114 lines
4.2 KiB
C
114 lines
4.2 KiB
C
/** @file
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This library abstract how to access TPM2 hardware device.
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;******************************************************************************
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;* Copyright (c) 2014 - 2015, Insyde Software Corp. All Rights Reserved.
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;*
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;* You may not reproduce, distribute, publish, display, perform, modify, adapt,
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;* transmit, broadcast, present, recite, release, license or otherwise exploit
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;* any part of this publication in any form, by any means, without the prior
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;* written permission of Insyde Software Corporation.
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;*
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;******************************************************************************
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*/
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#include <Library/DebugLib.h>
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#include <Library/Tpm2DeviceLib.h>
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#include <Library/PeiServicesTablePointerLib.h>
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#include <Ppi/Tpm2InterfacePei.h>
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#include <IndustryStandard/Tpm20.h>
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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,out] 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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@retval EFI_INVALID_PARAMETER PeiServices not found.
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@retval EFI_UNSUPPORTED PEI_TPM2_INTERFACE_PPI not found.
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**/
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EFI_STATUS
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EFIAPI
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PpiBasedTpm2SubmitCommand (
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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;
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EFI_PEI_PPI_DESCRIPTOR *Tpm2InterfaceDescriptor;
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PEI_TPM2_INTERFACE_PPI *Tpm2Interface;
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EFI_PEI_SERVICES **PeiServices;
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PeiServices = (EFI_PEI_SERVICES **)GetPeiServicesTablePointer ();
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if (PeiServices == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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Status = (**PeiServices).LocatePpi (
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(CONST EFI_PEI_SERVICES **)PeiServices,
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&gPeiTpm2InterfacePpiGuid,
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0,
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&Tpm2InterfaceDescriptor,
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(VOID **)&Tpm2Interface
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "Tpm2Interface Error!\n"));
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return EFI_UNSUPPORTED;
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}
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return Tpm2Interface->SummitCommand (
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PeiServices,
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Tpm2Interface,
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InputParameterBlock,
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InputParameterBlockSize,
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OutputParameterBlock,
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OutputParameterBlockSize
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);
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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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@retval EFI_INVALID_PARAMETER PeiServices not found.
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@retval EFI_UNSUPPORTED PEI_TPM2_INTERFACE_PPI not found.
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**/
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EFI_STATUS
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EFIAPI
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PpiBasedTpm2RequestUseTpm (
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VOID
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)
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{
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EFI_STATUS Status;
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EFI_PEI_PPI_DESCRIPTOR *Tpm2InterfaceDescriptor;
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PEI_TPM2_INTERFACE_PPI *Tpm2Interface;
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EFI_PEI_SERVICES **PeiServices;
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PeiServices = (EFI_PEI_SERVICES **)GetPeiServicesTablePointer ();
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if (PeiServices == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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Status = (**PeiServices).LocatePpi (
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(CONST EFI_PEI_SERVICES **)PeiServices,
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&gPeiTpm2InterfacePpiGuid,
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0,
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&Tpm2InterfaceDescriptor,
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(VOID **)&Tpm2Interface
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "Tpm2Interface Error!\n"));
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return EFI_UNSUPPORTED;
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}
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return Tpm2Interface->RequestUse (PeiServices, Tpm2Interface);
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}
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