MdeModulePkg/Core/Dxe/FwVolBlock/FwVolBlock.h

/** @file
  Firmware Volume Block protocol functions.
  Consumes FV hobs and creates appropriate block protocols.

Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef _FWVOL_BLOCK_H_
#define _FWVOL_BLOCK_H_

#define FVB_DEVICE_SIGNATURE  SIGNATURE_32('_','F','V','B')

typedef struct {
  UINTN    Base;
  UINTN    Length;
} LBA_CACHE;

typedef struct {
  MEMMAP_DEVICE_PATH          MemMapDevPath;
  EFI_DEVICE_PATH_PROTOCOL    EndDevPath;
} FV_MEMMAP_DEVICE_PATH;

//
// UEFI Specification define FV device path format if FV provide name guid in extension header
//
typedef struct {
  MEDIA_FW_VOL_DEVICE_PATH    FvDevPath;
  EFI_DEVICE_PATH_PROTOCOL    EndDevPath;
} FV_PIWG_DEVICE_PATH;

typedef struct {
  UINTN                                 Signature;
  EFI_HANDLE                            Handle;
  EFI_DEVICE_PATH_PROTOCOL              *DevicePath;
  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL    FwVolBlockInstance;
  UINTN                                 NumBlocks;
  LBA_CACHE                             *LbaCache;
  UINT32                                FvbAttributes;
  EFI_PHYSICAL_ADDRESS                  BaseAddress;
  UINT32                                AuthenticationStatus;
} EFI_FW_VOL_BLOCK_DEVICE;

#define FVB_DEVICE_FROM_THIS(a) \
  CR(a, EFI_FW_VOL_BLOCK_DEVICE, FwVolBlockInstance, FVB_DEVICE_SIGNATURE)

/**
  Retrieves Volume attributes.  No polarity translations are done.

  @param  This                   Calling context
  @param  Attributes             output buffer which contains attributes

  @retval EFI_SUCCESS            The firmware volume attributes were returned.

**/
EFI_STATUS
EFIAPI
FwVolBlockGetAttributes (
  IN CONST  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *This,
  OUT       EFI_FVB_ATTRIBUTES_2                *Attributes
  );

/**
  Modifies the current settings of the firmware volume according to the input parameter.

  @param  This                   Calling context
  @param  Attributes             input buffer which contains attributes

  @retval EFI_SUCCESS            The firmware volume attributes were returned.
  @retval EFI_INVALID_PARAMETER  The attributes requested are in conflict with
                                 the capabilities as declared in the firmware
                                 volume header.
  @retval EFI_UNSUPPORTED        Not supported.

**/
EFI_STATUS
EFIAPI
FwVolBlockSetAttributes (
  IN CONST  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *This,
  IN CONST  EFI_FVB_ATTRIBUTES_2                *Attributes
  );

/**
  The EraseBlock() function erases one or more blocks as denoted by the
  variable argument list. The entire parameter list of blocks must be verified
  prior to erasing any blocks.  If a block is requested that does not exist
  within the associated firmware volume (it has a larger index than the last
  block of the firmware volume), the EraseBlock() function must return
  EFI_INVALID_PARAMETER without modifying the contents of the firmware volume.

  @param  This                   Calling context
  @param  ...                    Starting LBA followed by Number of Lba to erase.
                                 a -1 to terminate the list.

  @retval EFI_SUCCESS            The erase request was successfully completed.
  @retval EFI_ACCESS_DENIED      The firmware volume is in the WriteDisabled
                                 state.
  @retval EFI_DEVICE_ERROR       The block device is not functioning correctly
                                 and could not be written. The firmware device
                                 may have been partially erased.
  @retval EFI_INVALID_PARAMETER  One or more of the LBAs listed in the variable
                                 argument list do
  @retval EFI_UNSUPPORTED        Not supported.

**/
EFI_STATUS
EFIAPI
FwVolBlockEraseBlock (
  IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *This,
  ...
  );

/**
  Read the specified number of bytes from the block to the input buffer.

