1#include <linux/suspend.h>
2#include <linux/suspend_ioctls.h>
3#include <linux/utsname.h>
4#include <linux/freezer.h>
5#include <linux/compiler.h>
6
7struct swsusp_info {
8 struct new_utsname uts;
9 u32 version_code;
10 unsigned long num_physpages;
11 int cpus;
12 unsigned long image_pages;
13 unsigned long pages;
14 unsigned long size;
15} __aligned(PAGE_SIZE);
16
17#ifdef CONFIG_HIBERNATION
18
19extern void __init hibernate_reserved_size_init(void);
20extern void __init hibernate_image_size_init(void);
21
22#ifdef CONFIG_ARCH_HIBERNATION_HEADER
23
24#define MAX_ARCH_HEADER_SIZE (sizeof(struct new_utsname) + 4)
25
26extern int arch_hibernation_header_save(void *addr, unsigned int max_size);
27extern int arch_hibernation_header_restore(void *addr);
28
29static inline int init_header_complete(struct swsusp_info *info)
30{
31 return arch_hibernation_header_save(info, MAX_ARCH_HEADER_SIZE);
32}
33
34static inline char *check_image_kernel(struct swsusp_info *info)
35{
36 return arch_hibernation_header_restore(info) ?
37 "architecture specific data" : NULL;
38}
39#endif
40
41
42
43
44
45#define PAGES_FOR_IO ((4096 * 1024) >> PAGE_SHIFT)
46
47
48
49
50
51#define SPARE_PAGES ((1024 * 1024) >> PAGE_SHIFT)
52
53asmlinkage int swsusp_save(void);
54
55
56extern bool freezer_test_done;
57
58extern int hibernation_snapshot(int platform_mode);
59extern int hibernation_restore(int platform_mode);
60extern int hibernation_platform_enter(void);
61
62#else
63
64static inline void hibernate_reserved_size_init(void) {}
65static inline void hibernate_image_size_init(void) {}
66#endif
67
68extern int pfn_is_nosave(unsigned long);
69
70#define power_attr(_name) \
71static struct kobj_attribute _name##_attr = { \
72 .attr = { \
73 .name = __stringify(_name), \
74 .mode = 0644, \
75 }, \
76 .show = _name##_show, \
77 .store = _name##_store, \
78}
79
80#define power_attr_ro(_name) \
81static struct kobj_attribute _name##_attr = { \
82 .attr = { \
83 .name = __stringify(_name), \
84 .mode = S_IRUGO, \
85 }, \
86 .show = _name##_show, \
87}
88
89
90extern unsigned long image_size;
91
92extern unsigned long reserved_size;
93extern int in_suspend;
94extern dev_t swsusp_resume_device;
95extern sector_t swsusp_resume_block;
96
97extern asmlinkage int swsusp_arch_suspend(void);
98extern asmlinkage int swsusp_arch_resume(void);
99
100extern int create_basic_memory_bitmaps(void);
101extern void free_basic_memory_bitmaps(void);
102extern int hibernate_preallocate_memory(void);
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124struct snapshot_handle {
125 unsigned int cur;
126
127
128 void *buffer;
129
130
131 int sync_read;
132
133
134
135};
136
137
138
139
140
141#define data_of(handle) ((handle).buffer)
142
143extern unsigned int snapshot_additional_pages(struct zone *zone);
144extern unsigned long snapshot_get_image_size(void);
145extern int snapshot_read_next(struct snapshot_handle *handle);
146extern int snapshot_write_next(struct snapshot_handle *handle);
147extern void snapshot_write_finalize(struct snapshot_handle *handle);
148extern int snapshot_image_loaded(struct snapshot_handle *handle);
149
150
151extern atomic_t snapshot_device_available;
152
153extern sector_t alloc_swapdev_block(int swap);
154extern void free_all_swap_pages(int swap);
155extern int swsusp_swap_in_use(void);
156
157
158
159
160
161#define SF_PLATFORM_MODE 1
162#define SF_NOCOMPRESS_MODE 2
163#define SF_CRC32_MODE 4
164
165
166extern int swsusp_check(void);
167extern void swsusp_free(void);
168extern int swsusp_read(unsigned int *flags_p);
169extern int swsusp_write(unsigned int flags);
170extern void swsusp_close(fmode_t);
171#ifdef CONFIG_SUSPEND
172extern int swsusp_unmark(void);
173#endif
174
175struct timeval;
176
177extern void swsusp_show_speed(ktime_t, ktime_t, unsigned int, char *);
178
179#ifdef CONFIG_SUSPEND
180
181extern const char *pm_labels[];
182extern const char *pm_states[];
183
184extern int suspend_devices_and_enter(suspend_state_t state);
185#else
186static inline int suspend_devices_and_enter(suspend_state_t state)
187{
188 return -ENOSYS;
189}
190#endif
191
192#ifdef CONFIG_PM_TEST_SUSPEND
193
194extern void suspend_test_start(void);
195extern void suspend_test_finish(const char *label);
196#else
197static inline void suspend_test_start(void) {}
198static inline void suspend_test_finish(const char *label) {}
199#endif
200
201#ifdef CONFIG_PM_SLEEP
202
203extern int pm_notifier_call_chain(unsigned long val);
204#endif
205
206#ifdef CONFIG_HIGHMEM
207int restore_highmem(void);
208#else
209static inline unsigned int count_highmem_pages(void) { return 0; }
210static inline int restore_highmem(void) { return 0; }
211#endif
212
213
214
215
216enum {
217
218 TEST_NONE,
219 TEST_CORE,
220 TEST_CPUS,
221 TEST_PLATFORM,
222 TEST_DEVICES,
223 TEST_FREEZER,
224
225 __TEST_AFTER_LAST
226};
227
228#define TEST_FIRST TEST_NONE
229#define TEST_MAX (__TEST_AFTER_LAST - 1)
230
231extern int pm_test_level;
232
233#ifdef CONFIG_SUSPEND_FREEZER
234static inline int suspend_freeze_processes(void)
235{
236 int error;
237
238 error = freeze_processes();
239
240
241
242
243 if (error)
244 return error;
245
246 error = freeze_kernel_threads();
247
248
249
250
251 if (error)
252 thaw_processes();
253
254 return error;
255}
256
257static inline void suspend_thaw_processes(void)
258{
259 thaw_processes();
260}
261#else
262static inline int suspend_freeze_processes(void)
263{
264 return 0;
265}
266
267static inline void suspend_thaw_processes(void)
268{
269}
270#endif
271
272#ifdef CONFIG_PM_AUTOSLEEP
273
274
275extern int pm_autosleep_init(void);
276extern int pm_autosleep_lock(void);
277extern void pm_autosleep_unlock(void);
278extern suspend_state_t pm_autosleep_state(void);
279extern int pm_autosleep_set_state(suspend_state_t state);
280
281#else
282
283static inline int pm_autosleep_init(void) { return 0; }
284static inline int pm_autosleep_lock(void) { return 0; }
285static inline void pm_autosleep_unlock(void) {}
286static inline suspend_state_t pm_autosleep_state(void) { return PM_SUSPEND_ON; }
287
288#endif
289
290#ifdef CONFIG_PM_WAKELOCKS
291
292
293extern ssize_t pm_show_wakelocks(char *buf, bool show_active);
294extern int pm_wake_lock(const char *buf);
295extern int pm_wake_unlock(const char *buf);
296
297#endif
298