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1 | /*++\r | |
2 | \r | |
3 | Copyright (c) 2006 - 2007, Intel Corporation\r | |
4 | All rights reserved. This program and the accompanying materials\r | |
5 | are licensed and made available under the terms and conditions of the BSD License\r | |
6 | which accompanies this distribution. The full text of the license may be found at\r | |
7 | http://opensource.org/licenses/bsd-license.php\r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | BdsConnect.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | BDS Lib functions which relate with connect the device\r | |
19 | \r | |
20 | --*/\r | |
21 | \r | |
22 | //\r | |
23 | // Include common header file for this module.\r | |
24 | //\r | |
25 | #include "CommonHeader.h"\r | |
26 | \r | |
27 | VOID\r | |
28 | BdsLibConnectAll (\r | |
29 | VOID\r | |
30 | )\r | |
31 | /*++\r | |
32 | \r | |
33 | Routine Description:\r | |
34 | \r | |
35 | This function will connect all the system driver to controller\r | |
36 | first, and then special connect the default console, this make\r | |
37 | sure all the system controller avialbe and the platform default\r | |
38 | console connected.\r | |
39 | \r | |
40 | Arguments:\r | |
41 | \r | |
42 | None\r | |
43 | \r | |
44 | Returns:\r | |
45 | \r | |
46 | None\r | |
47 | \r | |
48 | --*/\r | |
49 | {\r | |
50 | //\r | |
51 | // Connect the platform console first\r | |
52 | //\r | |
53 | BdsLibConnectAllDefaultConsoles ();\r | |
54 | \r | |
55 | //\r | |
56 | // Generic way to connect all the drivers\r | |
57 | //\r | |
58 | BdsLibConnectAllDriversToAllControllers ();\r | |
59 | \r | |
60 | //\r | |
61 | // Here we have the assumption that we have already had\r | |
62 | // platform default console\r | |
63 | //\r | |
64 | BdsLibConnectAllDefaultConsoles ();\r | |
65 | }\r | |
66 | \r | |
67 | VOID\r | |
68 | BdsLibGenericConnectAll (\r | |
69 | VOID\r | |
70 | )\r | |
71 | /*++\r | |
72 | \r | |
73 | Routine Description:\r | |
74 | \r | |
75 | This function will connect all the system drivers to all controllers\r | |
76 | first, and then connect all the console devices the system current\r | |
77 | have. After this we should get all the device work and console avariable\r | |
78 | if the system have console device.\r | |
79 | \r | |
80 | Arguments:\r | |
81 | \r | |
82 | None\r | |
83 | \r | |
84 | Returns:\r | |
85 | \r | |
86 | None\r | |
87 | \r | |
88 | --*/\r | |
89 | {\r | |
90 | //\r | |
91 | // Most generic way to connect all the drivers\r | |
92 | //\r | |
93 | BdsLibConnectAllDriversToAllControllers ();\r | |
94 | BdsLibConnectAllConsoles ();\r | |
95 | }\r | |
96 | \r | |
97 | EFI_STATUS\r | |
98 | BdsLibConnectDevicePath (\r | |
99 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePathToConnect\r | |
100 | )\r | |
101 | /*++\r | |
102 | \r | |
103 | Routine Description:\r | |
104 | This function will create all handles associate with every device\r | |
105 | path node. If the handle associate with one device path node can not\r | |
106 | be created success, then still give one chance to do the dispatch,\r | |
107 | which load the missing drivers if possible.\r | |
108 | \r | |
109 | Arguments:\r | |
110 | \r | |
111 | DevicePathToConnect - The device path which will be connected, it can\r | |
112 | be a multi-instance device path\r | |
113 | \r | |
114 | Returns:\r | |
115 | \r | |
116 | EFI_SUCCESS - All handles associate with every device path\r | |
117 | node have been created\r | |
118 | \r | |
119 | EFI_OUT_OF_RESOURCES - There is no resource to create new handles\r | |
120 | \r | |
121 | EFI_NOT_FOUND - Create the handle associate with one device\r | |
122 | path node failed\r | |
123 | \r | |
124 | --*/\r | |
125 | {\r | |
126 | EFI_STATUS Status;\r | |
127 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r | |
