SecurityPkg/Library/Tpm12CommandLib/Tpm12PhysicalPresence.c

   1 /** @file
   2   Implement TPM1.2 Physical Presence related command.
   3
   4 Copyright (c) 2016, Intel Corporation. All rights reserved. <BR>
   5 SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 #include <PiPei.h>
  10 #include <Library/Tpm12CommandLib.h>
  11 #include <Library/BaseLib.h>
  12 #include <Library/DebugLib.h>
  13 #include <Library/Tpm12DeviceLib.h>
  14
  15 #pragma pack(1)
  16
  17 typedef struct {
  18   TPM_RQU_COMMAND_HDR   Hdr;
  19   TPM_PHYSICAL_PRESENCE PhysicalPresence;
  20 } TPM_CMD_PHYSICAL_PRESENCE;
  21
  22 #pragma pack()
  23
  24 /**
  25 Send TSC_PhysicalPresence command to TPM.
  26
  27 @param[in] PhysicalPresence   The state to set the TPMs Physical Presence flags.
  28
  29 @retval EFI_SUCCESS           Operation completed successfully.
  30 @retval EFI_TIMEOUT           The register can't run into the expected status in time.
  31 @retval EFI_BUFFER_TOO_SMALL  Response data buffer is too small.
  32 @retval EFI_DEVICE_ERROR      Unexpected device behavior.
  33
  34 **/
  35 EFI_STATUS
  36 EFIAPI
  37 Tpm12PhysicalPresence (
  38   IN TPM_PHYSICAL_PRESENCE  PhysicalPresence
  39   )
  40 {
  41   EFI_STATUS                 Status;
  42   TPM_CMD_PHYSICAL_PRESENCE  Command;
  43   TPM_RSP_COMMAND_HDR        Response;
  44   UINT32                     Length;
  45
  46   //
  47   // send Tpm command TSC_ORD_PhysicalPresence
  48   //
  49   Command.Hdr.tag          = SwapBytes16 (TPM_TAG_RQU_COMMAND);
  50   Command.Hdr.paramSize    = SwapBytes32 (sizeof (Command));
  51   Command.Hdr.ordinal      = SwapBytes32 (TSC_ORD_PhysicalPresence);
  52   Command.PhysicalPresence = SwapBytes16 (PhysicalPresence);
  53   Length = sizeof (Response);
  54
  55   Status = Tpm12SubmitCommand (sizeof (Command), (UINT8 *)&Command, &Length, (UINT8 *)&Response);
  56   if (EFI_ERROR (Status)) {
  57     return Status;
  58   }
  59
  60   if (SwapBytes32(Response.returnCode) != TPM_SUCCESS) {
  61     DEBUG ((EFI_D_ERROR, "Tpm12PhysicalPresence: Response Code error! 0x%08x\r\n", SwapBytes32(Response.returnCode)));
  62     return EFI_DEVICE_ERROR;
  63   }
  64
  65   return EFI_SUCCESS;
  66 }