1 /** @file
2 This 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 - 2016, 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 Dump PTP register information.
26
27 @param[in] Register Pointer to PTP register.
28 **/
29 VOID
30 DumpPtpInfo (
31 IN VOID *Register
32 );
33
34 /**
35 This service enables the sending of commands to the TPM2.
36
37 @param[in] InputParameterBlockSize Size of the TPM2 input parameter block.
38 @param[in] InputParameterBlock Pointer to the TPM2 input parameter block.
39 @param[in,out] OutputParameterBlockSize Size of the TPM2 output parameter block.
40 @param[in] OutputParameterBlock Pointer to the TPM2 output parameter block.
41
42 @retval EFI_SUCCESS The command byte stream was successfully sent to the device and a response was successfully received.
43 @retval EFI_DEVICE_ERROR The command was not successfully sent to the device or a response was not successfully received from the device.
44 @retval EFI_BUFFER_TOO_SMALL The output parameter block is too small.
45 **/
46 EFI_STATUS
47 EFIAPI
48 DTpm2SubmitCommand (
49 IN UINT32 InputParameterBlockSize,
50 IN UINT8 *InputParameterBlock,
51 IN OUT UINT32 *OutputParameterBlockSize,
52 IN UINT8 *OutputParameterBlock
53 );
54
55 /**
56 This service requests use TPM2.
57
58 @retval EFI_SUCCESS Get the control of TPM2 chip.
59 @retval EFI_NOT_FOUND TPM2 not found.
60 @retval EFI_DEVICE_ERROR Unexpected device behavior.
61 **/
62 EFI_STATUS
63 EFIAPI
64 DTpm2RequestUseTpm (
65 VOID
66 );
67
68 TPM2_DEVICE_INTERFACE mDTpm2InternalTpm2Device = {
69 TPM_DEVICE_INTERFACE_TPM20_DTPM,
70 DTpm2SubmitCommand,
71 DTpm2RequestUseTpm,
72 };
73
74 /**
75 The function register DTPM2.0 instance.
76
77 @retval EFI_SUCCESS DTPM2.0 instance is registered, or system dose not surpport registr DTPM2.0 instance
78 **/
79 EFI_STATUS
80 EFIAPI
Tpm2InstanceLibDTpmConstructor(VOID)81 Tpm2InstanceLibDTpmConstructor (
82 VOID
83 )
84 {
85 EFI_STATUS Status;
86
87 Status = Tpm2RegisterTpm2DeviceLib (&mDTpm2InternalTpm2Device);
88 if ((Status == EFI_SUCCESS) || (Status == EFI_UNSUPPORTED)) {
89 //
90 // Unsupported means platform policy does not need this instance enabled.
91 //
92 if (Status == EFI_SUCCESS) {
93 DumpPtpInfo ((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));
94 }
95 return EFI_SUCCESS;
96 }
97 return Status;
98 }
99