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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
95d9ffbe RW |
2 | #ifndef _LINUX_SUSPEND_H |
3 | #define _LINUX_SUSPEND_H | |
1da177e4 | 4 | |
1da177e4 LT |
5 | #include <linux/swap.h> |
6 | #include <linux/notifier.h> | |
1da177e4 LT |
7 | #include <linux/init.h> |
8 | #include <linux/pm.h> | |
7be98234 | 9 | #include <linux/mm.h> |
33e638b9 | 10 | #include <linux/freezer.h> |
95d9ffbe RW |
11 | #include <asm/errno.h> |
12 | ||
37cce26b | 13 | #ifdef CONFIG_VT |
b6f448e9 | 14 | extern void pm_set_vt_switch(int); |
95d9ffbe | 15 | #else |
b6f448e9 AS |
16 | static inline void pm_set_vt_switch(int do_switch) |
17 | { | |
18 | } | |
37cce26b | 19 | #endif |
b6f448e9 | 20 | |
37cce26b | 21 | #ifdef CONFIG_VT_CONSOLE_SLEEP |
ca5f2b4c | 22 | extern void pm_prepare_console(void); |
37cce26b HS |
23 | extern void pm_restore_console(void); |
24 | #else | |
ca5f2b4c | 25 | static inline void pm_prepare_console(void) |
b6f448e9 | 26 | { |
b6f448e9 AS |
27 | } |
28 | ||
29 | static inline void pm_restore_console(void) | |
30 | { | |
31 | } | |
95d9ffbe RW |
32 | #endif |
33 | ||
34 | typedef int __bitwise suspend_state_t; | |
35 | ||
36 | #define PM_SUSPEND_ON ((__force suspend_state_t) 0) | |
690cbb90 | 37 | #define PM_SUSPEND_TO_IDLE ((__force suspend_state_t) 1) |
7e73c5ae | 38 | #define PM_SUSPEND_STANDBY ((__force suspend_state_t) 2) |
95d9ffbe | 39 | #define PM_SUSPEND_MEM ((__force suspend_state_t) 3) |
690cbb90 | 40 | #define PM_SUSPEND_MIN PM_SUSPEND_TO_IDLE |
95d9ffbe RW |
41 | #define PM_SUSPEND_MAX ((__force suspend_state_t) 4) |
42 | ||
2a77c46d SL |
43 | enum suspend_stat_step { |
44 | SUSPEND_FREEZE = 1, | |
45 | SUSPEND_PREPARE, | |
46 | SUSPEND_SUSPEND, | |
cf579dfb | 47 | SUSPEND_SUSPEND_LATE, |
2a77c46d SL |
48 | SUSPEND_SUSPEND_NOIRQ, |
49 | SUSPEND_RESUME_NOIRQ, | |
cf579dfb | 50 | SUSPEND_RESUME_EARLY, |
2a77c46d SL |
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; | |
cf579dfb | 60 | int failed_suspend_late; |
2a77c46d SL |
61 | int failed_suspend_noirq; |
62 | int failed_resume; | |
cf579dfb | 63 | int failed_resume_early; |
2a77c46d SL |
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 | ||
76 | static inline void dpm_save_failed_dev(const char *name) | |
77 | { | |
bd8092de | 78 | strscpy(suspend_stats.failed_devs[suspend_stats.last_failed_dev], |
2a77c46d SL |
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 | ||
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 | ||
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 | ||
95d9ffbe | 99 | /** |
26398a70 RW |
100 | * struct platform_suspend_ops - Callbacks for managing platform dependent |
101 | * system sleep states. | |
95d9ffbe RW |
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. | |
26398a70 RW |
108 | * There is the %suspend_valid_only_mem function available that can be |
109 | * assigned to this if the platform only supports mem sleep. | |
95d9ffbe | 110 | * |
c697eece RW |
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), | |
95d9ffbe RW |
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 | |
c697eece | 117 | * passed to @enter() is redundant and should be ignored. |
95d9ffbe RW |
118 | * |
119 | * @prepare: Prepare the platform for entering the system sleep state indicated | |
c697eece | 120 | * by @begin(). |
95d9ffbe RW |
121 | * @prepare() is called right after devices have been suspended (ie. the |
122 | * appropriate .suspend() method has been executed for each device) and | |
6a7c7eaf RW |
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(), | |
ce441011 | 126 | * and @wake() will not be called in that case). |
6a7c7eaf RW |
