Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * kernel/power/main.c - PM subsystem core functionality. |
| 3 | * |
| 4 | * Copyright (c) 2003 Patrick Mochel |
| 5 | * Copyright (c) 2003 Open Source Development Lab |
Srivatsa S. Bhat | 341d416 | 2011-11-19 14:39:01 +0100 | [diff] [blame] | 6 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * This file is released under the GPLv2 |
| 8 | * |
| 9 | */ |
| 10 | |
Paul Gortmaker | 6e5fdee | 2011-05-26 16:00:52 -0400 | [diff] [blame] | 11 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/kobject.h> |
| 13 | #include <linux/string.h> |
Zhonghui Fu | 431d452 | 2015-03-18 15:54:27 +0100 | [diff] [blame] | 14 | #include <linux/pm-trace.h> |
Rafael J. Wysocki | 5e928f7 | 2009-08-18 23:38:32 +0200 | [diff] [blame] | 15 | #include <linux/workqueue.h> |
ShuoX Liu | 2a77c46 | 2011-08-10 23:01:26 +0200 | [diff] [blame] | 16 | #include <linux/debugfs.h> |
| 17 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
| 19 | #include "power.h" |
| 20 | |
Stephen Hemminger | a6d7098 | 2006-12-06 20:34:35 -0800 | [diff] [blame] | 21 | DEFINE_MUTEX(pm_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
Rafael J. Wysocki | cd51e61c | 2011-02-11 00:04:52 +0100 | [diff] [blame] | 23 | #ifdef CONFIG_PM_SLEEP |
| 24 | |
Bart Van Assche | 4bf236a | 2018-01-05 09:19:08 -0800 | [diff] [blame] | 25 | void lock_system_sleep(void) |
| 26 | { |
| 27 | current->flags |= PF_FREEZER_SKIP; |
| 28 | mutex_lock(&pm_mutex); |
| 29 | } |
| 30 | EXPORT_SYMBOL_GPL(lock_system_sleep); |
| 31 | |
| 32 | void unlock_system_sleep(void) |
| 33 | { |
| 34 | /* |
| 35 | * Don't use freezer_count() because we don't want the call to |
| 36 | * try_to_freeze() here. |
| 37 | * |
| 38 | * Reason: |
| 39 | * Fundamentally, we just don't need it, because freezing condition |
| 40 | * doesn't come into effect until we release the pm_mutex lock, |
| 41 | * since the freezer always works with pm_mutex held. |
| 42 | * |
| 43 | * More importantly, in the case of hibernation, |
| 44 | * unlock_system_sleep() gets called in snapshot_read() and |
| 45 | * snapshot_write() when the freezing condition is still in effect. |
| 46 | * Which means, if we use try_to_freeze() here, it would make them |
| 47 | * enter the refrigerator, thus causing hibernation to lockup. |
| 48 | */ |
| 49 | current->flags &= ~PF_FREEZER_SKIP; |
| 50 | mutex_unlock(&pm_mutex); |
| 51 | } |
| 52 | EXPORT_SYMBOL_GPL(unlock_system_sleep); |
| 53 | |
Alan Stern | 8252575 | 2007-11-19 23:49:18 +0100 | [diff] [blame] | 54 | /* Routines for PM-transition notifications */ |
| 55 | |
| 56 | static BLOCKING_NOTIFIER_HEAD(pm_chain_head); |
| 57 | |
| 58 | int register_pm_notifier(struct notifier_block *nb) |
| 59 | { |
| 60 | return blocking_notifier_chain_register(&pm_chain_head, nb); |
| 61 | } |
| 62 | EXPORT_SYMBOL_GPL(register_pm_notifier); |
| 63 | |
| 64 | int unregister_pm_notifier(struct notifier_block *nb) |
| 65 | { |
| 66 | return blocking_notifier_chain_unregister(&pm_chain_head, nb); |
| 67 | } |
| 68 | EXPORT_SYMBOL_GPL(unregister_pm_notifier); |
| 69 | |
Lianwei Wang | ea00f4f | 2016-06-19 23:52:27 -0700 | [diff] [blame] | 70 | int __pm_notifier_call_chain(unsigned long val, int nr_to_call, int *nr_calls) |
Alan Stern | 8252575 | 2007-11-19 23:49:18 +0100 | [diff] [blame] | 71 | { |
Lianwei Wang | ea00f4f | 2016-06-19 23:52:27 -0700 | [diff] [blame] | 72 | int ret; |
| 73 | |
| 74 | ret = __blocking_notifier_call_chain(&pm_chain_head, val, NULL, |
| 75 | nr_to_call, nr_calls); |
Akinobu Mita | f0c077a | 2011-07-08 20:53:36 +0200 | [diff] [blame] | 76 | |
| 77 | return notifier_to_errno(ret); |
Alan Stern | 8252575 | 2007-11-19 23:49:18 +0100 | [diff] [blame] | 78 | } |
Lianwei Wang | ea00f4f | 2016-06-19 23:52:27 -0700 | [diff] [blame] | 79 | int pm_notifier_call_chain(unsigned long val) |
| 80 | { |
| 81 | return __pm_notifier_call_chain(val, -1, NULL); |
| 82 | } |
Alan Stern | 8252575 | 2007-11-19 23:49:18 +0100 | [diff] [blame] | 83 | |
Rafael J. Wysocki | 0e06b4a | 2010-01-23 22:25:15 +0100 | [diff] [blame] | 84 | /* If set, devices may be suspended and resumed asynchronously. */ |
| 85 | int pm_async_enabled = 1; |
| 86 | |
| 87 | static ssize_t pm_async_show(struct kobject *kobj, struct kobj_attribute *attr, |
| 88 | char *buf) |
| 89 | { |
| 90 | return sprintf(buf, "%d\n", pm_async_enabled); |
| 91 | } |
| 92 | |
| 93 | static ssize_t pm_async_store(struct kobject *kobj, struct kobj_attribute *attr, |
| 94 | const char *buf, size_t n) |
| 95 | { |
| 96 | unsigned long val; |
| 97 | |
Daniel Walter | 883ee4f | 2012-10-23 01:20:35 +0200 | [diff] [blame] | 98 | if (kstrtoul(buf, 10, &val)) |
Rafael J. Wysocki | 0e06b4a | 2010-01-23 22:25:15 +0100 | [diff] [blame] | 99 | return -EINVAL; |
