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()
309 * pm_runtime_release_supplier - Drop references to device link's supplier.
319 struct device *supplier = link->supplier; in pm_runtime_release_supplier()
327 while (refcount_dec_not_one(&link->rpm_active) && in pm_runtime_release_supplier()
328 atomic_read(&supplier->power.usage_count) > 0) in pm_runtime_release_supplier()
339 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in __rpm_put_suppliers()
354 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in rpm_suspend_suppliers()
356 pm_request_idle(link->supplier); in rpm_suspend_suppliers()
362 * __rpm_callback - Run a given runtime PM callback for a given device.
367 __releases(&dev->power.lock) __acquires(&dev->power.lock) in __rpm_callback()
370 bool use_links = dev->power.links_count > 0; in __rpm_callback()
372 if (dev->power.irq_safe) { in __rpm_callback()
373 spin_unlock(&dev->power.lock); in __rpm_callback()
375 spin_unlock_irq(&dev->power.lock); in __rpm_callback()
384 if (use_links && dev->power.runtime_status == RPM_RESUMING) { in __rpm_callback()
399 if (dev->power.irq_safe) { in __rpm_callback()
400 spin_lock(&dev->power.lock); in __rpm_callback()
410 && ((dev->power.runtime_status == RPM_SUSPENDING && !retval) in __rpm_callback()
411 || (dev->power.runtime_status == RPM_RESUMING && retval))) { in __rpm_callback()
420 spin_lock_irq(&dev->power.lock); in __rpm_callback()
427 * rpm_idle - Notify device bus type if the device can be suspended.
433 * the RPM_ASYNC flag is set then queue an idle-notification request; otherwise
434 * run the ->runtime_idle() callback directly. If the ->runtime_idle callback
437 * This function must be called under dev->power.lock with interrupts disabled.
450 else if (dev->power.runtime_status != RPM_ACTIVE) in rpm_idle()
451 retval = -EAGAIN; in rpm_idle()
457 else if (dev->power.request_pending && in rpm_idle()
458 dev->power.request > RPM_REQ_IDLE) in rpm_idle()
459 retval = -EAGAIN; in rpm_idle()
462 else if (dev->power.idle_notification) in rpm_idle()
463 retval = -EINPROGRESS; in rpm_idle()
468 dev->power.request = RPM_REQ_NONE; in rpm_idle()
470 if (dev->power.no_callbacks) in rpm_idle()
475 dev->power.request = RPM_REQ_IDLE; in rpm_idle()
476 if (!dev->power.request_pending) { in rpm_idle()
477 dev->power.request_pending = true; in rpm_idle()
478 queue_work(pm_wq, &dev->power.work); in rpm_idle()
484 dev->power.idle_notification = true; in rpm_idle()
491 dev->power.idle_notification = false; in rpm_idle()
492 wake_up_all(&dev->power.wait_queue); in rpm_idle()
500 * rpm_callback - Run a given runtime PM callback for a given device.
509 return -ENOSYS; in rpm_callback()
511 if (dev->power.memalloc_noio) { in rpm_callback()
530 dev->power.runtime_error = retval; in rpm_callback()
531 return retval != -EACCES ? retval : -EIO; in rpm_callback()
535 * rpm_suspend - Carry out runtime suspend of given device.
540 * Cancel a pending idle notification, autosuspend or suspend. If
544 * otherwise run the ->runtime_suspend() callback directly. When
545 * ->runtime_suspend succeeded, if a deferred resume was requested while
548 * ignore_children of parent->power and irq_safe of dev->power are not set).
549 * If ->runtime_suspend failed with -EAGAIN or -EBUSY, and if the RPM_AUTO
550 * flag is set and the next autosuspend-delay expiration time is in the
551 * future, schedule another autosuspend attempt.
553 * This function must be called under dev->power.lock with interrupts disabled.
