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Commit 351520a9 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

Merge branch 'pm-sleep' 

* pm-sleep:
  PM / Sleep: User space wakeup sources garbage collector Kconfig option
  PM / Sleep: Make the limit of user space wakeup sources configurable
  PM / Documentation: suspend-and-cpuhotplug.txt: Fix typo
  PM / Sleep: Fix a mistake in a conditional in autosleep_store()
  epoll: Add a flag, EPOLLWAKEUP, to prevent suspend while epoll events are ready
  PM / Sleep: Add user space interface for manipulating wakeup sources, v3
  PM / Sleep: Add "prevent autosleep time" statistics to wakeup sources
  PM / Sleep: Implement opportunistic sleep, v2
  PM / Sleep: Add wakeup_source_activate and wakeup_source_deactivate tracepoints
  PM / Sleep: Change wakeup source statistics to follow Android
  PM / Sleep: Use wait queue to signal "no wakeup events in progress"
  PM / Sleep: Look for wakeup events in later stages of device suspend
  PM / Hibernate: Hibernate/thaw fixes/improvements
parents e6d18093 4e585d25

Documentation/ABI/testing/sysfs-devices-power

+28 −7
Original line number Diff line number Diff line
@@ -96,16 +96,26 @@ Description: 
		is read-only.  If the device is not enabled to wake up the

		system from sleep states, this attribute is not present.



What:		/sys/devices/.../power/wakeup_hit_count

Date:		September 2010

What:		/sys/devices/.../power/wakeup_abort_count

Date:		February 2012

Contact:	Rafael J. Wysocki <rjw@sisk.pl>

Description:

		The /sys/devices/.../wakeup_hit_count attribute contains the

		The /sys/devices/.../wakeup_abort_count attribute contains the

		number of times the processing of a wakeup event associated with

		the device might prevent the system from entering a sleep state.

		This attribute is read-only.  If the device is not enabled to

		wake up the system from sleep states, this attribute is not

		present.

		the device might have aborted system transition into a sleep

		state in progress.  This attribute is read-only.  If the device

		is not enabled to wake up the system from sleep states, this

		attribute is not present.



What:		/sys/devices/.../power/wakeup_expire_count

Date:		February 2012

Contact:	Rafael J. Wysocki <rjw@sisk.pl>

Description:

		The /sys/devices/.../wakeup_expire_count attribute contains the

		number of times a wakeup event associated with the device has

		been reported with a timeout that expired.  This attribute is

		read-only.  If the device is not enabled to wake up the system

		from sleep states, this attribute is not present.



What:		/sys/devices/.../power/wakeup_active

Date:		September 2010
@@ -148,6 +158,17 @@ Description: 
		not enabled to wake up the system from sleep states, this

		attribute is not present.



What:		/sys/devices/.../power/wakeup_prevent_sleep_time_ms

Date:		February 2012

Contact:	Rafael J. Wysocki <rjw@sisk.pl>

Description:

		The /sys/devices/.../wakeup_prevent_sleep_time_ms attribute

		contains the total time the device has been preventing

		opportunistic transitions to sleep states from occuring.

		This attribute is read-only.  If the device is not enabled to

		wake up the system from sleep states, this attribute is not

		present.



What:		/sys/devices/.../power/autosuspend_delay_ms

Date:		September 2010

Contact:	Alan Stern <stern@rowland.harvard.edu>

Documentation/ABI/testing/sysfs-power

+59 −0
Original line number Diff line number Diff line
@@ -172,3 +172,62 @@ Description: 


		Reading from this file will display the current value, which is

		set to 1 MB by default.



What:		/sys/power/autosleep

Date:		April 2012

Contact:	Rafael J. Wysocki <rjw@sisk.pl>

Description:

		The /sys/power/autosleep file can be written one of the strings

		returned by reads from /sys/power/state.  If that happens, a

		work item attempting to trigger a transition of the system to

		the sleep state represented by that string is queued up.  This

		attempt will only succeed if there are no active wakeup sources

		in the system at that time.  After every execution, regardless

		of whether or not the attempt to put the system to sleep has

		succeeded, the work item requeues itself until user space

		writes "off" to /sys/power/autosleep.



		Reading from this file causes the last string successfully

		written to it to be returned.



What:		/sys/power/wake_lock

Date:		February 2012

Contact:	Rafael J. Wysocki <rjw@sisk.pl>

Description:

		The /sys/power/wake_lock file allows user space to create

		wakeup source objects and activate them on demand (if one of

		those wakeup sources is active, reads from the

		/sys/power/wakeup_count file block or return false).  When a

		string without white space is written to /sys/power/wake_lock,

		it will be assumed to represent a wakeup source name.  If there

		is a wakeup source object with that name, it will be activated

		(unless active already).  Otherwise, a new wakeup source object

		will be registered, assigned the given name and activated.

		If a string written to /sys/power/wake_lock contains white

		space, the part of the string preceding the white space will be

		regarded as a wakeup source name and handled as descrived above.

		The other part of the string will be regarded as a timeout (in

		nanoseconds) such that the wakeup source will be automatically

		deactivated after it has expired.  The timeout, if present, is

		set regardless of the current state of the wakeup source object

		in question.



		Reads from this file return a string consisting of the names of

		wakeup sources created with the help of it that are active at

		the moment, separated with spaces.