| 100 | |
| 101 | if (val > 1) |
| 102 | return -EINVAL; |
| 103 | |
| 104 | pm_async_enabled = val; |
| 105 | return n; |
| 106 | } |
| 107 | |
| 108 | power_attr(pm_async); |
| 109 | |
Rafael J. Wysocki | 406e793 | 2016-11-21 22:45:40 +0100 | [diff] [blame] | 110 | #ifdef CONFIG_SUSPEND |
| 111 | static ssize_t mem_sleep_show(struct kobject *kobj, struct kobj_attribute *attr, |
| 112 | char *buf) |
| 113 | { |
| 114 | char *s = buf; |
| 115 | suspend_state_t i; |
| 116 | |
| 117 | for (i = PM_SUSPEND_MIN; i < PM_SUSPEND_MAX; i++) |
| 118 | if (mem_sleep_states[i]) { |
| 119 | const char *label = mem_sleep_states[i]; |
| 120 | |
| 121 | if (mem_sleep_current == i) |
| 122 | s += sprintf(s, "[%s] ", label); |
| 123 | else |
| 124 | s += sprintf(s, "%s ", label); |
| 125 | } |
| 126 | |
| 127 | /* Convert the last space to a newline if needed. */ |
| 128 | if (s != buf) |
| 129 | *(s-1) = '\n'; |
| 130 | |
| 131 | return (s - buf); |
| 132 | } |
| 133 | |
| 134 | static suspend_state_t decode_suspend_state(const char *buf, size_t n) |
| 135 | { |
| 136 | suspend_state_t state; |
| 137 | char *p; |
| 138 | int len; |
| 139 | |
| 140 | p = memchr(buf, '\n', n); |
| 141 | len = p ? p - buf : n; |
| 142 | |
| 143 | for (state = PM_SUSPEND_MIN; state < PM_SUSPEND_MAX; state++) { |
| 144 | const char *label = mem_sleep_states[state]; |
| 145 | |
| 146 | if (label && len == strlen(label) && !strncmp(buf, label, len)) |
| 147 | return state; |
| 148 | } |
| 149 | |
| 150 | return PM_SUSPEND_ON; |
| 151 | } |
| 152 | |
| 153 | static ssize_t mem_sleep_store(struct kobject *kobj, struct kobj_attribute *attr, |
| 154 | const char *buf, size_t n) |
| 155 | { |
| 156 | suspend_state_t state; |
| 157 | int error; |
| 158 | |
| 159 | error = pm_autosleep_lock(); |
| 160 | if (error) |
| 161 | return error; |
| 162 | |
| 163 | if (pm_autosleep_state() > PM_SUSPEND_ON) { |
| 164 | error = -EBUSY; |
| 165 | goto out; |
| 166 | } |
| 167 | |
| 168 | state = decode_suspend_state(buf, n); |
| 169 | if (state < PM_SUSPEND_MAX && state > PM_SUSPEND_ON) |
| 170 | mem_sleep_current = state; |
| 171 | else |
| 172 | error = -EINVAL; |
| 173 | |
| 174 | out: |
| 175 | pm_autosleep_unlock(); |
| 176 | return error ? error : n; |
| 177 | } |
| 178 | |
| 179 | power_attr(mem_sleep); |
| 180 | #endif /* CONFIG_SUSPEND */ |
| 181 | |
Rafael J. Wysocki | e516a1d | 2017-07-21 14:44:02 +0200 | [diff] [blame] | 182 | #ifdef CONFIG_PM_SLEEP_DEBUG |
Rafael J. Wysocki | 0e7d56e | 2007-11-19 23:41:19 +0100 | [diff] [blame] | 183 | int pm_test_level = TEST_NONE; |
| 184 | |
Rafael J. Wysocki | 0e7d56e | 2007-11-19 23:41:19 +0100 | [diff] [blame] | 185 | static const char * const pm_tests[__TEST_AFTER_LAST] = { |
| 186 | [TEST_NONE] = "none", |
| 187 | [TEST_CORE] = "core", |
| 188 | [TEST_CPUS] = "processors", |
| 189 | [TEST_PLATFORM] = "platform", |
| 190 | [TEST_DEVICES] = "devices", |
| 191 | [TEST_FREEZER] = "freezer", |
| 192 | }; |
| 193 | |
Rafael J. Wysocki | 039a75c | 2008-01-29 00:29:06 +0100 | [diff] [blame] | 194 | static ssize_t pm_test_show(struct kobject *kobj, struct kobj_attribute *attr, |
| 195 | char *buf) |
Rafael J. Wysocki | 0e7d56e | 2007-11-19 23:41:19 +0100 | [diff] [blame] | 196 | { |
| 197 | char *s = buf; |
| 198 | int level; |
| 199 | |
| 200 | for (level = TEST_FIRST; level <= TEST_MAX; level++) |
| 201 | if (pm_tests[level]) { |
| 202 | if (level == pm_test_level) |
| 203 | s += sprintf(s, "[%s] ", pm_tests[level]); |
| 204 | else |
| 205 | s += sprintf(s, "%s ", pm_tests[level]); |
| 206 | } |
| 207 | |
| 208 | if (s != buf) |
| 209 | /* convert the last space to a newline */ |
| 210 | *(s-1) = '\n'; |
| 211 | |
| 212 | return (s - buf); |
| 213 | } |
| 214 | |
Rafael J. Wysocki | 039a75c | 2008-01-29 00:29:06 +0100 | [diff] [blame] | 215 | static ssize_t pm_test_store(struct kobject *kobj, struct kobj_attribute *attr, |
| 216 | const char *buf, size_t n) |
Rafael J. Wysocki | 0e7d56e | 2007-11-19 23:41:19 +0100 | [diff] [blame] | 217 | { |
| 218 | const char * const *s; |
| 219 | int level; |
| 220 | char *p; |
| 221 | int len; |
| 222 | int error = -EINVAL; |
| 223 | |
| 224 | p = memchr(buf, '\n', n); |
| 225 | len = p ? p - buf : n; |
| 226 | |
Srivatsa S. Bhat | bcda53f | 2011-12-07 22:29:54 +0100 | [diff] [blame] | 227 | lock_system_sleep(); |
Rafael J. Wysocki | 0e7d56e | 2007-11-19 23:41:19 +0100 | [diff] [blame] | 228 | |
| 229 | level = TEST_FIRST; |
| 230 | for (s = &pm_tests[level]; level <= TEST_MAX; s++, level++) |
| 231 | if (*s && len == strlen(*s) && !strncmp(buf, *s, len)) { |
| 232 | pm_test_level = level; |
| 233 | error = 0; |
| 234 | break; |
| 235 | } |
| 236 | |
Srivatsa S. Bhat | bcda53f | 2011-12-07 22:29:54 +0100 | [diff] [blame] | 237 | unlock_system_sleep(); |
