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()
254 * rpm_check_suspend_allowed - Test whether a device may be suspended.
261 if (dev->power.runtime_error) in rpm_check_suspend_allowed()
262 retval = -EINVAL; in rpm_check_suspend_allowed()
263 else if (dev->power.disable_depth > 0) in rpm_check_suspend_allowed()
264 retval = -EACCES; in rpm_check_suspend_allowed()
265 else if (atomic_read(&dev->power.usage_count)) in rpm_check_suspend_allowed()
266 retval = -EAGAIN; in rpm_check_suspend_allowed()
267 else if (!dev->power.ignore_children && atomic_read(&dev->power.child_count)) in rpm_check_suspend_allowed()
268 retval = -EBUSY; in rpm_check_suspend_allowed()
271 else if ((dev->power.deferred_resume && in rpm_check_suspend_allowed()
272 dev->power.runtime_status == RPM_SUSPENDING) || in rpm_check_suspend_allowed()
273 (dev->power.request_pending && dev->power.request == RPM_REQ_RESUME)) in rpm_check_suspend_allowed()
274 retval = -EAGAIN; in rpm_check_suspend_allowed()
276 retval = -EPERM; in rpm_check_suspend_allowed()
277 else if (dev->power.runtime_status == RPM_SUSPENDED) in rpm_check_suspend_allowed()
287 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in rpm_get_suppliers()
291 if (!(link->flags & DL_FLAG_PM_RUNTIME)) in rpm_get_suppliers()
294 retval = pm_runtime_get_sync(link->supplier); in rpm_get_suppliers()
296 if (retval < 0 && retval != -EACCES) { in rpm_get_suppliers()
297 pm_runtime_put_noidle(link->supplier); in rpm_get_suppliers()
300 refcount_inc(&link->rpm_active); in rpm_get_suppliers()
306 * pm_runtime_release_supplier - Drop references to device link's supplier.
313 struct device *supplier = link->supplier; in pm_runtime_release_supplier()
321 while (refcount_dec_not_one(&link->rpm_active) && in pm_runtime_release_supplier()
322 atomic_read(&supplier->power.usage_count) > 0) in pm_runtime_release_supplier()
330 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in __rpm_put_suppliers()
334 pm_request_idle(link->supplier); in __rpm_put_suppliers()
348 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in rpm_suspend_suppliers()
350 pm_request_idle(link->supplier); in rpm_suspend_suppliers()
356 * __rpm_callback - Run a given runtime PM callback for a given device.
361 __releases(&dev->power.lock) __acquires(&dev->power.lock) in __rpm_callback()
364 bool use_links = dev->power.links_count > 0; in __rpm_callback()
366 if (dev->power.irq_safe) { in __rpm_callback()
367 spin_unlock(&dev->power.lock); in __rpm_callback()
369 spin_unlock_irq(&dev->power.lock); in __rpm_callback()
378 if (use_links && dev->power.runtime_status == RPM_RESUMING) { in __rpm_callback()
394 if (dev->power.irq_safe) { in __rpm_callback()
395 spin_lock(&dev->power.lock); in __rpm_callback()
405 ((dev->power.runtime_status == RPM_SUSPENDING && !retval) || in __rpm_callback()
406 (dev->power.runtime_status == RPM_RESUMING && retval))) { in __rpm_callback()
415 spin_lock_irq(&dev->power.lock); in __rpm_callback()
422 * rpm_callback - Run a given runtime PM callback for a given device.
430 if (dev->power.memalloc_noio) { in rpm_callback()
449 dev->power.runtime_error = retval; in rpm_callback()
450 return retval != -EACCES ? retval : -EIO; in rpm_callback()
454 * rpm_idle - Notify device bus type if the device can be suspended.
460 * the RPM_ASYNC flag is set then queue an idle-notification request; otherwise
461 * run the ->runtime_idle() callback directly. If the ->runtime_idle callback
464 * This function must be called under dev->power.lock with interrupts disabled.
