PDMAsyncCompletion.cpp@ 103583

Last change on this file since 103583 was 99775, checked in by vboxsync, 19 months ago
*: Mark functions as static if not used outside of a given compilation unit. Enables the compiler to optimize inlining, reduces the symbol tables, exposes unused functions and in some rare cases exposes mismtaches between function declarations and definitions, but most importantly reduces the number of parfait reports for the extern-function-no-forward-declaration category. This should not result in any functional changes, bugref:3409
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1	/* $Id: PDMAsyncCompletion.cpp 99775 2023-05-12 12:21:58Z vboxsync $ */
2	/** @file
3	* PDM Async I/O - Transport data asynchronous in R3 using EMT.
4	*/
5
6	/*
7	* Copyright (C) 2006-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/*********************************************************************************************************************************
30	* Header Files *
31	*********************************************************************************************************************************/
32	#define LOG_GROUP LOG_GROUP_PDM_ASYNC_COMPLETION
33	#include "PDMInternal.h"
34	#include <VBox/vmm/pdm.h>
35	#include <VBox/vmm/mm.h>
36	#include <VBox/vmm/vm.h>
37	#include <VBox/vmm/uvm.h>
38	#include <VBox/err.h>
39
40	#include <VBox/log.h>
41	#include <iprt/asm.h>
42	#include <iprt/assert.h>
43	#include <iprt/thread.h>
44	#include <iprt/mem.h>
45	#include <iprt/critsect.h>
46	#include <iprt/tcp.h>
47	#include <iprt/path.h>
48	#include <iprt/string.h>
49
50	#include <VBox/vmm/pdmasynccompletion.h>
51	#include "PDMAsyncCompletionInternal.h"
52
53
54	/*********************************************************************************************************************************
55	* Structures and Typedefs *
56	*********************************************************************************************************************************/
57	/**
58	* Async I/O type.
59	*/
60	typedef enum PDMASYNCCOMPLETIONTEMPLATETYPE
61	{
62	/** Device . */
63	PDMASYNCCOMPLETIONTEMPLATETYPE_DEV = 1,
64	/** Driver consumer. */
65	PDMASYNCCOMPLETIONTEMPLATETYPE_DRV,
66	/** Internal consumer. */
67	PDMASYNCCOMPLETIONTEMPLATETYPE_INTERNAL,
68	/** Usb consumer. */
69	PDMASYNCCOMPLETIONTEMPLATETYPE_USB
70	} PDMASYNCTEMPLATETYPE;
71
72	/**
73	* PDM Async I/O template.
74	*/
75	typedef struct PDMASYNCCOMPLETIONTEMPLATE
76	{
77	/** Pointer to the next template in the list. */
78	R3PTRTYPE(PPDMASYNCCOMPLETIONTEMPLATE) pNext;
79	/** Pointer to the previous template in the list. */
80	R3PTRTYPE(PPDMASYNCCOMPLETIONTEMPLATE) pPrev;
81	/** Type specific data. */
82	union
83	{
84	/** PDMASYNCCOMPLETIONTEMPLATETYPE_DEV */
85	struct
86	{
87	/** Pointer to consumer function. */
88	R3PTRTYPE(PFNPDMASYNCCOMPLETEDEV) pfnCompleted;
89	/** Pointer to the device instance owning the template. */
90	R3PTRTYPE(PPDMDEVINS) pDevIns;
91	} Dev;
92	/** PDMASYNCCOMPLETIONTEMPLATETYPE_DRV */
93	struct
94	{
95	/** Pointer to consumer function. */
96	R3PTRTYPE(PFNPDMASYNCCOMPLETEDRV) pfnCompleted;
97	/** Pointer to the driver instance owning the template. */
98	R3PTRTYPE(PPDMDRVINS) pDrvIns;
99	/** User argument given during template creation.
100	* This is only here to make things much easier
101	* for DrVVD. */
102	void *pvTemplateUser;
103	} Drv;
104	/** PDMASYNCCOMPLETIONTEMPLATETYPE_INTERNAL */
105	struct
106	{
107	/** Pointer to consumer function. */
108	R3PTRTYPE(PFNPDMASYNCCOMPLETEINT) pfnCompleted;
109	/** Pointer to user data. */
110	R3PTRTYPE(void *) pvUser;
111	} Int;
112	/** PDMASYNCCOMPLETIONTEMPLATETYPE_USB */
113	struct
114	{
115	/** Pointer to consumer function. */
116	R3PTRTYPE(PFNPDMASYNCCOMPLETEUSB) pfnCompleted;
117	/** Pointer to the usb instance owning the template. */
118	R3PTRTYPE(PPDMUSBINS) pUsbIns;
119	} Usb;
120	} u;
121	/** Template type. */
122	PDMASYNCCOMPLETIONTEMPLATETYPE enmType;
123	/** Pointer to the VM. */
124	R3PTRTYPE(PVM) pVM;
125	/** Use count of the template. */
126	volatile uint32_t cUsed;
127	} PDMASYNCCOMPLETIONTEMPLATE;
128
129	/**
130	* Bandwidth control manager instance data
131	*/
132	typedef struct PDMACBWMGR
133	{
134	/** Pointer to the next manager in the list. */
135	struct PDMACBWMGR *pNext;
136	/** Pointer to the shared UVM structure. */
137	PPDMASYNCCOMPLETIONEPCLASS pEpClass;
138	/** Identifier of the manager. */
139	char *pszId;
140	/** Maximum number of bytes the endpoints are allowed to transfer (Max is 4GB/s currently) */
141	volatile uint32_t cbTransferPerSecMax;
142	/** Number of bytes we start with */
143	volatile uint32_t cbTransferPerSecStart;
144	/** Step after each update */
145	volatile uint32_t cbTransferPerSecStep;
146	/** Number of bytes we are allowed to transfer till the next update.
147	* Reset by the refresh timer. */
148	volatile uint32_t cbTransferAllowed;
149	/** Timestamp of the last update */
150	volatile uint64_t tsUpdatedLast;
151	/** Reference counter - How many endpoints are associated with this manager. */
152	volatile uint32_t cRefs;
153	} PDMACBWMGR;
154	/** Pointer to a bandwidth control manager pointer. */
155	typedef PPDMACBWMGR *PPPDMACBWMGR;
156
157
158	/*********************************************************************************************************************************
159	* Internal Functions *
160	*********************************************************************************************************************************/
161	static void pdmR3AsyncCompletionPutTask(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, PPDMASYNCCOMPLETIONTASK pTask);
162
163
164	/**
165	* Internal worker for the creation apis
166	*
167	* @returns VBox status code.
168	* @param pVM The cross context VM structure.
169	* @param ppTemplate Where to store the template handle.
170	* @param enmType Async completion template type (dev, drv, usb, int).
171	*/
172	static int pdmR3AsyncCompletionTemplateCreate(PVM pVM, PPPDMASYNCCOMPLETIONTEMPLATE ppTemplate,
173	PDMASYNCCOMPLETIONTEMPLATETYPE enmType)
174	{
175	PUVM pUVM = pVM->pUVM;
176
177	AssertPtrReturn(ppTemplate, VERR_INVALID_POINTER);
178
179	PPDMASYNCCOMPLETIONTEMPLATE pTemplate;
180	int rc = MMR3HeapAllocZEx(pVM, MM_TAG_PDM_ASYNC_COMPLETION, sizeof(PDMASYNCCOMPLETIONTEMPLATE), (void **)&pTemplate);
181	if (RT_FAILURE(rc))
182	return rc;
183
184	/*
185	* Initialize fields.
186	*/
187	pTemplate->pVM = pVM;
188	pTemplate->cUsed = 0;
189	pTemplate->enmType = enmType;
190
191	/*
192	* Add template to the global VM template list.
193	*/
194	RTCritSectEnter(&pUVM->pdm.s.ListCritSect);
195	pTemplate->pNext = pUVM->pdm.s.pAsyncCompletionTemplates;
196	if (pUVM->pdm.s.pAsyncCompletionTemplates)
197	pUVM->pdm.s.pAsyncCompletionTemplates->pPrev = pTemplate;
198	pUVM->pdm.s.pAsyncCompletionTemplates = pTemplate;
199	RTCritSectLeave(&pUVM->pdm.s.ListCritSect);
200
201	*ppTemplate = pTemplate;
202	return VINF_SUCCESS;
203	}
204
205
206	#ifdef SOME_UNUSED_FUNCTION
207	/**
208	* Creates a async completion template for a device instance.
209	*
210	* The template is used when creating new completion tasks.
211	*
212	* @returns VBox status code.
213	* @param pVM The cross context VM structure.
214	* @param pDevIns The device instance.
215	* @param ppTemplate Where to store the template pointer on success.
216	* @param pfnCompleted The completion callback routine.
217	* @param pszDesc Description.
218	*/
219	int pdmR3AsyncCompletionTemplateCreateDevice(PVM pVM, PPDMDEVINS pDevIns, PPPDMASYNCCOMPLETIONTEMPLATE ppTemplate,
220	PFNPDMASYNCCOMPLETEDEV pfnCompleted, const char *pszDesc)
221	{
222	LogFlow(("%s: pDevIns=%p ppTemplate=%p pfnCompleted=%p pszDesc=%s\n",
223	__FUNCTION__, pDevIns, ppTemplate, pfnCompleted, pszDesc));
224
225	/*
226	* Validate input.
227	*/
228	VM_ASSERT_EMT(pVM);
229	AssertPtrReturn(pfnCompleted, VERR_INVALID_POINTER);
230	AssertPtrReturn(ppTemplate, VERR_INVALID_POINTER);
231
232	/*
233	* Create the template.
234	*/
235	PPDMASYNCCOMPLETIONTEMPLATE pTemplate;
236	int rc = pdmR3AsyncCompletionTemplateCreate(pVM, &pTemplate, PDMASYNCCOMPLETIONTEMPLATETYPE_DEV);
237	if (RT_SUCCESS(rc))
238	{
239	pTemplate->u.Dev.pDevIns = pDevIns;
240	pTemplate->u.Dev.pfnCompleted = pfnCompleted;
241
242	*ppTemplate = pTemplate;
243	Log(("PDM: Created device template %p: pfnCompleted=%p pDevIns=%p\n",
244	pTemplate, pfnCompleted, pDevIns));
245	}
246
247	return rc;
248	}
249	#endif /* SOME_UNUSED_FUNCTION */
250
251
252	/**
253	* Creates a async completion template for a driver instance.
254	*
255	* The template is used when creating new completion tasks.
256	*
257	* @returns VBox status code.
