PDMQueue.cpp@ 43858

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1	/* $Id: PDMQueue.cpp 41965 2012-06-29 02:52:49Z vboxsync $ */
2	/** @file
3	* PDM Queue - Transport data and tasks to EMT and R3.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*******************************************************************************
20	* Header Files *
21	*******************************************************************************/
22	#define LOG_GROUP LOG_GROUP_PDM_QUEUE
23	#include "PDMInternal.h"
24	#include <VBox/vmm/pdm.h>
25	#include <VBox/vmm/mm.h>
26	#ifdef VBOX_WITH_REM
27	# include <VBox/vmm/rem.h>
28	#endif
29	#include <VBox/vmm/vm.h>
30	#include <VBox/vmm/uvm.h>
31	#include <VBox/err.h>
32
33	#include <VBox/log.h>
34	#include <iprt/asm.h>
35	#include <iprt/assert.h>
36	#include <iprt/thread.h>
37
38
39	/*******************************************************************************
40	* Internal Functions *
41	*******************************************************************************/
42	DECLINLINE(void) pdmR3QueueFree(PPDMQUEUE pQueue, PPDMQUEUEITEMCORE pItem);
43	static bool pdmR3QueueFlush(PPDMQUEUE pQueue);
44	static DECLCALLBACK(void) pdmR3QueueTimer(PVM pVM, PTMTIMER pTimer, void *pvUser);
45
46
47
48	/**
49	* Internal worker for the queue creation apis.
50	*
51	* @returns VBox status.
52	* @param pVM Pointer to the VM.
53	* @param cbItem Item size.
54	* @param cItems Number of items.
55	* @param cMilliesInterval Number of milliseconds between polling the queue.
56	* If 0 then the emulation thread will be notified whenever an item arrives.
57	* @param fRZEnabled Set if the queue will be used from RC/R0 and need to be allocated from the hyper heap.
58	* @param pszName The queue name. Unique. Not copied.
59	* @param ppQueue Where to store the queue handle.
60	*/
61	static int pdmR3QueueCreate(PVM pVM, size_t cbItem, uint32_t cItems, uint32_t cMilliesInterval, bool fRZEnabled,
62	const char pszName, PPDMQUEUE ppQueue)
63	{
64	PUVM pUVM = pVM->pUVM;
65
66	/*
67	* Validate input.
68	*/
69	AssertMsgReturn(cbItem >= sizeof(PDMQUEUEITEMCORE) && cbItem < _1M, ("cbItem=%zu\n", cbItem), VERR_OUT_OF_RANGE);
70	AssertMsgReturn(cItems >= 1 && cItems <= _64K, ("cItems=%u\n", cItems), VERR_OUT_OF_RANGE);
71
72	/*
73	* Align the item size and calculate the structure size.
74	*/
75	cbItem = RT_ALIGN(cbItem, sizeof(RTUINTPTR));
76	size_t cb = cbItem * cItems + RT_ALIGN_Z(RT_OFFSETOF(PDMQUEUE, aFreeItems[cItems + PDMQUEUE_FREE_SLACK]), 16);
77	PPDMQUEUE pQueue;
78	int rc;
79	if (fRZEnabled)
80	rc = MMHyperAlloc(pVM, cb, 0, MM_TAG_PDM_QUEUE, (void **)&pQueue );
81	else
82	rc = MMR3HeapAllocZEx(pVM, MM_TAG_PDM_QUEUE, cb, (void **)&pQueue);
83	if (RT_FAILURE(rc))
84	return rc;
85
86	/*
87	* Initialize the data fields.
88	*/
89	pQueue->pVMR3 = pVM;
90	pQueue->pVMR0 = fRZEnabled ? pVM->pVMR0 : NIL_RTR0PTR;
91	pQueue->pVMRC = fRZEnabled ? pVM->pVMRC : NIL_RTRCPTR;
92	pQueue->pszName = pszName;
93	pQueue->cMilliesInterval = cMilliesInterval;
94	//pQueue->pTimer = NULL;
95	pQueue->cbItem = (uint32_t)cbItem;
96	pQueue->cItems = cItems;
97	//pQueue->pPendingR3 = NULL;
98	//pQueue->pPendingR0 = NULL;
99	//pQueue->pPendingRC = NULL;
100	pQueue->iFreeHead = cItems;
101	//pQueue->iFreeTail = 0;
102	PPDMQUEUEITEMCORE pItem = (PPDMQUEUEITEMCORE)((char *)pQueue + RT_ALIGN_Z(RT_OFFSETOF(PDMQUEUE, aFreeItems[cItems + PDMQUEUE_FREE_SLACK]), 16));
103	for (unsigned i = 0; i < cItems; i++, pItem = (PPDMQUEUEITEMCORE)((char *)pItem + cbItem))
104	{
105	pQueue->aFreeItems[i].pItemR3 = pItem;
106	if (fRZEnabled)
107	{
108	pQueue->aFreeItems[i].pItemR0 = MMHyperR3ToR0(pVM, pItem);
109	pQueue->aFreeItems[i].pItemRC = MMHyperR3ToRC(pVM, pItem);
110	}
111	}
112
113	/*
114	* Create timer?
