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428 lines
16 KiB
C
428 lines
16 KiB
C
/** @file
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Firmware File System protocol. Layers on top of Firmware
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Block protocol to produce a file abstraction of FV based files.
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Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef __FW_VOL_DRIVER_H_
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#define __FW_VOL_DRIVER_H_
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#define FV2_DEVICE_SIGNATURE SIGNATURE_32 ('_', 'F', 'V', '2')
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//
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// Used to track all non-deleted files
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//
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typedef struct {
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LIST_ENTRY Link;
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EFI_FFS_FILE_HEADER *FfsHeader;
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UINTN StreamHandle;
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} FFS_FILE_LIST_ENTRY;
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typedef struct {
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UINTN Signature;
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EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;
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EFI_HANDLE Handle;
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EFI_FIRMWARE_VOLUME2_PROTOCOL Fv;
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EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;
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UINT8 *CachedFv;
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UINT8 *EndOfCachedFv;
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FFS_FILE_LIST_ENTRY *LastKey;
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LIST_ENTRY FfsFileListHeader;
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UINT8 ErasePolarity;
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BOOLEAN IsFfs3Fv;
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UINT32 AuthenticationStatus;
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} FV_DEVICE;
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#define FV_DEVICE_FROM_THIS(a) CR(a, FV_DEVICE, Fv, FV2_DEVICE_SIGNATURE)
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/**
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Retrieves attributes, insures positive polarity of attribute bits, returns
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resulting attributes in output parameter.
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@param This Pointer to EFI_FIRMWARE_VOLUME2_PROTOCOL.
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@param Attributes output buffer which contains attributes.
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@retval EFI_SUCCESS Successfully got volume attributes.
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**/
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EFI_STATUS
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EFIAPI
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FvGetVolumeAttributes (
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IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
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OUT EFI_FV_ATTRIBUTES *Attributes
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);
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/**
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Sets current attributes for volume
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@param This Pointer to EFI_FIRMWARE_VOLUME2_PROTOCOL.
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@param Attributes At input, contains attributes to be set. At output
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contains new value of FV.
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@retval EFI_UNSUPPORTED Could not be set.
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**/
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EFI_STATUS
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EFIAPI
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FvSetVolumeAttributes (
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IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
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IN OUT EFI_FV_ATTRIBUTES *Attributes
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);
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/**
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Given the input key, search for the next matching file in the volume.
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@param This Pointer to EFI_FIRMWARE_VOLUME2_PROTOCOL.
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@param Key Key is a pointer to a caller allocated
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buffer that contains implementation specific
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data that is used to track where to begin
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the search for the next file. The size of
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the buffer must be at least This->KeySize
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bytes long. To reinitialize the search and
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begin from the beginning of the firmware
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volume, the entire buffer must be cleared to
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zero. Other than clearing the buffer to
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initiate a new search, the caller must not
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modify the data in the buffer between calls
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to GetNextFile().
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@param FileType FileType is a pointer to a caller allocated
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EFI_FV_FILETYPE. The GetNextFile() API can
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filter it's search for files based on the
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value of *FileType input. A *FileType input
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of 0 causes GetNextFile() to search for
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files of all types. If a file is found, the
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file's type is returned in *FileType.
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*FileType is not modified if no file is
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found.
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@param NameGuid NameGuid is a pointer to a caller allocated
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EFI_GUID. If a file is found, the file's
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name is returned in *NameGuid. *NameGuid is
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not modified if no file is found.
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@param Attributes Attributes is a pointer to a caller
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allocated EFI_FV_FILE_ATTRIBUTES. If a file
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is found, the file's attributes are returned
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in *Attributes. *Attributes is not modified
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if no file is found.
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@param Size Size is a pointer to a caller allocated
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UINTN. If a file is found, the file's size
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is returned in *Size. *Size is not modified
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if no file is found.
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@retval EFI_SUCCESS Successfully find the file.
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@retval EFI_DEVICE_ERROR Device error.
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@retval EFI_ACCESS_DENIED Fv could not read.
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@retval EFI_NOT_FOUND No matching file found.
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@retval EFI_INVALID_PARAMETER Invalid parameter
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**/
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EFI_STATUS
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EFIAPI
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FvGetNextFile (
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IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
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IN OUT VOID *Key,
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IN OUT EFI_FV_FILETYPE *FileType,
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OUT EFI_GUID *NameGuid,
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OUT EFI_FV_FILE_ATTRIBUTES *Attributes,
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OUT UINTN *Size
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);
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/**
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Locates a file in the firmware volume and
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copies it to the supplied buffer.
