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724dcbb2 JY |
1 | /** @file\r |
2 | This is service binding for Hash driver.\r | |
3 | \r | |
b3548d32 | 4 | Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>\r |
289b714b | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
724dcbb2 JY |
6 | \r |
7 | **/\r | |
8 | \r | |
9 | #include "Driver.h"\r | |
10 | \r | |
11 | EFI_SERVICE_BINDING_PROTOCOL mHash2ServiceBindingProtocol = {\r | |
12 | Hash2ServiceBindingCreateChild,\r | |
13 | Hash2ServiceBindingDestroyChild\r | |
14 | };\r | |
15 | \r | |
16 | /**\r | |
17 | Creates a child handle with a set of I/O services.\r | |
18 | \r | |
19 | @param[in] This Protocol instance pointer.\r | |
20 | @param[in, out] ChildHandle Pointer to the handle of the child to create. If\r | |
21 | it is NULL, then a new handle is created. If\r | |
22 | it is not NULL, then the I/O services are added\r | |
23 | to the existing child handle.\r | |
24 | \r | |
d6b926e7 | 25 | @retval EFI_SUCCESS The protocol was added to ChildHandle.\r |
724dcbb2 | 26 | @retval EFI_INVALID_PARAMETER ChildHandle is NULL.\r |
7622e594 | 27 | @retval EFI_OUT_OF_RESOURCES There are not enough resources available to\r |
724dcbb2 JY |
28 | create the child.\r |
29 | @retval Others The child handle was not created.\r | |
30 | \r | |
31 | **/\r | |
32 | EFI_STATUS\r | |
33 | EFIAPI\r | |
34 | Hash2ServiceBindingCreateChild (\r | |
35 | IN EFI_SERVICE_BINDING_PROTOCOL *This,\r | |
36 | IN OUT EFI_HANDLE *ChildHandle\r | |
37 | )\r | |
38 | {\r | |
39 | EFI_STATUS Status;\r | |
40 | HASH2_SERVICE_DATA *Hash2ServiceData;\r | |
41 | HASH2_INSTANCE_DATA *Instance;\r | |
42 | EFI_TPL OldTpl;\r | |
43 | \r | |
44 | if ((This == NULL) || (ChildHandle == NULL)) {\r | |
45 | return EFI_INVALID_PARAMETER;\r | |
46 | }\r | |
47 | \r | |
48 | Hash2ServiceData = HASH2_SERVICE_DATA_FROM_THIS (This);\r | |
49 | \r | |
50 | //\r | |
51 | // Allocate buffer for the new instance.\r | |
52 | //\r | |
53 | Instance = AllocateZeroPool (sizeof (HASH2_INSTANCE_DATA));\r | |
54 | if (Instance == NULL) {\r | |
55 | return EFI_OUT_OF_RESOURCES;\r | |
56 | }\r | |
57 | \r | |
58 | //\r | |
59 | // Init the instance data.\r | |
60 | //\r | |
61 | Instance->Signature = HASH2_INSTANCE_DATA_SIGNATURE;\r | |
62 | CopyMem (&Instance->Hash2Protocol, &mHash2Protocol, sizeof (Instance->Hash2Protocol));\r | |
63 | Instance->Hash2ServiceData = Hash2ServiceData;\r | |
64 | \r | |
65 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
66 | ChildHandle,\r | |
67 | &gEfiHash2ProtocolGuid,\r | |
68 | &Instance->Hash2Protocol,\r | |
69 | NULL\r | |
70 | );\r | |
71 | if (EFI_ERROR (Status)) {\r | |
72 | FreePool (Instance);\r | |
73 | return Status;\r | |
74 | }\r | |
75 | \r | |
76 | Instance->Handle = *ChildHandle;\r | |
77 | \r | |
78 | //\r | |
79 | // Add the child instance into ChildrenList.\r | |
80 | //\r | |
81 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r | |
82 | \r | |
83 | InsertTailList (&Hash2ServiceData->ChildrenList, &Instance->InstEntry);\r | |
84 | \r | |
85 | gBS->RestoreTPL (OldTpl);\r | |
86 | \r | |
87 | return Status;\r | |
88 | }\r | |
89 | \r | |
90 | \r | |
91 | /**\r | |
92 | Destroys a child handle with a set of I/O services.\r | |
93 | \r | |
94 | The DestroyChild() function does the opposite of CreateChild(). It removes a\r | |
95 | protocol that was installed by CreateChild() from ChildHandle. If the removed\r | |
96 | protocol is the last protocol on ChildHandle, then ChildHandle is destroyed.\r | |
97 | \r | |
98 | @param[in] This Pointer to the EFI_SERVICE_BINDING_PROTOCOL\r | |
99 | instance.\r | |
100 | @param[in] ChildHandle Handle of the child to destroy.\r | |
101 | \r | |
d6b926e7 | 102 | @retval EFI_SUCCESS The protocol was removed from ChildHandle.\r |
724dcbb2 JY |
103 | @retval EFI_UNSUPPORTED ChildHandle does not support the protocol that\r |
104 | is being removed.\r | |
105 | @retval EFI_INVALID_PARAMETER ChildHandle is NULL.\r | |
106 | @retval EFI_ACCESS_DENIED The protocol could not be removed from the\r | |
107 | ChildHandle because its services are being\r | |
108 | used.\r | |
109 | @retval Others The child handle was not destroyed.\r | |
110 | \r | |
