Lines Matching +full:autosuspend +full:- +full:delay
1 // SPDX-License-Identifier: GPL-2.0
3 * drivers/base/power/runtime.c - Helper functions for device runtime PM
26 if (dev->pm_domain) in __rpm_get_callback()
27 ops = &dev->pm_domain->ops; in __rpm_get_callback()
28 else if (dev->type && dev->type->pm) in __rpm_get_callback()
29 ops = dev->type->pm; in __rpm_get_callback()
30 else if (dev->class && dev->class->pm) in __rpm_get_callback()
31 ops = dev->class->pm; in __rpm_get_callback()
32 else if (dev->bus && dev->bus->pm) in __rpm_get_callback()
33 ops = dev->bus->pm; in __rpm_get_callback()
42 if (!cb && dev->driver && dev->driver->pm) in __rpm_get_callback()
43 cb = *(pm_callback_t *)((void *)dev->driver->pm + cb_offset); in __rpm_get_callback()
55 * update_pm_runtime_accounting - Update the time accounting of power states
69 if (dev->power.disable_depth > 0) in update_pm_runtime_accounting()
72 last = dev->power.accounting_timestamp; in update_pm_runtime_accounting()
75 dev->power.accounting_timestamp = now; in update_pm_runtime_accounting()
85 delta = now - last; in update_pm_runtime_accounting()
87 if (dev->power.runtime_status == RPM_SUSPENDED) in update_pm_runtime_accounting()
88 dev->power.suspended_time += delta; in update_pm_runtime_accounting()
90 dev->power.active_time += delta; in update_pm_runtime_accounting()
96 dev->power.runtime_status = status; in __update_runtime_status()
104 spin_lock_irqsave(&dev->power.lock, flags); in rpm_get_accounted_time()
107 time = suspended ? dev->power.suspended_time : dev->power.active_time; in rpm_get_accounted_time()
109 spin_unlock_irqrestore(&dev->power.lock, flags); in rpm_get_accounted_time()
126 * pm_runtime_deactivate_timer - Deactivate given device's suspend timer.
131 if (dev->power.timer_expires > 0) { in pm_runtime_deactivate_timer()
132 hrtimer_try_to_cancel(&dev->power.suspend_timer); in pm_runtime_deactivate_timer()
133 dev->power.timer_expires = 0; in pm_runtime_deactivate_timer()
138 * pm_runtime_cancel_pending - Deactivate suspend timer and cancel requests.
148 dev->power.request = RPM_REQ_NONE; in pm_runtime_cancel_pending()
152 * pm_runtime_autosuspend_expiration - Get a device's autosuspend-delay expiration time.
155 * Compute the autosuspend-delay expiration time based on the device's
156 * power.last_busy time. If the delay has already expired or is disabled
160 * This function may be called either with or without dev->power.lock held.
168 if (!dev->power.use_autosuspend) in pm_runtime_autosuspend_expiration()
171 autosuspend_delay = READ_ONCE(dev->power.autosuspend_delay); in pm_runtime_autosuspend_expiration()
175 expires = READ_ONCE(dev->power.last_busy); in pm_runtime_autosuspend_expiration()
186 return dev->power.memalloc_noio; in dev_memalloc_noio()
190 * pm_runtime_set_memalloc_noio - Set a device's memalloc_noio flag.
225 /* hold power lock since bitfield is not SMP-safe. */ in pm_runtime_set_memalloc_noio()
226 spin_lock_irq(&dev->power.lock); in pm_runtime_set_memalloc_noio()
227 enabled = dev->power.memalloc_noio; in pm_runtime_set_memalloc_noio()
228 dev->power.memalloc_noio = enable; in pm_runtime_set_memalloc_noio()
229 spin_unlock_irq(&dev->power.lock); in pm_runtime_set_memalloc_noio()
238 dev = dev->parent; in pm_runtime_set_memalloc_noio()
255 * rpm_check_suspend_allowed - Test whether a device may be suspended.
