forked from luck/tmp_suning_uos_patched
26398a70ea
The name of 'struct pm_ops' suggests that it is related to the power management in general, but in fact it is only related to suspend. Moreover, its name should indicate what this structure is used for, so it seems reasonable to change it to 'struct platform_suspend_ops'. In that case, the name of the global variable of this type used by the PM core and the names of related functions should be changed accordingly. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
233 lines
8.1 KiB
C
233 lines
8.1 KiB
C
#ifndef _LINUX_SUSPEND_H
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#define _LINUX_SUSPEND_H
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#if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32) || defined(CONFIG_PPC64)
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#include <asm/suspend.h>
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#endif
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#include <linux/swap.h>
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#include <linux/notifier.h>
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#include <linux/init.h>
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#include <linux/pm.h>
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#include <linux/mm.h>
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#include <asm/errno.h>
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#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
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extern int pm_prepare_console(void);
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extern void pm_restore_console(void);
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#else
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static inline int pm_prepare_console(void) { return 0; }
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static inline void pm_restore_console(void) {}
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#endif
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typedef int __bitwise suspend_state_t;
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#define PM_SUSPEND_ON ((__force suspend_state_t) 0)
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#define PM_SUSPEND_STANDBY ((__force suspend_state_t) 1)
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#define PM_SUSPEND_MEM ((__force suspend_state_t) 3)
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#define PM_SUSPEND_MAX ((__force suspend_state_t) 4)
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/**
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* struct platform_suspend_ops - Callbacks for managing platform dependent
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* system sleep states.
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*
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* @valid: Callback to determine if given system sleep state is supported by
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* the platform.
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* Valid (ie. supported) states are advertised in /sys/power/state. Note
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* that it still may be impossible to enter given system sleep state if the
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* conditions aren't right.
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* There is the %suspend_valid_only_mem function available that can be
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* assigned to this if the platform only supports mem sleep.
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*
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* @set_target: Tell the platform which system sleep state is going to be
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* entered.
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* @set_target() is executed right prior to suspending devices. The
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* information conveyed to the platform code by @set_target() should be
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* disregarded by the platform as soon as @finish() is executed and if
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* @prepare() fails. If @set_target() fails (ie. returns nonzero),
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* @prepare(), @enter() and @finish() will not be called by the PM core.
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* This callback is optional. However, if it is implemented, the argument
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* passed to @prepare(), @enter() and @finish() is meaningless and should
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* be ignored.
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*
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* @prepare: Prepare the platform for entering the system sleep state indicated
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* by @set_target() or represented by the argument if @set_target() is not
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* implemented.
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* @prepare() is called right after devices have been suspended (ie. the
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* appropriate .suspend() method has been executed for each device) and
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* before the nonboot CPUs are disabled (it is executed with IRQs enabled).
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* This callback is optional. It returns 0 on success or a negative
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* error code otherwise, in which case the system cannot enter the desired
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* sleep state (@enter() and @finish() will not be called in that case).
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*
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* @enter: Enter the system sleep state indicated by @set_target() or
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* represented by the argument if @set_target() is not implemented.
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* This callback is mandatory. It returns 0 on success or a negative
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* error code otherwise, in which case the system cannot enter the desired
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* sleep state.
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*
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* @finish: Called when the system has just left a sleep state, right after
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* the nonboot CPUs have been enabled and before devices are resumed (it is
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* executed with IRQs enabled). If @set_target() is not implemented, the
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* argument represents the sleep state being left.
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* This callback is optional, but should be implemented by the platforms
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* that implement @prepare(). If implemented, it is always called after
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* @enter() (even if @enter() fails).
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*/
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struct platform_suspend_ops {
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int (*valid)(suspend_state_t state);
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int (*set_target)(suspend_state_t state);
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int (*prepare)(suspend_state_t state);
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int (*enter)(suspend_state_t state);
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int (*finish)(suspend_state_t state);
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};
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#ifdef CONFIG_SUSPEND
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extern struct platform_suspend_ops *suspend_ops;
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/**
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* suspend_set_ops - set platform dependent suspend operations
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* @ops: The new suspend operations to set.
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*/
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extern void suspend_set_ops(struct platform_suspend_ops *ops);
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extern int suspend_valid_only_mem(suspend_state_t state);
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/**
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* arch_suspend_disable_irqs - disable IRQs for suspend
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*
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* Disables IRQs (in the default case). This is a weak symbol in the common
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* code and thus allows architectures to override it if more needs to be
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* done. Not called for suspend to disk.
