/* $Id: VUSBUrb.cpp 65169 2017-01-05 22:15:09Z vboxsync $ */ /** @file * Virtual USB - URBs. */ /* * Copyright (C) 2006-2016 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #define LOG_GROUP LOG_GROUP_DRV_VUSB #include #include #include #include #include #include #include #include #include #include #include #include #include "VUSBInternal.h" /********************************************************************************************************************************* * Global Variables * *********************************************************************************************************************************/ /** Strings for the CTLSTAGE enum values. */ const char * const g_apszCtlStates[4] = { "SETUP", "DATA", "STATUS", "N/A" }; /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ /** * Complete a SETUP stage URB. * * This is used both for dev2host and host2dev kind of transfers. * It is used by both the sync and async control paths. */ static void vusbMsgSetupCompletion(PVUSBURB pUrb) { PVUSBDEV pDev = pUrb->pVUsb->pDev; PVUSBPIPE pPipe = &pDev->aPipes[pUrb->EndPt]; PVUSBCTRLEXTRA pExtra = pPipe->pCtrl; PVUSBSETUP pSetup = pExtra->pMsg; LogFlow(("%s: vusbMsgSetupCompletion: cbData=%d wLength=%#x cbLeft=%d pPipe=%p stage %s->DATA\n", pUrb->pszDesc, pUrb->cbData, pSetup->wLength, pExtra->cbLeft, pPipe, g_apszCtlStates[pExtra->enmStage])); NOREF(pSetup); pExtra->enmStage = CTLSTAGE_DATA; pUrb->enmStatus = VUSBSTATUS_OK; } /** * Complete a DATA stage URB. * * This is used both for dev2host and host2dev kind of transfers. * It is used by both the sync and async control paths. */ static void vusbMsgDataCompletion(PVUSBURB pUrb) { PVUSBDEV pDev = pUrb->pVUsb->pDev; PVUSBPIPE pPipe = &pDev->aPipes[pUrb->EndPt]; PVUSBCTRLEXTRA pExtra = pPipe->pCtrl; PVUSBSETUP pSetup = pExtra->pMsg; LogFlow(("%s: vusbMsgDataCompletion: cbData=%d wLength=%#x cbLeft=%d pPipe=%p stage DATA\n", pUrb->pszDesc, pUrb->cbData, pSetup->wLength, pExtra->cbLeft, pPipe)); NOREF(pSetup); pUrb->enmStatus = VUSBSTATUS_OK; } /** * Complete a STATUS stage URB. * * This is used both for dev2host and host2dev kind of transfers. * It is used by both the sync and async control paths. */ static void vusbMsgStatusCompletion(PVUSBURB pUrb) { PVUSBDEV pDev = pUrb->pVUsb->pDev; PVUSBPIPE pPipe = &pDev->aPipes[pUrb->EndPt]; PVUSBCTRLEXTRA pExtra = pPipe->pCtrl; if (pExtra->fOk) { /* * vusbDevStdReqSetAddress requests are deferred. */ if (pDev->u8NewAddress != VUSB_INVALID_ADDRESS) { vusbDevSetAddress(pDev, pDev->u8NewAddress); pDev->u8NewAddress = VUSB_INVALID_ADDRESS; } LogFlow(("%s: vusbMsgStatusCompletion: pDev=%p[%s] pPipe=%p err=OK stage %s->SETUP\n", pUrb->pszDesc, pDev, pDev->pUsbIns->pszName, pPipe, g_apszCtlStates[pExtra->enmStage])); pUrb->enmStatus = VUSBSTATUS_OK; } else { LogFlow(("%s: vusbMsgStatusCompletion: pDev=%p[%s] pPipe=%p err=STALL stage %s->SETUP\n", pUrb->pszDesc, pDev, pDev->pUsbIns->pszName, pPipe, g_apszCtlStates[pExtra->enmStage])); pUrb->enmStatus = VUSBSTATUS_STALL; } /* * Done with this message sequence. */ pExtra->pbCur = NULL; pExtra->enmStage = CTLSTAGE_SETUP; } /** * This is a worker function for vusbMsgCompletion and * vusbMsgSubmitSynchronously used to complete the original URB. * * @param pUrb The URB originating from the HCI. */ static void vusbCtrlCompletion(PVUSBURB pUrb) { PVUSBDEV pDev = pUrb->pVUsb->pDev; PVUSBPIPE pPipe = &pDev->aPipes[pUrb->EndPt]; PVUSBCTRLEXTRA pExtra = pPipe->pCtrl; LogFlow(("%s: vusbCtrlCompletion: pDev=%p[%s]\n", pUrb->pszDesc, pDev, pDev->pUsbIns->pszName)); switch (pExtra->enmStage) { case CTLSTAGE_SETUP: vusbMsgSetupCompletion(pUrb); break; case CTLSTAGE_DATA: vusbMsgDataCompletion(pUrb); break; case CTLSTAGE_STATUS: vusbMsgStatusCompletion(pUrb); break; } } /** * Called from vusbUrbCompletionRh when it encounters a * message type URB. * * @param pUrb The URB within the control pipe extra state data. */ static void vusbMsgCompletion(PVUSBURB pUrb) { PVUSBDEV pDev = pUrb->pVUsb->pDev; PVUSBPIPE pPipe = &pDev->aPipes[pUrb->EndPt]; RTCritSectEnter(&pPipe->CritSectCtrl); PVUSBCTRLEXTRA pExtra = pPipe->pCtrl; #ifdef LOG_ENABLED LogFlow(("%s: vusbMsgCompletion: pDev=%p[%s]\n", pUrb->pszDesc, pDev, pDev->pUsbIns->pszName)); vusbUrbTrace(pUrb, "vusbMsgCompletion", true); #endif Assert(&pExtra->Urb == pUrb); if (pUrb->enmStatus == VUSBSTATUS_OK) pExtra->fOk = true; else pExtra->fOk = false; pExtra->cbLeft = pUrb->cbData - sizeof(VUSBSETUP); /* * Complete the original URB. */ PVUSBURB pCtrlUrb = pUrb->pVUsb->pCtrlUrb; pCtrlUrb->enmState = VUSBURBSTATE_REAPED; vusbCtrlCompletion(pCtrlUrb); /* * 'Free' the message URB, i.e. put it back to the allocated state. */ Assert( pUrb->enmState == VUSBURBSTATE_REAPED || pUrb->enmState == VUSBURBSTATE_CANCELLED); if (pUrb->enmState != VUSBURBSTATE_CANCELLED) { pUrb->enmState = VUSBURBSTATE_ALLOCATED; pUrb->fCompleting = false; } RTCritSectLeave(&pPipe->CritSectCtrl); /* Complete the original control URB on the root hub now. */ vusbUrbCompletionRh(pCtrlUrb); } /** * Deal with URB errors, talking thru the RH to the HCI. * * @returns true if it could be retried. * @returns false if it should be