read_long_register(reg, idx,

			offsetof(struct msm_rpm_stats_data, count));

	data->last_entered_at = msm_rpmstats_read_quad_register(reg,

			idx, offsetof(struct msm_rpm_stats_data,

				last_entered_at));

	data->last_exited_at = msm_rpmstats_read_quad_register(reg,

			idx, offsetof(struct msm_rpm_stats_data,

				last_exited_at));



	data->accumulated = msm_rpmstats_read_quad_register(reg,

			idx, offsetof(struct msm_rpm_stats_data,

				accumulated));

	data->client_votes = msm_rpmstats_read_long_register(reg,

			idx, offsetof(struct msm_rpm_stats_data,

				client_votes));

}



static int rpm_stats_write_buf(struct seq_file *m)

{

	struct msm_rpm_stats_data rs;

	int i;



	for (i = 0; i < NUM_STATS_RECORD; i++) {

		char stat_type[5] = {0};

		uint64_t time;



		rpm_stats_copy_data(&rs, i);

		memcpy(stat_type, &rs.stat_type, sizeof(uint32_t));

		seq_printf(m, "RPM Mode:%s\n", stat_type);

		seq_printf(m, "\tcount:%d\n", rs.count);



		time = rs.last_exited_at - rs.last_entered_at;

		time = get_time_in_msec(time);

		seq_printf(m, "\ttime in last mode(msec):%llu\n", time);



		time = arch_counter_get_cntpct() - rs.last_exited_at;

		time = get_time_in_sec(time);

		seq_printf(m, "\ttime since last mode(sec):%llu\n", time);



		time = get_time_in_msec(rs.accumulated);

		seq_printf(m, "\tactual last sleep(msec):%llu\n", time);



		seq_printf(m, "\tclient votes: %#010x\n\n", rs.client_votes);

	}



	return 0;

}



static void master_stats_copy_data(struct rpm_master_stats_data *data, int idx)

{

	data->shutdown_req = readq_relaxed(ss.rpm_master_addr +

			idx * MASTER_OFFSET_ADDRESS +

			offsetof(struct rpm_master_stats_data, shutdown_req));



	data->wakeup_ind = readq_relaxed(ss.rpm_master_addr +

			(idx * MASTER_OFFSET_ADDRESS +

			 offsetof(struct rpm_master_stats_data, wakeup_ind)));



	data->bringup_req = readq_relaxed(ss.rpm_master_addr +

			(idx * MASTER_OFFSET_ADDRESS +

			 offsetof(struct rpm_master_stats_data, bringup_req)));



	data->bringup_ack = readq_relaxed(ss.rpm_master_addr +

			(idx * MASTER_OFFSET_ADDRESS +

			 offsetof(struct rpm_master_stats_data, bringup_ack)));



	data->xo_last_entered_at = readq_relaxed(ss.rpm_master_addr +

			(idx * MASTER_OFFSET_ADDRESS +

			 offsetof(struct rpm_master_stats_data,

				 xo_last_entered_at)));



	data->xo_last_exited_at = readq_relaxed(ss.rpm_master_addr +

			(idx * MASTER_OFFSET_ADDRESS +

			 offsetof(struct rpm_master_stats_data,

				 xo_last_exited_at)));



	data->xo_accumulated_duration =

		readq_relaxed(ss.rpm_master_addr +

				(idx * MASTER_OFFSET_ADDRESS +

				 offsetof(struct rpm_master_stats_data,

					 xo_accumulated_duration)));



	data->last_sleep_transition_duration =

		readl_relaxed(ss.rpm_master_addr +

				(idx * MASTER_OFFSET_ADDRESS +

				 offsetof(struct rpm_master_stats_data,

					 last_sleep_transition_duration)));



	data->last_wake_transition_duration =

		readl_relaxed(ss.rpm_master_addr +

				(idx * MASTER_OFFSET_ADDRESS +

				 offsetof(struct rpm_master_stats_data,

					 last_wake_transition_duration)));



	data->xo_count =

		readl_relaxed(ss.rpm_master_addr +

				(idx * MASTER_OFFSET_ADDRESS +

				 offsetof(struct rpm_master_stats_data,

					 xo_count)));



	data->wakeup_reason = readl_relaxed(ss.rpm_master_addr +

			(idx * MASTER_OFFSET_ADDRESS +

			 offsetof(struct rpm_master_stats_data,

				 wakeup_reason)));



	data->numshutdowns = readl_relaxed(ss.rpm_master_addr +

			(idx * MASTER_OFFSET_ADDRESS +

			 offsetof(struct rpm_master_stats_data, numshutdowns)));



	data->active_cores = readl_relaxed(ss.rpm_master_addr +

			(idx * MASTER_OFFSET_ADDRESS) +

			offsetof(struct rpm_master_stats_data, active_cores));



}



static int master_stats_write_buf(struct seq_file *m)

