Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_SUSPEND_H |
| 2 | #define _LINUX_SUSPEND_H |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | #include <linux/swap.h> |
| 5 | #include <linux/notifier.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | #include <linux/init.h> |
| 7 | #include <linux/pm.h> |
Rafael J. Wysocki | 7be9823 | 2007-05-06 14:50:42 -0700 | [diff] [blame] | 8 | #include <linux/mm.h> |
Srivatsa S. Bhat | 33e638b | 2011-12-06 23:18:12 +0100 | [diff] [blame] | 9 | #include <linux/freezer.h> |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 10 | #include <asm/errno.h> |
| 11 | |
H Hartley Sweeten | 37cce26 | 2011-09-21 22:47:55 +0200 | [diff] [blame] | 12 | #ifdef CONFIG_VT |
Andres Salomon | b6f448e | 2008-04-28 02:15:03 -0700 | [diff] [blame] | 13 | extern void pm_set_vt_switch(int); |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 14 | #else |
Andres Salomon | b6f448e | 2008-04-28 02:15:03 -0700 | [diff] [blame] | 15 | static inline void pm_set_vt_switch(int do_switch) |
| 16 | { |
| 17 | } |
H Hartley Sweeten | 37cce26 | 2011-09-21 22:47:55 +0200 | [diff] [blame] | 18 | #endif |
Andres Salomon | b6f448e | 2008-04-28 02:15:03 -0700 | [diff] [blame] | 19 | |
H Hartley Sweeten | 37cce26 | 2011-09-21 22:47:55 +0200 | [diff] [blame] | 20 | #ifdef CONFIG_VT_CONSOLE_SLEEP |
Borislav Petkov | ca5f2b4 | 2016-06-14 16:23:22 +0200 | [diff] [blame] | 21 | extern void pm_prepare_console(void); |
H Hartley Sweeten | 37cce26 | 2011-09-21 22:47:55 +0200 | [diff] [blame] | 22 | extern void pm_restore_console(void); |
| 23 | #else |
Borislav Petkov | ca5f2b4 | 2016-06-14 16:23:22 +0200 | [diff] [blame] | 24 | static inline void pm_prepare_console(void) |
Andres Salomon | b6f448e | 2008-04-28 02:15:03 -0700 | [diff] [blame] | 25 | { |
Andres Salomon | b6f448e | 2008-04-28 02:15:03 -0700 | [diff] [blame] | 26 | } |
| 27 | |
| 28 | static inline void pm_restore_console(void) |
| 29 | { |
| 30 | } |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 31 | #endif |
| 32 | |
| 33 | typedef int __bitwise suspend_state_t; |
| 34 | |
| 35 | #define PM_SUSPEND_ON ((__force suspend_state_t) 0) |
Rafael J. Wysocki | 690cbb9 | 2017-08-10 00:13:07 +0200 | [diff] [blame] | 36 | #define PM_SUSPEND_TO_IDLE ((__force suspend_state_t) 1) |
Zhang Rui | 7e73c5a | 2013-02-06 13:00:36 +0100 | [diff] [blame] | 37 | #define PM_SUSPEND_STANDBY ((__force suspend_state_t) 2) |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 38 | #define PM_SUSPEND_MEM ((__force suspend_state_t) 3) |
Rafael J. Wysocki | 690cbb9 | 2017-08-10 00:13:07 +0200 | [diff] [blame] | 39 | #define PM_SUSPEND_MIN PM_SUSPEND_TO_IDLE |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 40 | #define PM_SUSPEND_MAX ((__force suspend_state_t) 4) |
| 41 | |
ShuoX Liu | 2a77c46 | 2011-08-10 23:01:26 +0200 | [diff] [blame] | 42 | enum suspend_stat_step { |
| 43 | SUSPEND_FREEZE = 1, |
| 44 | SUSPEND_PREPARE, |
| 45 | SUSPEND_SUSPEND, |
Rafael J. Wysocki | cf579df | 2012-01-29 20:38:29 +0100 | [diff] [blame] | 46 | SUSPEND_SUSPEND_LATE, |
ShuoX Liu | 2a77c46 | 2011-08-10 23:01:26 +0200 | [diff] [blame] | 47 | SUSPEND_SUSPEND_NOIRQ, |
| 48 | SUSPEND_RESUME_NOIRQ, |
Rafael J. Wysocki | cf579df | 2012-01-29 20:38:29 +0100 | [diff] [blame] | 49 | SUSPEND_RESUME_EARLY, |
ShuoX Liu | 2a77c46 | 2011-08-10 23:01:26 +0200 | [diff] [blame] | 50 | SUSPEND_RESUME |
| 51 | }; |
| 52 | |
| 53 | struct suspend_stats { |
| 54 | int success; |
| 55 | int fail; |
| 56 | int failed_freeze; |
| 57 | int failed_prepare; |
| 58 | int failed_suspend; |
Rafael J. Wysocki | cf579df | 2012-01-29 20:38:29 +0100 | [diff] [blame] | 59 | int failed_suspend_late; |
ShuoX Liu | 2a77c46 | 2011-08-10 23:01:26 +0200 | [diff] [blame] | 60 | int failed_suspend_noirq; |
| 61 | int failed_resume; |
Rafael J. Wysocki | cf579df | 2012-01-29 20:38:29 +0100 | [diff] [blame] | 62 | int failed_resume_early; |
ShuoX Liu | 2a77c46 | 2011-08-10 23:01:26 +0200 | [diff] [blame] | 63 | int failed_resume_noirq; |
| 64 | #define REC_FAILED_NUM 2 |
| 65 | int last_failed_dev; |
| 66 | char failed_devs[REC_FAILED_NUM][40]; |
| 67 | int last_failed_errno; |
| 68 | int errno[REC_FAILED_NUM]; |
| 69 | int last_failed_step; |
| 70 | enum suspend_stat_step failed_steps[REC_FAILED_NUM]; |
| 71 | }; |
| 72 | |
| 73 | extern struct suspend_stats suspend_stats; |
| 74 | |
| 75 | static inline void dpm_save_failed_dev(const char *name) |
| 76 | { |
| 77 | strlcpy(suspend_stats.failed_devs[suspend_stats.last_failed_dev], |
| 78 | name, |
| 79 | sizeof(suspend_stats.failed_devs[0])); |
| 80 | suspend_stats.last_failed_dev++; |
| 81 | suspend_stats.last_failed_dev %= REC_FAILED_NUM; |
| 82 | } |
| 83 | |
| 84 | static inline void dpm_save_failed_errno(int err) |
| 85 | { |
| 86 | suspend_stats.errno[suspend_stats.last_failed_errno] = err; |
