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361 lines
14 KiB
C
361 lines
14 KiB
C
/** @file
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This file provides control over block-oriented firmware devices.
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Revision Reference: PI
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Version 1.0 and 1.2.
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**/
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#ifndef __FIRMWARE_VOLUME_BLOCK_H__
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#define __FIRMWARE_VOLUME_BLOCK_H__
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//
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// EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL is defined in PI 1.0 spec and its GUID value
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// is later updated to be the same as that of EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL
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// defined in PI 1.2 spec.
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//
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#define EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL_GUID \
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{ 0x8f644fa9, 0xe850, 0x4db1, {0x9c, 0xe2, 0xb, 0x44, 0x69, 0x8e, 0x8d, 0xa4 } }
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#define EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL_GUID \
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{ 0x8f644fa9, 0xe850, 0x4db1, {0x9c, 0xe2, 0xb, 0x44, 0x69, 0x8e, 0x8d, 0xa4 } }
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typedef struct _EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL;
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typedef EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL;
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/**
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The GetAttributes() function retrieves the attributes and
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current settings of the block.
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@param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
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@param Attributes Pointer to EFI_FVB_ATTRIBUTES_2 in which the
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attributes and current settings are
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returned. Type EFI_FVB_ATTRIBUTES_2 is defined
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in EFI_FIRMWARE_VOLUME_HEADER.
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@retval EFI_SUCCESS The firmware volume attributes were
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returned.
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**/
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typedef
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EFI_STATUS
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(EFIAPI * EFI_FVB_GET_ATTRIBUTES)(
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IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
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OUT EFI_FVB_ATTRIBUTES_2 *Attributes
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);
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/**
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The SetAttributes() function sets configurable firmware volume
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attributes and returns the new settings of the firmware volume.
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@param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
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@param Attributes On input, Attributes is a pointer to
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EFI_FVB_ATTRIBUTES_2 that contains the
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desired firmware volume settings. On
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successful return, it contains the new
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settings of the firmware volume. Type
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EFI_FVB_ATTRIBUTES_2 is defined in
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EFI_FIRMWARE_VOLUME_HEADER.
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@retval EFI_SUCCESS The firmware volume attributes were returned.
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@retval EFI_INVALID_PARAMETER The attributes requested are in
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conflict with the capabilities
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as declared in the firmware
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volume header.
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**/
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typedef
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EFI_STATUS
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(EFIAPI * EFI_FVB_SET_ATTRIBUTES)(
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IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
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IN OUT EFI_FVB_ATTRIBUTES_2 *Attributes
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);
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/**
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The GetPhysicalAddress() function retrieves the base address of
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a memory-mapped firmware volume. This function should be called
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only for memory-mapped firmware volumes.
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@param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
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@param Address Pointer to a caller-allocated
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EFI_PHYSICAL_ADDRESS that, on successful
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return from GetPhysicalAddress(), contains the
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base address of the firmware volume.
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@retval EFI_SUCCESS The firmware volume base address was returned.
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@retval EFI_UNSUPPORTED The firmware volume is not memory mapped.
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**/
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typedef
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EFI_STATUS
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(EFIAPI * EFI_FVB_GET_PHYSICAL_ADDRESS)(
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IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
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OUT EFI_PHYSICAL_ADDRESS *Address
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);
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/**
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The GetBlockSize() function retrieves the size of the requested
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block. It also returns the number of additional blocks with
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the identical size. The GetBlockSize() function is used to
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retrieve the block map (see EFI_FIRMWARE_VOLUME_HEADER).
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@param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
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@param Lba Indicates the block for which to return the size.
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@param BlockSize Pointer to a caller-allocated UINTN in which
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the size of the block is returned.
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@param NumberOfBlocks Pointer to a caller-allocated UINTN in
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which the number of consecutive blocks,
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starting with Lba, is returned. All
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blocks in this range have a size of
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BlockSize.
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@retval EFI_SUCCESS The firmware volume base address was returned.
