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/** @file
Implement TPM2 Startup related command.
Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved. <BR>
(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <IndustryStandard/UefiTcgPlatform.h>
#include <Library/Tpm2CommandLib.h>
#include <Library/Tpm2DeviceLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#pragma pack(1)
typedef struct {
TPM2_COMMAND_HEADER Header;
TPM_SU StartupType;
} TPM2_STARTUP_COMMAND;
typedef struct {
TPM2_RESPONSE_HEADER Header;
} TPM2_STARTUP_RESPONSE;
typedef struct {
TPM2_COMMAND_HEADER Header;
TPM_SU ShutdownType;
} TPM2_SHUTDOWN_COMMAND;
typedef struct {
TPM2_RESPONSE_HEADER Header;
} TPM2_SHUTDOWN_RESPONSE;
#pragma pack()
/**
Send Startup command to TPM2.
@param[in] StartupType TPM_SU_CLEAR or TPM_SU_STATE
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
Tpm2Startup (
IN TPM_SU StartupType
)
{
EFI_STATUS Status;
TPM2_STARTUP_COMMAND Cmd;
TPM2_STARTUP_RESPONSE Res;
UINT32 ResultBufSize;
TPM_RC ResponseCode;
Cmd.Header.tag = SwapBytes16(TPM_ST_NO_SESSIONS);
Cmd.Header.paramSize = SwapBytes32(sizeof(Cmd));
Cmd.Header.commandCode = SwapBytes32(TPM_CC_Startup);
Cmd.StartupType = SwapBytes16(StartupType);
ResultBufSize = sizeof(Res);
Status = Tpm2SubmitCommand (sizeof(Cmd), (UINT8 *)&Cmd, &ResultBufSize, (UINT8 *)&Res);
if (EFI_ERROR(Status)) {
return Status;
}
ResponseCode = SwapBytes32(Res.Header.responseCode);
switch (ResponseCode) {
case TPM_RC_SUCCESS:
DEBUG ((DEBUG_INFO, "TPM2Startup: TPM_RC_SUCCESS\n"));
return EFI_SUCCESS;
case TPM_RC_INITIALIZE:
// TPM_RC_INITIALIZE can be returned if Tpm2Startup is not required.
DEBUG ((DEBUG_INFO, "TPM2Startup: TPM_RC_INITIALIZE\n"));
return EFI_SUCCESS;
default:
DEBUG ((EFI_D_ERROR, "Tpm2Startup: Response Code error! 0x%08x\r\n", ResponseCode));
return EFI_DEVICE_ERROR;
}
}
/**
Send Shutdown command to TPM2.
@param[in] ShutdownType TPM_SU_CLEAR or TPM_SU_STATE.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
Tpm2Shutdown (
IN TPM_SU ShutdownType
)
{
EFI_STATUS Status;
TPM2_SHUTDOWN_COMMAND Cmd;
TPM2_SHUTDOWN_RESPONSE Res;
UINT32 ResultBufSize;
Cmd.Header.tag = SwapBytes16(TPM_ST_NO_SESSIONS);
Cmd.Header.paramSize = SwapBytes32(sizeof(Cmd));
Cmd.Header.commandCode = SwapBytes32(TPM_CC_Shutdown);
Cmd.ShutdownType = SwapBytes16(ShutdownType);
ResultBufSize = sizeof(Res);
Status = Tpm2SubmitCommand (sizeof(Cmd), (UINT8 *)&Cmd, &ResultBufSize, (UINT8 *)&Res);
if (EFI_ERROR(Status)) {
return Status;
}
if (SwapBytes32(Res.Header.responseCode) != TPM_RC_SUCCESS) {
DEBUG ((EFI_D_ERROR, "Tpm2Shutdown: Response Code error! 0x%08x\r\n", SwapBytes32(Res.Header.responseCode)));
return EFI_DEVICE_ERROR;
}
return EFI_SUCCESS;
}
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