VUSBUrb.cpp@ 97441

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1	/* $Id: VUSBUrb.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
2	/** @file
3	* Virtual USB - URBs.
4	*/
5
6	/*
7	* Copyright (C) 2006-2022 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_DRV_VUSB
33	#include <VBox/vmm/pdm.h>
34	#include <VBox/vmm/vmapi.h>
35	#include <VBox/err.h>
36	#include <iprt/alloc.h>
37	#include <VBox/log.h>
38	#include <iprt/time.h>
39	#include <iprt/thread.h>
40	#include <iprt/semaphore.h>
41	#include <iprt/string.h>
42	#include <iprt/assert.h>
43	#include <iprt/asm.h>
44	#include <iprt/env.h>
45	#include "VUSBInternal.h"
46
47
48
49	/*********************************************************************************************************************************
50	* Global Variables *
51	*********************************************************************************************************************************/
52	/** Strings for the CTLSTAGE enum values. */
53	const char * const g_apszCtlStates[4] =
54	{
55	"SETUP",
56	"DATA",
57	"STATUS",
58	"N/A"
59	};
60
61
62	/*********************************************************************************************************************************
63	* Internal Functions *
64	*********************************************************************************************************************************/
65
66
67	/**
68	* Complete a SETUP stage URB.
69	*
70	* This is used both for dev2host and host2dev kind of transfers.
71	* It is used by both the sync and async control paths.
72	*/
73	static void vusbMsgSetupCompletion(PVUSBURB pUrb)
74	{
75	PVUSBDEV pDev = pUrb->pVUsb->pDev;
76	PVUSBPIPE pPipe = &pDev->aPipes[pUrb->EndPt];
77	PVUSBCTRLEXTRA pExtra = pPipe->pCtrl;
78	PVUSBSETUP pSetup = pExtra->pMsg;
79
80	LogFlow(("%s: vusbMsgSetupCompletion: cbData=%d wLength=%#x cbLeft=%d pPipe=%p stage %s->DATA\n",
81	pUrb->pszDesc, pUrb->cbData, pSetup->wLength, pExtra->cbLeft, pPipe, g_apszCtlStates[pExtra->enmStage])); NOREF(pSetup);
82	pExtra->enmStage = CTLSTAGE_DATA;
83	pUrb->enmStatus = VUSBSTATUS_OK;
84	}
85
86	/**
87	* Complete a DATA stage URB.
88	*
89	* This is used both for dev2host and host2dev kind of transfers.
90	* It is used by both the sync and async control paths.
91	*/
92	static void vusbMsgDataCompletion(PVUSBURB pUrb)
93	{
94	PVUSBDEV pDev = pUrb->pVUsb->pDev;
95	PVUSBPIPE pPipe = &pDev->aPipes[pUrb->EndPt];
96	PVUSBCTRLEXTRA pExtra = pPipe->pCtrl;
97	PVUSBSETUP pSetup = pExtra->pMsg;
98
99	LogFlow(("%s: vusbMsgDataCompletion: cbData=%d wLength=%#x cbLeft=%d pPipe=%p stage DATA\n",
100	pUrb->pszDesc, pUrb->cbData, pSetup->wLength, pExtra->cbLeft, pPipe)); NOREF(pSetup);
101
102	pUrb->enmStatus = VUSBSTATUS_OK;
103	}
104
105	/**
106	* Complete a STATUS stage URB.
107	*
108	* This is used both for dev2host and host2dev kind of transfers.
109	* It is used by both the sync and async control paths.
110	*/
111	static void vusbMsgStatusCompletion(PVUSBURB pUrb)
112	{
113	PVUSBDEV pDev = pUrb->pVUsb->pDev;
114	PVUSBPIPE pPipe = &pDev->aPipes[pUrb->EndPt];
115	PVUSBCTRLEXTRA pExtra = pPipe->pCtrl;
116
117	if (pExtra->fOk)
118	{
119	/*
120	* vusbDevStdReqSetAddress requests are deferred.
121	*/
122	if (pDev->u8NewAddress != VUSB_INVALID_ADDRESS)
123	{
124	vusbDevSetAddress(pDev, pDev->u8NewAddress);
125	pDev->u8NewAddress = VUSB_INVALID_ADDRESS;
126	}
127
128	LogFlow(("%s: vusbMsgStatusCompletion: pDev=%p[%s] pPipe=%p err=OK stage %s->SETUP\n",
129	pUrb->pszDesc, pDev, pDev->pUsbIns->pszName, pPipe, g_apszCtlStates[pExtra->enmStage]));
130	pUrb->enmStatus = VUSBSTATUS_OK;
131	}
132	else
133	{
134	LogFlow(("%s: vusbMsgStatusCompletion: pDev=%p[%s] pPipe=%p err=STALL stage %s->SETUP\n",
135	pUrb->pszDesc, pDev, pDev->pUsbIns->pszName, pPipe, g_apszCtlStates[pExtra->enmStage]));
136	pUrb->enmStatus = VUSBSTATUS_STALL;
137	}
138
139	/*
140	* Done with this message sequence.
141	*/
142	pExtra->pbCur = NULL;
143	pExtra->enmStage = CTLSTAGE_SETUP;
144	}
145
146	/**
147	* This is a worker function for vusbMsgCompletion and
148	* vusbMsgSubmitSynchronously used to complete the original URB.
149	*
150	* @param pUrb The URB originating from the HCI.
151	*/
152	static void vusbCtrlCompletion(PVUSBURB pUrb)
153	{
154	PVUSBDEV pDev = pUrb->pVUsb->pDev;
155	PVUSBPIPE pPipe = &pDev->aPipes[pUrb->EndPt];
156	PVUSBCTRLEXTRA pExtra = pPipe->pCtrl;
157	LogFlow(("%s: vusbCtrlCompletion: pDev=%p[%s]\n", pUrb->pszDesc, pDev, pDev->pUsbIns->pszName));
158
159	switch (pExtra->enmStage)
160	{
161	case CTLSTAGE_SETUP:
162	vusbMsgSetupCompletion(pUrb);
163	break;
164	case CTLSTAGE_DATA:
165	vusbMsgDataCompletion(pUrb);
166	break;
167	case CTLSTAGE_STATUS:
168	vusbMsgStatusCompletion(pUrb);
169	break;
170	}
171	}
172
173	/**
174	* Called from vusbUrbCompletionRh when it encounters a
175	* message type URB.
176	*
177	* @param pUrb The URB within the control pipe extra state data.
178	*/
179	static void vusbMsgCompletion(PVUSBURB pUrb)
180	{
181	PVUSBDEV pDev = pUrb->pVUsb->pDev;
182	PVUSBPIPE pPipe = &pDev->aPipes[pUrb->EndPt];
183
184	RTCritSectEnter(&pPipe->CritSectCtrl);
185	PVUSBCTRLEXTRA pExtra = pPipe->pCtrl;
186
187	#ifdef LOG_ENABLED
188	LogFlow(("%s: vusbMsgCompletion: pDev=%p[%s]\n", pUrb->pszDesc, pDev, pDev->pUsbIns->pszName));
189	vusbUrbTrace(pUrb, "vusbMsgCompletion", true);
190	#endif
191	Assert(&pExtra->Urb == pUrb);
192
193
194	if (pUrb->enmStatus == VUSBSTATUS_OK)
195	pExtra->fOk = true;
196	else
197	pExtra->fOk = false;
198	pExtra->cbLeft = pUrb->cbData - sizeof(VUSBSETUP);
199
200	/*
201	* Complete the original URB.
202	*/
203	PVUSBURB pCtrlUrb = pUrb->pVUsb->pCtrlUrb;
204	pCtrlUrb->enmState = VUSBURBSTATE_REAPED;
205	vusbCtrlCompletion(pCtrlUrb);
206
207	/*
208	* 'Free' the message URB, i.e. put it back to the allocated state.
209	*/
210	Assert( pUrb->enmState == VUSBURBSTATE_REAPED
211	\|\| pUrb->enmState == VUSBURBSTATE_CANCELLED);
212	if (pUrb->enmState != VUSBURBSTATE_CANCELLED)
213	{
214	pUrb->enmState = VUSBURBSTATE_ALLOCATED;
215	pUrb->fCompleting = false;
216	}
217	RTCritSectLeave(&pPipe->CritSectCtrl);
218
219	/* Complete the original control URB on the root hub now. */
220	vusbUrbCompletionRh(pCtrlUrb);
221	}
222
223	/**
224	* Deal with URB errors, talking thru the RH to the HCI.
225	*
226	* @returns true if it could be retried.
227	* @returns false if it should be completed with failure.
228	* @param pRh The roothub the URB originated from.
