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_noidle(link->supplier); in __rpm_put_suppliers()
319 pm_request_idle(link->supplier); in __rpm_put_suppliers()
333 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in rpm_suspend_suppliers()
335 pm_request_idle(link->supplier); in rpm_suspend_suppliers()
341 * __rpm_callback - Run a given runtime PM callback for a given device.
346 __releases(&dev->power.lock) __acquires(&dev->power.lock) in __rpm_callback()
349 bool use_links = dev->power.links_count > 0; in __rpm_callback()
351 if (dev->power.irq_safe) { in __rpm_callback()
352 spin_unlock(&dev->power.lock); in __rpm_callback()
354 spin_unlock_irq(&dev->power.lock); in __rpm_callback()
363 if (use_links && dev->power.runtime_status == RPM_RESUMING) { in __rpm_callback()
379 if (dev->power.irq_safe) { in __rpm_callback()
380 spin_lock(&dev->power.lock); in __rpm_callback()
390 && ((dev->power.runtime_status == RPM_SUSPENDING && !retval) in __rpm_callback()
391 || (dev->power.runtime_status == RPM_RESUMING && retval))) { in __rpm_callback()
400 spin_lock_irq(&dev->power.lock); in __rpm_callback()
407 * rpm_idle - Notify device bus type if the device can be suspended.
413 * the RPM_ASYNC flag is set then queue an idle-notification request; otherwise
414 * run the ->runtime_idle() callback directly. If the ->runtime_idle callback
417 * This function must be called under dev->power.lock with interrupts disabled.
430 else if (dev->power.runtime_status != RPM_ACTIVE) in rpm_idle()
431 retval = -EAGAIN; in rpm_idle()
437 else if (dev->power.request_pending && in rpm_idle()
438 dev->power.request > RPM_REQ_IDLE) in rpm_idle()
439 retval = -EAGAIN; in rpm_idle()
442 else if (dev->power.idle_notification) in rpm_idle()
443 retval = -EINPROGRESS; in rpm_idle()
448 dev->power.request = RPM_REQ_NONE; in rpm_idle()
453 if (!callback || dev->power.no_callbacks) in rpm_idle()
458 dev->power.request = RPM_REQ_IDLE; in rpm_idle()
459 if (!dev->power.request_pending) { in rpm_idle()
460 dev->power.request_pending = true; in rpm_idle()
461 queue_work(pm_wq, &dev->power.work); in rpm_idle()
467 dev->power.idle_notification = true; in rpm_idle()
471 dev->power.idle_notification = false; in rpm_idle()
472 wake_up_all(&dev->power.wait_queue); in rpm_idle()
480 * rpm_callback - Run a given runtime PM callback for a given device.
488 if (dev->power.memalloc_noio) { in rpm_callback()
507 dev->power.runtime_error = retval; in rpm_callback()
508 return retval != -EACCES ? retval : -EIO; in rpm_callback()
512 * rpm_suspend - Carry out runtime suspend of given device.
517 * Cancel a pending idle notification, autosuspend or suspend. If
521 * otherwise run the ->runtime_suspend() callback directly. When
522 * ->runtime_suspend succeeded, if a deferred resume was requested while
525 * ignore_children of parent->power and irq_safe of dev->power are not set).
526 * If ->runtime_suspend failed with -EAGAIN or -EBUSY, and if the RPM_AUTO
527 * flag is set and the next autosuspend-delay expiration time is in the
528 * future, schedule another autosuspend attempt.
530 * This function must be called under dev->power.lock with interrupts disabled.
