reactos/drivers/bus/pcix/fdo.c

   1 /*
   2  * PROJECT:         ReactOS PCI Bus Driver
   3  * LICENSE:         BSD - See COPYING.ARM in the top level directory
   4  * FILE:            drivers/bus/pci/fdo.c
   5  * PURPOSE:         FDO Device Management
   6  * PROGRAMMERS:     ReactOS Portable Systems Group
   7  */
   8
   9 /* INCLUDES *******************************************************************/
  10
  11 #include <pci.h>
  12
  13 #define NDEBUG
  14 #include <debug.h>
  15
  16 /* GLOBALS ********************************************************************/
  17
  18 SINGLE_LIST_ENTRY PciFdoExtensionListHead;
  19 BOOLEAN PciBreakOnDefault;
  20
  21 PCI_MN_DISPATCH_TABLE PciFdoDispatchPowerTable[] =
  22 {
  23     {IRP_DISPATCH, (PCI_DISPATCH_FUNCTION)PciFdoWaitWake},
  24     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciIrpNotSupported},
  25     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciFdoSetPowerState},
  26     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciFdoIrpQueryPower},
  27     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciIrpNotSupported}
  28 };
  29
  30 PCI_MN_DISPATCH_TABLE PciFdoDispatchPnpTable[] =
  31 {
  32     {IRP_UPWARD,   (PCI_DISPATCH_FUNCTION)PciFdoIrpStartDevice},
  33     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciFdoIrpQueryRemoveDevice},
  34     {IRP_DISPATCH, (PCI_DISPATCH_FUNCTION)PciFdoIrpRemoveDevice},
  35     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciFdoIrpCancelRemoveDevice},
  36     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciFdoIrpStopDevice},
  37     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciFdoIrpQueryStopDevice},
  38     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciFdoIrpCancelStopDevice},
  39     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciFdoIrpQueryDeviceRelations},
  40     {IRP_DISPATCH, (PCI_DISPATCH_FUNCTION)PciFdoIrpQueryInterface},
  41     {IRP_UPWARD,   (PCI_DISPATCH_FUNCTION)PciFdoIrpQueryCapabilities},
  42     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciIrpNotSupported},
  43     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciIrpNotSupported},
  44     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciIrpNotSupported},
  45     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciIrpNotSupported},
  46     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciIrpNotSupported},
  47     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciIrpNotSupported},
  48     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciIrpNotSupported},
  49     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciIrpNotSupported},
  50     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciIrpNotSupported},
  51     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciIrpNotSupported},
  52     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciIrpNotSupported},
  53     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciIrpNotSupported},
  54     {IRP_UPWARD,   (PCI_DISPATCH_FUNCTION)PciFdoIrpDeviceUsageNotification},
  55     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciFdoIrpSurpriseRemoval},
  56     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciFdoIrpQueryLegacyBusInformation},
  57     {IRP_DOWNWARD, (PCI_DISPATCH_FUNCTION)PciIrpNotSupported}
  58 };
  59
  60 PCI_MJ_DISPATCH_TABLE PciFdoDispatchTable =
  61 {
  62     IRP_MN_QUERY_LEGACY_BUS_INFORMATION,
  63     PciFdoDispatchPnpTable,
  64     IRP_MN_QUERY_POWER,
  65     PciFdoDispatchPowerTable,
  66     IRP_DOWNWARD,
  67     (PCI_DISPATCH_FUNCTION)PciIrpNotSupported,
  68     IRP_DOWNWARD,
  69     (PCI_DISPATCH_FUNCTION)PciIrpNotSupported