556 __releases(&dev->power.lock) __acquires(&dev->power.lock) in rpm_suspend()
570 if (dev->power.runtime_status == RPM_RESUMING && !(rpmflags & RPM_ASYNC)) in rpm_suspend()
571 retval = -EAGAIN; in rpm_suspend()
577 && dev->power.runtime_status != RPM_SUSPENDING) { in rpm_suspend()
582 dev->power.request = RPM_REQ_NONE; in rpm_suspend()
586 * set to expire at or before the autosuspend delay, in rpm_suspend()
591 if (!(dev->power.timer_expires && in rpm_suspend()
592 dev->power.timer_expires <= expires)) { in rpm_suspend()
597 u64 slack = (u64)READ_ONCE(dev->power.autosuspend_delay) * in rpm_suspend()
600 dev->power.timer_expires = expires; in rpm_suspend()
601 hrtimer_start_range_ns(&dev->power.suspend_timer, in rpm_suspend()
606 dev->power.timer_autosuspends = 1; in rpm_suspend()
614 if (dev->power.runtime_status == RPM_SUSPENDING) { in rpm_suspend()
618 retval = -EINPROGRESS; in rpm_suspend()
622 if (dev->power.irq_safe) { in rpm_suspend()
623 spin_unlock(&dev->power.lock); in rpm_suspend()
627 spin_lock(&dev->power.lock); in rpm_suspend()
633 prepare_to_wait(&dev->power.wait_queue, &wait, in rpm_suspend()
635 if (dev->power.runtime_status != RPM_SUSPENDING) in rpm_suspend()
638 spin_unlock_irq(&dev->power.lock); in rpm_suspend()
642 spin_lock_irq(&dev->power.lock); in rpm_suspend()
644 finish_wait(&dev->power.wait_queue, &wait); in rpm_suspend()
648 if (dev->power.no_callbacks) in rpm_suspend()
653 dev->power.request = (rpmflags & RPM_AUTO) ? in rpm_suspend()
655 if (!dev->power.request_pending) { in rpm_suspend()
656 dev->power.request_pending = true; in rpm_suspend()
657 queue_work(pm_wq, &dev->power.work); in rpm_suspend()
675 if (dev->parent) { in rpm_suspend()
676 parent = dev->parent; in rpm_suspend()
677 atomic_add_unless(&parent->power.child_count, -1, 0); in rpm_suspend()
679 wake_up_all(&dev->power.wait_queue); in rpm_suspend()
681 if (dev->power.deferred_resume) { in rpm_suspend()
682 dev->power.deferred_resume = false; in rpm_suspend()
684 retval = -EAGAIN; in rpm_suspend()
688 if (dev->power.irq_safe) in rpm_suspend()
692 if (parent && !parent->power.ignore_children) { in rpm_suspend()
693 spin_unlock(&dev->power.lock); in rpm_suspend()
695 spin_lock(&parent->power.lock); in rpm_suspend()
697 spin_unlock(&parent->power.lock); in rpm_suspend()
699 spin_lock(&dev->power.lock); in rpm_suspend()
702 if (dev->power.links_count > 0) { in rpm_suspend()
703 spin_unlock_irq(&dev->power.lock); in rpm_suspend()
707 spin_lock_irq(&dev->power.lock); in rpm_suspend()
718 dev->power.deferred_resume = false; in rpm_suspend()
719 wake_up_all(&dev->power.wait_queue); in rpm_suspend()
721 if (retval == -EAGAIN || retval == -EBUSY) { in rpm_suspend()
722 dev->power.runtime_error = 0; in rpm_suspend()
725 * If the callback routine failed an autosuspend, and in rpm_suspend()
727 * is a new autosuspend expiration time, automatically in rpm_suspend()
728 * reschedule another autosuspend. in rpm_suspend()
740 * rpm_resume - Carry out runtime resume of given device.
751 * ->runtime_resume() callback directly. Queue an idle notification for the
754 * This function must be called under dev->power.lock with interrupts disabled.