262 if (dev->power.runtime_error) in rpm_check_suspend_allowed()
263 retval = -EINVAL; in rpm_check_suspend_allowed()
264 else if (dev->power.disable_depth > 0) in rpm_check_suspend_allowed()
265 retval = -EACCES; in rpm_check_suspend_allowed()
266 else if (atomic_read(&dev->power.usage_count) > 0) in rpm_check_suspend_allowed()
267 retval = -EAGAIN; in rpm_check_suspend_allowed()
268 else if (!dev->power.ignore_children && in rpm_check_suspend_allowed()
269 atomic_read(&dev->power.child_count)) in rpm_check_suspend_allowed()
270 retval = -EBUSY; in rpm_check_suspend_allowed()
273 else if ((dev->power.deferred_resume in rpm_check_suspend_allowed()
274 && dev->power.runtime_status == RPM_SUSPENDING) in rpm_check_suspend_allowed()
275 || (dev->power.request_pending in rpm_check_suspend_allowed()
276 && dev->power.request == RPM_REQ_RESUME)) in rpm_check_suspend_allowed()
277 retval = -EAGAIN; in rpm_check_suspend_allowed()
279 retval = -EPERM; in rpm_check_suspend_allowed()
280 else if (dev->power.runtime_status == RPM_SUSPENDED) in rpm_check_suspend_allowed()
290 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in rpm_get_suppliers()
294 if (!(link->flags & DL_FLAG_PM_RUNTIME)) in rpm_get_suppliers()
297 retval = pm_runtime_get_sync(link->supplier); in rpm_get_suppliers()
299 if (retval < 0 && retval != -EACCES) { in rpm_get_suppliers()
300 pm_runtime_put_noidle(link->supplier); in rpm_get_suppliers()
303 refcount_inc(&link->rpm_active); in rpm_get_suppliers()
312 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in rpm_put_suppliers()
315 while (refcount_dec_not_one(&link->rpm_active)) in rpm_put_suppliers()
316 pm_runtime_put(link->supplier); in rpm_put_suppliers()
321 * __rpm_callback - Run a given runtime PM callback for a given device.
326 __releases(&dev->power.lock) __acquires(&dev->power.lock) in __rpm_callback()
329 bool use_links = dev->power.links_count > 0; in __rpm_callback()
331 if (dev->power.irq_safe) { in __rpm_callback()
332 spin_unlock(&dev->power.lock); in __rpm_callback()
334 spin_unlock_irq(&dev->power.lock); in __rpm_callback()
343 if (use_links && dev->power.runtime_status == RPM_RESUMING) { in __rpm_callback()
356 if (dev->power.irq_safe) { in __rpm_callback()
357 spin_lock(&dev->power.lock); in __rpm_callback()
367 && ((dev->power.runtime_status == RPM_SUSPENDING && !retval) in __rpm_callback()
368 || (dev->power.runtime_status == RPM_RESUMING && retval))) { in __rpm_callback()
377 spin_lock_irq(&dev->power.lock); in __rpm_callback()
384 * rpm_idle - Notify device bus type if the device can be suspended.
390 * the RPM_ASYNC flag is set then queue an idle-notification request; otherwise
391 * run the ->runtime_idle() callback directly. If the ->runtime_idle callback
394 * This function must be called under dev->power.lock with interrupts disabled.
407 else if (dev->power.runtime_status != RPM_ACTIVE) in rpm_idle()
408 retval = -EAGAIN; in rpm_idle()
414 else if (dev->power.request_pending && in rpm_idle()
415 dev->power.request > RPM_REQ_IDLE) in rpm_idle()
416 retval = -EAGAIN; in rpm_idle()
419 else if (dev->power.idle_notification) in rpm_idle()
420 retval = -EINPROGRESS; in rpm_idle()
425 dev->power.request = RPM_REQ_NONE; in rpm_idle()
427 if (dev->power.no_callbacks) in rpm_idle()
432 dev->power.request = RPM_REQ_IDLE; in rpm_idle()
433 if (!dev->power.request_pending) { in rpm_idle()
434 dev->power.request_pending = true; in rpm_idle()
435 queue_work(pm_wq, &dev->power.work); in rpm_idle()
441 dev->power.idle_notification = true; in rpm_idle()
448 dev->power.idle_notification = false; in rpm_idle()
449 wake_up_all(&dev->power.wait_queue); in rpm_idle()
457 * rpm_callback - Run a given runtime PM callback for a given device.
466 return -ENOSYS; in rpm_callback()
468 if (dev->power.memalloc_noio) { in rpm_callback()
487 dev->power.runtime_error = retval; in rpm_callback()
488 return retval != -EACCES ? retval : -EIO; in rpm_callback()
492 * rpm_suspend - Carry out runtime suspend of given device.
497 * Cancel a pending idle notification, autosuspend or suspend. If
501 * otherwise run the ->runtime_suspend() callback directly. When
502 * ->runtime_suspend succeeded, if a deferred resume was requested while
505 * ignore_children of parent->power and irq_safe of dev->power are not set).
