PDMQueue.cpp@ 45665

Last change on this file since 45665 was 44504, checked in by vboxsync, 12 years ago
small cleanups.
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1	/* $Id: PDMQueue.cpp 44504 2013-02-01 10:09:30Z vboxsync $ */
2	/** @file
3	* PDM Queue - Transport data and tasks to EMT and R3.
4	*/
5
6	/*
7	* Copyright (C) 2006-2013 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) pdmR3QueueFreeItem(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	AssertPtrReturn(pfnCallback, VERR_INVALID_POINTER);
268
269	/*
270	* Create the queue.
271	*/
272	PPDMQUEUE pQueue;
273	int rc = pdmR3QueueCreate(pVM, cbItem, cItems, cMilliesInterval, false, pszName, &pQueue);
274	if (RT_SUCCESS(rc))
275	{
276	pQueue->enmType = PDMQUEUETYPE_DRV;
277	pQueue->u.Drv.pDrvIns = pDrvIns;
278	pQueue->u.Drv.pfnCallback = pfnCallback;
279
280	*ppQueue = pQueue;
281	Log(("PDM: Created driver queue %p; cbItem=%d cItems=%d cMillies=%d pfnCallback=%p pDrvIns=%p\n",
282	cbItem, cItems, cMilliesInterval, pfnCallback, pDrvIns));
283	}
284	return rc;
285	}
286
287
288	/**
289	* Create a queue with an internal owner.
290	*
291	* @returns VBox status code.
292	* @param pVM Pointer to the VM.
293	* @param cbItem Size a queue item.
294	* @param cItems Number of items in the queue.
295	* @param cMilliesInterval Number of milliseconds between polling the queue.
296	* If 0 then the emulation thread will be notified whenever an item arrives.
297	* @param pfnCallback The consumer function.
298	* @param fRZEnabled Set if the queue must be usable from RC/R0.
299	* @param pszName The queue name. Unique. Not copied.
300	* @param ppQueue Where to store the queue handle on success.
301	* @thread Emulation thread only.
302	*/
303	VMMR3_INT_DECL(int) PDMR3QueueCreateInternal(PVM pVM, size_t cbItem, uint32_t cItems, uint32_t cMilliesInterval,
304	PFNPDMQUEUEINT pfnCallback, bool fRZEnabled, const char pszName, PPDMQUEUE ppQueue)
305	{
306	LogFlow(("PDMR3QueueCreateInternal: cbItem=%d cItems=%d cMilliesInterval=%d pfnCallback=%p fRZEnabled=%RTbool pszName=%s\n",
307	cbItem, cItems, cMilliesInterval, pfnCallback, fRZEnabled, pszName));
308
309	/*
310	* Validate input.
311	*/
312	VMCPU_ASSERT_EMT(&pVM->aCpus[0]);
313	AssertPtrReturn(pfnCallback, VERR_INVALID_POINTER);
314
315	/*
316	* Create the queue.
317	*/
318	PPDMQUEUE pQueue;
319	int rc = pdmR3QueueCreate(pVM, cbItem, cItems, cMilliesInterval, fRZEnabled, pszName, &pQueue);
320	if (RT_SUCCESS(rc))
321	{
322	pQueue->enmType = PDMQUEUETYPE_INTERNAL;
323	pQueue->u.Int.pfnCallback = pfnCallback;
324
325	*ppQueue = pQueue;
326	Log(("PDM: Created internal queue %p; cbItem=%d cItems=%d cMillies=%d pfnCallback=%p\n",
327	cbItem, cItems, cMilliesInterval, pfnCallback));
328	}
329	return rc;
330	}
331
332
333	/**
334	* Create a queue with an external owner.
335	*
336	* @returns VBox status code.
337	* @param pVM Pointer to the VM.
338	* @param cbItem Size a queue item.
339	* @param cItems Number of items in the queue.
340	* @param cMilliesInterval Number of milliseconds between polling the queue.
341	* If 0 then the emulation thread will be notified whenever an item arrives.
342	* @param pfnCallback The consumer function.
343	* @param pvUser The user argument to the consumer function.
344	* @param pszName The queue name. Unique. Not copied.
