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1 | /*++\r | |
2 | \r | |
3 | Copyright (c) 2006, 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 | DriverSupport.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | EFI Driver Support Protocol\r | |
19 | \r | |
20 | Revision History\r | |
21 | \r | |
22 | --*/\r | |
23 | \r | |
24 | #include <DxeMain.h>\r | |
25 | \r | |
26 | \r | |
27 | \r | |
28 | STATIC\r | |
29 | EFI_STATUS\r | |
30 | GetHandleFromDriverBinding (\r | |
31 | IN EFI_DRIVER_BINDING_PROTOCOL *DriverBindingNeed,\r | |
32 | OUT EFI_HANDLE *Handle \r | |
33 | );\r | |
34 | \r | |
35 | \r | |
36 | //\r | |
37 | // Driver Support Function Prototypes\r | |
38 | //\r | |
39 | STATIC\r | |
40 | EFI_STATUS \r | |
41 | CoreConnectSingleController (\r | |
42 | IN EFI_HANDLE ControllerHandle,\r | |
43 | IN EFI_HANDLE *DriverImageHandle OPTIONAL,\r | |
44 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r | |
45 | );\r | |
46 | \r | |
47 | //\r | |
48 | // Driver Support Functions\r | |
49 | //\r | |
50 | \r | |
51 | \r | |
52 | EFI_STATUS \r | |
53 | EFIAPI\r | |
54 | CoreConnectController (\r | |
55 | IN EFI_HANDLE ControllerHandle,\r | |
56 | IN EFI_HANDLE *DriverImageHandle OPTIONAL,\r | |
57 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL,\r | |
58 | IN BOOLEAN Recursive\r | |
59 | )\r | |
60 | /*++\r | |
61 | \r | |
62 | Routine Description:\r | |
63 | \r | |
64 | Connects one or more drivers to a controller.\r | |
65 | \r | |
66 | Arguments:\r | |
67 | \r | |
68 | ControllerHandle - Handle of the controller to be connected.\r | |
69 | \r | |
70 | DriverImageHandle - DriverImageHandle A pointer to an ordered list of driver image handles.\r | |
71 | \r | |
72 | RemainingDevicePath - RemainingDevicePath A pointer to the device path that specifies a child of the\r | |
73 | controller specified by ControllerHandle.\r | |
74 | \r | |
75 | Recursive - Whether the function would be called recursively or not.\r | |
76 | \r | |
77 | Returns:\r | |
78 | \r | |
79 | Status code.\r | |
80 | \r | |
81 | --*/\r | |
82 | {\r | |
83 | EFI_STATUS Status;\r | |
84 | EFI_STATUS ReturnStatus;\r | |
85 | IHANDLE *Handle;\r | |
86 | PROTOCOL_INTERFACE *Prot;\r | |
87 | LIST_ENTRY *Link;\r | |
88 | LIST_ENTRY *ProtLink;\r | |
89 | OPEN_PROTOCOL_DATA *OpenData;\r | |
90 | EFI_DEVICE_PATH_PROTOCOL *AlignedRemainingDevicePath;\r | |
91 | \r | |
92 | //\r | |
93 | // Make sure ControllerHandle is valid\r | |
94 | //\r | |
95 | Status = CoreValidateHandle (ControllerHandle);\r | |
96 | if (EFI_ERROR (Status)) {\r | |
97 | return Status;\r | |
98 | }\r | |
99 | \r | |
100 | Handle = ControllerHandle;\r | |
101 | \r | |
102 | //\r | |
103 | // Connect all drivers to ControllerHandle \r | |
104 | //\r | |
105 | AlignedRemainingDevicePath = NULL;\r | |
106 | if (RemainingDevicePath != NULL) {\r | |
107 | AlignedRemainingDevicePath = CoreDuplicateDevicePath (RemainingDevicePath);\r | |
108 | }\r | |
109 | ReturnStatus = CoreConnectSingleController (\r | |
110 | ControllerHandle,\r | |
111 | DriverImageHandle,\r | |
112 | AlignedRemainingDevicePath\r | |
113 | );\r | |
114 | if (AlignedRemainingDevicePath != NULL) {\r | |
115 | CoreFreePool (AlignedRemainingDevicePath);\r | |
116 | }\r | |
117 | \r | |
118 | //\r | |
119 | // If not recursive, then just return after connecting drivers to ControllerHandle\r | |
120 | //\r | |
121 | if (!Recursive) {\r | |
122 | return ReturnStatus;\r | |
123 | }\r | |
124 | \r | |
125 | //\r | |
126 | // If recursive, then connect all drivers to all of ControllerHandle's children\r | |
127 | //\r | |
128 | CoreAcquireProtocolLock ();\r | |
129 | for (Link = Handle->Protocols.ForwardLink; Link != &Handle->Protocols; Link = Link->ForwardLink) {\r | |
130 | Prot = CR(Link, PROTOCOL_INTERFACE, Link, PROTOCOL_INTERFACE_SIGNATURE);\r | |