128 | EFI_DEVICE_PATH_PROTOCOL *CopyOfDevicePath;\r | |
129 | EFI_DEVICE_PATH_PROTOCOL *Instance;\r | |
130 | EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath;\r | |
131 | EFI_DEVICE_PATH_PROTOCOL *Next;\r | |
132 | EFI_HANDLE Handle;\r | |
133 | EFI_HANDLE PreviousHandle;\r | |
134 | UINTN Size;\r | |
135 | \r | |
136 | if (DevicePathToConnect == NULL) {\r | |
137 | return EFI_SUCCESS;\r | |
138 | }\r | |
139 | \r | |
140 | DevicePath = DuplicateDevicePath (DevicePathToConnect);\r | |
141 | CopyOfDevicePath = DevicePath;\r | |
142 | if (DevicePath == NULL) {\r | |
143 | return EFI_OUT_OF_RESOURCES;\r | |
144 | }\r | |
145 | \r | |
146 | do {\r | |
147 | //\r | |
148 | // The outer loop handles multi instance device paths.\r | |
149 | // Only console variables contain multiple instance device paths.\r | |
150 | //\r | |
151 | // After this call DevicePath points to the next Instance\r | |
152 | //\r | |
153 | Instance = GetNextDevicePathInstance (&DevicePath, &Size);\r | |
154 | Next = Instance;\r | |
155 | while (!IsDevicePathEndType (Next)) {\r | |
156 | Next = NextDevicePathNode (Next);\r | |
157 | }\r | |
158 | \r | |
159 | SetDevicePathEndNode (Next);\r | |
160 | \r | |
161 | //\r | |
162 | // Start the real work of connect with RemainingDevicePath\r | |
163 | //\r | |
164 | PreviousHandle = NULL;\r | |
165 | do {\r | |
166 | //\r | |
167 | // Find the handle that best matches the Device Path. If it is only a\r | |
168 | // partial match the remaining part of the device path is returned in\r | |
169 | // RemainingDevicePath.\r | |
170 | //\r | |
171 | RemainingDevicePath = Instance;\r | |
172 | Status = gBS->LocateDevicePath (&gEfiDevicePathProtocolGuid, &RemainingDevicePath, &Handle);\r | |
173 | \r | |
174 | if (!EFI_ERROR (Status)) {\r | |
175 | if (Handle == PreviousHandle) {\r | |
176 | //\r | |
177 | // If no forward progress is made try invoking the Dispatcher.\r | |
178 | // A new FV may have been added to the system an new drivers\r | |
179 | // may now be found.\r | |
180 | // Status == EFI_SUCCESS means a driver was dispatched\r | |
181 | // Status == EFI_NOT_FOUND means no new drivers were dispatched\r | |
182 | //\r | |
183 | Status = gDS->Dispatch ();\r | |
184 | }\r | |
185 | \r | |
186 | if (!EFI_ERROR (Status)) {\r | |
187 | PreviousHandle = Handle;\r | |
188 | //\r | |
189 | // Connect all drivers that apply to Handle and RemainingDevicePath,\r | |
190 | // the Recursive flag is FALSE so only one level will be expanded.\r | |
191 | //\r | |
192 | // Do not check the connect status here, if the connect controller fail,\r | |
193 | // then still give the chance to do dispatch, because partial\r | |
194 | // RemainingDevicepath may be in the new FV\r | |
195 | //\r | |
196 | // 1. If the connect fail, RemainingDevicepath and handle will not\r | |
197 | // change, so next time will do the dispatch, then dispatch's status\r | |
198 | // will take effect\r | |
199 | // 2. If the connect success, the RemainingDevicepath and handle will\r | |
200 | // change, then avoid the dispatch, we have chance to continue the\r | |
201 | // next connection\r | |
202 | //\r | |
203 | gBS->ConnectController (Handle, NULL, RemainingDevicePath, FALSE);\r | |
204 | }\r | |
205 | }\r | |
206 | //\r | |
207 | // Loop until RemainingDevicePath is an empty device path\r | |
208 | //\r | |
209 | } while (!EFI_ERROR (Status) && !IsDevicePathEnd (RemainingDevicePath));\r | |
210 | \r | |
211 | } while (DevicePath != NULL);\r | |
212 | \r | |
213 | if (CopyOfDevicePath != NULL) {\r | |
214 | FreePool (CopyOfDevicePath);\r | |
215 | }\r | |
216 | //\r | |
217 | // All handle with DevicePath exists in the handle database\r | |
218 | //\r | |
219 | return Status;\r | |
220 | }\r | |
221 | \r | |
222 | EFI_STATUS\r | |
223 | BdsLibConnectAllEfi (\r | |
224 | VOID\r | |
225 | )\r | |
226 | /*++\r | |
227 | \r | |