| 87 | suspend_stats.last_failed_errno++; |
| 88 | suspend_stats.last_failed_errno %= REC_FAILED_NUM; |
| 89 | } |
| 90 | |
| 91 | static inline void dpm_save_failed_step(enum suspend_stat_step step) |
| 92 | { |
| 93 | suspend_stats.failed_steps[suspend_stats.last_failed_step] = step; |
| 94 | suspend_stats.last_failed_step++; |
| 95 | suspend_stats.last_failed_step %= REC_FAILED_NUM; |
| 96 | } |
| 97 | |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 98 | /** |
Rafael J. Wysocki | 26398a7 | 2007-10-18 03:04:40 -0700 | [diff] [blame] | 99 | * struct platform_suspend_ops - Callbacks for managing platform dependent |
| 100 | * system sleep states. |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 101 | * |
| 102 | * @valid: Callback to determine if given system sleep state is supported by |
| 103 | * the platform. |
| 104 | * Valid (ie. supported) states are advertised in /sys/power/state. Note |
| 105 | * that it still may be impossible to enter given system sleep state if the |
| 106 | * conditions aren't right. |
Rafael J. Wysocki | 26398a7 | 2007-10-18 03:04:40 -0700 | [diff] [blame] | 107 | * There is the %suspend_valid_only_mem function available that can be |
| 108 | * assigned to this if the platform only supports mem sleep. |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 109 | * |
Rafael J. Wysocki | c697eec | 2008-01-08 00:04:17 +0100 | [diff] [blame] | 110 | * @begin: Initialise a transition to given system sleep state. |
| 111 | * @begin() is executed right prior to suspending devices. The information |
| 112 | * conveyed to the platform code by @begin() should be disregarded by it as |
| 113 | * soon as @end() is executed. If @begin() fails (ie. returns nonzero), |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 114 | * @prepare(), @enter() and @finish() will not be called by the PM core. |
| 115 | * This callback is optional. However, if it is implemented, the argument |
Rafael J. Wysocki | c697eec | 2008-01-08 00:04:17 +0100 | [diff] [blame] | 116 | * passed to @enter() is redundant and should be ignored. |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 117 | * |
| 118 | * @prepare: Prepare the platform for entering the system sleep state indicated |
Rafael J. Wysocki | c697eec | 2008-01-08 00:04:17 +0100 | [diff] [blame] | 119 | * by @begin(). |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 120 | * @prepare() is called right after devices have been suspended (ie. the |
| 121 | * appropriate .suspend() method has been executed for each device) and |
Rafael J. Wysocki | 6a7c7ea | 2009-04-19 20:08:42 +0200 | [diff] [blame] | 122 | * before device drivers' late suspend callbacks are executed. It returns |
| 123 | * 0 on success or a negative error code otherwise, in which case the |
| 124 | * system cannot enter the desired sleep state (@prepare_late(), @enter(), |
Rafael J. Wysocki | ce44101 | 2010-07-07 23:43:45 +0200 | [diff] [blame] | 125 | * and @wake() will not be called in that case). |
Rafael J. Wysocki | 6a7c7ea | 2009-04-19 20:08:42 +0200 | [diff] [blame] | 126 | * |
| 127 | * @prepare_late: Finish preparing the platform for entering the system sleep |
| 128 | * state indicated by @begin(). |
| 129 | * @prepare_late is called before disabling nonboot CPUs and after |
| 130 | * device drivers' late suspend callbacks have been executed. It returns |
| 131 | * 0 on success or a negative error code otherwise, in which case the |
Rafael J. Wysocki | ce44101 | 2010-07-07 23:43:45 +0200 | [diff] [blame] | 132 | * system cannot enter the desired sleep state (@enter() will not be |
| 133 | * executed). |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 134 | * |
Rafael J. Wysocki | c697eec | 2008-01-08 00:04:17 +0100 | [diff] [blame] | 135 | * @enter: Enter the system sleep state indicated by @begin() or represented by |
| 136 | * the argument if @begin() is not implemented. |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 137 | * This callback is mandatory. It returns 0 on success or a negative |
| 138 | * error code otherwise, in which case the system cannot enter the desired |
| 139 | * sleep state. |
| 140 | * |
Rafael J. Wysocki | 6a7c7ea | 2009-04-19 20:08:42 +0200 | [diff] [blame] | 141 | * @wake: Called when the system has just left a sleep state, right after |
| 142 | * the nonboot CPUs have been enabled and before device drivers' early |
| 143 | * resume callbacks are executed. |
| 144 | * This callback is optional, but should be implemented by the platforms |
| 145 | * that implement @prepare_late(). If implemented, it is always called |
Rafael J. Wysocki | ce44101 | 2010-07-07 23:43:45 +0200 | [diff] [blame] | 146 | * after @prepare_late and @enter(), even if one of them fails. |
Rafael J. Wysocki | 6a7c7ea | 2009-04-19 20:08:42 +0200 | [diff] [blame] | 147 | * |
