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1 | /*++\r | |
2 | \r | |
3 | Copyright (c) 2005 - 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 | PciDeviceSupport.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | This file provides routine to support Pci device node manipulation\r | |
19 | \r | |
20 | Revision History\r | |
21 | \r | |
22 | --*/\r | |
23 | \r | |
24 | #include "PciBus.h"\r | |
25 | \r | |
26 | //\r | |
27 | // This device structure is serviced as a header.\r | |
28 | // Its Next field points to the first root bridge device node\r | |
29 | //\r | |
30 | LIST_ENTRY gPciDevicePool;\r | |
31 | \r | |
32 | EFI_STATUS\r | |
33 | InitializePciDevicePool (\r | |
34 | VOID\r | |
35 | )\r | |
36 | /*++\r | |
37 | \r | |
38 | Routine Description:\r | |
39 | \r | |
40 | Initialize the gPciDevicePool\r | |
41 | \r | |
42 | Arguments:\r | |
43 | \r | |
44 | Returns:\r | |
45 | \r | |
46 | None\r | |
47 | \r | |
48 | --*/\r | |
49 | {\r | |
50 | InitializeListHead (&gPciDevicePool);\r | |
51 | \r | |
52 | return EFI_SUCCESS;\r | |
53 | }\r | |
54 | \r | |
55 | EFI_STATUS\r | |
56 | InsertRootBridge (\r | |
57 | IN PCI_IO_DEVICE *RootBridge\r | |
58 | )\r | |
59 | /*++\r | |
60 | \r | |
61 | Routine Description:\r | |
62 | \r | |
63 | Insert a root bridge into PCI device pool\r | |
64 | \r | |
65 | Arguments:\r | |
66 | \r | |
67 | RootBridge - A pointer to the PCI_IO_DEVICE.\r | |
68 | \r | |
69 | Returns:\r | |
70 | \r | |
71 | None\r | |
72 | \r | |
73 | --*/\r | |
74 | {\r | |
75 | InsertTailList (&gPciDevicePool, &(RootBridge->Link));\r | |
76 | \r | |
77 | return EFI_SUCCESS;\r | |
78 | }\r | |
79 | \r | |
80 | EFI_STATUS\r | |
81 | InsertPciDevice (\r | |
82 | PCI_IO_DEVICE *Bridge,\r | |
83 | PCI_IO_DEVICE *PciDeviceNode\r | |
84 | )\r | |
85 | /*++\r | |
86 | \r | |
87 | Routine Description:\r | |
88 | \r | |
89 | This function is used to insert a PCI device node under\r | |
90 | a bridge\r | |
91 | \r | |
92 | Arguments:\r | |
93 | Bridge - A pointer to the PCI_IO_DEVICE.\r | |
94 | PciDeviceNode - A pointer to the PCI_IO_DEVICE.\r | |
95 | \r | |
96 | Returns:\r | |
97 | \r | |
98 | None\r | |
99 | \r | |
100 | --*/\r | |
101 | \r | |
102 | {\r | |
103 | \r | |
104 | InsertTailList (&Bridge->ChildList, &(PciDeviceNode->Link));\r | |
105 | PciDeviceNode->Parent = Bridge;\r | |
106 | \r | |
107 | return EFI_SUCCESS;\r | |
108 | }\r | |
109 | \r | |
110 | EFI_STATUS\r | |
111 | DestroyRootBridge (\r | |
112 | IN PCI_IO_DEVICE *RootBridge\r | |
113 | )\r | |
114 | /*++\r | |
115 | \r | |
116 | Routine Description:\r | |
117 | \r | |
118 | \r | |
119 | Arguments:\r | |
120 | \r | |
121 | RootBridge - A pointer to the PCI_IO_DEVICE.\r | |
122 | \r | |
123 | Returns:\r | |
124 | \r | |
125 | None\r | |
126 | \r | |
127 | --*/\r | |
128 | {\r | |
129 | DestroyPciDeviceTree (RootBridge);\r | |
130 | \r | |
131 | gBS->FreePool (RootBridge);\r | |
132 | \r | |
133 | return EFI_SUCCESS;\r | |
134 | }\r | |
135 | \r | |
136 | EFI_STATUS\r | |
137 | DestroyPciDeviceTree (\r | |
138 | IN PCI_IO_DEVICE *Bridge\r | |
139 | )\r | |
140 | /*++\r | |
141 | \r | |
142 | Routine Description:\r | |
143 | \r | |
144 | Destroy all the pci device node under the bridge.\r | |
145 | Bridge itself is not included.\r | |
146 | \r | |
147 | Arguments:\r | |
148 | \r | |
149 | Bridge - A pointer to the PCI_IO_DEVICE.\r | |
150 | \r | |
151 | Returns:\r | |
152 | \r | |
153 | None\r | |
154 | \r | |
155 | --*/\r | |
156 | {\r | |
157 | LIST_ENTRY *CurrentLink;\r | |
