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/** @file
Utility functions used by TPM PEI driver.
Copyright (c) 2005 - 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "TpmComm.h"
/**
Send a command to TPM for execution and return response data.
@param[in] PeiServices Describes the list of possible PEI Services.
@param[in] TisReg TPM register space base address.
@param[in] BufferIn Buffer for command data.
@param[in] SizeIn Size of command data.
@param[in, out] BufferOut Buffer for response data.
@param[in, out] SizeOut size of response data.
@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
TisTpmCommand (
IN EFI_PEI_SERVICES **PeiServices,
IN TIS_PC_REGISTERS_PTR TisReg,
IN UINT8 *BufferIn,
IN UINT32 SizeIn,
IN OUT UINT8 *BufferOut,
IN OUT UINT32 *SizeOut
);
/**
Send TPM_Startup command to TPM.
@param[in] PeiServices Describes the list of possible PEI Services.
@param[in] TpmHandle TPM handle.
@param[in] BootMode Boot mode.
@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
TpmCommStartup (
IN EFI_PEI_SERVICES **PeiServices,
IN TIS_TPM_HANDLE TpmHandle,
IN EFI_BOOT_MODE BootMode
)
{
EFI_STATUS Status;
TPM_STARTUP_TYPE TpmSt;
UINT32 TpmRecvSize;
UINT32 TpmSendSize;
TPM_CMD_START_UP SendBuffer;
UINT8 RecvBuffer[20];
TpmSt = TPM_ST_CLEAR;
if (BootMode == BOOT_ON_S3_RESUME) {
TpmSt = TPM_ST_STATE;
}
//
// send Tpm command TPM_ORD_Startup
//
TpmRecvSize = 20;
TpmSendSize = sizeof (TPM_CMD_START_UP);
SendBuffer.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND);
SendBuffer.Hdr.paramSize = SwapBytes32 (TpmSendSize);
SendBuffer.Hdr.ordinal = SwapBytes32 (TPM_ORD_Startup);
SendBuffer.TpmSt = SwapBytes16 (TpmSt);
Status = TisTpmCommand (PeiServices, TpmHandle, (UINT8 *)&SendBuffer, TpmSendSize, RecvBuffer, &TpmRecvSize);
return Status;
}
/**
Send TPM_ContinueSelfTest command to TPM.
@param[in] PeiServices Describes the list of possible PEI Services.
@param[in] TpmHandle TPM handle.
@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
TpmCommContinueSelfTest (
IN EFI_PEI_SERVICES **PeiServices,
IN TIS_TPM_HANDLE TpmHandle
)
{
EFI_STATUS Status;
UINT32 TpmRecvSize;
UINT32 TpmSendSize;
TPM_CMD_SELF_TEST SendBuffer;
UINT8 RecvBuffer[20];
//
// send Tpm command TPM_ORD_ContinueSelfTest
//
TpmRecvSize = 20;
TpmSendSize = sizeof (TPM_CMD_SELF_TEST);
SendBuffer.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND);
SendBuffer.Hdr.paramSize = SwapBytes32 (TpmSendSize);
SendBuffer.Hdr.ordinal = SwapBytes32 (TPM_ORD_ContinueSelfTest);
Status = TisTpmCommand (PeiServices, TpmHandle, (UINT8 *)&SendBuffer, TpmSendSize, RecvBuffer, &TpmRecvSize);
return Status;
}
/**
Get TPM capability flags.
@param[in] PeiServices Describes the list of possible PEI Services.
@param[in] TpmHandle TPM handle.
@param[out] Deactivated Returns deactivated flag.
@param[out] LifetimeLock Returns physicalPresenceLifetimeLock permanent flag.
@param[out] CmdEnable Returns physicalPresenceCMDEnable permanent flag.
