diff options
Diffstat (limited to 'ANDROID_3.4.5/include/linux/suspend.h')
| -rw-r--r-- | ANDROID_3.4.5/include/linux/suspend.h | 456 |
1 files changed, 0 insertions, 456 deletions
diff --git a/ANDROID_3.4.5/include/linux/suspend.h b/ANDROID_3.4.5/include/linux/suspend.h deleted file mode 100644 index a79a28f5..00000000 --- a/ANDROID_3.4.5/include/linux/suspend.h +++ /dev/null @@ -1,456 +0,0 @@ -#ifndef _LINUX_SUSPEND_H -#define _LINUX_SUSPEND_H - -#include <linux/swap.h> -#include <linux/notifier.h> -#include <linux/init.h> -#include <linux/pm.h> -#include <linux/mm.h> -#include <linux/freezer.h> -#include <asm/errno.h> - -#ifdef CONFIG_VT -extern void pm_set_vt_switch(int); -#else -static inline void pm_set_vt_switch(int do_switch) -{ -} -#endif - -#ifdef CONFIG_VT_CONSOLE_SLEEP -extern int pm_prepare_console(void); -extern void pm_restore_console(void); -#else -static inline int pm_prepare_console(void) -{ - return 0; -} - -static inline void pm_restore_console(void) -{ -} -#endif - -typedef int __bitwise suspend_state_t; - -#define PM_SUSPEND_ON ((__force suspend_state_t) 0) -#define PM_SUSPEND_STANDBY ((__force suspend_state_t) 1) -#define PM_SUSPEND_MEM ((__force suspend_state_t) 3) -#define PM_SUSPEND_MAX ((__force suspend_state_t) 4) - -enum suspend_stat_step { - SUSPEND_FREEZE = 1, - SUSPEND_PREPARE, - SUSPEND_SUSPEND, - SUSPEND_SUSPEND_LATE, - SUSPEND_SUSPEND_NOIRQ, - SUSPEND_RESUME_NOIRQ, - SUSPEND_RESUME_EARLY, - SUSPEND_RESUME -}; - -struct suspend_stats { - int success; - int fail; - int failed_freeze; - int failed_prepare; - int failed_suspend; - int failed_suspend_late; - int failed_suspend_noirq; - int failed_resume; - int failed_resume_early; - int failed_resume_noirq; -#define REC_FAILED_NUM 2 - int last_failed_dev; - char failed_devs[REC_FAILED_NUM][40]; - int last_failed_errno; - int errno[REC_FAILED_NUM]; - int last_failed_step; - enum suspend_stat_step failed_steps[REC_FAILED_NUM]; -}; - -extern struct suspend_stats suspend_stats; - -static inline void dpm_save_failed_dev(const char *name) -{ - strlcpy(suspend_stats.failed_devs[suspend_stats.last_failed_dev], - name, - sizeof(suspend_stats.failed_devs[0])); - suspend_stats.last_failed_dev++; - suspend_stats.last_failed_dev %= REC_FAILED_NUM; -} - -static inline void dpm_save_failed_errno(int err) -{ - suspend_stats.errno[suspend_stats.last_failed_errno] = err; - suspend_stats.last_failed_errno++; - suspend_stats.last_failed_errno %= REC_FAILED_NUM; -} - -static inline void dpm_save_failed_step(enum suspend_stat_step step) -{ - suspend_stats.failed_steps[suspend_stats.last_failed_step] = step; - suspend_stats.last_failed_step++; - suspend_stats.last_failed_step %= REC_FAILED_NUM; -} - -/** - * struct platform_suspend_ops - Callbacks for managing platform dependent - * system sleep states. - * - * @valid: Callback to determine if given system sleep state is supported by - * the platform. - * Valid (ie. supported) states are advertised in /sys/power/state. Note - * that it still may be impossible to enter given system sleep state if the - * conditions aren't right. - * There is the %suspend_valid_only_mem function available that can be - * assigned to this if the platform only supports mem sleep. - * - * @begin: Initialise a transition to given system sleep state. - * @begin() is executed right prior to suspending devices. The information - * conveyed to the platform code by @begin() should be disregarded by it as - * soon as @end() is executed. If @begin() fails (ie. returns nonzero), - * @prepare(), @enter() and @finish() will not be called by the PM core. - * This callback is optional. However, if it is implemented, the argument - * passed to @enter() is redundant and should be ignored. - * - * @prepare: Prepare the platform for entering the system sleep state indicated - * by @begin(). - * @prepare() is called right after devices have been suspended (ie. the - * appropriate .suspend() method has been executed for each device) and - * before device drivers' late suspend callbacks are executed. It returns - * 0 on success or a negative error code otherwise, in which case the - * system cannot enter the desired sleep state (@prepare_late(), @enter(), - * and @wake() will not