/* $Id: PDMAsyncCompletion.cpp 20187 2009-06-02 12:39:15Z vboxsync $ */ /** @file * PDM Async I/O - Transport data asynchronous in R3 using EMT. */ /* * Copyright (C) 2006-2008 Sun Microsystems, Inc. * * 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. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa * Clara, CA 95054 USA or visit http://www.sun.com if you need * additional information or have any questions. */ /******************************************************************************* * Header Files * *******************************************************************************/ #define LOG_GROUP LOG_GROUP_PDM_ASYNC_COMPLETION #include "PDMInternal.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include "PDMAsyncCompletionInternal.h" /** * Async I/O type. */ typedef enum PDMASYNCCOMPLETIONTEMPLATETYPE { /** Device . */ PDMASYNCCOMPLETIONTEMPLATETYPE_DEV = 1, /** Driver consumer. */ PDMASYNCCOMPLETIONTEMPLATETYPE_DRV, /** Internal consumer. */ PDMASYNCCOMPLETIONTEMPLATETYPE_INTERNAL, /** Usb consumer. */ PDMASYNCCOMPLETIONTEMPLATETYPE_USB } PDMASYNCTEMPLATETYPE; /** * PDM Async I/O template. */ typedef struct PDMASYNCCOMPLETIONTEMPLATE { /** Pointer to the next template in the list. */ R3PTRTYPE(PPDMASYNCCOMPLETIONTEMPLATE) pNext; /** Pointer to the previous template in the list. */ R3PTRTYPE(PPDMASYNCCOMPLETIONTEMPLATE) pPrev; /** Type specific data. */ union { /** PDMASYNCCOMPLETIONTEMPLATETYPE_DEV */ struct { /** Pointer to consumer function. */ R3PTRTYPE(PFNPDMASYNCCOMPLETEDEV) pfnCompleted; /** Pointer to the device instance owning the template. */ R3PTRTYPE(PPDMDEVINS) pDevIns; } Dev; /** PDMASYNCCOMPLETIONTEMPLATETYPE_DRV */ struct { /** Pointer to consumer function. */ R3PTRTYPE(PFNPDMASYNCCOMPLETEDRV) pfnCompleted; /** Pointer to the driver instance owning the template. */ R3PTRTYPE(PPDMDRVINS) pDrvIns; /** User agument given during template creation. * This is only here to make things much easier * for DrVVD. */ void *pvTemplateUser; } Drv; /** PDMASYNCCOMPLETIONTEMPLATETYPE_INTERNAL */ struct { /** Pointer to consumer function. */ R3PTRTYPE(PFNPDMASYNCCOMPLETEINT) pfnCompleted; /** Pointer to user data. */ R3PTRTYPE(void *) pvUser; } Int; /** PDMASYNCCOMPLETIONTEMPLATETYPE_USB */ struct { /** Pointer to consumer function. */ R3PTRTYPE(PFNPDMASYNCCOMPLETEUSB) pfnCompleted; /** Pointer to the usb instance owning the template. */ R3PTRTYPE(PPDMUSBINS) pUsbIns; } Usb; } u; /** Template type. */ PDMASYNCCOMPLETIONTEMPLATETYPE enmType; /** Pointer to the VM. */ R3PTRTYPE(PVM) pVM; /** Use count of the template. */ volatile uint32_t cUsed; } PDMASYNCCOMPLETIONTEMPLATE; static void pdmR3AsyncCompletionPutTask(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, PPDMASYNCCOMPLETIONTASK pTask, bool fLocal); /** * Internal worker for the creation apis * * @returns VBox status. * @param pVM VM handle. * @param ppTemplate Where to store the template handle. */ static int pdmR3AsyncCompletionTemplateCreate(PVM pVM, PPPDMASYNCCOMPLETIONTEMPLATE ppTemplate, PDMASYNCCOMPLETIONTEMPLATETYPE enmType) { int rc = VINF_SUCCESS; if (ppTemplate == NULL) { AssertMsgFailed(("ppTemplate is NULL\n")); return VERR_INVALID_PARAMETER; } PPDMASYNCCOMPLETIONTEMPLATE pTemplate; rc = MMR3HeapAllocZEx(pVM, MM_TAG_PDM_ASYNC_COMPLETION, sizeof(PDMASYNCCOMPLETIONTEMPLATE), (void **)&pTemplate); if (RT_FAILURE(rc)) return rc; /* * Initialize fields. */ pTemplate->pVM = pVM; pTemplate->cUsed = 0; pTemplate->enmType = enmType; /* * Add template to the global VM template list. */ pTemplate->pNext = pVM->pdm.s.pAsyncCompletionTemplates; if (pVM->pdm.s.pAsyncCompletionTemplates) pVM->pdm.s.pAsyncCompletionTemplates->pPrev = pTemplate; pVM->pdm.s.pAsyncCompletionTemplates = pTemplate; *ppTemplate = pTemplate; return VINF_SUCCESS; } /** * Creates a async completion template for a device instance. * * The template is used when creating new completion tasks. * * @returns VBox status code. * @param pVM Pointer to the shared VM structure. * @param pDevIns The device instance. * @param ppTemplate Where to store the template pointer on success. * @param pfnCompleted The completion callback routine. * @param pszDesc Description. */ VMMR3DECL(int) PDMR3AsyncCompletionTemplateCreateDevice(PVM pVM, PPDMDEVINS pDevIns, PPPDMASYNCCOMPLETIONTEMPLATE ppTemplate, PFNPDMASYNCCOMPLETEDEV pfnCompleted, const char *pszDesc) { LogFlow(("%s: pDevIns=%p ppTemplate=%p pfnCompleted=%p pszDesc=%s\n", __FUNCTION__, pDevIns, ppTemplate, pfnCompleted, pszDesc)); /* * Validate input. */ VM_ASSERT_EMT(pVM); if (!pfnCompleted) { AssertMsgFailed(("No completion callback!\n")); return VERR_INVALID_PARAMETER; } if (!ppTemplate) { AssertMsgFailed(("Template pointer is NULL!\n")); return VERR_INVALID_PARAMETER; } /* * Create the template. */ PPDMASYNCCOMPLETIONTEMPLATE pTemplate; int rc = pdmR3AsyncCompletionTemplateCreate(pVM, &pTemplate, PDMASYNCCOMPLETIONTEMPLATETYPE_DEV); if (RT_SUCCESS(rc)) { pTemplate->u.Dev.pDevIns = pDevIns; pTemplate->u.Dev.pfnCompleted = pfnCompleted; *ppTemplate = pTemplate; Log(("PDM: Created device template %p: pfnCompleted=%p pDevIns=%p\n", pTemplate, pfnCompleted, pDevIns)); } return rc; } /** * Creates a async completion template for a driver instance. * * The template is used when creating new completion tasks. * * @returns VBox status code. * @param pVM Pointer to the shared VM structure. * @param pDrvIns The driver instance. * @param ppTemplate Where to store the template pointer on success. * @param pfnCompleted The completion callback routine. * @param pvTemplateUser Template user argument * @param pszDesc Description. */ VMMR3DECL(int) PDMR3AsyncCompletionTemplateCreateDriver(PVM pVM, PPDMDRVINS pDrvIns, PPPDMASYNCCOMPLETIONTEMPLATE ppTemplate, PFNPDMASYNCCOMPLETEDRV pfnCompleted, void *pvTemplateUser, const char *pszDesc) { LogFlow(("%s: pDrvIns=%p ppTemplate=%p pfnCompleted=%p pszDesc=%s\n", __FUNCTION__, pDrvIns, ppTemplate, pfnCompleted, pszDesc)); /* * Validate input. */ VM_ASSERT_EMT(pVM); if (!pfnCompleted) { AssertMsgFailed(("No completion callback!\n")); return VERR_INVALID_PARAMETER; } if (!ppTemplate) { AssertMsgFailed(("Template pointer is NULL!\n")); return VERR_INVALID_PARAMETER; } /* * Create the template. */ PPDMASYNCCOMPLETIONTEMPLATE pTemplate; int rc = pdmR3AsyncCompletionTemplateCreate(pVM, &pTemplate, PDMASYNCCOMPLETIONTEMPLATETYPE_DRV); if (RT_SUCCESS(rc)) { pTemplate->u.Drv.pDrvIns = pDrvIns; pTemplate->u.Drv.pfnCompleted = pfnCompleted; pTemplate->u.Drv.pvTemplateUser = pvTemplateUser; *ppTemplate = pTemplate; Log(("PDM: Created driver template %p: pfnCompleted=%p pDrvIns=%p\n", pTemplate, pfnCompleted, pDrvIns)); } return rc; } /** * Creates a async completion template for a USB device instance. * * The template is used when creating new completion tasks. * * @returns VBox status code. * @param pVM Pointer to the shared VM structure. * @param pUsbIns The USB device instance. * @param ppTemplate Where to store the template pointer on success. * @param pfnCompleted The completion callback routine. * @param pszDesc Description. */ VMMR3DECL(int) PDMR3AsyncCompletionTemplateCreateUsb(PVM pVM, PPDMUSBINS pUsbIns, PPPDMASYNCCOMPLETIONTEMPLATE ppTemplate, PFNPDMASYNCCOMPLETEUSB pfnCompleted, const char *pszDesc) { LogFlow(("%s: pUsbIns=%p ppTemplate=%p pfnCompleted=%p pszDesc=%s\n", __FUNCTION__, pUsbIns, ppTemplate, pfnCompleted, pszDesc)); /* * Validate input. */ VM_ASSERT_EMT(pVM); if (!pfnCompleted) { AssertMsgFailed(("No completion callback!