1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_SUSPEND_H
3 #define _LINUX_SUSPEND_H
4
5 #include <linux/swap.h>
6 #include <linux/notifier.h>
7 #include <linux/init.h>
8 #include <linux/pm.h>
9 #include <linux/mm.h>
10 #include <linux/freezer.h>
11 #include <asm/errno.h>
12
13 #ifdef CONFIG_VT
14 extern void pm_set_vt_switch(int);
15 #else
pm_set_vt_switch(int do_switch)16 static inline void pm_set_vt_switch(int do_switch)
17 {
18 }
19 #endif
20
21 #ifdef CONFIG_VT_CONSOLE_SLEEP
22 extern void pm_prepare_console(void);
23 extern void pm_restore_console(void);
24 #else
pm_prepare_console(void)25 static inline void pm_prepare_console(void)
26 {
27 }
28
pm_restore_console(void)29 static inline void pm_restore_console(void)
30 {
31 }
32 #endif
33
34 typedef int __bitwise suspend_state_t;
35
36 #define PM_SUSPEND_ON ((__force suspend_state_t) 0)
37 #define PM_SUSPEND_TO_IDLE ((__force suspend_state_t) 1)
38 #define PM_SUSPEND_STANDBY ((__force suspend_state_t) 2)
39 #define PM_SUSPEND_MEM ((__force suspend_state_t) 3)
40 #define PM_SUSPEND_MIN PM_SUSPEND_TO_IDLE
41 #define PM_SUSPEND_MAX ((__force suspend_state_t) 4)
42
43 enum suspend_stat_step {
44 SUSPEND_FREEZE = 1,
45 SUSPEND_PREPARE,
46 SUSPEND_SUSPEND,
47 SUSPEND_SUSPEND_LATE,
48 SUSPEND_SUSPEND_NOIRQ,
49 SUSPEND_RESUME_NOIRQ,
50 SUSPEND_RESUME_EARLY,
51 SUSPEND_RESUME
52 };
53
54 struct suspend_stats {
55 int success;
56 int fail;
57 int failed_freeze;
58 int failed_prepare;
59 int failed_suspend;
60 int failed_suspend_late;
61 int failed_suspend_noirq;
62 int failed_resume;
63 int failed_resume_early;
64 int failed_resume_noirq;
65 #define REC_FAILED_NUM 2
66 int last_failed_dev;
67 char failed_devs[REC_FAILED_NUM][40];
68 int last_failed_errno;
69 int errno[REC_FAILED_NUM];
70 int last_failed_step;
71 enum suspend_stat_step failed_steps[REC_FAILED_NUM];
72 };
73
74 extern struct suspend_stats suspend_stats;
75
dpm_save_failed_dev(const char * name)76 static inline void dpm_save_failed_dev(const char *name)
77 {
78 strscpy(suspend_stats.failed_devs[suspend_stats.last_failed_dev],
79 name,
80 sizeof(suspend_stats.failed_devs[0]));
81 suspend_stats.last_failed_dev++;
82 suspend_stats.last_failed_dev %= REC_FAILED_NUM;
83 }
84
dpm_save_failed_errno(int err)85 static inline void dpm_save_failed_errno(int err)
86 {
87 suspend_stats.errno[suspend_stats.last_failed_errno] = err;
88 suspend_stats.last_failed_errno++;
89 suspend_stats.last_failed_errno %= REC_FAILED_NUM;
90 }
91
dpm_save_failed_step(enum suspend_stat_step step)92 static inline void dpm_save_failed_step(enum suspend_stat_step step)
93 {
94 suspend_stats.failed_steps[suspend_stats.last_failed_step] = step;
95 suspend_stats.last_failed_step++;
96 suspend_stats.last_failed_step %= REC_FAILED_NUM;
97 }
98
99 /**
100 * struct platform_suspend_ops - Callbacks for managing platform dependent
101 * system sleep states.
102 *
103 * @valid: Callback to determine if given system sleep state is supported by
104 * the platform.
105 * Valid (ie. supported) states are advertised in /sys/power/state. Note
106 * that it still may be impossible to enter given system sleep state if the
107 * conditions aren't right.
108 * There is the %suspend_valid_only_mem function available that can be
109 * assigned to this if the platform only supports mem sleep.
110 *
111 * @begin: Initialise a transition to given system sleep state.