258	* @param pVM The cross context VM structure.
259	* @param pDrvIns The driver instance.
260	* @param ppTemplate Where to store the template pointer on success.
261	* @param pfnCompleted The completion callback routine.
262	* @param pvTemplateUser Template user argument
263	* @param pszDesc Description.
264	*/
265	int pdmR3AsyncCompletionTemplateCreateDriver(PVM pVM, PPDMDRVINS pDrvIns, PPPDMASYNCCOMPLETIONTEMPLATE ppTemplate,
266	PFNPDMASYNCCOMPLETEDRV pfnCompleted, void *pvTemplateUser,
267	const char *pszDesc)
268	{
269	LogFlow(("PDMR3AsyncCompletionTemplateCreateDriver: pDrvIns=%p ppTemplate=%p pfnCompleted=%p pszDesc=%s\n",
270	pDrvIns, ppTemplate, pfnCompleted, pszDesc));
271	RT_NOREF_PV(pszDesc); /** @todo async template description */
272
273	/*
274	* Validate input.
275	*/
276	AssertPtrReturn(pfnCompleted, VERR_INVALID_POINTER);
277	AssertPtrReturn(ppTemplate, VERR_INVALID_POINTER);
278
279	/*
280	* Create the template.
281	*/
282	PPDMASYNCCOMPLETIONTEMPLATE pTemplate;
283	int rc = pdmR3AsyncCompletionTemplateCreate(pVM, &pTemplate, PDMASYNCCOMPLETIONTEMPLATETYPE_DRV);
284	if (RT_SUCCESS(rc))
285	{
286	pTemplate->u.Drv.pDrvIns = pDrvIns;
287	pTemplate->u.Drv.pfnCompleted = pfnCompleted;
288	pTemplate->u.Drv.pvTemplateUser = pvTemplateUser;
289
290	*ppTemplate = pTemplate;
291	Log(("PDM: Created driver template %p: pfnCompleted=%p pDrvIns=%p\n",
292	pTemplate, pfnCompleted, pDrvIns));
293	}
294
295	return rc;
296	}
297
298
299	#ifdef SOME_UNUSED_FUNCTION
300	/**
301	* Creates a async completion template for a USB device instance.
302	*
303	* The template is used when creating new completion tasks.
304	*
305	* @returns VBox status code.
306	* @param pVM The cross context VM structure.
307	* @param pUsbIns The USB device instance.
308	* @param ppTemplate Where to store the template pointer on success.
309	* @param pfnCompleted The completion callback routine.
310	* @param pszDesc Description.
311	*/
312	int pdmR3AsyncCompletionTemplateCreateUsb(PVM pVM, PPDMUSBINS pUsbIns, PPPDMASYNCCOMPLETIONTEMPLATE ppTemplate,
313	PFNPDMASYNCCOMPLETEUSB pfnCompleted, const char *pszDesc)
314	{
315	LogFlow(("pdmR3AsyncCompletionTemplateCreateUsb: pUsbIns=%p ppTemplate=%p pfnCompleted=%p pszDesc=%s\n", pUsbIns, ppTemplate, pfnCompleted, pszDesc));
316
317	/*
318	* Validate input.
319	*/
320	VM_ASSERT_EMT(pVM);
321	AssertPtrReturn(pfnCompleted, VERR_INVALID_POINTER);
322	AssertPtrReturn(ppTemplate, VERR_INVALID_POINTER);
323
324	/*
325	* Create the template.
326	*/
327	PPDMASYNCCOMPLETIONTEMPLATE pTemplate;
328	int rc = pdmR3AsyncCompletionTemplateCreate(pVM, &pTemplate, PDMASYNCCOMPLETIONTEMPLATETYPE_USB);
329	if (RT_SUCCESS(rc))
330	{
331	pTemplate->u.Usb.pUsbIns = pUsbIns;
332	pTemplate->u.Usb.pfnCompleted = pfnCompleted;
333
334	*ppTemplate = pTemplate;
335	Log(("PDM: Created usb template %p: pfnCompleted=%p pDevIns=%p\n",
336	pTemplate, pfnCompleted, pUsbIns));
337	}
338
339	return rc;
340	}
341	#endif
342
343
344	/**
345	* Creates a async completion template for internally by the VMM.
346	*
347	* The template is used when creating new completion tasks.
348	*
349	* @returns VBox status code.
350	* @param pVM The cross context VM structure.
351	* @param ppTemplate Where to store the template pointer on success.
352	* @param pfnCompleted The completion callback routine.
353	* @param pvUser2 The 2nd user argument for the callback.
354	* @param pszDesc Description.
355	* @internal
356	*/
357	VMMR3DECL(int) PDMR3AsyncCompletionTemplateCreateInternal(PVM pVM, PPPDMASYNCCOMPLETIONTEMPLATE ppTemplate,
358	PFNPDMASYNCCOMPLETEINT pfnCompleted, void pvUser2, const char pszDesc)
359	{
360	LogFlow(("PDMR3AsyncCompletionTemplateCreateInternal: ppTemplate=%p pfnCompleted=%p pvUser2=%p pszDesc=%s\n",
361	ppTemplate, pfnCompleted, pvUser2, pszDesc));
362	RT_NOREF_PV(pszDesc); /** @todo async template description */
363
364
365	/*
366	* Validate input.
367	*/
368	VM_ASSERT_EMT(pVM);
369	AssertPtrReturn(pfnCompleted, VERR_INVALID_POINTER);
370	AssertPtrReturn(ppTemplate, VERR_INVALID_POINTER);
371
372	/*
373	* Create the template.
374	*/
375	PPDMASYNCCOMPLETIONTEMPLATE pTemplate;
376	int rc = pdmR3AsyncCompletionTemplateCreate(pVM, &pTemplate, PDMASYNCCOMPLETIONTEMPLATETYPE_INTERNAL);
377	if (RT_SUCCESS(rc))
378	{
379	pTemplate->u.Int.pvUser = pvUser2;
380	pTemplate->u.Int.pfnCompleted = pfnCompleted;
381
382	*ppTemplate = pTemplate;
383	Log(("PDM: Created internal template %p: pfnCompleted=%p pvUser2=%p\n",
384	pTemplate, pfnCompleted, pvUser2));
385	}
386
387	return rc;
388	}
389
390
391	/**
392	* Destroys the specified async completion template.
393	*
394	* @returns VBox status codes:
395	* @retval VINF_SUCCESS on success.
396	* @retval VERR_PDM_ASYNC_TEMPLATE_BUSY if the template is still in use.
397	*
398	* @param pTemplate The template in question.
399	*/
400	VMMR3DECL(int) PDMR3AsyncCompletionTemplateDestroy(PPDMASYNCCOMPLETIONTEMPLATE pTemplate)
401	{
402	LogFlow(("%s: pTemplate=%p\n", __FUNCTION__, pTemplate));
403
404	if (!pTemplate)
405	{
406	AssertMsgFailed(("pTemplate is NULL!\n"));
407	return VERR_INVALID_PARAMETER;
408	}
409
410	/*
411	* Check if the template is still used.
412	*/
413	if (pTemplate->cUsed > 0)
414	{
415	AssertMsgFailed(("Template is still in use\n"));
416	return VERR_PDM_ASYNC_TEMPLATE_BUSY;
417	}
418
419	/*
420	* Unlink the template from the list.
421	*/
422	PUVM pUVM = pTemplate->pVM->pUVM;
423	RTCritSectEnter(&pUVM->pdm.s.ListCritSect);
424
425	PPDMASYNCCOMPLETIONTEMPLATE pPrev = pTemplate->pPrev;
426	PPDMASYNCCOMPLETIONTEMPLATE pNext = pTemplate->pNext;
427
428	if (pPrev)
429	pPrev->pNext = pNext;
430	else
431	pUVM->pdm.s.pAsyncCompletionTemplates = pNext;
432
433	if (pNext)
434	pNext->pPrev = pPrev;
435
436	RTCritSectLeave(&pUVM->pdm.s.ListCritSect);
437
438	/*
439	* Free the template.
440	*/
441	MMR3HeapFree(pTemplate);
442
443	return VINF_SUCCESS;
444	}
445
446
447	/**
448	* Destroys all the specified async completion templates for the given device instance.
449	*
450	* @returns VBox status codes:
451	* @retval VINF_SUCCESS on success.
452	* @retval VERR_PDM_ASYNC_TEMPLATE_BUSY if one or more of the templates are still in use.
453	*
454	* @param pVM The cross context VM structure.
455	* @param pDevIns The device instance.
456	*/
457	int pdmR3AsyncCompletionTemplateDestroyDevice(PVM pVM, PPDMDEVINS pDevIns)
458	{
459	LogFlow(("pdmR3AsyncCompletionTemplateDestroyDevice: pDevIns=%p\n", pDevIns));
460
461	/*
462	* Validate input.
463	*/
464	if (!pDevIns)
465	return VERR_INVALID_PARAMETER;
466	VM_ASSERT_EMT(pVM);
467
468	/*
469	* Unlink it.
470	*/
471	PUVM pUVM = pVM->pUVM;
472	RTCritSectEnter(&pUVM->pdm.s.ListCritSect);
473	PPDMASYNCCOMPLETIONTEMPLATE pTemplate = pUVM->pdm.s.pAsyncCompletionTemplates;
474	while (pTemplate)
475	{
476	if ( pTemplate->enmType == PDMASYNCCOMPLETIONTEMPLATETYPE_DEV
477	&& pTemplate->u.Dev.pDevIns == pDevIns)
478	{
479	PPDMASYNCCOMPLETIONTEMPLATE pTemplateDestroy = pTemplate;
480	pTemplate = pTemplate->pNext;
481	int rc = PDMR3AsyncCompletionTemplateDestroy(pTemplateDestroy);
482	if (RT_FAILURE(rc))
483	{
484	RTCritSectLeave(&pUVM->pdm.s.ListCritSect);
485	return rc;
486	}
487	}
488	else
489	pTemplate = pTemplate->pNext;
490	}
491
492	RTCritSectLeave(&pUVM->pdm.s.ListCritSect);
493	return VINF_SUCCESS;
494	}
495
496
497	/**
498	* Destroys all the specified async completion templates for the given driver instance.
499	*
500	* @returns VBox status codes:
501	* @retval VINF_SUCCESS on success.
502	* @retval VERR_PDM_ASYNC_TEMPLATE_BUSY if one or more of the templates are still in use.
503	*
504	* @param pVM The cross context VM structure.
505	* @param pDrvIns The driver instance.
