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audk/FmpDevicePkg/FmpDxe/FmpDxe.c

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/** @file
Produces a Firmware Management Protocol that supports updates to a firmware
image stored in a firmware device with platform and firmware device specific
information provided through PCDs and libraries.
Copyright (c) 2016, Microsoft Corporation. All rights reserved.<BR>
Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**/
#include <PiDxe.h>
#include <Library/DebugLib.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiLib.h>
#include <Library/FmpAuthenticationLib.h>
#include <Library/FmpDeviceLib.h>
#include <Library/FmpPayloadHeaderLib.h>
#include <Library/CapsuleUpdatePolicyLib.h>
#include <Protocol/FirmwareManagement.h>
#include <Protocol/FirmwareManagementProgress.h>
#include <Guid/SystemResourceTable.h>
#include <Guid/EventGroup.h>
#include "VariableSupport.h"
#define VERSION_STRING_NOT_SUPPORTED L"VERSION STRING NOT SUPPORTED"
#define VERSION_STRING_NOT_AVAILABLE L"VERSION STRING NOT AVAILABLE"
/**
Check to see if any of the keys in PcdFmpDevicePkcs7CertBufferXdr matches
the test key. PcdFmpDeviceTestKeySha256Digest contains the SHA256 hash of
the test key. For each key in PcdFmpDevicePkcs7CertBufferXdr, compute the
SHA256 hash and compare it to PcdFmpDeviceTestKeySha256Digest. If the
SHA256 hash matches or there is then error computing the SHA256 hash, then
set PcdTestKeyUsed to TRUE. Skip this check if PcdTestKeyUsed is already
TRUE or PcdFmpDeviceTestKeySha256Digest is not exactly SHA256_DIGEST_SIZE
bytes.
**/
VOID
DetectTestKey (
VOID
);
///
/// FILE_GUID from FmpDxe.inf. When FmpDxe.inf is used in a platform, the
/// FILE_GUID must always be overridden in the <Defines> section to provide
/// the ESRT GUID value associated with the updatable firmware image. A
/// check is made in this module's driver entry point to verify that a
/// new FILE_GUID value has been defined.
///
const EFI_GUID mDefaultModuleFileGuid = {
0x78ef0a56, 0x1cf0, 0x4535, { 0xb5, 0xda, 0xf6, 0xfd, 0x2f, 0x40, 0x5a, 0x11 }
};
EFI_FIRMWARE_IMAGE_DESCRIPTOR mDesc;
BOOLEAN mDescriptorPopulated = FALSE;
BOOLEAN mRuntimeVersionSupported = TRUE;
BOOLEAN mFmpInstalled = FALSE;
///
/// Function pointer to progress function
///
EFI_FIRMWARE_MANAGEMENT_UPDATE_IMAGE_PROGRESS mProgressFunc = NULL;
BOOLEAN mProgressSupported = FALSE;
CHAR16 *mImageIdName = NULL;
UINT64 mImageId = 0x1;
CHAR16 *mVersionName = NULL;
EFI_EVENT mFmpDeviceLockEvent;
//
// Indicates if an attempt has been made to lock a
// FLASH storage device by calling FmpDeviceLock().
// A FLASH storage device may not support being locked,
// so this variable is set to TRUE even if FmpDeviceLock()
// returns an error.
//
BOOLEAN mFmpDeviceLocked = FALSE;
/**
Callback function to report the process of the firmware updating.
Wrap the caller's version in this so that progress from the device lib is
within the expected range. Convert device lib 0% - 100% to 6% - 98%.
FmpDxe 1% - 5% for validation
FmpDeviceLib 6% - 98% for flashing/update
FmpDxe 99% - 100% finish
@param[in] Completion A value between 1 and 100 indicating the current
completion progress of the firmware update. Completion
progress is reported as from 1 to 100 percent. A value
of 0 is used by the driver to indicate that progress
reporting is not supported.
@retval EFI_SUCCESS The progress was updated.
@retval EFI_UNSUPPORTED Updating progress is not supported.
**/
EFI_STATUS
EFIAPI
FmpDxeProgress (
IN UINTN Completion
)
{
EFI_STATUS Status;
Status = EFI_UNSUPPORTED;
if (!mProgressSupported) {
return Status;
}
if (mProgressFunc == NULL) {
return Status;
}
//
// Reserve 6% - 98% for the FmpDeviceLib. Call the real progress function.
//
Status = mProgressFunc (((Completion * 92) / 100) + 6);
if (Status == EFI_UNSUPPORTED) {
mProgressSupported = FALSE;
mProgressFunc = NULL;
}
return Status;
}
/**
Returns a pointer to the ImageTypeId GUID value. An attempt is made to get
the GUID value from the FmpDeviceLib. If the FmpDeviceLib does not provide
a GUID value, then gEfiCallerIdGuid is returned.
@return The ImageTypeId GUID
**/
EFI_GUID *
GetImageTypeIdGuid (
VOID
)
{
EFI_STATUS Status;
EFI_GUID *FmpDeviceLibGuid;
FmpDeviceLibGuid = NULL;
Status = FmpDeviceGetImageTypeIdGuidPtr (&FmpDeviceLibGuid);
if (EFI_ERROR (Status)) {
if (Status != EFI_UNSUPPORTED) {
DEBUG ((DEBUG_ERROR, "FmpDxe: FmpDeviceLib GetImageTypeIdGuidPtr() returned invalid error %r\n", Status));
}
return &gEfiCallerIdGuid;
}
if (FmpDeviceLibGuid == NULL) {
DEBUG ((DEBUG_ERROR, "FmpDxe: FmpDeviceLib GetImageTypeIdGuidPtr() returned invalid GUID\n"));
return &gEfiCallerIdGuid;
}
return FmpDeviceLibGuid;
}
/**
Returns a pointer to the Null-terminated Unicode ImageIdName string.
@return Null-terminated Unicode ImageIdName string.
**/
CHAR16 *
GetImageTypeNameString (
VOID
)
{
return mImageIdName;
}
/**
Lowest supported version is a combo of three parts.
1. Check if the device lib has a lowest supported version
2. Check if we have a variable for lowest supported version (this will be updated with each capsule applied)
3. Check Fixed at build PCD
Take the largest value
**/
UINT32
GetLowestSupportedVersion (
VOID
)
{
EFI_STATUS Status;
UINT32 DeviceLibLowestSupportedVersion;
UINT32 VariableLowestSupportedVersion;
UINT32 ReturnLsv;
//
// Get the LowestSupportedVersion.