477 else if (dev->power.runtime_status != RPM_ACTIVE) in rpm_idle()
478 retval = -EAGAIN; in rpm_idle()
484 else if (dev->power.request_pending && in rpm_idle()
485 dev->power.request > RPM_REQ_IDLE) in rpm_idle()
486 retval = -EAGAIN; in rpm_idle()
489 else if (dev->power.idle_notification) in rpm_idle()
490 retval = -EINPROGRESS; in rpm_idle()
496 dev->power.request = RPM_REQ_NONE; in rpm_idle()
501 if (!callback || dev->power.no_callbacks) in rpm_idle()
506 dev->power.request = RPM_REQ_IDLE; in rpm_idle()
507 if (!dev->power.request_pending) { in rpm_idle()
508 dev->power.request_pending = true; in rpm_idle()
509 queue_work(pm_wq, &dev->power.work); in rpm_idle()
515 dev->power.idle_notification = true; in rpm_idle()
517 if (dev->power.irq_safe) in rpm_idle()
518 spin_unlock(&dev->power.lock); in rpm_idle()
520 spin_unlock_irq(&dev->power.lock); in rpm_idle()
524 if (dev->power.irq_safe) in rpm_idle()
525 spin_lock(&dev->power.lock); in rpm_idle()
527 spin_lock_irq(&dev->power.lock); in rpm_idle()
529 dev->power.idle_notification = false; in rpm_idle()
530 wake_up_all(&dev->power.wait_queue); in rpm_idle()
538 * rpm_suspend - Carry out runtime suspend of given device.
543 * Cancel a pending idle notification, autosuspend or suspend. If
547 * otherwise run the ->runtime_suspend() callback directly. When
548 * ->runtime_suspend succeeded, if a deferred resume was requested while
551 * ignore_children of parent->power and irq_safe of dev->power are not set).
552 * If ->runtime_suspend failed with -EAGAIN or -EBUSY, and if the RPM_AUTO
553 * flag is set and the next autosuspend-delay expiration time is in the
554 * future, schedule another autosuspend attempt.
556 * This function must be called under dev->power.lock with interrupts disabled.
559 __releases(&dev->power.lock) __acquires(&dev->power.lock) in rpm_suspend()
573 if (dev->power.runtime_status == RPM_RESUMING && !(rpmflags & RPM_ASYNC)) in rpm_suspend()
574 retval = -EAGAIN; in rpm_suspend()
580 if ((rpmflags & RPM_AUTO) && dev->power.runtime_status != RPM_SUSPENDING) { in rpm_suspend()
585 dev->power.request = RPM_REQ_NONE; in rpm_suspend()
589 * set to expire at or before the autosuspend delay, in rpm_suspend()
594 if (!(dev->power.timer_expires && in rpm_suspend()
595 dev->power.timer_expires <= expires)) { in rpm_suspend()
600 u64 slack = (u64)READ_ONCE(dev->power.autosuspend_delay) * in rpm_suspend()
603 dev->power.timer_expires = expires; in rpm_suspend()
604 hrtimer_start_range_ns(&dev->power.suspend_timer, in rpm_suspend()
609 dev->power.timer_autosuspends = 1; in rpm_suspend()
617 if (dev->power.runtime_status == RPM_SUSPENDING) { in rpm_suspend()
621 retval = -EINPROGRESS; in rpm_suspend()
625 if (dev->power.irq_safe) { in rpm_suspend()
626 spin_unlock(&dev->power.lock); in rpm_suspend()
630 spin_lock(&dev->power.lock); in rpm_suspend()
636 prepare_to_wait(&dev->power.wait_queue, &wait, in rpm_suspend()
638 if (dev->power.runtime_status != RPM_SUSPENDING) in rpm_suspend()
641 spin_unlock_irq(&dev->power.lock); in rpm_suspend()
645 spin_lock_irq(&dev->power.lock); in rpm_suspend()
647 finish_wait(&dev->power.wait_queue, &wait); in rpm_suspend()
651 if (dev->power.no_callbacks) in rpm_suspend()
656 dev->power.request = (rpmflags & RPM_AUTO) ? in rpm_suspend()
658 if (!dev->power.request_pending) { in rpm_suspend()
659 dev->power.request_pending = true; in rpm_suspend()
660 queue_work(pm_wq, &dev->power.work); in rpm_suspend()
680 if (dev->parent) { in rpm_suspend()
