mirror of https://github.com/acidanthera/audk.git
133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
/** @file
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This library is TPM2 DTPM instance.
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It can be registered to Tpm2 Device router, to be active TPM2 engine,
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based on platform setting.
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Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved. <BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/Tpm2DeviceLib.h>
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#include <Library/PcdLib.h>
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#include <Guid/TpmInstance.h>
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/**
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Return PTP interface type.
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@param[in] Register Pointer to PTP register.
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@return PTP interface type.
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**/
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TPM2_PTP_INTERFACE_TYPE
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Tpm2GetPtpInterface (
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IN VOID *Register
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);
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/**
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Return PTP CRB interface IdleByPass state.
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@param[in] Register Pointer to PTP register.
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@return PTP CRB interface IdleByPass state.
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**/
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UINT8
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Tpm2GetIdleByPass (
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IN VOID *Register
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);
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/**
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Dump PTP register information.
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@param[in] Register Pointer to PTP register.
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**/
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VOID
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DumpPtpInfo (
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IN VOID *Register
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);
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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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**/
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EFI_STATUS
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EFIAPI
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DTpm2SubmitCommand (
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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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DTpm2RequestUseTpm (
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VOID
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);
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TPM2_DEVICE_INTERFACE mDTpm2InternalTpm2Device = {
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TPM_DEVICE_INTERFACE_TPM20_DTPM,
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DTpm2SubmitCommand,
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DTpm2RequestUseTpm,
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};
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/**
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The function register DTPM2.0 instance and caches current active TPM interface type.
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@retval EFI_SUCCESS DTPM2.0 instance is registered, or system dose not surpport registr DTPM2.0 instance
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**/
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EFI_STATUS
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EFIAPI
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Tpm2InstanceLibDTpmConstructor (
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VOID
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)
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{
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EFI_STATUS Status;
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TPM2_PTP_INTERFACE_TYPE PtpInterface;
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UINT8 IdleByPass;
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Status = Tpm2RegisterTpm2DeviceLib (&mDTpm2InternalTpm2Device);
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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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if (Status == EFI_SUCCESS) {
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//
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// Cache current active TpmInterfaceType only when needed
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//
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if (PcdGet8(PcdActiveTpmInterfaceType) == 0xFF) {
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PtpInterface = Tpm2GetPtpInterface ((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));
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PcdSet8S(PcdActiveTpmInterfaceType, PtpInterface);
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}
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if (PcdGet8(PcdActiveTpmInterfaceType) == Tpm2PtpInterfaceCrb && PcdGet8(PcdCRBIdleByPass) == 0xFF) {
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IdleByPass = Tpm2GetIdleByPass((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));
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PcdSet8S(PcdCRBIdleByPass, IdleByPass);
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}
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DumpPtpInfo ((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));
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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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