//
if (!IsLowestSupportedVersionCheckRequired ()) {
//
// Any Version can pass the 0 LowestSupportedVersion check.
//
return 0;
}
ReturnLsv = PcdGet32 (PcdFmpDeviceBuildTimeLowestSupportedVersion);
//
// Check the FmpDeviceLib
//
DeviceLibLowestSupportedVersion = DEFAULT_LOWESTSUPPORTEDVERSION;
Status = FmpDeviceGetLowestSupportedVersion (&DeviceLibLowestSupportedVersion);
if (EFI_ERROR (Status)) {
DeviceLibLowestSupportedVersion = DEFAULT_LOWESTSUPPORTEDVERSION;
}
if (DeviceLibLowestSupportedVersion > ReturnLsv) {
ReturnLsv = DeviceLibLowestSupportedVersion;
}
//
// Check the lowest supported version UEFI variable for this device
//
VariableLowestSupportedVersion = GetLowestSupportedVersionFromVariable();
if (VariableLowestSupportedVersion > ReturnLsv) {
ReturnLsv = VariableLowestSupportedVersion;
}
//
// Return the largest value
//
return ReturnLsv;
}
/**
Populates the EFI_FIRMWARE_IMAGE_DESCRIPTOR structure in the module global
variable mDesc.
**/
VOID
PopulateDescriptor (
VOID
)
{
EFI_STATUS Status;
mDesc.ImageIndex = 1;
CopyGuid (&mDesc.ImageTypeId, GetImageTypeIdGuid());
mDesc.ImageId = mImageId;
mDesc.ImageIdName = GetImageTypeNameString();
//
// Get the version. Some devices don't support getting the firmware version
// at runtime. If FmpDeviceLib does not support returning a version, then
// it is stored in a UEFI variable.
//
Status = FmpDeviceGetVersion (&mDesc.Version);
if (Status == EFI_UNSUPPORTED) {
mRuntimeVersionSupported = FALSE;
mDesc.Version = GetVersionFromVariable();
} else if (EFI_ERROR (Status)) {
//
// Unexpected error. Use default version.
//
DEBUG ((DEBUG_ERROR, "FmpDxe: GetVersion() from FmpDeviceLib (%s) returned %r\n", GetImageTypeNameString(), Status));
mDesc.Version = DEFAULT_VERSION;
}
//
// Free the current version name. Shouldn't really happen but this populate
// function could be called multiple times (to refresh).
//
if (mVersionName != NULL) {
FreePool (mVersionName);
mVersionName = NULL;
}
//
// Attempt to get the version string from the FmpDeviceLib
//
Status = FmpDeviceGetVersionString (&mVersionName);
if (Status == EFI_UNSUPPORTED) {
DEBUG ((DEBUG_INFO, "FmpDxe: GetVersionString() unsupported in FmpDeviceLib.\n"));
mVersionName = AllocateCopyPool (
sizeof (VERSION_STRING_NOT_SUPPORTED),
VERSION_STRING_NOT_SUPPORTED
);
} else if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_INFO, "FmpDxe: GetVersionString() not available in FmpDeviceLib.\n"));
mVersionName = AllocateCopyPool (
sizeof (VERSION_STRING_NOT_AVAILABLE),
VERSION_STRING_NOT_AVAILABLE
);
}
mDesc.VersionName = mVersionName;
mDesc.LowestSupportedImageVersion = GetLowestSupportedVersion();
//
// Get attributes from the FmpDeviceLib
//
FmpDeviceGetAttributes (&mDesc.AttributesSupported, &mDesc.AttributesSetting);
//
// Force set the updatable bits in the attributes;
//
mDesc.AttributesSupported |= IMAGE_ATTRIBUTE_IMAGE_UPDATABLE;
mDesc.AttributesSetting |= IMAGE_ATTRIBUTE_IMAGE_UPDATABLE;
//
// Force set the authentication bits in the attributes;
//
mDesc.AttributesSupported |= (IMAGE_ATTRIBUTE_AUTHENTICATION_REQUIRED);
mDesc.AttributesSetting |= (IMAGE_ATTRIBUTE_AUTHENTICATION_REQUIRED);
mDesc.Compatibilities = 0;
//
// Get the size of the firmware image from the FmpDeviceLib
//
Status = FmpDeviceGetSize (&mDesc.Size);
if (EFI_ERROR (Status)) {
mDesc.Size = 0;
}
mDesc.LastAttemptVersion = GetLastAttemptVersionFromVariable ();
mDesc.LastAttemptStatus = GetLastAttemptStatusFromVariable ();
mDescriptorPopulated = TRUE;
}
/**
Returns information about the current firmware image(s) of the device.
This function allows a copy of the current firmware image to be created and saved.
The saved copy could later been used, for example, in firmware image recovery or rollback.
@param[in] This A pointer to the EFI_FIRMWARE_MANAGEMENT_PROTOCOL instance.
@param[in, out] ImageInfoSize A pointer to the size, in bytes, of the ImageInfo buffer.
On input, this is the size of the buffer allocated by the caller.
On output, it is the size of the buffer returned by the firmware
if the buffer was large enough, or the size of the buffer needed
to contain the image(s) information if the buffer was too small.
@param[in, out] ImageInfo A pointer to the buffer in which firmware places the current image(s)
information. The information is an array of EFI_FIRMWARE_IMAGE_DESCRIPTORs.
@param[out] DescriptorVersion A pointer to the location in which firmware returns the version number
associated with the EFI_FIRMWARE_IMAGE_DESCRIPTOR.
@param[out] DescriptorCount A pointer to the location in which firmware returns the number of
descriptors or firmware images within this device.
@param[out] DescriptorSize A pointer to the location in which firmware returns the size, in bytes,
of an individual EFI_FIRMWARE_IMAGE_DESCRIPTOR.
@param[out] PackageVersion A version number that represents all the firmware images in the device.
The format is vendor specific and new version must have a greater value
than the old version. If PackageVersion is not supported, the value is
0xFFFFFFFF. A value of 0xFFFFFFFE indicates that package version comparison
is to be performed using PackageVersionName. A value of 0xFFFFFFFD indicates
that package version update is in progress.
