Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1491 insertions, 0 deletions

diff --git a/src/VBox/Additions/x11/vboxvideo/vboxvideo.c b/src/VBox/Additions/x11/vboxvideo/vboxvideo.c
new file mode 100644
index 00000000..672f22b0
--- /dev/null
+++ b/src/VBox/Additions/x11/vboxvideo/vboxvideo.c
@@ -0,0 +1,1491 @@
+/* $Id: vboxvideo.c $ */
+/** @file
+ * Linux Additions X11 graphics driver
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ * This file is based on the X.Org VESA driver:
+ *
+ * Copyright (c) 2000 by Conectiva S.A. (http://www.conectiva.com)
+ * Copyright 2008 Red Hat, Inc.
+ * Copyright 2012 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of Conectiva Linux shall
+ * not be used in advertising or otherwise to promote the sale, use or other
+ * dealings in this Software without prior written authorization from
+ * Conectiva Linux.
+ *
+ * Authors: Paulo César Pereira de Andrade <pcpa@conectiva.com.br>
+ *          David Dawes <dawes@xfree86.org>
+ *          Adam Jackson <ajax@redhat.com>
+ *          Dave Airlie <airlied@redhat.com>
+ *          Michael Thayer <michael.thayer@oracle.com>
+ */
+
+#include "vboxvideo.h"
+#include <VBoxVideoVBE.h>
+
+/* Basic definitions and functions needed by all drivers. */
+#include "xf86.h"
+/* For video memory mapping. */
+#include "xf86_OSproc.h"
+#if GET_ABI_MAJOR(ABI_VIDEODRV_VERSION) < 6
+/* PCI resources. */
+# include "xf86Resources.h"
+#endif
+/* Generic server linear frame-buffer APIs. */
+#include "fb.h"
+/* Colormap and visual handling. */
+#include "micmap.h"
+#include "xf86cmap.h"
+/* ShadowFB support */
+#include "shadowfb.h"
+/* VGA hardware functions for setting and restoring text mode */
+#include "vgaHW.h"
+#ifdef VBOXVIDEO_13
+/* X.org 1.3+ mode setting */
+# define _HAVE_STRING_ARCH_strsep /* bits/string2.h, __strsep_1c. */
+# include "xf86Crtc.h"
+# include "xf86Modes.h"
+/* For xf86RandR12GetOriginalVirtualSize(). */
+# include "xf86RandR12.h"
+#endif
+/* For setting the root window property. */
+#include "property.h"
+#include <X11/Xatom.h>
+
+#ifdef XORG_7X
+# include <stdlib.h>
+# include <string.h>
+# include <fcntl.h>
+# include <unistd.h>
+#endif
+
+/* Mandatory functions */
+
+static const OptionInfoRec * VBOXAvailableOptions(int chipid, int busid);
+static void VBOXIdentify(int flags);
+#ifndef PCIACCESS
+static Bool VBOXProbe(DriverPtr drv, int flags);
+#else
+static Bool VBOXPciProbe(DriverPtr drv, int entity_num,
+     struct pci_device *dev, intptr_t match_data);
+#endif
+static Bool VBOXPreInit(ScrnInfoPtr pScrn, int flags);
+static Bool VBOXScreenInit(ScreenPtr pScreen, int argc, char **argv);
+static Bool VBOXEnterVT(ScrnInfoPtr pScrn);
+static void VBOXLeaveVT(ScrnInfoPtr pScrn);
+static Bool VBOXCloseScreen(ScreenPtr pScreen);
+#ifndef VBOXVIDEO_13
+static Bool VBOXSaveScreen(ScreenPtr pScreen, int mode);
+#endif
+static Bool VBOXSwitchMode(ScrnInfoPtr pScrn, DisplayModePtr pMode);
+static void VBOXAdjustFrame(ScrnInfoPtr pScrn, int x, int y);
+static void VBOXFreeScreen(ScrnInfoPtr pScrn);
+#ifndef VBOXVIDEO_13
+static void VBOXDisplayPowerManagementSet(ScrnInfoPtr pScrn, int mode, int flags);
+#endif
+
+/* locally used functions */
+static Bool VBOXMapVidMem(ScrnInfoPtr pScrn);
+static void VBOXUnmapVidMem(ScrnInfoPtr pScrn);
+static void VBOXSaveMode(ScrnInfoPtr pScrn);
+static void VBOXRestoreMode(ScrnInfoPtr pScrn);
+static void setSizesAndCursorIntegration(ScrnInfoPtr pScrn, Bool fScreenInitTime);
+
+#ifndef XF86_SCRN_INTERFACE
+# define xf86ScreenToScrn(pScreen) xf86Screens[(pScreen)->myNum]
+# define xf86ScrnToScreen(pScrn) screenInfo.screens[(pScrn)->scrnIndex]
+#endif
+
+static inline void VBOXSetRec(ScrnInfoPtr pScrn)
+{
+    if (!pScrn->driverPrivate)
+    {
+        VBOXPtr pVBox = (VBOXPtr)xnfcalloc(sizeof(VBOXRec), 1);
+        pScrn->driverPrivate = pVBox;
+#if defined(VBOXVIDEO_13) && defined(RT_OS_LINUX)
+        pVBox->fdACPIDevices = -1;
+#endif
+    }
+}
+
+enum GenericTypes
+{
+    CHIP_VBOX_GENERIC
+};
+
+#ifdef PCIACCESS
+static const struct pci_id_match vbox_device_match[] = {
+    {
+        VBOX_VENDORID, VBOX_DEVICEID, PCI_MATCH_ANY, PCI_MATCH_ANY,
+        0, 0, 0
+    },
+
+    { 0, 0, 0 },
+};
+#endif
+
+/* Supported chipsets */
+static SymTabRec VBOXChipsets[] =
+{
+    {VBOX_DEVICEID, "vbox"},
+    {-1,            NULL}
+};
+
+static PciChipsets VBOXPCIchipsets[] = {
+  { VBOX_DEVICEID, VBOX_DEVICEID, RES_SHARED_VGA },
+  { -1,            -1,            RES_UNDEFINED },
+};
+
+/*
+ * This contains the functions needed by the server after loading the
+ * driver module.  It must be supplied, and gets added the driver list by
+ * the Module Setup function in the dynamic case.  In the static case a
+ * reference to this is compiled in, and this requires that the name of
+ * this DriverRec be an upper-case version of the driver name.
+ */
+
+#ifdef XORG_7X
+_X_EXPORT
+#endif
+DriverRec VBOXVIDEO = {
+    VBOX_VERSION,
+    VBOX_DRIVER_NAME,
+    VBOXIdentify,
+#ifdef PCIACCESS
+    NULL,
+#else
+    VBOXProbe,
+#endif
+    VBOXAvailableOptions,
+    NULL,
+    0,
+#ifdef XORG_7X
+    NULL,
+#endif
+#ifdef PCIACCESS
+    vbox_device_match,
+    VBOXPciProbe
+#endif
+};
+
+/* No options for now */
+static const OptionInfoRec VBOXOptions[] = {
+    { -1, NULL, OPTV_NONE, {0}, FALSE }
+};
+
+#ifndef XORG_7X
+/*
+ * List of symbols from other modules that this module references.  This
+ * list is used to tell the loader that it is OK for symbols here to be
+ * unresolved providing that it hasn't been told that they haven't been
+ * told that they are essential via a call to xf86LoaderReqSymbols() or
+ * xf86LoaderReqSymLists().  The purpose is this is to avoid warnings about
+ * unresolved symbols that are not required.