681 parent = dev->parent; in rpm_suspend()
682 atomic_add_unless(&parent->power.child_count, -1, 0); in rpm_suspend()
684 wake_up_all(&dev->power.wait_queue); in rpm_suspend()
686 if (dev->power.deferred_resume) { in rpm_suspend()
687 dev->power.deferred_resume = false; in rpm_suspend()
689 retval = -EAGAIN; in rpm_suspend()
693 if (dev->power.irq_safe) in rpm_suspend()
697 if (parent && !parent->power.ignore_children) { in rpm_suspend()
698 spin_unlock(&dev->power.lock); in rpm_suspend()
700 spin_lock(&parent->power.lock); in rpm_suspend()
702 spin_unlock(&parent->power.lock); in rpm_suspend()
704 spin_lock(&dev->power.lock); in rpm_suspend()
707 if (dev->power.links_count > 0) { in rpm_suspend()
708 spin_unlock_irq(&dev->power.lock); in rpm_suspend()
712 spin_lock_irq(&dev->power.lock); in rpm_suspend()
723 dev->power.deferred_resume = false; in rpm_suspend()
724 wake_up_all(&dev->power.wait_queue); in rpm_suspend()
726 if (retval == -EAGAIN || retval == -EBUSY) { in rpm_suspend()
727 dev->power.runtime_error = 0; in rpm_suspend()
730 * If the callback routine failed an autosuspend, and in rpm_suspend()
732 * is a new autosuspend expiration time, automatically in rpm_suspend()
733 * reschedule another autosuspend. in rpm_suspend()
745 * rpm_resume - Carry out runtime resume of given device.
756 * ->runtime_resume() callback directly. Queue an idle notification for the
759 * This function must be called under dev->power.lock with interrupts disabled.
762 __releases(&dev->power.lock) __acquires(&dev->power.lock) in rpm_resume()
771 if (dev->power.runtime_error) { in rpm_resume()
772 retval = -EINVAL; in rpm_resume()
773 } else if (dev->power.disable_depth > 0) { in rpm_resume()
774 if (dev->power.runtime_status == RPM_ACTIVE && in rpm_resume()
775 dev->power.last_status == RPM_ACTIVE) in rpm_resume()
778 retval = -EACCES; in rpm_resume()
785 * optimization: If an autosuspend timer is running, leave it running in rpm_resume()
789 dev->power.request = RPM_REQ_NONE; in rpm_resume()
790 if (!dev->power.timer_autosuspends) in rpm_resume()
793 if (dev->power.runtime_status == RPM_ACTIVE) { in rpm_resume()
798 if (dev->power.runtime_status == RPM_RESUMING || in rpm_resume()
799 dev->power.runtime_status == RPM_SUSPENDING) { in rpm_resume()
803 if (dev->power.runtime_status == RPM_SUSPENDING) { in rpm_resume()
804 dev->power.deferred_resume = true; in rpm_resume()
806 retval = -EINPROGRESS; in rpm_resume()
808 retval = -EINPROGRESS; in rpm_resume()
813 if (dev->power.irq_safe) { in rpm_resume()
814 spin_unlock(&dev->power.lock); in rpm_resume()
818 spin_lock(&dev->power.lock); in rpm_resume()
824 prepare_to_wait(&dev->power.wait_queue, &wait, in rpm_resume()
826 if (dev->power.runtime_status != RPM_RESUMING && in rpm_resume()
827 dev->power.runtime_status != RPM_SUSPENDING) in rpm_resume()
830 spin_unlock_irq(&dev->power.lock); in rpm_resume()
834 spin_lock_irq(&dev->power.lock); in rpm_resume()
836 finish_wait(&dev->power.wait_queue, &wait); in rpm_resume()
845 if (dev->power.no_callbacks && !parent && dev->parent) { in rpm_resume()
846 spin_lock_nested(&dev->parent->power.lock, SINGLE_DEPTH_NESTING); in rpm_resume()
847 if (dev->parent->power.disable_depth > 0 || in rpm_resume()
848 dev->parent->power.ignore_children || in rpm_resume()
849 dev->parent->power.runtime_status == RPM_ACTIVE) { in rpm_resume()
850 atomic_inc(&dev->parent->power.child_count); in rpm_resume()
851 spin_unlock(&dev->parent->power.lock); in rpm_resume()