131 | for (ProtLink = Prot->OpenList.ForwardLink; \r | |
132 | ProtLink != &Prot->OpenList; \r | |
133 | ProtLink = ProtLink->ForwardLink) {\r | |
134 | OpenData = CR (ProtLink, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);\r | |
135 | if ((OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {\r | |
136 | CoreReleaseProtocolLock ();\r | |
137 | Status = CoreConnectController (\r | |
138 | OpenData->ControllerHandle,\r | |
139 | NULL,\r | |
140 | NULL,\r | |
141 | TRUE\r | |
142 | ); \r | |
143 | CoreAcquireProtocolLock ();\r | |
144 | }\r | |
145 | }\r | |
146 | }\r | |
147 | CoreReleaseProtocolLock ();\r | |
148 | \r | |
149 | return ReturnStatus;\r | |
150 | }\r | |
151 | \r | |
152 | STATIC\r | |
153 | VOID\r | |
154 | AddSortedDriverBindingProtocol (\r | |
155 | IN EFI_HANDLE DriverBindingHandle,\r | |
156 | IN OUT UINTN *NumberOfSortedDriverBindingProtocols, \r | |
157 | IN OUT EFI_DRIVER_BINDING_PROTOCOL **SortedDriverBindingProtocols,\r | |
158 | IN UINTN DriverBindingHandleCount,\r | |
159 | IN OUT EFI_HANDLE *DriverBindingHandleBuffer\r | |
160 | )\r | |
161 | /*++\r | |
162 | \r | |
163 | Routine Description:\r | |
164 | \r | |
165 | Add Driver Binding Protocols from Context Driver Image Handles to sorted \r | |
166 | Driver Binding Protocol list.\r | |
167 | \r | |
168 | Arguments:\r | |
169 | \r | |
170 | DriverBindingHandle - Handle of the driver binding protocol.\r | |
171 | \r | |
172 | NumberOfSortedDriverBindingProtocols - Number Of sorted driver binding protocols\r | |
173 | \r | |
174 | SortedDriverBindingProtocols - The sorted protocol list. \r | |
175 | \r | |
176 | DriverBindingHandleCount - Driver Binding Handle Count.\r | |
177 | \r | |
178 | DriverBindingHandleBuffer - The buffer of driver binding protocol to be modified.\r | |
179 | \r | |
180 | Returns:\r | |
181 | \r | |
182 | None.\r | |
183 | \r | |
184 | --*/\r | |
185 | {\r | |
186 | EFI_STATUS Status;\r | |
187 | EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;\r | |
188 | UINTN Index;\r | |
189 | \r | |
190 | //\r | |
191 | // Make sure the DriverBindingHandle is valid\r | |
192 | //\r | |
193 | Status = CoreValidateHandle (DriverBindingHandle);\r | |
194 | if (EFI_ERROR (Status)) {\r | |
195 | return;\r | |
196 | }\r | |
197 | \r | |
198 | //\r | |
199 | // Retrieve the Driver Binding Protocol from DriverBindingHandle\r | |
200 | //\r | |
201 | Status = CoreHandleProtocol(\r | |
202 | DriverBindingHandle,\r | |
203 | &gEfiDriverBindingProtocolGuid,\r | |
204 | (VOID **)&DriverBinding\r | |
205 | );\r | |
206 | //\r | |
207 | // If DriverBindingHandle does not support the Driver Binding Protocol then return\r | |
208 | //\r | |
209 | if (EFI_ERROR (Status) || DriverBinding == NULL) {\r | |
210 | return;\r | |
211 | }\r | |
212 | \r | |
213 | //\r | |
214 | // See if DriverBinding is already in the sorted list\r | |
215 | //\r | |
216 | for (Index = 0; Index < *NumberOfSortedDriverBindingProtocols; Index++) {\r | |
217 | if (DriverBinding == SortedDriverBindingProtocols[Index]) {\r | |
218 | return;\r | |
219 | }\r | |
220 | }\r | |
221 | \r | |
222 | //\r | |
223 | // Add DriverBinding to the end of the list\r | |
224 | //\r | |
225 | SortedDriverBindingProtocols[*NumberOfSortedDriverBindingProtocols] = DriverBinding;\r | |
226 | *NumberOfSortedDriverBindingProtocols = *NumberOfSortedDriverBindingProtocols + 1;\r | |
227 | \r | |
228 | //\r | |
229 | // Mark the cooresponding handle in DriverBindingHandleBuffer as used\r | |
230 | //\r | |
231 | for (Index = 0; Index < DriverBindingHandleCount; Index++) {\r | |
232 | if (DriverBindingHandleBuffer[Index] == DriverBindingHandle) {\r | |
233 | DriverBindingHandleBuffer[Index] = NULL;\r | |
234 | }\r | |
235 | }\r | |
236 | }\r | |
237 | \r | |
238 | STATIC\r | |
239 | EFI_STATUS \r | |
240 | CoreConnectSingleController (\r | |