757 __releases(&dev->power.lock) __acquires(&dev->power.lock) in rpm_resume()
766 if (dev->power.runtime_error) in rpm_resume()
767 retval = -EINVAL; in rpm_resume()
768 else if (dev->power.disable_depth == 1 && dev->power.is_suspended in rpm_resume()
769 && dev->power.runtime_status == RPM_ACTIVE) in rpm_resume()
771 else if (dev->power.disable_depth > 0) in rpm_resume()
772 retval = -EACCES; in rpm_resume()
778 * optimization: If an autosuspend timer is running, leave it running in rpm_resume()
782 dev->power.request = RPM_REQ_NONE; in rpm_resume()
783 if (!dev->power.timer_autosuspends) in rpm_resume()
786 if (dev->power.runtime_status == RPM_ACTIVE) { in rpm_resume()
791 if (dev->power.runtime_status == RPM_RESUMING in rpm_resume()
792 || dev->power.runtime_status == RPM_SUSPENDING) { in rpm_resume()
796 if (dev->power.runtime_status == RPM_SUSPENDING) in rpm_resume()
797 dev->power.deferred_resume = true; in rpm_resume()
799 retval = -EINPROGRESS; in rpm_resume()
803 if (dev->power.irq_safe) { in rpm_resume()
804 spin_unlock(&dev->power.lock); in rpm_resume()
808 spin_lock(&dev->power.lock); in rpm_resume()
814 prepare_to_wait(&dev->power.wait_queue, &wait, in rpm_resume()
816 if (dev->power.runtime_status != RPM_RESUMING in rpm_resume()
817 && dev->power.runtime_status != RPM_SUSPENDING) in rpm_resume()
820 spin_unlock_irq(&dev->power.lock); in rpm_resume()
824 spin_lock_irq(&dev->power.lock); in rpm_resume()
826 finish_wait(&dev->power.wait_queue, &wait); in rpm_resume()
835 if (dev->power.no_callbacks && !parent && dev->parent) { in rpm_resume()
836 spin_lock_nested(&dev->parent->power.lock, SINGLE_DEPTH_NESTING); in rpm_resume()
837 if (dev->parent->power.disable_depth > 0 in rpm_resume()
838 || dev->parent->power.ignore_children in rpm_resume()
839 || dev->parent->power.runtime_status == RPM_ACTIVE) { in rpm_resume()
840 atomic_inc(&dev->parent->power.child_count); in rpm_resume()
841 spin_unlock(&dev->parent->power.lock); in rpm_resume()
845 spin_unlock(&dev->parent->power.lock); in rpm_resume()
850 dev->power.request = RPM_REQ_RESUME; in rpm_resume()
851 if (!dev->power.request_pending) { in rpm_resume()
852 dev->power.request_pending = true; in rpm_resume()
853 queue_work(pm_wq, &dev->power.work); in rpm_resume()
859 if (!parent && dev->parent) { in rpm_resume()
862 * necessary. Not needed if dev is irq-safe; then the in rpm_resume()
865 parent = dev->parent; in rpm_resume()
866 if (dev->power.irq_safe) in rpm_resume()
868 spin_unlock(&dev->power.lock); in rpm_resume()
872 spin_lock(&parent->power.lock); in rpm_resume()
877 if (!parent->power.disable_depth in rpm_resume()
878 && !parent->power.ignore_children) { in rpm_resume()
880 if (parent->power.runtime_status != RPM_ACTIVE) in rpm_resume()
881 retval = -EBUSY; in rpm_resume()
883 spin_unlock(&parent->power.lock); in rpm_resume()
885 spin_lock(&dev->power.lock); in rpm_resume()
892 if (dev->power.no_callbacks) in rpm_resume()
910 atomic_inc(&parent->power.child_count); in rpm_resume()
912 wake_up_all(&dev->power.wait_queue); in rpm_resume()
918 if (parent && !dev->power.irq_safe) { in rpm_resume()
919 spin_unlock_irq(&dev->power.lock); in rpm_resume()
923 spin_lock_irq(&dev->power.lock); in rpm_resume()
932 * pm_runtime_work - Universal runtime PM work function.
