diff options
Diffstat (limited to 'include/linux/pm_runtime.h')
| -rw-r--r-- | include/linux/pm_runtime.h | 240 |
1 files changed, 209 insertions, 31 deletions
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h index d39dc863f612..d88d6b6ccf5b 100644 --- a/include/linux/pm_runtime.h +++ b/include/linux/pm_runtime.h @@ -67,7 +67,6 @@ static inline bool queue_pm_work(struct work_struct *work) extern int pm_generic_runtime_suspend(struct device *dev); extern int pm_generic_runtime_resume(struct device *dev); extern int pm_runtime_force_suspend(struct device *dev); -extern int pm_runtime_force_resume(struct device *dev); extern int __pm_runtime_idle(struct device *dev, int rpmflags); extern int __pm_runtime_suspend(struct device *dev, int rpmflags); @@ -77,6 +76,8 @@ extern int pm_runtime_get_if_in_use(struct device *dev); extern int pm_schedule_suspend(struct device *dev, unsigned int delay); extern int __pm_runtime_set_status(struct device *dev, unsigned int status); extern int pm_runtime_barrier(struct device *dev); +extern bool pm_runtime_block_if_disabled(struct device *dev); +extern void pm_runtime_unblock(struct device *dev); extern void pm_runtime_enable(struct device *dev); extern void __pm_runtime_disable(struct device *dev, bool check_resume); extern void pm_runtime_allow(struct device *dev); @@ -93,7 +94,9 @@ extern void pm_runtime_new_link(struct device *dev); extern void pm_runtime_drop_link(struct device_link *link); extern void pm_runtime_release_supplier(struct device_link *link); +int devm_pm_runtime_set_active_enabled(struct device *dev); extern int devm_pm_runtime_enable(struct device *dev); +int devm_pm_runtime_get_noresume(struct device *dev); /** * pm_suspend_ignore_children - Set runtime PM behavior regarding children. @@ -197,6 +200,17 @@ static inline bool pm_runtime_enabled(struct device *dev) } /** + * pm_runtime_blocked - Check if runtime PM enabling is blocked. + * @dev: Target device. + * + * Do not call this function outside system suspend/resume code paths. + */ +static inline bool pm_runtime_blocked(struct device *dev) +{ + return dev->power.last_status == RPM_BLOCKED; +} + +/** * pm_runtime_has_no_callbacks - Check if runtime PM callbacks may be present. * @dev: Target device. * @@ -242,7 +256,6 @@ static inline bool queue_pm_work(struct work_struct *work) { return false; } static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } static inline int pm_runtime_force_suspend(struct device *dev) { return 0; } -static inline int pm_runtime_force_resume(struct device *dev) { return 0; } static inline int __pm_runtime_idle(struct device *dev, int rpmflags) { @@ -271,12 +284,17 @@ static inline int pm_runtime_get_if_active(struct device *dev) static inline int __pm_runtime_set_status(struct device *dev, unsigned int status) { return 0; } static inline int pm_runtime_barrier(struct device *dev) { return 0; } +static inline bool pm_runtime_block_if_disabled(struct device *dev) { return true; } +static inline void pm_runtime_unblock(struct device *dev) {} static inline void pm_runtime_enable(struct device *dev) {} static inline void __pm_runtime_disable(struct device *dev, bool c) {} +static inline bool pm_runtime_blocked(struct device *dev) { return true; } static inline void pm_runtime_allow(struct device *dev) {} static inline void pm_runtime_forbid(struct device *dev) {} +static inline int devm_pm_runtime_set_active_enabled(struct device *dev) { return 0; } static inline int devm_pm_runtime_enable(struct device *dev) { return 0; } +static inline int devm_pm_runtime_get_noresume(struct device *dev) { return 0; } static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {} static inline void pm_runtime_get_noresume(struct device *dev) {} @@ -308,6 +326,18 @@ static inline void pm_runtime_release_supplier(struct device_link *link) {} #endif /* !CONFIG_PM */ +#ifdef CONFIG_PM_SLEEP + +bool pm_runtime_need_not_resume(struct device *dev); +int pm_runtime_force_resume(struct device *dev); + +#else /* !CONFIG_PM_SLEEP */ + +static inline bool pm_runtime_need_not_resume(struct device *dev) {return true; } +static inline int pm_runtime_force_resume(struct device *dev) { return -ENXIO; } + +#endif /* CONFIG_PM_SLEEP */ + /** * pm_runtime_idle - Conditionally set up autosuspend of a device or suspend it. * @dev: Target device. @@ -315,6 +345,20 @@ static inline void pm_runtime_release_supplier(struct device_link *link) {} * Invoke the "idle check" callback of @dev and, depending on its return value, * set up autosuspend of @dev or suspend it (depending on whether or not * autosuspend has been enabled for it). + * + * Return: + * * 0: Success. + * * -EINVAL: Runtime PM error. + * * -EACCES: Runtime PM disabled. + * * -EAGAIN: Runtime PM usage_count non-zero, Runtime PM status change ongoing + * or device not in %RPM_ACTIVE state. + * * -EBUSY: Runtime PM child_count non-zero. + * * -EPERM: Device PM QoS resume latency 0. + * * -EINPROGRESS: Suspend already in progress. + * * -ENOSYS: CONFIG_PM not enabled. + * * 1: Device already suspended. + * Other values and conditions for the above values are possible as returned by + * Runtime PM idle and suspend callbacks. */ static inline int pm_runtime_idle(struct device *dev) { @@ -324,6 +368,18 @@ static inline int pm_runtime_idle(struct device *dev) /** * pm_runtime_suspend - Suspend a device synchronously. * @dev: Target device. + * + * Return: + * * 0: Success. + * * -EINVAL: Runtime PM error. + * * -EACCES: Runtime PM disabled. + * * -EAGAIN: Runtime PM usage_count non-zero or Runtime PM status change ongoing. + * * -EBUSY: Runtime PM child_count non-zero. + * * -EPERM: Device PM QoS resume latency 0. + * * -ENOSYS: CONFIG_PM not enabled. + * * 1: Device already suspended. + * Other values and conditions for the above values are possible as returned by + * Runtime PM suspend callbacks. */ static inline int pm_runtime_suspend(struct device *dev) { @@ -331,14 +387,29 @@ static inline int pm_runtime_suspend(struct device *dev) } /** - * pm_runtime_autosuspend - Set up autosuspend of a device or suspend it. + * pm_runtime_autosuspend - Update the last access time and set up autosuspend + * of a device. * @dev: Target device. * - * Set up autosuspend of @dev or suspend it (depending on whether or not - * autosuspend is enabled for it) without engaging its "idle check" callback. + * First update the last access time, then set up autosuspend of @dev or suspend + * it (depending on whether or not autosuspend is enabled for it) without + * engaging its "idle check" callback. + * + * Return: + * * 0: Success. + * * -EINVAL: Runtime PM error. + * * -EACCES: Runtime PM disabled. + * * -EAGAIN: Runtime PM usage_count non-zero or Runtime PM status change ongoing. + * * -EBUSY: Runtime PM child_count non-zero. + * * -EPERM: Device PM QoS resume latency 0. + * * -ENOSYS: CONFIG_PM not enabled. + * * 1: Device already suspended. + * Other values and conditions for the above values are possible as returned by + * Runtime PM suspend callbacks. */ static inline int pm_runtime_autosuspend(struct device *dev) { + pm_runtime_mark_last_busy(dev); return __pm_runtime_suspend(dev, RPM_AUTO); } @@ -357,6 +428,18 @@ static inline int pm_runtime_resume(struct device *dev) * * Queue up a work item to run an equivalent of pm_runtime_idle() for @dev * asynchronously. + * + * Return: + * * 0: Success. + * * -EINVAL: Runtime PM error. + * * -EACCES: Runtime PM disabled. + * * -EAGAIN: Runtime PM usage_count non-zero, Runtime PM status change ongoing + * or device not in %RPM_ACTIVE state. + * * -EBUSY: Runtime PM child_count non-zero. + * * -EPERM: Device PM QoS resume latency 0. + * * -EINPROGRESS: Suspend already in progress. + * * -ENOSYS: CONFIG_PM not enabled. + * * 1: Device already suspended. */ static inline int pm_request_idle(struct device *dev) { @@ -373,14 +456,27 @@ static inline int pm_request_resume(struct device *dev) } /** - * pm_request_autosuspend - Queue up autosuspend of a device. + * pm_request_autosuspend - Update the last access time and queue up autosuspend + * of a device. * @dev: Target device. * - * Queue up a work item to run an equivalent pm_runtime_autosuspend() for @dev - * asynchronously. + * Update the last access time of a device and queue up a work item to run an + * equivalent pm_runtime_autosuspend() for @dev asynchronously. + * + * Return: + * * 0: Success. + * * -EINVAL: Runtime PM error. + * * -EACCES: Runtime PM disabled. + * * -EAGAIN: Runtime PM usage_count