  70 };
  71
  72 /* FUNCTIONS ******************************************************************/
  73
  74 NTSTATUS
  75 NTAPI
  76 PciFdoIrpStartDevice(IN PIRP Irp,
  77                      IN PIO_STACK_LOCATION IoStackLocation,
  78                      IN PPCI_FDO_EXTENSION DeviceExtension)
  79 {
  80     NTSTATUS Status;
  81     PCM_RESOURCE_LIST Resources;
  82     PAGED_CODE();
  83
  84     /* The device stack must be starting the FDO in a success path */
  85     if (!NT_SUCCESS(Irp->IoStatus.Status)) return STATUS_NOT_SUPPORTED;
  86
  87     /* Attempt to switch the state machine to the started state */
  88     Status = PciBeginStateTransition(DeviceExtension, PciStarted);
  89     if (!NT_SUCCESS(Status)) return Status;
  90
  91     /* Check for any boot-provided resources */
  92     Resources = IoStackLocation->Parameters.StartDevice.AllocatedResources;
  93     if ((Resources) && !(PCI_IS_ROOT_FDO(DeviceExtension)))
  94     {
  95         /* These resources would only be for non-root FDOs, unhandled for now */
  96         ASSERT(Resources->Count == 1);
  97         UNIMPLEMENTED_DBGBREAK();
  98     }
  99
 100     /* Initialize the arbiter for this FDO */
 101     Status = PciInitializeArbiterRanges(DeviceExtension, Resources);
 102     if (!NT_SUCCESS(Status))
 103     {
 104         /* Cancel the transition if this failed */
 105         PciCancelStateTransition(DeviceExtension, PciStarted);
 106         return Status;
 107     }
 108
 109     /* Again, check for boot-provided resources for non-root FDO */
 110     if ((Resources) && !(PCI_IS_ROOT_FDO(DeviceExtension)))
 111     {
 112         /* Unhandled for now */
 113         ASSERT(Resources->Count == 1);
 114         UNIMPLEMENTED_DBGBREAK();
 115     }
 116
 117     /* Commit the transition to the started state */
 118     PciCommitStateTransition(DeviceExtension, PciStarted);
 119     return STATUS_SUCCESS;
 120 }
 121
 122 NTSTATUS
 123 NTAPI
 124 PciFdoIrpQueryRemoveDevice(IN PIRP Irp,
 125                            IN PIO_STACK_LOCATION IoStackLocation,
 126                            IN PPCI_FDO_EXTENSION DeviceExtension)
 127 {
 128     UNREFERENCED_PARAMETER(Irp);
 129     UNREFERENCED_PARAMETER(IoStackLocation);
 130     UNREFERENCED_PARAMETER(DeviceExtension);
 131
 132     UNIMPLEMENTED;
 133     return STATUS_NOT_SUPPORTED;
 134 }
 135
 136 NTSTATUS
 137 NTAPI
 138 PciFdoIrpRemoveDevice(IN PIRP Irp,
 139                       IN PIO_STACK_LOCATION IoStackLocation,
 140                       IN PPCI_FDO_EXTENSION DeviceExtension)
 141 {
 142     UNREFERENCED_PARAMETER(Irp);
 143     UNREFERENCED_PARAMETER(IoStackLocation);
 144     UNREFERENCED_PARAMETER(DeviceExtension);
 145
 146     UNIMPLEMENTED_DBGBREAK();
 147     return STATUS_NOT_SUPPORTED;
 148 }
 149
 150 NTSTATUS
 151 NTAPI
 152 PciFdoIrpCancelRemoveDevice(IN PIRP Irp,
 153                             IN PIO_STACK_LOCATION IoStackLocation,
 154                             IN PPCI_FDO_EXTENSION DeviceExtension)
 155 {
 156     UNREFERENCED_PARAMETER(Irp);
 157     UNREFERENCED_PARAMETER(IoStackLocation);
 158     UNREFERENCED_PARAMETER(DeviceExtension);
 159
 160     UNIMPLEMENTED_DBGBREAK();
 161     return STATUS_NOT_SUPPORTED;
 162 }
 163
 164 NTSTATUS
 165 NTAPI
 166 PciFdoIrpStopDevice(IN PIRP Irp,
 167                     IN PIO_STACK_LOCATION IoStackLocation,
 168                     IN PPCI_FDO_EXTENSION DeviceExtension)
 169 {
 170     UNREFERENCED_PARAMETER(Irp);
 171     UNREFERENCED_PARAMETER(IoStackLocation);
 172     UNREFERENCED_PARAMETER(DeviceExtension);
 173
 174     UNIMPLEMENTED_DBGBREAK();
 175     return STATUS_NOT_SUPPORTED;
 176 }
 177
 178 NTSTATUS
 179 NTAPI