506	*/
507	int pdmR3AsyncCompletionTemplateDestroyDriver(PVM pVM, PPDMDRVINS pDrvIns)
508	{
509	LogFlow(("pdmR3AsyncCompletionTemplateDestroyDriver: pDevIns=%p\n", pDrvIns));
510
511	/*
512	* Validate input.
513	*/
514	if (!pDrvIns)
515	return VERR_INVALID_PARAMETER;
516	VM_ASSERT_EMT(pVM);
517
518	/*
519	* Unlink it.
520	*/
521	PUVM pUVM = pVM->pUVM;
522	RTCritSectEnter(&pUVM->pdm.s.ListCritSect);
523	PPDMASYNCCOMPLETIONTEMPLATE pTemplate = pUVM->pdm.s.pAsyncCompletionTemplates;
524	while (pTemplate)
525	{
526	if ( pTemplate->enmType == PDMASYNCCOMPLETIONTEMPLATETYPE_DRV
527	&& pTemplate->u.Drv.pDrvIns == pDrvIns)
528	{
529	PPDMASYNCCOMPLETIONTEMPLATE pTemplateDestroy = pTemplate;
530	pTemplate = pTemplate->pNext;
531	int rc = PDMR3AsyncCompletionTemplateDestroy(pTemplateDestroy);
532	if (RT_FAILURE(rc))
533	{
534	RTCritSectLeave(&pUVM->pdm.s.ListCritSect);
535	return rc;
536	}
537	}
538	else
539	pTemplate = pTemplate->pNext;
540	}
541
542	RTCritSectLeave(&pUVM->pdm.s.ListCritSect);
543	return VINF_SUCCESS;
544	}
545
546
547	/**
548	* Destroys all the specified async completion templates for the given USB device instance.
549	*
550	* @returns VBox status codes:
551	* @retval VINF_SUCCESS on success.
552	* @retval VERR_PDM_ASYNC_TEMPLATE_BUSY if one or more of the templates are still in use.
553	*
554	* @param pVM The cross context VM structure.
555	* @param pUsbIns The USB device instance.
556	*/
557	int pdmR3AsyncCompletionTemplateDestroyUsb(PVM pVM, PPDMUSBINS pUsbIns)
558	{
559	LogFlow(("pdmR3AsyncCompletionTemplateDestroyUsb: pUsbIns=%p\n", pUsbIns));
560
561	/*
562	* Validate input.
563	*/
564	if (!pUsbIns)
565	return VERR_INVALID_PARAMETER;
566	VM_ASSERT_EMT(pVM);
567
568	/*
569	* Unlink it.
570	*/
571	PUVM pUVM = pVM->pUVM;
572	RTCritSectEnter(&pUVM->pdm.s.ListCritSect);
573	PPDMASYNCCOMPLETIONTEMPLATE pTemplate = pUVM->pdm.s.pAsyncCompletionTemplates;
574	while (pTemplate)
575	{
576	if ( pTemplate->enmType == PDMASYNCCOMPLETIONTEMPLATETYPE_USB
577	&& pTemplate->u.Usb.pUsbIns == pUsbIns)
578	{
579	PPDMASYNCCOMPLETIONTEMPLATE pTemplateDestroy = pTemplate;
580	pTemplate = pTemplate->pNext;
581	int rc = PDMR3AsyncCompletionTemplateDestroy(pTemplateDestroy);
582	if (RT_FAILURE(rc))
583	{
584	RTCritSectLeave(&pUVM->pdm.s.ListCritSect);
585	return rc;
586	}
587	}
588	else
589	pTemplate = pTemplate->pNext;
590	}
591
592	RTCritSectLeave(&pUVM->pdm.s.ListCritSect);
593	return VINF_SUCCESS;
594	}
595
596
597	/** Lazy coder. */
598	static PPDMACBWMGR pdmacBwMgrFindById(PPDMASYNCCOMPLETIONEPCLASS pEpClass, const char *pszId)
599	{
600	PPDMACBWMGR pBwMgr = NULL;
601
602	if (pszId)
603	{
604	int rc = RTCritSectEnter(&pEpClass->CritSect); AssertRC(rc);
605
606	pBwMgr = pEpClass->pBwMgrsHead;
607	while ( pBwMgr
608	&& RTStrCmp(pBwMgr->pszId, pszId))
609	pBwMgr = pBwMgr->pNext;
610
611	rc = RTCritSectLeave(&pEpClass->CritSect); AssertRC(rc);
612	}
613
614	return pBwMgr;
615	}
616
617
618	/** Lazy coder. */
619	static void pdmacBwMgrLink(PPDMACBWMGR pBwMgr)
620	{
621	PPDMASYNCCOMPLETIONEPCLASS pEpClass = pBwMgr->pEpClass;
622	int rc = RTCritSectEnter(&pEpClass->CritSect); AssertRC(rc);
623
624	pBwMgr->pNext = pEpClass->pBwMgrsHead;
625	pEpClass->pBwMgrsHead = pBwMgr;
626
627	rc = RTCritSectLeave(&pEpClass->CritSect); AssertRC(rc);
628	}
629
630
631	#ifdef SOME_UNUSED_FUNCTION
632	/** Lazy coder. */
633	static void pdmacBwMgrUnlink(PPDMACBWMGR pBwMgr)
634	{
635	PPDMASYNCCOMPLETIONEPCLASS pEpClass = pBwMgr->pEpClass;
636	int rc = RTCritSectEnter(&pEpClass->CritSect); AssertRC(rc);
637
638	if (pBwMgr == pEpClass->pBwMgrsHead)
639	pEpClass->pBwMgrsHead = pBwMgr->pNext;
640	else
641	{
642	PPDMACBWMGR pPrev = pEpClass->pBwMgrsHead;
643	while ( pPrev
644	&& pPrev->pNext != pBwMgr)
645	pPrev = pPrev->pNext;
646
647	AssertPtr(pPrev);
648	pPrev->pNext = pBwMgr->pNext;
649	}
650
651	rc = RTCritSectLeave(&pEpClass->CritSect); AssertRC(rc);
652	}
653	#endif /* SOME_UNUSED_FUNCTION */
654
655
656	/** Lazy coder. */
657	static int pdmacAsyncCompletionBwMgrCreate(PPDMASYNCCOMPLETIONEPCLASS pEpClass, const char *pszBwMgr, uint32_t cbTransferPerSecMax,
658	uint32_t cbTransferPerSecStart, uint32_t cbTransferPerSecStep)
659	{
660	LogFlowFunc(("pEpClass=%#p pszBwMgr=%#p{%s} cbTransferPerSecMax=%u cbTransferPerSecStart=%u cbTransferPerSecStep=%u\n",
661	pEpClass, pszBwMgr, pszBwMgr, cbTransferPerSecMax, cbTransferPerSecStart, cbTransferPerSecStep));
662
663	AssertPtrReturn(pEpClass, VERR_INVALID_POINTER);
664	AssertPtrReturn(pszBwMgr, VERR_INVALID_POINTER);
665	AssertReturn(*pszBwMgr != '\0', VERR_INVALID_PARAMETER);
666
667	int rc;
668	PPDMACBWMGR pBwMgr = pdmacBwMgrFindById(pEpClass, pszBwMgr);
669	if (!pBwMgr)
670	{
671	rc = MMR3HeapAllocZEx(pEpClass->pVM, MM_TAG_PDM_ASYNC_COMPLETION,
672	sizeof(PDMACBWMGR),
673	(void **)&pBwMgr);
674	if (RT_SUCCESS(rc))
675	{
676	pBwMgr->pszId = RTStrDup(pszBwMgr);
677	if (pBwMgr->pszId)
678	{
679	pBwMgr->pEpClass = pEpClass;
680	pBwMgr->cRefs = 0;
681
682	/* Init I/O flow control. */
683	pBwMgr->cbTransferPerSecMax = cbTransferPerSecMax;
684	pBwMgr->cbTransferPerSecStart = cbTransferPerSecStart;
685	pBwMgr->cbTransferPerSecStep = cbTransferPerSecStep;
686
687	pBwMgr->cbTransferAllowed = pBwMgr->cbTransferPerSecStart;
688	pBwMgr->tsUpdatedLast = RTTimeSystemNanoTS();
689
690	pdmacBwMgrLink(pBwMgr);
691	rc = VINF_SUCCESS;
692	}
693	else
694	{
695	rc = VERR_NO_MEMORY;
696	MMR3HeapFree(pBwMgr);
697	}
698	}
699	}
700	else
701	rc = VERR_ALREADY_EXISTS;
702
703	LogFlowFunc(("returns rc=%Rrc\n", rc));
704	return rc;
705	}
706
707
708	/** Lazy coder. */
709	DECLINLINE(void) pdmacBwMgrRetain(PPDMACBWMGR pBwMgr)
710	{
711	ASMAtomicIncU32(&pBwMgr->cRefs);
712	}
713
714
715	/** Lazy coder. */
716	DECLINLINE(void) pdmacBwMgrRelease(PPDMACBWMGR pBwMgr)
717	{
718	Assert(pBwMgr->cRefs > 0);
719	ASMAtomicDecU32(&pBwMgr->cRefs);
720	}
721
722
723	/**
724	* Checks if the endpoint is allowed to transfer the given amount of bytes.
725	*
726	* @returns true if the endpoint is allowed to transfer the data.
727	* false otherwise
728	* @param pEndpoint The endpoint.
729	* @param cbTransfer The number of bytes to transfer.
730	* @param pmsWhenNext Where to store the number of milliseconds
731	* until the bandwidth is refreshed.
732	* Only set if false is returned.