111 | **/\r | |
112 | EFI_STATUS\r | |
113 | EFIAPI\r | |
114 | Hash2ServiceBindingDestroyChild (\r | |
115 | IN EFI_SERVICE_BINDING_PROTOCOL *This,\r | |
116 | IN EFI_HANDLE ChildHandle\r | |
117 | )\r | |
118 | {\r | |
119 | EFI_STATUS Status;\r | |
120 | HASH2_SERVICE_DATA *Hash2ServiceData;\r | |
121 | EFI_HASH2_PROTOCOL *Hash2Protocol;\r | |
122 | HASH2_INSTANCE_DATA *Instance;\r | |
123 | EFI_TPL OldTpl;\r | |
124 | LIST_ENTRY *Entry;\r | |
125 | \r | |
126 | if ((This == NULL) || (ChildHandle == NULL)) {\r | |
127 | return EFI_INVALID_PARAMETER;\r | |
128 | }\r | |
129 | \r | |
130 | Hash2ServiceData = HASH2_SERVICE_DATA_FROM_THIS (This);\r | |
131 | \r | |
132 | //\r | |
133 | // Check if this ChildHandle is valid\r | |
134 | //\r | |
135 | Instance = NULL;\r | |
136 | for(Entry = (&Hash2ServiceData->ChildrenList)->ForwardLink; Entry != (&Hash2ServiceData->ChildrenList); Entry = Entry->ForwardLink) {\r | |
137 | Instance = HASH2_INSTANCE_DATA_FROM_LINK (Entry);\r | |
138 | if (Instance->Handle == ChildHandle) {\r | |
139 | break;\r | |
140 | } else {\r | |
141 | Instance = NULL;\r | |
142 | }\r | |
143 | }\r | |
144 | if (Instance == NULL) {\r | |
145 | DEBUG ((EFI_D_ERROR, "Hash2ServiceBindingDestroyChild - Invalid handle\n"));\r | |
146 | return EFI_UNSUPPORTED;\r | |
147 | }\r | |
148 | \r | |
149 | //\r | |
150 | // Get HashProtocol\r | |
151 | //\r | |
152 | Status = gBS->HandleProtocol (\r | |
153 | ChildHandle,\r | |
154 | &gEfiHash2ProtocolGuid,\r | |
155 | (VOID **)&Hash2Protocol\r | |
156 | );\r | |
157 | if (EFI_ERROR (Status)) {\r | |
158 | return Status;\r | |
159 | }\r | |
160 | \r | |
161 | ASSERT (Hash2Protocol == &Instance->Hash2Protocol);\r | |
162 | \r | |
163 | //\r | |
164 | // Uninstall the Hash protocol.\r | |
165 | //\r | |
166 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
167 | ChildHandle,\r | |
168 | &gEfiHash2ProtocolGuid,\r | |
169 | &Instance->Hash2Protocol,\r | |
170 | NULL\r | |
171 | );\r | |
172 | if (EFI_ERROR (Status)) {\r | |
173 | return Status;\r | |
174 | }\r | |
175 | \r | |
176 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r | |
177 | \r | |
178 | //\r | |
179 | // Remove this instance from the ChildrenList.\r | |
180 | //\r | |
181 | RemoveEntryList (&Instance->InstEntry);\r | |
182 | \r | |
183 | gBS->RestoreTPL (OldTpl);\r | |
184 | \r | |
185 | FreePool (Instance);\r | |
186 | \r | |
187 | return Status;\r | |
188 | }\r | |
189 | \r | |
190 | /**\r | |
191 | The entry point for Hash driver which installs the service binding protocol.\r | |
192 | \r | |
193 | @param[in] ImageHandle The image handle of the driver.\r | |
194 | @param[in] SystemTable The system table.\r | |
195 | \r | |
d6b926e7 | 196 | @retval EFI_SUCCESS The service binding protocols is successfully installed.\r |
724dcbb2 JY |
197 | @retval Others Other errors as indicated.\r |
198 | \r | |
199 | **/\r | |
200 | EFI_STATUS\r | |
201 | EFIAPI\r | |
202 | Hash2DriverEntryPoint (\r | |
203 | IN EFI_HANDLE ImageHandle,\r | |
204 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
205 | )\r | |
206 | {\r | |
207 | EFI_STATUS Status;\r | |
208 | HASH2_SERVICE_DATA *Hash2ServiceData;\r | |
209 | \r | |
210 | //\r | |
211 | // Initialize the Hash Service Data.\r | |
212 | //\r | |
213 | Hash2ServiceData = AllocateZeroPool (sizeof (HASH2_SERVICE_DATA));\r | |
214 | if (Hash2ServiceData == NULL) {\r | |
215 | return EFI_OUT_OF_RESOURCES;\r | |
216 | }\r | |
217 | \r | |
218 | Hash2ServiceData->Signature = HASH2_SERVICE_DATA_SIGNATURE;\r | |
219 | CopyMem (&Hash2ServiceData->ServiceBinding, &mHash2ServiceBindingProtocol, sizeof (EFI_SERVICE_BINDING_PROTOCOL));\r | |
220 | InitializeListHead (&Hash2ServiceData->ChildrenList);\r | |
221 | \r | |
222 | //\r | |
223 | // Install the HASH Service Binding Protocol\r | |
224 | //\r | |
225 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
226 | &Hash2ServiceData->ServiceHandle,\r | |
227 | &gEfiHash2ServiceBindingProtocolGuid,\r | |
228 | &Hash2ServiceData->ServiceBinding,\r | |
229 | NULL\r | |
230 | );\r | |
231 | if (EFI_ERROR (Status)) {\r | |
232 | FreePool (Hash2ServiceData);\r | |
233 | }\r | |
234 | \r | |
235 | return Status;\r | |
b3548d32 | 236 | }\r |