 180 PciFdoIrpQueryStopDevice(IN PIRP Irp,
 181                          IN PIO_STACK_LOCATION IoStackLocation,
 182                          IN PPCI_FDO_EXTENSION DeviceExtension)
 183 {
 184     UNREFERENCED_PARAMETER(Irp);
 185     UNREFERENCED_PARAMETER(IoStackLocation);
 186     UNREFERENCED_PARAMETER(DeviceExtension);
 187
 188     UNIMPLEMENTED_DBGBREAK();
 189     return STATUS_NOT_SUPPORTED;
 190 }
 191
 192 NTSTATUS
 193 NTAPI
 194 PciFdoIrpCancelStopDevice(IN PIRP Irp,
 195                           IN PIO_STACK_LOCATION IoStackLocation,
 196                           IN PPCI_FDO_EXTENSION DeviceExtension)
 197 {
 198     UNREFERENCED_PARAMETER(Irp);
 199     UNREFERENCED_PARAMETER(IoStackLocation);
 200     UNREFERENCED_PARAMETER(DeviceExtension);
 201
 202     UNIMPLEMENTED_DBGBREAK();
 203     return STATUS_NOT_SUPPORTED;
 204 }
 205
 206 NTSTATUS
 207 NTAPI
 208 PciFdoIrpQueryDeviceRelations(IN PIRP Irp,
 209                               IN PIO_STACK_LOCATION IoStackLocation,
 210                               IN PPCI_FDO_EXTENSION DeviceExtension)
 211 {
 212     NTSTATUS Status;
 213     PAGED_CODE();
 214
 215     /* Are bus relations being queried? */
 216     if (IoStackLocation->Parameters.QueryDeviceRelations.Type != BusRelations)
 217     {
 218         /* The FDO is a bus, so only bus relations can be obtained */
 219         Status = STATUS_NOT_SUPPORTED;
 220     }
 221     else
 222     {
 223         /* Scan the PCI bus and build the device relations for the caller */
 224         Status = PciQueryDeviceRelations(DeviceExtension,
 225                                          (PDEVICE_RELATIONS*)
 226                                          &Irp->IoStatus.Information);
 227     }
 228
 229     /* Return the enumeration status back */
 230     return Status;
 231 }
 232
 233 NTSTATUS
 234 NTAPI
 235 PciFdoIrpQueryInterface(IN PIRP Irp,
 236                         IN PIO_STACK_LOCATION IoStackLocation,
 237                         IN PPCI_FDO_EXTENSION DeviceExtension)
 238 {
 239     NTSTATUS Status;
 240     PAGED_CODE();
 241     ASSERT(DeviceExtension->ExtensionType == PciFdoExtensionType);
 242
 243     /* Deleted extensions don't respond to IRPs */
 244     if (DeviceExtension->DeviceState == PciDeleted)
 245     {
 246         /* Hand it back to try to deal with it */
 247         return PciPassIrpFromFdoToPdo(DeviceExtension, Irp);
 248     }
 249
 250     /* Query our driver for this interface */
 251     Status = PciQueryInterface(DeviceExtension,
 252                                IoStackLocation->Parameters.QueryInterface.
 253                                InterfaceType,
 254                                IoStackLocation->Parameters.QueryInterface.
 255                                Size,
 256                                IoStackLocation->Parameters.QueryInterface.
 257                                Version,
 258                                IoStackLocation->Parameters.QueryInterface.
 259                                InterfaceSpecificData,
 260                                IoStackLocation->Parameters.QueryInterface.
 261                                Interface,
 262                                FALSE);
 263     if (NT_SUCCESS(Status))
 264     {
 265         /* We found it, let the PDO handle it */
 266         Irp->IoStatus.Status = Status;
 267         return PciPassIrpFromFdoToPdo(DeviceExtension, Irp);
 268     }
 269     else if (Status == STATUS_NOT_SUPPORTED)
 270     {
 271         /* Otherwise, we can't handle it, let someone else down the stack try */
 272         Status = PciCallDownIrpStack(DeviceExtension, Irp);
 273         if (Status == STATUS_NOT_SUPPORTED)
