/** @file | |
Implement TPM1.2 Get Capabilities related commands. | |
Copyright (c) 2016 - 2018, Intel Corporation. All rights reserved. <BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
#include <PiPei.h> | |
#include <Library/Tpm12CommandLib.h> | |
#include <Library/BaseLib.h> | |
#include <Library/DebugLib.h> | |
#include <Library/BaseMemoryLib.h> | |
#include <Library/Tpm12DeviceLib.h> | |
#pragma pack(1) | |
typedef struct { | |
TPM_RQU_COMMAND_HDR Hdr; | |
UINT32 Capability; | |
UINT32 CapabilityFlagSize; | |
UINT32 CapabilityFlag; | |
} TPM_CMD_GET_CAPABILITY; | |
typedef struct { | |
TPM_RSP_COMMAND_HDR Hdr; | |
UINT32 ResponseSize; | |
TPM_PERMANENT_FLAGS Flags; | |
} TPM_RSP_GET_CAPABILITY_PERMANENT_FLAGS; | |
typedef struct { | |
TPM_RSP_COMMAND_HDR Hdr; | |
UINT32 ResponseSize; | |
TPM_STCLEAR_FLAGS Flags; | |
} TPM_RSP_GET_CAPABILITY_STCLEAR_FLAGS; | |
#pragma pack() | |
/** | |
Get TPM capability permanent flags. | |
@param[out] TpmPermanentFlags Pointer to the buffer for returned flag structure. | |
@retval EFI_SUCCESS Operation completed successfully. | |
@retval EFI_TIMEOUT The register can't run into the expected status in time. | |
@retval EFI_BUFFER_TOO_SMALL Response data buffer is too small. | |
@retval EFI_DEVICE_ERROR Unexpected device behavior. | |
**/ | |
EFI_STATUS | |
EFIAPI | |
Tpm12GetCapabilityFlagPermanent ( | |
OUT TPM_PERMANENT_FLAGS *TpmPermanentFlags | |
) | |
{ | |
EFI_STATUS Status; | |
TPM_CMD_GET_CAPABILITY Command; | |
TPM_RSP_GET_CAPABILITY_PERMANENT_FLAGS Response; | |
UINT32 Length; | |
// | |
// send Tpm command TPM_ORD_GetCapability | |
// | |
Command.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND); | |
Command.Hdr.paramSize = SwapBytes32 (sizeof (Command)); | |
Command.Hdr.ordinal = SwapBytes32 (TPM_ORD_GetCapability); | |
Command.Capability = SwapBytes32 (TPM_CAP_FLAG); | |
Command.CapabilityFlagSize = SwapBytes32 (sizeof (TPM_CAP_FLAG_PERMANENT)); | |
Command.CapabilityFlag = SwapBytes32 (TPM_CAP_FLAG_PERMANENT); | |
Length = sizeof (Response); | |
Status = Tpm12SubmitCommand (sizeof (Command), (UINT8 *)&Command, &Length, (UINT8 *)&Response); | |
if (EFI_ERROR (Status)) { | |
return Status; | |
} | |
if (SwapBytes32 (Response.Hdr.returnCode) != TPM_SUCCESS) { | |
DEBUG ((DEBUG_ERROR, "Tpm12GetCapabilityFlagPermanent: Response Code error! 0x%08x\r\n", SwapBytes32 (Response.Hdr.returnCode))); | |
return EFI_DEVICE_ERROR; | |
} | |
ZeroMem (TpmPermanentFlags, sizeof (*TpmPermanentFlags)); | |
CopyMem (TpmPermanentFlags, &Response.Flags, MIN (sizeof (*TpmPermanentFlags), SwapBytes32 (Response.ResponseSize))); | |
return Status; | |
} | |
/** | |
Get TPM capability volatile flags. | |
@param[out] VolatileFlags Pointer to the buffer for returned flag structure. | |
@retval EFI_SUCCESS Operation completed successfully. | |
@retval EFI_DEVICE_ERROR The command was unsuccessful. | |
**/ | |
EFI_STATUS | |
EFIAPI | |
Tpm12GetCapabilityFlagVolatile ( | |
OUT TPM_STCLEAR_FLAGS *VolatileFlags | |
) | |
{ | |
EFI_STATUS Status; | |
TPM_CMD_GET_CAPABILITY Command; | |
TPM_RSP_GET_CAPABILITY_STCLEAR_FLAGS Response; | |
UINT32 Length; | |
// | |
// send Tpm command TPM_ORD_GetCapability | |
// | |
Command.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND); | |
Command.Hdr.paramSize = SwapBytes32 (sizeof (Command)); | |
Command.Hdr.ordinal = SwapBytes32 (TPM_ORD_GetCapability); | |
Command.Capability = SwapBytes32 (TPM_CAP_FLAG); | |
Command.CapabilityFlagSize = SwapBytes32 (sizeof (TPM_CAP_FLAG_VOLATILE)); | |
Command.CapabilityFlag = SwapBytes32 (TPM_CAP_FLAG_VOLATILE); | |
Length = sizeof (Response); | |
Status = Tpm12SubmitCommand (sizeof (Command), (UINT8 *)&Command, &Length, (UINT8 *)&Response); | |
if (EFI_ERROR (Status)) { | |
return Status; | |
} | |
if (SwapBytes32 (Response.Hdr.returnCode) != TPM_SUCCESS) { | |
DEBUG ((DEBUG_ERROR, "Tpm12GetCapabilityFlagVolatile: Response Code error! 0x%08x\r\n", SwapBytes32 (Response.Hdr.returnCode))); | |
return EFI_DEVICE_ERROR; | |
} | |
ZeroMem (VolatileFlags, sizeof (*VolatileFlags)); | |
CopyMem (VolatileFlags, &Response.Flags, MIN (sizeof (*VolatileFlags), SwapBytes32 (Response.ResponseSize))); | |
return Status; | |
} |