112 * @begin() is executed right prior to suspending devices. The information
113 * conveyed to the platform code by @begin() should be disregarded by it as
114 * soon as @end() is executed. If @begin() fails (ie. returns nonzero),
115 * @prepare(), @enter() and @finish() will not be called by the PM core.
116 * This callback is optional. However, if it is implemented, the argument
117 * passed to @enter() is redundant and should be ignored.
118 *
119 * @prepare: Prepare the platform for entering the system sleep state indicated
120 * by @begin().
121 * @prepare() is called right after devices have been suspended (ie. the
122 * appropriate .suspend() method has been executed for each device) and
123 * before device drivers' late suspend callbacks are executed. It returns
124 * 0 on success or a negative error code otherwise, in which case the
125 * system cannot enter the desired sleep state (@prepare_late(), @enter(),
126 * and @wake() will not be called in that case).
127 *
128 * @prepare_late: Finish preparing the platform for entering the system sleep
129 * state indicated by @begin().
130 * @prepare_late is called before disabling nonboot CPUs and after
131 * device drivers' late suspend callbacks have been executed. It returns
132 * 0 on success or a negative error code otherwise, in which case the
133 * system cannot enter the desired sleep state (@enter() will not be
134 * executed).
135 *
136 * @enter: Enter the system sleep state indicated by @begin() or represented by
137 * the argument if @begin() is not implemented.
138 * This callback is mandatory. It returns 0 on success or a negative
139 * error code otherwise, in which case the system cannot enter the desired
140 * sleep state.
141 *
142 * @wake: Called when the system has just left a sleep state, right after
143 * the nonboot CPUs have been enabled and before device drivers' early
144 * resume callbacks are executed.
145 * This callback is optional, but should be implemented by the platforms
146 * that implement @prepare_late(). If implemented, it is always called
147 * after @prepare_late and @enter(), even if one of them fails.
148 *
149 * @finish: Finish wake-up of the platform.
150 * @finish is called right prior to calling device drivers' regular suspend
151 * callbacks.
152 * This callback is optional, but should be implemented by the platforms
153 * that implement @prepare(). If implemented, it is always called after
154 * @enter() and @wake(), even if any of them fails. It is executed after
155 * a failing @prepare.
156 *
157 * @suspend_again: Returns whether the system should suspend again (true) or
158 * not (false). If the platform wants to poll sensors or execute some
159 * code during suspended without invoking userspace and most of devices,
160 * suspend_again callback is the place assuming that periodic-wakeup or
161 * alarm-wakeup is already setup. This allows to execute some codes while
162 * being kept suspended in the view of userland and devices.
163 *
164 * @end: Called by the PM core right after resuming devices, to indicate to
165 * the platform that the system has returned to the working state or
166 * the transition to the sleep state has been aborted.
167 * This callback is optional, but should be implemented by the platforms
168 * that implement @begin(). Accordingly, platforms implementing @begin()
169 * should also provide a @end() which cleans up transitions aborted before
170 * @enter().
171 *
172 * @recover: Recover the platform from a suspend failure.
173 * Called by the PM core if the suspending of devices fails.
174 * This callback is optional and should only be implemented by platforms
175 * which require special recovery actions in that situation.
176 */
177 struct platform_suspend_ops {
178 int (*valid)(suspend_state_t state);
179 int (*begin)(suspend_state_t state);
180 int (*prepare)(void);
181 int (*prepare_late)(void);
182 int (*enter)(suspend_state_t state);
183 void (*wake)(void);
184 void (*finish)(void);
185 bool (*suspend_again)(void);
186 void (*end)(void);
187 void (*recover)(void);
188 };
189
190 struct platform_s2idle_ops {
191 int (*begin)(void);
192 int (*prepare)(void);
193 int (*prepare_late)(void);
194 void (*check)(void);
195 bool (*wake)(void);
196 void (*restore_early)(void);
197 void (*restore)(void);
198 void (*end)(void);
199 };
200
201 #ifdef CONFIG_SUSPEND
202 extern suspend_state_t mem_sleep_current;
203 extern suspend_state_t mem_sleep_default;
204
205 /**
206 * suspend_set_ops - set platform dependent suspend operations
207 * @ops: The new suspend operations to set.