345	* @param ppQueue Where to store the queue handle on success.
346	* @thread Emulation thread only.
347	*/
348	VMMR3_INT_DECL(int) PDMR3QueueCreateExternal(PVM pVM, size_t cbItem, uint32_t cItems, uint32_t cMilliesInterval,
349	PFNPDMQUEUEEXT pfnCallback, void pvUser, const char pszName, PPDMQUEUE *ppQueue)
350	{
351	LogFlow(("PDMR3QueueCreateExternal: cbItem=%d cItems=%d cMilliesInterval=%d pfnCallback=%p pszName=%s\n", cbItem, cItems, cMilliesInterval, pfnCallback, pszName));
352
353	/*
354	* Validate input.
355	*/
356	VMCPU_ASSERT_EMT(&pVM->aCpus[0]);
357	AssertPtrReturn(pfnCallback, VERR_INVALID_POINTER);
358
359	/*
360	* Create the queue.
361	*/
362	PPDMQUEUE pQueue;
363	int rc = pdmR3QueueCreate(pVM, cbItem, cItems, cMilliesInterval, false, pszName, &pQueue);
364	if (RT_SUCCESS(rc))
365	{
366	pQueue->enmType = PDMQUEUETYPE_EXTERNAL;
367	pQueue->u.Ext.pvUser = pvUser;
368	pQueue->u.Ext.pfnCallback = pfnCallback;
369
370	*ppQueue = pQueue;
371	Log(("PDM: Created external queue %p; cbItem=%d cItems=%d cMillies=%d pfnCallback=%p pvUser=%p\n",
372	cbItem, cItems, cMilliesInterval, pfnCallback, pvUser));
373	}
374	return rc;
375	}
376
377
378	/**
379	* Destroy a queue.
380	*
381	* @returns VBox status code.
382	* @param pQueue Queue to destroy.
383	* @thread Emulation thread only.
384	*/
385	VMMR3_INT_DECL(int) PDMR3QueueDestroy(PPDMQUEUE pQueue)
386	{
387	LogFlow(("PDMR3QueueDestroy: pQueue=%p\n", pQueue));
388
389	/*
390	* Validate input.
391	*/
392	if (!pQueue)
393	return VERR_INVALID_PARAMETER;
394	Assert(pQueue && pQueue->pVMR3);
395	PVM pVM = pQueue->pVMR3;
396	PUVM pUVM = pVM->pUVM;
397
398	pdmLock(pVM);
399
400	/*
401	* Unlink it.
402	*/
403	if (pQueue->pTimer)
404	{
405	if (pUVM->pdm.s.pQueuesTimer != pQueue)
406	{
407	PPDMQUEUE pCur = pUVM->pdm.s.pQueuesTimer;
408	while (pCur)
409	{
410	if (pCur->pNext == pQueue)
411	{
412	pCur->pNext = pQueue->pNext;
413	break;
414	}
415	pCur = pCur->pNext;
416	}
417	AssertMsg(pCur, ("Didn't find the queue!\n"));
418	}
419	else
420	pUVM->pdm.s.pQueuesTimer = pQueue->pNext;
421	}
422	else
423	{
424	if (pUVM->pdm.s.pQueuesForced != pQueue)
425	{
426	PPDMQUEUE pCur = pUVM->pdm.s.pQueuesForced;
427	while (pCur)
428	{
429	if (pCur->pNext == pQueue)
430	{
431	pCur->pNext = pQueue->pNext;
432	break;
433	}
434	pCur = pCur->pNext;
435	}
436	AssertMsg(pCur, ("Didn't find the queue!\n"));
437	}
438	else
439	pUVM->pdm.s.pQueuesForced = pQueue->pNext;
440	}
441	pQueue->pNext = NULL;
442	pQueue->pVMR3 = NULL;
443	pdmUnlock(pVM);
444
445	/*
446	* Deregister statistics.