completed with failure. * @param pUrb The URB in question. */ int vusbUrbErrorRh(PVUSBURB pUrb) { PVUSBDEV pDev = pUrb->pVUsb->pDev; PVUSBROOTHUB pRh = vusbDevGetRh(pDev); AssertPtrReturn(pRh, VERR_VUSB_DEVICE_NOT_ATTACHED); LogFlow(("%s: vusbUrbErrorRh: pDev=%p[%s] rh=%p\n", pUrb->pszDesc, pDev, pDev->pUsbIns ? pDev->pUsbIns->pszName : "", pRh)); return pRh->pIRhPort->pfnXferError(pRh->pIRhPort, pUrb); } /** * Does URB completion on roothub level. * * @param pUrb The URB to complete. */ void vusbUrbCompletionRh(PVUSBURB pUrb) { LogFlow(("%s: vusbUrbCompletionRh: type=%s status=%s\n", pUrb->pszDesc, vusbUrbTypeName(pUrb->enmType), vusbUrbStatusName(pUrb->enmStatus))); AssertMsg( pUrb->enmState == VUSBURBSTATE_REAPED || pUrb->enmState == VUSBURBSTATE_CANCELLED, ("%d\n", pUrb->enmState)); if ( pUrb->pVUsb->pDev && pUrb->pVUsb->pDev->hSniffer) { int rc = VUSBSnifferRecordEvent(pUrb->pVUsb->pDev->hSniffer, pUrb, pUrb->enmStatus == VUSBSTATUS_OK ? VUSBSNIFFEREVENT_COMPLETE : VUSBSNIFFEREVENT_ERROR_COMPLETE); if (RT_FAILURE(rc)) LogRel(("VUSB: Capturing URB completion event failed with %Rrc\n", rc)); } PVUSBROOTHUB pRh = vusbDevGetRh(pUrb->pVUsb->pDev); AssertPtrReturnVoid(pRh); /* If there is a sniffer on the roothub record the completed URB there too. */ if (pRh->hSniffer != VUSBSNIFFER_NIL) { int rc = VUSBSnifferRecordEvent(pRh->hSniffer, pUrb, pUrb->enmStatus == VUSBSTATUS_OK ? VUSBSNIFFEREVENT_COMPLETE : VUSBSNIFFEREVENT_ERROR_COMPLETE); if (RT_FAILURE(rc)) LogRel(("VUSB: Capturing URB completion event on the root hub failed with %Rrc\n", rc)); } #ifdef VBOX_WITH_STATISTICS /* * Total and per-type submit statistics. */ if (pUrb->enmType != VUSBXFERTYPE_MSG) { Assert(pUrb->enmType >= 0 && pUrb->enmType < (int)RT_ELEMENTS(pRh->aTypes)); if ( pUrb->enmStatus == VUSBSTATUS_OK || pUrb->enmStatus == VUSBSTATUS_DATA_UNDERRUN || pUrb->enmStatus == VUSBSTATUS_DATA_OVERRUN) { if (pUrb->enmType == VUSBXFERTYPE_ISOC) { for (unsigned i = 0; i < pUrb->cIsocPkts; i++) { const unsigned cb = pUrb->aIsocPkts[i].cb; if (cb) { STAM_COUNTER_ADD(&pRh->Total.StatActBytes, cb); STAM_COUNTER_ADD(&pRh->aTypes[VUSBXFERTYPE_ISOC].StatActBytes, cb); STAM_COUNTER_ADD(&pRh->aStatIsocDetails[i].Bytes, cb); if (pUrb->enmDir == VUSBDIRECTION_IN) { STAM_COUNTER_ADD(&pRh->Total.StatActReadBytes, cb); STAM_COUNTER_ADD(&pRh->aTypes[VUSBXFERTYPE_ISOC].StatActReadBytes, cb); } else { STAM_COUNTER_ADD(&pRh->Total.StatActWriteBytes, cb); STAM_COUNTER_ADD(&pRh->aTypes[VUSBXFERTYPE_ISOC].StatActWriteBytes, cb); } STAM_COUNTER_INC(&pRh->StatIsocActPkts); STAM_COUNTER_INC(&pRh->StatIsocActReadPkts); } STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].Pkts); switch (pUrb->aIsocPkts[i].enmStatus) { case VUSBSTATUS_OK: if (cb) STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].Ok); else STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].Ok0); break; case VUSBSTATUS_DATA_UNDERRUN: if (cb) STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].DataUnderrun); else STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].DataUnderrun0); break; case VUSBSTATUS_DATA_OVERRUN: STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].DataOverrun); break; case VUSBSTATUS_NOT_ACCESSED: STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].NotAccessed); break; default: STAM_COUNTER_INC(&pRh->aStatIsocDetails[i].Misc); break; } } } else { STAM_COUNTER_ADD(&pRh->Total.StatActBytes, pUrb->cbData); STAM_COUNTER_ADD(&pRh->aTypes[pUrb->enmType].StatActBytes, pUrb->cbData); if (pUrb->enmDir == VUSBDIRECTION_IN) { STAM_COUNTER_ADD(&pRh->Total.StatActReadBytes, pUrb->cbData); STAM_COUNTER_ADD(&pRh->aTypes[pUrb->enmType].StatActReadBytes, pUrb->cbData); } else { STAM_COUNTER_ADD(&pRh->Total.StatActWriteBytes, pUrb->cbData); STAM_COUNTER_ADD(&pRh->aTypes[pUrb->enmType].StatActWriteBytes, pUrb->cbData); } } } else { /* (Note. this also counts the cancelled packets) */ STAM_COUNTER_INC(&pRh->Total.StatUrbsFailed); STAM_COUNTER_INC(&pRh->aTypes[pUrb->enmType].StatUrbsFailed); } } #endif /* VBOX_WITH_STATISTICS */ /* * Msg transfers are special virtual transfers associated with * vusb, not the roothub */ switch (pUrb->enmType) { case VUSBXFERTYPE_MSG: vusbMsgCompletion(pUrb); return; case VUSBXFERTYPE_ISOC: /* Don't bother with error callback for isochronous URBs. */ break; #if 1 /** @todo r=bird: OHCI say ''If the Transfer Descriptor is being * retired because of an error, the Host Controller must update * the Halt bit of the Endpoint Descriptor.'' * * So, I'll subject all transfertypes to the same halt stuff now. It could * just happen to fix the logitech disconnect trap in win2k. */ default: #endif case VUSBXFERTYPE_BULK: if (pUrb->enmStatus != VUSBSTATUS_OK) vusbUrbErrorRh(pUrb); break; } #ifdef LOG_ENABLED vusbUrbTrace(pUrb, "vusbUrbCompletionRh", true); #endif pRh->pIRhPort->pfnXferCompletion(pRh->pIRhPort, pUrb); if (pUrb->enmState == VUSBURBSTATE_REAPED) { LogFlow(("%s: vusbUrbCompletionRh: Freeing URB\n", pUrb->pszDesc)); pUrb->pVUsb->pfnFree(pUrb); } vusbRhR3ProcessFrame(pRh, true /* fCallback */); } /** * Certain control requests must not ever be forwarded to the device because * they are required