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@param This Pointer to EFI_FIRMWARE_VOLUME2_PROTOCOL.
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@param NameGuid Pointer to an EFI_GUID, which is the
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filename.
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@param Buffer Buffer is a pointer to pointer to a buffer
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in which the file or section contents or are
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returned.
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@param BufferSize BufferSize is a pointer to caller allocated
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UINTN. On input *BufferSize indicates the
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size in bytes of the memory region pointed
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to by Buffer. On output, *BufferSize
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contains the number of bytes required to
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read the file.
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@param FoundType FoundType is a pointer to a caller allocated
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EFI_FV_FILETYPE that on successful return
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from Read() contains the type of file read.
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This output reflects the file type
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irrespective of the value of the SectionType
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input.
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@param FileAttributes FileAttributes is a pointer to a caller
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allocated EFI_FV_FILE_ATTRIBUTES. On
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successful return from Read(),
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*FileAttributes contains the attributes of
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the file read.
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@param AuthenticationStatus AuthenticationStatus is a pointer to a
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caller allocated UINTN in which the
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authentication status is returned.
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@retval EFI_SUCCESS Successfully read to memory buffer.
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@retval EFI_WARN_BUFFER_TOO_SMALL Buffer too small.
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@retval EFI_NOT_FOUND Not found.
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@retval EFI_DEVICE_ERROR Device error.
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@retval EFI_ACCESS_DENIED Could not read.
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@retval EFI_INVALID_PARAMETER Invalid parameter.
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@retval EFI_OUT_OF_RESOURCES Not enough buffer to be allocated.
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**/
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EFI_STATUS
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EFIAPI
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FvReadFile (
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IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
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IN CONST EFI_GUID *NameGuid,
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IN OUT VOID **Buffer,
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IN OUT UINTN *BufferSize,
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OUT EFI_FV_FILETYPE *FoundType,
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OUT EFI_FV_FILE_ATTRIBUTES *FileAttributes,
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OUT UINT32 *AuthenticationStatus
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);
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/**
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Locates a section in a given FFS File and
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copies it to the supplied buffer (not including section header).
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@param This Pointer to EFI_FIRMWARE_VOLUME2_PROTOCOL.
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@param NameGuid Pointer to an EFI_GUID, which is the
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filename.
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@param SectionType Indicates the section type to return.
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@param SectionInstance Indicates which instance of sections with a
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type of SectionType to return.
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@param Buffer Buffer is a pointer to pointer to a buffer
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in which the file or section contents or are
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returned.
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@param BufferSize BufferSize is a pointer to caller allocated
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UINTN.
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@param AuthenticationStatus AuthenticationStatus is a pointer to a
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caller allocated UINT32 in which the
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authentication status is returned.
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@retval EFI_SUCCESS Successfully read the file section into
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buffer.
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@retval EFI_WARN_BUFFER_TOO_SMALL Buffer too small.
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@retval EFI_NOT_FOUND Section not found.
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@retval EFI_DEVICE_ERROR Device error.
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@retval EFI_ACCESS_DENIED Could not read.
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@retval EFI_INVALID_PARAMETER Invalid parameter.
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**/
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EFI_STATUS
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EFIAPI
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FvReadFileSection (
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IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
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IN CONST EFI_GUID *NameGuid,
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IN EFI_SECTION_TYPE SectionType,
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IN UINTN SectionInstance,
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IN OUT VOID **Buffer,
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IN OUT UINTN *BufferSize,
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OUT UINT32 *AuthenticationStatus
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);
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/**
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Writes one or more files to the firmware volume.
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@param This Pointer to EFI_FIRMWARE_VOLUME2_PROTOCOL.
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@param NumberOfFiles Number of files.
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@param WritePolicy WritePolicy indicates the level of reliability
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for the write in the event of a power failure or
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other system failure during the write operation.
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@param FileData FileData is an pointer to an array of
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EFI_FV_WRITE_DATA. Each element of array
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FileData represents a file to be written.
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@retval EFI_SUCCESS Files successfully written to firmware volume
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@retval EFI_OUT_OF_RESOURCES Not enough buffer to be allocated.
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@retval EFI_DEVICE_ERROR Device error.
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@retval EFI_WRITE_PROTECTED Write protected.
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@retval EFI_NOT_FOUND Not found.
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@retval EFI_INVALID_PARAMETER Invalid parameter.
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@retval EFI_UNSUPPORTED This function not supported.