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 | |
ce441011 RW |
133 | * system cannot enter the desired sleep state (@enter() will not be |
134 | * executed). | |
95d9ffbe | 135 | * |
c697eece RW |
136 | * @enter: Enter the system sleep state indicated by @begin() or represented by |
137 | * the argument if @begin() is not implemented. | |
95d9ffbe RW |
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 | * | |
6a7c7eaf RW |
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 | |
ce441011 | 147 | * after @prepare_late and @enter(), even if one of them fails. |
6a7c7eaf RW |
148 | * |
149 | * @finish: Finish wake-up of the platform. | |
150 | * @finish is called right prior to calling device drivers' regular suspend | |
151 | * callbacks. | |
95d9ffbe RW |
152 | * This callback is optional, but should be implemented by the platforms |
153 | * that implement @prepare(). If implemented, it is always called after | |
ce441011 RW |
154 | * @enter() and @wake(), even if any of them fails. It is executed after |
155 | * a failing @prepare. | |
c697eece | 156 | * |
3b5fe852 MH |
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 | * | |
c697eece RW |
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 | |
6a7c7eaf RW |
168 | * that implement @begin(). Accordingly, platforms implementing @begin() |
169 | * should also provide a @end() which cleans up transitions aborted before | |
c697eece | 170 | * @enter(). |
d8f3de0d RW |
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. | |
95d9ffbe | 176 | */ |
26398a70 | 177 | struct platform_suspend_ops { |
95d9ffbe | 178 | int (*valid)(suspend_state_t state); |
c697eece | 179 | int (*begin)(suspend_state_t state); |
e6c5eb95 | 180 | int (*prepare)(void); |
6a7c7eaf | 181 | int (*prepare_late)(void); |
95d9ffbe | 182 | int (*enter)(suspend_state_t state); |
6a7c7eaf | 183 | void (*wake)(void); |
e6c5eb95 | 184 | void (*finish)(void); |
3b5fe852 | 185 | bool (*suspend_again)(void); |
c697eece | 186 | void (*end)(void); |
d8f3de0d | 187 | void (*recover)(void); |
95d9ffbe RW |
188 | }; |
189 | ||
23d5855f | 190 | struct platform_s2idle_ops { |
1f0b6386 | 191 | int (*begin)(void); |
a8d46b9e | 192 | int (*prepare)(void); |
ac9eafbe | 193 | int (*prepare_late)(void); |
811d59fd | 194 | void (*check)(void); |
e3728b50 | 195 | bool (*wake)(void); |
ac9eafbe | 196 | void (*restore_early)(void); |
a8d46b9e | 197 | void (*restore)(void); |
1f0b6386 RW |
198 | void (*end)(void); |
199 | }; | |
200 | ||
95d9ffbe | 201 | #ifdef CONFIG_SUSPEND |
e870c6c8 RW |
202 | extern suspend_state_t mem_sleep_current; |
203 | extern suspend_state_t mem_sleep_default; | |
204 | ||
95d9ffbe | 205 | /** |
26398a70 RW |
206 | * suspend_set_ops - set platform dependent suspend operations |
207 | * @ops: The new suspend operations to set. | |
95d9ffbe | 208 | */ |
2f55ac07 | 209 | extern void suspend_set_ops(const struct platform_suspend_ops *ops); |
26398a70 | 210 | extern int suspend_valid_only_mem(suspend_state_t state); |
38106313 | 211 | |
ef25ba04 RW |
212 | extern unsigned int pm_suspend_global_flags; |
213 | ||
471a739a RW |
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) | |
ef25ba04 RW |
217 | |
218 | static inline void pm_suspend_clear_flags(void) | |
219 | { | |
220 | pm_suspend_global_flags = 0; | |
221 | } | |
222 | ||
223 | static inline void pm_set_suspend_via_firmware(void) | |
224 | { | |
225 | pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_SUSPEND; | |
226 | } | |
227 | ||
228 | static inline void pm_set_resume_via_firmware(void) | |
229 | { | |
230 | pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_RESUME; | |
231 | } | |
232 | ||
471a739a RW |
