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MdePkg/UefiScsiLib: Set FUA bit for synchronous SCSI Write operations 

The FUA (Force Unit Access) bit forces data to be written directly to
disk instead of the write cache. This prevents data from being lost if a
shutdown or reset is requested immediately after a SCSI write operation.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Zhiguang Liu <zhiguang.liu@intel.com>
Signed-off-by: Christopher J Zurcher <christopher.j.zurcher@intel.com>
This commit is contained in:
Zurcher, Christopher J 2020-03-26 15:34:24 +08:00 committed by mergify[bot]
parent bd6aa93296
commit 8c654bb3ec
2 changed files with 15 additions and 7 deletions
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8
MdePkg/Include/IndustryStandard/Scsi.h
View File

@ -1,7 +1,7 @@
/** @file
Support for SCSI-2 standard
Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2020, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@ -175,6 +175,12 @@
#define EFI_SCSI_DATA_IN 0
#define EFI_SCSI_DATA_OUT 1
//
// SCSI Block Command Cache Control Parameters
//
#define EFI_SCSI_BLOCK_FUA BIT3 ///< Force Unit Access
#define EFI_SCSI_BLOCK_DPO BIT4 ///< Disable Page Out
//
// Peripheral Device Type Definitions
//

14
MdePkg/Library/UefiScsiLib/UefiScsiLib.c
View File

@ -1,7 +1,7 @@
/** @file
UEFI SCSI Library implementation
Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2020, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@ -1055,15 +1055,16 @@ ScsiWrite10Command (
ZeroMem (&CommandPacket, sizeof (EFI_SCSI_IO_SCSI_REQUEST_PACKET));
ZeroMem (Cdb, EFI_SCSI_OP_LENGTH_TEN);
CommandPacket.Timeout = Timeout;
CommandPacket.OutDataBuffer = DataBuffer;
CommandPacket.SenseData = SenseData;
CommandPacket.OutTransferLength= *DataLength;
CommandPacket.Cdb = Cdb;
CommandPacket.Timeout = Timeout;
CommandPacket.OutDataBuffer = DataBuffer;
CommandPacket.SenseData = SenseData;
CommandPacket.OutTransferLength = *DataLength;
CommandPacket.Cdb = Cdb;
//
// Fill Cdb for Write (10) Command
//
Cdb[0] = EFI_SCSI_OP_WRITE10;
Cdb[1] = EFI_SCSI_BLOCK_FUA;
WriteUnaligned32 ((UINT32 *)&Cdb[2], SwapBytes32 (StartLba));
WriteUnaligned16 ((UINT16 *)&Cdb[7], SwapBytes16 ((UINT16) SectorSize));
@ -1263,6 +1264,7 @@ ScsiWrite16Command (
// Fill Cdb for Write (16) Command
//
Cdb[0] = EFI_SCSI_OP_WRITE16;
Cdb[1] = EFI_SCSI_BLOCK_FUA;
WriteUnaligned64 ((UINT64 *)&Cdb[2], SwapBytes64 (StartLba));
WriteUnaligned32 ((UINT32 *)&Cdb[10], SwapBytes32 (SectorSize));