533 __releases(&dev->power.lock) __acquires(&dev->power.lock) in rpm_suspend()
547 if (dev->power.runtime_status == RPM_RESUMING && !(rpmflags & RPM_ASYNC)) in rpm_suspend()
548 retval = -EAGAIN; in rpm_suspend()
554 && dev->power.runtime_status != RPM_SUSPENDING) { in rpm_suspend()
559 dev->power.request = RPM_REQ_NONE; in rpm_suspend()
563 * set to expire at or before the autosuspend delay, in rpm_suspend()
568 if (!(dev->power.timer_expires && in rpm_suspend()
569 dev->power.timer_expires <= expires)) { in rpm_suspend()
574 u64 slack = (u64)READ_ONCE(dev->power.autosuspend_delay) * in rpm_suspend()
577 dev->power.timer_expires = expires; in rpm_suspend()
578 hrtimer_start_range_ns(&dev->power.suspend_timer, in rpm_suspend()
583 dev->power.timer_autosuspends = 1; in rpm_suspend()
591 if (dev->power.runtime_status == RPM_SUSPENDING) { in rpm_suspend()
595 retval = -EINPROGRESS; in rpm_suspend()
599 if (dev->power.irq_safe) { in rpm_suspend()
600 spin_unlock(&dev->power.lock); in rpm_suspend()
604 spin_lock(&dev->power.lock); in rpm_suspend()
610 prepare_to_wait(&dev->power.wait_queue, &wait, in rpm_suspend()
612 if (dev->power.runtime_status != RPM_SUSPENDING) in rpm_suspend()
615 spin_unlock_irq(&dev->power.lock); in rpm_suspend()
619 spin_lock_irq(&dev->power.lock); in rpm_suspend()
621 finish_wait(&dev->power.wait_queue, &wait); in rpm_suspend()
625 if (dev->power.no_callbacks) in rpm_suspend()
630 dev->power.request = (rpmflags & RPM_AUTO) ? in rpm_suspend()
632 if (!dev->power.request_pending) { in rpm_suspend()
633 dev->power.request_pending = true; in rpm_suspend()
634 queue_work(pm_wq, &dev->power.work); in rpm_suspend()
652 if (dev->parent) { in rpm_suspend()
653 parent = dev->parent; in rpm_suspend()
654 atomic_add_unless(&parent->power.child_count, -1, 0); in rpm_suspend()
656 wake_up_all(&dev->power.wait_queue); in rpm_suspend()
658 if (dev->power.deferred_resume) { in rpm_suspend()
659 dev->power.deferred_resume = false; in rpm_suspend()
661 retval = -EAGAIN; in rpm_suspend()
665 if (dev->power.irq_safe) in rpm_suspend()
669 if (parent && !parent->power.ignore_children) { in rpm_suspend()
670 spin_unlock(&dev->power.lock); in rpm_suspend()
672 spin_lock(&parent->power.lock); in rpm_suspend()
674 spin_unlock(&parent->power.lock); in rpm_suspend()
676 spin_lock(&dev->power.lock); in rpm_suspend()
679 if (dev->power.links_count > 0) { in rpm_suspend()
680 spin_unlock_irq(&dev->power.lock); in rpm_suspend()
684 spin_lock_irq(&dev->power.lock); in rpm_suspend()
695 dev->power.deferred_resume = false; in rpm_suspend()
696 wake_up_all(&dev->power.wait_queue); in rpm_suspend()
698 if (retval == -EAGAIN || retval == -EBUSY) { in rpm_suspend()
699 dev->power.runtime_error = 0; in rpm_suspend()
702 * If the callback routine failed an autosuspend, and in rpm_suspend()
704 * is a new autosuspend expiration time, automatically in rpm_suspend()
705 * reschedule another autosuspend. in rpm_suspend()
717 * rpm_resume - Carry out runtime resume of given device.
728 * ->runtime_resume() callback directly. Queue an idle notification for the
731 * This function must be called under dev->power.lock with interrupts disabled.
