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1da177e4 LT |
1 | #include <linux/suspend.h> |
2 | #include <linux/utsname.h> | |
3 | ||
1da177e4 LT |
4 | struct swsusp_info { |
5 | struct new_utsname uts; | |
6 | u32 version_code; | |
7 | unsigned long num_physpages; | |
8 | int cpus; | |
9 | unsigned long image_pages; | |
7088a5c0 | 10 | unsigned long pages; |
6e1819d6 | 11 | unsigned long size; |
1da177e4 LT |
12 | } __attribute__((aligned(PAGE_SIZE))); |
13 | ||
14 | ||
15 | ||
16 | #ifdef CONFIG_SOFTWARE_SUSPEND | |
17 | extern int pm_suspend_disk(void); | |
18 | ||
19 | #else | |
20 | static inline int pm_suspend_disk(void) | |
21 | { | |
22 | return -EPERM; | |
23 | } | |
24 | #endif | |
25 | extern struct semaphore pm_sem; | |
26 | #define power_attr(_name) \ | |
27 | static struct subsys_attribute _name##_attr = { \ | |
28 | .attr = { \ | |
29 | .name = __stringify(_name), \ | |
30 | .mode = 0644, \ | |
31 | }, \ | |
32 | .show = _name##_show, \ | |
33 | .store = _name##_store, \ | |
34 | } | |
35 | ||
36 | extern struct subsystem power_subsys; | |
37 | ||
25761b6e RW |
38 | /* References to section boundaries */ |
39 | extern const void __nosave_begin, __nosave_end; | |
40 | ||
72a97e08 RW |
41 | extern struct pbe *pagedir_nosave; |
42 | ||
853609b6 RW |
43 | /* Preferred image size in bytes (default 500 MB) */ |
44 | extern unsigned long image_size; | |
f577eb30 | 45 | extern int in_suspend; |
61159a31 | 46 | extern dev_t swsusp_resume_device; |
f577eb30 | 47 | |
25761b6e RW |
48 | extern asmlinkage int swsusp_arch_suspend(void); |
49 | extern asmlinkage int swsusp_arch_resume(void); | |
50 | ||
72a97e08 | 51 | extern unsigned int count_data_pages(void); |
f577eb30 RW |
52 | |
53 | struct snapshot_handle { | |
54 | loff_t offset; | |
55 | unsigned int page; | |
56 | unsigned int page_offset; | |
57 | unsigned int prev; | |
58 | struct pbe *pbe; | |
59 | void *buffer; | |
60 | unsigned int buf_offset; | |
61 | }; | |
62 | ||
63 | #define data_of(handle) ((handle).buffer + (handle).buf_offset) | |
64 | ||
65 | extern int snapshot_read_next(struct snapshot_handle *handle, size_t count); | |
66 | extern int snapshot_write_next(struct snapshot_handle *handle, size_t count); | |
67 | int snapshot_image_loaded(struct snapshot_handle *handle); | |
61159a31 | 68 | |
6e1819d6 RW |
69 | #define SNAPSHOT_IOC_MAGIC '3' |
70 | #define SNAPSHOT_FREEZE _IO(SNAPSHOT_IOC_MAGIC, 1) | |
71 | #define SNAPSHOT_UNFREEZE _IO(SNAPSHOT_IOC_MAGIC, 2) | |
72 | #define SNAPSHOT_ATOMIC_SNAPSHOT _IOW(SNAPSHOT_IOC_MAGIC, 3, void *) | |
73 | #define SNAPSHOT_ATOMIC_RESTORE _IO(SNAPSHOT_IOC_MAGIC, 4) | |
74 | #define SNAPSHOT_FREE _IO(SNAPSHOT_IOC_MAGIC, 5) | |
75 | #define SNAPSHOT_SET_IMAGE_SIZE _IOW(SNAPSHOT_IOC_MAGIC, 6, unsigned long) | |
76 | #define SNAPSHOT_AVAIL_SWAP _IOR(SNAPSHOT_IOC_MAGIC, 7, void *) | |
77 | #define SNAPSHOT_GET_SWAP_PAGE _IOR(SNAPSHOT_IOC_MAGIC, 8, void *) | |
78 | #define SNAPSHOT_FREE_SWAP_PAGES _IO(SNAPSHOT_IOC_MAGIC, 9) | |
79 | #define SNAPSHOT_SET_SWAP_FILE _IOW(SNAPSHOT_IOC_MAGIC, 10, unsigned int) | |
9b238205 LT |
80 | #define SNAPSHOT_S2RAM _IO(SNAPSHOT_IOC_MAGIC, 11) |
81 | #define SNAPSHOT_IOC_MAXNR 11 | |
6e1819d6 | 82 | |
61159a31 RW |
83 | /** |
84 | * The bitmap is used for tracing allocated swap pages | |
85 | * | |
86 | * The entire bitmap consists of a number of bitmap_page | |
87 | * structures linked with the help of the .next member. | |
88 | * Thus each page can be allocated individually, so we only | |
89 | * need to make 0-order memory allocations to create | |
90 | * the bitmap. | |
91 | */ | |
92 | ||
93 | #define BITMAP_PAGE_SIZE (PAGE_SIZE - sizeof(void *)) | |
94 | #define BITMAP_PAGE_CHUNKS (BITMAP_PAGE_SIZE / sizeof(long)) | |
95 | #define BITS_PER_CHUNK (sizeof(long) * 8) | |
96 | #define BITMAP_PAGE_BITS (BITMAP_PAGE_CHUNKS * BITS_PER_CHUNK) | |
97 | ||
98 | struct bitmap_page { | |
99 | unsigned long chunks[BITMAP_PAGE_CHUNKS]; | |
100 | struct bitmap_page *next; | |
101 | }; | |
102 | ||
103 | extern void free_bitmap(struct bitmap_page *bitmap); | |
104 | extern struct bitmap_page *alloc_bitmap(unsigned int nr_bits); | |
105 | extern unsigned long alloc_swap_page(int swap, struct bitmap_page *bitmap); | |
106 | extern void free_all_swap_pages(int swap, struct bitmap_page *bitmap); | |
107 | ||
74c7e2ef | 108 | extern int swsusp_check(void); |
61159a31 | 109 | extern int swsusp_shrink_memory(void); |
74c7e2ef | 110 | extern void swsusp_free(void); |
61159a31 RW |
111 | extern int swsusp_suspend(void); |
112 | extern int swsusp_resume(void); | |
74c7e2ef RD |
113 | extern int swsusp_read(void); |
114 | extern int swsusp_write(void); | |
115 | extern void swsusp_close(void); | |
9b238205 | 116 | extern int suspend_enter(suspend_state_t state); |