SecurityPkg: Cache TPM interface type info

[mirror_edk2.git] / SecurityPkg / Library / Tpm2DeviceLibDTpm / Tpm2InstanceLibDTpm.c

/** @file\r
  This library is TPM2 DTPM instance.\r
  It can be registered to Tpm2 Device router, to be active TPM2 engine,\r
  based on platform setting.\r
\r
Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved. <BR>\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include <Library/BaseLib.h>\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/Tpm2DeviceLib.h>\r
#include <Library/PcdLib.h>\r
\r
#include <Guid/TpmInstance.h>\r
\r
/**\r
  Return PTP interface type.\r
\r
  @param[in] Register                Pointer to PTP register.\r
\r
  @return PTP interface type.\r
**/\r
TPM2_PTP_INTERFACE_TYPE\r
Tpm2GetPtpInterface (\r
  IN VOID *Register\r
  );\r
\r
/**\r
  Dump PTP register information.\r
\r
  @param[in] Register                Pointer to PTP register.\r
**/\r
VOID\r
DumpPtpInfo (\r
  IN VOID *Register\r
  );\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
DTpm2SubmitCommand (\r
  IN UINT32            InputParameterBlockSize,\r
  IN UINT8             *InputParameterBlock,\r
  IN OUT UINT32        *OutputParameterBlockSize,\r
  IN UINT8             *OutputParameterBlock\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
DTpm2RequestUseTpm (\r
  VOID\r
  );\r
\r
TPM2_DEVICE_INTERFACE  mDTpm2InternalTpm2Device = {\r
  TPM_DEVICE_INTERFACE_TPM20_DTPM,\r
  DTpm2SubmitCommand,\r
  DTpm2RequestUseTpm,\r
};\r
\r
/**\r
  The function register DTPM2.0 instance and caches current active TPM interface type.\r
  \r
  @retval EFI_SUCCESS   DTPM2.0 instance is registered, or system dose not surpport registr DTPM2.0 instance\r
**/\r
EFI_STATUS\r
EFIAPI\r
Tpm2InstanceLibDTpmConstructor (\r
  VOID\r
  )\r
{\r
  EFI_STATUS               Status;\r
  TPM2_PTP_INTERFACE_TYPE  PtpInterface;\r
\r
  Status = Tpm2RegisterTpm2DeviceLib (&mDTpm2InternalTpm2Device);\r
  if ((Status == EFI_SUCCESS) || (Status == EFI_UNSUPPORTED)) {\r
    //\r
    // Unsupported means platform policy does not need this instance enabled.\r
    //\r
    if (Status == EFI_SUCCESS) {\r
      //\r
      // Cache current active TpmInterfaceType only when needed\r
      //\r
      if (PcdGet8(PcdActiveTpmInterfaceType) == 0xFF) {\r
        PtpInterface = Tpm2GetPtpInterface ((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));\r
        PcdSet8S(PcdActiveTpmInterfaceType, PtpInterface);\r
      }\r
      DumpPtpInfo ((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));\r
    }\r
    return EFI_SUCCESS;\r
  }\r
  return Status;\r
}\r