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9060e3ec | 1 | /** @file\r |
2 | Supporting functions implementaion for PCI devices management.\r | |
3 | \r | |
5db417ed | 4 | Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>\r |
cd5ebaa0 | 5 | This program and the accompanying materials\r |
9060e3ec | 6 | are licensed and made available under the terms and conditions of the BSD License\r |
7 | which accompanies this distribution. 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 "PciBus.h"\r | |
16 | \r | |
17 | //\r | |
18 | // This device structure is serviced as a header.\r | |
19 | // Its next field points to the first root bridge device node.\r | |
20 | //\r | |
21 | LIST_ENTRY mPciDevicePool;\r | |
22 | \r | |
050763db RN |
23 | /**\r |
24 | Disable Bus Master Enable bit in all devices in the list.\r | |
25 | \r | |
26 | @param Devices A device list.\r | |
27 | **/\r | |
28 | VOID\r | |
29 | DisableBmeOnTree (\r | |
30 | IN LIST_ENTRY *Devices\r | |
31 | )\r | |
32 | {\r | |
33 | LIST_ENTRY *Link;\r | |
34 | PCI_IO_DEVICE *PciIoDevice;\r | |
35 | UINT16 Command;\r | |
36 | \r | |
37 | for ( Link = GetFirstNode (Devices)\r | |
38 | ; !IsNull (Devices, Link)\r | |
39 | ; Link = GetNextNode (Devices, Link)\r | |
40 | ) {\r | |
41 | PciIoDevice = PCI_IO_DEVICE_FROM_LINK (Link);\r | |
42 | //\r | |
43 | // Turn off all children's Bus Master, if any\r | |
44 | //\r | |
45 | DisableBmeOnTree (&PciIoDevice->ChildList);\r | |
46 | \r | |
47 | //\r | |
48 | // If this is a device that supports BME, disable BME on this device.\r | |
49 | //\r | |
50 | if ((PciIoDevice->Supports & EFI_PCI_IO_ATTRIBUTE_BUS_MASTER) != 0) {\r | |
51 | PCI_READ_COMMAND_REGISTER(PciIoDevice, &Command);\r | |
52 | if ((Command & EFI_PCI_COMMAND_BUS_MASTER) != 0) {\r | |
53 | Command &= ~EFI_PCI_COMMAND_BUS_MASTER;\r | |
54 | PCI_SET_COMMAND_REGISTER (PciIoDevice, Command);\r | |
55 | DEBUG ((\r | |
56 | DEBUG_INFO," %02x %02x %02x %04x\n",\r | |
57 | PciIoDevice->BusNumber, PciIoDevice->DeviceNumber, PciIoDevice->FunctionNumber,\r | |
58 | Command\r | |
59 | ));\r | |
60 | }\r | |
61 | }\r | |
62 | }\r | |
63 | }\r | |
64 | \r | |
65 | /**\r | |
66 | Exit Boot Services Event notification handler.\r | |
67 | \r | |
68 | Disable Bus Master on any that were enabled during BDS.\r | |
69 | \r | |
70 | @param[in] Event Event whose notification function is being invoked.\r | |
71 | @param[in] Context Pointer to the notification function's context.\r | |
72 | \r | |
73 | **/\r | |
74 | VOID\r | |
75 | EFIAPI\r | |
76 | OnExitBootServices (\r | |
77 | IN EFI_EVENT Event,\r | |
78 | IN VOID *Context\r | |
79 | )\r | |
80 | {\r | |
81 | DEBUG ((\r | |
82 | DEBUG_INFO,\r | |
83 | "PciBus: Disable Bus Master of all devices...\n"\r | |
84 | " Bus# Device# Function# NewCommand\n"\r | |
85 | ));\r | |
86 | DisableBmeOnTree(&mPciDevicePool);\r | |
87 | }\r | |
88 | \r | |
9060e3ec | 89 | /**\r |
90 | Initialize the PCI devices pool.\r | |
91 | \r | |
92 | **/\r | |
93 | VOID\r | |
94 | InitializePciDevicePool (\r | |
95 | VOID\r | |
96 | )\r | |
97 | {\r | |
050763db RN |
98 | EFI_EVENT ExitBootServicesEvent;\r |
99 | EFI_STATUS Status;\r | |
100 | \r | |
9060e3ec | 101 | InitializeListHead (&mPciDevicePool);\r |
050763db RN |
102 | \r |
103 | //\r | |
104 | // DisableBME on ExitBootServices should be synchonized with any IOMMU ExitBootServices routine.\r | |
105 | // DisableBME should be run before the IOMMU protections are disabled.\r | |
106 | // One way to do this is to ensure that the IOMMU ExitBootServices callback runs at TPL_CALLBACK.\r | |
107 | //\r | |
108 | Status = gBS->CreateEventEx (\r | |
109 | EVT_NOTIFY_SIGNAL,\r | |
110 | TPL_NOTIFY,\r | |
111 | OnExitBootServices,\r | |
112 | NULL,\r | |
113 | &gEfiEventExitBootServicesGuid,\r | |
114 | &ExitBootServicesEvent\r | |
115 | );\r | |
116 | if (EFI_ERROR (Status)) {\r | |
117 | DEBUG ((DEBUG_ERROR, "PciBus: Unable to hook ExitBootServices event - %r\n", Status));\r | |
118 | }\r | |
9060e3ec | 119 | }\r |
120 | \r | |
121 | /**\r | |
122 | Insert a root bridge into PCI device pool.\r | |
123 | \r | |
124 | @param RootBridge A pointer to the PCI_IO_DEVICE.\r | |
125 | \r | |
126 | **/\r | |
127 | VOID\r | |
128 | InsertRootBridge (\r | |
129 | IN PCI_IO_DEVICE *RootBridge\r | |
130 | )\r | |
131 | {\r | |
132 | InsertTailList (&mPciDevicePool, &(RootBridge->Link));\r | |
133 | }\r | |
134 | \r | |
135 | /**\r | |
136 | This function is used to insert a PCI device node under\r | |
137 | a bridge.\r | |
138 | \r | |
139 | @param Bridge The PCI bridge.\r | |
140 | @param PciDeviceNode The PCI device needs inserting.\r | |
141 | \r | |
142 | **/\r | |
143 | VOID\r | |
144 | InsertPciDevice (\r | |
145 | IN PCI_IO_DEVICE *Bridge,\r | |
146 | IN PCI_IO_DEVICE *PciDeviceNode\r | |
147 | )\r | |
148 | {\r | |
149 | InsertTailList (&Bridge->ChildList, &(PciDeviceNode->Link));\r | |
150 | PciDeviceNode->Parent = Bridge;\r | |
151 | }\r | |
152 | \r | |
153 | /**\r | |
154 | Destroy root bridge and remove it from deivce tree.\r | |
155 | \r | |
156 | @param RootBridge The bridge want to be removed.\r | |
157 | \r | |