@param[out] PackageVersionName A pointer to a pointer to a null-terminated string representing the
package version name. The buffer is allocated by this function with
AllocatePool(), and it is the caller's responsibility to free it with a call
to FreePool().
@retval EFI_SUCCESS The device was successfully updated with the new image.
@retval EFI_BUFFER_TOO_SMALL The ImageInfo buffer was too small. The current buffer size
needed to hold the image(s) information is returned in ImageInfoSize.
@retval EFI_INVALID_PARAMETER ImageInfoSize is NULL.
@retval EFI_DEVICE_ERROR Valid information could not be returned. Possible corrupted image.
**/
EFI_STATUS
EFIAPI
GetTheImageInfo (
IN EFI_FIRMWARE_MANAGEMENT_PROTOCOL *This,
IN OUT UINTN *ImageInfoSize,
IN OUT EFI_FIRMWARE_IMAGE_DESCRIPTOR *ImageInfo,
OUT UINT32 *DescriptorVersion,
OUT UINT8 *DescriptorCount,
OUT UINTN *DescriptorSize,
OUT UINT32 *PackageVersion,
OUT CHAR16 **PackageVersionName
)
{
EFI_STATUS Status;
Status = EFI_SUCCESS;
//
// Check for valid pointer
//
if (ImageInfoSize == NULL) {
DEBUG ((DEBUG_ERROR, "FmpDxe: GetImageInfo() - ImageInfoSize is NULL.\n"));
Status = EFI_INVALID_PARAMETER;
goto cleanup;
}
//
// Check the buffer size
// NOTE: Check this first so caller can get the necessary memory size it must allocate.
//
if (*ImageInfoSize < (sizeof (EFI_FIRMWARE_IMAGE_DESCRIPTOR))) {
*ImageInfoSize = sizeof (EFI_FIRMWARE_IMAGE_DESCRIPTOR);
DEBUG ((DEBUG_VERBOSE, "FmpDxe: GetImageInfo() - ImageInfoSize is to small.\n"));
Status = EFI_BUFFER_TOO_SMALL;
goto cleanup;
}
//
// Confirm that buffer isn't null
//
if ( (ImageInfo == NULL) || (DescriptorVersion == NULL) || (DescriptorCount == NULL) || (DescriptorSize == NULL)
|| (PackageVersion == NULL)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: GetImageInfo() - Pointer Parameter is NULL.\n"));
Status = EFI_INVALID_PARAMETER;
goto cleanup;
}
//
// Set the size to whatever we need
//
*ImageInfoSize = sizeof (EFI_FIRMWARE_IMAGE_DESCRIPTOR);
if (!mDescriptorPopulated) {
PopulateDescriptor();
}
//
// Copy the image descriptor
//
CopyMem (ImageInfo, &mDesc, sizeof (EFI_FIRMWARE_IMAGE_DESCRIPTOR));
*DescriptorVersion = EFI_FIRMWARE_IMAGE_DESCRIPTOR_VERSION;
*DescriptorCount = 1;
*DescriptorSize = sizeof (EFI_FIRMWARE_IMAGE_DESCRIPTOR);
//
// means unsupported
//
*PackageVersion = 0xFFFFFFFF;
//
// Do not update PackageVersionName since it is not supported in this instance.
//
cleanup:
return Status;
}
/**
Retrieves a copy of the current firmware image of the device.
This function allows a copy of the current firmware image to be created and saved.
The saved copy could later been used, for example, in firmware image recovery or rollback.
@param[in] This A pointer to the EFI_FIRMWARE_MANAGEMENT_PROTOCOL instance.
@param[in] ImageIndex A unique number identifying the firmware image(s) within the device.
The number is between 1 and DescriptorCount.
@param[in, out] Image Points to the buffer where the current image is copied to.
@param[in, out] ImageSize On entry, points to the size of the buffer pointed to by Image, in bytes.
On return, points to the length of the image, in bytes.
@retval EFI_SUCCESS The device was successfully updated with the new image.
@retval EFI_BUFFER_TOO_SMALL The buffer specified by ImageSize is too small to hold the
image. The current buffer size needed to hold the image is returned
in ImageSize.
@retval EFI_INVALID_PARAMETER The Image was NULL.
@retval EFI_NOT_FOUND The current image is not copied to the buffer.
@retval EFI_UNSUPPORTED The operation is not supported.
@retval EFI_SECURITY_VIOLATION The operation could not be performed due to an authentication failure.
**/
EFI_STATUS
EFIAPI
GetTheImage (
IN EFI_FIRMWARE_MANAGEMENT_PROTOCOL *This,
IN UINT8 ImageIndex,
IN OUT VOID *Image,
IN OUT UINTN *ImageSize
)
{
EFI_STATUS Status;
UINTN Size;
Status = EFI_SUCCESS;
//
// Check to make sure index is 1 (only 1 image for this device)
//
if (ImageIndex != 1) {
DEBUG ((DEBUG_ERROR, "FmpDxe: GetImage() - Image Index Invalid.\n"));
Status = EFI_INVALID_PARAMETER;
goto cleanup;
}
if (ImageSize == NULL) {
DEBUG ((DEBUG_ERROR, "FmpDxe: GetImage() - ImageSize Pointer Parameter is NULL.\n"));
Status = EFI_INVALID_PARAMETER;
goto cleanup;
}
//
// Check the buffer size
//
Status = FmpDeviceGetSize (&Size);
if (EFI_ERROR (Status)) {
Size = 0;
}
if (*ImageSize < Size) {
*ImageSize = Size;
DEBUG ((DEBUG_VERBOSE, "FmpDxe: GetImage() - ImageSize is to small.\n"));
Status = EFI_BUFFER_TOO_SMALL;
goto cleanup;
}
if (Image == NULL) {
DEBUG ((DEBUG_ERROR, "FmpDxe: GetImage() - Image Pointer Parameter is NULL.\n"));
Status = EFI_INVALID_PARAMETER;
goto cleanup;
}
Status = FmpDeviceGetImage (Image, ImageSize);
cleanup:
return Status;
}
/**
Helper function to safely retrieve the FMP header from
within an EFI_FIRMWARE_IMAGE_AUTHENTICATION structure.
@param[in] Image Pointer to the image.
@param[in] ImageSize Size of the image.
