Linux kernel mirror (for testing)
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kernel
os
linux
1/*
2 * pm_runtime.h - Device run-time power management helper functions.
3 *
4 * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>
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
27extern struct workqueue_struct *pm_wq;
28
29static inline bool queue_pm_work(struct work_struct *work)
30{
31 return queue_work(pm_wq, work);
32}
33
34extern int pm_generic_runtime_suspend(struct device *dev);
35extern int pm_generic_runtime_resume(struct device *dev);
36extern int pm_runtime_force_suspend(struct device *dev);
37extern int pm_runtime_force_resume(struct device *dev);
38#else
39static inline bool queue_pm_work(struct work_struct *work) { return false; }
40
41static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
42static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
43static inline int pm_runtime_force_suspend(struct device *dev) { return 0; }
44static inline int pm_runtime_force_resume(struct device *dev) { return 0; }
45#endif
46
47#ifdef CONFIG_PM_RUNTIME
48
49extern int __pm_runtime_idle(struct device *dev, int rpmflags);
50extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
51extern int __pm_runtime_resume(struct device *dev, int rpmflags);
52extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
53extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
54extern int pm_runtime_barrier(struct device *dev);
55extern void pm_runtime_enable(struct device *dev);
56extern void __pm_runtime_disable(struct device *dev, bool check_resume);
57extern void pm_runtime_allow(struct device *dev);
58extern void pm_runtime_forbid(struct device *dev);
59extern void pm_runtime_no_callbacks(struct device *dev);
60extern void pm_runtime_irq_safe(struct device *dev);
61extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
62extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
63extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
64extern void pm_runtime_update_max_time_suspended(struct device *dev,
65 s64 delta_ns);
66extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
67
68static inline bool pm_children_suspended(struct device *dev)
69{
70 return dev->power.ignore_children
71 || !atomic_read(&dev->power.child_count);
72}
73
74static inline void pm_runtime_get_noresume(struct device *dev)
75{
76 atomic_inc(&dev->power.usage_count);
77}
78
79static inline void pm_runtime_put_noidle(struct device *dev)
80{
81 atomic_add_unless(&dev->power.usage_count, -1, 0);
82}
83
84static inline bool device_run_wake(struct device *dev)
85{
86 return dev->power.run_wake;
87}
88
89static inline void device_set_run_wake(struct device *dev, bool enable)
90{
91 dev->power.run_wake = enable;
92}
93
94static inline bool pm_runtime_suspended(struct device *dev)
95{
96 return dev->power.runtime_status == RPM_SUSPENDED
97 && !dev->power.disable_depth;
98}
99
100static inline bool pm_runtime_active(struct device *dev)
101{
102 return dev->power.runtime_status == RPM_ACTIVE
103 || dev->power.disable_depth;
104}
105
106static inline bool pm_runtime_status_suspended(struct device *dev)
107{
108 return dev->power.runtime_status == RPM_SUSPENDED;
109}
110
111static inline bool pm_runtime_suspended_if_enabled(struct device *dev)
112{
113 return pm_runtime_status_suspended(dev) && dev->power.disable_depth == 1;
114}
115
116static inline bool pm_runtime_enabled(struct device *dev)
117{
118 return !dev->power.disable_depth;
119}
120
121static inline bool pm_runtime_callbacks_present(struct device *dev)
122{
123 return !dev->power.no_callbacks;
124}
125
126static inline void pm_runtime_mark_last_busy(struct device *dev)
127{
128 ACCESS_ONCE(dev->power.last_busy) = jiffies;
129}
130
131#else /* !CONFIG_PM_RUNTIME */
132
133static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
134{
135 return -ENOSYS;
136}
137static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
138{
139 return -ENOSYS;
140}
141static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
142{
143 return 1;
144}
145static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
146{
147 return -ENOSYS;
148}
149static inline int __pm_runtime_set_status(struct device *dev,