158 | **/\r | |
159 | VOID\r | |
160 | DestroyRootBridge (\r | |
161 | IN PCI_IO_DEVICE *RootBridge\r | |
162 | )\r | |
163 | {\r | |
164 | DestroyPciDeviceTree (RootBridge);\r | |
165 | \r | |
166 | FreePciDevice (RootBridge);\r | |
167 | }\r | |
168 | \r | |
169 | /**\r | |
170 | Destroy a pci device node.\r | |
171 | \r | |
172 | All direct or indirect allocated resource for this node will be freed.\r | |
173 | \r | |
174 | @param PciIoDevice A pointer to the PCI_IO_DEVICE to be destoried.\r | |
175 | \r | |
176 | **/\r | |
177 | VOID\r | |
178 | FreePciDevice (\r | |
179 | IN PCI_IO_DEVICE *PciIoDevice\r | |
180 | )\r | |
181 | {\r | |
182 | ASSERT (PciIoDevice != NULL);\r | |
183 | //\r | |
184 | // Assume all children have been removed underneath this device\r | |
185 | //\r | |
186 | if (PciIoDevice->ResourcePaddingDescriptors != NULL) {\r | |
187 | FreePool (PciIoDevice->ResourcePaddingDescriptors);\r | |
188 | }\r | |
189 | \r | |
190 | if (PciIoDevice->DevicePath != NULL) {\r | |
191 | FreePool (PciIoDevice->DevicePath);\r | |
192 | }\r | |
193 | \r | |
194 | FreePool (PciIoDevice);\r | |
195 | }\r | |
196 | \r | |
197 | /**\r | |
198 | Destroy all the pci device node under the bridge.\r | |
199 | Bridge itself is not included.\r | |
200 | \r | |
201 | @param Bridge A pointer to the PCI_IO_DEVICE.\r | |
202 | \r | |
203 | **/\r | |
204 | VOID\r | |
205 | DestroyPciDeviceTree (\r | |
206 | IN PCI_IO_DEVICE *Bridge\r | |
207 | )\r | |
208 | {\r | |
209 | LIST_ENTRY *CurrentLink;\r | |
210 | PCI_IO_DEVICE *Temp;\r | |
211 | \r | |
212 | while (!IsListEmpty (&Bridge->ChildList)) {\r | |
213 | \r | |
214 | CurrentLink = Bridge->ChildList.ForwardLink;\r | |
215 | \r | |
216 | //\r | |
217 | // Remove this node from the linked list\r | |
218 | //\r | |
219 | RemoveEntryList (CurrentLink);\r | |
220 | \r | |
221 | Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
222 | \r | |
223 | if (!IsListEmpty (&Temp->ChildList)) {\r | |
224 | DestroyPciDeviceTree (Temp);\r | |
225 | }\r | |
226 | \r | |
227 | FreePciDevice (Temp);\r | |
228 | }\r | |
229 | }\r | |
230 | \r | |
231 | /**\r | |
232 | Destroy all device nodes under the root bridge\r | |
233 | specified by Controller.\r | |
234 | \r | |
235 | The root bridge itself is also included.\r | |
236 | \r | |
237 | @param Controller Root bridge handle.\r | |
238 | \r | |
239 | @retval EFI_SUCCESS Destory all devcie nodes successfully.\r | |
240 | @retval EFI_NOT_FOUND Cannot find any PCI device under specified\r | |
241 | root bridge.\r | |
242 | \r | |
243 | **/\r | |
244 | EFI_STATUS\r | |
245 | DestroyRootBridgeByHandle (\r | |
246 | IN EFI_HANDLE Controller\r | |
247 | )\r | |
248 | {\r | |
249 | \r | |
250 | LIST_ENTRY *CurrentLink;\r | |
251 | PCI_IO_DEVICE *Temp;\r | |
252 | \r | |
253 | CurrentLink = mPciDevicePool.ForwardLink;\r | |
254 | \r | |
255 | while (CurrentLink != NULL && CurrentLink != &mPciDevicePool) {\r | |
256 | Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
257 | \r | |
258 | if (Temp->Handle == Controller) {\r | |
259 | \r | |
260 | RemoveEntryList (CurrentLink);\r | |
261 | \r | |
262 | DestroyPciDeviceTree (Temp);\r | |
263 | \r | |
264 | FreePciDevice (Temp);\r | |
265 | \r | |
266 | return EFI_SUCCESS;\r | |
267 | }\r | |
268 | \r | |
269 | CurrentLink = CurrentLink->ForwardLink;\r | |
270 | }\r | |
271 | \r | |
272 | return EFI_NOT_FOUND;\r | |
273 | }\r | |
274 | \r | |
275 | /**\r | |
276 | This function registers the PCI IO device.\r | |
277 | \r | |
278 | It creates a handle for this PCI IO device (if the handle does not exist), attaches\r | |
279 | appropriate protocols onto the handle, does necessary initialization, and sets up\r | |
280 | parent/child relationship with its bus controller.\r | |
281 | \r | |
282 | @param Controller An EFI handle for the PCI bus controller.\r | |
283 | @param PciIoDevice A PCI_IO_DEVICE pointer to the PCI IO device to be registered.\r | |
284 | @param Handle A pointer to hold the returned EFI handle for the PCI IO device.\r | |
285 | \r | |
286 | @retval EFI_SUCCESS The PCI device is successfully registered.\r | |
287 | @retval other An error occurred when registering the PCI device.\r | |
288 | \r | |
289 | **/\r | |
290 | EFI_STATUS\r | |
291 | RegisterPciDevice (\r | |
292 | IN EFI_HANDLE Controller,\r | |
293 | IN PCI_IO_DEVICE *PciIoDevice,\r | |
294 | OUT EFI_HANDLE *Handle OPTIONAL\r | |
295 | )\r | |
296 | {\r | |
297 | EFI_STATUS Status;\r | |
298 | VOID *PlatformOpRomBuffer;\r | |
299 | UINTN PlatformOpRomSize;\r | |
300 | UINT8 PciExpressCapRegOffset;\r | |
301 | EFI_PCI_IO_PROTOCOL *PciIo;\r | |
302 | UINT8 Data8;\r | |
483d0d85 | 303 | BOOLEAN HasEfiImage;\r |
9060e3ec | 304 | \r |
305 | //\r | |
306 | // Install the pciio protocol, device path protocol\r | |
307 | //\r | |
308 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
309 | &PciIoDevice->Handle,\r | |
310 | &gEfiDevicePathProtocolGuid,\r | |
311 | PciIoDevice->DevicePath,\r | |
312 | &gEfiPciIoProtocolGuid,\r | |
313 | &PciIoDevice->PciIo,\r | |
314 | NULL\r | |
315 | );\r | |
316 | if (EFI_ERROR (Status)) {\r | |
317 | return Status;\r | |