What:		/sys/power/wake_unlock

Date:		February 2012

Contact:	Rafael J. Wysocki <rjw@sisk.pl>

Description:

		The /sys/power/wake_unlock file allows user space to deactivate

		wakeup sources created with the help of /sys/power/wake_lock.

		When a string is written to /sys/power/wake_unlock, it will be

		assumed to represent the name of a wakeup source to deactivate.

		If a wakeup source object of that name exists and is active at

		the moment, it will be deactivated.



		Reads from this file return a string consisting of the names of

		wakeup sources created with the help of /sys/power/wake_lock

		that are inactive at the moment, separated with spaces.

Documentation/power/suspend-and-cpuhotplug.txt

+1 −1
Original line number Diff line number Diff line
@@ -29,7 +29,7 @@ More details follow: 


                                  Write 'mem' to

                                /sys/power/state

                                    syfs file

                                    sysfs file

                                        |

                                        v

                               Acquire pm_mutex lock

drivers/base/power/main.c

+10 −0
Original line number Diff line number Diff line
@@ -889,6 +889,11 @@ static int dpm_suspend_noirq(pm_message_t state) 
		if (!list_empty(&dev->power.entry))

			list_move(&dev->power.entry, &dpm_noirq_list);

		put_device(dev);



		if (pm_wakeup_pending()) {

			error = -EBUSY;

			break;

		}

	}

	mutex_unlock(&dpm_list_mtx);

	if (error)
@@ -962,6 +967,11 @@ static int dpm_suspend_late(pm_message_t state) 
		if (!list_empty(&dev->power.entry))

			list_move(&dev->power.entry, &dpm_late_early_list);

		put_device(dev);



		if (pm_wakeup_pending()) {

			error = -EBUSY;

			break;

		}

	}

	mutex_unlock(&dpm_list_mtx);

	if (error)

drivers/base/power/sysfs.c

+49 −5
Original line number Diff line number Diff line
@@ -314,22 +314,41 @@ static ssize_t wakeup_active_count_show(struct device *dev, 


static DEVICE_ATTR(wakeup_active_count, 0444, wakeup_active_count_show, NULL);



static ssize_t wakeup_hit_count_show(struct device *dev,

				struct device_attribute *attr, char *buf)

static ssize_t wakeup_abort_count_show(struct device *dev,

					struct device_attribute *attr,

					char *buf)

{

	unsigned long count = 0;

	bool enabled = false;



	spin_lock_irq(&dev->power.lock);

	if (dev->power.wakeup) {

		count = dev->power.wakeup->wakeup_count;

		enabled = true;

	}

	spin_unlock_irq(&dev->power.lock);

	return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n");

}



static DEVICE_ATTR(wakeup_abort_count, 0444, wakeup_abort_count_show, NULL);



static ssize_t wakeup_expire_count_show(struct device *dev,

					struct device_attribute *attr,

					char *buf)

{

	unsigned long count = 0;

	bool enabled = false;



	spin_lock_irq(&dev->power.lock);

	if (dev->power.wakeup) {

		count = dev->power.wakeup->hit_count;

		count = dev->power.wakeup->expire_count;

		enabled = true;

	}

	spin_unlock_irq(&dev->power.lock);

	return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n");

}



static DEVICE_ATTR(wakeup_hit_count, 0444, wakeup_hit_count_show, NULL);

static DEVICE_ATTR(wakeup_expire_count, 0444, wakeup_expire_count_show, NULL);



static ssize_t wakeup_active_show(struct device *dev,

				struct device_attribute *attr, char *buf)
@@ -398,6 +417,27 @@ static ssize_t wakeup_last_time_show(struct device *dev, 
}



static DEVICE_ATTR(wakeup_last_time_ms, 0444, wakeup_last_time_show, NULL);



#ifdef CONFIG_PM_AUTOSLEEP

static ssize_t wakeup_prevent_sleep_time_show(struct device *dev,

					      struct device_attribute *attr,

					      char *buf)

{

	s64 msec = 0;

	bool enabled = false;



	spin_lock_irq(&dev->power.lock);

	if (dev->power.wakeup) {

		msec = ktime_to_ms(dev->power.wakeup->prevent_sleep_time);

		enabled = true;

	}

	spin_unlock_irq(&dev->power.lock);

	return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n");

}



static DEVICE_ATTR(wakeup_prevent_sleep_time_ms, 0444,

		   wakeup_prevent_sleep_time_show, NULL);

#endif /* CONFIG_PM_AUTOSLEEP */

#endif /* CONFIG_PM_SLEEP */



#ifdef CONFIG_PM_ADVANCED_DEBUG
@@ -486,11 +526,15 @@ static struct attribute *wakeup_attrs[] = { 
	&dev_attr_wakeup.attr,

	&dev_attr_wakeup_count.attr,

	&dev_attr_wakeup_active_count.attr,

	&dev_attr_wakeup_hit_count.attr,

	&dev_attr_wakeup_abort_count.attr,

	&dev_attr_wakeup_expire_count.attr,

	&dev_attr_wakeup_active.attr,

	&dev_attr_wakeup_total_time_ms.attr,

	&dev_attr_wakeup_max_time_ms.attr,

	&dev_attr_wakeup_last_time_ms.attr,

#ifdef CONFIG_PM_AUTOSLEEP

	&dev_attr_wakeup_prevent_sleep_time_ms.attr,

#endif

#endif

	NULL,

};