1 /* 2 * pm_runtime.h - Device run-time power management helper functions. 3 * 4 * Copyright (C) 2009 Rafael J. Wysocki <[email protected]> 5 * 6 * This file is released under the GPLv2. 7 */ 8 9 #ifndef _LINUX_PM_RUNTIME_H 10 #define _LINUX_PM_RUNTIME_H 11 12 #include <linux/device.h> 13 #include <linux/notifier.h> 14 #include <linux/pm.h> 15 16 #include <linux/jiffies.h> 17 18 /* Runtime PM flag argument bits */ 19 #define RPM_ASYNC 0x01 /* Request is asynchronous */ 20 #define RPM_NOWAIT 0x02 /* Don't wait for concurrent 21 state change */ 22 #define RPM_GET_PUT 0x04 /* Increment/decrement the 23 usage_count */ 24 #define RPM_AUTO 0x08 /* Use autosuspend_delay */ 25 26 #ifdef CONFIG_PM 27 extern struct workqueue_struct *pm_wq; 28 29 static inline bool queue_pm_work(struct work_struct *work) 30 { 31 return queue_work(pm_wq, work); 32 } 33 34 extern int pm_generic_runtime_suspend(struct device *dev); 35 extern int pm_generic_runtime_resume(struct device *dev); 36 extern int pm_runtime_force_suspend(struct device *dev); 37 extern int pm_runtime_force_resume(struct device *dev); 38 39 extern int __pm_runtime_idle(struct device *dev, int rpmflags); 40 extern int __pm_runtime_suspend(struct device *dev, int rpmflags); 41 extern int __pm_runtime_resume(struct device *dev, int rpmflags); 42 extern int pm_runtime_get_if_in_use(struct device *dev); 43 extern int pm_schedule_suspend(struct device *dev, unsigned int delay); 44 extern int __pm_runtime_set_status(struct device *dev, unsigned int status); 45 extern int pm_runtime_barrier(struct device *dev); 46 extern void pm_runtime_enable(struct device *dev); 47 extern void __pm_runtime_disable(struct device *dev, bool check_resume); 48 extern void pm_runtime_allow(struct device *dev); 49 extern void pm_runtime_forbid(struct device *dev); 50 extern void pm_runtime_no_callbacks(struct device *dev); 51 extern void pm_runtime_irq_safe(struct device *dev); 52 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use); 53 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay); 54 extern u64 pm_runtime_autosuspend_expiration(struct device *dev); 55 extern void pm_runtime_update_max_time_suspended(struct device *dev, 56 s64 delta_ns); 57 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable); 58 extern void pm_runtime_clean_up_links(struct device *dev); 59 extern void pm_runtime_get_suppliers(struct device *dev); 60 extern void pm_runtime_put_suppliers(struct device *dev); 61 extern void pm_runtime_new_link(struct device *dev); 62 extern void pm_runtime_drop_link(struct device *dev); 63 64 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) 65 { 66 dev->power.ignore_children = enable; 67 } 68 69 static inline void pm_runtime_get_noresume(struct device *dev) 70 { 71 atomic_inc(&dev->power.usage_count); 72 } 73 74 static inline void pm_runtime_put_noidle(struct device *dev) 75 { 76 atomic_add_unless(&dev->power.usage_count, -1, 0); 77 } 78 79 static inline bool pm_runtime_suspended(struct device *dev) 80 { 81 return dev->power.runtime_status == RPM_SUSPENDED 82 && !dev->power.disable_depth; 83 } 84 85 static inline bool pm_runtime_active(struct device *dev) 86 { 87 return dev->power.runtime_status == RPM_ACTIVE 88 || dev->power.disable_depth; 89 } 90 91 static inline bool pm_runtime_status_suspended(struct device *dev) 92 { 93 return dev->power.runtime_status == RPM_SUSPENDED; 94 } 95 96 static inline bool pm_runtime_enabled(struct device *dev) 97 { 98 return !dev->power.disable_depth; 99 } 100 101 static inline bool pm_runtime_callbacks_present(struct device *dev) 102 { 103 return !dev->power.no_callbacks; 104 } 105 106 static inline void pm_runtime_mark_last_busy(struct device *dev) 107 { 108 WRITE_ONCE(dev->power.last_busy, ktime_get_mono_fast_ns()); 109 } 110 111 static inline bool pm_runtime_is_irq_safe(struct device *dev) 112 { 113 return dev->power.irq_safe; 114 } 115 116 extern u64 pm_runtime_suspended_time(struct device *dev); 117 118 #else /* !CONFIG_PM */ 119 120 static inline bool queue_pm_work(struct work_struct *work) { return false; } 121 122 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } 123 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } 124 static inline int pm_runtime_force_suspend(struct device *dev) { return 0; } 125 static inline int pm_runtime_force_resume(struct device *dev) { return 0; } 126 127 static inline int __pm_runtime_idle(struct device *dev, int rpmflags) 128 { 129 return -ENOSYS; 130 } 131 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags) 132 { 133 return -ENOSYS; 134 } 135 static inline int __pm_runtime_resume(struct device *dev, int rpmflags) 136 { 137 return 1; 138 } 139 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) 