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