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1 | /** @file\r |
2 | This is service binding for Hash driver.\r | |
3 | \r | |
4 | Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials are licensed and made available under\r | |
6 | the terms and conditions of the BSD License that accompanies this distribution.\r | |
7 | 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 "Driver.h"\r | |
16 | \r | |
17 | EFI_SERVICE_BINDING_PROTOCOL mHash2ServiceBindingProtocol = {\r | |
18 | Hash2ServiceBindingCreateChild,\r | |
19 | Hash2ServiceBindingDestroyChild\r | |
20 | };\r | |
21 | \r | |
22 | /**\r | |
23 | Creates a child handle with a set of I/O services.\r | |
24 | \r | |
25 | @param[in] This Protocol instance pointer.\r | |
26 | @param[in, out] ChildHandle Pointer to the handle of the child to create. If\r | |
27 | it is NULL, then a new handle is created. If\r | |
28 | it is not NULL, then the I/O services are added\r | |
29 | to the existing child handle.\r | |
30 | \r | |
31 | @retval EFI_SUCCES The protocol was added to ChildHandle.\r | |
32 | @retval EFI_INVALID_PARAMETER ChildHandle is NULL.\r | |
33 | @retval EFI_OUT_OF_RESOURCES There are not enough resources availabe to\r | |
34 | create the child.\r | |
35 | @retval Others The child handle was not created.\r | |
36 | \r | |
37 | **/\r | |
38 | EFI_STATUS\r | |
39 | EFIAPI\r | |
40 | Hash2ServiceBindingCreateChild (\r | |
41 | IN EFI_SERVICE_BINDING_PROTOCOL *This,\r | |
42 | IN OUT EFI_HANDLE *ChildHandle\r | |
43 | )\r | |
44 | {\r | |
45 | EFI_STATUS Status;\r | |
46 | HASH2_SERVICE_DATA *Hash2ServiceData;\r | |
47 | HASH2_INSTANCE_DATA *Instance;\r | |
48 | EFI_TPL OldTpl;\r | |
49 | \r | |
50 | if ((This == NULL) || (ChildHandle == NULL)) {\r | |
51 | return EFI_INVALID_PARAMETER;\r | |
52 | }\r | |
53 | \r | |
54 | Hash2ServiceData = HASH2_SERVICE_DATA_FROM_THIS (This);\r | |
55 | \r | |
56 | //\r | |
57 | // Allocate buffer for the new instance.\r | |
58 | //\r | |
59 | Instance = AllocateZeroPool (sizeof (HASH2_INSTANCE_DATA));\r | |
60 | if (Instance == NULL) {\r | |
61 | return EFI_OUT_OF_RESOURCES;\r | |
62 | }\r | |
63 | \r | |
64 | //\r | |
65 | // Init the instance data.\r | |
66 | //\r | |
67 | Instance->Signature = HASH2_INSTANCE_DATA_SIGNATURE;\r | |
68 | CopyMem (&Instance->Hash2Protocol, &mHash2Protocol, sizeof (Instance->Hash2Protocol));\r | |
69 | Instance->Hash2ServiceData = Hash2ServiceData;\r | |
70 | \r | |
71 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
72 | ChildHandle,\r | |
73 | &gEfiHash2ProtocolGuid,\r | |
74 | &Instance->Hash2Protocol,\r | |
75 | NULL\r | |
76 | );\r | |
77 | if (EFI_ERROR (Status)) {\r | |
78 | FreePool (Instance);\r | |
79 | return Status;\r | |
80 | }\r | |
81 | \r | |
82 | Instance->Handle = *ChildHandle;\r | |
83 | \r | |
84 | //\r | |
85 | // Add the child instance into ChildrenList.\r | |
86 | //\r | |
87 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r | |
88 | \r | |
89 | InsertTailList (&Hash2ServiceData->ChildrenList, &Instance->InstEntry);\r | |
90 | \r | |
91 | gBS->RestoreTPL (OldTpl);\r | |
92 | \r | |
93 | return Status;\r | |
94 | }\r | |
95 | \r | |
96 | \r | |
97 | /**\r | |
98 | Destroys a child handle with a set of I/O services.\r | |
99 | \r | |
100 | The DestroyChild() function does the opposite of CreateChild(). It removes a\r | |
101 | protocol that was installed by CreateChild() from ChildHandle. If the removed\r | |
102 | protocol is the last protocol on ChildHandle, then ChildHandle is destroyed.\r | |
103 | \r | |
104 | @param[in] This Pointer to the EFI_SERVICE_BINDING_PROTOCOL\r | |
105 | instance.\r | |
106 | @param[in] ChildHandle Handle of the child to destroy.\r | |
107 | \r | |
108 | @retval EFI_SUCCES The protocol was removed from ChildHandle.\r | |
109 | @retval EFI_UNSUPPORTED ChildHandle does not support the protocol that\r | |
110 | is being removed.\r | |
111 | @retval EFI_INVALID_PARAMETER ChildHandle is NULL.\r | |
112 | @retval EFI_ACCESS_DENIED The protocol could not be removed from the\r | |
113 | ChildHandle because its services are being\r | |
114 | used.\r | |
115 | @retval Others The child handle was not destroyed.\r | |
