include/linux/pm_runtime.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * pm_runtime.h - Device run-time power management helper functions.
   4  *
   5  * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>
   6  */
   7
   8 #ifndef _LINUX_PM_RUNTIME_H
   9 #define _LINUX_PM_RUNTIME_H
  10
  11 #include <linux/device.h>
  12 #include <linux/notifier.h>
  13 #include <linux/pm.h>
  14
  15 #include <linux/jiffies.h>
  16
  17 /* Runtime PM flag argument bits */
  18 #define RPM_ASYNC               0x01    /* Request is asynchronous */
  19 #define RPM_NOWAIT              0x02    /* Don't wait for concurrent
  20                                             state change */
  21 #define RPM_GET_PUT             0x04    /* Increment/decrement the
  22                                             usage_count */
  23 #define RPM_AUTO                0x08    /* Use autosuspend_delay */
  24
  25 #ifdef CONFIG_PM
  26 extern struct workqueue_struct *pm_wq;
  27
  28 static inline bool queue_pm_work(struct work_struct *work)
  29 {
  30         return queue_work(pm_wq, work);
  31 }
  32
  33 extern int pm_generic_runtime_suspend(struct device *dev);
  34 extern int pm_generic_runtime_resume(struct device *dev);
  35 extern int pm_runtime_force_suspend(struct device *dev);
  36 extern int pm_runtime_force_resume(struct device *dev);
  37
  38 extern int __pm_runtime_idle(struct device *dev, int rpmflags);
  39 extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
  40 extern int __pm_runtime_resume(struct device *dev, int rpmflags);
  41 extern int pm_runtime_get_if_active(struct device *dev, bool ign_usage_count);
  42 extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
  43 extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
  44 extern int pm_runtime_barrier(struct device *dev);
  45 extern void pm_runtime_enable(struct device *dev);
  46 extern void __pm_runtime_disable(struct device *dev, bool check_resume);
  47 extern void pm_runtime_allow(struct device *dev);
  48 extern void pm_runtime_forbid(struct device *dev);
  49 extern void pm_runtime_no_callbacks(struct device *dev);
  50 extern void pm_runtime_irq_safe(struct device *dev);
  51 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
  52 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
  53 extern u64 pm_runtime_autosuspend_expiration(struct device *dev);
  54 extern void pm_runtime_update_max_time_suspended(struct device *dev,
  55                                                  s64 delta_ns);
  56 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
  57 extern void pm_runtime_clean_up_links(struct device *dev);
  58 extern void pm_runtime_get_suppliers(struct device *dev);
  59 extern void pm_runtime_put_suppliers(struct device *dev);
  60 extern void pm_runtime_new_link(struct device *dev);
  61 extern void pm_runtime_drop_link(struct device *dev);
  62
  63 static inline int pm_runtime_get_if_in_use(struct device *dev)
  64 {
  65         return pm_runtime_get_if_active(dev, false);
  66 }
  67
  68 static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
  69 {
  70         dev->power.ignore_children = enable;
  71 }
  72
  73 static inline void pm_runtime_get_noresume(struct device *dev)
  74 {
  75         atomic_inc(&dev->power.usage_count);
  76 }
  77
  78 static inline void pm_runtime_put_noidle(struct device *dev)
  79 {
  80         atomic_add_unless(&dev->power.usage_count, -1, 0);
  81 }
  82
  83 static inline bool pm_runtime_suspended(struct device *dev)
  84 {
  85         return dev->power.runtime_status == RPM_SUSPENDED
  86                 && !dev->power.disable_depth;
  87 }
  88
  89 static inline bool pm_runtime_active(struct device *dev)
  90 {
  91         return dev->power.runtime_status == RPM_ACTIVE
  92                 || dev->power.disable_depth;
  93 }
  94
  95 static inline bool pm_runtime_status_suspended(struct device *dev)
  96 {
  97         return dev->power.runtime_status == RPM_SUSPENDED;
  98 }
  99
 100 static inline bool pm_runtime_enabled(struct device *dev)
 101 {
 102         return !dev->power.disable_depth;
 103 }
 104
 105 static inline bool pm_runtime_has_no_callbacks(struct device *dev)
 106 {
 107         return dev->power.no_callbacks;
 108 }
 109
 110 static inline void pm_runtime_mark_last_busy(struct device *dev)
 111 {
 112         WRITE_ONCE(dev->power.last_busy, ktime_get_mono_fast_ns());
 113 }
 114
 115 static inline bool pm_runtime_is_irq_safe(struct device *dev)
 116 {
 117         return dev->power.irq_safe;
 118 }
 119
 120 extern u64 pm_runtime_suspended_time(struct device *dev);
 121
 122 #else /* !CONFIG_PM */
 123
 124 static inline bool queue_pm_work(struct work_struct *work) { return false; }
 125
 126 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
 127 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
 128 static inline int pm_runtime_force_suspend(struct device *dev) { return 0; }
 129 static inline int pm_runtime_force_resume(struct device *dev) { return 0; }
 130
 131 static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
 132 {
 133         return -ENOSYS;
 134 }
 135 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
 136 {
 137         return -ENOSYS;
 138 }
 139 static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
 140 {
 141         return 1;
 142 }
 143 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
