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 /** 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 pm_suspend_clear_flags(void)163 static inline void pm_suspend_clear_flags(void) 164 { 165 pm_suspend_global_flags = 0; 166 } 167 pm_set_suspend_via_firmware(void)168 static inline void pm_set_suspend_via_firmware(void) 169 { 170 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_SUSPEND; 171 } 172 pm_set_resume_via_firmware(void)173 static inline void pm_set_resume_via_firmware(void) 174 { 175 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_RESUME; 176 } 177 pm_set_suspend_no_platform(void)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 */ pm_suspend_via_firmware(void)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 */ pm_resume_via_firmware(void)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 */ pm_suspend_no_platform(void)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 idle_should_enter_s2idle(void)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 pm_suspend_clear_flags(void)284 static inline void pm_suspend_clear_flags(void) {} pm_set_suspend_via_firmware(void)285 static inline void pm_set_suspend_via_firmware(void) {} pm_set_resume_via_firmware(void)286 static inline void pm_set_resume_via_firmware(void) {} pm_suspend_via_firmware(void)287 static inline bool pm_suspend_via_firmware(void) { return false; } pm_resume_via_firmware(void)288 static inline bool pm_resume_via_firmware(void) { return false; } pm_suspend_no_platform(void)289 static inline bool pm_suspend_no_platform(void) { return false; } pm_suspend_default_s2idle(void)290 static inline bool pm_suspend_default_s2idle(void) { return false; } 291 suspend_set_ops(const struct platform_suspend_ops * ops)292 static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {} pm_suspend(suspend_state_t state)293 static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; } sync_on_suspend_enabled(void)294 static inline bool sync_on_suspend_enabled(void) { return true; } idle_should_enter_s2idle(void)295 static inline bool idle_should_enter_s2idle(void) { return false; } pm_states_init(void)296 static inline void __init pm_states_init(void) {} s2idle_set_ops(const struct platform_s2idle_ops * ops)297 static inline void s2idle_set_ops(const struct platform_s2idle_ops *ops) {} s2idle_wake(void)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 arch_hibernation_header_save(void *addr, unsigned int max_size); 398 int arch_hibernation_header_restore(void *addr); 399 400 #else /* CONFIG_HIBERNATION */ register_nosave_region(unsigned long b,unsigned long e)401 static inline void register_nosave_region(unsigned long b, unsigned long e) {} swsusp_page_is_forbidden(struct page * p)402 static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } swsusp_set_page_free(struct page * p)403 static inline void swsusp_set_page_free(struct page *p) {} swsusp_unset_page_free(struct page * p)404 static inline void swsusp_unset_page_free(struct page *p) {} 405 hibernation_set_ops(const struct platform_hibernation_ops * ops)406 static inline void hibernation_set_ops(const struct platform_hibernation_ops *ops) {} hibernate(void)407 static inline int hibernate(void) { return -ENOSYS; } system_entering_hibernation(void)408 static inline bool system_entering_hibernation(void) { return false; } hibernation_available(void)409 static inline bool hibernation_available(void) { return false; } 410 hibernate_quiet_exec(int (* func)(void * data),void * data)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 is_hibernate_resume_dev(dev_t dev)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 pm_suspended_storage(void)454 static inline bool pm_suspended_storage(void) 455 { 456 return !gfp_has_io_fs(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 register_pm_notifier(struct notifier_block * nb)475 static inline int register_pm_notifier(struct notifier_block *nb) 476 { 477 return 0; 478 } 479 unregister_pm_notifier(struct notifier_block * nb)480 static inline int unregister_pm_notifier(struct notifier_block *nb) 481 { 482 return 0; 483 } 484 pm_report_hw_sleep_time(u64 t)485 static inline void pm_report_hw_sleep_time(u64 t) {}; pm_report_max_hw_sleep(u64 t)486 static inline void pm_report_max_hw_sleep(u64 t) {}; 487 ksys_sync_helper(void)488 static inline void ksys_sync_helper(void) {} 489 490 #define pm_notifier(fn, pri) do { (void)(fn); } while (0) 491 pm_suspended_storage(void)492 static inline bool pm_suspended_storage(void) { return false; } pm_wakeup_pending(void)493 static inline bool pm_wakeup_pending(void) { return false; } pm_system_wakeup(void)494 static inline void pm_system_wakeup(void) {} pm_wakeup_clear(bool reset)495 static inline void pm_wakeup_clear(bool reset) {} pm_system_irq_wakeup(unsigned int irq_number)496 static inline void pm_system_irq_wakeup(unsigned int irq_number) {} 497 lock_system_sleep(void)498 static inline unsigned int lock_system_sleep(void) { return 0; } unlock_system_sleep(unsigned int flags)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); pm_dyn_debug_messages_on(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 queue_up_suspend_work(void)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