| 148 | * @finish: Finish wake-up of the platform. |
| 149 | * @finish is called right prior to calling device drivers' regular suspend |
| 150 | * callbacks. |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 151 | * This callback is optional, but should be implemented by the platforms |
| 152 | * that implement @prepare(). If implemented, it is always called after |
Rafael J. Wysocki | ce44101 | 2010-07-07 23:43:45 +0200 | [diff] [blame] | 153 | * @enter() and @wake(), even if any of them fails. It is executed after |
| 154 | * a failing @prepare. |
Rafael J. Wysocki | c697eec | 2008-01-08 00:04:17 +0100 | [diff] [blame] | 155 | * |
MyungJoo Ham | 3b5fe85 | 2011-06-12 15:57:05 +0200 | [diff] [blame] | 156 | * @suspend_again: Returns whether the system should suspend again (true) or |
| 157 | * not (false). If the platform wants to poll sensors or execute some |
| 158 | * code during suspended without invoking userspace and most of devices, |
| 159 | * suspend_again callback is the place assuming that periodic-wakeup or |
| 160 | * alarm-wakeup is already setup. This allows to execute some codes while |
| 161 | * being kept suspended in the view of userland and devices. |
| 162 | * |
Rafael J. Wysocki | c697eec | 2008-01-08 00:04:17 +0100 | [diff] [blame] | 163 | * @end: Called by the PM core right after resuming devices, to indicate to |
| 164 | * the platform that the system has returned to the working state or |
| 165 | * the transition to the sleep state has been aborted. |
| 166 | * This callback is optional, but should be implemented by the platforms |
Rafael J. Wysocki | 6a7c7ea | 2009-04-19 20:08:42 +0200 | [diff] [blame] | 167 | * that implement @begin(). Accordingly, platforms implementing @begin() |
| 168 | * should also provide a @end() which cleans up transitions aborted before |
Rafael J. Wysocki | c697eec | 2008-01-08 00:04:17 +0100 | [diff] [blame] | 169 | * @enter(). |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 170 | * |
| 171 | * @recover: Recover the platform from a suspend failure. |
| 172 | * Called by the PM core if the suspending of devices fails. |
| 173 | * This callback is optional and should only be implemented by platforms |
| 174 | * which require special recovery actions in that situation. |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 175 | */ |
Rafael J. Wysocki | 26398a7 | 2007-10-18 03:04:40 -0700 | [diff] [blame] | 176 | struct platform_suspend_ops { |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 177 | int (*valid)(suspend_state_t state); |
Rafael J. Wysocki | c697eec | 2008-01-08 00:04:17 +0100 | [diff] [blame] | 178 | int (*begin)(suspend_state_t state); |
Rafael J. Wysocki | e6c5eb9 | 2007-10-18 03:04:41 -0700 | [diff] [blame] | 179 | int (*prepare)(void); |
Rafael J. Wysocki | 6a7c7ea | 2009-04-19 20:08:42 +0200 | [diff] [blame] | 180 | int (*prepare_late)(void); |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 181 | int (*enter)(suspend_state_t state); |
Rafael J. Wysocki | 6a7c7ea | 2009-04-19 20:08:42 +0200 | [diff] [blame] | 182 | void (*wake)(void); |
Rafael J. Wysocki | e6c5eb9 | 2007-10-18 03:04:41 -0700 | [diff] [blame] | 183 | void (*finish)(void); |
MyungJoo Ham | 3b5fe85 | 2011-06-12 15:57:05 +0200 | [diff] [blame] | 184 | bool (*suspend_again)(void); |
Rafael J. Wysocki | c697eec | 2008-01-08 00:04:17 +0100 | [diff] [blame] | 185 | void (*end)(void); |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 186 | void (*recover)(void); |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 187 | }; |
| 188 | |
Rafael J. Wysocki | 23d5855 | 2017-08-10 00:15:30 +0200 | [diff] [blame] | 189 | struct platform_s2idle_ops { |
Rafael J. Wysocki | 1f0b638 | 2014-05-15 23:29:57 +0200 | [diff] [blame] | 190 | int (*begin)(void); |
Rafael J. Wysocki | a8d46b9 | 2014-09-30 02:29:01 +0200 | [diff] [blame] | 191 | int (*prepare)(void); |
Rafael J. Wysocki | 33e4f80 | 2017-06-12 22:56:34 +0200 | [diff] [blame] | 192 | void (*wake)(void); |
| 193 | void (*sync)(void); |
Rafael J. Wysocki | a8d46b9 | 2014-09-30 02:29:01 +0200 | [diff] [blame] | 194 | void (*restore)(void); |
Rafael J. Wysocki | 1f0b638 | 2014-05-15 23:29:57 +0200 | [diff] [blame] | 195 | void (*end)(void); |
| 196 | }; |
| 197 | |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 198 | #ifdef CONFIG_SUSPEND |
Rafael J. Wysocki | e870c6c8 | 2017-07-31 23:43:18 +0200 | [diff] [blame] | 199 | extern suspend_state_t mem_sleep_current; |
| 200 | extern suspend_state_t mem_sleep_default; |
| 201 | |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 202 | /** |
Rafael J. Wysocki | 26398a7 | 2007-10-18 03:04:40 -0700 | [diff] [blame] | 203 | * suspend_set_ops - set platform dependent suspend operations |
| 204 | * @ops: The new suspend operations to set. |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 205 | */ |