\n")); return VERR_INVALID_PARAMETER; } if (!ppTemplate) { AssertMsgFailed(("Template pointer is NULL!\n")); return VERR_INVALID_PARAMETER; } /* * Create the template. */ PPDMASYNCCOMPLETIONTEMPLATE pTemplate; int rc = pdmR3AsyncCompletionTemplateCreate(pVM, &pTemplate, PDMASYNCCOMPLETIONTEMPLATETYPE_USB); if (RT_SUCCESS(rc)) { pTemplate->u.Usb.pUsbIns = pUsbIns; pTemplate->u.Usb.pfnCompleted = pfnCompleted; *ppTemplate = pTemplate; Log(("PDM: Created usb template %p: pfnCompleted=%p pDevIns=%p\n", pTemplate, pfnCompleted, pUsbIns)); } return rc; } /** * Creates a async completion template for internally by the VMM. * * The template is used when creating new completion tasks. * * @returns VBox status code. * @param pVM Pointer to the shared VM structure. * @param ppTemplate Where to store the template pointer on success. * @param pfnCompleted The completion callback routine. * @param pvUser2 The 2nd user argument for the callback. * @param pszDesc Description. */ VMMR3DECL(int) PDMR3AsyncCompletionTemplateCreateInternal(PVM pVM, PPPDMASYNCCOMPLETIONTEMPLATE ppTemplate, PFNPDMASYNCCOMPLETEINT pfnCompleted, void *pvUser2, const char *pszDesc) { LogFlow(("%s: ppTemplate=%p pfnCompleted=%p pvUser2=%p pszDesc=%s\n", __FUNCTION__, ppTemplate, pfnCompleted, pvUser2, pszDesc)); /* * Validate input. */ VM_ASSERT_EMT(pVM); if (!pfnCompleted) { AssertMsgFailed(("No completion callback!\n")); return VERR_INVALID_PARAMETER; } if (!ppTemplate) { AssertMsgFailed(("Template pointer is NULL!\n")); return VERR_INVALID_PARAMETER; } /* * Create the template. */ PPDMASYNCCOMPLETIONTEMPLATE pTemplate; int rc = pdmR3AsyncCompletionTemplateCreate(pVM, &pTemplate, PDMASYNCCOMPLETIONTEMPLATETYPE_INTERNAL); if (RT_SUCCESS(rc)) { pTemplate->u.Int.pvUser = pvUser2; pTemplate->u.Int.pfnCompleted = pfnCompleted; *ppTemplate = pTemplate; Log(("PDM: Created internal template %p: pfnCompleted=%p pvUser2=%p\n", pTemplate, pfnCompleted, pvUser2)); } return rc; } /** * Destroys the specified async completion template. * * @returns VBox status codes: * @retval VINF_SUCCESS on success. * @retval VERR_PDM_ASYNC_TEMPLATE_BUSY if the template is still in use. * * @param pTemplate The template in question. */ VMMR3DECL(int) PDMR3AsyncCompletionTemplateDestroy(PPDMASYNCCOMPLETIONTEMPLATE pTemplate) { LogFlow(("%s: pTemplate=%p\n", __FUNCTION__, pTemplate)); if (!pTemplate) { AssertMsgFailed(("pTemplate is NULL!\n")); return VERR_INVALID_PARAMETER; } /* * Check if the template is still used. */ if (pTemplate->cUsed > 0) { AssertMsgFailed(("Template is still in use\n")); return VERR_PDM_ASYNC_TEMPLATE_BUSY; } /* * Unlink the template from the list. */ PVM pVM = pTemplate->pVM; PPDMASYNCCOMPLETIONTEMPLATE pPrev = pTemplate->pPrev; PPDMASYNCCOMPLETIONTEMPLATE pNext = pTemplate->pNext; if (pPrev) pPrev->pNext = pNext; else pVM->pdm.s.pAsyncCompletionTemplates = pNext; if (pNext) pNext->pPrev = pPrev; /* * Free the template. */ MMR3HeapFree(pTemplate); return VINF_SUCCESS; } /** * Destroys all the specified async completion templates for the given device instance. * * @returns VBox status codes: * @retval VINF_SUCCESS on success. * @retval VERR_PDM_ASYNC_TEMPLATE_BUSY if one or more of the templates are still in use. * * @param pVM Pointer to the shared VM structure. * @param pDevIns The device instance. */ VMMR3DECL(int) PDMR3AsyncCompletionTemplateDestroyDevice(PVM pVM, PPDMDEVINS pDevIns) { LogFlow(("%s: pDevIns=%p\n", __FUNCTION__, pDevIns)); /* * Validate input. */ if (!pDevIns) return VERR_INVALID_PARAMETER; VM_ASSERT_EMT(pVM); /* * Unlink it. */ PPDMASYNCCOMPLETIONTEMPLATE pTemplate = pVM->pdm.s.pAsyncCompletionTemplates; while (pTemplate) { if ( pTemplate->enmType == PDMASYNCCOMPLETIONTEMPLATETYPE_DEV && pTemplate->u.Dev.pDevIns == pDevIns) { PPDMASYNCCOMPLETIONTEMPLATE pTemplateDestroy = pTemplate; pTemplate = pTemplate->pNext; int rc = PDMR3AsyncCompletionTemplateDestroy(pTemplateDestroy); if (RT_FAILURE(rc)) return rc; } else pTemplate = pTemplate->pNext; } return VINF_SUCCESS; } /** * Destroys all the specified async completion templates for the given driver instance. * * @returns VBox status codes: * @retval VINF_SUCCESS on success. * @retval VERR_PDM_ASYNC_TEMPLATE_BUSY if one or more of the templates are still in use. * * @param pVM Pointer to the shared VM structure. * @param pDrvIns The driver instance. */ VMMR3DECL(int) PDMR3AsyncCompletionTemplateDestroyDriver(PVM pVM, PPDMDRVINS pDrvIns) { LogFlow(("%s: pDevIns=%p\n", __FUNCTION__, pDrvIns)); /* * Validate input. */ if (!pDrvIns) return VERR_INVALID_PARAMETER; VM_ASSERT_EMT(pVM); /* * Unlink it. */ PPDMASYNCCOMPLETIONTEMPLATE pTemplate = pVM->pdm.s.pAsyncCompletionTemplates; while (pTemplate) { if ( pTemplate->enmType == PDMASYNCCOMPLETIONTEMPLATETYPE_DRV && pTemplate->u.Drv.pDrvIns == pDrvIns) { PPDMASYNCCOMPLETIONTEMPLATE pTemplateDestroy = pTemplate; pTemplate = pTemplate->pNext; int rc = PDMR3AsyncCompletionTemplateDestroy(pTemplateDestroy); if (RT_FAILURE(rc)) return rc; } else pTemplate = pTemplate->pNext; } return VINF_SUCCESS; } /** * Destroys all the specified async completion templates for the given USB device instance. * * @returns VBox status codes: * @retval VINF_SUCCESS on success. * @retval VERR_PDM_ASYNC_TEMPLATE_BUSY if one or more of the templates are still in use. * * @param pVM Pointer to the shared VM structure. * @param pUsbIns The USB device instance. */ VMMR3DECL(int) PDMR3AsyncCompletionTemplateDestroyUsb(PVM pVM, PPDMUSBINS pUsbIns) { LogFlow(("%s: pUsbIns=%p\n", __FUNCTION__, pUsbIns)); /* * Validate input. */ if (!pUsbIns) return VERR_INVALID_PARAMETER; VM_ASSERT_EMT(pVM); /* * Unlink it. */ PPDMASYNCCOMPLETIONTEMPLATE pTemplate = pVM->pdm.s.pAsyncCompletionTemplates; while (pTemplate) { if ( pTemplate->enmType == PDMASYNCCOMPLETIONTEMPLATETYPE_USB && pTemplate->u.Usb.pUsbIns == pUsbIns) { PPDMASYNCCOMPLETIONTEMPLATE pTemplateDestroy = pTemplate; pTemplate = pTemplate->pNext; int rc = PDMR3AsyncCompletionTemplateDestroy(pTemplateDestroy); if (RT_FAILURE(rc)) return rc; } else pTemplate = pTemplate->pNext; } return VINF_SUCCESS; } void pdmR3AsyncCompletionCompleteTask(PPDMASYNCCOMPLETIONTASK pTask) { LogFlow(("%s: pTask=%p\n", __FUNCTION__, pTask)); PPDMASYNCCOMPLETIONTEMPLATE pTemplate = pTask->pEndpoint->pTemplate; switch (pTemplate->enmType) { case PDMASYNCCOMPLETIONTEMPLATETYPE_DEV: { pTemplate->u.Dev.pfnCompleted(pTemplate->u.Dev.pDevIns, pTask->pvUser); break; } case PDMASYNCCOMPLETIONTEMPLATETYPE_DRV: { pTemplate->u.Drv.pfnCompleted(pTemplate->u.Drv.pDrvIns, pTemplate->u.Drv.pvTemplateUser, pTask->pvUser); break; } case PDMASYNCCOMPLETIONTEMPLATETYPE_USB: { pTemplate->u.Usb.pfnCompleted(pTemplate->u.Usb.pUsbIns, pTask->pvUser); break; } case PDMASYNCCOMPLETIONTEMPLATETYPE_INTERNAL: { pTemplate->u.Int.pfnCompleted(pTemplate->pVM, pTask->pvUser, pTemplate->u.Int.pvUser); break; } default: AssertMsgFailed(("Unknown template type!