229	* @param pUrb The URB in question.
230	*/
231	int vusbUrbErrorRhEx(PVUSBROOTHUB pRh, PVUSBURB pUrb)
232	{
233	PVUSBDEV pDev = pUrb->pVUsb->pDev;
234	LogFlow(("%s: vusbUrbErrorRh: pDev=%p[%s] rh=%p\n", pUrb->pszDesc, pDev, pDev->pUsbIns ? pDev->pUsbIns->pszName : "", pRh));
235	RT_NOREF(pDev);
236	return pRh->pIRhPort->pfnXferError(pRh->pIRhPort, pUrb);
237	}
238
239	/**
240	* Does URB completion on roothub level.
241	*
242	* @param pRh The roothub the URB originated from.
243	* @param pUrb The URB to complete.
244	*/
245	void vusbUrbCompletionRhEx(PVUSBROOTHUB pRh, PVUSBURB pUrb)
246	{
247	LogFlow(("%s: vusbUrbCompletionRh: type=%s status=%s\n",
248	pUrb->pszDesc, vusbUrbTypeName(pUrb->enmType), vusbUrbStatusName(pUrb->enmStatus)));
249	AssertMsg( pUrb->enmState == VUSBURBSTATE_REAPED
250	\|\| pUrb->enmState == VUSBURBSTATE_CANCELLED, ("%d\n", pUrb->enmState));
251
252	if ( pUrb->pVUsb->pDev
253	&& pUrb->pVUsb->pDev->hSniffer)
254	{
255	int rc = VUSBSnifferRecordEvent(pUrb->pVUsb->pDev->hSniffer, pUrb,
256	pUrb->enmStatus == VUSBSTATUS_OK
257	? VUSBSNIFFEREVENT_COMPLETE
258	: VUSBSNIFFEREVENT_ERROR_COMPLETE);
259	if (RT_FAILURE(rc))
260	LogRel(("VUSB: Capturing URB completion event failed with %Rrc\n", rc));
261	}
262
263	/* If there is a sniffer on the roothub record the completed URB there too. */
264	if (pRh->hSniffer != VUSBSNIFFER_NIL)
265	{
266	int rc = VUSBSnifferRecordEvent(pRh->hSniffer, pUrb,
267	pUrb->enmStatus == VUSBSTATUS_OK
268	? VUSBSNIFFEREVENT_COMPLETE
269	: VUSBSNIFFEREVENT_ERROR_COMPLETE);
270	if (RT_FAILURE(rc))
271	LogRel(("VUSB: Capturing URB completion event on the root hub failed with %Rrc\n", rc));
272	}
273
274	#ifdef VBOX_WITH_STATISTICS
275	/*
276	* Total and per-type submit statistics.
277	*/
278	if (pUrb->enmType != VUSBXFERTYPE_MSG)
279	{
280	Assert(pUrb->enmType >= 0 && pUrb->enmType < (int)RT_ELEMENTS(pRh->aTypes));
281
282	if ( pUrb->enmStatus == VUSBSTATUS_OK
283	\|\| pUrb->enmStatus == VUSBSTATUS_DATA_UNDERRUN
284	\|\| pUrb->enmStatus == VUSBSTATUS_DATA_OVERRUN)
285	{
286	if (pUrb->enmType == VUSBXFERTYPE_ISOC)
287	{
288	for (unsigned i = 0; i < pUrb->cIsocPkts; i++)
289	{
290	const unsigned cb = pUrb->aIsocPkts[i].cb;
291	if (cb)
292	{
293	STAM_COUNTER_ADD(&pRh->Total.StatActBytes, cb);
294	STAM_COUNTER_ADD(&pRh->aTypes[VUSBXFERTYPE_ISOC].StatActBytes, cb);
295	STAM_COUNTER_ADD(&pRh->aStatIsocDetails[i].Bytes, cb);
296	if (pUrb->enmDir == VUSBDIRECTION_IN)
297	{
298	STAM_COUNTER_ADD(&pRh->Total.StatActReadBytes, cb);
299	STAM_COUNTER_ADD(&pRh->aTypes[VUSBXFERTYPE_ISOC].StatActReadBytes, cb);
300	}
301	else
302	{
303	STAM_COUNTER_ADD(&pRh->Total.StatActWriteBytes, cb);
304	STAM_COUNTER_ADD(&pRh->aTypes[VUSBXFERTYPE_ISOC].StatActWriteBytes, cb);
305	}
306	STAM_COUNTER_INC(&pRh->StatIsocActPkts);
307	STAM_COUNTER_INC(&pRh->StatIsocActReadPkts);
308	}
309	STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].Pkts);
310	switch (pUrb->aIsocPkts[i].enmStatus)
311	{
312	case VUSBSTATUS_OK:
313	if (cb) STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].Ok);
314	else STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].Ok0);
315	break;
316	case VUSBSTATUS_DATA_UNDERRUN:
317	if (cb) STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].DataUnderrun);
318	else STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].DataUnderrun0);
319	break;
320	case VUSBSTATUS_DATA_OVERRUN: STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].DataOverrun); break;
321	case VUSBSTATUS_NOT_ACCESSED: STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].NotAccessed); break;
322	default: STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].Misc); break;
323	}
324	}
325	}
326	else
327	{
328	STAM_COUNTER_ADD(&pRh->Total.StatActBytes, pUrb->cbData);
329	STAM_COUNTER_ADD(&pRh->aTypes[pUrb->enmType].StatActBytes, pUrb->cbData);
330	if (pUrb->enmDir == VUSBDIRECTION_IN)
331	{
332	STAM_COUNTER_ADD(&pRh->Total.StatActReadBytes, pUrb->cbData);
333	STAM_COUNTER_ADD(&pRh->aTypes[pUrb->enmType].StatActReadBytes, pUrb->cbData);
334	}
335	else
336	{
337	STAM_COUNTER_ADD(&pRh->Total.StatActWriteBytes, pUrb->cbData);
338	STAM_COUNTER_ADD(&pRh->aTypes[pUrb->enmType].StatActWriteBytes, pUrb->cbData);
339	}
340	}
341	}
342	else
343	{
344	/* (Note. this also counts the cancelled packets) */
345	STAM_COUNTER_INC(&pRh->Total.StatUrbsFailed);
346	STAM_COUNTER_INC(&pRh->aTypes[pUrb->enmType].StatUrbsFailed);
347	}
348	}
349	#endif /* VBOX_WITH_STATISTICS */
350
351	/*
352	* Msg transfers are special virtual transfers associated with
353	* vusb, not the roothub
354	*/
355	switch (pUrb->enmType)
356	{
357	case VUSBXFERTYPE_MSG:
358	vusbMsgCompletion(pUrb);
359	return;
360	case VUSBXFERTYPE_ISOC:
361	/* Don't bother with error callback for isochronous URBs. */
362	break;
363
364	#if 1 /** @todo r=bird: OHCI say ''If the Transfer Descriptor is being
365	* retired because of an error, the Host Controller must update
366	* the Halt bit of the Endpoint Descriptor.''
367	*
368	* So, I'll subject all transfertypes to the same halt stuff now. It could
369	* just happen to fix the logitech disconnect trap in win2k.
370	*/
371	default:
372	#endif
373	case VUSBXFERTYPE_BULK:
374	if (pUrb->enmStatus != VUSBSTATUS_OK)
375	vusbUrbErrorRhEx(pRh, pUrb);
376	break;
377	}
378	#ifdef LOG_ENABLED
379	vusbUrbTrace(pUrb, "vusbUrbCompletionRh", true);
380	#endif
381
382	pRh->pIRhPort->pfnXferCompletion(pRh->pIRhPort, pUrb);
383	if (pUrb->enmState == VUSBURBSTATE_REAPED)
384	{
385	LogFlow(("%s: vusbUrbCompletionRh: Freeing URB\n", pUrb->pszDesc));
386	pUrb->pVUsb->pfnFree(pUrb);
387	}
388
389	vusbRhR3ProcessFrame(pRh, true /* fCallback */);
390	}
391
392
393	/**
394	* Certain control requests must not ever be forwarded to the device because
395	* they are required by the vusb core in order to maintain the vusb internal
396	* data structures.