318 | }\r | |
319 | \r | |
320 | //\r | |
321 | // Detect if PCI Express Device\r | |
322 | //\r | |
323 | PciExpressCapRegOffset = 0;\r | |
324 | Status = LocateCapabilityRegBlock (\r | |
325 | PciIoDevice,\r | |
326 | EFI_PCI_CAPABILITY_ID_PCIEXP,\r | |
327 | &PciExpressCapRegOffset,\r | |
328 | NULL\r | |
329 | );\r | |
330 | if (!EFI_ERROR (Status)) {\r | |
331 | PciIoDevice->IsPciExp = TRUE;\r | |
332 | }\r | |
333 | \r | |
334 | //\r | |
335 | // Force Interrupt line to "Unknown" or "No Connection"\r | |
336 | //\r | |
337 | PciIo = &(PciIoDevice->PciIo);\r | |
338 | Data8 = PCI_INT_LINE_UNKNOWN;\r | |
339 | PciIo->Pci.Write (PciIo, EfiPciIoWidthUint8, 0x3C, 1, &Data8);\r | |
d4048391 | 340 | \r |
9060e3ec | 341 | //\r |
342 | // Process OpRom\r | |
343 | //\r | |
344 | if (!PciIoDevice->AllOpRomProcessed) {\r | |
345 | \r | |
346 | //\r | |
347 | // Get the OpRom provided by platform\r | |
348 | //\r | |
349 | if (gPciPlatformProtocol != NULL) {\r | |
350 | Status = gPciPlatformProtocol->GetPciRom (\r | |
351 | gPciPlatformProtocol,\r | |
352 | PciIoDevice->Handle,\r | |
353 | &PlatformOpRomBuffer,\r | |
354 | &PlatformOpRomSize\r | |
355 | );\r | |
356 | if (!EFI_ERROR (Status)) {\r | |
4ed4e19c | 357 | PciIoDevice->EmbeddedRom = FALSE;\r |
9060e3ec | 358 | PciIoDevice->RomSize = PlatformOpRomSize;\r |
359 | PciIoDevice->PciIo.RomSize = PlatformOpRomSize;\r | |
360 | PciIoDevice->PciIo.RomImage = PlatformOpRomBuffer;\r | |
361 | //\r | |
362 | // For OpROM read from gPciPlatformProtocol:\r | |
363 | // Add the Rom Image to internal database for later PCI light enumeration\r | |
364 | //\r | |
365 | PciRomAddImageMapping (\r | |
366 | NULL,\r | |
367 | PciIoDevice->PciRootBridgeIo->SegmentNumber,\r | |
368 | PciIoDevice->BusNumber,\r | |
369 | PciIoDevice->DeviceNumber,\r | |
370 | PciIoDevice->FunctionNumber,\r | |
221c8fd5 | 371 | PciIoDevice->PciIo.RomImage,\r |
9060e3ec | 372 | PciIoDevice->PciIo.RomSize\r |
373 | );\r | |
374 | }\r | |
375 | } else if (gPciOverrideProtocol != NULL) {\r | |
376 | Status = gPciOverrideProtocol->GetPciRom (\r | |
377 | gPciOverrideProtocol,\r | |
378 | PciIoDevice->Handle,\r | |
379 | &PlatformOpRomBuffer,\r | |
380 | &PlatformOpRomSize\r | |
381 | );\r | |
382 | if (!EFI_ERROR (Status)) {\r | |
4ed4e19c | 383 | PciIoDevice->EmbeddedRom = FALSE;\r |
9060e3ec | 384 | PciIoDevice->RomSize = PlatformOpRomSize;\r |
385 | PciIoDevice->PciIo.RomSize = PlatformOpRomSize;\r | |
386 | PciIoDevice->PciIo.RomImage = PlatformOpRomBuffer;\r | |
387 | //\r | |
388 | // For OpROM read from gPciOverrideProtocol:\r | |
389 | // Add the Rom Image to internal database for later PCI light enumeration\r | |
390 | //\r | |
391 | PciRomAddImageMapping (\r | |
392 | NULL,\r | |
393 | PciIoDevice->PciRootBridgeIo->SegmentNumber,\r | |
394 | PciIoDevice->BusNumber,\r | |
395 | PciIoDevice->DeviceNumber,\r | |
396 | PciIoDevice->FunctionNumber,\r | |
221c8fd5 | 397 | PciIoDevice->PciIo.RomImage,\r |
9060e3ec | 398 | PciIoDevice->PciIo.RomSize\r |
399 | );\r | |
400 | } \r | |
401 | }\r | |
402 | }\r | |
403 | \r | |
483d0d85 RN |
404 | //\r |
405 | // Determine if there are EFI images in the option rom\r | |
406 | //\r | |
407 | HasEfiImage = ContainEfiImage (PciIoDevice->PciIo.RomImage, PciIoDevice->PciIo.RomSize);\r | |
408 | \r | |
409 | if (HasEfiImage) {\r | |
9060e3ec | 410 | Status = gBS->InstallMultipleProtocolInterfaces (\r |
411 | &PciIoDevice->Handle,\r | |
412 | &gEfiLoadFile2ProtocolGuid,\r | |
413 | &PciIoDevice->LoadFile2,\r | |
414 | NULL\r | |
415 | );\r | |
416 | if (EFI_ERROR (Status)) {\r | |
417 | gBS->UninstallMultipleProtocolInterfaces (\r | |
418 | &PciIoDevice->Handle,\r | |
419 | &gEfiDevicePathProtocolGuid,\r | |
420 | PciIoDevice->DevicePath,\r | |
421 | &gEfiPciIoProtocolGuid,\r | |
422 | &PciIoDevice->PciIo,\r | |
423 | NULL\r | |
424 | );\r | |
425 | return Status;\r | |
426 | }\r | |
427 | }\r | |
428 | \r | |
429 | \r | |
430 | if (!PciIoDevice->AllOpRomProcessed) {\r | |
431 | \r | |
432 | PciIoDevice->AllOpRomProcessed = TRUE;\r | |
433 | \r | |
434 | //\r | |
435 | // Dispatch the EFI OpRom for the PCI device.\r | |
436 | // The OpRom is got from platform in the above code\r | |
437 | // or loaded from device in the previous round of bus enumeration\r | |
438 | //\r | |
483d0d85 | 439 | if (HasEfiImage) {\r |
9060e3ec | 440 | ProcessOpRomImage (PciIoDevice);\r |
441 | }\r | |
442 | }\r | |
443 | \r | |
444 | if (PciIoDevice->BusOverride) {\r | |
445 | //\r | |
446 | // Install Bus Specific Driver Override Protocol\r | |
447 | //\r | |
448 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
449 | &PciIoDevice->Handle,\r | |
450 | &gEfiBusSpecificDriverOverrideProtocolGuid,\r | |
451 | &PciIoDevice->PciDriverOverride,\r | |
452 | NULL\r | |
453 | );\r | |
454 | if (EFI_ERROR (Status)) {\r | |
455 | gBS->UninstallMultipleProtocolInterfaces (\r | |
456 | &PciIoDevice->Handle,\r | |
457 | &gEfiDevicePathProtocolGuid,\r | |
458 | PciIoDevice->DevicePath,\r | |
459 | &gEfiPciIoProtocolGuid,\r | |
460 | &PciIoDevice->PciIo,\r | |
461 | NULL\r | |
462 | );\r | |
483d0d85 | 463 | if (HasEfiImage) {\r |