\n")); } pdmR3AsyncCompletionPutTask(pTask->pEndpoint, pTask, true); } /** * Worker initializing a endpoint class. * * @returns VBox statis code. * @param pVM Pointer to the shared VM instance data. * @param pEpClass Pointer to the endpoint class structure. * @param pCfgHandle Pointer to the the CFGM tree. */ int pdmR3AsyncCompletionEpClassInit(PVM pVM, PCPDMASYNCCOMPLETIONEPCLASSOPS pEpClassOps, PCFGMNODE pCfgHandle) { int rc = VINF_SUCCESS; /* Validate input. */ if ( !pEpClassOps || (pEpClassOps->u32Version != PDMAC_EPCLASS_OPS_VERSION) || (pEpClassOps->u32VersionEnd != PDMAC_EPCLASS_OPS_VERSION)) AssertMsgFailedReturn(("Invalid endpoint class data\n"), VERR_VERSION_MISMATCH); LogFlowFunc((": pVM=%p pEpClassOps=%p{%s}\n", pVM, pEpClassOps, pEpClassOps->pcszName)); /* Allocate global class data. */ PPDMASYNCCOMPLETIONEPCLASS pEndpointClass = NULL; rc = MMR3HeapAllocZEx(pVM, MM_TAG_PDM_ASYNC_COMPLETION, pEpClassOps->cbEndpointClassGlobal, (void **)&pEndpointClass); if (RT_SUCCESS(rc)) { /* Initialize common data. */ pEndpointClass->pVM = pVM; pEndpointClass->pEndpointOps = pEpClassOps; rc = RTCritSectInit(&pEndpointClass->CritSect); if (RT_SUCCESS(rc)) { PCFGMNODE pCfgNodeClass = CFGMR3GetChild(pCfgHandle, pEpClassOps->pcszName); /* Query the common CFGM options */ rc = CFGMR3QueryU32Def(pCfgNodeClass, "TaskCachePerEndpoint", &pEndpointClass->cEndpointCacheSize, 5); AssertRCReturn(rc, rc); rc = CFGMR3QueryU32Def(pCfgNodeClass, "TaskCachePerClass", &pEndpointClass->cEpClassCacheSize, 50); AssertRCReturn(rc, rc); /* Call the specific endpoint class initializer. */ rc = pEpClassOps->pfnInitialize(pEndpointClass, pCfgNodeClass); if (RT_SUCCESS(rc)) { AssertMsg(!pVM->pdm.s.papAsyncCompletionEndpointClass[pEpClassOps->enmClassType], ("Endpoint class was already initialized\n")); pVM->pdm.s.papAsyncCompletionEndpointClass[pEpClassOps->enmClassType] = pEndpointClass; LogFlowFunc((": Initialized endpoint class \"%s\" rc=%Rrc\n", pEpClassOps->pcszName, rc)); return VINF_SUCCESS; } RTCritSectDelete(&pEndpointClass->CritSect); } MMR3HeapFree(pEndpointClass); } LogFlowFunc((": Failed to initialize endpoint class rc=%Rrc\n", rc)); return rc; } /** * Worker terminating all endpoint classes. * * @returns nothing * @param pEndpointClass Pointer to the endpoint class to terminate. * * @remarks This method ensures that any still open endpoint is closed. */ static void pdmR3AsyncCompletionEpClassTerminate(PPDMASYNCCOMPLETIONEPCLASS pEndpointClass) { int rc = VINF_SUCCESS; PVM pVM = pEndpointClass->pVM; /* Close all still open endpoints. */ while (pEndpointClass->pEndpointsHead) PDMR3AsyncCompletionEpClose(pEndpointClass->pEndpointsHead); /* Destroy all cached tasks. */ for (unsigned i = 0; i < RT_ELEMENTS(pEndpointClass->apTaskCache); i++) { PPDMASYNCCOMPLETIONTASK pTask = pEndpointClass->apTaskCache[i]; while (pTask) { PPDMASYNCCOMPLETIONTASK pTaskFree = pTask; pTask = pTask->pNext; MMR3HeapFree(pTaskFree); } } /* Call the termination callback of the class. */ pEndpointClass->pEndpointOps->pfnTerminate(pEndpointClass); RTCritSectDelete(&pEndpointClass->CritSect); /* Free the memory of the class finally and clear the entry in the class array. */ pVM->pdm.s.papAsyncCompletionEndpointClass[pEndpointClass->pEndpointOps->enmClassType] = NULL; MMR3HeapFree(pEndpointClass); } /** * Initialize the async completion manager. * * @returns VBox status code * @param pVM Pointer to the shared VM structure. */ int pdmR3AsyncCompletionInit(PVM pVM) { int rc = VINF_SUCCESS; LogFlowFunc((": pVM=%p\n", pVM)); VM_ASSERT_EMT(pVM); do { /* Allocate array for global class data. */ rc = MMR3HeapAllocZEx(pVM, MM_TAG_PDM_ASYNC_COMPLETION, sizeof(PPDMASYNCCOMPLETIONEPCLASS) * PDMASYNCCOMPLETIONEPCLASSTYPE_MAX, (void **)&pVM->pdm.s.papAsyncCompletionEndpointClass); if (RT_FAILURE(rc)) break; PCFGMNODE pCfgRoot = CFGMR3GetRoot(pVM); PCFGMNODE pCfgAsyncCompletion = CFGMR3GetChild(CFGMR3GetChild(pCfgRoot, "PDM"), "AsyncCompletion"); rc = pdmR3AsyncCompletionEpClassInit(pVM, &g_PDMAsyncCompletionEndpointClassFile, pCfgAsyncCompletion); if (RT_FAILURE(rc)) break; /* Put other classes here. */ } while (0); LogFlowFunc((": pVM=%p rc=%Rrc\n", pVM, rc)); return rc; } /** * Terminates the async completion