734 __releases(&dev->power.lock) __acquires(&dev->power.lock) in rpm_resume()
743 if (dev->power.runtime_error) in rpm_resume()
744 retval = -EINVAL; in rpm_resume()
745 else if (dev->power.disable_depth == 1 && dev->power.is_suspended in rpm_resume()
746 && dev->power.runtime_status == RPM_ACTIVE) in rpm_resume()
748 else if (dev->power.disable_depth > 0) in rpm_resume()
749 retval = -EACCES; in rpm_resume()
755 * optimization: If an autosuspend timer is running, leave it running in rpm_resume()
759 dev->power.request = RPM_REQ_NONE; in rpm_resume()
760 if (!dev->power.timer_autosuspends) in rpm_resume()
763 if (dev->power.runtime_status == RPM_ACTIVE) { in rpm_resume()
768 if (dev->power.runtime_status == RPM_RESUMING in rpm_resume()
769 || dev->power.runtime_status == RPM_SUSPENDING) { in rpm_resume()
773 if (dev->power.runtime_status == RPM_SUSPENDING) in rpm_resume()
774 dev->power.deferred_resume = true; in rpm_resume()
776 retval = -EINPROGRESS; in rpm_resume()
780 if (dev->power.irq_safe) { in rpm_resume()
781 spin_unlock(&dev->power.lock); in rpm_resume()
785 spin_lock(&dev->power.lock); in rpm_resume()
791 prepare_to_wait(&dev->power.wait_queue, &wait, in rpm_resume()
793 if (dev->power.runtime_status != RPM_RESUMING in rpm_resume()
794 && dev->power.runtime_status != RPM_SUSPENDING) in rpm_resume()
797 spin_unlock_irq(&dev->power.lock); in rpm_resume()
801 spin_lock_irq(&dev->power.lock); in rpm_resume()
803 finish_wait(&dev->power.wait_queue, &wait); in rpm_resume()
812 if (dev->power.no_callbacks && !parent && dev->parent) { in rpm_resume()
813 spin_lock_nested(&dev->parent->power.lock, SINGLE_DEPTH_NESTING); in rpm_resume()
814 if (dev->parent->power.disable_depth > 0 in rpm_resume()
815 || dev->parent->power.ignore_children in rpm_resume()
816 || dev->parent->power.runtime_status == RPM_ACTIVE) { in rpm_resume()
817 atomic_inc(&dev->parent->power.child_count); in rpm_resume()
818 spin_unlock(&dev->parent->power.lock); in rpm_resume()
822 spin_unlock(&dev->parent->power.lock); in rpm_resume()
827 dev->power.request = RPM_REQ_RESUME; in rpm_resume()
828 if (!dev->power.request_pending) { in rpm_resume()
829 dev->power.request_pending = true; in rpm_resume()
830 queue_work(pm_wq, &dev->power.work); in rpm_resume()
836 if (!parent && dev->parent) { in rpm_resume()
839 * necessary. Not needed if dev is irq-safe; then the in rpm_resume()
842 parent = dev->parent; in rpm_resume()
843 if (dev->power.irq_safe) in rpm_resume()
845 spin_unlock(&dev->power.lock); in rpm_resume()
849 spin_lock(&parent->power.lock); in rpm_resume()
854 if (!parent->power.disable_depth in rpm_resume()
855 && !parent->power.ignore_children) { in rpm_resume()
857 if (parent->power.runtime_status != RPM_ACTIVE) in rpm_resume()
858 retval = -EBUSY; in rpm_resume()
860 spin_unlock(&parent->power.lock); in rpm_resume()
862 spin_lock(&dev->power.lock); in rpm_resume()
869 if (dev->power.no_callbacks) in rpm_resume()
887 atomic_inc(&parent->power.child_count); in rpm_resume()
889 wake_up_all(&dev->power.wait_queue); in rpm_resume()
895 if (parent && !dev->power.irq_safe) { in rpm_resume()
896 spin_unlock_irq(&dev->power.lock); in rpm_resume()
900 spin_lock_irq(&dev->power.lock); in rpm_resume()
909 * pm_runtime_work - Universal runtime PM work function.