 274         {
 275             /* They can't either, try a last-resort interface lookup */
 276             Status = PciQueryInterface(DeviceExtension,
 277                                        IoStackLocation->Parameters.QueryInterface.
 278                                        InterfaceType,
 279                                        IoStackLocation->Parameters.QueryInterface.
 280                                        Size,
 281                                        IoStackLocation->Parameters.QueryInterface.
 282                                        Version,
 283                                        IoStackLocation->Parameters.QueryInterface.
 284                                        InterfaceSpecificData,
 285                                        IoStackLocation->Parameters.QueryInterface.
 286                                        Interface,
 287                                        TRUE);
 288         }
 289     }
 290
 291     /* Has anyone claimed this interface yet? */
 292     if (Status == STATUS_NOT_SUPPORTED)
 293     {
 294         /* No, return the original IRP status */
 295         Status = Irp->IoStatus.Status;
 296     }
 297     else
 298     {
 299         /* Yes, set the new IRP status */
 300         Irp->IoStatus.Status = Status;
 301     }
 302
 303     /* Complete this IRP */
 304     IoCompleteRequest(Irp, IO_NO_INCREMENT);
 305     return Status;
 306 }
 307
 308 NTSTATUS
 309 NTAPI
 310 PciFdoIrpQueryCapabilities(IN PIRP Irp,
 311                            IN PIO_STACK_LOCATION IoStackLocation,
 312                            IN PPCI_FDO_EXTENSION DeviceExtension)
 313 {
 314     PDEVICE_CAPABILITIES Capabilities;
 315     PAGED_CODE();
 316     ASSERT_FDO(DeviceExtension);
 317
 318     UNREFERENCED_PARAMETER(Irp);
 319
 320     /* Get the capabilities */
 321     Capabilities = IoStackLocation->Parameters.DeviceCapabilities.Capabilities;
 322
 323     /* Inherit wake levels and power mappings from the higher-up capabilities */
 324     DeviceExtension->PowerState.SystemWakeLevel = Capabilities->SystemWake;
 325     DeviceExtension->PowerState.DeviceWakeLevel = Capabilities->DeviceWake;
 326     RtlCopyMemory(DeviceExtension->PowerState.SystemStateMapping,
 327                   Capabilities->DeviceState,
 328                   sizeof(DeviceExtension->PowerState.SystemStateMapping));
 329
 330     /* Dump the capabilities and return success */
 331     PciDebugDumpQueryCapabilities(Capabilities);
 332     return STATUS_SUCCESS;
 333 }
 334
 335 NTSTATUS
 336 NTAPI
 337 PciFdoIrpDeviceUsageNotification(IN PIRP Irp,
 338                                  IN PIO_STACK_LOCATION IoStackLocation,
 339                                  IN PPCI_FDO_EXTENSION DeviceExtension)
 340 {
 341     UNREFERENCED_PARAMETER(Irp);
 342     UNREFERENCED_PARAMETER(IoStackLocation);
 343     UNREFERENCED_PARAMETER(DeviceExtension);
 344
 345     UNIMPLEMENTED_DBGBREAK();
 346     return STATUS_NOT_SUPPORTED;
 347 }
 348
 349 NTSTATUS
 350 NTAPI
 351 PciFdoIrpSurpriseRemoval(IN PIRP Irp,
 352                          IN PIO_STACK_LOCATION IoStackLocation,
 353                          IN PPCI_FDO_EXTENSION DeviceExtension)
 354 {
 355     UNREFERENCED_PARAMETER(Irp);
 356     UNREFERENCED_PARAMETER(IoStackLocation);
 357     UNREFERENCED_PARAMETER(DeviceExtension);
 358
 359     UNIMPLEMENTED_DBGBREAK();
 360     return STATUS_NOT_SUPPORTED;
 361 }
 362
 363 NTSTATUS
 364 NTAPI
 365 PciFdoIrpQueryLegacyBusInformation(IN PIRP Irp,
 366                                    IN PIO_STACK_LOCATION IoStackLocation,
 367                                    IN PPCI_FDO_EXTENSION DeviceExtension)
 368 {
 369     UNREFERENCED_PARAMETER(Irp);
 370     UNREFERENCED_PARAMETER(IoStackLocation);
 371     UNREFERENCED_PARAMETER(DeviceExtension);
 372
 373     UNIMPLEMENTED_DBGBREAK();
 374     return STATUS_NOT_SUPPORTED;
 375 }
 376
 377 VOID
 378 NTAPI
 379 PciGetHotPlugParameters(IN PPCI_FDO_EXTENSION FdoExtension)
 380 {
 381     ACPI_EVAL_INPUT_BUFFER InputBuffer;
 382     PACPI_EVAL_OUTPUT_BUFFER OutputBuffer;
 383     ULONG Length;
 384     NTSTATUS Status;