506 * If ->runtime_suspend failed with -EAGAIN or -EBUSY, and if the RPM_AUTO
507 * flag is set and the next autosuspend-delay expiration time is in the
508 * future, schedule another autosuspend attempt.
510 * This function must be called under dev->power.lock with interrupts disabled.
513 __releases(&dev->power.lock) __acquires(&dev->power.lock) in rpm_suspend()
527 if (dev->power.runtime_status == RPM_RESUMING && !(rpmflags & RPM_ASYNC)) in rpm_suspend()
528 retval = -EAGAIN; in rpm_suspend()
534 && dev->power.runtime_status != RPM_SUSPENDING) { in rpm_suspend()
539 dev->power.request = RPM_REQ_NONE; in rpm_suspend()
543 * set to expire at or before the autosuspend delay, in rpm_suspend()
548 if (!(dev->power.timer_expires && in rpm_suspend()
549 dev->power.timer_expires <= expires)) { in rpm_suspend()
554 u64 slack = (u64)READ_ONCE(dev->power.autosuspend_delay) * in rpm_suspend()
557 dev->power.timer_expires = expires; in rpm_suspend()
558 hrtimer_start_range_ns(&dev->power.suspend_timer, in rpm_suspend()
563 dev->power.timer_autosuspends = 1; in rpm_suspend()
571 if (dev->power.runtime_status == RPM_SUSPENDING) { in rpm_suspend()
575 retval = -EINPROGRESS; in rpm_suspend()
579 if (dev->power.irq_safe) { in rpm_suspend()
580 spin_unlock(&dev->power.lock); in rpm_suspend()
584 spin_lock(&dev->power.lock); in rpm_suspend()
590 prepare_to_wait(&dev->power.wait_queue, &wait, in rpm_suspend()
592 if (dev->power.runtime_status != RPM_SUSPENDING) in rpm_suspend()
595 spin_unlock_irq(&dev->power.lock); in rpm_suspend()
599 spin_lock_irq(&dev->power.lock); in rpm_suspend()
601 finish_wait(&dev->power.wait_queue, &wait); in rpm_suspend()
605 if (dev->power.no_callbacks) in rpm_suspend()
610 dev->power.request = (rpmflags & RPM_AUTO) ? in rpm_suspend()
612 if (!dev->power.request_pending) { in rpm_suspend()
613 dev->power.request_pending = true; in rpm_suspend()
614 queue_work(pm_wq, &dev->power.work); in rpm_suspend()
632 if (dev->parent) { in rpm_suspend()
633 parent = dev->parent; in rpm_suspend()
634 atomic_add_unless(&parent->power.child_count, -1, 0); in rpm_suspend()
636 wake_up_all(&dev->power.wait_queue); in rpm_suspend()
638 if (dev->power.deferred_resume) { in rpm_suspend()
639 dev->power.deferred_resume = false; in rpm_suspend()
641 retval = -EAGAIN; in rpm_suspend()
646 if (parent && !parent->power.ignore_children && !dev->power.irq_safe) { in rpm_suspend()
647 spin_unlock(&dev->power.lock); in rpm_suspend()
649 spin_lock(&parent->power.lock); in rpm_suspend()
651 spin_unlock(&parent->power.lock); in rpm_suspend()
653 spin_lock(&dev->power.lock); in rpm_suspend()
664 dev->power.deferred_resume = false; in rpm_suspend()
665 wake_up_all(&dev->power.wait_queue); in rpm_suspend()
667 if (retval == -EAGAIN || retval == -EBUSY) { in rpm_suspend()
668 dev->power.runtime_error = 0; in rpm_suspend()
671 * If the callback routine failed an autosuspend, and in rpm_suspend()
673 * is a new autosuspend expiration time, automatically in rpm_suspend()
674 * reschedule another autosuspend. in rpm_suspend()
686 * rpm_resume - Carry out runtime resume of given device.
697 * ->runtime_resume() callback directly. Queue an idle notification for the
700 * This function must be called under dev->power.lock with interrupts disabled.
