VBoxGuestPnP.cpp@ 30931

Last change on this file since 30931 was 30201, checked in by vboxsync, 15 years ago
Clean up balloon in pnp remove device as well
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 22.9 KB

Line
1	/** @file
2	*
3	* VBoxGuest -- VirtualBox Win32 guest support driver PnP code
4	*
5	* Copyright (C) 2006-2007 Oracle Corporation
6	*
7	* This file is part of VirtualBox Open Source Edition (OSE), as
8	* available from http://www.virtualbox.org. This file is free software;
9	* you can redistribute it and/or modify it under the terms of the GNU
10	* General Public License (GPL) as published by the Free Software
11	* Foundation, in version 2 as it comes in the "COPYING" file of the
12	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
13	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
14	*/
15
16	// enable backdoor logging
17	//#define LOG_ENABLED
18
19	/*******************************************************************************
20	* Header Files *
21	*******************************************************************************/
22	#include "VBoxGuestPnP.h"
23	#include "Helper.h"
24	#include <VBox/err.h>
25
26	#include <VBox/VBoxGuestLib.h>
27
28	/*******************************************************************************
29	* Defined Constants And Macros *
30	*******************************************************************************/
31
32
33	extern "C"
34	{
35	static NTSTATUS sendIrpSynchronously(PDEVICE_OBJECT pDevObj, PIRP pIrp, BOOLEAN fStrict);
36	static NTSTATUS pnpIrpComplete(PDEVICE_OBJECT pDevObj, PIRP pIrp, PKEVENT event);
37	static VOID showDeviceResources(PCM_PARTIAL_RESOURCE_LIST pResourceList);
38	}
39
40	#ifdef ALLOC_PRAGMA
41	#pragma alloc_text (PAGE, VBoxGuestPnP)
42	#pragma alloc_text (PAGE, VBoxGuestPower)
43	#pragma alloc_text (PAGE, sendIrpSynchronously)
44	#pragma alloc_text (PAGE, showDeviceResources)
45	#endif
46
47	/* reenable logging, this was #undef'ed on iprt/log.h for RING0 */
48	#define LOG_ENABLED
49
50	/*******************************************************************************
51	* Internal Functions *
52	*******************************************************************************/
53
54	/**
55	* Irp completion routine for PnP Irps we send.
56	*
57	* @param pDevObj Device object.
58	* @param pIrp Request packet.
59	* @param event Semaphore.
60	* @return NT status code
61	*/
62	static NTSTATUS pnpIrpComplete(PDEVICE_OBJECT pDevObj, PIRP pIrp, PKEVENT event)
63	{
64	KeSetEvent(event, 0, FALSE);
65	return STATUS_MORE_PROCESSING_REQUIRED;
66	}
67
68	/**
69	* Helper to send a PnP IRP and wait until it's done.
70	*
71	* @param pDevObj Device object.
72	* @param pIrp Request packet.
73	* @param fStrict When set, returns an error if the IRP gives an error.
74	* @return NT status code
75	*/
76	static NTSTATUS sendIrpSynchronously(PDEVICE_OBJECT pDevObj, PIRP pIrp, BOOLEAN fStrict)
77	{
78	KEVENT event;
79
80	KeInitializeEvent(&event, SynchronizationEvent, FALSE);
81
82	IoCopyCurrentIrpStackLocationToNext(pIrp);
83	IoSetCompletionRoutine(pIrp, (PIO_COMPLETION_ROUTINE)pnpIrpComplete, &event, TRUE, TRUE, TRUE);
84
85	NTSTATUS rc = IoCallDriver(pDevObj, pIrp);
86
87	if (rc == STATUS_PENDING)
88	{
89	KeWaitForSingleObject(&event, Executive, KernelMode, FALSE, NULL);
90	rc = pIrp->IoStatus.Status;
91	}
92
93	if (!fStrict
94	&& (rc == STATUS_NOT_SUPPORTED \|\| rc == STATUS_INVALID_DEVICE_REQUEST))
95	{
96	rc = STATUS_SUCCESS;
97	}
98
99	dprintf(("VBoxGuest::sendIrpSynchronously: returning 0x%x\n", rc));
100
101	return rc;
102	}
103
104
105	/**
106	* PnP Request handler.
107	*
108	* @param pDevObj Device object.
109	* @param pIrp Request packet.
