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