447	*/
448	STAMR3Deregister(pVM, &pQueue->cbItem);
449	STAMR3Deregister(pVM, &pQueue->cbItem);
450	STAMR3Deregister(pVM, &pQueue->StatAllocFailures);
451	STAMR3Deregister(pVM, &pQueue->StatInsert);
452	STAMR3Deregister(pVM, &pQueue->StatFlush);
453	STAMR3Deregister(pVM, &pQueue->StatFlushLeftovers);
454	#ifdef VBOX_WITH_STATISTICS
455	STAMR3Deregister(pVM, &pQueue->StatFlushPrf);
456	STAMR3Deregister(pVM, (void *)&pQueue->cStatPending);
457	#endif
458
459	/*
460	* Destroy the timer and free it.
461	*/
462	if (pQueue->pTimer)
463	{
464	TMR3TimerDestroy(pQueue->pTimer);
465	pQueue->pTimer = NULL;
466	}
467	if (pQueue->pVMRC)
468	{
469	pQueue->pVMRC = NIL_RTRCPTR;
470	pQueue->pVMR0 = NIL_RTR0PTR;
471	MMHyperFree(pVM, pQueue);
472	}
473	else
474	MMR3HeapFree(pQueue);
475
476	return VINF_SUCCESS;
477	}
478
479
480	/**
481	* Destroy a all queues owned by the specified device.
482	*
483	* @returns VBox status code.
484	* @param pVM Pointer to the VM.
485	* @param pDevIns Device instance.
486	* @thread Emulation thread only.
487	*/
488	VMMR3_INT_DECL(int) PDMR3QueueDestroyDevice(PVM pVM, PPDMDEVINS pDevIns)
489	{
490	LogFlow(("PDMR3QueueDestroyDevice: pDevIns=%p\n", pDevIns));
491
492	/*
493	* Validate input.
494	*/
495	if (!pDevIns)
496	return VERR_INVALID_PARAMETER;
497
498	PUVM pUVM = pVM->pUVM;
499	pdmLock(pVM);
500
501	/*
502	* Unlink it.
503	*/
504	PPDMQUEUE pQueueNext = pUVM->pdm.s.pQueuesTimer;
505	PPDMQUEUE pQueue = pUVM->pdm.s.pQueuesForced;
506	do
507	{
508	while (pQueue)
509	{
510	if ( pQueue->enmType == PDMQUEUETYPE_DEV
511	&& pQueue->u.Dev.pDevIns == pDevIns)
512	{
513	PPDMQUEUE pQueueDestroy = pQueue;
514	pQueue = pQueue->pNext;
515	int rc = PDMR3QueueDestroy(pQueueDestroy);
516	AssertRC(rc);
517	}
518	else
519	pQueue = pQueue->pNext;
520	}
521
522	/* next queue list */
523	pQueue = pQueueNext;
524	pQueueNext = NULL;
525	} while (pQueue);
526
527	pdmUnlock(pVM);
528	return VINF_SUCCESS;
529	}
530
531
532	/**
533	* Destroy a all queues owned by the specified driver.
534	*
535	* @returns VBox status code.
536	* @param pVM Pointer to the VM.
537	* @param pDrvIns Driver instance.
538	* @thread Emulation thread only.
539	*/
540	VMMR3_INT_DECL(int) PDMR3QueueDestroyDriver(PVM pVM, PPDMDRVINS pDrvIns)
541	{
542	LogFlow(("PDMR3QueueDestroyDriver: pDrvIns=%p\n", pDrvIns));
543
544	/*
545	* Validate input.
546	*/
547	if (!pDrvIns)
548	return VERR_INVALID_PARAMETER;
549
550	PUVM pUVM = pVM->pUVM;
551	pdmLock(pVM);
552
553	/*
554	* Unlink it.
555	*/
556	PPDMQUEUE pQueueNext = pUVM->pdm.s.pQueuesTimer;
557	PPDMQUEUE pQueue = pUVM->pdm.s.pQueuesForced;
558	do
559	{
560	while (pQueue)
561	{
562	if ( pQueue->enmType == PDMQUEUETYPE_DRV
563	&& pQueue->u.Drv.pDrvIns == pDrvIns)
564	{
565	PPDMQUEUE pQueueDestroy = pQueue;
566	pQueue = pQueue->pNext;
567	int rc = PDMR3QueueDestroy(pQueueDestroy);
568	AssertRC(rc);
569	}
570	else
571	pQueue = pQueue->pNext;
572	}
573
574	/* next queue list */
575	pQueue = pQueueNext;
576	pQueueNext = NULL;
577	} while (pQueue);
578
579	pdmUnlock(pVM);
580	return VINF_SUCCESS;
581	}
582
583
584	/**
585	* Relocate the queues.