943 spin_lock_irq(&dev->power.lock); in pm_runtime_work()
945 if (!dev->power.request_pending) in pm_runtime_work()
948 req = dev->power.request; in pm_runtime_work()
949 dev->power.request = RPM_REQ_NONE; in pm_runtime_work()
950 dev->power.request_pending = false; in pm_runtime_work()
970 spin_unlock_irq(&dev->power.lock); in pm_runtime_work()
974 * pm_suspend_timer_fn - Timer function for pm_schedule_suspend().
985 spin_lock_irqsave(&dev->power.lock, flags); in pm_suspend_timer_fn()
987 expires = dev->power.timer_expires; in pm_suspend_timer_fn()
993 dev->power.timer_expires = 0; in pm_suspend_timer_fn()
994 rpm_suspend(dev, dev->power.timer_autosuspends ? in pm_suspend_timer_fn()
998 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_suspend_timer_fn()
1004 * pm_schedule_suspend - Set up a timer to submit a suspend request in future.
1006 * @delay: Time to wait before submitting a suspend request, in milliseconds.
1008 int pm_schedule_suspend(struct device *dev, unsigned int delay) in pm_schedule_suspend() argument
1014 spin_lock_irqsave(&dev->power.lock, flags); in pm_schedule_suspend()
1016 if (!delay) { in pm_schedule_suspend()
1028 expires = ktime_get_mono_fast_ns() + (u64)delay * NSEC_PER_MSEC; in pm_schedule_suspend()
1029 dev->power.timer_expires = expires; in pm_schedule_suspend()
1030 dev->power.timer_autosuspends = 0; in pm_schedule_suspend()
1031 hrtimer_start(&dev->power.suspend_timer, expires, HRTIMER_MODE_ABS); in pm_schedule_suspend()
1034 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_schedule_suspend()
1041 * __pm_runtime_idle - Entry point for runtime idle operations.
1058 if (!atomic_dec_and_test(&dev->power.usage_count)) { in __pm_runtime_idle()
1064 might_sleep_if(!(rpmflags & RPM_ASYNC) && !dev->power.irq_safe); in __pm_runtime_idle()
1066 spin_lock_irqsave(&dev->power.lock, flags); in __pm_runtime_idle()
1068 spin_unlock_irqrestore(&dev->power.lock, flags); in __pm_runtime_idle()
1075 * __pm_runtime_suspend - Entry point for runtime put/suspend operations.
1092 if (!atomic_dec_and_test(&dev->power.usage_count)) { in __pm_runtime_suspend()
1098 might_sleep_if(!(rpmflags & RPM_ASYNC) && !dev->power.irq_safe); in __pm_runtime_suspend()
1100 spin_lock_irqsave(&dev->power.lock, flags); in __pm_runtime_suspend()
1102 spin_unlock_irqrestore(&dev->power.lock, flags); in __pm_runtime_suspend()
1109 * __pm_runtime_resume - Entry point for runtime resume operations.
1124 might_sleep_if(!(rpmflags & RPM_ASYNC) && !dev->power.irq_safe && in __pm_runtime_resume()
1125 dev->power.runtime_status != RPM_ACTIVE); in __pm_runtime_resume()
1128 atomic_inc(&dev->power.usage_count); in __pm_runtime_resume()
1130 spin_lock_irqsave(&dev->power.lock, flags); in __pm_runtime_resume()
1132 spin_unlock_irqrestore(&dev->power.lock, flags); in __pm_runtime_resume()
1139 * pm_runtime_get_if_active - Conditionally bump up device usage counter.
1143 * Return -EINVAL if runtime PM is disabled for @dev.
