VOID
NTAPI
PciInitializeFdoExtensionCommonFields(PPCI_FDO_EXTENSION FdoExtension,
IN PDEVICE_OBJECT DeviceObject,
IN PDEVICE_OBJECT PhysicalDeviceObject)
{
/* Initialize the extension */
RtlZeroMemory(FdoExtension, sizeof(PCI_FDO_EXTENSION));
/* Setup the common fields */
FdoExtension->PhysicalDeviceObject = PhysicalDeviceObject;
FdoExtension->FunctionalDeviceObject = DeviceObject;
FdoExtension->ExtensionType = PciFdoExtensionType;
FdoExtension->PowerState.CurrentSystemState = PowerSystemWorking;
FdoExtension->PowerState.CurrentDeviceState = PowerDeviceD0;
FdoExtension->IrpDispatchTable = &PciFdoDispatchTable;
/* Initialize the extension locks */
KeInitializeEvent(&FdoExtension->SecondaryExtLock, SynchronizationEvent, TRUE);
KeInitializeEvent(&FdoExtension->ChildListLock, SynchronizationEvent, TRUE);
/* Initialize the default state */
PciInitializeState(FdoExtension);
}
NTSTATUS
NTAPI
PciPdoCreate(IN PPCI_FDO_EXTENSION DeviceExtension,
IN PCI_SLOT_NUMBER Slot,
OUT PDEVICE_OBJECT *PdoDeviceObject)
{
WCHAR DeviceName[32];
UNICODE_STRING DeviceString;
NTSTATUS Status;
PDEVICE_OBJECT DeviceObject;
PPCI_PDO_EXTENSION PdoExtension;
ULONG SequenceNumber;
PAGED_CODE();
/* Pick an atomically unique sequence number for this device */
SequenceNumber = InterlockedIncrement(&PciPdoSequenceNumber);
/* Create the standard PCI device name for a PDO */
swprintf(DeviceName, L"\\Device\\NTPNP_PCI%04d", SequenceNumber);
RtlInitUnicodeString(&DeviceString, DeviceName);
/* Create the actual device now */
Status = IoCreateDevice(DeviceExtension->FunctionalDeviceObject->DriverObject,
sizeof(PCI_PDO_EXTENSION),
&DeviceString,
FILE_DEVICE_BUS_EXTENDER,
0,
0,
&DeviceObject);
ASSERT(NT_SUCCESS(Status));
/* Get the extension for it */
PdoExtension = (PPCI_PDO_EXTENSION)DeviceObject->DeviceExtension;
DPRINT1("PCI: New PDO (b=0x%x, d=0x%x, f=0x%x) @ %p, ext @ %p\n",
DeviceExtension->BaseBus,
Slot.u.bits.DeviceNumber,
Slot.u.bits.FunctionNumber,
DeviceObject,
DeviceObject->DeviceExtension);
/* Configure the extension */
PdoExtension->ExtensionType = PciPdoExtensionType;
PdoExtension->IrpDispatchTable = &PciPdoDispatchTable;
PdoExtension->PhysicalDeviceObject = DeviceObject;
PdoExtension->Slot = Slot;
PdoExtension->PowerState.CurrentSystemState = PowerDeviceD0;
PdoExtension->PowerState.CurrentDeviceState = PowerDeviceD0;
PdoExtension->ParentFdoExtension = DeviceExtension;
/* Initialize the lock for arbiters and other interfaces */
KeInitializeEvent(&PdoExtension->SecondaryExtLock, SynchronizationEvent, TRUE);
/* Initialize the state machine */
PciInitializeState((PPCI_FDO_EXTENSION)PdoExtension);
/* Add the PDO to the parent's list */
PdoExtension->Next = NULL;
PciInsertEntryAtTail((PSINGLE_LIST_ENTRY)&DeviceExtension->ChildPdoList,
(PPCI_FDO_EXTENSION)PdoExtension,
&DeviceExtension->ChildListLock);
/* And finally return it to the caller */
*PdoDeviceObject = DeviceObject;
return STATUS_SUCCESS;
}