Rafael J. Wysocki | 0e7d56e | 2007-11-19 23:41:19 +0100 | [diff] [blame] | 238 | |
| 239 | return error ? error : n; |
| 240 | } |
| 241 | |
| 242 | power_attr(pm_test); |
Rafael J. Wysocki | e516a1d | 2017-07-21 14:44:02 +0200 | [diff] [blame] | 243 | #endif /* CONFIG_PM_SLEEP_DEBUG */ |
Rafael J. Wysocki | 0e7d56e | 2007-11-19 23:41:19 +0100 | [diff] [blame] | 244 | |
ShuoX Liu | 2a77c46 | 2011-08-10 23:01:26 +0200 | [diff] [blame] | 245 | #ifdef CONFIG_DEBUG_FS |
| 246 | static char *suspend_step_name(enum suspend_stat_step step) |
| 247 | { |
| 248 | switch (step) { |
| 249 | case SUSPEND_FREEZE: |
| 250 | return "freeze"; |
| 251 | case SUSPEND_PREPARE: |
| 252 | return "prepare"; |
| 253 | case SUSPEND_SUSPEND: |
| 254 | return "suspend"; |
| 255 | case SUSPEND_SUSPEND_NOIRQ: |
| 256 | return "suspend_noirq"; |
| 257 | case SUSPEND_RESUME_NOIRQ: |
| 258 | return "resume_noirq"; |
| 259 | case SUSPEND_RESUME: |
| 260 | return "resume"; |
| 261 | default: |
| 262 | return ""; |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | static int suspend_stats_show(struct seq_file *s, void *unused) |
| 267 | { |
| 268 | int i, index, last_dev, last_errno, last_step; |
| 269 | |
| 270 | last_dev = suspend_stats.last_failed_dev + REC_FAILED_NUM - 1; |
| 271 | last_dev %= REC_FAILED_NUM; |
| 272 | last_errno = suspend_stats.last_failed_errno + REC_FAILED_NUM - 1; |
| 273 | last_errno %= REC_FAILED_NUM; |
| 274 | last_step = suspend_stats.last_failed_step + REC_FAILED_NUM - 1; |
| 275 | last_step %= REC_FAILED_NUM; |
Rafael J. Wysocki | cf579df | 2012-01-29 20:38:29 +0100 | [diff] [blame] | 276 | seq_printf(s, "%s: %d\n%s: %d\n%s: %d\n%s: %d\n%s: %d\n" |
| 277 | "%s: %d\n%s: %d\n%s: %d\n%s: %d\n%s: %d\n", |
ShuoX Liu | 2a77c46 | 2011-08-10 23:01:26 +0200 | [diff] [blame] | 278 | "success", suspend_stats.success, |
| 279 | "fail", suspend_stats.fail, |
| 280 | "failed_freeze", suspend_stats.failed_freeze, |
| 281 | "failed_prepare", suspend_stats.failed_prepare, |
| 282 | "failed_suspend", suspend_stats.failed_suspend, |
Rafael J. Wysocki | cf579df | 2012-01-29 20:38:29 +0100 | [diff] [blame] | 283 | "failed_suspend_late", |
| 284 | suspend_stats.failed_suspend_late, |
ShuoX Liu | 2a77c46 | 2011-08-10 23:01:26 +0200 | [diff] [blame] | 285 | "failed_suspend_noirq", |
| 286 | suspend_stats.failed_suspend_noirq, |
| 287 | "failed_resume", suspend_stats.failed_resume, |
Rafael J. Wysocki | cf579df | 2012-01-29 20:38:29 +0100 | [diff] [blame] | 288 | "failed_resume_early", |
| 289 | suspend_stats.failed_resume_early, |
ShuoX Liu | 2a77c46 | 2011-08-10 23:01:26 +0200 | [diff] [blame] | 290 | "failed_resume_noirq", |
| 291 | suspend_stats.failed_resume_noirq); |
| 292 | seq_printf(s, "failures:\n last_failed_dev:\t%-s\n", |
| 293 | suspend_stats.failed_devs[last_dev]); |
| 294 | for (i = 1; i < REC_FAILED_NUM; i++) { |
| 295 | index = last_dev + REC_FAILED_NUM - i; |
| 296 | index %= REC_FAILED_NUM; |
| 297 | seq_printf(s, "\t\t\t%-s\n", |
| 298 | suspend_stats.failed_devs[index]); |
| 299 | } |
| 300 | seq_printf(s, " last_failed_errno:\t%-d\n", |
| 301 | suspend_stats.errno[last_errno]); |
| 302 | for (i = 1; i < REC_FAILED_NUM; i++) { |
| 303 | index = last_errno + REC_FAILED_NUM - i; |
| 304 | index %= REC_FAILED_NUM; |
| 305 | seq_printf(s, "\t\t\t%-d\n", |
| 306 | suspend_stats.errno[index]); |
| 307 | } |
| 308 | seq_printf(s, " last_failed_step:\t%-s\n", |
| 309 | suspend_step_name( |
| 310 | suspend_stats.failed_steps[last_step])); |
| 311 | for (i = 1; i < REC_FAILED_NUM; i++) { |
| 312 | index = last_step + REC_FAILED_NUM - i; |
| 313 | index %= REC_FAILED_NUM; |
| 314 | seq_printf(s, "\t\t\t%-s\n", |
| 315 | suspend_step_name( |
| 316 | suspend_stats.failed_steps[index])); |
| 317 | } |
| 318 | |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | static int suspend_stats_open(struct inode *inode, struct file *file) |
| 323 | { |
| 324 | return single_open(file, suspend_stats_show, NULL); |
| 325 | } |
| 326 | |
| 327 | static const struct file_operations suspend_stats_operations = { |
| 328 | .open = suspend_stats_open, |
| 329 | .read = seq_read, |
| 330 | .llseek = seq_lseek, |
| 331 | .release = single_release, |
| 332 | }; |
| 333 | |
| 334 | static int __init pm_debugfs_init(void) |
| 335 | { |
| 336 | debugfs_create_file("suspend_stats", S_IFREG | S_IRUGO, |
| 337 | NULL, NULL, &suspend_stats_operations); |
| 338 | return 0; |
| 339 | } |
| 340 | |
| 341 | late_initcall(pm_debugfs_init); |
| 342 | #endif /* CONFIG_DEBUG_FS */ |
| 343 | |
Rafael J. Wysocki | ca12310 | 2011-08-11 22:38:12 +0200 | [diff] [blame] | 344 | #endif /* CONFIG_PM_SLEEP */ |
| 345 | |
Rafael J. Wysocki | b2df1d4 | 2012-06-21 00:19:33 +0200 | [diff] [blame] | 346 | #ifdef CONFIG_PM_SLEEP_DEBUG |
