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 | 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 | u64 last_hw_sleep; |
72 | u64 total_hw_sleep; |
73 | u64 max_hw_sleep; |
74 | enum suspend_stat_step failed_steps[REC_FAILED_NUM]; |
75 | }; |
76 | |
77 | extern struct suspend_stats suspend_stats; |
78 | |
79 | static inline void dpm_save_failed_dev(const char *name) |
80 | { |
81 | strscpy(p: suspend_stats.failed_devs[suspend_stats.last_failed_dev], |
82 | q: name, |
83 | size: sizeof(suspend_stats.failed_devs[0])); |
84 | suspend_stats.last_failed_dev++; |
85 | suspend_stats.last_failed_dev %= REC_FAILED_NUM; |
86 | } |
87 | |
88 | static inline void dpm_save_failed_errno(int err) |
89 | { |
90 | suspend_stats.errno[suspend_stats.last_failed_errno] = err; |
91 | suspend_stats.last_failed_errno++; |
92 | suspend_stats.last_failed_errno %= REC_FAILED_NUM; |
93 | } |
94 | |
95 | static inline void dpm_save_failed_step(enum suspend_stat_step step) |
96 | { |
97 | suspend_stats.failed_steps[suspend_stats.last_failed_step] = step; |
98 | suspend_stats.last_failed_step++; |
99 | suspend_stats.last_failed_step %= REC_FAILED_NUM; |
100 | } |
101 | |
102 | /** |
103 | * struct platform_suspend_ops - Callbacks for managing platform dependent |
104 | * system sleep states. |
105 | * |
106 | * @valid: Callback to determine if given system sleep state is supported by |
107 | * the platform. |
108 | * Valid (ie. supported) states are advertised in /sys/power/state. Note |
109 | * that it still may be impossible to enter given system sleep state if the |
110 | * conditions aren't right. |
111 | * There is the %suspend_valid_only_mem function available that can be |
112 | * assigned to this if the platform only supports mem sleep. |
113 | * |
114 | * @begin: Initialise a transition to given system sleep state. |
115 | * @begin() is executed right prior to suspending devices. The information |
116 | * conveyed to the platform code by @begin() should be disregarded by it as |
117 | * soon as @end() is executed. If @begin() fails (ie. returns nonzero), |
118 | * @prepare(), @enter() and @finish() will not be called by the PM core. |
119 | * This callback is optional. However, if it is implemented, the argument |
120 | * passed to @enter() is redundant and should be ignored. |
121 | * |
122 | * @prepare: Prepare the platform for entering the system sleep state indicated |
123 | * by @begin(). |
124 | * @prepare() is called right after devices have been suspended (ie. the |
125 | * appropriate .suspend() method has been executed for each device) and |
126 | * before device drivers' late suspend callbacks are executed. It returns |
127 | * 0 on success or a negative error code otherwise, in which case the |
128 | * system cannot enter the desired sleep state (@prepare_late(), @enter(), |
129 | * and @wake() will not be called in that case). |
130 | * |
131 | * @prepare_late: Finish preparing the platform for entering the system sleep |
132 | * state indicated by @begin(). |
133 | * @prepare_late is called before disabling nonboot CPUs and after |
134 | * device drivers' late suspend callbacks have been executed. It returns |
135 | * 0 on success or a negative error code otherwise, in which case the |
136 | * system cannot enter the desired sleep state (@enter() will not be |
137 | * executed). |
138 | * |
139 | * @enter: Enter the system sleep state indicated by @begin() or represented by |
140 | * the argument if @begin() is not implemented. |
141 | * This callback is mandatory. It returns 0 on success or a negative |
142 | * error code otherwise, in which case the system cannot enter the desired |
143 | * sleep state. |
144 | * |
145 | * @wake: Called when the system has just left a sleep state, right after |
146 | * the nonboot CPUs have been enabled and before device drivers' early |
147 | * resume callbacks are executed. |
148 | * This callback is optional, but should be implemented by the platforms |
149 | * that implement @prepare_late(). If implemented, it is always called |
150 | * after @prepare_late and @enter(), even if one of them fails. |
151 | * |
