mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-04 13:23:26 +01:00
83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
|
/** @file
|
||
|
|
|
||
|
|
Virtio Block Device specific type and macro definitions corresponding to the
|
||
|
|
virtio-0.9.5 specification.
|
||
|
|
|
||
|
|
Copyright (C) 2012, Red Hat, Inc.
|
||
|
|
|
||
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
||
|
|
|
||
|
|
**/
|
||
|
|
|
||
|
|
#ifndef _VIRTIO_BLK_H_
|
||
|
|
#define _VIRTIO_BLK_H_
|
||
|
|
|
||
|
|
#include <IndustryStandard/Virtio.h>
|
||
|
|
|
||
|
|
//
|
||
|
|
// virtio-0.9.5, Appendix D: Block Device
|
||
|
|
//
|
||
|
|
#pragma pack(1)
|
||
|
|
typedef struct {
|
||
|
|
UINT8 PhysicalBlockExp; // # of logical blocks per physical block (log2)
|
||
|
|
UINT8 AlignmentOffset; // offset of first aligned logical block
|
||
|
|
UINT16 MinIoSize; // suggested minimum I/O size in blocks
|
||
|
|
UINT32 OptIoSize; // optimal (suggested maximum) I/O size in blocks
|
||
|
|
} VIRTIO_BLK_TOPOLOGY;
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
UINT64 Capacity;
|
||
|
|
UINT32 SizeMax;
|
||
|
|
UINT32 SegMax;
|
||
|
|
UINT16 Cylinders;
|
||
|
|
UINT8 Heads;
|
||
|
|
UINT8 Sectors;
|
||
|
|
UINT32 BlkSize;
|
||
|
|
VIRTIO_BLK_TOPOLOGY Topology;
|
||
|
|
} VIRTIO_BLK_CONFIG;
|
||
|
|
#pragma pack()
|
||
|
|
|
||
|
|
#define OFFSET_OF_VBLK(Field) OFFSET_OF (VIRTIO_BLK_CONFIG, Field)
|
||
|
|
#define SIZE_OF_VBLK(Field) (sizeof ((VIRTIO_BLK_CONFIG *) 0)->Field)
|
||
|
|
|
||
|
|
#define VIRTIO_BLK_F_BARRIER BIT0
|
||
|
|
#define VIRTIO_BLK_F_SIZE_MAX BIT1
|
||
|
|
#define VIRTIO_BLK_F_SEG_MAX BIT2
|
||
|
|
#define VIRTIO_BLK_F_GEOMETRY BIT4
|
||
|
|
#define VIRTIO_BLK_F_RO BIT5
|
||
|
|
#define VIRTIO_BLK_F_BLK_SIZE BIT6 // treated as "logical block size" in
|
||
|
|
// practice; actual host side
|
||
|
|
// implementation negotiates "optimal"
|
||
|
|
// block size separately, via
|
||
|
|
// VIRTIO_BLK_F_TOPOLOGY
|
||
|
|
#define VIRTIO_BLK_F_SCSI BIT7
|
||
|
|
#define VIRTIO_BLK_F_FLUSH BIT9 // identical to "write cache enabled"
|
||
|
|
#define VIRTIO_BLK_F_TOPOLOGY BIT10 // information on optimal I/O alignment
|
||
|
|
|
||
|
|
//
|
||
|
|
// We keep the status byte separate from the rest of the virtio-blk request
|
||
|
|
// header. See description of historical scattering at the end of Appendix D:
|
||
|
|
// we're going to put the status byte in a separate VRING_DESC.
|
||
|
|
//
|
||
|
|
#pragma pack(1)
|
||
|
|
typedef struct {
|
||
|
|
UINT32 Type;
|
||
|
|
UINT32 IoPrio;
|
||
|
|
UINT64 Sector;
|
||
|
|
} VIRTIO_BLK_REQ;
|
||
|
|
#pragma pack()
|
||
|
|
|
||
|
|
#define VIRTIO_BLK_T_IN 0x00000000
|
||
|
|
#define VIRTIO_BLK_T_OUT 0x00000001
|
||
|
|
#define VIRTIO_BLK_T_SCSI_CMD 0x00000002
|
||
|
|
#define VIRTIO_BLK_T_SCSI_CMD_OUT 0x00000003
|
||
|
|
#define VIRTIO_BLK_T_FLUSH 0x00000004
|
||
|
|
#define VIRTIO_BLK_T_FLUSH_OUT 0x00000005
|
||
|
|
#define VIRTIO_BLK_T_BARRIER BIT31
|
||
|
|
|
||
|
|
#define VIRTIO_BLK_S_OK 0x00
|
||
|
|
#define VIRTIO_BLK_S_IOERR 0x01
|
||
|
|
#define VIRTIO_BLK_S_UNSUPP 0x02
|
||
|
|
|
||
|
|
#endif // _VIRTIO_BLK_H_
|