by the vusb core in order to maintain the vusb internal * data structures. */ DECLINLINE(bool) vusbUrbIsRequestSafe(PCVUSBSETUP pSetup, PVUSBURB pUrb) { if ((pSetup->bmRequestType & VUSB_REQ_MASK) != VUSB_REQ_STANDARD) return true; switch (pSetup->bRequest) { case VUSB_REQ_CLEAR_FEATURE: return pUrb->EndPt != 0 /* not default control pipe */ || pSetup->wValue != 0 /* not ENDPOINT_HALT */ || !pUrb->pVUsb->pDev->pUsbIns->pReg->pfnUsbClearHaltedEndpoint; /* not special need for backend */ case VUSB_REQ_SET_ADDRESS: case VUSB_REQ_SET_CONFIGURATION: case VUSB_REQ_GET_CONFIGURATION: case VUSB_REQ_SET_INTERFACE: case VUSB_REQ_GET_INTERFACE: return false; /* * If the device wishes it, we'll use the cached device and * configuration descriptors. (We return false when we want to use the * cache. Yeah, it's a bit weird to read.) */ case VUSB_REQ_GET_DESCRIPTOR: if ( !pUrb->pVUsb->pDev->pDescCache->fUseCachedDescriptors || (pSetup->bmRequestType & VUSB_RECIP_MASK) != VUSB_TO_DEVICE) return true; switch (pSetup->wValue >> 8) { case VUSB_DT_DEVICE: case VUSB_DT_CONFIG: return false; case VUSB_DT_STRING: return !pUrb->pVUsb->pDev->pDescCache->fUseCachedStringsDescriptors; default: return true; } default: return true; } } /** * Queues an URB for asynchronous transfer. * A list of asynchronous URBs is kept by the roothub. * * @returns VBox status code (from pfnUrbQueue). * @param pUrb The URB. */ int vusbUrbQueueAsyncRh(PVUSBURB pUrb) { #ifdef LOG_ENABLED vusbUrbTrace(pUrb, "vusbUrbQueueAsyncRh", false); #endif /* Immediately return in case of error. * XXX There is still a race: The Rh might vanish after this point! */ PVUSBDEV pDev = pUrb->pVUsb->pDev; PVUSBROOTHUB pRh = vusbDevGetRh(pDev); if (!pRh) { Log(("vusbUrbQueueAsyncRh returning VERR_OBJECT_DESTROYED\n")); return VERR_OBJECT_DESTROYED; } RTCritSectEnter(&pDev->CritSectAsyncUrbs); int rc = pDev->pUsbIns->pReg->pfnUrbQueue(pDev->pUsbIns, pUrb); if (RT_FAILURE(rc)) { LogFlow(("%s: vusbUrbQueueAsyncRh: returns %Rrc (queue_urb)\n", pUrb->pszDesc, rc)); RTCritSectLeave(&pDev->CritSectAsyncUrbs); return rc; } ASMAtomicIncU32(&pDev->aPipes[pUrb->EndPt].async); /* Queue the Urb on the roothub */ RTListAppend(&pDev->LstAsyncUrbs, &pUrb->pVUsb->NdLst); RTCritSectLeave(&pDev->CritSectAsyncUrbs); return VINF_SUCCESS; } /** * Send a control message *synchronously*. * @return */ static void vusbMsgSubmitSynchronously(PVUSBURB pUrb, bool fSafeRequest) { PVUSBDEV pDev = pUrb->pVUsb->pDev; Assert(pDev); PVUSBPIPE pPipe = &pDev->aPipes[pUrb->EndPt]; PVUSBCTRLEXTRA pExtra = pPipe->pCtrl; PVUSBSETUP pSetup = pExtra->pMsg; LogFlow(("%s: vusbMsgSubmitSynchronously: pDev=%p[%s]\n", pUrb->pszDesc, pDev, pDev->pUsbIns ? pDev->pUsbIns->pszName : "")); uint8_t *pbData = (uint8_t *)pExtra->pMsg + sizeof(*pSetup); uint32_t cbData = pSetup->wLength; bool fOk = false; if (!fSafeRequest) fOk = vusbDevStandardRequest(pDev, pUrb->EndPt, pSetup, pbData, &cbData); else AssertMsgFailed(("oops\n")); pUrb->enmState = VUSBURBSTATE_REAPED; if (fOk) { pSetup->wLength = cbData; pUrb->enmStatus = VUSBSTATUS_OK; pExtra->fOk = true; } else { pUrb->enmStatus = VUSBSTATUS_STALL; pExtra->fOk = false; } pExtra->cbLeft = cbData; /* used by IN only */ vusbCtrlCompletion(pUrb); vusbUrbCompletionRh(pUrb); /* * 'Free' the message URB, i.e. put it back to the allocated state. */ pExtra->Urb.enmState = VUSBURBSTATE_ALLOCATED; pExtra->Urb.fCompleting = false; } /** * Callback for dealing with device reset. */ void vusbMsgResetExtraData(PVUSBCTRLEXTRA pExtra) { if (!pExtra) return; pExtra->enmStage = CTLSTAGE_SETUP; if (pExtra->Urb.enmState != VUSBURBSTATE_CANCELLED) { pExtra->Urb.enmState = VUSBURBSTATE_ALLOCATED; pExtra->Urb.fCompleting = false; } } /** * Callback to free a cancelled message URB. * * This is yet another place we're we have to performance acrobatics to * deal with cancelled URBs. sigh. * * The deal here is that we never free message URBs since they are integrated * into the message pipe state. But since cancel can leave URBs unreaped and in * a state which require them not to be freed, we'll have to do two things. * First, if a new message URB is processed we'll have to get a new message * pipe state. Second, we cannot just free the damn state structure because * that might lead to heap corruption since it might still be in-flight. * * The URB embedded into the message pipe control structure will start in an * ALLOCATED state. When submitted it will be go to the IN-FLIGHT state. When * reaped it will go from REAPED to ALLOCATED. When completed in the CANCELLED * state it will remain in that state (as does normal URBs). * * If a new message urb comes up while it's in the CANCELLED state, we will * orphan it and it will be freed here in vusbMsgFreeUrb. We indicate this * by setting pVUsb->pvFreeCtx to NULL. * * If we have to free the message state structure because of device destruction, * configuration changes, or similar, we will orphan the message pipe state in * the same way by setting pVUsb->pvFreeCtx to NULL and let this function free it. * * @param pUrb */ static DECLCALLBACK(void) vusbMsgFreeUrb(PVUSBURB pUrb) { vusbUrbAssert(pUrb); PVUSBCTRLEXTRA