110	*/
111	NTSTATUS VBoxGuestPnP(PDEVICE_OBJECT pDevObj, PIRP pIrp)
112	{
113	PVBOXGUESTDEVEXT pDevExt = (PVBOXGUESTDEVEXT)pDevObj->DeviceExtension;
114	PIO_STACK_LOCATION pStack = IoGetCurrentIrpStackLocation(pIrp);
115	NTSTATUS rc = STATUS_SUCCESS;
116
117	#ifdef LOG_ENABLED
118	static char* fcnname[] =
119	{
120	"IRP_MN_START_DEVICE",
121	"IRP_MN_QUERY_REMOVE_DEVICE",
122	"IRP_MN_REMOVE_DEVICE",
123	"IRP_MN_CANCEL_REMOVE_DEVICE",
124	"IRP_MN_STOP_DEVICE",
125	"IRP_MN_QUERY_STOP_DEVICE",
126	"IRP_MN_CANCEL_STOP_DEVICE",
127	"IRP_MN_QUERY_DEVICE_RELATIONS",
128	"IRP_MN_QUERY_INTERFACE",
129	"IRP_MN_QUERY_CAPABILITIES",
130	"IRP_MN_QUERY_RESOURCES",
131	"IRP_MN_QUERY_RESOURCE_REQUIREMENTS",
132	"IRP_MN_QUERY_DEVICE_TEXT",
133	"IRP_MN_FILTER_RESOURCE_REQUIREMENTS",
134	"",
135	"IRP_MN_READ_CONFIG",
136	"IRP_MN_WRITE_CONFIG",
137	"IRP_MN_EJECT",
138	"IRP_MN_SET_LOCK",
139	"IRP_MN_QUERY_ID",
140	"IRP_MN_QUERY_PNP_DEVICE_STATE",
141	"IRP_MN_QUERY_BUS_INFORMATION",
142	"IRP_MN_DEVICE_USAGE_NOTIFICATION",
143	"IRP_MN_SURPRISE_REMOVAL",
144	};
145	dprintf(("VBoxGuest::VBoxGuestPnp: MinorFunction: %s\n", pStack->MinorFunction < (sizeof(fcnname)/sizeof(fcnname[0])) ? fcnname[pStack->MinorFunction] : "unknown"));
146	#endif
147	switch (pStack->MinorFunction)
148	{
149	case IRP_MN_START_DEVICE:
150	{
151	rc = sendIrpSynchronously(pDevExt->nextLowerDriver, pIrp, TRUE);
152
153	if (NT_SUCCESS(rc) && NT_SUCCESS(pIrp->IoStatus.Status))
154	{
155	dprintf(("VBoxGuest::START_DEVICE: pStack->Parameters.StartDevice.AllocatedResources = %p\n", pStack->Parameters.StartDevice.AllocatedResources));
156
157	if (!pStack->Parameters.StartDevice.AllocatedResources)
158	{
159	dprintf(("VBoxGuest::START_DEVICE: no resources, pDevExt = %p, nextLowerDriver = %p!!!\n", pDevExt, pDevExt? pDevExt->nextLowerDriver: NULL));
160	rc = STATUS_UNSUCCESSFUL;
161	}
162	else
163	{
164	showDeviceResources(&pStack->Parameters.StartDevice.AllocatedResources->List[0].PartialResourceList);
165
166	VBoxScanPCIResourceList(pStack->Parameters.StartDevice.AllocatedResourcesTranslated,
167	pDevExt);
168
169	/** @todo cleanup and merging codepath with NT */
170	int rcVBox;
171	rcVBox = VbglInit (pDevExt->startPortAddress, pDevExt->pVMMDevMemory);
172	if (!RT_SUCCESS(rcVBox))
173	{
174	dprintf(("VBoxGuest::START_DEVICE: VbglInit failed. rcVBox = %d\n", rcVBox));
175	rc = STATUS_UNSUCCESSFUL;
176	}
177
178	if (NT_SUCCESS(rc))
179	{
