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alder_lake_bios/Insyde/InsydeModulePkg/Library/Tpm2TisCommLib/TisPc.c

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/** @file
Basic TIS (TPM Interface Specification) functions.
;******************************************************************************
;* Copyright (c) 2013, Insyde Software Corp. All Rights Reserved.
;*
;* You may not reproduce, distribute, publish, display, perform, modify, adapt,
;* transmit, broadcast, present, recite, release, license or otherwise exploit
;* any part of this publication in any form, by any means, without the prior
;* written permission of Insyde Software Corporation.
;*
;******************************************************************************
*/
#include <PiPei.h>
#include <IndustryStandard/Tpm20.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/IoLib.h>
#include <Library/TimerLib.h>
#include <Library/DebugLib.h>
#include <Library/Tpm2TisCommLib.h>
/**
Check whether TPM chip exist.
@param[in] TisReg Pointer to TIS register.
@retval TRUE TPM chip exists.
@retval FALSE TPM chip is not found.
**/
BOOLEAN
TisPcPresenceCheck (
IN TIS_PC_REGISTERS_PTR TisReg
)
{
UINT8 RegRead;
RegRead = MmioRead8 ((UINTN)&TisReg->Access);
return (BOOLEAN)(RegRead != (UINT8)-1);
}
/**
Check whether the value of a TPM chip register satisfies the input BIT setting.
@param[in] Register Address port of register to be checked.
@param[in] BitSet Check these data bits are set.
@param[in] BitClear Check these data bits are clear.
@param[in] TimeOut The max wait time (unit MicroSecond) when checking register.
@retval EFI_SUCCESS The register satisfies the check bit.
@retval EFI_TIMEOUT The register can't run into the expected status in time.
**/
EFI_STATUS
EFIAPI
TisPcWaitRegisterBits (
IN UINT8 *Register,
IN UINT8 BitSet,
IN UINT8 BitClear,
IN UINT32 TimeOut
)
{
UINT8 RegRead;
UINT32 WaitTime;
for (WaitTime = 0; WaitTime < TimeOut; WaitTime += 30){
RegRead = MmioRead8 ((UINTN)Register);
if ((RegRead & BitSet) == BitSet && (RegRead & BitClear) == 0)
return EFI_SUCCESS;
MicroSecondDelay (30);
}
return EFI_TIMEOUT;
}
/**
Get BurstCount by reading the burstCount field of a TIS regiger
in the time of default TIS_TIMEOUT_D.
@param[in] TisReg Pointer to TIS register.
@param[out] BurstCount Pointer to a buffer to store the got BurstConut.
@retval EFI_SUCCESS Get BurstCount.
@retval EFI_INVALID_PARAMETER TisReg is NULL or BurstCount is NULL.
@retval EFI_TIMEOUT BurstCount can't be got in time.
**/
EFI_STATUS
EFIAPI
TisPcReadBurstCount (
IN TIS_PC_REGISTERS_PTR TisReg,
OUT UINT16 *BurstCount
)
{
UINT32 WaitTime;
UINT8 DataByte0;
UINT8 DataByte1;
if (BurstCount == NULL || TisReg == NULL) {
return EFI_INVALID_PARAMETER;
}
WaitTime = 0;
do {
//
// TIS_PC_REGISTERS_PTR->burstCount is UINT16, but it is not 2bytes aligned,
// so it needs to use MmioRead8 to read two times
//
DataByte0 = MmioRead8 ((UINTN)&TisReg->BurstCount);
DataByte1 = MmioRead8 ((UINTN)&TisReg->BurstCount + 1);
*BurstCount = (UINT16)((DataByte1 << 8) + DataByte0);
if (*BurstCount != 0) {
return EFI_SUCCESS;
}
MicroSecondDelay (30);
WaitTime += 30;
} while (WaitTime < TIS_TIMEOUT_D);
return EFI_TIMEOUT;
}
/**
Set TPM chip to ready state by sending ready command TIS_PC_STS_READY
to Status Register in time.