be called in that case). - * - * @prepare_late: Finish preparing the platform for entering the system sleep - * state indicated by @begin(). - * @prepare_late is called before disabling nonboot CPUs and after - * device drivers' late suspend callbacks have been executed. It returns - * 0 on success or a negative error code otherwise, in which case the - * system cannot enter the desired sleep state (@enter() will not be - * executed). - * - * @enter: Enter the system sleep state indicated by @begin() or represented by - * the argument if @begin() is not implemented. - * This callback is mandatory. It returns 0 on success or a negative - * error code otherwise, in which case the system cannot enter the desired - * sleep state. - * - * @wake: Called when the system has just left a sleep state, right after - * the nonboot CPUs have been enabled and before device drivers' early - * resume callbacks are executed. - * This callback is optional, but should be implemented by the platforms - * that implement @prepare_late(). If implemented, it is always called - * after @prepare_late and @enter(), even if one of them fails. - * - * @finish: Finish wake-up of the platform. - * @finish is called right prior to calling device drivers' regular suspend - * callbacks. - * This callback is optional, but should be implemented by the platforms - * that implement @prepare(). If implemented, it is always called after - * @enter() and @wake(), even if any of them fails. It is executed after - * a failing @prepare. - * - * @suspend_again: Returns whether the system should suspend again (true) or - * not (false). If the platform wants to poll sensors or execute some - * code during suspended without invoking userspace and most of devices, - * suspend_again callback is the place assuming that periodic-wakeup or - * alarm-wakeup is already setup. This allows to execute some codes while - * being kept suspended in the view of userland and devices. - * - * @end: Called by the PM core right after resuming devices, to indicate to - * the platform that the system has returned to the working state or - * the transition to the sleep state has been aborted. - * This callback is optional, but should be implemented by the platforms - * that implement @begin(). Accordingly, platforms implementing @begin() - * should also provide a @end() which cleans up transitions aborted before - * @enter(). - * - * @recover: Recover the platform from a suspend failure. - * Called by the PM core if the suspending of devices fails. - * This callback is optional and should only be implemented by platforms - * which require special recovery actions in that situation. - */ -struct platform_suspend_ops { - int (*valid)(suspend_state_t state); - int (*begin)(suspend_state_t state); - int (*prepare)(void); - int (*prepare_late)(void); - int (*enter)(suspend_state_t state); - void (*wake)(void); - void (*finish)(void); - bool (*suspend_again)(void); - void (*end)(void); - void (*recover)(void); -}; - -#ifdef CONFIG_SUSPEND -/** - * suspend_set_ops - set platform dependent suspend operations - * @ops: The new suspend operations to set. - */ -extern void suspend_set_ops(const struct platform_suspend_ops *ops); -extern int suspend_valid_only_mem(suspend_state_t state); - -/** - * arch_suspend_disable_irqs - disable IRQs for suspend - * - * Disables IRQs (in the default case). This is a weak symbol in the common - * code and thus allows architectures to override it if more needs to be - * done. Not called for suspend to disk. - */ -extern void arch_suspend_disable_irqs(void); - -/** - * arch_suspend_enable_irqs - enable IRQs after suspend - * - * Enables IRQs (in the default case). This is a weak symbol in the common - * code and thus allows architectures to override it if more needs to be - * done. Not called for suspend to disk. - */ -extern void arch_suspend_enable_irqs(void); - -extern int pm_suspend(suspend_state_t state); -#else /* !CONFIG_SUSPEND */ -#define suspend_valid_only_mem NULL - -static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {} -static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; } -#endif /* !CONFIG_SUSPEND */ - -/* struct pbe is used for creating lists of pages that