Lionel Debroux | 2f55ac0 | 2010-11-16 14:14:02 +0100 | [diff] [blame] | 206 | extern void suspend_set_ops(const struct platform_suspend_ops *ops); |
Rafael J. Wysocki | 26398a7 | 2007-10-18 03:04:40 -0700 | [diff] [blame] | 207 | extern int suspend_valid_only_mem(suspend_state_t state); |
Rafael J. Wysocki | 3810631 | 2015-02-12 23:33:15 +0100 | [diff] [blame] | 208 | |
Rafael J. Wysocki | ef25ba0 | 2015-10-07 00:49:34 +0200 | [diff] [blame] | 209 | extern unsigned int pm_suspend_global_flags; |
| 210 | |
| 211 | #define PM_SUSPEND_FLAG_FW_SUSPEND (1 << 0) |
| 212 | #define PM_SUSPEND_FLAG_FW_RESUME (1 << 1) |
| 213 | |
| 214 | static inline void pm_suspend_clear_flags(void) |
| 215 | { |
| 216 | pm_suspend_global_flags = 0; |
| 217 | } |
| 218 | |
| 219 | static inline void pm_set_suspend_via_firmware(void) |
| 220 | { |
| 221 | pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_SUSPEND; |
| 222 | } |
| 223 | |
| 224 | static inline void pm_set_resume_via_firmware(void) |
| 225 | { |
| 226 | pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_RESUME; |
| 227 | } |
| 228 | |
| 229 | static inline bool pm_suspend_via_firmware(void) |
| 230 | { |
| 231 | return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_SUSPEND); |
| 232 | } |
| 233 | |
| 234 | static inline bool pm_resume_via_firmware(void) |
| 235 | { |
| 236 | return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_RESUME); |
| 237 | } |
| 238 | |
Rafael J. Wysocki | 3810631 | 2015-02-12 23:33:15 +0100 | [diff] [blame] | 239 | /* Suspend-to-idle state machnine. */ |
Rafael J. Wysocki | f02f4f9 | 2017-08-10 00:13:56 +0200 | [diff] [blame] | 240 | enum s2idle_states { |
| 241 | S2IDLE_STATE_NONE, /* Not suspended/suspending. */ |
| 242 | S2IDLE_STATE_ENTER, /* Enter suspend-to-idle. */ |
| 243 | S2IDLE_STATE_WAKE, /* Wake up from suspend-to-idle. */ |
Rafael J. Wysocki | 3810631 | 2015-02-12 23:33:15 +0100 | [diff] [blame] | 244 | }; |
| 245 | |
Rafael J. Wysocki | f02f4f9 | 2017-08-10 00:13:56 +0200 | [diff] [blame] | 246 | extern enum s2idle_states __read_mostly s2idle_state; |
Rafael J. Wysocki | 3810631 | 2015-02-12 23:33:15 +0100 | [diff] [blame] | 247 | |
Rafael J. Wysocki | f02f4f9 | 2017-08-10 00:13:56 +0200 | [diff] [blame] | 248 | static inline bool idle_should_enter_s2idle(void) |
Rafael J. Wysocki | 3810631 | 2015-02-12 23:33:15 +0100 | [diff] [blame] | 249 | { |
Rafael J. Wysocki | f02f4f9 | 2017-08-10 00:13:56 +0200 | [diff] [blame] | 250 | return unlikely(s2idle_state == S2IDLE_STATE_ENTER); |
Rafael J. Wysocki | 3810631 | 2015-02-12 23:33:15 +0100 | [diff] [blame] | 251 | } |
| 252 | |
Sudeep Holla | fa7fd6f | 2016-08-19 14:41:00 +0100 | [diff] [blame] | 253 | extern void __init pm_states_init(void); |
Rafael J. Wysocki | 23d5855 | 2017-08-10 00:15:30 +0200 | [diff] [blame] | 254 | extern void s2idle_set_ops(const struct platform_s2idle_ops *ops); |
Rafael J. Wysocki | f02f4f9 | 2017-08-10 00:13:56 +0200 | [diff] [blame] | 255 | extern void s2idle_wake(void); |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 256 | |
| 257 | /** |
| 258 | * arch_suspend_disable_irqs - disable IRQs for suspend |
| 259 | * |
| 260 | * Disables IRQs (in the default case). This is a weak symbol in the common |
| 261 | * code and thus allows architectures to override it if more needs to be |
| 262 | * done. Not called for suspend to disk. |
| 263 | */ |
| 264 | extern void arch_suspend_disable_irqs(void); |
| 265 | |
| 266 | /** |
| 267 | * arch_suspend_enable_irqs - enable IRQs after suspend |
| 268 | * |
| 269 | * Enables IRQs (in the default case). This is a weak symbol in the common |
| 270 | * code and thus allows architectures to override it if more needs to be |
| 271 | * done. Not called for suspend to disk. |
| 272 | */ |
| 273 | extern void arch_suspend_enable_irqs(void); |
| 274 | |
| 275 | extern int pm_suspend(suspend_state_t state); |
| 276 | #else /* !CONFIG_SUSPEND */ |
| 277 | #define suspend_valid_only_mem NULL |
| 278 | |
Rafael J. Wysocki | ef25ba0 | 2015-10-07 00:49:34 +0200 | [diff] [blame] | 279 | static inline void pm_suspend_clear_flags(void) {} |
| 280 | static inline void pm_set_suspend_via_firmware(void) {} |
| 281 | static inline void pm_set_resume_via_firmware(void) {} |
| 282 | static inline bool pm_suspend_via_firmware(void) { return false; } |
| 283 | static inline bool pm_resume_via_firmware(void) { return false; } |
| 284 | |
Lionel Debroux | 2f55ac0 | 2010-11-16 14:14:02 +0100 | [diff] [blame] | 285 | static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {} |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 286 | static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; } |
Rafael J. Wysocki | f02f4f9 | 2017-08-10 00:13:56 +0200 | [diff] [blame] | 287 | static inline bool idle_should_enter_s2idle(void) { return false; } |