733	*/
734	bool pdmacEpIsTransferAllowed(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, uint32_t cbTransfer, RTMSINTERVAL *pmsWhenNext)
735	{
736	bool fAllowed = true;
737	PPDMACBWMGR pBwMgr = ASMAtomicReadPtrT(&pEndpoint->pBwMgr, PPDMACBWMGR);
738
739	LogFlowFunc(("pEndpoint=%p pBwMgr=%p cbTransfer=%u\n", pEndpoint, pBwMgr, cbTransfer));
740
741	if (pBwMgr)
742	{
743	uint32_t cbOld = ASMAtomicSubU32(&pBwMgr->cbTransferAllowed, cbTransfer);
744	if (RT_LIKELY(cbOld >= cbTransfer))
745	fAllowed = true;
746	else
747	{
748	fAllowed = false;
749
750	/* We are out of resources Check if we can update again. */
751	uint64_t tsNow = RTTimeSystemNanoTS();
752	uint64_t tsUpdatedLast = ASMAtomicUoReadU64(&pBwMgr->tsUpdatedLast);
753
754	if (tsNow - tsUpdatedLast >= (100010001000))
755	{
756	if (ASMAtomicCmpXchgU64(&pBwMgr->tsUpdatedLast, tsNow, tsUpdatedLast))
757	{
758	if (pBwMgr->cbTransferPerSecStart < pBwMgr->cbTransferPerSecMax)
759	{
760	pBwMgr->cbTransferPerSecStart = RT_MIN(pBwMgr->cbTransferPerSecMax, pBwMgr->cbTransferPerSecStart + pBwMgr->cbTransferPerSecStep);
761	LogFlow(("AIOMgr: Increasing maximum bandwidth to %u bytes/sec\n", pBwMgr->cbTransferPerSecStart));
762	}
763
764	/* Update */
765	uint32_t cbTransferAllowedNew = pBwMgr->cbTransferPerSecStart > cbTransfer
766	? pBwMgr->cbTransferPerSecStart - cbTransfer
767	: 0;
768	ASMAtomicWriteU32(&pBwMgr->cbTransferAllowed, cbTransferAllowedNew);
769	fAllowed = true;
770	LogFlow(("AIOMgr: Refreshed bandwidth\n"));
771	}
772	}
773	else
774	{
775	ASMAtomicAddU32(&pBwMgr->cbTransferAllowed, cbTransfer);
776	pmsWhenNext = ((100010001000) - (tsNow - tsUpdatedLast)) / (10001000);
777	}
778	}
779	}
780
781	LogFlowFunc(("fAllowed=%RTbool\n", fAllowed));
782	return fAllowed;
783	}
784
785
786	/**
787	* Called by the endpoint if a task has finished.
788	*
789	* @param pTask Pointer to the finished task.
790	* @param rc Status code of the completed request.
791	* @param fCallCompletionHandler Flag whether the completion handler should be called to
792	* inform the owner of the task that it has completed.
793	*/
794	void pdmR3AsyncCompletionCompleteTask(PPDMASYNCCOMPLETIONTASK pTask, int rc, bool fCallCompletionHandler)
795	{
796	LogFlow(("%s: pTask=%#p fCallCompletionHandler=%RTbool\n", __FUNCTION__, pTask, fCallCompletionHandler));
797
798	if (fCallCompletionHandler)
799	{
800	PPDMASYNCCOMPLETIONTEMPLATE pTemplate = pTask->pEndpoint->pTemplate;
801
802	switch (pTemplate->enmType)
803	{
804	case PDMASYNCCOMPLETIONTEMPLATETYPE_DEV:
805	pTemplate->u.Dev.pfnCompleted(pTemplate->u.Dev.pDevIns, pTask->pvUser, rc);
806	break;
807
808	case PDMASYNCCOMPLETIONTEMPLATETYPE_DRV:
809	pTemplate->u.Drv.pfnCompleted(pTemplate->u.Drv.pDrvIns, pTemplate->u.Drv.pvTemplateUser, pTask->pvUser, rc);
810	break;
811
812	case PDMASYNCCOMPLETIONTEMPLATETYPE_USB:
813	pTemplate->u.Usb.pfnCompleted(pTemplate->u.Usb.pUsbIns, pTask->pvUser, rc);
814	break;
815
816	case PDMASYNCCOMPLETIONTEMPLATETYPE_INTERNAL:
817	pTemplate->u.Int.pfnCompleted(pTemplate->pVM, pTask->pvUser, pTemplate->u.Int.pvUser, rc);
818	break;
819
820	default:
821	AssertMsgFailed(("Unknown template type!\n"));
822	}
823	}
824
825	pdmR3AsyncCompletionPutTask(pTask->pEndpoint, pTask);
826	}
827
828
829	/**
830	* Worker initializing a endpoint class.
831	*
832	* @returns VBox status code.
833	* @param pVM The cross context VM structure.
834	* @param pEpClassOps Pointer to the endpoint class structure.
835	* @param pCfgHandle Pointer to the CFGM tree.
836	*/
837	static int pdmR3AsyncCompletionEpClassInit(PVM pVM, PCPDMASYNCCOMPLETIONEPCLASSOPS pEpClassOps, PCFGMNODE pCfgHandle)
838	{
839	/* Validate input. */
840	AssertPtrReturn(pEpClassOps, VERR_INVALID_POINTER);
841	AssertReturn(pEpClassOps->u32Version == PDMAC_EPCLASS_OPS_VERSION, VERR_VERSION_MISMATCH);
842	AssertReturn(pEpClassOps->u32VersionEnd == PDMAC_EPCLASS_OPS_VERSION, VERR_VERSION_MISMATCH);
843
844	LogFlow(("pdmR3AsyncCompletionEpClassInit: pVM=%p pEpClassOps=%p{%s}\n", pVM, pEpClassOps, pEpClassOps->pszName));
845
846	/* Allocate global class data. */
847	PPDMASYNCCOMPLETIONEPCLASS pEndpointClass = NULL;
848
849	int rc = MMR3HeapAllocZEx(pVM, MM_TAG_PDM_ASYNC_COMPLETION,
850	pEpClassOps->cbEndpointClassGlobal,
851	(void **)&pEndpointClass);
852	if (RT_SUCCESS(rc))
853	{
854	/* Initialize common data. */
855	pEndpointClass->pVM = pVM;
856	pEndpointClass->pEndpointOps = pEpClassOps;
857
858	rc = RTCritSectInit(&pEndpointClass->CritSect);
859	if (RT_SUCCESS(rc))
860	{
861	PCFGMNODE pCfgNodeClass = CFGMR3GetChild(pCfgHandle, pEpClassOps->pszName);
862
863	/* Create task cache */
864	rc = RTMemCacheCreate(&pEndpointClass->hMemCacheTasks, pEpClassOps->cbTask,
865	0, UINT32_MAX, NULL, NULL, NULL, 0);
866	if (RT_SUCCESS(rc))
867	{
868	/* Call the specific endpoint class initializer. */
869	rc = pEpClassOps->pfnInitialize(pEndpointClass, pCfgNodeClass);
870	if (RT_SUCCESS(rc))
871	{
872	/* Create all bandwidth groups for resource control. */
873	PCFGMNODE pCfgBwGrp = CFGMR3GetChild(pCfgNodeClass, "BwGroups");
874	if (pCfgBwGrp)
875	{
876	for (PCFGMNODE pCur = CFGMR3GetFirstChild(pCfgBwGrp); pCur; pCur = CFGMR3GetNextChild(pCur))
877	{
878	size_t cbName = CFGMR3GetNameLen(pCur) + 1;
879	char pszBwGrpId = (char )RTMemAllocZ(cbName);
880	if (pszBwGrpId)
881	{
882	rc = CFGMR3GetName(pCur, pszBwGrpId, cbName);
883	if (RT_SUCCESS(rc))
884	{
885	uint32_t cbMax;
886	rc = CFGMR3QueryU32(pCur, "Max", &cbMax);
887	if (RT_SUCCESS(rc))
888	{
889	uint32_t cbStart;
890	rc = CFGMR3QueryU32Def(pCur, "Start", &cbStart, cbMax);
891	if (RT_SUCCESS(rc))
892	{
893	uint32_t cbStep;
894	rc = CFGMR3QueryU32Def(pCur, "Step", &cbStep, 0);
895	if (RT_SUCCESS(rc))
896	rc = pdmacAsyncCompletionBwMgrCreate(pEndpointClass, pszBwGrpId,
897	cbMax, cbStart, cbStep);
898	}
899	}
900	}
901	RTMemFree(pszBwGrpId);
902	}
903	else
904	rc = VERR_NO_MEMORY;
905	if (RT_FAILURE(rc))
906	break;
907	}
908	}
909	if (RT_SUCCESS(rc))
910	{
911	PUVM pUVM = pVM->pUVM;
912	AssertMsg(!pUVM->pdm.s.apAsyncCompletionEndpointClass[pEpClassOps->enmClassType],
913	("Endpoint class was already initialized\n"));
914
915	#ifdef VBOX_WITH_STATISTICS
916	CFGMR3QueryBoolDef(pCfgNodeClass, "AdvancedStatistics", &pEndpointClass->fGatherAdvancedStatistics, true);
917	#else
918	CFGMR3QueryBoolDef(pCfgNodeClass, "AdvancedStatistics", &pEndpointClass->fGatherAdvancedStatistics, false);
919	#endif
920
921	pUVM->pdm.s.apAsyncCompletionEndpointClass[pEpClassOps->enmClassType] = pEndpointClass;
922	LogFlowFunc((": Initialized endpoint class \"%s\" rc=%Rrc\n", pEpClassOps->pszName, rc));
923	return VINF_SUCCESS;
924	}
925	}
926	RTMemCacheDestroy(pEndpointClass->hMemCacheTasks);
927	}
928	RTCritSectDelete(&pEndpointClass->CritSect);
929	}
930	MMR3HeapFree(pEndpointClass);
931	}
932
933	LogFlowFunc((": Failed to initialize endpoint class rc=%Rrc\n", rc));
934
935	return rc;
936	}
937
938
939	/**
940	* Worker terminating all endpoint classes.
941	*
942	* @param pEndpointClass Pointer to the endpoint class to terminate.
943	*
944	* @remarks This method ensures that any still open endpoint is closed.
945	*/
946	static void pdmR3AsyncCompletionEpClassTerminate(PPDMASYNCCOMPLETIONEPCLASS pEndpointClass)
947	{
948	PVM pVM = pEndpointClass->pVM;
949
950	/* Close all still open endpoints. */
951	while (pEndpointClass->pEndpointsHead)
952	PDMR3AsyncCompletionEpClose(pEndpointClass->pEndpointsHead);
953
954	/* Destroy the bandwidth managers. */
955	PPDMACBWMGR pBwMgr = pEndpointClass->pBwMgrsHead;
956	while (pBwMgr)
957	{
958	PPDMACBWMGR pFree = pBwMgr;
959	pBwMgr = pBwMgr->pNext;
960	MMR3HeapFree(pFree);
961	}
962
963	/* Call the termination callback of the class. */
964	pEndpointClass->pEndpointOps->pfnTerminate(pEndpointClass);
965
966	RTMemCacheDestroy(pEndpointClass->hMemCacheTasks);
967	RTCritSectDelete(&pEndpointClass->CritSect);
968
969	/* Free the memory of the class finally and clear the entry in the class array. */
970	pVM->pUVM->pdm.s.apAsyncCompletionEndpointClass[pEndpointClass->pEndpointOps->enmClassType] = NULL;
971	MMR3HeapFree(pEndpointClass);
972	}
973
974
975	/**
976	* Records the size of the request in the statistics.
