1. retired console control protocol.

[mirror_edk2.git] / MdeModulePkg / Include / Protocol / FaultTolerantWrite.h

/** @file\r
Fault Tolerant Write protocol provides boot-time service to do fault tolerant \r
write capability for block devices.  The protocol provides for non-volatile \r
intermediate storage of the data and private information a caller would need to \r
recover from a critical fault, such as power failure.   \r
\r
Copyright (c) 2009, Intel Corporation                                                         \r
All rights reserved. This program and the accompanying materials                          \r
are licensed and made available under the terms and conditions of the BSD License         \r
which accompanies this distribution.  The full text of the license may be found at        \r
http://opensource.org/licenses/bsd-license.php                                            \r
                                                                                          \r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
\r
**/\r
\r
#ifndef _FW_FAULT_TOLERANT_WRITE_PROTOCOL_H_\r
#define _FW_FAULT_TOLERANT_WRITE_PROTOCOL_H_\r
\r
#define EFI_FAULT_TOLERANT_WRITE_PROTOCOL_GUID \\r
  { \\r
    0x3ebd9e82, 0x2c78, 0x4de6, {0x97, 0x86, 0x8d, 0x4b, 0xfc, 0xb7, 0xc8, 0x81 } \\r
  }\r
\r
//\r
// Forward reference for pure ANSI compatability\r
//\r
typedef struct _EFI_FAULT_TOLERANT_WRITE_PROTOCOL  EFI_FAULT_TOLERANT_WRITE_PROTOCOL;\r
\r
/**\r
  Query the largest block that may be updated in a fault tolerant manner.\r
\r
  @param  This                 Indicates a pointer to the calling context.\r
  @param  BlockSize            A pointer to a caller allocated UINTN that is\r
                               updated to  indicate the size of the largest block\r
                               that can be updated.\r
\r
  @retval EFI_SUCCESS          The function completed successfully\r
  @retval EFI_ABORTED          The function could not complete successfully.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_FAULT_TOLERANT_WRITE_GET_MAX_BLOCK_SIZE) (\r
  IN EFI_FAULT_TOLERANT_WRITE_PROTOCOL    * This,\r
  OUT UINTN                               *BlockSize\r
  );\r
\r
/**\r
  Allocates space for the protocol to maintain information about writes.\r
  Since writes must be completed in a fault tolerant manner and multiple\r
  updates will require more resources to be successful, this function\r
  enables the protocol to ensure that enough space exists to track\r
  information about the upcoming writes.\r
\r
  @param  This                 Indicates a pointer to the calling context.\r
  @param  CallerId             The GUID identifying the write.\r
  @param  PrivateDataSize      The size of the caller's private data  that must be\r
                               recorded for each write.\r
  @param  NumberOfWrites       The number of fault tolerant block writes  that will\r
                               need to occur.\r
\r
  @retval EFI_SUCCESS          The function completed successfully\r
  @retval EFI_ABORTED          The function could not complete successfully.\r
  @retval EFI_ACCESS_DENIED    All allocated writes have not been completed.   All\r
                               writes must be completed or aborted before  another\r
                               fault tolerant write can occur.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_FAULT_TOLERANT_WRITE_ALLOCATE) (\r
  IN EFI_FAULT_TOLERANT_WRITE_PROTOCOL    * This,\r
  IN EFI_GUID                             * CallerId,\r
  IN UINTN                                PrivateDataSize,\r
  IN UINTN                                NumberOfWrites\r
  );\r
\r
/**\r
  Starts a target block update. This records information about the write\r
  in fault tolerant storage and will complete the write in a recoverable\r
  manner, ensuring at all times that either the original contents or\r
  the modified contents are available.\r
\r
  @param  This                 Calling context\r
  @param  Lba                  The logical block address of the target block.\r
  @param  Offset               The offset within the target block to place the\r
                               data.\r
  @param  Length               The number of bytes to write to the target block.\r
  @param  PrivateData          A pointer to private data that the caller requires\r
                               to  complete any pending writes in the event of a\r
                               fault.\r
  @param  FvBlockHandle        The handle of FVB protocol that provides services\r
                               for  reading, writing, and erasing the target block.\r
  @param  Buffer               The data to write.\r