158 | PCI_IO_DEVICE *Temp;\r | |
159 | \r | |
160 | while (!IsListEmpty (&Bridge->ChildList)) {\r | |
161 | \r | |
162 | CurrentLink = Bridge->ChildList.ForwardLink;\r | |
163 | \r | |
164 | //\r | |
165 | // Remove this node from the linked list\r | |
166 | //\r | |
167 | RemoveEntryList (CurrentLink);\r | |
168 | \r | |
169 | Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
170 | \r | |
171 | if (IS_PCI_BRIDGE (&(Temp->Pci))) {\r | |
172 | DestroyPciDeviceTree (Temp);\r | |
173 | }\r | |
174 | gBS->FreePool (Temp);\r | |
175 | }\r | |
176 | \r | |
177 | return EFI_SUCCESS;\r | |
178 | }\r | |
179 | \r | |
180 | EFI_STATUS\r | |
181 | DestroyRootBridgeByHandle (\r | |
182 | EFI_HANDLE Controller\r | |
183 | )\r | |
184 | /*++\r | |
185 | \r | |
186 | Routine Description:\r | |
187 | \r | |
188 | Destroy all device nodes under the root bridge\r | |
189 | specified by Controller. \r | |
190 | The root bridge itself is also included.\r | |
191 | \r | |
192 | Arguments:\r | |
193 | \r | |
194 | Controller - An efi handle.\r | |
195 | \r | |
196 | Returns:\r | |
197 | \r | |
198 | None\r | |
199 | \r | |
200 | --*/\r | |
201 | {\r | |
202 | \r | |
203 | LIST_ENTRY *CurrentLink;\r | |
204 | PCI_IO_DEVICE *Temp;\r | |
205 | \r | |
206 | CurrentLink = gPciDevicePool.ForwardLink;\r | |
207 | \r | |
208 | while (CurrentLink && CurrentLink != &gPciDevicePool) {\r | |
209 | Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
210 | \r | |
211 | if (Temp->Handle == Controller) {\r | |
212 | \r | |
213 | RemoveEntryList (CurrentLink);\r | |
214 | \r | |
215 | DestroyPciDeviceTree (Temp);\r | |
216 | \r | |
217 | gBS->FreePool(Temp);\r | |
218 | \r | |
219 | return EFI_SUCCESS;\r | |
220 | }\r | |
221 | \r | |
222 | CurrentLink = CurrentLink->ForwardLink;\r | |
223 | }\r | |
224 | \r | |
225 | return EFI_NOT_FOUND;\r | |
226 | }\r | |
227 | \r | |
228 | EFI_STATUS\r | |
229 | RegisterPciDevice (\r | |
230 | IN EFI_HANDLE Controller,\r | |
231 | IN PCI_IO_DEVICE *PciIoDevice,\r | |
232 | OUT EFI_HANDLE *Handle OPTIONAL\r | |
233 | )\r | |
234 | /*++\r | |
235 | \r | |
236 | Routine Description:\r | |
237 | \r | |
238 | This function registers the PCI IO device. It creates a handle for this PCI IO device \r | |
239 | (if the handle does not exist), attaches appropriate protocols onto the handle, does\r | |
240 | necessary initialization, and sets up parent/child relationship with its bus controller.\r | |
241 | \r | |
242 | Arguments:\r | |
243 | \r | |
244 | Controller - An EFI handle for the PCI bus controller.\r | |
245 | PciIoDevice - A PCI_IO_DEVICE pointer to the PCI IO device to be registered.\r | |
246 | Handle - A pointer to hold the EFI handle for the PCI IO device.\r | |
247 | \r | |
248 | Returns:\r | |
249 | \r | |
250 | EFI_SUCCESS - The PCI device is successfully registered.\r | |
251 | Others - An error occurred when registering the PCI device.\r | |
252 | \r | |
253 | --*/\r | |
254 | {\r | |
255 | EFI_STATUS Status;\r | |
256 | UINT8 PciExpressCapRegOffset;\r | |
257 | \r | |
258 | //\r | |
259 | // Install the pciio protocol, device path protocol and \r | |
260 | // Bus Specific Driver Override Protocol\r | |
261 | //\r | |
262 | \r | |
263 | if (PciIoDevice->BusOverride) {\r | |
264 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
265 | &PciIoDevice->Handle, \r | |
266 | &gEfiDevicePathProtocolGuid,\r | |
267 | PciIoDevice->DevicePath,\r | |
268 | &gEfiPciIoProtocolGuid,\r | |
269 | &PciIoDevice->PciIo,\r | |