920 spin_lock_irq(&dev->power.lock); in pm_runtime_work()
922 if (!dev->power.request_pending) in pm_runtime_work()
925 req = dev->power.request; in pm_runtime_work()
926 dev->power.request = RPM_REQ_NONE; in pm_runtime_work()
927 dev->power.request_pending = false; in pm_runtime_work()
947 spin_unlock_irq(&dev->power.lock); in pm_runtime_work()
951 * pm_suspend_timer_fn - Timer function for pm_schedule_suspend().
962 spin_lock_irqsave(&dev->power.lock, flags); in pm_suspend_timer_fn()
964 expires = dev->power.timer_expires; in pm_suspend_timer_fn()
970 dev->power.timer_expires = 0; in pm_suspend_timer_fn()
971 rpm_suspend(dev, dev->power.timer_autosuspends ? in pm_suspend_timer_fn()
975 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_suspend_timer_fn()
981 * pm_schedule_suspend - Set up a timer to submit a suspend request in future.
983 * @delay: Time to wait before submitting a suspend request, in milliseconds.
985 int pm_schedule_suspend(struct device *dev, unsigned int delay) in pm_schedule_suspend() argument
991 spin_lock_irqsave(&dev->power.lock, flags); in pm_schedule_suspend()
993 if (!delay) { in pm_schedule_suspend()
1005 expires = ktime_get_mono_fast_ns() + (u64)delay * NSEC_PER_MSEC; in pm_schedule_suspend()
1006 dev->power.timer_expires = expires; in pm_schedule_suspend()
1007 dev->power.timer_autosuspends = 0; in pm_schedule_suspend()
1008 hrtimer_start(&dev->power.suspend_timer, expires, HRTIMER_MODE_ABS); in pm_schedule_suspend()
1011 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_schedule_suspend()
1018 * __pm_runtime_idle - Entry point for runtime idle operations.
1035 if (!atomic_dec_and_test(&dev->power.usage_count)) { in __pm_runtime_idle()
1041 might_sleep_if(!(rpmflags & RPM_ASYNC) && !dev->power.irq_safe); in __pm_runtime_idle()
1043 spin_lock_irqsave(&dev->power.lock, flags); in __pm_runtime_idle()
1045 spin_unlock_irqrestore(&dev->power.lock, flags); in __pm_runtime_idle()
1052 * __pm_runtime_suspend - Entry point for runtime put/suspend operations.
1069 if (!atomic_dec_and_test(&dev->power.usage_count)) { in __pm_runtime_suspend()
1075 might_sleep_if(!(rpmflags & RPM_ASYNC) && !dev->power.irq_safe); in __pm_runtime_suspend()
1077 spin_lock_irqsave(&dev->power.lock, flags); in __pm_runtime_suspend()
1079 spin_unlock_irqrestore(&dev->power.lock, flags); in __pm_runtime_suspend()
1086 * __pm_runtime_resume - Entry point for runtime resume operations.
1101 might_sleep_if(!(rpmflags & RPM_ASYNC) && !dev->power.irq_safe && in __pm_runtime_resume()
1102 dev->power.runtime_status != RPM_ACTIVE); in __pm_runtime_resume()
1105 atomic_inc(&dev->power.usage_count); in __pm_runtime_resume()
1107 spin_lock_irqsave(&dev->power.lock, flags); in __pm_runtime_resume()
1109 spin_unlock_irqrestore(&dev->power.lock, flags); in __pm_runtime_resume()
1116 * pm_runtime_get_if_active - Conditionally bump up device usage counter.
1120 * Return -EINVAL if runtime PM is disabled for @dev.
1142 spin_lock_irqsave(&dev->power.lock, flags); in pm_runtime_get_if_active()
1143 if (dev->power.disable_depth > 0) { in pm_runtime_get_if_active()
1144 retval = -EINVAL; in pm_runtime_get_if_active()
1145 } else if (dev->power.runtime_status != RPM_ACTIVE) { in pm_runtime_get_if_active()
1149 atomic_inc(&dev->power.usage_count); in pm_runtime_get_if_active()
1151 retval = atomic_inc_not_zero(&dev->power.usage_count); in pm_runtime_get_if_active()
1154 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_runtime_get_if_active()
1161 * __pm_runtime_set_status - Set runtime PM status of a device.
