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 This program and the accompanying materials
   7 are licensed and made available under the terms and conditions of the BSD License
   8 which accompanies this distribution.  The full text of the license may be found at
   9 http://opensource.org/licenses/bsd-license.php
  10
  11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #include <PiPei.h>
  17 #include <Library/BaseMemoryLib.h>
  18 #include <Library/BaseLib.h>
  19 #include <Library/Tpm12DeviceLib.h>
  20 #include <Library/DebugLib.h>
  21
  22 #pragma pack(1)
  23
  24 typedef struct {
  25   TPM_RQU_COMMAND_HDR   Hdr;
  26   TPM_STARTUP_TYPE      TpmSt;
  27 } TPM_CMD_START_UP;
  28
  29 #pragma pack()
  30
  31 /**
  32   Send Startup command to TPM1.2.
  33
  34   @param TpmSt           Startup Type.
  35
  36   @retval EFI_SUCCESS      Operation completed successfully.
  37   @retval EFI_DEVICE_ERROR Unexpected device behavior.
  38 **/
  39 EFI_STATUS
  40 EFIAPI
  41 Tpm12Startup (
  42   IN TPM_STARTUP_TYPE  TpmSt
  43   )
  44 {
  45   EFI_STATUS           Status;
  46   TPM_CMD_START_UP     Command;
  47   TPM_RSP_COMMAND_HDR  Response;
  48   UINT32               Length;
  49
  50   //
  51   // send Tpm command TPM_ORD_Startup
  52   //
  53   Command.Hdr.tag       = SwapBytes16 (TPM_TAG_RQU_COMMAND);
  54   Command.Hdr.paramSize = SwapBytes32 (sizeof (Command));
  55   Command.Hdr.ordinal   = SwapBytes32 (TPM_ORD_Startup);
  56   Command.TpmSt         = SwapBytes16 (TpmSt);
  57   Length = sizeof (Response);
  58   Status = Tpm12SubmitCommand (sizeof (Command), (UINT8 *)&Command, &Length, (UINT8 *)&Response);
  59   if (EFI_ERROR (Status)) {
  60     return Status;
  61   }
  62   switch (SwapBytes32(Response.returnCode)) {
  63   case TPM_SUCCESS:
  64     DEBUG ((DEBUG_INFO, "TPM12Startup: TPM_SUCCESS\n"));
  65     return EFI_SUCCESS;
  66   case TPM_INVALID_POSTINIT:
  67     // In warm reset, TPM may response TPM_INVALID_POSTINIT
  68     DEBUG ((DEBUG_INFO, "TPM12Startup: TPM_INVALID_POSTINIT\n"));
  69     return EFI_SUCCESS;
  70   default:
  71     return EFI_DEVICE_ERROR;
  72   }
  73 }
  74
  75 /**
  76   Send SaveState command to TPM1.2.
  77
  78   @retval EFI_SUCCESS      Operation completed successfully.
  79   @retval EFI_DEVICE_ERROR Unexpected device behavior.
  80 **/
  81 EFI_STATUS
  82 EFIAPI
  83 Tpm12SaveState (
  84   VOID
  85   )
  86 {
  87   EFI_STATUS           Status;
  88   TPM_RQU_COMMAND_HDR  Command;
  89   TPM_RSP_COMMAND_HDR  Response;
  90   UINT32               Length;
  91
  92   //
  93   // send Tpm command TPM_ORD_SaveState
  94   //
  95   Command.tag        = SwapBytes16 (TPM_TAG_RQU_COMMAND);
  96   Command.paramSize  = SwapBytes32 (sizeof (Command));
  97   Command.ordinal    = SwapBytes32 (TPM_ORD_SaveState);
  98   Length = sizeof (Response);
  99   Status = Tpm12SubmitCommand (sizeof (Command), (UINT8 *)&Command, &Length, (UINT8 *)&Response);
 100   if (EFI_ERROR (Status)) {
 101     return Status;
 102   }
 103   switch (SwapBytes32 (Response.returnCode)) {
 104   case TPM_SUCCESS:
 105     return EFI_SUCCESS;
 106   default:
 107     return EFI_DEVICE_ERROR;
 108   }
 109 }