1
2#include <linux/suspend.h>
3#include <linux/suspend_ioctls.h>
4#include <linux/utsname.h>
5#include <linux/freezer.h>
6#include <linux/compiler.h>
7
8struct swsusp_info {
9 struct new_utsname uts;
10 u32 version_code;
11 unsigned long num_physpages;
12 int cpus;
13 unsigned long image_pages;
14 unsigned long pages;
15 unsigned long size;
16} __aligned(PAGE_SIZE);
17
18#ifdef CONFIG_HIBERNATION
19
20extern void __init hibernate_reserved_size_init(void);
21extern void __init hibernate_image_size_init(void);
22
23#ifdef CONFIG_ARCH_HIBERNATION_HEADER
24
25#define MAX_ARCH_HEADER_SIZE (sizeof(struct new_utsname) + 4)
26
27extern int arch_hibernation_header_save(void *addr, unsigned int max_size);
28extern int arch_hibernation_header_restore(void *addr);
29
30static inline int init_header_complete(struct swsusp_info *info)
31{
32 return arch_hibernation_header_save(info, MAX_ARCH_HEADER_SIZE);
33}
34
35static inline const char *check_image_kernel(struct swsusp_info *info)
36{
37 return arch_hibernation_header_restore(info) ?
38 "architecture specific data" : NULL;
39}
40#endif
41
42extern int hibernate_resume_nonboot_cpu_disable(void);
43
44
45
46
47
48#define PAGES_FOR_IO ((4096 * 1024) >> PAGE_SHIFT)
49
50
51
52
53
54#define SPARE_PAGES ((1024 * 1024) >> PAGE_SHIFT)
55
56asmlinkage int swsusp_save(void);
57
58
59extern bool freezer_test_done;
60
61extern int hibernation_snapshot(int platform_mode);
62extern int hibernation_restore(int platform_mode);
63extern int hibernation_platform_enter(void);
64
65#ifdef CONFIG_STRICT_KERNEL_RWX
66
67extern void enable_restore_image_protection(void);
68#else
69static inline void enable_restore_image_protection(void) {}
70#endif
71
72#else
73
74static inline void hibernate_reserved_size_init(void) {}
75static inline void hibernate_image_size_init(void) {}
76#endif
77
78#define power_attr(_name) \
79static struct kobj_attribute _name##_attr = { \
80 .attr = { \
81 .name = __stringify(_name), \
82 .mode = 0644, \
83 }, \
84 .show = _name##_show, \
85 .store = _name##_store, \
86}
87
88#define power_attr_ro(_name) \
89static struct kobj_attribute _name##_attr = { \
90 .attr = { \
91 .name = __stringify(_name), \
92 .mode = S_IRUGO, \
93 }, \
94 .show = _name##_show, \
95}
96
97
98extern unsigned long image_size;
99
100extern unsigned long reserved_size;
101extern int in_suspend;
102extern dev_t swsusp_resume_device;
103extern sector_t swsusp_resume_block;
104
105extern int create_basic_memory_bitmaps(void);
106extern void free_basic_memory_bitmaps(void);
107extern int hibernate_preallocate_memory(void);
108
109extern void clear_free_pages(void);
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131struct snapshot_handle {
132 unsigned int cur;
133
134
135 void *buffer;
136
137
138 int sync_read;
139
140
141
142};
143
144
145
146
147
148#define data_of(handle) ((handle).buffer)
149
150extern unsigned int snapshot_additional_pages(struct zone *zone);
151extern unsigned long snapshot_get_image_size(void);
152extern int snapshot_read_next(struct snapshot_handle *handle);
153extern int snapshot_write_next(struct snapshot_handle *handle);
154extern void snapshot_write_finalize(struct snapshot_handle *handle);
155extern int snapshot_image_loaded(struct snapshot_handle *handle);
156
157extern bool hibernate_acquire(void);
158extern void hibernate_release(void);
159