233 | static inline void pm_set_suspend_no_platform(void) |
234 | { | |
235 | pm_suspend_global_flags |= PM_SUSPEND_FLAG_NO_PLATFORM; | |
236 | } | |
237 | ||
a6137347 RW |
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 | */ | |
ef25ba04 RW |
258 | static inline bool pm_suspend_via_firmware(void) |
259 | { | |
260 | return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_SUSPEND); | |
261 | } | |
262 | ||
a6137347 RW |
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 | */ | |
ef25ba04 RW |
274 | static inline bool pm_resume_via_firmware(void) |
275 | { | |
276 | return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_RESUME); | |
277 | } | |
278 | ||
471a739a RW |
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 | */ | |
290 | static inline bool pm_suspend_no_platform(void) | |
291 | { | |
292 | return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_NO_PLATFORM); | |
293 | } | |
294 | ||
38106313 | 295 | /* Suspend-to-idle state machnine. */ |
f02f4f9d RW |
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. */ | |
38106313 RW |
300 | }; |
301 | ||
f02f4f9d | 302 | extern enum s2idle_states __read_mostly s2idle_state; |
38106313 | 303 | |
f02f4f9d | 304 | static inline bool idle_should_enter_s2idle(void) |
38106313 | 305 | { |
f02f4f9d | 306 | return unlikely(s2idle_state == S2IDLE_STATE_ENTER); |
38106313 RW |
307 | } |
308 | ||
0b385a0c | 309 | extern bool pm_suspend_default_s2idle(void); |
fa7fd6fa | 310 | extern void __init pm_states_init(void); |
23d5855f | 311 | extern void s2idle_set_ops(const struct platform_s2idle_ops *ops); |
f02f4f9d | 312 | extern void s2idle_wake(void); |
95d9ffbe RW |
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); | |
c052bf82 | 333 | extern bool sync_on_suspend_enabled; |
95d9ffbe RW |
334 | #else /* !CONFIG_SUSPEND */ |
335 | #define suspend_valid_only_mem NULL | |
336 | ||
ef25ba04 RW |
337 | static inline void pm_suspend_clear_flags(void) {} |
338 | static inline void pm_set_suspend_via_firmware(void) {} | |
339 | static inline void pm_set_resume_via_firmware(void) {} | |
340 | static inline bool pm_suspend_via_firmware(void) { return false; } | |
341 | static inline bool pm_resume_via_firmware(void) { return false; } | |
10a08fd6 | 342 | static inline bool pm_suspend_no_platform(void) { return false; } |
0b385a0c | 343 | static inline bool pm_suspend_default_s2idle(void) { return false; } |
ef25ba04 | 344 | |
2f55ac07 | 345 | static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {} |
95d9ffbe | 346 | static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; } |
c052bf82 | 347 | static inline bool sync_on_suspend_enabled(void) { return true; } |
f02f4f9d | 348 | static inline bool idle_should_enter_s2idle(void) { return false; } |
fa7fd6fa | 349 | static inline void __init pm_states_init(void) {} |
23d5855f | 350 | static inline void s2idle_set_ops(const struct platform_s2idle_ops *ops) {} |
f02f4f9d | 351 | static inline void s2idle_wake(void) {} |
95d9ffbe | 352 | #endif /* !CONFIG_SUSPEND */ |
1da177e4 | 353 | |
8357376d RW |
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 | */ | |
dcbb5a54 | 358 | struct pbe { |
8357376d RW |
359 | void *address; /* address of the copy */ |
360 | void *orig_address; /* original address of a page */ | |
7088a5c0 | 361 | struct pbe *next; |
dcbb5a54 | 362 | }; |
1da177e4 | 363 | |
1da177e4 | 364 | /* mm/page_alloc.c */ |
1da177e4 LT |
365 | extern void mark_free_pages(struct zone *zone); |
366 | ||
a3d25c27 | 367 | /** |
b3dac3b3 | 368 | * struct platform_hibernation_ops - hibernation platform support |
a3d25c27 | 369 | * |
caea99ef RW |
370 | * The methods in this structure allow a platform to carry out special |