208 */
209 extern void suspend_set_ops(const struct platform_suspend_ops *ops);
210 extern int suspend_valid_only_mem(suspend_state_t state);
211
212 extern unsigned int pm_suspend_global_flags;
213
214 #define PM_SUSPEND_FLAG_FW_SUSPEND BIT(0)
215 #define PM_SUSPEND_FLAG_FW_RESUME BIT(1)
216 #define PM_SUSPEND_FLAG_NO_PLATFORM BIT(2)
217
pm_suspend_clear_flags(void)218 static inline void pm_suspend_clear_flags(void)
219 {
220 pm_suspend_global_flags = 0;
221 }
222
pm_set_suspend_via_firmware(void)223 static inline void pm_set_suspend_via_firmware(void)
224 {
225 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_SUSPEND;
226 }
227
pm_set_resume_via_firmware(void)228 static inline void pm_set_resume_via_firmware(void)
229 {
230 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_RESUME;
231 }
232
pm_set_suspend_no_platform(void)233 static inline void pm_set_suspend_no_platform(void)
234 {
235 pm_suspend_global_flags |= PM_SUSPEND_FLAG_NO_PLATFORM;
236 }
237
238 /**
239 * pm_suspend_via_firmware - Check if platform firmware will suspend the system.
240 *
241 * To be called during system-wide power management transitions to sleep states
242 * or during the subsequent system-wide transitions back to the working state.
243 *
244 * Return 'true' if the platform firmware is going to be invoked at the end of
245 * the system-wide power management transition (to a sleep state) in progress in
246 * order to complete it, or if the platform firmware has been invoked in order
247 * to complete the last (or preceding) transition of the system to a sleep
248 * state.
249 *
250 * This matters if the caller needs or wants to carry out some special actions
251 * depending on whether or not control will be passed to the platform firmware
252 * subsequently (for example, the device may need to be reset before letting the
253 * platform firmware manipulate it, which is not necessary when the platform
254 * firmware is not going to be invoked) or when such special actions may have
255 * been carried out during the preceding transition of the system to a sleep
256 * state (as they may need to be taken into account).
257 */
pm_suspend_via_firmware(void)258 static inline bool pm_suspend_via_firmware(void)
259 {
260 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_SUSPEND);
261 }
262
263 /**
264 * pm_resume_via_firmware - Check if platform firmware has woken up the system.
265 *
266 * To be called during system-wide power management transitions from sleep
267 * states.
268 *
269 * Return 'true' if the platform firmware has passed control to the kernel at
270 * the beginning of the system-wide power management transition in progress, so
271 * the event that woke up the system from sleep has been handled by the platform
272 * firmware.
273 */
pm_resume_via_firmware(void)274 static inline bool pm_resume_via_firmware(void)
275 {
276 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_RESUME);
277 }
278
279 /**
280 * pm_suspend_no_platform - Check if platform may change device power states.
281 *
282 * To be called during system-wide power management transitions to sleep states
283 * or during the subsequent system-wide transitions back to the working state.
284 *
285 * Return 'true' if the power states of devices remain under full control of the
286 * kernel throughout the system-wide suspend and resume cycle in progress (that
287 * is, if a device is put into a certain power state during suspend, it can be
288 * expected to remain in that state during resume).
289 */
pm_suspend_no_platform(void)290 static inline bool pm_suspend_no_platform(void)
291 {
292 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_NO_PLATFORM);
293 }
294
295 /* Suspend-to-idle state machnine. */
296 enum s2idle_states {
297 S2IDLE_STATE_NONE, /* Not suspended/suspending. */
298 S2IDLE_STATE_ENTER, /* Enter suspend-to-idle. */
299 S2IDLE_STATE_WAKE, /* Wake up from suspend-to-idle. */
300 };
301
302 extern enum s2idle_states __read_mostly s2idle_state;
303
idle_should_enter_s2idle(void)304 static inline bool idle_should_enter_s2idle(void)
305 {
306 return unlikely(s2idle_state == S2IDLE_STATE_ENTER);
307 }
308
309 extern bool pm_suspend_default_s2idle(void);
310 extern void __init pm_states_init(void);
311 extern void s2idle_set_ops(const struct platform_s2idle_ops *ops);
312 extern void s2idle_wake(void);
313
314 /**
315 * arch_suspend_disable_irqs - disable IRQs for suspend
316 *
317 * Disables IRQs (in the default case). This is a weak symbol in the common
318 * code and thus allows architectures to override it if more needs to be
319 * done. Not called for suspend to disk.
320 */
321 extern void arch_suspend_disable_irqs(void);
322
323 /**
324 * arch_suspend_enable_irqs - enable IRQs after suspend
325 *
326 * Enables IRQs (in the default case). This is a weak symbol in the common
327 * code and thus allows architectures to override it if more needs to be
328 * done. Not called for suspend to disk.