180	rcVBox = VbglGRAlloc ((VMMDevRequestHeader **)&pDevExt->irqAckEvents, sizeof (VMMDevEvents), VMMDevReq_AcknowledgeEvents);
181	if (!RT_SUCCESS(rc))
182	{
183	dprintf(("VBoxGuest::START_DEVICE: VbglAlloc failed for irqAckEvents. rcVBox = %d\n", rcVBox));
184	rc = STATUS_UNSUCCESSFUL;
185	}
186	}
187
188	if (NT_SUCCESS(rc))
189	{
190	rcVBox = VbglGRAlloc ((VMMDevRequestHeader **)&pDevExt->powerStateRequest, sizeof (VMMDevPowerStateRequest), VMMDevReq_SetPowerStatus);
191	if (!RT_SUCCESS(rc))
192	{
193	dprintf(("VBoxGuest::START_DEVICE: VbglAlloc failed for powerStateRequest. rcVBox = %d\n", rcVBox));
194	rc = STATUS_UNSUCCESSFUL;
195	}
196	}
197
198	if (NT_SUCCESS(rc))
199	{
200	// Map physical address of VMMDev memory
201	rc = hlpVBoxMapVMMDevMemory(pDevExt);
202	if (!NT_SUCCESS(rc))
203	{
204	dprintf(("VBoxGuest::START_DEVICE: can't map physical memory, rc = %d\n", rc));
205	}
206	}
207
208	if (NT_SUCCESS(rc))
209	{
210	rc = hlpVBoxReportGuestInfo (pDevExt);
211	if (!NT_SUCCESS(rc))
212	{
213	dprintf(("VBoxGuest::START_DEVICE: could not report information to host, rc = %d\n", rc));
214	}
215	}
216
217	if (NT_SUCCESS(rc))
218	{
219	// register DPC and ISR
220	dprintf(("VBoxGuest::VBoxGuestPnp: initializing DPC...\n"));
221	IoInitializeDpcRequest(pDevExt->deviceObject, VBoxGuestDpcHandler);
222
223	rc = IoConnectInterrupt(&pDevExt->interruptObject, // out: interrupt object
224	(PKSERVICE_ROUTINE)VBoxGuestIsrHandler, // ISR
225	pDevExt, // context
226	NULL, // optional spinlock
227	pDevExt->interruptVector, // interrupt vector
228	(KIRQL)pDevExt->interruptLevel, // interrupt level
229	(KIRQL)pDevExt->interruptLevel, // interrupt level
230	pDevExt->interruptMode, // LevelSensitive or Latched
231	TRUE, // shareable interrupt
232	pDevExt->interruptAffinity, // CPU affinity
233	FALSE); // don't save FPU stack
234	if (!NT_SUCCESS(rc))
235	{
236	dprintf(("VBoxGuest::VBoxGuestPnp: could not connect interrupt: rc = 0x%x\n", rc));
237	}
238	}
239	}
240	}
241	if (NT_SUCCESS(rc))
242	{
243	createThreads(pDevExt);
244
245	// initialize the event notification semaphore
246	KeInitializeEvent(&pDevExt->keventNotification, NotificationEvent, FALSE);
247
248	/* Preallocated constant timeout 250ms for HGCM async waiter. */
249	pDevExt->HGCMWaitTimeout.QuadPart = 250;
250	pDevExt->HGCMWaitTimeout.QuadPart = -10000; / relative in 100ns units */
251
252	VBoxInitMemBalloon(pDevExt);
253
254	// ready to rumble!
