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#ifndef _VIRTIO_BLK_H
#define _VIRTIO_BLK_H
struct virtio_blk_config
{
u64 capacity;
u32 size_max;
u32 seg_max;
u16 cylinders;
u8 heads;
u8 sectors;
u32 blk_size;
u8 physical_block_exp;
u8 alignment_offset;
u16 min_io_size;
u32 opt_io_size;
} __attribute__((packed));
#define VIRTIO_BLK_F_BLK_SIZE 6
/* These two define direction. */
#define VIRTIO_BLK_T_IN 0
#define VIRTIO_BLK_T_OUT 1
/* This is the first element of the read scatter-gather list. */
struct virtio_blk_outhdr {
/* VIRTIO_BLK_T* */
u32 type;
/* io priority. */
u32 ioprio;
/* Sector (ie. 512 byte offset) */
u64 sector;
};
#define VIRTIO_BLK_S_OK 0
#define VIRTIO_BLK_S_IOERR 1
#define VIRTIO_BLK_S_UNSUPP 2
struct disk_op_s;
int process_virtio_op(struct disk_op_s *op);
void virtio_blk_setup(void);
#endif /* _VIRTIO_BLK_H */
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