NTSTATUS
FilterAddDevice(
__in PDRIVER_OBJECT DriverObject,
__in PDEVICE_OBJECT PhysicalDeviceObject
)
/*++
Routine Description:
The Plug & Play subsystem is handing us a brand new PDO, for which we
(by means of INF registration) have been asked to provide a driver.
We need to determine if we need to be in the driver stack for the device.
Create a function device object to attach to the stack
Initialize that device object
Return status success.
Remember: We can NOT actually send ANY non pnp IRPS to the given driver
stack, UNTIL we have received an IRP_MN_START_DEVICE.
Arguments:
DeviceObject - pointer to a device object.
PhysicalDeviceObject - pointer to a device object created by the
underlying bus driver.
Return Value:
NT status code.
--*/
{
NTSTATUS status = STATUS_SUCCESS;
PDEVICE_OBJECT deviceObject = NULL;
PDEVICE_EXTENSION deviceExtension;
ULONG deviceType = FILE_DEVICE_UNKNOWN;
PAGED_CODE ();
//
// IoIsWdmVersionAvailable(1, 0x20) returns TRUE on os after Windows 2000.
//
if (RtlIsNtDdiVersionAvailable(NTDDI_WINXP)) {
//
// Win2K system bugchecks if the filter attached to a storage device
// doesn't specify the same DeviceType as the device it's attaching
// to. This bugcheck happens in the filesystem when you disable
// the devicestack whose top level deviceobject doesn't have a VPB.
// To workaround we will get the toplevel object's DeviceType and
// specify that in IoCreateDevice.
//
deviceObject = IoGetAttachedDeviceReference(PhysicalDeviceObject);
deviceType = deviceObject->DeviceType;
ObDereferenceObject(deviceObject);
}
//
// Create a filter device object.
//
status = IoCreateDevice (DriverObject,
sizeof (DEVICE_EXTENSION),
NULL, // No Name
deviceType,
FILE_DEVICE_SECURE_OPEN,
FALSE,
&deviceObject);
if (!NT_SUCCESS (status)) {
//
// Returning failure here prevents the entire stack from functioning,
// but most likely the rest of the stack will not be able to create
// device objects either, so it is still OK.
//
return status;
}
DebugPrint (("AddDevice PDO (0x%p) FDO (0x%p)\n",
PhysicalDeviceObject, deviceObject));
deviceExtension = (PDEVICE_EXTENSION) deviceObject->DeviceExtension;
deviceExtension->Common.Type = DEVICE_TYPE_FIDO;
deviceExtension->NextLowerDriver = IoAttachDeviceToDeviceStack (
deviceObject,
PhysicalDeviceObject);
//
// Failure for attachment is an indication of a broken plug & play system.
//
if (NULL == deviceExtension->NextLowerDriver) {
IoDeleteDevice(deviceObject);
return STATUS_UNSUCCESSFUL;
}
deviceObject->Flags |= deviceExtension->NextLowerDriver->Flags &
(DO_BUFFERED_IO | DO_DIRECT_IO |
DO_POWER_PAGABLE );
deviceObject->DeviceType = deviceExtension->NextLowerDriver->DeviceType;
deviceObject->Characteristics =
deviceExtension->NextLowerDriver->Characteristics;
deviceExtension->Self = deviceObject;
//
// Let us use remove lock to keep count of IRPs so that we don't
// deteach and delete our deviceobject until all pending I/Os in our
// devstack are completed. Remlock is required to protect us from
// various race conditions where our driver can get unloaded while we
// are still running dispatch or completion code.
