Commit c8377adf authored by Tri Vo's avatar Tri Vo Committed by Rafael J. Wysocki
Browse files

PM / wakeup: Show wakeup sources stats in sysfs 



Add an ID and a device pointer to 'struct wakeup_source'. Use them to to
expose wakeup sources statistics in sysfs under
/sys/class/wakeup/wakeup<ID>/*.

Co-developed-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Co-developed-by: default avatarStephen Boyd <swboyd@chromium.org>
Signed-off-by: default avatarStephen Boyd <swboyd@chromium.org>
Signed-off-by: default avatarTri Vo <trong@android.com>
Tested-by: default avatarKalesh Singh <kaleshsingh@google.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 2434aea5

Documentation/ABI/testing/sysfs-class-wakeup

0 → 100644
+76 −0
Original line number Diff line number Diff line 
What:		/sys/class/wakeup/

Date:		June 2019

Contact:	Tri Vo <trong@android.com>

Description:

		The /sys/class/wakeup/ directory contains pointers to all

		wakeup sources in the kernel at that moment in time.



What:		/sys/class/wakeup/.../name

Date:		June 2019

Contact:	Tri Vo <trong@android.com>

Description:

		This file contains the name of the wakeup source.



What:		/sys/class/wakeup/.../active_count

Date:		June 2019

Contact:	Tri Vo <trong@android.com>

Description:

		This file contains the number of times the wakeup source was

		activated.



What:		/sys/class/wakeup/.../event_count

Date:		June 2019

Contact:	Tri Vo <trong@android.com>

Description:

		This file contains the number of signaled wakeup events

		associated with the wakeup source.



What:		/sys/class/wakeup/.../wakeup_count

Date:		June 2019

Contact:	Tri Vo <trong@android.com>

Description:

		This file contains the number of times the wakeup source might

		abort suspend.



What:		/sys/class/wakeup/.../expire_count

Date:		June 2019

Contact:	Tri Vo <trong@android.com>

Description:

		This file contains the number of times the wakeup source's

		timeout has expired.



What:		/sys/class/wakeup/.../active_time_ms

Date:		June 2019

Contact:	Tri Vo <trong@android.com>

Description:

		This file contains the amount of time the wakeup source has

		been continuously active, in milliseconds.  If the wakeup

		source is not active, this file contains '0'.



What:		/sys/class/wakeup/.../total_time_ms

Date:		June 2019

Contact:	Tri Vo <trong@android.com>

Description:

		This file contains the total amount of time this wakeup source

		has been active, in milliseconds.



What:		/sys/class/wakeup/.../max_time_ms

Date:		June 2019

Contact:	Tri Vo <trong@android.com>

Description:

		This file contains the maximum amount of time this wakeup

		source has been continuously active, in milliseconds.



What:		/sys/class/wakeup/.../last_change_ms

Date:		June 2019

Contact:	Tri Vo <trong@android.com>

Description:

		This file contains the monotonic clock time when the wakeup

		source was touched last time, in milliseconds.



What:		/sys/class/wakeup/.../prevent_suspend_time_ms

Date:		June 2019

Contact:	Tri Vo <trong@android.com>

Description:

		The file contains the total amount of time this wakeup source

		has been preventing autosleep, in milliseconds.

drivers/acpi/device_pm.c

+2 −1
Original line number Diff line number Diff line
@@ -497,7 +497,8 @@ acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev, 
		goto out;



	mutex_lock(&acpi_pm_notifier_lock);

	adev->wakeup.ws = wakeup_source_register(dev_name(&adev->dev));

	adev->wakeup.ws = wakeup_source_register(&adev->dev,

						 dev_name(&adev->dev));

	adev->wakeup.context.dev = dev;

	adev->wakeup.context.func = func;

	adev->wakeup.flags.notifier_present = true;

drivers/base/power/Makefile

+1 −1
Original line number Diff line number Diff line 
# SPDX-License-Identifier: GPL-2.0