Sudeep Holla | fa7fd6f | 2016-08-19 14:41:00 +0100 | [diff] [blame] | 288 | static inline void __init pm_states_init(void) {} |
Rafael J. Wysocki | 23d5855 | 2017-08-10 00:15:30 +0200 | [diff] [blame] | 289 | static inline void s2idle_set_ops(const struct platform_s2idle_ops *ops) {} |
Rafael J. Wysocki | f02f4f9 | 2017-08-10 00:13:56 +0200 | [diff] [blame] | 290 | static inline void s2idle_wake(void) {} |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 291 | #endif /* !CONFIG_SUSPEND */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
Rafael J. Wysocki | 8357376 | 2006-12-06 20:34:18 -0800 | [diff] [blame] | 293 | /* struct pbe is used for creating lists of pages that should be restored |
| 294 | * atomically during the resume from disk, because the page frames they have |
| 295 | * occupied before the suspend are in use. |
| 296 | */ |
Rafael J. Wysocki | dcbb5a5 | 2006-09-25 23:32:51 -0700 | [diff] [blame] | 297 | struct pbe { |
Rafael J. Wysocki | 8357376 | 2006-12-06 20:34:18 -0800 | [diff] [blame] | 298 | void *address; /* address of the copy */ |
| 299 | void *orig_address; /* original address of a page */ |
Rafael J. Wysocki | 7088a5c | 2006-01-06 00:13:05 -0800 | [diff] [blame] | 300 | struct pbe *next; |
Rafael J. Wysocki | dcbb5a5 | 2006-09-25 23:32:51 -0700 | [diff] [blame] | 301 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | /* mm/page_alloc.c */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | extern void mark_free_pages(struct zone *zone); |
| 305 | |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 306 | /** |
Rafael J. Wysocki | b3dac3b | 2007-10-18 03:04:43 -0700 | [diff] [blame] | 307 | * struct platform_hibernation_ops - hibernation platform support |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 308 | * |
Rafael J. Wysocki | caea99e | 2008-01-08 00:08:44 +0100 | [diff] [blame] | 309 | * The methods in this structure allow a platform to carry out special |
| 310 | * operations required by it during a hibernation transition. |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 311 | * |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 312 | * All the methods below, except for @recover(), must be implemented. |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 313 | * |
Rafael J. Wysocki | caea99e | 2008-01-08 00:08:44 +0100 | [diff] [blame] | 314 | * @begin: Tell the platform driver that we're starting hibernation. |
Rafael J. Wysocki | 74f270a | 2007-10-18 03:04:42 -0700 | [diff] [blame] | 315 | * Called right after shrinking memory and before freezing devices. |
| 316 | * |
Rafael J. Wysocki | caea99e | 2008-01-08 00:08:44 +0100 | [diff] [blame] | 317 | * @end: Called by the PM core right after resuming devices, to indicate to |
| 318 | * the platform that the system has returned to the working state. |
| 319 | * |
Rafael J. Wysocki | 74f270a | 2007-10-18 03:04:42 -0700 | [diff] [blame] | 320 | * @pre_snapshot: Prepare the platform for creating the hibernation image. |
| 321 | * Called right after devices have been frozen and before the nonboot |
| 322 | * CPUs are disabled (runs with IRQs on). |
| 323 | * |
| 324 | * @finish: Restore the previous state of the platform after the hibernation |
| 325 | * image has been created *or* put the platform into the normal operation |
| 326 | * mode after the hibernation (the same method is executed in both cases). |
| 327 | * Called right after the nonboot CPUs have been enabled and before |
| 328 | * thawing devices (runs with IRQs on). |
| 329 | * |
| 330 | * @prepare: Prepare the platform for entering the low power state. |
| 331 | * Called right after the hibernation image has been saved and before |
| 332 | * devices are prepared for entering the low power state. |
| 333 | * |
| 334 | * @enter: Put the system into the low power state after the hibernation image |
| 335 | * has been saved to disk. |
| 336 | * Called after the nonboot CPUs have been disabled and all of the low |
| 337 | * level devices have been shut down (runs with IRQs off). |
| 338 | * |
Rafael J. Wysocki | c7e0831 | 2007-10-18 03:04:55 -0700 | [diff] [blame] | 339 | * @leave: Perform the first stage of the cleanup after the system sleep state |
| 340 | * indicated by @set_target() has been left. |
| 341 | * Called right after the control has been passed from the boot kernel to |
| 342 | * the image kernel, before the nonboot CPUs are enabled and before devices |
| 343 | * are resumed. Executed with interrupts disabled. |
| 344 | * |
Rafael J. Wysocki | 74f270a | 2007-10-18 03:04:42 -0700 | [diff] [blame] | 345 | * @pre_restore: Prepare system for the restoration from a hibernation image. |
| 346 | * Called right after devices have been frozen and before the nonboot |
| 347 | * CPUs are disabled (runs with IRQs on). |
| 348 | * |
| 349 | * @restore_cleanup: Clean up after a failing image restoration. |