//
IoInitializeRemoveLock (&deviceExtension->RemoveLock ,
POOL_TAG,
1, // MaxLockedMinutes
100); // HighWatermark, this parameter is
// used only on checked build. Specifies
// the maximum number of outstanding
// acquisitions allowed on the lock
//
// Set the initial state of the Filter DO
//
INITIALIZE_PNP_STATE(deviceExtension);
DebugPrint(("AddDevice: %p to %p->%p \n", deviceObject,
deviceExtension->NextLowerDriver,
PhysicalDeviceObject));
deviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
return STATUS_SUCCESS;
}
NTSTATUS
NTAPI
PopSetSystemPowerState(SYSTEM_POWER_STATE PowerState, POWER_ACTION PowerAction)
{
PDEVICE_OBJECT DeviceObject;
PDEVICE_OBJECT Fdo;
NTSTATUS Status;
DEVICETREE_TRAVERSE_CONTEXT Context;
POWER_STATE_TRAVERSE_CONTEXT PowerContext;
Status = IopGetSystemPowerDeviceObject(&DeviceObject);
if (!NT_SUCCESS(Status))
{
DPRINT1("No system power driver available\n");
Fdo = NULL;
}
else
{
Fdo = IoGetAttachedDeviceReference(DeviceObject);
if (Fdo == DeviceObject)
{
DPRINT("An FDO was not attached\n");
return STATUS_UNSUCCESSFUL;
}
}
/* Set up context */
PowerContext.PowerAction = PowerAction;
PowerContext.SystemPowerState = PowerState;
PowerContext.PowerDevice = Fdo;
/* Query for system power change */
IopInitDeviceTreeTraverseContext(&Context,
IopRootDeviceNode,
PopQuerySystemPowerStateTraverse,
&PowerContext);
Status = IopTraverseDeviceTree(&Context);
if (!NT_SUCCESS(Status))
{
DPRINT1("Query system power state failed; changing state anyway\n");
}
/* Set system power change */
IopInitDeviceTreeTraverseContext(&Context,
IopRootDeviceNode,
PopSetSystemPowerStateTraverse,
&PowerContext);
IopTraverseDeviceTree(&Context);
if (!PopAcpiPresent) return STATUS_NOT_IMPLEMENTED;
if (Fdo != NULL)
{
if (PowerAction != PowerActionShutdownReset)
PopSendSetSystemPowerState(Fdo, PowerState, PowerAction);
ObDereferenceObject(Fdo);
}
return Status;
}
/*
* @implemented
*/
VOID
IssueUniqueIdChangeNotify(IN PDEVICE_EXTENSION DeviceExtension,
IN PUNICODE_STRING DeviceName,
IN PMOUNTDEV_UNIQUE_ID UniqueId)
{
NTSTATUS Status;
PVOID IrpBuffer = NULL;
PFILE_OBJECT FileObject;
PDEVICE_OBJECT DeviceObject;
PUNIQUE_ID_WORK_ITEM WorkItem = NULL;
/* Get the associated device object */
Status = IoGetDeviceObjectPointer(DeviceName,
FILE_READ_ATTRIBUTES,
&FileObject,
&DeviceObject);
if (!NT_SUCCESS(Status))
{
return;
}
/* And then, get attached device */
DeviceObject = IoGetAttachedDeviceReference(FileObject->DeviceObject);
ObDereferenceObject(FileObject);
/* Allocate a work item */
WorkItem = AllocatePool(sizeof(UNIQUE_ID_WORK_ITEM));
if (!WorkItem)
{
ObDereferenceObject(DeviceObject);
return;
}
WorkItem->Event = NULL;
WorkItem->WorkItem = IoAllocateWorkItem(DeviceExtension->DeviceObject);
if (!WorkItem->WorkItem)
{
ObDereferenceObject(DeviceObject);
goto Cleanup;
}
WorkItem->DeviceExtension = DeviceExtension;
WorkItem->StackSize = DeviceObject->StackSize;
/* Already provide the IRP */
WorkItem->Irp = IoAllocateIrp(DeviceObject->StackSize, FALSE);
ObDereferenceObject(DeviceObject);
if (!WorkItem->Irp)