270 | &gEfiBusSpecificDriverOverrideProtocolGuid,\r | |
271 | &PciIoDevice->PciDriverOverride,\r | |
272 | NULL\r | |
273 | );\r | |
274 | } else {\r | |
275 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
276 | &PciIoDevice->Handle, \r | |
277 | &gEfiDevicePathProtocolGuid,\r | |
278 | PciIoDevice->DevicePath,\r | |
279 | &gEfiPciIoProtocolGuid,\r | |
280 | &PciIoDevice->PciIo,\r | |
281 | NULL\r | |
282 | );\r | |
283 | }\r | |
284 | \r | |
285 | if (EFI_ERROR (Status)) {\r | |
286 | return Status;\r | |
287 | } else {\r | |
288 | Status = gBS->OpenProtocol (\r | |
289 | Controller, \r | |
290 | &gEfiPciRootBridgeIoProtocolGuid, \r | |
291 | (VOID **)&(PciIoDevice->PciRootBridgeIo),\r | |
292 | gPciBusDriverBinding.DriverBindingHandle,\r | |
293 | PciIoDevice->Handle, \r | |
294 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
295 | );\r | |
296 | if (EFI_ERROR (Status)) {\r | |
297 | return Status;\r | |
298 | }\r | |
299 | }\r | |
300 | \r | |
301 | if (Handle != NULL) {\r | |
302 | *Handle = PciIoDevice->Handle;\r | |
303 | }\r | |
304 | \r | |
305 | //\r | |
306 | // Detect if PCI Express Device\r | |
307 | //\r | |
308 | PciExpressCapRegOffset = 0;\r | |
309 | Status = LocateCapabilityRegBlock (\r | |
310 | PciIoDevice,\r | |
311 | EFI_PCI_CAPABILITY_ID_PCIEXP,\r | |
312 | &PciExpressCapRegOffset,\r | |
313 | NULL\r | |
314 | );\r | |
315 | if (!EFI_ERROR (Status)) {\r | |
316 | PciIoDevice->IsPciExp = TRUE;\r | |
317 | DEBUG ((EFI_D_ERROR, "PciExp - %x (B-%x, D-%x, F-%x)\n", PciIoDevice->IsPciExp, PciIoDevice->BusNumber, PciIoDevice->DeviceNumber, PciIoDevice->FunctionNumber));\r | |
318 | }\r | |
319 | \r | |
320 | //\r | |
321 | // Indicate the pci device is registered\r | |
322 | //\r | |
323 | PciIoDevice->Registered = TRUE;\r | |
324 | \r | |
325 | return EFI_SUCCESS;\r | |
326 | }\r | |
327 | \r | |
328 | \r | |
329 | EFI_STATUS\r | |
330 | DeRegisterPciDevice (\r | |
331 | IN EFI_HANDLE Controller,\r | |
332 | IN EFI_HANDLE Handle\r | |
333 | )\r | |
334 | /*++\r | |
335 | \r | |
336 | Routine Description:\r | |
337 | \r | |
338 | This function is used to de-register the PCI device from the EFI,\r | |
339 | That includes un-installing PciIo protocol from the specified PCI \r | |
340 | device handle.\r | |
341 | \r | |
342 | Arguments:\r | |
343 | \r | |
344 | Controller - An efi handle.\r | |
345 | Handle - An efi handle.\r | |
346 | \r | |
347 | Returns:\r | |
348 | \r | |
349 | None\r | |
350 | \r | |
351 | --*/\r | |
352 | {\r | |
353 | EFI_PCI_IO_PROTOCOL *PciIo;\r | |
354 | EFI_STATUS Status;\r | |
355 | PCI_IO_DEVICE *PciIoDevice;\r | |
356 | PCI_IO_DEVICE *Node;\r | |
357 | LIST_ENTRY *CurrentLink;\r | |
358 | EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;\r | |
359 | \r | |
360 | Status = gBS->OpenProtocol (\r | |
361 | Handle,\r | |
362 | &gEfiPciIoProtocolGuid,\r | |
363 | (VOID **) &PciIo,\r | |
364 | gPciBusDriverBinding.DriverBindingHandle,\r | |
365 | Controller,\r | |
366 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
367 | );\r | |
368 | if (!EFI_ERROR (Status)) {\r | |
369 | PciIoDevice = PCI_IO_DEVICE_FROM_PCI_IO_THIS (PciIo);\r | |
370 | \r | |
371 | //\r | |
372 | // If it is already de-registered\r | |
373 | //\r | |
374 | if (!PciIoDevice->Registered) {\r | |
375 | return EFI_SUCCESS;\r | |
376 | }\r | |
377 | \r | |
378 | //\r | |
379 | // If it is PPB, first de-register its children\r | |
380 | //\r | |
381 | \r | |
382 | if (IS_PCI_BRIDGE (&(PciIoDevice->Pci))) {\r | |
383 | \r | |