non-zero or Runtime PM status change ongoing. + * * -EBUSY: Runtime PM child_count non-zero. + * * -EPERM: Device PM QoS resume latency 0. + * * -EINPROGRESS: Suspend already in progress. + * * -ENOSYS: CONFIG_PM not enabled. + * * 1: Device already suspended. */ static inline int pm_request_autosuspend(struct device *dev) { + pm_runtime_mark_last_busy(dev); return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO); } @@ -442,18 +538,42 @@ static inline int pm_runtime_resume_and_get(struct device *dev) * * Decrement the runtime PM usage counter of @dev and if it turns out to be * equal to 0, queue up a work item for @dev like in pm_request_idle(). + * + * Return: + * * 0: Success. + * * -EINVAL: Runtime PM error. + * * -EACCES: Runtime PM disabled. + * * -EAGAIN: Runtime PM usage_count non-zero or Runtime PM status change ongoing. + * * -EBUSY: Runtime PM child_count non-zero. + * * -EPERM: Device PM QoS resume latency 0. + * * -EINPROGRESS: Suspend already in progress. + * * -ENOSYS: CONFIG_PM not enabled. + * * 1: Device already suspended. */ static inline int pm_runtime_put(struct device *dev) { return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC); } +DEFINE_FREE(pm_runtime_put, struct device *, if (_T) pm_runtime_put(_T)) + /** * __pm_runtime_put_autosuspend - Drop device usage counter and queue autosuspend if 0. * @dev: Target device. * * Decrement the runtime PM usage counter of @dev and if it turns out to be * equal to 0, queue up a work item for @dev like in pm_request_autosuspend(). + * + * Return: + * * 0: Success. + * * -EINVAL: Runtime PM error. + * * -EACCES: Runtime PM disabled. + * * -EAGAIN: Runtime PM usage_count non-zero or Runtime PM status change ongoing. + * * -EBUSY: Runtime PM child_count non-zero. + * * -EPERM: Device PM QoS resume latency 0. + * * -EINPROGRESS: Suspend already in progress. + * * -ENOSYS: CONFIG_PM not enabled. + * * 1: Device already suspended. */ static inline int __pm_runtime_put_autosuspend(struct device *dev) { @@ -461,16 +581,29 @@ static inline int __pm_runtime_put_autosuspend(struct device *dev) } /** - * pm_runtime_put_autosuspend - Drop device usage counter and queue autosuspend if 0. + * pm_runtime_put_autosuspend - Update the last access time of a device, drop + * its usage counter and queue autosuspend if the usage counter becomes 0. * @dev: Target device. * - * Decrement the runtime PM usage counter of @dev and if it turns out to be - * equal to 0, queue up a work item for @dev like in pm_request_autosuspend(). + * Update the last access time of @dev, decrement runtime PM usage counter of + * @dev and if it turns out to be equal to 0, queue up a work item for @dev like + * in pm_request_autosuspend(). + * + * Return: + * * 0: Success. + * * -EINVAL: Runtime PM error. + * * -EACCES: Runtime PM disabled. + * * -EAGAIN: Runtime PM usage_count non-zero or Runtime PM status change ongoing. + * * -EBUSY: Runtime PM child_count non-zero. + * * -EPERM: Device PM QoS resume latency 0. + * * -EINPROGRESS: Suspend already in progress. + * * -ENOSYS: CONFIG_PM not enabled. + * * 1: Device already suspended. */ static inline int pm_runtime_put_autosuspend(struct device *dev) { - return __pm_runtime_suspend(dev, - RPM_GET_PUT | RPM_ASYNC | RPM_AUTO); + pm_runtime_mark_last_busy(dev); + return __pm_runtime_put_autosuspend(dev); } /** @@ -482,9 +615,20 @@ static inline int pm_runtime_put_autosuspend(struct device *dev) * return value, set up autosuspend of @dev or suspend it (depending on whether * or not autosuspend has been enabled for it). * - * The possible return values of this function are the same as for - * pm_runtime_idle() and the runtime PM usage counter of @dev remains - * decremented in all cases, even if it returns an error code. + * The runtime PM usage counter of @dev remains decremented in all cases, even + * if it returns an error code. + * + * Return: + * * 0: Success. + * * -EINVAL: Runtime PM error. + * * -EACCES: Runtime PM disabled. + * * -EAGAIN: Runtime PM usage_count non-zero or Runtime PM status change ongoing. + * * -EBUSY: Runtime PM child_count non-zero. + * * -EPERM: Device PM QoS resume latency 0. + * * -ENOSYS: CONFIG_PM not enabled. + * * 1: Device already suspended. + * Other values