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@retval EFI_INVALID_PARAMETER The requested LBA is out of range.
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**/
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typedef
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EFI_STATUS
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(EFIAPI * EFI_FVB_GET_BLOCK_SIZE)(
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IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
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IN EFI_LBA Lba,
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OUT UINTN *BlockSize,
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OUT UINTN *NumberOfBlocks
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);
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/**
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Reads the specified number of bytes into a buffer from the specified block.
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The Read() function reads the requested number of bytes from the
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requested block and stores them in the provided buffer.
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Implementations should be mindful that the firmware volume
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might be in the ReadDisabled state. If it is in this state,
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the Read() function must return the status code
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EFI_ACCESS_DENIED without modifying the contents of the
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buffer. The Read() function must also prevent spanning block
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boundaries. If a read is requested that would span a block
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boundary, the read must read up to the boundary but not
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beyond. The output parameter NumBytes must be set to correctly
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indicate the number of bytes actually read. The caller must be
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aware that a read may be partially completed.
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@param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
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@param Lba The starting logical block index
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from which to read.
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@param Offset Offset into the block at which to begin reading.
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@param NumBytes Pointer to a UINTN. At entry, *NumBytes
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contains the total size of the buffer. At
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exit, *NumBytes contains the total number of
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bytes read.
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@param Buffer Pointer to a caller-allocated buffer that will
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be used to hold the data that is read.
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@retval EFI_SUCCESS The firmware volume was read successfully,
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and contents are in Buffer.
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@retval EFI_BAD_BUFFER_SIZE Read attempted across an LBA
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boundary. On output, NumBytes
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contains the total number of bytes
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returned in Buffer.
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@retval EFI_ACCESS_DENIED The firmware volume is in the
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ReadDisabled state.
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@retval EFI_DEVICE_ERROR The block device is not
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functioning correctly and could
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not be read.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_FVB_READ)(
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IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
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IN EFI_LBA Lba,
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IN UINTN Offset,
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IN OUT UINTN *NumBytes,
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IN OUT UINT8 *Buffer
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);
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/**
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Writes the specified number of bytes from the input buffer to the block.
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The Write() function writes the specified number of bytes from
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the provided buffer to the specified block and offset. If the
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firmware volume is sticky write, the caller must ensure that
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all the bits of the specified range to write are in the
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EFI_FVB_ERASE_POLARITY state before calling the Write()
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function, or else the result will be unpredictable. This
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unpredictability arises because, for a sticky-write firmware
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volume, a write may negate a bit in the EFI_FVB_ERASE_POLARITY
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state but cannot flip it back again. Before calling the
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Write() function, it is recommended for the caller to first call
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the EraseBlocks() function to erase the specified block to
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write. A block erase cycle will transition bits from the
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(NOT)EFI_FVB_ERASE_POLARITY state back to the
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EFI_FVB_ERASE_POLARITY state. Implementations should be
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mindful that the firmware volume might be in the WriteDisabled
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state. If it is in this state, the Write() function must
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return the status code EFI_ACCESS_DENIED without modifying the
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contents of the firmware volume. The Write() function must
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also prevent spanning block boundaries. If a write is
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requested that spans a block boundary, the write must store up
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to the boundary but not beyond. The output parameter NumBytes
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must be set to correctly indicate the number of bytes actually
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written. The caller must be aware that a write may be
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partially completed. All writes, partial or otherwise, must be
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fully flushed to the hardware before the Write() service
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returns.
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@param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
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@param Lba The starting logical block index to write to.
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@param Offset Offset into the block at which to begin writing.
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@param NumBytes The pointer to a UINTN. At entry, *NumBytes
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contains the total size of the buffer. At
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exit, *NumBytes contains the total number of
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bytes actually written.
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@param Buffer The pointer to a caller-allocated buffer that
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contains the source for the write.
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@retval EFI_SUCCESS The firmware volume was written successfully.