pExtra = (PVUSBCTRLEXTRA)((uint8_t *)pUrb - RT_OFFSETOF(VUSBCTRLEXTRA, Urb)); if ( pUrb->enmState == VUSBURBSTATE_CANCELLED && !pUrb->pVUsb->pvFreeCtx) { LogFlow(("vusbMsgFreeUrb: Freeing orphan: %p (pUrb=%p)\n", pExtra, pUrb)); RTMemFree(pExtra); } else { Assert(pUrb->pVUsb->pvFreeCtx == &pExtra->Urb); pUrb->enmState = VUSBURBSTATE_ALLOCATED; pUrb->fCompleting = false; } } /** * Frees the extra state data associated with a message pipe. * * @param pExtra The data. */ void vusbMsgFreeExtraData(PVUSBCTRLEXTRA pExtra) { if (!pExtra) return; if (pExtra->Urb.enmState != VUSBURBSTATE_CANCELLED) { pExtra->Urb.u32Magic = 0; pExtra->Urb.enmState = VUSBURBSTATE_FREE; if (pExtra->Urb.pszDesc) RTStrFree(pExtra->Urb.pszDesc); RTMemFree(pExtra); } else pExtra->Urb.pVUsb->pvFreeCtx = NULL; /* see vusbMsgFreeUrb */ } /** * Allocates the extra state data required for a control pipe. * * @returns Pointer to the allocated and initialized state data. * @returns NULL on out of memory condition. * @param pUrb A URB we can copy default data from. */ static PVUSBCTRLEXTRA vusbMsgAllocExtraData(PVUSBURB pUrb) { /** @todo reuse these? */ PVUSBCTRLEXTRA pExtra; const size_t cbMax = sizeof(VUSBURBVUSBINT) + sizeof(pExtra->Urb.abData) + sizeof(VUSBSETUP); pExtra = (PVUSBCTRLEXTRA)RTMemAllocZ(RT_OFFSETOF(VUSBCTRLEXTRA, Urb.abData[cbMax])); if (pExtra) { pExtra->enmStage = CTLSTAGE_SETUP; //pExtra->fOk = false; pExtra->pMsg = (PVUSBSETUP)pExtra->Urb.abData; pExtra->pbCur = (uint8_t *)(pExtra->pMsg + 1); //pExtra->cbLeft = 0; pExtra->cbMax = cbMax; //pExtra->Urb.Dev.pvProxyUrb = NULL; pExtra->Urb.u32Magic = VUSBURB_MAGIC; pExtra->Urb.enmState = VUSBURBSTATE_ALLOCATED; pExtra->Urb.fCompleting = false; #ifdef LOG_ENABLED RTStrAPrintf(&pExtra->Urb.pszDesc, "URB %p msg->%p", &pExtra->Urb, pUrb); #endif pExtra->Urb.pVUsb = (PVUSBURBVUSB)&pExtra->Urb.abData[sizeof(pExtra->Urb.abData) + sizeof(VUSBSETUP)]; //pExtra->Urb.pVUsb->pCtrlUrb = NULL; //pExtra->Urb.pVUsb->pNext = NULL; //pExtra->Urb.pVUsb->ppPrev = NULL; pExtra->Urb.pVUsb->pUrb = &pExtra->Urb; pExtra->Urb.pVUsb->pDev = pUrb->pVUsb->pDev; pExtra->Urb.pVUsb->pfnFree = vusbMsgFreeUrb; pExtra->Urb.pVUsb->pvFreeCtx = &pExtra->Urb; //pExtra->Urb.Hci = {0}; //pExtra->Urb.Dev.pvProxyUrb = NULL; pExtra->Urb.DstAddress = pUrb->DstAddress; pExtra->Urb.EndPt = pUrb->EndPt; pExtra->Urb.enmType = VUSBXFERTYPE_MSG; pExtra->Urb.enmDir = VUSBDIRECTION_INVALID; //pExtra->Urb.fShortNotOk = false; pExtra->Urb.enmStatus = VUSBSTATUS_INVALID; //pExtra->Urb.cbData = 0; vusbUrbAssert(&pExtra->Urb); } return pExtra; } /** * Sets up the message. * * The message is associated with the pipe, in what's currently called * control pipe extra state data (pointed to by pPipe->pCtrl). If this * is a OUT message, we will no go on collecting data URB. If it's a * IN message, we'll send it and then queue any incoming data for the * URBs collecting it. * * @returns Success indicator. */ static bool vusbMsgSetup(PVUSBPIPE pPipe, const void *pvBuf, uint32_t cbBuf) { PVUSBCTRLEXTRA pExtra = pPipe->pCtrl; const VUSBSETUP *pSetupIn = (PVUSBSETUP)pvBuf; /* * Validate length. */ if (cbBuf < sizeof(VUSBSETUP)) { LogFlow(("vusbMsgSetup: pPipe=%p cbBuf=%u < %u (failure) !!!\n", pPipe, cbBuf, sizeof(VUSBSETUP))); return false; } /* * Check if we've got an cancelled message URB. Allocate a new one in that case. */ if (pExtra->Urb.enmState == VUSBURBSTATE_CANCELLED) { void *pvNew = RTMemDup(pExtra, RT_OFFSETOF(VUSBCTRLEXTRA, Urb.abData[pExtra->cbMax])); if (!pvNew) { Log(("vusbMsgSetup: out of memory!!! cbReq=%u\n", RT_OFFSETOF(VUSBCTRLEXTRA, Urb.abData[pExtra->cbMax]))); return false; } pExtra->Urb.pVUsb->pvFreeCtx = NULL; LogFlow(("vusbMsgSetup: Replacing canceled pExtra=%p with %p.\n", pExtra, pvNew)); pPipe->pCtrl = pExtra = (PVUSBCTRLEXTRA)pvNew; pExtra->Urb.pVUsb = (PVUSBURBVUSB)&pExtra->Urb.abData[sizeof(pExtra->Urb.abData) + sizeof(VUSBSETUP)]; pExtra->Urb.pVUsb->pUrb = &pExtra->Urb; pExtra->pMsg = (PVUSBSETUP)pExtra->Urb.abData; pExtra->Urb.enmState = VUSBURBSTATE_ALLOCATED; pExtra->Urb.fCompleting = false; } /* * Check that we've got sufficient space in the message URB. */ if (pExtra->cbMax < cbBuf + pSetupIn->wLength + sizeof(VUSBURBVUSBINT)) { uint32_t cbReq = RT_ALIGN_32(cbBuf + pSetupIn->wLength + sizeof(VUSBURBVUSBINT), 1024); PVUSBCTRLEXTRA pNew = (PVUSBCTRLEXTRA)RTMemRealloc(pExtra, RT_OFFSETOF(VUSBCTRLEXTRA, Urb.abData[cbReq])); if (!pNew) { Log(("vusbMsgSetup: out of memory!!! cbReq=%u %u\n", cbReq, RT_OFFSETOF(VUSBCTRLEXTRA, Urb.abData[cbReq]))); return false; } if (pExtra != pNew) { pNew->pMsg = (PVUSBSETUP)pNew->Urb.abData; pExtra = pNew; } pExtra->Urb.pVUsb = (PVUSBURBVUSB)&pExtra->Urb.abData[cbBuf + pSetupIn->wLength]; pExtra->Urb.pVUsb->pUrb = &pExtra->Urb; pExtra->cbMax = cbReq; } Assert(pExtra->Urb.enmState == VUSBURBSTATE_ALLOCATED); /* * Copy the setup data and prepare for data. */ PVUSBSETUP pSetup = pExtra->pMsg; pExtra->fSubmitted = false; pExtra->Urb.enmState = VUSBURBSTATE_IN_FLIGHT; pExtra->pbCur = (uint8_t *)(pSetup + 1); pSetup->bmRequestType = pSetupIn->bmRequestType; pSetup->bRequest = pSetupIn->bRequest; pSetup->wValue = RT_LE2H_U16(pSetupIn->wValue); pSetup->wIndex = RT_LE2H_U16(pSetupIn->wIndex); pSetup->wLength = RT_LE2H_U16(pSetupIn->wLength); LogFlow(("vusbMsgSetup(%p,,%d): bmRequestType=%#04x bRequest=%#04x wValue=%#06x wIndex=%#06x wLength=0x%.4x\n", pPipe, cbBuf, pSetup->bmRequestType, pSetup->bRequest, pSetup->wValue, pSetup->wIndex, pSetup->wLength)); return true; } /** * Build the message URB from the given control URB and accompanying message * pipe state which we grab from the device for the URB. * * @param pUrb The URB to submit. * @param pSetup The setup packet for the message transfer. * @param pExtra Pointer to the additional state requred for a control transfer. * @param pPipe The message pipe state. */ static void vusbMsgDoTransfer(PVUSBURB pUrb, PVUSBSETUP pSetup, PVUSBCTRLEXTRA pExtra, PVUSBPIPE pPipe) { RT_NOREF(pPipe); /* * Mark this transfer as sent (cleared at setup time). */ Assert(!pExtra->fSubmitted); pExtra->fSubmitted = true; /* * Do we have to do this synchronously? */ bool fSafeRequest = vusbUrbIsRequestSafe(pSetup, pUrb); if (!fSafeRequest) { vusbMsgSubmitSynchronously(pUrb, fSafeRequest); return; } /* * Do it asynchronously. */ LogFlow(("%s: vusbMsgDoTransfer: ep=%d pMsgUrb=%p pPipe=%p stage=%s\n", pUrb->pszDesc, pUrb->EndPt, &pExtra->Urb, pPipe, g_apszCtlStates[pExtra->enmStage])); Assert(pExtra->Urb.enmType == VUSBXFERTYPE_MSG); Assert(pExtra->Urb.EndPt == pUrb->EndPt); pExtra->Urb.enmDir = (pSetup->bmRequestType & VUSB_DIR_TO_HOST) ? VUSBDIRECTION_IN : VUSBDIRECTION_OUT; pExtra->Urb.cbData = pSetup->wLength + sizeof(*pSetup); pExtra->Urb.pVUsb->pCtrlUrb = pUrb; int rc = vusbUrbQueueAsyncRh(&pExtra->Urb); if (RT_FAILURE(rc)) { /* * If we fail submitting it, will not retry but fail immediately. * * This keeps things simple. The host OS will have retried if * it's a proxied device, and if it's a virtual one it really means * it if it's failing a control message. */ LogFlow(("%s: vusbMsgDoTransfer: failed submitting urb! failing it with %s (rc=%Rrc)!!!\n", pUrb->pszDesc, rc == VERR_VUSB_DEVICE_NOT_ATTACHED ? "DNR" : "CRC", rc)); pExtra->Urb.enmStatus = rc == VERR_VUSB_DEVICE_NOT_ATTACHED ? VUSBSTATUS_DNR : VUSBSTATUS_CRC; pExtra->Urb.enmState = VUSBURBSTATE_REAPED; vusbMsgCompletion(&pExtra->Urb); } } /** * Fails a URB request with a pipe STALL error. * * @returns VINF_SUCCESS indicating that we've completed the URB. * @param pUrb The URB in question. */ static int vusbMsgStall(PVUSBURB pUrb) { PVUSBPIPE pPipe = &pUrb->pVUsb->pDev->aPipes[pUrb->EndPt]; PVUSBCTRLEXTRA pExtra = pPipe->pCtrl; LogFlow(("%s: vusbMsgStall: pPipe=%p err=STALL stage %s->SETUP\n", pUrb->pszDesc, pPipe, g_apszCtlStates[pExtra->enmStage])); pExtra->pbCur = NULL; pExtra->enmStage = CTLSTAGE_SETUP; pUrb->enmState = VUSBURBSTATE_REAPED; pUrb->enmStatus = VUSBSTATUS_STALL; vusbUrbCompletionRh(pUrb); return VINF_SUCCESS; } /** * Submit a control message. * * Here we implement the USB defined traffic that occurs in message pipes * (aka control endpoints). We want to provide a single function for device * drivers so that they don't all have to reimplement the usb logic for * themselves. This means we need to keep a little bit of state information * because control transfers occur over multiple bus transactions. We may * also need to buffer data over multiple data stages. * * @returns VBox status code. * @param pUrb The URB to submit. */ static int vusbUrbSubmitCtrl(PVUSBURB pUrb) { #ifdef LOG_ENABLED vusbUrbTrace(pUrb, "vusbUrbSubmitCtrl", false); #endif PVUSBDEV pDev = pUrb->pVUsb->pDev; PVUSBPIPE pPipe = &pDev->aPipes[pUrb->EndPt]; RTCritSectEnter(&pPipe->CritSectCtrl); PVUSBCTRLEXTRA pExtra = pPipe->pCtrl; if (!pExtra && !(pExtra = pPipe->pCtrl = vusbMsgAllocExtraData(pUrb))) { RTCritSectLeave(&pPipe->CritSectCtrl); return VERR_VUSB_NO_URB_MEMORY; } PVUSBSETUP pSetup = pExtra->pMsg; if (pPipe->async) { AssertMsgFailed(("%u\n", pPipe->async)); RTCritSectLeave(&pPipe->CritSectCtrl); return VERR_GENERAL_FAILURE; } /* * A setup packet always resets the transaction and the * end of data transmission is signified by change in * data direction. */ if (pUrb->enmDir == VUSBDIRECTION_SETUP) { LogFlow(("%s: vusbUrbSubmitCtrl: pPipe=%p state %s->SETUP\n", pUrb->pszDesc, pPipe, g_apszCtlStates[pExtra->enmStage])); pExtra->enmStage = CTLSTAGE_SETUP; } else if ( pExtra->enmStage == CTLSTAGE_DATA /* (the STATUS stage direction goes the other way) */ && !!(pSetup->bmRequestType & VUSB_DIR_TO_HOST) != (pUrb->enmDir == VUSBDIRECTION_IN)) { LogFlow(("%s: vusbUrbSubmitCtrl: pPipe=%p state %s->STATUS\n", pUrb->pszDesc, pPipe, g_apszCtlStates[pExtra->enmStage])); pExtra->enmStage = CTLSTAGE_STATUS; } /* * Act according to the current message stage. */ switch (pExtra->enmStage) { case CTLSTAGE_SETUP: /* * When stall handshake is returned, all subsequent packets * must generate stall until a setup packet arrives. */ if (pUrb->enmDir != VUSBDIRECTION_SETUP) { Log(("%s: vusbUrbSubmitCtrl: Stall at setup stage (dir=%#x)!!