1 /** @file
2 Implement TPM1.2 Startup related command.
3
4 Copyright (c) 2013, Intel Corporation. All rights reserved. <BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
9
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13 **/
14
15 #include <Uefi.h>
16 #include <IndustryStandard/Tpm12.h>
17 #include <Library/BaseMemoryLib.h>
18 #include <Library/BaseLib.h>
19 #include <Library/Tpm12DeviceLib.h>
20
21 #pragma pack(1)
22
23 typedef struct {
24 TPM_RQU_COMMAND_HDR Hdr;
25 TPM_STARTUP_TYPE TpmSt;
26 } TPM_CMD_START_UP;
27
28 typedef struct {
29 TPM_RSP_COMMAND_HDR Hdr;
30 } TPM_RSP_START_UP;
31
32 typedef struct {
33 TPM_RQU_COMMAND_HDR Hdr;
34 } TPM_CMD_SAVE_STATE;
35
36 typedef struct {
37 TPM_RSP_COMMAND_HDR Hdr;
38 } TPM_RSP_SAVE_STATE;
39
40 #pragma pack()
41
42 /**
43 Send Startup command to TPM1.2.
44
45 @param TpmSt Startup Type.
46
47 @retval EFI_SUCCESS Operation completed successfully.
48 @retval EFI_DEVICE_ERROR Unexpected device behavior.
49 **/
50 EFI_STATUS
51 EFIAPI
Tpm12Startup(IN TPM_STARTUP_TYPE TpmSt)52 Tpm12Startup (
53 IN TPM_STARTUP_TYPE TpmSt
54 )
55 {
56 EFI_STATUS Status;
57 UINT32 TpmRecvSize;
58 UINT32 TpmSendSize;
59 TPM_CMD_START_UP SendBuffer;
60 TPM_RSP_START_UP RecvBuffer;
61 UINT32 ReturnCode;
62
63 //
64 // send Tpm command TPM_ORD_Startup
65 //
66 TpmRecvSize = sizeof (TPM_RSP_START_UP);
67 TpmSendSize = sizeof (TPM_CMD_START_UP);
68 SendBuffer.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND);
69 SendBuffer.Hdr.paramSize = SwapBytes32 (TpmSendSize);
70 SendBuffer.Hdr.ordinal = SwapBytes32 (TPM_ORD_Startup);
71 SendBuffer.TpmSt = SwapBytes16 (TpmSt);
72
73 Status = Tpm12SubmitCommand (TpmSendSize, (UINT8 *)&SendBuffer, &TpmRecvSize, (UINT8 *)&RecvBuffer);
74 if (EFI_ERROR (Status)) {
75 return Status;
76 }
77 ReturnCode = SwapBytes32(RecvBuffer.Hdr.returnCode);
78 switch (ReturnCode) {
79 case TPM_SUCCESS:
80 case TPM_INVALID_POSTINIT:
81 // In warm reset, TPM may response TPM_INVALID_POSTINIT
82 return EFI_SUCCESS;
83 default:
84 return EFI_DEVICE_ERROR;
85 }
86 }
87
88 /**
89 Send SaveState command to TPM1.2.
90
91 @retval EFI_SUCCESS Operation completed successfully.
92 @retval EFI_DEVICE_ERROR Unexpected device behavior.
93 **/
94 EFI_STATUS
95 EFIAPI
Tpm12SaveState(VOID)96 Tpm12SaveState (
97 VOID
98 )
99 {
100 EFI_STATUS Status;
101 UINT32 TpmRecvSize;
102 UINT32 TpmSendSize;
103 TPM_CMD_SAVE_STATE SendBuffer;
104 TPM_RSP_SAVE_STATE RecvBuffer;
105 UINT32 ReturnCode;
106
107 //
108 // send Tpm command TPM_ORD_SaveState
109 //
110 TpmRecvSize = sizeof (TPM_RSP_SAVE_STATE);
111 TpmSendSize = sizeof (TPM_CMD_SAVE_STATE);
112 SendBuffer.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND);
113 SendBuffer.Hdr.paramSize = SwapBytes32 (TpmSendSize);
114 SendBuffer.Hdr.ordinal = SwapBytes32 (TPM_ORD_SaveState);
115
116 Status = Tpm12SubmitCommand (TpmSendSize, (UINT8 *)&SendBuffer, &TpmRecvSize, (UINT8 *)&RecvBuffer);
117 if (EFI_ERROR (Status)) {
118 return Status;
119 }
120 ReturnCode = SwapBytes32(RecvBuffer.Hdr.returnCode);
121 switch (ReturnCode) {
122 case TPM_SUCCESS:
123 return EFI_SUCCESS;
124 default:
125 return EFI_DEVICE_ERROR;
126 }
127 }
128