+ */
+static const char *fbSymbols[] = {
+    "fbPictureInit",
+    "fbScreenInit",
+    NULL
+};
+
+static const char *shadowfbSymbols[] = {
+    "ShadowFBInit2",
+    NULL
+};
+
+static const char *ramdacSymbols[] = {
+    "xf86DestroyCursorInfoRec",
+    "xf86InitCursor",
+    "xf86CreateCursorInfoRec",
+    NULL
+};
+
+static const char *vgahwSymbols[] = {
+    "vgaHWFreeHWRec",
+    "vgaHWGetHWRec",
+    "vgaHWGetIOBase",
+    "vgaHWGetIndex",
+    "vgaHWRestore",
+    "vgaHWSave",
+    "vgaHWSetStdFuncs",
+    NULL
+};
+#endif /* !XORG_7X */
+
+/** Resize the virtual framebuffer. */
+static Bool adjustScreenPixmap(ScrnInfoPtr pScrn, int width, int height)
+{
+    ScreenPtr pScreen = xf86ScrnToScreen(pScrn);
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+    int adjustedWidth = pScrn->bitsPerPixel == 16 ? (width + 1) & ~1 : width;
+    int cbLine = adjustedWidth * pScrn->bitsPerPixel / 8;
+    PixmapPtr pPixmap;
+
+    TRACE_LOG("width=%d, height=%d\n", width, height);
+    AssertMsg(width >= 0 && height >= 0, ("Invalid negative width (%d) or height (%d)\n", width, height));
+    if (pScreen == NULL)  /* Not yet initialised. */
+        return TRUE;
+    pPixmap = pScreen->GetScreenPixmap(pScreen);
+    AssertMsg(pPixmap != NULL, ("Failed to get the screen pixmap.\n"));
+    TRACE_LOG("pPixmap=%p adjustedWidth=%d height=%d pScrn->depth=%d pScrn->bitsPerPixel=%d cbLine=%d pVBox->base=%p pPixmap->drawable.width=%d pPixmap->drawable.height=%d\n",
+              (void *)pPixmap, adjustedWidth, height, pScrn->depth,
+              pScrn->bitsPerPixel, cbLine, pVBox->base,
+              pPixmap->drawable.width, pPixmap->drawable.height);
+    if (   adjustedWidth != pPixmap->drawable.width
+        || height != pPixmap->drawable.height)
+    {
+        if (   adjustedWidth > VBOX_VIDEO_MAX_VIRTUAL || height > VBOX_VIDEO_MAX_VIRTUAL
+            || (unsigned)cbLine * (unsigned)height >= pVBox->cbFBMax)
+        {
+            xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
+                       "Virtual framebuffer %dx%d too large.  For information, video memory: %u Kb.\n",
+                       adjustedWidth, height, (unsigned) pVBox->cbFBMax / 1024);
+            return FALSE;
+        }
+        if (pScrn->vtSema)
+            vbvxClearVRAM(pScrn, ((size_t)pScrn->virtualX) * pScrn->virtualY * (pScrn->bitsPerPixel / 8),
+                          ((size_t)adjustedWidth) * height * (pScrn->bitsPerPixel / 8));
+        pScreen->ModifyPixmapHeader(pPixmap, adjustedWidth, height, pScrn->depth, pScrn->bitsPerPixel, cbLine, pVBox->base);
+    }
+    pScrn->displayWidth = pScrn->virtualX = adjustedWidth;
+    pScrn->virtualY = height;
+    return TRUE;
+}
+
+#ifndef VBOXVIDEO_13
+/** Set a video mode to the hardware, RandR 1.1 version.
+ *
+ * Since we no longer do virtual frame buffers, adjust the screen pixmap
+ * dimensions to match.  The "override" parameters are for when we received a
+ * mode hint while switched to a virtual terminal.  In this case VBoxClient will
+ * have told us about the mode, but not yet been able to do a mode switch using
+ * RandR.  We solve this by setting the requested mode to the host but keeping
+ * the virtual frame-
+ * buffer matching what the X server expects. */
+static void setModeRandR11(ScrnInfoPtr pScrn, DisplayModePtr pMode, Bool fScreenInitTime, Bool fEnterVTTime,
+                           int cXOverRide, int cYOverRide)
+{
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+    struct vbvxFrameBuffer frameBuffer = { 0, 0, pMode->HDisplay, pMode->VDisplay, pScrn->bitsPerPixel};
+    int cXPhysical = cXOverRide > 0 ? min(cXOverRide, pMode->HDisplay) : pMode->HDisplay;
+    int cYPhysical = cYOverRide > 0 ? min(cYOverRide, pMode->VDisplay) : pMode->VDisplay;
+
+    pVBox->pScreens[0].aScreenLocation.cx = pMode->HDisplay;
+    pVBox->pScreens[0].aScreenLocation.cy = pMode->VDisplay;
+    if (fScreenInitTime)
+    {
+        /* The screen structure is not fully set up yet, so do not touch it. */
+        pScrn->displayWidth = pScrn->virtualX = pMode->HDisplay;
+        pScrn->virtualY = pMode->VDisplay;
+    }
+    else
+    {
+        xf86ScrnToScreen(pScrn)->width = pMode->HDisplay;
+        xf86ScrnToScreen(pScrn)->height = pMode->VDisplay;
+        /* This prevents a crash in CentOS 3.  I was unable to debug it to
+         * satisfaction, partly due to the lack of symbols.  My guess is that
+         * pScrn->ModifyPixmapHeader() expects certain things to be set up when
+         * it sees pScrn->vtSema set to true which are not quite done at this
+         * point of the VT switch. */
+        if (fEnterVTTime)
+            pScrn->vtSema = FALSE;
+        adjustScreenPixmap(pScrn, pMode->HDisplay, pMode->VDisplay);
+        if (fEnterVTTime)
+            pScrn->vtSema = TRUE;
+    }
+    if (pMode->HDisplay != 0 && pMode->VDisplay != 0 && pScrn->vtSema)
+        vbvxSetMode(pScrn, 0, cXPhysical, cYPhysical, 0, 0, true, true, &frameBuffer);
+    pScrn->currentMode = pMode;
+}
+#endif
+
+#ifdef VBOXVIDEO_13
+/* X.org 1.3+ mode-setting support ******************************************/
+
+/** Set a video mode to the hardware, RandR 1.2 version.  If this is the first
+ * screen, re-set the current mode for all others (the offset for the first
+ * screen is always treated as zero by the hardware, so all other screens need
+ * to be changed to compensate for any changes!).  The mode to set is taken
+ * from the X.Org Crtc structure. */
+static void setModeRandR12(ScrnInfoPtr pScrn, unsigned cScreen)
+{
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+    unsigned i;
+    struct vbvxFrameBuffer frameBuffer = { pVBox->pScreens[0].paCrtcs->x, pVBox->pScreens[0].paCrtcs->y, pScrn->virtualX,
+                                           pScrn->virtualY, pScrn->bitsPerPixel };
+    unsigned cFirst = cScreen;
+    unsigned cLast = cScreen != 0 ? cScreen + 1 : pVBox->cScreens;
+    int originalX, originalY;
+
+    /* Check that this code cannot trigger the resizing bug in X.Org Server 1.3.
+     * See the work-around in ScreenInit. */
+    xf86RandR12GetOriginalVirtualSize(pScrn, &originalX, &originalY);
+    AssertMsg(originalX == VBOX_VIDEO_MAX_VIRTUAL && originalY == VBOX_VIDEO_MAX_VIRTUAL, ("OriginalSize=%dx%d",
+               originalX, originalY));
+    for (i = cFirst; i < cLast; ++i)
+        if (pVBox->pScreens[i].paCrtcs->mode.HDisplay != 0 && pVBox->pScreens[i].paCrtcs->mode.VDisplay != 0 && pScrn->vtSema)
+            vbvxSetMode(pScrn, i, pVBox->pScreens[i].paCrtcs->mode.HDisplay, pVBox->pScreens[i].paCrtcs->mode.VDisplay,
+                        pVBox->pScreens[i].paCrtcs->x, pVBox->pScreens[i].paCrtcs->y, pVBox->pScreens[i].fPowerOn,
+                        pVBox->pScreens[i].paOutputs->status == XF86OutputStatusConnected, &frameBuffer);
+}
+
+/** Wrapper around setModeRandR12() to avoid exposing non-obvious semantics.