115	*/
116	if (cMilliesInterval)
117	{
118	rc = TMR3TimerCreateInternal(pVM, TMCLOCK_REAL, pdmR3QueueTimer, pQueue, "Queue timer", &pQueue->pTimer);
119	if (RT_SUCCESS(rc))
120	{
121	rc = TMTimerSetMillies(pQueue->pTimer, cMilliesInterval);
122	if (RT_FAILURE(rc))
123	{
124	AssertMsgFailed(("TMTimerSetMillies failed rc=%Rrc\n", rc));
125	int rc2 = TMR3TimerDestroy(pQueue->pTimer); AssertRC(rc2);
126	}
127	}
128	else
129	AssertMsgFailed(("TMR3TimerCreateInternal failed rc=%Rrc\n", rc));
130	if (RT_FAILURE(rc))
131	{
132	if (fRZEnabled)
133	MMHyperFree(pVM, pQueue);
134	else
135	MMR3HeapFree(pQueue);
136	return rc;
137	}
138
139	/*
140	* Insert into the queue list for timer driven queues.
141	*/
142	pdmLock(pVM);
143	pQueue->pNext = pUVM->pdm.s.pQueuesTimer;
144	pUVM->pdm.s.pQueuesTimer = pQueue;
145	pdmUnlock(pVM);
146	}
147	else
148	{
149	/*
150	* Insert into the queue list for forced action driven queues.
151	* This is a FIFO, so insert at the end.
152	*/
153	/** @todo we should add a priority to the queues so we don't have to rely on
154	* the initialization order to deal with problems like @bugref{1605} (pgm/pcnet
155	* deadlock caused by the critsect queue to be last in the chain).
156	* - Update, the critical sections are no longer using queues, so this isn't a real
157	* problem any longer. The priority might be a nice feature for later though.
158	*/
159	pdmLock(pVM);
160	if (!pUVM->pdm.s.pQueuesForced)
161	pUVM->pdm.s.pQueuesForced = pQueue;
162	else
163	{
164	PPDMQUEUE pPrev = pUVM->pdm.s.pQueuesForced;
165	while (pPrev->pNext)
166	pPrev = pPrev->pNext;
167	pPrev->pNext = pQueue;
168	}
169	pdmUnlock(pVM);
170	}
171
172	/*
173	* Register the statistics.
174	*/
175	STAMR3RegisterF(pVM, &pQueue->cbItem, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, STAMUNIT_BYTES, "Item size.", "/PDM/Queue/%s/cbItem", pQueue->pszName);
176	STAMR3RegisterF(pVM, &pQueue->cItems, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT, "Queue size.", "/PDM/Queue/%s/cItems", pQueue->pszName);
177	STAMR3RegisterF(pVM, &pQueue->StatAllocFailures, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "PDMQueueAlloc failures.", "/PDM/Queue/%s/AllocFailures", pQueue->pszName);
178	STAMR3RegisterF(pVM, &pQueue->StatInsert, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS, "Calls to PDMQueueInsert.", "/PDM/Queue/%s/Insert", pQueue->pszName);
179	STAMR3RegisterF(pVM, &pQueue->StatFlush, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS, "Calls to pdmR3QueueFlush.", "/PDM/Queue/%s/Flush", pQueue->pszName);
180	STAMR3RegisterF(pVM, &pQueue->StatFlushLeftovers, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Left over items after flush.", "/PDM/Queue/%s/FlushLeftovers", pQueue->pszName);
181	#ifdef VBOX_WITH_STATISTICS
182	STAMR3RegisterF(pVM, &pQueue->StatFlushPrf, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS, "Profiling pdmR3QueueFlush.", "/PDM/Queue/%s/FlushPrf", pQueue->pszName);
183	STAMR3RegisterF(pVM, (void *)&pQueue->cStatPending, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT, "Pending items.", "/PDM/Queue/%s/Pending", pQueue->pszName);
184	#endif
185
186	*ppQueue = pQueue;
187	return VINF_SUCCESS;
188	}
189
190
191	/**
192	* Create a queue with a device owner.
193	*
194	* @returns VBox status code.
195	* @param pVM Pointer to the VM.
196	* @param pDevIns Device instance.
197	* @param cbItem Size a queue item.
198	* @param cItems Number of items in the queue.