329 */
330 extern void arch_suspend_enable_irqs(void);
331
332 extern int pm_suspend(suspend_state_t state);
333 extern bool sync_on_suspend_enabled;
334 #else /* !CONFIG_SUSPEND */
335 #define suspend_valid_only_mem NULL
336
pm_suspend_clear_flags(void)337 static inline void pm_suspend_clear_flags(void) {}
pm_set_suspend_via_firmware(void)338 static inline void pm_set_suspend_via_firmware(void) {}
pm_set_resume_via_firmware(void)339 static inline void pm_set_resume_via_firmware(void) {}
pm_suspend_via_firmware(void)340 static inline bool pm_suspend_via_firmware(void) { return false; }
pm_resume_via_firmware(void)341 static inline bool pm_resume_via_firmware(void) { return false; }
pm_suspend_no_platform(void)342 static inline bool pm_suspend_no_platform(void) { return false; }
pm_suspend_default_s2idle(void)343 static inline bool pm_suspend_default_s2idle(void) { return false; }
344
suspend_set_ops(const struct platform_suspend_ops * ops)345 static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {}
pm_suspend(suspend_state_t state)346 static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; }
sync_on_suspend_enabled(void)347 static inline bool sync_on_suspend_enabled(void) { return true; }
idle_should_enter_s2idle(void)348 static inline bool idle_should_enter_s2idle(void) { return false; }
pm_states_init(void)349 static inline void __init pm_states_init(void) {}
s2idle_set_ops(const struct platform_s2idle_ops * ops)350 static inline void s2idle_set_ops(const struct platform_s2idle_ops *ops) {}
s2idle_wake(void)351 static inline void s2idle_wake(void) {}
352 #endif /* !CONFIG_SUSPEND */
353
354 /* struct pbe is used for creating lists of pages that should be restored
355 * atomically during the resume from disk, because the page frames they have
356 * occupied before the suspend are in use.
357 */
358 struct pbe {
359 void *address; /* address of the copy */
360 void *orig_address; /* original address of a page */
361 struct pbe *next;
362 };
363
364 /* mm/page_alloc.c */
365 extern void mark_free_pages(struct zone *zone);
366
367 /**
368 * struct platform_hibernation_ops - hibernation platform support
369 *
370 * The methods in this structure allow a platform to carry out special
371 * operations required by it during a hibernation transition.
372 *
373 * All the methods below, except for @recover(), must be implemented.
374 *
375 * @begin: Tell the platform driver that we're starting hibernation.
376 * Called right after shrinking memory and before freezing devices.
377 *
378 * @end: Called by the PM core right after resuming devices, to indicate to
379 * the platform that the system has returned to the working state.
380 *
381 * @pre_snapshot: Prepare the platform for creating the hibernation image.
382 * Called right after devices have been frozen and before the nonboot
383 * CPUs are disabled (runs with IRQs on).
384 *
385 * @finish: Restore the previous state of the platform after the hibernation
386 * image has been created *or* put the platform into the normal operation
387 * mode after the hibernation (the same method is executed in both cases).
388 * Called right after the nonboot CPUs have been enabled and before
389 * thawing devices (runs with IRQs on).
390 *
391 * @prepare: Prepare the platform for entering the low power state.
392 * Called right after the hibernation image has been saved and before
393 * devices are prepared for entering the low power state.
394 *
395 * @enter: Put the system into the low power state after the hibernation image
396 * has been saved to disk.
397 * Called after the nonboot CPUs have been disabled and all of the low
398 * level devices have been shut down (runs with IRQs off).
399 *
400 * @leave: Perform the first stage of the cleanup after the system sleep state
401 * indicated by @set_target() has been left.
402 * Called right after the control has been passed from the boot kernel to
403 * the image kernel, before the nonboot CPUs are enabled and before devices
404 * are resumed. Executed with interrupts disabled.
405 *
406 * @pre_restore: Prepare system for the restoration from a hibernation image.
407 * Called right after devices have been frozen and before the nonboot
408 * CPUs are disabled (runs with IRQs on).
409 *
410 * @restore_cleanup: Clean up after a failing image restoration.
411 * Called right after the nonboot CPUs have been enabled and before
412 * thawing devices (runs with IRQs on).
413 *
414 * @recover: Recover the platform from a failure to suspend devices.
