1 /** @file
2 Ihis library is TPM2 DTPM instance.
3 It can be registered to Tpm2 Device router, to be active TPM2 engine,
4 based on platform setting.
5
6 Copyright (c) 2013, Intel Corporation. All rights reserved. <BR>
7 This program and the accompanying materials
8 are licensed and made available under the terms and conditions of the BSD License
9 which accompanies this distribution. The full text of the license may be found at
10 http://opensource.org/licenses/bsd-license.php
11
12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
14
15 **/
16
17 #include <Library/BaseLib.h>
18 #include <Library/BaseMemoryLib.h>
19 #include <Library/DebugLib.h>
20 #include <Library/Tpm2DeviceLib.h>
21
22 #include <Guid/TpmInstance.h>
23
24 /**
25 This service enables the sending of commands to the TPM2.
26
27 @param[in] InputParameterBlockSize Size of the TPM2 input parameter block.
28 @param[in] InputParameterBlock Pointer to the TPM2 input parameter block.
29 @param[in,out] OutputParameterBlockSize Size of the TPM2 output parameter block.
30 @param[in] OutputParameterBlock Pointer to the TPM2 output parameter block.
31
32 @retval EFI_SUCCESS The command byte stream was successfully sent to the device and a response was successfully received.
33 @retval EFI_DEVICE_ERROR The command was not successfully sent to the device or a response was not successfully received from the device.
34 @retval EFI_BUFFER_TOO_SMALL The output parameter block is too small.
35 **/
36 EFI_STATUS
37 EFIAPI
38 DTpm2SubmitCommand (
39 IN UINT32 InputParameterBlockSize,
40 IN UINT8 *InputParameterBlock,
41 IN OUT UINT32 *OutputParameterBlockSize,
42 IN UINT8 *OutputParameterBlock
43 );
44
45 /**
46 This service requests use TPM2.
47
48 @retval EFI_SUCCESS Get the control of TPM2 chip.
49 @retval EFI_NOT_FOUND TPM2 not found.
50 @retval EFI_DEVICE_ERROR Unexpected device behavior.
51 **/
52 EFI_STATUS
53 EFIAPI
54 DTpm2RequestUseTpm (
55 VOID
56 );
57
58 TPM2_DEVICE_INTERFACE mDTpm2InternalTpm2Device = {
59 TPM_DEVICE_INTERFACE_TPM20_DTPM,
60 DTpm2SubmitCommand,
61 DTpm2RequestUseTpm,
62 };
63
64 /**
65 The function register DTPM2.0 instance.
66
67 @retval EFI_SUCCESS DTPM2.0 instance is registered, or system dose not surpport registr DTPM2.0 instance
68 **/
69 EFI_STATUS
70 EFIAPI
Tpm2InstanceLibDTpmConstructor(VOID)71 Tpm2InstanceLibDTpmConstructor (
72 VOID
73 )
74 {
75 EFI_STATUS Status;
76
77 Status = Tpm2RegisterTpm2DeviceLib (&mDTpm2InternalTpm2Device);
78 if ((Status == EFI_SUCCESS) || (Status == EFI_UNSUPPORTED)) {
79 //
80 // Unsupported means platform policy does not need this instance enabled.
81 //
82 return EFI_SUCCESS;
83 }
84 return Status;
85 }
86