@param[in] TisReg Pointer to TIS register.
@retval EFI_SUCCESS TPM chip enters into ready state.
@retval EFI_INVALID_PARAMETER TisReg is NULL.
@retval EFI_TIMEOUT TPM chip can't be set to ready state in time.
**/
EFI_STATUS
EFIAPI
TisPcPrepareCommand (
IN TIS_PC_REGISTERS_PTR TisReg
)
{
EFI_STATUS Status;
if (TisReg == NULL) {
return EFI_INVALID_PARAMETER;
}
MmioWrite8 ((UINTN)&TisReg->Status, TIS_PC_STS_READY);
Status = TisPcWaitRegisterBits (
&TisReg->Status,
TIS_PC_STS_READY,
0,
TIS_TIMEOUT_B
);
return Status;
}
/**
Get the control of TPM chip by sending requestUse command TIS_PC_ACC_RQUUSE
to ACCESS Register in the time of default TIS_TIMEOUT_A.
@param[in] TisReg Pointer to TIS register.
@retval EFI_SUCCESS Get the control of TPM chip.
@retval EFI_INVALID_PARAMETER TisReg is NULL.
@retval EFI_NOT_FOUND TPM chip doesn't exit.
@retval EFI_TIMEOUT Can't get the TPM control in time.
**/
EFI_STATUS
EFIAPI
TisPcRequestUseTpm (
IN TIS_PC_REGISTERS_PTR TisReg
)
{
EFI_STATUS Status;
if (TisReg == NULL) {
return EFI_INVALID_PARAMETER;
}
if (!TisPcPresenceCheck (TisReg)) {
return EFI_NOT_FOUND;
}
MmioWrite8 ((UINTN)&TisReg->Access, TIS_PC_ACC_RQUUSE);
//
// No locality set before, ACCESS_X.activeLocality MUST be valid within TIMEOUT_A
//
Status = TisPcWaitRegisterBits (
&TisReg->Access,
(UINT8)(TIS_PC_ACC_ACTIVE |TIS_PC_VALID),
0,
TIS_TIMEOUT_A
);
return Status;
}
EFI_STATUS
TisSend (
IN TIS_PC_REGISTERS_PTR TisReg,
IN UINT8 *BufferIn,
IN UINT32 SizeIn
)
{
EFI_STATUS Status;
UINT16 BurstCount;
UINT32 Index;
{
DEBUG ((EFI_D_INFO, "TisTpmCommand Send - "));
for (Index = 0; Index < SizeIn; Index++) {
DEBUG ((EFI_D_INFO, "%02x ", BufferIn[Index]));
}
DEBUG ((EFI_D_INFO, "\n"));
}
Status = TisPcPrepareCommand (TisReg);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Tpm is not ready for command!\n"));
return EFI_DEVICE_ERROR;
}
//
// Send the command data to Tpm
//
Index = 0;
while (Index < SizeIn) {
Status = TisPcReadBurstCount (TisReg, &BurstCount);
if (EFI_ERROR (Status)) {
Status = EFI_DEVICE_ERROR;
goto Exit;
}
for (; BurstCount > 0 && Index < SizeIn; BurstCount--) {
MmioWrite8 ((UINTN)&TisReg->DataFifo, *(BufferIn + Index));
Index++;
}
}
//
// Check the Tpm status STS_EXPECT change from 1 to 0
//
Status = TisPcWaitRegisterBits (
&TisReg->Status,
(UINT8) TIS_PC_VALID,
TIS_PC_STS_EXPECT,
TIS_TIMEOUT_C
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "The send buffer too small!\n"));
Status = EFI_BUFFER_TOO_SMALL;
goto Exit;
}
//
// Executed the TPM command and waiting for the response data ready
//
MmioWrite8 ((UINTN)&TisReg->Status, TIS_PC_STS_GO);
Exit:
if (EFI_ERROR (Status)) {
MmioWrite8 ((UINTN)&TisReg->Status, TIS_PC_STS_READY);
}
return Status;
}
EFI_STATUS
TisReceive (
