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/** @file
This library is TPM2 DTPM device lib.
Choosing this library means platform uses and only uses DTPM device as TPM2 engine.
Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved. <BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/Tpm2DeviceLib.h>
#include <Library/PcdLib.h>
/**
Return PTP interface type.
@param[in] Register Pointer to PTP register.
@return PTP interface type.
**/
TPM2_PTP_INTERFACE_TYPE
Tpm2GetPtpInterface (
IN VOID *Register
);
/**
Return PTP CRB interface IdleByPass state.
@param[in] Register Pointer to PTP register.
@return PTP CRB interface IdleByPass state.
**/
UINT8
Tpm2GetIdleByPass (
IN VOID *Register
);
/**
This service enables the sending of commands to the TPM2.
@param[in] InputParameterBlockSize Size of the TPM2 input parameter block.
@param[in] InputParameterBlock Pointer to the TPM2 input parameter block.
@param[in,out] OutputParameterBlockSize Size of the TPM2 output parameter block.
@param[in] OutputParameterBlock Pointer to the TPM2 output parameter block.
@retval EFI_SUCCESS The command byte stream was successfully sent to the device and a response was successfully received.
@retval EFI_DEVICE_ERROR The command was not successfully sent to the device or a response was not successfully received from the device.
@retval EFI_BUFFER_TOO_SMALL The output parameter block is too small.
**/
EFI_STATUS
EFIAPI
DTpm2SubmitCommand (
IN UINT32 InputParameterBlockSize,
IN UINT8 *InputParameterBlock,
IN OUT UINT32 *OutputParameterBlockSize,
IN UINT8 *OutputParameterBlock
);
/**
This service requests use TPM2.
@retval EFI_SUCCESS Get the control of TPM2 chip.
@retval EFI_NOT_FOUND TPM2 not found.
@retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
DTpm2RequestUseTpm (
VOID
);
/**
This service enables the sending of commands to the TPM2.
@param[in] InputParameterBlockSize Size of the TPM2 input parameter block.
@param[in] InputParameterBlock Pointer to the TPM2 input parameter block.
@param[in,out] OutputParameterBlockSize Size of the TPM2 output parameter block.
@param[in] OutputParameterBlock Pointer to the TPM2 output parameter block.
@retval EFI_SUCCESS The command byte stream was successfully sent to the device and a response was successfully received.
@retval EFI_DEVICE_ERROR The command was not successfully sent to the device or a response was not successfully received from the device.
@retval EFI_BUFFER_TOO_SMALL The output parameter block is too small.
**/
EFI_STATUS
EFIAPI
Tpm2SubmitCommand (
IN UINT32 InputParameterBlockSize,
IN UINT8 *InputParameterBlock,
IN OUT UINT32 *OutputParameterBlockSize,
IN UINT8 *OutputParameterBlock
)
{
return DTpm2SubmitCommand (
InputParameterBlockSize,
InputParameterBlock,
OutputParameterBlockSize,
OutputParameterBlock
);
}
/**
This service requests use TPM2.
@retval EFI_SUCCESS Get the control of TPM2 chip.
@retval EFI_NOT_FOUND TPM2 not found.
@retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
Tpm2RequestUseTpm (
VOID
)
{
return DTpm2RequestUseTpm ();
}
/**
This service register TPM2 device.
@param Tpm2Device TPM2 device
@retval EFI_SUCCESS This TPM2 device is registered successfully.
@retval EFI_UNSUPPORTED System does not support register this TPM2 device.
@retval EFI_ALREADY_STARTED System already register this TPM2 device.
**/
EFI_STATUS
EFIAPI
Tpm2RegisterTpm2DeviceLib (
IN TPM2_DEVICE_INTERFACE *Tpm2Device
)
{
return EFI_UNSUPPORTED;
}
/**
The function caches current active TPM interface type.
@retval EFI_SUCCESS DTPM2.0 instance is registered, or system does not support register DTPM2.0 instance
**/
EFI_STATUS
EFIAPI
Tpm2DeviceLibConstructor (
VOID
)
{
TPM2_PTP_INTERFACE_TYPE PtpInterface;
UINT8 IdleByPass;
//
// Cache current active TpmInterfaceType only when needed
//
if (PcdGet8(PcdActiveTpmInterfaceType) == 0xFF) {
PtpInterface = Tpm2GetPtpInterface ((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));
PcdSet8S(PcdActiveTpmInterfaceType, PtpInterface);
}
if (PcdGet8(PcdActiveTpmInterfaceType) == Tpm2PtpInterfaceCrb && PcdGet8(PcdCRBIdleByPass) == 0xFF) {
IdleByPass = Tpm2GetIdleByPass((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));
PcdSet8S(PcdCRBIdleByPass, IdleByPass);
}
return EFI_SUCCESS;
}
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