199	* @param cMilliesInterval Number of milliseconds between polling the queue.
200	* If 0 then the emulation thread will be notified whenever an item arrives.
201	* @param pfnCallback The consumer function.
202	* @param fRZEnabled Set if the queue must be usable from RC/R0.
203	* @param pszName The queue name. Unique. Not copied.
204	* @param ppQueue Where to store the queue handle on success.
205	* @thread Emulation thread only.
206	*/
207	VMMR3_INT_DECL(int) PDMR3QueueCreateDevice(PVM pVM, PPDMDEVINS pDevIns, size_t cbItem, uint32_t cItems, uint32_t cMilliesInterval,
208	PFNPDMQUEUEDEV pfnCallback, bool fRZEnabled, const char pszName, PPDMQUEUE ppQueue)
209	{
210	LogFlow(("PDMR3QueueCreateDevice: pDevIns=%p cbItem=%d cItems=%d cMilliesInterval=%d pfnCallback=%p fRZEnabled=%RTbool pszName=%s\n",
211	pDevIns, cbItem, cItems, cMilliesInterval, pfnCallback, fRZEnabled, pszName));
212
213	/*
214	* Validate input.
215	*/
216	VMCPU_ASSERT_EMT(&pVM->aCpus[0]);
217	if (!pfnCallback)
218	{
219	AssertMsgFailed(("No consumer callback!\n"));
220	return VERR_INVALID_PARAMETER;
221	}
222
223	/*
224	* Create the queue.
225	*/
226	PPDMQUEUE pQueue;
227	int rc = pdmR3QueueCreate(pVM, cbItem, cItems, cMilliesInterval, fRZEnabled, pszName, &pQueue);
228	if (RT_SUCCESS(rc))
229	{
230	pQueue->enmType = PDMQUEUETYPE_DEV;
231	pQueue->u.Dev.pDevIns = pDevIns;
232	pQueue->u.Dev.pfnCallback = pfnCallback;
233
234	*ppQueue = pQueue;
235	Log(("PDM: Created device queue %p; cbItem=%d cItems=%d cMillies=%d pfnCallback=%p pDevIns=%p\n",
236	cbItem, cItems, cMilliesInterval, pfnCallback, pDevIns));
237	}
238	return rc;
239	}
240
241
242	/**
243	* Create a queue with a driver owner.
244	*
245	* @returns VBox status code.
246	* @param pVM Pointer to the VM.
247	* @param pDrvIns Driver instance.
248	* @param cbItem Size a queue item.
249	* @param cItems Number of items in the queue.
250	* @param cMilliesInterval Number of milliseconds between polling the queue.
251	* If 0 then the emulation thread will be notified whenever an item arrives.
252	* @param pfnCallback The consumer function.
253	* @param pszName The queue name. Unique. Not copied.
254	* @param ppQueue Where to store the queue handle on success.
255	* @thread Emulation thread only.
256	*/
257	VMMR3_INT_DECL(int) PDMR3QueueCreateDriver(PVM pVM, PPDMDRVINS pDrvIns, size_t cbItem, uint32_t cItems, uint32_t cMilliesInterval,
258	PFNPDMQUEUEDRV pfnCallback, const char pszName, PPDMQUEUE ppQueue)
259	{
260	LogFlow(("PDMR3QueueCreateDriver: pDrvIns=%p cbItem=%d cItems=%d cMilliesInterval=%d pfnCallback=%p pszName=%s\n",
261	pDrvIns, cbItem, cItems, cMilliesInterval, pfnCallback, pszName));
262
263	/*
264	* Validate input.
265	*/
266	VMCPU_ASSERT_EMT(&pVM->aCpus[0]);
267	if (!pfnCallback)
268	{
269	AssertMsgFailed(("No consumer callback!\n"));
270	return VERR_INVALID_PARAMETER;
271	}
272
273	/*
274	* Create the queue.
275	*/
276	PPDMQUEUE pQueue;
277	int rc = pdmR3QueueCreate(pVM, cbItem, cItems, cMilliesInterval, false, pszName, &pQueue);
278	if (RT_SUCCESS(rc))
279	{
280	pQueue->enmType = PDMQUEUETYPE_DRV;
281	pQueue->u.Drv.pDrvIns = pDrvIns;
282	pQueue->u.Drv.pfnCallback = pfnCallback;
283
284	*ppQueue = pQueue;
285	Log(("PDM: Created driver queue %p; cbItem=%d cItems=%d cMillies=%d pfnCallback=%p pDrvIns=%p\n",
286	cbItem, cItems, cMilliesInterval, pfnCallback, pDrvIns));
287	}
288	return rc;
289	}
290
291
292	/**
293	* Create a queue with an internal owner.