241 | IN EFI_HANDLE ControllerHandle,\r | |
242 | IN EFI_HANDLE *ContextDriverImageHandles OPTIONAL,\r | |
243 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL \r | |
244 | )\r | |
245 | /*++\r | |
246 | \r | |
247 | Routine Description:\r | |
248 | \r | |
249 | Connects a controller to a driver.\r | |
250 | \r | |
251 | Arguments:\r | |
252 | \r | |
253 | ControllerHandle - Handle of the controller to be connected.\r | |
254 | ContextDriverImageHandles - DriverImageHandle A pointer to an ordered list of driver image handles.\r | |
255 | RemainingDevicePath - RemainingDevicePath A pointer to the device path that specifies a child \r | |
256 | of the controller specified by ControllerHandle.\r | |
257 | \r | |
258 | Returns:\r | |
259 | \r | |
260 | EFI_SUCCESS - One or more drivers were connected to ControllerHandle.\r | |
261 | EFI_OUT_OF_RESOURCES - No enough system resources to complete the request.\r | |
262 | EFI_NOT_FOUND - No drivers were connected to ControllerHandle.\r | |
263 | \r | |
264 | --*/\r | |
265 | {\r | |
266 | EFI_STATUS Status;\r | |
267 | UINTN Index;\r | |
268 | EFI_HANDLE DriverImageHandle;\r | |
269 | EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL *PlatformDriverOverride;\r | |
270 | EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL *BusSpecificDriverOverride;\r | |
271 | UINTN DriverBindingHandleCount;\r | |
272 | EFI_HANDLE *DriverBindingHandleBuffer;\r | |
273 | EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;\r | |
274 | UINTN NumberOfSortedDriverBindingProtocols;\r | |
275 | EFI_DRIVER_BINDING_PROTOCOL **SortedDriverBindingProtocols;\r | |
276 | UINT32 HighestVersion;\r | |
277 | UINTN HighestIndex;\r | |
278 | UINTN SortIndex;\r | |
279 | BOOLEAN OneStarted;\r | |
280 | BOOLEAN DriverFound;\r | |
281 | EFI_HANDLE DriverBindingHandle;\r | |
282 | \r | |
283 | //\r | |
284 | // DriverBindingHandle is used for performance measurement, initialize it here just in case.\r | |
285 | //\r | |
286 | DriverBindingHandle = NULL;\r | |
287 | //\r | |
288 | // Initialize local variables\r | |
289 | //\r | |
290 | DriverBindingHandleCount = 0;\r | |
291 | DriverBindingHandleBuffer = NULL;\r | |
292 | NumberOfSortedDriverBindingProtocols = 0;\r | |
293 | SortedDriverBindingProtocols = NULL;\r | |
294 | \r | |
295 | //\r | |
296 | // Get list of all Driver Binding Protocol Instances\r | |
297 | //\r | |
298 | Status = CoreLocateHandleBuffer (\r | |
299 | ByProtocol, \r | |
300 | &gEfiDriverBindingProtocolGuid, \r | |
301 | NULL,\r | |
302 | &DriverBindingHandleCount, \r | |
303 | &DriverBindingHandleBuffer\r | |
304 | );\r | |
305 | if (EFI_ERROR (Status) || (DriverBindingHandleCount == 0)) {\r | |
306 | return EFI_NOT_FOUND;\r | |
307 | }\r | |
308 | \r | |
309 | //\r | |
310 | // Allocate a duplicate array for the sorted Driver Binding Protocol Instances\r | |
311 | //\r | |
312 | SortedDriverBindingProtocols = CoreAllocateBootServicesPool (sizeof (VOID *) * DriverBindingHandleCount);\r | |
313 | if (SortedDriverBindingProtocols == NULL) {\r | |
314 | CoreFreePool (DriverBindingHandleBuffer);\r | |
315 | return EFI_OUT_OF_RESOURCES;\r | |
316 | }\r | |
317 | \r | |
318 | //\r | |
319 | // Add Driver Binding Protocols from Context Driver Image Handles first\r | |
320 | //\r | |
321 | if (ContextDriverImageHandles != NULL) {\r | |
322 | for (Index = 0; ContextDriverImageHandles[Index] != NULL; Index++) {\r | |
323 | AddSortedDriverBindingProtocol (\r | |
324 | ContextDriverImageHandles[Index],\r | |
325 | &NumberOfSortedDriverBindingProtocols, \r | |
326 | SortedDriverBindingProtocols,\r | |
327 | DriverBindingHandleCount,\r | |
328 | DriverBindingHandleBuffer\r | |
329 | );\r | |
330 | }\r | |
331 | }\r | |
332 | \r | |
333 | //\r | |
334 | // Add the Platform Driver Override Protocol drivers for ControllerHandle next\r | |