{
goto Cleanup;
}
/* Ensure it has enough space */
IrpBuffer = AllocatePool(sizeof(MOUNTDEV_UNIQUE_ID_CHANGE_NOTIFY_OUTPUT) + 1024);
if (!IrpBuffer)
{
goto Cleanup;
}
WorkItem->DeviceName.Length = DeviceName->Length;
WorkItem->DeviceName.MaximumLength = DeviceName->Length + sizeof(WCHAR);
WorkItem->DeviceName.Buffer = AllocatePool(WorkItem->DeviceName.MaximumLength);
if (!WorkItem->DeviceName.Buffer)
{
goto Cleanup;
}
RtlCopyMemory(WorkItem->DeviceName.Buffer, DeviceName->Buffer, DeviceName->Length);
WorkItem->DeviceName.Buffer[DeviceName->Length / sizeof(WCHAR)] = UNICODE_NULL;
WorkItem->IrpBuffer = IrpBuffer;
WorkItem->IrpBufferLength = sizeof(MOUNTDEV_UNIQUE_ID_CHANGE_NOTIFY_OUTPUT) + 1024;
/* Add the worker in the list */
KeWaitForSingleObject(&(DeviceExtension->DeviceLock), Executive, KernelMode, FALSE, NULL);
InsertHeadList(&(DeviceExtension->UniqueIdWorkerItemListHead), &(WorkItem->UniqueIdWorkerItemListEntry));
KeReleaseSemaphore(&(DeviceExtension->DeviceLock), IO_NO_INCREMENT, 1, FALSE);
/* And call the worker */
IssueUniqueIdChangeNotifyWorker(WorkItem, UniqueId);
return;
Cleanup:
if (IrpBuffer)
{
FreePool(IrpBuffer);
}
if (WorkItem->Irp)
{
IoFreeIrp(WorkItem->Irp);
}
if (WorkItem->WorkItem)
{
IoFreeWorkItem(WorkItem->WorkItem);
}
if (WorkItem)
{
FreePool(WorkItem);
}
}
NTSTATUS
Bus_GetDeviceCapabilities(
__in PDEVICE_OBJECT DeviceObject,
__in PDEVICE_CAPABILITIES DeviceCapabilities
)
/*++
Routine Description:
This routine sends the get capabilities irp to the given stack
Arguments:
DeviceObject A device object in the stack whose capabilities we want
DeviceCapabilites Where to store the answer
Return Value:
NTSTATUS
--*/
{
IO_STATUS_BLOCK ioStatus;
KEVENT pnpEvent;
NTSTATUS status;
PDEVICE_OBJECT targetObject;
PIO_STACK_LOCATION irpStack;
PIRP pnpIrp;
PAGED_CODE();
//
// Initialize the capabilities that we will send down
//
RtlZeroMemory( DeviceCapabilities, sizeof(DEVICE_CAPABILITIES) );
DeviceCapabilities->Size = sizeof(DEVICE_CAPABILITIES);
DeviceCapabilities->Version = 1;
DeviceCapabilities->Address = -1;
DeviceCapabilities->UINumber = -1;
//
// Initialize the event
//
KeInitializeEvent( &pnpEvent, NotificationEvent, FALSE );
targetObject = IoGetAttachedDeviceReference( DeviceObject );
//
// Build an Irp
//
pnpIrp = IoBuildSynchronousFsdRequest(
IRP_MJ_PNP,
targetObject,
NULL,
0,
NULL,
&pnpEvent,
&ioStatus
);
if (pnpIrp == NULL) {
status = STATUS_INSUFFICIENT_RESOURCES;
goto GetDeviceCapabilitiesExit;
}
//
// Pnp Irps all begin life as STATUS_NOT_SUPPORTED;
//
pnpIrp->IoStatus.Status = STATUS_NOT_SUPPORTED;
//
// Get the top of stack
//
irpStack = IoGetNextIrpStackLocation( pnpIrp );
//
// Set the top of stack
//
RtlZeroMemory( irpStack, sizeof(IO_STACK_LOCATION ) );
irpStack->MajorFunction = IRP_MJ_PNP;
irpStack->MinorFunction = IRP_MN_QUERY_CAPABILITIES;
irpStack->Parameters.DeviceCapabilities.Capabilities = DeviceCapabilities;
//
// Call the driver
//
status = IoCallDriver( targetObject, pnpIrp );
if (status == STATUS_PENDING) {
//
// Block until the irp comes back.