| 350 | * Called right after the nonboot CPUs have been enabled and before |
| 351 | * thawing devices (runs with IRQs on). |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 352 | * |
| 353 | * @recover: Recover the platform from a failure to suspend devices. |
| 354 | * Called by the PM core if the suspending of devices during hibernation |
| 355 | * fails. This callback is optional and should only be implemented by |
| 356 | * platforms which require special recovery actions in that situation. |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 357 | */ |
Rafael J. Wysocki | b3dac3b | 2007-10-18 03:04:43 -0700 | [diff] [blame] | 358 | struct platform_hibernation_ops { |
Rafael J. Wysocki | caea99e | 2008-01-08 00:08:44 +0100 | [diff] [blame] | 359 | int (*begin)(void); |
| 360 | void (*end)(void); |
Rafael J. Wysocki | 74f270a | 2007-10-18 03:04:42 -0700 | [diff] [blame] | 361 | int (*pre_snapshot)(void); |
| 362 | void (*finish)(void); |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 363 | int (*prepare)(void); |
| 364 | int (*enter)(void); |
Rafael J. Wysocki | c7e0831 | 2007-10-18 03:04:55 -0700 | [diff] [blame] | 365 | void (*leave)(void); |
Rafael J. Wysocki | a634cc1 | 2007-07-19 01:47:30 -0700 | [diff] [blame] | 366 | int (*pre_restore)(void); |
| 367 | void (*restore_cleanup)(void); |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 368 | void (*recover)(void); |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 369 | }; |
| 370 | |
Rafael J. Wysocki | b0cb1a1 | 2007-07-29 23:24:36 +0200 | [diff] [blame] | 371 | #ifdef CONFIG_HIBERNATION |
Rafael J. Wysocki | 74dfd66 | 2007-05-06 14:50:43 -0700 | [diff] [blame] | 372 | /* kernel/power/snapshot.c */ |
Johannes Berg | 940d67f | 2007-05-08 19:23:49 +1000 | [diff] [blame] | 373 | extern void __register_nosave_region(unsigned long b, unsigned long e, int km); |
Marcin Slusarz | ce289e8 | 2008-08-15 00:40:19 -0700 | [diff] [blame] | 374 | static inline void __init register_nosave_region(unsigned long b, unsigned long e) |
Johannes Berg | 940d67f | 2007-05-08 19:23:49 +1000 | [diff] [blame] | 375 | { |
| 376 | __register_nosave_region(b, e, 0); |
| 377 | } |
Marcin Slusarz | ce289e8 | 2008-08-15 00:40:19 -0700 | [diff] [blame] | 378 | static inline void __init register_nosave_region_late(unsigned long b, unsigned long e) |
Johannes Berg | 940d67f | 2007-05-08 19:23:49 +1000 | [diff] [blame] | 379 | { |
| 380 | __register_nosave_region(b, e, 1); |
| 381 | } |
Rafael J. Wysocki | 74dfd66 | 2007-05-06 14:50:43 -0700 | [diff] [blame] | 382 | extern int swsusp_page_is_forbidden(struct page *); |
| 383 | extern void swsusp_set_page_free(struct page *); |
| 384 | extern void swsusp_unset_page_free(struct page *); |
| 385 | extern unsigned long get_safe_page(gfp_t gfp_mask); |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 386 | |
Lionel Debroux | 073ef1f | 2010-11-09 21:48:49 +0100 | [diff] [blame] | 387 | extern void hibernation_set_ops(const struct platform_hibernation_ops *ops); |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 388 | extern int hibernate(void); |
Rafael J. Wysocki | abfe2d7 | 2009-01-19 20:54:54 +0100 | [diff] [blame] | 389 | extern bool system_entering_hibernation(void); |
Kees Cook | a6e15a3 | 2014-06-13 13:30:35 -0700 | [diff] [blame] | 390 | extern bool hibernation_available(void); |
Sebastian Capella | 603fb42 | 2014-03-25 01:20:29 +0100 | [diff] [blame] | 391 | asmlinkage int swsusp_save(void); |
| 392 | extern struct pbe *restore_pblist; |
Rafael J. Wysocki | b0cb1a1 | 2007-07-29 23:24:36 +0200 | [diff] [blame] | 393 | #else /* CONFIG_HIBERNATION */ |
Rafael J. Wysocki | 1f112ce | 2011-04-11 22:54:42 +0200 | [diff] [blame] | 394 | static inline void register_nosave_region(unsigned long b, unsigned long e) {} |
| 395 | static inline void register_nosave_region_late(unsigned long b, unsigned long e) {} |
Rafael J. Wysocki | 74dfd66 | 2007-05-06 14:50:43 -0700 | [diff] [blame] | 396 | static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } |
| 397 | static inline void swsusp_set_page_free(struct page *p) {} |
| 398 | static inline void swsusp_unset_page_free(struct page *p) {} |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 399 | |
Lionel Debroux | 073ef1f | 2010-11-09 21:48:49 +0100 | [diff] [blame] | 400 | static inline void hibernation_set_ops(const struct platform_hibernation_ops *ops) {} |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 401 | static inline int hibernate(void) { return -ENOSYS; } |
Cornelia Huck | fce2b111 | 2009-06-10 01:28:19 +0200 | [diff] [blame] | 402 | static inline bool system_entering_hibernation(void) { return false; } |
Kees Cook | a6e15a3 | 2014-06-13 13:30:35 -0700 | [diff] [blame] | 403 | static inline bool hibernation_available(void) { return false; } |