384 | CurrentLink = PciIoDevice->ChildList.ForwardLink;\r | |
385 | \r | |
386 | while (CurrentLink && CurrentLink != &PciIoDevice->ChildList) {\r | |
387 | Node = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
388 | Status = DeRegisterPciDevice (Controller, Node->Handle);\r | |
389 | \r | |
390 | if (EFI_ERROR (Status)) {\r | |
391 | return Status;\r | |
392 | }\r | |
393 | \r | |
394 | CurrentLink = CurrentLink->ForwardLink;\r | |
395 | }\r | |
396 | }\r | |
397 | \r | |
398 | //\r | |
399 | // First disconnect this device\r | |
400 | //\r | |
401 | // PciIoDevice->PciIo.Attributes(&(PciIoDevice->PciIo),\r | |
402 | // EfiPciIoAttributeOperationDisable,\r | |
403 | // EFI_PCI_DEVICE_ENABLE,\r | |
404 | // NULL\r | |
405 | // );\r | |
406 | \r | |
407 | //\r | |
408 | // Close the child handle\r | |
409 | //\r | |
410 | Status = gBS->CloseProtocol (\r | |
411 | Controller,\r | |
412 | &gEfiPciRootBridgeIoProtocolGuid,\r | |
413 | gPciBusDriverBinding.DriverBindingHandle,\r | |
414 | Handle\r | |
415 | );\r | |
416 | \r | |
417 | //\r | |
418 | // Un-install the device path protocol and pci io protocol\r | |
419 | //\r | |
420 | if (PciIoDevice->BusOverride) {\r | |
421 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
422 | Handle,\r | |
423 | &gEfiDevicePathProtocolGuid,\r | |
424 | PciIoDevice->DevicePath,\r | |
425 | &gEfiPciIoProtocolGuid,\r | |
426 | &PciIoDevice->PciIo,\r | |
427 | &gEfiBusSpecificDriverOverrideProtocolGuid,\r | |
428 | &PciIoDevice->PciDriverOverride,\r | |
429 | NULL\r | |
430 | );\r | |
431 | } else {\r | |
432 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
433 | Handle,\r | |
434 | &gEfiDevicePathProtocolGuid,\r | |
435 | PciIoDevice->DevicePath,\r | |
436 | &gEfiPciIoProtocolGuid,\r | |
437 | &PciIoDevice->PciIo,\r | |
438 | NULL\r | |
439 | );\r | |
440 | }\r | |
441 | \r | |
442 | if (EFI_ERROR (Status)) {\r | |
443 | gBS->OpenProtocol (\r | |
444 | Controller,\r | |
445 | &gEfiPciRootBridgeIoProtocolGuid,\r | |
446 | (VOID **) &PciRootBridgeIo,\r | |
447 | gPciBusDriverBinding.DriverBindingHandle,\r | |
448 | Handle,\r | |
449 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
450 | );\r | |
451 | return Status;\r | |
452 | }\r | |
453 | \r | |
454 | //\r | |
455 | // The Device Driver should disable this device after disconnect\r | |
456 | // so the Pci Bus driver will not touch this device any more.\r | |
457 | // Restore the register field to the original value\r | |
458 | //\r | |
459 | PciIoDevice->Registered = FALSE;\r | |
460 | PciIoDevice->Handle = NULL;\r | |
461 | } else {\r | |
462 | \r | |
463 | //\r | |
464 | // Handle may be closed before\r | |
465 | //\r | |
466 | return EFI_SUCCESS;\r | |
467 | }\r | |
468 | \r | |
469 | return EFI_SUCCESS;\r | |
470 | }\r | |
471 | \r | |
472 | EFI_STATUS\r | |
473 | EnableBridgeAttributes (\r | |
474 | IN PCI_IO_DEVICE *PciIoDevice\r | |
475 | )\r | |
476 | {\r | |
477 | PCI_TYPE01 PciData;\r | |
478 | \r | |
479 | //\r | |
480 | // NOTE: We should not set EFI_PCI_DEVICE_ENABLE for a bridge\r | |
481 | // directly, because some legacy BIOS will NOT assign\r | |
482 | // IO or Memory resource for a bridge who has no child\r | |
483 | // device. So we add check IO or Memory here.\r | |
484 | //\r | |
485 | \r | |
486 | PciIoDevice->PciIo.Pci.Read (\r | |
487 | &PciIoDevice->PciIo,\r | |
488 | EfiPciIoWidthUint8,\r | |
489 | 0,\r | |
490 | sizeof (PciData),\r | |
491 | &PciData\r | |
492 | );\r | |
493 | \r | |
494 | if ((((PciData.Bridge.IoBase & 0xF) == 0) &&\r | |
