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c1d93242 | 1 | /** @file\r |
07309c3d | 2 | This library is TPM2 device router. Platform can register multi TPM2 instance to it\r |
c1d93242 JY |
3 | via PcdTpmInstanceGuid. Platform need make choice that which one will be final one.\r |
4 | At most one TPM2 instance can be finally registered, and other will return unsupported.\r | |
5 | \r | |
b3548d32 | 6 | Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved. <BR>\r |
289b714b | 7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
c1d93242 JY |
8 | \r |
9 | **/\r | |
10 | \r | |
11 | #include <Library/BaseLib.h>\r | |
12 | #include <Library/BaseMemoryLib.h>\r | |
13 | #include <Library/HobLib.h>\r | |
14 | #include <Library/DebugLib.h>\r | |
15 | #include <Library/PcdLib.h>\r | |
16 | #include <Library/Tpm2DeviceLib.h>\r | |
17 | \r | |
18 | EFI_GUID mInternalTpm2DeviceInterfaceGuid = {\r | |
859b0db4 | 19 | 0x349cf818, 0xc0ba, 0x4c43, { 0x92, 0x9a, 0xc8, 0xa1, 0xb1, 0xb3, 0xd2, 0x55 }\r |
c1d93242 JY |
20 | };\r |
21 | \r | |
22 | /**\r | |
23 | This function get TPM2.0 interface.\r | |
24 | \r | |
25 | @retval TPM2.0 interface.\r | |
26 | **/\r | |
27 | TPM2_DEVICE_INTERFACE *\r | |
28 | InternalGetTpm2DeviceInterface (\r | |
29 | VOID\r | |
30 | )\r | |
31 | {\r | |
32 | EFI_HOB_GUID_TYPE *Hob;\r | |
33 | \r | |
34 | Hob = GetFirstGuidHob (&mInternalTpm2DeviceInterfaceGuid);\r | |
35 | if (Hob == NULL) {\r | |
36 | return NULL;\r | |
37 | }\r | |
38 | return (TPM2_DEVICE_INTERFACE *)(Hob + 1);\r | |
39 | }\r | |
40 | \r | |
41 | /**\r | |
42 | This service enables the sending of commands to the TPM2.\r | |
43 | \r | |
44 | @param[in] InputParameterBlockSize Size of the TPM2 input parameter block.\r | |
45 | @param[in] InputParameterBlock Pointer to the TPM2 input parameter block.\r | |
46 | @param[in,out] OutputParameterBlockSize Size of the TPM2 output parameter block.\r | |
47 | @param[in] OutputParameterBlock Pointer to the TPM2 output parameter block.\r | |
48 | \r | |
49 | @retval EFI_SUCCESS The command byte stream was successfully sent to the device and a response was successfully received.\r | |
50 | @retval EFI_DEVICE_ERROR The command was not successfully sent to the device or a response was not successfully received from the device.\r | |
b3548d32 | 51 | @retval EFI_BUFFER_TOO_SMALL The output parameter block is too small.\r |
c1d93242 JY |
52 | **/\r |
53 | EFI_STATUS\r | |
54 | EFIAPI\r | |
55 | Tpm2SubmitCommand (\r | |
56 | IN UINT32 InputParameterBlockSize,\r | |
57 | IN UINT8 *InputParameterBlock,\r | |
58 | IN OUT UINT32 *OutputParameterBlockSize,\r | |
59 | IN UINT8 *OutputParameterBlock\r | |
60 | )\r | |
61 | {\r | |
62 | TPM2_DEVICE_INTERFACE *Tpm2DeviceInterface;\r | |
63 | \r | |