152 | * @finish: Finish wake-up of the platform. |
153 | * @finish is called right prior to calling device drivers' regular suspend |
154 | * callbacks. |
155 | * This callback is optional, but should be implemented by the platforms |
156 | * that implement @prepare(). If implemented, it is always called after |
157 | * @enter() and @wake(), even if any of them fails. It is executed after |
158 | * a failing @prepare. |
159 | * |
160 | * @suspend_again: Returns whether the system should suspend again (true) or |
161 | * not (false). If the platform wants to poll sensors or execute some |
162 | * code during suspended without invoking userspace and most of devices, |
163 | * suspend_again callback is the place assuming that periodic-wakeup or |
164 | * alarm-wakeup is already setup. This allows to execute some codes while |
165 | * being kept suspended in the view of userland and devices. |
166 | * |
167 | * @end: Called by the PM core right after resuming devices, to indicate to |
168 | * the platform that the system has returned to the working state or |
169 | * the transition to the sleep state has been aborted. |
170 | * This callback is optional, but should be implemented by the platforms |
171 | * that implement @begin(). Accordingly, platforms implementing @begin() |
172 | * should also provide a @end() which cleans up transitions aborted before |
173 | * @enter(). |
174 | * |
175 | * @recover: Recover the platform from a suspend failure. |
176 | * Called by the PM core if the suspending of devices fails. |
177 | * This callback is optional and should only be implemented by platforms |
178 | * which require special recovery actions in that situation. |
179 | */ |
180 | struct platform_suspend_ops { |
181 | int (*valid)(suspend_state_t state); |
182 | int (*begin)(suspend_state_t state); |
183 | int (*prepare)(void); |
184 | int (*prepare_late)(void); |
185 | int (*enter)(suspend_state_t state); |
186 | void (*wake)(void); |
187 | void (*finish)(void); |
188 | bool (*suspend_again)(void); |
189 | void (*end)(void); |
190 | void (*recover)(void); |
191 | }; |
192 | |
193 | struct platform_s2idle_ops { |
194 | int (*begin)(void); |
195 | int (*prepare)(void); |
196 | int (*prepare_late)(void); |
197 | void (*check)(void); |
198 | bool (*wake)(void); |
199 | void (*restore_early)(void); |
200 | void (*restore)(void); |
201 | void (*end)(void); |
202 | }; |
203 | |
204 | #ifdef CONFIG_SUSPEND |
205 | extern suspend_state_t pm_suspend_target_state; |
206 | extern suspend_state_t mem_sleep_current; |
207 | extern suspend_state_t mem_sleep_default; |
208 | |
209 | /** |
210 | * suspend_set_ops - set platform dependent suspend operations |
211 | * @ops: The new suspend operations to set. |
212 | */ |
213 | extern void suspend_set_ops(const struct platform_suspend_ops *ops); |
214 | extern int suspend_valid_only_mem(suspend_state_t state); |
215 | |
216 | extern unsigned int pm_suspend_global_flags; |
217 | |
218 | #define PM_SUSPEND_FLAG_FW_SUSPEND BIT(0) |
219 | #define PM_SUSPEND_FLAG_FW_RESUME BIT(1) |
220 | #define PM_SUSPEND_FLAG_NO_PLATFORM BIT(2) |
221 | |
222 | static inline void pm_suspend_clear_flags(void) |
223 | { |
224 | pm_suspend_global_flags = 0; |
225 | } |
226 | |
227 | static inline void pm_set_suspend_via_firmware(void) |
228 | { |
229 | pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_SUSPEND; |
230 | } |
231 | |
232 | static inline void pm_set_resume_via_firmware(void) |
233 | { |
234 | pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_RESUME; |
235 | } |
236 | |
237 | static inline void pm_set_suspend_no_platform(void) |
238 | { |
239 | pm_suspend_global_flags |= PM_SUSPEND_FLAG_NO_PLATFORM; |
240 | } |
241 | |
242 | /** |
243 | * pm_suspend_via_firmware - Check if platform firmware will suspend the system. |
244 | * |
245 | * To be called during system-wide power management transitions to sleep states |
246 | * or during the subsequent system-wide transitions back to the working state. |
247 | * |
248 | * Return 'true' if the platform firmware is going to be invoked at the end of |
249 | * the system-wide power management transition (to a sleep state) in progress in |
