1 /** @file
2 Ihis library is TPM2 device router. Platform can register multi TPM2 instance to it
3 via PcdTpmInstanceGuid. Platform need make choice that which one will be final one.
4 At most one TPM2 instance can be finally registered, and other will return unsupported.
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/PcdLib.h>
21 #include <Library/Tpm2DeviceLib.h>
22
23 TPM2_DEVICE_INTERFACE mInternalTpm2DeviceInterface;
24
25 /**
26 This service enables the sending of commands to the TPM2.
27
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.
32
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.
36 **/
37 EFI_STATUS
38 EFIAPI
Tpm2SubmitCommand(IN UINT32 InputParameterBlockSize,IN UINT8 * InputParameterBlock,IN OUT UINT32 * OutputParameterBlockSize,IN UINT8 * OutputParameterBlock)39 Tpm2SubmitCommand (
40 IN UINT32 InputParameterBlockSize,
41 IN UINT8 *InputParameterBlock,
42 IN OUT UINT32 *OutputParameterBlockSize,
43 IN UINT8 *OutputParameterBlock
44 )
45 {
46 if (mInternalTpm2DeviceInterface.Tpm2SubmitCommand == NULL) {
47 return EFI_UNSUPPORTED;
48 }
49 return mInternalTpm2DeviceInterface.Tpm2SubmitCommand (
50 InputParameterBlockSize,
51 InputParameterBlock,
52 OutputParameterBlockSize,
53 OutputParameterBlock
54 );
55 }
56
57 /**
58 This service requests use TPM2.
59
60 @retval EFI_SUCCESS Get the control of TPM2 chip.
61 @retval EFI_NOT_FOUND TPM2 not found.
62 @retval EFI_DEVICE_ERROR Unexpected device behavior.
63 **/
64 EFI_STATUS
65 EFIAPI
Tpm2RequestUseTpm(VOID)66 Tpm2RequestUseTpm (
67 VOID
68 )
69 {
70 if (mInternalTpm2DeviceInterface.Tpm2RequestUseTpm == NULL) {
71 return EFI_UNSUPPORTED;
72 }
73 return mInternalTpm2DeviceInterface.Tpm2RequestUseTpm ();
74 }
75
76 /**
77 This service register TPM2 device.
78
79 @param Tpm2Device TPM2 device
80
81 @retval EFI_SUCCESS This TPM2 device is registered successfully.
82 @retval EFI_UNSUPPORTED System does not support register this TPM2 device.
83 @retval EFI_ALREADY_STARTED System already register this TPM2 device.
84 **/
85 EFI_STATUS
86 EFIAPI
Tpm2RegisterTpm2DeviceLib(IN TPM2_DEVICE_INTERFACE * Tpm2Device)87 Tpm2RegisterTpm2DeviceLib (
88 IN TPM2_DEVICE_INTERFACE *Tpm2Device
89 )
90 {
91 if (!CompareGuid (PcdGetPtr(PcdTpmInstanceGuid), &Tpm2Device->ProviderGuid)){
92 DEBUG ((EFI_D_ERROR, "WARNING: Tpm2RegisterTpm2DeviceLib - does not support %g registration\n", &Tpm2Device->ProviderGuid));
93 return EFI_UNSUPPORTED;
94 }
95
96 CopyMem (&mInternalTpm2DeviceInterface, Tpm2Device, sizeof(mInternalTpm2DeviceInterface));
97 return EFI_SUCCESS;
98 }
99