should be restored - * atomically during the resume from disk, because the page frames they have - * occupied before the suspend are in use. - */ -struct pbe { - void *address; /* address of the copy */ - void *orig_address; /* original address of a page */ - struct pbe *next; -}; - -/* mm/page_alloc.c */ -extern void mark_free_pages(struct zone *zone); - -/** - * struct platform_hibernation_ops - hibernation platform support - * - * The methods in this structure allow a platform to carry out special - * operations required by it during a hibernation transition. - * - * All the methods below, except for @recover(), must be implemented. - * - * @begin: Tell the platform driver that we're starting hibernation. - * Called right after shrinking memory and before freezing devices. - * - * @end: Called by the PM core right after resuming devices, to indicate to - * the platform that the system has returned to the working state. - * - * @pre_snapshot: Prepare the platform for creating the hibernation image. - * Called right after devices have been frozen and before the nonboot - * CPUs are disabled (runs with IRQs on). - * - * @finish: Restore the previous state of the platform after the hibernation - * image has been created *or* put the platform into the normal operation - * mode after the hibernation (the same method is executed in both cases). - * Called right after the nonboot CPUs have been enabled and before - * thawing devices (runs with IRQs on). - * - * @prepare: Prepare the platform for entering the low power state. - * Called right after the hibernation image has been saved and before - * devices are prepared for entering the low power state. - * - * @enter: Put the system into the low power state after the hibernation image - * has been saved to disk. - * Called after the nonboot CPUs have been disabled and all of the low - * level devices have been shut down (runs with IRQs off). - * - * @leave: Perform the first stage of the cleanup after the system sleep state - * indicated by @set_target() has been left. - * Called right after the control has been passed from the boot kernel to - * the image kernel, before the nonboot CPUs are enabled and before devices - * are resumed. Executed with interrupts disabled. - * - * @pre_restore: Prepare system for the restoration from a hibernation image. - * Called right after devices have been frozen and before the nonboot - * CPUs are disabled (runs with IRQs on). - * - * @restore_cleanup: Clean up after a failing image restoration. - * Called right after the nonboot CPUs have been enabled and before - * thawing devices (runs with IRQs on). - * - * @recover: Recover the platform from a failure to suspend devices. - * Called by the PM core if the suspending of devices during hibernation - * fails. This callback is optional and should only be implemented by - * platforms which require special recovery actions in that situation. - */ -struct platform_hibernation_ops { - int (*begin)(void); - void (*end)(void); - int (*pre_snapshot)(void); - void (*finish)(void); - int (*prepare)(void); - int (*enter)(void); - void (*leave)(void); - int (*pre_restore)(void); - void (*restore_cleanup)(void); - void (*recover)(void); -}; - -#ifdef CONFIG_HIBERNATION -/* kernel/power/snapshot.c */ -extern void __register_nosave_region(unsigned long b, unsigned long e, int km); -static inline void __init register_nosave_region(unsigned long b, unsigned long e) -{ - __register_nosave_region(b, e, 0); -} -static inline void __init register_nosave_region_late(unsigned long b, unsigned long e) -{ - __register_nosave_region(b, e, 1); -} -extern int swsusp_page_is_forbidden(struct page *); -extern void swsusp_set_page_free(struct page *); -extern void swsusp_unset_page_free(struct page *); -extern unsigned long get_safe_page(gfp_t gfp_mask); - -extern void hibernation_set_ops(const struct platform_hibernation_ops *ops); -extern int hibernate(void); -extern bool system_entering_hibernation(void); -#else /* CONFIG_HIBERNATION */ -static inline void register_nosave_region(unsigned long b, unsigned long e) {} -static inline void register_nosave_region_late(unsigned long b, unsigned long e) {} -static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } -static inline void swsusp_set_page_free(struct page *p) {} -static inline void swsusp_unset_page_free(struct page *p) {} - -static inline void hibernation_set_ops(const struct platform_hibernation_ops *ops) {} -static inline int hibernate(void) { return -ENOSYS; } -static inline bool system_entering_hibernation(void) { return false; } -#endif /* CONFIG_HIBERNATION */ - -/* Hibernation and suspend events */ -#define PM_HIBERNATION_PREPARE 0x0001 /* Going to hibernate */ -#define PM_POST_HIBERNATION 0x0002 /* Hibernation finished */ -#define PM_SUSPEND_PREPARE 0x0003 /* Going to suspend the system */ -#define PM_POST_SUSPEND 0x0004 /* Suspend finished */ -#define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */ -#define PM_POST_RESTORE 0x0006 /* Restore failed */ -#define PM_HIBERNATION_FINISH 0x0007 -extern struct mutex pm_mutex; - -#ifdef CONFIG_PM_SLEEP -void save_processor_state(void); -void restore_processor_state(void); - -/* kernel/power/main.c */ -extern int register_pm_notifier(struct notifier_block *nb); -extern int unregister_pm_notifier(struct notifier_block *nb); - -#define pm_notifier(fn, pri) { \ - static struct notifier_block fn##_nb = \ - { .notifier_call = fn, .priority = pri }; \ - register_pm_notifier(&fn##_nb); \ -} - -/* drivers/base/power/wakeup.c */ -extern bool events_check_enabled; - -extern bool pm_wakeup_pending(void); -extern bool pm_get_wakeup_count(unsigned int *count, bool block); -extern bool pm_save_wakeup_count(unsigned int count); -extern void pm_wakep_autosleep_enabled(bool set); - -static inline void lock_system_sleep(void) -{ - current->flags |= PF_FREEZER_SKIP; - mutex_lock(&pm_mutex); -} - -static inline void unlock_system_sleep(void) -{ - /* - * Don't use freezer_count() because we don't want the call to - * try_to_freeze() here. - * - * Reason: - * Fundamentally, we just don't need it, because freezing condition - * doesn't come into effect until we release the pm_mutex lock, - * since the freezer always works with pm_mutex held. - * - * More importantly, in the case of hibernation, - * unlock_system_sleep() gets called in snapshot_read() and - * snapshot_write() when the freezing condition is still in effect. - * Which means, if we use try_to_freeze() here, it would make them - * enter the refrigerator, thus causing hibernation to lockup. - */ - current->flags &= ~PF_FREEZER_SKIP; - mutex_unlock(&pm_mutex); -} - -#else /* !CONFIG_PM_SLEEP */ - -static inline int register_pm_notifier(struct notifier_block *nb) -{ - return 0; -} - -static inline int unregister_pm_notifier(struct notifier_block *nb) -{ - return 0; -} - -#define pm_notifier(fn, pri) do { (void)(fn); } while (0) - -static inline bool pm_wakeup_pending(void) { return false; } - -static inline void lock_system_sleep(void) {} -static inline void unlock_system_sleep(void) {} - -#endif /* !CONFIG_PM_SLEEP */ - -#ifdef CONFIG_PM_AUTOSLEEP - -/* kernel/power/autosleep.c */ -void queue_up_suspend_work(void); - -#else /* !CONFIG_PM_AUTOSLEEP */ - -static inline void queue_up_suspend_work(void) {} - -#endif /* !CONFIG_PM_AUTOSLEEP */ - -#ifdef CONFIG_ARCH_SAVE_PAGE_KEYS -/* - * The ARCH_SAVE_PAGE_KEYS functions can be used by an architecture - * to save/restore additional information to/from the array of page - * frame numbers in the hibernation image. For s390 this is used to - * save and restore the storage key for each page that is included - * in the hibernation image. - */ -unsigned long page_key_additional_pages(unsigned long pages); -int page_key_alloc(unsigned long pages); -void page_key_free(void); -void page_key_read(unsigned long *pfn); -void page_key_memorize(unsigned long *pfn); -void page_key_write(void *address); - -#else /* !CONFIG_ARCH_SAVE_PAGE_KEYS */ - -static inline unsigned long page_key_additional_pages(unsigned long pages) -{ - return 0; -} - -static inline int page_key_alloc(unsigned long pages) -{ - return 0; -} - -static inline void page_key_free(void) {} -static inline void page_key_read(unsigned long *pfn) {} -static inline void page_key_memorize(unsigned long *pfn) {} -static inline void page_key_write(void *address) {} - -#endif /* !CONFIG_ARCH_SAVE_PAGE_KEYS */ - -#endif /* _LINUX_SUSPEND_H */ |