| /****************************************************************************** |
| * Copyright (c) 2011 IBM Corporation |
| * All rights reserved. |
| * This program and the accompanying materials |
| * are made available under the terms of the BSD License |
| * which accompanies this distribution, and is available at |
| * http://www.opensource.org/licenses/bsd-license.php |
| * |
| * Contributors: |
| * IBM Corporation - initial implementation |
| *****************************************************************************/ |
| |
| /* |
| * Virtio block device definitions. |
| * See Virtio Spec, Appendix D, for details |
| */ |
| |
| #ifndef _VIRTIO_BLK_H |
| #define _VIRTIO_BLK_H |
| |
| #include <stdint.h> |
| |
| |
| struct virtio_blk_cfg { |
| uint64_t capacity; |
| uint32_t size_max; |
| uint32_t seg_max; |
| struct virtio_blk_geometry { |
| uint16_t cylinders; |
| uint8_t heads; |
| uint8_t sectors; |
| } geometry; |
| uint32_t blk_size; |
| uint32_t sectors_max; |
| } __attribute__ ((packed)) ; |
| |
| /* Block request */ |
| struct virtio_blk_req { |
| uint32_t type ; |
| uint32_t ioprio ; |
| uint64_t sector ; |
| }; |
| |
| /* Block request types */ |
| #define VIRTIO_BLK_T_IN 0 |
| #define VIRTIO_BLK_T_OUT 1 |
| #define VIRTIO_BLK_T_SCSI_CMD 2 |
| #define VIRTIO_BLK_T_SCSI_CMD_OUT 3 |
| #define VIRTIO_BLK_T_FLUSH 4 |
| #define VIRTIO_BLK_T_FLUSH_OUT 5 |
| #define VIRTIO_BLK_T_BARRIER 0x80000000 |
| |
| /* VIRTIO_BLK Feature bits */ |
| #define VIRTIO_BLK_F_BLK_SIZE (1 << 6) |
| |
| extern int virtioblk_init(struct virtio_device *dev); |
| extern void virtioblk_shutdown(struct virtio_device *dev); |
| extern int virtioblk_read(struct virtio_device *dev, char *buf, long blocknum, long cnt); |
| |
| #endif /* _VIRTIO_BLK_H */ |