255	dprintf(("VBoxGuest::VBoxGuestPnp: device is ready!\n"));
256	pDevExt->devState = WORKING;
257	} else
258	{
259	dprintf(("VBoxGuest::VBoxGuestPnp: error: rc = 0x%x\n", rc));
260
261	// need to unmap memory in case of errors
262	hlpVBoxUnmapVMMDevMemory (pDevExt);
263	}
264	pIrp->IoStatus.Status = rc;
265	pIrp->IoStatus.Information = 0;
266	IoCompleteRequest(pIrp, IO_NO_INCREMENT);
267	break;
268	}
269
270	case IRP_MN_QUERY_REMOVE_DEVICE:
271	{
272	#ifdef VBOX_REBOOT_ON_UNINSTALL
273	/* The device can not be removed without a reboot. */
274	if (pDevExt->devState == WORKING)
275	{
276	pDevExt->devState = PENDINGREMOVE;
277	}
278	pIrp->IoStatus.Status = STATUS_UNSUCCESSFUL;
279	pIrp->IoStatus.Information = 0;
280	IoCompleteRequest(pIrp, IO_NO_INCREMENT);
281	rc = STATUS_UNSUCCESSFUL;
282
283	dprintf(("VBoxGuest::VBoxGuestPnp: refuse with rc = %p\n", pIrp->IoStatus.Status));
284	#else
285	pIrp->IoStatus.Status = STATUS_SUCCESS;
286	if (pDevExt->devState == WORKING)
287	{
288	pDevExt->devState = PENDINGREMOVE;
289	}
290	IoSkipCurrentIrpStackLocation(pIrp);
291	rc = IoCallDriver(pDevExt->nextLowerDriver, pIrp);
292	#endif /* VBOX_REBOOT_ON_UNINSTALL */
293	break;
294	}
295
296	case IRP_MN_REMOVE_DEVICE:
297	{
298	/* @todo merge Remove and Stop, make a helper for common actions */
299	pIrp->IoStatus.Status = STATUS_SUCCESS;
300
301	unreserveHypervisorMemory(pDevExt);
302
303	if (pDevExt->workerThread)
304	{
305	dprintf(("VBoxGuest::VBoxGuestPnp: waiting for the worker thread to terminate...\n"));
306	pDevExt->stopThread = TRUE;
307	KeSetEvent(&pDevExt->workerThreadRequest, 0, FALSE);
308	KeWaitForSingleObject(pDevExt->workerThread,
309	Executive, KernelMode, FALSE, NULL);
310	dprintf(("VBoxGuest::VBoxGuestPnp: returned from KeWaitForSingleObject for worker thread\n"));
311	}
312
313	if (pDevExt->idleThread)
314	{
315	dprintf(("VBoxGuest::VBoxGuestPnp: waiting for the idle thread to terminate...\n"));
316	pDevExt->stopThread = TRUE;
317	KeWaitForSingleObject(pDevExt->idleThread,
318	Executive, KernelMode, FALSE, NULL);
319	dprintf(("VBoxGuest::VBoxGuestPnp: returned from KeWaitForSingleObject for idle thread\n"));
320	}
321
322	VbglTerminate ();
323
324	// according to MSDN we have to unmap previously mapped memory
325	hlpVBoxUnmapVMMDevMemory (pDevExt);
326
327	/* Free the memory balloon (if any) */
328	VBoxCleanupMemBalloon(pDevExt);
329
330	if (pDevExt->nextLowerDriver != NULL)
331	{
332	IoDetachDevice(pDevExt->nextLowerDriver);
333	}
334
335	#ifdef VBOX_WITH_HGCM
336	if (pDevExt->SessionSpinlock != NIL_RTSPINLOCK)
337	RTSpinlockDestroy(pDevExt->SessionSpinlock);
338	#endif
339
340	UNICODE_STRING win32Name;
341	RtlInitUnicodeString(&win32Name, VBOXGUEST_DEVICE_NAME_DOS);
342	IoDeleteSymbolicLink(&win32Name);
343	IoDeleteDevice(pDevObj);
344	pDevExt->devState = REMOVED;
345	IoSkipCurrentIrpStackLocation(pIrp);
346	rc = IoCallDriver(pDevExt->nextLowerDriver, pIrp);
347	break;
348	}
349
350	case IRP_MN_QUERY_STOP_DEVICE:
351	{
352	#ifdef VBOX_REBOOT_ON_UNINSTALL
353	dprintf(("VBoxGuest::VBoxGuestPnp: refuse\n"));
354	/* The device can not be stopped without a reboot. */
355	if (pDevExt->devState == WORKING)
356	{
357	pDevExt->devState = PENDINGSTOP;
358	}
359	pIrp->IoStatus.Status = STATUS_UNSUCCESSFUL;
360	IoCompleteRequest(pIrp, IO_NO_INCREMENT);
361	rc = STATUS_UNSUCCESSFUL;
362	#else
363	pIrp->IoStatus.Status = STATUS_SUCCESS;
364	if (pDevExt->devState == WORKING)
365	{
366	pDevExt->devState = PENDINGSTOP;
367	}
368	IoSkipCurrentIrpStackLocation(pIrp);
369	rc = IoCallDriver(pDevExt->nextLowerDriver, pIrp);
370	#endif /* VBOX_REBOOT_ON_UNINSTALL */
371	break;
372	}
373
374	case IRP_MN_STOP_DEVICE:
375	{
376	pIrp->IoStatus.Status = STATUS_SUCCESS;
377	if (pDevExt->devState == PENDINGSTOP)
378	{
379	VbglTerminate ();
380
381	// according to MSDN we have to unmap previously mapped memory
382	hlpVBoxUnmapVMMDevMemory (pDevExt);
383
384	pDevExt->devState = STOPPED;
385	dprintf(("VBoxGuest::VBoxGuestPnp: device has been disabled\n"));
386	} else
387	{
388	dprintf(("VBoxGuest::VBoxGuestPnp: devState not PENDINGSTOP but %d\n", pDevExt->devState));
389	}
390	IoSkipCurrentIrpStackLocation(pIrp);
391	rc = IoCallDriver(pDevExt->nextLowerDriver, pIrp);
392	break;
393	}
394
395	default:
396	{
397	IoSkipCurrentIrpStackLocation(pIrp);
398	rc = IoCallDriver(pDevExt->nextLowerDriver, pIrp);
399	}
400
401	}
402	return rc;
403	}
404
405
406	/**
407	* Debug helper to dump a device resource list.