294	*
295	* @returns VBox status code.
296	* @param pVM Pointer to the VM.
297	* @param cbItem Size a queue item.
298	* @param cItems Number of items in the queue.
299	* @param cMilliesInterval Number of milliseconds between polling the queue.
300	* If 0 then the emulation thread will be notified whenever an item arrives.
301	* @param pfnCallback The consumer function.
302	* @param fRZEnabled Set if the queue must be usable from RC/R0.
303	* @param pszName The queue name. Unique. Not copied.
304	* @param ppQueue Where to store the queue handle on success.
305	* @thread Emulation thread only.
306	*/
307	VMMR3_INT_DECL(int) PDMR3QueueCreateInternal(PVM pVM, size_t cbItem, uint32_t cItems, uint32_t cMilliesInterval,
308	PFNPDMQUEUEINT pfnCallback, bool fRZEnabled, const char pszName, PPDMQUEUE ppQueue)
309	{
310	LogFlow(("PDMR3QueueCreateInternal: cbItem=%d cItems=%d cMilliesInterval=%d pfnCallback=%p fRZEnabled=%RTbool pszName=%s\n",
311	cbItem, cItems, cMilliesInterval, pfnCallback, fRZEnabled, pszName));
312
313	/*
314	* Validate input.
315	*/
316	VMCPU_ASSERT_EMT(&pVM->aCpus[0]);
317	if (!pfnCallback)
318	{
319	AssertMsgFailed(("No consumer callback!\n"));
320	return VERR_INVALID_PARAMETER;
321	}
322
323	/*
324	* Create the queue.
325	*/
326	PPDMQUEUE pQueue;
327	int rc = pdmR3QueueCreate(pVM, cbItem, cItems, cMilliesInterval, fRZEnabled, pszName, &pQueue);
328	if (RT_SUCCESS(rc))
329	{
330	pQueue->enmType = PDMQUEUETYPE_INTERNAL;
331	pQueue->u.Int.pfnCallback = pfnCallback;
332
333	*ppQueue = pQueue;
334	Log(("PDM: Created internal queue %p; cbItem=%d cItems=%d cMillies=%d pfnCallback=%p\n",
335	cbItem, cItems, cMilliesInterval, pfnCallback));
336	}
337	return rc;
338	}
339
340
341	/**
342	* Create a queue with an external owner.
343	*
344	* @returns VBox status code.
345	* @param pVM Pointer to the VM.
346	* @param cbItem Size a queue item.
347	* @param cItems Number of items in the queue.
348	* @param cMilliesInterval Number of milliseconds between polling the queue.
349	* If 0 then the emulation thread will be notified whenever an item arrives.
350	* @param pfnCallback The consumer function.
351	* @param pvUser The user argument to the consumer function.
352	* @param pszName The queue name. Unique. Not copied.
353	* @param ppQueue Where to store the queue handle on success.
354	* @thread Emulation thread only.
355	*/
356	VMMR3_INT_DECL(int) PDMR3QueueCreateExternal(PVM pVM, size_t cbItem, uint32_t cItems, uint32_t cMilliesInterval,
357	PFNPDMQUEUEEXT pfnCallback, void pvUser, const char pszName, PPDMQUEUE *ppQueue)
358	{
359	LogFlow(("PDMR3QueueCreateExternal: cbItem=%d cItems=%d cMilliesInterval=%d pfnCallback=%p pszName=%s\n", cbItem, cItems, cMilliesInterval, pfnCallback, pszName));
360
361	/*
362	* Validate input.
363	*/
364	VMCPU_ASSERT_EMT(&pVM->aCpus[0]);
365	if (!pfnCallback)
366	{
367	AssertMsgFailed(("No consumer callback!\n"));
368	return VERR_INVALID_PARAMETER;
369	}
370
371	/*
372	* Create the queue.
373	*/
374	PPDMQUEUE pQueue;
375	int rc = pdmR3QueueCreate(pVM, cbItem, cItems, cMilliesInterval, false, pszName, &pQueue);
376	if (RT_SUCCESS(rc))
377	{
378	pQueue->enmType = PDMQUEUETYPE_EXTERNAL;
379	pQueue->u.Ext.pvUser = pvUser;
380	pQueue->u.Ext.pfnCallback = pfnCallback;
381
382	*ppQueue = pQueue;
383	Log(("PDM: Created external queue %p; cbItem=%d cItems=%d cMillies=%d pfnCallback=%p pvUser=%p\n",
384	cbItem, cItems, cMilliesInterval, pfnCallback, pvUser));
385	}
386	return rc;
387	}
388
389
390	/**
391	* Destroy a queue.
392	*
393	* @returns VBox status code.
394	* @param pQueue Queue to destroy.
