diff options
| -rw-r--r-- | Documentation/power/runtime_pm.txt | 32 | ||||
| -rw-r--r-- | drivers/base/power/generic_ops.c | 98 | ||||
| -rw-r--r-- | include/linux/pm.h | 6 |
3 files changed, 119 insertions, 17 deletions
diff --git a/Documentation/power/runtime_pm.txt b/Documentation/power/runtime_pm.txt index b24875b1ced5..4b011b171be4 100644 --- a/Documentation/power/runtime_pm.txt +++ b/Documentation/power/runtime_pm.txt @@ -606,32 +606,60 @@ driver/base/power/generic_ops.c: callback provided by its driver and return its result, or return 0 if not defined + int pm_generic_suspend_noirq(struct device *dev); + - if pm_runtime_suspended(dev) returns "false", invoke the ->suspend_noirq() + callback provided by the device's driver and return its result, or return + 0 if not defined + int pm_generic_resume(struct device *dev); - invoke the ->resume() callback provided by the driver of this device and, if successful, change the device's runtime PM status to 'active' + int pm_generic_resume_noirq(struct device *dev); + - invoke the ->resume_noirq() callback provided by the driver of this device + int pm_generic_freeze(struct device *dev); - if the device has not been suspended at run time, invoke the ->freeze() callback provided by its driver and return its result, or return 0 if not defined + int pm_generic_freeze_noirq(struct device *dev); + - if pm_runtime_suspended(dev) returns "false", invoke the ->freeze_noirq() + callback provided by the device's driver and return its result, or return + 0 if not defined + int pm_generic_thaw(struct device *dev); - if the device has not been suspended at run time, invoke the ->thaw() callback provided by its driver and return its result, or return 0 if not defined + int pm_generic_thaw_noirq(struct device *dev); + - if pm_runtime_suspended(dev) returns "false", invoke the ->thaw_noirq() + callback provided by the device's driver and return its result, or return + 0 if not defined + int pm_generic_poweroff(struct device *dev); - if the device has not been suspended at run time, invoke the ->poweroff() callback provided by its driver and return its result, or return 0 if not defined + int pm_generic_poweroff_noirq(struct device *dev); + - if pm_runtime_suspended(dev) returns "false", run the ->poweroff_noirq() + callback provided by the device's driver and return its result, or return + 0 if not defined + int pm_generic_restore(struct device *dev); - invoke the ->restore() callback provided by the driver of this device and, if successful, change the device's runtime PM status to 'active' + int pm_generic_restore_noirq(struct device *dev); + - invoke the ->restore_noirq() callback provided by the device's driver + These functions can be assigned to the ->runtime_idle(), ->runtime_suspend(), -->runtime_resume(), ->suspend(), ->resume(), ->freeze(), ->thaw(), ->poweroff(), -or ->restore() callback pointers in the subsystem-level dev_pm_ops structures. +->runtime_resume(), ->suspend(), ->suspend_noirq(), ->resume(), +->resume_noirq(), ->freeze(), ->freeze_noirq(), ->thaw(), ->thaw_noirq(), +->poweroff(), ->poweroff_noirq(), ->restore(), ->restore_noirq() callback +pointers in the subsystem-level dev_pm_ops structures. If a subsystem wishes to use all of them at the same time, it can simply assign the GENERIC_SUBSYS_PM_OPS macro, defined in include/linux/pm.h, to its diff --git a/drivers/base/power/generic_ops.c b/drivers/base/power/generic_ops.c index cb3bb368681c..9508df71274b 100644 --- a/drivers/base/power/generic_ops.c +++ b/drivers/base/power/generic_ops.c @@ -94,12 +94,13 @@ int pm_generic_prepare(struct device *dev) * __pm_generic_call - Generic suspend/freeze/poweroff/thaw subsystem callback. * @dev: Device to handle. * @event: PM transition of the system under