+PPCI_FDO_EXTENSION
+NTAPI
+PciFindParentPciFdoExtension(IN PDEVICE_OBJECT DeviceObject,
+ IN PKEVENT Lock)
+{
+ PPCI_FDO_EXTENSION FoundExtension;
+
+ /* Assume we'll find nothing */
+ FoundExtension = NULL;
+
+ /* Check if a lock was specified */
+ if (Lock)
+ {
+ /* Wait for the lock to be released */
+ KeEnterCriticalRegion();
+ KeWaitForSingleObject(Lock, Executive, KernelMode, FALSE, NULL);
+ }
+
+ /* Now search for the extension */
+ if (PciFdoExtensionListHead.Next)
+ {
+ /* This case should not be hit yet */
+ UNIMPLEMENTED;
+ while (TRUE);
+ }
+
+ /* Check if we had acquired a lock previously */
+ if (Lock)
+ {
+ /* Release it */
+ KeSetEvent(Lock, IO_NO_INCREMENT, FALSE);
+ KeLeaveCriticalRegion();
+ }
+
+ /* Return which extension was found, if any */
+ return FoundExtension;
+}
+
+VOID
+NTAPI
+PciInsertEntryAtTail(IN PSINGLE_LIST_ENTRY ListHead,
+ IN PPCI_FDO_EXTENSION DeviceExtension,
+ IN PKEVENT Lock)
+{
+ PSINGLE_LIST_ENTRY NextEntry;
+ PAGED_CODE();
+
+ /* Check if a lock was specified */
+ if (Lock)
+ {
+ /* Wait for the lock to be released */
+ KeEnterCriticalRegion();
+ KeWaitForSingleObject(Lock, Executive, KernelMode, FALSE, NULL);
+ }
+
+ /* Loop the list until we get to the end, then insert this entry there */
+ for (NextEntry = ListHead; NextEntry->Next; NextEntry = NextEntry->Next);
+ NextEntry->Next = &DeviceExtension->List;
+
+ /* Check if we had acquired a lock previously */
+ if (Lock)
+ {
+ /* Release it */
+ KeSetEvent(Lock, IO_NO_INCREMENT, FALSE);
+ KeLeaveCriticalRegion();
+ }
+}
+
+VOID
+NTAPI
+PciInsertEntryAtHead(IN PSINGLE_LIST_ENTRY ListHead,
+ IN PSINGLE_LIST_ENTRY Entry,
+ IN PKEVENT Lock)
+{
+ PAGED_CODE();
+
+ /* Check if a lock was specified */
+ if (Lock)
+ {
+ /* Wait for the lock to be released */
+ KeEnterCriticalRegion();
+ KeWaitForSingleObject(Lock, Executive, KernelMode, FALSE, NULL);
+ }
+
+ /* Make the entry point to the current head and make the head point to it */
+ Entry->Next = ListHead->Next;
+ ListHead->Next = Entry;
+
+ /* Check if we had acquired a lock previously */
+ if (Lock)
+ {
+ /* Release it */
+ KeSetEvent(Lock, IO_NO_INCREMENT, FALSE);
+ KeLeaveCriticalRegion();
+ }
+}
+
+VOID
+NTAPI
+PcipLinkSecondaryExtension(IN PSINGLE_LIST_ENTRY List,
+ IN PVOID Lock,
+ IN PPCI_SECONDARY_EXTENSION SecondaryExtension,
+ IN PCI_SIGNATURE ExtensionType,
+ IN PVOID Destructor)
+{
+ PAGED_CODE();
+
+ /* Setup the extension data, and insert it into the primary's list */
+ SecondaryExtension->ExtensionType = ExtensionType;
+ SecondaryExtension->Destructor = Destructor;
+ PciInsertEntryAtHead(List, &SecondaryExtension->List, Lock);
+}
+
+NTSTATUS
+NTAPI