+ */
+static void setAllModesRandR12(ScrnInfoPtr pScrn)
+{
+    setModeRandR12(pScrn, 0);
+}
+
+/* For descriptions of these functions and structures, see
+   hw/xfree86/modes/xf86Crtc.h and hw/xfree86/modes/xf86Modes.h in the
+   X.Org source tree. */
+
+static Bool vbox_config_resize(ScrnInfoPtr pScrn, int cw, int ch)
+{
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+    Bool rc;
+    unsigned i;
+
+    TRACE_LOG("width=%d, height=%d\n", cw, ch);
+    rc = adjustScreenPixmap(pScrn, cw, ch);
+    /* Power-on all screens (the server expects this) and set the new pitch to them. */
+    for (i = 0; i < pVBox->cScreens; ++i)
+        pVBox->pScreens[i].fPowerOn = true;
+    setAllModesRandR12(pScrn);
+    vbvxSetSolarisMouseRange(cw, ch);
+    return rc;
+}
+
+static const xf86CrtcConfigFuncsRec VBOXCrtcConfigFuncs = {
+    vbox_config_resize
+};
+
+static void
+vbox_crtc_dpms(xf86CrtcPtr crtc, int mode)
+{
+    ScrnInfoPtr pScrn = crtc->scrn;
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+    unsigned cDisplay = (uintptr_t)crtc->driver_private;
+
+    TRACE_LOG("mode=%d\n", mode);
+    pVBox->pScreens[cDisplay].fPowerOn = (mode != DPMSModeOff);
+    setModeRandR12(pScrn, cDisplay);
+}
+
+static Bool
+vbox_crtc_lock (xf86CrtcPtr crtc)
+{ RT_NOREF(crtc); return FALSE; }
+
+
+/* We use this function to check whether the X server owns the active virtual
+ * terminal before attempting a mode switch, since the RandR extension isn't
+ * very dilligent here, which can mean crashes if we are unlucky.  This is
+ * not the way it the function is intended - it is meant for reporting modes
+ * which the hardware can't handle.  I hope that this won't confuse any clients
+ * connecting to us. */
+static Bool
+vbox_crtc_mode_fixup (xf86CrtcPtr crtc, DisplayModePtr mode,
+                      DisplayModePtr adjusted_mode)
+{ RT_NOREF(crtc, mode, adjusted_mode); return TRUE; }
+
+static void
+vbox_crtc_stub (xf86CrtcPtr crtc)
+{ RT_NOREF(crtc); }
+
+static void
+vbox_crtc_mode_set (xf86CrtcPtr crtc, DisplayModePtr mode,
+                    DisplayModePtr adjusted_mode, int x, int y)
+{
+    RT_NOREF(mode);
+    VBOXPtr pVBox = VBOXGetRec(crtc->scrn);
+    unsigned cDisplay = (uintptr_t)crtc->driver_private;
+
+    TRACE_LOG("name=%s, HDisplay=%d, VDisplay=%d, x=%d, y=%d\n", adjusted_mode->name,
+           adjusted_mode->HDisplay, adjusted_mode->VDisplay, x, y);
+    pVBox->pScreens[cDisplay].fPowerOn = true;
+    pVBox->pScreens[cDisplay].aScreenLocation.cx = adjusted_mode->HDisplay;
+    pVBox->pScreens[cDisplay].aScreenLocation.cy = adjusted_mode->VDisplay;
+    pVBox->pScreens[cDisplay].aScreenLocation.x = x;
+    pVBox->pScreens[cDisplay].aScreenLocation.y = y;
+    setModeRandR12(crtc->scrn, cDisplay);
+}
+
+static void
+vbox_crtc_gamma_set (xf86CrtcPtr crtc, CARD16 *red,
+                     CARD16 *green, CARD16 *blue, int size)
+{ RT_NOREF(crtc, red, green, blue, size); }
+
+static void *
+vbox_crtc_shadow_allocate (xf86CrtcPtr crtc, int width, int height)
+{ RT_NOREF(crtc, width, height); return NULL; }
+
+static const xf86CrtcFuncsRec VBOXCrtcFuncs = {
+    .dpms = vbox_crtc_dpms,
+    .save = NULL, /* These two are never called by the server. */
+    .restore = NULL,
+    .lock = vbox_crtc_lock,
+    .unlock = NULL, /* This will not be invoked if lock returns FALSE. */
+    .mode_fixup = vbox_crtc_mode_fixup,
+    .prepare = vbox_crtc_stub,
+    .mode_set = vbox_crtc_mode_set,
+    .commit = vbox_crtc_stub,
+    .gamma_set = vbox_crtc_gamma_set,
+    .shadow_allocate = vbox_crtc_shadow_allocate,
+    .shadow_create = NULL, /* These two should not be invoked if allocate
+                              returns NULL. */
+    .shadow_destroy = NULL,
+    .set_cursor_colors = NULL, /* We are still using the old cursor API. */
+    .set_cursor_position = NULL,
+    .show_cursor = NULL,
+    .hide_cursor = NULL,
+    .load_cursor_argb = NULL,
+    .destroy = vbox_crtc_stub
+};
+
+static void
+vbox_output_stub (xf86OutputPtr output)
+{ RT_NOREF(output); }
+
+static void
+vbox_output_dpms (xf86OutputPtr output, int mode)
+{
+    RT_NOREF(output, mode);
+}
+
+static int
+vbox_output_mode_valid (xf86OutputPtr output, DisplayModePtr mode)
+{
+    return MODE_OK;
+}
+
+static Bool
+vbox_output_mode_fixup (xf86OutputPtr output, DisplayModePtr mode,
+                        DisplayModePtr adjusted_mode)
+{ RT_NOREF(output, mode, adjusted_mode); return TRUE; }
+
+static void
+vbox_output_mode_set (xf86OutputPtr output, DisplayModePtr mode,
+                        DisplayModePtr adjusted_mode)
+{ RT_NOREF(output, mode, adjusted_mode); }
+
+static xf86OutputStatus
+vbox_output_detect (xf86OutputPtr output)
+{
+    ScrnInfoPtr pScrn = output->scrn;
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+    uint32_t iScreen = (uintptr_t)output->driver_private;
+    return   pVBox->pScreens[iScreen].afConnected
+           ? XF86OutputStatusConnected : XF86OutputStatusDisconnected;
+}
+
+static DisplayModePtr vbox_output_add_mode(VBOXPtr pVBox, DisplayModePtr *pModes, const char *pszName, int x, int y,
+                                           Bool isPreferred, Bool isUserDef)
+{
+    TRACE_LOG("pszName=%s, x=%d, y=%d\n", pszName ? pszName : "(null)", x, y);
+    DisplayModePtr pMode = xnfcalloc(1, sizeof(DisplayModeRec));
+    int cRefresh = 60;
+
+    pMode->status        = MODE_OK;
+    /* We don't ask the host whether it likes user defined modes,
+     * as we assume that the user really wanted that mode. */
+    pMode->type          = isUserDef ? M_T_USERDEF : M_T_BUILTIN;
+    if (isPreferred)
+        pMode->type     |= M_T_PREFERRED;
+    /* Older versions of VBox only support screen widths which are a multiple
+     * of 8 */
+    if (pVBox->fAnyX)
+        pMode->HDisplay  = x;
+    else
+        pMode->HDisplay  = x & ~7;
+    pMode->HSyncStart    = pMode->HDisplay + 2;
+    pMode->HSyncEnd      = pMode->HDisplay + 4;
+    pMode->HTotal        = pMode->HDisplay + 6;
+    pMode->VDisplay      = y;
+    pMode->VSyncStart    = pMode->VDisplay + 2;
+    pMode->VSyncEnd      = pMode->VDisplay + 4;
+    pMode->VTotal        = pMode->VDisplay + 6;
+    pMode->Clock         = pMode->HTotal * pMode->VTotal * cRefresh / 1000; /* kHz */
+    if (NULL == pszName) {
+        xf86SetModeDefaultName(pMode);
