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/** @file
This is a simple fault tolerant write driver, based on PlatformFd library.
And it only supports write BufferSize <= SpareAreaLength.
Copyright (c) 2006 - 2008, Intel Corporation. <BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef __FW_FAULT_TOLERANT_WRITE_LITE_PROTOCOL_H__
#define __FW_FAULT_TOLERANT_WRITE_LITE_PROTOCOL_H__
#define EFI_FTW_LITE_PROTOCOL_GUID \
{ 0x3f557189, 0x8dae, 0x45ae, {0xa0, 0xb3, 0x2b, 0x99, 0xca, 0x7a, 0xa7, 0xa0 } }
//
// Forward reference for pure ANSI compatability
//
typedef struct _EFI_FTW_LITE_PROTOCOL EFI_FTW_LITE_PROTOCOL;
//
// Protocol API definitions
//
/**
Starts a target block update. This records information about the write
in fault tolerant storage and will complete the write in a recoverable
manner, ensuring at all times that either the original contents or
the modified contents are available.
@param This Calling context
@param FvBlockHandle The handle of FVB protocol that provides services
for reading, writing, and erasing the target
block.
@param Lba The logical block address of the target block.
@param Offset The offset within the target block to place the
data.
@param Length The number of bytes to write to the target block.
@param Buffer The data to write.
@retval EFI_SUCCESS The function completed successfully
@retval EFI_ABORTED The function could not complete successfully.
@retval EFI_BAD_BUFFER_SIZE The write would span a block boundary, which is
not a valid action.
@retval EFI_ACCESS_DENIED No writes have been allocated.
@retval EFI_NOT_READY The last write has not been completed. Restart ()
must be called to complete it.
**/
typedef
EFI_STATUS
(EFIAPI * EFI_FTW_LITE_WRITE) (
IN EFI_FTW_LITE_PROTOCOL *This,
IN EFI_HANDLE FvbHandle,
IN EFI_LBA Lba,
IN UINTN Offset,
IN UINTN *NumBytes,
IN VOID *Buffer
)
;
//
// Protocol declaration
//
struct _EFI_FTW_LITE_PROTOCOL {
EFI_FTW_LITE_WRITE Write;
};
extern EFI_GUID gEfiFaultTolerantWriteLiteProtocolGuid;
#endif
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