and conditions for the above values are possible as returned by + * Runtime PM suspend callbacks. */ static inline int pm_runtime_put_sync(struct device *dev) { @@ -498,9 +642,21 @@ static inline int pm_runtime_put_sync(struct device *dev) * Decrement the runtime PM usage counter of @dev and if it turns out to be * equal to 0, carry out runtime-suspend of @dev synchronously. * - * The possible return values of this function are the same as for - * pm_runtime_suspend() and the runtime PM usage counter of @dev remains - * decremented in all cases, even if it returns an error code. + * The runtime PM usage counter of @dev remains decremented in all cases, even + * if it returns an error code. + * + * Return: + * * 0: Success. + * * -EINVAL: Runtime PM error. + * * -EACCES: Runtime PM disabled. + * * -EAGAIN: Runtime PM usage_count non-zero or Runtime PM status change ongoing. + * * -EAGAIN: usage_count non-zero or Runtime PM status change ongoing. + * * -EBUSY: Runtime PM child_count non-zero. + * * -EPERM: Device PM QoS resume latency 0. + * * -ENOSYS: CONFIG_PM not enabled. + * * 1: Device already suspended. + * Other values and conditions for the above values are possible as returned by + * Runtime PM suspend callbacks. */ static inline int pm_runtime_put_sync_suspend(struct device *dev) { @@ -508,19 +664,34 @@ static inline int pm_runtime_put_sync_suspend(struct device *dev) } /** - * pm_runtime_put_sync_autosuspend - Drop device usage counter and autosuspend if 0. + * pm_runtime_put_sync_autosuspend - Update the last access time of a device, + * drop device usage counter and autosuspend if 0. * @dev: Target device. * - * Decrement the runtime PM usage counter of @dev and if it turns out to be - * equal to 0, set up autosuspend of @dev or suspend it synchronously (depending - * on whether or not autosuspend has been enabled for it). - * - * The possible return values of this function are the same as for - * pm_runtime_autosuspend() and the runtime PM usage counter of @dev remains - * decremented in all cases, even if it returns an error code. + * Update the last access time of @dev, decrement the runtime PM usage counter + * of @dev and if it turns out to be equal to 0, set up autosuspend of @dev or + * suspend it synchronously (depending on whether or not autosuspend has been + * enabled for it). + * + * The runtime PM usage counter of @dev remains decremented in all cases, even + * if it returns an error code. + * + * Return: + * * 0: Success. + * * -EINVAL: Runtime PM error. + * * -EACCES: Runtime PM disabled. + * * -EAGAIN: Runtime PM usage_count non-zero or Runtime PM status change ongoing. + * * -EBUSY: Runtime PM child_count non-zero. + * * -EPERM: Device PM QoS resume latency 0. + * * -EINPROGRESS: Suspend already in progress. + * * -ENOSYS: CONFIG_PM not enabled. + * * 1: Device already suspended. + * Other values and conditions for the above values are possible as returned by + * Runtime PM suspend callbacks. */ static inline int pm_runtime_put_sync_autosuspend(struct device *dev) { + pm_runtime_mark_last_busy(dev); return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO); } @@ -556,11 +727,18 @@ static inline int pm_runtime_set_suspended(struct device *dev) * pm_runtime_disable - Disable runtime PM for a device. * @dev: Target device. * - * Prevent the runtime PM framework from working with @dev (by incrementing its - * "blocking" counter). + * Prevent the runtime PM framework from working with @dev by incrementing its + * "disable" counter. + * + * If the counter is zero when this function runs and there is a pending runtime + * resume request for @dev, it will be resumed. If the counter is still zero at + * that point, all of the pending runtime PM requests for @dev will be canceled + * and all runtime PM operations in progress involving it will be waited for to + * complete. * - * For each invocation of this function for @dev there must be a matching - * pm_runtime_enable() call in order for runtime PM to be enabled for it. + * For each invocation of this function for @dev, there must be a matching + * pm_runtime_enable() call, so that runtime PM is eventually enabled for it + * again. */ static inline void pm_runtime_disable(struct device *dev) { |