371 | * operations required by it during a hibernation transition. | |
a3d25c27 | 372 | * |
d8f3de0d | 373 | * All the methods below, except for @recover(), must be implemented. |
a3d25c27 | 374 | * |
caea99ef | 375 | * @begin: Tell the platform driver that we're starting hibernation. |
74f270af RW |
376 | * Called right after shrinking memory and before freezing devices. |
377 | * | |
caea99ef RW |
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 | * | |
74f270af RW |
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 | * | |
c7e0831d RW |
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 | * | |
74f270af RW |
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). | |
d8f3de0d RW |
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. | |
a3d25c27 | 418 | */ |
b3dac3b3 | 419 | struct platform_hibernation_ops { |
bb186901 | 420 | int (*begin)(pm_message_t stage); |
caea99ef | 421 | void (*end)(void); |
74f270af RW |
422 | int (*pre_snapshot)(void); |
423 | void (*finish)(void); | |
a3d25c27 RW |
424 | int (*prepare)(void); |
425 | int (*enter)(void); | |
c7e0831d | 426 | void (*leave)(void); |
a634cc10 RW |
427 | int (*pre_restore)(void); |
428 | void (*restore_cleanup)(void); | |
d8f3de0d | 429 | void (*recover)(void); |
a3d25c27 RW |
430 | }; |
431 | ||
b0cb1a19 | 432 | #ifdef CONFIG_HIBERNATION |
74dfd666 | 433 | /* kernel/power/snapshot.c */ |
33569ef3 | 434 | extern void register_nosave_region(unsigned long b, unsigned long e); |
74dfd666 RW |
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); | |
328008a7 AB |
439 | extern asmlinkage int swsusp_arch_suspend(void); |
440 | extern asmlinkage int swsusp_arch_resume(void); | |
a3d25c27 | 441 | |
74d95555 | 442 | extern u32 swsusp_hardware_signature; |
073ef1f6 | 443 | extern void hibernation_set_ops(const struct platform_hibernation_ops *ops); |
a3d25c27 | 444 | extern int hibernate(void); |
abfe2d7b | 445 | extern bool system_entering_hibernation(void); |
a6e15a39 | 446 | extern bool hibernation_available(void); |
603fb42a SC |
447 | asmlinkage int swsusp_save(void); |
448 | extern struct pbe *restore_pblist; | |
1ec0cd82 | 449 | int pfn_is_nosave(unsigned long pfn); |
48001ea5 DW |
450 | |
451 | int hibernate_quiet_exec(int (*func)(void *data), void *data); | |
b0cb1a19 | 452 | #else /* CONFIG_HIBERNATION */ |
1f112cee | 453 | static inline void register_nosave_region(unsigned long b, unsigned long e) {} |
74dfd666 RW |
454 | static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } |
455 | static inline void swsusp_set_page_free(struct page *p) {} | |
456 | static inline void swsusp_unset_page_free(struct page *p) {} | |
a3d25c27 | 457 | |
073ef1f6 | 458 | static inline void hibernation_set_ops(const struct platform_hibernation_ops *ops) {} |
a3d25c27 | 459 | static inline int hibernate(void) { return -ENOSYS; } |
fce2b111 | 460 | static inline bool system_entering_hibernation(void) { return false; } |
a6e15a39 | 461 | static inline bool hibernation_available(void) { return false; } |
48001ea5 DW |
462 | |
463 | static inline int hibernate_quiet_exec(int (*func)(void *data), void *data) { | |
464 | return -ENOTSUPP; | |
465 | } | |
fce2b111 CH |
466 | #endif /* CONFIG_HIBERNATION */ |
467 | ||
ad1e4f74 | 468 | #ifdef CONFIG_HIBERNATION_SNAPSHOT_DEV |
bb3247a3 | 469 | int is_hibernate_resume_dev(dev_t dev); |
ad1e4f74 | 470 | #else |
bb3247a3 | 471 | static inline int is_hibernate_resume_dev(dev_t dev) { return 0; } |
ad1e4f74 DA |
472 | #endif |
473 | ||
35eb6db1 AW |
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 | ||
55f2503c | 482 | extern struct mutex system_transition_mutex; |
9b6fc5dc | 483 | |
296699de | 484 | #ifdef CONFIG_PM_SLEEP |
