mirror of https://github.com/acidanthera/audk.git
146 lines
4.0 KiB
C
146 lines
4.0 KiB
C
/*++
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Copyright (c) 1999 - 2015, Intel Corporation. All rights reserved
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SPDX-License-Identifier: BSD-2-Clause-Patent
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--*/
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#include <Uefi.h>
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#include <PiPei.h>
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#include <Ppi/PttPassThruPpi.h>
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/IoLib.h>
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#include <Library/DebugLib.h>
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#include <Library/PeiServicesLib.h>
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#include <Library/PcdLib.h>
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PTT_PASS_THRU_PPI *SecPttPassThruPpi = NULL;
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/**
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The constructor function caches the pointer to PEI services.
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The constructor function caches the pointer to PEI services.
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It will always return EFI_SUCCESS.
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@param FfsHeader Pointer to FFS header the loaded driver.
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@param PeiServices Pointer to the PEI services.
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@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
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**/
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EFI_STATUS
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EFIAPI
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Tpm2DeviceLibConstructor (
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VOID
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)
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{
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EFI_STATUS Status = EFI_SUCCESS;
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Status = PeiServicesLocatePpi (&gPttPassThruPpiGuid, 0, NULL, (VOID **) &SecPttPassThruPpi);
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if (EFI_ERROR (Status)) {
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// Locate the PPI failed
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SecPttPassThruPpi = NULL;
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}
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return Status;
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}
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/**
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This service enables the sending of commands to the TPM2.
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@param[in] InputParameterBlockSize Size of the TPM2 input parameter block.
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@param[in] InputParameterBlock Pointer to the TPM2 input parameter block.
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@param[in] OutputParameterBlockSize Size of the TPM2 output parameter block.
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@param[in] OutputParameterBlock Pointer to the TPM2 output parameter block.
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@retval EFI_SUCCESS The command byte stream was successfully sent to the device and a response was successfully received.
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@retval EFI_DEVICE_ERROR The command was not successfully sent to the device or a response was not successfully received from the device.
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@retval EFI_BUFFER_TOO_SMALL The output parameter block is too small.
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**/
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EFI_STATUS
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EFIAPI
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Tpm2SubmitCommand (
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IN UINT32 InputParameterBlockSize,
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IN UINT8 *InputParameterBlock,
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IN OUT UINT32 *OutputParameterBlockSize,
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IN UINT8 *OutputParameterBlock
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)
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{
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EFI_STATUS Status = EFI_SUCCESS;
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if(NULL == InputParameterBlock || NULL == OutputParameterBlock || 0 == InputParameterBlockSize) {
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DEBUG ((EFI_D_ERROR, "Buffer == NULL or InputParameterBlockSize == 0\n"));
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Status = EFI_INVALID_PARAMETER;
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return Status;
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}
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if (NULL == SecPttPassThruPpi) {
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// Don't locate PPI by calling Tpm2DeviceLibConstructor() function??
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Status = EFI_DEVICE_ERROR;
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return Status;
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}
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Status = SecPttPassThruPpi->Tpm2SubmitCommand (
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SecPttPassThruPpi,
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InputParameterBlockSize,
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InputParameterBlock,
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OutputParameterBlockSize,
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OutputParameterBlock
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);
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return Status;
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}
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/**
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This service requests use TPM2.
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@retval EFI_SUCCESS Get the control of TPM2 chip.
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@retval EFI_NOT_FOUND TPM2 not found.
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@retval EFI_DEVICE_ERROR Unexpected device behavior.
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**/
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EFI_STATUS
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EFIAPI
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Tpm2RequestUseTpm (
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VOID
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)
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{
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EFI_STATUS Status = EFI_SUCCESS;
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if (NULL == SecPttPassThruPpi) {
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// Don't locate PPI by calling Tpm2DeviceLibConstructor() function??
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Status = EFI_DEVICE_ERROR;
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return Status;
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}
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Status = SecPttPassThruPpi->Tpm2RequestUseTpm (SecPttPassThruPpi);
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return Status;
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}
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/**
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This service register TPM2 device.
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@Param Tpm2Device TPM2 device
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@retval EFI_SUCCESS This TPM2 device is registered successfully.
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@retval EFI_UNSUPPORTED System does not support register this TPM2 device.
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@retval EFI_ALREADY_STARTED System already register this TPM2 device.
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**/
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EFI_STATUS
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EFIAPI
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Tpm2RegisterTpm2DeviceLib (
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IN PTT_TPM2_DEVICE_INTERFACE *Tpm2Device
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)
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{
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return EFI_UNSUPPORTED;
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}
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