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23c98c94 | 1 | /** @file\r |
6c857d66 | 2 | Support functions for UEFI protocol notification infrastructure.\r |
28a00297 | 3 | \r |
cd5ebaa0 | 4 | Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r |
82f3edf2 | 5 | (C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>\r |
9d510e61 | 6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
28a00297 | 7 | \r |
504214c4 | 8 | **/\r |
28a00297 | 9 | \r |
9c4ac31c | 10 | #include "DxeMain.h"\r |
ec90508b | 11 | #include "Handle.h"\r |
82f3edf2 | 12 | #include "Event.h"\r |
28a00297 | 13 | \r |
162ed594 | 14 | /**\r |
28a00297 | 15 | Signal event for every protocol in protocol entry.\r |
16 | \r | |
162ed594 | 17 | @param ProtEntry Protocol entry\r |
28a00297 | 18 | \r |
162ed594 | 19 | **/\r |
20 | VOID\r | |
21 | CoreNotifyProtocolEntry (\r | |
1436aea4 | 22 | IN PROTOCOL_ENTRY *ProtEntry\r |
162ed594 | 23 | )\r |
28a00297 | 24 | {\r |
1436aea4 MK |
25 | PROTOCOL_NOTIFY *ProtNotify;\r |
26 | LIST_ENTRY *Link;\r | |
28a00297 | 27 | \r |
28 | ASSERT_LOCKED (&gProtocolDatabaseLock);\r | |
29 | \r | |
1436aea4 MK |
30 | for (Link = ProtEntry->Notify.ForwardLink; Link != &ProtEntry->Notify; Link = Link->ForwardLink) {\r |
31 | ProtNotify = CR (Link, PROTOCOL_NOTIFY, Link, PROTOCOL_NOTIFY_SIGNATURE);\r | |
28a00297 | 32 | CoreSignalEvent (ProtNotify->Event);\r |
33 | }\r | |
34 | }\r | |
35 | \r | |
162ed594 | 36 | /**\r |
37 | Removes Protocol from the protocol list (but not the handle list).\r | |
38 | \r | |
022c6d45 | 39 | @param Handle The handle to remove protocol on.\r |
40 | @param Protocol GUID of the protocol to be moved\r | |
41 | @param Interface The interface of the protocol\r | |
162ed594 | 42 | \r |
43 | @return Protocol Entry\r | |
44 | \r | |
45 | **/\r | |
28a00297 | 46 | PROTOCOL_INTERFACE *\r |
47 | CoreRemoveInterfaceFromProtocol (\r | |
1436aea4 MK |
48 | IN IHANDLE *Handle,\r |
49 | IN EFI_GUID *Protocol,\r | |
50 | IN VOID *Interface\r | |
28a00297 | 51 | )\r |
28a00297 | 52 | {\r |
53 | PROTOCOL_INTERFACE *Prot;\r | |
54 | PROTOCOL_NOTIFY *ProtNotify;\r | |
55 | PROTOCOL_ENTRY *ProtEntry;\r | |
56 | LIST_ENTRY *Link;\r | |
57 | \r | |
58 | ASSERT_LOCKED (&gProtocolDatabaseLock);\r | |
59 | \r | |
60 | Prot = CoreFindProtocolInterface (Handle, Protocol, Interface);\r | |
61 | if (Prot != NULL) {\r | |
28a00297 | 62 | ProtEntry = Prot->Protocol;\r |
63 | \r | |
64 | //\r | |
65 | // If there's a protocol notify location pointing to this entry, back it up one\r | |
66 | //\r | |
1436aea4 MK |
67 | for (Link = ProtEntry->Notify.ForwardLink; Link != &ProtEntry->Notify; Link = Link->ForwardLink) {\r |
68 | ProtNotify = CR (Link, PROTOCOL_NOTIFY, Link, PROTOCOL_NOTIFY_SIGNATURE);\r | |
28a00297 | 69 | \r |
70 | if (ProtNotify->Position == &Prot->ByProtocol) {\r | |
71 | ProtNotify->Position = Prot->ByProtocol.BackLink;\r | |
72 | }\r | |
73 | }\r | |
74 | \r | |
75 | //\r | |
76 | // Remove the protocol interface entry\r | |
77 | //\r | |
28a00297 | 78 | RemoveEntryList (&Prot->ByProtocol);\r |
79 | }\r | |
80 | \r | |
81 | return Prot;\r | |
82 | }\r | |
83 | \r | |
162ed594 | 84 | /**\r |
85 | Add a new protocol notification record for the request protocol.\r | |
86 | \r | |
022c6d45 | 87 | @param Protocol The requested protocol to add the notify\r |
88 | registration\r | |