703 __releases(&dev->power.lock) __acquires(&dev->power.lock) in rpm_resume()
712 if (dev->power.runtime_error) in rpm_resume()
713 retval = -EINVAL; in rpm_resume()
714 else if (dev->power.disable_depth == 1 && dev->power.is_suspended in rpm_resume()
715 && dev->power.runtime_status == RPM_ACTIVE) in rpm_resume()
717 else if (dev->power.disable_depth > 0) in rpm_resume()
718 retval = -EACCES; in rpm_resume()
724 * optimization: If an autosuspend timer is running, leave it running in rpm_resume()
728 dev->power.request = RPM_REQ_NONE; in rpm_resume()
729 if (!dev->power.timer_autosuspends) in rpm_resume()
732 if (dev->power.runtime_status == RPM_ACTIVE) { in rpm_resume()
737 if (dev->power.runtime_status == RPM_RESUMING in rpm_resume()
738 || dev->power.runtime_status == RPM_SUSPENDING) { in rpm_resume()
742 if (dev->power.runtime_status == RPM_SUSPENDING) in rpm_resume()
743 dev->power.deferred_resume = true; in rpm_resume()
745 retval = -EINPROGRESS; in rpm_resume()
749 if (dev->power.irq_safe) { in rpm_resume()
750 spin_unlock(&dev->power.lock); in rpm_resume()
754 spin_lock(&dev->power.lock); in rpm_resume()
760 prepare_to_wait(&dev->power.wait_queue, &wait, in rpm_resume()
762 if (dev->power.runtime_status != RPM_RESUMING in rpm_resume()
763 && dev->power.runtime_status != RPM_SUSPENDING) in rpm_resume()
766 spin_unlock_irq(&dev->power.lock); in rpm_resume()
770 spin_lock_irq(&dev->power.lock); in rpm_resume()
772 finish_wait(&dev->power.wait_queue, &wait); in rpm_resume()
781 if (dev->power.no_callbacks && !parent && dev->parent) { in rpm_resume()
782 spin_lock_nested(&dev->parent->power.lock, SINGLE_DEPTH_NESTING); in rpm_resume()
783 if (dev->parent->power.disable_depth > 0 in rpm_resume()
784 || dev->parent->power.ignore_children in rpm_resume()
785 || dev->parent->power.runtime_status == RPM_ACTIVE) { in rpm_resume()
786 atomic_inc(&dev->parent->power.child_count); in rpm_resume()
787 spin_unlock(&dev->parent->power.lock); in rpm_resume()
791 spin_unlock(&dev->parent->power.lock); in rpm_resume()
796 dev->power.request = RPM_REQ_RESUME; in rpm_resume()
797 if (!dev->power.request_pending) { in rpm_resume()
798 dev->power.request_pending = true; in rpm_resume()
799 queue_work(pm_wq, &dev->power.work); in rpm_resume()
805 if (!parent && dev->parent) { in rpm_resume()
808 * necessary. Not needed if dev is irq-safe; then the in rpm_resume()
811 parent = dev->parent; in rpm_resume()
812 if (dev->power.irq_safe) in rpm_resume()
814 spin_unlock(&dev->power.lock); in rpm_resume()
818 spin_lock(&parent->power.lock); in rpm_resume()
823 if (!parent->power.disable_depth in rpm_resume()
824 && !parent->power.ignore_children) { in rpm_resume()
826 if (parent->power.runtime_status != RPM_ACTIVE) in rpm_resume()
827 retval = -EBUSY; in rpm_resume()
829 spin_unlock(&parent->power.lock); in rpm_resume()
831 spin_lock(&dev->power.lock); in rpm_resume()
838 if (dev->power.no_callbacks) in rpm_resume()
856 atomic_inc(&parent->power.child_count); in rpm_resume()
858 wake_up_all(&dev->power.wait_queue); in rpm_resume()
864 if (parent && !dev->power.irq_safe) { in rpm_resume()
865 spin_unlock_irq(&dev->power.lock); in rpm_resume()
869 spin_lock_irq(&dev->power.lock); in rpm_resume()
878 * pm_runtime_work - Universal runtime PM work function.
889 spin_lock_irq(&dev->power.lock); in pm_runtime_work()
891 if (!dev->power.request_pending) in pm_runtime_work()
894 req = dev->power.request; in pm_runtime_work()
895 dev->power.request = RPM_REQ_NONE; in pm_runtime_work()
896 dev->power.request_pending = false; in pm_runtime_work()
916 spin_unlock_irq(&dev->power.lock); in pm_runtime_work()
920 * pm_suspend_timer_fn - Timer function for pm_schedule_suspend().
931 spin_lock_irqsave(&dev->power.lock, flags); in pm_suspend_timer_fn()
933 expires = dev->power.timer_expires; in pm_suspend_timer_fn()
939 dev->power.timer_expires = 0; in pm_suspend_timer_fn()
940 rpm_suspend(dev, dev->power.timer_autosuspends ? in pm_suspend_timer_fn()
944 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_suspend_timer_fn()
950 * pm_schedule_suspend - Set up a timer to submit a suspend request in future.