@param[out] PayloadSize
@retval !NULL Valid pointer to the header.
@retval NULL Structure is bad and pointer cannot be found.
**/
VOID *
GetFmpHeader (
IN CONST EFI_FIRMWARE_IMAGE_AUTHENTICATION *Image,
IN CONST UINTN ImageSize,
OUT UINTN *PayloadSize
)
{
//
// Check to make sure that operation can be safely performed.
//
if (((UINTN)Image + sizeof (Image->MonotonicCount) + Image->AuthInfo.Hdr.dwLength) < (UINTN)Image || \
((UINTN)Image + sizeof (Image->MonotonicCount) + Image->AuthInfo.Hdr.dwLength) >= (UINTN)Image + ImageSize) {
//
// Pointer overflow. Invalid image.
//
return NULL;
}
*PayloadSize = ImageSize - (sizeof (Image->MonotonicCount) + Image->AuthInfo.Hdr.dwLength);
return (VOID *)((UINT8 *)Image + sizeof (Image->MonotonicCount) + Image->AuthInfo.Hdr.dwLength);
}
/**
Helper function to safely calculate the size of all headers
within an EFI_FIRMWARE_IMAGE_AUTHENTICATION structure.
@param[in] Image Pointer to the image.
@param[in] AdditionalHeaderSize Size of any headers that cannot be calculated by this function.
@retval UINT32>0 Valid size of all the headers.
@retval 0 Structure is bad and size cannot be found.
**/
UINT32
GetAllHeaderSize (
IN CONST EFI_FIRMWARE_IMAGE_AUTHENTICATION *Image,
IN UINT32 AdditionalHeaderSize
)
{
UINT32 CalculatedSize;
CalculatedSize = sizeof (Image->MonotonicCount) +
AdditionalHeaderSize +
Image->AuthInfo.Hdr.dwLength;
//
// Check to make sure that operation can be safely performed.
//
if (CalculatedSize < sizeof (Image->MonotonicCount) ||
CalculatedSize < AdditionalHeaderSize ||
CalculatedSize < Image->AuthInfo.Hdr.dwLength ) {
//
// Integer overflow. Invalid image.
//
return 0;
}
return CalculatedSize;
}
/**
Checks if the firmware image is valid for the device.
This function allows firmware update application to validate the firmware image without
invoking the SetImage() first.
@param[in] This A pointer to the EFI_FIRMWARE_MANAGEMENT_PROTOCOL instance.
@param[in] ImageIndex A unique number identifying the firmware image(s) within the device.
The number is between 1 and DescriptorCount.
@param[in] Image Points to the new image.
@param[in] ImageSize Size of the new image in bytes.
@param[out] ImageUpdatable Indicates if the new image is valid for update. It also provides,
if available, additional information if the image is invalid.
@retval EFI_SUCCESS The image was successfully checked.
@retval EFI_ABORTED The operation is aborted.
@retval EFI_INVALID_PARAMETER The Image was NULL.
@retval EFI_UNSUPPORTED The operation is not supported.
@retval EFI_SECURITY_VIOLATION The operation could not be performed due to an authentication failure.
**/
EFI_STATUS
EFIAPI
CheckTheImage (
IN EFI_FIRMWARE_MANAGEMENT_PROTOCOL *This,
IN UINT8 ImageIndex,
IN CONST VOID *Image,
IN UINTN ImageSize,
OUT UINT32 *ImageUpdatable
)
{
EFI_STATUS Status;
UINTN RawSize;
VOID *FmpPayloadHeader;
UINTN FmpPayloadSize;
UINT32 Version;
UINT32 FmpHeaderSize;
UINTN AllHeaderSize;
UINT32 Index;
VOID *PublicKeyData;
UINTN PublicKeyDataLength;
UINT8 *PublicKeyDataXdr;
UINT8 *PublicKeyDataXdrEnd;
Status = EFI_SUCCESS;
RawSize = 0;
FmpPayloadHeader = NULL;
FmpPayloadSize = 0;
Version = 0;
FmpHeaderSize = 0;
AllHeaderSize = 0;
//
// make sure the descriptor has already been loaded
//
if (!mDescriptorPopulated) {
PopulateDescriptor();
}
if (ImageUpdatable == NULL) {
DEBUG ((DEBUG_ERROR, "FmpDxe: CheckImage() - ImageUpdatable Pointer Parameter is NULL.\n"));
Status = EFI_INVALID_PARAMETER;
goto cleanup;
}
//
//Set to valid and then if any tests fail it will update this flag.