855 spin_unlock(&dev->parent->power.lock); in rpm_resume()
860 dev->power.request = RPM_REQ_RESUME; in rpm_resume()
861 if (!dev->power.request_pending) { in rpm_resume()
862 dev->power.request_pending = true; in rpm_resume()
863 queue_work(pm_wq, &dev->power.work); in rpm_resume()
869 if (!parent && dev->parent) { in rpm_resume()
872 * necessary. Not needed if dev is irq-safe; then the in rpm_resume()
875 parent = dev->parent; in rpm_resume()
876 if (dev->power.irq_safe) in rpm_resume()
879 spin_unlock(&dev->power.lock); in rpm_resume()
883 spin_lock(&parent->power.lock); in rpm_resume()
888 if (!parent->power.disable_depth && in rpm_resume()
889 !parent->power.ignore_children) { in rpm_resume()
891 if (parent->power.runtime_status != RPM_ACTIVE) in rpm_resume()
892 retval = -EBUSY; in rpm_resume()
894 spin_unlock(&parent->power.lock); in rpm_resume()
896 spin_lock(&dev->power.lock); in rpm_resume()
904 if (dev->power.no_callbacks) in rpm_resume()
922 atomic_inc(&parent->power.child_count); in rpm_resume()
924 wake_up_all(&dev->power.wait_queue); in rpm_resume()
930 if (parent && !dev->power.irq_safe) { in rpm_resume()
931 spin_unlock_irq(&dev->power.lock); in rpm_resume()
935 spin_lock_irq(&dev->power.lock); in rpm_resume()
944 * pm_runtime_work - Universal runtime PM work function.
955 spin_lock_irq(&dev->power.lock); in pm_runtime_work()
957 if (!dev->power.request_pending) in pm_runtime_work()
960 req = dev->power.request; in pm_runtime_work()
961 dev->power.request = RPM_REQ_NONE; in pm_runtime_work()
962 dev->power.request_pending = false; in pm_runtime_work()
982 spin_unlock_irq(&dev->power.lock); in pm_runtime_work()
986 * pm_suspend_timer_fn - Timer function for pm_schedule_suspend().
997 spin_lock_irqsave(&dev->power.lock, flags); in pm_suspend_timer_fn()
999 expires = dev->power.timer_expires; in pm_suspend_timer_fn()
1005 dev->power.timer_expires = 0; in pm_suspend_timer_fn()
1006 rpm_suspend(dev, dev->power.timer_autosuspends ? in pm_suspend_timer_fn()
1010 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_suspend_timer_fn()
1016 * pm_schedule_suspend - Set up a timer to submit a suspend request in future.
1018 * @delay: Time to wait before submitting a suspend request, in milliseconds.
1020 int pm_schedule_suspend(struct device *dev, unsigned int delay) in pm_schedule_suspend() argument
1026 spin_lock_irqsave(&dev->power.lock, flags); in pm_schedule_suspend()
1028 if (!delay) { in pm_schedule_suspend()
1040 expires = ktime_get_mono_fast_ns() + (u64)delay * NSEC_PER_MSEC; in pm_schedule_suspend()
1041 dev->power.timer_expires = expires; in pm_schedule_suspend()
1042 dev->power.timer_autosuspends = 0; in pm_schedule_suspend()
1043 hrtimer_start(&dev->power.suspend_timer, expires, HRTIMER_MODE_ABS); in pm_schedule_suspend()
1046 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_schedule_suspend()
1056 ret = atomic_sub_return(1, &dev->power.usage_count); in rpm_drop_usage_count()
1066 atomic_inc(&dev->power.usage_count); in rpm_drop_usage_count()
1068 return -EINVAL; in rpm_drop_usage_count()
1072 * __pm_runtime_idle - Entry point for runtime idle operations.
1099 might_sleep_if(!(rpmflags & RPM_ASYNC) && !dev->power.irq_safe); in __pm_runtime_idle()
1101 spin_lock_irqsave(&dev->power.lock, flags); in __pm_runtime_idle()
1103 spin_unlock_irqrestore(&dev->power.lock, flags); in __pm_runtime_idle()
1110 * __pm_runtime_suspend - Entry point for runtime put/suspend operations.