397	*/
398	DECLINLINE(bool) vusbUrbIsRequestSafe(PCVUSBSETUP pSetup, PVUSBURB pUrb)
399	{
400	if ((pSetup->bmRequestType & VUSB_REQ_MASK) != VUSB_REQ_STANDARD)
401	return true;
402
403	switch (pSetup->bRequest)
404	{
405	case VUSB_REQ_CLEAR_FEATURE:
406	return pUrb->EndPt != 0 /* not default control pipe */
407	\|\| pSetup->wValue != 0 /* not ENDPOINT_HALT */
408	\|\| !pUrb->pVUsb->pDev->pUsbIns->pReg->pfnUsbClearHaltedEndpoint; /* not special need for backend */
409	case VUSB_REQ_SET_ADDRESS:
410	case VUSB_REQ_SET_CONFIGURATION:
411	case VUSB_REQ_GET_CONFIGURATION:
412	case VUSB_REQ_SET_INTERFACE:
413	case VUSB_REQ_GET_INTERFACE:
414	return false;
415
416	/*
417	* If the device wishes it, we'll use the cached device and
418	* configuration descriptors. (We return false when we want to use the
419	* cache. Yeah, it's a bit weird to read.)
420	*/
421	case VUSB_REQ_GET_DESCRIPTOR:
422	return !vusbDevIsDescriptorInCache(pUrb->pVUsb->pDev, pSetup);
423
424	default:
425	return true;
426	}
427	}
428
429
430	/**
431	* Queues an URB for asynchronous transfer.
432	* A list of asynchronous URBs is kept by the roothub.
433	*
434	* @returns VBox status code (from pfnUrbQueue).
435	* @param pUrb The URB.
436	*/
437	int vusbUrbQueueAsyncRh(PVUSBURB pUrb)
438	{
439	#ifdef LOG_ENABLED
440	vusbUrbTrace(pUrb, "vusbUrbQueueAsyncRh", false);
441	#endif
442
443	/* Immediately return in case of error.
444	* XXX There is still a race: The Rh might vanish after this point! */
445	PVUSBDEV pDev = pUrb->pVUsb->pDev;
446	PVUSBROOTHUB pRh = vusbDevGetRh(pDev);
447	if (!pRh)
448	{
449	Log(("vusbUrbQueueAsyncRh returning VERR_OBJECT_DESTROYED\n"));
450	return VERR_OBJECT_DESTROYED;
451	}
452
453	RTCritSectEnter(&pDev->CritSectAsyncUrbs);
454	int rc = pDev->pUsbIns->pReg->pfnUrbQueue(pDev->pUsbIns, pUrb);
455	if (RT_FAILURE(rc))
456	{
457	LogFlow(("%s: vusbUrbQueueAsyncRh: returns %Rrc (queue_urb)\n", pUrb->pszDesc, rc));
458	RTCritSectLeave(&pDev->CritSectAsyncUrbs);
459	return rc;
460	}
461
462	ASMAtomicIncU32(&pDev->aPipes[pUrb->EndPt].async);
463
464	/* Queue the Urb on the roothub */
465	RTListAppend(&pDev->LstAsyncUrbs, &pUrb->pVUsb->NdLst);
466	RTCritSectLeave(&pDev->CritSectAsyncUrbs);
467
468	return VINF_SUCCESS;
469	}
470
471
472	/**
473	* Send a control message synchronously.
474	* @return
475	*/
476	static void vusbMsgSubmitSynchronously(PVUSBURB pUrb, bool fSafeRequest)
477	{
478	PVUSBDEV pDev = pUrb->pVUsb->pDev;
479	Assert(pDev);
480	PVUSBPIPE pPipe = &pDev->aPipes[pUrb->EndPt];
481	PVUSBCTRLEXTRA pExtra = pPipe->pCtrl;
482	PVUSBSETUP pSetup = pExtra->pMsg;
483	LogFlow(("%s: vusbMsgSubmitSynchronously: pDev=%p[%s]\n", pUrb->pszDesc, pDev, pDev->pUsbIns ? pDev->pUsbIns->pszName : ""));
484
485	uint8_t pbData = (uint8_t )pExtra->pMsg + sizeof(*pSetup);
486	uint32_t cbData = pSetup->wLength;
487	bool fOk = false;
488	if (!fSafeRequest)
489	fOk = vusbDevStandardRequest(pDev, pUrb->EndPt, pSetup, pbData, &cbData);
490	else
491	AssertMsgFailed(("oops\n"));
492
493	pUrb->enmState = VUSBURBSTATE_REAPED;
494	if (fOk)
495	{
496	pSetup->wLength = cbData;
497	pUrb->enmStatus = VUSBSTATUS_OK;
498	pExtra->fOk = true;
499	}
500	else
501	{
502	pUrb->enmStatus = VUSBSTATUS_STALL;
503	pExtra->fOk = false;
504	}
505	pExtra->cbLeft = cbData; /* used by IN only */
506
507	vusbCtrlCompletion(pUrb);
508	vusbUrbCompletionRh(pUrb);
509
510	/*
511	* 'Free' the message URB, i.e. put it back to the allocated state.
512	*/
513	pExtra->Urb.enmState = VUSBURBSTATE_ALLOCATED;
514	pExtra->Urb.fCompleting = false;
515	}
516
517	/**
518	* Callback for dealing with device reset.
519	*/
520	void vusbMsgResetExtraData(PVUSBCTRLEXTRA pExtra)
521	{
522	if (!pExtra)
523	return;
524	pExtra->enmStage = CTLSTAGE_SETUP;
525	if (pExtra->Urb.enmState != VUSBURBSTATE_CANCELLED)
526	{
527	pExtra->Urb.enmState = VUSBURBSTATE_ALLOCATED;
528	pExtra->Urb.fCompleting = false;
529	}
530	}
531
532
533	/**
534	* Callback to free a cancelled message URB.
535	*
536	* This is yet another place we're we have to performance acrobatics to
537	* deal with cancelled URBs. sigh.
538	*
539	* The deal here is that we never free message URBs since they are integrated
540	* into the message pipe state. But since cancel can leave URBs unreaped and in
541	* a state which require them not to be freed, we'll have to do two things.
542	* First, if a new message URB is processed we'll have to get a new message
543	* pipe state. Second, we cannot just free the damn state structure because
544	* that might lead to heap corruption since it might still be in-flight.
545	*
546	* The URB embedded into the message pipe control structure will start in an
547	* ALLOCATED state. When submitted it will be go to the IN-FLIGHT state. When
548	* reaped it will go from REAPED to ALLOCATED. When completed in the CANCELLED
549	* state it will remain in that state (as does normal URBs).
550	*
551	* If a new message urb comes up while it's in the CANCELLED state, we will
552	* orphan it and it will be freed here in vusbMsgFreeUrb. We indicate this
553	* by setting pVUsb->pvFreeCtx to NULL.
554	*
555	* If we have to free the message state structure because of device destruction,
556	* configuration changes, or similar, we will orphan the message pipe state in
557	* the same way by setting pVUsb->pvFreeCtx to NULL and let this function free it.
558	*
559	* @param pUrb
560	*/
561	static DECLCALLBACK(void) vusbMsgFreeUrb(PVUSBURB pUrb)
562	{
563	vusbUrbAssert(pUrb);
564	PVUSBCTRLEXTRA pExtra = (PVUSBCTRLEXTRA)((uint8_t *)pUrb - RT_UOFFSETOF(VUSBCTRLEXTRA, Urb));
565	if ( pUrb->enmState == VUSBURBSTATE_CANCELLED
566	&& !pUrb->pVUsb->pvFreeCtx)
567	{
568	LogFlow(("vusbMsgFreeUrb: Freeing orphan: %p (pUrb=%p)\n", pExtra, pUrb));
569	RTMemFree(pExtra);
570	}
571	else
572	{
573	Assert(pUrb->pVUsb->pvFreeCtx == &pExtra->Urb);
574	pUrb->enmState = VUSBURBSTATE_ALLOCATED;
575	pUrb->fCompleting = false;
576	}
577	}
578
579	/**
580	* Frees the extra state data associated with a message pipe.
581	*
582	* @param pExtra The data.
583	*/
584	void vusbMsgFreeExtraData(PVUSBCTRLEXTRA pExtra)
585	{
586	if (!pExtra)
587	return;
588	if (pExtra->Urb.enmState != VUSBURBSTATE_CANCELLED)
589	{
590	pExtra->Urb.u32Magic = 0;
591	pExtra->Urb.enmState = VUSBURBSTATE_FREE;
592	if (pExtra->Urb.pszDesc)
593	RTStrFree(pExtra->Urb.pszDesc);
594	RTMemFree(pExtra);
595	}
596	else
597	pExtra->Urb.pVUsb->pvFreeCtx = NULL; /* see vusbMsgFreeUrb */
598	}
599
600	/**
601	* Allocates the extra state data required for a control pipe.
602	*
603	* @returns Pointer to the allocated and initialized state data.
604	* @returns NULL on out of memory condition.
605	* @param pUrb A URB we can copy default data from.