1da177e4 LT |
485 | void save_processor_state(void); |
486 | void restore_processor_state(void); | |
25761b6e | 487 | |
b10d9117 | 488 | /* kernel/power/main.c */ |
82525756 AS |
489 | extern int register_pm_notifier(struct notifier_block *nb); |
490 | extern int unregister_pm_notifier(struct notifier_block *nb); | |
b5dee313 | 491 | extern void ksys_sync_helper(void); |
b10d9117 RW |
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 | } | |
c125e96f RW |
498 | |
499 | /* drivers/base/power/wakeup.c */ | |
500 | extern bool events_check_enabled; | |
bd8c9ba3 | 501 | extern suspend_state_t pm_suspend_target_state; |
c125e96f | 502 | |
a2867e08 | 503 | extern bool pm_wakeup_pending(void); |
068765ba | 504 | extern void pm_system_wakeup(void); |
33e4f80e | 505 | extern void pm_system_cancel_wakeup(void); |
cb1f65c1 | 506 | extern void pm_wakeup_clear(unsigned int irq_number); |
a6f5f0dd | 507 | extern void pm_system_irq_wakeup(unsigned int irq_number); |
cb1f65c1 | 508 | extern unsigned int pm_wakeup_irq(void); |
7483b4a4 | 509 | extern bool pm_get_wakeup_count(unsigned int *count, bool block); |
074037ec | 510 | extern bool pm_save_wakeup_count(unsigned int count); |
55850945 | 511 | extern void pm_wakep_autosleep_enabled(bool set); |
bb177fed | 512 | extern void pm_print_active_wakeup_sources(void); |
9b6fc5dc | 513 | |
5950e5d5 PZ |
514 | extern unsigned int lock_system_sleep(void); |
515 | extern void unlock_system_sleep(unsigned int); | |
9b6fc5dc | 516 | |
296699de | 517 | #else /* !CONFIG_PM_SLEEP */ |
b10d9117 RW |
518 | |
519 | static inline int register_pm_notifier(struct notifier_block *nb) | |
520 | { | |
521 | return 0; | |
522 | } | |
523 | ||
524 | static inline int unregister_pm_notifier(struct notifier_block *nb) | |
525 | { | |
526 | return 0; | |
527 | } | |
528 | ||
b5dee313 HP |
529 | static inline void ksys_sync_helper(void) {} |
530 | ||
b10d9117 | 531 | #define pm_notifier(fn, pri) do { (void)(fn); } while (0) |
dbeeec5f | 532 | |
a2867e08 | 533 | static inline bool pm_wakeup_pending(void) { return false; } |
068765ba | 534 | static inline void pm_system_wakeup(void) {} |
33e4f80e | 535 | static inline void pm_wakeup_clear(bool reset) {} |
a6f5f0dd | 536 | static inline void pm_system_irq_wakeup(unsigned int irq_number) {} |
6ad696d2 | 537 | |
5950e5d5 PZ |
538 | static inline unsigned int lock_system_sleep(void) { return 0; } |
539 | static inline void unlock_system_sleep(unsigned int flags) {} | |
6ad696d2 | 540 | |
9b6fc5dc | 541 | #endif /* !CONFIG_PM_SLEEP */ |
89081d17 | 542 | |
b2df1d4f RW |
543 | #ifdef CONFIG_PM_SLEEP_DEBUG |
544 | extern bool pm_print_times_enabled; | |
726fb6b4 | 545 | extern bool pm_debug_messages_on; |
ce1cb680 DC |
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) | |
b2df1d4f RW |
569 | #else |
570 | #define pm_print_times_enabled (false) | |
726fb6b4 | 571 | #define pm_debug_messages_on (false) |
8d8b2441 RW |
572 | |
573 | #include <linux/printk.h> | |
574 | ||
ce1cb680 DC |
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__) | |
b2df1d4f RW |
579 | #endif |
580 | ||
ce1cb680 DC |
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 | */ | |
cb08e035 | 591 | #define pm_pr_dbg(fmt, ...) \ |
ce1cb680 | 592 | __pm_pr_dbg(fmt, ##__VA_ARGS__) |
cb08e035 RW |
593 | |
594 | #define pm_deferred_pr_dbg(fmt, ...) \ | |
ce1cb680 | 595 | __pm_deferred_pr_dbg(fmt, ##__VA_ARGS__) |
cb08e035 | 596 | |
7483b4a4 RW |
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 | ||
604 | static inline void queue_up_suspend_work(void) {} | |
605 | ||
606 | #endif /* !CONFIG_PM_AUTOSLEEP */ | |
607 | ||
95d9ffbe | 608 | #endif /* _LINUX_SUSPEND_H */ |