SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2DeviceLibDTpm.c File Reference


Functions

EFI_STATUS EFIAPI DTpm2SubmitCommand (IN UINT32 InputParameterBlockSize, IN UINT8 *InputParameterBlock, IN OUT UINT32 *OutputParameterBlockSize, IN UINT8 *OutputParameterBlock)
EFI_STATUS EFIAPI DTpm2RequestUseTpm (VOID)
EFI_STATUS EFIAPI Tpm2SubmitCommand (IN UINT32 InputParameterBlockSize, IN UINT8 *InputParameterBlock, IN OUT UINT32 *OutputParameterBlockSize, IN UINT8 *OutputParameterBlock)
EFI_STATUS EFIAPI Tpm2RequestUseTpm (VOID)
EFI_STATUS EFIAPI Tpm2RegisterTpm2DeviceLib (IN TPM2_DEVICE_INTERFACE *Tpm2Device)

Detailed Description

Ihis library is TPM2 DTPM device lib. Choosing this library means platform uses and only uses DTPM device as TPM2 engine.

Copyright (c) 2013, Intel Corporation. All rights reserved.
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.


Function Documentation

EFI_STATUS EFIAPI DTpm2RequestUseTpm ( VOID   ) 

This service requests use TPM2.

Return values:
EFI_SUCCESS Get the control of TPM2 chip.
EFI_NOT_FOUND TPM2 not found.
EFI_DEVICE_ERROR Unexpected device behavior.

EFI_STATUS EFIAPI DTpm2SubmitCommand ( IN UINT32  InputParameterBlockSize,
IN UINT8 *  InputParameterBlock,
IN OUT UINT32 *  OutputParameterBlockSize,
IN UINT8 *  OutputParameterBlock 
)

This service enables the sending of commands to the TPM2.

Parameters:
[in] InputParameterBlockSize Size of the TPM2 input parameter block.
[in] InputParameterBlock Pointer to the TPM2 input parameter block.
[in,out] OutputParameterBlockSize Size of the TPM2 output parameter block.
[in] OutputParameterBlock Pointer to the TPM2 output parameter block.
Return values:
EFI_SUCCESS The command byte stream was successfully sent to the device and a response was successfully received.
EFI_DEVICE_ERROR The command was not successfully sent to the device or a response was not successfully received from the device.
EFI_BUFFER_TOO_SMALL The output parameter block is too small.

EFI_STATUS EFIAPI Tpm2RegisterTpm2DeviceLib ( IN TPM2_DEVICE_INTERFACE Tpm2Device  ) 

This service register TPM2 device.

Parameters:
Tpm2Device TPM2 device
Return values:
EFI_SUCCESS This TPM2 device is registered successfully.
EFI_UNSUPPORTED System does not support register this TPM2 device.
EFI_ALREADY_STARTED System already register this TPM2 device.

EFI_STATUS EFIAPI Tpm2RequestUseTpm ( VOID   ) 

This service requests use TPM2.

Return values:
EFI_SUCCESS Get the control of TPM2 chip.
EFI_NOT_FOUND TPM2 not found.
EFI_DEVICE_ERROR Unexpected device behavior.

References DTpm2RequestUseTpm().

EFI_STATUS EFIAPI Tpm2SubmitCommand ( IN UINT32  InputParameterBlockSize,
IN UINT8 *  InputParameterBlock,
IN OUT UINT32 *  OutputParameterBlockSize,
IN UINT8 *  OutputParameterBlock 
)

This service enables the sending of commands to the TPM2.

Parameters:
[in] InputParameterBlockSize Size of the TPM2 input parameter block.
[in] InputParameterBlock Pointer to the TPM2 input parameter block.
[in,out] OutputParameterBlockSize Size of the TPM2 output parameter block.
[in] OutputParameterBlock Pointer to the TPM2 output parameter block.
Return values:
EFI_SUCCESS The command byte stream was successfully sent to the device and a response was successfully received.
EFI_DEVICE_ERROR The command was not successfully sent to the device or a response was not successfully received from the device.
EFI_BUFFER_TOO_SMALL The output parameter block is too small.

References DTpm2SubmitCommand().


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