606	*/
607	static PVUSBCTRLEXTRA vusbMsgAllocExtraData(PVUSBURB pUrb)
608	{
609	/** @todo reuse these? */
610	PVUSBCTRLEXTRA pExtra;
611	/* The initial allocation tries to balance wasted memory versus the need to re-allocate
612	* the message data. Experience shows that an 8K initial allocation in practice never needs
613	* to be expanded but almost certainly wastes 4K or more memory.
614	*/
615	const size_t cbMax = _2K + sizeof(VUSBSETUP);
616	pExtra = (PVUSBCTRLEXTRA)RTMemAllocZ(RT_UOFFSETOF_DYN(VUSBCTRLEXTRA, Urb.abData[cbMax]));
617	if (pExtra)
618	{
619	pExtra->enmStage = CTLSTAGE_SETUP;
620	//pExtra->fOk = false;
621	pExtra->pMsg = (PVUSBSETUP)pExtra->Urb.abData;
622	pExtra->pbCur = (uint8_t *)(pExtra->pMsg + 1);
623	//pExtra->cbLeft = 0;
624	pExtra->cbMax = cbMax;
625
626	//pExtra->Urb.Dev.pvProxyUrb = NULL;
627	pExtra->Urb.u32Magic = VUSBURB_MAGIC;
628	pExtra->Urb.enmState = VUSBURBSTATE_ALLOCATED;
629	pExtra->Urb.fCompleting = false;
630	#ifdef LOG_ENABLED
631	RTStrAPrintf(&pExtra->Urb.pszDesc, "URB %p msg->%p", &pExtra->Urb, pUrb);
632	#endif
633	pExtra->Urb.pVUsb = &pExtra->VUsbExtra;
634	//pExtra->Urb.pVUsb->pCtrlUrb = NULL;
635	//pExtra->Urb.pVUsb->pNext = NULL;
636	//pExtra->Urb.pVUsb->ppPrev = NULL;
637	pExtra->Urb.pVUsb->pUrb = &pExtra->Urb;
638	pExtra->Urb.pVUsb->pDev = pUrb->pVUsb->pDev;
639	pExtra->Urb.pVUsb->pfnFree = vusbMsgFreeUrb;
640	pExtra->Urb.pVUsb->pvFreeCtx = &pExtra->Urb;
641	//pExtra->Urb.Hci = {0};
642	//pExtra->Urb.Dev.pvProxyUrb = NULL;
643	pExtra->Urb.DstAddress = pUrb->DstAddress;
644	pExtra->Urb.EndPt = pUrb->EndPt;
645	pExtra->Urb.enmType = VUSBXFERTYPE_MSG;
646	pExtra->Urb.enmDir = VUSBDIRECTION_INVALID;
647	//pExtra->Urb.fShortNotOk = false;
648	pExtra->Urb.enmStatus = VUSBSTATUS_INVALID;
649	//pExtra->Urb.cbData = 0;
650	vusbUrbAssert(&pExtra->Urb);
651	}
652	return pExtra;
653	}
654
655	/**
656	* Sets up the message.
657	*
658	* The message is associated with the pipe, in what's currently called
659	* control pipe extra state data (pointed to by pPipe->pCtrl). If this
660	* is a OUT message, we will no go on collecting data URB. If it's a
661	* IN message, we'll send it and then queue any incoming data for the
662	* URBs collecting it.
663	*
664	* @returns Success indicator.
665	*/
666	static bool vusbMsgSetup(PVUSBPIPE pPipe, const void *pvBuf, uint32_t cbBuf)
667	{
668	PVUSBCTRLEXTRA pExtra = pPipe->pCtrl;
669	const VUSBSETUP *pSetupIn = (PVUSBSETUP)pvBuf;
670
671	/*
672	* Validate length.
673	*/
674	if (cbBuf < sizeof(VUSBSETUP))
675	{
676	LogFlow(("vusbMsgSetup: pPipe=%p cbBuf=%u < %u (failure) !!!\n",
677	pPipe, cbBuf, sizeof(VUSBSETUP)));
678	return false;
679	}
680
681	/*
682	* Check if we've got an cancelled message URB. Allocate a new one in that case.
683	*/
684	if (pExtra->Urb.enmState == VUSBURBSTATE_CANCELLED)
685	{
686	void *pvNew = RTMemDup(pExtra, RT_UOFFSETOF_DYN(VUSBCTRLEXTRA, Urb.abData[pExtra->cbMax]));
687	if (!pvNew)
688	{
689	Log(("vusbMsgSetup: out of memory!!! cbReq=%zu\n", RT_UOFFSETOF_DYN(VUSBCTRLEXTRA, Urb.abData[pExtra->cbMax])));
690	return false;
691	}
692	pExtra->Urb.pVUsb->pvFreeCtx = NULL;
693	LogFlow(("vusbMsgSetup: Replacing canceled pExtra=%p with %p.\n", pExtra, pvNew));
694	pPipe->pCtrl = pExtra = (PVUSBCTRLEXTRA)pvNew;
695	pExtra->Urb.pVUsb = &pExtra->VUsbExtra;
696	pExtra->Urb.pVUsb->pUrb = &pExtra->Urb;
697	pExtra->pMsg = (PVUSBSETUP)pExtra->Urb.abData;
698	pExtra->Urb.enmState = VUSBURBSTATE_ALLOCATED;
699	pExtra->Urb.fCompleting = false;
700	}
701
702	/*
703	* Check that we've got sufficient space in the message URB.
704	*/
705	if (pExtra->cbMax < cbBuf + pSetupIn->wLength)
706	{
707	uint32_t cbReq = RT_ALIGN_32(cbBuf + pSetupIn->wLength, 64);
708	PVUSBCTRLEXTRA pNew = (PVUSBCTRLEXTRA)RTMemRealloc(pExtra, RT_UOFFSETOF_DYN(VUSBCTRLEXTRA, Urb.abData[cbReq]));
709	if (!pNew)
710	{
711	Log(("vusbMsgSetup: out of memory!!! cbReq=%u %zu\n",
712	cbReq, RT_UOFFSETOF_DYN(VUSBCTRLEXTRA, Urb.abData[cbReq])));
713	return false;
714	}
715	if (pExtra != pNew)
716	{
717	LogFunc(("Reallocated %u -> %u\n", pExtra->cbMax, cbReq));
718	pNew->pMsg = (PVUSBSETUP)pNew->Urb.abData;
719	pExtra = pNew;
720	pPipe->pCtrl = pExtra;
721	pExtra->Urb.pVUsb = &pExtra->VUsbExtra;
722	pExtra->Urb.pVUsb->pUrb = &pExtra->Urb;
723	pExtra->Urb.pVUsb->pvFreeCtx = &pExtra->Urb;
724	}
725
726	pExtra->cbMax = cbReq;
727	}
728	Assert(pExtra->Urb.enmState == VUSBURBSTATE_ALLOCATED);
729
730	/*
731	* Copy the setup data and prepare for data.
732	*/
733	PVUSBSETUP pSetup = pExtra->pMsg;
734	pExtra->fSubmitted = false;
735	pExtra->Urb.enmState = VUSBURBSTATE_IN_FLIGHT;
736	pExtra->pbCur = (uint8_t *)(pSetup + 1);
737	pSetup->bmRequestType = pSetupIn->bmRequestType;
738	pSetup->bRequest = pSetupIn->bRequest;
739	pSetup->wValue = RT_LE2H_U16(pSetupIn->wValue);
740	pSetup->wIndex = RT_LE2H_U16(pSetupIn->wIndex);
741	pSetup->wLength = RT_LE2H_U16(pSetupIn->wLength);
742
743	LogFlow(("vusbMsgSetup(%p,,%d): bmRequestType=%#04x bRequest=%#04x wValue=%#06x wIndex=%#06x wLength=0x%.4x\n",
744	pPipe, cbBuf, pSetup->bmRequestType, pSetup->bRequest, pSetup->wValue, pSetup->wIndex, pSetup->wLength));
745	return true;
746	}
747
748	/**
749	* Build the message URB from the given control URB and accompanying message
750	* pipe state which we grab from the device for the URB.
751	*
752	* @param pUrb The URB to submit.
753	* @param pSetup The setup packet for the message transfer.
754	* @param pExtra Pointer to the additional state requred for a control transfer.
755	* @param pPipe The message pipe state.
756	*/
757	static void vusbMsgDoTransfer(PVUSBURB pUrb, PVUSBSETUP pSetup, PVUSBCTRLEXTRA pExtra, PVUSBPIPE pPipe)
758	{
759	RT_NOREF(pPipe);
760
761	/*
762	* Mark this transfer as sent (cleared at setup time).