 385     PAGED_CODE();
 386
 387     /* We should receive 4 parameters, per the HPP specification */
 388     Length = sizeof(ACPI_EVAL_OUTPUT_BUFFER) + 4 * sizeof(ACPI_METHOD_ARGUMENT);
 389
 390     /* Allocate the buffer to hold the parameters */
 391     OutputBuffer = ExAllocatePoolWithTag(PagedPool, Length, PCI_POOL_TAG);
 392     if (!OutputBuffer) return;
 393
 394     /* Initialize the output and input buffers. The method is _HPP */
 395     RtlZeroMemory(OutputBuffer, Length);
 396     *(PULONG)InputBuffer.MethodName = 'PPH_';
 397     InputBuffer.Signature = ACPI_EVAL_INPUT_BUFFER_SIGNATURE;
 398     do
 399     {
 400         /* Send the IOCTL to the ACPI driver */
 401         Status = PciSendIoctl(FdoExtension->PhysicalDeviceObject,
 402                               IOCTL_ACPI_EVAL_METHOD,
 403                               &InputBuffer,
 404                               sizeof(InputBuffer),
 405                               OutputBuffer,
 406                               Length);
 407         if (!NT_SUCCESS(Status))
 408         {
 409             /* The method failed, check if we can salvage data from parent */
 410             if (!PCI_IS_ROOT_FDO(FdoExtension))
 411             {
 412                 /* Copy the root bus' hot plug parameters */
 413                 FdoExtension->HotPlugParameters = FdoExtension->ParentFdoExtension->HotPlugParameters;
 414             }
 415
 416             /* Nothing more to do on this path */
 417             break;
 418         }
 419
 420         /* ACPI sent back some data. 4 parameters are expected in the output */
 421         if (OutputBuffer->Count != 4) break;
 422
 423         /* HotPlug PCI Support not yet implemented */
 424         UNIMPLEMENTED_DBGBREAK();
 425     } while (FALSE);
 426
 427     /* Free the buffer and return */
 428     ExFreePoolWithTag(OutputBuffer, 0);
 429 }
 430
 431 VOID
 432 NTAPI
 433 PciInitializeFdoExtensionCommonFields(PPCI_FDO_EXTENSION FdoExtension,
 434                                       IN PDEVICE_OBJECT DeviceObject,
 435                                       IN PDEVICE_OBJECT PhysicalDeviceObject)
 436 {
 437     /* Initialize the extension */
 438     RtlZeroMemory(FdoExtension, sizeof(PCI_FDO_EXTENSION));
 439
 440     /* Setup the common fields */
 441     FdoExtension->PhysicalDeviceObject = PhysicalDeviceObject;
 442     FdoExtension->FunctionalDeviceObject = DeviceObject;
 443     FdoExtension->ExtensionType = PciFdoExtensionType;
 444     FdoExtension->PowerState.CurrentSystemState = PowerSystemWorking;
 445     FdoExtension->PowerState.CurrentDeviceState = PowerDeviceD0;
 446     FdoExtension->IrpDispatchTable = &PciFdoDispatchTable;
 447
 448     /* Initialize the extension locks */
 449     KeInitializeEvent(&FdoExtension->SecondaryExtLock, SynchronizationEvent, TRUE);
 450     KeInitializeEvent(&FdoExtension->ChildListLock, SynchronizationEvent, TRUE);
 451
 452     /* Initialize the default state */
 453     PciInitializeState(FdoExtension);
 454 }
 455
 456 NTSTATUS
 457 NTAPI
 458 PciAddDevice(IN PDRIVER_OBJECT DriverObject,
 459              IN PDEVICE_OBJECT PhysicalDeviceObject)
 460 {
 461     PCM_RESOURCE_LIST Descriptor;
 462     PDEVICE_OBJECT AttachedTo;
 463     PPCI_FDO_EXTENSION FdoExtension;
 464     PPCI_FDO_EXTENSION ParentExtension;
 465     PPCI_PDO_EXTENSION PdoExtension;
 466     PDEVICE_OBJECT DeviceObject;
 467     UCHAR Buffer[sizeof(KEY_VALUE_PARTIAL_INFORMATION) + sizeof(ULONG)];
 468     PKEY_VALUE_PARTIAL_INFORMATION ValueInfo = (PKEY_VALUE_PARTIAL_INFORMATION)Buffer;
 469     NTSTATUS Status;
 470     HANDLE KeyHandle;
 471     UNICODE_STRING ValueName;
 472     ULONG ResultLength;
 473     PAGED_CODE();
 474     DPRINT1("PCI - AddDevice (a new bus). PDO: %p (Driver: %wZ)\n",
 475             PhysicalDeviceObject, &PhysicalDeviceObject->DriverObject->DriverName);
 476
 477     /* Zero out variables so failure path knows what to do */
 478     AttachedTo = NULL;
 479     FdoExtension = NULL;
 480     PdoExtension = NULL;
 481     do
 482     {
 483         /* Check if there's already a device extension for this bus */
