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 |
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 |
25 | static inline void pm_prepare_console(void) |
26 | { |
27 | } |
28 | |
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 | /** |
44 | * struct platform_suspend_ops - Callbacks for managing platform dependent |
45 | * system sleep states. |
46 | * |
47 | * @valid: Callback to determine if given system sleep state is supported by |
48 | * the platform. |
49 | * Valid (ie. supported) states are advertised in /sys/power/state. Note |
50 | * that it still may be impossible to enter given system sleep state if the |
51 | * conditions aren't right. |
52 | * There is the %suspend_valid_only_mem function available that can be |
53 | * assigned to this if the platform only supports mem sleep. |
54 | * |
55 | * @begin: Initialise a transition to given system sleep state. |
56 | * @begin() is executed right prior to suspending devices. The information |
57 | * conveyed to the platform code by @begin() should be disregarded by it as |
58 | * soon as @end() is executed. If @begin() fails (ie. returns nonzero), |
59 | * @prepare(), @enter() and @finish() will not be called by the PM core. |
60 | * This callback is optional. However, if it is implemented, the argument |
61 | * passed to @enter() is redundant and should be ignored. |
62 | * |
63 | * @prepare: Prepare the platform for entering the system sleep state indicated |
64 | * by @begin(). |
65 | * @prepare() is called right after devices have been suspended (ie. the |
66 | * appropriate .suspend() method has been executed for each device) and |
67 | * before device drivers' late suspend callbacks are executed. It returns |
68 | * 0 on success or a negative error code otherwise, in which case the |
69 | * system cannot enter the desired sleep state (@prepare_late(), @enter(), |
70 | * and @wake() will not be called in that case). |
71 | * |
72 | * @prepare_late: Finish preparing the platform for entering the system sleep |
73 | * state indicated by @begin(). |
74 | * @prepare_late is called before disabling nonboot CPUs and after |
75 | * device drivers' late suspend callbacks have been executed. It returns |
76 | * 0 on success or a negative error code otherwise, in which case the |
77 | * system cannot enter the desired sleep state (@enter() will not be |
78 | * executed). |
79 | * |
80 | * @enter: Enter the system sleep state indicated by @begin() or represented by |
81 | * the argument if @begin() is not implemented. |
82 | * This callback is mandatory. It returns 0 on success or a negative |
83 | * error code otherwise, in which case the system cannot enter the desired |
84 | * sleep state. |
85 | * |
86 | * @wake: Called when the system has just left a sleep state, right after |
87 | * the nonboot CPUs have been enabled and before device drivers' early |
88 | * resume callbacks are executed. |
89 | * This callback is optional, but should be implemented by the platforms |
90 | * that implement @prepare_late(). If implemented, it is always called |
91 | * after @prepare_late and @enter(), even if one of them fails. |
92 | * |
93 | * @finish: Finish wake-up of the platform. |
94 | * @finish is called right prior to calling device drivers' regular suspend |
95 | * callbacks. |
96 | * This callback is optional, but should be implemented by the platforms |
97 | * that implement @prepare(). If implemented, it is always called after |
98 | * @enter() and @wake(), even if any of them fails. It is executed after |
99 | * a failing @prepare. |
100 | * |
101 | * @suspend_again: Returns whether the system should suspend again (true) or |
102 | * not (false). If the platform wants to poll sensors or execute some |
103 | * code during suspended without invoking userspace and most of devices, |
104 | * suspend_again callback is the place assuming that periodic-wakeup or |
105 | * alarm-wakeup is already setup. This allows to execute some codes while |
106 | * being kept suspended in the view of userland and devices. |