| 347 | /* |
| 348 | * pm_print_times: print time taken by devices to suspend and resume. |
| 349 | * |
| 350 | * show() returns whether printing of suspend and resume times is enabled. |
| 351 | * store() accepts 0 or 1. 0 disables printing and 1 enables it. |
| 352 | */ |
| 353 | bool pm_print_times_enabled; |
| 354 | |
| 355 | static ssize_t pm_print_times_show(struct kobject *kobj, |
| 356 | struct kobj_attribute *attr, char *buf) |
| 357 | { |
| 358 | return sprintf(buf, "%d\n", pm_print_times_enabled); |
| 359 | } |
| 360 | |
| 361 | static ssize_t pm_print_times_store(struct kobject *kobj, |
| 362 | struct kobj_attribute *attr, |
| 363 | const char *buf, size_t n) |
| 364 | { |
| 365 | unsigned long val; |
| 366 | |
| 367 | if (kstrtoul(buf, 10, &val)) |
| 368 | return -EINVAL; |
| 369 | |
| 370 | if (val > 1) |
| 371 | return -EINVAL; |
| 372 | |
| 373 | pm_print_times_enabled = !!val; |
| 374 | return n; |
| 375 | } |
| 376 | |
| 377 | power_attr(pm_print_times); |
| 378 | |
| 379 | static inline void pm_print_times_init(void) |
| 380 | { |
| 381 | pm_print_times_enabled = !!initcall_debug; |
| 382 | } |
Alexandra Yates | a6f5f0d | 2015-09-15 10:32:46 -0700 | [diff] [blame] | 383 | |
| 384 | static ssize_t pm_wakeup_irq_show(struct kobject *kobj, |
| 385 | struct kobj_attribute *attr, |
| 386 | char *buf) |
| 387 | { |
| 388 | return pm_wakeup_irq ? sprintf(buf, "%u\n", pm_wakeup_irq) : -ENODATA; |
| 389 | } |
| 390 | |
Rafael J. Wysocki | a1e9ca6 | 2016-01-02 03:09:16 +0100 | [diff] [blame] | 391 | power_attr_ro(pm_wakeup_irq); |
Alexandra Yates | a6f5f0d | 2015-09-15 10:32:46 -0700 | [diff] [blame] | 392 | |
Srinivas Pandruvada | 726fb6b | 2017-08-15 18:16:59 -0700 | [diff] [blame] | 393 | bool pm_debug_messages_on __read_mostly; |
Rafael J. Wysocki | 8d8b244 | 2017-07-19 02:38:44 +0200 | [diff] [blame] | 394 | |
| 395 | static ssize_t pm_debug_messages_show(struct kobject *kobj, |
| 396 | struct kobj_attribute *attr, char *buf) |
| 397 | { |
| 398 | return sprintf(buf, "%d\n", pm_debug_messages_on); |
| 399 | } |
| 400 | |
| 401 | static ssize_t pm_debug_messages_store(struct kobject *kobj, |
| 402 | struct kobj_attribute *attr, |
| 403 | const char *buf, size_t n) |
| 404 | { |
| 405 | unsigned long val; |
| 406 | |
| 407 | if (kstrtoul(buf, 10, &val)) |
| 408 | return -EINVAL; |
| 409 | |
| 410 | if (val > 1) |
| 411 | return -EINVAL; |
| 412 | |
| 413 | pm_debug_messages_on = !!val; |
| 414 | return n; |
| 415 | } |
| 416 | |
| 417 | power_attr(pm_debug_messages); |
| 418 | |
| 419 | /** |
Rafael J. Wysocki | cb08e03 | 2017-07-23 00:03:43 +0200 | [diff] [blame] | 420 | * __pm_pr_dbg - Print a suspend debug message to the kernel log. |
| 421 | * @defer: Whether or not to use printk_deferred() to print the message. |
Rafael J. Wysocki | 8d8b244 | 2017-07-19 02:38:44 +0200 | [diff] [blame] | 422 | * @fmt: Message format. |
| 423 | * |
| 424 | * The message will be emitted if enabled through the pm_debug_messages |
| 425 | * sysfs attribute. |
| 426 | */ |
Rafael J. Wysocki | cb08e03 | 2017-07-23 00:03:43 +0200 | [diff] [blame] | 427 | void __pm_pr_dbg(bool defer, const char *fmt, ...) |
Rafael J. Wysocki | 8d8b244 | 2017-07-19 02:38:44 +0200 | [diff] [blame] | 428 | { |
| 429 | struct va_format vaf; |
| 430 | va_list args; |
| 431 | |
| 432 | if (!pm_debug_messages_on) |
| 433 | return; |
| 434 | |
| 435 | va_start(args, fmt); |
| 436 | |
| 437 | vaf.fmt = fmt; |
| 438 | vaf.va = &args; |
| 439 | |
Rafael J. Wysocki | cb08e03 | 2017-07-23 00:03:43 +0200 | [diff] [blame] | 440 | if (defer) |
| 441 | printk_deferred(KERN_DEBUG "PM: %pV", &vaf); |
| 442 | else |
| 443 | printk(KERN_DEBUG "PM: %pV", &vaf); |
Rafael J. Wysocki | 8d8b244 | 2017-07-19 02:38:44 +0200 | [diff] [blame] | 444 | |
| 445 | va_end(args); |
| 446 | } |
| 447 | |
Rafael J. Wysocki | 819b1bb | 2015-05-13 15:31:12 +0200 | [diff] [blame] | 448 | #else /* !CONFIG_PM_SLEEP_DEBUG */ |
Rafael J. Wysocki | b2df1d4 | 2012-06-21 00:19:33 +0200 | [diff] [blame] | 449 | static inline void pm_print_times_init(void) {} |
| 450 | #endif /* CONFIG_PM_SLEEP_DEBUG */ |
| 451 | |
Greg Kroah-Hartman | d76e15f | 2007-11-27 11:28:26 -0800 | [diff] [blame] | 452 | struct kobject *power_kobj; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | |
| 454 | /** |
Rafael J. Wysocki | 0399d4d | 2014-05-26 13:40:59 +0200 | [diff] [blame] | 455 | * state - control system sleep states. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | * |
Rafael J. Wysocki | 0399d4d | 2014-05-26 13:40:59 +0200 | [diff] [blame] | 457 | * show() returns available sleep state labels, which may be "mem", "standby", |
| 458 | * "freeze" and "disk" (hibernation). See Documentation/power/states.txt for a |
