diff options
Diffstat (limited to 'sys/dev/pci/vioblkreg.h')
| -rw-r--r-- | sys/dev/pci/vioblkreg.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/sys/dev/pci/vioblkreg.h b/sys/dev/pci/vioblkreg.h new file mode 100644 index 00000000000..81d90064895 --- /dev/null +++ b/sys/dev/pci/vioblkreg.h @@ -0,0 +1,75 @@ +/* + * Copyright (c) 2012 Stefan Fritsch. + * Copyright (c) 2010 Minoura Makoto. + * Copyright (c) 1998, 2001 Manuel Bouyer. + * All rights reserved. + * + * This code is based in part on the NetBSD ld_virtio driver and the + * OpenBSD wd driver. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* Configuration registers */ +#define VIRTIO_BLK_CONFIG_CAPACITY 0 /* 64bit */ +#define VIRTIO_BLK_CONFIG_SIZE_MAX 8 /* 32bit */ +#define VIRTIO_BLK_CONFIG_SEG_MAX 12 /* 32bit */ +#define VIRTIO_BLK_CONFIG_GEOMETRY_C 16 /* 16bit */ +#define VIRTIO_BLK_CONFIG_GEOMETRY_H 18 /* 8bit */ +#define VIRTIO_BLK_CONFIG_GEOMETRY_S 19 /* 8bit */ +#define VIRTIO_BLK_CONFIG_BLK_SIZE 20 /* 32bit */ + +/* Feature bits */ +#define VIRTIO_BLK_F_BARRIER (1<<0) +#define VIRTIO_BLK_F_SIZE_MAX (1<<1) +#define VIRTIO_BLK_F_SEG_MAX (1<<2) +#define VIRTIO_BLK_F_GEOMETRY (1<<4) +#define VIRTIO_BLK_F_RO (1<<5) +#define VIRTIO_BLK_F_BLK_SIZE (1<<6) +#define VIRTIO_BLK_F_SCSI (1<<7) +#define VIRTIO_BLK_F_FLUSH (1<<9) +#define VIRTIO_BLK_F_TOPOLOGY (1<<10) + +/* Command */ +#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_GET_ID 8 /* from qemu, not in spec, yet */ +#define VIRTIO_BLK_T_BARRIER 0x80000000 + +/* Status */ +#define VIRTIO_BLK_S_OK 0 +#define VIRTIO_BLK_S_IOERR 1 + +#define VIRTIO_BLK_ID_BYTES 20 /* length of serial number */ + +/* Request header structure */ +struct virtio_blk_req_hdr { + uint32_t type; /* VIRTIO_BLK_T_* */ + uint32_t ioprio; + uint64_t sector; +} __packed; +/* 512*virtio_blk_req_hdr.sector byte payload and 1 byte status follows */ + +#define VIRTIO_BLK_SECTOR_SIZE 512 |