107 | * |
108 | * @end: Called by the PM core right after resuming devices, to indicate to |
109 | * the platform that the system has returned to the working state or |
110 | * the transition to the sleep state has been aborted. |
111 | * This callback is optional, but should be implemented by the platforms |
112 | * that implement @begin(). Accordingly, platforms implementing @begin() |
113 | * should also provide a @end() which cleans up transitions aborted before |
114 | * @enter(). |
115 | * |
116 | * @recover: Recover the platform from a suspend failure. |
117 | * Called by the PM core if the suspending of devices fails. |
118 | * This callback is optional and should only be implemented by platforms |
119 | * which require special recovery actions in that situation. |
120 | */ |
121 | struct platform_suspend_ops { |
122 | int (*valid)(suspend_state_t state); |
123 | int (*begin)(suspend_state_t state); |
124 | int (*prepare)(void); |
125 | int (*prepare_late)(void); |
126 | int (*enter)(suspend_state_t state); |
127 | void (*wake)(void); |
128 | void (*finish)(void); |
129 | bool (*suspend_again)(void); |
130 | void (*end)(void); |
131 | void (*recover)(void); |
132 | }; |
133 | |
134 | struct platform_s2idle_ops { |
135 | int (*begin)(void); |
136 | int (*prepare)(void); |
137 | int (*prepare_late)(void); |
138 | void (*check)(void); |
139 | bool (*wake)(void); |
140 | void (*restore_early)(void); |
141 | void (*restore)(void); |
142 | void (*end)(void); |
143 | }; |
144 | |
145 | #ifdef CONFIG_SUSPEND |
146 | extern suspend_state_t pm_suspend_target_state; |
147 | extern suspend_state_t mem_sleep_current; |
148 | extern suspend_state_t mem_sleep_default; |
149 | |
150 | /** |
151 | * suspend_set_ops - set platform dependent suspend operations |
152 | * @ops: The new suspend operations to set. |
153 | */ |
154 | extern void suspend_set_ops(const struct platform_suspend_ops *ops); |
155 | extern int suspend_valid_only_mem(suspend_state_t state); |
156 | |
157 | extern unsigned int pm_suspend_global_flags; |
158 | |
159 | #define PM_SUSPEND_FLAG_FW_SUSPEND BIT(0) |
160 | #define PM_SUSPEND_FLAG_FW_RESUME BIT(1) |
161 | #define PM_SUSPEND_FLAG_NO_PLATFORM BIT(2) |
162 | |
163 | static inline void pm_suspend_clear_flags(void) |
164 | { |
165 | pm_suspend_global_flags = 0; |
166 | } |
167 | |
168 | static inline void pm_set_suspend_via_firmware(void) |
169 | { |
170 | pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_SUSPEND; |
171 | } |
172 | |
173 | static inline void pm_set_resume_via_firmware(void) |
174 | { |
175 | pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_RESUME; |
176 | } |
177 | |
178 | static inline void pm_set_suspend_no_platform(void) |
179 | { |
180 | pm_suspend_global_flags |= PM_SUSPEND_FLAG_NO_PLATFORM; |
181 | } |
182 | |
183 | /** |
184 | * pm_suspend_via_firmware - Check if platform firmware will suspend the system. |
185 | * |
186 | * To be called during system-wide power management transitions to sleep states |
187 | * or during the subsequent system-wide transitions back to the working state. |
188 | * |
189 | * Return 'true' if the platform firmware is going to be invoked at the end of |
190 | * the system-wide power management transition (to a sleep state) in progress in |
191 | * order to complete it, or if the platform firmware has been invoked in order |
192 | * to complete the last (or preceding) transition of the system to a sleep |
193 | * state. |
194 | * |
195 | * This matters if the caller needs or wants to carry out some special actions |
196 | * depending on whether or not control will be passed to the platform firmware |
197 | * subsequently (for example, the device may need to be reset before letting the |
198 | * platform firmware manipulate it, which is not necessary when the platform |
199 | * firmware is not going to be invoked) or when such special actions may have |
200 | * been carried out during the preceding transition of the system to a sleep |
201 | * state (as they may need to be taken into account). |