395	* @thread Emulation thread only.
396	*/
397	VMMR3_INT_DECL(int) PDMR3QueueDestroy(PPDMQUEUE pQueue)
398	{
399	LogFlow(("PDMR3QueueDestroy: pQueue=%p\n", pQueue));
400
401	/*
402	* Validate input.
403	*/
404	if (!pQueue)
405	return VERR_INVALID_PARAMETER;
406	Assert(pQueue && pQueue->pVMR3);
407	PVM pVM = pQueue->pVMR3;
408	PUVM pUVM = pVM->pUVM;
409
410	pdmLock(pVM);
411
412	/*
413	* Unlink it.
414	*/
415	if (pQueue->pTimer)
416	{
417	if (pUVM->pdm.s.pQueuesTimer != pQueue)
418	{
419	PPDMQUEUE pCur = pUVM->pdm.s.pQueuesTimer;
420	while (pCur)
421	{
422	if (pCur->pNext == pQueue)
423	{
424	pCur->pNext = pQueue->pNext;
425	break;
426	}
427	pCur = pCur->pNext;
428	}
429	AssertMsg(pCur, ("Didn't find the queue!\n"));
430	}
431	else
432	pUVM->pdm.s.pQueuesTimer = pQueue->pNext;
433	}
434	else
435	{
436	if (pUVM->pdm.s.pQueuesForced != pQueue)
437	{
438	PPDMQUEUE pCur = pUVM->pdm.s.pQueuesForced;
439	while (pCur)
440	{
441	if (pCur->pNext == pQueue)
442	{
443	pCur->pNext = pQueue->pNext;
444	break;
445	}
446	pCur = pCur->pNext;
447	}
448	AssertMsg(pCur, ("Didn't find the queue!\n"));
449	}
450	else
451	pUVM->pdm.s.pQueuesForced = pQueue->pNext;
452	}
453	pQueue->pNext = NULL;
454	pQueue->pVMR3 = NULL;
455	pdmUnlock(pVM);
456
457	/*
458	* Deregister statistics.
459	*/
460	STAMR3Deregister(pVM, &pQueue->cbItem);
461	STAMR3Deregister(pVM, &pQueue->cbItem);
462	STAMR3Deregister(pVM, &pQueue->StatAllocFailures);
463	STAMR3Deregister(pVM, &pQueue->StatInsert);
464	STAMR3Deregister(pVM, &pQueue->StatFlush);
465	STAMR3Deregister(pVM, &pQueue->StatFlushLeftovers);
466	#ifdef VBOX_WITH_STATISTICS
467	STAMR3Deregister(pVM, &pQueue->StatFlushPrf);
468	STAMR3Deregister(pVM, (void *)&pQueue->cStatPending);
469	#endif
470
471	/*
472	* Destroy the timer and free it.
473	*/
474	if (pQueue->pTimer)
475	{
476	TMR3TimerDestroy(pQueue->pTimer);
477	pQueue->pTimer = NULL;
478	}
479	if (pQueue->pVMRC)
480	{
481	pQueue->pVMRC = NIL_RTRCPTR;
482	pQueue->pVMR0 = NIL_RTR0PTR;
483	MMHyperFree(pVM, pQueue);
484	}
485	else
486	MMR3HeapFree(pQueue);
487
488	return VINF_SUCCESS;
489	}
490
491
492	/**
493	* Destroy a all queues owned by the specified device.
494	*
495	* @returns VBox status code.
496	* @param pVM Pointer to the VM.
497	* @param pDevIns Device instance.
498	* @thread Emulation thread only.
499	*/
500	VMMR3_INT_DECL(int) PDMR3QueueDestroyDevice(PVM pVM, PPDMDEVINS pDevIns)
501	{
502	LogFlow(("PDMR3QueueDestroyDevice: pDevIns=%p\n", pDevIns));
503
504	/*
505	* Validate input.
506	*/
507	if (!pDevIns)
508	return VERR_INVALID_PARAMETER;
509
510	PUVM pUVM = pVM->pUVM;
511	pdmLock(pVM);
512
513	/*
514	* Unlink it.
515	*/
516	PPDMQUEUE pQueueNext = pUVM->pdm.s.pQueuesTimer;
517	PPDMQUEUE pQueue = pUVM->pdm.s.pQueuesForced;
518	do
519	{
520	while (pQueue)
521	{
522	if ( pQueue->enmType == PDMQUEUETYPE_DEV
523	&& pQueue->u.Dev.pDevIns == pDevIns)
524	{
525	PPDMQUEUE pQueueDestroy = pQueue;
526	pQueue = pQueue->pNext;
527	int rc = PDMR3QueueDestroy(pQueueDestroy);
528	AssertRC(rc);
529	}
530	else
531	pQueue = pQueue->pNext;
532	}
533
534	/* next queue list */
535	pQueue = pQueueNext;
536	pQueueNext = NULL;
537	} while (pQueue);
538
539	pdmUnlock(pVM);
540	return VINF_SUCCESS;
541	}
542
543
544	/**
545	* Destroy a all queues owned by the specified driver.