 144 {
 145         return -ENOSYS;
 146 }
 147 static inline int pm_runtime_get_if_in_use(struct device *dev)
 148 {
 149         return -EINVAL;
 150 }
 151 static inline int pm_runtime_get_if_active(struct device *dev,
 152                                            bool ign_usage_count)
 153 {
 154         return -EINVAL;
 155 }
 156 static inline int __pm_runtime_set_status(struct device *dev,
 157                                             unsigned int status) { return 0; }
 158 static inline int pm_runtime_barrier(struct device *dev) { return 0; }
 159 static inline void pm_runtime_enable(struct device *dev) {}
 160 static inline void __pm_runtime_disable(struct device *dev, bool c) {}
 161 static inline void pm_runtime_allow(struct device *dev) {}
 162 static inline void pm_runtime_forbid(struct device *dev) {}
 163
 164 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {}
 165 static inline void pm_runtime_get_noresume(struct device *dev) {}
 166 static inline void pm_runtime_put_noidle(struct device *dev) {}
 167 static inline bool pm_runtime_suspended(struct device *dev) { return false; }
 168 static inline bool pm_runtime_active(struct device *dev) { return true; }
 169 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
 170 static inline bool pm_runtime_enabled(struct device *dev) { return false; }
 171
 172 static inline void pm_runtime_no_callbacks(struct device *dev) {}
 173 static inline void pm_runtime_irq_safe(struct device *dev) {}
 174 static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; }
 175
 176 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
 177 static inline void pm_runtime_mark_last_busy(struct device *dev) {}
 178 static inline void __pm_runtime_use_autosuspend(struct device *dev,
 179                                                 bool use) {}
 180 static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
 181                                                 int delay) {}
 182 static inline u64 pm_runtime_autosuspend_expiration(
 183                                 struct device *dev) { return 0; }
 184 static inline void pm_runtime_set_memalloc_noio(struct device *dev,
 185                                                 bool enable){}
 186 static inline void pm_runtime_clean_up_links(struct device *dev) {}
 187 static inline void pm_runtime_get_suppliers(struct device *dev) {}
 188 static inline void pm_runtime_put_suppliers(struct device *dev) {}
 189 static inline void pm_runtime_new_link(struct device *dev) {}
 190 static inline void pm_runtime_drop_link(struct device *dev) {}
 191
 192 #endif /* !CONFIG_PM */
 193
 194 static inline int pm_runtime_idle(struct device *dev)
 195 {
 196         return __pm_runtime_idle(dev, 0);
 197 }
 198
 199 static inline int pm_runtime_suspend(struct device *dev)
 200 {
 201         return __pm_runtime_suspend(dev, 0);
 202 }
 203
 204 static inline int pm_runtime_autosuspend(struct device *dev)
 205 {
 206         return __pm_runtime_suspend(dev, RPM_AUTO);
 207 }
 208
 209 static inline int pm_runtime_resume(struct device *dev)
 210 {
 211         return __pm_runtime_resume(dev, 0);
 212 }
 213
 214 static inline int pm_request_idle(struct device *dev)
 215 {
 216         return __pm_runtime_idle(dev, RPM_ASYNC);
 217 }
 218
 219 static inline int pm_request_resume(struct device *dev)
 220 {
 221         return __pm_runtime_resume(dev, RPM_ASYNC);
 222 }
 223
 224 static inline int pm_request_autosuspend(struct device *dev)
 225 {
 226         return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
 227 }
 228
 229 static inline int pm_runtime_get(struct device *dev)
 230 {
 231         return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
 232 }
 233
 234 static inline int pm_runtime_get_sync(struct device *dev)
 235 {
 236         return __pm_runtime_resume(dev, RPM_GET_PUT);
 237 }
 238
 239 static inline int pm_runtime_put(struct device *dev)
 240 {
 241         return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
 242 }
 243
 244 static inline int pm_runtime_put_autosuspend(struct device *dev)
 245 {
 246         return __pm_runtime_suspend(dev,
 247             RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
 248 }
 249
 250 static inline int pm_runtime_put_sync(struct device *dev)
 251 {
 252         return __pm_runtime_idle(dev, RPM_GET_PUT);
 253 }
 254
 255 static inline int pm_runtime_put_sync_suspend(struct device *dev)
 256 {
 257         return __pm_runtime_suspend(dev, RPM_GET_PUT);
 258 }
 259
 260 static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
 261 {
 262         return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
 263 }
 264
 265 static inline int pm_runtime_set_active(struct device *dev)
 266 {
 267         return __pm_runtime_set_status(dev, RPM_ACTIVE);
 268 }
 269
 270 static inline int pm_runtime_set_suspended(struct device *dev)
 271 {
 272         return __pm_runtime_set_status(dev, RPM_SUSPENDED);
 273 }
 274
 275 static inline void pm_runtime_disable(struct device *dev)
 276 {
 277         __pm_runtime_disable(dev, true);
 278 }
 279
 280 static inline void pm_runtime_use_autosuspend(struct device *dev)
 281 {
 282         __pm_runtime_use_autosuspend(dev, true);
 283 }
 284
 285 static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
 286 {
 287         __pm_runtime_use_autosuspend(dev, false);
 288 }
 289
 290 #endif