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