mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
- Yosry has also eliminated cgroup's atomic rstat flushing. - Nhat Pham adds the new cachestat() syscall. It provides userspace with the ability to query pagecache status - a similar concept to mincore() but more powerful and with improved usability. - Mel Gorman provides more optimizations for compaction, reducing the prevalence of page rescanning. - Lorenzo Stoakes has done some maintanance work on the get_user_pages() interface. - Liam Howlett continues with cleanups and maintenance work to the maple tree code. Peng Zhang also does some work on maple tree. - Johannes Weiner has done some cleanup work on the compaction code. - David Hildenbrand has contributed additional selftests for get_user_pages(). - Thomas Gleixner has contributed some maintenance and optimization work for the vmalloc code. - Baolin Wang has provided some compaction cleanups, - SeongJae Park continues maintenance work on the DAMON code. - Huang Ying has done some maintenance on the swap code's usage of device refcounting. - Christoph Hellwig has some cleanups for the filemap/directio code. - Ryan Roberts provides two patch series which yield some rationalization of the kernel's access to pte entries - use the provided APIs rather than open-coding accesses. - Lorenzo Stoakes has some fixes to the interaction between pagecache and directio access to file mappings. - John Hubbard has a series of fixes to the MM selftesting code. - ZhangPeng continues the folio conversion campaign. - Hugh Dickins has been working on the pagetable handling code, mainly with a view to reducing the load on the mmap_lock. - Catalin Marinas has reduced the arm64 kmalloc() minimum alignment from 128 to 8. - Domenico Cerasuolo has improved the zswap reclaim mechanism by reorganizing the LRU management. - Matthew Wilcox provides some fixups to make gfs2 work better with the buffer_head code. - Vishal Moola also has done some folio conversion work. - Matthew Wilcox has removed the remnants of the pagevec code - their functionality is migrated over to struct folio_batch. -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZJejewAKCRDdBJ7gKXxA joggAPwKMfT9lvDBEUnJagY7dbDPky1cSYZdJKxxM2cApGa42gEA6Cl8HRAWqSOh J0qXCzqaaN8+BuEyLGDVPaXur9KirwY= =B7yQ -----END PGP SIGNATURE----- Merge tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull mm updates from Andrew Morton: - Yosry Ahmed brought back some cgroup v1 stats in OOM logs - Yosry has also eliminated cgroup's atomic rstat flushing - Nhat Pham adds the new cachestat() syscall. It provides userspace with the ability to query pagecache status - a similar concept to mincore() but more powerful and with improved usability - Mel Gorman provides more optimizations for compaction, reducing the prevalence of page rescanning - Lorenzo Stoakes has done some maintanance work on the get_user_pages() interface - Liam Howlett continues with cleanups and maintenance work to the maple tree code. Peng Zhang also does some work on maple tree - Johannes Weiner has done some cleanup work on the compaction code - David Hildenbrand has contributed additional selftests for get_user_pages() - Thomas Gleixner has contributed some maintenance and optimization work for the vmalloc code - Baolin Wang has provided some compaction cleanups, - SeongJae Park continues maintenance work on the DAMON code - Huang Ying has done some maintenance on the swap code's usage of device refcounting - Christoph Hellwig has some cleanups for the filemap/directio code - Ryan Roberts provides two patch series which yield some rationalization of the kernel's access to pte entries - use the provided APIs rather than open-coding accesses - Lorenzo Stoakes has some fixes to the interaction between pagecache and directio access to file mappings - John Hubbard has a series of fixes to the MM selftesting code - ZhangPeng continues the folio conversion campaign - Hugh Dickins has been working on the pagetable handling code, mainly with a view to reducing the load on the mmap_lock - Catalin Marinas has reduced the arm64 kmalloc() minimum alignment from 128 to 8 - Domenico Cerasuolo has improved the zswap reclaim mechanism by reorganizing the LRU management - Matthew Wilcox provides some fixups to make gfs2 work better with the buffer_head code - Vishal Moola also has done some folio conversion work - Matthew Wilcox has removed the remnants of the pagevec code - their functionality is migrated over to struct folio_batch * tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (380 commits) mm/hugetlb: remove hugetlb_set_page_subpool() mm: nommu: correct the range of mmap_sem_read_lock in task_mem() hugetlb: revert use of page_cache_next_miss() Revert "page cache: fix page_cache_next/prev_miss off by one" mm/vmscan: fix root proactive reclaim unthrottling unbalanced node mm: memcg: rename and document global_reclaim() mm: kill [add|del]_page_to_lru_list() mm: compaction: convert to use a folio in isolate_migratepages_block() mm: zswap: fix double invalidate with exclusive loads mm: remove unnecessary pagevec includes mm: remove references to pagevec mm: rename invalidate_mapping_pagevec to mapping_try_invalidate mm: remove struct pagevec net: convert sunrpc from pagevec to folio_batch i915: convert i915_gpu_error to use a folio_batch pagevec: rename fbatch_count() mm: remove check_move_unevictable_pages() drm: convert drm_gem_put_pages() to use a folio_batch i915: convert shmem_sg_free_table() to use a folio_batch scatterlist: add sg_set_folio() ...