+    } else {
+        pMode->name          = xnfstrdup(pszName);
+    }
+    *pModes = xf86ModesAdd(*pModes, pMode);
+    return pMode;
+}
+
+static DisplayModePtr
+vbox_output_get_modes (xf86OutputPtr output)
+{
+    DisplayModePtr pModes = NULL;
+    DisplayModePtr pPreferred = NULL;
+    ScrnInfoPtr pScrn = output->scrn;
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+
+    TRACE_ENTRY();
+    uint32_t iScreen = (uintptr_t)output->driver_private;
+    pPreferred = vbox_output_add_mode(pVBox, &pModes, NULL,
+                         RT_CLAMP(pVBox->pScreens[iScreen].aPreferredSize.cx, VBOX_VIDEO_MIN_SIZE, VBOX_VIDEO_MAX_VIRTUAL),
+                         RT_CLAMP(pVBox->pScreens[iScreen].aPreferredSize.cy, VBOX_VIDEO_MIN_SIZE, VBOX_VIDEO_MAX_VIRTUAL),
+                         TRUE, FALSE);
+    vbox_output_add_mode(pVBox, &pModes, NULL, 2560, 1600, FALSE, FALSE);
+    vbox_output_add_mode(pVBox, &pModes, NULL, 2560, 1440, FALSE, FALSE);
+    vbox_output_add_mode(pVBox, &pModes, NULL, 2048, 1536, FALSE, FALSE);
+    vbox_output_add_mode(pVBox, &pModes, NULL, 1920, 1600, FALSE, FALSE);
+    vbox_output_add_mode(pVBox, &pModes, NULL, 1920, 1080, FALSE, FALSE);
+    vbox_output_add_mode(pVBox, &pModes, NULL, 1680, 1050, FALSE, FALSE);
+    vbox_output_add_mode(pVBox, &pModes, NULL, 1600, 1200, FALSE, FALSE);
+    vbox_output_add_mode(pVBox, &pModes, NULL, 1400, 1050, FALSE, FALSE);
+    vbox_output_add_mode(pVBox, &pModes, NULL, 1280, 1024, FALSE, FALSE);
+    vbox_output_add_mode(pVBox, &pModes, NULL, 1024, 768,  FALSE, FALSE);
+    vbox_output_add_mode(pVBox, &pModes, NULL, 800,  600,  FALSE, FALSE);
+    vbox_output_add_mode(pVBox, &pModes, NULL, 640,  480,  FALSE, FALSE);
+    VBOXEDIDSet(output, pPreferred);
+    TRACE_EXIT();
+    return pModes;
+}
+
+static const xf86OutputFuncsRec VBOXOutputFuncs = {
+    .create_resources = vbox_output_stub,
+    .dpms = vbox_output_dpms,
+    .save = NULL, /* These two are never called by the server. */
+    .restore = NULL,
+    .mode_valid = vbox_output_mode_valid,
+    .mode_fixup = vbox_output_mode_fixup,
+    .prepare = vbox_output_stub,
+    .commit = vbox_output_stub,
+    .mode_set = vbox_output_mode_set,
+    .detect = vbox_output_detect,
+    .get_modes = vbox_output_get_modes,
+#ifdef RANDR_12_INTERFACE
+     .set_property = NULL,
+#endif
+    .destroy = vbox_output_stub
+};
+#endif /* VBOXVIDEO_13 */
+
+/* Module loader interface */
+static MODULESETUPPROTO(vboxSetup);
+
+static XF86ModuleVersionInfo vboxVersionRec =
+{
+    VBOX_DRIVER_NAME,
+    "Oracle Corporation",
+    MODINFOSTRING1,
+    MODINFOSTRING2,
+#ifdef XORG_7X
+    XORG_VERSION_CURRENT,
+#else
+    XF86_VERSION_CURRENT,
+#endif
+    1,                          /* Module major version. Xorg-specific */
+    0,                          /* Module minor version. Xorg-specific */
+    1,                          /* Module patchlevel. Xorg-specific */
+    ABI_CLASS_VIDEODRV,         /* This is a video driver */
+    ABI_VIDEODRV_VERSION,
+    MOD_CLASS_VIDEODRV,
+    {0, 0, 0, 0}
+};
+
+/*
+ * This data is accessed by the loader.  The name must be the module name
+ * followed by "ModuleData".
+ */
+#ifdef XORG_7X
+_X_EXPORT
+#endif
+XF86ModuleData vboxvideoModuleData = { &vboxVersionRec, vboxSetup, NULL };
+
+static pointer
+vboxSetup(pointer Module, pointer Options, int *ErrorMajor, int *ErrorMinor)
+{
+    static Bool Initialised = FALSE;
+    RT_NOREF(Options, ErrorMinor);
+
+    if (!Initialised)
+    {
+        Initialised = TRUE;
+#ifdef PCIACCESS
+        xf86AddDriver(&VBOXVIDEO, Module, HaveDriverFuncs);
+#else
+        xf86AddDriver(&VBOXVIDEO, Module, 0);
+#endif
+#ifndef XORG_7X
+        LoaderRefSymLists(fbSymbols,
+                          shadowfbSymbols,
+                          ramdacSymbols,
+                          vgahwSymbols,
+                          NULL);
+#endif
+        xf86Msg(X_CONFIG, "Load address of symbol \"VBOXVIDEO\" is %p\n",
+                (void *)&VBOXVIDEO);
+        return (pointer)TRUE;
+    }
+
+    if (ErrorMajor)
+        *ErrorMajor = LDR_ONCEONLY;
+    return (NULL);
+}
+
+
+static const OptionInfoRec *
+VBOXAvailableOptions(int chipid, int busid)
+{
+    RT_NOREF(chipid, busid);
+    return (VBOXOptions);
+}
+
+static void
+VBOXIdentify(int flags)
+{
+    RT_NOREF(flags);
+    xf86PrintChipsets(VBOX_NAME, "guest driver for VirtualBox", VBOXChipsets);
+}
+
+#ifndef XF86_SCRN_INTERFACE
+# define SCRNINDEXAPI(pfn) pfn ## Index
+static Bool VBOXScreenInitIndex(int scrnIndex, ScreenPtr pScreen, int argc, char **argv)
+{
+    RT_NOREF(scrnIndex);
+    return VBOXScreenInit(pScreen, argc, argv);
+}
+
+static Bool VBOXEnterVTIndex(int scrnIndex, int flags)
+{ RT_NOREF(flags); return VBOXEnterVT(xf86Screens[scrnIndex]); }
+
+static void VBOXLeaveVTIndex(int scrnIndex, int flags)
+{ RT_NOREF(flags); VBOXLeaveVT(xf86Screens[scrnIndex]); }
+
+static Bool VBOXCloseScreenIndex(int scrnIndex, ScreenPtr pScreen)
+{ RT_NOREF(scrnIndex); return VBOXCloseScreen(pScreen); }
+
+static Bool VBOXSwitchModeIndex(int scrnIndex, DisplayModePtr pMode, int flags)
+{ RT_NOREF(flags); return VBOXSwitchMode(xf86Screens[scrnIndex], pMode); }
+
+static void VBOXAdjustFrameIndex(int scrnIndex, int x, int y, int flags)
+{ RT_NOREF(flags); VBOXAdjustFrame(xf86Screens[scrnIndex], x, y); }
+
+static void VBOXFreeScreenIndex(int scrnIndex, int flags)
+{ RT_NOREF(flags); VBOXFreeScreen(xf86Screens[scrnIndex]); }
+# else
+# define SCRNINDEXAPI(pfn) pfn
+#endif /* XF86_SCRN_INTERFACE */
+
+static void setScreenFunctions(ScrnInfoPtr pScrn, xf86ProbeProc pfnProbe)
+{
+    pScrn->driverVersion = VBOX_VERSION;
+    pScrn->driverName    = VBOX_DRIVER_NAME;
+    pScrn->name          = VBOX_NAME;
+    pScrn->Probe         = pfnProbe;
+    pScrn->PreInit       = VBOXPreInit;
+    pScrn->ScreenInit    = SCRNINDEXAPI(VBOXScreenInit);
+    pScrn->SwitchMode    = SCRNINDEXAPI(VBOXSwitchMode);
+    pScrn->AdjustFrame   = SCRNINDEXAPI(VBOXAdjustFrame);
+    pScrn->EnterVT       = SCRNINDEXAPI(VBOXEnterVT);
+    pScrn->LeaveVT       = SCRNINDEXAPI(VBOXLeaveVT);
+    pScrn->FreeScreen    = SCRNINDEXAPI(VBOXFreeScreen);
+}
+
+/*
+ * One of these functions is called once, at the start of the first server
+ * generation to do a minimal probe for supported hardware.