495 | (PciData.Bridge.IoBase != 0 || PciData.Bridge.IoLimit != 0)) ||\r | |
496 | (((PciData.Bridge.IoBase & 0xF) == 1) &&\r | |
497 | ((PciData.Bridge.IoBase & 0xF0) != 0 || (PciData.Bridge.IoLimit & 0xF0) != 0 || PciData.Bridge.IoBaseUpper16 != 0 || PciData.Bridge.IoLimitUpper16 != 0))) {\r | |
498 | PciIoDevice->PciIo.Attributes(\r | |
499 | &(PciIoDevice->PciIo),\r | |
500 | EfiPciIoAttributeOperationEnable,\r | |
501 | (EFI_PCI_IO_ATTRIBUTE_IO | EFI_PCI_IO_ATTRIBUTE_BUS_MASTER),\r | |
502 | NULL\r | |
503 | );\r | |
504 | }\r | |
505 | if ((PciData.Bridge.MemoryBase & 0xFFF0) != 0 || (PciData.Bridge.MemoryLimit & 0xFFF0) != 0) {\r | |
506 | PciIoDevice->PciIo.Attributes(\r | |
507 | &(PciIoDevice->PciIo),\r | |
508 | EfiPciIoAttributeOperationEnable,\r | |
509 | (EFI_PCI_IO_ATTRIBUTE_MEMORY | EFI_PCI_IO_ATTRIBUTE_BUS_MASTER),\r | |
510 | NULL\r | |
511 | );\r | |
512 | }\r | |
513 | if ((((PciData.Bridge.PrefetchableMemoryBase & 0xF) == 0) &&\r | |
514 | (PciData.Bridge.PrefetchableMemoryBase != 0 || PciData.Bridge.PrefetchableMemoryLimit != 0)) ||\r | |
515 | (((PciData.Bridge.PrefetchableMemoryBase & 0xF) == 1) &&\r | |
516 | ((PciData.Bridge.PrefetchableMemoryBase & 0xFFF0) != 0 || (PciData.Bridge.PrefetchableMemoryLimit & 0xFFF0) != 0 || PciData.Bridge.PrefetchableBaseUpper32 != 0 || PciData.Bridge.PrefetchableLimitUpper32 != 0))) {\r | |
517 | PciIoDevice->PciIo.Attributes(\r | |
518 | &(PciIoDevice->PciIo),\r | |
519 | EfiPciIoAttributeOperationEnable,\r | |
520 | (EFI_PCI_IO_ATTRIBUTE_MEMORY | EFI_PCI_IO_ATTRIBUTE_BUS_MASTER),\r | |
521 | NULL\r | |
522 | );\r | |
523 | }\r | |
524 | \r | |
525 | return EFI_SUCCESS;\r | |
526 | }\r | |
527 | \r | |
528 | EFI_STATUS \r | |
529 | StartPciDevicesOnBridge (\r | |
530 | IN EFI_HANDLE Controller,\r | |
531 | IN PCI_IO_DEVICE *RootBridge,\r | |
532 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath \r | |
533 | )\r | |
534 | /*++\r | |
535 | \r | |
536 | Routine Description:\r | |
537 | \r | |
538 | Start to manage the PCI device on specified the root bridge or PCI-PCI Bridge\r | |
539 | \r | |
540 | Arguments:\r | |
541 | \r | |
542 | Controller - An efi handle.\r | |
543 | RootBridge - A pointer to the PCI_IO_DEVICE.\r | |
544 | RemainingDevicePath - A pointer to the EFI_DEVICE_PATH_PROTOCOL.\r | |
545 | NumberOfChildren - Children number.\r | |
546 | ChildHandleBuffer - A pointer to the child handle buffer.\r | |
547 | \r | |
548 | Returns:\r | |
549 | \r | |
550 | None\r | |
551 | \r | |
552 | --*/\r | |
553 | {\r | |
554 | PCI_IO_DEVICE *Temp;\r | |
555 | PCI_IO_DEVICE *PciIoDevice;\r | |
556 | EFI_DEV_PATH_PTR Node;\r | |
557 | EFI_DEVICE_PATH_PROTOCOL *CurrentDevicePath;\r | |
558 | EFI_STATUS Status;\r | |
559 | LIST_ENTRY *CurrentLink;\r | |
560 | \r | |
561 | CurrentLink = RootBridge->ChildList.ForwardLink;\r | |
562 | \r | |
563 | while (CurrentLink && CurrentLink != &RootBridge->ChildList) {\r | |
564 | \r | |
565 | Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
566 | if (RemainingDevicePath != NULL) {\r | |
567 | \r | |
568 | Node.DevPath = RemainingDevicePath;\r | |
569 | \r | |
570 | if (Node.Pci->Device != Temp->DeviceNumber || \r | |
571 | Node.Pci->Function != Temp->FunctionNumber) {\r | |
572 | CurrentLink = CurrentLink->ForwardLink;\r | |
573 | continue;\r | |
574 | }\r | |
575 | \r | |
576 | //\r | |
577 | // Check if the device has been assigned with required resource\r | |
578 | //\r | |
579 | if (!Temp->Allocated) {\r | |
580 | return EFI_NOT_READY;\r | |
581 | }\r | |