| 459 | * description of what they mean. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | * |
Rafael J. Wysocki | 0399d4d | 2014-05-26 13:40:59 +0200 | [diff] [blame] | 461 | * store() accepts one of those strings, translates it into the proper |
| 462 | * enumerated value, and initiates a suspend transition. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | */ |
Kay Sievers | 386f275 | 2007-11-02 13:47:53 +0100 | [diff] [blame] | 464 | static ssize_t state_show(struct kobject *kobj, struct kobj_attribute *attr, |
| 465 | char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | { |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 467 | char *s = buf; |
| 468 | #ifdef CONFIG_SUSPEND |
Rafael J. Wysocki | 27ddcc6 | 2014-05-26 13:40:47 +0200 | [diff] [blame] | 469 | suspend_state_t i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | |
Rafael J. Wysocki | 27ddcc6 | 2014-05-26 13:40:47 +0200 | [diff] [blame] | 471 | for (i = PM_SUSPEND_MIN; i < PM_SUSPEND_MAX; i++) |
Rafael J. Wysocki | d431cbc | 2014-07-15 22:02:11 +0200 | [diff] [blame] | 472 | if (pm_states[i]) |
| 473 | s += sprintf(s,"%s ", pm_states[i]); |
Rafael J. Wysocki | 27ddcc6 | 2014-05-26 13:40:47 +0200 | [diff] [blame] | 474 | |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 475 | #endif |
Kees Cook | a6e15a3 | 2014-06-13 13:30:35 -0700 | [diff] [blame] | 476 | if (hibernation_available()) |
| 477 | s += sprintf(s, "disk "); |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 478 | if (s != buf) |
| 479 | /* convert the last space to a newline */ |
| 480 | *(s-1) = '\n'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | return (s - buf); |
| 482 | } |
| 483 | |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 484 | static suspend_state_t decode_state(const char *buf, size_t n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | { |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 486 | #ifdef CONFIG_SUSPEND |
Rafael J. Wysocki | d431cbc | 2014-07-15 22:02:11 +0200 | [diff] [blame] | 487 | suspend_state_t state; |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 488 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | char *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | int len; |
| 491 | |
| 492 | p = memchr(buf, '\n', n); |
| 493 | len = p ? p - buf : n; |
| 494 | |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 495 | /* Check hibernation first. */ |
| 496 | if (len == 4 && !strncmp(buf, "disk", len)) |
| 497 | return PM_SUSPEND_MAX; |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 498 | |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 499 | #ifdef CONFIG_SUSPEND |
Rafael J. Wysocki | d431cbc | 2014-07-15 22:02:11 +0200 | [diff] [blame] | 500 | for (state = PM_SUSPEND_MIN; state < PM_SUSPEND_MAX; state++) { |
| 501 | const char *label = pm_states[state]; |
| 502 | |
| 503 | if (label && len == strlen(label) && !strncmp(buf, label, len)) |
| 504 | return state; |
| 505 | } |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 506 | #endif |
| 507 | |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 508 | return PM_SUSPEND_ON; |
| 509 | } |
| 510 | |
| 511 | static ssize_t state_store(struct kobject *kobj, struct kobj_attribute *attr, |
| 512 | const char *buf, size_t n) |
| 513 | { |
| 514 | suspend_state_t state; |
| 515 | int error; |
| 516 | |
| 517 | error = pm_autosleep_lock(); |
| 518 | if (error) |
| 519 | return error; |
| 520 | |
| 521 | if (pm_autosleep_state() > PM_SUSPEND_ON) { |
| 522 | error = -EBUSY; |
| 523 | goto out; |
| 524 | } |
| 525 | |
| 526 | state = decode_state(buf, n); |
Rafael J. Wysocki | 406e793 | 2016-11-21 22:45:40 +0100 | [diff] [blame] | 527 | if (state < PM_SUSPEND_MAX) { |
| 528 | if (state == PM_SUSPEND_MEM) |
| 529 | state = mem_sleep_current; |
| 530 | |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 531 | error = pm_suspend(state); |
Rafael J. Wysocki | 406e793 | 2016-11-21 22:45:40 +0100 | [diff] [blame] | 532 | } else if (state == PM_SUSPEND_MAX) { |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 533 | error = hibernate(); |
Rafael J. Wysocki | 406e793 | 2016-11-21 22:45:40 +0100 | [diff] [blame] | 534 | } else { |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 535 | error = -EINVAL; |
Rafael J. Wysocki | 406e793 | 2016-11-21 22:45:40 +0100 | [diff] [blame] | 536 | } |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 537 | |
| 538 | out: |
| 539 | pm_autosleep_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | return error ? error : n; |
| 541 | } |
| 542 | |
| 543 | power_attr(state); |
| 544 | |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 545 | #ifdef CONFIG_PM_SLEEP |
| 546 | /* |