manager. * * @returns VBox status code * @param pVM Pointer to the shared VM structure. */ int pdmR3AsyncCompletionTerm(PVM pVM) { LogFlowFunc((": pVM=%p\n", pVM)); if (pVM->pdm.s.papAsyncCompletionEndpointClass) { pdmR3AsyncCompletionEpClassTerminate(pVM->pdm.s.papAsyncCompletionEndpointClass[PDMASYNCCOMPLETIONEPCLASSTYPE_FILE]); MMR3HeapFree(pVM->pdm.s.papAsyncCompletionEndpointClass); } return VINF_SUCCESS; } /** * Tries to get a free task from the endpoint or class cache * allocating the task if it fails. * * @returns Pointer to a new and initialized task or NULL * @param pEndpoint The endpoint the task is for. * @param pvUser Opaque user data for the task. */ static PPDMASYNCCOMPLETIONTASK pdmR3AsyncCompletionGetTask(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, void *pvUser) { PPDMASYNCCOMPLETIONTASK pTask = NULL; /* Try the small per endpoint cache first. */ if (pEndpoint->pTasksFreeHead == pEndpoint->pTasksFreeTail) { /* Try the bigger per endpoint class cache. */ PPDMASYNCCOMPLETIONEPCLASS pEndpointClass = pEndpoint->pEpClass; /* We start with the assigned slot id to distribute the load when allocating new tasks. */ unsigned iSlot = pEndpoint->iSlotStart; do { pTask = (PPDMASYNCCOMPLETIONTASK)ASMAtomicXchgPtr((void * volatile *)&pEndpointClass->apTaskCache[iSlot], NULL); if (pTask) break; iSlot = (iSlot + 1) % RT_ELEMENTS(pEndpointClass->apTaskCache); } while (iSlot != pEndpoint->iSlotStart); if (!pTask) { /* * Allocate completely new. * If this fails we return NULL. */ int rc = MMR3HeapAllocZEx(pEndpointClass->pVM, MM_TAG_PDM_ASYNC_COMPLETION, pEndpointClass->pEndpointOps->cbTask, (void **)&pTask); if (RT_FAILURE(rc)) pTask = NULL; } else { /* Remove the first element and put the rest into the slot again. */ PPDMASYNCCOMPLETIONTASK pTaskHeadNew = pTask->pNext; /* Put back into the list adding any new tasks. */ while (true) { bool fChanged = ASMAtomicCmpXchgPtr((void * volatile *)&pEndpointClass->apTaskCache[iSlot], pTaskHeadNew, NULL); if (fChanged) break; PPDMASYNCCOMPLETIONTASK pTaskHead = (PPDMASYNCCOMPLETIONTASK)ASMAtomicXchgPtr((void * volatile *)&pEndpointClass->apTaskCache[iSlot], NULL); /* The new task could be taken inbetween */ if (pTaskHead) { /* Go to the end of the probably much shorter new list. */ PPDMASYNCCOMPLETIONTASK pTaskTail = pTaskHead; while (pTaskTail->pNext) pTaskTail = pTaskTail->pNext; /* Concatenate */ pTaskTail->pNext = pTaskHeadNew; pTaskHeadNew = pTaskHead; } /* Another round trying to change the list. */ } /* We got a task from the global cache so decrement the counter */ ASMAtomicDecU32(&pEndpointClass->cTasksCached); } } else { /* Grab a free task from the head. */ AssertMsg(pEndpoint->cTasksCached > 0, ("No tasks cached but list contain more than one element\n")); pTask = pEndpoint->pTasksFreeHead; pEndpoint->pTasksFreeHead = pTask->pNext; ASMAtomicDecU32(&pEndpoint->cTasksCached); } if (RT_LIKELY(pTask)) { /* Get ID of the task. */ pTask->uTaskId = ASMAtomicIncU32(&pEndpoint->uTaskIdNext); /* Initialize common parts. */ pTask->pvUser = pvUser; pTask->pEndpoint = pEndpoint; /* Clear list pointers for safety. */ pTask->pPrev = NULL; pTask->pNext = NULL; } return pTask; } /** * Puts a task in one of the caches. * * @returns nothing. * @param pEndpoint The endpoint the task belongs to. * @param pTask The task to cache. * @param fLocal Whether the per endpoint cache should be tried first. */ static void pdmR3AsyncCompletionPutTask(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, PPDMASYNCCOMPLETIONTASK pTask, bool fLocal) { PPDMASYNCCOMPLETIONEPCLASS pEndpointClass = pEndpoint->pEpClass; /* Check whether we can use the per endpoint cache */ if ( fLocal && (pEndpoint->cTasksCached < pEndpointClass->cEndpointCacheSize)) { /* Add