89 | @param Event The event to signal\r | |
90 | @param Registration Returns the registration record\r | |
162ed594 | 91 | \r |
022c6d45 | 92 | @retval EFI_INVALID_PARAMETER Invalid parameter\r |
93 | @retval EFI_SUCCESS Successfully returned the registration record\r | |
162ed594 | 94 | that has been added\r |
95 | \r | |
96 | **/\r | |
28a00297 | 97 | EFI_STATUS\r |
98 | EFIAPI\r | |
99 | CoreRegisterProtocolNotify (\r | |
1436aea4 MK |
100 | IN EFI_GUID *Protocol,\r |
101 | IN EFI_EVENT Event,\r | |
102 | OUT VOID **Registration\r | |
28a00297 | 103 | )\r |
28a00297 | 104 | {\r |
1436aea4 MK |
105 | PROTOCOL_ENTRY *ProtEntry;\r |
106 | PROTOCOL_NOTIFY *ProtNotify;\r | |
107 | EFI_STATUS Status;\r | |
022c6d45 | 108 | \r |
1436aea4 | 109 | if ((Protocol == NULL) || (Event == NULL) || (Registration == NULL)) {\r |
28a00297 | 110 | return EFI_INVALID_PARAMETER;\r |
111 | }\r | |
112 | \r | |
113 | CoreAcquireProtocolLock ();\r | |
114 | \r | |
115 | ProtNotify = NULL;\r | |
022c6d45 | 116 | \r |
28a00297 | 117 | //\r |
118 | // Get the protocol entry to add the notification too\r | |
119 | //\r | |
120 | \r | |
121 | ProtEntry = CoreFindProtocolEntry (Protocol, TRUE);\r | |
122 | if (ProtEntry != NULL) {\r | |
28a00297 | 123 | //\r |
124 | // Allocate a new notification record\r | |
125 | //\r | |
1436aea4 | 126 | ProtNotify = AllocatePool (sizeof (PROTOCOL_NOTIFY));\r |
28a00297 | 127 | if (ProtNotify != NULL) {\r |
82f3edf2 | 128 | ((IEVENT *)Event)->ExFlag |= EVT_EXFLAG_EVENT_PROTOCOL_NOTIFICATION;\r |
1436aea4 MK |
129 | ProtNotify->Signature = PROTOCOL_NOTIFY_SIGNATURE;\r |
130 | ProtNotify->Protocol = ProtEntry;\r | |
131 | ProtNotify->Event = Event;\r | |
28a00297 | 132 | //\r |
133 | // start at the begining\r | |
134 | //\r | |
022c6d45 | 135 | ProtNotify->Position = &ProtEntry->Protocols;\r |
28a00297 | 136 | \r |
137 | InsertTailList (&ProtEntry->Notify, &ProtNotify->Link);\r | |
138 | }\r | |
139 | }\r | |
140 | \r | |
141 | CoreReleaseProtocolLock ();\r | |
142 | \r | |
143 | //\r | |
144 | // Done. If we have a protocol notify entry, then return it.\r | |
145 | // Otherwise, we must have run out of resources trying to add one\r | |
146 | //\r | |
147 | \r | |
148 | Status = EFI_OUT_OF_RESOURCES;\r | |
149 | if (ProtNotify != NULL) {\r | |
150 | *Registration = ProtNotify;\r | |
1436aea4 | 151 | Status = EFI_SUCCESS;\r |
28a00297 | 152 | }\r |
153 | \r | |
154 | return Status;\r | |
155 | }\r | |
156 | \r | |
162ed594 | 157 | /**\r |
158 | Reinstall a protocol interface on a device handle. The OldInterface for Protocol is replaced by the NewInterface.\r | |
159 | \r | |
022c6d45 | 160 | @param UserHandle Handle on which the interface is to be\r |
161 | reinstalled\r | |
162 | @param Protocol The numeric ID of the interface\r | |
163 | @param OldInterface A pointer to the old interface\r | |
164 | @param NewInterface A pointer to the new interface\r | |
162ed594 | 165 | \r |
166 | @retval EFI_SUCCESS The protocol interface was installed\r | |
167 | @retval EFI_NOT_FOUND The OldInterface on the handle was not found\r | |
168 | @retval EFI_INVALID_PARAMETER One of the parameters has an invalid value\r | |
169 | \r | |
170 | **/\r | |
28a00297 | 171 | EFI_STATUS\r |
172 | EFIAPI\r | |
173 | CoreReinstallProtocolInterface (\r | |
1436aea4 MK |
174 | IN EFI_HANDLE UserHandle,\r |