140 { 141 return -ENOSYS; 142 } 143 static inline int pm_runtime_get_if_in_use(struct device *dev) 144 { 145 return -EINVAL; 146 } 147 static inline int __pm_runtime_set_status(struct device *dev, 148 unsigned int status) { return 0; } 149 static inline int pm_runtime_barrier(struct device *dev) { return 0; } 150 static inline void pm_runtime_enable(struct device *dev) {} 151 static inline void __pm_runtime_disable(struct device *dev, bool c) {} 152 static inline void pm_runtime_allow(struct device *dev) {} 153 static inline void pm_runtime_forbid(struct device *dev) {} 154 155 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {} 156 static inline void pm_runtime_get_noresume(struct device *dev) {} 157 static inline void pm_runtime_put_noidle(struct device *dev) {} 158 static inline bool pm_runtime_suspended(struct device *dev) { return false; } 159 static inline bool pm_runtime_active(struct device *dev) { return true; } 160 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; } 161 static inline bool pm_runtime_enabled(struct device *dev) { return false; } 162 163 static inline void pm_runtime_no_callbacks(struct device *dev) {} 164 static inline void pm_runtime_irq_safe(struct device *dev) {} 165 static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; } 166 167 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; } 168 static inline void pm_runtime_mark_last_busy(struct device *dev) {} 169 static inline void __pm_runtime_use_autosuspend(struct device *dev, 170 bool use) {} 171 static inline void pm_runtime_set_autosuspend_delay(struct device *dev, 172 int delay) {} 173 static inline u64 pm_runtime_autosuspend_expiration( 174 struct device *dev) { return 0; } 175 static inline void pm_runtime_set_memalloc_noio(struct device *dev, 176 bool enable){} 177 static inline void pm_runtime_clean_up_links(struct device *dev) {} 178 static inline void pm_runtime_get_suppliers(struct device *dev) {} 179 static inline void pm_runtime_put_suppliers(struct device *dev) {} 180 static inline void pm_runtime_new_link(struct device *dev) {} 181 static inline void pm_runtime_drop_link(struct device *dev) {} 182 183 #endif /* !CONFIG_PM */ 184 185 static inline int pm_runtime_idle(struct device *dev) 186 { 187 return __pm_runtime_idle(dev, 0); 188 } 189 190 static inline int pm_runtime_suspend(struct device *dev) 191 { 192 return __pm_runtime_suspend(dev, 0); 193 } 194 195 static inline int pm_runtime_autosuspend(struct device *dev) 196 { 197 return __pm_runtime_suspend(dev, RPM_AUTO); 198 } 199 200 static inline int pm_runtime_resume(struct device *dev) 201 { 202 return __pm_runtime_resume(dev, 0); 203 } 204 205 static inline int pm_request_idle(struct device *dev) 206 { 207 return __pm_runtime_idle(dev, RPM_ASYNC); 208 } 209 210 static inline int pm_request_resume(struct device *dev) 211 { 212 return __pm_runtime_resume(dev, RPM_ASYNC); 213 } 214 215 static inline int pm_request_autosuspend(struct device *dev) 216 { 217 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO); 218 } 219 220 static inline int pm_runtime_get(struct device *dev) 221 { 222 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC); 223 } 224 225 static inline int pm_runtime_get_sync(struct device *dev) 226 { 227 return __pm_runtime_resume(dev, RPM_GET_PUT); 228 } 229 230 static inline int pm_runtime_put(struct device *dev) 231 { 232 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC); 233 } 234 235 static inline int pm_runtime_put_autosuspend(struct device *dev) 236 { 237 return __pm_runtime_suspend(dev, 238 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO); 239 } 240 241 static inline int pm_runtime_put_sync(struct device *dev) 242 { 243 return __pm_runtime_idle(dev, RPM_GET_PUT); 244 } 245 246 static inline int pm_runtime_put_sync_suspend(struct device *dev) 247 { 248 return __pm_runtime_suspend(dev, RPM_GET_PUT); 249 } 250 251 static inline int pm_runtime_put_sync_autosuspend(struct device *dev) 252 { 253 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO); 254 } 255 256 static inline int pm_runtime_set_active(struct device *dev) 257 { 258 return __pm_runtime_set_status(dev, RPM_ACTIVE); 259 } 260 261 static inline int pm_runtime_set_suspended(struct device *dev) 262 { 263 return __pm_runtime_set_status(dev, RPM_SUSPENDED); 264 } 265 266 static inline void pm_runtime_disable(struct device *dev) 267 { 268 __pm_runtime_disable(dev, true); 269 } 270 271 static inline void pm_runtime_use_autosuspend(struct device *dev) 272 { 273 __pm_runtime_use_autosuspend(dev, true); 274 } 275 276 static inline void pm_runtime_dont_use_autosuspend(struct device *dev) 277 { 278 __pm_runtime_use_autosuspend(dev, false); 279 } 280 281 #endif 282