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/* $Id: getmode.c $ */
/** @file
* VirtualBox X11 Additions graphics driver dynamic video mode functions.
*/
/*
* Copyright (C) 2006-2022 Oracle and/or its affiliates.
*
* 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
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS 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.
*/
#include "vboxvideo.h"
#define NEED_XF86_TYPES
#include "xf86.h"
#ifdef XORG_7X
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
#endif
#ifdef VBOXVIDEO_13
# ifdef RT_OS_LINUX
# include <linux/input.h>
# ifndef EVIOCGRAB
# define EVIOCGRAB _IOW('E', 0x90, int)
# endif
# ifndef KEY_SWITCHVIDEOMODE
# define KEY_SWITCHVIDEOMODE 227
# endif
# include <dirent.h>
# include <errno.h>
# include <fcntl.h>
# include <unistd.h>
# endif /* RT_OS_LINUX */
#endif /* VBOXVIDEO_13 */
/**************************************************************************
* Main functions *
**************************************************************************/
/**
* Fills a display mode M with a built-in mode of name pszName and dimensions
* cx and cy.
*/
static void vboxFillDisplayMode(ScrnInfoPtr pScrn, DisplayModePtr m,
const char *pszName, unsigned cx, unsigned cy)
{
VBOXPtr pVBox = pScrn->driverPrivate;
char szName[256];
DisplayModePtr pPrev = m->prev;
DisplayModePtr pNext = m->next;
if (!pszName)
{
sprintf(szName, "%ux%u", cx, cy);
pszName = szName;
}
TRACE_LOG("pszName=%s, cx=%u, cy=%u\n", pszName, cx, cy);
if (m->name)
free((void*)m->name);
memset(m, '\0', sizeof(*m));
m->prev = pPrev;
m->next = pNext;
m->status = MODE_OK;
m->type = M_T_BUILTIN;
/* Older versions of VBox only support screen widths which are a multiple
* of 8 */
if (pVBox->fAnyX)
m->HDisplay = cx;
else
m->HDisplay = cx & ~7;
m->HSyncStart = m->HDisplay + 2;
m->HSyncEnd = m->HDisplay + 4;
m->HTotal = m->HDisplay + 6;
m->VDisplay = cy;
m->VSyncStart = m->VDisplay + 2;
m->VSyncEnd = m->VDisplay + 4;
m->VTotal = m->VDisplay + 6;
m->Clock = m->HTotal * m->VTotal * 60 / 1000; /* kHz */
m->name = xnfstrdup(pszName);
}
/**
* Allocates an empty display mode and links it into the doubly linked list of
* modes pointed to by pScrn->modes. Returns a pointer to the newly allocated
* memory.
*/
static DisplayModePtr vboxAddEmptyScreenMode(ScrnInfoPtr pScrn)
{
DisplayModePtr pMode = xnfcalloc(sizeof(DisplayModeRec), 1);
TRACE_ENTRY();
if (!pScrn->modes)
{
pScrn->modes = pMode;
pMode->next = pMode;
pMode->prev = pMode;
}
else
{
pMode->next = pScrn->modes;
pMode->prev = pScrn->modes->prev;
pMode->next->prev = pMode;
pMode->prev->next = pMode;
}
return pMode;
}
/**
* Create display mode entries in the screen information structure for each
* of the graphics modes that we wish to support, that is:
* - A dynamic mode in first place which will be updated by the RandR code.
* - Any modes that the user requested in xorg.conf/XFree86Config.
