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_RUNTIME 27 28 extern struct workqueue_struct *pm_wq; 29 30 extern int __pm_runtime_idle(struct device *dev, int rpmflags); 31 extern int __pm_runtime_suspend(struct device *dev, int rpmflags); 32 extern int __pm_runtime_resume(struct device *dev, int rpmflags); 33 extern int pm_schedule_suspend(struct device *dev, unsigned int delay); 34 extern int __pm_runtime_set_status(struct device *dev, unsigned int status); 35 extern int pm_runtime_barrier(struct device *dev); 36 extern void pm_runtime_enable(struct device *dev); 37 extern void __pm_runtime_disable(struct device *dev, bool check_resume); 38 extern void pm_runtime_allow(struct device *dev); 39 extern void pm_runtime_forbid(struct device *dev); 40 extern int pm_generic_runtime_suspend(struct device *dev); 41 extern int pm_generic_runtime_resume(struct device *dev); 42 extern void pm_runtime_no_callbacks(struct device *dev); 43 extern void pm_runtime_irq_safe(struct device *dev); 44 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use); 45 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay); 46 extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev); 47 extern void pm_runtime_update_max_time_suspended(struct device *dev, 48 s64 delta_ns); 49 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable); 50 51 static inline bool pm_children_suspended(struct device *dev) 52 { 53 return dev->power.ignore_children 54 || !atomic_read(&dev->power.child_count); 55 } 56 57 static inline void pm_runtime_get_noresume(struct device *dev) 58 { 59 atomic_inc(&dev->power.usage_count); 60 } 61 62 static inline void pm_runtime_put_noidle(struct device *dev) 63 { 64 atomic_add_unless(&dev->power.usage_count, -1, 0); 65 } 66 67 static inline bool device_run_wake(struct device *dev) 68 { 69 return dev->power.run_wake; 70 } 71 72 static inline void device_set_run_wake(struct device *dev, bool enable) 73 { 74 dev->power.run_wake = enable; 75 } 76 77 static inline bool pm_runtime_suspended(struct device *dev) 78 { 79 return dev->power.runtime_status == RPM_SUSPENDED 80 && !dev->power.disable_depth; 81 } 82 83 static inline bool pm_runtime_active(struct device *dev) 84 { 85 return dev->power.runtime_status == RPM_ACTIVE 86 || dev->power.disable_depth; 87 } 88 89 static inline bool pm_runtime_status_suspended(struct device *dev) 90 { 91 return dev->power.runtime_status == RPM_SUSPENDED; 92 } 93 94 static inline bool pm_runtime_enabled(struct device *dev) 95 { 96 return !dev->power.disable_depth; 97 } 98 99 static inline bool pm_runtime_callbacks_present(struct device *dev) 100 { 101 return !dev->power.no_callbacks; 102 } 103 104 static inline void pm_runtime_mark_last_busy(struct device *dev) 105 { 106 ACCESS_ONCE(dev->power.last_busy) = jiffies; 107 } 108 109 #else /* !CONFIG_PM_RUNTIME */ 110 111 static inline int __pm_runtime_idle(struct device *dev, int rpmflags) 112 { 113 return -ENOSYS; 114 } 115 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags) 116 { 117 return -ENOSYS; 118 } 119 static inline int __pm_runtime_resume(struct device *dev, int rpmflags) 120 { 121 return 1; 122 } 123 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) 124 { 125 return -ENOSYS; 126 } 127 static inline int __pm_runtime_set_status(struct device *dev, 128 unsigned int status) { return 0; } 129 static inline int pm_runtime_barrier(struct device *dev) { return 0; } 130 static inline void pm_runtime_enable(struct device *dev) {} 131 static inline void __pm_runtime_disable(struct device *dev, bool c) {} 132 static inline void pm_runtime_allow(struct device *dev) {} 133 static inline void pm_runtime_forbid(struct device *dev) {} 134 135 static inline bool pm_children_suspended(struct device *dev) { return false; } 136 static inline void pm_runtime_get_noresume(struct device *dev) {} 137 static