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