408	*
409	* @param pResourceList list of device resources.
410	*/
411	static VOID showDeviceResources(PCM_PARTIAL_RESOURCE_LIST pResourceList)
412	{
413	#ifdef LOG_ENABLED
414	PCM_PARTIAL_RESOURCE_DESCRIPTOR resource = pResourceList->PartialDescriptors;
415	ULONG nres = pResourceList->Count;
416	ULONG i;
417
418	for (i = 0; i < nres; ++i, ++resource)
419	{
420	ULONG type = resource->Type;
421
422	static char* name[] =
423	{
424	"CmResourceTypeNull",
425	"CmResourceTypePort",
426	"CmResourceTypeInterrupt",
427	"CmResourceTypeMemory",
428	"CmResourceTypeDma",
429	"CmResourceTypeDeviceSpecific",
430	"CmResourceTypeBusNumber",
431	"CmResourceTypeDevicePrivate",
432	"CmResourceTypeAssignedResource",
433	"CmResourceTypeSubAllocateFrom",
434	};
435
436	dprintf(("VBoxGuest::showDeviceResources: type %s", type < (sizeof(name)/sizeof(name[0])) ? name[type] : "unknown"));
437
438	switch (type)
439	{
440	case CmResourceTypePort:
441	case CmResourceTypeMemory:
442	dprintf(("VBoxGuest::showDeviceResources: start %8X%8.8lX length %X\n",
443	resource->u.Port.Start.HighPart, resource->u.Port.Start.LowPart,
444	resource->u.Port.Length));
445	break;
446
447	case CmResourceTypeInterrupt:
448	dprintf(("VBoxGuest::showDeviceResources: level %X, vector %X, affinity %X\n",
449	resource->u.Interrupt.Level, resource->u.Interrupt.Vector,
450	resource->u.Interrupt.Affinity));
451	break;
452
453	case CmResourceTypeDma:
454	dprintf(("VBoxGuest::showDeviceResources: channel %d, port %X\n",
455	resource->u.Dma.Channel, resource->u.Dma.Port));
456	break;
457
458	default:
459	dprintf(("\n"));
460	break;
461	}
462	}
463	#endif
464	}
465
466	/**
467	* Handle the power completion event.
468	*
469	* @returns NT status code
470	* @param devObj targetted device object
471	* @param irp IO request packet
472	* @param context context value passed to IoSetCompletionRoutine in VBoxGuestPower
473	*/
474	NTSTATUS VBoxGuestPowerComplete(IN PDEVICE_OBJECT devObj,
475	IN PIRP irp, IN PVOID context)
476	{
477	PIO_STACK_LOCATION irpSp;
478	PVBOXGUESTDEVEXT devExt = (PVBOXGUESTDEVEXT)context;
479
480	ASSERT(devExt);
481	ASSERT(devExt->signature == DEVICE_EXTENSION_SIGNATURE);
482
483	irpSp = IoGetCurrentIrpStackLocation(irp);
484	ASSERT(irpSp->MajorFunction == IRP_MJ_POWER);
485
486	if (NT_SUCCESS(irp->IoStatus.Status))
487	{
488	switch (irpSp->MinorFunction)
489	{
490	case IRP_MN_SET_POWER:
491
492	switch (irpSp->Parameters.Power.Type)
493	{
494	case DevicePowerState:
495	switch (irpSp->Parameters.Power.State.DeviceState)
496	{
497	case PowerDeviceD0:
498	break;
499	}
500	break;
501	}
502	break;
503	}
504	}
505
506	return STATUS_SUCCESS;
507	}
508
509
510	/**
511	* Handle the Power requests.
