2 Ihis library is TPM2 TREE protocol lib.
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
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.
15 #include <Library/BaseLib.h>
16 #include <Library/BaseMemoryLib.h>
17 #include <Library/DebugLib.h>
18 #include <Library/UefiBootServicesTableLib.h>
19 #include <Library/Tpm2DeviceLib.h>
20 #include <Protocol/TrEEProtocol.h>
21 #include <IndustryStandard/Tpm20.h>
23 EFI_TREE_PROTOCOL
*mTreeProtocol
= NULL
;
26 This service enables the sending of commands to the TPM2.
28 @param[in] InputParameterBlockSize Size of the TPM2 input parameter block.
29 @param[in] InputParameterBlock Pointer to the TPM2 input parameter block.
30 @param[in,out] OutputParameterBlockSize Size of the TPM2 output parameter block.
31 @param[in] OutputParameterBlock Pointer to the TPM2 output parameter block.
33 @retval EFI_SUCCESS The command byte stream was successfully sent to the device and a response was successfully received.
34 @retval EFI_DEVICE_ERROR The command was not successfully sent to the device or a response was not successfully received from the device.
35 @retval EFI_BUFFER_TOO_SMALL The output parameter block is too small.
40 IN UINT32 InputParameterBlockSize
,
41 IN UINT8
*InputParameterBlock
,
42 IN OUT UINT32
*OutputParameterBlockSize
,
43 IN UINT8
*OutputParameterBlock
47 TPM2_RESPONSE_HEADER
*Header
;
49 if (mTreeProtocol
== NULL
) {
50 Status
= gBS
->LocateProtocol (&gEfiTrEEProtocolGuid
, NULL
, (VOID
**) &mTreeProtocol
);
51 if (EFI_ERROR (Status
)) {
53 // TrEE protocol is not installed. So, TPM2 is not present.
55 DEBUG ((EFI_D_ERROR
, "Tpm2SubmitCommand - TrEE - %r\n", Status
));
60 // Assume when TrEE Protocol is ready, RequestUseTpm already done.
62 Status
= mTreeProtocol
->SubmitCommand (
64 InputParameterBlockSize
,
66 *OutputParameterBlockSize
,
69 if (EFI_ERROR (Status
)) {
72 Header
= (TPM2_RESPONSE_HEADER
*)OutputParameterBlock
;
73 *OutputParameterBlockSize
= SwapBytes32 (Header
->paramSize
);
79 This service requests use TPM2.
81 @retval EFI_SUCCESS Get the control of TPM2 chip.
82 @retval EFI_NOT_FOUND TPM2 not found.
83 @retval EFI_DEVICE_ERROR Unexpected device behavior.
93 if (mTreeProtocol
== NULL
) {
94 Status
= gBS
->LocateProtocol (&gEfiTrEEProtocolGuid
, NULL
, (VOID
**) &mTreeProtocol
);
95 if (EFI_ERROR (Status
)) {
97 // TrEE protocol is not installed. So, TPM2 is not present.
99 DEBUG ((EFI_D_ERROR
, "Tpm2RequestUseTpm - TrEE - %r\n", Status
));
100 return EFI_NOT_FOUND
;
104 // Assume when TrEE Protocol is ready, RequestUseTpm already done.
110 This service register TPM2 device.
112 @param Tpm2Device TPM2 device
114 @retval EFI_SUCCESS This TPM2 device is registered successfully.
115 @retval EFI_UNSUPPORTED System does not support register this TPM2 device.
116 @retval EFI_ALREADY_STARTED System already register this TPM2 device.
120 Tpm2RegisterTpm2DeviceLib (
121 IN TPM2_DEVICE_INTERFACE
*Tpm2Device
124 return EFI_UNSUPPORTED
;