Commit | Line | Data |
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1da177e4 | 1 | #include <linux/suspend.h> |
3010f8ca | 2 | #include <linux/suspend_ioctls.h> |
1da177e4 | 3 | #include <linux/utsname.h> |
b28f5081 | 4 | #include <linux/freezer.h> |
1da177e4 | 5 | |
1da177e4 LT |
6 | struct swsusp_info { |
7 | struct new_utsname uts; | |
8 | u32 version_code; | |
9 | unsigned long num_physpages; | |
10 | int cpus; | |
11 | unsigned long image_pages; | |
7088a5c0 | 12 | unsigned long pages; |
6e1819d6 | 13 | unsigned long size; |
1da177e4 LT |
14 | } __attribute__((aligned(PAGE_SIZE))); |
15 | ||
d307c4a8 RW |
16 | #ifdef CONFIG_HIBERNATION |
17 | #ifdef CONFIG_ARCH_HIBERNATION_HEADER | |
18 | /* Maximum size of architecture specific data in a hibernation header */ | |
19 | #define MAX_ARCH_HEADER_SIZE (sizeof(struct new_utsname) + 4) | |
1da177e4 | 20 | |
d307c4a8 RW |
21 | extern int arch_hibernation_header_save(void *addr, unsigned int max_size); |
22 | extern int arch_hibernation_header_restore(void *addr); | |
23 | ||
24 | static inline int init_header_complete(struct swsusp_info *info) | |
25 | { | |
26 | return arch_hibernation_header_save(info, MAX_ARCH_HEADER_SIZE); | |
27 | } | |
28 | ||
29 | static inline char *check_image_kernel(struct swsusp_info *info) | |
30 | { | |
31 | return arch_hibernation_header_restore(info) ? | |
32 | "architecture specific data" : NULL; | |
33 | } | |
34 | #endif /* CONFIG_ARCH_HIBERNATION_HEADER */ | |
1da177e4 | 35 | |
56f99bcb RW |
36 | /* |
37 | * Keep some memory free so that I/O operations can succeed without paging | |
38 | * [Might this be more than 4 MB?] | |
39 | */ | |
40 | #define PAGES_FOR_IO ((4096 * 1024) >> PAGE_SHIFT) | |
d307c4a8 | 41 | |
56f99bcb RW |
42 | /* |
43 | * Keep 1 MB of memory free so that device drivers can allocate some pages in | |
44 | * their .suspend() routines without breaking the suspend to disk. | |
45 | */ | |
46 | #define SPARE_PAGES ((1024 * 1024) >> PAGE_SHIFT) | |
1da177e4 | 47 | |
8b759b84 | 48 | /* kernel/power/hibernate.c */ |
7777fab9 | 49 | extern int hibernation_snapshot(int platform_mode); |
a634cc10 | 50 | extern int hibernation_restore(int platform_mode); |
7777fab9 | 51 | extern int hibernation_platform_enter(void); |
1da177e4 | 52 | #endif |
a6d70980 | 53 | |
49c3df6a VG |
54 | extern int pfn_is_nosave(unsigned long); |
55 | ||
1da177e4 | 56 | #define power_attr(_name) \ |
386f275f | 57 | static struct kobj_attribute _name##_attr = { \ |
1da177e4 LT |
58 | .attr = { \ |
59 | .name = __stringify(_name), \ | |
60 | .mode = 0644, \ | |
61 | }, \ | |
62 | .show = _name##_show, \ | |
63 | .store = _name##_store, \ | |
64 | } | |
65 | ||
853609b6 RW |
66 | /* Preferred image size in bytes (default 500 MB) */ |
67 | extern unsigned long image_size; | |
f577eb30 | 68 | extern int in_suspend; |
61159a31 | 69 | extern dev_t swsusp_resume_device; |
9a154d9d | 70 | extern sector_t swsusp_resume_block; |
f577eb30 | 71 | |
25761b6e RW |
72 | extern asmlinkage int swsusp_arch_suspend(void); |
73 | extern asmlinkage int swsusp_arch_resume(void); | |
74 | ||
74dfd666 RW |
75 | extern int create_basic_memory_bitmaps(void); |
76 | extern void free_basic_memory_bitmaps(void); | |
64a473cb | 77 | extern int hibernate_preallocate_memory(void); |
f577eb30 | 78 | |