\r
  @retval EFI_SUCCESS          The function completed successfully\r
  @retval EFI_ABORTED          The function could not complete successfully.\r
  @retval EFI_BAD_BUFFER_SIZE  The write would span a block boundary,  which is not\r
                               a valid action.\r
  @retval EFI_ACCESS_DENIED    No writes have been allocated.\r
  @retval EFI_NOT_READY        The last write has not been completed.   Restart ()\r
                               must be called to complete it.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_FAULT_TOLERANT_WRITE_WRITE) (\r
  IN EFI_FAULT_TOLERANT_WRITE_PROTOCOL     * This,\r
  IN EFI_LBA                               Lba,\r
  IN UINTN                                 Offset,\r
  IN UINTN                                 Length,\r
  IN VOID                                  *PrivateData,\r
  IN EFI_HANDLE                            FvbHandle,\r
  IN VOID                                  *Buffer\r
  );\r
\r
/**\r
  Restarts a previously interrupted write. The caller must provide the\r
  block protocol needed to complete the interrupted write.\r
\r
  @param  This                 Calling context.\r
  @param  FvBlockProtocol      The handle of FVB protocol that provides services\r
                               for  reading, writing, and erasing the target block.\r
\r
  @retval EFI_SUCCESS          The function completed successfully\r
  @retval EFI_ABORTED          The function could not complete successfully.\r
  @retval EFI_ACCESS_DENIED    No pending writes exist.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_FAULT_TOLERANT_WRITE_RESTART) (\r
  IN EFI_FAULT_TOLERANT_WRITE_PROTOCOL     * This,\r
  IN EFI_HANDLE                            FvbHandle\r
  );\r
\r
/**\r
  Aborts all previous allocated writes.\r
\r
  @param  This                 Calling context\r
\r
  @retval EFI_SUCCESS          The function completed successfully\r
  @retval EFI_ABORTED          The function could not complete successfully.\r
  @retval EFI_NOT_FOUND        No allocated writes exist.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_FAULT_TOLERANT_WRITE_ABORT) (\r
  IN EFI_FAULT_TOLERANT_WRITE_PROTOCOL     * This\r
  );\r
\r
/**\r
  Starts a target block update. This records information about the write\r
  in fault tolerant storage and will complete the write in a recoverable\r
  manner, ensuring at all times that either the original contents or\r
  the modified contents are available.\r
\r
  @param  This                 Indicates a pointer to the calling context.\r
  @param  CallerId             The GUID identifying the last write.\r
  @param  Lba                  The logical block address of the last write.\r
  @param  Offset               The offset within the block of the last write.\r
  @param  Length               The length of the last write.\r
  @param  PrivateDataSize      On input, the size of the PrivateData buffer.   On\r
                               output, the size of the private data stored  for\r
                               this write.\r
  @param  PrivateData          A pointer to a buffer. The function will copy\r
                               PrivateDataSize bytes from the private data  stored\r
                               for this write.\r
  @param  Complete             A Boolean value with TRUE indicating  that the write\r
                               was completed.\r
\r
  @retval EFI_SUCCESS          The function completed successfully\r
  @retval EFI_ABORTED          The function could not complete successfully.\r
  @retval EFI_NOT_FOUND        No allocated writes exist.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_FAULT_TOLERANT_WRITE_GET_LAST_WRITE) (\r
  IN EFI_FAULT_TOLERANT_WRITE_PROTOCOL     * This,\r
  OUT EFI_GUID                             * CallerId,\r
  OUT EFI_LBA                              *Lba,\r
  OUT UINTN                                *Offset,\r
  OUT UINTN                                *Length,\r
  IN OUT UINTN                             *PrivateDataSize,\r
  OUT VOID                                 *PrivateData,\r
  OUT BOOLEAN                              *Complete\r
  );\r
\r
//\r
// Protocol declaration\r
//\r
struct _EFI_FAULT_TOLERANT_WRITE_PROTOCOL {\r
  EFI_FAULT_TOLERANT_WRITE_GET_MAX_BLOCK_SIZE GetMaxBlockSize;\r
  EFI_FAULT_TOLERANT_WRITE_ALLOCATE           Allocate;\r
  EFI_FAULT_TOLERANT_WRITE_WRITE              Write;\r
  EFI_FAULT_TOLERANT_WRITE_RESTART            Restart;\r
  EFI_FAULT_TOLERANT_WRITE_ABORT              Abort;\r
  EFI_FAULT_TOLERANT_WRITE_GET_LAST_WRITE     GetLastWrite;\r
};\r
\r
extern EFI_GUID gEfiFaultTolerantWriteProtocolGuid;\r
\r
#endif\r