586	*
587	* @param pVM Pointer to the VM.
588	* @param offDelta The relocation delta.
589	*/
590	void pdmR3QueueRelocate(PVM pVM, RTGCINTPTR offDelta)
591	{
592	/*
593	* Process the queues.
594	*/
595	PUVM pUVM = pVM->pUVM;
596	PPDMQUEUE pQueueNext = pUVM->pdm.s.pQueuesTimer;
597	PPDMQUEUE pQueue = pUVM->pdm.s.pQueuesForced;
598	do
599	{
600	while (pQueue)
601	{
602	if (pQueue->pVMRC)
603	{
604	pQueue->pVMRC = pVM->pVMRC;
605
606	/* Pending RC items. */
607	if (pQueue->pPendingRC)
608	{
609	pQueue->pPendingRC += offDelta;
610	PPDMQUEUEITEMCORE pCur = (PPDMQUEUEITEMCORE)MMHyperRCToR3(pVM, pQueue->pPendingRC);
611	while (pCur->pNextRC)
612	{
613	pCur->pNextRC += offDelta;
614	pCur = (PPDMQUEUEITEMCORE)MMHyperRCToR3(pVM, pCur->pNextRC);
615	}
616	}
617
618	/* The free items. */
619	uint32_t i = pQueue->iFreeTail;
620	while (i != pQueue->iFreeHead)
621	{
622	pQueue->aFreeItems[i].pItemRC = MMHyperR3ToRC(pVM, pQueue->aFreeItems[i].pItemR3);
623	i = (i + 1) % (pQueue->cItems + PDMQUEUE_FREE_SLACK);
624	}
625	}
626
627	/* next queue */
628	pQueue = pQueue->pNext;
629	}
630
631	/* next queue list */
632	pQueue = pQueueNext;
633	pQueueNext = NULL;
634	} while (pQueue);
635	}
636
637
638	/**
639	* Flush pending queues.
640	* This is a forced action callback.
641	*
642	* @param pVM Pointer to the VM.
643	* @thread Emulation thread only.
644	*/
645	VMMR3_INT_DECL(void) PDMR3QueueFlushAll(PVM pVM)
646	{
647	VM_ASSERT_EMT(pVM);
648	LogFlow(("PDMR3QueuesFlush:\n"));
649
650	/*
651	* Only let one EMT flushing queues at any one time to preserve the order
652	* and to avoid wasting time. The FF is always cleared here, because it's
653	* only used to get someones attention. Queue inserts occurring during the
654	* flush are caught using the pending bit.
655	*
656	* Note! We must check the force action and pending flags after clearing
657	* the active bit!
658	*/
659	VM_FF_CLEAR(pVM, VM_FF_PDM_QUEUES);
660	while (!ASMAtomicBitTestAndSet(&pVM->pdm.s.fQueueFlushing, PDM_QUEUE_FLUSH_FLAG_ACTIVE_BIT))
661	{
662	ASMAtomicBitClear(&pVM->pdm.s.fQueueFlushing, PDM_QUEUE_FLUSH_FLAG_PENDING_BIT);
663
664	for (PPDMQUEUE pCur = pVM->pUVM->pdm.s.pQueuesForced; pCur; pCur = pCur->pNext)
665	if ( pCur->pPendingR3
666	\|\| pCur->pPendingR0
667	\|\| pCur->pPendingRC)
668	pdmR3QueueFlush(pCur);
669
670	ASMAtomicBitClear(&pVM->pdm.s.fQueueFlushing, PDM_QUEUE_FLUSH_FLAG_ACTIVE_BIT);
671
672	/* We're done if there were no inserts while we were busy. */
673	if ( !ASMBitTest(&pVM->pdm.s.fQueueFlushing, PDM_QUEUE_FLUSH_FLAG_PENDING_BIT)
674	&& !VM_FF_ISPENDING(pVM, VM_FF_PDM_QUEUES))
675	break;
676	VM_FF_CLEAR(pVM, VM_FF_PDM_QUEUES);
677	}
678	}
679
680
681	/**
682	* Process pending items in one queue.