763	*/
764	Assert(!pExtra->fSubmitted);
765	pExtra->fSubmitted = true;
766
767	/*
768	* Do we have to do this synchronously?
769	*/
770	bool fSafeRequest = vusbUrbIsRequestSafe(pSetup, pUrb);
771	if (!fSafeRequest)
772	{
773	vusbMsgSubmitSynchronously(pUrb, fSafeRequest);
774	return;
775	}
776
777	/*
778	* Do it asynchronously.
779	*/
780	LogFlow(("%s: vusbMsgDoTransfer: ep=%d pMsgUrb=%p pPipe=%p stage=%s\n",
781	pUrb->pszDesc, pUrb->EndPt, &pExtra->Urb, pPipe, g_apszCtlStates[pExtra->enmStage]));
782	Assert(pExtra->Urb.enmType == VUSBXFERTYPE_MSG);
783	Assert(pExtra->Urb.EndPt == pUrb->EndPt);
784	pExtra->Urb.enmDir = (pSetup->bmRequestType & VUSB_DIR_TO_HOST) ? VUSBDIRECTION_IN : VUSBDIRECTION_OUT;
785	pExtra->Urb.cbData = pSetup->wLength + sizeof(*pSetup);
786	pExtra->Urb.pVUsb->pCtrlUrb = pUrb;
787	int rc = vusbUrbQueueAsyncRh(&pExtra->Urb);
788	if (RT_FAILURE(rc))
789	{
790	/*
791	* If we fail submitting it, will not retry but fail immediately.
792	*
793	* This keeps things simple. The host OS will have retried if
794	* it's a proxied device, and if it's a virtual one it really means
795	* it if it's failing a control message.
796	*/
797	LogFlow(("%s: vusbMsgDoTransfer: failed submitting urb! failing it with %s (rc=%Rrc)!!!\n",
798	pUrb->pszDesc, rc == VERR_VUSB_DEVICE_NOT_ATTACHED ? "DNR" : "CRC", rc));
799	pExtra->Urb.enmStatus = rc == VERR_VUSB_DEVICE_NOT_ATTACHED ? VUSBSTATUS_DNR : VUSBSTATUS_CRC;
800	pExtra->Urb.enmState = VUSBURBSTATE_REAPED;
801	vusbMsgCompletion(&pExtra->Urb);
802	}
803	}
804
805	/**
806	* Fails a URB request with a pipe STALL error.
807	*
808	* @returns VINF_SUCCESS indicating that we've completed the URB.
809	* @param pUrb The URB in question.
810	*/
811	static int vusbMsgStall(PVUSBURB pUrb)
812	{
813	PVUSBPIPE pPipe = &pUrb->pVUsb->pDev->aPipes[pUrb->EndPt];
814	PVUSBCTRLEXTRA pExtra = pPipe->pCtrl;
815	LogFlow(("%s: vusbMsgStall: pPipe=%p err=STALL stage %s->SETUP\n",
816	pUrb->pszDesc, pPipe, g_apszCtlStates[pExtra->enmStage]));
817
818	pExtra->pbCur = NULL;
819	pExtra->enmStage = CTLSTAGE_SETUP;
820	pUrb->enmState = VUSBURBSTATE_REAPED;
821	pUrb->enmStatus = VUSBSTATUS_STALL;
822	vusbUrbCompletionRh(pUrb);
823	return VINF_SUCCESS;
824	}
825
826	/**
827	* Submit a control message.
828	*
829	* Here we implement the USB defined traffic that occurs in message pipes
830	* (aka control endpoints). We want to provide a single function for device
831	* drivers so that they don't all have to reimplement the usb logic for
832	* themselves. This means we need to keep a little bit of state information
833	* because control transfers occur over multiple bus transactions. We may
834	* also need to buffer data over multiple data stages.
835	*
836	* @returns VBox status code.
837	* @param pUrb The URB to submit.
838	*/
839	static int vusbUrbSubmitCtrl(PVUSBURB pUrb)
840	{
841	#ifdef LOG_ENABLED
842	vusbUrbTrace(pUrb, "vusbUrbSubmitCtrl", false);
843	#endif
844	PVUSBDEV pDev = pUrb->pVUsb->pDev;
845	PVUSBPIPE pPipe = &pDev->aPipes[pUrb->EndPt];
846
847	RTCritSectEnter(&pPipe->CritSectCtrl);
848	PVUSBCTRLEXTRA pExtra = pPipe->pCtrl;
849
850	if (!pExtra && !(pExtra = pPipe->pCtrl = vusbMsgAllocExtraData(pUrb)))
851	{
852	RTCritSectLeave(&pPipe->CritSectCtrl);
853	return VERR_VUSB_NO_URB_MEMORY;
854	}
855	PVUSBSETUP pSetup = pExtra->pMsg;
856
857	if (pPipe->async)
858	{
859	AssertMsgFailed(("%u\n", pPipe->async));
860	RTCritSectLeave(&pPipe->CritSectCtrl);
861	return VERR_GENERAL_FAILURE;
862	}
863
864	/*
865	* A setup packet always resets the transaction and the
866	* end of data transmission is signified by change in
867	* data direction.
868	*/
869	if (pUrb->enmDir == VUSBDIRECTION_SETUP)
870	{
871	LogFlow(("%s: vusbUrbSubmitCtrl: pPipe=%p state %s->SETUP\n",
872	pUrb->pszDesc, pPipe, g_apszCtlStates[pExtra->enmStage]));
873	pExtra->enmStage = CTLSTAGE_SETUP;
874	}
875	else if ( pExtra->enmStage == CTLSTAGE_DATA
876	/* (the STATUS stage direction goes the other way) */
877	&& !!(pSetup->bmRequestType & VUSB_DIR_TO_HOST) != (pUrb->enmDir == VUSBDIRECTION_IN))
878	{
879	LogFlow(("%s: vusbUrbSubmitCtrl: pPipe=%p state %s->STATUS\n",
880	pUrb->pszDesc, pPipe, g_apszCtlStates[pExtra->enmStage]));
881	pExtra->enmStage = CTLSTAGE_STATUS;
882	}
883
884	/*
885	* Act according to the current message stage.
886	*/
887	switch (pExtra->enmStage)
888	{
889	case CTLSTAGE_SETUP:
890	/*
891	* When stall handshake is returned, all subsequent packets
892	* must generate stall until a setup packet arrives.
893	*/
894	if (pUrb->enmDir != VUSBDIRECTION_SETUP)
895	{
896	Log(("%s: vusbUrbSubmitCtrl: Stall at setup stage (dir=%#x)!!\n", pUrb->pszDesc, pUrb->enmDir));
897	vusbMsgStall(pUrb);
898	break;
899	}
900
901	/* Store setup details, return DNR if corrupt */
902	if (!vusbMsgSetup(pPipe, pUrb->abData, pUrb->cbData))
903	{
904	pUrb->enmState = VUSBURBSTATE_REAPED;
905	pUrb->enmStatus = VUSBSTATUS_DNR;
906	vusbUrbCompletionRh(pUrb);
907	break;
908	}
909	if (pPipe->pCtrl != pExtra)
910	{
911	pExtra = pPipe->pCtrl;
912	pSetup = pExtra->pMsg;
913	}
914
915	/* pre-buffer our output if it's device-to-host */
916	if (pSetup->bmRequestType & VUSB_DIR_TO_HOST)
917	vusbMsgDoTransfer(pUrb, pSetup, pExtra, pPipe);
918	else if (pSetup->wLength)
919	{
920	LogFlow(("%s: vusbUrbSubmitCtrl: stage=SETUP - to dev: need data\n", pUrb->pszDesc));
921	pUrb->enmState = VUSBURBSTATE_REAPED;
922	vusbMsgSetupCompletion(pUrb);
923	vusbUrbCompletionRh(pUrb);
924	}
925	/*
926	* If there is no DATA stage, we must send it now since there are
927	* no requirement of a STATUS stage.
928	*/
929	else
930	{
931	LogFlow(("%s: vusbUrbSubmitCtrl: stage=SETUP - to dev: sending\n", pUrb->pszDesc));
932	vusbMsgDoTransfer(pUrb, pSetup, pExtra, pPipe);
933	}
934	break;
935
936	case CTLSTAGE_DATA:
937	{
938	/*
939	* If a data stage exceeds the target buffer indicated in
940	* setup return stall, if data stage returns stall there
941	* will be no status stage.