952 * @delay: Time to wait before submitting a suspend request, in milliseconds.
954 int pm_schedule_suspend(struct device *dev, unsigned int delay) in pm_schedule_suspend() argument
960 spin_lock_irqsave(&dev->power.lock, flags); in pm_schedule_suspend()
962 if (!delay) { in pm_schedule_suspend()
974 expires = ktime_get_mono_fast_ns() + (u64)delay * NSEC_PER_MSEC; in pm_schedule_suspend()
975 dev->power.timer_expires = expires; in pm_schedule_suspend()
976 dev->power.timer_autosuspends = 0; in pm_schedule_suspend()
977 hrtimer_start(&dev->power.suspend_timer, expires, HRTIMER_MODE_ABS); in pm_schedule_suspend()
980 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_schedule_suspend()
987 * __pm_runtime_idle - Entry point for runtime idle operations.
1004 if (!atomic_dec_and_test(&dev->power.usage_count)) { in __pm_runtime_idle()
1010 might_sleep_if(!(rpmflags & RPM_ASYNC) && !dev->power.irq_safe); in __pm_runtime_idle()
1012 spin_lock_irqsave(&dev->power.lock, flags); in __pm_runtime_idle()
1014 spin_unlock_irqrestore(&dev->power.lock, flags); in __pm_runtime_idle()
1021 * __pm_runtime_suspend - Entry point for runtime put/suspend operations.
1038 if (!atomic_dec_and_test(&dev->power.usage_count)) { in __pm_runtime_suspend()
1044 might_sleep_if(!(rpmflags & RPM_ASYNC) && !dev->power.irq_safe); in __pm_runtime_suspend()
1046 spin_lock_irqsave(&dev->power.lock, flags); in __pm_runtime_suspend()
1048 spin_unlock_irqrestore(&dev->power.lock, flags); in __pm_runtime_suspend()
1055 * __pm_runtime_resume - Entry point for runtime resume operations.
1070 might_sleep_if(!(rpmflags & RPM_ASYNC) && !dev->power.irq_safe && in __pm_runtime_resume()
1071 dev->power.runtime_status != RPM_ACTIVE); in __pm_runtime_resume()
1074 atomic_inc(&dev->power.usage_count); in __pm_runtime_resume()
1076 spin_lock_irqsave(&dev->power.lock, flags); in __pm_runtime_resume()
1078 spin_unlock_irqrestore(&dev->power.lock, flags); in __pm_runtime_resume()
1085 * pm_runtime_get_if_active - Conditionally bump up device usage counter.
1089 * Return -EINVAL if runtime PM is disabled for @dev.
1111 spin_lock_irqsave(&dev->power.lock, flags); in pm_runtime_get_if_active()
1112 if (dev->power.disable_depth > 0) { in pm_runtime_get_if_active()
1113 retval = -EINVAL; in pm_runtime_get_if_active()
1114 } else if (dev->power.runtime_status != RPM_ACTIVE) { in pm_runtime_get_if_active()
1118 atomic_inc(&dev->power.usage_count); in pm_runtime_get_if_active()
1120 retval = atomic_inc_not_zero(&dev->power.usage_count); in pm_runtime_get_if_active()
1123 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_runtime_get_if_active()
1130 * __pm_runtime_set_status - Set runtime PM status of a device.
1139 * set to RPM_ACTIVE, so -EBUSY is returned in that case.
1155 struct device *parent = dev->parent; in __pm_runtime_set_status()
1160 return -EINVAL; in __pm_runtime_set_status()
1162 spin_lock_irq(&dev->power.lock); in __pm_runtime_set_status()
1165 * Prevent PM-runtime from being enabled for the device or return an in __pm_runtime_set_status()
1168 if (dev->power.runtime_error || dev->power.disable_depth) in __pm_runtime_set_status()
1169 dev->power.disable_depth++; in __pm_runtime_set_status()
1171 error = -EAGAIN; in __pm_runtime_set_status()
1173 spin_unlock_irq(&dev->power.lock); in __pm_runtime_set_status()
1194 spin_lock_irq(&dev->power.lock); in __pm_runtime_set_status()
1196 if (dev->power.runtime_status == status || !parent) in __pm_runtime_set_status()
1200 atomic_add_unless(&parent->power.child_count, -1, 0); in __pm_runtime_set_status()
1201 notify_parent = !parent->power.ignore_children; in __pm_runtime_set_status()
1203 spin_lock_nested(&parent->power.lock, SINGLE_DEPTH_NESTING); in __pm_runtime_set_status()
1210 if (!parent->power.disable_depth in __pm_runtime_set_status()
1211 && !parent->power.ignore_children in __pm_runtime_set_status()
1212 && parent->power.runtime_status != RPM_ACTIVE) { in __pm_runtime_set_status()
1216 error = -EBUSY; in __pm_runtime_set_status()
1217 } else if (dev->power.runtime_status == RPM_SUSPENDED) { in __pm_runtime_set_status()
1218 atomic_inc(&parent->power.child_count); in __pm_runtime_set_status()
1221 spin_unlock(&parent->power.lock); in __pm_runtime_set_status()
1232 dev->power.runtime_error = 0; in __pm_runtime_set_status()
1235 spin_unlock_irq(&dev->power.lock); in __pm_runtime_set_status()
1255 * __pm_runtime_barrier - Cancel pending requests and wait for completions.