250 | * order to complete it, or if the platform firmware has been invoked in order |
251 | * to complete the last (or preceding) transition of the system to a sleep |
252 | * state. |
253 | * |
254 | * This matters if the caller needs or wants to carry out some special actions |
255 | * depending on whether or not control will be passed to the platform firmware |
256 | * subsequently (for example, the device may need to be reset before letting the |
257 | * platform firmware manipulate it, which is not necessary when the platform |
258 | * firmware is not going to be invoked) or when such special actions may have |
259 | * been carried out during the preceding transition of the system to a sleep |
260 | * state (as they may need to be taken into account). |
261 | */ |
262 | static inline bool pm_suspend_via_firmware(void) |
263 | { |
264 | return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_SUSPEND); |
265 | } |
266 | |
267 | /** |
268 | * pm_resume_via_firmware - Check if platform firmware has woken up the system. |
269 | * |
270 | * To be called during system-wide power management transitions from sleep |
271 | * states. |
272 | * |
273 | * Return 'true' if the platform firmware has passed control to the kernel at |
274 | * the beginning of the system-wide power management transition in progress, so |
275 | * the event that woke up the system from sleep has been handled by the platform |
276 | * firmware. |
277 | */ |
278 | static inline bool pm_resume_via_firmware(void) |
279 | { |
280 | return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_RESUME); |
281 | } |
282 | |
283 | /** |
284 | * pm_suspend_no_platform - Check if platform may change device power states. |
285 | * |
286 | * To be called during system-wide power management transitions to sleep states |
287 | * or during the subsequent system-wide transitions back to the working state. |
288 | * |
289 | * Return 'true' if the power states of devices remain under full control of the |
290 | * kernel throughout the system-wide suspend and resume cycle in progress (that |
291 | * is, if a device is put into a certain power state during suspend, it can be |
292 | * expected to remain in that state during resume). |
293 | */ |
294 | static inline bool pm_suspend_no_platform(void) |
295 | { |
296 | return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_NO_PLATFORM); |
297 | } |
298 | |
299 | /* Suspend-to-idle state machnine. */ |
300 | enum s2idle_states { |
301 | S2IDLE_STATE_NONE, /* Not suspended/suspending. */ |
302 | S2IDLE_STATE_ENTER, /* Enter suspend-to-idle. */ |
303 | S2IDLE_STATE_WAKE, /* Wake up from suspend-to-idle. */ |
304 | }; |
305 | |
306 | extern enum s2idle_states __read_mostly s2idle_state; |
307 | |
308 | static inline bool idle_should_enter_s2idle(void) |
309 | { |
310 | return unlikely(s2idle_state == S2IDLE_STATE_ENTER); |
311 | } |
312 | |
313 | extern bool pm_suspend_default_s2idle(void); |
314 | extern void __init pm_states_init(void); |
315 | extern void s2idle_set_ops(const struct platform_s2idle_ops *ops); |
316 | extern void s2idle_wake(void); |
317 | |
318 | /** |
319 | * arch_suspend_disable_irqs - disable IRQs for suspend |
320 | * |
321 | * Disables IRQs (in the default case). This is a weak symbol in the common |
322 | * code and thus allows architectures to override it if more needs to be |
323 | * done. Not called for suspend to disk. |
324 | */ |
325 | extern void arch_suspend_disable_irqs(void); |
326 | |
327 | /** |
328 | * arch_suspend_enable_irqs - enable IRQs after suspend |
329 | * |
330 | * Enables IRQs (in the default case). This is a weak symbol in the common |
331 | * code and thus allows architectures to override it if more needs to be |
332 | * done. Not called for suspend to disk. |
333 | */ |
334 | extern void arch_suspend_enable_irqs(void); |
335 | |
336 | extern int pm_suspend(suspend_state_t state); |
337 | extern bool sync_on_suspend_enabled; |
338 | #else /* !CONFIG_SUSPEND */ |
339 | #define suspend_valid_only_mem NULL |
340 | |
341 | #define pm_suspend_target_state (PM_SUSPEND_ON) |
342 | |