683	*
684	* @returns Success indicator.
685	* If false the item the consumer said "enough!".
686	* @param pQueue The queue.
687	*/
688	static bool pdmR3QueueFlush(PPDMQUEUE pQueue)
689	{
690	STAM_PROFILE_START(&pQueue->StatFlushPrf,p);
691
692	/*
693	* Get the lists.
694	*/
695	PPDMQUEUEITEMCORE pItems = ASMAtomicXchgPtrT(&pQueue->pPendingR3, NULL, PPDMQUEUEITEMCORE);
696	RTRCPTR pItemsRC = ASMAtomicXchgRCPtr(&pQueue->pPendingRC, NIL_RTRCPTR);
697	RTR0PTR pItemsR0 = ASMAtomicXchgR0Ptr(&pQueue->pPendingR0, NIL_RTR0PTR);
698
699	AssertMsgReturn( pItemsR0
700	\|\| pItemsRC
701	\|\| pItems,
702	("Someone is racing us? This shouldn't happen!\n"),
703	true);
704
705	/*
706	* Reverse the list (it's inserted in LIFO order to avoid semaphores, remember).
707	*/
708	PPDMQUEUEITEMCORE pCur = pItems;
709	pItems = NULL;
710	while (pCur)
711	{
712	PPDMQUEUEITEMCORE pInsert = pCur;
713	pCur = pCur->pNextR3;
714	pInsert->pNextR3 = pItems;
715	pItems = pInsert;
716	}
717
718	/*
719	* Do the same for any pending RC items.
720	*/
721	while (pItemsRC)
722	{
723	PPDMQUEUEITEMCORE pInsert = (PPDMQUEUEITEMCORE)MMHyperRCToR3(pQueue->pVMR3, pItemsRC);
724	pItemsRC = pInsert->pNextRC;
725	pInsert->pNextRC = NIL_RTRCPTR;
726	pInsert->pNextR3 = pItems;
727	pItems = pInsert;
728	}
729
730	/*
731	* Do the same for any pending R0 items.
732	*/
733	while (pItemsR0)
734	{
735	PPDMQUEUEITEMCORE pInsert = (PPDMQUEUEITEMCORE)MMHyperR0ToR3(pQueue->pVMR3, pItemsR0);
736	pItemsR0 = pInsert->pNextR0;
737	pInsert->pNextR0 = NIL_RTR0PTR;
738	pInsert->pNextR3 = pItems;
739	pItems = pInsert;
740	}
741
742	/*
743	* Feed the items to the consumer function.
744	*/
745	Log2(("pdmR3QueueFlush: pQueue=%p enmType=%d pItems=%p\n", pQueue, pQueue->enmType, pItems));
746	switch (pQueue->enmType)
747	{
748	case PDMQUEUETYPE_DEV:
749	while (pItems)
750	{
751	if (!pQueue->u.Dev.pfnCallback(pQueue->u.Dev.pDevIns, pItems))
752	break;
753	pCur = pItems;
754	pItems = pItems->pNextR3;
755	pdmR3QueueFreeItem(pQueue, pCur);
756	}
757	break;
758
759	case PDMQUEUETYPE_DRV:
760	while (pItems)
761	{
762	if (!pQueue->u.Drv.pfnCallback(pQueue->u.Drv.pDrvIns, pItems))
763	break;
764	pCur = pItems;
765	pItems = pItems->pNextR3;
766	pdmR3QueueFreeItem(pQueue, pCur);
767	}
768	break;
769
770	case PDMQUEUETYPE_INTERNAL:
771	while (pItems)
772	{
773	if (!pQueue->u.Int.pfnCallback(pQueue->pVMR3, pItems))
774	break;
775	pCur = pItems;
776	pItems = pItems->pNextR3;
777	pdmR3QueueFreeItem(pQueue, pCur);
778	}
779	break;
780
781	case PDMQUEUETYPE_EXTERNAL:
782	while (pItems)
783	{
784	if (!pQueue->u.Ext.pfnCallback(pQueue->u.Ext.pvUser, pItems))
785	break;
786	pCur = pItems;
787	pItems = pItems->pNextR3;
788	pdmR3QueueFreeItem(pQueue, pCur);
789	}
790	break;
791
792	default:
793	AssertMsgFailed(("Invalid queue type %d\n", pQueue->enmType));
794	break;
795	}
796
797	/*
798	* Success?