*/
void vboxAddModes(ScrnInfoPtr pScrn)
{
unsigned cx = 0;
unsigned cy = 0;
unsigned i;
DisplayModePtr pMode;
/* Add two dynamic mode entries. When we receive a new size hint we will
* update whichever of these is not current. */
pMode = vboxAddEmptyScreenMode(pScrn);
vboxFillDisplayMode(pScrn, pMode, NULL, 800, 600);
pMode = vboxAddEmptyScreenMode(pScrn);
vboxFillDisplayMode(pScrn, pMode, NULL, 800, 600);
/* Add any modes specified by the user. We assume here that the mode names
* reflect the mode sizes. */
for (i = 0; pScrn->display->modes && pScrn->display->modes[i]; i++)
{
if (sscanf(pScrn->display->modes[i], "%ux%u", &cx, &cy) == 2)
{
pMode = vboxAddEmptyScreenMode(pScrn);
vboxFillDisplayMode(pScrn, pMode, pScrn->display->modes[i], cx, cy);
}
}
}
/** Set the initial values for the guest screen size hints to standard values
* in case nothing else is available. */
void VBoxInitialiseSizeHints(ScrnInfoPtr pScrn)
{
VBOXPtr pVBox = VBOXGetRec(pScrn);
unsigned i;
for (i = 0; i < pVBox->cScreens; ++i)
{
pVBox->pScreens[i].aPreferredSize.cx = 800;
pVBox->pScreens[i].aPreferredSize.cy = 600;
pVBox->pScreens[i].afConnected = true;
}
/* Set up the first mode correctly to match the requested initial mode. */
pScrn->modes->HDisplay = pVBox->pScreens[0].aPreferredSize.cx;
pScrn->modes->VDisplay = pVBox->pScreens[0].aPreferredSize.cy;
}
static Bool useHardwareCursor(uint32_t fCursorCapabilities)
{
if (fCursorCapabilities & VBOX_VBVA_CURSOR_CAPABILITY_HARDWARE)
return true;
return false;
}
static void compareAndMaybeSetUseHardwareCursor(VBOXPtr pVBox, uint32_t fCursorCapabilities, Bool *pfChanged, Bool fSet)
{
if (pVBox->fUseHardwareCursor != useHardwareCursor(fCursorCapabilities))
*pfChanged = true;
if (fSet)
pVBox->fUseHardwareCursor = useHardwareCursor(fCursorCapabilities);
}
#define COMPARE_AND_MAYBE_SET(pDest, src, pfChanged, fSet) \
do { \
if (*(pDest) != (src)) \
{ \
if (fSet) \
*(pDest) = (src); \
*(pfChanged) = true; \
} \
} while(0)
/** Read in information about the most recent size hints and cursor
* capabilities requested for the guest screens from HGSMI. */
void vbvxReadSizesAndCursorIntegrationFromHGSMI(ScrnInfoPtr pScrn, Bool *pfNeedUpdate)
{
VBOXPtr pVBox = VBOXGetRec(pScrn);
int rc;
unsigned i;
Bool fChanged = false;
uint32_t fCursorCapabilities;
if (!pVBox->fHaveHGSMIModeHints)
return;
rc = VBoxHGSMIGetModeHints(&pVBox->guestCtx, pVBox->cScreens, pVBox->paVBVAModeHints);
AssertMsg(rc == VINF_SUCCESS, ("VBoxHGSMIGetModeHints failed, rc=%d.\n", rc));
for (i = 0; i < pVBox->cScreens; ++i)
if (pVBox->paVBVAModeHints[i].magic == VBVAMODEHINT_MAGIC)
{
COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].aPreferredSize.cx, pVBox->paVBVAModeHints[i].cx & 0x8fff, &fChanged, true);
COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].aPreferredSize.cy, pVBox->paVBVAModeHints[i].cy & 0x8fff, &fChanged, true);
COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].afConnected, RT_BOOL(pVBox->paVBVAModeHints[i].fEnabled), &fChanged, true);
COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].aPreferredLocation.x, (int32_t)pVBox->paVBVAModeHints[i].dx & 0x8fff, &fChanged,
true);
COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].aPreferredLocation.y, (int32_t)pVBox->paVBVAModeHints[i].dy & 0x8fff, &fChanged,
true);
