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c1d932429e
signed off by: jiewen.yao@intel.com reviewed by: guo.dong@intel.com git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14687 6f19259b-4bc3-4df7-8a09-765794883524
126 lines
4.0 KiB
C
126 lines
4.0 KiB
C
/** @file
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Ihis library is TPM2 TREE protocol lib.
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Copyright (c) 2013, Intel Corporation. All rights reserved. <BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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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/UefiBootServicesTableLib.h>
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#include <Library/Tpm2DeviceLib.h>
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#include <Protocol/TrEEProtocol.h>
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#include <IndustryStandard/Tpm20.h>
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EFI_TREE_PROTOCOL *mTreeProtocol = NULL;
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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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EFI_STATUS Status;
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TPM2_RESPONSE_HEADER *Header;
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if (mTreeProtocol == NULL) {
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Status = gBS->LocateProtocol (&gEfiTrEEProtocolGuid, NULL, (VOID **) &mTreeProtocol);
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if (EFI_ERROR (Status)) {
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//
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// TrEE protocol is not installed. So, TPM2 is not present.
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//
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DEBUG ((EFI_D_ERROR, "Tpm2SubmitCommand - TrEE - %r\n", Status));
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return EFI_NOT_FOUND;
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}
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}
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//
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// Assume when TrEE Protocol is ready, RequestUseTpm already done.
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//
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Status = mTreeProtocol->SubmitCommand (
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mTreeProtocol,
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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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if (EFI_ERROR (Status)) {
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return Status;
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}
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Header = (TPM2_RESPONSE_HEADER *)OutputParameterBlock;
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*OutputParameterBlockSize = SwapBytes32 (Header->paramSize);
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return EFI_SUCCESS;
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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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EFI_STATUS Status;
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if (mTreeProtocol == NULL) {
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Status = gBS->LocateProtocol (&gEfiTrEEProtocolGuid, NULL, (VOID **) &mTreeProtocol);
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if (EFI_ERROR (Status)) {
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//
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// TrEE protocol is not installed. So, TPM2 is not present.
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//
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DEBUG ((EFI_D_ERROR, "Tpm2RequestUseTpm - TrEE - %r\n", Status));
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return EFI_NOT_FOUND;
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}
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}
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//
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// Assume when TrEE Protocol is ready, RequestUseTpm already done.
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//
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return EFI_SUCCESS;
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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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return EFI_UNSUPPORTED;
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}
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