9060e3ec | 464 | gBS->UninstallMultipleProtocolInterfaces (\r |
465 | &PciIoDevice->Handle,\r | |
466 | &gEfiLoadFile2ProtocolGuid,\r | |
467 | &PciIoDevice->LoadFile2,\r | |
468 | NULL\r | |
469 | );\r | |
470 | }\r | |
471 | \r | |
472 | return Status;\r | |
473 | }\r | |
474 | }\r | |
475 | \r | |
476 | Status = gBS->OpenProtocol (\r | |
477 | Controller,\r | |
478 | &gEfiPciRootBridgeIoProtocolGuid,\r | |
479 | (VOID **) &(PciIoDevice->PciRootBridgeIo),\r | |
480 | gPciBusDriverBinding.DriverBindingHandle,\r | |
481 | PciIoDevice->Handle,\r | |
482 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
483 | );\r | |
484 | if (EFI_ERROR (Status)) {\r | |
485 | return Status;\r | |
486 | }\r | |
487 | \r | |
488 | if (Handle != NULL) {\r | |
489 | *Handle = PciIoDevice->Handle;\r | |
490 | }\r | |
491 | \r | |
492 | //\r | |
493 | // Indicate the pci device is registered\r | |
494 | //\r | |
495 | PciIoDevice->Registered = TRUE;\r | |
496 | \r | |
497 | return EFI_SUCCESS;\r | |
498 | }\r | |
499 | \r | |
500 | /**\r | |
501 | This function is used to remove the whole PCI devices on the specified bridge from\r | |
502 | the root bridge.\r | |
503 | \r | |
504 | @param RootBridgeHandle The root bridge device handle.\r | |
505 | @param Bridge The bridge device to be removed.\r | |
506 | \r | |
507 | **/\r | |
508 | VOID\r | |
509 | RemoveAllPciDeviceOnBridge (\r | |
510 | EFI_HANDLE RootBridgeHandle,\r | |
511 | PCI_IO_DEVICE *Bridge\r | |
512 | )\r | |
513 | {\r | |
514 | LIST_ENTRY *CurrentLink;\r | |
515 | PCI_IO_DEVICE *Temp;\r | |
516 | \r | |
517 | while (!IsListEmpty (&Bridge->ChildList)) {\r | |
518 | \r | |
519 | CurrentLink = Bridge->ChildList.ForwardLink;\r | |
520 | Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
521 | \r | |
522 | //\r | |
523 | // Check if the current node has been deregistered before\r | |
524 | // If it is not, then deregister it\r | |
525 | //\r | |
526 | if (Temp->Registered) {\r | |
527 | DeRegisterPciDevice (RootBridgeHandle, Temp->Handle);\r | |
528 | }\r | |
529 | \r | |
530 | //\r | |
531 | // Remove this node from the linked list\r | |
532 | //\r | |
533 | RemoveEntryList (CurrentLink);\r | |
534 | \r | |
535 | if (!IsListEmpty (&Temp->ChildList)) {\r | |
536 | RemoveAllPciDeviceOnBridge (RootBridgeHandle, Temp);\r | |
537 | }\r | |
538 | \r | |
539 | FreePciDevice (Temp);\r | |
540 | }\r | |
541 | }\r | |
542 | \r | |
543 | /**\r | |
544 | This function is used to de-register the PCI IO device.\r | |
545 | \r | |
546 | That includes un-installing PciIo protocol from the specified PCI\r | |
547 | device handle.\r | |
548 | \r | |
549 | @param Controller An EFI handle for the PCI bus controller.\r | |
550 | @param Handle PCI device handle.\r | |
551 | \r | |
552 | @retval EFI_SUCCESS The PCI device is successfully de-registered.\r | |
553 | @retval other An error occurred when de-registering the PCI device.\r | |
554 | \r | |
555 | **/\r | |
556 | EFI_STATUS\r | |
557 | DeRegisterPciDevice (\r | |
558 | IN EFI_HANDLE Controller,\r | |
559 | IN EFI_HANDLE Handle\r | |
560 | )\r | |
561 | \r | |
562 | {\r | |
563 | EFI_PCI_IO_PROTOCOL *PciIo;\r | |
564 | EFI_STATUS Status;\r | |
565 | PCI_IO_DEVICE *PciIoDevice;\r | |
566 | PCI_IO_DEVICE *Node;\r | |
567 | LIST_ENTRY *CurrentLink;\r | |
568 | EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;\r | |
569 | \r | |
570 | Status = gBS->OpenProtocol (\r | |
571 | Handle,\r | |
572 | &gEfiPciIoProtocolGuid,\r | |
573 | (VOID **) &PciIo,\r | |
574 | gPciBusDriverBinding.DriverBindingHandle,\r | |
575 | Controller,\r | |
576 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
577 | );\r | |
578 | if (!EFI_ERROR (Status)) {\r | |
579 | PciIoDevice = PCI_IO_DEVICE_FROM_PCI_IO_THIS (PciIo);\r | |
580 | \r | |
581 | //\r | |
582 | // If it is already de-registered\r | |
583 | //\r | |
584 | if (!PciIoDevice->Registered) {\r | |
585 | return EFI_SUCCESS;\r | |
586 | }\r | |
587 | \r | |
588 | //\r | |
589 | // If it is PPB, first de-register its children\r | |
590 | //\r | |
591 | \r | |
592 | if (!IsListEmpty (&PciIoDevice->ChildList)) {\r | |
593 | \r | |
594 | CurrentLink = PciIoDevice->ChildList.ForwardLink;\r | |
595 | \r | |
596 | while (CurrentLink != NULL && CurrentLink != &PciIoDevice->ChildList) {\r | |
597 | Node = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
598 | Status = DeRegisterPciDevice (Controller, Node->Handle);\r | |
599 | \r | |
600 | if (EFI_ERROR (Status)) {\r | |
601 | return Status;\r | |
602 | }\r | |
603 | \r | |
604 | CurrentLink = CurrentLink->ForwardLink;\r | |
605 | }\r | |
606 | }\r | |
607 | \r | |
608 | //\r | |
609 | // Close the child handle\r | |
610 | //\r | |
611 | Status = gBS->CloseProtocol (\r | |
612 | Controller,\r | |
613 | &gEfiPciRootBridgeIoProtocolGuid,\r | |
614 | gPciBusDriverBinding.DriverBindingHandle,\r | |
615 | Handle\r | |
616 | );\r | |
617 | \r | |
618 | //\r | |
619 | // Un-install the Device Path protocol and PCI I/O protocol\r | |
620 | // and Bus Specific Driver Override protocol if needed.\r | |
621 | //\r | |
622 | if (PciIoDevice->BusOverride) {\r | |