942	*/
943	uint8_t pbData = (uint8_t )(pExtra->pMsg + 1);
944	if ((uintptr_t)&pExtra->pbCur[pUrb->cbData] > (uintptr_t)&pbData[pSetup->wLength])
945	{
946	/* In the device -> host direction, the device never returns more data than
947	what was requested (wLength). So, we can just cap cbData. */
948	ssize_t const cbLeft = &pbData[pSetup->wLength] - pExtra->pbCur;
949	if (pSetup->bmRequestType & VUSB_DIR_TO_HOST)
950	{
951	LogFlow(("%s: vusbUrbSubmitCtrl: Adjusting DATA request: %d -> %d\n", pUrb->pszDesc, pUrb->cbData, cbLeft));
952	pUrb->cbData = cbLeft >= 0 ? (uint32_t)cbLeft : 0;
953	}
954	/* In the host -> direction it's undefined what happens if the host provides
955	more data than what wLength inidicated. However, in 2007, iPhone detection
956	via iTunes would issue wLength=0 but provide a data URB which we needed to
957	pass on to the device anyway, so we'll just quietly adjust wLength if it's
958	zero and get on with the work.
959
960	What confuses me (bird) here, though, is that we've already sent the SETUP
961	URB to the device when we received it, and all we end up doing is an
962	unnecessary memcpy and completing the URB, but never actually sending the
963	data to the device. So, I guess this stuff is still a little iffy.
964
965	Note! We currently won't be doing any resizing, as we've disabled resizing
966	in general.
967	P.S. We used to have a very strange (pUrb->cbData % pSetup->wLength) == 0
968	thing too that joined the pUrb->cbData adjusting above. */
969	else if ( pSetup->wLength == 0
970	&& pUrb->cbData <= pExtra->cbMax)
971	{
972	Log(("%s: vusbUrbSubmitCtrl: pAdjusting wLength: %u -> %u (iPhone hack)\n",
973	pUrb->pszDesc, pSetup->wLength, pUrb->cbData));
974	pSetup->wLength = pUrb->cbData;
975	Assert(cbLeft >= (ssize_t)pUrb->cbData);
976	}
977	else
978	{
979	Log(("%s: vusbUrbSubmitCtrl: Stall at data stage!! wLength=%u cbData=%d cbMax=%d cbLeft=%dz\n",
980	pUrb->pszDesc, pSetup->wLength, pUrb->cbData, pExtra->cbMax, cbLeft));
981	vusbMsgStall(pUrb);
982	break;
983	}
984	}
985
986	if (pUrb->enmDir == VUSBDIRECTION_IN)
987	{
988	/* put data received from the device. */
989	const uint32_t cbRead = RT_MIN(pUrb->cbData, pExtra->cbLeft);
990	memcpy(pUrb->abData, pExtra->pbCur, cbRead);
991
992	/* advance */
993	pExtra->pbCur += cbRead;
994	if (pUrb->cbData == cbRead)
995	pExtra->cbLeft -= pUrb->cbData;
996	else
997	{
998	/* adjust the pUrb->cbData to reflect the number of bytes containing actual data. */
999	LogFlow(("%s: vusbUrbSubmitCtrl: adjusting last DATA pUrb->cbData, %d -> %d\n",
1000	pUrb->pszDesc, pUrb->cbData, pExtra->cbLeft));
1001	pUrb->cbData = cbRead;
1002	pExtra->cbLeft = 0;
1003	}
1004	}
1005	else
1006	{
1007	/* get data for sending when completed. */
1008	AssertStmt((ssize_t)pUrb->cbData <= pExtra->cbMax - (pExtra->pbCur - pbData), /* paranoia: checked above */
1009	pUrb->cbData = pExtra->cbMax - (uint32_t)RT_MIN(pExtra->pbCur - pbData, pExtra->cbMax));
1010	memcpy(pExtra->pbCur, pUrb->abData, pUrb->cbData);
1011
1012	/* advance */
1013	pExtra->pbCur += pUrb->cbData;
1014
1015	/*
1016	* If we've got the necessary data, we'll send it now since there are
1017	* no requirement of a STATUS stage.
1018	*/
1019	if ( !pExtra->fSubmitted
1020	&& pExtra->pbCur - pbData >= pSetup->wLength)
1021	{
1022	LogFlow(("%s: vusbUrbSubmitCtrl: stage=DATA - to dev: sending\n", pUrb->pszDesc));
1023	vusbMsgDoTransfer(pUrb, pSetup, pExtra, pPipe);
1024	break;
1025	}
1026	}
1027
1028	pUrb->enmState = VUSBURBSTATE_REAPED;
1029	vusbMsgDataCompletion(pUrb);
1030	vusbUrbCompletionRh(pUrb);
1031	break;
1032	}
1033
1034	case CTLSTAGE_STATUS:
1035	if ( (pSetup->bmRequestType & VUSB_DIR_TO_HOST)
1036	\|\| pExtra->fSubmitted)
1037	{
1038	Assert(pExtra->fSubmitted);
1039	pUrb->enmState = VUSBURBSTATE_REAPED;
1040	vusbMsgStatusCompletion(pUrb);
1041	vusbUrbCompletionRh(pUrb);
1042	}
1043	else
1044	{
1045	LogFlow(("%s: vusbUrbSubmitCtrl: stage=STATUS - to dev: sending\n", pUrb->pszDesc));
1046	vusbMsgDoTransfer(pUrb, pSetup, pExtra, pPipe);
1047	}
1048	break;
1049	}
1050
1051	RTCritSectLeave(&pPipe->CritSectCtrl);
1052	return VINF_SUCCESS;
1053	}
1054
1055
1056	/**
1057	* Submit a interrupt URB.
1058	*
1059	* @returns VBox status code.
1060	* @param pUrb The URB to submit.
1061	*/
1062	static int vusbUrbSubmitInterrupt(PVUSBURB pUrb)
1063	{
1064	LogFlow(("%s: vusbUrbSubmitInterrupt: (sync)\n", pUrb->pszDesc));
1065	return vusbUrbQueueAsyncRh(pUrb);
1066	}
1067
1068
1069	/**
1070	* Submit a bulk URB.
1071	*
1072	* @returns VBox status code.
1073	* @param pUrb The URB to submit.
1074	*/
1075	static int vusbUrbSubmitBulk(PVUSBURB pUrb)
1076	{
1077	LogFlow(("%s: vusbUrbSubmitBulk: (async)\n", pUrb->pszDesc));
1078	return vusbUrbQueueAsyncRh(pUrb);
1079	}
1080
1081
1082	/**
1083	* Submit an isochronous URB.
1084	*
1085	* @returns VBox status code.
1086	* @param pUrb The URB to submit.
1087	*/
1088	static int vusbUrbSubmitIsochronous(PVUSBURB pUrb)
1089	{
1090	LogFlow(("%s: vusbUrbSubmitIsochronous: (async)\n", pUrb->pszDesc));
1091	return vusbUrbQueueAsyncRh(pUrb);
1092	}
1093
1094
1095	/**
1096	* Fail a URB with a 'hard-error' sort of error.
1097	*
1098	* @return VINF_SUCCESS (the Urb status indicates the error).
1099	* @param pUrb The URB.
1100	*/
1101	int vusbUrbSubmitHardError(PVUSBURB pUrb)
1102	{
1103	/* FIXME: Find out the correct return code from the spec */
1104	pUrb->enmState = VUSBURBSTATE_REAPED;
1105	pUrb->enmStatus = VUSBSTATUS_DNR;
1106	vusbUrbCompletionRh(pUrb);
1107	return VINF_SUCCESS;
1108	}
1109
1110
1111	/**
1112	* Submit a URB.
1113	*/
1114	int vusbUrbSubmit(PVUSBURB pUrb)
1115	{
1116	vusbUrbAssert(pUrb);
1117	Assert(pUrb->enmState == VUSBURBSTATE_ALLOCATED);
1118	PVUSBDEV pDev = pUrb->pVUsb->pDev;
1119	PVUSBPIPE pPipe = NULL;
1120	Assert(pDev);
1121
1122	/*
1123	* Check that the device is in a valid state.
1124	*/
1125	const VUSBDEVICESTATE enmState = vusbDevGetState(pDev);
1126	if (enmState == VUSB_DEVICE_STATE_RESET)
1127	{
1128	LogRel(("VUSB: %s: power off ignored, the device is resetting!\n", pDev->pUsbIns->pszName));
1129	pUrb->enmStatus = VUSBSTATUS_DNR;
1130	/* This will postpone the TDs until we're done with the resetting. */
1131	return VERR_VUSB_DEVICE_IS_RESETTING;
1132	}
1133
1134	#ifdef LOG_ENABLED
1135	/* stamp it */
1136	pUrb->pVUsb->u64SubmitTS = RTTimeNanoTS();
1137	#endif
1138
1139	/** @todo Check max packet size here too? */
1140
1141	/*
1142	* Validate the pipe.