343 | static inline void pm_suspend_clear_flags(void) {} |
344 | static inline void pm_set_suspend_via_firmware(void) {} |
345 | static inline void pm_set_resume_via_firmware(void) {} |
346 | static inline bool pm_suspend_via_firmware(void) { return false; } |
347 | static inline bool pm_resume_via_firmware(void) { return false; } |
348 | static inline bool pm_suspend_no_platform(void) { return false; } |
349 | static inline bool pm_suspend_default_s2idle(void) { return false; } |
350 | |
351 | static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {} |
352 | static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; } |
353 | static inline bool sync_on_suspend_enabled(void) { return true; } |
354 | static inline bool idle_should_enter_s2idle(void) { return false; } |
355 | static inline void __init pm_states_init(void) {} |
356 | static inline void s2idle_set_ops(const struct platform_s2idle_ops *ops) {} |
357 | static inline void s2idle_wake(void) {} |
358 | #endif /* !CONFIG_SUSPEND */ |
359 | |
360 | /* struct pbe is used for creating lists of pages that should be restored |
361 | * atomically during the resume from disk, because the page frames they have |
362 | * occupied before the suspend are in use. |
363 | */ |
364 | struct pbe { |
365 | void *address; /* address of the copy */ |
366 | void *orig_address; /* original address of a page */ |
367 | struct pbe *next; |
368 | }; |
369 | |
370 | /** |
371 | * struct platform_hibernation_ops - hibernation platform support |
372 | * |
373 | * The methods in this structure allow a platform to carry out special |
374 | * operations required by it during a hibernation transition. |
375 | * |
376 | * All the methods below, except for @recover(), must be implemented. |
377 | * |
378 | * @begin: Tell the platform driver that we're starting hibernation. |
379 | * Called right after shrinking memory and before freezing devices. |
380 | * |
381 | * @end: Called by the PM core right after resuming devices, to indicate to |
382 | * the platform that the system has returned to the working state. |
383 | * |
384 | * @pre_snapshot: Prepare the platform for creating the hibernation image. |
385 | * Called right after devices have been frozen and before the nonboot |
386 | * CPUs are disabled (runs with IRQs on). |
387 | * |
388 | * @finish: Restore the previous state of the platform after the hibernation |
389 | * image has been created *or* put the platform into the normal operation |
390 | * mode after the hibernation (the same method is executed in both cases). |
391 | * Called right after the nonboot CPUs have been enabled and before |
392 | * thawing devices (runs with IRQs on). |
393 | * |
394 | * @prepare: Prepare the platform for entering the low power state. |
395 | * Called right after the hibernation image has been saved and before |
396 | * devices are prepared for entering the low power state. |
397 | * |
398 | * @enter: Put the system into the low power state after the hibernation image |
399 | * has been saved to disk. |
400 | * Called after the nonboot CPUs have been disabled and all of the low |
401 | * level devices have been shut down (runs with IRQs off). |
402 | * |
403 | * @leave: Perform the first stage of the cleanup after the system sleep state |
404 | * indicated by @set_target() has been left. |
405 | * Called right after the control has been passed from the boot kernel to |
406 | * the image kernel, before the nonboot CPUs are enabled and before devices |
407 | * are resumed. Executed with interrupts disabled. |
408 | * |
409 | * @pre_restore: Prepare system for the restoration from a hibernation image. |
410 | * Called right after devices have been frozen and before the nonboot |
411 | * CPUs are disabled (runs with IRQs on). |
412 | * |
413 | * @restore_cleanup: Clean up after a failing image restoration. |
414 | * Called right after the nonboot CPUs have been enabled and before |
415 | * thawing devices (runs with IRQs on). |
416 | * |
417 | * @recover: Recover the platform from a failure to suspend devices. |
418 | * Called by the PM core if the suspending of devices during hibernation |