//
*ImageUpdatable = IMAGE_UPDATABLE_VALID;
if (Image == NULL) {
DEBUG ((DEBUG_ERROR, "FmpDxe: CheckImage() - Image Pointer Parameter is NULL.\n"));
//
// not sure if this is needed
//
*ImageUpdatable = IMAGE_UPDATABLE_INVALID;
return EFI_INVALID_PARAMETER;
}
PublicKeyDataXdr = PcdGetPtr (PcdFmpDevicePkcs7CertBufferXdr);
PublicKeyDataXdrEnd = PublicKeyDataXdr + PcdGetSize (PcdFmpDevicePkcs7CertBufferXdr);
if (PublicKeyDataXdr == NULL || (PublicKeyDataXdr == PublicKeyDataXdrEnd)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: Invalid certificate, skipping it.\n"));
Status = EFI_ABORTED;
} else {
//
// Try each key from PcdFmpDevicePkcs7CertBufferXdr
//
for (Index = 1; PublicKeyDataXdr < PublicKeyDataXdrEnd; Index++) {
Index++;
DEBUG (
(DEBUG_INFO,
"FmpDxe: Certificate #%d [%p..%p].\n",
Index,
PublicKeyDataXdr,
PublicKeyDataXdrEnd
)
);
if ((PublicKeyDataXdr + sizeof (UINT32)) > PublicKeyDataXdrEnd) {
//
// Key data extends beyond end of PCD
//
DEBUG ((DEBUG_ERROR, "FmpDxe: Certificate size extends beyond end of PCD, skipping it.\n"));
Status = EFI_ABORTED;
break;
}
//
// Read key length stored in big-endian format
//
PublicKeyDataLength = SwapBytes32 (*(UINT32 *)(PublicKeyDataXdr));
//
// Point to the start of the key data
//
PublicKeyDataXdr += sizeof (UINT32);
if (PublicKeyDataXdr + PublicKeyDataLength > PublicKeyDataXdrEnd) {
//
// Key data extends beyond end of PCD
//
DEBUG ((DEBUG_ERROR, "FmpDxe: Certificate extends beyond end of PCD, skipping it.\n"));
Status = EFI_ABORTED;
break;
}
PublicKeyData = PublicKeyDataXdr;
Status = AuthenticateFmpImage (
(EFI_FIRMWARE_IMAGE_AUTHENTICATION *)Image,
ImageSize,
PublicKeyData,
PublicKeyDataLength
);
if (!EFI_ERROR (Status)) {
break;
}
PublicKeyDataXdr += PublicKeyDataLength;
PublicKeyDataXdr = (UINT8 *)ALIGN_POINTER (PublicKeyDataXdr, sizeof (UINT32));
}
}
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: CheckTheImage() - Authentication Failed %r.\n", Status));
goto cleanup;
}
//
// Check to make sure index is 1
//
if (ImageIndex != 1) {
DEBUG ((DEBUG_ERROR, "FmpDxe: CheckImage() - Image Index Invalid.\n"));
*ImageUpdatable = IMAGE_UPDATABLE_INVALID_TYPE;
Status = EFI_SUCCESS;
goto cleanup;
}
//
// Check the FmpPayloadHeader
//
FmpPayloadHeader = GetFmpHeader ( (EFI_FIRMWARE_IMAGE_AUTHENTICATION *)Image, ImageSize, &FmpPayloadSize );
if (FmpPayloadHeader == NULL) {
DEBUG ((DEBUG_ERROR, "FmpDxe: CheckTheImage() - GetFmpHeader failed.\n"));
Status = EFI_ABORTED;
goto cleanup;
}
Status = GetFmpPayloadHeaderVersion (FmpPayloadHeader, FmpPayloadSize, &Version);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: CheckTheImage() - GetFmpPayloadHeaderVersion failed %r.\n", Status));
*ImageUpdatable = IMAGE_UPDATABLE_INVALID;
Status = EFI_SUCCESS;
goto cleanup;
}
//
// Check the lowest supported version
//
if (Version < mDesc.LowestSupportedImageVersion) {
DEBUG (
(DEBUG_ERROR,
"FmpDxe: CheckTheImage() - Version Lower than lowest supported version. 0x%08X < 0x%08X\n",
Version, mDesc.LowestSupportedImageVersion)
);
*ImageUpdatable = IMAGE_UPDATABLE_INVALID_OLD;
Status = EFI_SUCCESS;
goto cleanup;
}
//
// Get the FmpHeaderSize so we can determine the real payload size
//
Status = GetFmpPayloadHeaderSize (FmpPayloadHeader, FmpPayloadSize, &FmpHeaderSize);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: CheckTheImage() - GetFmpPayloadHeaderSize failed %r.\n", Status));
*ImageUpdatable = IMAGE_UPDATABLE_INVALID;
Status = EFI_SUCCESS;
goto cleanup;
}
//
// Call FmpDevice Lib Check Image on the
// Raw payload. So all headers need stripped off
//
AllHeaderSize = GetAllHeaderSize ( (EFI_FIRMWARE_IMAGE_AUTHENTICATION *)Image, FmpHeaderSize );
if (AllHeaderSize == 0) {
DEBUG ((DEBUG_ERROR, "FmpDxe: CheckTheImage() - GetAllHeaderSize failed.\n"));
Status = EFI_ABORTED;
goto cleanup;
}
RawSize = ImageSize - AllHeaderSize;
//
// FmpDeviceLib CheckImage function to do any specific checks
//
Status = FmpDeviceCheckImage ((((UINT8 *)Image) + AllHeaderSize), RawSize, ImageUpdatable);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: CheckTheImage() - FmpDeviceLib CheckImage failed. Status = %r\n", Status));
}
cleanup:
return Status;
}
/**
Updates the firmware image of the device.
This function updates the hardware with the new firmware image.
This function returns EFI_UNSUPPORTED if the firmware image is not updatable.
If the firmware image is updatable, the function should perform the following minimal validations
before proceeding to do the firmware image update.
- Validate the image authentication if image has attribute
IMAGE_ATTRIBUTE_AUTHENTICATION_REQUIRED. The function returns
EFI_SECURITY_VIOLATION if the validation fails.
- Validate the image is a supported image for this device. The function returns EFI_ABORTED if
the image is unsupported. The function can optionally provide more detailed information on
why the image is not a supported image.
- Validate the data from VendorCode if not null. Image validation must be performed before
VendorCode data validation. VendorCode data is ignored or considered invalid if image
validation failed. The function returns EFI_ABORTED if the data is invalid.
VendorCode enables vendor to implement vendor-specific firmware image update policy. Null if
the caller did not specify the policy or use the default policy. As an example, vendor can implement
a policy to allow an option to force a firmware image update when the abort reason is due to the new
firmware image version is older than the current firmware image version or bad image checksum.
Sensitive operations such as those wiping the entire firmware image and render the device to be
non-functional should be encoded in the image itself rather than passed with the VendorCode.
AbortReason enables vendor to have the option to provide a more detailed description of the abort
reason to the caller.
@param[in] This A pointer to the EFI_FIRMWARE_MANAGEMENT_PROTOCOL instance.
@param[in] ImageIndex A unique number identifying the firmware image(s) within the device.
The number is between 1 and DescriptorCount.
@param[in] Image Points to the new image.
@param[in] ImageSize Size of the new image in bytes.
@param[in] VendorCode This enables vendor to implement vendor-specific firmware image update policy.
Null indicates the caller did not specify the policy or use the default policy.
@param[in] Progress A function used by the driver to report the progress of the firmware update.
@param[out] AbortReason A pointer to a pointer to a null-terminated string providing more
details for the aborted operation. The buffer is allocated by this function
with AllocatePool(), and it is the caller's responsibility to free it with a
call to FreePool().
@retval EFI_SUCCESS The device was successfully updated with the new image.
@retval EFI_ABORTED The operation is aborted.
@retval EFI_INVALID_PARAMETER The Image was NULL.
@retval EFI_UNSUPPORTED The operation is not supported.
@retval EFI_SECURITY_VIOLATION The operation could not be performed due to an authentication failure.