\n", pUrb->pszDesc, pUrb->enmDir)); vusbMsgStall(pUrb); break; } /* Store setup details, return DNR if corrupt */ if (!vusbMsgSetup(pPipe, pUrb->abData, pUrb->cbData)) { pUrb->enmState = VUSBURBSTATE_REAPED; pUrb->enmStatus = VUSBSTATUS_DNR; vusbUrbCompletionRh(pUrb); break; } if (pPipe->pCtrl != pExtra) { pExtra = pPipe->pCtrl; pSetup = pExtra->pMsg; } /* pre-buffer our output if it's device-to-host */ if (pSetup->bmRequestType & VUSB_DIR_TO_HOST) vusbMsgDoTransfer(pUrb, pSetup, pExtra, pPipe); else if (pSetup->wLength) { LogFlow(("%s: vusbUrbSubmitCtrl: stage=SETUP - to dev: need data\n", pUrb->pszDesc)); pUrb->enmState = VUSBURBSTATE_REAPED; vusbMsgSetupCompletion(pUrb); vusbUrbCompletionRh(pUrb); } /* * If there is no DATA stage, we must send it now since there are * no requirement of a STATUS stage. */ else { LogFlow(("%s: vusbUrbSubmitCtrl: stage=SETUP - to dev: sending\n", pUrb->pszDesc)); vusbMsgDoTransfer(pUrb, pSetup, pExtra, pPipe); } break; case CTLSTAGE_DATA: { /* * If a data stage exceeds the target buffer indicated in * setup return stall, if data stage returns stall there * will be no status stage. */ uint8_t *pbData = (uint8_t *)(pExtra->pMsg + 1); if (&pExtra->pbCur[pUrb->cbData] > &pbData[pSetup->wLength]) { if (!pSetup->wLength) /* happens during iPhone detection with iTunes (correct?) */ { Log(("%s: vusbUrbSubmitCtrl: pSetup->wLength == 0!! (iPhone)\n", pUrb->pszDesc)); pSetup->wLength = pUrb->cbData; } /* Variable length data transfers */ if ( (pSetup->bmRequestType & VUSB_DIR_TO_HOST) || pSetup->wLength == 0 || (pUrb->cbData % pSetup->wLength) == 0) /* magic which need explaining... */ { uint8_t *pbEnd = pbData + pSetup->wLength; int cbLeft = pbEnd - pExtra->pbCur; LogFlow(("%s: vusbUrbSubmitCtrl: Var DATA, pUrb->cbData %d -> %d\n", pUrb->pszDesc, pUrb->cbData, cbLeft)); pUrb->cbData = cbLeft; } else { Log(("%s: vusbUrbSubmitCtrl: Stall at data stage!!\n", pUrb->pszDesc)); vusbMsgStall(pUrb); break; } } if (pUrb->enmDir == VUSBDIRECTION_IN) { /* put data received from the device. */ const uint32_t cbRead = RT_MIN(pUrb->cbData, pExtra->cbLeft); memcpy(pUrb->abData, pExtra->pbCur, cbRead); /* advance */ pExtra->pbCur += cbRead; if (pUrb->cbData == cbRead) pExtra->cbLeft -= pUrb->cbData; else { /* adjust the pUrb->cbData to reflect the number of bytes containing actual data. */ LogFlow(("%s: vusbUrbSubmitCtrl: adjusting last DATA pUrb->cbData, %d -> %d\n", pUrb->pszDesc, pUrb->cbData, pExtra->cbLeft)); pUrb->cbData = cbRead; pExtra->cbLeft = 0; } } else { /* get data for sending when completed. */ memcpy(pExtra->pbCur, pUrb->abData, pUrb->cbData); /* advance */ pExtra->pbCur += pUrb->cbData; /* * If we've got the necessary data, we'll send it now since there are * no requirement of a STATUS stage. */ if ( !pExtra->fSubmitted && pExtra->pbCur - pbData >= pSetup->wLength) { LogFlow(("%s: vusbUrbSubmitCtrl: stage=DATA - to dev: sending\n", pUrb->pszDesc)); vusbMsgDoTransfer(pUrb, pSetup, pExtra, pPipe); break; } } pUrb->enmState = VUSBURBSTATE_REAPED; vusbMsgDataCompletion(pUrb); vusbUrbCompletionRh(pUrb); break; } case CTLSTAGE_STATUS: if ( (pSetup->bmRequestType & VUSB_DIR_TO_HOST) || pExtra->fSubmitted) { Assert(pExtra->fSubmitted); pUrb->enmState = VUSBURBSTATE_REAPED; vusbMsgStatusCompletion(pUrb); vusbUrbCompletionRh(pUrb); } else { LogFlow(("%s: vusbUrbSubmitCtrl: stage=STATUS - to dev: sending\n", pUrb->pszDesc)); vusbMsgDoTransfer(pUrb, pSetup, pExtra, pPipe); } break; } RTCritSectLeave(&pPipe->CritSectCtrl); return VINF_SUCCESS; } /** * Submit a interrupt URB. * * @returns VBox status code. * @param pUrb The URB to submit. */ static int vusbUrbSubmitInterrupt(PVUSBURB pUrb) { LogFlow(("%s: vusbUrbSubmitInterrupt: (sync)\n", pUrb->pszDesc)); return vusbUrbQueueAsyncRh(pUrb); } /** * Submit a bulk URB. * * @returns VBox status code. * @param pUrb The URB to submit. */ static int vusbUrbSubmitBulk(PVUSBURB pUrb) { LogFlow(("%s: vusbUrbSubmitBulk: (async)\n", pUrb->pszDesc)); return vusbUrbQueueAsyncRh(pUrb); } /** * Submit an isochronous URB. * * @returns VBox status code. * @param pUrb The URB to submit. */ static int vusbUrbSubmitIsochronous(PVUSBURB pUrb) { LogFlow(("%s: vusbUrbSubmitIsochronous: (async)\n", pUrb->pszDesc)); return vusbUrbQueueAsyncRh(pUrb); } /** * Fail a URB with a 'hard-error' sort of error. * * @return VINF_SUCCESS (the Urb status indicates the error). * @param pUrb The URB. */ int vusbUrbSubmitHardError(PVUSBURB pUrb) { /* FIXME: Find out the correct return code from the spec */ pUrb->enmState = VUSBURBSTATE_REAPED; pUrb->enmStatus = VUSBSTATUS_DNR; vusbUrbCompletionRh(pUrb); return VINF_SUCCESS; } /** * Submit a URB. */ int vusbUrbSubmit(PVUSBURB pUrb) { vusbUrbAssert(pUrb); Assert(pUrb->enmState == VUSBURBSTATE_ALLOCATED); PVUSBDEV pDev = pUrb->pVUsb->pDev; PVUSBPIPE pPipe = NULL; Assert(pDev); /* * Check that the device is in a valid state. */ const VUSBDEVICESTATE enmState = vusbDevGetState(pDev); if (enmState == VUSB_DEVICE_STATE_RESET) { LogRel(("VUSB: %s: power off ignored, the device is resetting!\n", pDev->pUsbIns->pszName)); pUrb->enmStatus = VUSBSTATUS_DNR; /* This will postpone the TDs until we're done with the resetting. */ return VERR_VUSB_DEVICE_IS_RESETTING; } #ifdef LOG_ENABLED /* stamp it */ pUrb->pVUsb->u64SubmitTS = RTTimeNanoTS(); #endif /** @todo Check max packet size here too? */ /* * Validate the pipe. */ if (pUrb->EndPt >= VUSB_PIPE_MAX) { Log(("%s: pDev=%p[%s]: SUBMIT: ep %i >= %i!!!