419 | * fails. This callback is optional and should only be implemented by |
420 | * platforms which require special recovery actions in that situation. |
421 | */ |
422 | struct platform_hibernation_ops { |
423 | int (*begin)(pm_message_t stage); |
424 | void (*end)(void); |
425 | int (*pre_snapshot)(void); |
426 | void (*finish)(void); |
427 | int (*prepare)(void); |
428 | int (*enter)(void); |
429 | void (*leave)(void); |
430 | int (*pre_restore)(void); |
431 | void (*restore_cleanup)(void); |
432 | void (*recover)(void); |
433 | }; |
434 | |
435 | #ifdef CONFIG_HIBERNATION |
436 | /* kernel/power/snapshot.c */ |
437 | extern void register_nosave_region(unsigned long b, unsigned long e); |
438 | extern int swsusp_page_is_forbidden(struct page *); |
439 | extern void swsusp_set_page_free(struct page *); |
440 | extern void swsusp_unset_page_free(struct page *); |
441 | extern unsigned long get_safe_page(gfp_t gfp_mask); |
442 | extern asmlinkage int swsusp_arch_suspend(void); |
443 | extern asmlinkage int swsusp_arch_resume(void); |
444 | |
445 | extern u32 swsusp_hardware_signature; |
446 | extern void hibernation_set_ops(const struct platform_hibernation_ops *ops); |
447 | extern int hibernate(void); |
448 | extern bool system_entering_hibernation(void); |
449 | extern bool hibernation_available(void); |
450 | asmlinkage int swsusp_save(void); |
451 | extern struct pbe *restore_pblist; |
452 | int pfn_is_nosave(unsigned long pfn); |
453 | |
454 | int hibernate_quiet_exec(int (*func)(void *data), void *data); |
455 | int hibernate_resume_nonboot_cpu_disable(void); |
456 | int (void *addr, unsigned int max_size); |
457 | int (void *addr); |
458 | |
459 | #else /* CONFIG_HIBERNATION */ |
460 | static inline void register_nosave_region(unsigned long b, unsigned long e) {} |
461 | static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } |
462 | static inline void swsusp_set_page_free(struct page *p) {} |
463 | static inline void swsusp_unset_page_free(struct page *p) {} |
464 | |
465 | static inline void hibernation_set_ops(const struct platform_hibernation_ops *ops) {} |
466 | static inline int hibernate(void) { return -ENOSYS; } |
467 | static inline bool system_entering_hibernation(void) { return false; } |
468 | static inline bool hibernation_available(void) { return false; } |
469 | |
470 | static inline int hibernate_quiet_exec(int (*func)(void *data), void *data) { |
471 | return -ENOTSUPP; |
472 | } |
473 | #endif /* CONFIG_HIBERNATION */ |
474 | |
475 | int arch_resume_nosmt(void); |
476 | |
477 | #ifdef CONFIG_HIBERNATION_SNAPSHOT_DEV |
478 | int is_hibernate_resume_dev(dev_t dev); |
479 | #else |
480 | static inline int is_hibernate_resume_dev(dev_t dev) { return 0; } |
481 | #endif |
482 | |
483 | /* Hibernation and suspend events */ |
484 | #define PM_HIBERNATION_PREPARE 0x0001 /* Going to hibernate */ |
485 | #define PM_POST_HIBERNATION 0x0002 /* Hibernation finished */ |
486 | #define PM_SUSPEND_PREPARE 0x0003 /* Going to suspend the system */ |
487 | #define PM_POST_SUSPEND 0x0004 /* Suspend finished */ |
488 | #define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */ |
489 | #define PM_POST_RESTORE 0x0006 /* Restore failed */ |
490 | |
491 | extern struct mutex system_transition_mutex; |
492 | |
493 | #ifdef CONFIG_PM_SLEEP |
494 | void save_processor_state(void); |
495 | void restore_processor_state(void); |
496 | |
497 | /* kernel/power/main.c */ |
498 | extern int register_pm_notifier(struct notifier_block *nb); |
499 | extern int unregister_pm_notifier(struct notifier_block *nb); |
500 | extern void ksys_sync_helper(void); |
501 | extern void pm_report_hw_sleep_time(u64 t); |
502 | extern void pm_report_max_hw_sleep(u64 t); |
503 | |
504 | #define pm_notifier(fn, pri) { \ |
505 | static struct notifier_block fn##_nb = \ |
506 | { .notifier_call = fn, .priority = pri }; \ |
507 | register_pm_notifier(&fn##_nb); \ |
508 | } |
509 | |
510 | /* drivers/base/power/wakeup.c */ |
511 | extern bool events_check_enabled; |
512 | |
513 | static inline bool pm_suspended_storage(void) |
514 | { |
515 | return !gfp_has_io_fs(gfp: gfp_allowed_mask); |