it to the list. */ pTask->pPrev = NULL; pEndpoint->pTasksFreeTail->pNext = pTask; pEndpoint->pTasksFreeTail = pTask; ASMAtomicIncU32(&pEndpoint->cTasksCached); } else if (ASMAtomicReadU32(&pEndpoint->cTasksCached) < pEndpointClass->cEpClassCacheSize) { /* Use the global cache. */ ASMAtomicIncU32(&pEndpointClass->cTasksCached); PPDMASYNCCOMPLETIONTASK pNext; do { pNext = pEndpointClass->apTaskCache[pEndpoint->iSlotStart]; pTask->pNext = pNext; } while (!ASMAtomicCmpXchgPtr((void * volatile *)&pEndpointClass->apTaskCache[pEndpoint->iSlotStart], (void *)pTask, (void *)pNext)); } else { /* Free it */ MMR3HeapFree(pTask); } } VMMR3DECL(int) PDMR3AsyncCompletionEpCreateForFile(PPPDMASYNCCOMPLETIONENDPOINT ppEndpoint, const char *pszFilename, uint32_t fFlags, PPDMASYNCCOMPLETIONTEMPLATE pTemplate) { int rc = VINF_SUCCESS; LogFlowFunc((": ppEndpoint=%p pszFilename=%p{%s} fFlags=%u pTemplate=%p\n", ppEndpoint, pszFilename, pszFilename, fFlags, pTemplate)); /* Sanity checks. */ AssertReturn(VALID_PTR(ppEndpoint), VERR_INVALID_POINTER); AssertReturn(VALID_PTR(pszFilename), VERR_INVALID_POINTER); AssertReturn(VALID_PTR(pTemplate), VERR_INVALID_POINTER); /* Check that the flags are valid. */ AssertReturn(((~(PDMACEP_FILE_FLAGS_READ_ONLY | PDMACEP_FILE_FLAGS_CACHING) & fFlags) == 0), VERR_INVALID_PARAMETER); PVM pVM = pTemplate->pVM; PPDMASYNCCOMPLETIONEPCLASS pEndpointClass = pVM->pdm.s.papAsyncCompletionEndpointClass[PDMASYNCCOMPLETIONEPCLASSTYPE_FILE]; PPDMASYNCCOMPLETIONENDPOINT pEndpoint = NULL; AssertMsg(pEndpointClass, ("File endpoint class was not initialized\n")); rc = MMR3HeapAllocZEx(pVM, MM_TAG_PDM_ASYNC_COMPLETION, pEndpointClass->pEndpointOps->cbEndpoint, (void **)&pEndpoint); if (RT_SUCCESS(rc)) { /* Initialize common parts. */ pEndpoint->pNext = NULL; pEndpoint->pPrev = NULL; pEndpoint->pEpClass = pEndpointClass; pEndpoint->pTasksFreeHead = NULL; pEndpoint->pTasksFreeTail = NULL; pEndpoint->cTasksCached = 0; pEndpoint->uTaskIdNext = 0; pEndpoint->fTaskIdWraparound = false; pEndpoint->pTemplate = pTemplate; pEndpoint->iSlotStart = pEndpointClass->cEndpoints % RT_ELEMENTS(pEndpointClass->apTaskCache); /* Init the cache. */ rc = MMR3HeapAllocZEx(pVM, MM_TAG_PDM_ASYNC_COMPLETION, pEndpointClass->pEndpointOps->cbTask, (void **)&pEndpoint->pTasksFreeHead); if (RT_SUCCESS(rc)) { pEndpoint->pTasksFreeTail = pEndpoint->pTasksFreeHead; /* Call the initializer for the endpoint. */ rc = pEndpointClass->pEndpointOps->pfnEpInitialize(pEndpoint, pszFilename, fFlags); if (RT_SUCCESS(rc)) { /* Link it into the list of endpoints. */ rc = RTCritSectEnter(&pEndpointClass->CritSect); AssertMsg(RT_SUCCESS(rc), ("Failed to enter critical section rc=%Rrc\n", rc)); pEndpoint->pNext = pEndpointClass->pEndpointsHead; if (pEndpointClass->pEndpointsHead) pEndpointClass->pEndpointsHead->pPrev = pEndpoint; pEndpointClass->pEndpointsHead = pEndpoint; pEndpointClass->cEndpoints++; rc = RTCritSectLeave(&pEndpointClass->CritSect); AssertMsg(RT_SUCCESS(rc), ("Failed to enter critical section rc=%Rrc\n", rc)); /* Reference the template. */ ASMAtomicIncU32(&pTemplate->cUsed); *ppEndpoint = pEndpoint; LogFlowFunc((": Created endpoint for %s: rc=%Rrc\n", pszFilename, rc)); return VINF_SUCCESS; } MMR3HeapFree(pEndpoint->pTasksFreeHead); } MMR3HeapFree(pEndpoint); } LogFlowFunc((": Creation of endpoint for %s failed: rc=%Rrc\n", pszFilename, rc)); return rc; } VMMR3DECL(void) PDMR3AsyncCompletionEpClose(PPDMASYNCCOMPLETIONENDPOINT pEndpoint) { LogFlowFunc((": pEndpoint=%p\n", pEndpoint)); /* Sanity checks. */ AssertReturnVoid(VALID_PTR(pEndpoint)); PPDMASYNCCOMPLETIONEPCLASS pEndpointClass = pEndpoint->pEpClass; pEndpointClass->pEndpointOps->pfnEpClose(pEndpoint); /* Free cached