  @param  This                   Indicates the calling context.
  @param  Lba                    The starting logical block index to read.
  @param  Offset                 Offset into the block at which to begin reading.
  @param  NumBytes               Pointer to a UINT32. At entry, *NumBytes
                                 contains the total size of the buffer. At exit,
                                 *NumBytes contains the total number of bytes
                                 actually read.
  @param  Buffer                 Pinter to a caller-allocated buffer that
                                 contains the destine for the read.

  @retval EFI_SUCCESS            The firmware volume was read successfully.
  @retval EFI_BAD_BUFFER_SIZE    The read was attempted across an LBA boundary.
  @retval EFI_ACCESS_DENIED      Access denied.
  @retval EFI_DEVICE_ERROR       The block device is malfunctioning and could not
                                 be read.

**/
EFI_STATUS
EFIAPI
FwVolBlockReadBlock (
  IN CONST  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *This,
  IN CONST  EFI_LBA                             Lba,
  IN CONST  UINTN                               Offset,
  IN OUT    UINTN                               *NumBytes,
  IN OUT    UINT8                               *Buffer
  );

/**
  Writes the specified number of bytes from the input buffer to the block.

  @param  This                   Indicates the calling context.
  @param  Lba                    The starting logical block index to write to.
  @param  Offset                 Offset into the block at which to begin writing.
  @param  NumBytes               Pointer to a UINT32. At entry, *NumBytes
                                 contains the total size of the buffer. At exit,
                                 *NumBytes contains the total number of bytes
                                 actually written.
  @param  Buffer                 Pinter to a caller-allocated buffer that
                                 contains the source for the write.

  @retval EFI_SUCCESS            The firmware volume was written successfully.
  @retval EFI_BAD_BUFFER_SIZE    The write was attempted across an LBA boundary.
                                 On output, NumBytes contains the total number of
                                 bytes actually written.
  @retval EFI_ACCESS_DENIED      The firmware volume is in the WriteDisabled
                                 state.
  @retval EFI_DEVICE_ERROR       The block device is malfunctioning and could not
                                 be written.
  @retval EFI_UNSUPPORTED        Not supported.

**/
EFI_STATUS
EFIAPI
FwVolBlockWriteBlock (
  IN     EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *This,
  IN     EFI_LBA                             Lba,
  IN     UINTN                               Offset,
  IN OUT UINTN                               *NumBytes,
  IN     UINT8                               *Buffer
  );

/**
  Get Fvb's base address.

  @param  This                   Indicates the calling context.
  @param  Address                Fvb device base address.

  @retval EFI_SUCCESS            Successfully got Fvb's base address.
  @retval EFI_UNSUPPORTED        Not supported.

**/
EFI_STATUS
EFIAPI
FwVolBlockGetPhysicalAddress (
  IN CONST  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *This,
  OUT       EFI_PHYSICAL_ADDRESS                *Address
  );

/**
  Retrieves the size in bytes of a specific block within a firmware volume.

  @param  This                   Indicates the calling context.
  @param  Lba                    Indicates the block for which to return the
                                 size.
  @param  BlockSize              Pointer to a caller-allocated UINTN in which the
                                 size of the block is returned.
  @param  NumberOfBlocks         Pointer to a caller-allocated UINTN in which the
                                 number of consecutive blocks starting with Lba
                                 is returned. All blocks in this range have a
                                 size of BlockSize.

  @retval EFI_SUCCESS            The firmware volume base address is returned.
  @retval EFI_INVALID_PARAMETER  The requested LBA is out of range.

**/
EFI_STATUS
EFIAPI
FwVolBlockGetBlockSize (
  IN CONST  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *This,
  IN CONST  EFI_LBA                             Lba,
  IN OUT    UINTN                               *BlockSize,
  IN OUT    UINTN                               *NumberOfBlocks
  );

#endif