| 547 | * The 'wakeup_count' attribute, along with the functions defined in |
| 548 | * drivers/base/power/wakeup.c, provides a means by which wakeup events can be |
| 549 | * handled in a non-racy way. |
| 550 | * |
| 551 | * If a wakeup event occurs when the system is in a sleep state, it simply is |
| 552 | * woken up. In turn, if an event that would wake the system up from a sleep |
| 553 | * state occurs when it is undergoing a transition to that sleep state, the |
| 554 | * transition should be aborted. Moreover, if such an event occurs when the |
| 555 | * system is in the working state, an attempt to start a transition to the |
| 556 | * given sleep state should fail during certain period after the detection of |
| 557 | * the event. Using the 'state' attribute alone is not sufficient to satisfy |
| 558 | * these requirements, because a wakeup event may occur exactly when 'state' |
| 559 | * is being written to and may be delivered to user space right before it is |
| 560 | * frozen, so the event will remain only partially processed until the system is |
| 561 | * woken up by another event. In particular, it won't cause the transition to |
| 562 | * a sleep state to be aborted. |
| 563 | * |
| 564 | * This difficulty may be overcome if user space uses 'wakeup_count' before |
| 565 | * writing to 'state'. It first should read from 'wakeup_count' and store |
| 566 | * the read value. Then, after carrying out its own preparations for the system |
| 567 | * transition to a sleep state, it should write the stored value to |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 568 | * 'wakeup_count'. If that fails, at least one wakeup event has occurred since |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 569 | * 'wakeup_count' was read and 'state' should not be written to. Otherwise, it |
| 570 | * is allowed to write to 'state', but the transition will be aborted if there |
| 571 | * are any wakeup events detected after 'wakeup_count' was written to. |
| 572 | */ |
| 573 | |
| 574 | static ssize_t wakeup_count_show(struct kobject *kobj, |
| 575 | struct kobj_attribute *attr, |
| 576 | char *buf) |
| 577 | { |
Rafael J. Wysocki | 074037e | 2010-09-22 22:09:10 +0200 | [diff] [blame] | 578 | unsigned int val; |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 579 | |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 580 | return pm_get_wakeup_count(&val, true) ? |
| 581 | sprintf(buf, "%u\n", val) : -EINTR; |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 582 | } |
| 583 | |
| 584 | static ssize_t wakeup_count_store(struct kobject *kobj, |
| 585 | struct kobj_attribute *attr, |
| 586 | const char *buf, size_t n) |
| 587 | { |
Rafael J. Wysocki | 074037e | 2010-09-22 22:09:10 +0200 | [diff] [blame] | 588 | unsigned int val; |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 589 | int error; |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 590 | |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 591 | error = pm_autosleep_lock(); |
| 592 | if (error) |
| 593 | return error; |
| 594 | |
| 595 | if (pm_autosleep_state() > PM_SUSPEND_ON) { |
| 596 | error = -EBUSY; |
| 597 | goto out; |
| 598 | } |
| 599 | |
| 600 | error = -EINVAL; |
Rafael J. Wysocki | 074037e | 2010-09-22 22:09:10 +0200 | [diff] [blame] | 601 | if (sscanf(buf, "%u", &val) == 1) { |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 602 | if (pm_save_wakeup_count(val)) |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 603 | error = n; |
Julius Werner | bb177fe | 2013-06-12 12:55:22 -0700 | [diff] [blame] | 604 | else |
| 605 | pm_print_active_wakeup_sources(); |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 606 | } |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 607 | |
| 608 | out: |
| 609 | pm_autosleep_unlock(); |
| 610 | return error; |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 611 | } |
| 612 | |
| 613 | power_attr(wakeup_count); |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 614 | |
| 615 | #ifdef CONFIG_PM_AUTOSLEEP |
| 616 | static ssize_t autosleep_show(struct kobject *kobj, |
| 617 | struct kobj_attribute *attr, |
| 618 | char *buf) |
| 619 | { |
| 620 | suspend_state_t state = pm_autosleep_state(); |
| 621 | |
| 622 | if (state == PM_SUSPEND_ON) |
| 623 | return sprintf(buf, "off\n"); |
| 624 | |
| 625 | #ifdef CONFIG_SUSPEND |
| 626 | if (state < PM_SUSPEND_MAX) |
Rafael J. Wysocki | d431cbc | 2014-07-15 22:02:11 +0200 | [diff] [blame] | 627 | return sprintf(buf, "%s\n", pm_states[state] ? |
| 628 | pm_states[state] : "error"); |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 629 | #endif |
| 630 | #ifdef CONFIG_HIBERNATION |
| 631 | return sprintf(buf, "disk\n"); |
| 632 | #else |
| 633 | return sprintf(buf, "error"); |
| 634 | #endif |