// Important thing to note here is when you allocate
// the memory for an event in the stack you must do a
// KernelMode wait instead of UserMode to prevent
// the stack from getting paged out.
//
KeWaitForSingleObject(
&pnpEvent,
Executive,
KernelMode,
FALSE,
NULL
);
status = ioStatus.Status;
}
GetDeviceCapabilitiesExit:
//
// Done with reference
//
ObDereferenceObject( targetObject );
//
// Done
//
return status;
}
/*
* @implemented
*/
VOID
IssueUniqueIdChangeNotifyWorker(IN PUNIQUE_ID_WORK_ITEM WorkItem,
IN PMOUNTDEV_UNIQUE_ID UniqueId)
{
PIRP Irp;
NTSTATUS Status;
PFILE_OBJECT FileObject;
PIO_STACK_LOCATION Stack;
PDEVICE_OBJECT DeviceObject;
/* Get the device object */
Status = IoGetDeviceObjectPointer(&(WorkItem->DeviceName),
FILE_READ_ATTRIBUTES,
&FileObject,
&DeviceObject);
if (!NT_SUCCESS(Status))
{
RemoveWorkItem(WorkItem);
return;
}
/* And then, the attached device */
DeviceObject = IoGetAttachedDeviceReference(FileObject->DeviceObject);
/* Initialize the IRP */
Irp = WorkItem->Irp;
IoInitializeIrp(Irp, IoSizeOfIrp(WorkItem->StackSize), (CCHAR)WorkItem->StackSize);
if (InterlockedExchange((PLONG)&(WorkItem->Event), 0) != 0)
{
ObDereferenceObject(FileObject);
ObDereferenceObject(DeviceObject);
RemoveWorkItem(WorkItem);
return;
}
Irp->AssociatedIrp.SystemBuffer = WorkItem->IrpBuffer;
Irp->Tail.Overlay.Thread = PsGetCurrentThread();
RtlCopyMemory(Irp->AssociatedIrp.SystemBuffer, UniqueId, UniqueId->UniqueIdLength + sizeof(USHORT));
Stack = IoGetNextIrpStackLocation(Irp);
Stack->Parameters.DeviceIoControl.InputBufferLength = UniqueId->UniqueIdLength + sizeof(USHORT);
Stack->Parameters.DeviceIoControl.OutputBufferLength = WorkItem->IrpBufferLength;
Stack->Parameters.DeviceIoControl.Type3InputBuffer = 0;
Stack->Parameters.DeviceIoControl.IoControlCode = IOCTL_MOUNTDEV_UNIQUE_ID_CHANGE_NOTIFY;
Stack->MajorFunction = IRP_MJ_DEVICE_CONTROL;
Status = IoSetCompletionRoutineEx(WorkItem->DeviceExtension->DeviceObject,
Irp,
UniqueIdChangeNotifyCompletion,
WorkItem,
TRUE, TRUE, TRUE);
if (!NT_SUCCESS(Status))
{
ObDereferenceObject(FileObject);
ObDereferenceObject(DeviceObject);
RemoveWorkItem(WorkItem);
return;
}
/* Call the driver */
IoCallDriver(DeviceObject, Irp);
ObDereferenceObject(FileObject);
ObDereferenceObject(DeviceObject);
}
/*
* @implemented
*/
VOID
MountMgrNotifyNameChange(IN PDEVICE_EXTENSION DeviceExtension,
IN PUNICODE_STRING DeviceName,
IN BOOLEAN ValidateVolume)
{
PIRP Irp;
KEVENT Event;
NTSTATUS Status;
PLIST_ENTRY NextEntry;
PFILE_OBJECT FileObject;
PIO_STACK_LOCATION Stack;
PDEVICE_OBJECT DeviceObject;
IO_STATUS_BLOCK IoStatusBlock;
PDEVICE_RELATIONS DeviceRelations;
PDEVICE_INFORMATION DeviceInformation;
TARGET_DEVICE_CUSTOM_NOTIFICATION DeviceNotification;
/* If we have to validate volume */
if (ValidateVolume)
{
/* Then, ensure we can find the device */
