SecurityPkg/Library/Tpm12CommandLib/Tpm12PhysicalPresence.c

/** @file
  Implement TPM1.2 Physical Presence related command.

Copyright (c) 2016, Intel Corporation. All rights reserved. <BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include <PiPei.h>
#include <Library/Tpm12CommandLib.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/Tpm12DeviceLib.h>

#pragma pack(1)

typedef struct {
  TPM_RQU_COMMAND_HDR   Hdr;
  TPM_PHYSICAL_PRESENCE PhysicalPresence;
} TPM_CMD_PHYSICAL_PRESENCE;

#pragma pack()

/**
Send TSC_PhysicalPresence command to TPM.

@param[in] PhysicalPresence   The state to set the TPMs Physical Presence flags.

@retval EFI_SUCCESS           Operation completed successfully.
@retval EFI_TIMEOUT           The register can't run into the expected status in time.
@retval EFI_BUFFER_TOO_SMALL  Response data buffer is too small.
@retval EFI_DEVICE_ERROR      Unexpected device behavior.

**/
EFI_STATUS
EFIAPI
Tpm12PhysicalPresence (
  IN TPM_PHYSICAL_PRESENCE  PhysicalPresence
  )
{
  EFI_STATUS                 Status;
  TPM_CMD_PHYSICAL_PRESENCE  Command;
  TPM_RSP_COMMAND_HDR        Response;
  UINT32                     Length;

  //
  // send Tpm command TSC_ORD_PhysicalPresence
  //
  Command.Hdr.tag          = SwapBytes16 (TPM_TAG_RQU_COMMAND);
  Command.Hdr.paramSize    = SwapBytes32 (sizeof (Command));
  Command.Hdr.ordinal      = SwapBytes32 (TSC_ORD_PhysicalPresence);
  Command.PhysicalPresence = SwapBytes16 (PhysicalPresence);
  Length = sizeof (Response);

  Status = Tpm12SubmitCommand (sizeof (Command), (UINT8 *)&Command, &Length, (UINT8 *)&Response);
  if (EFI_ERROR (Status)) {
    return Status;
  }

  if (SwapBytes32(Response.returnCode) != TPM_SUCCESS) {
    DEBUG ((EFI_D_ERROR, "Tpm12PhysicalPresence: Response Code error! 0x%08x\r\n", SwapBytes32(Response.returnCode)));
    return EFI_DEVICE_ERROR;
  }

  return EFI_SUCCESS;
}