335 | //\r | |
336 | Status = CoreLocateProtocol (\r | |
337 | &gEfiPlatformDriverOverrideProtocolGuid, \r | |
338 | NULL, \r | |
339 | (VOID **)&PlatformDriverOverride\r | |
340 | );\r | |
341 | if (!EFI_ERROR (Status) && (PlatformDriverOverride != NULL)) {\r | |
342 | DriverImageHandle = NULL;\r | |
343 | do {\r | |
344 | Status = PlatformDriverOverride->GetDriver (\r | |
345 | PlatformDriverOverride,\r | |
346 | ControllerHandle,\r | |
347 | &DriverImageHandle\r | |
348 | );\r | |
349 | if (!EFI_ERROR (Status)) {\r | |
350 | AddSortedDriverBindingProtocol (\r | |
351 | DriverImageHandle,\r | |
352 | &NumberOfSortedDriverBindingProtocols, \r | |
353 | SortedDriverBindingProtocols,\r | |
354 | DriverBindingHandleCount,\r | |
355 | DriverBindingHandleBuffer\r | |
356 | );\r | |
357 | }\r | |
358 | } while (!EFI_ERROR (Status));\r | |
359 | }\r | |
360 | \r | |
361 | //\r | |
362 | // Get the Bus Specific Driver Override Protocol instance on the Controller Handle\r | |
363 | //\r | |
364 | Status = CoreHandleProtocol(\r | |
365 | ControllerHandle, \r | |
366 | &gEfiBusSpecificDriverOverrideProtocolGuid, \r | |
367 | (VOID **)&BusSpecificDriverOverride\r | |
368 | );\r | |
369 | if (!EFI_ERROR (Status) && (BusSpecificDriverOverride != NULL)) {\r | |
370 | DriverImageHandle = NULL;\r | |
371 | do {\r | |
372 | Status = BusSpecificDriverOverride->GetDriver (\r | |
373 | BusSpecificDriverOverride,\r | |
374 | &DriverImageHandle\r | |
375 | );\r | |
376 | if (!EFI_ERROR (Status)) {\r | |
377 | AddSortedDriverBindingProtocol (\r | |
378 | DriverImageHandle,\r | |
379 | &NumberOfSortedDriverBindingProtocols, \r | |
380 | SortedDriverBindingProtocols,\r | |
381 | DriverBindingHandleCount,\r | |
382 | DriverBindingHandleBuffer\r | |
383 | );\r | |
384 | }\r | |
385 | } while (!EFI_ERROR (Status));\r | |
386 | }\r | |
387 | \r | |
388 | //\r | |
389 | // Then add all the remaining Driver Binding Protocols\r | |
390 | //\r | |
391 | SortIndex = NumberOfSortedDriverBindingProtocols;\r | |
392 | for (Index = 0; Index < DriverBindingHandleCount; Index++) {\r | |
393 | AddSortedDriverBindingProtocol (\r | |
394 | DriverBindingHandleBuffer[Index],\r | |
395 | &NumberOfSortedDriverBindingProtocols, \r | |
396 | SortedDriverBindingProtocols,\r | |
397 | DriverBindingHandleCount,\r | |
398 | DriverBindingHandleBuffer\r | |
399 | );\r | |
400 | }\r | |
401 | \r | |
402 | //\r | |
403 | // Free the Driver Binding Handle Buffer\r | |
404 | //\r | |
405 | CoreFreePool (DriverBindingHandleBuffer);\r | |
406 | \r | |
407 | //\r | |
408 | // Sort the remaining DriverBinding Protocol based on their Version field from\r | |
409 | // highest to lowest.\r | |
410 | //\r | |
411 | for ( ; SortIndex < NumberOfSortedDriverBindingProtocols; SortIndex++) {\r | |
412 | HighestVersion = SortedDriverBindingProtocols[SortIndex]->Version;\r | |
413 | HighestIndex = SortIndex;\r | |
414 | for (Index = SortIndex + 1; Index < NumberOfSortedDriverBindingProtocols; Index++) {\r | |
415 | if (SortedDriverBindingProtocols[Index]->Version > HighestVersion) {\r | |
416 | HighestVersion = SortedDriverBindingProtocols[Index]->Version;\r | |
417 | HighestIndex = Index;\r | |
418 | }\r | |
419 | }\r | |
420 | if (SortIndex != HighestIndex) {\r | |
421 | DriverBinding = SortedDriverBindingProtocols[SortIndex];\r | |
422 | SortedDriverBindingProtocols[SortIndex] = SortedDriverBindingProtocols[HighestIndex];\r | |
423 | SortedDriverBindingProtocols[HighestIndex] = DriverBinding;\r | |
424 | }\r | |
425 | }\r | |
426 | \r | |
427 | //\r | |
428 | // Loop until no more drivers can be started on ControllerHandle\r | |
429 | //\r | |
430 | OneStarted = FALSE;\r | |
431 | do {\r | |
432 | \r | |
433 | //\r | |
434 | // Loop through the sorted Driver Binding Protocol Instances in order, and see if\r | |