NextEntry = DeviceExtension->DeviceListHead.Flink;
while (NextEntry != &(DeviceExtension->DeviceListHead))
{
DeviceInformation = CONTAINING_RECORD(NextEntry, DEVICE_INFORMATION, DeviceListEntry);
if (RtlCompareUnicodeString(DeviceName, &(DeviceInformation->DeviceName), TRUE) == 0)
{
break;
}
}
/* No need to notify for a PnP device or if we didn't find the device */
if (NextEntry == &(DeviceExtension->DeviceListHead) ||
!DeviceInformation->ManuallyRegistered)
{
return;
}
}
/* Then, get device object */
Status = IoGetDeviceObjectPointer(DeviceName,
FILE_READ_ATTRIBUTES,
&FileObject,
&DeviceObject);
if (!NT_SUCCESS(Status))
{
return;
}
DeviceObject = IoGetAttachedDeviceReference(FileObject->DeviceObject);
KeInitializeEvent(&Event, NotificationEvent, FALSE);
/* Set up empty IRP (yes, yes!) */
Irp = IoBuildDeviceIoControlRequest(0,
DeviceObject,
NULL,
0,
NULL,
0,
FALSE,
&Event,
&IoStatusBlock);
if (!Irp)
{
ObDereferenceObject(DeviceObject);
ObDereferenceObject(FileObject);
return;
}
Stack = IoGetNextIrpStackLocation(Irp);
Irp->IoStatus.Status = STATUS_NOT_SUPPORTED;
Irp->IoStatus.Information = 0;
/* Properly set it, we want to query device relations */
Stack->MajorFunction = IRP_MJ_PNP;
Stack->MinorFunction = IRP_MN_QUERY_DEVICE_RELATIONS;
Stack->Parameters.QueryDeviceRelations.Type = TargetDeviceRelation;
Stack->FileObject = FileObject;
/* And call driver */
Status = IoCallDriver(DeviceObject, Irp);
if (Status == STATUS_PENDING)
{
KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
Status = IoStatusBlock.Status;
}
ObDereferenceObject(DeviceObject);
ObDereferenceObject(FileObject);
if (!NT_SUCCESS(Status))
{
return;
}
/* Validate device return */
DeviceRelations = (PDEVICE_RELATIONS)IoStatusBlock.Information;
if (DeviceRelations->Count < 1)
{
ExFreePool(DeviceRelations);
return;
}
DeviceObject = DeviceRelations->Objects[0];
ExFreePool(DeviceRelations);
/* Set up real notification */
DeviceNotification.Version = 1;
DeviceNotification.Size = sizeof(TARGET_DEVICE_CUSTOM_NOTIFICATION);
DeviceNotification.Event = GUID_IO_VOLUME_NAME_CHANGE;
DeviceNotification.FileObject = NULL;
DeviceNotification.NameBufferOffset = -1;
/* And report */
IoReportTargetDeviceChangeAsynchronous(DeviceObject,
&DeviceNotification,
NULL, NULL);
ObDereferenceObject(DeviceObject);
return;
}
static FORCEINLINE NTSTATUS
__DriverQueryId(
IN PDEVICE_OBJECT PhysicalDeviceObject,
IN BUS_QUERY_ID_TYPE IdType,
OUT PVOID *Information
)
{
PDEVICE_OBJECT DeviceObject;
PIRP Irp;
KEVENT Event;
PIO_STACK_LOCATION StackLocation;
NTSTATUS status;
ASSERT3U(KeGetCurrentIrql(), ==, PASSIVE_LEVEL);
DeviceObject = IoGetAttachedDeviceReference(PhysicalDeviceObject);
Irp = IoAllocateIrp(DeviceObject->StackSize, FALSE);
status = STATUS_INSUFFICIENT_RESOURCES;
if (Irp == NULL)
goto fail1;