629 lines
22 KiB
C
629 lines
22 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#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 void pm_prepare_console(void);
|
|
extern void pm_restore_console(void);
|
|
#else
|
|
static inline void pm_prepare_console(void)
|
|
{
|
|
}
|
|
|
|
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_TO_IDLE ((__force suspend_state_t) 1)
|
|
#define PM_SUSPEND_STANDBY ((__force suspend_state_t) 2)
|
|
#define PM_SUSPEND_MEM ((__force suspend_state_t) 3)
|
|
#define PM_SUSPEND_MIN PM_SUSPEND_TO_IDLE
|
|
#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;
|
|
u64 last_hw_sleep;
|
|
u64 total_hw_sleep;
|
|
u64 max_hw_sleep;
|
|
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)
|
|
{
|
|
strscpy(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);
|
|
};
|
|
|
|
struct platform_s2idle_ops {
|
|
int (*begin)(void);
|
|
int (*prepare)(void);
|
|
int (*prepare_late)(void);
|
|
void (*check)(void);
|
|
bool (*wake)(void);
|
|
void (*restore_early)(void);
|
|
void (*restore)(void);
|
|
void (*end)(void);
|
|
};
|
|
|
|
#ifdef CONFIG_SUSPEND
|
|
extern suspend_state_t pm_suspend_target_state;
|
|
extern suspend_state_t mem_sleep_current;
|
|
extern suspend_state_t mem_sleep_default;
|
|
|
|
/**
|
|
* 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);
|
|
|
|
extern unsigned int pm_suspend_global_flags;
|
|
|
|
#define PM_SUSPEND_FLAG_FW_SUSPEND BIT(0)
|
|
#define PM_SUSPEND_FLAG_FW_RESUME BIT(1)
|
|
#define PM_SUSPEND_FLAG_NO_PLATFORM BIT(2)
|
|
|
|
static inline void pm_suspend_clear_flags(void)
|
|
{
|
|
pm_suspend_global_flags = 0;
|
|
}
|
|
|
|
static inline void pm_set_suspend_via_firmware(void)
|
|
{
|
|
pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_SUSPEND;
|
|
}
|
|
|
|
static inline void pm_set_resume_via_firmware(void)
|
|
{
|
|
pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_RESUME;
|
|
}
|
|
|
|
static inline void pm_set_suspend_no_platform(void)
|
|
{
|
|
pm_suspend_global_flags |= PM_SUSPEND_FLAG_NO_PLATFORM;
|
|
}
|
|
|
|
/**
|
|
* pm_suspend_via_firmware - Check if platform firmware will suspend the system.
|
|
*
|
|
* To be called during system-wide power management transitions to sleep states
|
|
* or during the subsequent system-wide transitions back to the working state.
|
|
*
|
|
* Return 'true' if the platform firmware is going to be invoked at the end of
|
|
* the system-wide power management transition (to a sleep state) in progress in
|
|
* order to complete it, or if the platform firmware has been invoked in order
|
|
* to complete the last (or preceding) transition of the system to a sleep
|
|
* state.
|
|
*
|
|
* This matters if the caller needs or wants to carry out some special actions
|
|
* depending on whether or not control will be passed to the platform firmware
|
|
* subsequently (for example, the device may need to be reset before letting the
|
|
* platform firmware manipulate it, which is not necessary when the platform
|
|
* firmware is not going to be invoked) or when such special actions may have
|
|
* been carried out during the preceding transition of the system to a sleep
|
|
* state (as they may need to be taken into account).
|
|
*/
|
|
static inline bool pm_suspend_via_firmware(void)
|
|
{
|
|
return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_SUSPEND);
|
|
}
|
|
|
|
/**
|
|
* pm_resume_via_firmware - Check if platform firmware has woken up the system.
|
|
*
|
|
* To be called during system-wide power management transitions from sleep
|
|
* states.