202 | */ |
203 | static inline bool pm_suspend_via_firmware(void) |
204 | { |
205 | return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_SUSPEND); |
206 | } |
207 | |
208 | /** |
209 | * pm_resume_via_firmware - Check if platform firmware has woken up the system. |
210 | * |
211 | * To be called during system-wide power management transitions from sleep |
212 | * states. |
213 | * |
214 | * Return 'true' if the platform firmware has passed control to the kernel at |
215 | * the beginning of the system-wide power management transition in progress, so |
216 | * the event that woke up the system from sleep has been handled by the platform |
217 | * firmware. |
218 | */ |
219 | static inline bool pm_resume_via_firmware(void) |
220 | { |
221 | return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_RESUME); |
222 | } |
223 | |
224 | /** |
225 | * pm_suspend_no_platform - Check if platform may change device power states. |
226 | * |
227 | * To be called during system-wide power management transitions to sleep states |
228 | * or during the subsequent system-wide transitions back to the working state. |
229 | * |
230 | * Return 'true' if the power states of devices remain under full control of the |
231 | * kernel throughout the system-wide suspend and resume cycle in progress (that |
232 | * is, if a device is put into a certain power state during suspend, it can be |
233 | * expected to remain in that state during resume). |
234 | */ |
235 | static inline bool pm_suspend_no_platform(void) |
236 | { |
237 | return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_NO_PLATFORM); |
238 | } |
239 | |
240 | /* Suspend-to-idle state machnine. */ |
241 | enum s2idle_states { |
242 | S2IDLE_STATE_NONE, /* Not suspended/suspending. */ |
243 | S2IDLE_STATE_ENTER, /* Enter suspend-to-idle. */ |
244 | S2IDLE_STATE_WAKE, /* Wake up from suspend-to-idle. */ |
245 | }; |
246 | |
247 | extern enum s2idle_states __read_mostly s2idle_state; |
248 | |
249 | static inline bool idle_should_enter_s2idle(void) |
250 | { |
251 | return unlikely(s2idle_state == S2IDLE_STATE_ENTER); |
252 | } |
253 | |
254 | extern bool pm_suspend_default_s2idle(void); |
255 | extern void __init pm_states_init(void); |
256 | extern void s2idle_set_ops(const struct platform_s2idle_ops *ops); |
257 | extern void s2idle_wake(void); |
258 | |
259 | /** |
260 | * arch_suspend_disable_irqs - disable IRQs for suspend |
261 | * |
262 | * Disables IRQs (in the default case). This is a weak symbol in the common |
263 | * code and thus allows architectures to override it if more needs to be |
264 | * done. Not called for suspend to disk. |
265 | */ |
266 | extern void arch_suspend_disable_irqs(void); |
267 | |
268 | /** |
269 | * arch_suspend_enable_irqs - enable IRQs after suspend |
270 | * |
271 | * Enables IRQs (in the default case). This is a weak symbol in the common |
272 | * code and thus allows architectures to override it if more needs to be |
273 | * done. Not called for suspend to disk. |
274 | */ |
275 | extern void arch_suspend_enable_irqs(void); |
276 | |
277 | extern int pm_suspend(suspend_state_t state); |
278 | extern bool sync_on_suspend_enabled; |
279 | #else /* !CONFIG_SUSPEND */ |
280 | #define suspend_valid_only_mem NULL |
281 | |
282 | #define pm_suspend_target_state (PM_SUSPEND_ON) |
283 | |
284 | static inline void pm_suspend_clear_flags(void) {} |
285 | static inline void pm_set_suspend_via_firmware(void) {} |
286 | static inline void pm_set_resume_via_firmware(void) {} |
287 | static inline bool pm_suspend_via_firmware(void) { return false; } |
288 | static inline bool pm_resume_via_firmware(void) { return false; } |
289 | static inline bool pm_suspend_no_platform(void) { return false; } |
290 | static inline bool pm_suspend_default_s2idle(void) { return false; } |
291 | |
292 | static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {} |
293 | static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; } |
294 | static inline bool sync_on_suspend_enabled(void) { return true; } |