977	*
978	* @param pEndpoint The endpoint to register the request size for.
979	* @param cbReq Size of the request.
980	*/
981	static void pdmR3AsyncCompletionStatisticsRecordSize(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, size_t cbReq)
982	{
983	if (cbReq < 512)
984	STAM_REL_COUNTER_INC(&pEndpoint->StatReqSizeSmaller512);
985	else if (cbReq < _1K)
986	STAM_REL_COUNTER_INC(&pEndpoint->StatReqSize512To1K);
987	else if (cbReq < _2K)
988	STAM_REL_COUNTER_INC(&pEndpoint->StatReqSize1KTo2K);
989	else if (cbReq < _4K)
990	STAM_REL_COUNTER_INC(&pEndpoint->StatReqSize2KTo4K);
991	else if (cbReq < _8K)
992	STAM_REL_COUNTER_INC(&pEndpoint->StatReqSize4KTo8K);
993	else if (cbReq < _16K)
994	STAM_REL_COUNTER_INC(&pEndpoint->StatReqSize8KTo16K);
995	else if (cbReq < _32K)
996	STAM_REL_COUNTER_INC(&pEndpoint->StatReqSize16KTo32K);
997	else if (cbReq < _64K)
998	STAM_REL_COUNTER_INC(&pEndpoint->StatReqSize32KTo64K);
999	else if (cbReq < _128K)
1000	STAM_REL_COUNTER_INC(&pEndpoint->StatReqSize64KTo128K);
1001	else if (cbReq < _256K)
1002	STAM_REL_COUNTER_INC(&pEndpoint->StatReqSize128KTo256K);
1003	else if (cbReq < _512K)
1004	STAM_REL_COUNTER_INC(&pEndpoint->StatReqSize256KTo512K);
1005	else
1006	STAM_REL_COUNTER_INC(&pEndpoint->StatReqSizeOver512K);
1007
1008	if (cbReq & ((size_t)512 - 1))
1009	STAM_REL_COUNTER_INC(&pEndpoint->StatReqsUnaligned512);
1010	else if (cbReq & ((size_t)_4K - 1))
1011	STAM_REL_COUNTER_INC(&pEndpoint->StatReqsUnaligned4K);
1012	else if (cbReq & ((size_t)_8K - 1))
1013	STAM_REL_COUNTER_INC(&pEndpoint->StatReqsUnaligned8K);
1014	}
1015
1016
1017	/**
1018	* Records the required processing time of a request.
1019	*
1020	* @param pEndpoint The endpoint.
1021	* @param cNsRun The request time in nanoseconds.
1022	*/
1023	static void pdmR3AsyncCompletionStatisticsRecordCompletionTime(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, uint64_t cNsRun)
1024	{
1025	PSTAMCOUNTER pStatCounter;
1026	if (cNsRun < RT_NS_1US)
1027	pStatCounter = &pEndpoint->StatTaskRunTimesNs[cNsRun / (RT_NS_1US / 10)];
1028	else if (cNsRun < RT_NS_1MS)
1029	pStatCounter = &pEndpoint->StatTaskRunTimesUs[cNsRun / (RT_NS_1MS / 10)];
1030	else if (cNsRun < RT_NS_1SEC)
1031	pStatCounter = &pEndpoint->StatTaskRunTimesMs[cNsRun / (RT_NS_1SEC / 10)];
1032	else if (cNsRun < RT_NS_1SEC_64*100)
1033	pStatCounter = &pEndpoint->StatTaskRunTimesSec[cNsRun / (RT_NS_1SEC_64*100 / 10)];
1034	else
1035	pStatCounter = &pEndpoint->StatTaskRunOver100Sec;
1036	STAM_REL_COUNTER_INC(pStatCounter);
1037
1038	STAM_REL_COUNTER_INC(&pEndpoint->StatIoOpsCompleted);
1039	pEndpoint->cIoOpsCompleted++;
1040	uint64_t tsMsCur = RTTimeMilliTS();
1041	uint64_t tsInterval = tsMsCur - pEndpoint->tsIntervalStartMs;
1042	if (tsInterval >= 1000)
1043	{
1044	pEndpoint->StatIoOpsPerSec.c = pEndpoint->cIoOpsCompleted / (tsInterval / 1000);
1045	pEndpoint->tsIntervalStartMs = tsMsCur;
1046	pEndpoint->cIoOpsCompleted = 0;
1047	}
1048	}
1049
1050
1051	/**
1052	* Registers advanced statistics for the given endpoint.
1053	*
1054	* @returns VBox status code.
1055	* @param pEndpoint The endpoint to register the advanced statistics for.
1056	*/
1057	static int pdmR3AsyncCompletionStatisticsRegister(PPDMASYNCCOMPLETIONENDPOINT pEndpoint)
1058	{
1059	int rc = VINF_SUCCESS;
1060	PVM pVM = pEndpoint->pEpClass->pVM;
1061
1062	pEndpoint->tsIntervalStartMs = RTTimeMilliTS();
1063
1064	for (unsigned i = 0; i < RT_ELEMENTS(pEndpoint->StatTaskRunTimesNs) && RT_SUCCESS(rc); i++)
1065	rc = STAMR3RegisterF(pVM, &pEndpoint->StatTaskRunTimesNs[i], STAMTYPE_COUNTER,
1066	STAMVISIBILITY_USED, STAMUNIT_OCCURENCES,
1067	"Nanosecond resolution runtime statistics",
1068	"/PDM/AsyncCompletion/File/%s/%d/TaskRun1Ns-%u-%u",
1069	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId, i100, i100+100-1);
1070
1071	for (unsigned i = 0; i < RT_ELEMENTS(pEndpoint->StatTaskRunTimesUs) && RT_SUCCESS(rc); i++)
1072	rc = STAMR3RegisterF(pVM, &pEndpoint->StatTaskRunTimesUs[i], STAMTYPE_COUNTER,
1073	STAMVISIBILITY_USED, STAMUNIT_OCCURENCES,
1074	"Microsecond resolution runtime statistics",
1075	"/PDM/AsyncCompletion/File/%s/%d/TaskRun2MicroSec-%u-%u",
1076	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId, i100, i100+100-1);
1077
1078	for (unsigned i = 0; i < RT_ELEMENTS(pEndpoint->StatTaskRunTimesMs) && RT_SUCCESS(rc); i++)
1079	rc = STAMR3RegisterF(pVM, &pEndpoint->StatTaskRunTimesMs[i], STAMTYPE_COUNTER,
1080	STAMVISIBILITY_USED, STAMUNIT_OCCURENCES,
1081	"Milliseconds resolution runtime statistics",
1082	"/PDM/AsyncCompletion/File/%s/%d/TaskRun3Ms-%u-%u",
1083	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId, i100, i100+100-1);
1084
1085	for (unsigned i = 0; i < RT_ELEMENTS(pEndpoint->StatTaskRunTimesMs) && RT_SUCCESS(rc); i++)
1086	rc = STAMR3RegisterF(pVM, &pEndpoint->StatTaskRunTimesSec[i], STAMTYPE_COUNTER,
1087	STAMVISIBILITY_USED, STAMUNIT_OCCURENCES,
1088	"Second resolution runtime statistics",
1089	"/PDM/AsyncCompletion/File/%s/%d/TaskRun4Sec-%u-%u",
1090	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId, i10, i10+10-1);
1091
1092	if (RT_SUCCESS(rc))
1093	rc = STAMR3RegisterF(pVM, &pEndpoint->StatTaskRunOver100Sec, STAMTYPE_COUNTER,
1094	STAMVISIBILITY_USED, STAMUNIT_OCCURENCES,
1095	"Tasks which ran more than 100sec",
1096	"/PDM/AsyncCompletion/File/%s/%d/TaskRunSecGreater100Sec",
1097	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1098
1099	if (RT_SUCCESS(rc))
1100	rc = STAMR3RegisterF(pVM, &pEndpoint->StatIoOpsPerSec, STAMTYPE_COUNTER,
1101	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1102	"Processed I/O operations per second",
1103	"/PDM/AsyncCompletion/File/%s/%d/IoOpsPerSec",
1104	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1105
1106	if (RT_SUCCESS(rc))
1107	rc = STAMR3RegisterF(pVM, &pEndpoint->StatIoOpsStarted, STAMTYPE_COUNTER,
1108	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1109	"Started I/O operations for this endpoint",
1110	"/PDM/AsyncCompletion/File/%s/%d/IoOpsStarted",
1111	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1112
1113	if (RT_SUCCESS(rc))
1114	rc = STAMR3RegisterF(pVM, &pEndpoint->StatIoOpsCompleted, STAMTYPE_COUNTER,
1115	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1116	"Completed I/O operations for this endpoint",
1117	"/PDM/AsyncCompletion/File/%s/%d/IoOpsCompleted",
1118	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1119
1120	if (RT_SUCCESS(rc))
1121	rc = STAMR3RegisterF(pVM, &pEndpoint->StatReqSizeSmaller512, STAMTYPE_COUNTER,
1122	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1123	"Number of requests with a size smaller than 512 bytes",
1124	"/PDM/AsyncCompletion/File/%s/%d/ReqSizeSmaller512",
1125	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1126
1127	if (RT_SUCCESS(rc))
1128	rc = STAMR3RegisterF(pVM, &pEndpoint->StatReqSize512To1K, STAMTYPE_COUNTER,
1129	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1130	"Number of requests with a size between 512 bytes and 1KB",
1131	"/PDM/AsyncCompletion/File/%s/%d/ReqSize512To1K",
1132	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1133
1134	if (RT_SUCCESS(rc))
1135	rc = STAMR3RegisterF(pVM, &pEndpoint->StatReqSize1KTo2K, STAMTYPE_COUNTER,
1136	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1137	"Number of requests with a size between 1KB and 2KB",
1138	"/PDM/AsyncCompletion/File/%s/%d/ReqSize1KTo2K",
1139	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1140
1141	if (RT_SUCCESS(rc))
1142	rc = STAMR3RegisterF(pVM, &pEndpoint->StatReqSize2KTo4K, STAMTYPE_COUNTER,
1143	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1144	"Number of requests with a size between 2KB and 4KB",
1145	"/PDM/AsyncCompletion/File/%s/%d/ReqSize2KTo4K",
1146	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1147
1148	if (RT_SUCCESS(rc))
1149	rc = STAMR3RegisterF(pVM, &pEndpoint->StatReqSize4KTo8K, STAMTYPE_COUNTER,
1150	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1151	"Number of requests with a size between 4KB and 8KB",
1152	"/PDM/AsyncCompletion/File/%s/%d/ReqSize4KTo8K",