546	*
547	* @returns VBox status code.
548	* @param pVM Pointer to the VM.
549	* @param pDrvIns Driver instance.
550	* @thread Emulation thread only.
551	*/
552	VMMR3_INT_DECL(int) PDMR3QueueDestroyDriver(PVM pVM, PPDMDRVINS pDrvIns)
553	{
554	LogFlow(("PDMR3QueueDestroyDriver: pDrvIns=%p\n", pDrvIns));
555
556	/*
557	* Validate input.
558	*/
559	if (!pDrvIns)
560	return VERR_INVALID_PARAMETER;
561
562	PUVM pUVM = pVM->pUVM;
563	pdmLock(pVM);
564
565	/*
566	* Unlink it.
567	*/
568	PPDMQUEUE pQueueNext = pUVM->pdm.s.pQueuesTimer;
569	PPDMQUEUE pQueue = pUVM->pdm.s.pQueuesForced;
570	do
571	{
572	while (pQueue)
573	{
574	if ( pQueue->enmType == PDMQUEUETYPE_DRV
575	&& pQueue->u.Drv.pDrvIns == pDrvIns)
576	{
577	PPDMQUEUE pQueueDestroy = pQueue;
578	pQueue = pQueue->pNext;
579	int rc = PDMR3QueueDestroy(pQueueDestroy);
580	AssertRC(rc);
581	}
582	else
583	pQueue = pQueue->pNext;
584	}
585
586	/* next queue list */
587	pQueue = pQueueNext;
588	pQueueNext = NULL;
589	} while (pQueue);
590
591	pdmUnlock(pVM);
592	return VINF_SUCCESS;
593	}
594
595
596	/**
597	* Relocate the queues.
598	*
599	* @param pVM Pointer to the VM.
600	* @param offDelta The relocation delta.
601	*/
602	void pdmR3QueueRelocate(PVM pVM, RTGCINTPTR offDelta)
603	{
604	/*
605	* Process the queues.
606	*/
607	PUVM pUVM = pVM->pUVM;
608	PPDMQUEUE pQueueNext = pUVM->pdm.s.pQueuesTimer;
609	PPDMQUEUE pQueue = pUVM->pdm.s.pQueuesForced;
610	do
611	{
612	while (pQueue)
613	{
614	if (pQueue->pVMRC)
615	{
616	pQueue->pVMRC = pVM->pVMRC;
617
618	/* Pending RC items. */
619	if (pQueue->pPendingRC)
620	{
621	pQueue->pPendingRC += offDelta;
622	PPDMQUEUEITEMCORE pCur = (PPDMQUEUEITEMCORE)MMHyperRCToR3(pVM, pQueue->pPendingRC);
623	while (pCur->pNextRC)
624	{
625	pCur->pNextRC += offDelta;
626	pCur = (PPDMQUEUEITEMCORE)MMHyperRCToR3(pVM, pCur->pNextRC);
627	}
628	}
629
630	/* The free items. */
631	uint32_t i = pQueue->iFreeTail;
632	while (i != pQueue->iFreeHead)
633	{
634	pQueue->aFreeItems[i].pItemRC = MMHyperR3ToRC(pVM, pQueue->aFreeItems[i].pItemR3);
635	i = (i + 1) % (pQueue->cItems + PDMQUEUE_FREE_SLACK);
636	}
637	}
638
639	/* next queue */
640	pQueue = pQueue->pNext;
641	}
642
643	/* next queue list */
644	pQueue = pQueueNext;
645	pQueueNext = NULL;
646	} while (pQueue);
647	}
648
649
650	/**
651	* Flush pending queues.
652	* This is a forced action callback.
653	*
654	* @param pVM Pointer to the VM.
655	* @thread Emulation thread only.
656	*/
657	VMMR3_INT_DECL(void) PDMR3QueueFlushAll(PVM pVM)
658	{
659	VM_ASSERT_EMT(pVM);
660	LogFlow(("PDMR3QueuesFlush:\n"));
661
662	/*
663	* Only let one EMT flushing queues at any one time to preserve the order
664	* and to avoid wasting time. The FF is always cleared here, because it's
665	* only used to get someones attention. Queue inserts occurring during the
666	* flush are caught using the pending bit.
667	*
668	* Note! We must check the force action and pending flags after clearing
669	* the active bit!