way. + * @bool: Whether or not this is the "noirq" stage. * * If the device has not been suspended at run time, execute the * suspend/freeze/poweroff/thaw callback provided by its driver, if defined, and * return its error code. Otherwise, return zero. */ -static int __pm_generic_call(struct device *dev, int event) +static int __pm_generic_call(struct device *dev, int event, bool noirq) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; int (*callback)(struct device *); @@ -109,16 +110,16 @@ static int __pm_generic_call(struct device *dev, int event) switch (event) { case PM_EVENT_SUSPEND: - callback = pm->suspend; + callback = noirq ? pm->suspend_noirq : pm->suspend; break; case PM_EVENT_FREEZE: - callback = pm->freeze; + callback = noirq ? pm->freeze_noirq : pm->freeze; break; case PM_EVENT_HIBERNATE: - callback = pm->poweroff; + callback = noirq ? pm->poweroff_noirq : pm->poweroff; break; case PM_EVENT_THAW: - callback = pm->thaw; + callback = noirq ? pm->thaw_noirq : pm->thaw; break; default: callback = NULL; @@ -129,42 +130,82 @@ static int __pm_generic_call(struct device *dev, int event) } /** + * pm_generic_suspend_noirq - Generic suspend_noirq callback for subsystems. + * @dev: Device to suspend. + */ +int pm_generic_suspend_noirq(struct device *dev) +{ + return __pm_generic_call(dev, PM_EVENT_SUSPEND, true); +} +EXPORT_SYMBOL_GPL(pm_generic_suspend_noirq); + +/** * pm_generic_suspend - Generic suspend callback for subsystems. * @dev: Device to suspend. */ int pm_generic_suspend(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_SUSPEND); + return __pm_generic_call(dev, PM_EVENT_SUSPEND, false); } EXPORT_SYMBOL_GPL(pm_generic_suspend); /** + * pm_generic_freeze_noirq - Generic freeze_noirq callback for subsystems. + * @dev: Device to freeze. + */ +int pm_generic_freeze_noirq(struct device *dev) +{ + return __pm_generic_call(dev, PM_EVENT_FREEZE, true); +} +EXPORT_SYMBOL_GPL(pm_generic_freeze_noirq); + +/** * pm_generic_freeze - Generic freeze callback for subsystems. * @dev: Device to freeze. */ int pm_generic_freeze(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_FREEZE); + return __pm_generic_call(dev, PM_EVENT_FREEZE, false); } EXPORT_SYMBOL_GPL(pm_generic_freeze); /** + * pm_generic_poweroff_noirq - Generic poweroff_noirq callback for subsystems. + * @dev: Device to handle. + */ +int pm_generic_poweroff_noirq(struct device *dev) +{ + return __pm_generic_call(dev, PM_EVENT_HIBERNATE, true); +} +EXPORT_SYMBOL_GPL(pm_generic_poweroff_noirq); + +/** * pm_generic_poweroff - Generic poweroff callback for subsystems. * @dev: Device to handle. */ int pm_generic_poweroff(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_HIBERNATE); + return __pm_generic_call(dev, PM_EVENT_HIBERNATE, false); } EXPORT_SYMBOL_GPL(pm_generic_poweroff); /** + * pm_generic_thaw_noirq - Generic thaw_noirq callback for subsystems. + * @dev: Device to thaw. + */ +int pm_generic_thaw_noirq(struct device *dev) +{ + return __pm_generic_call(dev, PM_EVENT_THAW, true); +} +EXPORT_SYMBOL_GPL(pm_generic_thaw_noirq); + +/** * pm_generic_thaw - Generic thaw callback for subsystems. * @dev: Device to thaw. */ int pm_generic_thaw(struct device *dev) { - return __pm_generic_call(dev, PM_EVENT_THAW); + return __pm_generic_call(dev, PM_EVENT_THAW, false); } EXPORT_SYMBOL_GPL(pm_generic_thaw); @@ -172,12 +213,13 @@ EXPORT_SYMBOL_GPL(pm_generic_thaw); * __pm_generic_resume - Generic resume/restore callback for subsystems. * @dev: Device to handle. * @event: PM transition of the system under way. + * @bool: Whether or not this is the "noirq" stage. * * Execute the resume/resotre callback provided by the @dev's driver, if * defined. If it returns 0, change the device's runtime PM status to 'active'. * Return the callback's error