\n", pUrb->pszDesc, pDev, pDev->pUsbIns->pszName, pUrb->EndPt, VUSB_PIPE_MAX)); return vusbUrbSubmitHardError(pUrb); } PCVUSBDESCENDPOINTEX pEndPtDesc; switch (pUrb->enmDir) { case VUSBDIRECTION_IN: pEndPtDesc = pDev->aPipes[pUrb->EndPt].in; pPipe = &pDev->aPipes[pUrb->EndPt]; break; case VUSBDIRECTION_SETUP: case VUSBDIRECTION_OUT: default: pEndPtDesc = pDev->aPipes[pUrb->EndPt].out; pPipe = &pDev->aPipes[pUrb->EndPt]; break; } if (!pEndPtDesc) { Log(("%s: pDev=%p[%s]: SUBMIT: no endpoint!!! dir=%s e=%i\n", pUrb->pszDesc, pDev, pDev->pUsbIns->pszName, vusbUrbDirName(pUrb->enmDir), pUrb->EndPt)); return vusbUrbSubmitHardError(pUrb); } /* * Check for correct transfer types. * Our type codes are the same - what a coincidence. */ if ((pEndPtDesc->Core.bmAttributes & 0x3) != pUrb->enmType) { /* Bulk and interrupt transfers are identical on the bus level (the only difference * is in how they are scheduled by the HCD/HC) and need an exemption. * Atheros AR9271 is a known offender; its configuration descriptors include * interrupt endpoints, but drivers (Win7/8, Linux kernel pre-3.05) treat them * as bulk endpoints. */ if ( (pUrb->enmType == VUSBXFERTYPE_BULK && (pEndPtDesc->Core.bmAttributes & 0x3) == VUSBXFERTYPE_INTR) || (pUrb->enmType == VUSBXFERTYPE_INTR && (pEndPtDesc->Core.bmAttributes & 0x3) == VUSBXFERTYPE_BULK)) { Log2(("%s: pDev=%p[%s]: SUBMIT: mixing bulk/interrupt transfers on DstAddress=%i ep=%i dir=%s\n", pUrb->pszDesc, pDev, pDev->pUsbIns->pszName, pUrb->DstAddress, pUrb->EndPt, vusbUrbDirName(pUrb->enmDir))); } else { Log(("%s: pDev=%p[%s]: SUBMIT: %s transfer requested for %#x endpoint on DstAddress=%i ep=%i dir=%s\n", pUrb->pszDesc, pDev, pDev->pUsbIns->pszName, vusbUrbTypeName(pUrb->enmType), pEndPtDesc->Core.bmAttributes, pUrb->DstAddress, pUrb->EndPt, vusbUrbDirName(pUrb->enmDir))); return vusbUrbSubmitHardError(pUrb); } } /* * If there's a URB in the read-ahead buffer, use it. */ int rc; if (pDev->hSniffer) { rc = VUSBSnifferRecordEvent(pDev->hSniffer, pUrb, VUSBSNIFFEREVENT_SUBMIT); if (RT_FAILURE(rc)) LogRel(("VUSB: Capturing URB submit event failed with %Rrc\n", rc)); } #ifdef VBOX_WITH_USB if (pPipe && pPipe->hBuffer) { rc = vusbBufferedPipeSubmitUrb(pPipe->hBuffer, pUrb); return rc; } #endif /* * Take action based on type. */ pUrb->enmState = VUSBURBSTATE_IN_FLIGHT; switch (pUrb->enmType) { case VUSBXFERTYPE_CTRL: rc = vusbUrbSubmitCtrl(pUrb); break; case VUSBXFERTYPE_BULK: rc = vusbUrbSubmitBulk(pUrb); break; case VUSBXFERTYPE_INTR: rc = vusbUrbSubmitInterrupt(pUrb); break; case VUSBXFERTYPE_ISOC: rc = vusbUrbSubmitIsochronous(pUrb); break; default: AssertMsgFailed(("Unexpected pUrb type %d\n", pUrb->enmType)); return vusbUrbSubmitHardError(pUrb); } /* * The device was detached, so we fail everything. * (We should really detach and destroy the device, but we'll have to wait till Main reacts.) */ if (rc == VERR_VUSB_DEVICE_NOT_ATTACHED) rc = vusbUrbSubmitHardError(pUrb); /* * We don't increment error count if async URBs are in flight, in * this case we just assume we need to throttle back, this also * makes sure we don't halt bulk endpoints at the wrong time. */ else if ( RT_FAILURE(rc) && !ASMAtomicReadU32(&pDev->aPipes[pUrb->EndPt].async) /* && pUrb->enmType == VUSBXFERTYPE_BULK ?? */ && !vusbUrbErrorRh(pUrb)) { /* don't retry it anymore. */ pUrb->enmState = VUSBURBSTATE_REAPED; pUrb->enmStatus = VUSBSTATUS_CRC; vusbUrbCompletionRh(pUrb); return VINF_SUCCESS; } return rc; } /** * Reap in-flight URBs. * * @param pUrbLst Pointer to the head of the URB list. * @param cMillies Number of milliseconds to block in each reap operation. * Use 0 to not block at all. */ void vusbUrbDoReapAsync(PRTLISTANCHOR pUrbLst, RTMSINTERVAL cMillies) { PVUSBURBVUSB pVUsbUrb = RTListGetFirst(pUrbLst, VUSBURBVUSBINT, NdLst); while (pVUsbUrb) { vusbUrbAssert(pVUsbUrb->pUrb); PVUSBURBVUSB pVUsbUrbNext = RTListGetNext(pUrbLst, pVUsbUrb, VUSBURBVUSBINT, NdLst); PVUSBDEV pDev = pVUsbUrb->pDev; /* Don't touch resetting devices - paranoid safety precaution. */ if (vusbDevGetState(pDev) != VUSB_DEVICE_STATE_RESET) { /* * Reap most URBs pending on a single device. */ PVUSBURB pRipe; /** * This is workaround for race(should be fixed) detach on one EMT thread and frame boundary timer on other * and leaked URBs (shouldn't be affected by leaked URBs). */ Assert(pDev->pUsbIns); while ( pDev->pUsbIns && ((pRipe = pDev->pUsbIns->pReg->pfnUrbReap(pDev->pUsbIns, cMillies)) != NULL)) { vusbUrbAssert(pRipe); if (pRipe == pVUsbUrbNext->pUrb) pVUsbUrbNext = RTListGetNext(pUrbLst, pVUsbUrb, VUSBURBVUSBINT, NdLst); vusbUrbRipe(pRipe); } } /* next */ pVUsbUrb = pVUsbUrbNext; } } /** * Reap URBs on a per device level. * * @returns nothing. * @param pDev The device instance to reap URBs for. * @param cMillies Number of milliseconds to block in each reap operation. * Use 0 to not block at all. */ void vusbUrbDoReapAsyncDev(PVUSBDEV pDev, RTMSINTERVAL cMillies) { Assert(pDev->enmState != VUSB_DEVICE_STATE_RESET); /* * Reap most URBs pending on a single device. */ PVUSBURB pRipe; /** * This