1170 * set to RPM_ACTIVE, so -EBUSY is returned in that case.
1186 struct device *parent = dev->parent; in __pm_runtime_set_status()
1191 return -EINVAL; in __pm_runtime_set_status()
1193 spin_lock_irq(&dev->power.lock); in __pm_runtime_set_status()
1196 * Prevent PM-runtime from being enabled for the device or return an in __pm_runtime_set_status()
1199 if (dev->power.runtime_error || dev->power.disable_depth) in __pm_runtime_set_status()
1200 dev->power.disable_depth++; in __pm_runtime_set_status()
1202 error = -EAGAIN; in __pm_runtime_set_status()
1204 spin_unlock_irq(&dev->power.lock); in __pm_runtime_set_status()
1225 spin_lock_irq(&dev->power.lock); in __pm_runtime_set_status()
1227 if (dev->power.runtime_status == status || !parent) in __pm_runtime_set_status()
1231 atomic_add_unless(&parent->power.child_count, -1, 0); in __pm_runtime_set_status()
1232 notify_parent = !parent->power.ignore_children; in __pm_runtime_set_status()
1234 spin_lock_nested(&parent->power.lock, SINGLE_DEPTH_NESTING); in __pm_runtime_set_status()
1241 if (!parent->power.disable_depth in __pm_runtime_set_status()
1242 && !parent->power.ignore_children in __pm_runtime_set_status()
1243 && parent->power.runtime_status != RPM_ACTIVE) { in __pm_runtime_set_status()
1247 error = -EBUSY; in __pm_runtime_set_status()
1248 } else if (dev->power.runtime_status == RPM_SUSPENDED) { in __pm_runtime_set_status()
1249 atomic_inc(&parent->power.child_count); in __pm_runtime_set_status()
1252 spin_unlock(&parent->power.lock); in __pm_runtime_set_status()
1263 dev->power.runtime_error = 0; in __pm_runtime_set_status()
1266 spin_unlock_irq(&dev->power.lock); in __pm_runtime_set_status()
1286 * __pm_runtime_barrier - Cancel pending requests and wait for completions.
1292 * Should be called under dev->power.lock with interrupts disabled.
1298 if (dev->power.request_pending) { in __pm_runtime_barrier()
1299 dev->power.request = RPM_REQ_NONE; in __pm_runtime_barrier()
1300 spin_unlock_irq(&dev->power.lock); in __pm_runtime_barrier()
1302 cancel_work_sync(&dev->power.work); in __pm_runtime_barrier()
1304 spin_lock_irq(&dev->power.lock); in __pm_runtime_barrier()
1305 dev->power.request_pending = false; in __pm_runtime_barrier()
1308 if (dev->power.runtime_status == RPM_SUSPENDING in __pm_runtime_barrier()
1309 || dev->power.runtime_status == RPM_RESUMING in __pm_runtime_barrier()
1310 || dev->power.idle_notification) { in __pm_runtime_barrier()
1313 /* Suspend, wake-up or idle notification in progress. */ in __pm_runtime_barrier()
1315 prepare_to_wait(&dev->power.wait_queue, &wait, in __pm_runtime_barrier()
1317 if (dev->power.runtime_status != RPM_SUSPENDING in __pm_runtime_barrier()
1318 && dev->power.runtime_status != RPM_RESUMING in __pm_runtime_barrier()
1319 && !dev->power.idle_notification) in __pm_runtime_barrier()
1321 spin_unlock_irq(&dev->power.lock); in __pm_runtime_barrier()
1325 spin_lock_irq(&dev->power.lock); in __pm_runtime_barrier()
1327 finish_wait(&dev->power.wait_queue, &wait); in __pm_runtime_barrier()
1332 * pm_runtime_barrier - Flush pending requests and wait for completions.
