summaryrefslogtreecommitdiffstats
path: root/include/linux/pm_runtime.h
blob: 2efb08a60e638f3b0c043ce6485c54ebc031d5e9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
/*
 * pm_runtime.h - Device run-time power management helper functions.
 *
 * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>
 *
 * This file is released under the GPLv2.
 */

#ifndef _LINUX_PM_RUNTIME_H
#define _LINUX_PM_RUNTIME_H

#include <linux/device.h>
#include <linux/notifier.h>
#include <linux/pm.h>

#include <linux/jiffies.h>

/* Runtime PM flag argument bits */
#define RPM_ASYNC		0x01	/* Request is asynchronous */
#define RPM_NOWAIT		0x02	/* Don't wait for concurrent
					    state change */
#define RPM_GET_PUT		0x04	/* Increment/decrement the
					    usage_count */
#define RPM_AUTO		0x08	/* Use autosuspend_delay */

#ifdef CONFIG_PM
extern struct workqueue_struct *pm_wq;

static inline bool queue_pm_work(struct work_struct *work)
{
	return queue_work(pm_wq, work);
}

extern int pm_generic_runtime_suspend(struct device *dev);
extern int pm_generic_runtime_resume(struct device *dev);
extern int pm_runtime_force_suspend(struct device *dev);
extern int pm_runtime_force_resume(struct device *dev);

extern int __pm_runtime_idle(struct device *dev, int rpmflags);
extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
extern int __pm_runtime_resume(struct device *dev, int rpmflags);
extern int pm_runtime_get_if_in_use(struct device *dev);
extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
extern int pm_runtime_barrier(struct device *dev);
extern void pm_runtime_enable(struct device *dev);
extern void __pm_runtime_disable(struct device *dev, bool check_resume);
extern void pm_runtime_allow(struct device *dev);
extern void pm_runtime_forbid(struct device *dev);
extern void pm_runtime_no_callbacks(struct device *dev);
extern void pm_runtime_irq_safe(struct device *dev);
extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
extern void pm_runtime_update_max_time_suspended(struct device *dev,
						 s64 delta_ns);
extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
extern void pm_runtime_clean_up_links(struct device *dev);
extern void pm_runtime_get_suppliers(struct device *dev);
extern void pm_runtime_put_suppliers(struct device *dev);
extern void pm_runtime_new_link(struct device *dev);
extern void pm_runtime_drop_link(struct device *dev);

static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
{
	dev->power.ignore_children = enable;
}

static inline void pm_runtime_get_noresume(struct device *dev)
{
	atomic_inc(&dev->power.usage_count);
}

static inline void pm_runtime_put_noidle(struct device *dev)
{
	atomic_add_unless(&dev->power.usage_count, -1, 0);
}

static inline bool pm_runtime_suspended(struct device *dev)
{
	return dev->power.runtime_status == RPM_SUSPENDED
		&& !dev->power.disable_depth;
}

static inline bool pm_runtime_active(struct device *dev)
{
	return dev->power.runtime_status == RPM_ACTIVE
		|| dev->power.disable_depth;
}

static inline bool pm_runtime_status_suspended(struct device *dev)
{
	return dev->power.runtime_status == RPM_SUSPENDED;
}

static inline bool pm_runtime_enabled(struct device *dev)
{
	return !dev->power.disable_depth;
}

static inline bool pm_runtime_callbacks_present(struct device *dev)
{
	return !dev->power.no_callbacks;
}

static inline void pm_runtime_mark_last_busy(struct device *dev)
{
	ACCESS_ONCE(dev->power.last_busy) = jiffies;
}

static inline bool pm_runtime_is_irq_safe(struct device *dev)
{
	return dev->power.irq_safe;
}

