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Annotation of qemu/roms/SLOF/lib/libvirtio/virtio-blk.h, revision 1.1.1.1

1.1       root        1: /******************************************************************************
                      2:  * Copyright (c) 2011 IBM Corporation
                      3:  * All rights reserved.
                      4:  * This program and the accompanying materials
                      5:  * are made available under the terms of the BSD License
                      6:  * which accompanies this distribution, and is available at
                      7:  * http://www.opensource.org/licenses/bsd-license.php
                      8:  *
                      9:  * Contributors:
                     10:  *     IBM Corporation - initial implementation
                     11:  *****************************************************************************/
                     12: 
                     13: /*
                     14:  * Virtio block device definitions.
                     15:  * See Virtio Spec, Appendix D, for details
                     16:  */
                     17: 
                     18: #ifndef _VIRTIO_BLK_H
                     19: #define _VIRTIO_BLK_H
                     20: 
                     21: #include <stdint.h>
                     22: 
                     23: 
                     24: /* Device configuration layout */
                     25: /*
                     26: struct virtio_blk_config {
                     27:        uint64_t        capacity;
                     28:        uint32_t        size_max;
                     29:        uint32_t        seg_max;
                     30:        struct  virtio_blk_geometry {
                     31:                uint16_t        cylinders;
                     32:                uint8_t         heads;
                     33:                uint8_t         sectors;
                     34:        } geometry;
                     35:        uint32_t        blk_size;
                     36:        uint32_t        sectors_max;
                     37: };
                     38: */
                     39: 
                     40: /* Block request */
                     41: struct virtio_blk_req {
                     42:        uint32_t  type ;
                     43:        uint32_t  ioprio ;
                     44:        uint64_t  sector ;
                     45: };
                     46: 
                     47: /* Block request types */
                     48: #define VIRTIO_BLK_T_IN                        0
                     49: #define VIRTIO_BLK_T_OUT               1
                     50: #define VIRTIO_BLK_T_SCSI_CMD          2
                     51: #define VIRTIO_BLK_T_SCSI_CMD_OUT      3
                     52: #define VIRTIO_BLK_T_FLUSH             4
                     53: #define VIRTIO_BLK_T_FLUSH_OUT         5
                     54: #define VIRTIO_BLK_T_BARRIER           0x80000000
                     55: 
                     56: extern int virtioblk_init(struct virtio_device *dev);
                     57: extern void virtioblk_shutdown(struct virtio_device *dev);
                     58: extern int virtioblk_read(struct virtio_device *dev, char *buf, long blocknum, long cnt);
                     59: 
                     60: #endif  /* _VIRTIO_BLK_H */

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