435 | // any of the Driver Binding Protocols support the controller specified by \r | |
436 | // ControllerHandle.\r | |
437 | //\r | |
438 | DriverBinding = NULL;\r | |
439 | DriverFound = FALSE;\r | |
440 | for (Index = 0; (Index < NumberOfSortedDriverBindingProtocols) && !DriverFound; Index++) {\r | |
441 | if (SortedDriverBindingProtocols[Index] != NULL) {\r | |
442 | DriverBinding = SortedDriverBindingProtocols[Index];\r | |
443 | Status = DriverBinding->Supported(\r | |
444 | DriverBinding, \r | |
445 | ControllerHandle,\r | |
446 | RemainingDevicePath\r | |
447 | );\r | |
448 | if (!EFI_ERROR (Status)) {\r | |
449 | SortedDriverBindingProtocols[Index] = NULL;\r | |
450 | DriverFound = TRUE;\r | |
451 | \r | |
452 | //\r | |
453 | // A driver was found that supports ControllerHandle, so attempt to start the driver\r | |
454 | // on ControllerHandle.\r | |
455 | //\r | |
456 | PERF_CODE_BEGIN ();\r | |
457 | GetHandleFromDriverBinding (DriverBinding, &DriverBindingHandle);\r | |
458 | PERF_CODE_END ();\r | |
459 | \r | |
460 | PERF_START (DriverBindingHandle, DRIVERBINDING_START_TOK, NULL, 0);\r | |
461 | Status = DriverBinding->Start (\r | |
462 | DriverBinding, \r | |
463 | ControllerHandle,\r | |
464 | RemainingDevicePath\r | |
465 | );\r | |
466 | PERF_END (DriverBindingHandle, DRIVERBINDING_START_TOK, NULL, 0);\r | |
467 | \r | |
468 | if (!EFI_ERROR (Status)) {\r | |
469 | //\r | |
470 | // The driver was successfully started on ControllerHandle, so set a flag\r | |
471 | //\r | |
472 | OneStarted = TRUE;\r | |
473 | }\r | |
474 | }\r | |
475 | }\r | |
476 | }\r | |
477 | } while (DriverFound);\r | |
478 | \r | |
479 | //\r | |
480 | // Free any buffers that were allocated with AllocatePool()\r | |
481 | //\r | |
482 | CoreFreePool (SortedDriverBindingProtocols);\r | |
483 | \r | |
484 | //\r | |
485 | // If at least one driver was started on ControllerHandle, then return EFI_SUCCESS.\r | |
486 | //\r | |
487 | if (OneStarted) {\r | |
488 | return EFI_SUCCESS;\r | |
489 | } \r | |
490 | \r | |
491 | //\r | |
492 | // If no drivers started and RemainingDevicePath is an End Device Path Node, then return EFI_SUCCESS\r | |
493 | //\r | |
494 | if (RemainingDevicePath != NULL) {\r | |
495 | if (IsDevicePathEnd (RemainingDevicePath)) {\r | |
496 | return EFI_SUCCESS;\r | |
497 | }\r | |
498 | } \r | |
499 | \r | |
500 | //\r | |
501 | // Otherwise, no drivers were started on ControllerHandle, so return EFI_NOT_FOUND\r | |
502 | //\r | |
503 | return EFI_NOT_FOUND;\r | |
504 | }\r | |
505 | \r | |
506 | \r | |
507 | EFI_STATUS \r | |
508 | EFIAPI\r | |
509 | CoreDisconnectController (\r | |
510 | IN EFI_HANDLE ControllerHandle,\r | |
511 | IN EFI_HANDLE DriverImageHandle OPTIONAL,\r | |
512 | IN EFI_HANDLE ChildHandle OPTIONAL\r | |
513 | )\r | |
514 | /*++\r | |
515 | \r | |
516 | Routine Description:\r | |
517 | \r | |
518 | Disonnects a controller from a driver\r | |
519 | \r | |
520 | Arguments:\r | |
521 | \r | |
522 | ControllerHandle - ControllerHandle The handle of the controller from which driver(s) \r | |
523 | are to be disconnected.\r | |
524 | DriverImageHandle - DriverImageHandle The driver to disconnect from ControllerHandle.\r | |
525 | ChildHandle - ChildHandle The handle of the child to destroy.\r | |
526 | \r | |
527 | Returns:\r | |
528 | \r | |
529 | EFI_SUCCESS - One or more drivers were disconnected from the controller.\r | |
530 | EFI_SUCCESS - On entry, no drivers are managing ControllerHandle.\r | |
531 | EFI_SUCCESS - DriverImageHandle is not NULL, and on entry DriverImageHandle is not managing ControllerHandle.\r | |
532 | EFI_INVALID_PARAMETER - ControllerHandle is not a valid EFI_HANDLE.\r | |
533 | EFI_INVALID_PARAMETER - DriverImageHandle is not NULL, and it is not a valid EFI_HANDLE.\r | |
