source: vbox/trunk/src/VBox/Additions/linux/module/cmc.c@ 1

/** @file
 *
 */

/*
 * Copyright (C) 2006 InnoTek Systemberatung GmbH
 *
 * 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 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.
 *
 * If you received this file as part of a commercial VirtualBox
 * distribution, then only the terms of your commercial VirtualBox
 * license agreement apply instead of the previous paragraph.
 */

#if 0
  #ifndef bool /* Linux 2.6.19 C++ nightmare */
  #define bool bool_type
  #define true true_type
  #define false false_type
  #define _Bool int
  #define bool_cmc_c
  #endif
  #include <linux/autoconf.h>
  #include <linux/version.h>
  #if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 0)
  # undef ALIGN
  #endif
  #ifndef KBUILD_STR
  # if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16)
  #  define KBUILD_STR(s) s
  # else
  #  define KBUILD_STR(s) #s
  # endif
  #endif
  /* Make (at least) RHEL3U5 happy. */
  #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
  // # define EXPORT_SYMTAB
  #endif
  #include <linux/module.h>
  #include <linux/kernel.h>
  #include <linux/fs.h>
  #include <linux/mm.h>
  #include <linux/wait.h>
  #include <linux/pci.h>
  #include <linux/delay.h>
  #include <linux/interrupt.h>
  #include <linux/completion.h>
  #include <asm/uaccess.h>
  #ifdef bool_cmc_c
  #undef bool
  #undef true
  #undef false
  #undef _Bool
  #undef bool_cmc_c
  #endif
#endif

#include "the-linux-kernel.h"

// What is this for?
// bird: see comment on the other #undef.
#undef ALIGN
#include "vboxmod.h"
/* #include "waitcompat.h" */

/**
 * HGCM
 *
 */
static DECLVBGL(void)
vboxadd_hgcm_callback (
    VMMDevHGCMRequestHeader *pHeader,
    void *pvData,
    uint32_t u32Data
    )
{
    VBoxDevice *dev = pvData;

    wait_event (dev->eventq, pHeader->fu32Flags & VBOX_HGCM_REQ_DONE);
}

static int vboxadd_hgcm_connect (
    VBoxDevice *dev,
    VBoxGuestHGCMConnectInfo *info
    )
{
    int rc = VbglHGCMConnect (info, vboxadd_hgcm_callback, dev, 0);
    return rc;
}

static int vboxadd_hgcm_disconnect (
    VBoxDevice *dev,
    VBoxGuestHGCMDisconnectInfo *info
    )
{
    int rc = VbglHGCMDisconnect (info, vboxadd_hgcm_callback, dev, 0);
    return rc;
}

static int vboxadd_hgcm_call (
    VBoxDevice *dev,
    VBoxGuestHGCMCallInfo *info
    )
{
    int rc = VbglHGCMCall (info, vboxadd_hgcm_callback, dev, 0);
    return rc;
}

DECLVBGL (int) vboxadd_cmc_call (void *opaque, uint32_t func, void *data)
{
    switch (func)
    {
        case IOCTL_VBOXGUEST_HGCM_CONNECT:
            return vboxadd_hgcm_connect (opaque, data);

        case IOCTL_VBOXGUEST_HGCM_DISCONNECT:
            return vboxadd_hgcm_disconnect (opaque, data);

        case IOCTL_VBOXGUEST_HGCM_CALL:
            return vboxadd_hgcm_call (opaque, data);

        default:
            return VERR_VBGL_IOCTL_FAILED;
    }
}

int vboxadd_cmc_init (void)
{
    return 0;
}

void vboxadd_cmc_fini (void)
{
}

DECLVBGL (int)
vboxadd_cmc_ctl_guest_filter_mask (uint32_t or_mask, uint32_t not_mask)
{
        int rc;
        VMMDevCtlGuestFilterMask *req;

        rc = VbglGRAlloc ((VMMDevRequestHeader**) &req, sizeof (*req),
                          VMMDevReq_CtlGuestFilterMask);

        if (VBOX_FAILURE (rc)) {
                elog ("VbglGRAlloc (CtlGuestFilterMask) failed rc=%d\n", rc);
                return -1;
        }

        req->u32OrMask = or_mask;
        req->u32NotMask = not_mask;

        rc = VbglGRPerform (&req->header);
        VbglGRFree (&req->header);
        if (VBOX_FAILURE (rc)) {
                elog ("VbglGRPerform (CtlGuestFilterMask) failed rc=%d\n", rc);
                return -1;
        }
        return 0;
}

EXPORT_SYMBOL (vboxadd_cmc_call);
EXPORT_SYMBOL (vboxadd_cmc_ctl_guest_filter_mask);