UefiCpuPkg: Move AsmRelocateApLoopStart from Mpfuncs.nasm to AmdSev.nasm

[mirror_edk2.git] / SecurityPkg / Library / Tpm2DeviceLibTcg2 / Tpm2DeviceLibTcg2.c

/** @file\r
  This library is TPM2 TCG2 protocol lib.\r
\r
Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved. <BR>\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <Library/BaseLib.h>\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/Tpm2DeviceLib.h>\r
#include <Protocol/Tcg2Protocol.h>\r
#include <IndustryStandard/Tpm20.h>\r
\r
EFI_TCG2_PROTOCOL  *mTcg2Protocol = NULL;\r
\r
/**\r
  This service enables the sending of commands to the TPM2.\r
\r
  @param[in]      InputParameterBlockSize  Size of the TPM2 input parameter block.\r
  @param[in]      InputParameterBlock      Pointer to the TPM2 input parameter block.\r
  @param[in,out]  OutputParameterBlockSize Size of the TPM2 output parameter block.\r
  @param[in]      OutputParameterBlock     Pointer to the TPM2 output parameter block.\r
\r
  @retval EFI_SUCCESS            The command byte stream was successfully sent to the device and a response was successfully received.\r
  @retval EFI_DEVICE_ERROR       The command was not successfully sent to the device or a response was not successfully received from the device.\r
  @retval EFI_BUFFER_TOO_SMALL   The output parameter block is too small.\r
**/\r
EFI_STATUS\r
EFIAPI\r
Tpm2SubmitCommand (\r
  IN UINT32            InputParameterBlockSize,\r
  IN UINT8             *InputParameterBlock,\r
  IN OUT UINT32        *OutputParameterBlockSize,\r
  IN UINT8             *OutputParameterBlock\r
  )\r
{\r
  EFI_STATUS                Status;\r
  TPM2_RESPONSE_HEADER      *Header;\r
\r
  if (mTcg2Protocol == NULL) {\r
    Status = gBS->LocateProtocol (&gEfiTcg2ProtocolGuid, NULL, (VOID **) &mTcg2Protocol);\r
    if (EFI_ERROR (Status)) {\r
      //\r
      // Tcg2 protocol is not installed. So, TPM2 is not present.\r
      //\r
      DEBUG ((EFI_D_ERROR, "Tpm2SubmitCommand - Tcg2 - %r\n", Status));\r
      return EFI_NOT_FOUND;\r
    }\r
  }\r
  //\r
  // Assume when Tcg2 Protocol is ready, RequestUseTpm already done.\r
  //\r
  Status = mTcg2Protocol->SubmitCommand (\r
                            mTcg2Protocol,\r
                            InputParameterBlockSize,\r
                            InputParameterBlock,\r
                            *OutputParameterBlockSize,\r
                            OutputParameterBlock\r
                            );\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
  Header = (TPM2_RESPONSE_HEADER *)OutputParameterBlock;\r
  *OutputParameterBlockSize = SwapBytes32 (Header->paramSize);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  This service requests use TPM2.\r
\r
  @retval EFI_SUCCESS      Get the control of TPM2 chip.\r
  @retval EFI_NOT_FOUND    TPM2 not found.\r
  @retval EFI_DEVICE_ERROR Unexpected device behavior.\r
**/\r
EFI_STATUS\r
EFIAPI\r
Tpm2RequestUseTpm (\r
  VOID\r
  )\r
{\r
  EFI_STATUS   Status;\r
\r
  if (mTcg2Protocol == NULL) {\r
    Status = gBS->LocateProtocol (&gEfiTcg2ProtocolGuid, NULL, (VOID **) &mTcg2Protocol);\r
    if (EFI_ERROR (Status)) {\r
      //\r
      // Tcg2 protocol is not installed. So, TPM2 is not present.\r
      //\r
      DEBUG ((EFI_D_ERROR, "Tpm2RequestUseTpm - Tcg2 - %r\n", Status));\r
      return EFI_NOT_FOUND;\r
    }\r
  }\r
  //\r
  // Assume when Tcg2 Protocol is ready, RequestUseTpm already done.\r
  //\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  This service register TPM2 device.\r
\r
  @param Tpm2Device  TPM2 device\r
\r
  @retval EFI_SUCCESS          This TPM2 device is registered successfully.\r
  @retval EFI_UNSUPPORTED      System does not support register this TPM2 device.\r
  @retval EFI_ALREADY_STARTED  System already register this TPM2 device.\r
**/\r
EFI_STATUS\r
EFIAPI\r
Tpm2RegisterTpm2DeviceLib (\r
  IN TPM2_DEVICE_INTERFACE   *Tpm2Device\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r