670	*/
671	VM_FF_CLEAR(pVM, VM_FF_PDM_QUEUES);
672	while (!ASMAtomicBitTestAndSet(&pVM->pdm.s.fQueueFlushing, PDM_QUEUE_FLUSH_FLAG_ACTIVE_BIT))
673	{
674	ASMAtomicBitClear(&pVM->pdm.s.fQueueFlushing, PDM_QUEUE_FLUSH_FLAG_PENDING_BIT);
675
676	for (PPDMQUEUE pCur = pVM->pUVM->pdm.s.pQueuesForced; pCur; pCur = pCur->pNext)
677	if ( pCur->pPendingR3
678	\|\| pCur->pPendingR0
679	\|\| pCur->pPendingRC)
680	pdmR3QueueFlush(pCur);
681
682	ASMAtomicBitClear(&pVM->pdm.s.fQueueFlushing, PDM_QUEUE_FLUSH_FLAG_ACTIVE_BIT);
683
684	/* We're done if there were no inserts while we were busy. */
685	if ( !ASMBitTest(&pVM->pdm.s.fQueueFlushing, PDM_QUEUE_FLUSH_FLAG_PENDING_BIT)
686	&& !VM_FF_ISPENDING(pVM, VM_FF_PDM_QUEUES))
687	break;
688	VM_FF_CLEAR(pVM, VM_FF_PDM_QUEUES);
689	}
690	}
691
692
693	/**
694	* Process pending items in one queue.
695	*
696	* @returns Success indicator.
697	* If false the item the consumer said "enough!".
698	* @param pQueue The queue.
699	*/
700	static bool pdmR3QueueFlush(PPDMQUEUE pQueue)
701	{
702	STAM_PROFILE_START(&pQueue->StatFlushPrf,p);
703
704	/*
705	* Get the lists.
706	*/
707	PPDMQUEUEITEMCORE pItems = ASMAtomicXchgPtrT(&pQueue->pPendingR3, NULL, PPDMQUEUEITEMCORE);
708	RTRCPTR pItemsRC = ASMAtomicXchgRCPtr(&pQueue->pPendingRC, NIL_RTRCPTR);
709	RTR0PTR pItemsR0 = ASMAtomicXchgR0Ptr(&pQueue->pPendingR0, NIL_RTR0PTR);
710
711	AssertMsgReturn( pItemsR0
712	\|\| pItemsRC
713	\|\| pItems,
714	("Someone is racing us? This shouldn't happen!\n"),
715	true);
716
717	/*
718	* Reverse the list (it's inserted in LIFO order to avoid semaphores, remember).
719	*/
720	PPDMQUEUEITEMCORE pCur = pItems;
721	pItems = NULL;
722	while (pCur)
723	{
724	PPDMQUEUEITEMCORE pInsert = pCur;
725	pCur = pCur->pNextR3;
726	pInsert->pNextR3 = pItems;
727	pItems = pInsert;
728	}
729
730	/*
731	* Do the same for any pending RC items.
732	*/
733	while (pItemsRC)
734	{
735	PPDMQUEUEITEMCORE pInsert = (PPDMQUEUEITEMCORE)MMHyperRCToR3(pQueue->pVMR3, pItemsRC);
736	pItemsRC = pInsert->pNextRC;
737	pInsert->pNextRC = NIL_RTRCPTR;
738	pInsert->pNextR3 = pItems;
739	pItems = pInsert;
740	}
741
742	/*
743	* Do the same for any pending R0 items.
744	*/
745	while (pItemsR0)
746	{
747	PPDMQUEUEITEMCORE pInsert = (PPDMQUEUEITEMCORE)MMHyperR0ToR3(pQueue->pVMR3, pItemsR0);
748	pItemsR0 = pInsert->pNextR0;
749	pInsert->pNextR0 = NIL_RTR0PTR;
750	pInsert->pNextR3 = pItems;
751	pItems = pInsert;
752	}
753
754	/*
755	* Feed the items to the consumer function.