1261 * Should be called under dev->power.lock with interrupts disabled.
1267 if (dev->power.request_pending) { in __pm_runtime_barrier()
1268 dev->power.request = RPM_REQ_NONE; in __pm_runtime_barrier()
1269 spin_unlock_irq(&dev->power.lock); in __pm_runtime_barrier()
1271 cancel_work_sync(&dev->power.work); in __pm_runtime_barrier()
1273 spin_lock_irq(&dev->power.lock); in __pm_runtime_barrier()
1274 dev->power.request_pending = false; in __pm_runtime_barrier()
1277 if (dev->power.runtime_status == RPM_SUSPENDING in __pm_runtime_barrier()
1278 || dev->power.runtime_status == RPM_RESUMING in __pm_runtime_barrier()
1279 || dev->power.idle_notification) { in __pm_runtime_barrier()
1282 /* Suspend, wake-up or idle notification in progress. */ in __pm_runtime_barrier()
1284 prepare_to_wait(&dev->power.wait_queue, &wait, in __pm_runtime_barrier()
1286 if (dev->power.runtime_status != RPM_SUSPENDING in __pm_runtime_barrier()
1287 && dev->power.runtime_status != RPM_RESUMING in __pm_runtime_barrier()
1288 && !dev->power.idle_notification) in __pm_runtime_barrier()
1290 spin_unlock_irq(&dev->power.lock); in __pm_runtime_barrier()
1294 spin_lock_irq(&dev->power.lock); in __pm_runtime_barrier()
1296 finish_wait(&dev->power.wait_queue, &wait); in __pm_runtime_barrier()
1301 * pm_runtime_barrier - Flush pending requests and wait for completions.
1319 spin_lock_irq(&dev->power.lock); in pm_runtime_barrier()
1321 if (dev->power.request_pending in pm_runtime_barrier()
1322 && dev->power.request == RPM_REQ_RESUME) { in pm_runtime_barrier()
1329 spin_unlock_irq(&dev->power.lock); in pm_runtime_barrier()
1337 * __pm_runtime_disable - Disable runtime PM of a device.
1352 spin_lock_irq(&dev->power.lock); in __pm_runtime_disable()
1354 if (dev->power.disable_depth > 0) { in __pm_runtime_disable()
1355 dev->power.disable_depth++; in __pm_runtime_disable()
1364 if (check_resume && dev->power.request_pending in __pm_runtime_disable()
1365 && dev->power.request == RPM_REQ_RESUME) { in __pm_runtime_disable()
1377 /* Update time accounting before disabling PM-runtime. */ in __pm_runtime_disable()
1380 if (!dev->power.disable_depth++) in __pm_runtime_disable()
1384 spin_unlock_irq(&dev->power.lock); in __pm_runtime_disable()
1389 * pm_runtime_enable - Enable runtime PM of a device.
1396 spin_lock_irqsave(&dev->power.lock, flags); in pm_runtime_enable()
1398 if (dev->power.disable_depth > 0) { in pm_runtime_enable()
1399 dev->power.disable_depth--; in pm_runtime_enable()
1402 if (!dev->power.disable_depth) in pm_runtime_enable()
1403 dev->power.accounting_timestamp = ktime_get_mono_fast_ns(); in pm_runtime_enable()
1408 WARN(!dev->power.disable_depth && in pm_runtime_enable()
1409 dev->power.runtime_status == RPM_SUSPENDED && in pm_runtime_enable()
1410 !dev->power.ignore_children && in pm_runtime_enable()
1411 atomic_read(&dev->power.child_count) > 0, in pm_runtime_enable()
1415 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_runtime_enable()
1420 * pm_runtime_forbid - Block runtime PM of a device.