1350 spin_lock_irq(&dev->power.lock); in pm_runtime_barrier()
1352 if (dev->power.request_pending in pm_runtime_barrier()
1353 && dev->power.request == RPM_REQ_RESUME) { in pm_runtime_barrier()
1360 spin_unlock_irq(&dev->power.lock); in pm_runtime_barrier()
1368 * __pm_runtime_disable - Disable runtime PM of a device.
1383 spin_lock_irq(&dev->power.lock); in __pm_runtime_disable()
1385 if (dev->power.disable_depth > 0) { in __pm_runtime_disable()
1386 dev->power.disable_depth++; in __pm_runtime_disable()
1395 if (check_resume && dev->power.request_pending in __pm_runtime_disable()
1396 && dev->power.request == RPM_REQ_RESUME) { in __pm_runtime_disable()
1408 /* Update time accounting before disabling PM-runtime. */ in __pm_runtime_disable()
1411 if (!dev->power.disable_depth++) in __pm_runtime_disable()
1415 spin_unlock_irq(&dev->power.lock); in __pm_runtime_disable()
1420 * pm_runtime_enable - Enable runtime PM of a device.
1427 spin_lock_irqsave(&dev->power.lock, flags); in pm_runtime_enable()
1429 if (dev->power.disable_depth > 0) { in pm_runtime_enable()
1430 dev->power.disable_depth--; in pm_runtime_enable()
1433 if (!dev->power.disable_depth) in pm_runtime_enable()
1434 dev->power.accounting_timestamp = ktime_get_mono_fast_ns(); in pm_runtime_enable()
1439 WARN(!dev->power.disable_depth && in pm_runtime_enable()
1440 dev->power.runtime_status == RPM_SUSPENDED && in pm_runtime_enable()
1441 !dev->power.ignore_children && in pm_runtime_enable()
1442 atomic_read(&dev->power.child_count) > 0, in pm_runtime_enable()
1446 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_runtime_enable()
1456 * devm_pm_runtime_enable - devres-enabled version of pm_runtime_enable.
1468 * pm_runtime_forbid - Block runtime PM of a device.
1477 spin_lock_irq(&dev->power.lock); in pm_runtime_forbid()
1478 if (!dev->power.runtime_auto) in pm_runtime_forbid()
1481 dev->power.runtime_auto = false; in pm_runtime_forbid()
1482 atomic_inc(&dev->power.usage_count); in pm_runtime_forbid()
1486 spin_unlock_irq(&dev->power.lock); in pm_runtime_forbid()
1491 * pm_runtime_allow - Unblock runtime PM of a device.
1498 spin_lock_irq(&dev->power.lock); in pm_runtime_allow()
1499 if (dev->power.runtime_auto) in pm_runtime_allow()
1502 dev->power.runtime_auto = true; in pm_runtime_allow()
1503 if (atomic_dec_and_test(&dev->power.usage_count)) in pm_runtime_allow()
1509 spin_unlock_irq(&dev->power.lock); in pm_runtime_allow()
1514 * pm_runtime_no_callbacks - Ignore runtime PM callbacks for a device.
1518 * device is power-managed through its parent and has no runtime PM
1523 spin_lock_irq(&dev->power.lock); in pm_runtime_no_callbacks()
1524 dev->power.no_callbacks = 1; in pm_runtime_no_callbacks()
1525 spin_unlock_irq(&dev->power.lock); in pm_runtime_no_callbacks()
1532 * pm_runtime_irq_safe - Leave interrupts disabled during callbacks.
1536 * ->runtime_suspend() and ->runtime_resume() callbacks for this device should
1539 * the parent from runtime suspending -- otherwise an irq-safe child might have
1540 * to wait for a non-irq-safe parent.
