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

/*
 * kernel/power/tuxonice_bio.h
 *
 * Copyright (C) 2004-2010 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.
 */

#include <linux/buffer_head.h>
#include "tuxonice_extent.h"

void toi_put_extent_chain(struct hibernate_extent_chain *chain);
int toi_add_to_extent_chain(struct hibernate_extent_chain *chain,
			    unsigned long start, unsigned long end);

struct hibernate_extent_saved_state {
	int extent_num;
	struct hibernate_extent *extent_ptr;
	unsigned long offset;
};

struct toi_bdev_info {
	struct toi_bdev_info *next;
	struct hibernate_extent_chain blocks;
	struct block_device *bdev;
	struct toi_module_ops *allocator;
	int allocator_index;
	struct hibernate_extent_chain allocations;
	char name[266];		/* "swap on " or "file " + up to 256 chars */

	/* Saved in header */
	char uuid[17];
	dev_t dev_t;
	int prio;
	int bmap_shift;
	int blocks_per_page;
	unsigned long pages_used;
	struct hibernate_extent_saved_state saved_state[4];
};

struct toi_extent_iterate_state {
	struct toi_bdev_info *current_chain;
	int num_chains;
	int saved_chain_number[4];
	struct toi_bdev_info *saved_chain_ptr[4];
};

/*
 * Our exported interface so the swapwriter and filewriter don't
 * need these functions duplicated.
 */
struct toi_bio_ops {
	int (*bdev_page_io) (int rw, struct block_device *bdev, long pos, struct page *page);
	int (*register_storage) (struct toi_bdev_info *new);
	void (*free_storage) (void);
};

struct toi_allocator_ops {
	unsigned long (*toi_swap_storage_available) (void);
};

extern struct toi_bio_ops toi_bio_ops;

extern char *toi_writer_buffer;
extern int toi_writer_buffer_posn;

struct toi_bio_allocator_ops {
	int (*register_storage) (void);
	unsigned long (*storage_available) (void);
	int (*allocate_storage) (struct toi_bdev_info *, unsigned long);
	int (*bmap) (struct toi_bdev_info *);
	void (*free_storage) (struct toi_bdev_info *);
};
Commit	Line	Data
6fa3eb70 S	1	/*
	2	* kernel/power/tuxonice_bio.h
	3	*
	4	* Copyright (C) 2004-2010 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	#include <linux/buffer_head.h>
	13	#include "tuxonice_extent.h"
	14
	15	void toi_put_extent_chain(struct hibernate_extent_chain *chain);
	16	int toi_add_to_extent_chain(struct hibernate_extent_chain *chain,
	17	unsigned long start, unsigned long end);
	18
	19	struct hibernate_extent_saved_state {
	20	int extent_num;
	21	struct hibernate_extent *extent_ptr;
	22	unsigned long offset;
	23	};
	24
	25	struct toi_bdev_info {
	26	struct toi_bdev_info *next;
	27	struct hibernate_extent_chain blocks;
	28	struct block_device *bdev;
	29	struct toi_module_ops *allocator;
	30	int allocator_index;
	31	struct hibernate_extent_chain allocations;
	32	char name[266]; /* "swap on " or "file " + up to 256 chars */
	33
	34	/* Saved in header */
	35	char uuid[17];
	36	dev_t dev_t;
	37	int prio;
	38	int bmap_shift;
	39	int blocks_per_page;
	40	unsigned long pages_used;
	41	struct hibernate_extent_saved_state saved_state[4];
	42	};
	43
	44	struct toi_extent_iterate_state {
	45	struct toi_bdev_info *current_chain;
	46	int num_chains;
	47	int saved_chain_number[4];
	48	struct toi_bdev_info *saved_chain_ptr[4];
	49	};
	50
	51	/*
	52	* Our exported interface so the swapwriter and filewriter don't
	53	* need these functions duplicated.
	54	*/
	55	struct toi_bio_ops {
	56	int (bdev_page_io) (int rw, struct block_device bdev, long pos, struct page *page);
	57	int (register_storage) (struct toi_bdev_info new);
	58	void (*free_storage) (void);
	59	};
	60
	61	struct toi_allocator_ops {
	62	unsigned long (*toi_swap_storage_available) (void);
	63	};
	64
65	extern struct toi_bio_ops toi_bio_ops;
66
67	extern char *toi_writer_buffer;
68	extern int toi_writer_buffer_posn;
69
70	struct toi_bio_allocator_ops {
71	int (*register_storage) (void);
72	unsigned long (*storage_available) (void);
73	int (allocate_storage) (struct toi_bdev_info , unsigned long);
74	int (bmap) (struct toi_bdev_info );
75	void (free_storage) (struct toi_bdev_info );
76	};