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_RUNTIME
27
28extern struct workqueue_struct *pm_wq;
29
30extern int __pm_runtime_idle(struct device *dev, int rpmflags);
31extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
32extern int __pm_runtime_resume(struct device *dev, int rpmflags);
33extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
34extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
35extern int pm_runtime_barrier(struct device *dev);
36extern void pm_runtime_enable(struct device *dev);
37extern void __pm_runtime_disable(struct device *dev, bool check_resume);
38extern void pm_runtime_allow(struct device *dev);
39extern void pm_runtime_forbid(struct device *dev);
40extern int pm_generic_runtime_idle(struct device *dev);
41extern int pm_generic_runtime_suspend(struct device *dev);
42extern int pm_generic_runtime_resume(struct device *dev);
43extern void pm_runtime_no_callbacks(struct device *dev);
44extern void pm_runtime_irq_safe(struct device *dev);
45extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
46extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
47extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
48extern void pm_runtime_update_max_time_suspended(struct device *dev,
49 s64 delta_ns);
50extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
51
52static inline bool pm_children_suspended(struct device *dev)
53{
54 return dev->power.ignore_children
55 || !atomic_read(&dev->power.child_count);
56}
57
58static inline void pm_runtime_get_noresume(struct device *dev)
59{
60 atomic_inc(&dev->power.usage_count);
61}
62
63static inline void pm_runtime_put_noidle(struct device *dev)
64{
65 atomic_add_unless(&dev->power.usage_count, -1, 0);
66}
67
68static inline bool device_run_wake(struct device *dev)
69{
70 return dev->power.run_wake;
71}
72
73static inline void device_set_run_wake(struct device *dev, bool enable)
74{
75 dev->power.run_wake = enable;
76}
77
78static inline bool pm_runtime_suspended(struct device *dev)
79{
80 return dev->power.runtime_status == RPM_SUSPENDED
81 && !dev->power.disable_depth;
82}
83
84static inline bool pm_runtime_active(struct device *dev)
85{
86 return dev->power.runtime_status == RPM_ACTIVE
87 || dev->power.disable_depth;
88}
89
90static inline bool pm_runtime_status_suspended(struct device *dev)
91{
92 return dev->power.runtime_status == RPM_SUSPENDED;
93}
94
95static inline bool pm_runtime_enabled(struct device *dev)
96{
97 return !dev->power.disable_depth;
98}
99
100static inline bool pm_runtime_callbacks_present(struct device *dev)
101{
102 return !dev->power.no_callbacks;
103}
104
105static inline void pm_runtime_mark_last_busy(struct device *dev)
106{
107 ACCESS_ONCE(dev->power.last_busy) = jiffies;
108}
109
110#else /* !CONFIG_PM_RUNTIME */
111
112static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
113{
114 return -ENOSYS;
115}
116static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
117{
118 return -ENOSYS;
119}
120static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
121{
122 return 1;
123}
124static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
125{
126 return -ENOSYS;
127}
128static inline int __pm_runtime_set_status(struct device *dev,
129 unsigned int status) { return 0; }
130static inline int pm_runtime_barrier(struct device *dev) { return 0; }
131static inline void pm_runtime_enable(struct device *dev) {}
132static inline void __pm_runtime_disable(struct device *dev, bool c) {}
133static inline void pm_runtime_allow(struct device *dev) {}
134static inline void pm_runtime_forbid(struct device *dev) {}
135
136static inline bool pm_children_suspended(struct device *dev) { return false; }
137static inline void pm_runtime_get_noresume(struct device *dev) {}
138static inline void pm_runtime_put_noidle(struct device *dev) {}
139static inline bool device_run_wake(struct device *dev) { return false; }
140static inline void device_set_run_wake(struct device *dev, bool enable) {}
141static inline bool pm_runtime_suspended(struct device *dev) { return false; }
142static inline bool pm_runtime_active(struct device *dev) { return true; }
143static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
144static inline bool pm_runtime_enabled(struct device *dev) { return false; }
145
146static inline int pm_generic_runtime_idle(struct device *dev) { return 0; }
147static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
148static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
149static inline void pm_runtime_no_callbacks(struct device *dev) {}
150static inline void pm_runtime_irq_safe(struct device *dev) {}
151
152static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
153static inline void pm_runtime_mark_last_busy(struct device *dev) {}
154static inline void __pm_runtime_use_autosuspend(struct device *dev,
155 bool use) {}
156static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
157 int delay) {}
158static inline unsigned long pm_runtime_autosuspend_expiration(
159 struct device *dev) { return 0; }
160static inline void pm_runtime_set_memalloc_noio(struct device *dev,
161 bool enable){}
162
163#endif /* !CONFIG_PM_RUNTIME */
164
165static inline int pm_runtime_idle(struct device *dev)
166{
167 return __pm_runtime_idle(dev, 0);
168}
169
170static inline int pm_runtime_suspend(struct device *dev)
171{
172 return __pm_runtime_suspend(dev, 0);
173}
174
175static inline int pm_runtime_autosuspend(struct device *dev)
176{
177 return __pm_runtime_suspend(dev, RPM_AUTO);
178}
179
180static inline int pm_runtime_resume(struct device *dev)
181{
182 return __pm_runtime_resume(dev, 0);
183}
184
185static inline int pm_request_idle(struct device *dev)
186{
187 return __pm_runtime_idle(dev, RPM_ASYNC);
188}
189
190static inline int pm_request_resume(struct device *dev)
191{
192 return __pm_runtime_resume(dev, RPM_ASYNC);
193}
194
195static inline int pm_request_autosuspend(struct device *dev)
196{
197 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
198}
199
200static inline int pm_runtime_get(struct device *dev)
201{
202 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
203}
204
205static inline int pm_runtime_get_sync(struct device *dev)
206{
207 return __pm_runtime_resume(dev, RPM_GET_PUT);
208}
209
210static inline int pm_runtime_put(struct device *dev)
211{
212 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
213}
214
215static inline int pm_runtime_put_autosuspend(struct device *dev)
216{
217 return __pm_runtime_suspend(dev,
218 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
219}
220
221static inline int pm_runtime_put_sync(struct device *dev)
222{
223 return __pm_runtime_idle(dev, RPM_GET_PUT);
224}
225
226static inline int pm_runtime_put_sync_suspend(struct device *dev)
227{
228 return __pm_runtime_suspend(dev, RPM_GET_PUT);
229}
230
231static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
232{
233 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
234}
235
236static inline int pm_runtime_set_active(struct device *dev)
237{
238 return __pm_runtime_set_status(dev, RPM_ACTIVE);
239}
240
241static inline void pm_runtime_set_suspended(struct device *dev)
242{
243 __pm_runtime_set_status(dev, RPM_SUSPENDED);
244}
245
246static inline void pm_runtime_disable(struct device *dev)
247{
248 __pm_runtime_disable(dev, true);
249}
250
251static inline void pm_runtime_use_autosuspend(struct device *dev)
252{
253 __pm_runtime_use_autosuspend(dev, true);
254}
255
256static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
257{
258 __pm_runtime_use_autosuspend(dev, false);
259}
260
261#endif