1137 might_sleep_if(!(rpmflags & RPM_ASYNC) && !dev->power.irq_safe); in __pm_runtime_suspend()
1139 spin_lock_irqsave(&dev->power.lock, flags); in __pm_runtime_suspend()
1141 spin_unlock_irqrestore(&dev->power.lock, flags); in __pm_runtime_suspend()
1148 * __pm_runtime_resume - Entry point for runtime resume operations.
1163 might_sleep_if(!(rpmflags & RPM_ASYNC) && !dev->power.irq_safe && in __pm_runtime_resume()
1164 dev->power.runtime_status != RPM_ACTIVE); in __pm_runtime_resume()
1167 atomic_inc(&dev->power.usage_count); in __pm_runtime_resume()
1169 spin_lock_irqsave(&dev->power.lock, flags); in __pm_runtime_resume()
1171 spin_unlock_irqrestore(&dev->power.lock, flags); in __pm_runtime_resume()
1178 * pm_runtime_get_if_active - Conditionally bump up device usage counter.
1182 * Return -EINVAL if runtime PM is disabled for @dev.
1204 spin_lock_irqsave(&dev->power.lock, flags); in pm_runtime_get_if_active()
1205 if (dev->power.disable_depth > 0) { in pm_runtime_get_if_active()
1206 retval = -EINVAL; in pm_runtime_get_if_active()
1207 } else if (dev->power.runtime_status != RPM_ACTIVE) { in pm_runtime_get_if_active()
1211 atomic_inc(&dev->power.usage_count); in pm_runtime_get_if_active()
1213 retval = atomic_inc_not_zero(&dev->power.usage_count); in pm_runtime_get_if_active()
1216 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_runtime_get_if_active()
1223 * __pm_runtime_set_status - Set runtime PM status of a device.
1232 * set to RPM_ACTIVE, so -EBUSY is returned in that case.
1248 struct device *parent = dev->parent; in __pm_runtime_set_status()
1254 return -EINVAL; in __pm_runtime_set_status()
1256 spin_lock_irqsave(&dev->power.lock, flags); in __pm_runtime_set_status()
1259 * Prevent PM-runtime from being enabled for the device or return an in __pm_runtime_set_status()
1262 if (dev->power.runtime_error || dev->power.disable_depth) in __pm_runtime_set_status()
1263 dev->power.disable_depth++; in __pm_runtime_set_status()
1265 error = -EAGAIN; in __pm_runtime_set_status()
1267 spin_unlock_irqrestore(&dev->power.lock, flags); in __pm_runtime_set_status()
1288 spin_lock_irqsave(&dev->power.lock, flags); in __pm_runtime_set_status()
1290 if (dev->power.runtime_status == status || !parent) in __pm_runtime_set_status()
1294 atomic_add_unless(&parent->power.child_count, -1, 0); in __pm_runtime_set_status()
1295 notify_parent = !parent->power.ignore_children; in __pm_runtime_set_status()
1297 spin_lock_nested(&parent->power.lock, SINGLE_DEPTH_NESTING); in __pm_runtime_set_status()
1304 if (!parent->power.disable_depth && in __pm_runtime_set_status()
1305 !parent->power.ignore_children && in __pm_runtime_set_status()
1306 parent->power.runtime_status != RPM_ACTIVE) { in __pm_runtime_set_status()
1310 error = -EBUSY; in __pm_runtime_set_status()
1311 } else if (dev->power.runtime_status == RPM_SUSPENDED) { in __pm_runtime_set_status()
1312 atomic_inc(&parent->power.child_count); in __pm_runtime_set_status()
1315 spin_unlock(&parent->power.lock); in __pm_runtime_set_status()
1326 dev->power.runtime_error = 0; in __pm_runtime_set_status()
1329 spin_unlock_irqrestore(&dev->power.lock, flags); in __pm_runtime_set_status()
1349 * __pm_runtime_barrier - Cancel pending requests and wait for completions.
1355 * Should be called under dev->power.lock with interrupts disabled.
