289b714b77
https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Jiewen Yao <Jiewen.yao@intel.com> Reviewed-by: Jian J Wang <jian.j.wang@intel.com>
93 lines
3.2 KiB
C
93 lines
3.2 KiB
C
/** @file
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This library is TPM2 device router. Platform can register multi TPM2 instance to it
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via PcdTpmInstanceGuid. Platform need make choice that which one will be final one.
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At most one TPM2 instance can be finally registered, and other will return unsupported.
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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/PcdLib.h>
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#include <Library/Tpm2DeviceLib.h>
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TPM2_DEVICE_INTERFACE mInternalTpm2DeviceInterface;
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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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Tpm2SubmitCommand (
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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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if (mInternalTpm2DeviceInterface.Tpm2SubmitCommand == NULL) {
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return EFI_UNSUPPORTED;
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}
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return mInternalTpm2DeviceInterface.Tpm2SubmitCommand (
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InputParameterBlockSize,
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InputParameterBlock,
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OutputParameterBlockSize,
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OutputParameterBlock
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);
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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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Tpm2RequestUseTpm (
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VOID
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)
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{
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if (mInternalTpm2DeviceInterface.Tpm2RequestUseTpm == NULL) {
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return EFI_UNSUPPORTED;
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}
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return mInternalTpm2DeviceInterface.Tpm2RequestUseTpm ();
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}
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/**
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This service register TPM2 device.
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@param Tpm2Device TPM2 device
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@retval EFI_SUCCESS This TPM2 device is registered successfully.
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@retval EFI_UNSUPPORTED System does not support register this TPM2 device.
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@retval EFI_ALREADY_STARTED System already register this TPM2 device.
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**/
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EFI_STATUS
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EFIAPI
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Tpm2RegisterTpm2DeviceLib (
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IN TPM2_DEVICE_INTERFACE *Tpm2Device
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)
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{
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if (!CompareGuid (PcdGetPtr(PcdTpmInstanceGuid), &Tpm2Device->ProviderGuid)){
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DEBUG ((DEBUG_WARN, "WARNING: Tpm2RegisterTpm2DeviceLib - does not support %g registration\n", &Tpm2Device->ProviderGuid));
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return EFI_UNSUPPORTED;
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}
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CopyMem (&mInternalTpm2DeviceInterface, Tpm2Device, sizeof(mInternalTpm2DeviceInterface));
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return EFI_SUCCESS;
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}
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