534 | EFI_INVALID_PARAMETER - ChildHandle is not NULL, and it is not a valid EFI_HANDLE.\r | |
535 | EFI_OUT_OF_RESOURCES - There are not enough resources available to disconnect any drivers from ControllerHandle.\r | |
536 | EFI_DEVICE_ERROR - The controller could not be disconnected because of a device error.\r | |
537 | \r | |
538 | --*/\r | |
539 | {\r | |
540 | EFI_STATUS Status;\r | |
541 | IHANDLE *Handle;\r | |
542 | EFI_HANDLE *DriverImageHandleBuffer;\r | |
543 | EFI_HANDLE *ChildBuffer;\r | |
544 | UINTN Index;\r | |
545 | UINTN HandleIndex;\r | |
546 | UINTN DriverImageHandleCount;\r | |
547 | UINTN ChildrenToStop;\r | |
548 | UINTN ChildBufferCount;\r | |
549 | UINTN StopCount;\r | |
550 | BOOLEAN Duplicate;\r | |
551 | BOOLEAN ChildHandleValid;\r | |
552 | BOOLEAN DriverImageHandleValid;\r | |
553 | LIST_ENTRY *Link;\r | |
554 | LIST_ENTRY *ProtLink;\r | |
555 | OPEN_PROTOCOL_DATA *OpenData;\r | |
556 | PROTOCOL_INTERFACE *Prot;\r | |
557 | EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;\r | |
558 | \r | |
559 | //\r | |
560 | // Make sure ControllerHandle is valid\r | |
561 | //\r | |
562 | Status = CoreValidateHandle (ControllerHandle);\r | |
563 | if (EFI_ERROR (Status)) {\r | |
564 | return Status;\r | |
565 | }\r | |
566 | \r | |
567 | //\r | |
568 | // Make sure ChildHandle is valid if it is not NULL\r | |
569 | //\r | |
570 | if (ChildHandle != NULL) {\r | |
571 | Status = CoreValidateHandle (ChildHandle);\r | |
572 | if (EFI_ERROR (Status)) {\r | |
573 | return Status;\r | |
574 | }\r | |
575 | }\r | |
576 | \r | |
577 | Handle = ControllerHandle;\r | |
578 | \r | |
579 | //\r | |
580 | // Get list of drivers that are currently managing ControllerHandle\r | |
581 | //\r | |
582 | DriverImageHandleBuffer = NULL;\r | |
583 | DriverImageHandleCount = 1; \r | |
584 | \r | |
585 | if (DriverImageHandle == NULL) {\r | |
586 | //\r | |
587 | // Look at each protocol interface for a match\r | |
588 | //\r | |
589 | DriverImageHandleCount = 0;\r | |
590 | \r | |
591 | CoreAcquireProtocolLock ();\r | |
592 | for (Link = Handle->Protocols.ForwardLink; Link != &Handle->Protocols; Link = Link->ForwardLink) {\r | |
593 | Prot = CR(Link, PROTOCOL_INTERFACE, Link, PROTOCOL_INTERFACE_SIGNATURE);\r | |
594 | for (ProtLink = Prot->OpenList.ForwardLink; \r | |
595 | ProtLink != &Prot->OpenList; \r | |
596 | ProtLink = ProtLink->ForwardLink) {\r | |
597 | OpenData = CR (ProtLink, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);\r | |
598 | if ((OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) != 0) {\r | |
599 | DriverImageHandleCount++;\r | |
600 | }\r | |
601 | }\r | |
602 | }\r | |
603 | CoreReleaseProtocolLock ();\r | |
604 | \r | |
605 | //\r | |
606 | // If there are no drivers managing this controller, then return EFI_SUCCESS\r | |
607 | //\r | |
608 | if (DriverImageHandleCount == 0) {\r | |
609 | Status = EFI_SUCCESS;\r | |
610 | goto Done;\r | |
611 | }\r | |
612 | \r | |
613 | DriverImageHandleBuffer = CoreAllocateBootServicesPool (sizeof (EFI_HANDLE) * DriverImageHandleCount);\r | |
614 | if (DriverImageHandleBuffer == NULL) {\r | |
615 | Status = EFI_OUT_OF_RESOURCES;\r | |
616 | goto Done;\r | |
617 | }\r | |
618 | \r | |
619 | DriverImageHandleCount = 0;\r | |
620 | \r | |
621 | CoreAcquireProtocolLock ();\r | |
622 | for (Link = Handle->Protocols.ForwardLink; Link != &Handle->Protocols; Link = Link->ForwardLink) {\r | |
623 | Prot = CR(Link, PROTOCOL_INTERFACE, Link, PROTOCOL_INTERFACE_SIGNATURE);\r | |
624 | for (ProtLink = Prot->OpenList.ForwardLink; \r | |
625 | ProtLink != &Prot->OpenList; \r | |
626 | ProtLink = ProtLink->ForwardLink) {\r | |
627 | OpenData = CR (ProtLink, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);\r | |
628 | if ((OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) != 0) {\r | |
629 | Duplicate = FALSE;\r | |