1165 spin_lock_irqsave(&dev->power.lock, flags); in pm_runtime_get_if_active()
1166 if (dev->power.disable_depth > 0) { in pm_runtime_get_if_active()
1167 retval = -EINVAL; in pm_runtime_get_if_active()
1168 } else if (dev->power.runtime_status != RPM_ACTIVE) { in pm_runtime_get_if_active()
1172 atomic_inc(&dev->power.usage_count); in pm_runtime_get_if_active()
1174 retval = atomic_inc_not_zero(&dev->power.usage_count); in pm_runtime_get_if_active()
1177 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_runtime_get_if_active()
1184 * __pm_runtime_set_status - Set runtime PM status of a device.
1193 * set to RPM_ACTIVE, so -EBUSY is returned in that case.
1209 struct device *parent = dev->parent; in __pm_runtime_set_status()
1214 return -EINVAL; in __pm_runtime_set_status()
1216 spin_lock_irq(&dev->power.lock); in __pm_runtime_set_status()
1219 * Prevent PM-runtime from being enabled for the device or return an in __pm_runtime_set_status()
1222 if (dev->power.runtime_error || dev->power.disable_depth) in __pm_runtime_set_status()
1223 dev->power.disable_depth++; in __pm_runtime_set_status()
1225 error = -EAGAIN; in __pm_runtime_set_status()
1227 spin_unlock_irq(&dev->power.lock); in __pm_runtime_set_status()
1248 spin_lock_irq(&dev->power.lock); in __pm_runtime_set_status()
1250 if (dev->power.runtime_status == status || !parent) in __pm_runtime_set_status()
1254 atomic_add_unless(&parent->power.child_count, -1, 0); in __pm_runtime_set_status()
1255 notify_parent = !parent->power.ignore_children; in __pm_runtime_set_status()
1257 spin_lock_nested(&parent->power.lock, SINGLE_DEPTH_NESTING); in __pm_runtime_set_status()
1264 if (!parent->power.disable_depth in __pm_runtime_set_status()
1265 && !parent->power.ignore_children in __pm_runtime_set_status()
1266 && parent->power.runtime_status != RPM_ACTIVE) { in __pm_runtime_set_status()
1270 error = -EBUSY; in __pm_runtime_set_status()
1271 } else if (dev->power.runtime_status == RPM_SUSPENDED) { in __pm_runtime_set_status()
1272 atomic_inc(&parent->power.child_count); in __pm_runtime_set_status()
1275 spin_unlock(&parent->power.lock); in __pm_runtime_set_status()
1286 dev->power.runtime_error = 0; in __pm_runtime_set_status()
1289 spin_unlock_irq(&dev->power.lock); in __pm_runtime_set_status()
1309 * __pm_runtime_barrier - Cancel pending requests and wait for completions.
1315 * Should be called under dev->power.lock with interrupts disabled.
1321 if (dev->power.request_pending) { in __pm_runtime_barrier()
1322 dev->power.request = RPM_REQ_NONE; in __pm_runtime_barrier()
1323 spin_unlock_irq(&dev->power.lock); in __pm_runtime_barrier()
1325 cancel_work_sync(&dev->power.work); in __pm_runtime_barrier()
1327 spin_lock_irq(&dev->power.lock); in __pm_runtime_barrier()
1328 dev->power.request_pending = false; in __pm_runtime_barrier()
1331 if (dev->power.runtime_status == RPM_SUSPENDING in __pm_runtime_barrier()
1332 || dev->power.runtime_status == RPM_RESUMING in __pm_runtime_barrier()
1333 || dev->power.idle_notification) { in __pm_runtime_barrier()
1336 /* Suspend, wake-up or idle notification in progress. */ in __pm_runtime_barrier()
1338 prepare_to_wait(&dev->power.wait_queue, &wait, in __pm_runtime_barrier()
1340 if (dev->power.runtime_status != RPM_SUSPENDING in __pm_runtime_barrier()
1341 && dev->power.runtime_status != RPM_RESUMING in __pm_runtime_barrier()
1342 && !dev->power.idle_notification) in __pm_runtime_barrier()
1344 spin_unlock_irq(&dev->power.lock); in __pm_runtime_barrier()
1348 spin_lock_irq(&dev->power.lock); in __pm_runtime_barrier()
1350 finish_wait(&dev->power.wait_queue, &wait); in __pm_runtime_barrier()
1355 * pm_runtime_barrier - Flush pending requests and wait for completions.