is workaround for race(should be fixed) detach on one EMT thread and frame boundary timer on other * and leaked URBs (shouldn't be affected by leaked URBs). */ if (ASMAtomicXchgBool(&pDev->fWokenUp, false)) return; Assert(pDev->pUsbIns); while ( pDev->pUsbIns && ((pRipe = pDev->pUsbIns->pReg->pfnUrbReap(pDev->pUsbIns, cMillies)) != NULL)) { vusbUrbAssert(pRipe); vusbUrbRipe(pRipe); if (ASMAtomicXchgBool(&pDev->fWokenUp, false)) break; } } /** * Completes the URB. */ static void vusbUrbCompletion(PVUSBURB pUrb) { Assert(pUrb->pVUsb->pDev->aPipes); ASMAtomicDecU32(&pUrb->pVUsb->pDev->aPipes[pUrb->EndPt].async); if (pUrb->enmState == VUSBURBSTATE_REAPED) vusbUrbUnlink(pUrb); #ifdef VBOX_WITH_USB // Read-ahead URBs are handled differently if (pUrb->pVUsb->pvBuffered) vusbBufferedPipeCompleteUrb(pUrb); else #endif vusbUrbCompletionRh(pUrb); } /** * The worker for vusbUrbCancel() which is executed on the I/O thread. * * @returns IPRT status code. * @param pUrb The URB to cancel. * @param enmMode The way the URB should be canceled. */ DECLHIDDEN(int) vusbUrbCancelWorker(PVUSBURB pUrb, CANCELMODE enmMode) { vusbUrbAssert(pUrb); #ifdef VBOX_WITH_STATISTICS PVUSBROOTHUB pRh = vusbDevGetRh(pUrb->pVUsb->pDev); #endif if (pUrb->enmState == VUSBURBSTATE_IN_FLIGHT) { LogFlow(("%s: vusbUrbCancel: Canceling in-flight\n", pUrb->pszDesc)); STAM_COUNTER_INC(&pRh->Total.StatUrbsCancelled); if (pUrb->enmType != VUSBXFERTYPE_MSG) { STAM_STATS({Assert(pUrb->enmType >= 0 && pUrb->enmType < (int)RT_ELEMENTS(pRh->aTypes));}); STAM_COUNTER_INC(&pRh->aTypes[pUrb->enmType].StatUrbsCancelled); } pUrb->enmState = VUSBURBSTATE_CANCELLED; PPDMUSBINS pUsbIns = pUrb->pVUsb->pDev->pUsbIns; pUsbIns->pReg->pfnUrbCancel(pUsbIns, pUrb); Assert(pUrb->enmState == VUSBURBSTATE_CANCELLED || pUrb->enmState == VUSBURBSTATE_REAPED); pUrb->enmStatus = VUSBSTATUS_CRC; vusbUrbCompletion(pUrb); } else if (pUrb->enmState == VUSBURBSTATE_REAPED) { LogFlow(("%s: vusbUrbCancel: Canceling reaped urb\n", pUrb->pszDesc)); STAM_COUNTER_INC(&pRh->Total.StatUrbsCancelled); if (pUrb->enmType != VUSBXFERTYPE_MSG) { STAM_STATS({Assert(pUrb->enmType >= 0 && pUrb->enmType < (int)RT_ELEMENTS(pRh->aTypes));}); STAM_COUNTER_INC(&pRh->aTypes[pUrb->enmType].StatUrbsCancelled); } pUrb->enmStatus = VUSBSTATUS_CRC; vusbUrbCompletion(pUrb); } else { AssertMsg(pUrb->enmState == VUSBURBSTATE_CANCELLED, ("Invalid state %d, pUrb=%p\n", pUrb->enmState, pUrb)); switch (enmMode) { default: AssertMsgFailed(("Invalid cancel mode\n")); case CANCELMODE_FAIL: pUrb->enmStatus = VUSBSTATUS_CRC; break; case CANCELMODE_UNDO: pUrb->enmStatus = VUSBSTATUS_UNDO; break; } } return VINF_SUCCESS; } /** * Cancels an URB with CRC failure. * * Cancelling an URB is a tricky thing. The USBProxy backend can not * all cancel it and we must keep the URB around until it's ripe and * can be reaped the normal way. However, we must complete the URB * now, before leaving this function. This is not nice. sigh. * * This function will cancel the URB if it's in-flight and complete * it. The device will in its pfnCancel method be given the chance to * say that the URB doesn't need reaping and should be unlinked. * * An URB which is in the cancel state after pfnCancel will remain in that * state and in the async list until its reaped. When it's finally reaped * it will be unlinked and freed without doing any completion. * * There are different modes of canceling an URB. When devices are being * disconnected etc., they will be completed with an error (CRC). However, * when the HC needs to temporarily halt communication with a device, the * URB/TD must be left alone if possible. * * @param pUrb The URB to cancel. * @param mode The way the URB should be canceled. */ void vusbUrbCancel(PVUSBURB pUrb, CANCELMODE mode) { int rc = vusbDevIoThreadExecSync(pUrb->pVUsb->pDev, (PFNRT)vusbUrbCancelWorker, 2, pUrb, mode); AssertRC(rc); } /** * Async version of vusbUrbCancel() - doesn't wait for the cancelling to be complete. */ void vusbUrbCancelAsync(PVUSBURB pUrb, CANCELMODE mode) { /* Don't try to cancel the URB when completion is in progress at the moment. */ if (!ASMAtomicXchgBool(&pUrb->fCompleting, true)) { int rc = vusbDevIoThreadExec(pUrb->pVUsb->pDev, 0 /* fFlags */, (PFNRT)vusbUrbCancelWorker, 2, pUrb, mode); AssertRC(rc); } } /** * Deals with a ripe URB (i.e. after reaping it). * * If an URB is in the reaped or in-flight state, we'll * complete it. If it's cancelled, we'll simply free it. * Any other states should never get here. * * @param pUrb The URB. */ void vusbUrbRipe(PVUSBURB pUrb) { if ( pUrb->enmState == VUSBURBSTATE_IN_FLIGHT || pUrb->enmState == VUSBURBSTATE_REAPED) { pUrb->enmState = VUSBURBSTATE_REAPED; if (!ASMAtomicXchgBool(&pUrb->fCompleting, true)) vusbUrbCompletion(pUrb); } else if (pUrb->enmState == VUSBURBSTATE_CANCELLED) { vusbUrbUnlink(pUrb); LogFlow(("%s: vusbUrbRipe: Freeing cancelled URB\n", pUrb->pszDesc)); pUrb->pVUsb->pfnFree(pUrb); } else AssertMsgFailed(("Invalid URB state %d; %s\n", pUrb->enmState, pUrb->pszDesc)); } /* * Local Variables: * mode: c * c-file-style: "bsd" * c-basic-offset: 4 * tab-width: 4 * indent-tabs-mode: s * End: */