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/** @file
Tcg PP storage library instance that does support any storage specific PPI.
Copyright (c) 2016, 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 <PiDxe.h>
#include <Guid/TcgPhysicalPresenceStorageData.h>
#include <IndustryStandard/TcgPhysicalPresence.h>
#include <Protocol/SmmVariable.h>
#include <Library/TcgPhysicalPresenceStorageLib.h>
#include <Library/DebugLib.h>
#include <Library/SmmServicesTableLib.h>
EFI_SMM_VARIABLE_PROTOCOL *mTcg2PpStorageSmmVariable;
/**
The handler for TPM physical presence function:
Submit TPM Operation Request to Pre-OS Environment and
Submit TPM Operation Request to Pre-OS Environment 2.
Caution: This function may receive untrusted input.
@param[in] OperationRequest TPM physical presence operation request.
@param[in] RequestParameter TPM physical presence operation request parameter.
@return Return Code for Submit TPM Operation Request to Pre-OS Environment and
Submit TPM Operation Request to Pre-OS Environment 2.
**/
UINT32
EFIAPI
TcgPhysicalPresenceStorageLibSubmitRequestToPreOSFunction (
IN UINT32 OperationRequest,
IN UINT32 RequestParameter
)
{
ASSERT (FALSE);
return TCG_PP_RETURN_TPM_OPERATION_RESPONSE_SUCCESS;
}
/**
The handler for TPM physical presence function:
Return TPM Operation Response to OS Environment.
@param[out] MostRecentRequest Most recent operation request.
@param[out] Response Response to the most recent operation request.
@return Return Code for Return TPM Operation Response to OS Environment.
**/
UINT32
EFIAPI
TcgPhysicalPresenceStorageLibReturnOperationResponseToOsFunction (
OUT UINT32 *MostRecentRequest,
OUT UINT32 *Response
)
{
ASSERT (FALSE);
return TCG_PP_RETURN_TPM_OPERATION_RESPONSE_SUCCESS;
}
/**
Check if the pending TPM request needs user input to confirm.
The TPM request may come from OS. This API will check if TPM request exists and need user
input to confirmation.
@retval TRUE TPM needs input to confirm user physical presence.
@retval FALSE TPM doesn't need input to confirm user physical presence.
**/
BOOLEAN
EFIAPI
TcgPhysicalPresenceStorageLibNeedUserConfirm(
VOID
)
{
ASSERT (FALSE);
return FALSE;
}
/**
Check and execute the pending TPM request.
The TPM request may come from OS or BIOS. This API will display request information and wait
for user confirmation if TPM request exists. The TPM request will be sent to TPM device after
the TPM request is confirmed, and one or more reset may be required to make TPM request to
take effect.
This API should be invoked after console in and console out are all ready as they are required
to display request information and get user input to confirm the request.
@param[in] PlatformAuth platform auth value. NULL means no platform auth change.
**/
VOID
EFIAPI
TcgPhysicalPresenceStorageLibProcessRequest (
VOID
)
{
ASSERT (FALSE);
}
/**
The handler for TPM physical presence function:
Return TPM Operation flag variable.
@return Return Code for Return TPM Operation flag variable.
**/
UINT32
EFIAPI
TcgPhysicalPresenceStorageLibReturnStorageFlags (
VOID
)
{
UINTN DataSize;
EFI_TCG_PHYSICAL_PRESENCE_STORAGE_FLAGS PpiFlags;
EFI_STATUS Status;
//
// Get the Physical Presence storage flags
//
DataSize = sizeof (EFI_TCG_PHYSICAL_PRESENCE_STORAGE_FLAGS);
Status = mTcg2PpStorageSmmVariable->SmmGetVariable (
TCG_PHYSICAL_PRESENCE_STORAGE_FLAGS_VARIABLE,
&gEfiTcgPhysicalPresenceStorageGuid,
NULL,
&DataSize,
&PpiFlags
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "[TPM2] Get PP storage flags failure! Status = %r\n", Status));
PpiFlags.PPFlags = TCG_BIOS_STORAGE_MANAGEMENT_FLAG_DEFAULT;
}
return PpiFlags.PPFlags;
}
/**
Install Boot Manager Menu driver.
@param ImageHandle The image handle.
@param SystemTable The system table.
@retval EFI_SUCEESS Install Boot manager menu success.
@retval Other Return error status.
**/
EFI_STATUS
EFIAPI
TcgPhysicalPresenceStorageLibConstructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Locate SmmVariableProtocol.
//
Status = gSmst->SmmLocateProtocol (&gEfiSmmVariableProtocolGuid, NULL, (VOID**)&mTcg2PpStorageSmmVariable);
ASSERT_EFI_ERROR (Status);
return EFI_SUCCESS;
}
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