diff options
Diffstat (limited to 'src/roms/SLOF/lib/libvirtio/virtio-blk.h')
| -rw-r--r-- | src/roms/SLOF/lib/libvirtio/virtio-blk.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/src/roms/SLOF/lib/libvirtio/virtio-blk.h b/src/roms/SLOF/lib/libvirtio/virtio-blk.h new file mode 100644 index 0000000..ac8bf28 --- /dev/null +++ b/src/roms/SLOF/lib/libvirtio/virtio-blk.h @@ -0,0 +1,60 @@ +/****************************************************************************** + * 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 */ |