if (pVBox->paVBVAModeHints[i].dx != ~(uint32_t)0 && pVBox->paVBVAModeHints[i].dy != ~(uint32_t)0)
COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].afHaveLocation, true, &fChanged, true);
else
COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].afHaveLocation, false, &fChanged, true);
}
rc = VBoxQueryConfHGSMI(&pVBox->guestCtx, VBOX_VBVA_CONF32_CURSOR_CAPABILITIES, &fCursorCapabilities);
AssertMsg(rc == VINF_SUCCESS, ("Getting VBOX_VBVA_CONF32_CURSOR_CAPABILITIES failed, rc=%d.\n", rc));
compareAndMaybeSetUseHardwareCursor(pVBox, fCursorCapabilities, &fChanged, true);
if (pfNeedUpdate != NULL && fChanged)
*pfNeedUpdate = true;
}
#undef COMPARE_AND_MAYBE_SET
#ifdef VBOXVIDEO_13
# ifdef RT_OS_LINUX
/** We have this for two purposes: one is to ensure that the X server is woken
* up when we get a video ACPI event. Two is to grab ACPI video events to
* prevent gnome-settings-daemon from seeing them, as older versions ignored
* the time stamp and handled them at the wrong time. */
static void acpiEventHandler(int fd, void *pvData)
{
struct input_event event;
ssize_t rc;
RT_NOREF(pvData);
do
rc = read(fd, &event, sizeof(event));
while (rc > 0 || (rc == -1 && errno == EINTR));
/* Why do they return EAGAIN instead of zero bytes read like everyone else does? */
AssertMsg(rc != -1 || errno == EAGAIN, ("Reading ACPI input event failed.\n"));
}
void vbvxSetUpLinuxACPI(ScreenPtr pScreen)
{
static const char s_szDevInput[] = "/dev/input/";
struct dirent *pDirent;
char szFile[sizeof(s_szDevInput) + sizeof(pDirent->d_name) + 16];
VBOXPtr pVBox = VBOXGetRec(xf86Screens[pScreen->myNum]);
DIR *pDir;
int fd = -1;
if (pVBox->fdACPIDevices != -1 || pVBox->hACPIEventHandler != NULL)
FatalError("ACPI input file descriptor not initialised correctly.\n");
pDir = opendir("/dev/input");
if (pDir == NULL)
return;
memcpy(szFile, s_szDevInput, sizeof(s_szDevInput));
for (pDirent = readdir(pDir); pDirent != NULL; pDirent = readdir(pDir))
{
if (strncmp(pDirent->d_name, "event", sizeof("event") - 1) == 0)
{
#define BITS_PER_BLOCK (sizeof(unsigned long) * 8)
char szDevice[64] = "";
unsigned long afKeys[KEY_MAX / BITS_PER_BLOCK];
size_t const cchName = strlen(pDirent->d_name);
if (cchName + sizeof(s_szDevInput) > sizeof(szFile))
continue;
memcpy(&szFile[sizeof(s_szDevInput) - 1], pDirent->d_name, cchName + 1);
if (fd != -1)
close(fd);
fd = open(szFile, O_RDONLY | O_NONBLOCK);
if ( fd == -1
|| ioctl(fd, EVIOCGNAME(sizeof(szDevice)), szDevice) == -1
|| strcmp(szDevice, "Video Bus") != 0)
continue;
if ( ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(afKeys)), afKeys) == -1
|| (( afKeys[KEY_SWITCHVIDEOMODE / BITS_PER_BLOCK]
>> KEY_SWITCHVIDEOMODE % BITS_PER_BLOCK) & 1) == 0)
break;
if (ioctl(fd, EVIOCGRAB, (void *)1) != 0)
break;
pVBox->hACPIEventHandler
= xf86AddGeneralHandler(fd, acpiEventHandler, pScreen);
if (pVBox->hACPIEventHandler == NULL)
break;
pVBox->fdACPIDevices = fd;
fd = -1;
break;
#undef BITS_PER_BLOCK
}
}
if (fd != -1)
close(fd);
closedir(pDir);
}
void vbvxCleanUpLinuxACPI(ScreenPtr pScreen)
{
VBOXPtr pVBox = VBOXGetRec(xf86Screens[pScreen->myNum]);
if (pVBox->fdACPIDevices != -1)
close(pVBox->fdACPIDevices);
pVBox->fdACPIDevices = -1;
xf86RemoveGeneralHandler(pVBox->hACPIEventHandler);
pVBox->hACPIEventHandler = NULL;
}
# endif /* RT_OS_LINUX */
#endif /* VBOXVIDEO_13 */
|