+ */
+
+#ifdef PCIACCESS
+static Bool
+VBOXPciProbe(DriverPtr drv, int entity_num, struct pci_device *dev,
+             intptr_t match_data)
+{
+    ScrnInfoPtr pScrn;
+    int drmFd;
+
+    TRACE_ENTRY();
+
+    drmFd = open("/dev/dri/card0", O_RDWR, 0);
+    if (drmFd >= 0)
+    {
+        xf86Msg(X_INFO, "vboxvideo: kernel driver found, not loading.\n");
+        close(drmFd);
+        return FALSE;
+    }
+    /* It is safe to call this, as the X server enables I/O access before
+     * calling the probe call-backs. */
+    if (!xf86EnableIO())
+    {
+        xf86Msg(X_INFO, "vboxvideo: this driver requires direct hardware access.  You may wish to use the kernel driver instead.\n");
+        return FALSE;
+    }
+    pScrn = xf86ConfigPciEntity(NULL, 0, entity_num, VBOXPCIchipsets,
+                                NULL, NULL, NULL, NULL, NULL);
+    if (pScrn != NULL) {
+        VBOXPtr pVBox;
+
+        VBOXSetRec(pScrn);
+        pVBox = VBOXGetRec(pScrn);
+        if (!pVBox)
+            return FALSE;
+        setScreenFunctions(pScrn, NULL);
+        pVBox->pciInfo = dev;
+    }
+
+    TRACE_LOG("returning %s\n", pScrn == NULL ? "false" : "true");
+    return (pScrn != NULL);
+}
+#endif
+
+#ifndef PCIACCESS
+static Bool
+VBOXProbe(DriverPtr drv, int flags)
+{
+    Bool foundScreen = FALSE;
+    int numDevSections;
+    GDevPtr *devSections;
+
+    /*
+     * Find the config file Device sections that match this
+     * driver, and return if there are none.
+     */
+    if ((numDevSections = xf86MatchDevice(VBOX_NAME,
+                      &devSections)) <= 0)
+    return (FALSE);
+
+    /* PCI BUS */
+    if (xf86GetPciVideoInfo())
+    {
+        int numUsed;
+        int *usedChips;
+        int i;
+        numUsed = xf86MatchPciInstances(VBOX_NAME, VBOX_VENDORID,
+                        VBOXChipsets, VBOXPCIchipsets,
+                        devSections, numDevSections,
+                        drv, &usedChips);
+        if (numUsed > 0)
+        {
+            if (flags & PROBE_DETECT)
+                foundScreen = TRUE;
+            else
+                for (i = 0; i < numUsed; i++)
+                {
+                    ScrnInfoPtr pScrn = NULL;
+                    /* Allocate a ScrnInfoRec  */
+                    if ((pScrn = xf86ConfigPciEntity(pScrn,0,usedChips[i],
+                                     VBOXPCIchipsets,NULL,
+                                     NULL,NULL,NULL,NULL)))
+                    {
+                        setScreenFunctions(pScrn, VBOXProbe);
+                        foundScreen = TRUE;
+                    }
+                }
+            free(usedChips);
+        }
+    }
+    free(devSections);
+    return (foundScreen);
+}
+#endif
+
+
+/*
+ * QUOTE from the XFree86 DESIGN document:
+ *
+ * The purpose of this function is to find out all the information
+ * required to determine if the configuration is usable, and to initialise
+ * those parts of the ScrnInfoRec that can be set once at the beginning of
+ * the first server generation.
+ *
+ * (...)
+ *
+ * This includes probing for video memory, clocks, ramdac, and all other
+ * HW info that is needed. It includes determining the depth/bpp/visual
+ * and related info. It includes validating and determining the set of
+ * video modes that will be used (and anything that is required to
+ * determine that).
+ *
+ * This information should be determined in the least intrusive way
+ * possible. The state of the HW must remain unchanged by this function.
+ * Although video memory (including MMIO) may be mapped within this
+ * function, it must be unmapped before returning.
+ *
+ * END QUOTE
+ */
+
+static Bool
+VBOXPreInit(ScrnInfoPtr pScrn, int flags)
+{
+    VBOXPtr pVBox;
+    Gamma gzeros = {0.0, 0.0, 0.0};
+    rgb rzeros = {0, 0, 0};
+
+    TRACE_ENTRY();
+    /* Are we really starting the server, or is this just a dummy run? */
+    if (flags & PROBE_DETECT)
+        return (FALSE);
+
+    xf86DrvMsg(pScrn->scrnIndex, X_INFO,
+               "VirtualBox guest additions video driver version %d.%d\n",
+               VBOX_VERSION_MAJOR, VBOX_VERSION_MINOR);
+
+    /* The ramdac module is needed for the hardware cursor. */
+    if (!xf86LoadSubModule(pScrn, "ramdac"))
+        return FALSE;
+
+    /* The framebuffer module. */
+    if (!xf86LoadSubModule(pScrn, "fb"))
+        return (FALSE);
+
+    if (!xf86LoadSubModule(pScrn, "shadowfb"))
+        return FALSE;
+
+    if (!xf86LoadSubModule(pScrn, "vgahw"))
+        return FALSE;
+
+    /* Get our private data from the ScrnInfoRec structure. */
+    VBOXSetRec(pScrn);
+    pVBox = VBOXGetRec(pScrn);
+    if (!pVBox)
+        return FALSE;
+
+    /* Entity information seems to mean bus information. */
+    pVBox->pEnt = xf86GetEntityInfo(pScrn->entityList[0]);
+
+#ifndef PCIACCESS
+    if (pVBox->pEnt->location.type != BUS_PCI)
+        return FALSE;
+
+    pVBox->pciInfo = xf86GetPciInfoForEntity(pVBox->pEnt->index);
+    pVBox->pciTag = pciTag(pVBox->pciInfo->bus,
+                           pVBox->pciInfo->device,
+                           pVBox->pciInfo->func);
+#endif
+
+    /* Set up our ScrnInfoRec structure to describe our virtual
+       capabilities to X. */
+
+    pScrn->chipset = "vbox";
+    /** @note needed during colourmap initialisation */
+    pScrn->rgbBits = 8;
+
+    /* Let's create a nice, capable virtual monitor. */
+    pScrn->monitor = pScrn->confScreen->monitor;
+    pScrn->monitor->DDC = NULL;
+    pScrn->monitor->nHsync = 1;
+    pScrn->monitor->hsync[0].lo = 1;
+    pScrn->monitor->hsync[0].hi = 10000;
+    pScrn->monitor->nVrefresh = 1;
+    pScrn->monitor->vrefresh[0].lo = 1;
+    pScrn->monitor->vrefresh[0].hi = 100;
+
+    pScrn->progClock = TRUE;
+
+    /* Using the PCI information caused problems with non-powers-of-two
+       sized video RAM configurations */
+    pVBox->cbFBMax = VBoxVideoGetVRAMSize();
+    pScrn->videoRam = pVBox->cbFBMax / 1024;
+
+    /* Check if the chip restricts horizontal resolution or not. */
+    pVBox->fAnyX = VBoxVideoAnyWidthAllowed();
+
+    /* Set up clock information that will support all modes we need. */
+    pScrn->clockRanges = xnfcalloc(sizeof(ClockRange), 1);
+    pScrn->clockRanges->minClock = 1000;
+    pScrn->clockRanges->maxClock = 1000000000;
+    pScrn->clockRanges->clockIndex = -1;
+    pScrn->clockRanges->ClockMulFactor = 1;
+    pScrn->clockRanges->ClockDivFactor = 1;
+
+    if (!xf86SetDepthBpp(pScrn, 24, 0, 0, Support32bppFb))
+        return FALSE;
+    /* We only support 16 and 24 bits depth (i.e. 16 and 32bpp) */
+    if (pScrn->bitsPerPixel != 32 && pScrn->bitsPerPixel != 16)
+    {
+        xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
+                   "The VBox additions only support 16 and 32bpp graphics modes\n");
+        return FALSE;
+    }
+    xf86PrintDepthBpp(pScrn);
+    vboxAddModes(pScrn);
+
+#ifdef VBOXVIDEO_13
+    pScrn->virtualX = VBOX_VIDEO_MAX_VIRTUAL;
+    pScrn->virtualY = VBOX_VIDEO_MAX_VIRTUAL;
+#else
+    /* We don't validate with xf86ValidateModes and xf86PruneModes as we
+     * already know what we like and what we don't. */
+
+    pScrn->currentMode = pScrn->modes;
+
+    /* Set the right virtual resolution. */
+    pScrn->virtualX = pScrn->bitsPerPixel == 16 ? (pScrn->currentMode->HDisplay + 1) & ~1 : pScrn->currentMode->HDisplay;
+    pScrn->virtualY = pScrn->currentMode->VDisplay;
+
+#endif /* !VBOXVIDEO_13 */
+
+    pScrn->displayWidth = pScrn->virtualX;
+
+    xf86PrintModes(pScrn);
+
+    /* VGA hardware initialisation */
+    if (!vgaHWGetHWRec(pScrn))
+        return FALSE;
+    /* Must be called before any VGA registers are saved or restored */
+    vgaHWSetStdFuncs(VGAHWPTR(pScrn));
+    vgaHWGetIOBase(VGAHWPTR(pScrn));
+
+    /* Colour weight - we always call this, since we are always in
+       truecolour. */
+    if (!xf86SetWeight(pScrn, rzeros, rzeros))
+        return (FALSE);
+
+    /* visual init */
+    if (!xf86SetDefaultVisual(pScrn, -1))
+        return (FALSE);
+
+    xf86SetGamma(pScrn, gzeros);
+
+    /* Set the DPI.  Perhaps we should read this from the host? */
+    xf86SetDpi(pScrn, 96, 96);
+
+    if (pScrn->memPhysBase == 0) {
+#ifdef PCIACCESS
+        pScrn->memPhysBase = pVBox->pciInfo->regions[0].base_addr;
+#else
+        pScrn->memPhysBase = pVBox->pciInfo->memBase[0];
+#endif
+        pScrn->fbOffset = 0;
+    }
+
+    TRACE_EXIT();
+    return (TRUE);
+}
+
+/**
+ * Dummy function for setting the colour palette, which we actually never
+ * touch.  However, the server still requires us to provide this.