160extern sector_t alloc_swapdev_block(int swap);
161extern void free_all_swap_pages(int swap);
162extern int swsusp_swap_in_use(void);
163
164
165
166
167
168#define SF_PLATFORM_MODE 1
169#define SF_NOCOMPRESS_MODE 2
170#define SF_CRC32_MODE 4
171
172
173extern int swsusp_check(void);
174extern void swsusp_free(void);
175extern int swsusp_read(unsigned int *flags_p);
176extern int swsusp_write(unsigned int flags);
177extern void swsusp_close(fmode_t);
178#ifdef CONFIG_SUSPEND
179extern int swsusp_unmark(void);
180#endif
181
182struct __kernel_old_timeval;
183
184extern void swsusp_show_speed(ktime_t, ktime_t, unsigned int, char *);
185
186#ifdef CONFIG_SUSPEND
187
188extern const char * const pm_labels[];
189extern const char *pm_states[];
190extern const char *mem_sleep_states[];
191
192extern int suspend_devices_and_enter(suspend_state_t state);
193#else
194#define mem_sleep_current PM_SUSPEND_ON
195
196static inline int suspend_devices_and_enter(suspend_state_t state)
197{
198 return -ENOSYS;
199}
200#endif
201
202#ifdef CONFIG_PM_TEST_SUSPEND
203
204extern void suspend_test_start(void);
205extern void suspend_test_finish(const char *label);
206#else
207static inline void suspend_test_start(void) {}
208static inline void suspend_test_finish(const char *label) {}
209#endif
210
211#ifdef CONFIG_PM_SLEEP
212
213extern int __pm_notifier_call_chain(unsigned long val, int nr_to_call,
214 int *nr_calls);
215extern int pm_notifier_call_chain(unsigned long val);
216#endif
217
218#ifdef CONFIG_HIGHMEM
219int restore_highmem(void);
220#else
221static inline unsigned int count_highmem_pages(void) { return 0; }
222static inline int restore_highmem(void) { return 0; }
223#endif
224
225
226
227
228enum {
229
230 TEST_NONE,
231 TEST_CORE,
232 TEST_CPUS,
233 TEST_PLATFORM,
234 TEST_DEVICES,
235 TEST_FREEZER,
236
237 __TEST_AFTER_LAST
238};
239
240#define TEST_FIRST TEST_NONE
241#define TEST_MAX (__TEST_AFTER_LAST - 1)
242
243#ifdef CONFIG_PM_SLEEP_DEBUG
244extern int pm_test_level;
245#else
246#define pm_test_level (TEST_NONE)
247#endif
248
249#ifdef CONFIG_SUSPEND_FREEZER
250static inline int suspend_freeze_processes(void)
251{
252 int error;
253
254 error = freeze_processes();
255
256
257
258
259 if (error)
260 return error;
261
262 error = freeze_kernel_threads();
263
264
265
266
267 if (error)
268 thaw_processes();
269
270 return error;
271}
272
273static inline void suspend_thaw_processes(void)
274{
275 thaw_processes();
276}
277#else
278static inline int suspend_freeze_processes(void)
279{
280 return 0;
281}
282
283static inline void suspend_thaw_processes(void)
284{
285}
286#endif
287
288#ifdef CONFIG_PM_AUTOSLEEP
289
290
291extern int pm_autosleep_init(void);
292extern int pm_autosleep_lock(void);
293extern void pm_autosleep_unlock(void);
294extern suspend_state_t pm_autosleep_state(void);
295extern int pm_autosleep_set_state(suspend_state_t state);
296
297#else
298
299static inline int pm_autosleep_init(void) { return 0; }
300static inline int pm_autosleep_lock(void) { return 0; }
301static inline void pm_autosleep_unlock(void) {}
302static inline suspend_state_t pm_autosleep_state(void) { return PM_SUSPEND_ON; }
303
304#endif
305
306#ifdef CONFIG_PM_WAKELOCKS
307
308
309extern ssize_t pm_show_wakelocks(char *buf, bool show_active);
310extern int pm_wake_lock(const char *buf);
311extern int pm_wake_unlock(const char *buf);
312
313#endif
314