1429 spin_lock_irq(&dev->power.lock); in pm_runtime_forbid()
1430 if (!dev->power.runtime_auto) in pm_runtime_forbid()
1433 dev->power.runtime_auto = false; in pm_runtime_forbid()
1434 atomic_inc(&dev->power.usage_count); in pm_runtime_forbid()
1438 spin_unlock_irq(&dev->power.lock); in pm_runtime_forbid()
1443 * pm_runtime_allow - Unblock runtime PM of a device.
1450 spin_lock_irq(&dev->power.lock); in pm_runtime_allow()
1451 if (dev->power.runtime_auto) in pm_runtime_allow()
1454 dev->power.runtime_auto = true; in pm_runtime_allow()
1455 if (atomic_dec_and_test(&dev->power.usage_count)) in pm_runtime_allow()
1461 spin_unlock_irq(&dev->power.lock); in pm_runtime_allow()
1466 * pm_runtime_no_callbacks - Ignore runtime PM callbacks for a device.
1470 * device is power-managed through its parent and has no runtime PM
1475 spin_lock_irq(&dev->power.lock); in pm_runtime_no_callbacks()
1476 dev->power.no_callbacks = 1; in pm_runtime_no_callbacks()
1477 spin_unlock_irq(&dev->power.lock); in pm_runtime_no_callbacks()
1484 * pm_runtime_irq_safe - Leave interrupts disabled during callbacks.
1488 * ->runtime_suspend() and ->runtime_resume() callbacks for this device should
1491 * the parent from runtime suspending -- otherwise an irq-safe child might have
1492 * to wait for a non-irq-safe parent.
1496 if (dev->parent) in pm_runtime_irq_safe()
1497 pm_runtime_get_sync(dev->parent); in pm_runtime_irq_safe()
1498 spin_lock_irq(&dev->power.lock); in pm_runtime_irq_safe()
1499 dev->power.irq_safe = 1; in pm_runtime_irq_safe()
1500 spin_unlock_irq(&dev->power.lock); in pm_runtime_irq_safe()
1505 * update_autosuspend - Handle a change to a device's autosuspend settings.
1510 * Prevent runtime suspend if the new delay is negative and use_autosuspend is
1513 * This function must be called under dev->power.lock with interrupts disabled.
1517 int delay = dev->power.autosuspend_delay; in update_autosuspend() local
1520 if (dev->power.use_autosuspend && delay < 0) { in update_autosuspend()
1524 atomic_inc(&dev->power.usage_count); in update_autosuspend()
1536 atomic_dec(&dev->power.usage_count); in update_autosuspend()
1538 /* Maybe we can autosuspend now. */ in update_autosuspend()
1544 * pm_runtime_set_autosuspend_delay - Set a device's autosuspend_delay value.
1546 * @delay: Value of the new delay in milliseconds.
1552 void pm_runtime_set_autosuspend_delay(struct device *dev, int delay) in pm_runtime_set_autosuspend_delay() argument
1556 spin_lock_irq(&dev->power.lock); in pm_runtime_set_autosuspend_delay()
1557 old_delay = dev->power.autosuspend_delay; in pm_runtime_set_autosuspend_delay()
1558 old_use = dev->power.use_autosuspend; in pm_runtime_set_autosuspend_delay()
1559 dev->power.autosuspend_delay = delay; in pm_runtime_set_autosuspend_delay()
1561 spin_unlock_irq(&dev->power.lock); in pm_runtime_set_autosuspend_delay()
1566 * __pm_runtime_use_autosuspend - Set a device's use_autosuspend flag.
1577 spin_lock_irq(&dev->power.lock); in __pm_runtime_use_autosuspend()
1578 old_delay = dev->power.autosuspend_delay; in __pm_runtime_use_autosuspend()
1579 old_use = dev->power.use_autosuspend; in __pm_runtime_use_autosuspend()
1580 dev->power.use_autosuspend = use; in __pm_runtime_use_autosuspend()
1582 spin_unlock_irq(&dev->power.lock); in __pm_runtime_use_autosuspend()
1587 * pm_runtime_init - Initialize runtime PM fields in given device object.