tasks. */ PPDMASYNCCOMPLETIONTASK pTask = pEndpoint->pTasksFreeHead; while (pTask) { PPDMASYNCCOMPLETIONTASK pTaskFree = pTask; pTask = pTask->pNext; MMR3HeapFree(pTaskFree); } /* Drop reference from the template. */ ASMAtomicDecU32(&pEndpoint->pTemplate->cUsed); /* Unlink the endpoint from the list. */ int rc = RTCritSectEnter(&pEndpointClass->CritSect); AssertMsg(RT_SUCCESS(rc), ("Failed to enter critical section rc=%Rrc\n", rc)); PPDMASYNCCOMPLETIONENDPOINT pEndpointNext = pEndpoint->pNext; PPDMASYNCCOMPLETIONENDPOINT pEndpointPrev = pEndpoint->pPrev; if (pEndpointPrev) pEndpointPrev->pNext = pEndpointNext; else pEndpointClass->pEndpointsHead = pEndpointNext; if (pEndpointNext) pEndpointNext->pPrev = pEndpointPrev; pEndpointClass->cEndpoints--; rc = RTCritSectLeave(&pEndpointClass->CritSect); AssertMsg(RT_SUCCESS(rc), ("Failed to enter critical section rc=%Rrc\n", rc)); MMR3HeapFree(pEndpoint); } VMMR3DECL(int) PDMR3AsyncCompletionEpRead(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, RTFOFF off, PCPDMDATASEG paSegments, size_t cSegments, size_t cbRead, void *pvUser, PPPDMASYNCCOMPLETIONTASK ppTask) { int rc = VINF_SUCCESS; AssertReturn(VALID_PTR(pEndpoint), VERR_INVALID_POINTER); AssertReturn(VALID_PTR(paSegments), VERR_INVALID_POINTER); AssertReturn(VALID_PTR(ppTask), VERR_INVALID_POINTER); AssertReturn(cSegments > 0, VERR_INVALID_PARAMETER); AssertReturn(cbRead > 0, VERR_INVALID_PARAMETER); AssertReturn(off >= 0, VERR_INVALID_PARAMETER); PPDMASYNCCOMPLETIONTASK pTask; pTask = pdmR3AsyncCompletionGetTask(pEndpoint, pvUser); if (!pTask) return VERR_NO_MEMORY; rc = pEndpoint->pEpClass->pEndpointOps->pfnEpRead(pTask, pEndpoint, off, paSegments, cSegments, cbRead); if (RT_SUCCESS(rc)) { *ppTask = pTask; } else pdmR3AsyncCompletionPutTask(pEndpoint, pTask, false); return rc; } VMMR3DECL(int) PDMR3AsyncCompletionEpWrite(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, RTFOFF off, PCPDMDATASEG paSegments, size_t cSegments, size_t cbWrite, void *pvUser, PPPDMASYNCCOMPLETIONTASK ppTask) { int rc = VINF_SUCCESS; AssertReturn(VALID_PTR(pEndpoint), VERR_INVALID_POINTER); AssertReturn(VALID_PTR(paSegments), VERR_INVALID_POINTER); AssertReturn(VALID_PTR(ppTask), VERR_INVALID_POINTER); AssertReturn(cSegments > 0, VERR_INVALID_PARAMETER); AssertReturn(cbWrite > 0, VERR_INVALID_PARAMETER); AssertReturn(off >= 0, VERR_INVALID_PARAMETER); PPDMASYNCCOMPLETIONTASK pTask; pTask = pdmR3AsyncCompletionGetTask(pEndpoint, pvUser); if (!pTask) return VERR_NO_MEMORY; rc = pEndpoint->pEpClass->pEndpointOps->pfnEpWrite(pTask, pEndpoint, off, paSegments, cSegments, cbWrite); if (RT_SUCCESS(rc)) { *ppTask = pTask; } else pdmR3AsyncCompletionPutTask(pEndpoint, pTask, false); return rc; } VMMR3DECL(int) PDMR3AsyncCompletionEpFlush(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, void *pvUser, PPPDMASYNCCOMPLETIONTASK ppTask) { int rc = VINF_SUCCESS; AssertReturn(VALID_PTR(pEndpoint), VERR_INVALID_POINTER); AssertReturn(VALID_PTR(ppTask), VERR_INVALID_POINTER); PPDMASYNCCOMPLETIONTASK pTask; pTask = pdmR3AsyncCompletionGetTask(pEndpoint, pvUser); if (!pTask) return VERR_NO_MEMORY; rc = pEndpoint->pEpClass->pEndpointOps->pfnEpFlush(pTask, pEndpoint); if (RT_SUCCESS(rc)) { *ppTask = pTask; } else pdmR3AsyncCompletionPutTask(pEndpoint, pTask, false); return rc; } VMMR3DECL(int) PDMR3AsyncCompletionEpGetSize(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, uint64_t *pcbSize) { AssertReturn(VALID_PTR(pEndpoint), VERR_INVALID_POINTER); AssertReturn(VALID_PTR(pcbSize), VERR_INVALID_POINTER); return pEndpoint->pEpClass->pEndpointOps->pfnEpGetSize(pEndpoint, pcbSize); } VMMR3DECL(int) PDMR3AsyncCompletionTaskCancel(PPDMASYNCCOMPLETIONTASK pTask) { return VERR_NOT_IMPLEMENTED; }