799	*/
800	if (pItems)
801	{
802	/*
803	* Reverse the list.
804	*/
805	pCur = pItems;
806	pItems = NULL;
807	while (pCur)
808	{
809	PPDMQUEUEITEMCORE pInsert = pCur;
810	pCur = pInsert->pNextR3;
811	pInsert->pNextR3 = pItems;
812	pItems = pInsert;
813	}
814
815	/*
816	* Insert the list at the tail of the pending list.
817	*/
818	for (;;)
819	{
820	if (ASMAtomicCmpXchgPtr(&pQueue->pPendingR3, pItems, NULL))
821	break;
822	PPDMQUEUEITEMCORE pPending = ASMAtomicXchgPtrT(&pQueue->pPendingR3, NULL, PPDMQUEUEITEMCORE);
823	if (pPending)
824	{
825	pCur = pPending;
826	while (pCur->pNextR3)
827	pCur = pCur->pNextR3;
828	pCur->pNextR3 = pItems;
829	pItems = pPending;
830	}
831	}
832
833	STAM_REL_COUNTER_INC(&pQueue->StatFlushLeftovers);
834	STAM_PROFILE_STOP(&pQueue->StatFlushPrf,p);
835	return false;
836	}
837
838	STAM_PROFILE_STOP(&pQueue->StatFlushPrf,p);
839	return true;
840	}
841
842
843	/**
844	* Free an item.
845	*
846	* @param pQueue The queue.
847	* @param pItem The item.
848	*/
849	DECLINLINE(void) pdmR3QueueFreeItem(PPDMQUEUE pQueue, PPDMQUEUEITEMCORE pItem)
850	{
851	VM_ASSERT_EMT(pQueue->pVMR3);
852
853	int i = pQueue->iFreeHead;
854	int iNext = (i + 1) % (pQueue->cItems + PDMQUEUE_FREE_SLACK);
855
856	pQueue->aFreeItems[i].pItemR3 = pItem;
857	if (pQueue->pVMRC)
858	{
859	pQueue->aFreeItems[i].pItemRC = MMHyperR3ToRC(pQueue->pVMR3, pItem);
860	pQueue->aFreeItems[i].pItemR0 = MMHyperR3ToR0(pQueue->pVMR3, pItem);
861	}
862
863	if (!ASMAtomicCmpXchgU32(&pQueue->iFreeHead, iNext, i))
864	AssertMsgFailed(("huh? i=%d iNext=%d iFreeHead=%d iFreeTail=%d\n", i, iNext, pQueue->iFreeHead, pQueue->iFreeTail));
865	STAM_STATS({ ASMAtomicDecU32(&pQueue->cStatPending); });
866	}
867
868
869	/**
870	* Timer handler for PDM queues.
871	* This is called by for a single queue.
872	*
873	* @param pVM Pointer to the VM.
874	* @param pTimer Pointer to timer.
875	* @param pvUser Pointer to the queue.
876	*/
877	static DECLCALLBACK(void) pdmR3QueueTimer(PVM pVM, PTMTIMER pTimer, void *pvUser)
878	{
879	PPDMQUEUE pQueue = (PPDMQUEUE)pvUser;
880	Assert(pTimer == pQueue->pTimer); NOREF(pTimer); NOREF(pVM);
881
882	if ( pQueue->pPendingR3
883	\|\| pQueue->pPendingR0
884	\|\| pQueue->pPendingRC)
885	pdmR3QueueFlush(pQueue);
886	int rc = TMTimerSetMillies(pQueue->pTimer, pQueue->cMilliesInterval);
887	AssertRC(rc);
888	}
889

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source: vbox/trunk/src/VBox/VMM/VMMR3/PDMQueue.cpp@ 45665

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