obj-$(CONFIG_PM)	+= sysfs.o generic_ops.o common.o qos.o runtime.o wakeirq.o

obj-$(CONFIG_PM_SLEEP)	+= main.o wakeup.o

obj-$(CONFIG_PM_SLEEP)	+= main.o wakeup.o wakeup_stats.o

obj-$(CONFIG_PM_TRACE_RTC)	+= trace.o

obj-$(CONFIG_PM_GENERIC_DOMAINS)	+=  domain.o domain_governor.o

obj-$(CONFIG_HAVE_CLK)	+= clock_ops.o

drivers/base/power/power.h

+9 −0
Original line number Diff line number Diff line
@@ -149,3 +149,12 @@ static inline void device_pm_init(struct device *dev) 
	device_pm_sleep_init(dev);

	pm_runtime_init(dev);

}



#ifdef CONFIG_PM_SLEEP



/* drivers/base/power/wakeup_stats.c */

extern int wakeup_source_sysfs_add(struct device *parent,

				   struct wakeup_source *ws);

extern void wakeup_source_sysfs_remove(struct wakeup_source *ws);



#endif /* CONFIG_PM_SLEEP */

drivers/base/power/wakeup.c

+24 −4
Original line number Diff line number Diff line
@@ -72,6 +72,8 @@ static struct wakeup_source deleted_ws = { 
	.lock =  __SPIN_LOCK_UNLOCKED(deleted_ws.lock),

};



static DEFINE_IDA(wakeup_ida);



/**

 * wakeup_source_create - Create a struct wakeup_source object.

 * @name: Name of the new wakeup source.
@@ -80,6 +82,7 @@ struct wakeup_source *wakeup_source_create(const char *name) 
{

	struct wakeup_source *ws;

	const char *ws_name;

	int id;



	ws = kzalloc(sizeof(*ws), GFP_KERNEL);

	if (!ws)
@@ -90,8 +93,15 @@ struct wakeup_source *wakeup_source_create(const char *name) 
		goto err_name;

	ws->name = ws_name;



	id = ida_alloc(&wakeup_ida, GFP_KERNEL);

	if (id < 0)

		goto err_id;

	ws->id = id;



	return ws;



err_id:

	kfree_const(ws->name);

err_name:

	kfree(ws);

err_ws:
@@ -140,6 +150,7 @@ void wakeup_source_destroy(struct wakeup_source *ws) 


	__pm_relax(ws);

	wakeup_source_record(ws);

	ida_free(&wakeup_ida, ws->id);

	kfree_const(ws->name);

	kfree(ws);

}
@@ -193,16 +204,24 @@ EXPORT_SYMBOL_GPL(wakeup_source_remove); 


/**

 * wakeup_source_register - Create wakeup source and add it to the list.

 * @dev: Device this wakeup source is associated with (or NULL if virtual).

 * @name: Name of the wakeup source to register.

 */

struct wakeup_source *wakeup_source_register(const char *name)

struct wakeup_source *wakeup_source_register(struct device *dev,

					     const char *name)

{

	struct wakeup_source *ws;

	int ret;



	ws = wakeup_source_create(name);

	if (ws)

	if (ws) {

		ret = wakeup_source_sysfs_add(dev, ws);

		if (ret) {

			wakeup_source_destroy(ws);

			return NULL;

		}

		wakeup_source_add(ws);



	}

	return ws;

}

EXPORT_SYMBOL_GPL(wakeup_source_register);
@@ -215,6 +234,7 @@ void wakeup_source_unregister(struct wakeup_source *ws) 
{

	if (ws) {

		wakeup_source_remove(ws);

		wakeup_source_sysfs_remove(ws);

		wakeup_source_destroy(ws);

	}

}
@@ -258,7 +278,7 @@ int device_wakeup_enable(struct device *dev) 
	if (pm_suspend_target_state != PM_SUSPEND_ON)

		dev_dbg(dev, "Suspicious %s() during system transition!\n", __func__);



	ws = wakeup_source_register(dev_name(dev));

	ws = wakeup_source_register(dev, dev_name(dev));

	if (!ws)

		return -ENOMEM;

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