150 unsigned int status) { return 0; }
151static inline int pm_runtime_barrier(struct device *dev) { return 0; }
152static inline void pm_runtime_enable(struct device *dev) {}
153static inline void __pm_runtime_disable(struct device *dev, bool c) {}
154static inline void pm_runtime_allow(struct device *dev) {}
155static inline void pm_runtime_forbid(struct device *dev) {}
156
157static inline bool pm_children_suspended(struct device *dev) { return false; }
158static inline void pm_runtime_get_noresume(struct device *dev) {}
159static inline void pm_runtime_put_noidle(struct device *dev) {}
160static inline bool device_run_wake(struct device *dev) { return false; }
161static inline void device_set_run_wake(struct device *dev, bool enable) {}
162static inline bool pm_runtime_suspended(struct device *dev) { return false; }
163static inline bool pm_runtime_active(struct device *dev) { return true; }
164static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
165static inline bool pm_runtime_suspended_if_enabled(struct device *dev) { return false; }
166static inline bool pm_runtime_enabled(struct device *dev) { return false; }
167
168static inline void pm_runtime_no_callbacks(struct device *dev) {}
169static inline void pm_runtime_irq_safe(struct device *dev) {}
170
171static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
172static inline void pm_runtime_mark_last_busy(struct device *dev) {}
173static inline void __pm_runtime_use_autosuspend(struct device *dev,
174 bool use) {}
175static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
176 int delay) {}
177static inline unsigned long pm_runtime_autosuspend_expiration(
178 struct device *dev) { return 0; }
179static inline void pm_runtime_set_memalloc_noio(struct device *dev,
180 bool enable){}
181
182#endif /* !CONFIG_PM_RUNTIME */
183
184static inline int pm_runtime_idle(struct device *dev)
185{
186 return __pm_runtime_idle(dev, 0);
187}
188
189static inline int pm_runtime_suspend(struct device *dev)
190{
191 return __pm_runtime_suspend(dev, 0);
192}
193
194static inline int pm_runtime_autosuspend(struct device *dev)
195{
196 return __pm_runtime_suspend(dev, RPM_AUTO);
197}
198
199static inline int pm_runtime_resume(struct device *dev)
200{
201 return __pm_runtime_resume(dev, 0);
202}
203
204static inline int pm_request_idle(struct device *dev)
205{
206 return __pm_runtime_idle(dev, RPM_ASYNC);
207}
208
209static inline int pm_request_resume(struct device *dev)
210{
211 return __pm_runtime_resume(dev, RPM_ASYNC);
212}
213
214static inline int pm_request_autosuspend(struct device *dev)
215{
216 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
217}
218
219static inline int pm_runtime_get(struct device *dev)
220{
221 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
222}
223
224static inline int pm_runtime_get_sync(struct device *dev)
225{
226 return __pm_runtime_resume(dev, RPM_GET_PUT);
227}
228
229static inline int pm_runtime_put(struct device *dev)
230{
231 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
232}
233
234static inline int pm_runtime_put_autosuspend(struct device *dev)
235{
236 return __pm_runtime_suspend(dev,
237 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
238}
239
240static inline int pm_runtime_put_sync(struct device *dev)
241{
242 return __pm_runtime_idle(dev, RPM_GET_PUT);
243}
244
245static inline int pm_runtime_put_sync_suspend(struct device *dev)
246{
247 return __pm_runtime_suspend(dev, RPM_GET_PUT);
248}
249
250static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
251{
252 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
253}
254
255static inline int pm_runtime_set_active(struct device *dev)
256{
257 return __pm_runtime_set_status(dev, RPM_ACTIVE);
258}
259
260static inline void pm_runtime_set_suspended(struct device *dev)
261{
262 __pm_runtime_set_status(dev, RPM_SUSPENDED);
263}
264
265static inline void pm_runtime_disable(struct device *dev)
266{
267 __pm_runtime_disable(dev, true);
268}
269
270static inline void pm_runtime_use_autosuspend(struct device *dev)
271{
272 __pm_runtime_use_autosuspend(dev, true);
273}
274
275static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
276{
277 __pm_runtime_use_autosuspend(dev, false);
278}
279
280#endif