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

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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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14
MdePkg/Library/UefiScsiLib/UefiScsiLib.c
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@@ -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));