#else /* !CONFIG_PM */

static inline bool queue_pm_work(struct work_struct *work) { return false; }

static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
static inline int pm_runtime_force_suspend(struct device *dev) { return 0; }
static inline int pm_runtime_force_resume(struct device *dev) { return 0; }

static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
{
	return -ENOSYS;
}
static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
{
	return -ENOSYS;
}
static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
{
	return 1;
}
static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
{
	return -ENOSYS;
}
static inline int pm_runtime_get_if_in_use(struct device *dev)
{
	return -EINVAL;
}
static inline int __pm_runtime_set_status(struct device *dev,
					    unsigned int status) { return 0; }
static inline int pm_runtime_barrier(struct device *dev) { return 0; }
static inline void pm_runtime_enable(struct device *dev) {}
static inline void __pm_runtime_disable(struct device *dev, bool c) {}
static inline void pm_runtime_allow(struct device *dev) {}
static inline void pm_runtime_forbid(struct device *dev) {}

static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {}
static inline void pm_runtime_get_noresume(struct device *dev) {}
static inline void pm_runtime_put_noidle(struct device *dev) {}
static inline bool pm_runtime_suspended(struct device *dev) { return false; }
static inline bool pm_runtime_active(struct device *dev) { return true; }
static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
static inline bool pm_runtime_enabled(struct device *dev) { return false; }

static inline void pm_runtime_no_callbacks(struct device *dev) {}
static inline void pm_runtime_irq_safe(struct device *dev) {}
static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; }

static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
static inline void pm_runtime_mark_last_busy(struct device *dev) {}
static inline void __pm_runtime_use_autosuspend(struct device *dev,
						bool use) {}
static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
						int delay) {}
static inline unsigned long pm_runtime_autosuspend_expiration(
				struct device *dev) { return 0; }
static inline void pm_runtime_set_memalloc_noio(struct device *dev,
						bool enable){}
static inline void pm_runtime_clean_up_links(struct device *dev) {}
static inline void pm_runtime_get_suppliers(struct device *dev) {}
static inline void pm_runtime_put_suppliers(struct device *dev) {}
static inline void pm_runtime_new_link(struct device *dev) {}
static inline void pm_runtime_drop_link(struct device *dev) {}

#endif /* !CONFIG_PM */

static inline int pm_runtime_idle(struct device *dev)
{
	return __pm_runtime_idle(dev, 0);
}

static inline int pm_runtime_suspend(struct device *dev)
{
	return __pm_runtime_suspend(dev, 0);
}

static inline int pm_runtime_autosuspend(struct device *dev)
{
	return __pm_runtime_suspend(dev, RPM_AUTO);
}

static inline int pm_runtime_resume(struct device *dev)
{
	return __pm_runtime_resume(dev, 0);
}

static inline int pm_request_idle(struct device *dev)
{
	return __pm_runtime_idle(dev, RPM_ASYNC);
}

static inline int pm_request_resume(struct device *dev)
{
	return __pm_runtime_resume(dev, RPM_ASYNC);
}

static inline int pm_request_autosuspend(struct device *dev)
{
	return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
}

static inline int pm_runtime_get(struct device *dev)
{
	return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
}

static inline int pm_runtime_get_sync(struct device *dev)
{
	return __pm_runtime_resume(dev, RPM_GET_PUT);
}

static inline int pm_runtime_put(struct device *dev)
{
	return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
}

static inline int pm_runtime_put_autosuspend(struct device *dev)
{
	return __pm_runtime_suspend(dev,
	    RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
}

static inline int pm_runtime_put_sync(struct device *dev)
{
	return __pm_runtime_idle(dev, RPM_GET_PUT);
}

static inline int pm_runtime_put_sync_suspend(struct device *dev)
{
	return __pm_runtime_suspend(dev, RPM_GET_PUT);
}

static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
{
	return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
}

static inline int pm_runtime_set_active(struct device *dev)
{
	return __pm_runtime_set_status(dev, RPM_ACTIVE);
}

static inline int pm_runtime_set_suspended(struct device *dev)
{
	return __pm_runtime_set_status(dev, RPM_SUSPENDED);
}

static inline void pm_runtime_disable(struct device *dev)
{
	__pm_runtime_disable(dev, true);
}

static inline void pm_runtime_use_autosuspend(struct device *dev)
{
	__pm_runtime_use_autosuspend(dev, true);
}

static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
{
	__pm_runtime_use_autosuspend(dev, false);
}

#endif
OpenPOWER on IntegriCloud