1544 if (dev->parent) in pm_runtime_irq_safe()
1545 pm_runtime_get_sync(dev->parent); in pm_runtime_irq_safe()
1546 spin_lock_irq(&dev->power.lock); in pm_runtime_irq_safe()
1547 dev->power.irq_safe = 1; in pm_runtime_irq_safe()
1548 spin_unlock_irq(&dev->power.lock); in pm_runtime_irq_safe()
1553 * update_autosuspend - Handle a change to a device's autosuspend settings.
1558 * Prevent runtime suspend if the new delay is negative and use_autosuspend is
1561 * This function must be called under dev->power.lock with interrupts disabled.
1565 int delay = dev->power.autosuspend_delay; in update_autosuspend() local
1568 if (dev->power.use_autosuspend && delay < 0) { in update_autosuspend()
1572 atomic_inc(&dev->power.usage_count); in update_autosuspend()
1584 atomic_dec(&dev->power.usage_count); in update_autosuspend()
1586 /* Maybe we can autosuspend now. */ in update_autosuspend()
1592 * pm_runtime_set_autosuspend_delay - Set a device's autosuspend_delay value.
1594 * @delay: Value of the new delay in milliseconds.
1600 void pm_runtime_set_autosuspend_delay(struct device *dev, int delay) in pm_runtime_set_autosuspend_delay() argument
1604 spin_lock_irq(&dev->power.lock); in pm_runtime_set_autosuspend_delay()
1605 old_delay = dev->power.autosuspend_delay; in pm_runtime_set_autosuspend_delay()
1606 old_use = dev->power.use_autosuspend; in pm_runtime_set_autosuspend_delay()
1607 dev->power.autosuspend_delay = delay; in pm_runtime_set_autosuspend_delay()
1609 spin_unlock_irq(&dev->power.lock); in pm_runtime_set_autosuspend_delay()
1614 * __pm_runtime_use_autosuspend - Set a device's use_autosuspend flag.
1625 spin_lock_irq(&dev->power.lock); in __pm_runtime_use_autosuspend()
1626 old_delay = dev->power.autosuspend_delay; in __pm_runtime_use_autosuspend()
1627 old_use = dev->power.use_autosuspend; in __pm_runtime_use_autosuspend()
1628 dev->power.use_autosuspend = use; in __pm_runtime_use_autosuspend()
1630 spin_unlock_irq(&dev->power.lock); in __pm_runtime_use_autosuspend()
1635 * pm_runtime_init - Initialize runtime PM fields in given device object.
1640 dev->power.runtime_status = RPM_SUSPENDED; in pm_runtime_init()
1641 dev->power.idle_notification = false; in pm_runtime_init()
1643 dev->power.disable_depth = 1; in pm_runtime_init()
1644 atomic_set(&dev->power.usage_count, 0); in pm_runtime_init()
1646 dev->power.runtime_error = 0; in pm_runtime_init()
1648 atomic_set(&dev->power.child_count, 0); in pm_runtime_init()
1650 dev->power.runtime_auto = true; in pm_runtime_init()
1652 dev->power.request_pending = false; in pm_runtime_init()
1653 dev->power.request = RPM_REQ_NONE; in pm_runtime_init()
1654 dev->power.deferred_resume = false; in pm_runtime_init()
1655 dev->power.needs_force_resume = 0; in pm_runtime_init()
1656 INIT_WORK(&dev->power.work, pm_runtime_work); in pm_runtime_init()
1658 dev->power.timer_expires = 0; in pm_runtime_init()
1659 hrtimer_init(&dev->power.suspend_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); in pm_runtime_init()
1660 dev->power.suspend_timer.function = pm_suspend_timer_fn; in pm_runtime_init()
1662 init_waitqueue_head(&dev->power.wait_queue); in pm_runtime_init()
1666 * pm_runtime_reinit - Re-initialize runtime PM fields in given device object.