623 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
624 | Handle,\r | |
625 | &gEfiDevicePathProtocolGuid,\r | |
626 | PciIoDevice->DevicePath,\r | |
627 | &gEfiPciIoProtocolGuid,\r | |
628 | &PciIoDevice->PciIo,\r | |
629 | &gEfiBusSpecificDriverOverrideProtocolGuid,\r | |
630 | &PciIoDevice->PciDriverOverride,\r | |
631 | NULL\r | |
632 | );\r | |
633 | } else {\r | |
634 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
635 | Handle,\r | |
636 | &gEfiDevicePathProtocolGuid,\r | |
637 | PciIoDevice->DevicePath,\r | |
638 | &gEfiPciIoProtocolGuid,\r | |
639 | &PciIoDevice->PciIo,\r | |
640 | NULL\r | |
641 | );\r | |
642 | }\r | |
643 | \r | |
644 | if (!EFI_ERROR (Status)) {\r | |
645 | //\r | |
646 | // Try to uninstall LoadFile2 protocol if exists\r | |
647 | //\r | |
648 | Status = gBS->OpenProtocol (\r | |
649 | Handle,\r | |
650 | &gEfiLoadFile2ProtocolGuid,\r | |
651 | NULL,\r | |
652 | gPciBusDriverBinding.DriverBindingHandle,\r | |
653 | Controller,\r | |
654 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r | |
655 | );\r | |
656 | if (!EFI_ERROR (Status)) {\r | |
657 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
658 | Handle,\r | |
659 | &gEfiLoadFile2ProtocolGuid,\r | |
660 | &PciIoDevice->LoadFile2,\r | |
661 | NULL\r | |
662 | );\r | |
663 | }\r | |
664 | //\r | |
665 | // Restore Status\r | |
666 | //\r | |
667 | Status = EFI_SUCCESS;\r | |
668 | }\r | |
669 | \r | |
670 | \r | |
671 | if (EFI_ERROR (Status)) {\r | |
672 | gBS->OpenProtocol (\r | |
673 | Controller,\r | |
674 | &gEfiPciRootBridgeIoProtocolGuid,\r | |
675 | (VOID **) &PciRootBridgeIo,\r | |
676 | gPciBusDriverBinding.DriverBindingHandle,\r | |
677 | Handle,\r | |
678 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
679 | );\r | |
680 | return Status;\r | |
681 | }\r | |
682 | \r | |
683 | //\r | |
684 | // The Device Driver should disable this device after disconnect\r | |
685 | // so the Pci Bus driver will not touch this device any more.\r | |
686 | // Restore the register field to the original value\r | |
687 | //\r | |
688 | PciIoDevice->Registered = FALSE;\r | |
689 | PciIoDevice->Handle = NULL;\r | |
690 | } else {\r | |
691 | \r | |
692 | //\r | |
693 | // Handle may be closed before\r | |
694 | //\r | |
695 | return EFI_SUCCESS;\r | |
696 | }\r | |
697 | \r | |
698 | return EFI_SUCCESS;\r | |
699 | }\r | |
700 | \r | |
701 | /**\r | |
702 | Start to manage the PCI device on the specified root bridge or PCI-PCI Bridge.\r | |
703 | \r | |
704 | @param Controller The root bridge handle.\r | |
705 | @param RootBridge A pointer to the PCI_IO_DEVICE.\r | |
706 | @param RemainingDevicePath A pointer to the EFI_DEVICE_PATH_PROTOCOL.\r | |
707 | @param NumberOfChildren Children number.\r | |
708 | @param ChildHandleBuffer A pointer to the child handle buffer.\r | |
709 | \r | |
710 | @retval EFI_NOT_READY Device is not allocated.\r | |
711 | @retval EFI_UNSUPPORTED Device only support PCI-PCI bridge.\r | |
712 | @retval EFI_NOT_FOUND Can not find the specific device.\r | |
713 | @retval EFI_SUCCESS Success to start Pci devices on bridge.\r | |
714 | \r | |
715 | **/\r | |
716 | EFI_STATUS\r | |
717 | StartPciDevicesOnBridge (\r | |
718 | IN EFI_HANDLE Controller,\r | |
719 | IN PCI_IO_DEVICE *RootBridge,\r | |
720 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath,\r | |
721 | IN OUT UINT8 *NumberOfChildren,\r | |
722 | IN OUT EFI_HANDLE *ChildHandleBuffer\r | |
723 | )\r | |
724 | \r | |
725 | {\r | |
726 | PCI_IO_DEVICE *PciIoDevice;\r | |
727 | EFI_DEV_PATH_PTR Node;\r | |
728 | EFI_DEVICE_PATH_PROTOCOL *CurrentDevicePath;\r | |
729 | EFI_STATUS Status;\r | |
730 | LIST_ENTRY *CurrentLink;\r | |
731 | UINT64 Supports;\r | |
732 | \r | |
733 | PciIoDevice = NULL;\r | |
734 | CurrentLink = RootBridge->ChildList.ForwardLink;\r | |
735 | \r | |
736 | while (CurrentLink != NULL && CurrentLink != &RootBridge->ChildList) {\r | |
737 | \r | |
738 | PciIoDevice = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
739 | if (RemainingDevicePath != NULL) {\r | |
740 | \r | |
741 | Node.DevPath = RemainingDevicePath;\r | |
742 | \r | |
743 | if (Node.Pci->Device != PciIoDevice->DeviceNumber ||\r | |
744 | Node.Pci->Function != PciIoDevice->FunctionNumber) {\r | |
745 | CurrentLink = CurrentLink->ForwardLink;\r | |
746 | continue;\r | |
747 | }\r | |
748 | \r | |
749 | //\r | |
750 | // Check if the device has been assigned with required resource\r | |
751 | //\r | |
752 | if (!PciIoDevice->Allocated) {\r | |
753 | return EFI_NOT_READY;\r | |
754 | }\r | |
755 | \r | |
756 | //\r | |
757 | // Check if the current node has been registered before\r | |
758 | // If it is not, register it\r | |
759 | //\r | |
760 | if (!PciIoDevice->Registered) {\r | |
761 | Status = RegisterPciDevice (\r | |
762 | Controller,\r | |
763 | PciIoDevice,\r | |
764 | NULL\r | |
765 | );\r | |
766 | \r | |
767 | }\r | |
768 | \r | |
769 | if (NumberOfChildren != NULL && ChildHandleBuffer != NULL && PciIoDevice->Registered) {\r | |
770 | ChildHandleBuffer[*NumberOfChildren] = PciIoDevice->Handle;\r | |
771 | (*NumberOfChildren)++;\r | |
772 | }\r | |
773 | \r | |