1153	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1154
1155	if (RT_SUCCESS(rc))
1156	rc = STAMR3RegisterF(pVM, &pEndpoint->StatReqSize8KTo16K, STAMTYPE_COUNTER,
1157	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1158	"Number of requests with a size between 8KB and 16KB",
1159	"/PDM/AsyncCompletion/File/%s/%d/ReqSize8KTo16K",
1160	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1161
1162	if (RT_SUCCESS(rc))
1163	rc = STAMR3RegisterF(pVM, &pEndpoint->StatReqSize16KTo32K, STAMTYPE_COUNTER,
1164	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1165	"Number of requests with a size between 16KB and 32KB",
1166	"/PDM/AsyncCompletion/File/%s/%d/ReqSize16KTo32K",
1167	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1168
1169	if (RT_SUCCESS(rc))
1170	rc = STAMR3RegisterF(pVM, &pEndpoint->StatReqSize32KTo64K, STAMTYPE_COUNTER,
1171	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1172	"Number of requests with a size between 32KB and 64KB",
1173	"/PDM/AsyncCompletion/File/%s/%d/ReqSize32KTo64K",
1174	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1175
1176	if (RT_SUCCESS(rc))
1177	rc = STAMR3RegisterF(pVM, &pEndpoint->StatReqSize64KTo128K, STAMTYPE_COUNTER,
1178	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1179	"Number of requests with a size between 64KB and 128KB",
1180	"/PDM/AsyncCompletion/File/%s/%d/ReqSize64KTo128K",
1181	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1182
1183	if (RT_SUCCESS(rc))
1184	rc = STAMR3RegisterF(pVM, &pEndpoint->StatReqSize128KTo256K, STAMTYPE_COUNTER,
1185	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1186	"Number of requests with a size between 128KB and 256KB",
1187	"/PDM/AsyncCompletion/File/%s/%d/ReqSize128KTo256K",
1188	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1189
1190	if (RT_SUCCESS(rc))
1191	rc = STAMR3RegisterF(pVM, &pEndpoint->StatReqSize256KTo512K, STAMTYPE_COUNTER,
1192	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1193	"Number of requests with a size between 256KB and 512KB",
1194	"/PDM/AsyncCompletion/File/%s/%d/ReqSize256KTo512K",
1195	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1196
1197	if (RT_SUCCESS(rc))
1198	rc = STAMR3RegisterF(pVM, &pEndpoint->StatReqSizeOver512K, STAMTYPE_COUNTER,
1199	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1200	"Number of requests with a size over 512KB",
1201	"/PDM/AsyncCompletion/File/%s/%d/ReqSizeOver512K",
1202	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1203
1204	if (RT_SUCCESS(rc))
1205	rc = STAMR3RegisterF(pVM, &pEndpoint->StatReqsUnaligned512, STAMTYPE_COUNTER,
1206	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1207	"Number of requests which size is not aligned to 512 bytes",
1208	"/PDM/AsyncCompletion/File/%s/%d/ReqsUnaligned512",
1209	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1210
1211	if (RT_SUCCESS(rc))
1212	rc = STAMR3RegisterF(pVM, &pEndpoint->StatReqsUnaligned4K, STAMTYPE_COUNTER,
1213	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1214	"Number of requests which size is not aligned to 4KB",
1215	"/PDM/AsyncCompletion/File/%s/%d/ReqsUnaligned4K",
1216	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1217
1218	if (RT_SUCCESS(rc))
1219	rc = STAMR3RegisterF(pVM, &pEndpoint->StatReqsUnaligned8K, STAMTYPE_COUNTER,
1220	STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES,
1221	"Number of requests which size is not aligned to 8KB",
1222	"/PDM/AsyncCompletion/File/%s/%d/ReqsUnaligned8K",
1223	RTPathFilename(pEndpoint->pszUri), pEndpoint->iStatId);
1224
1225	return rc;
1226	}
1227
1228
1229	/**
1230	* Deregisters advanced statistics for one endpoint.
1231	*
1232	* @param pEndpoint The endpoint to deregister the advanced statistics for.
1233	*/
1234	static void pdmR3AsyncCompletionStatisticsDeregister(PPDMASYNCCOMPLETIONENDPOINT pEndpoint)
1235	{
1236	/* I hope this doesn't remove too much... */
1237	STAMR3DeregisterF(pEndpoint->pEpClass->pVM->pUVM, "/PDM/AsyncCompletion/File/%s/*", RTPathFilename(pEndpoint->pszUri));
1238	}
1239
1240
1241	/**
1242	* Initialize the async completion manager.
1243	*
1244	* @returns VBox status code
1245	* @param pVM The cross context VM structure.
1246	*/
1247	int pdmR3AsyncCompletionInit(PVM pVM)
1248	{
1249	LogFlowFunc((": pVM=%p\n", pVM));
1250
1251	VM_ASSERT_EMT(pVM);
1252
1253	PCFGMNODE pCfgRoot = CFGMR3GetRoot(pVM);
1254	PCFGMNODE pCfgAsyncCompletion = CFGMR3GetChild(CFGMR3GetChild(pCfgRoot, "PDM"), "AsyncCompletion");
1255
1256	int rc = pdmR3AsyncCompletionEpClassInit(pVM, &g_PDMAsyncCompletionEndpointClassFile, pCfgAsyncCompletion);
1257	LogFlowFunc((": pVM=%p rc=%Rrc\n", pVM, rc));
1258	return rc;
1259	}
1260
1261
1262	/**
1263	* Terminates the async completion manager.
1264	*
1265	* @returns VBox status code
1266	* @param pVM The cross context VM structure.
1267	*/
1268	int pdmR3AsyncCompletionTerm(PVM pVM)
1269	{
1270	LogFlowFunc((": pVM=%p\n", pVM));
1271	PUVM pUVM = pVM->pUVM;
1272
1273	for (size_t i = 0; i < RT_ELEMENTS(pUVM->pdm.s.apAsyncCompletionEndpointClass); i++)
1274	if (pUVM->pdm.s.apAsyncCompletionEndpointClass[i])
1275	pdmR3AsyncCompletionEpClassTerminate(pUVM->pdm.s.apAsyncCompletionEndpointClass[i]);
1276
1277	return VINF_SUCCESS;
1278	}
1279
1280
1281	/**
1282	* Resume worker for the async completion manager.
1283	*
1284	* @param pVM The cross context VM structure.
1285	*/
1286	void pdmR3AsyncCompletionResume(PVM pVM)
1287	{
1288	LogFlowFunc((": pVM=%p\n", pVM));
1289	PUVM pUVM = pVM->pUVM;
1290
1291	/* Log the bandwidth groups and all assigned endpoints. */
1292	for (size_t i = 0; i < RT_ELEMENTS(pUVM->pdm.s.apAsyncCompletionEndpointClass); i++)
1293	if (pUVM->pdm.s.apAsyncCompletionEndpointClass[i])
1294	{
1295	PPDMASYNCCOMPLETIONEPCLASS pEpClass = pUVM->pdm.s.apAsyncCompletionEndpointClass[i];
1296	PPDMACBWMGR pBwMgr = pEpClass->pBwMgrsHead;
1297	PPDMASYNCCOMPLETIONENDPOINT pEp;
1298
1299	if (pBwMgr)
1300	LogRel(("AIOMgr: Bandwidth groups for class '%s'\n", i == PDMASYNCCOMPLETIONEPCLASSTYPE_FILE
1301	? "File" : "<Unknown>"));
1302
1303	while (pBwMgr)
1304	{
1305	LogRel(("AIOMgr: Id: %s\n", pBwMgr->pszId));
1306	LogRel(("AIOMgr: Max: %u B/s\n", pBwMgr->cbTransferPerSecMax));
1307	LogRel(("AIOMgr: Start: %u B/s\n", pBwMgr->cbTransferPerSecStart));
1308	LogRel(("AIOMgr: Step: %u B/s\n", pBwMgr->cbTransferPerSecStep));
1309	LogRel(("AIOMgr: Endpoints:\n"));
1310
1311	pEp = pEpClass->pEndpointsHead;
1312	while (pEp)
1313	{
1314	if (pEp->pBwMgr == pBwMgr)
1315	LogRel(("AIOMgr: %s\n", pEp->pszUri));
1316
1317	pEp = pEp->pNext;
1318	}
1319
1320	pBwMgr = pBwMgr->pNext;
1321	}
1322
1323	/* Print all endpoints without assigned bandwidth groups. */
1324	pEp = pEpClass->pEndpointsHead;
1325	if (pEp)
1326	LogRel(("AIOMgr: Endpoints without assigned bandwidth groups:\n"));
1327
1328	while (pEp)
1329	{
1330	if (!pEp->pBwMgr)
1331	LogRel(("AIOMgr: %s\n", pEp->pszUri));
1332
1333	pEp = pEp->pNext;
1334	}
1335	}
1336	}
1337
1338
1339	/**
1340	* Tries to get a free task from the endpoint or class cache
1341	* allocating the task if it fails.
1342	*
1343	* @returns Pointer to a new and initialized task or NULL
1344	* @param pEndpoint The endpoint the task is for.
1345	* @param pvUser Opaque user data for the task.
1346	*/
1347	static PPDMASYNCCOMPLETIONTASK pdmR3AsyncCompletionGetTask(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, void *pvUser)
1348	{
1349	PPDMASYNCCOMPLETIONEPCLASS pEndpointClass = pEndpoint->pEpClass;
1350	PPDMASYNCCOMPLETIONTASK pTask = (PPDMASYNCCOMPLETIONTASK)RTMemCacheAlloc(pEndpointClass->hMemCacheTasks);
1351	if (RT_LIKELY(pTask))
1352	{
1353	/* Initialize common parts. */
1354	pTask->pvUser = pvUser;
1355	pTask->pEndpoint = pEndpoint;
1356	/* Clear list pointers for safety. */
1357	pTask->pPrev = NULL;
1358	pTask->pNext = NULL;
1359	pTask->tsNsStart = RTTimeNanoTS();
1360	STAM_REL_COUNTER_INC(&pEndpoint->StatIoOpsStarted);
1361	}
1362
1363	return pTask;
1364	}
1365
1366
1367	/**
1368	* Puts a task in one of the caches.
1369	*
1370	* @param pEndpoint The endpoint the task belongs to.