**/
EFI_STATUS
EFIAPI
SetTheImage (
IN EFI_FIRMWARE_MANAGEMENT_PROTOCOL *This,
IN UINT8 ImageIndex,
IN CONST VOID *Image,
IN UINTN ImageSize,
IN CONST VOID *VendorCode,
IN EFI_FIRMWARE_MANAGEMENT_UPDATE_IMAGE_PROGRESS Progress,
OUT CHAR16 **AbortReason
)
{
EFI_STATUS Status;
UINT32 Updateable;
BOOLEAN BooleanValue;
UINT32 FmpHeaderSize;
VOID *FmpHeader;
UINTN FmpPayloadSize;
UINT32 AllHeaderSize;
UINT32 IncommingFwVersion;
UINT32 LastAttemptStatus;
UINT32 Version;
UINT32 LowestSupportedVersion;
Status = EFI_SUCCESS;
Updateable = 0;
BooleanValue = FALSE;
FmpHeaderSize = 0;
FmpHeader = NULL;
FmpPayloadSize = 0;
AllHeaderSize = 0;
IncommingFwVersion = 0;
LastAttemptStatus = LAST_ATTEMPT_STATUS_ERROR_UNSUCCESSFUL;
SetLastAttemptVersionInVariable (IncommingFwVersion); //set to 0 to clear any previous results.
//
// if we have locked the device, then skip the set operation.
// it should be blocked by hardware too but we can catch here even faster
//
if (mFmpDeviceLocked) {
DEBUG ((DEBUG_ERROR, "FmpDxe: SetTheImage() - Device is already locked. Can't update.\n"));
Status = EFI_UNSUPPORTED;
goto cleanup;
}
//
// Call check image to verify the image
//
Status = CheckTheImage (This, ImageIndex, Image, ImageSize, &Updateable);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: SetTheImage() - Check The Image failed with %r.\n", Status));
if (Status == EFI_SECURITY_VIOLATION) {
LastAttemptStatus = LAST_ATTEMPT_STATUS_ERROR_AUTH_ERROR;
}
goto cleanup;
}
//
// No functional error in CheckTheImage. Attempt to get the Version to
// support better error reporting.
//
FmpHeader = GetFmpHeader ( (EFI_FIRMWARE_IMAGE_AUTHENTICATION *)Image, ImageSize, &FmpPayloadSize );
if (FmpHeader == NULL) {
DEBUG ((DEBUG_ERROR, "FmpDxe: SetTheImage() - GetFmpHeader failed.\n"));
Status = EFI_ABORTED;
goto cleanup;
}
Status = GetFmpPayloadHeaderVersion (FmpHeader, FmpPayloadSize, &IncommingFwVersion);
if (!EFI_ERROR (Status)) {
//
// Set to actual value
//
SetLastAttemptVersionInVariable (IncommingFwVersion);
}
if (Updateable != IMAGE_UPDATABLE_VALID) {
DEBUG (
(DEBUG_ERROR,
"FmpDxed: SetTheImage() - Check The Image returned that the Image was not valid for update. Updatable value = 0x%X.\n",
Updateable)
);
Status = EFI_ABORTED;
goto cleanup;
}
if (Progress == NULL) {
DEBUG ((DEBUG_ERROR, "FmpDxe: SetTheImage() - Invalid progress callback\n"));
Status = EFI_INVALID_PARAMETER;
goto cleanup;
}
mProgressFunc = Progress;
mProgressSupported = TRUE;
//
// Checking the image is at least 1%
//
Status = Progress (1);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: SetTheImage() - Progress Callback failed with Status %r.\n", Status));
}
//
//Check System Power
//
Status = CheckSystemPower (&BooleanValue);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: SetTheImage() - CheckSystemPower - API call failed %r.\n", Status));
goto cleanup;
}
if (!BooleanValue) {
Status = EFI_ABORTED;
DEBUG (
(DEBUG_ERROR,
"FmpDxe: SetTheImage() - CheckSystemPower - returned False. Update not allowed due to System Power.\n")
);
LastAttemptStatus = LAST_ATTEMPT_STATUS_ERROR_PWR_EVT_BATT;
goto cleanup;
}
Progress (2);
//
//Check System Thermal
//
Status = CheckSystemThermal (&BooleanValue);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: SetTheImage() - CheckSystemThermal - API call failed %r.\n", Status));
goto cleanup;
}
if (!BooleanValue) {
Status = EFI_ABORTED;
DEBUG (
(DEBUG_ERROR,
"FmpDxe: SetTheImage() - CheckSystemThermal - returned False. Update not allowed due to System Thermal.\n")
);
goto cleanup;
}
Progress (3);
//
//Check System Environment
//
Status = CheckSystemEnvironment (&BooleanValue);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: SetTheImage() - CheckSystemEnvironment - API call failed %r.\n", Status));
goto cleanup;
}
if (!BooleanValue) {
Status = EFI_ABORTED;
DEBUG (
(DEBUG_ERROR,
"FmpDxe: SetTheImage() - CheckSystemEnvironment - returned False. Update not allowed due to System Environment.\n")
);
goto cleanup;
}
Progress (4);
//
// Save LastAttemptStatus as error so that if SetImage never returns the error
// state is recorded.