|
|
*
|
|
* Return 'true' if the platform firmware has passed control to the kernel at
|
|
* the beginning of the system-wide power management transition in progress, so
|
|
* the event that woke up the system from sleep has been handled by the platform
|
|
* firmware.
|
|
*/
|
|
static inline bool pm_resume_via_firmware(void)
|
|
{
|
|
return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_RESUME);
|
|
}
|
|
|
|
/**
|
|
* pm_suspend_no_platform - Check if platform may change device power states.
|
|
*
|
|
* To be called during system-wide power management transitions to sleep states
|
|
* or during the subsequent system-wide transitions back to the working state.
|
|
*
|
|
* Return 'true' if the power states of devices remain under full control of the
|
|
* kernel throughout the system-wide suspend and resume cycle in progress (that
|
|
* is, if a device is put into a certain power state during suspend, it can be
|
|
* expected to remain in that state during resume).
|
|
*/
|
|
static inline bool pm_suspend_no_platform(void)
|
|
{
|
|
return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_NO_PLATFORM);
|
|
}
|
|
|
|
/* Suspend-to-idle state machnine. */
|
|
enum s2idle_states {
|
|
S2IDLE_STATE_NONE, /* Not suspended/suspending. */
|
|
S2IDLE_STATE_ENTER, /* Enter suspend-to-idle. */
|
|
S2IDLE_STATE_WAKE, /* Wake up from suspend-to-idle. */
|
|
};
|
|
|
|
extern enum s2idle_states __read_mostly s2idle_state;
|
|
|
|
static inline bool idle_should_enter_s2idle(void)
|
|
{
|
|
return unlikely(s2idle_state == S2IDLE_STATE_ENTER);
|
|
}
|
|
|
|
extern bool pm_suspend_default_s2idle(void);
|
|
extern void __init pm_states_init(void);
|
|
extern void s2idle_set_ops(const struct platform_s2idle_ops *ops);
|
|
extern void s2idle_wake(void);
|
|
|
|
/**
|
|
* 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);
|
|
extern bool sync_on_suspend_enabled;
|
|
#else /* !CONFIG_SUSPEND */
|
|
#define suspend_valid_only_mem NULL
|
|
|
|
#define pm_suspend_target_state (PM_SUSPEND_ON)
|
|
|
|
static inline void pm_suspend_clear_flags(void) {}
|
|
static inline void pm_set_suspend_via_firmware(void) {}
|
|
static inline void pm_set_resume_via_firmware(void) {}
|
|
static inline bool pm_suspend_via_firmware(void) { return false; }
|
|
static inline bool pm_resume_via_firmware(void) { return false; }
|
|
static inline bool pm_suspend_no_platform(void) { return false; }
|
|
static inline bool pm_suspend_default_s2idle(void) { return false; }
|
|
|
|
static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {}
|
|
static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; }
|
|
static inline bool sync_on_suspend_enabled(void) { return true; }
|
|
static inline bool idle_should_enter_s2idle(void) { return false; }
|
|
static inline void __init pm_states_init(void) {}
|
|
static inline void s2idle_set_ops(const struct platform_s2idle_ops *ops) {}
|
|
static inline void s2idle_wake(void) {}
|
|
#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;
|
|
};
|
|
|
|
/**
|
|
* 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)(pm_message_t stage);
|
|
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);
|
|
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 asmlinkage int swsusp_arch_suspend(void);
|
|
extern asmlinkage int swsusp_arch_resume(void);
|
|
|
|
extern u32 swsusp_hardware_signature;
|
|
extern void hibernation_set_ops(const struct platform_hibernation_ops *ops);
|
|
extern int hibernate(void);
|
|
extern bool system_entering_hibernation(void);
|
|
extern bool hibernation_available(void);
|
|
asmlinkage int swsusp_save(void);
|
|
extern struct pbe *restore_pblist;
|
|
int pfn_is_nosave(unsigned long pfn);
|
|
|
|
int hibernate_quiet_exec(int (*func)(void *data), void *data);
|
|
int hibernate_resume_nonboot_cpu_disable(void);
|
|
int arch_hibernation_header_save(void *addr, unsigned int max_size);
|
|
int arch_hibernation_header_restore(void *addr);
|
|
|
|
#else /* CONFIG_HIBERNATION */
|
|
static inline void register_nosave_region(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; }
|
|