582 | \r | |
583 | //\r | |
584 | // Check if the current node has been registered before\r | |
585 | // If it is not, register it\r | |
586 | //\r | |
587 | if (!Temp->Registered) {\r | |
588 | PciIoDevice = Temp;\r | |
589 | \r | |
590 | Status = RegisterPciDevice (\r | |
591 | Controller,\r | |
592 | PciIoDevice,\r | |
593 | NULL\r | |
594 | );\r | |
595 | \r | |
596 | }\r | |
597 | \r | |
598 | //\r | |
599 | // Get the next device path\r | |
600 | //\r | |
601 | CurrentDevicePath = NextDevicePathNode (RemainingDevicePath);\r | |
602 | if (IsDevicePathEnd (CurrentDevicePath)) {\r | |
603 | return EFI_SUCCESS;\r | |
604 | }\r | |
605 | \r | |
606 | //\r | |
607 | // If it is a PPB\r | |
608 | //\r | |
609 | if (IS_PCI_BRIDGE (&(Temp->Pci))) {\r | |
610 | Status = StartPciDevicesOnBridge (\r | |
611 | Controller,\r | |
612 | Temp,\r | |
613 | CurrentDevicePath\r | |
614 | );\r | |
615 | EnableBridgeAttributes (Temp);\r | |
616 | \r | |
617 | return Status;\r | |
618 | } else {\r | |
619 | \r | |
620 | //\r | |
621 | // Currently, the PCI bus driver only support PCI-PCI bridge\r | |
622 | //\r | |
623 | return EFI_UNSUPPORTED;\r | |
624 | }\r | |
625 | \r | |
626 | } else {\r | |
627 | \r | |
628 | //\r | |
629 | // If remaining device path is NULL,\r | |
630 | // try to enable all the pci devices under this bridge\r | |
631 | //\r | |
632 | \r | |
633 | if (!Temp->Registered && Temp->Allocated) {\r | |
634 | \r | |
635 | PciIoDevice = Temp;\r | |
636 | \r | |
637 | Status = RegisterPciDevice (\r | |
638 | Controller,\r | |
639 | PciIoDevice,\r | |
640 | NULL\r | |
641 | );\r | |
642 | \r | |
643 | }\r | |
644 | \r | |
645 | if (IS_PCI_BRIDGE (&(Temp->Pci))) {\r | |
646 | Status = StartPciDevicesOnBridge ( \r | |
647 | Controller,\r | |
648 | Temp,\r | |
649 | RemainingDevicePath\r | |
650 | );\r | |
651 | EnableBridgeAttributes (Temp);\r | |
652 | }\r | |
653 | \r | |
654 | CurrentLink = CurrentLink->ForwardLink;\r | |
655 | continue;\r | |
656 | }\r | |
657 | }\r | |
658 | \r | |
659 | return EFI_NOT_FOUND;\r | |
660 | }\r | |
661 | \r | |
662 | EFI_STATUS\r | |
663 | StartPciDevices (\r | |
664 | IN EFI_HANDLE Controller,\r | |
665 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
666 | )\r | |
667 | /*++\r | |
668 | \r | |
669 | Routine Description:\r | |
670 | \r | |
671 | Start to manage the PCI device according to RemainingDevicePath\r | |
672 | If RemainingDevicePath == NULL, the PCI bus driver will start \r | |
673 | to manage all the PCI devices it found previously\r | |
674 | \r | |
675 | Arguments:\r | |
676 | Controller - An efi handle.\r | |
677 | RemainingDevicePath - A pointer to the EFI_DEVICE_PATH_PROTOCOL.\r | |
678 | \r | |
679 | Returns:\r | |
680 | \r | |
681 | None\r | |
682 | \r | |
683 | --*/\r | |
684 | {\r | |
685 | EFI_DEV_PATH_PTR Node;\r | |
686 | PCI_IO_DEVICE *RootBridge;\r | |
687 | LIST_ENTRY *CurrentLink;\r | |
688 | \r | |
689 | if (RemainingDevicePath != NULL) {\r | |
690 | \r | |
691 | //\r | |
692 | // Check if the RemainingDevicePath is valid\r | |
693 | //\r | |
694 | Node.DevPath = RemainingDevicePath;\r | |
695 | if (Node.DevPath->Type != HARDWARE_DEVICE_PATH ||\r | |
696 | Node.DevPath->SubType != HW_PCI_DP ||\r | |
697 | DevicePathNodeLength (Node.DevPath) != sizeof (PCI_DEVICE_PATH)\r | |
698 | ) {\r | |
699 | return EFI_UNSUPPORTED;\r | |
700 | }\r | |
701 | }\r | |
702 | \r | |
703 | CurrentLink = gPciDevicePool.ForwardLink;\r | |
704 | \r | |
705 | while (CurrentLink && CurrentLink != &gPciDevicePool) {\r | |