228 | Routine Description:\r | |
229 | \r | |
230 | This function will connect all current system handles recursively. The\r | |
231 | connection will finish until every handle's child handle created if it have.\r | |
232 | \r | |
233 | Arguments:\r | |
234 | \r | |
235 | None\r | |
236 | \r | |
237 | Returns:\r | |
238 | \r | |
239 | EFI_SUCCESS - All handles and it's child handle have been connected\r | |
240 | \r | |
241 | EFI_STATUS - Return the status of gBS->LocateHandleBuffer().\r | |
242 | \r | |
243 | --*/\r | |
244 | {\r | |
245 | EFI_STATUS Status;\r | |
246 | UINTN HandleCount;\r | |
247 | EFI_HANDLE *HandleBuffer;\r | |
248 | UINTN Index;\r | |
249 | \r | |
250 | Status = gBS->LocateHandleBuffer (\r | |
251 | AllHandles,\r | |
252 | NULL,\r | |
253 | NULL,\r | |
254 | &HandleCount,\r | |
255 | &HandleBuffer\r | |
256 | );\r | |
257 | if (EFI_ERROR (Status)) {\r | |
258 | return Status;\r | |
259 | }\r | |
260 | \r | |
261 | for (Index = 0; Index < HandleCount; Index++) {\r | |
262 | Status = gBS->ConnectController (HandleBuffer[Index], NULL, NULL, TRUE);\r | |
263 | }\r | |
264 | \r | |
265 | FreePool (HandleBuffer);\r | |
266 | \r | |
267 | return EFI_SUCCESS;\r | |
268 | }\r | |
269 | \r | |
270 | EFI_STATUS\r | |
271 | BdsLibDisconnectAllEfi (\r | |
272 | VOID\r | |
273 | )\r | |
274 | /*++\r | |
275 | \r | |
276 | Routine Description:\r | |
277 | \r | |
278 | This function will disconnect all current system handles. The disconnection\r | |
279 | will finish until every handle have been disconnected.\r | |
280 | \r | |
281 | Arguments:\r | |
282 | \r | |
283 | None\r | |
284 | \r | |
285 | Returns:\r | |
286 | \r | |
287 | EFI_SUCCESS - All handles have been disconnected\r | |
288 | \r | |
289 | EFI_STATUS - Return the status of gBS->LocateHandleBuffer().\r | |
290 | \r | |
291 | --*/\r | |
292 | {\r | |
293 | EFI_STATUS Status;\r | |
294 | UINTN HandleCount;\r | |
295 | EFI_HANDLE *HandleBuffer;\r | |
296 | UINTN Index;\r | |
297 | \r | |
298 | //\r | |
299 | // Disconnect all\r | |
300 | //\r | |
301 | Status = gBS->LocateHandleBuffer (\r | |
302 | AllHandles,\r | |
303 | NULL,\r | |
304 | NULL,\r | |
305 | &HandleCount,\r | |
306 | &HandleBuffer\r | |
307 | );\r | |
308 | if (EFI_ERROR (Status)) {\r | |
309 | return Status;\r | |
310 | }\r | |
311 | \r | |
312 | for (Index = 0; Index < HandleCount; Index++) {\r | |
313 | Status = gBS->DisconnectController (HandleBuffer[Index], NULL, NULL);\r | |
314 | }\r | |
315 | \r | |
316 | FreePool (HandleBuffer);\r | |
317 | \r | |
318 | return EFI_SUCCESS;\r | |
319 | }\r | |
320 | \r | |
321 | VOID\r | |
322 | BdsLibConnectAllDriversToAllControllers (\r | |
323 | VOID\r | |
324 | )\r | |
325 | /*++\r | |
326 | \r | |
327 | Routine Description:\r | |
328 | \r | |
329 | Connects all drivers to all controllers.\r | |
330 | This function make sure all the current system driver will manage\r | |
331 | the correspoinding controllers if have. And at the same time, make\r | |
332 | sure all the system controllers have driver to manage it if have.\r | |
333 | \r | |
334 | Arguments:\r | |
335 | \r | |
336 | None\r | |
337 | \r | |
338 | Returns:\r | |
339 | \r | |
340 | None\r | |
341 | \r | |
342 | --*/\r | |
343 | {\r | |
344 | EFI_STATUS Status;\r | |
345 | \r | |
346 | do {\r | |
347 | //\r | |
348 | // Connect All EFI 1.10 drivers following EFI 1.10 algorithm\r | |
349 | //\r | |
350 | BdsLibConnectAllEfi ();\r | |
351 | \r | |
352 | //\r | |
353 | // Check to see if it's possible to dispatch an more DXE drivers.\r | |
354 | // The BdsLibConnectAllEfi () may have made new DXE drivers show up.\r | |
355 | // If anything is Dispatched Status == EFI_SUCCESS and we will try\r | |
356 | // the connect again.\r | |
357 | //\r | |
358 | Status = gDS->Dispatch ();\r | |
359 | \r | |
360 | } while (!EFI_ERROR (Status));\r | |
361 | \r | |
362 | }\r |