static inline bool hibernation_available(void) { return false; }
|
|
|
|
static inline int hibernate_quiet_exec(int (*func)(void *data), void *data) {
|
|
return -ENOTSUPP;
|
|
}
|
|
#endif /* CONFIG_HIBERNATION */
|
|
|
|
int arch_resume_nosmt(void);
|
|
|
|
#ifdef CONFIG_HIBERNATION_SNAPSHOT_DEV
|
|
int is_hibernate_resume_dev(dev_t dev);
|
|
#else
|
|
static inline int is_hibernate_resume_dev(dev_t dev) { return 0; }
|
|
#endif
|
|
|
|
/* 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 */
|
|
|
|
extern struct mutex system_transition_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);
|
|
extern void ksys_sync_helper(void);
|
|
extern void pm_report_hw_sleep_time(u64 t);
|
|
extern void pm_report_max_hw_sleep(u64 t);
|
|
|
|
#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;
|
|
|
|
static inline bool pm_suspended_storage(void)
|
|
{
|
|
return !gfp_has_io_fs(gfp_allowed_mask);
|
|
}
|
|
|
|
extern bool pm_wakeup_pending(void);
|
|
extern void pm_system_wakeup(void);
|
|
extern void pm_system_cancel_wakeup(void);
|
|
extern void pm_wakeup_clear(unsigned int irq_number);
|
|
extern void pm_system_irq_wakeup(unsigned int irq_number);
|
|
extern unsigned int pm_wakeup_irq(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);
|
|
extern void pm_print_active_wakeup_sources(void);
|
|
|
|
extern unsigned int lock_system_sleep(void);
|
|
extern void unlock_system_sleep(unsigned int);
|
|
|
|
#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;
|
|
}
|
|
|
|
static inline void pm_report_hw_sleep_time(u64 t) {};
|
|
static inline void pm_report_max_hw_sleep(u64 t) {};
|
|
|
|
static inline void ksys_sync_helper(void) {}
|
|
|
|
#define pm_notifier(fn, pri) do { (void)(fn); } while (0)
|
|
|
|
static inline bool pm_suspended_storage(void) { return false; }
|
|
static inline bool pm_wakeup_pending(void) { return false; }
|
|
static inline void pm_system_wakeup(void) {}
|
|
static inline void pm_wakeup_clear(bool reset) {}
|
|
static inline void pm_system_irq_wakeup(unsigned int irq_number) {}
|
|
|
|
static inline unsigned int lock_system_sleep(void) { return 0; }
|
|
static inline void unlock_system_sleep(unsigned int flags) {}
|
|
|
|
#endif /* !CONFIG_PM_SLEEP */
|
|
|
|
#ifdef CONFIG_PM_SLEEP_DEBUG
|
|
extern bool pm_print_times_enabled;
|
|
extern bool pm_debug_messages_on;
|
|
extern bool pm_debug_messages_should_print(void);
|
|
static inline int pm_dyn_debug_messages_on(void)
|
|
{
|
|
#ifdef CONFIG_DYNAMIC_DEBUG
|
|
return 1;
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
#ifndef pr_fmt
|
|
#define pr_fmt(fmt) "PM: " fmt
|
|
#endif
|
|
#define __pm_pr_dbg(fmt, ...) \
|
|
do { \
|
|
if (pm_debug_messages_should_print()) \
|
|
printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
|
|
else if (pm_dyn_debug_messages_on()) \
|
|
pr_debug(fmt, ##__VA_ARGS__); \
|
|
} while (0)
|
|
#define __pm_deferred_pr_dbg(fmt, ...) \
|
|
do { \
|
|
if (pm_debug_messages_should_print()) \
|
|
printk_deferred(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
|
|
} while (0)
|
|
#else
|
|
#define pm_print_times_enabled (false)
|
|
#define pm_debug_messages_on (false)
|
|
|
|
#include <linux/printk.h>
|
|
|
|
#define __pm_pr_dbg(fmt, ...) \
|
|
no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
|
|
#define __pm_deferred_pr_dbg(fmt, ...) \
|
|
no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
|
|
#endif
|
|
|
|
/**
|
|
* pm_pr_dbg - print pm sleep debug messages
|
|
*
|
|
* If pm_debug_messages_on is enabled and the system is entering/leaving
|
|
* suspend, print message.
|
|
* If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is enabled,
|
|
* print message only from instances explicitly enabled on dynamic debug's
|
|
* control.
|
|
* If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is disabled,
|
|
* don't print message.
|
|
*/
|
|
#define pm_pr_dbg(fmt, ...) \
|
|
__pm_pr_dbg(fmt, ##__VA_ARGS__)
|
|
|
|
#define pm_deferred_pr_dbg(fmt, ...) \
|
|
__pm_deferred_pr_dbg(fmt, ##__VA_ARGS__)
|
|
|
|
#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 */
|
|
|
|
#endif /* _LINUX_SUSPEND_H */
|