mirror of
https://github.com/qemu/qemu.git
synced 2024-11-27 05:43:47 +08:00
a8686a9b2b
It needs to be a qdev property, because it belongs to the drive's guest part. Precedence: commita0fef654and6ced55a5. Bonus: info qtree now shows the serial number. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
/*
|
|
* Virtio Block Device
|
|
*
|
|
* Copyright IBM, Corp. 2007
|
|
*
|
|
* Authors:
|
|
* Anthony Liguori <aliguori@us.ibm.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2. See
|
|
* the COPYING file in the top-level directory.
|
|
*
|
|
*/
|
|
|
|
#ifndef _QEMU_VIRTIO_BLK_H
|
|
#define _QEMU_VIRTIO_BLK_H
|
|
|
|
#include "virtio.h"
|
|
#include "block.h"
|
|
|
|
/* from Linux's linux/virtio_blk.h */
|
|
|
|
/* The ID for virtio_block */
|
|
#define VIRTIO_ID_BLOCK 2
|
|
|
|
/* Feature bits */
|
|
#define VIRTIO_BLK_F_BARRIER 0 /* Does host support barriers? */
|
|
#define VIRTIO_BLK_F_SIZE_MAX 1 /* Indicates maximum segment size */
|
|
#define VIRTIO_BLK_F_SEG_MAX 2 /* Indicates maximum # of segments */
|
|
#define VIRTIO_BLK_F_GEOMETRY 4 /* Indicates support of legacy geometry */
|
|
#define VIRTIO_BLK_F_RO 5 /* Disk is read-only */
|
|
#define VIRTIO_BLK_F_BLK_SIZE 6 /* Block size of disk is available*/
|
|
#define VIRTIO_BLK_F_SCSI 7 /* Supports scsi command passthru */
|
|
/* #define VIRTIO_BLK_F_IDENTIFY 8 ATA IDENTIFY supported, DEPRECATED */
|
|
#define VIRTIO_BLK_F_WCACHE 9 /* write cache enabled */
|
|
#define VIRTIO_BLK_F_TOPOLOGY 10 /* Topology information is available */
|
|
|
|
#define VIRTIO_BLK_ID_BYTES 20 /* ID string length */
|
|
|
|
struct virtio_blk_config
|
|
{
|
|
uint64_t capacity;
|
|
uint32_t size_max;
|
|
uint32_t seg_max;
|
|
uint16_t cylinders;
|
|
uint8_t heads;
|
|
uint8_t sectors;
|
|
uint32_t blk_size;
|
|
uint8_t physical_block_exp;
|
|
uint8_t alignment_offset;
|
|
uint16_t min_io_size;
|
|
uint32_t opt_io_size;
|
|
} __attribute__((packed));
|
|
|
|
/* These two define direction. */
|
|
#define VIRTIO_BLK_T_IN 0
|
|
#define VIRTIO_BLK_T_OUT 1
|
|
|
|
/* This bit says it's a scsi command, not an actual read or write. */
|
|
#define VIRTIO_BLK_T_SCSI_CMD 2
|
|
|
|
/* Flush the volatile write cache */
|
|
#define VIRTIO_BLK_T_FLUSH 4
|
|
|
|
/* return the device ID string */
|
|
#define VIRTIO_BLK_T_GET_ID 8
|
|
|
|
/* Barrier before this op. */
|
|
#define VIRTIO_BLK_T_BARRIER 0x80000000
|
|
|
|
/* This is the first element of the read scatter-gather list. */
|
|
struct virtio_blk_outhdr
|
|
{
|
|
/* VIRTIO_BLK_T* */
|
|
uint32_t type;
|
|
/* io priority. */
|
|
uint32_t ioprio;
|
|
/* Sector (ie. 512 byte offset) */
|
|
uint64_t sector;
|
|
};
|
|
|
|
#define VIRTIO_BLK_S_OK 0
|
|
#define VIRTIO_BLK_S_IOERR 1
|
|
#define VIRTIO_BLK_S_UNSUPP 2
|
|
|
|
/* This is the last element of the write scatter-gather list */
|
|
struct virtio_blk_inhdr
|
|
{
|
|
unsigned char status;
|
|
};
|
|
|
|
/* SCSI pass-through header */
|
|
struct virtio_scsi_inhdr
|
|
{
|
|
uint32_t errors;
|
|
uint32_t data_len;
|
|
uint32_t sense_len;
|
|
uint32_t residual;
|
|
};
|
|
|
|
#ifdef __linux__
|
|
#define DEFINE_VIRTIO_BLK_FEATURES(_state, _field) \
|
|
DEFINE_VIRTIO_COMMON_FEATURES(_state, _field), \
|
|
DEFINE_PROP_BIT("scsi", _state, _field, VIRTIO_BLK_F_SCSI, true)
|
|
#else
|
|
#define DEFINE_VIRTIO_BLK_FEATURES(_state, _field) \
|
|
DEFINE_VIRTIO_COMMON_FEATURES(_state, _field)
|
|
#endif
|
|
#endif
|