SecurityPkg/Library/Tpm12CommandLib/Tpm12Startup.c

   1 /** @file
   2   Implement TPM1.2 Startup related command.
   3
   4 Copyright (c) 2013, Intel Corporation. All rights reserved. <BR>
   5 (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
   6 SPDX-License-Identifier: BSD-2-Clause-Patent
   7
   8 **/
   9
  10 #include <PiPei.h>
  11 #include <Library/BaseMemoryLib.h>
  12 #include <Library/BaseLib.h>
  13 #include <Library/Tpm12DeviceLib.h>
  14 #include <Library/DebugLib.h>
  15
  16 #pragma pack(1)
  17
  18 typedef struct {
  19   TPM_RQU_COMMAND_HDR   Hdr;
  20   TPM_STARTUP_TYPE      TpmSt;
  21 } TPM_CMD_START_UP;
  22
  23 #pragma pack()
  24
  25 /**
  26   Send Startup command to TPM1.2.
  27
  28   @param TpmSt           Startup Type.
  29
  30   @retval EFI_SUCCESS      Operation completed successfully.
  31   @retval EFI_DEVICE_ERROR Unexpected device behavior.
  32 **/
  33 EFI_STATUS
  34 EFIAPI
  35 Tpm12Startup (
  36   IN TPM_STARTUP_TYPE  TpmSt
  37   )
  38 {
  39   EFI_STATUS           Status;
  40   TPM_CMD_START_UP     Command;
  41   TPM_RSP_COMMAND_HDR  Response;
  42   UINT32               Length;
  43
  44   //
  45   // send Tpm command TPM_ORD_Startup
  46   //
  47   Command.Hdr.tag       = SwapBytes16 (TPM_TAG_RQU_COMMAND);
  48   Command.Hdr.paramSize = SwapBytes32 (sizeof (Command));
  49   Command.Hdr.ordinal   = SwapBytes32 (TPM_ORD_Startup);
  50   Command.TpmSt         = SwapBytes16 (TpmSt);
  51   Length = sizeof (Response);
  52   Status = Tpm12SubmitCommand (sizeof (Command), (UINT8 *)&Command, &Length, (UINT8 *)&Response);
  53   if (EFI_ERROR (Status)) {
  54     return Status;
  55   }
  56   switch (SwapBytes32(Response.returnCode)) {
  57   case TPM_SUCCESS:
  58     DEBUG ((DEBUG_INFO, "TPM12Startup: TPM_SUCCESS\n"));
  59     return EFI_SUCCESS;
  60   case TPM_INVALID_POSTINIT:
  61     // In warm reset, TPM may response TPM_INVALID_POSTINIT
  62     DEBUG ((DEBUG_INFO, "TPM12Startup: TPM_INVALID_POSTINIT\n"));
  63     return EFI_SUCCESS;
  64   default:
  65     return EFI_DEVICE_ERROR;
  66   }
  67 }
  68
  69 /**
  70   Send SaveState command to TPM1.2.
  71
  72   @retval EFI_SUCCESS      Operation completed successfully.
  73   @retval EFI_DEVICE_ERROR Unexpected device behavior.
  74 **/
  75 EFI_STATUS
  76 EFIAPI
  77 Tpm12SaveState (
  78   VOID
  79   )
  80 {
  81   EFI_STATUS           Status;
  82   TPM_RQU_COMMAND_HDR  Command;
  83   TPM_RSP_COMMAND_HDR  Response;
  84   UINT32               Length;
  85
  86   //
  87   // send Tpm command TPM_ORD_SaveState
  88   //
  89   Command.tag        = SwapBytes16 (TPM_TAG_RQU_COMMAND);
  90   Command.paramSize  = SwapBytes32 (sizeof (Command));
  91   Command.ordinal    = SwapBytes32 (TPM_ORD_SaveState);
  92   Length = sizeof (Response);
  93   Status = Tpm12SubmitCommand (sizeof (Command), (UINT8 *)&Command, &Length, (UINT8 *)&Response);
  94   if (EFI_ERROR (Status)) {
  95     return Status;
  96   }
  97   switch (SwapBytes32 (Response.returnCode)) {
  98   case TPM_SUCCESS:
  99     return EFI_SUCCESS;
 100   default:
 101     return EFI_DEVICE_ERROR;
 102   }
 103 }