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**/
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EFI_STATUS
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EFIAPI
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FvWriteFile (
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IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
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IN UINT32 NumberOfFiles,
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IN EFI_FV_WRITE_POLICY WritePolicy,
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IN EFI_FV_WRITE_FILE_DATA *FileData
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);
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/**
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Return information of type InformationType for the requested firmware
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volume.
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@param This Pointer to EFI_FIRMWARE_VOLUME2_PROTOCOL.
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@param InformationType InformationType for requested.
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@param BufferSize On input, size of Buffer.On output, the amount of data
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returned in Buffer.
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@param Buffer A poniter to the data buffer to return.
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@retval EFI_SUCCESS Successfully got volume Information.
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**/
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EFI_STATUS
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EFIAPI
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FvGetVolumeInfo (
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IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
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IN CONST EFI_GUID *InformationType,
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IN OUT UINTN *BufferSize,
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OUT VOID *Buffer
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);
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/**
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Set information of type InformationType for the requested firmware
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volume.
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@param This Pointer to EFI_FIRMWARE_VOLUME2_PROTOCOL.
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@param InformationType InformationType for requested.
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@param BufferSize On input, size of Buffer.On output, the amount of data
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returned in Buffer.
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@param Buffer A poniter to the data buffer to return.
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@retval EFI_SUCCESS Successfully set volume Information.
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**/
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EFI_STATUS
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EFIAPI
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FvSetVolumeInfo (
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IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
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IN CONST EFI_GUID *InformationType,
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IN UINTN BufferSize,
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IN CONST VOID *Buffer
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);
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/**
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Check if a block of buffer is erased.
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@param ErasePolarity Erase polarity attribute of the firmware volume
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@param InBuffer The buffer to be checked
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@param BufferSize Size of the buffer in bytes
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@retval TRUE The block of buffer is erased
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@retval FALSE The block of buffer is not erased
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**/
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BOOLEAN
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IsBufferErased (
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IN UINT8 ErasePolarity,
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IN VOID *InBuffer,
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IN UINTN BufferSize
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);
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/**
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Get the FFS file state by checking the highest bit set in the header's state field.
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@param ErasePolarity Erase polarity attribute of the firmware volume
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@param FfsHeader Points to the FFS file header
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@return FFS File state
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**/
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EFI_FFS_FILE_STATE
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GetFileState (
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IN UINT8 ErasePolarity,
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IN EFI_FFS_FILE_HEADER *FfsHeader
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);
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/**
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Set the FFS file state.
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@param State The state to be set.
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@param FfsHeader Points to the FFS file header
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@return None.
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**/
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VOID
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SetFileState (
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IN UINT8 State,
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IN EFI_FFS_FILE_HEADER *FfsHeader
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);
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/**
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Check if it's a valid FFS file header.
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@param ErasePolarity Erase polarity attribute of the firmware volume
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@param FfsHeader Points to the FFS file header to be checked
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@param FileState FFS file state to be returned
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@retval TRUE Valid FFS file header
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@retval FALSE Invalid FFS file header
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**/
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BOOLEAN
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IsValidFfsHeader (
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IN UINT8 ErasePolarity,
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IN EFI_FFS_FILE_HEADER *FfsHeader,
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OUT EFI_FFS_FILE_STATE *FileState
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);
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/**
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Check if it's a valid FFS file.
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Here we are sure that it has a valid FFS file header since we must call IsValidFfsHeader() first.
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@param ErasePolarity Erase polarity attribute of the firmware volume
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@param FfsHeader Points to the FFS file to be checked
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@retval TRUE Valid FFS file
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@retval FALSE Invalid FFS file
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**/
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BOOLEAN
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IsValidFfsFile (
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IN UINT8 ErasePolarity,
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IN EFI_FFS_FILE_HEADER *FfsHeader
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);
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/**
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given the supplied FW_VOL_BLOCK_PROTOCOL, allocate a buffer for output and
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copy the volume header into it.
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@param Fvb The FW_VOL_BLOCK_PROTOCOL instance from which to
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read the volume header
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@param FwVolHeader Pointer to pointer to allocated buffer in which
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the volume header is returned.
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@retval EFI_OUT_OF_RESOURCES No enough buffer could be allocated.
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@retval EFI_SUCCESS Successfully read volume header to the allocated
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buffer.
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**/
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EFI_STATUS
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GetFwVolHeader (
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IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb,
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OUT EFI_FIRMWARE_VOLUME_HEADER **FwVolHeader
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);
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#endif
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