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Diffstat (limited to 'include/VBox/vmm/pdmqueue.h')
| -rw-r--r-- | include/VBox/vmm/pdmqueue.h | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/include/VBox/vmm/pdmqueue.h b/include/VBox/vmm/pdmqueue.h new file mode 100644 index 00000000..a932ec28 --- /dev/null +++ b/include/VBox/vmm/pdmqueue.h @@ -0,0 +1,169 @@ +/** @file + * PDM - Pluggable Device Manager, Queues. + */ + +/* + * Copyright (C) 2006-2022 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + +#ifndef VBOX_INCLUDED_vmm_pdmqueue_h +#define VBOX_INCLUDED_vmm_pdmqueue_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include <VBox/types.h> + +RT_C_DECLS_BEGIN + +/** @defgroup grp_pdm_queue The PDM Queues API + * @ingroup grp_pdm + * @{ + */ + +/** Pointer to a PDM queue. */ +typedef struct PDMQUEUE *PPDMQUEUE; + +/** Pointer to a PDM queue item core. */ +typedef union PDMQUEUEITEMCORE *PPDMQUEUEITEMCORE; + +/** + * PDM queue item core. + */ +typedef union PDMQUEUEITEMCORE +{ + /** The next queue item on the pending list (UINT32_MAX for NIL). */ + uint32_t volatile iNext; + /** The next item about to be flushed. */ + R3PTRTYPE(PPDMQUEUEITEMCORE) pNext; + /** Make sure the core is 64-bit wide. */ + uint64_t u64View; +} PDMQUEUEITEMCORE; + + +/** + * Queue consumer callback for devices. + * + * @returns Success indicator. + * If false the item will not be removed and the flushing will stop. + * @param pDevIns The device instance. + * @param pItem The item to consume. Upon return this item will be freed. + * @remarks The device critical section will NOT be entered before calling the + * callback. No locks will be held, but for now it's safe to assume + * that only one EMT will do queue callbacks at any one time. + */ +typedef DECLCALLBACKTYPE(bool, FNPDMQUEUEDEV,(PPDMDEVINS pDevIns, PPDMQUEUEITEMCORE pItem)); +/** Pointer to a FNPDMQUEUEDEV(). */ +typedef FNPDMQUEUEDEV *PFNPDMQUEUEDEV; + +/** + * Queue consumer callback for USB devices. + * + * @returns Success indicator. + * If false the item will not be removed and the flushing will stop. + * @param pUsbIns The USB device instance. + * @param pItem The item to consume. Upon return this item will be freed. + * @remarks No locks will be held, but for now it's safe to assume that only one + * EMT will do queue callbacks at any one time. + */ +typedef DECLCALLBACKTYPE(bool, FNPDMQUEUEUSB,(PPDMUSBINS pUsbIns, PPDMQUEUEITEMCORE pItem)); +/** Pointer to a FNPDMQUEUEUSB(). */ +typedef FNPDMQUEUEUSB *PFNPDMQUEUEUSB; + +/** + * Queue consumer callback for drivers. + * + * @returns Success indicator. + * If false the item will not be removed and the flushing will stop. + * @param pDrvIns The driver instance. + * @param pItem The item to consume. Upon return this item will be freed. + * @remarks No locks will be held, but for now it's safe to assume that only one + * EMT will do queue callbacks at any one time. + */ +typedef DECLCALLBACKTYPE(bool, FNPDMQUEUEDRV,(PPDMDRVINS pDrvIns, PPDMQUEUEITEMCORE pItem)); +/** Pointer to a FNPDMQUEUEDRV(). */ +typedef FNPDMQUEUEDRV *PFNPDMQUEUEDRV; + +/** + * Queue consumer callback for internal component. + * + * @returns Success indicator. + * If false the item will not be removed and the flushing will stop. + * @param pVM The cross context VM structure. + * @param pItem The item to consume. Upon return this item will be freed. + * @remarks No locks will be held, but for now it's safe to assume that only one + * EMT will do queue callbacks at any one time. + */ +typedef DECLCALLBACKTYPE(bool, FNPDMQUEUEINT,(PVM pVM, PPDMQUEUEITEMCORE pItem)); +/** Pointer to a FNPDMQUEUEINT(). */ +typedef FNPDMQUEUEINT *PFNPDMQUEUEINT; + +/** + * Queue consumer callback for external component. + * + * @returns Success indicator. + * If false the item will not be removed and the flushing will stop. + * @param pvUser User argument. + * @param pItem The item to consume. Upon return this item will be freed. + * @remarks No locks will be held, but for now it's safe to assume that only one + * EMT will do queue callbacks at any one time. + */ +typedef DECLCALLBACKTYPE(bool, FNPDMQUEUEEXT,(void *pvUser, PPDMQUEUEITEMCORE pItem)); +/** Pointer to a FNPDMQUEUEEXT(). */ +typedef FNPDMQUEUEEXT *PFNPDMQUEUEEXT; + +#ifdef VBOX_IN_VMM +VMMR3_INT_DECL(int) PDMR3QueueCreateDevice(PVM pVM, PPDMDEVINS pDevIns, size_t cbItem, uint32_t cItems, + uint32_t cMilliesInterval, PFNPDMQUEUEDEV pfnCallback, + bool fRZEnabled, const char *pszName, PDMQUEUEHANDLE *phQueue); +VMMR3_INT_DECL(int) PDMR3QueueCreateDriver(PVM pVM, PPDMDRVINS pDrvIns, size_t cbItem, uint32_t cItems, + uint32_t cMilliesInterval, PFNPDMQUEUEDRV pfnCallback, + const char *pszName, PDMQUEUEHANDLE *phQueue); +VMMR3_INT_DECL(int) PDMR3QueueCreateInternal(PVM pVM, size_t cbItem, uint32_t cItems, + uint32_t cMilliesInterval, PFNPDMQUEUEINT pfnCallback, + bool fRZEnabled, const char *pszName, PDMQUEUEHANDLE *phQueue); +VMMR3DECL(int) PDMR3QueueCreateExternal(PVM pVM, size_t cbItem, uint32_t cItems, uint32_t cMilliesInterval, + PFNPDMQUEUEEXT pfnCallback, void *pvUser, const char *pszName, PDMQUEUEHANDLE *phQueue); +VMMR3DECL(int) PDMR3QueueDestroy(PVM pVM, PDMQUEUEHANDLE hQueue, void *pvOwner); +VMMR3_INT_DECL(int) PDMR3QueueDestroyDevice(PVM pVM, PPDMDEVINS pDevIns); +VMMR3_INT_DECL(int) PDMR3QueueDestroyDriver(PVM pVM, PPDMDRVINS pDrvIns); +VMMR3DECL(void) PDMR3QueueFlushAll(PVM pVM); +#endif /* VBOX_IN_VMM */ + +VMMDECL(PPDMQUEUEITEMCORE) PDMQueueAlloc(PVMCC pVM, PDMQUEUEHANDLE hQueue, void *pvOwner); +VMMDECL(int) PDMQueueInsert(PVMCC pVM, PDMQUEUEHANDLE hQueue, void *pvOwner, PPDMQUEUEITEMCORE pInsert); +VMMDECL(int) PDMQueueFlushIfNecessary(PVMCC pVM, PDMQUEUEHANDLE hQueue, void *pvOwner); + +/** @} */ + +RT_C_DECLS_END + +#endif /* !VBOX_INCLUDED_vmm_pdmqueue_h */ + |