+PciGetDeviceProperty(IN PDEVICE_OBJECT DeviceObject,
+ IN DEVICE_REGISTRY_PROPERTY DeviceProperty,
+ OUT PVOID *OutputBuffer)
+{
+ NTSTATUS Status;
+ ULONG BufferLength, ResultLength;
+ PVOID Buffer;
+ do
+ {
+ /* Query the requested property size */
+ Status = IoGetDeviceProperty(DeviceObject,
+ DeviceProperty,
+ 0,
+ NULL,
+ &BufferLength);
+ if (Status != STATUS_BUFFER_TOO_SMALL)
+ {
+ /* Call should've failed with buffer too small! */
+ DPRINT1("PCI - Unexpected status from GetDeviceProperty, saw %08X, expected %08X.\n",
+ Status,
+ STATUS_BUFFER_TOO_SMALL);
+ *OutputBuffer = NULL;
+ ASSERTMSG(FALSE, "PCI Successfully did the impossible!");
+ break;
+ }
+
+ /* Allocate the required buffer */
+ Buffer = ExAllocatePoolWithTag(PagedPool, BufferLength, 'BicP');
+ if (!Buffer)
+ {
+ /* No memory, fail the request */
+ DPRINT1("PCI - Failed to allocate DeviceProperty buffer (%d bytes).\n", BufferLength);
+ Status = STATUS_INSUFFICIENT_RESOURCES;
+ break;
+ }
+
+ /* Do the actual property query call */
+ Status = IoGetDeviceProperty(DeviceObject,
+ DeviceProperty,
+ BufferLength,
+ Buffer,
+ &ResultLength);
+ if (!NT_SUCCESS(Status)) break;
+
+ /* Return the buffer to the caller */
+ ASSERT(BufferLength == ResultLength);
+ *OutputBuffer = Buffer;
+ return STATUS_SUCCESS;
+ } while (FALSE);
+
+ /* Failure path */
+ return STATUS_UNSUCCESSFUL;
+}
+
+NTSTATUS
+NTAPI
+PciSendIoctl(IN PDEVICE_OBJECT DeviceObject,
+ IN ULONG IoControlCode,
+ IN PVOID InputBuffer,
+ IN ULONG InputBufferLength,
+ IN PVOID OutputBuffer,
+ IN ULONG OutputBufferLength)
+{
+ PIRP Irp;
+ NTSTATUS Status;
+ KEVENT Event;
+ IO_STATUS_BLOCK IoStatusBlock;
+ PDEVICE_OBJECT AttachedDevice;
+ PAGED_CODE();
+
+ /* Initialize the pending IRP event */
+ KeInitializeEvent(&Event, SynchronizationEvent, FALSE);
+
+ /* Get a reference to the root PDO (ACPI) */
+ AttachedDevice = IoGetAttachedDeviceReference(DeviceObject);
+ if (!AttachedDevice) return STATUS_INVALID_PARAMETER;
+
+ /* Build the requested IOCTL IRP */
+ Irp = IoBuildDeviceIoControlRequest(IoControlCode,
+ AttachedDevice,
+ InputBuffer,
+ InputBufferLength,
+ OutputBuffer,
+ OutputBufferLength,
+ 0,
+ &Event,
+ &IoStatusBlock);
+ if (!Irp) return STATUS_INSUFFICIENT_RESOURCES;
+
+ /* Send the IOCTL to the driver */
+ Status = IoCallDriver(AttachedDevice, Irp);
+ if (Status == STATUS_PENDING)
+ {
+ /* Wait for a response */
+ KeWaitForSingleObject(&Event,
+ Executive,
+ KernelMode,
+ FALSE,
+ NULL);
+ Status = Irp->IoStatus.Status;
+ }
+
+ /* Take away the reference we took and return the result to the caller */
+ ObDereferenceObject(AttachedDevice);
+ return Status;
+}
+
projects / reactos.git / commitdiff