Cornelia Huck | fce2b111 | 2009-06-10 01:28:19 +0200 | [diff] [blame] | 404 | #endif /* CONFIG_HIBERNATION */ |
| 405 | |
Amerigo Wang | 35eb6db | 2011-07-25 17:13:11 -0700 | [diff] [blame] | 406 | /* Hibernation and suspend events */ |
| 407 | #define PM_HIBERNATION_PREPARE 0x0001 /* Going to hibernate */ |
| 408 | #define PM_POST_HIBERNATION 0x0002 /* Hibernation finished */ |
| 409 | #define PM_SUSPEND_PREPARE 0x0003 /* Going to suspend the system */ |
| 410 | #define PM_POST_SUSPEND 0x0004 /* Suspend finished */ |
| 411 | #define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */ |
| 412 | #define PM_POST_RESTORE 0x0006 /* Restore failed */ |
| 413 | |
Srivatsa S. Bhat | 9b6fc5d | 2011-12-06 23:24:38 +0100 | [diff] [blame] | 414 | extern struct mutex pm_mutex; |
| 415 | |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 416 | #ifdef CONFIG_PM_SLEEP |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | void save_processor_state(void); |
| 418 | void restore_processor_state(void); |
Rafael J. Wysocki | 25761b6 | 2005-10-30 14:59:56 -0800 | [diff] [blame] | 419 | |
Rafael J. Wysocki | b10d911 | 2007-07-19 01:47:36 -0700 | [diff] [blame] | 420 | /* kernel/power/main.c */ |
Alan Stern | 8252575 | 2007-11-19 23:49:18 +0100 | [diff] [blame] | 421 | extern int register_pm_notifier(struct notifier_block *nb); |
| 422 | extern int unregister_pm_notifier(struct notifier_block *nb); |
Rafael J. Wysocki | b10d911 | 2007-07-19 01:47:36 -0700 | [diff] [blame] | 423 | |
| 424 | #define pm_notifier(fn, pri) { \ |
| 425 | static struct notifier_block fn##_nb = \ |
| 426 | { .notifier_call = fn, .priority = pri }; \ |
| 427 | register_pm_notifier(&fn##_nb); \ |
| 428 | } |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 429 | |
| 430 | /* drivers/base/power/wakeup.c */ |
| 431 | extern bool events_check_enabled; |
Alexandra Yates | a6f5f0d | 2015-09-15 10:32:46 -0700 | [diff] [blame] | 432 | extern unsigned int pm_wakeup_irq; |
Florian Fainelli | bd8c9ba | 2017-07-17 17:19:25 -0700 | [diff] [blame] | 433 | extern suspend_state_t pm_suspend_target_state; |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 434 | |
Rafael J. Wysocki | a2867e0 | 2010-12-03 22:58:31 +0100 | [diff] [blame] | 435 | extern bool pm_wakeup_pending(void); |
Rafael J. Wysocki | 068765b | 2014-09-01 13:47:49 +0200 | [diff] [blame] | 436 | extern void pm_system_wakeup(void); |
Rafael J. Wysocki | 33e4f80 | 2017-06-12 22:56:34 +0200 | [diff] [blame] | 437 | extern void pm_system_cancel_wakeup(void); |
| 438 | extern void pm_wakeup_clear(bool reset); |
Alexandra Yates | a6f5f0d | 2015-09-15 10:32:46 -0700 | [diff] [blame] | 439 | extern void pm_system_irq_wakeup(unsigned int irq_number); |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 440 | extern bool pm_get_wakeup_count(unsigned int *count, bool block); |
Rafael J. Wysocki | 074037e | 2010-09-22 22:09:10 +0200 | [diff] [blame] | 441 | extern bool pm_save_wakeup_count(unsigned int count); |
Rafael J. Wysocki | 5585094 | 2012-04-29 22:53:32 +0200 | [diff] [blame] | 442 | extern void pm_wakep_autosleep_enabled(bool set); |
Julius Werner | bb177fe | 2013-06-12 12:55:22 -0700 | [diff] [blame] | 443 | extern void pm_print_active_wakeup_sources(void); |
Srivatsa S. Bhat | 9b6fc5d | 2011-12-06 23:24:38 +0100 | [diff] [blame] | 444 | |
| 445 | static inline void lock_system_sleep(void) |
| 446 | { |
Srivatsa S. Bhat | 7208162 | 2012-01-19 23:25:33 +0100 | [diff] [blame] | 447 | current->flags |= PF_FREEZER_SKIP; |
Srivatsa S. Bhat | 9b6fc5d | 2011-12-06 23:24:38 +0100 | [diff] [blame] | 448 | mutex_lock(&pm_mutex); |
| 449 | } |
| 450 | |
| 451 | static inline void unlock_system_sleep(void) |
| 452 | { |
Srivatsa S. Bhat | 7208162 | 2012-01-19 23:25:33 +0100 | [diff] [blame] | 453 | /* |
| 454 | * Don't use freezer_count() because we don't want the call to |
| 455 | * try_to_freeze() here. |
| 456 | * |
| 457 | * Reason: |
| 458 | * Fundamentally, we just don't need it, because freezing condition |
| 459 | * doesn't come into effect until we release the pm_mutex lock, |
| 460 | * since the freezer always works with pm_mutex held. |
| 461 | * |
| 462 | * More importantly, in the case of hibernation, |
| 463 | * unlock_system_sleep() gets called in snapshot_read() and |
| 464 | * snapshot_write() when the freezing condition is still in effect. |
| 465 | * Which means, if we use try_to_freeze() here, it would make them |
| 466 | * enter the refrigerator, thus causing hibernation to lockup. |
| 467 | */ |
| 468 | current->flags &= ~PF_FREEZER_SKIP; |
Srivatsa S. Bhat | 9b6fc5d | 2011-12-06 23:24:38 +0100 | [diff] [blame] | 469 | mutex_unlock(&pm_mutex); |
Srivatsa S. Bhat | 9b6fc5d | 2011-12-06 23:24:38 +0100 | [diff] [blame] | 470 | } |
| 471 | |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 472 | #else /* !CONFIG_PM_SLEEP */ |
Rafael J. Wysocki | b10d911 | 2007-07-19 01:47:36 -0700 | [diff] [blame] | 473 | |