1371	* @param pTask The task to cache.
1372	*/
1373	static void pdmR3AsyncCompletionPutTask(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, PPDMASYNCCOMPLETIONTASK pTask)
1374	{
1375	PPDMASYNCCOMPLETIONEPCLASS pEndpointClass = pEndpoint->pEpClass;
1376	uint64_t cNsRun = RTTimeNanoTS() - pTask->tsNsStart;
1377
1378	if (RT_UNLIKELY(cNsRun >= RT_NS_10SEC))
1379	LogRel(("AsyncCompletion: Task %#p completed after %llu seconds\n", pTask, cNsRun / RT_NS_1SEC));
1380
1381	if (pEndpointClass->fGatherAdvancedStatistics)
1382	pdmR3AsyncCompletionStatisticsRecordCompletionTime(pEndpoint, cNsRun);
1383
1384	RTMemCacheFree(pEndpointClass->hMemCacheTasks, pTask);
1385	}
1386
1387
1388	static unsigned
1389	pdmR3AsyncCompletionGetStatId(PPDMASYNCCOMPLETIONEPCLASS pEndpointClass, const char *pszUri)
1390	{
1391	PPDMASYNCCOMPLETIONENDPOINT pEndpoint = pEndpointClass->pEndpointsHead;
1392	const char *pszFilename = RTPathFilename(pszUri);
1393	unsigned iStatId = 0;
1394
1395	while (pEndpoint)
1396	{
1397	if ( !RTStrCmp(RTPathFilename(pEndpoint->pszUri), pszFilename)
1398	&& pEndpoint->iStatId >= iStatId)
1399	iStatId = pEndpoint->iStatId + 1;
1400
1401	pEndpoint = pEndpoint->pNext;
1402	}
1403
1404	return iStatId;
1405	}
1406
1407	/**
1408	* Opens a file as an async completion endpoint.
1409	*
1410	* @returns VBox status code.
1411	* @param ppEndpoint Where to store the opaque endpoint handle on success.
1412	* @param pszFilename Path to the file which is to be opened. (UTF-8)
1413	* @param fFlags Open flags, see grp_pdmacep_file_flags.
1414	* @param pTemplate Handle to the completion callback template to use
1415	* for this end point.
1416	*/
1417	VMMR3DECL(int) PDMR3AsyncCompletionEpCreateForFile(PPPDMASYNCCOMPLETIONENDPOINT ppEndpoint,
1418	const char *pszFilename, uint32_t fFlags,
1419	PPDMASYNCCOMPLETIONTEMPLATE pTemplate)
1420	{
1421	LogFlowFunc((": ppEndpoint=%p pszFilename=%p{%s} fFlags=%u pTemplate=%p\n",
1422	ppEndpoint, pszFilename, pszFilename, fFlags, pTemplate));
1423
1424	/* Sanity checks. */
1425	AssertPtrReturn(ppEndpoint, VERR_INVALID_POINTER);
1426	AssertPtrReturn(pszFilename, VERR_INVALID_POINTER);
1427	AssertPtrReturn(pTemplate, VERR_INVALID_POINTER);
1428
1429	/* Check that the flags are valid. */
1430	AssertReturn(((~(PDMACEP_FILE_FLAGS_READ_ONLY \| PDMACEP_FILE_FLAGS_DONT_LOCK \| PDMACEP_FILE_FLAGS_HOST_CACHE_ENABLED) & fFlags) == 0),
1431	VERR_INVALID_PARAMETER);
1432
1433	PVM pVM = pTemplate->pVM;
1434	PUVM pUVM = pVM->pUVM;
1435	PPDMASYNCCOMPLETIONEPCLASS pEndpointClass = pUVM->pdm.s.apAsyncCompletionEndpointClass[PDMASYNCCOMPLETIONEPCLASSTYPE_FILE];
1436	PPDMASYNCCOMPLETIONENDPOINT pEndpoint = NULL;
1437
1438	AssertMsg(pEndpointClass, ("File endpoint class was not initialized\n"));
1439
1440	/* Create an endpoint. */
1441	int rc = MMR3HeapAllocZEx(pVM, MM_TAG_PDM_ASYNC_COMPLETION,
1442	pEndpointClass->pEndpointOps->cbEndpoint,
1443	(void **)&pEndpoint);
1444	if (RT_SUCCESS(rc))
1445	{
1446	/* Initialize common parts. */
1447	pEndpoint->pNext = NULL;
1448	pEndpoint->pPrev = NULL;
1449	pEndpoint->pEpClass = pEndpointClass;
1450	pEndpoint->pTemplate = pTemplate;
1451	pEndpoint->pszUri = RTStrDup(pszFilename);
1452	pEndpoint->iStatId = pdmR3AsyncCompletionGetStatId(pEndpointClass, pszFilename);
1453	pEndpoint->pBwMgr = NULL;
1454
1455	if ( pEndpoint->pszUri
1456	&& RT_SUCCESS(rc))
1457	{
1458	/* Call the initializer for the endpoint. */
1459	rc = pEndpointClass->pEndpointOps->pfnEpInitialize(pEndpoint, pszFilename, fFlags);
1460	if (RT_SUCCESS(rc))
1461	{
1462	if (pEndpointClass->fGatherAdvancedStatistics)
1463	rc = pdmR3AsyncCompletionStatisticsRegister(pEndpoint);
1464
1465	if (RT_SUCCESS(rc))
1466	{
1467	/* Link it into the list of endpoints. */
1468	rc = RTCritSectEnter(&pEndpointClass->CritSect);
1469	AssertMsg(RT_SUCCESS(rc), ("Failed to enter critical section rc=%Rrc\n", rc));
1470
1471	pEndpoint->pNext = pEndpointClass->pEndpointsHead;
1472	if (pEndpointClass->pEndpointsHead)
1473	pEndpointClass->pEndpointsHead->pPrev = pEndpoint;
1474
1475	pEndpointClass->pEndpointsHead = pEndpoint;
1476	pEndpointClass->cEndpoints++;
1477
1478	rc = RTCritSectLeave(&pEndpointClass->CritSect);
1479	AssertMsg(RT_SUCCESS(rc), ("Failed to enter critical section rc=%Rrc\n", rc));
1480
1481	/* Reference the template. */
1482	ASMAtomicIncU32(&pTemplate->cUsed);
1483
1484	*ppEndpoint = pEndpoint;
1485	LogFlowFunc((": Created endpoint for %s\n", pszFilename));
1486	return VINF_SUCCESS;
1487	}
1488	else
1489	pEndpointClass->pEndpointOps->pfnEpClose(pEndpoint);
1490
1491	if (pEndpointClass->fGatherAdvancedStatistics)
1492	pdmR3AsyncCompletionStatisticsDeregister(pEndpoint);
1493	}
1494	RTStrFree(pEndpoint->pszUri);
1495	}
1496	MMR3HeapFree(pEndpoint);
1497	}
1498
1499	LogFlowFunc((": Creation of endpoint for %s failed: rc=%Rrc\n", pszFilename, rc));
1500	return rc;
1501	}
1502
1503
1504	/**
1505	* Closes a endpoint waiting for any pending tasks to finish.
1506	*
1507	* @param pEndpoint Handle of the endpoint.
1508	*/
1509	VMMR3DECL(void) PDMR3AsyncCompletionEpClose(PPDMASYNCCOMPLETIONENDPOINT pEndpoint)
1510	{
1511	LogFlowFunc((": pEndpoint=%p\n", pEndpoint));
1512
1513	/* Sanity checks. */
1514	AssertReturnVoid(RT_VALID_PTR(pEndpoint));
1515
1516	PPDMASYNCCOMPLETIONEPCLASS pEndpointClass = pEndpoint->pEpClass;
1517	pEndpointClass->pEndpointOps->pfnEpClose(pEndpoint);
1518
1519	/* Drop reference from the template. */
1520	ASMAtomicDecU32(&pEndpoint->pTemplate->cUsed);
1521
1522	/* Unlink the endpoint from the list. */
1523	int rc = RTCritSectEnter(&pEndpointClass->CritSect);
1524	AssertMsg(RT_SUCCESS(rc), ("Failed to enter critical section rc=%Rrc\n", rc));
1525
1526	PPDMASYNCCOMPLETIONENDPOINT pEndpointNext = pEndpoint->pNext;
1527	PPDMASYNCCOMPLETIONENDPOINT pEndpointPrev = pEndpoint->pPrev;
1528
1529	if (pEndpointPrev)
1530	pEndpointPrev->pNext = pEndpointNext;
1531	else
1532	pEndpointClass->pEndpointsHead = pEndpointNext;
1533	if (pEndpointNext)
1534	pEndpointNext->pPrev = pEndpointPrev;
1535
1536	pEndpointClass->cEndpoints--;
1537
1538	rc = RTCritSectLeave(&pEndpointClass->CritSect);
1539	AssertMsg(RT_SUCCESS(rc), ("Failed to enter critical section rc=%Rrc\n", rc));
1540
1541	if (pEndpointClass->fGatherAdvancedStatistics)
1542	pdmR3AsyncCompletionStatisticsDeregister(pEndpoint);
1543
1544	RTStrFree(pEndpoint->pszUri);
1545	MMR3HeapFree(pEndpoint);
1546	}
1547
1548
1549	/**
1550	* Creates a read task on the given endpoint.
1551	*
1552	* @returns VBox status code.
1553	* @param pEndpoint The file endpoint to read from.
1554	* @param off Where to start reading from.
1555	* @param paSegments Scatter gather list to store the data in.
1556	* @param cSegments Number of segments in the list.
1557	* @param cbRead The overall number of bytes to read.
1558	* @param pvUser Opaque user data returned in the completion callback
1559	* upon completion of the task.
1560	* @param ppTask Where to store the task handle on success.