code. */ -static int __pm_generic_resume(struct device *dev, int event) +static int __pm_generic_resume(struct device *dev, int event, bool noirq) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; int (*callback)(struct device *); @@ -188,10 +230,10 @@ static int __pm_generic_resume(struct device *dev, int event) switch (event) { case PM_EVENT_RESUME: - callback = pm->resume; + callback = noirq ? pm->resume_noirq : pm->resume; break; case PM_EVENT_RESTORE: - callback = pm->restore; + callback = noirq ? pm->restore_noirq : pm->restore; break; default: callback = NULL; @@ -202,7 +244,7 @@ static int __pm_generic_resume(struct device *dev, int event) return 0; ret = callback(dev); - if (!ret && pm_runtime_enabled(dev)) { + if (!ret && !noirq && pm_runtime_enabled(dev)) { pm_runtime_disable(dev); pm_runtime_set_active(dev); pm_runtime_enable(dev); @@ -212,22 +254,42 @@ static int __pm_generic_resume(struct device *dev, int event) } /** + * pm_generic_resume_noirq - Generic resume_noirq callback for subsystems. + * @dev: Device to resume. + */ +int pm_generic_resume_noirq(struct device *dev) +{ + return __pm_generic_resume(dev, PM_EVENT_RESUME, true); +} +EXPORT_SYMBOL_GPL(pm_generic_resume_noirq); + +/** * pm_generic_resume - Generic resume callback for subsystems. * @dev: Device to resume. */ int pm_generic_resume(struct device *dev) { - return __pm_generic_resume(dev, PM_EVENT_RESUME); + return __pm_generic_resume(dev, PM_EVENT_RESUME, false); } EXPORT_SYMBOL_GPL(pm_generic_resume); /** + * pm_generic_restore_noirq - Generic restore_noirq callback for subsystems. + * @dev: Device to restore. + */ +int pm_generic_restore_noirq(struct device *dev) +{ + return __pm_generic_resume(dev, PM_EVENT_RESTORE, true); +} +EXPORT_SYMBOL_GPL(pm_generic_restore_noirq); + +/** * pm_generic_restore - Generic restore callback for subsystems. * @dev: Device to restore. */ int pm_generic_restore(struct device *dev) { - return __pm_generic_resume(dev, PM_EVENT_RESTORE); + return __pm_generic_resume(dev, PM_EVENT_RESTORE, false); } EXPORT_SYMBOL_GPL(pm_generic_restore); @@ -256,11 +318,17 @@ struct dev_pm_ops generic_subsys_pm_ops = { #ifdef CONFIG_PM_SLEEP .prepare = pm_generic_prepare, .suspend = pm_generic_suspend, + .suspend_noirq = pm_generic_suspend_noirq, .resume = pm_generic_resume, + .resume_noirq = pm_generic_resume_noirq, .freeze = pm_generic_freeze, + .freeze_noirq = pm_generic_freeze_noirq, .thaw = pm_generic_thaw, + .thaw_noirq = pm_generic_thaw_noirq, .poweroff = pm_generic_poweroff, + .poweroff_noirq = pm_generic_poweroff_noirq, .restore = pm_generic_restore, + .restore_noirq = pm_generic_restore_noirq, .complete = pm_generic_complete, #endif #ifdef CONFIG_PM_RUNTIME diff --git a/include/linux/pm.h b/include/linux/pm.h index 7e8f0763d1ec..f7c84c9abd30 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -553,11 +553,17 @@ extern void __suspend_report_result(const char *function, void *fn, int ret); extern int device_pm_wait_for_dev(struct device *sub, struct device *dev); extern int pm_generic_prepare(struct device *dev); +extern int pm_generic_suspend_noirq(struct device *dev); extern int pm_generic_suspend(struct device *dev); +extern int pm_generic_resume_noirq(struct device *dev); extern int pm_generic_resume(struct device *dev); +extern int pm_generic_freeze_noirq(struct device *dev); extern int pm_generic_freeze(struct device *dev); +extern int pm_generic_thaw_noirq(struct device *dev); extern int pm_generic_thaw(struct device *dev); +extern int pm_generic_restore_noirq(struct device *dev); extern int pm_generic_restore(struct device *dev); +extern int pm_generic_poweroff_noirq(struct device *dev); extern int pm_generic_poweroff(struct device *dev); extern void pm_generic_complete(struct device *dev); |