1592 dev->power.runtime_status = RPM_SUSPENDED; in pm_runtime_init()
1593 dev->power.idle_notification = false; in pm_runtime_init()
1595 dev->power.disable_depth = 1; in pm_runtime_init()
1596 atomic_set(&dev->power.usage_count, 0); in pm_runtime_init()
1598 dev->power.runtime_error = 0; in pm_runtime_init()
1600 atomic_set(&dev->power.child_count, 0); in pm_runtime_init()
1602 dev->power.runtime_auto = true; in pm_runtime_init()
1604 dev->power.request_pending = false; in pm_runtime_init()
1605 dev->power.request = RPM_REQ_NONE; in pm_runtime_init()
1606 dev->power.deferred_resume = false; in pm_runtime_init()
1607 INIT_WORK(&dev->power.work, pm_runtime_work); in pm_runtime_init()
1609 dev->power.timer_expires = 0; in pm_runtime_init()
1610 hrtimer_init(&dev->power.suspend_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); in pm_runtime_init()
1611 dev->power.suspend_timer.function = pm_suspend_timer_fn; in pm_runtime_init()
1613 init_waitqueue_head(&dev->power.wait_queue); in pm_runtime_init()
1617 * pm_runtime_reinit - Re-initialize runtime PM fields in given device object.
1618 * @dev: Device object to re-initialize.
1623 if (dev->power.runtime_status == RPM_ACTIVE) in pm_runtime_reinit()
1625 if (dev->power.irq_safe) { in pm_runtime_reinit()
1626 spin_lock_irq(&dev->power.lock); in pm_runtime_reinit()
1627 dev->power.irq_safe = 0; in pm_runtime_reinit()
1628 spin_unlock_irq(&dev->power.lock); in pm_runtime_reinit()
1629 if (dev->parent) in pm_runtime_reinit()
1630 pm_runtime_put(dev->parent); in pm_runtime_reinit()
1636 * pm_runtime_remove - Prepare for removing a device from device hierarchy.
1646 * pm_runtime_get_suppliers - Resume and reference-count supplier devices.
1656 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in pm_runtime_get_suppliers()
1658 if (link->flags & DL_FLAG_PM_RUNTIME) { in pm_runtime_get_suppliers()
1659 link->supplier_preactivated = true; in pm_runtime_get_suppliers()
1660 refcount_inc(&link->rpm_active); in pm_runtime_get_suppliers()
1661 pm_runtime_get_sync(link->supplier); in pm_runtime_get_suppliers()
1668 * pm_runtime_put_suppliers - Drop references to supplier devices.
1678 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in pm_runtime_put_suppliers()
1680 if (link->supplier_preactivated) { in pm_runtime_put_suppliers()
1681 link->supplier_preactivated = false; in pm_runtime_put_suppliers()
1682 if (refcount_dec_not_one(&link->rpm_active)) in pm_runtime_put_suppliers()
1683 pm_runtime_put(link->supplier); in pm_runtime_put_suppliers()
1691 spin_lock_irq(&dev->power.lock); in pm_runtime_new_link()
1692 dev->power.links_count++; in pm_runtime_new_link()
1693 spin_unlock_irq(&dev->power.lock); in pm_runtime_new_link()
1698 spin_lock_irq(&dev->power.lock); in pm_runtime_drop_link_count()
1699 WARN_ON(dev->power.links_count == 0); in pm_runtime_drop_link_count()
1700 dev->power.links_count--; in pm_runtime_drop_link_count()
1701 spin_unlock_irq(&dev->power.lock); in pm_runtime_drop_link_count()
1705 * pm_runtime_drop_link - Prepare for device link removal.
1714 if (!(link->flags & DL_FLAG_PM_RUNTIME)) in pm_runtime_drop_link()
1717 pm_runtime_drop_link_count(link->consumer); in pm_runtime_drop_link()
1719 while (refcount_dec_not_one(&link->rpm_active)) in pm_runtime_drop_link()
1720 pm_runtime_put(link->supplier); in pm_runtime_drop_link()
1725 return atomic_read(&dev->power.usage_count) <= 1 && in pm_runtime_need_not_resume()
1726 (atomic_read(&dev->power.child_count) == 0 || in pm_runtime_need_not_resume()
1727 dev->power.ignore_children); in pm_runtime_need_not_resume()
1731 * pm_runtime_force_suspend - Force a device into suspend state if needed.
1735 * if it is active, invoke its ->runtime_suspend callback to suspend it and
1738 * the system-wide transition under way, decrement its parent's children counter
1744 * system-wide PM transitions to sleep states. It assumes that the analogous
1763 * If the device can stay in suspend after the system-wide transition in pm_runtime_force_suspend()
1782 * pm_runtime_force_resume - Force a device into resume state if needed.