/** @file | |
The module entry point for TrEE configuration module. | |
Copyright (c) 2013, Intel Corporation. All rights reserved.<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 | |
http://opensource.org/licenses/bsd-license.php | |
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
**/ | |
#include "TrEEConfigImpl.h" | |
extern TPM_INSTANCE_ID mTpmInstanceId[TPM_DEVICE_MAX + 1]; | |
/** | |
The entry point for TrEE configuration driver. | |
@param[in] ImageHandle The image handle of the driver. | |
@param[in] SystemTable The system table. | |
@retval EFI_ALREADY_STARTED The driver already exists in system. | |
@retval EFI_OUT_OF_RESOURCES Fail to execute entry point due to lack of resources. | |
@retval EFI_SUCCES All the related protocols are installed on the driver. | |
@retval Others Fail to install protocols as indicated. | |
**/ | |
EFI_STATUS | |
EFIAPI | |
TrEEConfigDriverEntryPoint ( | |
IN EFI_HANDLE ImageHandle, | |
IN EFI_SYSTEM_TABLE *SystemTable | |
) | |
{ | |
EFI_STATUS Status; | |
TREE_CONFIG_PRIVATE_DATA *PrivateData; | |
TREE_CONFIGURATION TrEEConfiguration; | |
TREE_DEVICE_DETECTION TrEEDeviceDetection; | |
UINTN Index; | |
UINTN DataSize; | |
EDKII_VARIABLE_LOCK_PROTOCOL *VariableLockProtocol; | |
Status = gBS->OpenProtocol ( | |
ImageHandle, | |
&gEfiCallerIdGuid, | |
NULL, | |
ImageHandle, | |
ImageHandle, | |
EFI_OPEN_PROTOCOL_TEST_PROTOCOL | |
); | |
if (!EFI_ERROR (Status)) { | |
return EFI_ALREADY_STARTED; | |
} | |
// | |
// Create a private data structure. | |
// | |
PrivateData = AllocateCopyPool (sizeof (TREE_CONFIG_PRIVATE_DATA), &mTrEEConfigPrivateDateTemplate); | |
ASSERT (PrivateData != NULL); | |
// | |
// Install private GUID. | |
// | |
Status = gBS->InstallMultipleProtocolInterfaces ( | |
&ImageHandle, | |
&gEfiCallerIdGuid, | |
PrivateData, | |
NULL | |
); | |
ASSERT_EFI_ERROR (Status); | |
DataSize = sizeof(TrEEConfiguration); | |
Status = gRT->GetVariable ( | |
TREE_STORAGE_NAME, | |
&gTrEEConfigFormSetGuid, | |
NULL, | |
&DataSize, | |
&TrEEConfiguration | |
); | |
if (EFI_ERROR (Status)) { | |
// | |
// Variable not ready, set default value | |
// | |
TrEEConfiguration.TpmDevice = TPM_DEVICE_DEFAULT; | |
} | |
// | |
// Validation | |
// | |
if ((TrEEConfiguration.TpmDevice > TPM_DEVICE_MAX) || (TrEEConfiguration.TpmDevice < TPM_DEVICE_MIN)) { | |
TrEEConfiguration.TpmDevice = TPM_DEVICE_DEFAULT; | |
} | |
// | |
// Save to variable so platform driver can get it. | |
// | |
Status = gRT->SetVariable ( | |
TREE_STORAGE_NAME, | |
&gTrEEConfigFormSetGuid, | |
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS, | |
sizeof(TrEEConfiguration), | |
&TrEEConfiguration | |
); | |
if (EFI_ERROR (Status)) { | |
DEBUG ((EFI_D_ERROR, "TrEEConfigDriver: Fail to set TREE_STORAGE_NAME\n")); | |
} | |
// | |
// Sync data from PCD to variable, so that we do not need detect again in S3 phase. | |
// | |
TrEEDeviceDetection.TpmDeviceDetected = TPM_DEVICE_NULL; | |
for (Index = 0; Index < sizeof(mTpmInstanceId)/sizeof(mTpmInstanceId[0]); Index++) { | |
if (CompareGuid (PcdGetPtr(PcdTpmInstanceGuid), &mTpmInstanceId[Index].TpmInstanceGuid)) { | |
TrEEDeviceDetection.TpmDeviceDetected = mTpmInstanceId[Index].TpmDevice; | |
break; | |
} | |
} | |
PrivateData->TpmDeviceDetected = TrEEDeviceDetection.TpmDeviceDetected; | |
// | |
// Save to variable so platform driver can get it. | |
// | |
Status = gRT->SetVariable ( | |
TREE_DEVICE_DETECTION_NAME, | |
&gTrEEConfigFormSetGuid, | |
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS, | |
sizeof(TrEEDeviceDetection), | |
&TrEEDeviceDetection | |
); | |
if (EFI_ERROR (Status)) { | |
DEBUG ((EFI_D_ERROR, "TrEEConfigDriver: Fail to set TREE_DEVICE_DETECTION_NAME\n")); | |
Status = gRT->SetVariable ( | |
TREE_DEVICE_DETECTION_NAME, | |
&gTrEEConfigFormSetGuid, | |
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS, | |
0, | |
NULL | |
); | |
ASSERT_EFI_ERROR (Status); | |
} | |
// | |
// We should lock TrEEDeviceDetection, because it contains information needed at S3. | |
// | |
Status = gBS->LocateProtocol (&gEdkiiVariableLockProtocolGuid, NULL, (VOID **)&VariableLockProtocol); | |
if (!EFI_ERROR (Status)) { | |
Status = VariableLockProtocol->RequestToLock ( | |
VariableLockProtocol, | |
TREE_DEVICE_DETECTION_NAME, | |
&gTrEEConfigFormSetGuid | |
); | |
ASSERT_EFI_ERROR (Status); | |
} | |
// | |
// Install TrEE configuration form | |
// | |
Status = InstallTrEEConfigForm (PrivateData); | |
if (EFI_ERROR (Status)) { | |
goto ErrorExit; | |
} | |
return EFI_SUCCESS; | |
ErrorExit: | |
if (PrivateData != NULL) { | |
UninstallTrEEConfigForm (PrivateData); | |
} | |
return Status; | |
} | |
/** | |
Unload the TrEE configuration form. | |
@param[in] ImageHandle The driver's image handle. | |
@retval EFI_SUCCESS The TrEE configuration form is unloaded. | |
@retval Others Failed to unload the form. | |
**/ | |
EFI_STATUS | |
EFIAPI | |
TrEEConfigDriverUnload ( | |
IN EFI_HANDLE ImageHandle | |
) | |
{ | |
EFI_STATUS Status; | |
TREE_CONFIG_PRIVATE_DATA *PrivateData; | |
Status = gBS->HandleProtocol ( | |
ImageHandle, | |
&gEfiCallerIdGuid, | |
(VOID **) &PrivateData | |
); | |
if (EFI_ERROR (Status)) { | |
return Status; | |
} | |
ASSERT (PrivateData->Signature == TREE_CONFIG_PRIVATE_DATA_SIGNATURE); | |
gBS->UninstallMultipleProtocolInterfaces ( | |
&ImageHandle, | |
&gEfiCallerIdGuid, | |
PrivateData, | |
NULL | |
); | |
UninstallTrEEConfigForm (PrivateData); | |
return EFI_SUCCESS; | |
} |