| 474 | static inline int register_pm_notifier(struct notifier_block *nb) |
| 475 | { |
| 476 | return 0; |
| 477 | } |
| 478 | |
| 479 | static inline int unregister_pm_notifier(struct notifier_block *nb) |
| 480 | { |
| 481 | return 0; |
| 482 | } |
| 483 | |
| 484 | #define pm_notifier(fn, pri) do { (void)(fn); } while (0) |
Rafael J. Wysocki | dbeeec5 | 2010-10-04 22:07:32 +0200 | [diff] [blame] | 485 | |
Rafael J. Wysocki | a2867e0 | 2010-12-03 22:58:31 +0100 | [diff] [blame] | 486 | static inline bool pm_wakeup_pending(void) { return false; } |
Rafael J. Wysocki | 068765b | 2014-09-01 13:47:49 +0200 | [diff] [blame] | 487 | static inline void pm_system_wakeup(void) {} |
Rafael J. Wysocki | 33e4f80 | 2017-06-12 22:56:34 +0200 | [diff] [blame] | 488 | static inline void pm_wakeup_clear(bool reset) {} |
Alexandra Yates | a6f5f0d | 2015-09-15 10:32:46 -0700 | [diff] [blame] | 489 | static inline void pm_system_irq_wakeup(unsigned int irq_number) {} |
Rafael J. Wysocki | b10d911 | 2007-07-19 01:47:36 -0700 | [diff] [blame] | 490 | |
Andi Kleen | 6ad696d | 2009-11-17 14:06:22 -0800 | [diff] [blame] | 491 | static inline void lock_system_sleep(void) {} |
| 492 | static inline void unlock_system_sleep(void) {} |
| 493 | |
Srivatsa S. Bhat | 9b6fc5d | 2011-12-06 23:24:38 +0100 | [diff] [blame] | 494 | #endif /* !CONFIG_PM_SLEEP */ |
Huang Ying | 89081d1 | 2008-07-25 19:45:10 -0700 | [diff] [blame] | 495 | |
Rafael J. Wysocki | b2df1d4 | 2012-06-21 00:19:33 +0200 | [diff] [blame] | 496 | #ifdef CONFIG_PM_SLEEP_DEBUG |
| 497 | extern bool pm_print_times_enabled; |
Srinivas Pandruvada | 726fb6b | 2017-08-15 18:16:59 -0700 | [diff] [blame] | 498 | extern bool pm_debug_messages_on; |
Rafael J. Wysocki | cb08e03 | 2017-07-23 00:03:43 +0200 | [diff] [blame] | 499 | extern __printf(2, 3) void __pm_pr_dbg(bool defer, const char *fmt, ...); |
Rafael J. Wysocki | b2df1d4 | 2012-06-21 00:19:33 +0200 | [diff] [blame] | 500 | #else |
| 501 | #define pm_print_times_enabled (false) |
Srinivas Pandruvada | 726fb6b | 2017-08-15 18:16:59 -0700 | [diff] [blame] | 502 | #define pm_debug_messages_on (false) |
Rafael J. Wysocki | 8d8b244 | 2017-07-19 02:38:44 +0200 | [diff] [blame] | 503 | |
| 504 | #include <linux/printk.h> |
| 505 | |
Rafael J. Wysocki | cb08e03 | 2017-07-23 00:03:43 +0200 | [diff] [blame] | 506 | #define __pm_pr_dbg(defer, fmt, ...) \ |
Rafael J. Wysocki | 8d8b244 | 2017-07-19 02:38:44 +0200 | [diff] [blame] | 507 | no_printk(KERN_DEBUG fmt, ##__VA_ARGS__) |
Rafael J. Wysocki | b2df1d4 | 2012-06-21 00:19:33 +0200 | [diff] [blame] | 508 | #endif |
| 509 | |
Rafael J. Wysocki | cb08e03 | 2017-07-23 00:03:43 +0200 | [diff] [blame] | 510 | #define pm_pr_dbg(fmt, ...) \ |
| 511 | __pm_pr_dbg(false, fmt, ##__VA_ARGS__) |
| 512 | |
| 513 | #define pm_deferred_pr_dbg(fmt, ...) \ |
| 514 | __pm_pr_dbg(true, fmt, ##__VA_ARGS__) |
| 515 | |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 516 | #ifdef CONFIG_PM_AUTOSLEEP |
| 517 | |
| 518 | /* kernel/power/autosleep.c */ |
| 519 | void queue_up_suspend_work(void); |
| 520 | |
| 521 | #else /* !CONFIG_PM_AUTOSLEEP */ |
| 522 | |
| 523 | static inline void queue_up_suspend_work(void) {} |
| 524 | |
| 525 | #endif /* !CONFIG_PM_AUTOSLEEP */ |
| 526 | |
Martin Schwidefsky | 85055dd | 2011-08-17 20:42:24 +0200 | [diff] [blame] | 527 | #ifdef CONFIG_ARCH_SAVE_PAGE_KEYS |
| 528 | /* |
| 529 | * The ARCH_SAVE_PAGE_KEYS functions can be used by an architecture |
| 530 | * to save/restore additional information to/from the array of page |
| 531 | * frame numbers in the hibernation image. For s390 this is used to |
| 532 | * save and restore the storage key for each page that is included |
| 533 | * in the hibernation image. |
| 534 | */ |
| 535 | unsigned long page_key_additional_pages(unsigned long pages); |
| 536 | int page_key_alloc(unsigned long pages); |
| 537 | void page_key_free(void); |
| 538 | void page_key_read(unsigned long *pfn); |
| 539 | void page_key_memorize(unsigned long *pfn); |
| 540 | void page_key_write(void *address); |
| 541 | |
| 542 | #else /* !CONFIG_ARCH_SAVE_PAGE_KEYS */ |
| 543 | |
| 544 | static inline unsigned long page_key_additional_pages(unsigned long pages) |
| 545 | { |
| 546 | return 0; |
| 547 | } |
| 548 | |
| 549 | static inline int page_key_alloc(unsigned long pages) |
| 550 | { |
| 551 | return 0; |
| 552 | } |
| 553 | |
| 554 | static inline void page_key_free(void) {} |
| 555 | static inline void page_key_read(unsigned long *pfn) {} |
| 556 | static inline void page_key_memorize(unsigned long *pfn) {} |
| 557 | static inline void page_key_write(void *address) {} |
| 558 | |
| 559 | #endif /* !CONFIG_ARCH_SAVE_PAGE_KEYS */ |
| 560 | |
Rafael J. Wysocki | 95d9ffb | 2007-10-18 03:04:39 -0700 | [diff] [blame] | 561 | #endif /* _LINUX_SUSPEND_H */ |