b10d911749
Make it possible to register hibernation and suspend notifiers, so that subsystems can perform hibernation-related or suspend-related operations that should not be carried out by device drivers' .suspend() and .resume() routines. [akpm@linux-foundation.org: build fixes] [akpm@linux-foundation.org: cleanups] Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Nigel Cunningham <nigel@nigel.suspend2.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
130 lines
3.9 KiB
C
130 lines
3.9 KiB
C
#ifndef _LINUX_SWSUSP_H
|
|
#define _LINUX_SWSUSP_H
|
|
|
|
#if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32) || defined(CONFIG_PPC64)
|
|
#include <asm/suspend.h>
|
|
#endif
|
|
#include <linux/swap.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/init.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/mm.h>
|
|
|
|
/* 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 drain_local_pages(void);
|
|
extern void mark_free_pages(struct zone *zone);
|
|
|
|
#if defined(CONFIG_PM) && defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
|
|
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
|
|
|
|
/**
|
|
* struct hibernation_ops - hibernation platform support
|
|
*
|
|
* The methods in this structure allow a platform to override the default
|
|
* mechanism of shutting down the machine during a hibernation transition.
|
|
*
|
|
* All three methods must be assigned.
|
|
*
|
|
* @prepare: prepare system for hibernation
|
|
* @enter: shut down system after state has been saved to disk
|
|
* @finish: finish/clean up after state has been reloaded
|
|
* @pre_restore: prepare system for the restoration from a hibernation image
|
|
* @restore_cleanup: clean up after a failing image restoration
|
|
*/
|
|
struct hibernation_ops {
|
|
int (*prepare)(void);
|
|
int (*enter)(void);
|
|
void (*finish)(void);
|
|
int (*pre_restore)(void);
|
|
void (*restore_cleanup)(void);
|
|
};
|
|
|
|
#ifdef CONFIG_PM
|
|
#ifdef CONFIG_SOFTWARE_SUSPEND
|
|
/* kernel/power/snapshot.c */
|
|
extern void __register_nosave_region(unsigned long b, unsigned long e, int km);
|
|
static inline void register_nosave_region(unsigned long b, unsigned long e)
|
|
{
|
|
__register_nosave_region(b, e, 0);
|
|
}
|
|
static inline void 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(struct hibernation_ops *ops);
|
|
extern int hibernate(void);
|
|
#else /* CONFIG_SOFTWARE_SUSPEND */
|
|
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(struct hibernation_ops *ops) {}
|
|
static inline int hibernate(void) { return -ENOSYS; }
|
|
#endif /* CONFIG_SOFTWARE_SUSPEND */
|
|
|
|
void save_processor_state(void);
|
|
void restore_processor_state(void);
|
|
struct saved_context;
|
|
void __save_processor_state(struct saved_context *ctxt);
|
|
void __restore_processor_state(struct saved_context *ctxt);
|
|
|
|
/* kernel/power/main.c */
|
|
extern struct blocking_notifier_head pm_chain_head;
|
|
|
|
static inline int register_pm_notifier(struct notifier_block *nb)
|
|
{
|
|
return blocking_notifier_chain_register(&pm_chain_head, nb);
|
|
}
|
|
|
|
static inline int unregister_pm_notifier(struct notifier_block *nb)
|
|
{
|
|
return blocking_notifier_chain_unregister(&pm_chain_head, nb);
|
|
}
|
|
|
|
#define pm_notifier(fn, pri) { \
|
|
static struct notifier_block fn##_nb = \
|
|
{ .notifier_call = fn, .priority = pri }; \
|
|
register_pm_notifier(&fn##_nb); \
|
|
}
|
|
#else /* CONFIG_PM */
|
|
|
|
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)
|
|
#endif /* CONFIG_PM */
|
|
|
|
#if !defined CONFIG_SOFTWARE_SUSPEND || !defined(CONFIG_PM)
|
|
static inline void register_nosave_region(unsigned long b, unsigned long e)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#endif /* _LINUX_SWSUSP_H */
|