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 This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <Uefi.h>
  16 #include <IndustryStandard/Tpm12.h>
  17 #include <Library/BaseMemoryLib.h>
  18 #include <Library/BaseLib.h>
  19 #include <Library/Tpm12DeviceLib.h>
  20
  21 #pragma pack(1)
  22
  23 typedef struct {
  24   TPM_RQU_COMMAND_HDR   Hdr;
  25   TPM_STARTUP_TYPE      TpmSt;
  26 } TPM_CMD_START_UP;
  27
  28 typedef struct {
  29   TPM_RSP_COMMAND_HDR   Hdr;
  30 } TPM_RSP_START_UP;
  31
  32 typedef struct {
  33   TPM_RQU_COMMAND_HDR   Hdr;
  34 } TPM_CMD_SAVE_STATE;
  35
  36 typedef struct {
  37   TPM_RSP_COMMAND_HDR   Hdr;
  38 } TPM_RSP_SAVE_STATE;
  39
  40 #pragma pack()
  41
  42 /**
  43   Send Startup command to TPM1.2.
  44
  45   @param TpmSt           Startup Type.
  46
  47   @retval EFI_SUCCESS      Operation completed successfully.
  48   @retval EFI_DEVICE_ERROR Unexpected device behavior.
  49 **/
  50 EFI_STATUS
  51 EFIAPI
  52 Tpm12Startup (
  53   IN TPM_STARTUP_TYPE          TpmSt
  54   )
  55 {
  56   EFI_STATUS                        Status;
  57   UINT32                            TpmRecvSize;
  58   UINT32                            TpmSendSize;
  59   TPM_CMD_START_UP                  SendBuffer;
  60   TPM_RSP_START_UP                  RecvBuffer;
  61   UINT32                            ReturnCode;
  62
  63   //
  64   // send Tpm command TPM_ORD_Startup
  65   //
  66   TpmRecvSize               = sizeof (TPM_RSP_START_UP);
  67   TpmSendSize               = sizeof (TPM_CMD_START_UP);
  68   SendBuffer.Hdr.tag        = SwapBytes16 (TPM_TAG_RQU_COMMAND);
  69   SendBuffer.Hdr.paramSize  = SwapBytes32 (TpmSendSize);
  70   SendBuffer.Hdr.ordinal    = SwapBytes32 (TPM_ORD_Startup);
  71   SendBuffer.TpmSt          = SwapBytes16 (TpmSt);
  72
  73   Status = Tpm12SubmitCommand (TpmSendSize, (UINT8 *)&SendBuffer, &TpmRecvSize, (UINT8 *)&RecvBuffer);
  74   if (EFI_ERROR (Status)) {
  75     return Status;
  76   }
  77   ReturnCode = SwapBytes32(RecvBuffer.Hdr.returnCode);
  78   switch (ReturnCode) {
  79   case TPM_SUCCESS:
  80   case TPM_INVALID_POSTINIT:
  81     // In warm reset, TPM may response TPM_INVALID_POSTINIT
  82     return EFI_SUCCESS;
  83   default:
  84     return EFI_DEVICE_ERROR;
  85   }
  86 }
  87
  88 /**
  89   Send SaveState command to TPM1.2.
  90
  91   @retval EFI_SUCCESS      Operation completed successfully.
  92   @retval EFI_DEVICE_ERROR Unexpected device behavior.
  93 **/
  94 EFI_STATUS
  95 EFIAPI
  96 Tpm12SaveState (
  97   VOID
  98   )
  99 {
 100   EFI_STATUS                        Status;
 101   UINT32                            TpmRecvSize;
 102   UINT32                            TpmSendSize;
 103   TPM_CMD_SAVE_STATE                SendBuffer;
 104   TPM_RSP_SAVE_STATE                RecvBuffer;
 105   UINT32                            ReturnCode;
 106
 107   //
 108   // send Tpm command TPM_ORD_SaveState
 109   //
 110   TpmRecvSize               = sizeof (TPM_RSP_SAVE_STATE);
 111   TpmSendSize               = sizeof (TPM_CMD_SAVE_STATE);
 112   SendBuffer.Hdr.tag        = SwapBytes16 (TPM_TAG_RQU_COMMAND);
 113   SendBuffer.Hdr.paramSize  = SwapBytes32 (TpmSendSize);
 114   SendBuffer.Hdr.ordinal    = SwapBytes32 (TPM_ORD_SaveState);
 115
 116   Status = Tpm12SubmitCommand (TpmSendSize, (UINT8 *)&SendBuffer, &TpmRecvSize, (UINT8 *)&RecvBuffer);
 117   if (EFI_ERROR (Status)) {
 118     return Status;
 119   }
 120   ReturnCode = SwapBytes32(RecvBuffer.Hdr.returnCode);
 121   switch (ReturnCode) {
 122   case TPM_SUCCESS:
 123     return EFI_SUCCESS;
 124   default:
 125     return EFI_DEVICE_ERROR;
 126   }
 127 }