415 * Called by the PM core if the suspending of devices during hibernation
416 * fails. This callback is optional and should only be implemented by
417 * platforms which require special recovery actions in that situation.
418 */
419 struct platform_hibernation_ops {
420 int (*begin)(pm_message_t stage);
421 void (*end)(void);
422 int (*pre_snapshot)(void);
423 void (*finish)(void);
424 int (*prepare)(void);
425 int (*enter)(void);
426 void (*leave)(void);
427 int (*pre_restore)(void);
428 void (*restore_cleanup)(void);
429 void (*recover)(void);
430 };
431
432 #ifdef CONFIG_HIBERNATION
433 /* kernel/power/snapshot.c */
434 extern void register_nosave_region(unsigned long b, unsigned long e);
435 extern int swsusp_page_is_forbidden(struct page *);
436 extern void swsusp_set_page_free(struct page *);
437 extern void swsusp_unset_page_free(struct page *);
438 extern unsigned long get_safe_page(gfp_t gfp_mask);
439 extern asmlinkage int swsusp_arch_suspend(void);
440 extern asmlinkage int swsusp_arch_resume(void);
441
442 extern u32 swsusp_hardware_signature;
443 extern void hibernation_set_ops(const struct platform_hibernation_ops *ops);
444 extern int hibernate(void);
445 extern bool system_entering_hibernation(void);
446 extern bool hibernation_available(void);
447 asmlinkage int swsusp_save(void);
448 extern struct pbe *restore_pblist;
449 int pfn_is_nosave(unsigned long pfn);
450
451 int hibernate_quiet_exec(int (*func)(void *data), void *data);
452 #else /* CONFIG_HIBERNATION */
register_nosave_region(unsigned long b,unsigned long e)453 static inline void register_nosave_region(unsigned long b, unsigned long e) {}
swsusp_page_is_forbidden(struct page * p)454 static inline int swsusp_page_is_forbidden(struct page *p) { return 0; }
swsusp_set_page_free(struct page * p)455 static inline void swsusp_set_page_free(struct page *p) {}
swsusp_unset_page_free(struct page * p)456 static inline void swsusp_unset_page_free(struct page *p) {}
457
hibernation_set_ops(const struct platform_hibernation_ops * ops)458 static inline void hibernation_set_ops(const struct platform_hibernation_ops *ops) {}
hibernate(void)459 static inline int hibernate(void) { return -ENOSYS; }
system_entering_hibernation(void)460 static inline bool system_entering_hibernation(void) { return false; }
hibernation_available(void)461 static inline bool hibernation_available(void) { return false; }
462
hibernate_quiet_exec(int (* func)(void * data),void * data)463 static inline int hibernate_quiet_exec(int (*func)(void *data), void *data) {
464 return -ENOTSUPP;
465 }
466 #endif /* CONFIG_HIBERNATION */
467
468 #ifdef CONFIG_HIBERNATION_SNAPSHOT_DEV
469 int is_hibernate_resume_dev(dev_t dev);
470 #else
is_hibernate_resume_dev(dev_t dev)471 static inline int is_hibernate_resume_dev(dev_t dev) { return 0; }
472 #endif
473
474 /* Hibernation and suspend events */
475 #define PM_HIBERNATION_PREPARE 0x0001 /* Going to hibernate */
476 #define PM_POST_HIBERNATION 0x0002 /* Hibernation finished */
477 #define PM_SUSPEND_PREPARE 0x0003 /* Going to suspend the system */
478 #define PM_POST_SUSPEND 0x0004 /* Suspend finished */
479 #define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */
480 #define PM_POST_RESTORE 0x0006 /* Restore failed */
481
482 extern struct mutex system_transition_mutex;
483
484 #ifdef CONFIG_PM_SLEEP
485 void save_processor_state(void);
486 void restore_processor_state(void);
487
488 /* kernel/power/main.c */
489 extern int register_pm_notifier(struct notifier_block *nb);
490 extern int unregister_pm_notifier(struct notifier_block *nb);
491 extern void ksys_sync_helper(void);
492
493 #define pm_notifier(fn, pri) { \
494 static struct notifier_block fn##_nb = \
495 { .notifier_call = fn, .priority = pri }; \
496 register_pm_notifier(&fn##_nb); \
497 }
498