inline void pm_runtime_put_noidle(struct device *dev) {} 138 static inline bool device_run_wake(struct device *dev) { return false; } 139 static inline void device_set_run_wake(struct device *dev, bool enable) {} 140 static inline bool pm_runtime_suspended(struct device *dev) { return false; } 141 static inline bool pm_runtime_active(struct device *dev) { return true; } 142 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; } 143 static inline bool pm_runtime_enabled(struct device *dev) { return false; } 144 145 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } 146 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } 147 static inline void pm_runtime_no_callbacks(struct device *dev) {} 148 static inline void pm_runtime_irq_safe(struct device *dev) {} 149 150 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; } 151 static inline void pm_runtime_mark_last_busy(struct device *dev) {} 152 static inline void __pm_runtime_use_autosuspend(struct device *dev, 153 bool use) {} 154 static inline void pm_runtime_set_autosuspend_delay(struct device *dev, 155 int delay) {} 156 static inline unsigned long pm_runtime_autosuspend_expiration( 157 struct device *dev) { return 0; } 158 static inline void pm_runtime_set_memalloc_noio(struct device *dev, 159 bool enable){} 160 161 #endif /* !CONFIG_PM_RUNTIME */ 162 163 static inline int pm_runtime_idle(struct device *dev) 164 { 165 return __pm_runtime_idle(dev, 0); 166 } 167 168 static inline int pm_runtime_suspend(struct device *dev) 169 { 170 return __pm_runtime_suspend(dev, 0); 171 } 172 173 static inline int pm_runtime_autosuspend(struct device *dev) 174 { 175 return __pm_runtime_suspend(dev, RPM_AUTO); 176 } 177 178 static inline int pm_runtime_resume(struct device *dev) 179 { 180 return __pm_runtime_resume(dev, 0); 181 } 182 183 static inline int pm_request_idle(struct device *dev) 184 { 185 return __pm_runtime_idle(dev, RPM_ASYNC); 186 } 187 188 static inline int pm_request_resume(struct device *dev) 189 { 190 return __pm_runtime_resume(dev, RPM_ASYNC); 191 } 192 193 static inline int pm_request_autosuspend(struct device *dev) 194 { 195 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO); 196 } 197 198 static inline int pm_runtime_get(struct device *dev) 199 { 200 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC); 201 } 202 203 static inline int pm_runtime_get_sync(struct device *dev) 204 { 205 return __pm_runtime_resume(dev, RPM_GET_PUT); 206 } 207 208 static inline int pm_runtime_put(struct device *dev) 209 { 210 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC); 211 } 212 213 static inline int pm_runtime_put_autosuspend(struct device *dev) 214 { 215 return __pm_runtime_suspend(dev, 216 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO); 217 } 218 219 static inline int pm_runtime_put_sync(struct device *dev) 220 { 221 return __pm_runtime_idle(dev, RPM_GET_PUT); 222 } 223 224 static inline int pm_runtime_put_sync_suspend(struct device *dev) 225 { 226 return __pm_runtime_suspend(dev, RPM_GET_PUT); 227 } 228 229 static inline int pm_runtime_put_sync_autosuspend(struct device *dev) 230 { 231 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO); 232 } 233 234 static inline int pm_runtime_set_active(struct device *dev) 235 { 236 return __pm_runtime_set_status(dev, RPM_ACTIVE); 237 } 238 239 static inline void pm_runtime_set_suspended(struct device *dev) 240 { 241 __pm_runtime_set_status(dev, RPM_SUSPENDED); 242 } 243 244 static inline void pm_runtime_disable(struct device *dev) 245 { 246 __pm_runtime_disable(dev, true); 247 } 248 249 static inline void pm_runtime_use_autosuspend(struct device *dev) 250 { 251 __pm_runtime_use_autosuspend(dev, true); 252 } 253 254 static inline void pm_runtime_dont_use_autosuspend(struct device *dev) 255 { 256 __pm_runtime_use_autosuspend(dev, false); 257 } 258 259 #endif 260