706 | \r | |
707 | RootBridge = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
708 | //\r | |
709 | // Locate the right root bridge to start\r | |
710 | //\r | |
711 | if (RootBridge->Handle == Controller) {\r | |
712 | StartPciDevicesOnBridge (\r | |
713 | Controller,\r | |
714 | RootBridge,\r | |
715 | RemainingDevicePath\r | |
716 | );\r | |
717 | }\r | |
718 | \r | |
719 | CurrentLink = CurrentLink->ForwardLink;\r | |
720 | }\r | |
721 | \r | |
722 | return EFI_SUCCESS;\r | |
723 | }\r | |
724 | \r | |
725 | PCI_IO_DEVICE *\r | |
726 | CreateRootBridge (\r | |
727 | IN EFI_HANDLE RootBridgeHandle\r | |
728 | )\r | |
729 | /*++\r | |
730 | \r | |
731 | Routine Description:\r | |
732 | \r | |
733 | \r | |
734 | Arguments:\r | |
735 | RootBridgeHandle - An efi handle.\r | |
736 | \r | |
737 | Returns:\r | |
738 | \r | |
739 | None\r | |
740 | \r | |
741 | --*/\r | |
742 | {\r | |
743 | \r | |
744 | EFI_STATUS Status;\r | |
745 | PCI_IO_DEVICE *Dev;\r | |
746 | \r | |
747 | Dev = NULL;\r | |
748 | Status = gBS->AllocatePool (\r | |
749 | EfiBootServicesData,\r | |
750 | sizeof (PCI_IO_DEVICE),\r | |
751 | (VOID **) &Dev\r | |
752 | );\r | |
753 | \r | |
754 | if (EFI_ERROR (Status)) {\r | |
755 | return NULL;\r | |
756 | }\r | |
757 | \r | |
758 | ZeroMem (Dev, sizeof (PCI_IO_DEVICE));\r | |
759 | Dev->Signature = PCI_IO_DEVICE_SIGNATURE;\r | |
760 | Dev->Handle = RootBridgeHandle;\r | |
761 | InitializeListHead (&Dev->ChildList);\r | |
762 | \r | |
763 | return Dev;\r | |
764 | }\r | |
765 | \r | |
766 | PCI_IO_DEVICE *\r | |
767 | GetRootBridgeByHandle (\r | |
768 | EFI_HANDLE RootBridgeHandle\r | |
769 | )\r | |
770 | /*++\r | |
771 | \r | |
772 | Routine Description:\r | |
773 | \r | |
774 | \r | |
775 | Arguments:\r | |
776 | \r | |
777 | RootBridgeHandle - An efi handle.\r | |
778 | \r | |
779 | Returns:\r | |
780 | \r | |
781 | None\r | |
782 | \r | |
783 | --*/\r | |
784 | {\r | |
785 | PCI_IO_DEVICE *RootBridgeDev;\r | |
786 | LIST_ENTRY *CurrentLink;\r | |
787 | \r | |
788 | CurrentLink = gPciDevicePool.ForwardLink;\r | |
789 | \r | |
790 | while (CurrentLink && CurrentLink != &gPciDevicePool) {\r | |
791 | \r | |
792 | RootBridgeDev = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
793 | if (RootBridgeDev->Handle == RootBridgeHandle) {\r | |
794 | return RootBridgeDev;\r | |
795 | }\r | |
796 | \r | |
797 | CurrentLink = CurrentLink->ForwardLink;\r | |
798 | }\r | |
799 | \r | |
800 | return NULL;\r | |
801 | }\r | |
802 | \r | |
803 | BOOLEAN\r | |
804 | RootBridgeExisted (\r | |
805 | IN EFI_HANDLE RootBridgeHandle\r | |
806 | )\r | |
807 | /*++\r | |
808 | \r | |
809 | Routine Description:\r | |
810 | \r | |
811 | This function searches if RootBridgeHandle has already existed\r | |
812 | in current device pool.\r | |
813 | \r | |
814 | If so, it means the given root bridge has been already enumerated.\r | |
815 | \r | |
816 | Arguments:\r | |
817 | \r | |
818 | RootBridgeHandle - An efi handle.\r | |
819 | \r | |
820 | Returns:\r | |
821 | \r | |
822 | None\r | |
823 | \r | |
824 | --*/\r | |
825 | {\r | |
826 | PCI_IO_DEVICE *Bridge;\r | |
827 | \r | |
828 | Bridge = GetRootBridgeByHandle (RootBridgeHandle);\r | |
829 | \r | |
830 | if (Bridge != NULL) {\r | |
831 | return TRUE;\r | |
832 | }\r | |
833 | \r | |
834 | return FALSE;\r | |
835 | }\r | |
836 | \r | |
837 | BOOLEAN\r | |
838 | PciDeviceExisted (\r | |
839 | IN PCI_IO_DEVICE *Bridge,\r | |
840 | IN PCI_IO_DEVICE *PciIoDevice\r | |
841 | )\r | |
842 | /*++\r | |
