Linux kernel mirror (for testing)
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kernel
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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
39extern int __pm_runtime_idle(struct device *dev, int rpmflags);
40extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
41extern int __pm_runtime_resume(struct device *dev, int rpmflags);
42extern int pm_runtime_get_if_in_use(struct device *dev);
43extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
44extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
45extern int pm_runtime_barrier(struct device *dev);
46extern void pm_runtime_enable(struct device *dev);
47extern void __pm_runtime_disable(struct device *dev, bool check_resume);
48extern void pm_runtime_allow(struct device *dev);
49extern void pm_runtime_forbid(struct device *dev);
50extern void pm_runtime_no_callbacks(struct device *dev);
51extern void pm_runtime_irq_safe(struct device *dev);
52extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
53extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
54extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
55extern void pm_runtime_update_max_time_suspended(struct device *dev,
56 s64 delta_ns);
57extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
58
59static inline bool pm_children_suspended(struct device *dev)
60{
61 return dev->power.ignore_children
62 || !atomic_read(&dev->power.child_count);
63}
64
65static inline void pm_runtime_get_noresume(struct device *dev)
66{
67 atomic_inc(&dev->power.usage_count);
68}
69
70static inline void pm_runtime_put_noidle(struct device *dev)
71{
72 atomic_add_unless(&dev->power.usage_count, -1, 0);
73}
74
75static inline bool device_run_wake(struct device *dev)
76{
77 return dev->power.run_wake;
78}
79
80static inline void device_set_run_wake(struct device *dev, bool enable)
81{
82 dev->power.run_wake = enable;
83}
84
85static inline bool pm_runtime_suspended(struct device *dev)
86{
87 return dev->power.runtime_status == RPM_SUSPENDED
88 && !dev->power.disable_depth;
89}
90
91static inline bool pm_runtime_active(struct device *dev)
92{
93 return dev->power.runtime_status == RPM_ACTIVE
94 || dev->power.disable_depth;
95}
96
97static inline bool pm_runtime_status_suspended(struct device *dev)
98{
99 return dev->power.runtime_status == RPM_SUSPENDED;
100}
101
102static inline bool pm_runtime_enabled(struct device *dev)
103{
104 return !dev->power.disable_depth;
105}
106
107static inline bool pm_runtime_callbacks_present(struct device *dev)
108{
109 return !dev->power.no_callbacks;
110}
111
112static inline void pm_runtime_mark_last_busy(struct device *dev)
113{
114 ACCESS_ONCE(dev->power.last_busy) = jiffies;
115}
116
117static inline bool pm_runtime_is_irq_safe(struct device *dev)
118{
119 return dev->power.irq_safe;
120}
121
122#else /* !CONFIG_PM */
123
124static inline bool queue_pm_work(struct work_struct *work) { return false; }
125
126static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
127static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
128static inline int pm_runtime_force_suspend(struct device *dev) { return 0; }
129static inline int pm_runtime_force_resume(struct device *dev) { return 0; }
130
131static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
132{
133 return -ENOSYS;
134}
135static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
136{
137 return -ENOSYS;
138}
139static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
140{
141 return 1;
142}
143static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
144{
145 return -ENOSYS;
146}
147static inline int pm_runtime_get_if_in_use(struct device *dev)
148{
149 return -EINVAL;
150}
151static inline int __pm_runtime_set_status(struct device *dev,
152 unsigned int status) { return 0; }
153static inline int pm_runtime_barrier(struct device *dev) { return 0; }
154static inline void pm_runtime_enable(struct device *dev) {}
155static inline void __pm_runtime_disable(struct device *dev, bool c) {}
156static inline void pm_runtime_allow(struct device *dev) {}
157static inline void pm_runtime_forbid(struct device *dev) {}
158
159static inline bool pm_children_suspended(struct device *dev) { return false; }
160static inline void pm_runtime_get_noresume(struct device *dev) {}
161static inline void pm_runtime_put_noidle(struct device *dev) {}
162static inline bool device_run_wake(struct device *dev) { return false; }
163static inline void device_set_run_wake(struct device *dev, bool enable) {}
164static inline bool pm_runtime_suspended(struct device *dev) { return false; }
165static inline bool pm_runtime_active(struct device *dev) { return true; }
166static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
167static inline bool pm_runtime_enabled(struct device *dev) { return false; }
168
169static inline void pm_runtime_no_callbacks(struct device *dev) {}
170static inline void pm_runtime_irq_safe(struct device *dev) {}
171static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; }
172
173static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
174static inline void pm_runtime_mark_last_busy(struct device *dev) {}
175static inline void __pm_runtime_use_autosuspend(struct device *dev,
176 bool use) {}
177static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
178 int delay) {}
179static inline unsigned long pm_runtime_autosuspend_expiration(
180 struct device *dev) { return 0; }
181static inline void pm_runtime_set_memalloc_noio(struct device *dev,
182 bool enable){}
183
184#endif /* !CONFIG_PM */
185
186static inline int pm_runtime_idle(struct device *dev)
187{
188 return __pm_runtime_idle(dev, 0);
189}
190
191static inline int pm_runtime_suspend(struct device *dev)
192{
193 return __pm_runtime_suspend(dev, 0);
194}
195
196static inline int pm_runtime_autosuspend(struct device *dev)
197{
198 return __pm_runtime_suspend(dev, RPM_AUTO);
199}
200
201static inline int pm_runtime_resume(struct device *dev)
202{
203 return __pm_runtime_resume(dev, 0);
204}
205
206static inline int pm_request_idle(struct device *dev)
207{
208 return __pm_runtime_idle(dev, RPM_ASYNC);
209}
210
211static inline int pm_request_resume(struct device *dev)
212{
213 return __pm_runtime_resume(dev, RPM_ASYNC);
214}
215
216static inline int pm_request_autosuspend(struct device *dev)
217{
218 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
219}
220
221static inline int pm_runtime_get(struct device *dev)
222{
223 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
224}
225
226static inline int pm_runtime_get_sync(struct device *dev)
227{
228 return __pm_runtime_resume(dev, RPM_GET_PUT);
229}
230
231static inline int pm_runtime_put(struct device *dev)
232{
233 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
234}
235
236static inline int pm_runtime_put_autosuspend(struct device *dev)
237{
238 return __pm_runtime_suspend(dev,
239 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
240}
241
242static inline int pm_runtime_put_sync(struct device *dev)
243{
244 return __pm_runtime_idle(dev, RPM_GET_PUT);
245}
246
247static inline int pm_runtime_put_sync_suspend(struct device *dev)
248{
249 return __pm_runtime_suspend(dev, RPM_GET_PUT);
250}
251
252static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
253{
254 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
255}
256
257static inline int pm_runtime_set_active(struct device *dev)
258{
259 return __pm_runtime_set_status(dev, RPM_ACTIVE);
260}
261
262static inline void pm_runtime_set_suspended(struct device *dev)
263{
264 __pm_runtime_set_status(dev, RPM_SUSPENDED);
265}
266
267static inline void pm_runtime_disable(struct device *dev)
268{
269 __pm_runtime_disable(dev, true);
270}
271
272static inline void pm_runtime_use_autosuspend(struct device *dev)
273{
274 __pm_runtime_use_autosuspend(dev, true);
275}
276
277static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
278{
279 __pm_runtime_use_autosuspend(dev, false);
280}
281
282#endif