1361 if (dev->power.request_pending) { in __pm_runtime_barrier()
1362 dev->power.request = RPM_REQ_NONE; in __pm_runtime_barrier()
1363 spin_unlock_irq(&dev->power.lock); in __pm_runtime_barrier()
1365 cancel_work_sync(&dev->power.work); in __pm_runtime_barrier()
1367 spin_lock_irq(&dev->power.lock); in __pm_runtime_barrier()
1368 dev->power.request_pending = false; in __pm_runtime_barrier()
1371 if (dev->power.runtime_status == RPM_SUSPENDING || in __pm_runtime_barrier()
1372 dev->power.runtime_status == RPM_RESUMING || in __pm_runtime_barrier()
1373 dev->power.idle_notification) { in __pm_runtime_barrier()
1376 /* Suspend, wake-up or idle notification in progress. */ in __pm_runtime_barrier()
1378 prepare_to_wait(&dev->power.wait_queue, &wait, in __pm_runtime_barrier()
1380 if (dev->power.runtime_status != RPM_SUSPENDING in __pm_runtime_barrier()
1381 && dev->power.runtime_status != RPM_RESUMING in __pm_runtime_barrier()
1382 && !dev->power.idle_notification) in __pm_runtime_barrier()
1384 spin_unlock_irq(&dev->power.lock); in __pm_runtime_barrier()
1388 spin_lock_irq(&dev->power.lock); in __pm_runtime_barrier()
1390 finish_wait(&dev->power.wait_queue, &wait); in __pm_runtime_barrier()
1395 * pm_runtime_barrier - Flush pending requests and wait for completions.
1413 spin_lock_irq(&dev->power.lock); in pm_runtime_barrier()
1415 if (dev->power.request_pending in pm_runtime_barrier()
1416 && dev->power.request == RPM_REQ_RESUME) { in pm_runtime_barrier()
1423 spin_unlock_irq(&dev->power.lock); in pm_runtime_barrier()
1431 * __pm_runtime_disable - Disable runtime PM of a device.
1446 spin_lock_irq(&dev->power.lock); in __pm_runtime_disable()
1448 if (dev->power.disable_depth > 0) { in __pm_runtime_disable()
1449 dev->power.disable_depth++; in __pm_runtime_disable()
1458 if (check_resume && dev->power.request_pending && in __pm_runtime_disable()
1459 dev->power.request == RPM_REQ_RESUME) { in __pm_runtime_disable()
1471 /* Update time accounting before disabling PM-runtime. */ in __pm_runtime_disable()
1474 if (!dev->power.disable_depth++) { in __pm_runtime_disable()
1476 dev->power.last_status = dev->power.runtime_status; in __pm_runtime_disable()
1480 spin_unlock_irq(&dev->power.lock); in __pm_runtime_disable()
1485 * pm_runtime_enable - Enable runtime PM of a device.
1492 spin_lock_irqsave(&dev->power.lock, flags); in pm_runtime_enable()
1494 if (!dev->power.disable_depth) { in pm_runtime_enable()
1499 if (--dev->power.disable_depth > 0) in pm_runtime_enable()
1502 dev->power.last_status = RPM_INVALID; in pm_runtime_enable()
1503 dev->power.accounting_timestamp = ktime_get_mono_fast_ns(); in pm_runtime_enable()
1505 if (dev->power.runtime_status == RPM_SUSPENDED && in pm_runtime_enable()
1506 !dev->power.ignore_children && in pm_runtime_enable()
1507 atomic_read(&dev->power.child_count) > 0) in pm_runtime_enable()
1511 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_runtime_enable()
1522 * devm_pm_runtime_enable - devres-enabled version of pm_runtime_enable.
1538 * pm_runtime_forbid - Block runtime PM of a device.
1547 spin_lock_irq(&dev->power.lock); in pm_runtime_forbid()
1548 if (!dev->power.runtime_auto) in pm_runtime_forbid()
1551 dev->power.runtime_auto = false; in pm_runtime_forbid()
1552 atomic_inc(&dev->power.usage_count); in pm_runtime_forbid()
1556 spin_unlock_irq(&dev->power.lock); in pm_runtime_forbid()
1561 * pm_runtime_allow - Unblock runtime PM of a device.