630 | for (Index = 0; Index< DriverImageHandleCount; Index++) {\r | |
631 | if (DriverImageHandleBuffer[Index] == OpenData->AgentHandle) {\r | |
632 | Duplicate = TRUE;\r | |
633 | break;\r | |
634 | }\r | |
635 | }\r | |
636 | if (!Duplicate) {\r | |
637 | DriverImageHandleBuffer[DriverImageHandleCount] = OpenData->AgentHandle;\r | |
638 | DriverImageHandleCount++;\r | |
639 | }\r | |
640 | }\r | |
641 | }\r | |
642 | }\r | |
643 | CoreReleaseProtocolLock ();\r | |
644 | }\r | |
645 | \r | |
646 | StopCount = 0;\r | |
647 | for (HandleIndex = 0; HandleIndex < DriverImageHandleCount; HandleIndex++) {\r | |
648 | \r | |
649 | if (DriverImageHandleBuffer != NULL) {\r | |
650 | DriverImageHandle = DriverImageHandleBuffer[HandleIndex];\r | |
651 | }\r | |
652 | \r | |
653 | //\r | |
654 | // Get the Driver Binding Protocol of the driver that is managing this controller\r | |
655 | //\r | |
656 | Status = CoreHandleProtocol (\r | |
657 | DriverImageHandle, \r | |
658 | &gEfiDriverBindingProtocolGuid, \r | |
659 | (VOID **)&DriverBinding\r | |
660 | );\r | |
661 | if (EFI_ERROR (Status)) {\r | |
662 | Status = EFI_INVALID_PARAMETER;\r | |
663 | goto Done;\r | |
664 | }\r | |
665 | \r | |
666 | //\r | |
667 | // Look at each protocol interface for a match\r | |
668 | //\r | |
669 | DriverImageHandleValid = FALSE;\r | |
670 | ChildBufferCount = 0;\r | |
671 | \r | |
672 | CoreAcquireProtocolLock ();\r | |
673 | for (Link = Handle->Protocols.ForwardLink; Link != &Handle->Protocols; Link = Link->ForwardLink) {\r | |
674 | Prot = CR(Link, PROTOCOL_INTERFACE, Link, PROTOCOL_INTERFACE_SIGNATURE);\r | |
675 | for (ProtLink = Prot->OpenList.ForwardLink; \r | |
676 | ProtLink != &Prot->OpenList; \r | |
677 | ProtLink = ProtLink->ForwardLink) {\r | |
678 | OpenData = CR (ProtLink, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);\r | |
679 | if (OpenData->AgentHandle == DriverImageHandle) {\r | |
680 | if ((OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {\r | |
681 | ChildBufferCount++;\r | |
682 | } \r | |
683 | if ((OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) != 0) {\r | |
684 | DriverImageHandleValid = TRUE;\r | |
685 | }\r | |
686 | }\r | |
687 | }\r | |
688 | }\r | |
689 | CoreReleaseProtocolLock ();\r | |
690 | \r | |
691 | if (DriverImageHandleValid) {\r | |
692 | ChildHandleValid = FALSE;\r | |
693 | ChildBuffer = NULL;\r | |
694 | if (ChildBufferCount != 0) {\r | |
695 | ChildBuffer = CoreAllocateBootServicesPool (sizeof (EFI_HANDLE) * ChildBufferCount);\r | |
696 | if (ChildBuffer == NULL) {\r | |
697 | Status = EFI_OUT_OF_RESOURCES;\r | |
698 | goto Done;\r | |
699 | }\r | |
700 | \r | |
701 | ChildBufferCount = 0;\r | |
702 | \r | |
703 | CoreAcquireProtocolLock ();\r | |
704 | for (Link = Handle->Protocols.ForwardLink; Link != &Handle->Protocols; Link = Link->ForwardLink) {\r | |
705 | Prot = CR(Link, PROTOCOL_INTERFACE, Link, PROTOCOL_INTERFACE_SIGNATURE);\r | |
706 | for (ProtLink = Prot->OpenList.ForwardLink; \r | |
707 | ProtLink != &Prot->OpenList; \r | |
708 | ProtLink = ProtLink->ForwardLink) {\r | |
709 | OpenData = CR (ProtLink, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);\r | |
710 | if ((OpenData->AgentHandle == DriverImageHandle) &&\r | |
711 | ((OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0)) {\r | |
712 | Duplicate = FALSE;\r | |
713 | for (Index = 0; Index < ChildBufferCount; Index++) {\r | |
714 | if (ChildBuffer[Index] == OpenData->ControllerHandle) {\r | |
715 | Duplicate = TRUE;\r | |
716 | break;\r | |
717 | }\r | |
718 | }\r | |
719 | if (!Duplicate) {\r | |
720 | ChildBuffer[ChildBufferCount] = OpenData->ControllerHandle;\r | |
721 | if (ChildHandle == ChildBuffer[ChildBufferCount]) {\r | |
722 | ChildHandleValid = TRUE;\r | |
723 | }\r | |
724 | ChildBufferCount++;\r | |
725 | }\r | |
726 | }\r | |
727 | }\r | |
728 | }\r | |
