86 lines
2.8 KiB
C
86 lines
2.8 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, 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 <Guid/TpmInstance.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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**/
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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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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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PpiBasedTpm2RequestUseTpm (
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VOID
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);
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TPM2_DEVICE_INTERFACE mPpiBasedTpm2InternalTpm2Device = {
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TPM_DEVICE_INTERFACE_TPM20_DTPM,
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PpiBasedTpm2SubmitCommand,
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PpiBasedTpm2RequestUseTpm,
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};
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/**
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The function register protocl based TPM2.0 instance.
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@retval EFI_SUCCESS Instance is registered, or system dose not surpport this instance
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**/
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EFI_STATUS
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EFIAPI
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Tpm2InstanceLibPpiBasedConstructor (
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IN EFI_PEI_FILE_HANDLE FileHandle,
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IN CONST EFI_PEI_SERVICES **PeiServices
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)
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{
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EFI_STATUS Status;
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Status = Tpm2RegisterTpm2DeviceLib (&mPpiBasedTpm2InternalTpm2Device);
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if ((Status == EFI_SUCCESS) || (Status == EFI_UNSUPPORTED)) {
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//
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// Unsupported means platform policy does not need this instance enabled.
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//
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return EFI_SUCCESS;
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}
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return Status;
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}
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