499 /* drivers/base/power/wakeup.c */
500 extern bool events_check_enabled;
501 extern suspend_state_t pm_suspend_target_state;
502
503 extern bool pm_wakeup_pending(void);
504 extern void pm_system_wakeup(void);
505 extern void pm_system_cancel_wakeup(void);
506 extern void pm_wakeup_clear(unsigned int irq_number);
507 extern void pm_system_irq_wakeup(unsigned int irq_number);
508 extern unsigned int pm_wakeup_irq(void);
509 extern bool pm_get_wakeup_count(unsigned int *count, bool block);
510 extern bool pm_save_wakeup_count(unsigned int count);
511 extern void pm_wakep_autosleep_enabled(bool set);
512 extern void pm_print_active_wakeup_sources(void);
513
514 extern unsigned int lock_system_sleep(void);
515 extern void unlock_system_sleep(unsigned int);
516
517 #else /* !CONFIG_PM_SLEEP */
518
register_pm_notifier(struct notifier_block * nb)519 static inline int register_pm_notifier(struct notifier_block *nb)
520 {
521 return 0;
522 }
523
unregister_pm_notifier(struct notifier_block * nb)524 static inline int unregister_pm_notifier(struct notifier_block *nb)
525 {
526 return 0;
527 }
528
ksys_sync_helper(void)529 static inline void ksys_sync_helper(void) {}
530
531 #define pm_notifier(fn, pri) do { (void)(fn); } while (0)
532
pm_wakeup_pending(void)533 static inline bool pm_wakeup_pending(void) { return false; }
pm_system_wakeup(void)534 static inline void pm_system_wakeup(void) {}
pm_wakeup_clear(bool reset)535 static inline void pm_wakeup_clear(bool reset) {}
pm_system_irq_wakeup(unsigned int irq_number)536 static inline void pm_system_irq_wakeup(unsigned int irq_number) {}
537
lock_system_sleep(void)538 static inline unsigned int lock_system_sleep(void) { return 0; }
unlock_system_sleep(unsigned int flags)539 static inline void unlock_system_sleep(unsigned int flags) {}
540
541 #endif /* !CONFIG_PM_SLEEP */
542
543 #ifdef CONFIG_PM_SLEEP_DEBUG
544 extern bool pm_print_times_enabled;
545 extern bool pm_debug_messages_on;
pm_dyn_debug_messages_on(void)546 static inline int pm_dyn_debug_messages_on(void)
547 {
548 #ifdef CONFIG_DYNAMIC_DEBUG
549 return 1;
550 #else
551 return 0;
552 #endif
553 }
554 #ifndef pr_fmt
555 #define pr_fmt(fmt) "PM: " fmt
556 #endif
557 #define __pm_pr_dbg(fmt, ...) \
558 do { \
559 if (pm_debug_messages_on) \
560 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
561 else if (pm_dyn_debug_messages_on()) \
562 pr_debug(fmt, ##__VA_ARGS__); \
563 } while (0)
564 #define __pm_deferred_pr_dbg(fmt, ...) \
565 do { \
566 if (pm_debug_messages_on) \
567 printk_deferred(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
568 } while (0)
569 #else
570 #define pm_print_times_enabled (false)
571 #define pm_debug_messages_on (false)
572
573 #include <linux/printk.h>
574
575 #define __pm_pr_dbg(fmt, ...) \
576 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
577 #define __pm_deferred_pr_dbg(fmt, ...) \
578 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
579 #endif
580
581 /**
582 * pm_pr_dbg - print pm sleep debug messages
583 *
584 * If pm_debug_messages_on is enabled, print message.
585 * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is enabled,
586 * print message only from instances explicitly enabled on dynamic debug's
587 * control.
588 * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is disabled,
589 * don't print message.
590 */
591 #define pm_pr_dbg(fmt, ...) \
592 __pm_pr_dbg(fmt, ##__VA_ARGS__)
593
594 #define pm_deferred_pr_dbg(fmt, ...) \
595 __pm_deferred_pr_dbg(fmt, ##__VA_ARGS__)
596
597 #ifdef CONFIG_PM_AUTOSLEEP
598
599 /* kernel/power/autosleep.c */
600 void queue_up_suspend_work(void);
601
602 #else /* !CONFIG_PM_AUTOSLEEP */
603
queue_up_suspend_work(void)604 static inline void queue_up_suspend_work(void) {}
605
606 #endif /* !CONFIG_PM_AUTOSLEEP */
607
608 #endif /* _LINUX_SUSPEND_H */
609