774 | //\r | |
775 | // Get the next device path\r | |
776 | //\r | |
777 | CurrentDevicePath = NextDevicePathNode (RemainingDevicePath);\r | |
778 | if (IsDevicePathEnd (CurrentDevicePath)) {\r | |
779 | return EFI_SUCCESS;\r | |
780 | }\r | |
781 | \r | |
782 | //\r | |
783 | // If it is a PPB\r | |
784 | //\r | |
13fd0d50 | 785 | if (IS_PCI_BRIDGE (&PciIoDevice->Pci)) {\r |
9060e3ec | 786 | Status = StartPciDevicesOnBridge (\r |
787 | Controller,\r | |
788 | PciIoDevice,\r | |
789 | CurrentDevicePath,\r | |
790 | NumberOfChildren,\r | |
791 | ChildHandleBuffer\r | |
792 | );\r | |
793 | \r | |
794 | PciIoDevice->PciIo.Attributes (\r | |
795 | &(PciIoDevice->PciIo),\r | |
796 | EfiPciIoAttributeOperationSupported,\r | |
797 | 0,\r | |
798 | &Supports\r | |
799 | );\r | |
5db417ed RN |
800 | //\r |
801 | // By default every bridge's IO and MMIO spaces are enabled.\r | |
802 | // Bridge's Bus Master will be enabled when any device behind it requests\r | |
803 | // to enable Bus Master.\r | |
804 | //\r | |
805 | Supports &= (UINT64) (EFI_PCI_IO_ATTRIBUTE_IO | EFI_PCI_IO_ATTRIBUTE_MEMORY);\r | |
9060e3ec | 806 | PciIoDevice->PciIo.Attributes (\r |
807 | &(PciIoDevice->PciIo),\r | |
808 | EfiPciIoAttributeOperationEnable,\r | |
809 | Supports,\r | |
810 | NULL\r | |
811 | );\r | |
812 | \r | |
813 | return Status;\r | |
814 | } else {\r | |
815 | \r | |
816 | //\r | |
817 | // Currently, the PCI bus driver only support PCI-PCI bridge\r | |
818 | //\r | |
819 | return EFI_UNSUPPORTED;\r | |
820 | }\r | |
821 | \r | |
822 | } else {\r | |
823 | \r | |
824 | //\r | |
825 | // If remaining device path is NULL,\r | |
826 | // try to enable all the pci devices under this bridge\r | |
827 | //\r | |
828 | if (!PciIoDevice->Registered && PciIoDevice->Allocated) {\r | |
829 | Status = RegisterPciDevice (\r | |
830 | Controller,\r | |
831 | PciIoDevice,\r | |
832 | NULL\r | |
833 | );\r | |
834 | \r | |
835 | }\r | |
836 | \r | |
837 | if (NumberOfChildren != NULL && ChildHandleBuffer != NULL && PciIoDevice->Registered) {\r | |
838 | ChildHandleBuffer[*NumberOfChildren] = PciIoDevice->Handle;\r | |
839 | (*NumberOfChildren)++;\r | |
840 | }\r | |
841 | \r | |
13fd0d50 | 842 | if (IS_PCI_BRIDGE (&PciIoDevice->Pci)) {\r |
9060e3ec | 843 | Status = StartPciDevicesOnBridge (\r |
844 | Controller,\r | |
845 | PciIoDevice,\r | |
846 | RemainingDevicePath,\r | |
847 | NumberOfChildren,\r | |
848 | ChildHandleBuffer\r | |
849 | );\r | |
850 | \r | |
851 | PciIoDevice->PciIo.Attributes (\r | |
852 | &(PciIoDevice->PciIo),\r | |
853 | EfiPciIoAttributeOperationSupported,\r | |
854 | 0,\r | |
855 | &Supports\r | |
856 | );\r | |
5db417ed RN |
857 | //\r |
858 | // By default every bridge's IO and MMIO spaces are enabled.\r | |
859 | // Bridge's Bus Master will be enabled when any device behind it requests\r | |
860 | // to enable Bus Master.\r | |
861 | //\r | |
862 | Supports &= (UINT64) (EFI_PCI_IO_ATTRIBUTE_IO | EFI_PCI_IO_ATTRIBUTE_MEMORY);\r | |
9060e3ec | 863 | PciIoDevice->PciIo.Attributes (\r |
864 | &(PciIoDevice->PciIo),\r | |
865 | EfiPciIoAttributeOperationEnable,\r | |
866 | Supports,\r | |
867 | NULL\r | |
868 | );\r | |
869 | \r | |
870 | }\r | |
871 | \r | |
872 | CurrentLink = CurrentLink->ForwardLink;\r | |
873 | }\r | |
874 | }\r | |
875 | \r | |
876 | if (PciIoDevice == NULL) {\r | |
877 | return EFI_NOT_FOUND;\r | |
878 | } else {\r | |
879 | return EFI_SUCCESS;\r | |
880 | }\r | |
881 | }\r | |
882 | \r | |
883 | /**\r | |
884 | Start to manage all the PCI devices it found previously under\r | |
885 | the entire host bridge.\r | |
886 | \r | |
887 | @param Controller The root bridge handle.\r | |
888 | \r | |
889 | @retval EFI_NOT_READY Device is not allocated.\r | |
890 | @retval EFI_SUCCESS Success to start Pci device on host bridge.\r | |
891 | \r | |
892 | **/\r | |
893 | EFI_STATUS\r | |
894 | StartPciDevices (\r | |
895 | IN EFI_HANDLE Controller\r | |
896 | )\r | |
897 | {\r | |
898 | PCI_IO_DEVICE *RootBridge;\r | |
899 | EFI_HANDLE ThisHostBridge;\r | |
900 | LIST_ENTRY *CurrentLink;\r | |
901 | \r | |
902 | RootBridge = GetRootBridgeByHandle (Controller);\r | |
903 | ASSERT (RootBridge != NULL);\r | |
904 | ThisHostBridge = RootBridge->PciRootBridgeIo->ParentHandle;\r | |
905 | \r | |
906 | CurrentLink = mPciDevicePool.ForwardLink;\r | |
907 | \r | |
908 | while (CurrentLink != NULL && CurrentLink != &mPciDevicePool) {\r | |
909 | \r | |
910 | RootBridge = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
911 | //\r | |
912 | // Locate the right root bridge to start\r | |
913 | //\r | |
914 | if (RootBridge->PciRootBridgeIo->ParentHandle == ThisHostBridge) {\r | |
915 | StartPciDevicesOnBridge (\r | |
916 | RootBridge->Handle,\r | |
917 | RootBridge,\r | |
918 | NULL,\r | |
919 | NULL,\r | |
920 | NULL\r | |
921 | );\r | |
922 | }\r | |
923 | \r | |
924 | CurrentLink = CurrentLink->ForwardLink;\r | |
925 | }\r | |
926 | \r | |
927 | return EFI_SUCCESS;\r | |
928 | }\r | |
929 | \r | |
930 | /**\r | |
931 | Create root bridge device.\r | |
932 | \r | |
933 | @param RootBridgeHandle Specified root bridge hanle.\r | |
934 | \r | |