fb13a28b RW |
79 | /** |
80 | * Auxiliary structure used for reading the snapshot image data and | |
81 | * metadata from and writing them to the list of page backup entries | |
82 | * (PBEs) which is the main data structure of swsusp. | |
83 | * | |
84 | * Using struct snapshot_handle we can transfer the image, including its | |
85 | * metadata, as a continuous sequence of bytes with the help of | |
86 | * snapshot_read_next() and snapshot_write_next(). | |
87 | * | |
88 | * The code that writes the image to a storage or transfers it to | |
89 | * the user land is required to use snapshot_read_next() for this | |
90 | * purpose and it should not make any assumptions regarding the internal | |
91 | * structure of the image. Similarly, the code that reads the image from | |
92 | * a storage or transfers it from the user land is required to use | |
93 | * snapshot_write_next(). | |
94 | * | |
95 | * This may allow us to change the internal structure of the image | |
96 | * in the future with considerably less effort. | |
97 | */ | |
98 | ||
f577eb30 | 99 | struct snapshot_handle { |
fb13a28b RW |
100 | unsigned int cur; /* number of the block of PAGE_SIZE bytes the |
101 | * next operation will refer to (ie. current) | |
102 | */ | |
fb13a28b RW |
103 | void *buffer; /* address of the block to read from |
104 | * or write to | |
105 | */ | |
fb13a28b RW |
106 | int sync_read; /* Set to one to notify the caller of |
107 | * snapshot_write_next() that it may | |
108 | * need to call wait_on_bio_chain() | |
109 | */ | |
f577eb30 RW |
110 | }; |
111 | ||
fb13a28b RW |
112 | /* This macro returns the address from/to which the caller of |
113 | * snapshot_read_next()/snapshot_write_next() is allowed to | |
114 | * read/write data after the function returns | |
115 | */ | |
d3c1b24c | 116 | #define data_of(handle) ((handle).buffer) |
f577eb30 | 117 | |
b788db79 | 118 | extern unsigned int snapshot_additional_pages(struct zone *zone); |
af508b34 | 119 | extern unsigned long snapshot_get_image_size(void); |
d3c1b24c JS |
120 | extern int snapshot_read_next(struct snapshot_handle *handle); |
121 | extern int snapshot_write_next(struct snapshot_handle *handle); | |
8357376d | 122 | extern void snapshot_write_finalize(struct snapshot_handle *handle); |
b788db79 | 123 | extern int snapshot_image_loaded(struct snapshot_handle *handle); |
61159a31 | 124 | |
0709db60 RW |
125 | /* If unset, the snapshot device cannot be open. */ |
126 | extern atomic_t snapshot_device_available; | |
127 | ||
d1d241cc RW |
128 | extern sector_t alloc_swapdev_block(int swap); |
129 | extern void free_all_swap_pages(int swap); | |
130 | extern int swsusp_swap_in_use(void); | |
61159a31 | 131 | |
a634cc10 RW |
132 | /* |
133 | * Flags that can be passed from the hibernatig hernel to the "boot" kernel in | |
134 | * the image header. | |
135 | */ | |
136 | #define SF_PLATFORM_MODE 1 | |
f996fc96 | 137 | #define SF_NOCOMPRESS_MODE 2 |
a634cc10 | 138 | |
8b759b84 | 139 | /* kernel/power/hibernate.c */ |
74c7e2ef | 140 | extern int swsusp_check(void); |
74c7e2ef | 141 | extern void swsusp_free(void); |
a634cc10 RW |
142 | extern int swsusp_read(unsigned int *flags_p); |
143 | extern int swsusp_write(unsigned int flags); | |
c2dd0dae | 144 | extern void swsusp_close(fmode_t); |