1143	*/
1144	if (pUrb->EndPt >= VUSB_PIPE_MAX)
1145	{
1146	Log(("%s: pDev=%p[%s]: SUBMIT: ep %i >= %i!!!\n", pUrb->pszDesc, pDev, pDev->pUsbIns->pszName, pUrb->EndPt, VUSB_PIPE_MAX));
1147	return vusbUrbSubmitHardError(pUrb);
1148	}
1149	PCVUSBDESCENDPOINTEX pEndPtDesc;
1150	switch (pUrb->enmDir)
1151	{
1152	case VUSBDIRECTION_IN:
1153	pEndPtDesc = pDev->aPipes[pUrb->EndPt].in;
1154	pPipe = &pDev->aPipes[pUrb->EndPt];
1155	break;
1156	case VUSBDIRECTION_SETUP:
1157	case VUSBDIRECTION_OUT:
1158	default:
1159	pEndPtDesc = pDev->aPipes[pUrb->EndPt].out;
1160	pPipe = &pDev->aPipes[pUrb->EndPt];
1161	break;
1162	}
1163	if (!pEndPtDesc)
1164	{
1165	Log(("%s: pDev=%p[%s]: SUBMIT: no endpoint!!! dir=%s e=%i\n",
1166	pUrb->pszDesc, pDev, pDev->pUsbIns->pszName, vusbUrbDirName(pUrb->enmDir), pUrb->EndPt));
1167	return vusbUrbSubmitHardError(pUrb);
1168	}
1169
1170	/*
1171	* Check for correct transfer types.
1172	* Our type codes are the same - what a coincidence.
1173	*/
1174	if ((pEndPtDesc->Core.bmAttributes & 0x3) != pUrb->enmType)
1175	{
1176	/* Bulk and interrupt transfers are identical on the bus level (the only difference
1177	* is in how they are scheduled by the HCD/HC) and need an exemption.
1178	* Atheros AR9271 is a known offender; its configuration descriptors include
1179	* interrupt endpoints, but drivers (Win7/8, Linux kernel pre-3.05) treat them
1180	* as bulk endpoints.
1181	*/
1182	if ( (pUrb->enmType == VUSBXFERTYPE_BULK && (pEndPtDesc->Core.bmAttributes & 0x3) == VUSBXFERTYPE_INTR)
1183	\|\| (pUrb->enmType == VUSBXFERTYPE_INTR && (pEndPtDesc->Core.bmAttributes & 0x3) == VUSBXFERTYPE_BULK))
1184	{
1185	Log2(("%s: pDev=%p[%s]: SUBMIT: mixing bulk/interrupt transfers on DstAddress=%i ep=%i dir=%s\n",
1186	pUrb->pszDesc, pDev, pDev->pUsbIns->pszName,
1187	pUrb->DstAddress, pUrb->EndPt, vusbUrbDirName(pUrb->enmDir)));
1188	}
1189	else
1190	{
1191	Log(("%s: pDev=%p[%s]: SUBMIT: %s transfer requested for %#x endpoint on DstAddress=%i ep=%i dir=%s\n",
1192	pUrb->pszDesc, pDev, pDev->pUsbIns->pszName, vusbUrbTypeName(pUrb->enmType), pEndPtDesc->Core.bmAttributes,
1193	pUrb->DstAddress, pUrb->EndPt, vusbUrbDirName(pUrb->enmDir)));
1194	return vusbUrbSubmitHardError(pUrb);
1195	}
1196	}
1197
1198	/*
1199	* If there's a URB in the read-ahead buffer, use it.
1200	*/
1201	int rc;
1202
1203	if (pDev->hSniffer)
1204	{
1205	rc = VUSBSnifferRecordEvent(pDev->hSniffer, pUrb, VUSBSNIFFEREVENT_SUBMIT);
1206	if (RT_FAILURE(rc))
1207	LogRel(("VUSB: Capturing URB submit event failed with %Rrc\n", rc));
1208	}
1209
1210	/*
1211	* Take action based on type.
1212	*/
1213	pUrb->enmState = VUSBURBSTATE_IN_FLIGHT;
1214	switch (pUrb->enmType)
1215	{
1216	case VUSBXFERTYPE_CTRL:
1217	rc = vusbUrbSubmitCtrl(pUrb);
1218	break;
1219	case VUSBXFERTYPE_BULK:
1220	rc = vusbUrbSubmitBulk(pUrb);
1221	break;
1222	case VUSBXFERTYPE_INTR:
1223	rc = vusbUrbSubmitInterrupt(pUrb);
1224	break;
1225	case VUSBXFERTYPE_ISOC:
1226	rc = vusbUrbSubmitIsochronous(pUrb);
1227	break;
1228	default:
1229	AssertMsgFailed(("Unexpected pUrb type %d\n", pUrb->enmType));
1230	return vusbUrbSubmitHardError(pUrb);
1231	}
1232
1233	/*
1234	* The device was detached, so we fail everything.
1235	* (We should really detach and destroy the device, but we'll have to wait till Main reacts.)
1236	*/
1237	if (rc == VERR_VUSB_DEVICE_NOT_ATTACHED)
1238	rc = vusbUrbSubmitHardError(pUrb);
1239	/*
1240	* We don't increment error count if async URBs are in flight, in
1241	* this case we just assume we need to throttle back, this also
1242	* makes sure we don't halt bulk endpoints at the wrong time.
1243	*/
1244	else if ( RT_FAILURE(rc)
1245	&& !ASMAtomicReadU32(&pDev->aPipes[pUrb->EndPt].async)
1246	/* && pUrb->enmType == VUSBXFERTYPE_BULK ?? */
1247	&& !vusbUrbErrorRh(pUrb))
1248	{
1249	/* don't retry it anymore. */
1250	pUrb->enmState = VUSBURBSTATE_REAPED;
1251	pUrb->enmStatus = VUSBSTATUS_CRC;
1252	vusbUrbCompletionRh(pUrb);
1253	return VINF_SUCCESS;
1254	}
1255
1256	return rc;
1257	}
1258
1259
1260	/**
1261	* Reap in-flight URBs.
1262	*
1263	* @param pUrbLst Pointer to the head of the URB list.
1264	* @param cMillies Number of milliseconds to block in each reap operation.
1265	* Use 0 to not block at all.
1266	*/
1267	void vusbUrbDoReapAsync(PRTLISTANCHOR pUrbLst, RTMSINTERVAL cMillies)
1268	{
1269	PVUSBURBVUSB pVUsbUrb = RTListGetFirst(pUrbLst, VUSBURBVUSBINT, NdLst);
1270	while (pVUsbUrb)
1271	{
1272	vusbUrbAssert(pVUsbUrb->pUrb);
1273	PVUSBURBVUSB pVUsbUrbNext = RTListGetNext(pUrbLst, pVUsbUrb, VUSBURBVUSBINT, NdLst);
1274	PVUSBDEV pDev = pVUsbUrb->pDev;
1275
1276	/* Don't touch resetting devices - paranoid safety precaution. */
1277	if (vusbDevGetState(pDev) != VUSB_DEVICE_STATE_RESET)
1278	{
1279	/*
1280	* Reap most URBs pending on a single device.
1281	*/
1282	PVUSBURB pRipe;
1283
1284	/**
1285	* This is workaround for race(should be fixed) detach on one EMT thread and frame boundary timer on other
1286	* and leaked URBs (shouldn't be affected by leaked URBs).
1287	*/
1288	Assert(pDev->pUsbIns);
1289	while ( pDev->pUsbIns
1290	&& ((pRipe = pDev->pUsbIns->pReg->pfnUrbReap(pDev->pUsbIns, cMillies)) != NULL))
1291	{
1292	vusbUrbAssert(pRipe);
1293	if (pVUsbUrbNext && pRipe == pVUsbUrbNext->pUrb)
1294	pVUsbUrbNext = RTListGetNext(pUrbLst, pVUsbUrbNext, VUSBURBVUSBINT, NdLst);
1295	vusbUrbRipe(pRipe);
1296	}
1297	}
1298
1299	/* next */
1300	pVUsbUrb = pVUsbUrbNext;
1301	}
1302	}
1303
1304	/**
1305	* Reap URBs on a per device level.
1306	*
1307	* @returns nothing.
1308	* @param pDev The device instance to reap URBs for.
1309	* @param cMillies Number of milliseconds to block in each reap operation.
1310	* Use 0 to not block at all.
1311	*/
1312	void vusbUrbDoReapAsyncDev(PVUSBDEV pDev, RTMSINTERVAL cMillies)
1313	{
1314	Assert(pDev->enmState != VUSB_DEVICE_STATE_RESET);
1315
1316	/*
1317	* Reap most URBs pending on a single device.