843 | \r | |
844 | Routine Description:\r | |
845 | \r | |
846 | Arguments:\r | |
847 | \r | |
848 | Bridge - A pointer to the PCI_IO_DEVICE.\r | |
849 | PciIoDevice - A pointer to the PCI_IO_DEVICE.\r | |
850 | \r | |
851 | Returns:\r | |
852 | \r | |
853 | None\r | |
854 | \r | |
855 | --*/\r | |
856 | {\r | |
857 | \r | |
858 | PCI_IO_DEVICE *Temp;\r | |
859 | LIST_ENTRY *CurrentLink;\r | |
860 | \r | |
861 | CurrentLink = Bridge->ChildList.ForwardLink;\r | |
862 | \r | |
863 | while (CurrentLink && CurrentLink != &Bridge->ChildList) {\r | |
864 | \r | |
865 | Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
866 | \r | |
867 | if (Temp == PciIoDevice) {\r | |
868 | return TRUE;\r | |
869 | }\r | |
870 | \r | |
871 | if (!IsListEmpty (&Temp->ChildList)) {\r | |
872 | if (PciDeviceExisted (Temp, PciIoDevice)) {\r | |
873 | return TRUE;\r | |
874 | }\r | |
875 | }\r | |
876 | \r | |
877 | CurrentLink = CurrentLink->ForwardLink;\r | |
878 | }\r | |
879 | \r | |
880 | return FALSE;\r | |
881 | }\r | |
882 | \r | |
883 | PCI_IO_DEVICE *\r | |
884 | ActiveVGADeviceOnTheSameSegment (\r | |
885 | IN PCI_IO_DEVICE *VgaDevice\r | |
886 | )\r | |
887 | /*++\r | |
888 | \r | |
889 | Routine Description:\r | |
890 | \r | |
891 | Arguments:\r | |
892 | \r | |
893 | VgaDevice - A pointer to the PCI_IO_DEVICE.\r | |
894 | \r | |
895 | Returns:\r | |
896 | \r | |
897 | None\r | |
898 | \r | |
899 | --*/\r | |
900 | {\r | |
901 | LIST_ENTRY *CurrentLink;\r | |
902 | PCI_IO_DEVICE *Temp;\r | |
903 | \r | |
904 | CurrentLink = gPciDevicePool.ForwardLink;\r | |
905 | \r | |
906 | while (CurrentLink && CurrentLink != &gPciDevicePool) {\r | |
907 | \r | |
908 | Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
909 | \r | |
910 | if (Temp->PciRootBridgeIo->SegmentNumber == VgaDevice->PciRootBridgeIo->SegmentNumber) {\r | |
911 | \r | |
912 | Temp = ActiveVGADeviceOnTheRootBridge (Temp);\r | |
913 | \r | |
914 | if (Temp != NULL) {\r | |
915 | return Temp;\r | |
916 | }\r | |
917 | }\r | |
918 | \r | |
919 | CurrentLink = CurrentLink->ForwardLink;\r | |
920 | }\r | |
921 | \r | |
922 | return NULL;\r | |
923 | }\r | |
924 | \r | |
925 | PCI_IO_DEVICE *\r | |
926 | ActiveVGADeviceOnTheRootBridge (\r | |
927 | IN PCI_IO_DEVICE *RootBridge\r | |
928 | )\r | |
929 | /*++\r | |
930 | \r | |
931 | Routine Description:\r | |
932 | \r | |
933 | Arguments:\r | |
934 | \r | |
935 | RootBridge - A pointer to the PCI_IO_DEVICE.\r | |
936 | \r | |
937 | Returns:\r | |
938 | \r | |
939 | None\r | |
940 | \r | |
941 | --*/\r | |
942 | {\r | |
943 | LIST_ENTRY *CurrentLink;\r | |
944 | PCI_IO_DEVICE *Temp;\r | |
945 | \r | |
946 | CurrentLink = RootBridge->ChildList.ForwardLink;\r | |
947 | \r | |
948 | while (CurrentLink && CurrentLink != &RootBridge->ChildList) {\r | |
949 | \r | |
950 | Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r | |
951 | \r | |
952 | if (IS_PCI_VGA(&Temp->Pci) && \r | |
953 | (Temp->Attributes &\r | |
954 | (EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY |\r | |
955 | EFI_PCI_IO_ATTRIBUTE_VGA_IO |\r | |
956 | EFI_PCI_IO_ATTRIBUTE_VGA_IO_16))) {\r | |
957 | return Temp;\r | |
958 | }\r | |
959 | \r | |
960 | if (IS_PCI_BRIDGE (&Temp->Pci)) {\r | |
961 | \r | |
962 | Temp = ActiveVGADeviceOnTheRootBridge (Temp);\r | |
963 | \r | |
964 | if (Temp != NULL) {\r | |
965 | return Temp;\r | |
966 | }\r | |
967 | }\r | |
968 | \r | |
969 | CurrentLink = CurrentLink->ForwardLink;\r | |
970 | }\r | |
971 | \r | |
972 | return NULL;\r | |
973 | }\r |