[GitHub/mt8127/android_kernel_alcatel_ttab.git] / kernel / power / tuxonice_bio_internal.h

/*
 * kernel/power/tuxonice_bio_internal.h
 *
 * Copyright (C) 2009-2010 Nigel Cunningham (nigel at tuxonice net)
 *
 * Distributed under GPLv2.
 *
 * This file contains declarations for functions exported from
 * tuxonice_bio.c, which contains low level io functions.
 */

/* Extent chains */
void toi_extent_state_goto_start(void);
void toi_extent_state_save(int slot);
int go_next_page(int writing, int section_barrier);
void toi_extent_state_restore(int slot);
void free_all_bdev_info(void);
int devices_of_same_priority(struct toi_bdev_info *this);
int toi_register_storage_chain(struct toi_bdev_info *new);
int toi_serialise_extent_chains(void);
int toi_load_extent_chains(void);
int toi_bio_rw_page(int writing, struct page *page, int is_readahead, int free_group);
int toi_bio_restore_original_signature(void);
int toi_bio_devinfo_storage_needed(void);
unsigned long get_headerblock(void);
dev_t get_header_dev_t(void);
struct block_device *get_header_bdev(void);
int toi_bio_allocate_storage(unsigned long request);

/* Signature functions */
#define HaveImage "HaveImage"
#define NoImage "TuxOnIce"
#define sig_size (sizeof(HaveImage))

struct sig_data {
	char sig[sig_size];
	int have_image;
	int resumed_before;

	char have_uuid;
	char header_uuid[17];
	dev_t header_dev_t;
	unsigned long first_header_block;

	/* Repeat the signature to be sure we have a header version */
	char sig2[sig_size];
	int header_version;
};

void forget_signature_page(void);
int toi_check_for_signature(void);
int toi_bio_image_exists(int quiet);
int get_signature_page(void);
int toi_bio_mark_resume_attempted(int);
extern char *toi_cur_sig_page;
extern char *toi_orig_sig_page;
int toi_bio_mark_have_image(void);
extern struct sig_data *toi_sig_data;
extern dev_t resume_dev_t;
extern struct block_device *resume_block_device;
extern struct block_device *header_block_device;
extern unsigned long resume_firstblock;

struct block_device *open_bdev(dev_t device, int display_errs);
extern int current_stream;
extern int more_readahead;
int toi_do_io(int writing, struct block_device *bdev, long block0,
	      struct page *page, int is_readahead, int syncio, int free_group);
int get_main_pool_phys_params(void);

void toi_close_bdev(struct block_device *bdev);
struct block_device *toi_open_bdev(char *uuid, dev_t default_device, int display_errs);

extern struct toi_module_ops toi_blockwriter_ops;
void dump_block_chains(void);
void debug_broken_header(void);
extern unsigned long raw_pages_allocd, header_pages_reserved;
int toi_bio_chains_debug_info(char *buffer, int size);
void toi_bio_chains_post_atomic(struct toi_boot_kernel_data *bkd);
int toi_bio_scan_for_image(int quiet);
int toi_bio_get_header_version(void);

void close_resume_dev_t(int force);
int open_resume_dev_t(int force, int quiet);
Commit	Line	Data
6fa3eb70 S	1	/*
	2	* kernel/power/tuxonice_bio_internal.h
	3	*
	4	* Copyright (C) 2009-2010 Nigel Cunningham (nigel at tuxonice net)
	5	*
	6	* Distributed under GPLv2.
	7	*
	8	* This file contains declarations for functions exported from
	9	* tuxonice_bio.c, which contains low level io functions.
	10	*/
	11
	12	/* Extent chains */
	13	void toi_extent_state_goto_start(void);
	14	void toi_extent_state_save(int slot);
	15	int go_next_page(int writing, int section_barrier);
	16	void toi_extent_state_restore(int slot);
	17	void free_all_bdev_info(void);
	18	int devices_of_same_priority(struct toi_bdev_info *this);
	19	int toi_register_storage_chain(struct toi_bdev_info *new);
	20	int toi_serialise_extent_chains(void);
	21	int toi_load_extent_chains(void);
	22	int toi_bio_rw_page(int writing, struct page *page, int is_readahead, int free_group);
	23	int toi_bio_restore_original_signature(void);
	24	int toi_bio_devinfo_storage_needed(void);
	25	unsigned long get_headerblock(void);
	26	dev_t get_header_dev_t(void);
	27	struct block_device *get_header_bdev(void);
	28	int toi_bio_allocate_storage(unsigned long request);
	29
	30	/* Signature functions */
	31	#define HaveImage "HaveImage"
	32	#define NoImage "TuxOnIce"
	33	#define sig_size (sizeof(HaveImage))
	34
	35	struct sig_data {
	36	char sig[sig_size];
	37	int have_image;
	38	int resumed_before;
	39
	40	char have_uuid;
	41	char header_uuid[17];
	42	dev_t header_dev_t;
	43	unsigned long first_header_block;
	44
	45	/* Repeat the signature to be sure we have a header version */
	46	char sig2[sig_size];
	47	int header_version;
	48	};
	49
	50	void forget_signature_page(void);
	51	int toi_check_for_signature(void);
	52	int toi_bio_image_exists(int quiet);
	53	int get_signature_page(void);
	54	int toi_bio_mark_resume_attempted(int);
	55	extern char *toi_cur_sig_page;
	56	extern char *toi_orig_sig_page;
	57	int toi_bio_mark_have_image(void);
	58	extern struct sig_data *toi_sig_data;
	59	extern dev_t resume_dev_t;
	60	extern struct block_device *resume_block_device;
	61	extern struct block_device *header_block_device;
	62	extern unsigned long resume_firstblock;
	63
	64	struct block_device *open_bdev(dev_t device, int display_errs);
65	extern int current_stream;
66	extern int more_readahead;
67	int toi_do_io(int writing, struct block_device *bdev, long block0,
68	struct page *page, int is_readahead, int syncio, int free_group);
69	int get_main_pool_phys_params(void);
70
71	void toi_close_bdev(struct block_device *bdev);
72	struct block_device toi_open_bdev(char uuid, dev_t default_device, int display_errs);
73
74	extern struct toi_module_ops toi_blockwriter_ops;
75	void dump_block_chains(void);
76	void debug_broken_header(void);
77	extern unsigned long raw_pages_allocd, header_pages_reserved;
78	int toi_bio_chains_debug_info(char *buffer, int size);
79	void toi_bio_chains_post_atomic(struct toi_boot_kernel_data *bkd);
80	int toi_bio_scan_for_image(int quiet);
81	int toi_bio_get_header_version(void);
82
83	void close_resume_dev_t(int force);
84	int open_resume_dev_t(int force, int quiet);