729 | CoreReleaseProtocolLock ();\r | |
730 | }\r | |
731 | \r | |
732 | if (ChildHandle == NULL || ChildHandleValid) {\r | |
733 | ChildrenToStop = 0;\r | |
734 | Status = EFI_SUCCESS;\r | |
735 | if (ChildBufferCount > 0) {\r | |
736 | if (ChildHandle != NULL) {\r | |
737 | ChildrenToStop = 1;\r | |
738 | Status = DriverBinding->Stop (DriverBinding, ControllerHandle, ChildrenToStop, &ChildHandle);\r | |
739 | } else {\r | |
740 | ChildrenToStop = ChildBufferCount;\r | |
741 | Status = DriverBinding->Stop (DriverBinding, ControllerHandle, ChildrenToStop, ChildBuffer);\r | |
742 | }\r | |
743 | }\r | |
744 | if (!EFI_ERROR (Status) && ((ChildHandle == NULL) || (ChildBufferCount == ChildrenToStop))) {\r | |
745 | Status = DriverBinding->Stop (DriverBinding, ControllerHandle, 0, NULL);\r | |
746 | }\r | |
747 | if (!EFI_ERROR (Status)) {\r | |
748 | StopCount++;\r | |
749 | }\r | |
750 | }\r | |
751 | \r | |
752 | if (ChildBuffer != NULL) {\r | |
753 | CoreFreePool (ChildBuffer);\r | |
754 | }\r | |
755 | }\r | |
756 | }\r | |
757 | \r | |
758 | if (StopCount > 0) {\r | |
759 | Status = EFI_SUCCESS;\r | |
760 | } else {\r | |
761 | Status = EFI_NOT_FOUND;\r | |
762 | }\r | |
763 | \r | |
764 | Done: \r | |
765 | \r | |
766 | if (DriverImageHandleBuffer != NULL) {\r | |
767 | CoreFreePool (DriverImageHandleBuffer);\r | |
768 | }\r | |
769 | \r | |
770 | return Status;\r | |
771 | }\r | |
772 | \r | |
773 | \r | |
774 | \r | |
775 | STATIC\r | |
776 | EFI_STATUS\r | |
777 | GetHandleFromDriverBinding (\r | |
778 | IN EFI_DRIVER_BINDING_PROTOCOL *DriverBindingNeed,\r | |
779 | OUT EFI_HANDLE *Handle \r | |
780 | )\r | |
781 | /*++\r | |
782 | \r | |
783 | Routine Description:\r | |
784 | \r | |
785 | Locate the driver binding handle which a specified driver binding protocol installed on.\r | |
786 | \r | |
787 | Arguments:\r | |
788 | \r | |
789 | DriverBindingNeed - The specified driver binding protocol.\r | |
790 | \r | |
791 | Handle - The driver binding handle which the protocol installed on.\r | |
792 | \r | |
793 | \r | |
794 | Returns:\r | |
795 | \r | |
796 | EFI_NOT_FOUND - Could not find the handle.\r | |
797 | \r | |
798 | EFI_SUCCESS - Successfully find the associated driver binding handle.\r | |
799 | \r | |
800 | --*/ \r | |
801 | {\r | |
802 | EFI_STATUS Status ;\r | |
803 | EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;\r | |
804 | UINTN DriverBindingHandleCount;\r | |
805 | EFI_HANDLE *DriverBindingHandleBuffer;\r | |
806 | UINTN Index;\r | |
807 | \r | |
808 | DriverBindingHandleCount = 0;\r | |
809 | DriverBindingHandleBuffer = NULL;\r | |
810 | *Handle = NULL_HANDLE;\r | |
811 | Status = CoreLocateHandleBuffer (\r | |
812 | ByProtocol, \r | |
813 | &gEfiDriverBindingProtocolGuid, \r | |
814 | NULL,\r | |
815 | &DriverBindingHandleCount, \r | |
816 | &DriverBindingHandleBuffer\r | |
817 | );\r | |
818 | if (EFI_ERROR (Status) || DriverBindingHandleCount == 0) {\r | |
819 | return EFI_NOT_FOUND;\r | |
820 | }\r | |
821 | \r | |
822 | for (Index = 0 ; Index < DriverBindingHandleCount; Index++ ) {\r | |
823 | Status = CoreOpenProtocol(\r | |
824 | DriverBindingHandleBuffer[Index],\r | |
825 | &gEfiDriverBindingProtocolGuid,\r | |
826 | (VOID **)&DriverBinding,\r | |
827 | gDxeCoreImageHandle,\r | |
828 | NULL,\r | |
829 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
830 | );\r | |
831 | \r | |
832 | if (!EFI_ERROR (Status) && DriverBinding != NULL) {\r | |
833 | \r | |
834 | if ( DriverBinding == DriverBindingNeed ) {\r | |
835 | *Handle = DriverBindingHandleBuffer[Index];\r | |
836 | CoreFreePool (DriverBindingHandleBuffer); \r | |
837 | return EFI_SUCCESS ;\r | |
838 | }\r | |
839 | }\r | |
840 | }\r | |
841 | \r | |
842 | CoreFreePool (DriverBindingHandleBuffer);\r | |
843 | return EFI_NOT_FOUND ;\r | |
844 | }\r | |
845 | \r |