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