1570 spin_lock_irq(&dev->power.lock); in pm_runtime_allow()
1571 if (dev->power.runtime_auto) in pm_runtime_allow()
1574 dev->power.runtime_auto = true; in pm_runtime_allow()
1582 spin_unlock_irq(&dev->power.lock); in pm_runtime_allow()
1587 * pm_runtime_no_callbacks - Ignore runtime PM callbacks for a device.
1591 * device is power-managed through its parent and has no runtime PM
1596 spin_lock_irq(&dev->power.lock); in pm_runtime_no_callbacks()
1597 dev->power.no_callbacks = 1; in pm_runtime_no_callbacks()
1598 spin_unlock_irq(&dev->power.lock); in pm_runtime_no_callbacks()
1605 * pm_runtime_irq_safe - Leave interrupts disabled during callbacks.
1609 * ->runtime_suspend() and ->runtime_resume() callbacks for this device should
1612 * the parent from runtime suspending -- otherwise an irq-safe child might have
1613 * to wait for a non-irq-safe parent.
1617 if (dev->parent) in pm_runtime_irq_safe()
1618 pm_runtime_get_sync(dev->parent); in pm_runtime_irq_safe()
1620 spin_lock_irq(&dev->power.lock); in pm_runtime_irq_safe()
1621 dev->power.irq_safe = 1; in pm_runtime_irq_safe()
1622 spin_unlock_irq(&dev->power.lock); in pm_runtime_irq_safe()
1627 * update_autosuspend - Handle a change to a device's autosuspend settings.
1632 * Prevent runtime suspend if the new delay is negative and use_autosuspend is
1635 * This function must be called under dev->power.lock with interrupts disabled.
1639 int delay = dev->power.autosuspend_delay; in update_autosuspend() local
1642 if (dev->power.use_autosuspend && delay < 0) { in update_autosuspend()
1646 atomic_inc(&dev->power.usage_count); in update_autosuspend()
1658 atomic_dec(&dev->power.usage_count); in update_autosuspend()
1660 /* Maybe we can autosuspend now. */ in update_autosuspend()
1666 * pm_runtime_set_autosuspend_delay - Set a device's autosuspend_delay value.
1668 * @delay: Value of the new delay in milliseconds.
1674 void pm_runtime_set_autosuspend_delay(struct device *dev, int delay) in pm_runtime_set_autosuspend_delay() argument
1678 spin_lock_irq(&dev->power.lock); in pm_runtime_set_autosuspend_delay()
1679 old_delay = dev->power.autosuspend_delay; in pm_runtime_set_autosuspend_delay()
1680 old_use = dev->power.use_autosuspend; in pm_runtime_set_autosuspend_delay()
1681 dev->power.autosuspend_delay = delay; in pm_runtime_set_autosuspend_delay()
1683 spin_unlock_irq(&dev->power.lock); in pm_runtime_set_autosuspend_delay()
1688 * __pm_runtime_use_autosuspend - Set a device's use_autosuspend flag.
1699 spin_lock_irq(&dev->power.lock); in __pm_runtime_use_autosuspend()
1700 old_delay = dev->power.autosuspend_delay; in __pm_runtime_use_autosuspend()
1701 old_use = dev->power.use_autosuspend; in __pm_runtime_use_autosuspend()
1702 dev->power.use_autosuspend = use; in __pm_runtime_use_autosuspend()
1704 spin_unlock_irq(&dev->power.lock); in __pm_runtime_use_autosuspend()
1709 * pm_runtime_init - Initialize runtime PM fields in given device object.
1714 dev->power.runtime_status = RPM_SUSPENDED; in pm_runtime_init()
1715 dev->power.last_status = RPM_INVALID; in pm_runtime_init()
1716 dev->power.idle_notification = false; in pm_runtime_init()
1718 dev->power.disable_depth = 1; in pm_runtime_init()
1719 atomic_set(&dev->power.usage_count, 0); in pm_runtime_init()
1721 dev->power.runtime_error = 0; in pm_runtime_init()
1723 atomic_set(&dev->power.child_count, 0); in pm_runtime_init()
1725 dev->power.runtime_auto = true; in pm_runtime_init()
1727 dev->power.request_pending = false; in pm_runtime_init()
1728 dev->power.request = RPM_REQ_NONE; in pm_runtime_init()
1729 dev->power.deferred_resume = false; in pm_runtime_init()
1730 dev->power.needs_force_resume = 0; in pm_runtime_init()
1731 INIT_WORK(&dev->power.work, pm_runtime_work); in pm_runtime_init()
1733 dev->power.timer_expires = 0; in pm_runtime_init()
1734 hrtimer_init(&dev->power.suspend_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); in pm_runtime_init()
1735 dev->power.suspend_timer.function = pm_suspend_timer_fn; in pm_runtime_init()
1737 init_waitqueue_head(&dev->power.wait_queue); in pm_runtime_init()
1741 * pm_runtime_reinit - Re-initialize runtime PM fields in given device object.