+ */
+static void
+vboxLoadPalette(ScrnInfoPtr pScrn, int numColors, int *indices,
+          LOCO *colors, VisualPtr pVisual)
+{
+    RT_NOREF(pScrn, numColors, indices, colors, pVisual);
+}
+
+/** Set the graphics and guest cursor support capabilities to the host if
+ *  the user-space helper is running. */
+static void updateGraphicsCapability(ScrnInfoPtr pScrn, Bool hasVT)
+{
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+
+    if (!pVBox->fHaveHGSMIModeHints)
+        return;
+    VBoxHGSMISendCapsInfo(&pVBox->guestCtx,   hasVT
+                                            ? VBVACAPS_VIDEO_MODE_HINTS | VBVACAPS_DISABLE_CURSOR_INTEGRATION
+                                            : VBVACAPS_DISABLE_CURSOR_INTEGRATION);
+}
+
+#ifndef VBOXVIDEO_13
+
+#define PREFERRED_MODE_ATOM_NAME "VBOXVIDEO_PREFERRED_MODE"
+
+static void setSizesRandR11(ScrnInfoPtr pScrn)
+{
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+    DisplayModePtr pNewMode;
+    int32_t propertyValue;
+
+    pNewMode = pScrn->modes != pScrn->currentMode ? pScrn->modes : pScrn->modes->next;
+    pNewMode->HDisplay = RT_CLAMP(pVBox->pScreens[0].aPreferredSize.cx, VBOX_VIDEO_MIN_SIZE, VBOX_VIDEO_MAX_VIRTUAL);
+    pNewMode->VDisplay = RT_CLAMP(pVBox->pScreens[0].aPreferredSize.cy, VBOX_VIDEO_MIN_SIZE, VBOX_VIDEO_MAX_VIRTUAL);
+    propertyValue = (pNewMode->HDisplay << 16) + pNewMode->VDisplay;
+    ChangeWindowProperty(ROOT_WINDOW(pScrn), MakeAtom(PREFERRED_MODE_ATOM_NAME,
+                         sizeof(PREFERRED_MODE_ATOM_NAME) - 1, TRUE), XA_INTEGER, 32,
+                         PropModeReplace, 1, &propertyValue, TRUE);
+}
+
+#endif
+
+static void reprobeCursor(ScrnInfoPtr pScrn)
+{
+    if (ROOT_WINDOW(pScrn) == NULL)
+        return;
+#ifdef XF86_SCRN_INTERFACE
+    pScrn->EnableDisableFBAccess(pScrn, FALSE);
+    pScrn->EnableDisableFBAccess(pScrn, TRUE);
+#else
+    pScrn->EnableDisableFBAccess(pScrn->scrnIndex, FALSE);
+    pScrn->EnableDisableFBAccess(pScrn->scrnIndex, TRUE);
+#endif
+}
+
+static void setSizesAndCursorIntegration(ScrnInfoPtr pScrn, Bool fScreenInitTime)
+{
+    RT_NOREF(fScreenInitTime);
+    TRACE_LOG("fScreenInitTime=%d\n", (int)fScreenInitTime);
+#ifdef VBOXVIDEO_13
+# if GET_ABI_MAJOR(ABI_VIDEODRV_VERSION) >= 5
+    RRGetInfo(xf86ScrnToScreen(pScrn), TRUE);
+# else
+    RRGetInfo(xf86ScrnToScreen(pScrn));
+# endif
+#else
+    setSizesRandR11(pScrn);
+#endif
+    /* This calls EnableDisableFBAccess(), so only use when switched in. */
+    if (pScrn->vtSema)
+        reprobeCursor(pScrn);
+}
+
+/* We update the size hints from the X11 property set by VBoxClient every time
+ * that the X server goes to sleep (to catch the property change request).
+ * Although this is far more often than necessary it should not have real-life
+ * performance consequences and allows us to simplify the code quite a bit. */
+static void vboxBlockHandler(pointer pData,
+#if GET_ABI_MAJOR(ABI_VIDEODRV_VERSION) < 23
+                             OSTimePtr pTimeout,
+                             pointer pReadmask
+#else
+                             void *pTimeout
+#endif
+                  )
+{
+    ScrnInfoPtr pScrn = (ScrnInfoPtr)pData;
+    Bool fNeedUpdate = false;
+
+    RT_NOREF(pTimeout);
+#if GET_ABI_MAJOR(ABI_VIDEODRV_VERSION) < 23
+    RT_NOREF(pReadmask);
+#endif
+    if (pScrn->vtSema)
+        vbvxReadSizesAndCursorIntegrationFromHGSMI(pScrn, &fNeedUpdate);
+    if (fNeedUpdate)
+        setSizesAndCursorIntegration(pScrn, false);
+}
+
+/*
+ * QUOTE from the XFree86 DESIGN document:
+ *
+ * This is called at the start of each server generation.
+ *
+ * (...)
+ *
+ * Decide which operations need to be placed under resource access
+ * control. (...) Map any video memory or other memory regions. (...)
+ * Save the video card state. (...) Initialise the initial video
+ * mode.
+ *
+ * End QUOTE.
