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 <[email protected]> Cc: Jian J Wang <[email protected]> Cc: Liming Gao <[email protected]> Cc: Zhiguang Liu <[email protected]> Signed-off-by: Christopher J Zurcher <[email protected]> --- MdePkg/Include/IndustryStandard/Scsi.h | 8 +++++++- MdePkg/Library/UefiScsiLib/UefiScsiLib.c | 14 ++++++++------ 2 files changed, 15 insertions(+), 7 deletions(-) diff --git a/MdePkg/Include/IndustryStandard/Scsi.h b/MdePkg/Include/IndustryStandard/Scsi.h index 3e966520a1..64b9918b82 100644 --- a/MdePkg/Include/IndustryStandard/Scsi.h +++ b/MdePkg/Include/IndustryStandard/Scsi.h @@ -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 // diff --git a/MdePkg/Library/UefiScsiLib/UefiScsiLib.c b/MdePkg/Library/UefiScsiLib/UefiScsiLib.c index 13a2a1912c..512bec500c 100644 --- a/MdePkg/Library/UefiScsiLib/UefiScsiLib.c +++ b/MdePkg/Library/UefiScsiLib/UefiScsiLib.c @@ -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)); -- 2.16.2.windows.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#56368): https://edk2.groups.io/g/devel/message/56368 Mute This Topic: https://groups.io/mt/72559353/21656 Group Owner: [email protected] Unsubscribe: https://edk2.groups.io/g/devel/unsub [[email protected]] -=-=-=-=-=-=-=-=-=-=-=-