//
SetLastAttemptStatusInVariable (LastAttemptStatus);
//
// Strip off all the headers so the device can process its firmware
//
Status = GetFmpPayloadHeaderSize (FmpHeader, FmpPayloadSize, &FmpHeaderSize);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: SetTheImage() - GetFmpPayloadHeaderSize failed %r.\n", Status));
goto cleanup;
}
AllHeaderSize = GetAllHeaderSize ( (EFI_FIRMWARE_IMAGE_AUTHENTICATION *)Image, FmpHeaderSize );
if (AllHeaderSize == 0) {
DEBUG ((DEBUG_ERROR, "FmpDxe: SetTheImage() - GetAllHeaderSize failed.\n"));
Status = EFI_ABORTED;
goto cleanup;
}
//
// Indicate that control is handed off to FmpDeviceLib
//
Progress (5);
//
//Copy the requested image to the firmware using the FmpDeviceLib
//
Status = FmpDeviceSetImage (
(((UINT8 *)Image) + AllHeaderSize),
ImageSize - AllHeaderSize,
VendorCode,
FmpDxeProgress,
IncommingFwVersion,
AbortReason
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: SetTheImage() SetImage from FmpDeviceLib failed. Status = %r.\n", Status));
goto cleanup;
}
//
// Finished the update without error
// Indicate that control has been returned from FmpDeviceLib
//
Progress (99);
//
// Update the version stored in variable
//
if (!mRuntimeVersionSupported) {
Version = DEFAULT_VERSION;
GetFmpPayloadHeaderVersion (FmpHeader, FmpPayloadSize, &Version);
SetVersionInVariable (Version);
}
//
// Update lowest supported variable
//
{
LowestSupportedVersion = DEFAULT_LOWESTSUPPORTEDVERSION;
GetFmpPayloadHeaderLowestSupportedVersion (FmpHeader, FmpPayloadSize, &LowestSupportedVersion);
SetLowestSupportedVersionInVariable (LowestSupportedVersion);
}
LastAttemptStatus = LAST_ATTEMPT_STATUS_SUCCESS;
cleanup:
mProgressFunc = NULL;
mProgressSupported = FALSE;
SetLastAttemptStatusInVariable (LastAttemptStatus);
if (Progress != NULL) {
//
// Set progress to 100 after everything is done including recording Status.
//
Progress (100);
}
//
// Need repopulate after SetImage is called to
// update LastAttemptVersion and LastAttemptStatus.
//
mDescriptorPopulated = FALSE;
return Status;
}
/**
Returns information about the firmware package.
This function returns package information.
@param[in] This A pointer to the EFI_FIRMWARE_MANAGEMENT_PROTOCOL instance.
@param[out] PackageVersion A version number that represents all the firmware images in the device.
The format is vendor specific and new version must have a greater value
than the old version. If PackageVersion is not supported, the value is
0xFFFFFFFF. A value of 0xFFFFFFFE indicates that package version
comparison is to be performed using PackageVersionName. A value of
0xFFFFFFFD indicates that package version update is in progress.
@param[out] PackageVersionName A pointer to a pointer to a null-terminated string representing
the package version name. The buffer is allocated by this function with
AllocatePool(), and it is the caller's responsibility to free it with a
call to FreePool().
@param[out] PackageVersionNameMaxLen The maximum length of package version name if device supports update of
package version name. A value of 0 indicates the device does not support
update of package version name. Length is the number of Unicode characters,
including the terminating null character.
@param[out] AttributesSupported Package attributes that are supported by this device. See 'Package Attribute
Definitions' for possible returned values of this parameter. A value of 1
indicates the attribute is supported and the current setting value is
indicated in AttributesSetting. A value of 0 indicates the attribute is not
supported and the current setting value in AttributesSetting is meaningless.
@param[out] AttributesSetting Package attributes. See 'Package Attribute Definitions' for possible returned
values of this parameter
@retval EFI_SUCCESS The package information was successfully returned.
@retval EFI_UNSUPPORTED The operation is not supported.
**/
EFI_STATUS
EFIAPI
GetPackageInfo (
IN EFI_FIRMWARE_MANAGEMENT_PROTOCOL *This,
OUT UINT32 *PackageVersion,
OUT CHAR16 **PackageVersionName,
OUT UINT32 *PackageVersionNameMaxLen,
OUT UINT64 *AttributesSupported,
OUT UINT64 *AttributesSetting
)
{
return EFI_UNSUPPORTED;
}
/**
Updates information about the firmware package.
This function updates package information.
This function returns EFI_UNSUPPORTED if the package information is not updatable.
VendorCode enables vendor to implement vendor-specific package information update policy.
Null if the caller did not specify this policy or use the default policy.
@param[in] This A pointer to the EFI_FIRMWARE_MANAGEMENT_PROTOCOL instance.
@param[in] Image Points to the authentication image.
Null if authentication is not required.
@param[in] ImageSize Size of the authentication image in bytes.
0 if authentication is not required.
@param[in] VendorCode This enables vendor to implement vendor-specific firmware
image update policy.
Null indicates the caller did not specify this policy or use
the default policy.
@param[in] PackageVersion The new package version.
@param[in] PackageVersionName A pointer to the new null-terminated Unicode string representing
the package version name.
The string length is equal to or less than the value returned in
PackageVersionNameMaxLen.
@retval EFI_SUCCESS The device was successfully updated with the new package
information.
@retval EFI_INVALID_PARAMETER The PackageVersionName length is longer than the value
returned in PackageVersionNameMaxLen.
@retval EFI_UNSUPPORTED The operation is not supported.
@retval EFI_SECURITY_VIOLATION The operation could not be performed due to an authentication failure.
**/
EFI_STATUS
EFIAPI
SetPackageInfo (
IN EFI_FIRMWARE_MANAGEMENT_PROTOCOL *This,
IN CONST VOID *Image,
IN UINTN ImageSize,
IN CONST VOID *VendorCode,
IN UINT32 PackageVersion,
IN CONST CHAR16 *PackageVersionName
)
{
return EFI_UNSUPPORTED;
}
/**
Event notification function that is invoked when the event GUID specified by
PcdFmpDeviceLockEventGuid is signaled.
@param[in] Event Event whose notification function is being invoked.
@param[in] Context The pointer to the notification function's context,
which is implementation-dependent.
**/
VOID
EFIAPI
FmpDxeLockEventNotify (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_STATUS Status;
if (!mFmpDeviceLocked) {
//
// Lock the firmware device
//
Status = FmpDeviceLock();
if (EFI_ERROR (Status)) {
if (Status != EFI_UNSUPPORTED) {
DEBUG ((DEBUG_ERROR, "FmpDxe: FmpDeviceLock() returned error. Status = %r\n", Status));
} else {
DEBUG ((DEBUG_WARN, "FmpDxe: FmpDeviceLock() returned error. Status = %r\n", Status));
}
}
mFmpDeviceLocked = TRUE;
}
}
/**
Function to install FMP instance.
@param[in] Handle The device handle to install a FMP instance on.