IN TIS_PC_REGISTERS_PTR TisReg,
IN UINT32 Timeout,
IN OUT UINT8 *BufferOut,
IN OUT UINT32 *SizeOut
)
{
UINT16 Data16;
UINT32 Data32;
UINT32 TpmOutSize;
EFI_STATUS Status;
UINT32 Index;
UINT16 BurstCount;
TpmOutSize = 0;
Status = TisPcWaitRegisterBits (
&TisReg->Status,
(UINT8)(TIS_PC_VALID | TIS_PC_STS_DATA),
0,
Timeout
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Wait for Tpm response data time out!!\n"));
Status = EFI_TIMEOUT;
goto Exit;
}
//
// Get response data header
//
Index = 0;
BurstCount = 0;
while (Index < sizeof (TPM2_RESPONSE_HEADER)) {
Status = TisPcReadBurstCount (TisReg, &BurstCount);
if (EFI_ERROR (Status)) {
Status = EFI_DEVICE_ERROR;
goto Exit;
}
for (; BurstCount > 0; BurstCount--) {
*(BufferOut + Index) = MmioRead8 ((UINTN)&TisReg->DataFifo);
Index++;
if (Index == sizeof (TPM2_RESPONSE_HEADER)) break;
}
}
{
DEBUG ((EFI_D_INFO, "TisTpmCommand ReceiveHeader - "));
for (Index = 0; Index < sizeof (TPM2_RESPONSE_HEADER); Index++) {
DEBUG ((EFI_D_INFO, "%02x ", BufferOut[Index]));
}
DEBUG ((EFI_D_INFO, "\n"));
}
//
// Check the reponse data header (tag,parasize and returncode )
//
CopyMem (&Data16, BufferOut, sizeof (UINT16));
if (SwapBytes16 (Data16) != TPM_ST_NO_SESSIONS &&
SwapBytes16 (Data16) != TPM_ST_SESSIONS) {
Status = EFI_DEVICE_ERROR;
goto Exit;
}
CopyMem (&Data32, (BufferOut + 2), sizeof (UINT32));
TpmOutSize = SwapBytes32 (Data32);
if (*SizeOut < TpmOutSize) {
Status = EFI_BUFFER_TOO_SMALL;
goto Exit;
}
*SizeOut = TpmOutSize;
//
// Continue reading the remaining data
//
while ( Index < TpmOutSize ) {
for (; BurstCount > 0; BurstCount--) {
*(BufferOut + Index) = MmioRead8 ((UINTN)&TisReg->DataFifo);
Index++;
if (Index == TpmOutSize) {
Status = EFI_SUCCESS;
goto Exit;
}
}
Status = TisPcReadBurstCount (TisReg, &BurstCount);
if (EFI_ERROR (Status)) {
Status = EFI_DEVICE_ERROR;
goto Exit;
}
}
Exit:
{
DEBUG ((EFI_D_INFO, "TisTpmCommand Receive - "));
for (Index = 0; Index < TpmOutSize; Index++) {
DEBUG ((EFI_D_INFO, "%02x ", BufferOut[Index]));
}
DEBUG ((EFI_D_INFO, "\n"));
}
if (Status != EFI_TIMEOUT ||
Timeout != TIS_SMM_TIMEOUT) {
MmioWrite8 ((UINTN)&TisReg->Status, TIS_PC_STS_READY);
}
return Status;
}
/**
Send a command to TPM for execution and return response data.
@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 TIS_PC_REGISTERS_PTR TisReg,
IN UINT32 Timeout,
IN UINT8 *BufferIn,
IN UINT32 SizeIn,
IN OUT UINT8 *BufferOut,
IN OUT UINT32 *SizeOut
)
{
EFI_STATUS Status;
Status = TisSend (TisReg, BufferIn, SizeIn);
if (EFI_ERROR (Status)) {
return Status;
}
Status = TisReceive (TisReg, Timeout, BufferOut, SizeOut);
if (EFI_ERROR (Status)) {
return Status;
}
return EFI_SUCCESS;
}
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