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1 | /** @file\r |
2 | Ihis library is TPM12 TCG protocol lib.\r | |
3 | \r | |
4 | Copyright (c) 2013, Intel Corporation. All rights reserved. <BR>\r | |
5 | This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include <Uefi.h>\r | |
16 | #include <Library/BaseLib.h>\r | |
17 | #include <Library/BaseMemoryLib.h>\r | |
18 | #include <Library/DebugLib.h>\r | |
19 | #include <Library/UefiBootServicesTableLib.h>\r | |
20 | #include <Library/Tpm12DeviceLib.h>\r | |
21 | #include <Protocol/TcgService.h>\r | |
22 | #include <IndustryStandard/Tpm12.h>\r | |
23 | \r | |
24 | EFI_TCG_PROTOCOL *mTcgProtocol = NULL; \r | |
25 | \r | |
26 | /**\r | |
27 | This service enables the sending of commands to the TPM12.\r | |
28 | \r | |
29 | @param[in] InputParameterBlockSize Size of the TPM12 input parameter block.\r | |
30 | @param[in] InputParameterBlock Pointer to the TPM12 input parameter block.\r | |
31 | @param[in,out] OutputParameterBlockSize Size of the TPM12 output parameter block.\r | |
32 | @param[in] OutputParameterBlock Pointer to the TPM12 output parameter block.\r | |
33 | \r | |
34 | @retval EFI_SUCCESS The command byte stream was successfully sent to the device and a response was successfully received.\r | |
35 | @retval EFI_DEVICE_ERROR The command was not successfully sent to the device or a response was not successfully received from the device.\r | |
36 | @retval EFI_BUFFER_TOO_SMALL The output parameter block is too small. \r | |
37 | **/\r | |
38 | EFI_STATUS\r | |
39 | EFIAPI\r | |
40 | Tpm12SubmitCommand (\r | |
41 | IN UINT32 InputParameterBlockSize,\r | |
42 | IN UINT8 *InputParameterBlock,\r | |
43 | IN OUT UINT32 *OutputParameterBlockSize,\r | |
44 | IN UINT8 *OutputParameterBlock\r | |
45 | )\r | |
46 | {\r | |
47 | EFI_STATUS Status;\r | |
48 | TPM_RSP_COMMAND_HDR *Header;\r | |
49 | \r | |
50 | if (mTcgProtocol == NULL) {\r | |
51 | Status = gBS->LocateProtocol (&gEfiTcgProtocolGuid, NULL, (VOID **) &mTcgProtocol);\r | |
52 | if (EFI_ERROR (Status)) {\r | |
53 | //\r | |
54 | // TCG protocol is not installed. So, TPM12 is not present.\r | |
55 | //\r | |
56 | DEBUG ((EFI_D_ERROR, "Tpm12SubmitCommand - TCG - %r\n", Status));\r | |
57 | return EFI_NOT_FOUND;\r | |
58 | }\r | |
59 | }\r | |
60 | //\r | |
61 | // Assume when TCG Protocol is ready, RequestUseTpm already done.\r | |
62 | //\r | |
63 | Status = mTcgProtocol->PassThroughToTpm (\r | |
64 | mTcgProtocol,\r | |
65 | InputParameterBlockSize,\r | |
66 | InputParameterBlock,\r | |
67 | *OutputParameterBlockSize,\r | |
68 | OutputParameterBlock\r | |
69 | );\r | |
70 | if (EFI_ERROR (Status)) {\r | |
71 | return Status;\r | |
72 | }\r | |
73 | Header = (TPM_RSP_COMMAND_HDR *)OutputParameterBlock;\r | |
74 | *OutputParameterBlockSize = SwapBytes32 (Header->paramSize);\r | |
75 | \r | |
76 | return EFI_SUCCESS;\r | |
77 | }\r | |
78 | \r | |
79 | /**\r | |
80 | This service requests use TPM12.\r | |
81 | \r | |
82 | @retval EFI_SUCCESS Get the control of TPM12 chip.\r | |
83 | @retval EFI_NOT_FOUND TPM12 not found.\r | |
84 | @retval EFI_DEVICE_ERROR Unexpected device behavior.\r | |
85 | **/\r | |
86 | EFI_STATUS\r | |
87 | EFIAPI\r | |
88 | Tpm12RequestUseTpm (\r | |
89 | VOID\r | |
90 | )\r | |
91 | {\r | |
92 | EFI_STATUS Status;\r | |
93 | \r | |
94 | if (mTcgProtocol == NULL) {\r | |
95 | Status = gBS->LocateProtocol (&gEfiTcgProtocolGuid, NULL, (VOID **) &mTcgProtocol);\r | |
96 | if (EFI_ERROR (Status)) {\r | |
97 | //\r | |
98 | // TCG protocol is not installed. So, TPM12 is not present.\r | |
99 | //\r | |
100 | DEBUG ((EFI_D_ERROR, "Tpm12RequestUseTpm - TCG - %r\n", Status));\r | |
101 | return EFI_NOT_FOUND;\r | |
102 | }\r | |
103 | }\r | |
104 | //\r | |
105 | // Assume when TCG Protocol is ready, RequestUseTpm already done.\r | |
106 | //\r | |
107 | return EFI_SUCCESS;\r | |
108 | }\r |