116 | \r | |
117 | **/\r | |
118 | EFI_STATUS\r | |
119 | EFIAPI\r | |
120 | Hash2ServiceBindingDestroyChild (\r | |
121 | IN EFI_SERVICE_BINDING_PROTOCOL *This,\r | |
122 | IN EFI_HANDLE ChildHandle\r | |
123 | )\r | |
124 | {\r | |
125 | EFI_STATUS Status;\r | |
126 | HASH2_SERVICE_DATA *Hash2ServiceData;\r | |
127 | EFI_HASH2_PROTOCOL *Hash2Protocol;\r | |
128 | HASH2_INSTANCE_DATA *Instance;\r | |
129 | EFI_TPL OldTpl;\r | |
130 | LIST_ENTRY *Entry;\r | |
131 | \r | |
132 | if ((This == NULL) || (ChildHandle == NULL)) {\r | |
133 | return EFI_INVALID_PARAMETER;\r | |
134 | }\r | |
135 | \r | |
136 | Hash2ServiceData = HASH2_SERVICE_DATA_FROM_THIS (This);\r | |
137 | \r | |
138 | //\r | |
139 | // Check if this ChildHandle is valid\r | |
140 | //\r | |
141 | Instance = NULL;\r | |
142 | for(Entry = (&Hash2ServiceData->ChildrenList)->ForwardLink; Entry != (&Hash2ServiceData->ChildrenList); Entry = Entry->ForwardLink) {\r | |
143 | Instance = HASH2_INSTANCE_DATA_FROM_LINK (Entry);\r | |
144 | if (Instance->Handle == ChildHandle) {\r | |
145 | break;\r | |
146 | } else {\r | |
147 | Instance = NULL;\r | |
148 | }\r | |
149 | }\r | |
150 | if (Instance == NULL) {\r | |
151 | DEBUG ((EFI_D_ERROR, "Hash2ServiceBindingDestroyChild - Invalid handle\n"));\r | |
152 | return EFI_UNSUPPORTED;\r | |
153 | }\r | |
154 | \r | |
155 | //\r | |
156 | // Get HashProtocol\r | |
157 | //\r | |
158 | Status = gBS->HandleProtocol (\r | |
159 | ChildHandle,\r | |
160 | &gEfiHash2ProtocolGuid,\r | |
161 | (VOID **)&Hash2Protocol\r | |
162 | );\r | |
163 | if (EFI_ERROR (Status)) {\r | |
164 | return Status;\r | |
165 | }\r | |
166 | \r | |
167 | ASSERT (Hash2Protocol == &Instance->Hash2Protocol);\r | |
168 | \r | |
169 | //\r | |
170 | // Uninstall the Hash protocol.\r | |
171 | //\r | |
172 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
173 | ChildHandle,\r | |
174 | &gEfiHash2ProtocolGuid,\r | |
175 | &Instance->Hash2Protocol,\r | |
176 | NULL\r | |
177 | );\r | |
178 | if (EFI_ERROR (Status)) {\r | |
179 | return Status;\r | |
180 | }\r | |
181 | \r | |
182 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r | |
183 | \r | |
184 | //\r | |
185 | // Remove this instance from the ChildrenList.\r | |
186 | //\r | |
187 | RemoveEntryList (&Instance->InstEntry);\r | |
188 | \r | |
189 | gBS->RestoreTPL (OldTpl);\r | |
190 | \r | |
191 | FreePool (Instance);\r | |
192 | \r | |
193 | return Status;\r | |
194 | }\r | |
195 | \r | |
196 | /**\r | |
197 | The entry point for Hash driver which installs the service binding protocol.\r | |
198 | \r | |
199 | @param[in] ImageHandle The image handle of the driver.\r | |
200 | @param[in] SystemTable The system table.\r | |
201 | \r | |
202 | @retval EFI_SUCCES The service binding protocols is successfully installed.\r | |
203 | @retval Others Other errors as indicated.\r | |
204 | \r | |
205 | **/\r | |
206 | EFI_STATUS\r | |
207 | EFIAPI\r | |
208 | Hash2DriverEntryPoint (\r | |
209 | IN EFI_HANDLE ImageHandle,\r | |
210 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
211 | )\r | |
212 | {\r | |
213 | EFI_STATUS Status;\r | |
214 | HASH2_SERVICE_DATA *Hash2ServiceData;\r | |
215 | \r | |
216 | //\r | |
217 | // Initialize the Hash Service Data.\r | |
218 | //\r | |
219 | Hash2ServiceData = AllocateZeroPool (sizeof (HASH2_SERVICE_DATA));\r | |
220 | if (Hash2ServiceData == NULL) {\r | |
221 | return EFI_OUT_OF_RESOURCES;\r | |
222 | }\r | |
223 | \r | |
224 | Hash2ServiceData->Signature = HASH2_SERVICE_DATA_SIGNATURE;\r | |
225 | CopyMem (&Hash2ServiceData->ServiceBinding, &mHash2ServiceBindingProtocol, sizeof (EFI_SERVICE_BINDING_PROTOCOL));\r | |
226 | InitializeListHead (&Hash2ServiceData->ChildrenList);\r | |
227 | \r | |
228 | //\r | |
229 | // Install the HASH Service Binding Protocol\r | |
230 | //\r | |
231 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
232 | &Hash2ServiceData->ServiceHandle,\r | |
233 | &gEfiHash2ServiceBindingProtocolGuid,\r | |
234 | &Hash2ServiceData->ServiceBinding,\r | |
235 | NULL\r | |
236 | );\r | |
237 | if (EFI_ERROR (Status)) {\r | |
238 | FreePool (Hash2ServiceData);\r | |
239 | }\r | |
240 | \r | |
241 | return Status;\r | |
242 | } |