1561	*/
1562	VMMR3DECL(int) PDMR3AsyncCompletionEpRead(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, RTFOFF off,
1563	PCRTSGSEG paSegments, unsigned cSegments,
1564	size_t cbRead, void *pvUser,
1565	PPPDMASYNCCOMPLETIONTASK ppTask)
1566	{
1567	AssertPtrReturn(pEndpoint, VERR_INVALID_POINTER);
1568	AssertPtrReturn(paSegments, VERR_INVALID_POINTER);
1569	AssertPtrReturn(ppTask, VERR_INVALID_POINTER);
1570	AssertReturn(cSegments > 0, VERR_INVALID_PARAMETER);
1571	AssertReturn(cbRead > 0, VERR_INVALID_PARAMETER);
1572	AssertReturn(off >= 0, VERR_INVALID_PARAMETER);
1573
1574	PPDMASYNCCOMPLETIONTASK pTask;
1575
1576	pTask = pdmR3AsyncCompletionGetTask(pEndpoint, pvUser);
1577	if (!pTask)
1578	return VERR_NO_MEMORY;
1579
1580	int rc = pEndpoint->pEpClass->pEndpointOps->pfnEpRead(pTask, pEndpoint, off,
1581	paSegments, cSegments, cbRead);
1582	if (RT_SUCCESS(rc))
1583	{
1584	if (pEndpoint->pEpClass->fGatherAdvancedStatistics)
1585	pdmR3AsyncCompletionStatisticsRecordSize(pEndpoint, cbRead);
1586
1587	*ppTask = pTask;
1588	}
1589	else
1590	pdmR3AsyncCompletionPutTask(pEndpoint, pTask);
1591
1592	return rc;
1593	}
1594
1595
1596	/**
1597	* Creates a write task on the given endpoint.
1598	*
1599	* @returns VBox status code.
1600	* @param pEndpoint The file endpoint to write to.
1601	* @param off Where to start writing at.
1602	* @param paSegments Scatter gather list of the data to write.
1603	* @param cSegments Number of segments in the list.
1604	* @param cbWrite The overall number of bytes to write.
1605	* @param pvUser Opaque user data returned in the completion callback
1606	* upon completion of the task.
1607	* @param ppTask Where to store the task handle on success.
1608	*/
1609	VMMR3DECL(int) PDMR3AsyncCompletionEpWrite(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, RTFOFF off,
1610	PCRTSGSEG paSegments, unsigned cSegments,
1611	size_t cbWrite, void *pvUser,
1612	PPPDMASYNCCOMPLETIONTASK ppTask)
1613	{
1614	AssertPtrReturn(pEndpoint, VERR_INVALID_POINTER);
1615	AssertPtrReturn(paSegments, VERR_INVALID_POINTER);
1616	AssertPtrReturn(ppTask, VERR_INVALID_POINTER);
1617	AssertReturn(cSegments > 0, VERR_INVALID_PARAMETER);
1618	AssertReturn(cbWrite > 0, VERR_INVALID_PARAMETER);
1619	AssertReturn(off >= 0, VERR_INVALID_PARAMETER);
1620
1621	PPDMASYNCCOMPLETIONTASK pTask;
1622
1623	pTask = pdmR3AsyncCompletionGetTask(pEndpoint, pvUser);
1624	if (!pTask)
1625	return VERR_NO_MEMORY;
1626
1627	int rc = pEndpoint->pEpClass->pEndpointOps->pfnEpWrite(pTask, pEndpoint, off,
1628	paSegments, cSegments, cbWrite);
1629	if (RT_SUCCESS(rc))
1630	{
1631	if (pEndpoint->pEpClass->fGatherAdvancedStatistics)
1632	pdmR3AsyncCompletionStatisticsRecordSize(pEndpoint, cbWrite);
1633
1634	*ppTask = pTask;
1635	}
1636	else
1637	pdmR3AsyncCompletionPutTask(pEndpoint, pTask);
1638
1639	return rc;
1640	}
1641
1642
1643	/**
1644	* Creates a flush task on the given endpoint.
1645	*
1646	* Every read and write task initiated before the flush task is
1647	* finished upon completion of this task.
1648	*
1649	* @returns VBox status code.
1650	* @param pEndpoint The file endpoint to flush.
1651	* @param pvUser Opaque user data returned in the completion callback
1652	* upon completion of the task.
1653	* @param ppTask Where to store the task handle on success.
1654	*/
1655	VMMR3DECL(int) PDMR3AsyncCompletionEpFlush(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, void *pvUser, PPPDMASYNCCOMPLETIONTASK ppTask)
1656	{
1657	AssertPtrReturn(pEndpoint, VERR_INVALID_POINTER);
1658	AssertPtrReturn(ppTask, VERR_INVALID_POINTER);
1659
1660	PPDMASYNCCOMPLETIONTASK pTask;
1661
1662	pTask = pdmR3AsyncCompletionGetTask(pEndpoint, pvUser);
1663	if (!pTask)
1664	return VERR_NO_MEMORY;
1665
1666	int rc = pEndpoint->pEpClass->pEndpointOps->pfnEpFlush(pTask, pEndpoint);
1667	if (RT_SUCCESS(rc))
1668	*ppTask = pTask;
1669	else
1670	pdmR3AsyncCompletionPutTask(pEndpoint, pTask);
1671
1672	return rc;
1673	}
1674
1675
1676	/**
1677	* Queries the size of an endpoint.
1678	*
1679	* Not that some endpoints may not support this and will return an error
1680	* (sockets for example).
1681	*
1682	* @returns VBox status code.
1683	* @retval VERR_NOT_SUPPORTED if the endpoint does not support this operation.
1684	* @param pEndpoint The file endpoint.
1685	* @param pcbSize Where to store the size of the endpoint.
1686	*/
1687	VMMR3DECL(int) PDMR3AsyncCompletionEpGetSize(PPDMASYNCCOMPLETIONENDPOINT pEndpoint,
1688	uint64_t *pcbSize)
1689	{
1690	AssertPtrReturn(pEndpoint, VERR_INVALID_POINTER);
1691	AssertPtrReturn(pcbSize, VERR_INVALID_POINTER);
1692
1693	if (pEndpoint->pEpClass->pEndpointOps->pfnEpGetSize)
1694	return pEndpoint->pEpClass->pEndpointOps->pfnEpGetSize(pEndpoint, pcbSize);
1695	return VERR_NOT_SUPPORTED;
1696	}
1697
1698
1699	/**
1700	* Sets the size of an endpoint.
1701	*
1702	* Not that some endpoints may not support this and will return an error
1703	* (sockets for example).
1704	*
1705	* @returns VBox status code.
1706	* @retval VERR_NOT_SUPPORTED if the endpoint does not support this operation.
1707	* @param pEndpoint The file endpoint.
1708	* @param cbSize The size to set.
1709	*
1710	* @note PDMR3AsyncCompletionEpFlush should be called before this operation is executed.
1711	*/
1712	VMMR3DECL(int) PDMR3AsyncCompletionEpSetSize(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, uint64_t cbSize)
1713	{
1714	AssertPtrReturn(pEndpoint, VERR_INVALID_POINTER);
1715
1716	if (pEndpoint->pEpClass->pEndpointOps->pfnEpSetSize)
1717	return pEndpoint->pEpClass->pEndpointOps->pfnEpSetSize(pEndpoint, cbSize);
1718	return VERR_NOT_SUPPORTED;
1719	}
1720
1721
1722	/**
1723	* Assigns or removes a bandwidth control manager to/from the endpoint.
1724	*
1725	* @returns VBox status code.
1726	* @param pEndpoint The endpoint.
1727	* @param pszBwMgr The identifer of the new bandwidth manager to assign
1728	* or NULL to remove the current one.
1729	*/
1730	VMMR3DECL(int) PDMR3AsyncCompletionEpSetBwMgr(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, const char *pszBwMgr)
1731	{
1732	AssertPtrReturn(pEndpoint, VERR_INVALID_POINTER);
1733	PPDMACBWMGR pBwMgrOld = NULL;
1734	PPDMACBWMGR pBwMgrNew = NULL;
1735
1736	int rc = VINF_SUCCESS;
1737	if (pszBwMgr)
1738	{
1739	pBwMgrNew = pdmacBwMgrFindById(pEndpoint->pEpClass, pszBwMgr);
1740	if (pBwMgrNew)
1741	pdmacBwMgrRetain(pBwMgrNew);
1742	else
1743	rc = VERR_NOT_FOUND;
1744	}
1745
1746	if (RT_SUCCESS(rc))
1747	{
1748	pBwMgrOld = ASMAtomicXchgPtrT(&pEndpoint->pBwMgr, pBwMgrNew, PPDMACBWMGR);
1749	if (pBwMgrOld)
1750	pdmacBwMgrRelease(pBwMgrOld);
1751	}
1752
1753	return rc;
1754	}
1755
1756
1757	/**
1758	* Cancels an async completion task.
1759	*
1760	* If you want to use this method, you have to take great create to make sure
1761	* you will never attempt cancel a task which has been completed. Since there is
1762	* no reference counting or anything on the task it self, you have to serialize
1763	* the cancelation and completion paths such that the aren't racing one another.
1764	*
1765	* @returns VBox status code
1766	* @param pTask The Task to cancel.
1767	*/
1768	VMMR3DECL(int) PDMR3AsyncCompletionTaskCancel(PPDMASYNCCOMPLETIONTASK pTask)
1769	{
1770	NOREF(pTask);
1771	return VERR_NOT_IMPLEMENTED;
1772	}
1773
1774
1775	/**
1776	* Changes the limit of a bandwidth manager for file endpoints to the given value.
1777	*
1778	* @returns VBox status code.
1779	* @param pUVM The user mode VM handle.
1780	* @param pszBwMgr The identifer of the bandwidth manager to change.
1781	* @param cbMaxNew The new maximum for the bandwidth manager in bytes/sec.
1782	*/
1783	VMMR3DECL(int) PDMR3AsyncCompletionBwMgrSetMaxForFile(PUVM pUVM, const char *pszBwMgr, uint32_t cbMaxNew)
1784	{
1785	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1786	PVM pVM = pUVM->pVM;
1787	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1788	AssertPtrReturn(pszBwMgr, VERR_INVALID_POINTER);
1789
1790	int rc = VINF_SUCCESS;
1791	PPDMASYNCCOMPLETIONEPCLASS pEpClass = pVM->pUVM->pdm.s.apAsyncCompletionEndpointClass[PDMASYNCCOMPLETIONEPCLASSTYPE_FILE];
1792	PPDMACBWMGR pBwMgr = pdmacBwMgrFindById(pEpClass, pszBwMgr);
1793	if (pBwMgr)
1794	{
1795	/*
1796	* Set the new value for the start and max value to let the manager pick up
1797	* the new limit immediately.
1798	*/
1799	ASMAtomicWriteU32(&pBwMgr->cbTransferPerSecMax, cbMaxNew);
1800	ASMAtomicWriteU32(&pBwMgr->cbTransferPerSecStart, cbMaxNew);
1801	}
1802	else
1803	rc = VERR_NOT_FOUND;
1804
1805	return rc;
1806	}
1807

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source: vbox/trunk/src/VBox/VMM/VMMR3/PDMAsyncCompletion.cpp@ 103583

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