1667 * @dev: Device object to re-initialize.
1672 if (dev->power.runtime_status == RPM_ACTIVE) in pm_runtime_reinit()
1674 if (dev->power.irq_safe) { in pm_runtime_reinit()
1675 spin_lock_irq(&dev->power.lock); in pm_runtime_reinit()
1676 dev->power.irq_safe = 0; in pm_runtime_reinit()
1677 spin_unlock_irq(&dev->power.lock); in pm_runtime_reinit()
1678 if (dev->parent) in pm_runtime_reinit()
1679 pm_runtime_put(dev->parent); in pm_runtime_reinit()
1685 * pm_runtime_remove - Prepare for removing a device from device hierarchy.
1695 * pm_runtime_get_suppliers - Resume and reference-count supplier devices.
1705 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in pm_runtime_get_suppliers()
1707 if (link->flags & DL_FLAG_PM_RUNTIME) { in pm_runtime_get_suppliers()
1708 link->supplier_preactivated = true; in pm_runtime_get_suppliers()
1709 pm_runtime_get_sync(link->supplier); in pm_runtime_get_suppliers()
1710 refcount_inc(&link->rpm_active); in pm_runtime_get_suppliers()
1717 * pm_runtime_put_suppliers - Drop references to supplier devices.
1729 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in pm_runtime_put_suppliers()
1731 if (link->supplier_preactivated) { in pm_runtime_put_suppliers()
1732 link->supplier_preactivated = false; in pm_runtime_put_suppliers()
1733 spin_lock_irqsave(&dev->power.lock, flags); in pm_runtime_put_suppliers()
1735 refcount_dec_not_one(&link->rpm_active); in pm_runtime_put_suppliers()
1736 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_runtime_put_suppliers()
1738 pm_runtime_put(link->supplier); in pm_runtime_put_suppliers()
1746 spin_lock_irq(&dev->power.lock); in pm_runtime_new_link()
1747 dev->power.links_count++; in pm_runtime_new_link()
1748 spin_unlock_irq(&dev->power.lock); in pm_runtime_new_link()
1753 spin_lock_irq(&dev->power.lock); in pm_runtime_drop_link_count()
1754 WARN_ON(dev->power.links_count == 0); in pm_runtime_drop_link_count()
1755 dev->power.links_count--; in pm_runtime_drop_link_count()
1756 spin_unlock_irq(&dev->power.lock); in pm_runtime_drop_link_count()
1760 * pm_runtime_drop_link - Prepare for device link removal.
1769 if (!(link->flags & DL_FLAG_PM_RUNTIME)) in pm_runtime_drop_link()
1772 pm_runtime_drop_link_count(link->consumer); in pm_runtime_drop_link()
1774 while (refcount_dec_not_one(&link->rpm_active)) in pm_runtime_drop_link()
1775 pm_runtime_put(link->supplier); in pm_runtime_drop_link()
1780 return atomic_read(&dev->power.usage_count) <= 1 && in pm_runtime_need_not_resume()
1781 (atomic_read(&dev->power.child_count) == 0 || in pm_runtime_need_not_resume()
1782 dev->power.ignore_children); in pm_runtime_need_not_resume()
1786 * pm_runtime_force_suspend - Force a device into suspend state if needed.
1790 * if it is active, invoke its ->runtime_suspend callback to suspend it and
1793 * the system-wide transition under way, decrement its parent's children counter
1799 * system-wide PM transitions to sleep states. It assumes that the analogous
1818 * If the device can stay in suspend after the system-wide transition in pm_runtime_force_suspend()
1827 dev->power.needs_force_resume = 1; in pm_runtime_force_suspend()
1839 * pm_runtime_force_resume - Force a device into resume state if needed.
1855 if (!pm_runtime_status_suspended(dev) || !dev->power.needs_force_resume) in pm_runtime_force_resume()
1874 dev->power.needs_force_resume = 0; in pm_runtime_force_resume()