516 | } |
517 | |
518 | extern bool pm_wakeup_pending(void); |
519 | extern void pm_system_wakeup(void); |
520 | extern void pm_system_cancel_wakeup(void); |
521 | extern void pm_wakeup_clear(unsigned int irq_number); |
522 | extern void pm_system_irq_wakeup(unsigned int irq_number); |
523 | extern unsigned int pm_wakeup_irq(void); |
524 | extern bool pm_get_wakeup_count(unsigned int *count, bool block); |
525 | extern bool pm_save_wakeup_count(unsigned int count); |
526 | extern void pm_wakep_autosleep_enabled(bool set); |
527 | extern void pm_print_active_wakeup_sources(void); |
528 | |
529 | extern unsigned int lock_system_sleep(void); |
530 | extern void unlock_system_sleep(unsigned int); |
531 | |
532 | #else /* !CONFIG_PM_SLEEP */ |
533 | |
534 | static inline int register_pm_notifier(struct notifier_block *nb) |
535 | { |
536 | return 0; |
537 | } |
538 | |
539 | static inline int unregister_pm_notifier(struct notifier_block *nb) |
540 | { |
541 | return 0; |
542 | } |
543 | |
544 | static inline void pm_report_hw_sleep_time(u64 t) {}; |
545 | static inline void pm_report_max_hw_sleep(u64 t) {}; |
546 | |
547 | static inline void ksys_sync_helper(void) {} |
548 | |
549 | #define pm_notifier(fn, pri) do { (void)(fn); } while (0) |
550 | |
551 | static inline bool pm_suspended_storage(void) { return false; } |
552 | static inline bool pm_wakeup_pending(void) { return false; } |
553 | static inline void pm_system_wakeup(void) {} |
554 | static inline void pm_wakeup_clear(bool reset) {} |
555 | static inline void pm_system_irq_wakeup(unsigned int irq_number) {} |
556 | |
557 | static inline unsigned int lock_system_sleep(void) { return 0; } |
558 | static inline void unlock_system_sleep(unsigned int flags) {} |
559 | |
560 | #endif /* !CONFIG_PM_SLEEP */ |
561 | |
562 | #ifdef CONFIG_PM_SLEEP_DEBUG |
563 | extern bool pm_print_times_enabled; |
564 | extern bool pm_debug_messages_on; |
565 | extern bool pm_debug_messages_should_print(void); |
566 | static inline int pm_dyn_debug_messages_on(void) |
567 | { |
568 | #ifdef CONFIG_DYNAMIC_DEBUG |
569 | return 1; |
570 | #else |
571 | return 0; |
572 | #endif |
573 | } |
574 | #ifndef pr_fmt |
575 | #define pr_fmt(fmt) "PM: " fmt |
576 | #endif |
577 | #define __pm_pr_dbg(fmt, ...) \ |
578 | do { \ |
579 | if (pm_debug_messages_should_print()) \ |
580 | printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ |
581 | else if (pm_dyn_debug_messages_on()) \ |
582 | pr_debug(fmt, ##__VA_ARGS__); \ |
583 | } while (0) |
584 | #define __pm_deferred_pr_dbg(fmt, ...) \ |
585 | do { \ |
586 | if (pm_debug_messages_should_print()) \ |
587 | printk_deferred(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ |
588 | } while (0) |
589 | #else |
590 | #define pm_print_times_enabled (false) |
591 | #define pm_debug_messages_on (false) |
592 | |
593 | #include <linux/printk.h> |
594 | |
595 | #define __pm_pr_dbg(fmt, ...) \ |
596 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
597 | #define __pm_deferred_pr_dbg(fmt, ...) \ |
598 | no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) |
599 | #endif |
600 | |
601 | /** |
602 | * pm_pr_dbg - print pm sleep debug messages |
603 | * |
604 | * If pm_debug_messages_on is enabled and the system is entering/leaving |
605 | * suspend, print message. |
606 | * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is enabled, |
607 | * print message only from instances explicitly enabled on dynamic debug's |
608 | * control. |
609 | * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is disabled, |
610 | * don't print message. |
611 | */ |
612 | #define pm_pr_dbg(fmt, ...) \ |
613 | __pm_pr_dbg(fmt, ##__VA_ARGS__) |
614 | |
615 | #define pm_deferred_pr_dbg(fmt, ...) \ |
616 | __pm_deferred_pr_dbg(fmt, ##__VA_ARGS__) |
617 | |
618 | #ifdef CONFIG_PM_AUTOSLEEP |
619 | |
620 | /* kernel/power/autosleep.c */ |
621 | void queue_up_suspend_work(void); |
622 | |
623 | #else /* !CONFIG_PM_AUTOSLEEP */ |
624 | |
625 | static inline void queue_up_suspend_work(void) {} |
626 | |
627 | #endif /* !CONFIG_PM_AUTOSLEEP */ |
628 | |
629 | #endif /* _LINUX_SUSPEND_H */ |
630 | |