StackLocation = IoGetNextIrpStackLocation(Irp);
StackLocation->MajorFunction = IRP_MJ_PNP;
StackLocation->MinorFunction = IRP_MN_QUERY_ID;
StackLocation->Flags = 0;
StackLocation->Parameters.QueryId.IdType = IdType;
StackLocation->DeviceObject = DeviceObject;
StackLocation->FileObject = NULL;
KeInitializeEvent(&Event, NotificationEvent, FALSE);
IoSetCompletionRoutine(Irp,
DriverQueryIdCompletion,
&Event,
TRUE,
TRUE,
TRUE);
// Default completion status
Irp->IoStatus.Status = STATUS_NOT_SUPPORTED;
status = IoCallDriver(DeviceObject, Irp);
if (status == STATUS_PENDING) {
(VOID) KeWaitForSingleObject(&Event,
Executive,
KernelMode,
FALSE,
NULL);
status = Irp->IoStatus.Status;
} else {
ASSERT3U(status, ==, Irp->IoStatus.Status);
}
if (!NT_SUCCESS(status))
goto fail2;
*Information = (PVOID)Irp->IoStatus.Information;
IoFreeIrp(Irp);
ObDereferenceObject(DeviceObject);
return STATUS_SUCCESS;
fail2:
Error("fail2\n");
IoFreeIrp(Irp);
fail1:
Error("fail1 (%08x)\n", status);
ObDereferenceObject(DeviceObject);
return status;
}
NTSTATUS
NTAPI
PciQueryForPciBusInterface(IN PPCI_FDO_EXTENSION FdoExtension)
{
PDEVICE_OBJECT AttachedDevice;
IO_STATUS_BLOCK IoStatusBlock;
KEVENT Event;
NTSTATUS Status;
PIRP Irp;
PIO_STACK_LOCATION IoStackLocation;
PPCI_BUS_INTERFACE_STANDARD PciInterface;
PAGED_CODE();
ASSERT(PCI_IS_ROOT_FDO(FdoExtension));
/* Allocate space for the inteface */
PciInterface = ExAllocatePoolWithTag(NonPagedPool,
sizeof(PCI_BUS_INTERFACE_STANDARD),
PCI_POOL_TAG);
if (!PciInterface) return STATUS_INSUFFICIENT_RESOURCES;
/* Get the device the PDO is attached to, should be the Root (ACPI) */
AttachedDevice = IoGetAttachedDeviceReference(FdoExtension->PhysicalDeviceObject);
/* Build an IRP for this request */
KeInitializeEvent(&Event, SynchronizationEvent, FALSE);
Irp = IoBuildSynchronousFsdRequest(IRP_MJ_PNP,
AttachedDevice,
NULL,
0,
NULL,
&Event,
&IoStatusBlock);
if (Irp)
{
/* Initialize the default PnP response */
Irp->IoStatus.Status = STATUS_NOT_SUPPORTED;
Irp->IoStatus.Information = 0;
/* Make it a Query Interface IRP */
IoStackLocation = IoGetNextIrpStackLocation(Irp);
ASSERT(IoStackLocation->MajorFunction == IRP_MJ_PNP);
IoStackLocation->MinorFunction = IRP_MN_QUERY_INTERFACE;
IoStackLocation->Parameters.QueryInterface.InterfaceType = &GUID_PCI_BUS_INTERFACE_STANDARD;
IoStackLocation->Parameters.QueryInterface.Size = sizeof(GUID_PCI_BUS_INTERFACE_STANDARD);
IoStackLocation->Parameters.QueryInterface.Version = PCI_BUS_INTERFACE_STANDARD_VERSION;
IoStackLocation->Parameters.QueryInterface.Interface = (PINTERFACE)PciInterface;
IoStackLocation->Parameters.QueryInterface.InterfaceSpecificData = NULL;
/* Send it to the root PDO */
Status = IoCallDriver(AttachedDevice, Irp);
if (Status == STATUS_PENDING)
{
/* Wait for completion */
KeWaitForSingleObject(&Event,
Executive,