64 | Tpm2DeviceInterface = InternalGetTpm2DeviceInterface ();\r | |
65 | if (Tpm2DeviceInterface == NULL) {\r | |
66 | return EFI_UNSUPPORTED;\r | |
67 | }\r | |
68 | \r | |
69 | return Tpm2DeviceInterface->Tpm2SubmitCommand (\r | |
70 | InputParameterBlockSize,\r | |
71 | InputParameterBlock,\r | |
72 | OutputParameterBlockSize,\r | |
73 | OutputParameterBlock\r | |
74 | );\r | |
75 | }\r | |
76 | \r | |
77 | /**\r | |
78 | This service requests use TPM2.\r | |
79 | \r | |
80 | @retval EFI_SUCCESS Get the control of TPM2 chip.\r | |
81 | @retval EFI_NOT_FOUND TPM2 not found.\r | |
82 | @retval EFI_DEVICE_ERROR Unexpected device behavior.\r | |
83 | **/\r | |
84 | EFI_STATUS\r | |
85 | EFIAPI\r | |
86 | Tpm2RequestUseTpm (\r | |
87 | VOID\r | |
88 | )\r | |
89 | {\r | |
90 | TPM2_DEVICE_INTERFACE *Tpm2DeviceInterface;\r | |
91 | \r | |
92 | Tpm2DeviceInterface = InternalGetTpm2DeviceInterface ();\r | |
93 | if (Tpm2DeviceInterface == NULL) {\r | |
94 | return EFI_UNSUPPORTED;\r | |
95 | }\r | |
96 | return Tpm2DeviceInterface->Tpm2RequestUseTpm ();\r | |
97 | }\r | |
98 | \r | |
99 | /**\r | |
100 | This service register TPM2 device.\r | |
101 | \r | |
102 | @param Tpm2Device TPM2 device\r | |
103 | \r | |
104 | @retval EFI_SUCCESS This TPM2 device is registered successfully.\r | |
105 | @retval EFI_UNSUPPORTED System does not support register this TPM2 device.\r | |
106 | @retval EFI_ALREADY_STARTED System already register this TPM2 device.\r | |
107 | **/\r | |
108 | EFI_STATUS\r | |
109 | EFIAPI\r | |
110 | Tpm2RegisterTpm2DeviceLib (\r | |
111 | IN TPM2_DEVICE_INTERFACE *Tpm2Device\r | |
112 | )\r | |
113 | {\r | |
114 | TPM2_DEVICE_INTERFACE *Tpm2DeviceInterface;\r | |
115 | \r | |
116 | if (!CompareGuid (PcdGetPtr(PcdTpmInstanceGuid), &Tpm2Device->ProviderGuid)){\r | |
f0f1a3cb | 117 | DEBUG ((DEBUG_WARN, "WARNING: Tpm2RegisterTpm2DeviceLib - does not support %g registration\n", &Tpm2Device->ProviderGuid));\r |
c1d93242 JY |
118 | return EFI_UNSUPPORTED;\r |
119 | }\r | |
120 | \r | |
121 | Tpm2DeviceInterface = InternalGetTpm2DeviceInterface ();\r | |
122 | if (Tpm2DeviceInterface != NULL) {\r | |
123 | //\r | |
124 | // In PEI phase, there will be shadow driver dispatched again.\r | |
125 | //\r | |
33985e3b | 126 | DEBUG ((EFI_D_INFO, "Tpm2RegisterTpm2DeviceLib - Override\n"));\r |
c1d93242 JY |
127 | CopyMem (Tpm2DeviceInterface, Tpm2Device, sizeof(*Tpm2Device));\r |
128 | return EFI_SUCCESS;\r | |
129 | } else {\r | |
130 | Tpm2Device = BuildGuidDataHob (&mInternalTpm2DeviceInterfaceGuid, Tpm2Device, sizeof(*Tpm2Device));\r | |
131 | if (Tpm2Device != NULL) {\r | |
132 | return EFI_SUCCESS;\r | |
133 | } else {\r | |
134 | return EFI_OUT_OF_RESOURCES;\r | |
135 | }\r | |
136 | }\r | |
137 | }\r |