1373 spin_lock_irq(&dev->power.lock); in pm_runtime_barrier()
1375 if (dev->power.request_pending in pm_runtime_barrier()
1376 && dev->power.request == RPM_REQ_RESUME) { in pm_runtime_barrier()
1383 spin_unlock_irq(&dev->power.lock); in pm_runtime_barrier()
1391 * __pm_runtime_disable - Disable runtime PM of a device.
1406 spin_lock_irq(&dev->power.lock); in __pm_runtime_disable()
1408 if (dev->power.disable_depth > 0) { in __pm_runtime_disable()
1409 dev->power.disable_depth++; in __pm_runtime_disable()
1418 if (check_resume && dev->power.request_pending in __pm_runtime_disable()
1419 && dev->power.request == RPM_REQ_RESUME) { in __pm_runtime_disable()
1431 /* Update time accounting before disabling PM-runtime. */ in __pm_runtime_disable()
1434 if (!dev->power.disable_depth++) in __pm_runtime_disable()
1438 spin_unlock_irq(&dev->power.lock); in __pm_runtime_disable()
1443 * pm_runtime_enable - Enable runtime PM of a device.
1450 spin_lock_irqsave(&dev->power.lock, flags); in pm_runtime_enable()
1452 if (dev->power.disable_depth > 0) { in pm_runtime_enable()
1453 dev->power.disable_depth--; in pm_runtime_enable()
1456 if (!dev->power.disable_depth) in pm_runtime_enable()
1457 dev->power.accounting_timestamp = ktime_get_mono_fast_ns(); in pm_runtime_enable()
1462 WARN(!dev->power.disable_depth && in pm_runtime_enable()
1463 dev->power.runtime_status == RPM_SUSPENDED && in pm_runtime_enable()
1464 !dev->power.ignore_children && in pm_runtime_enable()
1465 atomic_read(&dev->power.child_count) > 0, in pm_runtime_enable()
1469 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_runtime_enable()
1474 * pm_runtime_forbid - Block runtime PM of a device.
1483 spin_lock_irq(&dev->power.lock); in pm_runtime_forbid()
1484 if (!dev->power.runtime_auto) in pm_runtime_forbid()
1487 dev->power.runtime_auto = false; in pm_runtime_forbid()
1488 atomic_inc(&dev->power.usage_count); in pm_runtime_forbid()
1492 spin_unlock_irq(&dev->power.lock); in pm_runtime_forbid()
1497 * pm_runtime_allow - Unblock runtime PM of a device.
1504 spin_lock_irq(&dev->power.lock); in pm_runtime_allow()
1505 if (dev->power.runtime_auto) in pm_runtime_allow()
1508 dev->power.runtime_auto = true; in pm_runtime_allow()
1509 if (atomic_dec_and_test(&dev->power.usage_count)) in pm_runtime_allow()
1515 spin_unlock_irq(&dev->power.lock); in pm_runtime_allow()
1520 * pm_runtime_no_callbacks - Ignore runtime PM callbacks for a device.
1524 * device is power-managed through its parent and has no runtime PM
1529 spin_lock_irq(&dev->power.lock); in pm_runtime_no_callbacks()
1530 dev->power.no_callbacks = 1; in pm_runtime_no_callbacks()
1531 spin_unlock_irq(&dev->power.lock); in pm_runtime_no_callbacks()
1538 * pm_runtime_irq_safe - Leave interrupts disabled during callbacks.