756	*/
757	Log2(("pdmR3QueueFlush: pQueue=%p enmType=%d pItems=%p\n", pQueue, pQueue->enmType, pItems));
758	switch (pQueue->enmType)
759	{
760	case PDMQUEUETYPE_DEV:
761	while (pItems)
762	{
763	if (!pQueue->u.Dev.pfnCallback(pQueue->u.Dev.pDevIns, pItems))
764	break;
765	pCur = pItems;
766	pItems = pItems->pNextR3;
767	pdmR3QueueFree(pQueue, pCur);
768	}
769	break;
770
771	case PDMQUEUETYPE_DRV:
772	while (pItems)
773	{
774	if (!pQueue->u.Drv.pfnCallback(pQueue->u.Drv.pDrvIns, pItems))
775	break;
776	pCur = pItems;
777	pItems = pItems->pNextR3;
778	pdmR3QueueFree(pQueue, pCur);
779	}
780	break;
781
782	case PDMQUEUETYPE_INTERNAL:
783	while (pItems)
784	{
785	if (!pQueue->u.Int.pfnCallback(pQueue->pVMR3, pItems))
786	break;
787	pCur = pItems;
788	pItems = pItems->pNextR3;
789	pdmR3QueueFree(pQueue, pCur);
790	}
791	break;
792
793	case PDMQUEUETYPE_EXTERNAL:
794	while (pItems)
795	{
796	if (!pQueue->u.Ext.pfnCallback(pQueue->u.Ext.pvUser, pItems))
797	break;
798	pCur = pItems;
799	pItems = pItems->pNextR3;
800	pdmR3QueueFree(pQueue, pCur);
801	}
802	break;
803
804	default:
805	AssertMsgFailed(("Invalid queue type %d\n", pQueue->enmType));
806	break;
807	}
808
809	/*
810	* Success?
811	*/
812	if (pItems)
813	{
814	/*
815	* Reverse the list.
816	*/
817	pCur = pItems;
818	pItems = NULL;
819	while (pCur)
820	{
821	PPDMQUEUEITEMCORE pInsert = pCur;
822	pCur = pInsert->pNextR3;
823	pInsert->pNextR3 = pItems;
824	pItems = pInsert;
825	}
826
827	/*
828	* Insert the list at the tail of the pending list.
829	*/
830	for (;;)
831	{
832	if (ASMAtomicCmpXchgPtr(&pQueue->pPendingR3, pItems, NULL))
833	break;
834	PPDMQUEUEITEMCORE pPending = ASMAtomicXchgPtrT(&pQueue->pPendingR3, NULL, PPDMQUEUEITEMCORE);
835	if (pPending)
836	{
837	pCur = pPending;
838	while (pCur->pNextR3)
839	pCur = pCur->pNextR3;
840	pCur->pNextR3 = pItems;
841	pItems = pPending;
842	}
843	}
844
845	STAM_REL_COUNTER_INC(&pQueue->StatFlushLeftovers);
846	STAM_PROFILE_STOP(&pQueue->StatFlushPrf,p);
847	return false;
848	}
849
850	STAM_PROFILE_STOP(&pQueue->StatFlushPrf,p);
851	return true;
852	}
853
854
855	/**
856	* Free an item.
857	*
858	* @param pQueue The queue.
859	* @param pItem The item.
860	*/
861	DECLINLINE(void) pdmR3QueueFree(PPDMQUEUE pQueue, PPDMQUEUEITEMCORE pItem)
862	{
863	VM_ASSERT_EMT(pQueue->pVMR3);
864
865	int i = pQueue->iFreeHead;
866	int iNext = (i + 1) % (pQueue->cItems + PDMQUEUE_FREE_SLACK);
867
868	pQueue->aFreeItems[i].pItemR3 = pItem;
869	if (pQueue->pVMRC)
870	{
871	pQueue->aFreeItems[i].pItemRC = MMHyperR3ToRC(pQueue->pVMR3, pItem);
872	pQueue->aFreeItems[i].pItemR0 = MMHyperR3ToR0(pQueue->pVMR3, pItem);
873	}
874
875	if (!ASMAtomicCmpXchgU32(&pQueue->iFreeHead, iNext, i))
876	AssertMsgFailed(("huh? i=%d iNext=%d iFreeHead=%d iFreeTail=%d\n", i, iNext, pQueue->iFreeHead, pQueue->iFreeTail));
877	STAM_STATS({ ASMAtomicDecU32(&pQueue->cStatPending); });
878	}
879
880
881	/**
882	* Timer handler for PDM queues.
883	* This is called by for a single queue.
884	*
885	* @param pVM Pointer to the VM.
886	* @param pTimer Pointer to timer.
887	* @param pvUser Pointer to the queue.
888	*/
889	static DECLCALLBACK(void) pdmR3QueueTimer(PVM pVM, PTMTIMER pTimer, void *pvUser)
890	{
891	PPDMQUEUE pQueue = (PPDMQUEUE)pvUser;
892	Assert(pTimer == pQueue->pTimer); NOREF(pTimer); NOREF(pVM);
893
894	if ( pQueue->pPendingR3
895	\|\| pQueue->pPendingR0
896	\|\| pQueue->pPendingRC)
897	pdmR3QueueFlush(pQueue);
898	int rc = TMTimerSetMillies(pQueue->pTimer, pQueue->cMilliesInterval);
899	AssertRC(rc);
900	}
901

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source: vbox/trunk/src/VBox/VMM/VMMR3/PDMQueue.cpp@ 43858

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