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MdePkg: Add a new DxeServicesLib GetFileDevicePathFromAnyFv () function 

Contributed-under: TianoCore Contribution Agreement 1.0
From: Shia Cinnamon <cinnamon.shia@hpe.com>
Signed-off-by: Wang Nickle <nickle.wang@hpe.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18655 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Shia Cinnamon 2015-10-23 05:53:08 +00:00 committed by erictian
parent 9b18845a4b
commit 711ef3f624
2 changed files with 199 additions and 0 deletions
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43
MdePkg/Include/Library/DxeServicesLib.h
View File

@ -3,6 +3,7 @@
These functions help access data from sections of FFS files or from file path.
Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that accompanies this distribution.
The full text of the license may be found at
@ -262,5 +263,47 @@ GetFileBufferByFilePath (
OUT UINT32 *AuthenticationStatus
);
/**
Searches all the available firmware volumes and returns the file device path of first matching
FFS section.
This function searches all the firmware volumes for FFS files with an FFS filename specified by NameGuid.
The order that the firmware volumes is searched is not deterministic. For each FFS file found a search
is made for FFS sections of type SectionType.
If SectionType is EFI_SECTION_TE, and the search with an FFS file fails,
the search will be retried with a section type of EFI_SECTION_PE32.
This function must be called with a TPL <= TPL_NOTIFY.
If NameGuid is NULL, then ASSERT().
@param NameGuid A pointer to to the FFS filename GUID to search for
within any of the firmware volumes in the platform.
@param SectionType Indicates the FFS section type to search for within
the FFS file specified by NameGuid.
@param SectionInstance Indicates which section instance within the FFS file
specified by NameGuid to retrieve.
@param FvFileDevicePath Device path for the target FFS
file.
@retval EFI_SUCCESS The specified file device path of FFS section was returned.
@retval EFI_NOT_FOUND The specified file device path of FFS section could not be found.
@retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a
device error.
@retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the
firmware volume that contains the matching FFS section does not
allow reads.
@retval EFI_INVALID_PARAMETER FvFileDevicePath is NULL.
**/
EFI_STATUS
EFIAPI
GetFileDevicePathFromAnyFv (
IN CONST EFI_GUID *NameGuid,
IN EFI_SECTION_TYPE SectionType,
IN UINTN SectionInstance,
OUT EFI_DEVICE_PATH_PROTOCOL **FvFileDevicePath
);
#endif

156
MdePkg/Library/DxeServicesLib/DxeServicesLib.c
View File

@ -3,6 +3,7 @@
These functions help access data from sections of FFS files or from file path.
Copyright (c) 2007 - 2015, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>
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
@ -927,3 +928,158 @@ Finish:
return ImageBuffer;
}
/**
Searches all the available firmware volumes and returns the file device path of first matching
FFS section.
This function searches all the firmware volumes for FFS files with an FFS filename specified by NameGuid.
The order that the firmware volumes is searched is not deterministic. For each FFS file found a search
is made for FFS sections of type SectionType.
If SectionType is EFI_SECTION_TE, and the search with an FFS file fails,
the search will be retried with a section type of EFI_SECTION_PE32.
This function must be called with a TPL <= TPL_NOTIFY.
If NameGuid is NULL, then ASSERT().
@param NameGuid A pointer to to the FFS filename GUID to search for
within any of the firmware volumes in the platform.
@param SectionType Indicates the FFS section type to search for within
the FFS file specified by NameGuid.
@param SectionInstance Indicates which section instance within the FFS file
specified by NameGuid to retrieve.
@param FvFileDevicePath Device path for the target FFS
file.
@retval EFI_SUCCESS The specified file device path of FFS section was returned.
@retval EFI_NOT_FOUND The specified file device path of FFS section could not be found.
@retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a
device error.
@retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the
firmware volume that contains the matching FFS section does not
allow reads.
@retval EFI_INVALID_PARAMETER FvFileDevicePath is NULL.
**/
EFI_STATUS
EFIAPI
GetFileDevicePathFromAnyFv (
IN CONST EFI_GUID *NameGuid,
IN EFI_SECTION_TYPE SectionType,
IN UINTN SectionInstance,
OUT EFI_DEVICE_PATH_PROTOCOL **FvFileDevicePath
)
{
EFI_STATUS Status;
EFI_HANDLE *HandleBuffer;
UINTN HandleCount;
UINTN Index;
EFI_HANDLE FvHandle;
EFI_DEVICE_PATH_PROTOCOL *FvDevicePath;
MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *TempFvFileDevicePath;
VOID *Buffer;
UINTN Size;
if (FvFileDevicePath == NULL) {
return EFI_INVALID_PARAMETER;
}
HandleBuffer = NULL;
FvDevicePath = NULL;
TempFvFileDevicePath = NULL;
Buffer = NULL;
Size = 0;
//
// Search the FV that contain the caller's FFS first.
// FV builder can choose to build FFS into the this FV
// so that this implementation of GetSectionFromAnyFv
// will locate the FFS faster.
//
FvHandle = InternalImageHandleToFvHandle (gImageHandle);
Status = InternalGetSectionFromFv (
FvHandle,
NameGuid,
SectionType,
SectionInstance,
&Buffer,
&Size
);
if (!EFI_ERROR (Status)) {
goto Done;
}
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiFirmwareVolume2ProtocolGuid,
NULL,
&HandleCount,
&HandleBuffer
);
if (EFI_ERROR (Status)) {
goto Done;
}
for (Index = 0; Index < HandleCount; Index++) {
//
// Skip the FV that contain the caller's FFS
//
if (HandleBuffer[Index] != FvHandle) {
Status = InternalGetSectionFromFv (
HandleBuffer[Index],
NameGuid,
SectionType,
SectionInstance,
&Buffer,
&Size
);
if (!EFI_ERROR (Status)) {
//
// Update FvHandle to the current handle.
//
FvHandle = HandleBuffer[Index];
goto Done;
}
}
}
if (Index == HandleCount) {
Status = EFI_NOT_FOUND;
}
Done:
if (Status == EFI_SUCCESS) {
//
// Build a device path to the file in the FV to pass into gBS->LoadImage
//
Status = gBS->HandleProtocol (FvHandle, &gEfiDevicePathProtocolGuid, (VOID **)&FvDevicePath);
if (EFI_ERROR (Status)) {
*FvFileDevicePath = NULL;
} else {
TempFvFileDevicePath = AllocateZeroPool (sizeof (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH) + END_DEVICE_PATH_LENGTH);
if (TempFvFileDevicePath == NULL) {
*FvFileDevicePath = NULL;
return EFI_OUT_OF_RESOURCES;
}
EfiInitializeFwVolDevicepathNode ((MEDIA_FW_VOL_FILEPATH_DEVICE_PATH*)TempFvFileDevicePath, NameGuid);
SetDevicePathEndNode (NextDevicePathNode (TempFvFileDevicePath));
*FvFileDevicePath = AppendDevicePath (
FvDevicePath,
(EFI_DEVICE_PATH_PROTOCOL *)TempFvFileDevicePath
);
FreePool (TempFvFileDevicePath);
}
}
if (Buffer != NULL) {
FreePool (Buffer);
}
if (HandleBuffer != NULL) {
FreePool (HandleBuffer);
}
return Status;
}