935 | @return The crated root bridge device instance, NULL means no\r | |
936 | root bridge device instance created.\r | |
937 | \r | |
938 | **/\r | |
939 | PCI_IO_DEVICE *\r | |
940 | CreateRootBridge (\r | |
941 | IN EFI_HANDLE RootBridgeHandle\r | |
942 | )\r | |
943 | {\r | |
944 | EFI_STATUS Status;\r | |
945 | PCI_IO_DEVICE *Dev;\r | |
946 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r | |
947 | EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;\r | |
948 | \r | |
949 | Dev = AllocateZeroPool (sizeof (PCI_IO_DEVICE));\r | |
950 | if (Dev == NULL) {\r | |
951 | return NULL;\r | |
952 | }\r | |
953 | \r | |
954 | Dev->Signature = PCI_IO_DEVICE_SIGNATURE;\r | |
955 | Dev->Handle = RootBridgeHandle;\r | |
956 | InitializeListHead (&Dev->ChildList);\r | |
957 | \r | |
958 | Status = gBS->OpenProtocol (\r | |
959 | RootBridgeHandle,\r | |
960 | &gEfiDevicePathProtocolGuid,\r | |
961 | (VOID **) &ParentDevicePath,\r | |
962 | gPciBusDriverBinding.DriverBindingHandle,\r | |
963 | RootBridgeHandle,\r | |
964 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
965 | );\r | |
966 | \r | |
967 | if (EFI_ERROR (Status)) {\r | |
968 | FreePool (Dev);\r | |
969 | return NULL;\r | |
970 | }\r | |
971 | \r | |
972 | //\r | |
973 | // Record the root bridge parent device path\r | |
974 | //\r | |
975 | Dev->DevicePath = DuplicateDevicePath (ParentDevicePath);\r | |
976 | \r | |
977 | //\r | |
978 | // Get the pci root bridge io protocol\r | |
979 | //\r | |
980 | Status = gBS->OpenProtocol (\r | |
981 | RootBridgeHandle,\r | |
982 | &gEfiPciRootBridgeIoProtocolGuid,\r | |
983 | (VOID **) &PciRootBridgeIo,\r | |
984 | gPciBusDriverBinding.DriverBindingHandle,\r | |
985 | RootBridgeHandle,\r | |
986 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
987 | );\r | |
988 | \r | |
989 | if (EFI_ERROR (Status)) {\r | |
990 | FreePciDevice (Dev);\r | |
991 | return NULL;\r | |
992 | }\r | |
993 | \r | |
994 | Dev->PciRootBridgeIo = PciRootBridgeIo;\r | |
995 | \r | |
996 | //\r | |
997 | // Initialize the PCI I/O instance structure\r | |
998 | //\r | |
999 | InitializePciIoInstance (Dev);\r | |
1000 | InitializePciDriverOverrideInstance (Dev);\r | |
1001 | InitializePciLoadFile2 (Dev);\r | |
1002 | \r | |
1003 | //\r | |
1004 | // Initialize reserved resource list and\r | |
1005 | // option rom driver list\r | |
1006 | //\r | |
1007 | InitializeListHead (&Dev->ReservedResourceList);\r | |
1008 | InitializeListHead (&Dev->OptionRomDriverList);\r | |
1009 | \r | |
1010 | return Dev;\r | |
1011 | }\r | |
1012 | \r | |
1013 | /**\r | |
1014 | Get root bridge device instance by specific root bridge handle.\r | |
1015 | \r | |
1016 | @param RootBridgeHandle Given root bridge handle.\r | |
1017 | \r | |
1018 | @return The root bridge device instance, NULL means no root bridge\r | |
1019 | device instance found.\r | |
1020 | \r | |
1021 | **/\r | |
1022 | PCI_IO_DEVICE *\r | |
1023 | GetRootBridgeByHandle (\r | |
1024 | EFI_HANDLE RootBridgeHandle\r | |
1025 | )\r | |
1026 | {\r | |
1027 | PCI_IO_DEVICE *RootBridgeDev;\r | |
1028 | LIST_ENTRY *CurrentLink;\r | |
1029 | \r | |
1030 | CurrentLink = mPciDevicePool.ForwardLink;\r | |
1031 | \r | |
1032 | while (CurrentLink != NULL && CurrentLink != &mPciDevicePool) {\r | |
1033 | \r | |
1034 | RootBridgeDev = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
1035 | if (RootBridgeDev->Handle == RootBridgeHandle) {\r | |
1036 | return RootBridgeDev;\r | |
1037 | }\r | |
1038 | \r | |
1039 | CurrentLink = CurrentLink->ForwardLink;\r | |
1040 | }\r | |
1041 | \r | |
1042 | return NULL;\r | |
1043 | }\r | |
1044 | \r | |
1045 | /**\r | |
1046 | Judege whether Pci device existed.\r | |
1047 | \r | |
1048 | @param Bridge Parent bridege instance.\r | |
1049 | @param PciIoDevice Device instance.\r | |
1050 | \r | |
1051 | @retval TRUE Pci device existed.\r | |
1052 | @retval FALSE Pci device did not exist.\r | |
1053 | \r | |
1054 | **/\r | |
1055 | BOOLEAN\r | |
1056 | PciDeviceExisted (\r | |
1057 | IN PCI_IO_DEVICE *Bridge,\r | |
1058 | IN PCI_IO_DEVICE *PciIoDevice\r | |
1059 | )\r | |
1060 | {\r | |
1061 | \r | |
1062 | PCI_IO_DEVICE *Temp;\r | |
1063 | LIST_ENTRY *CurrentLink;\r | |
1064 | \r | |
1065 | CurrentLink = Bridge->ChildList.ForwardLink;\r | |
1066 | \r | |
1067 | while (CurrentLink != NULL && CurrentLink != &Bridge->ChildList) {\r | |
1068 | \r | |
1069 | Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
1070 | \r | |
1071 | if (Temp == PciIoDevice) {\r | |
1072 | return TRUE;\r | |
1073 | }\r | |
1074 | \r | |
1075 | if (!IsListEmpty (&Temp->ChildList)) {\r | |
1076 | if (PciDeviceExisted (Temp, PciIoDevice)) {\r | |
1077 | return TRUE;\r | |
1078 | }\r | |
1079 | }\r | |
1080 | \r | |
1081 | CurrentLink = CurrentLink->ForwardLink;\r | |
1082 | }\r | |
1083 | \r | |
1084 | return FALSE;\r | |
1085 | }\r | |
1086 | \r | |
1087 | /**\r | |
1088 | Get the active VGA device on the same segment.\r | |
1089 | \r | |
1090 | @param VgaDevice PCI IO instance for the VGA device.\r | |
1091 | \r | |
1092 | @return The active VGA device on the same segment.\r | |
1093 | \r | |
1094 | **/\r | |