1542 * ->runtime_suspend() and ->runtime_resume() callbacks for this device should
1545 * the parent from runtime suspending -- otherwise an irq-safe child might have
1546 * to wait for a non-irq-safe parent.
1550 if (dev->parent) in pm_runtime_irq_safe()
1551 pm_runtime_get_sync(dev->parent); in pm_runtime_irq_safe()
1552 spin_lock_irq(&dev->power.lock); in pm_runtime_irq_safe()
1553 dev->power.irq_safe = 1; in pm_runtime_irq_safe()
1554 spin_unlock_irq(&dev->power.lock); in pm_runtime_irq_safe()
1559 * update_autosuspend - Handle a change to a device's autosuspend settings.
1564 * Prevent runtime suspend if the new delay is negative and use_autosuspend is
1567 * This function must be called under dev->power.lock with interrupts disabled.
1571 int delay = dev->power.autosuspend_delay; in update_autosuspend() local
1574 if (dev->power.use_autosuspend && delay < 0) { in update_autosuspend()
1578 atomic_inc(&dev->power.usage_count); in update_autosuspend()
1590 atomic_dec(&dev->power.usage_count); in update_autosuspend()
1592 /* Maybe we can autosuspend now. */ in update_autosuspend()
1598 * pm_runtime_set_autosuspend_delay - Set a device's autosuspend_delay value.
1600 * @delay: Value of the new delay in milliseconds.
1606 void pm_runtime_set_autosuspend_delay(struct device *dev, int delay) in pm_runtime_set_autosuspend_delay() argument
1610 spin_lock_irq(&dev->power.lock); in pm_runtime_set_autosuspend_delay()
1611 old_delay = dev->power.autosuspend_delay; in pm_runtime_set_autosuspend_delay()
1612 old_use = dev->power.use_autosuspend; in pm_runtime_set_autosuspend_delay()
1613 dev->power.autosuspend_delay = delay; in pm_runtime_set_autosuspend_delay()
1615 spin_unlock_irq(&dev->power.lock); in pm_runtime_set_autosuspend_delay()
1620 * __pm_runtime_use_autosuspend - Set a device's use_autosuspend flag.
1631 spin_lock_irq(&dev->power.lock); in __pm_runtime_use_autosuspend()
1632 old_delay = dev->power.autosuspend_delay; in __pm_runtime_use_autosuspend()
1633 old_use = dev->power.use_autosuspend; in __pm_runtime_use_autosuspend()
1634 dev->power.use_autosuspend = use; in __pm_runtime_use_autosuspend()
1636 spin_unlock_irq(&dev->power.lock); in __pm_runtime_use_autosuspend()
1641 * pm_runtime_init - Initialize runtime PM fields in given device object.
1646 dev->power.runtime_status = RPM_SUSPENDED; in pm_runtime_init()
1647 dev->power.idle_notification = false; in pm_runtime_init()
1649 dev->power.disable_depth = 1; in pm_runtime_init()
1650 atomic_set(&dev->power.usage_count, 0); in pm_runtime_init()
1652 dev->power.runtime_error = 0; in pm_runtime_init()
1654 atomic_set(&dev->power.child_count, 0); in pm_runtime_init()
1656 dev->power.runtime_auto = true; in pm_runtime_init()
1658 dev->power.request_pending = false; in pm_runtime_init()
1659 dev->power.request = RPM_REQ_NONE; in pm_runtime_init()
1660 dev->power.deferred_resume = false; in pm_runtime_init()
1661 dev->power.needs_force_resume = 0; in pm_runtime_init()
1662 INIT_WORK(&dev->power.work, pm_runtime_work); in pm_runtime_init()
1664 dev->power.timer_expires = 0; in pm_runtime_init()
1665 hrtimer_init(&dev->power.suspend_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); in pm_runtime_init()
1666 dev->power.suspend_timer.function = pm_suspend_timer_fn; in pm_runtime_init()
1668 init_waitqueue_head(&dev->power.wait_queue); in pm_runtime_init()
1672 * pm_runtime_reinit - Re-initialize runtime PM fields in given device object.
