/* $Id: initterm-r0drv-linux.c $ */ /** @file * IPRT - Initialization & Termination, R0 Driver, Linux. */ /* * Copyright (C) 2006-2019 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. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE 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. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #include "the-linux-kernel.h" #include "internal/iprt.h" #include <iprt/errcore.h> #include <iprt/assert.h> #include "internal/initterm.h" /********************************************************************************************************************************* * Global Variables * *********************************************************************************************************************************/ /** The IPRT work queue. */ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 41) static struct workqueue_struct *g_prtR0LnxWorkQueue; #else static DECLARE_TASK_QUEUE(g_rtR0LnxWorkQueue); #endif /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ /* in alloc-r0drv0-linux.c */ DECLHIDDEN(void) rtR0MemExecCleanup(void); /** * Pushes an item onto the IPRT work queue. * * @param pWork The work item. * @param pfnWorker The callback function. It will be called back * with @a pWork as argument. */ DECLHIDDEN(void) rtR0LnxWorkqueuePush(RTR0LNXWORKQUEUEITEM *pWork, void (*pfnWorker)(RTR0LNXWORKQUEUEITEM *)) { IPRT_LINUX_SAVE_EFL_AC(); #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 41) # if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20) INIT_WORK(pWork, pfnWorker); # else INIT_WORK(pWork, (void (*)(void *))pfnWorker, pWork); # endif queue_work(g_prtR0LnxWorkQueue, pWork); #else INIT_TQUEUE(pWork, (void (*)(void *))pfnWorker, pWork); queue_task(pWork, &g_rtR0LnxWorkQueue); #endif IPRT_LINUX_RESTORE_EFL_AC(); } /** * Flushes all items in the IPRT work queue. * * @remarks This is mostly for 2.4.x compatability. Must not be called from * atomic contexts or with unncessary locks held. */ DECLHIDDEN(void) rtR0LnxWorkqueueFlush(void) { IPRT_LINUX_SAVE_EFL_AC(); #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 41) flush_workqueue(g_prtR0LnxWorkQueue); #else run_task_queue(&g_rtR0LnxWorkQueue); #endif IPRT_LINUX_RESTORE_EFL_AC(); } DECLHIDDEN(int) rtR0InitNative(void) { int rc = VINF_SUCCESS; IPRT_LINUX_SAVE_EFL_AC(); #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 41) #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 13) g_prtR0LnxWorkQueue = create_workqueue("iprt-VBoxWQueue"); #else g_prtR0LnxWorkQueue = create_workqueue("iprt-VBoxQ"); #endif if (!g_prtR0LnxWorkQueue) rc = VERR_NO_MEMORY; #endif IPRT_LINUX_RESTORE_EFL_AC(); return rc; } DECLHIDDEN(void) rtR0TermNative(void) { IPRT_LINUX_SAVE_EFL_AC(); rtR0LnxWorkqueueFlush(); #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 41) destroy_workqueue(g_prtR0LnxWorkQueue); g_prtR0LnxWorkQueue = NULL; #endif rtR0MemExecCleanup(); IPRT_LINUX_RESTORE_EFL_AC(); }