{

	struct rpm_master_stats_data ms;

	int i;



	for (i = 0; i < ss.num_masters; i++) {



		master_stats_copy_data(&ms, i);



		seq_printf(m, "%s\n", ss.master[i]);

		seq_printf(m, "\tShutdown Request:0x%llX\n", ms.shutdown_req);

		seq_printf(m, "\tWakeup interrupt:0x%llX\n", ms.wakeup_ind);

		seq_printf(m, "\tBringup Req::0x%llX\n", ms.bringup_req);

		seq_printf(m, "\tBringup Ack:0x%llX\n", ms.bringup_ack);

		seq_printf(m, "\tLast XO Entry:0x%llX\n",

				ms.xo_last_entered_at);

		seq_printf(m, "\tLast XO Exit:0x%llX\n", ms.xo_last_exited_at);

		seq_printf(m, "\tAccumulated XO duration:0x%llX\n",

			ms.xo_accumulated_duration);

		seq_printf(m, "\tLast sleep transition duration:0x%x\n",

			ms.last_sleep_transition_duration);

		seq_printf(m, "\tLast wake transition duration:0x%x\n",

			ms.last_wake_transition_duration);

		seq_printf(m, "\tXO Count:0x%x\n", ms.xo_count);

		seq_printf(m, "\tWakeup Reason:0x%s\n",

			ms.wakeup_reason ? "Sched" : "Rude");

		seq_printf(m, "\tNum Shutdowns:0x%x\n", ms.numshutdowns);

		seq_printf(m, "\tActive Cores:0x%x\n", ms.active_cores);

	}

	return 0;

}



static int ss_file_show(struct seq_file *m, void *v)

{

	int ret = 0;



	ret = rpm_stats_write_buf(m);

	if (ret)

		return ret;



	return master_stats_write_buf(m);

}



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

{

	return single_open(file, ss_file_show, inode->i_private);

}



static const struct file_operations ss_file_ops = {

	.owner = THIS_MODULE,

	.open = ss_file_open,

	.read = seq_read,

	.llseek = no_llseek,

	.release = single_release,

};



static int msm_rpmstats_probe(struct platform_device *pdev)

{

	struct dentry *dent = NULL;

	struct device_node *node = NULL;

	uint32_t offset = 0;

	void __iomem *offset_addr = NULL;

	struct resource res;

	int i, ret = 0;



	if (!pdev)

		return -EINVAL;



	node = of_parse_phandle(pdev->dev.of_node, "qcom,rpm-msg-ram", 0);

	if (!node)

		return -EINVAL;



	ret = of_address_to_resource(node, 1, &res);

	if (ret)

		return ret;



	offset_addr = ioremap_nocache(res.start + STATS_OFFSET,

			resource_size(&res));

	if (!offset_addr)

		return -ENOMEM;



	offset = readl_relaxed(offset_addr);

	iounmap(offset_addr);



	ret = of_address_to_resource(node, 0, &res);

	if (ret)

		return ret;



	ss.rpm_stats_addr = devm_ioremap_nocache(&pdev->dev,

			res.start + offset,

			resource_size(&res));



	if (!ss.rpm_stats_addr)

		return -ENOMEM;



	node = of_parse_phandle(pdev->dev.of_node, "qcom,rpm-code-ram", 0);

	if (!node)

		return -EINVAL;



	ret = of_address_to_resource(node, 0, &res);

	if (ret)

		return ret;



	ss.rpm_master_addr = devm_ioremap_nocache(

			&pdev->dev, res.start + MASTER_START_ADDR_OFFSET,

			resource_size(&res));



	if (!ss.rpm_master_addr)

		return -ENOMEM;



	ss.num_masters = of_property_count_strings(pdev->dev.of_node,

			"qcom,masters");

	if (ss.num_masters < 0) {

		dev_err(&pdev->dev, "Failed to get number of masters =%d\n",

						ss.num_masters);

		return -EINVAL;

	}



	ss.master = devm_kzalloc(&pdev->dev,

			sizeof(char *) * ss.num_masters, GFP_KERNEL);



	if (!ss.master) {

		dev_err(&pdev->dev, "%s:Failed to allocated memory\n",

				__func__);

		return -ENOMEM;

	}



	/*

	 * Read master names from DT

	 */

	for (i = 0; i < ss.num_masters; i++) {

		const char *master_name;



		of_property_read_string_index(pdev->dev.of_node,

				"qcom,masters",

				i, &master_name);

		ss.master[i] = devm_kzalloc(&pdev->dev,

				sizeof(char) * strlen(master_name) + 1,

				GFP_KERNEL);

		if (!ss.master[i]) {

			pr_err("%s:Failed to get memory\n", __func__);

			return -ENOMEM;

		}

		strlcpy(ss.master[i], master_name,

					strlen(master_name) + 1);

	}



	dent = debugfs_create_file("system_stats", S_IRUGO, NULL,

			&ss, &ss_file_ops);



	if (!dent) {

		pr_err("%s: ERROR rpm_stats debugfs_create_file fail\n",

				__func__);

		return -ENOMEM;

	}



	platform_set_drvdata(pdev, dent);

	return 0;

}



static int msm_rpmstats_remove(struct platform_device *pdev)

{

	struct dentry *dent;



	dent = platform_get_drvdata(pdev);

	debugfs_remove(dent);

	return 0;

}



static struct of_device_id rpm_stats_table[] = {

	       {.compatible = "qcom,system-stats"},

	       {},

};



static struct platform_driver msm_system_stats_driver = {

	.probe = msm_rpmstats_probe,

	.remove = msm_rpmstats_remove,

	.driver = {

		.name = "msm_stat",

		.owner = THIS_MODULE,

		.of_match_table = rpm_stats_table,

	},

};



module_platform_driver(msm_system_stats_driver);



MODULE_LICENSE("GPL v2");

MODULE_DESCRIPTION("MSM Statistics driver");

MODULE_ALIAS("platform:stat_log");