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Commit 9b1ff4b8 authored by Rishabh Bhatnagar's avatar Rishabh Bhatnagar
Browse files

drivers: soc: qcom: Add snapshot of boot stats driver 



Snapshot of boot stats driver as of msm-4.14 commmit <6a24e5b9>.
(Merge "ARM: dts: msm: Disable dynamic-loading from HLOS_PHYSPOOL for qcs405").

Change-Id: I72a73be6d24fed5e8aa05864b0e1b3c8896e7d58
Signed-off-by: default avatarRishabh Bhatnagar <rishabhb@codeaurora.org>
parent 23ff8d82

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

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* MSM MPM sleep counter (mpm-v2)



The MPM provides a timetick that starts when the device is powered up and

is not reset by any of the boot loaders or the HLOS. The MPM timetick counter

driver provides an api to get this value.



The required nodes for the MPM timetick counter driver are:



- compatible: "qcom,mpm2-sleep-counter"

- reg: Specifies the physical address of the timetick count register.

- clock-frequency: the physical counter frequency.



Example:

	qcom,mpm2-sleep-counter@4a3000 {

		compatible = "qcom,mpm2-sleep-counter";

		reg = <0x4a3000 0x1000>;

		clock-frequency = <32768>;

	};

drivers/soc/qcom/Kconfig

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@@ -184,5 +184,12 @@ config MSM_PIL_SSR_GENERIC 
	  interrupt for the subsystem and restarts it on a watchdog bite

	  or a fatal error. Subsystems include LPASS, Venus, VPU, WCNSS and

	  BCSS.

config MSM_BOOT_STATS

	bool "Use MSM boot stats reporting"

	help

	  Use this to report msm boot stats such as bootloader throughput,

	  display init, total boot time.

	  This figures are reported in mpm sleep clock cycles and have a

	  resolution of 31 bits as 1 bit is used as an overflow check.



endmenu

drivers/soc/qcom/Makefile

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@@ -15,6 +15,7 @@ obj-$(CONFIG_QCOM_SMSM) += smsm.o 
obj-$(CONFIG_QCOM_WCNSS_CTRL) += wcnss_ctrl.o

CFLAGS_scm.o :=$(call as-instr,.arch_extension sec,-DREQUIRES_SEC=1)

obj-$(CONFIG_QCOM_SCM)  +=      scm.o

obj-$(CONFIG_MSM_BOOT_STATS) += boot_stats.o

obj-$(CONFIG_MSM_SERVICE_NOTIFIER) += service-notifier.o

obj-$(CONFIG_MSM_SERVICE_LOCATOR) += service-locator.o

obj-$(CONFIG_MSM_SYSMON_GLINK_COMM) += sysmon-glink.o sysmon-qmi.o

drivers/soc/qcom/boot_stats.c

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// SPDX-License-Identifier: GPL-2.0

/*

 * Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.

 */



#include <linux/kernel.h>

#include <linux/err.h>

#include <linux/io.h>

#include <linux/init.h>

#include <linux/delay.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/clk.h>

#include <linux/cpu.h>

#include <linux/sched.h>

#include <linux/of.h>

#include <linux/of_address.h>



struct boot_stats {

	uint32_t bootloader_start;

	uint32_t bootloader_end;

	uint32_t bootloader_display;

	uint32_t bootloader_load_kernel;

};



static void __iomem *mpm_counter_base;

static uint32_t mpm_counter_freq;

static struct boot_stats __iomem *boot_stats;



static int mpm_parse_dt(void)

{

	struct device_node *np_imem, *np_mpm2;



	np_imem = of_find_compatible_node(NULL, NULL,

				"qcom,msm-imem-boot_stats");

	if (!np_imem) {

		pr_err("can't find qcom,msm-imem node\n");

		return -ENODEV;

	}

	boot_stats = of_iomap(np_imem, 0);

	if (!boot_stats) {

		pr_err("boot_stats: Can't map imem\n");

		goto err1;

	}



	np_mpm2 = of_find_compatible_node(NULL, NULL,

				"qcom,mpm2-sleep-counter");

	if (!np_mpm2) {

		pr_err("mpm_counter: can't find DT node\n");

		goto err1;

	}



	if (of_property_read_u32(np_mpm2, "clock-frequency", &mpm_counter_freq))

		goto err2;



	if (of_get_address(np_mpm2, 0, NULL, NULL)) {

		mpm_counter_base = of_iomap(np_mpm2, 0);

		if (!mpm_counter_base) {

			pr_err("mpm_counter: cant map counter base\n");

			goto err2;

		}

	} else

		goto err2;



	return 0;



err2:

	of_node_put(np_mpm2);

err1:

	of_node_put(np_imem);

	return -ENODEV;

}



static void print_boot_stats(void)

{

	pr_info("KPI: Bootloader start count = %u\n",

		readl_relaxed(&boot_stats->bootloader_start));

	pr_info("KPI: Bootloader end count = %u\n",

		readl_relaxed(&boot_stats->bootloader_end));

	pr_info("KPI: Bootloader display count = %u\n",

		readl_relaxed(&boot_stats->bootloader_display));

	pr_info("KPI: Bootloader load kernel count = %u\n",

		readl_relaxed(&boot_stats->bootloader_load_kernel));

	pr_info("KPI: Kernel MPM timestamp = %u\n",

		readl_relaxed(mpm_counter_base));

	pr_info("KPI: Kernel MPM Clock frequency = %u\n",

		mpm_counter_freq);

}



int boot_stats_init(void)

{

	int ret;



	ret = mpm_parse_dt();

	if (ret < 0)

		return -ENODEV;



	print_boot_stats();



	iounmap(boot_stats);

	iounmap(mpm_counter_base);



	return 0;

}

include/soc/qcom/boot_stats.h

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/* SPDX-License-Identifier: GPL-2.0 */

/*

 * Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.

 */



#ifdef CONFIG_MSM_BOOT_STATS

int boot_stats_init(void);

#else

static inline int boot_stats_init(void) { return 0; }

#endif