@retval EFI_SUCCESS FMP Installed
@retval EFI_INVALID_PARAMETER Handle was invalid
@retval other Error installing FMP
**/
EFI_STATUS
EFIAPI
InstallFmpInstance (
IN EFI_HANDLE Handle
)
{
EFI_STATUS Status;
EFI_FIRMWARE_MANAGEMENT_PROTOCOL *Fmp;
EDKII_FIRMWARE_MANAGEMENT_PROGRESS_PROTOCOL *FmpProgress;
Status = EFI_SUCCESS;
Fmp = NULL;
FmpProgress = NULL;
//
// Only allow a single FMP Protocol instance to be installed
//
if (mFmpInstalled) {
return EFI_ALREADY_STARTED;
}
//
// Allocate FMP Protocol instance
//
Fmp = AllocateZeroPool (sizeof (EFI_FIRMWARE_MANAGEMENT_PROTOCOL));
if (Fmp == NULL) {
DEBUG ((DEBUG_ERROR, "FmpDxe: Failed to allocate memory for FMP Protocol instance.\n"));
Status = EFI_OUT_OF_RESOURCES;
goto cleanup;
}
//
// Allocate FMP Progress Protocol instance
//
FmpProgress = AllocateZeroPool (sizeof (EDKII_FIRMWARE_MANAGEMENT_PROGRESS_PROTOCOL));
if (FmpProgress == NULL) {
DEBUG ((DEBUG_ERROR, "FmpDxe: Failed to allocate memory for FMP Progress Protocol instance.\n"));
Status = EFI_OUT_OF_RESOURCES;
FreePool (Fmp);
goto cleanup;
}
//
// Set up FMP Protocol function pointers
//
Fmp->GetImageInfo = GetTheImageInfo;
Fmp->GetImage = GetTheImage;
Fmp->SetImage = SetTheImage;
Fmp->CheckImage = CheckTheImage;
Fmp->GetPackageInfo = GetPackageInfo;
Fmp->SetPackageInfo = SetPackageInfo;
//
// Fill in FMP Progress Protocol fields for Version 1
//
FmpProgress->Version = 1;
FmpProgress->ProgressBarForegroundColor.Raw = PcdGet32 (PcdFmpDeviceProgressColor);
FmpProgress->WatchdogSeconds = PcdGet8 (PcdFmpDeviceProgressWatchdogTimeInSeconds);
//
// Install FMP Protocol and FMP Progress Protocol
//
Status = gBS->InstallMultipleProtocolInterfaces (
&Handle,
&gEfiFirmwareManagementProtocolGuid,
Fmp,
&gEdkiiFirmwareManagementProgressProtocolGuid,
FmpProgress,
NULL
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: FMP Protocol install error. Status = %r.\n", Status));
FreePool (Fmp);
goto cleanup;
}
DEBUG ((DEBUG_INFO, "FmpDxe: FMP Protocol Installed!\n"));
mFmpInstalled = TRUE;
cleanup:
return Status;
}
/**
Main entry for this driver/library.
@param[in] ImageHandle Image handle this driver.
@param[in] SystemTable Pointer to SystemTable.
**/
EFI_STATUS
EFIAPI
FmpDxeEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_GUID *LockGuid;
//
// Verify that a new FILE_GUID value has been provided in the <Defines>
// section of this module. The FILE_GUID is the ESRT GUID that must be
// unique for each updatable firmware image.
//
if (CompareGuid (&mDefaultModuleFileGuid, &gEfiCallerIdGuid)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: Use of default FILE_GUID detected. FILE_GUID must be set to a unique value.\n"));
ASSERT (FALSE);
return EFI_UNSUPPORTED;
}
//
// Get the ImageIdName value for the EFI_FIRMWARE_IMAGE_DESCRIPTOR from a PCD.
//
mImageIdName = (CHAR16 *) PcdGetPtr (PcdFmpDeviceImageIdName);
if (PcdGetSize (PcdFmpDeviceImageIdName) <= 2 || mImageIdName[0] == 0) {
//
// PcdFmpDeviceImageIdName must be set to a non-empty Unicode string
//
DEBUG ((DEBUG_ERROR, "FmpDxe: FmpDeviceLib PcdFmpDeviceImageIdName is an empty string.\n"));
ASSERT (FALSE);
}
//
// Detects if PcdFmpDevicePkcs7CertBufferXdr contains a test key.
//
DetectTestKey ();
if (IsLockFmpDeviceAtLockEventGuidRequired ()) {
//
// Lock all UEFI Variables used by this module.
//
Status = LockAllFmpVariables ();
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: Failed to lock variables. Status = %r.\n", Status));
} else {
DEBUG ((DEBUG_INFO, "FmpDxe: All variables locked\n"));
}
//
// Register notify function to lock the FMP device.
// The lock event GUID is retrieved from PcdFmpDeviceLockEventGuid.
// If PcdFmpDeviceLockEventGuid is not the size of an EFI_GUID, then
// gEfiEndOfDxeEventGroupGuid is used.
//
LockGuid = &gEfiEndOfDxeEventGroupGuid;
if (PcdGetSize (PcdFmpDeviceLockEventGuid) == sizeof (EFI_GUID)) {
LockGuid = (EFI_GUID *)PcdGetPtr (PcdFmpDeviceLockEventGuid);
}
DEBUG ((DEBUG_INFO, "FmpDxe: Lock GUID: %g\n", LockGuid));
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_CALLBACK,
FmpDxeLockEventNotify,
NULL,
LockGuid,
&mFmpDeviceLockEvent
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: Failed to register notification. Status = %r\n", Status));
}
ASSERT_EFI_ERROR (Status);
} else {
DEBUG ((DEBUG_VERBOSE, "FmpDxe: Not registering notification to call FmpDeviceLock() because mfg mode\n"));
}
//
// Register with library the install function so if the library uses
// UEFI driver model/driver binding protocol it can install FMP on its device handle
// If library is simple lib that does not use driver binding then it should return
// unsupported and this will install the FMP instance on the ImageHandle
//
Status = RegisterFmpInstaller (InstallFmpInstance);
if (Status == EFI_UNSUPPORTED) {
DEBUG ((DEBUG_INFO, "FmpDxe: FmpDeviceLib registration returned EFI_UNSUPPORTED. Installing single FMP instance.\n"));
Status = InstallFmpInstance (ImageHandle);
} else if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "FmpDxe: FmpDeviceLib registration returned %r. No FMP installed.\n", Status));
} else {
DEBUG ((
DEBUG_INFO,
"FmpDxe: FmpDeviceLib registration returned EFI_SUCCESS. Expect FMP to be installed during the BDS/Device connection phase.\n"
));
}
return Status;
}
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