295 | static inline bool idle_should_enter_s2idle(void) { return false; } |
296 | static inline void __init pm_states_init(void) {} |
297 | static inline void s2idle_set_ops(const struct platform_s2idle_ops *ops) {} |
298 | static inline void s2idle_wake(void) {} |
299 | #endif /* !CONFIG_SUSPEND */ |
300 | |
301 | /* struct pbe is used for creating lists of pages that should be restored |
302 | * atomically during the resume from disk, because the page frames they have |
303 | * occupied before the suspend are in use. |
304 | */ |
305 | struct pbe { |
306 | void *address; /* address of the copy */ |
307 | void *orig_address; /* original address of a page */ |
308 | struct pbe *next; |
309 | }; |
310 | |
311 | /** |
312 | * struct platform_hibernation_ops - hibernation platform support |
313 | * |
314 | * The methods in this structure allow a platform to carry out special |
315 | * operations required by it during a hibernation transition. |
316 | * |
317 | * All the methods below, except for @recover(), must be implemented. |
318 | * |
319 | * @begin: Tell the platform driver that we're starting hibernation. |
320 | * Called right after shrinking memory and before freezing devices. |
321 | * |
322 | * @end: Called by the PM core right after resuming devices, to indicate to |
323 | * the platform that the system has returned to the working state. |
324 | * |
325 | * @pre_snapshot: Prepare the platform for creating the hibernation image. |
326 | * Called right after devices have been frozen and before the nonboot |
327 | * CPUs are disabled (runs with IRQs on). |
328 | * |
329 | * @finish: Restore the previous state of the platform after the hibernation |
330 | * image has been created *or* put the platform into the normal operation |
331 | * mode after the hibernation (the same method is executed in both cases). |
332 | * Called right after the nonboot CPUs have been enabled and before |
333 | * thawing devices (runs with IRQs on). |
334 | * |
335 | * @prepare: Prepare the platform for entering the low power state. |
336 | * Called right after the hibernation image has been saved and before |
337 | * devices are prepared for entering the low power state. |
338 | * |
339 | * @enter: Put the system into the low power state after the hibernation image |
340 | * has been saved to disk. |
341 | * Called after the nonboot CPUs have been disabled and all of the low |
342 | * level devices have been shut down (runs with IRQs off). |
343 | * |
344 | * @leave: Perform the first stage of the cleanup after the system sleep state |
345 | * indicated by @set_target() has been left. |
346 | * Called right after the control has been passed from the boot kernel to |
347 | * the image kernel, before the nonboot CPUs are enabled and before devices |
348 | * are resumed. Executed with interrupts disabled. |
349 | * |
350 | * @pre_restore: Prepare system for the restoration from a hibernation image. |
351 | * Called right after devices have been frozen and before the nonboot |
352 | * CPUs are disabled (runs with IRQs on). |
353 | * |
354 | * @restore_cleanup: Clean up after a failing image restoration. |
355 | * Called right after the nonboot CPUs have been enabled and before |
356 | * thawing devices (runs with IRQs on). |
357 | * |
358 | * @recover: Recover the platform from a failure to suspend devices. |
359 | * Called by the PM core if the suspending of devices during hibernation |
360 | * fails. This callback is optional and should only be implemented by |
361 | * platforms which require special recovery actions in that situation. |
362 | */ |
363 | struct platform_hibernation_ops { |
364 | int (*begin)(pm_message_t stage); |
365 | void (*end)(void); |
366 | int (*pre_snapshot)(void); |
367 | void (*finish)(void); |
368 | int (*prepare)(void); |
369 | int (*enter)(void); |
370 | void (*leave)(void); |
371 | int (*pre_restore)(void); |
372 | void (*restore_cleanup)(void); |
373 | void (*recover)(void); |
374 | }; |
375 | |
376 | #ifdef CONFIG_HIBERNATION |