1318	*/
1319	PVUSBURB pRipe;
1320
1321	/**
1322	* This is workaround for race(should be fixed) detach on one EMT thread and frame boundary timer on other
1323	* and leaked URBs (shouldn't be affected by leaked URBs).
1324	*/
1325
1326	if (ASMAtomicXchgBool(&pDev->fWokenUp, false))
1327	return;
1328
1329	Assert(pDev->pUsbIns);
1330	while ( pDev->pUsbIns
1331	&& ((pRipe = pDev->pUsbIns->pReg->pfnUrbReap(pDev->pUsbIns, cMillies)) != NULL))
1332	{
1333	vusbUrbAssert(pRipe);
1334	vusbUrbRipe(pRipe);
1335	if (ASMAtomicXchgBool(&pDev->fWokenUp, false))
1336	break;
1337	}
1338	}
1339
1340	/**
1341	* Completes the URB.
1342	*/
1343	static void vusbUrbCompletion(PVUSBURB pUrb)
1344	{
1345	Assert(pUrb->pVUsb->pDev->aPipes);
1346	ASMAtomicDecU32(&pUrb->pVUsb->pDev->aPipes[pUrb->EndPt].async);
1347
1348	if (pUrb->enmState == VUSBURBSTATE_REAPED)
1349	vusbUrbUnlink(pUrb);
1350
1351	vusbUrbCompletionRh(pUrb);
1352	}
1353
1354	/**
1355	* The worker for vusbUrbCancel() which is executed on the I/O thread.
1356	*
1357	* @returns IPRT status code.
1358	* @param pUrb The URB to cancel.
1359	* @param enmMode The way the URB should be canceled.
1360	*/
1361	DECLHIDDEN(int) vusbUrbCancelWorker(PVUSBURB pUrb, CANCELMODE enmMode)
1362	{
1363	vusbUrbAssert(pUrb);
1364	#ifdef VBOX_WITH_STATISTICS
1365	PVUSBROOTHUB pRh = vusbDevGetRh(pUrb->pVUsb->pDev);
1366	#endif
1367	if (pUrb->enmState == VUSBURBSTATE_IN_FLIGHT)
1368	{
1369	LogFlow(("%s: vusbUrbCancel: Canceling in-flight\n", pUrb->pszDesc));
1370	STAM_COUNTER_INC(&pRh->Total.StatUrbsCancelled);
1371	if (pUrb->enmType != VUSBXFERTYPE_MSG)
1372	{
1373	STAM_STATS({Assert(pUrb->enmType >= 0 && pUrb->enmType < (int)RT_ELEMENTS(pRh->aTypes));});
1374	STAM_COUNTER_INC(&pRh->aTypes[pUrb->enmType].StatUrbsCancelled);
1375	}
1376
1377	pUrb->enmState = VUSBURBSTATE_CANCELLED;
1378	PPDMUSBINS pUsbIns = pUrb->pVUsb->pDev->pUsbIns;
1379	pUsbIns->pReg->pfnUrbCancel(pUsbIns, pUrb);
1380	Assert(pUrb->enmState == VUSBURBSTATE_CANCELLED \|\| pUrb->enmState == VUSBURBSTATE_REAPED);
1381
1382	pUrb->enmStatus = VUSBSTATUS_CRC;
1383	vusbUrbCompletion(pUrb);
1384	}
1385	else if (pUrb->enmState == VUSBURBSTATE_REAPED)
1386	{
1387	LogFlow(("%s: vusbUrbCancel: Canceling reaped urb\n", pUrb->pszDesc));
1388	STAM_COUNTER_INC(&pRh->Total.StatUrbsCancelled);
1389	if (pUrb->enmType != VUSBXFERTYPE_MSG)
1390	{
1391	STAM_STATS({Assert(pUrb->enmType >= 0 && pUrb->enmType < (int)RT_ELEMENTS(pRh->aTypes));});
1392	STAM_COUNTER_INC(&pRh->aTypes[pUrb->enmType].StatUrbsCancelled);
1393	}
1394
1395	pUrb->enmStatus = VUSBSTATUS_CRC;
1396	vusbUrbCompletion(pUrb);
1397	}
1398	else
1399	{
1400	AssertMsg(pUrb->enmState == VUSBURBSTATE_CANCELLED, ("Invalid state %d, pUrb=%p\n", pUrb->enmState, pUrb));
1401	switch (enmMode)
1402	{
1403	default:
1404	AssertMsgFailed(("Invalid cancel mode\n"));
1405	RT_FALL_THRU();
1406	case CANCELMODE_FAIL:
1407	pUrb->enmStatus = VUSBSTATUS_CRC;
1408	break;
1409	case CANCELMODE_UNDO:
1410	pUrb->enmStatus = VUSBSTATUS_UNDO;
1411	break;
1412
1413	}
1414	}
1415	return VINF_SUCCESS;
1416	}
1417
1418	/**
1419	* Cancels an URB with CRC failure.
1420	*
1421	* Cancelling an URB is a tricky thing. The USBProxy backend can not
1422	* all cancel it and we must keep the URB around until it's ripe and
1423	* can be reaped the normal way. However, we must complete the URB
1424	* now, before leaving this function. This is not nice. sigh.
1425	*
1426	* This function will cancel the URB if it's in-flight and complete
1427	* it. The device will in its pfnCancel method be given the chance to
1428	* say that the URB doesn't need reaping and should be unlinked.
1429	*
1430	* An URB which is in the cancel state after pfnCancel will remain in that
1431	* state and in the async list until its reaped. When it's finally reaped
1432	* it will be unlinked and freed without doing any completion.
1433	*
1434	* There are different modes of canceling an URB. When devices are being
1435	* disconnected etc., they will be completed with an error (CRC). However,
1436	* when the HC needs to temporarily halt communication with a device, the
1437	* URB/TD must be left alone if possible.
1438	*
1439	* @param pUrb The URB to cancel.
1440	* @param mode The way the URB should be canceled.
1441	*/
1442	void vusbUrbCancel(PVUSBURB pUrb, CANCELMODE mode)
1443	{
1444	int rc = vusbDevIoThreadExecSync(pUrb->pVUsb->pDev, (PFNRT)vusbUrbCancelWorker, 2, pUrb, mode);
1445	AssertRC(rc);
1446	}
1447
1448
1449	/**
1450	* Async version of vusbUrbCancel() - doesn't wait for the cancelling to be complete.
1451	*/
1452	void vusbUrbCancelAsync(PVUSBURB pUrb, CANCELMODE mode)
1453	{
1454	/* Don't try to cancel the URB when completion is in progress at the moment. */
1455	if (!ASMAtomicXchgBool(&pUrb->fCompleting, true))
1456	{
1457	int rc = vusbDevIoThreadExec(pUrb->pVUsb->pDev, 0 /* fFlags */, (PFNRT)vusbUrbCancelWorker, 2, pUrb, mode);
1458	AssertRC(rc);
1459	}
1460	}
1461
1462
1463	/**
1464	* Deals with a ripe URB (i.e. after reaping it).
1465	*
1466	* If an URB is in the reaped or in-flight state, we'll
1467	* complete it. If it's cancelled, we'll simply free it.
1468	* Any other states should never get here.
1469	*
1470	* @param pUrb The URB.
1471	*/
1472	void vusbUrbRipe(PVUSBURB pUrb)
1473	{
1474	if ( pUrb->enmState == VUSBURBSTATE_IN_FLIGHT
1475	\|\| pUrb->enmState == VUSBURBSTATE_REAPED)
1476	{
1477	pUrb->enmState = VUSBURBSTATE_REAPED;
1478	if (!ASMAtomicXchgBool(&pUrb->fCompleting, true))
1479	vusbUrbCompletion(pUrb);
1480	}
1481	else if (pUrb->enmState == VUSBURBSTATE_CANCELLED)
1482	{
1483	vusbUrbUnlink(pUrb);
1484	LogFlow(("%s: vusbUrbRipe: Freeing cancelled URB\n", pUrb->pszDesc));
1485	pUrb->pVUsb->pfnFree(pUrb);
1486	}
1487	else
1488	AssertMsgFailed(("Invalid URB state %d; %s\n", pUrb->enmState, pUrb->pszDesc));
1489	}
1490
1491
1492	/*
1493	* Local Variables:
1494	* mode: c
1495	* c-file-style: "bsd"
1496	* c-basic-offset: 4
1497	* tab-width: 4
1498	* indent-tabs-mode: s
1499	* End:
1500	*/
1501

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source: vbox/trunk/src/VBox/Devices/USB/VUSBUrb.cpp@ 97441

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