| 635 | } |
| 636 | |
| 637 | static ssize_t autosleep_store(struct kobject *kobj, |
| 638 | struct kobj_attribute *attr, |
| 639 | const char *buf, size_t n) |
| 640 | { |
| 641 | suspend_state_t state = decode_state(buf, n); |
| 642 | int error; |
| 643 | |
| 644 | if (state == PM_SUSPEND_ON |
Arve Hjønnevåg | 040e5bf | 2012-05-04 00:14:21 +0200 | [diff] [blame] | 645 | && strcmp(buf, "off") && strcmp(buf, "off\n")) |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 646 | return -EINVAL; |
| 647 | |
Rafael J. Wysocki | 406e793 | 2016-11-21 22:45:40 +0100 | [diff] [blame] | 648 | if (state == PM_SUSPEND_MEM) |
| 649 | state = mem_sleep_current; |
| 650 | |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 651 | error = pm_autosleep_set_state(state); |
| 652 | return error ? error : n; |
| 653 | } |
| 654 | |
| 655 | power_attr(autosleep); |
| 656 | #endif /* CONFIG_PM_AUTOSLEEP */ |
Rafael J. Wysocki | b86ff982 | 2012-04-29 22:53:42 +0200 | [diff] [blame] | 657 | |
| 658 | #ifdef CONFIG_PM_WAKELOCKS |
| 659 | static ssize_t wake_lock_show(struct kobject *kobj, |
| 660 | struct kobj_attribute *attr, |
| 661 | char *buf) |
| 662 | { |
| 663 | return pm_show_wakelocks(buf, true); |
| 664 | } |
| 665 | |
| 666 | static ssize_t wake_lock_store(struct kobject *kobj, |
| 667 | struct kobj_attribute *attr, |
| 668 | const char *buf, size_t n) |
| 669 | { |
| 670 | int error = pm_wake_lock(buf); |
| 671 | return error ? error : n; |
| 672 | } |
| 673 | |
| 674 | power_attr(wake_lock); |
| 675 | |
| 676 | static ssize_t wake_unlock_show(struct kobject *kobj, |
| 677 | struct kobj_attribute *attr, |
| 678 | char *buf) |
| 679 | { |
| 680 | return pm_show_wakelocks(buf, false); |
| 681 | } |
| 682 | |
| 683 | static ssize_t wake_unlock_store(struct kobject *kobj, |
| 684 | struct kobj_attribute *attr, |
| 685 | const char *buf, size_t n) |
| 686 | { |
| 687 | int error = pm_wake_unlock(buf); |
| 688 | return error ? error : n; |
| 689 | } |
| 690 | |
| 691 | power_attr(wake_unlock); |
| 692 | |
| 693 | #endif /* CONFIG_PM_WAKELOCKS */ |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 694 | #endif /* CONFIG_PM_SLEEP */ |
| 695 | |
Rafael J. Wysocki | c5c6ba4 | 2006-09-25 23:32:58 -0700 | [diff] [blame] | 696 | #ifdef CONFIG_PM_TRACE |
| 697 | int pm_trace_enabled; |
| 698 | |
Kay Sievers | 386f275 | 2007-11-02 13:47:53 +0100 | [diff] [blame] | 699 | static ssize_t pm_trace_show(struct kobject *kobj, struct kobj_attribute *attr, |
| 700 | char *buf) |
Rafael J. Wysocki | c5c6ba4 | 2006-09-25 23:32:58 -0700 | [diff] [blame] | 701 | { |
| 702 | return sprintf(buf, "%d\n", pm_trace_enabled); |
| 703 | } |
| 704 | |
| 705 | static ssize_t |
Kay Sievers | 386f275 | 2007-11-02 13:47:53 +0100 | [diff] [blame] | 706 | pm_trace_store(struct kobject *kobj, struct kobj_attribute *attr, |
| 707 | const char *buf, size_t n) |
Rafael J. Wysocki | c5c6ba4 | 2006-09-25 23:32:58 -0700 | [diff] [blame] | 708 | { |
| 709 | int val; |
| 710 | |
| 711 | if (sscanf(buf, "%d", &val) == 1) { |
| 712 | pm_trace_enabled = !!val; |
Shuah Khan | 9dceefe | 2013-06-26 16:27:35 -0600 | [diff] [blame] | 713 | if (pm_trace_enabled) { |
| 714 | pr_warn("PM: Enabling pm_trace changes system date and time during resume.\n" |
| 715 | "PM: Correct system time has to be restored manually after resume.\n"); |
| 716 | } |
Rafael J. Wysocki | c5c6ba4 | 2006-09-25 23:32:58 -0700 | [diff] [blame] | 717 | return n; |
| 718 | } |
| 719 | return -EINVAL; |
| 720 | } |
| 721 | |
| 722 | power_attr(pm_trace); |
James Hogan | d33ac60 | 2010-10-12 00:00:25 +0200 | [diff] [blame] | 723 | |
| 724 | static ssize_t pm_trace_dev_match_show(struct kobject *kobj, |
| 725 | struct kobj_attribute *attr, |
| 726 | char *buf) |
| 727 | { |
| 728 | return show_trace_dev_match(buf, PAGE_SIZE); |
| 729 | } |
| 730 | |
Rafael J. Wysocki | a1e9ca6 | 2016-01-02 03:09:16 +0100 | [diff] [blame] | 731 | power_attr_ro(pm_trace_dev_match); |
James Hogan | d33ac60 | 2010-10-12 00:00:25 +0200 | [diff] [blame] | 732 | |
Rafael J. Wysocki | 0e7d56e | 2007-11-19 23:41:19 +0100 | [diff] [blame] | 733 | #endif /* CONFIG_PM_TRACE */ |
Rafael J. Wysocki | c5c6ba4 | 2006-09-25 23:32:58 -0700 | [diff] [blame] | 734 | |
Li Fei | 957d128 | 2013-02-01 08:56:03 +0000 | [diff] [blame] | 735 | #ifdef CONFIG_FREEZER |
| 736 | static ssize_t pm_freeze_timeout_show(struct kobject *kobj, |
| 737 | struct kobj_attribute *attr, char *buf) |
| 738 | { |
| 739 | return sprintf(buf, "%u\n", freeze_timeout_msecs); |
| 740 | } |
| 741 | |
| 742 | static ssize_t pm_freeze_timeout_store(struct kobject *kobj, |
| 743 | struct kobj_attribute *attr, |
| 744 | const char *buf, size_t n) |
| 745 | { |
| 746 | unsigned long val; |
| 747 | |
| 748 | if (kstrtoul(buf, 10, &val)) |