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*/
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extern void arch_suspend_disable_irqs(void);
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/**
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* arch_suspend_enable_irqs - enable IRQs after suspend
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*
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* Enables IRQs (in the default case). This is a weak symbol in the common
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* code and thus allows architectures to override it if more needs to be
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* done. Not called for suspend to disk.
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*/
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extern void arch_suspend_enable_irqs(void);
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extern int pm_suspend(suspend_state_t state);
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#else /* !CONFIG_SUSPEND */
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#define suspend_valid_only_mem NULL
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static inline void suspend_set_ops(struct platform_suspend_ops *ops) {}
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static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; }
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#endif /* !CONFIG_SUSPEND */
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/* struct pbe is used for creating lists of pages that should be restored
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* atomically during the resume from disk, because the page frames they have
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* occupied before the suspend are in use.
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*/
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struct pbe {
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void *address; /* address of the copy */
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void *orig_address; /* original address of a page */
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struct pbe *next;
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};
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/* mm/page_alloc.c */
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extern void drain_local_pages(void);
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extern void mark_free_pages(struct zone *zone);
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/**
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* struct hibernation_ops - hibernation platform support
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*
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* The methods in this structure allow a platform to override the default
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* mechanism of shutting down the machine during a hibernation transition.
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*
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* All three methods must be assigned.
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*
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* @prepare: prepare system for hibernation
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* @enter: shut down system after state has been saved to disk
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* @finish: finish/clean up after state has been reloaded
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* @pre_restore: prepare system for the restoration from a hibernation image
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* @restore_cleanup: clean up after a failing image restoration
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*/
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struct hibernation_ops {
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int (*prepare)(void);
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int (*enter)(void);
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void (*finish)(void);
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int (*pre_restore)(void);
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void (*restore_cleanup)(void);
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};
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#ifdef CONFIG_HIBERNATION
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/* kernel/power/snapshot.c */
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extern void __register_nosave_region(unsigned long b, unsigned long e, int km);
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static inline void register_nosave_region(unsigned long b, unsigned long e)
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{
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__register_nosave_region(b, e, 0);
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}
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static inline void register_nosave_region_late(unsigned long b, unsigned long e)
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{
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__register_nosave_region(b, e, 1);
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}
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extern int swsusp_page_is_forbidden(struct page *);
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extern void swsusp_set_page_free(struct page *);
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extern void swsusp_unset_page_free(struct page *);
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extern unsigned long get_safe_page(gfp_t gfp_mask);
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extern void hibernation_set_ops(struct hibernation_ops *ops);
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extern int hibernate(void);
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#else /* CONFIG_HIBERNATION */
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static inline int swsusp_page_is_forbidden(struct page *p) { return 0; }
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static inline void swsusp_set_page_free(struct page *p) {}
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static inline void swsusp_unset_page_free(struct page *p) {}
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static inline void hibernation_set_ops(struct hibernation_ops *ops) {}
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static inline int hibernate(void) { return -ENOSYS; }
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#endif /* CONFIG_HIBERNATION */
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#ifdef CONFIG_PM_SLEEP
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void save_processor_state(void);
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void restore_processor_state(void);
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struct saved_context;
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void __save_processor_state(struct saved_context *ctxt);
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void __restore_processor_state(struct saved_context *ctxt);
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/* kernel/power/main.c */
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extern struct blocking_notifier_head pm_chain_head;
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static inline int register_pm_notifier(struct notifier_block *nb)
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{
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return blocking_notifier_chain_register(&pm_chain_head, nb);
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}
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static inline int unregister_pm_notifier(struct notifier_block *nb)
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{
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return blocking_notifier_chain_unregister(&pm_chain_head, nb);
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}
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#define pm_notifier(fn, pri) { \
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static struct notifier_block fn##_nb = \
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{ .notifier_call = fn, .priority = pri }; \
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register_pm_notifier(&fn##_nb); \
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}
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#else /* !CONFIG_PM_SLEEP */
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static inline int register_pm_notifier(struct notifier_block *nb)
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{
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return 0;
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}
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static inline int unregister_pm_notifier(struct notifier_block *nb)
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{
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return 0;
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}
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#define pm_notifier(fn, pri) do { (void)(fn); } while (0)
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#endif /* !CONFIG_PM_SLEEP */
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#ifndef CONFIG_HIBERNATION
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static inline void register_nosave_region(unsigned long b, unsigned long e)
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{
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}
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static inline void register_nosave_region_late(unsigned long b, unsigned long e)
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{
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}
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#endif
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#endif /* _LINUX_SUSPEND_H */
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