 484         ParentExtension = PciFindParentPciFdoExtension(PhysicalDeviceObject,
 485                                                        &PciGlobalLock);
 486         if (ParentExtension)
 487         {
 488             /* Make sure we find a real PDO */
 489             PdoExtension = PhysicalDeviceObject->DeviceExtension;
 490             ASSERT_PDO(PdoExtension);
 491
 492             /* Make sure it's a PCI-to-PCI bridge */
 493             if ((PdoExtension->BaseClass != PCI_CLASS_BRIDGE_DEV) ||
 494                 (PdoExtension->SubClass != PCI_SUBCLASS_BR_PCI_TO_PCI))
 495             {
 496                 /* This should never happen */
 497                 DPRINT1("PCI - PciAddDevice for Non-Root/Non-PCI-PCI bridge,\n"
 498                         "      Class %02x, SubClass %02x, will not add.\n",
 499                         PdoExtension->BaseClass,
 500                         PdoExtension->SubClass);
 501                 ASSERT((PdoExtension->BaseClass == PCI_CLASS_BRIDGE_DEV) &&
 502                        (PdoExtension->SubClass == PCI_SUBCLASS_BR_PCI_TO_PCI));
 503
 504                 /* Enter the failure path */
 505                 Status = STATUS_INVALID_DEVICE_REQUEST;
 506                 break;
 507             }
 508
 509             /* Subordinate bus on the bridge */
 510             DPRINT1("PCI - AddDevice (new bus is child of bus 0x%x).\n",
 511                     ParentExtension->BaseBus);
 512
 513             /* Make sure PCI bus numbers are configured */
 514             if (!PciAreBusNumbersConfigured(PdoExtension))
 515             {
 516                 /* This is a critical failure */
 517                 DPRINT1("PCI - Bus numbers not configured for bridge (0x%x.0x%x.0x%x)\n",
 518                         ParentExtension->BaseBus,
 519                         PdoExtension->Slot.u.bits.DeviceNumber,
 520                         PdoExtension->Slot.u.bits.FunctionNumber);
 521
 522                 /* Enter the failure path */
 523                 Status = STATUS_INVALID_DEVICE_REQUEST;
 524                 break;
 525             }
 526         }
 527
 528         /* Create the FDO for the bus */
 529         Status = IoCreateDevice(DriverObject,
 530                                 sizeof(PCI_FDO_EXTENSION),
 531                                 NULL,
 532                                 FILE_DEVICE_BUS_EXTENDER,
 533                                 0,
 534                                 0,
 535                                 &DeviceObject);
 536         if (!NT_SUCCESS(Status)) break;
 537
 538         /* Initialize the extension for the FDO */
 539         FdoExtension = DeviceObject->DeviceExtension;
 540         PciInitializeFdoExtensionCommonFields(DeviceObject->DeviceExtension,
 541                                               DeviceObject,
 542                                               PhysicalDeviceObject);
 543
 544         /* Attach to the root PDO */
 545         Status = STATUS_NO_SUCH_DEVICE;
 546         AttachedTo = IoAttachDeviceToDeviceStack(DeviceObject,
 547                                                  PhysicalDeviceObject);
 548         ASSERT(AttachedTo != NULL);
 549         if (!AttachedTo) break;
 550         FdoExtension->AttachedDeviceObject = AttachedTo;
 551
 552         /* Check if this is a child bus, or the root */
 553         if (ParentExtension)
 554         {
 555             /* The child inherits root data */
 556             FdoExtension->BaseBus = PdoExtension->Dependent.type1.SecondaryBus;
 557             FdoExtension->BusRootFdoExtension = ParentExtension->BusRootFdoExtension;
 558             PdoExtension->BridgeFdoExtension = FdoExtension;
 559             FdoExtension->ParentFdoExtension = ParentExtension;
 560         }
 561         else
 562         {
 563             /* Query the boot configuration */
 564             Status = PciGetDeviceProperty(PhysicalDeviceObject,
 565                                           DevicePropertyBootConfiguration,
 566                                           (PVOID*)&Descriptor);
 567             if (!NT_SUCCESS(Status))
