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/** @file
Virtio SCSI Host 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_SCSI_H_
#define _VIRTIO_SCSI_H_
#include <IndustryStandard/Virtio.h>
//
// virtio-0.9.5, Appendix I: SCSI Host Device
//
#pragma pack(1)
typedef struct {
UINT32 NumQueues;
UINT32 SegMax;
UINT32 MaxSectors;
UINT32 CmdPerLun;
UINT32 EventInfoSize;
UINT32 SenseSize;
UINT32 CdbSize;
UINT16 MaxChannel;
UINT16 MaxTarget;
UINT32 MaxLun;
} VIRTIO_SCSI_CONFIG;
#pragma pack()
#define OFFSET_OF_VSCSI(Field) OFFSET_OF (VIRTIO_SCSI_CONFIG, Field)
#define SIZE_OF_VSCSI(Field) (sizeof ((VIRTIO_SCSI_CONFIG *) 0)->Field)
#define VIRTIO_SCSI_F_INOUT BIT0
#define VIRTIO_SCSI_F_HOTPLUG BIT1
//
// We expect these maximum sizes from the host. Also we force the CdbLength and
// SenseDataLength parameters of EFI_EXT_SCSI_PASS_THRU_PROTOCOL.PassThru() not
// to exceed these limits. See UEFI 2.3.1 errata C 14.7.
//
#define VIRTIO_SCSI_CDB_SIZE 32
#define VIRTIO_SCSI_SENSE_SIZE 96
//
// We pass the dynamically sized buffers ("dataout", "datain") in separate ring
// descriptors.
//
#pragma pack(1)
typedef struct {
UINT8 Lun[8];
UINT64 Id;
UINT8 TaskAttr;
UINT8 Prio;
UINT8 Crn;
UINT8 Cdb[VIRTIO_SCSI_CDB_SIZE];
} VIRTIO_SCSI_REQ;
typedef struct {
UINT32 SenseLen;
UINT32 Residual;
UINT16 StatusQualifier;
UINT8 Status;
UINT8 Response;
UINT8 Sense[VIRTIO_SCSI_SENSE_SIZE];
} VIRTIO_SCSI_RESP;
#pragma pack()
//
// selector of first virtio queue usable for request transfer
//
#define VIRTIO_SCSI_REQUEST_QUEUE 2
//
// host response codes
//
#define VIRTIO_SCSI_S_OK 0
#define VIRTIO_SCSI_S_OVERRUN 1
#define VIRTIO_SCSI_S_ABORTED 2
#define VIRTIO_SCSI_S_BAD_TARGET 3
#define VIRTIO_SCSI_S_RESET 4
#define VIRTIO_SCSI_S_BUSY 5
#define VIRTIO_SCSI_S_TRANSPORT_FAILURE 6
#define VIRTIO_SCSI_S_TARGET_FAILURE 7
#define VIRTIO_SCSI_S_NEXUS_FAILURE 8
#define VIRTIO_SCSI_S_FAILURE 9
#endif // _VIRTIO_SCSI_H_
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