1095 | PCI_IO_DEVICE *\r | |
1096 | ActiveVGADeviceOnTheSameSegment (\r | |
1097 | IN PCI_IO_DEVICE *VgaDevice\r | |
1098 | )\r | |
1099 | {\r | |
1100 | LIST_ENTRY *CurrentLink;\r | |
1101 | PCI_IO_DEVICE *Temp;\r | |
1102 | \r | |
1103 | CurrentLink = mPciDevicePool.ForwardLink;\r | |
1104 | \r | |
1105 | while (CurrentLink != NULL && CurrentLink != &mPciDevicePool) {\r | |
1106 | \r | |
1107 | Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
1108 | \r | |
1109 | if (Temp->PciRootBridgeIo->SegmentNumber == VgaDevice->PciRootBridgeIo->SegmentNumber) {\r | |
1110 | \r | |
1111 | Temp = ActiveVGADeviceOnTheRootBridge (Temp);\r | |
1112 | \r | |
1113 | if (Temp != NULL) {\r | |
1114 | return Temp;\r | |
1115 | }\r | |
1116 | }\r | |
1117 | \r | |
1118 | CurrentLink = CurrentLink->ForwardLink;\r | |
1119 | }\r | |
1120 | \r | |
1121 | return NULL;\r | |
1122 | }\r | |
1123 | \r | |
1124 | /**\r | |
1125 | Get the active VGA device on the root bridge.\r | |
1126 | \r | |
1127 | @param RootBridge PCI IO instance for the root bridge.\r | |
1128 | \r | |
1129 | @return The active VGA device.\r | |
1130 | \r | |
1131 | **/\r | |
1132 | PCI_IO_DEVICE *\r | |
1133 | ActiveVGADeviceOnTheRootBridge (\r | |
1134 | IN PCI_IO_DEVICE *RootBridge\r | |
1135 | )\r | |
1136 | {\r | |
1137 | LIST_ENTRY *CurrentLink;\r | |
1138 | PCI_IO_DEVICE *Temp;\r | |
1139 | \r | |
1140 | CurrentLink = RootBridge->ChildList.ForwardLink;\r | |
1141 | \r | |
1142 | while (CurrentLink != NULL && CurrentLink != &RootBridge->ChildList) {\r | |
1143 | \r | |
1144 | Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
1145 | \r | |
1146 | if (IS_PCI_VGA(&Temp->Pci) &&\r | |
1147 | (Temp->Attributes &\r | |
1148 | (EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY |\r | |
1149 | EFI_PCI_IO_ATTRIBUTE_VGA_IO |\r | |
1150 | EFI_PCI_IO_ATTRIBUTE_VGA_IO_16)) != 0) {\r | |
1151 | return Temp;\r | |
1152 | }\r | |
1153 | \r | |
1154 | if (IS_PCI_BRIDGE (&Temp->Pci)) {\r | |
1155 | \r | |
1156 | Temp = ActiveVGADeviceOnTheRootBridge (Temp);\r | |
1157 | \r | |
1158 | if (Temp != NULL) {\r | |
1159 | return Temp;\r | |
1160 | }\r | |
1161 | }\r | |
1162 | \r | |
1163 | CurrentLink = CurrentLink->ForwardLink;\r | |
1164 | }\r | |
1165 | \r | |
1166 | return NULL;\r | |
1167 | }\r | |
1168 | \r | |
1169 | \r | |
1170 | /**\r | |
1171 | Get HPC PCI address according to its device path.\r | |
1172 | \r | |
1173 | @param RootBridge Root bridege Io instance.\r | |
1174 | @param RemainingDevicePath Given searching device path.\r | |
1175 | @param PciAddress Buffer holding searched result.\r | |
1176 | \r | |
1177 | @retval EFI_SUCCESS PCI address was stored in PciAddress\r | |
1178 | @retval EFI_NOT_FOUND Can not find the specific device path.\r | |
1179 | \r | |
1180 | **/\r | |
1181 | EFI_STATUS\r | |
1182 | GetHpcPciAddressFromRootBridge (\r | |
1183 | IN PCI_IO_DEVICE *RootBridge,\r | |
1184 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath,\r | |
1185 | OUT UINT64 *PciAddress\r | |
1186 | )\r | |
1187 | {\r | |
1188 | EFI_DEV_PATH_PTR Node;\r | |
1189 | PCI_IO_DEVICE *Temp;\r | |
1190 | EFI_DEVICE_PATH_PROTOCOL *CurrentDevicePath;\r | |
1191 | LIST_ENTRY *CurrentLink;\r | |
1192 | BOOLEAN MisMatch;\r | |
1193 | \r | |
1194 | MisMatch = FALSE;\r | |
1195 | \r | |
1196 | CurrentDevicePath = RemainingDevicePath;\r | |
1197 | Node.DevPath = CurrentDevicePath;\r | |
1198 | Temp = NULL;\r | |
1199 | \r | |
1200 | while (!IsDevicePathEnd (CurrentDevicePath)) {\r | |
1201 | \r | |
1202 | CurrentLink = RootBridge->ChildList.ForwardLink;\r | |
1203 | Node.DevPath = CurrentDevicePath;\r | |
1204 | \r | |
1205 | while (CurrentLink != NULL && CurrentLink != &RootBridge->ChildList) {\r | |
1206 | Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
1207 | \r | |
1208 | if (Node.Pci->Device == Temp->DeviceNumber &&\r | |
1209 | Node.Pci->Function == Temp->FunctionNumber) {\r | |
1210 | RootBridge = Temp;\r | |
1211 | break;\r | |
1212 | }\r | |
1213 | \r | |
1214 | CurrentLink = CurrentLink->ForwardLink;\r | |
1215 | }\r | |
1216 | \r | |
1217 | //\r | |
1218 | // Check if we find the bridge\r | |
1219 | //\r | |
1220 | if (CurrentLink == &RootBridge->ChildList) {\r | |
1221 | \r | |
1222 | MisMatch = TRUE;\r | |
1223 | break;\r | |
1224 | \r | |
1225 | }\r | |
1226 | \r | |
1227 | CurrentDevicePath = NextDevicePathNode (CurrentDevicePath);\r | |
1228 | }\r | |
1229 | \r | |
1230 | if (MisMatch) {\r | |
1231 | \r | |
1232 | CurrentDevicePath = NextDevicePathNode (CurrentDevicePath);\r | |
1233 | \r | |
1234 | if (IsDevicePathEnd (CurrentDevicePath)) {\r | |
1235 | *PciAddress = EFI_PCI_ADDRESS (RootBridge->BusNumber, Node.Pci->Device, Node.Pci->Function, 0);\r | |
1236 | return EFI_SUCCESS;\r | |
1237 | }\r | |
1238 | \r | |
1239 | return EFI_NOT_FOUND;\r | |
1240 | }\r | |
1241 | \r | |
1242 | if (Temp != NULL) {\r | |
1243 | *PciAddress = EFI_PCI_ADDRESS (Temp->BusNumber, Temp->DeviceNumber, Temp->FunctionNumber, 0);\r | |
1244 | } else {\r | |
1245 | return EFI_NOT_FOUND;\r | |
1246 | }\r | |
1247 | \r | |
1248 | return EFI_SUCCESS;\r | |
1249 | \r | |
1250 | }\r | |
1251 | \r |