KernelMode,
FALSE,
NULL);
Status = Irp->IoStatus.Status;
}
/* Check if an interface was returned */
if (!NT_SUCCESS(Status))
{
/* No interface was returned by the root PDO */
FdoExtension->PciBusInterface = NULL;
ExFreePoolWithTag(PciInterface, 0);
}
else
{
/* An interface was returned, save it */
FdoExtension->PciBusInterface = PciInterface;
}
/* Dereference the device object because we took a reference earlier */
ObfDereferenceObject(AttachedDevice);
}
else
{
/* Failure path, dereference the device object and set failure code */
if (AttachedDevice) ObfDereferenceObject(AttachedDevice);
ExFreePoolWithTag(PciInterface, 0);
Status = STATUS_INSUFFICIENT_RESOURCES;
}
/* Return status code to caller */
return Status;
}
VOID
FxPkgPnp::QueryForD3ColdInterface(
VOID
)
{
MxDeviceObject deviceObject;
PDEVICE_OBJECT topOfStack;
PDEVICE_OBJECT pdo;
FxAutoIrp irp;
NTSTATUS status;
//
// This function can be invoked multiple times, particularly if filters
// send IRP_MN_QUERY_CAPABILITIES. So bail out if the interface has already
// been acquired.
//
if ((m_D3ColdInterface.InterfaceDereference != NULL) ||
(m_D3ColdInterface.GetIdleWakeInfo != NULL) ||
(m_D3ColdInterface.SetD3ColdSupport != NULL)) {
return;
}
pdo = m_Device->GetPhysicalDevice();
if (pdo == NULL) {
return;
}
//
// Get the top of stack device object, even though normal filters and the
// FDO may not have been added to the stack yet to ensure that this
// query-interface is seen by bus filters. Specifically, in a PCI device
// which is soldered to the motherboard, ACPI will be on the stack and it
// needs to see this IRP.
//
topOfStack = IoGetAttachedDeviceReference(pdo);
deviceObject.SetObject(topOfStack);
if (deviceObject.GetObject() != NULL) {
irp.SetIrp(FxIrp::AllocateIrp(deviceObject.GetStackSize()));
if (irp.GetIrp() == NULL) {
DoTraceLevelMessage(
GetDriverGlobals(), TRACE_LEVEL_ERROR, TRACINGPNP,
"Failed to allocate IRP to get D3COLD_SUPPORT_INTERFACE from !devobj %p",
pdo);
} else {
//
// Initialize the Irp
//
irp.SetStatus(STATUS_NOT_SUPPORTED);
irp.ClearNextStack();
irp.SetMajorFunction(IRP_MJ_PNP);
irp.SetMinorFunction(IRP_MN_QUERY_INTERFACE);
irp.SetParameterQueryInterfaceType(&GUID_D3COLD_SUPPORT_INTERFACE);
irp.SetParameterQueryInterfaceVersion(D3COLD_SUPPORT_INTERFACE_VERSION);
irp.SetParameterQueryInterfaceSize(sizeof(m_D3ColdInterface));
irp.SetParameterQueryInterfaceInterfaceSpecificData(NULL);
irp.SetParameterQueryInterfaceInterface((PINTERFACE)&m_D3ColdInterface);
status = irp.SendIrpSynchronously(deviceObject.GetObject());
if (!NT_SUCCESS(status)) {
DoTraceLevelMessage(
GetDriverGlobals(), TRACE_LEVEL_VERBOSE, TRACINGPNP,
"!devobj %p declined to supply D3COLD_SUPPORT_INTERFACE",
pdo);
RtlZeroMemory(&m_D3ColdInterface, sizeof(m_D3ColdInterface));
}
}
}
ObDereferenceObject(topOfStack);
}