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- /** @file
- This library is TPM2 DTPM instance.
- It can be registered to Tpm2 Device router, to be active TPM2 engine,
- based on platform setting.
- 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>
- #include <Guid/TpmInstance.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
- );
- /**
- Dump PTP register information.
- @param[in] Register Pointer to PTP register.
- **/
- VOID
- DumpPtpInfo (
- 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
- );
- TPM2_DEVICE_INTERFACE mDTpm2InternalTpm2Device = {
- TPM_DEVICE_INTERFACE_TPM20_DTPM,
- DTpm2SubmitCommand,
- DTpm2RequestUseTpm,
- };
- /**
- The function register DTPM2.0 instance and 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
- Tpm2InstanceLibDTpmConstructor (
- VOID
- )
- {
- EFI_STATUS Status;
- TPM2_PTP_INTERFACE_TYPE PtpInterface;
- UINT8 IdleByPass;
- Status = Tpm2RegisterTpm2DeviceLib (&mDTpm2InternalTpm2Device);
- if ((Status == EFI_SUCCESS) || (Status == EFI_UNSUPPORTED)) {
- //
- // Unsupported means platform policy does not need this instance enabled.
- //
- if (Status == EFI_SUCCESS) {
- //
- // 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);
- }
- DumpPtpInfo ((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));
- }
- return EFI_SUCCESS;
- }
- return Status;
- }
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