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/* $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();
}
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