1673 * @dev: Device object to re-initialize.
1678 if (dev->power.runtime_status == RPM_ACTIVE) in pm_runtime_reinit()
1680 if (dev->power.irq_safe) { in pm_runtime_reinit()
1681 spin_lock_irq(&dev->power.lock); in pm_runtime_reinit()
1682 dev->power.irq_safe = 0; in pm_runtime_reinit()
1683 spin_unlock_irq(&dev->power.lock); in pm_runtime_reinit()
1684 if (dev->parent) in pm_runtime_reinit()
1685 pm_runtime_put(dev->parent); in pm_runtime_reinit()
1691 * pm_runtime_remove - Prepare for removing a device from device hierarchy.
1701 * pm_runtime_get_suppliers - Resume and reference-count supplier devices.
1711 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in pm_runtime_get_suppliers()
1713 if (link->flags & DL_FLAG_PM_RUNTIME) { in pm_runtime_get_suppliers()
1714 link->supplier_preactivated = true; in pm_runtime_get_suppliers()
1715 pm_runtime_get_sync(link->supplier); in pm_runtime_get_suppliers()
1716 refcount_inc(&link->rpm_active); in pm_runtime_get_suppliers()
1723 * pm_runtime_put_suppliers - Drop references to supplier devices.
1735 list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, in pm_runtime_put_suppliers()
1737 if (link->supplier_preactivated) { in pm_runtime_put_suppliers()
1738 link->supplier_preactivated = false; in pm_runtime_put_suppliers()
1739 spin_lock_irqsave(&dev->power.lock, flags); in pm_runtime_put_suppliers()
1741 refcount_dec_not_one(&link->rpm_active); in pm_runtime_put_suppliers()
1742 spin_unlock_irqrestore(&dev->power.lock, flags); in pm_runtime_put_suppliers()
1744 pm_runtime_put(link->supplier); in pm_runtime_put_suppliers()
1752 spin_lock_irq(&dev->power.lock); in pm_runtime_new_link()
1753 dev->power.links_count++; in pm_runtime_new_link()
1754 spin_unlock_irq(&dev->power.lock); in pm_runtime_new_link()
1759 spin_lock_irq(&dev->power.lock); in pm_runtime_drop_link_count()
1760 WARN_ON(dev->power.links_count == 0); in pm_runtime_drop_link_count()
1761 dev->power.links_count--; in pm_runtime_drop_link_count()
1762 spin_unlock_irq(&dev->power.lock); in pm_runtime_drop_link_count()
1766 * pm_runtime_drop_link - Prepare for device link removal.
1775 if (!(link->flags & DL_FLAG_PM_RUNTIME)) in pm_runtime_drop_link()
1778 pm_runtime_drop_link_count(link->consumer); in pm_runtime_drop_link()
1784 return atomic_read(&dev->power.usage_count) <= 1 && in pm_runtime_need_not_resume()
1785 (atomic_read(&dev->power.child_count) == 0 || in pm_runtime_need_not_resume()
1786 dev->power.ignore_children); in pm_runtime_need_not_resume()
1790 * pm_runtime_force_suspend - Force a device into suspend state if needed.
1794 * if it is active, invoke its ->runtime_suspend callback to suspend it and
1797 * the system-wide transition under way, decrement its parent's children counter
1803 * system-wide PM transitions to sleep states. It assumes that the analogous
1822 * If the device can stay in suspend after the system-wide transition in pm_runtime_force_suspend()
1831 dev->power.needs_force_resume = 1; in pm_runtime_force_suspend()
1843 * pm_runtime_force_resume - Force a device into resume state if needed.
1859 if (!pm_runtime_status_suspended(dev) || !dev->power.needs_force_resume) in pm_runtime_force_resume()
1878 dev->power.needs_force_resume = 0; in pm_runtime_force_resume()