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@retval EFI_BAD_BUFFER_SIZE The write was attempted across an
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LBA boundary. On output, NumBytes
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contains the total number of bytes
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actually written.
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@retval EFI_ACCESS_DENIED The firmware volume is in the
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WriteDisabled state.
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@retval EFI_DEVICE_ERROR The block device is malfunctioning
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and could not be written.
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**/
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typedef
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EFI_STATUS
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(EFIAPI * EFI_FVB_WRITE)(
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IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
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IN EFI_LBA Lba,
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IN UINTN Offset,
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IN OUT UINTN *NumBytes,
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IN UINT8 *Buffer
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);
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///
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/// EFI_LBA_LIST_TERMINATOR
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///
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#define EFI_LBA_LIST_TERMINATOR 0xFFFFFFFFFFFFFFFFULL
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/**
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Erases and initializes a firmware volume block.
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The EraseBlocks() function erases one or more blocks as denoted
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by the variable argument list. The entire parameter list of
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blocks must be verified before erasing any blocks. If a block is
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requested that does not exist within the associated firmware
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volume (it has a larger index than the last block of the
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firmware volume), the EraseBlocks() function must return the
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status code EFI_INVALID_PARAMETER without modifying the contents
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of the firmware volume. Implementations should be mindful that
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the firmware volume might be in the WriteDisabled state. If it
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is in this state, the EraseBlocks() function must return the
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status code EFI_ACCESS_DENIED without modifying the contents of
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the firmware volume. All calls to EraseBlocks() must be fully
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flushed to the hardware before the EraseBlocks() service
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returns.
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@param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL
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instance.
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@param ... The variable argument list is a list of tuples.
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Each tuple describes a range of LBAs to erase
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and consists of the following:
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- An EFI_LBA that indicates the starting LBA
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- A UINTN that indicates the number of blocks to
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erase.
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The list is terminated with an
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EFI_LBA_LIST_TERMINATOR. For example, the
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following indicates that two ranges of blocks
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(5-7 and 10-11) are to be erased: EraseBlocks
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(This, 5, 3, 10, 2, EFI_LBA_LIST_TERMINATOR);
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@retval EFI_SUCCESS The erase request successfully
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completed.
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@retval EFI_ACCESS_DENIED The firmware volume is in the
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WriteDisabled state.
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@retval EFI_DEVICE_ERROR The block device is not functioning
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correctly and could not be written.
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The firmware device may have been
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partially erased.
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@retval EFI_INVALID_PARAMETER One or more of the LBAs listed
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in the variable argument list do
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not exist in the firmware volume.
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**/
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typedef
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EFI_STATUS
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(EFIAPI * EFI_FVB_ERASE_BLOCKS)(
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IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
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...
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);
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///
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/// The Firmware Volume Block Protocol is the low-level interface
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/// to a firmware volume. File-level access to a firmware volume
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/// should not be done using the Firmware Volume Block Protocol.
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/// Normal access to a firmware volume must use the Firmware
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/// Volume Protocol. Typically, only the file system driver that
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/// produces the Firmware Volume Protocol will bind to the
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/// Firmware Volume Block Protocol.
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///
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struct _EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL{
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EFI_FVB_GET_ATTRIBUTES GetAttributes;
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EFI_FVB_SET_ATTRIBUTES SetAttributes;
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EFI_FVB_GET_PHYSICAL_ADDRESS GetPhysicalAddress;
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EFI_FVB_GET_BLOCK_SIZE GetBlockSize;
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EFI_FVB_READ Read;
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EFI_FVB_WRITE Write;
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EFI_FVB_ERASE_BLOCKS EraseBlocks;
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///
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/// The handle of the parent firmware volume.
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///
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EFI_HANDLE ParentHandle;
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};
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extern EFI_GUID gEfiFirmwareVolumeBlockProtocolGuid;
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extern EFI_GUID gEfiFirmwareVolumeBlock2ProtocolGuid;
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#endif
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