+ */
+static Bool VBOXScreenInit(ScreenPtr pScreen, int argc, char **argv)
+{
+    ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+    VisualPtr visual;
+    RT_NOREF(argc, argv);
+
+    TRACE_ENTRY();
+
+    if (!VBOXMapVidMem(pScrn))
+        return (FALSE);
+
+    /* save current video state */
+    VBOXSaveMode(pScrn);
+
+    /* mi layer - reset the visual list (?)*/
+    miClearVisualTypes();
+    if (!miSetVisualTypes(pScrn->depth, TrueColorMask,
+                          pScrn->rgbBits, TrueColor))
+        return (FALSE);
+    if (!miSetPixmapDepths())
+        return (FALSE);
+
+    if (!fbScreenInit(pScreen, pVBox->base,
+                      pScrn->virtualX, pScrn->virtualY,
+                      pScrn->xDpi, pScrn->yDpi,
+                      pScrn->displayWidth, pScrn->bitsPerPixel))
+        return (FALSE);
+
+    /* Fixup RGB ordering */
+    /** @note the X server uses this even in true colour. */
+    visual = pScreen->visuals + pScreen->numVisuals;
+    while (--visual >= pScreen->visuals) {
+        if ((visual->class | DynamicClass) == DirectColor) {
+            visual->offsetRed   = pScrn->offset.red;
+            visual->offsetGreen = pScrn->offset.green;
+            visual->offsetBlue  = pScrn->offset.blue;
+            visual->redMask     = pScrn->mask.red;
+            visual->greenMask   = pScrn->mask.green;
+            visual->blueMask    = pScrn->mask.blue;
+        }
+    }
+
+    /* must be after RGB ordering fixed */
+    fbPictureInit(pScreen, 0, 0);
+
+    xf86SetBlackWhitePixels(pScreen);
+    pScrn->vtSema = TRUE;
+
+#if defined(VBOXVIDEO_13) && defined(RT_OS_LINUX)
+    vbvxSetUpLinuxACPI(pScreen);
+#endif
+
+    if (!VBoxHGSMIIsSupported())
+    {
+        xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "Graphics device too old to support.\n");
+        return FALSE;
+    }
+    vbvxSetUpHGSMIHeapInGuest(pVBox, pScrn->videoRam * 1024);
+    pVBox->cScreens = VBoxHGSMIGetMonitorCount(&pVBox->guestCtx);
+    pVBox->pScreens = xnfcalloc(pVBox->cScreens, sizeof(*pVBox->pScreens));
+    pVBox->paVBVAModeHints = xnfcalloc(pVBox->cScreens, sizeof(*pVBox->paVBVAModeHints));
+    xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Requested monitor count: %u\n", pVBox->cScreens);
+    vboxEnableVbva(pScrn);
+    /* Set up the dirty rectangle handler.  It will be added into a function
+     * chain and gets removed when the screen is cleaned up. */
+    if (ShadowFBInit2(pScreen, NULL, vbvxHandleDirtyRect) != TRUE)
+        return FALSE;
+    VBoxInitialiseSizeHints(pScrn);
+
+#ifdef VBOXVIDEO_13
+    /* Initialise CRTC and output configuration for use with randr1.2. */
+    xf86CrtcConfigInit(pScrn, &VBOXCrtcConfigFuncs);
+
+    {
+        uint32_t i;
+
+        for (i = 0; i < pVBox->cScreens; ++i)
+        {
+            char szOutput[256];
+
+            /* Setup our virtual CRTCs. */
+            pVBox->pScreens[i].paCrtcs = xf86CrtcCreate(pScrn, &VBOXCrtcFuncs);
+            pVBox->pScreens[i].paCrtcs->driver_private = (void *)(uintptr_t)i;
+
+            /* Set up our virtual outputs. */
+            snprintf(szOutput, sizeof(szOutput), "VGA-%u", i);
+            pVBox->pScreens[i].paOutputs
+                = xf86OutputCreate(pScrn, &VBOXOutputFuncs, szOutput);
+
+            /* We are not interested in the monitor section in the
+             * configuration file. */
+            xf86OutputUseScreenMonitor(pVBox->pScreens[i].paOutputs, FALSE);
+            pVBox->pScreens[i].paOutputs->possible_crtcs = 1 << i;
+            pVBox->pScreens[i].paOutputs->possible_clones = 0;
+            pVBox->pScreens[i].paOutputs->driver_private = (void *)(uintptr_t)i;
+            TRACE_LOG("Created crtc (%p) and output %s (%p)\n",
+                      (void *)pVBox->pScreens[i].paCrtcs, szOutput,
+                      (void *)pVBox->pScreens[i].paOutputs);
+        }
+    }
+
+    /* Set a sane minimum and maximum mode size to match what the hardware
+     * supports. */
+    xf86CrtcSetSizeRange(pScrn, VBOX_VIDEO_MIN_SIZE, VBOX_VIDEO_MIN_SIZE, VBOX_VIDEO_MAX_VIRTUAL, VBOX_VIDEO_MAX_VIRTUAL);
+
+    /* Now create our initial CRTC/output configuration. */
+    if (!xf86InitialConfiguration(pScrn, TRUE)) {
+        xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "Initial CRTC configuration failed!\n");
+        return (FALSE);
+    }
+
+    /* Work around a bug in the original X server modesetting code, which took
+     * the first valid values set to these two as maxima over the server
+     * lifetime.  This bug was introduced on Feb 15 2007 and was fixed in commit
+     * fa877d7f three months later, so it was present in X.Org Server 1.3. */
+    pScrn->virtualX = VBOX_VIDEO_MAX_VIRTUAL;
+    pScrn->virtualY = VBOX_VIDEO_MAX_VIRTUAL;
+
+    /* Initialise randr 1.2 mode-setting functions. */
+    if (!xf86CrtcScreenInit(pScreen)) {
+        return FALSE;
+    }
+
+    /* set first video mode */
+    if (!xf86SetDesiredModes(pScrn)) {
+        return FALSE;
+    }
+#else  /* !VBOXVIDEO_13 */
+    /* set first video mode */
+    setModeRandR11(pScrn, pScrn->currentMode, true, false, 0, 0);
+#endif /* !VBOXVIDEO_13 */
+
+    /* Say that we support graphics. */
+    updateGraphicsCapability(pScrn, TRUE);
+
+#if GET_ABI_MAJOR(ABI_VIDEODRV_VERSION) >= 23
+# define WakeupHandlerProcPtr ServerWakeupHandlerProcPtr
+#endif
+
+    /* Register block and wake-up handlers for getting new screen size hints. */
+    RegisterBlockAndWakeupHandlers(vboxBlockHandler, (WakeupHandlerProcPtr)NoopDDA, (pointer)pScrn);
+
+    /* software cursor */
+    miDCInitialize(pScreen, xf86GetPointerScreenFuncs());
+
+    /* colourmap code */
+    if (!miCreateDefColormap(pScreen))
+        return (FALSE);
+
+    if(!xf86HandleColormaps(pScreen, 256, 8, vboxLoadPalette, NULL, 0))
+        return (FALSE);
+
+    pVBox->CloseScreen = pScreen->CloseScreen;
+    pScreen->CloseScreen = SCRNINDEXAPI(VBOXCloseScreen);
+#ifdef VBOXVIDEO_13
+    pScreen->SaveScreen = xf86SaveScreen;
+#else
+    pScreen->SaveScreen = VBOXSaveScreen;
+#endif
+
+#ifdef VBOXVIDEO_13
+    xf86DPMSInit(pScreen, xf86DPMSSet, 0);
+#else
+    /* We probably do want to support power management - even if we just use
+       a dummy function. */
+    xf86DPMSInit(pScreen, VBOXDisplayPowerManagementSet, 0);
+#endif
+
+    /* Report any unused options (only for the first generation) */
+    if (serverGeneration == 1)
+        xf86ShowUnusedOptions(pScrn->scrnIndex, pScrn->options);
+
+    if (vbvxCursorInit(pScreen) != TRUE)