377 | /* kernel/power/snapshot.c */ |
378 | extern void register_nosave_region(unsigned long b, unsigned long e); |
379 | extern int swsusp_page_is_forbidden(struct page *); |
380 | extern void swsusp_set_page_free(struct page *); |
381 | extern void swsusp_unset_page_free(struct page *); |
382 | extern unsigned long get_safe_page(gfp_t gfp_mask); |
383 | extern asmlinkage int swsusp_arch_suspend(void); |
384 | extern asmlinkage int swsusp_arch_resume(void); |
385 | |
386 | extern u32 swsusp_hardware_signature; |
387 | extern void hibernation_set_ops(const struct platform_hibernation_ops *ops); |
388 | extern int hibernate(void); |
389 | extern bool system_entering_hibernation(void); |
390 | extern bool hibernation_available(void); |
391 | asmlinkage int swsusp_save(void); |
392 | extern struct pbe *restore_pblist; |
393 | int pfn_is_nosave(unsigned long pfn); |
394 | |
395 | int hibernate_quiet_exec(int (*func)(void *data), void *data); |
396 | int hibernate_resume_nonboot_cpu_disable(void); |
397 | int (void *addr, unsigned int max_size); |
398 | int (void *addr); |
399 | |
400 | #else /* CONFIG_HIBERNATION */ |
401 | static inline void register_nosave_region(unsigned long b, unsigned long e) {} |
402 | static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } |
403 | static inline void swsusp_set_page_free(struct page *p) {} |
404 | static inline void swsusp_unset_page_free(struct page *p) {} |
405 | |
406 | static inline void hibernation_set_ops(const struct platform_hibernation_ops *ops) {} |
407 | static inline int hibernate(void) { return -ENOSYS; } |
408 | static inline bool system_entering_hibernation(void) { return false; } |
409 | static inline bool hibernation_available(void) { return false; } |
410 | |
411 | static inline int hibernate_quiet_exec(int (*func)(void *data), void *data) { |
412 | return -ENOTSUPP; |
413 | } |
414 | #endif /* CONFIG_HIBERNATION */ |
415 | |
416 | int arch_resume_nosmt(void); |
417 | |
418 | #ifdef CONFIG_HIBERNATION_SNAPSHOT_DEV |
419 | int is_hibernate_resume_dev(dev_t dev); |
420 | #else |
421 | static inline int is_hibernate_resume_dev(dev_t dev) { return 0; } |
422 | #endif |
423 | |
424 | /* Hibernation and suspend events */ |
425 | #define PM_HIBERNATION_PREPARE 0x0001 /* Going to hibernate */ |
426 | #define PM_POST_HIBERNATION 0x0002 /* Hibernation finished */ |
427 | #define PM_SUSPEND_PREPARE 0x0003 /* Going to suspend the system */ |
428 | #define PM_POST_SUSPEND 0x0004 /* Suspend finished */ |
429 | #define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */ |
430 | #define PM_POST_RESTORE 0x0006 /* Restore failed */ |
431 | |
432 | extern struct mutex system_transition_mutex; |
433 | |
434 | #ifdef CONFIG_PM_SLEEP |
435 | void save_processor_state(void); |
436 | void restore_processor_state(void); |
437 | |
438 | /* kernel/power/main.c */ |
439 | extern int register_pm_notifier(struct notifier_block *nb); |
440 | extern int unregister_pm_notifier(struct notifier_block *nb); |
441 | extern void ksys_sync_helper(void); |
442 | extern void pm_report_hw_sleep_time(u64 t); |
443 | extern void pm_report_max_hw_sleep(u64 t); |
444 | |
445 | #define pm_notifier(fn, pri) { \ |
446 | static struct notifier_block fn##_nb = \ |
447 | { .notifier_call = fn, .priority = pri }; \ |
448 | register_pm_notifier(&fn##_nb); \ |
449 | } |
450 | |
451 | /* drivers/base/power/wakeup.c */ |
452 | extern bool events_check_enabled; |
453 | |
454 | static inline bool pm_suspended_storage(void) |
455 | { |
456 | return !gfp_has_io_fs(gfp: gfp_allowed_mask); |
457 | } |
458 | |
459 | extern bool pm_wakeup_pending(void); |
460 | extern void pm_system_wakeup(void); |
461 | extern void pm_system_cancel_wakeup(void); |
462 | extern void pm_wakeup_clear(unsigned int irq_number); |
463 | extern void pm_system_irq_wakeup(unsigned int irq_number); |
464 | extern unsigned int pm_wakeup_irq(void); |
465 | extern bool pm_get_wakeup_count(unsigned int *count, bool block); |
466 | extern bool pm_save_wakeup_count(unsigned int count); |
