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