| 749 | return -EINVAL; |
| 750 | |
| 751 | freeze_timeout_msecs = val; |
| 752 | return n; |
| 753 | } |
| 754 | |
| 755 | power_attr(pm_freeze_timeout); |
| 756 | |
| 757 | #endif /* CONFIG_FREEZER*/ |
| 758 | |
Rafael J. Wysocki | c5c6ba4 | 2006-09-25 23:32:58 -0700 | [diff] [blame] | 759 | static struct attribute * g[] = { |
| 760 | &state_attr.attr, |
Rafael J. Wysocki | 0e7d56e | 2007-11-19 23:41:19 +0100 | [diff] [blame] | 761 | #ifdef CONFIG_PM_TRACE |
Rafael J. Wysocki | c5c6ba4 | 2006-09-25 23:32:58 -0700 | [diff] [blame] | 762 | &pm_trace_attr.attr, |
James Hogan | d33ac60 | 2010-10-12 00:00:25 +0200 | [diff] [blame] | 763 | &pm_trace_dev_match_attr.attr, |
Rafael J. Wysocki | 0e7d56e | 2007-11-19 23:41:19 +0100 | [diff] [blame] | 764 | #endif |
Rafael J. Wysocki | 0e06b4a | 2010-01-23 22:25:15 +0100 | [diff] [blame] | 765 | #ifdef CONFIG_PM_SLEEP |
| 766 | &pm_async_attr.attr, |
Rafael J. Wysocki | c125e96 | 2010-07-05 22:43:53 +0200 | [diff] [blame] | 767 | &wakeup_count_attr.attr, |
Rafael J. Wysocki | 406e793 | 2016-11-21 22:45:40 +0100 | [diff] [blame] | 768 | #ifdef CONFIG_SUSPEND |
| 769 | &mem_sleep_attr.attr, |
| 770 | #endif |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 771 | #ifdef CONFIG_PM_AUTOSLEEP |
| 772 | &autosleep_attr.attr, |
| 773 | #endif |
Rafael J. Wysocki | b86ff982 | 2012-04-29 22:53:42 +0200 | [diff] [blame] | 774 | #ifdef CONFIG_PM_WAKELOCKS |
| 775 | &wake_lock_attr.attr, |
| 776 | &wake_unlock_attr.attr, |
| 777 | #endif |
Rafael J. Wysocki | b2df1d4 | 2012-06-21 00:19:33 +0200 | [diff] [blame] | 778 | #ifdef CONFIG_PM_SLEEP_DEBUG |
Rafael J. Wysocki | e516a1d | 2017-07-21 14:44:02 +0200 | [diff] [blame] | 779 | &pm_test_attr.attr, |
Sameer Nanda | 4b7760b | 2012-06-19 22:23:33 +0200 | [diff] [blame] | 780 | &pm_print_times_attr.attr, |
Alexandra Yates | a6f5f0d | 2015-09-15 10:32:46 -0700 | [diff] [blame] | 781 | &pm_wakeup_irq_attr.attr, |
Rafael J. Wysocki | 8d8b244 | 2017-07-19 02:38:44 +0200 | [diff] [blame] | 782 | &pm_debug_messages_attr.attr, |
Rafael J. Wysocki | 0e7d56e | 2007-11-19 23:41:19 +0100 | [diff] [blame] | 783 | #endif |
Rafael J. Wysocki | 0e06b4a | 2010-01-23 22:25:15 +0100 | [diff] [blame] | 784 | #endif |
Li Fei | 957d128 | 2013-02-01 08:56:03 +0000 | [diff] [blame] | 785 | #ifdef CONFIG_FREEZER |
| 786 | &pm_freeze_timeout_attr.attr, |
| 787 | #endif |
Rafael J. Wysocki | c5c6ba4 | 2006-09-25 23:32:58 -0700 | [diff] [blame] | 788 | NULL, |
| 789 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | |
Arvind Yadav | 1d0c6e5 | 2017-06-30 10:22:14 +0530 | [diff] [blame] | 791 | static const struct attribute_group attr_group = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | .attrs = g, |
| 793 | }; |
| 794 | |
Rafael J. Wysocki | 5e928f7 | 2009-08-18 23:38:32 +0200 | [diff] [blame] | 795 | struct workqueue_struct *pm_wq; |
Alan Stern | 7b199ca | 2009-12-03 20:22:21 +0100 | [diff] [blame] | 796 | EXPORT_SYMBOL_GPL(pm_wq); |
Rafael J. Wysocki | 5e928f7 | 2009-08-18 23:38:32 +0200 | [diff] [blame] | 797 | |
| 798 | static int __init pm_start_workqueue(void) |
| 799 | { |
Tejun Heo | 58a69cb | 2011-02-16 09:25:31 +0100 | [diff] [blame] | 800 | pm_wq = alloc_workqueue("pm", WQ_FREEZABLE, 0); |
Rafael J. Wysocki | 5e928f7 | 2009-08-18 23:38:32 +0200 | [diff] [blame] | 801 | |
| 802 | return pm_wq ? 0 : -ENOMEM; |
| 803 | } |
Rafael J. Wysocki | 5e928f7 | 2009-08-18 23:38:32 +0200 | [diff] [blame] | 804 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | static int __init pm_init(void) |
| 806 | { |
Rafael J. Wysocki | 5e928f7 | 2009-08-18 23:38:32 +0200 | [diff] [blame] | 807 | int error = pm_start_workqueue(); |
| 808 | if (error) |
| 809 | return error; |
Rafael J. Wysocki | ac5c24ec | 2010-09-20 19:44:56 +0200 | [diff] [blame] | 810 | hibernate_image_size_init(); |
Rafael J. Wysocki | ddeb648 | 2011-05-15 11:38:48 +0200 | [diff] [blame] | 811 | hibernate_reserved_size_init(); |
Sudeep Holla | fa7fd6f | 2016-08-19 14:41:00 +0100 | [diff] [blame] | 812 | pm_states_init(); |
Greg Kroah-Hartman | d76e15f | 2007-11-27 11:28:26 -0800 | [diff] [blame] | 813 | power_kobj = kobject_create_and_add("power", NULL); |
| 814 | if (!power_kobj) |
Greg Kroah-Hartman | 039a5dc | 2007-11-01 10:39:50 -0700 | [diff] [blame] | 815 | return -ENOMEM; |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 816 | error = sysfs_create_group(power_kobj, &attr_group); |
| 817 | if (error) |
| 818 | return error; |
Rafael J. Wysocki | b2df1d4 | 2012-06-21 00:19:33 +0200 | [diff] [blame] | 819 | pm_print_times_init(); |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 820 | return pm_autosleep_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | } |
| 822 | |
| 823 | core_initcall(pm_init); |