1742 * @dev: Device object to re-initialize.
1747 if (dev->power.runtime_status == RPM_ACTIVE) in pm_runtime_reinit()
1749 if (dev->power.irq_safe) { in pm_runtime_reinit()
1750 spin_lock_irq(&dev->power.lock); in pm_runtime_reinit()
1751 dev->power.irq_safe = 0; in pm_runtime_reinit()
1752 spin_unlock_irq(&dev->power.lock); in pm_runtime_reinit()
1753 if (dev->parent) in pm_runtime_reinit()
1754 pm_runtime_put(dev->parent); in pm_runtime_reinit()
1760 * pm_runtime_remove - Prepare for removing a device from device hierarchy.
1770 * pm_runtime_get_suppliers - Resume and reference-count supplier devices.
1780 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in pm_runtime_get_suppliers()
1782 if (link->flags & DL_FLAG_PM_RUNTIME) { in pm_runtime_get_suppliers()
1783 link->supplier_preactivated = true; in pm_runtime_get_suppliers()
1784 pm_runtime_get_sync(link->supplier); in pm_runtime_get_suppliers()
1791 * pm_runtime_put_suppliers - Drop references to supplier devices.
1801 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in pm_runtime_put_suppliers()
1803 if (link->supplier_preactivated) { in pm_runtime_put_suppliers()
1804 link->supplier_preactivated = false; in pm_runtime_put_suppliers()
1805 pm_runtime_put(link->supplier); in pm_runtime_put_suppliers()
1813 spin_lock_irq(&dev->power.lock); in pm_runtime_new_link()
1814 dev->power.links_count++; in pm_runtime_new_link()
1815 spin_unlock_irq(&dev->power.lock); in pm_runtime_new_link()
1820 spin_lock_irq(&dev->power.lock); in pm_runtime_drop_link_count()
1821 WARN_ON(dev->power.links_count == 0); in pm_runtime_drop_link_count()
1822 dev->power.links_count--; in pm_runtime_drop_link_count()
1823 spin_unlock_irq(&dev->power.lock); in pm_runtime_drop_link_count()
1827 * pm_runtime_drop_link - Prepare for device link removal.
1836 if (!(link->flags & DL_FLAG_PM_RUNTIME)) in pm_runtime_drop_link()
1839 pm_runtime_drop_link_count(link->consumer); in pm_runtime_drop_link()
1841 pm_request_idle(link->supplier); in pm_runtime_drop_link()
1846 return atomic_read(&dev->power.usage_count) <= 1 && in pm_runtime_need_not_resume()
1847 (atomic_read(&dev->power.child_count) == 0 || in pm_runtime_need_not_resume()
1848 dev->power.ignore_children); in pm_runtime_need_not_resume()
1852 * pm_runtime_force_suspend - Force a device into suspend state if needed.
1856 * if it is active, invoke its ->runtime_suspend callback to suspend it and
1859 * the system-wide transition under way, decrement its parent's children counter
1865 * system-wide PM transitions to sleep states. It assumes that the analogous
1869 * state where this function has called the ->runtime_suspend callback but the
1891 * If the device can stay in suspend after the system-wide transition in pm_runtime_force_suspend()
1900 dev->power.needs_force_resume = 1; in pm_runtime_force_suspend()
1913 * pm_runtime_force_resume - Force a device into resume state if needed.
1929 if (!pm_runtime_status_suspended(dev) || !dev->power.needs_force_resume) in pm_runtime_force_resume()
1950 dev->power.needs_force_resume = 0; in pm_runtime_force_resume()