467 | extern void pm_wakep_autosleep_enabled(bool set); |
468 | extern void pm_print_active_wakeup_sources(void); |
469 | |
470 | extern unsigned int lock_system_sleep(void); |
471 | extern void unlock_system_sleep(unsigned int); |
472 | |
473 | #else /* !CONFIG_PM_SLEEP */ |
474 | |
475 | static inline int register_pm_notifier(struct notifier_block *nb) |
476 | { |
477 | return 0; |
478 | } |
479 | |
480 | static inline int unregister_pm_notifier(struct notifier_block *nb) |
481 | { |
482 | return 0; |
483 | } |
484 | |
485 | static inline void pm_report_hw_sleep_time(u64 t) {}; |
486 | static inline void pm_report_max_hw_sleep(u64 t) {}; |
487 | |
488 | static inline void ksys_sync_helper(void) {} |
489 | |
490 | #define pm_notifier(fn, pri) do { (void)(fn); } while (0) |
491 | |
492 | static inline bool pm_suspended_storage(void) { return false; } |
493 | static inline bool pm_wakeup_pending(void) { return false; } |
494 | static inline void pm_system_wakeup(void) {} |
495 | static inline void pm_wakeup_clear(bool reset) {} |
496 | static inline void pm_system_irq_wakeup(unsigned int irq_number) {} |
497 | |
498 | static inline unsigned int lock_system_sleep(void) { return 0; } |
499 | static inline void unlock_system_sleep(unsigned int flags) {} |
500 | |
501 | #endif /* !CONFIG_PM_SLEEP */ |
502 | |
503 | #ifdef CONFIG_PM_SLEEP_DEBUG |
504 | extern bool pm_print_times_enabled; |
505 | extern bool pm_debug_messages_on; |
506 | extern bool pm_debug_messages_should_print(void); |
507 | static inline int pm_dyn_debug_messages_on(void) |
508 | { |
509 | #ifdef CONFIG_DYNAMIC_DEBUG |
510 | return 1; |
511 | #else |
512 | return 0; |
513 | #endif |
514 | } |
515 | #ifndef pr_fmt |
516 | #define pr_fmt(fmt) "PM: " fmt |
517 | #endif |
518 | #define __pm_pr_dbg(fmt, ...) \ |
519 | do { \ |
520 | if (pm_debug_messages_should_print()) \ |
521 | printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ |
522 | else if (pm_dyn_debug_messages_on()) \ |
523 | pr_debug(fmt, ##__VA_ARGS__); \ |
524 | } while (0) |
525 | #define __pm_deferred_pr_dbg(fmt, ...) \ |
526 | do { \ |
527 | if (pm_debug_messages_should_print()) \ |
528 | printk_deferred(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ |
529 | } while (0) |
530 | #else |
531 | #define pm_print_times_enabled (false) |
532 | #define pm_debug_messages_on (false) |
533 | |
534 | #include <linux/printk.h> |
535 | |
536 | #define __pm_pr_dbg(fmt, ...) \ |
537 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
538 | #define __pm_deferred_pr_dbg(fmt, ...) \ |
539 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
540 | #endif |
541 | |
542 | /** |
543 | * pm_pr_dbg - print pm sleep debug messages |
544 | * |
545 | * If pm_debug_messages_on is enabled and the system is entering/leaving |
546 | * suspend, print message. |
547 | * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is enabled, |
548 | * print message only from instances explicitly enabled on dynamic debug's |
549 | * control. |
550 | * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is disabled, |
551 | * don't print message. |
552 | */ |
553 | #define pm_pr_dbg(fmt, ...) \ |
554 | __pm_pr_dbg(fmt, ##__VA_ARGS__) |
555 | |
556 | #define pm_deferred_pr_dbg(fmt, ...) \ |
557 | __pm_deferred_pr_dbg(fmt, ##__VA_ARGS__) |
558 | |
559 | #ifdef CONFIG_PM_AUTOSLEEP |
560 | |
561 | /* kernel/power/autosleep.c */ |
562 | void queue_up_suspend_work(void); |
563 | |
564 | #else /* !CONFIG_PM_AUTOSLEEP */ |
565 | |
566 | static inline void queue_up_suspend_work(void) {} |
567 | |
568 | #endif /* !CONFIG_PM_AUTOSLEEP */ |
569 | |
570 | enum suspend_stat_step { |
571 | SUSPEND_WORKING = 0, |
572 | SUSPEND_FREEZE, |
573 | SUSPEND_PREPARE, |
574 | SUSPEND_SUSPEND, |
575 | SUSPEND_SUSPEND_LATE, |
576 | SUSPEND_SUSPEND_NOIRQ, |
577 | SUSPEND_RESUME_NOIRQ, |
578 | SUSPEND_RESUME_EARLY, |
579 | SUSPEND_RESUME |
580 | }; |
581 | |
582 | void dpm_save_failed_dev(const char *name); |
583 | void dpm_save_failed_step(enum suspend_stat_step step); |
584 | |
585 | #endif /* _LINUX_SUSPEND_H */ |
586 | |