@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
TpmCommGetCapability (
IN EFI_PEI_SERVICES **PeiServices,
IN TIS_TPM_HANDLE TpmHandle,
OUT BOOLEAN *Deactivated, OPTIONAL
OUT BOOLEAN *LifetimeLock, OPTIONAL
OUT BOOLEAN *CmdEnable OPTIONAL
)
{
EFI_STATUS Status;
UINT32 TpmRecvSize;
UINT32 TpmSendSize;
TPM_CMD_GET_CAPABILITY SendBuffer;
UINT8 RecvBuffer[40];
TPM_PERMANENT_FLAGS *TpmPermanentFlags;
//
// send Tpm command TPM_ORD_GetCapability
//
TpmRecvSize = 40;
TpmSendSize = sizeof (TPM_CMD_GET_CAPABILITY);
SendBuffer.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND);
SendBuffer.Hdr.paramSize = SwapBytes32 (TpmSendSize);
SendBuffer.Hdr.ordinal = SwapBytes32 (TPM_ORD_GetCapability);
SendBuffer.Capability = SwapBytes32 (TPM_CAP_FLAG);
SendBuffer.CapabilityFlagSize = SwapBytes32 (sizeof (TPM_CAP_FLAG_PERMANENT));
SendBuffer.CapabilityFlag = SwapBytes32 (TPM_CAP_FLAG_PERMANENT);
Status = TisTpmCommand (PeiServices, TpmHandle, (UINT8 *)&SendBuffer, TpmSendSize, RecvBuffer, &TpmRecvSize);
if (EFI_ERROR (Status)) {
return Status;
}
TpmPermanentFlags = (TPM_PERMANENT_FLAGS *)&RecvBuffer[sizeof (TPM_RSP_COMMAND_HDR) + sizeof (UINT32)];
if (Deactivated != NULL) {
*Deactivated = TpmPermanentFlags->deactivated;
}
if (LifetimeLock != NULL) {
*LifetimeLock = TpmPermanentFlags->physicalPresenceLifetimeLock;
}
if (CmdEnable != NULL) {
*CmdEnable = TpmPermanentFlags->physicalPresenceCMDEnable;
}
return Status;
}
/**
Extend a TPM PCR.
@param[in] PeiServices Describes the list of possible PEI Services.
@param[in] TpmHandle TPM handle.
@param[in] DigestToExtend The 160 bit value representing the event to be recorded.
@param[in] PcrIndex The PCR to be updated.
@param[out] NewPcrValue New PCR value after extend.
@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
TpmCommExtend (
IN EFI_PEI_SERVICES **PeiServices,
IN TIS_TPM_HANDLE TpmHandle,
IN TPM_DIGEST *DigestToExtend,
IN TPM_PCRINDEX PcrIndex,
OUT TPM_DIGEST *NewPcrValue
)
{
EFI_STATUS Status;
UINT32 TpmSendSize;
UINT32 TpmRecvSize;
TPM_CMD_EXTEND SendBuffer;
UINT8 RecvBuffer[10 + sizeof(TPM_DIGEST)];
//
// send Tpm command TPM_ORD_Extend
//
TpmRecvSize = sizeof (TPM_RSP_COMMAND_HDR) + sizeof (TPM_DIGEST);
TpmSendSize = sizeof (TPM_CMD_EXTEND);
SendBuffer.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND);
SendBuffer.Hdr.paramSize = SwapBytes32 (TpmSendSize);
SendBuffer.Hdr.ordinal = SwapBytes32 (TPM_ORD_Extend);
SendBuffer.PcrIndex = SwapBytes32 (PcrIndex);
CopyMem (&SendBuffer.TpmDigest, (UINT8 *)DigestToExtend, sizeof (TPM_DIGEST));
Status = TisTpmCommand (PeiServices, TpmHandle, (UINT8 *)&SendBuffer, TpmSendSize, RecvBuffer, &TpmRecvSize);
ASSERT_EFI_ERROR (Status);
if(NewPcrValue != NULL) {
CopyMem ((UINT8*)NewPcrValue, &RecvBuffer[10], sizeof (TPM_DIGEST));
}
return Status;
}
/**
Send TSC_PhysicalPresence command to TPM.
@param[in] PeiServices Describes the list of possible PEI Services.
@param[in] TpmHandle TPM handle.
@param[in] PhysicalPresence The state to set the TPMs Physical Presence flags.
@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
TpmCommPhysicalPresence (
IN EFI_PEI_SERVICES **PeiServices,
IN TIS_TPM_HANDLE TpmHandle,
IN TPM_PHYSICAL_PRESENCE PhysicalPresence
)
{
EFI_STATUS Status;
UINT32 TpmSendSize;
UINT32 TpmRecvSize;
TPM_CMD_PHYSICAL_PRESENCE SendBuffer;
UINT8 RecvBuffer[10];
//
// send Tpm command TSC_ORD_PhysicalPresence
//
TpmRecvSize = 10;
TpmSendSize = sizeof (TPM_CMD_PHYSICAL_PRESENCE);
SendBuffer.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND);
SendBuffer.Hdr.paramSize = SwapBytes32 (TpmSendSize);
SendBuffer.Hdr.ordinal = SwapBytes32 (TSC_ORD_PhysicalPresence);
SendBuffer.PhysicalPresence = SwapBytes16 (PhysicalPresence);
Status = TisTpmCommand (PeiServices, TpmHandle, (UINT8 *)&SendBuffer, TpmSendSize, RecvBuffer, &TpmRecvSize);
return Status;
}
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