0d3a9abe | 145 | |
8a0d613f JS |
146 | /* kernel/power/block_io.c */ |
147 | extern struct block_device *hib_resume_bdev; | |
148 | ||
149 | extern int hib_bio_read_page(pgoff_t page_off, void *addr, | |
150 | struct bio **bio_chain); | |
151 | extern int hib_bio_write_page(pgoff_t page_off, void *addr, | |
152 | struct bio **bio_chain); | |
153 | extern int hib_wait_on_bio_chain(struct bio **bio_chain); | |
154 | ||
0d3a9abe | 155 | struct timeval; |
b10d9117 | 156 | /* kernel/power/swsusp.c */ |
0d3a9abe RW |
157 | extern void swsusp_show_speed(struct timeval *, struct timeval *, |
158 | unsigned int, char *); | |
b10d9117 | 159 | |
296699de | 160 | #ifdef CONFIG_SUSPEND |
a9d70523 RW |
161 | /* kernel/power/suspend.c */ |
162 | extern const char *const pm_states[]; | |
163 | ||
164 | extern bool valid_state(suspend_state_t state); | |
6c961dfb | 165 | extern int suspend_devices_and_enter(suspend_state_t state); |
a9d70523 | 166 | extern int enter_state(suspend_state_t state); |
296699de RW |
167 | #else /* !CONFIG_SUSPEND */ |
168 | static inline int suspend_devices_and_enter(suspend_state_t state) | |
169 | { | |
170 | return -ENOSYS; | |
171 | } | |
a9d70523 RW |
172 | static inline int enter_state(suspend_state_t state) { return -ENOSYS; } |
173 | static inline bool valid_state(suspend_state_t state) { return false; } | |
296699de RW |
174 | #endif /* !CONFIG_SUSPEND */ |
175 | ||
a9d70523 RW |
176 | #ifdef CONFIG_PM_TEST_SUSPEND |
177 | /* kernel/power/suspend_test.c */ | |
178 | extern void suspend_test_start(void); | |
179 | extern void suspend_test_finish(const char *label); | |
180 | #else /* !CONFIG_PM_TEST_SUSPEND */ | |
181 | static inline void suspend_test_start(void) {} | |
182 | static inline void suspend_test_finish(const char *label) {} | |
183 | #endif /* !CONFIG_PM_TEST_SUSPEND */ | |
184 | ||
82525756 AS |
185 | #ifdef CONFIG_PM_SLEEP |
186 | /* kernel/power/main.c */ | |
187 | extern int pm_notifier_call_chain(unsigned long val); | |
188 | #endif | |
2f8ed1c6 AB |
189 | |
190 | #ifdef CONFIG_HIGHMEM | |
2f8ed1c6 AB |
191 | int restore_highmem(void); |
192 | #else | |
193 | static inline unsigned int count_highmem_pages(void) { return 0; } | |
194 | static inline int restore_highmem(void) { return 0; } | |
195 | #endif | |
0e7d56e3 RW |
196 | |
197 | /* | |
198 | * Suspend test levels | |
199 | */ | |
200 | enum { | |
201 | /* keep first */ | |
202 | TEST_NONE, | |
203 | TEST_CORE, | |
204 | TEST_CPUS, | |
205 | TEST_PLATFORM, | |
206 | TEST_DEVICES, | |
207 | TEST_FREEZER, | |
208 | /* keep last */ | |
209 | __TEST_AFTER_LAST | |
210 | }; | |
211 | ||
212 | #define TEST_FIRST TEST_NONE | |
213 | #define TEST_MAX (__TEST_AFTER_LAST - 1) | |
4cc79776 RW |
214 | |
215 | extern int pm_test_level; | |
b28f5081 JB |
216 | |
217 | #ifdef CONFIG_SUSPEND_FREEZER | |
218 | static inline int suspend_freeze_processes(void) | |
219 | { | |
220 | return freeze_processes(); | |
221 | } | |
222 | ||
223 | static inline void suspend_thaw_processes(void) | |
224 | { | |
225 | thaw_processes(); | |
226 | } | |
227 | #else | |
228 | static inline int suspend_freeze_processes(void) | |
229 | { | |
230 | return 0; | |
231 | } | |
232 | ||
233 | static inline void suspend_thaw_processes(void) | |
234 | { | |
235 | } | |
236 | #endif |