#ifndef __BLKMAN_H__#define __BLKMAN_H__#include <kernel/fs/devfs.h>// shamelessly pinched from BeOS// some of them seem to be kind of useless;// especially I don't like one error having multiple names// like TIMEOUT or NO_MEMORY#define ERR_DEV_GENERAL					-5120#define ERR_DEV_INVALID_IOCTL			ERR_DEV_GENERAL - 1#define ERR_DEV_NO_MEMORY				ERR_DEV_GENERAL - 2#define ERR_DEV_BAD_DRIVE_NUM			ERR_DEV_GENERAL - 3#define ERR_DEV_NO_MEDIA				ERR_DEV_GENERAL - 4#define ERR_DEV_UNREADABLE				ERR_DEV_GENERAL - 5#define ERR_DEV_FORMAT_ERROR			ERR_DEV_GENERAL - 6#define ERR_DEV_TIMEOUT					ERR_DEV_GENERAL - 7#define ERR_DEV_RECALIBRATE_ERROR		ERR_DEV_GENERAL - 8#define ERR_DEV_SEEK_ERROR				ERR_DEV_GENERAL - 9#define ERR_DEV_ID_ERROR				ERR_DEV_GENERAL - 10#define ERR_DEV_READ_ERROR				ERR_DEV_GENERAL - 11#define ERR_DEV_WRITE_ERROR				ERR_DEV_GENERAL - 12#define ERR_DEV_NOT_READY				ERR_DEV_GENERAL - 13#define ERR_DEV_MEDIA_CHANGED			ERR_DEV_GENERAL - 14#define ERR_DEV_MEDIA_CHANGE_REQUESTED	ERR_DEV_GENERAL - 15#define ERR_DEV_RESOURCE_CONFLICT		ERR_DEV_GENERAL - 16#define ERR_DEV_CONFIGURATION_ERROR		ERR_DEV_GENERAL - 17#define ERR_DEV_DISABLED_BY_USER		ERR_DEV_GENERAL - 18#define ERR_DEV_DOOR_OPEN				ERR_DEV_GENERAL - 19typedef struct blkdev_info *blkdev_cookie;typedef struct blkdev_handle_info *blkdev_handle_cookie;typedef struct blkman_device_info *blkman_dev_cookie;typedef struct blkdev_params {	// these properties can be changed	uint block_size;	uint64 capacity;	// these entries cannot be changed later on	size_t alignment;				// this must 2^i-1 for some i	size_t max_blocks;	size_t dma_boundary;	bool dma_boundary_solid;	int max_sg_num;} blkdev_params;typedef struct phys_vec {	addr_t start;					// physical address	size_t len;} phys_vec;// two reason why to use array of size 1:// 1. zero-sized arrays aren't standard C// 2. it's handy if you need a temporary global variable with num=1typedef struct phys_vecs {	size_t num;	size_t total_len;	phys_vec vec[1];} phys_vecs;#define PHYS_VECS(name, size) \	uint8 name[sizeof(phys_vecs) + (size - 1)*sizeof(phys_vec)]; \	phys_vecs *name = (phys_vecs *)nameenum {	// if the media got changed, all read/write accesses must be rejected	// until get_media_status gets called	IOCTL_GET_MEDIA_STATUS	= 0x8000};#define BLKMAN_MODULE_NAME "generic/blkman/v1"typedef struct blkdev_interface {	// iovecs are physical address here	// pos and num_blocks are in blocks; bytes_transferred in bytes	// vecs are guaranteed to be sufficient	int (*open)( blkdev_cookie cookie, blkdev_handle_cookie *handle );	int (*close)( blkdev_handle_cookie handle );	int (*read) ( blkdev_handle_cookie handle, const phys_vecs *vecs,		off_t pos, size_t num_blocks, size_t *bytes_transferred );	int (*write) ( blkdev_handle_cookie handle, const phys_vecs *vecs,		off_t pos, size_t num_blocks, size_t *bytes_transferred );	int (*ioctl)( blkdev_handle_cookie handle, int op, void *buf, size_t len );} blkdev_interface;typedef struct blkman_interface {	int (*register_blkdev)( blkdev_interface *interface, blkdev_cookie cookie,		const char *name, blkman_dev_cookie *blkman_cookie,		blkdev_params *params );	int (*unregister_blkdev)( blkman_dev_cookie blkman_cookie );	int (*set_capacity)( blkman_dev_cookie blkman_cookie, uint64 capacity, size_t block_size );} blkman_interface;#endif