512	*
513	* @returns NT status code
514	* @param pDevObj device object
515	* @param pIrp IRP
516	*/
517	NTSTATUS VBoxGuestPower(PDEVICE_OBJECT pDevObj, PIRP pIrp)
518	{
519	PIO_STACK_LOCATION pStack = IoGetCurrentIrpStackLocation(pIrp);
520	PVBOXGUESTDEVEXT pDevExt = (PVBOXGUESTDEVEXT)pDevObj->DeviceExtension;
521	POWER_STATE_TYPE powerType;
522	POWER_STATE powerState;
523	POWER_ACTION powerAction;
524
525	dprintf(("VBoxGuest::VBoxGuestPower\n"));
526
527	powerType = pStack->Parameters.Power.Type;
528	powerAction = pStack->Parameters.Power.ShutdownType;
529	powerState = pStack->Parameters.Power.State;
530
531	switch (pStack->MinorFunction)
532	{
533	case IRP_MN_SET_POWER:
534	{
535	dprintf(("VBoxGuest::VBoxGuestPower: IRP_MN_SET_POWER\n"));
536	switch (powerType)
537	{
538	case SystemPowerState:
539	{
540	dprintf(("VBoxGuest::VBoxGuestPower: SystemPowerState\n"));
541	switch (powerAction)
542	{
543	case PowerActionShutdownReset:
544	{
545	dprintf(("VBoxGuest::VBoxGuestPower: power action reset!\n"));
546	/* tell the VMM that we no longer support mouse pointer integration */
547
548	VMMDevReqMouseStatus *req = NULL;
549
550	int rc = VbglGRAlloc ((VMMDevRequestHeader **)&req, sizeof (VMMDevReqMouseStatus), VMMDevReq_SetMouseStatus);
551
552	if (RT_SUCCESS(rc))
553	{
554	req->mouseFeatures = 0;
555	req->pointerXPos = 0;
556	req->pointerYPos = 0;
557
558	rc = VbglGRPerform (&req->header);
559
560	if (RT_FAILURE(rc))
561	{
562	dprintf(("VBoxGuest::PowerStateRequest: error communicating new power status to VMMDev. "
563	"rc = %Rrc\n", rc));
564	}
565
566	VbglGRFree (&req->header);
567	}
568	break;
569	}
570
571	case PowerActionShutdown:
572	case PowerActionShutdownOff:
573	{
574	dprintf(("VBoxGuest::VBoxGuestPower: power action shutdown!\n"));
575	if (powerState.SystemState >= PowerSystemShutdown)
576	{
577	dprintf(("VBoxGuest::VBoxGuestPower: Telling the VMMDev to close the VM...\n"));
578
579	if (pDevExt && pDevExt->powerStateRequest)
580	{
581	VMMDevPowerStateRequest *req = pDevExt->powerStateRequest;
582
583	req->header.requestType = VMMDevReq_SetPowerStatus;
584	req->powerState = VMMDevPowerState_PowerOff;
585
586	int rc = VbglGRPerform (&req->header);
587
588	if (RT_FAILURE(rc))
589	{
590	dprintf(("VBoxGuest::PowerStateRequest: error communicating new power status to VMMDev. "
591	"rc = %Rrc\n", rc));
592	}
593	}
594	}
595	break;
596	}
597	}
598	break;
599	}
600	default:
601	break;
602	}
603	break;
604	}
605	default:
606	break;
607	}
608
609	/*
610	* Whether we are completing or relaying this power IRP,
611	* we must call PoStartNextPowerIrp.
612	*/
613	PoStartNextPowerIrp(pIrp);
614
615	/*
616	* Send the IRP down the driver stack,
617	* using PoCallDriver (not IoCallDriver, as for non-power irps).
618	*/
619	IoCopyCurrentIrpStackLocationToNext(pIrp);
620	IoSetCompletionRoutine(pIrp,
621	VBoxGuestPowerComplete,
622	(PVOID)pDevExt,
623	TRUE,
624	TRUE,
625	TRUE);
626	return PoCallDriver(pDevExt->nextLowerDriver, pIrp);
627	}

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source: vbox/trunk/src/VBox/Additions/WINNT/VBoxGuest/VBoxGuestPnP.cpp@ 30931

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