+        xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
+                   "Unable to start the VirtualBox mouse pointer integration with the host system.\n");
+
+    return (TRUE);
+}
+
+#define NO_VT_ATOM_NAME "VBOXVIDEO_NO_VT"
+
+static Bool VBOXEnterVT(ScrnInfoPtr pScrn)
+{
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+#ifndef VBOXVIDEO_13
+    /* If we got a mode request while we were switched out, temporarily override
+     * the physical mode set to the device while keeping things consistent from
+     * the server's point of view. */
+    int cXOverRide = RT_CLAMP(pVBox->pScreens[0].aPreferredSize.cx, VBOX_VIDEO_MIN_SIZE, VBOX_VIDEO_MAX_VIRTUAL);
+    int cYOverRide = RT_CLAMP(pVBox->pScreens[0].aPreferredSize.cy, VBOX_VIDEO_MIN_SIZE, VBOX_VIDEO_MAX_VIRTUAL);
+#endif
+
+    TRACE_ENTRY();
+    vbvxSetUpHGSMIHeapInGuest(pVBox, pScrn->videoRam * 1024);
+    vboxEnableVbva(pScrn);
+    /* Re-set video mode */
+#ifdef VBOXVIDEO_13
+    if (!xf86SetDesiredModes(pScrn)) {
+        return FALSE;
+    }
+#else
+    setModeRandR11(pScrn, pScrn->currentMode, false, true, cXOverRide, cYOverRide);
+    DeleteProperty(ROOT_WINDOW(pScrn), MakeAtom(NO_VT_ATOM_NAME, sizeof(NO_VT_ATOM_NAME) - 1, TRUE));
+#endif
+    updateGraphicsCapability(pScrn, TRUE);
+    return TRUE;
+}
+
+static void VBOXLeaveVT(ScrnInfoPtr pScrn)
+{
+#ifdef VBOXVIDEO_13
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+    unsigned i;
+#else
+    int32_t propertyValue = 0;
+#endif
+
+    TRACE_ENTRY();
+#ifdef VBOXVIDEO_13
+    for (i = 0; i < pVBox->cScreens; ++i)
+        vbox_crtc_dpms(pVBox->pScreens[i].paCrtcs, DPMSModeOff);
+#else
+    ChangeWindowProperty(ROOT_WINDOW(pScrn), MakeAtom(NO_VT_ATOM_NAME, sizeof(NO_VT_ATOM_NAME) - 1, FALSE), XA_INTEGER, 32,
+                         PropModeReplace, 1, &propertyValue, TRUE);
+#endif
+    updateGraphicsCapability(pScrn, FALSE);
+    vboxDisableVbva(pScrn);
+    vbvxClearVRAM(pScrn, ((size_t)pScrn->virtualX) * pScrn->virtualY * (pScrn->bitsPerPixel / 8), 0);
+    VBOXRestoreMode(pScrn);
+    TRACE_EXIT();
+}
+
+static Bool VBOXCloseScreen(ScreenPtr pScreen)
+{
+    ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+    BOOL ret;
+
+    if (pScrn->vtSema)
+    {
+#ifdef VBOXVIDEO_13
+        unsigned i;
+
+        for (i = 0; i < pVBox->cScreens; ++i)
+            vbox_crtc_dpms(pVBox->pScreens[i].paCrtcs, DPMSModeOff);
+#endif
+        vboxDisableVbva(pScrn);
+        vbvxClearVRAM(pScrn, ((size_t)pScrn->virtualX) * pScrn->virtualY * (pScrn->bitsPerPixel / 8), 0);
+    }
+    if (pScrn->vtSema)
+        VBOXRestoreMode(pScrn);
+    if (pScrn->vtSema)
+        VBOXUnmapVidMem(pScrn);
+    pScrn->vtSema = FALSE;
+
+    vbvxCursorTerm(pVBox);
+
+    pScreen->CloseScreen = pVBox->CloseScreen;
+#if defined(VBOXVIDEO_13) && defined(RT_OS_LINUX)
+    vbvxCleanUpLinuxACPI(pScreen);
+#endif
+#ifndef XF86_SCRN_INTERFACE
+    ret = pScreen->CloseScreen(pScreen->myNum, pScreen);
+#else
+    ret = pScreen->CloseScreen(pScreen);
+#endif
+    return ret;
+}
+
+static Bool VBOXSwitchMode(ScrnInfoPtr pScrn, DisplayModePtr pMode)
+{
+    Bool rc = TRUE;
+
+    TRACE_LOG("HDisplay=%d, VDisplay=%d\n", pMode->HDisplay, pMode->VDisplay);
+#ifdef VBOXVIDEO_13
+    rc = xf86SetSingleMode(pScrn, pMode, RR_Rotate_0);
+#else
+    setModeRandR11(pScrn, pMode, false, false, 0, 0);
+#endif
+    TRACE_LOG("returning %s\n", rc ? "TRUE" : "FALSE");
+    return rc;
+}
+
+static void VBOXAdjustFrame(ScrnInfoPtr pScrn, int x, int y)
+{ RT_NOREF(pScrn, x, y); }
+
+static void VBOXFreeScreen(ScrnInfoPtr pScrn)
+{
+    /* Destroy the VGA hardware record */
+    vgaHWFreeHWRec(pScrn);
+    /* And our private record */
+    free(pScrn->driverPrivate);
+    pScrn->driverPrivate = NULL;
+}
+
+static Bool
+VBOXMapVidMem(ScrnInfoPtr pScrn)
+{
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+    Bool rc = TRUE;
+
+    TRACE_ENTRY();
+    if (!pVBox->base)
+    {
+#ifdef PCIACCESS
+        (void) pci_device_map_range(pVBox->pciInfo,
+                                    pScrn->memPhysBase,
+                                    pScrn->videoRam * 1024,
+                                    PCI_DEV_MAP_FLAG_WRITABLE,
+                                    & pVBox->base);
+#else
+        pVBox->base = xf86MapPciMem(pScrn->scrnIndex,
+                                    VIDMEM_FRAMEBUFFER,
+                                    pVBox->pciTag, pScrn->memPhysBase,
+                                    (unsigned) pScrn->videoRam * 1024);
+#endif
+        if (!pVBox->base)
+            rc = FALSE;
+    }
+    TRACE_LOG("returning %s\n", rc ? "TRUE" : "FALSE");
+    return rc;
+}
+
+static void
+VBOXUnmapVidMem(ScrnInfoPtr pScrn)
+{
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+
+    TRACE_ENTRY();
+    if (pVBox->base == NULL)
+        return;
+
+#ifdef PCIACCESS
+    (void) pci_device_unmap_range(pVBox->pciInfo,
+                                  pVBox->base,
+                                  pScrn->videoRam * 1024);
+#else
+    xf86UnMapVidMem(pScrn->scrnIndex, pVBox->base,
+                    (unsigned) pScrn->videoRam * 1024);
+#endif
+    pVBox->base = NULL;
+    TRACE_EXIT();
+}
+
+#ifndef VBOXVIDEO_13
+static Bool
+VBOXSaveScreen(ScreenPtr pScreen, int mode)
+{
+    RT_NOREF(pScreen, mode);
+    return TRUE;
+}
+#endif
+
+void
+VBOXSaveMode(ScrnInfoPtr pScrn)
+{
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+    vgaRegPtr vgaReg;
+
+    TRACE_ENTRY();
+    vgaReg = &VGAHWPTR(pScrn)->SavedReg;
+    vgaHWSave(pScrn, vgaReg, VGA_SR_ALL);
+    pVBox->fSavedVBEMode = VBoxVideoGetModeRegisters(&pVBox->cSavedWidth,
+                                                     &pVBox->cSavedHeight,
+                                                     &pVBox->cSavedPitch,
+                                                     &pVBox->cSavedBPP,
+                                                     &pVBox->fSavedFlags);
+}
+
+void
+VBOXRestoreMode(ScrnInfoPtr pScrn)
+{
+    VBOXPtr pVBox = VBOXGetRec(pScrn);
+    vgaRegPtr vgaReg;
+
+    TRACE_ENTRY();
+    vgaReg = &VGAHWPTR(pScrn)->SavedReg;
+    vgaHWRestore(pScrn, vgaReg, VGA_SR_ALL);
+    if (pVBox->fSavedVBEMode)
+        VBoxVideoSetModeRegisters(pVBox->cSavedWidth, pVBox->cSavedHeight,
+                                  pVBox->cSavedPitch, pVBox->cSavedBPP,
+                                  pVBox->fSavedFlags, 0, 0);
+    else
+        VBoxVideoDisableVBE();
+}
+
+#ifndef VBOXVIDEO_13
+static void
+VBOXDisplayPowerManagementSet(ScrnInfoPtr pScrn, int mode, int flags)
+{
+    RT_NOREF(pScrn, mode, flags);
+}
+#endif