 568             {
 569                 /* No configuration has been set */
 570                 Descriptor = NULL;
 571             }
 572             else
 573             {
 574                 /* Root PDO in ReactOS does not assign boot resources */
 575                 UNIMPLEMENTED_DBGBREAK("Encountered during setup\n");
 576                 Descriptor = NULL;
 577             }
 578
 579             if (Descriptor)
 580             {
 581                 /* Root PDO in ReactOS does not assign boot resources */
 582                 UNIMPLEMENTED_DBGBREAK();
 583             }
 584             else
 585             {
 586                 /* Default configuration isn't the normal path on Windows */
 587                 if (PciBreakOnDefault)
 588                 {
 589                     /* If a second bus is found and there's still no data, crash */
 590                     KeBugCheckEx(PCI_BUS_DRIVER_INTERNAL,
 591                                  0xDEAD0010u,
 592                                  (ULONG_PTR)DeviceObject,
 593                                  0,
 594                                  0);
 595                 }
 596
 597                 /* Warn that a default configuration will be used, and set bus 0 */
 598                 DPRINT1("PCI   Will use default configuration.\n");
 599                 PciBreakOnDefault = TRUE;
 600                 FdoExtension->BaseBus = 0;
 601             }
 602
 603             /* This is the root bus */
 604             FdoExtension->BusRootFdoExtension = FdoExtension;
 605         }
 606
 607         /* Get the HAL or ACPI Bus Handler Callbacks for Configuration Access */
 608         Status = PciGetConfigHandlers(FdoExtension);
 609         if (!NT_SUCCESS(Status)) break;
 610
 611         /* Initialize all the supported PCI arbiters */
 612         Status = PciInitializeArbiters(FdoExtension);
 613         if (!NT_SUCCESS(Status)) break;
 614
 615         /* This is a real FDO, insert it into the list */
 616         FdoExtension->Fake = FALSE;
 617         PciInsertEntryAtTail(&PciFdoExtensionListHead,
 618                              FdoExtension,
 619                              &PciGlobalLock);
 620
 621         /* Open the device registry key so that we can query the errata flags */
 622         IoOpenDeviceRegistryKey(DeviceObject,
 623                                 PLUGPLAY_REGKEY_DEVICE,
 624                                 KEY_ALL_ACCESS,
 625                                 &KeyHandle),
 626
 627         /* Open the value that contains errata flags for this bus instance */
 628         RtlInitUnicodeString(&ValueName, L"HackFlags");
 629         Status = ZwQueryValueKey(KeyHandle,
 630                                  &ValueName,
 631                                  KeyValuePartialInformation,
 632                                  ValueInfo,
 633                                  sizeof(Buffer),
 634                                  &ResultLength);
 635         ZwClose(KeyHandle);
 636         if (NT_SUCCESS(Status))
 637         {
 638             /* Make sure the data is of expected type and size */
 639             if ((ValueInfo->Type == REG_DWORD) &&
 640                 (ValueInfo->DataLength == sizeof(ULONG)))
 641             {
 642                 /* Read the flags for this bus */
 643                 FdoExtension->BusHackFlags = *(PULONG)&ValueInfo->Data;
 644             }
 645         }
 646
 647         /* Query ACPI for PCI HotPlug Support */
 648         PciGetHotPlugParameters(FdoExtension);
 649
 650         /* The Bus FDO is now initialized */
 651         DeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
 652         return STATUS_SUCCESS;
 653     } while (FALSE);
 654
 655     /* This is the failure path */
 656     ASSERT(!NT_SUCCESS(Status));
 657
 658     /* Check if the FDO extension exists */
 659     if (FdoExtension) DPRINT1("Should destroy secondaries\n");
 660
 661     /* Delete device objects */
 662     if (AttachedTo) IoDetachDevice(AttachedTo);
 663     if (DeviceObject) IoDeleteDevice(DeviceObject);
 664     return Status;
 665 }
 666
 667 /* EOF */