175 | IN EFI_GUID *Protocol,\r | |
176 | IN VOID *OldInterface,\r | |
177 | IN VOID *NewInterface\r | |
28a00297 | 178 | )\r |
28a00297 | 179 | {\r |
1436aea4 MK |
180 | EFI_STATUS Status;\r |
181 | IHANDLE *Handle;\r | |
182 | PROTOCOL_INTERFACE *Prot;\r | |
183 | PROTOCOL_ENTRY *ProtEntry;\r | |
28a00297 | 184 | \r |
28a00297 | 185 | if (Protocol == NULL) {\r |
186 | return EFI_INVALID_PARAMETER;\r | |
187 | }\r | |
188 | \r | |
28a00297 | 189 | //\r |
190 | // Lock the protocol database\r | |
191 | //\r | |
192 | CoreAcquireProtocolLock ();\r | |
193 | \r | |
a7fcab7a HM |
194 | Status = CoreValidateHandle (UserHandle);\r |
195 | if (EFI_ERROR (Status)) {\r | |
196 | goto Done;\r | |
197 | }\r | |
198 | \r | |
1436aea4 | 199 | Handle = (IHANDLE *)UserHandle;\r |
28a00297 | 200 | //\r |
201 | // Check that Protocol exists on UserHandle, and Interface matches the interface in the database\r | |
202 | //\r | |
203 | Prot = CoreFindProtocolInterface (UserHandle, Protocol, OldInterface);\r | |
204 | if (Prot == NULL) {\r | |
6c857d66 | 205 | Status = EFI_NOT_FOUND;\r |
206 | goto Done;\r | |
28a00297 | 207 | }\r |
208 | \r | |
209 | //\r | |
210 | // Attempt to disconnect all drivers that are using the protocol interface that is about to be reinstalled\r | |
211 | //\r | |
212 | Status = CoreDisconnectControllersUsingProtocolInterface (\r | |
213 | UserHandle,\r | |
214 | Prot\r | |
215 | );\r | |
216 | if (EFI_ERROR (Status)) {\r | |
217 | //\r | |
218 | // One or more drivers refused to release, so return the error\r | |
219 | //\r | |
6c857d66 | 220 | goto Done;\r |
28a00297 | 221 | }\r |
222 | \r | |
223 | //\r | |
224 | // Remove the protocol interface from the protocol\r | |
225 | //\r | |
226 | Prot = CoreRemoveInterfaceFromProtocol (Handle, Protocol, OldInterface);\r | |
227 | \r | |
228 | if (Prot == NULL) {\r | |
6c857d66 | 229 | Status = EFI_NOT_FOUND;\r |
230 | goto Done;\r | |
28a00297 | 231 | }\r |
232 | \r | |
233 | ProtEntry = Prot->Protocol;\r | |
234 | \r | |
235 | //\r | |
236 | // Update the interface on the protocol\r | |
237 | //\r | |
238 | Prot->Interface = NewInterface;\r | |
239 | \r | |
240 | //\r | |
241 | // Add this protocol interface to the tail of the\r | |
242 | // protocol entry\r | |
243 | //\r | |
244 | InsertTailList (&ProtEntry->Protocols, &Prot->ByProtocol);\r | |
245 | \r | |
246 | //\r | |
247 | // Update the Key to show that the handle has been created/modified\r | |
248 | //\r | |
249 | gHandleDatabaseKey++;\r | |
250 | Handle->Key = gHandleDatabaseKey;\r | |
251 | \r | |
252 | //\r | |
253 | // Release the lock and connect all drivers to UserHandle\r | |
254 | //\r | |
255 | CoreReleaseProtocolLock ();\r | |
6c857d66 | 256 | //\r |
257 | // Return code is ignored on purpose.\r | |
258 | //\r | |
259 | CoreConnectController (\r | |
260 | UserHandle,\r | |
261 | NULL,\r | |
262 | NULL,\r | |
263 | TRUE\r | |
264 | );\r | |
28a00297 | 265 | CoreAcquireProtocolLock ();\r |
022c6d45 | 266 | \r |
28a00297 | 267 | //\r |
268 | // Notify the notification list for this protocol\r | |
269 | //\r | |
270 | CoreNotifyProtocolEntry (ProtEntry);\r | |
271 | \r | |
6c857d66 | 272 | Status = EFI_SUCCESS;\r |
273 | \r | |
274 | Done:\r | |
fa3c419f | 275 | CoreReleaseProtocolLock ();\r |
276 | \r | |
6c857d66 | 277 | return Status;\r |
28a00297 | 278 | }\r |