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/** @file
Internal definitions for the PVSCSI driver, which produces Extended SCSI
Pass Thru Protocol instances for pvscsi devices.
Copyright (C) 2020, Oracle and/or its affiliates.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __PVSCSI_DXE_H_
#define __PVSCSI_DXE_H_
#include <Library/DebugLib.h>
#include <Protocol/ScsiPassThruExt.h>
typedef struct {
EFI_PHYSICAL_ADDRESS DeviceAddress;
VOID *Mapping;
} PVSCSI_DMA_DESC;
typedef struct {
PVSCSI_RINGS_STATE *RingState;
PVSCSI_DMA_DESC RingStateDmaDesc;
PVSCSI_RING_REQ_DESC *RingReqs;
PVSCSI_DMA_DESC RingReqsDmaDesc;
PVSCSI_RING_CMP_DESC *RingCmps;
PVSCSI_DMA_DESC RingCmpsDmaDesc;
} PVSCSI_RING_DESC;
typedef struct {
//
// As EFI_EXT_SCSI_PASS_THRU_SCSI_REQUEST_PACKET.SenseDataLength is defined
// as UINT8, defining here SenseData size to MAX_UINT8 will guarantee it
// cannot overflow when passed to device.
//
UINT8 SenseData[MAX_UINT8];
//
// This size of the data is arbitrarily chosen.
// It seems to be sufficient for all I/O requests sent through
// EFI_SCSI_PASS_THRU_PROTOCOL.PassThru() for common boot scenarios.
//
UINT8 Data[0x2000];
} PVSCSI_DMA_BUFFER;
#define PVSCSI_SIG SIGNATURE_32 ('P', 'S', 'C', 'S')
typedef struct {
UINT32 Signature;
EFI_PCI_IO_PROTOCOL *PciIo;
EFI_EVENT ExitBoot;
UINT64 OriginalPciAttributes;
PVSCSI_RING_DESC RingDesc;
PVSCSI_DMA_BUFFER *DmaBuf;
PVSCSI_DMA_DESC DmaBufDmaDesc;
UINT8 MaxTarget;
UINT8 MaxLun;
UINTN WaitForCmpStallInUsecs;
EFI_EXT_SCSI_PASS_THRU_PROTOCOL PassThru;
EFI_EXT_SCSI_PASS_THRU_MODE PassThruMode;
} PVSCSI_DEV;
#define PVSCSI_FROM_PASS_THRU(PassThruPointer) \
CR (PassThruPointer, PVSCSI_DEV, PassThru, PVSCSI_SIG)
#define PVSCSI_DMA_BUF_DEV_ADDR(Dev, MemberName) \
(Dev->DmaBufDmaDesc.DeviceAddress + OFFSET_OF(PVSCSI_DMA_BUFFER, MemberName))
#endif // __PVSCSI_DXE_H_
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