329 lines
8.4 KiB
C
329 lines
8.4 KiB
C
/*
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* Copyright 1992 by Rich Murphey <Rich@Rice.edu>
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* Copyright 1993 by David Wexelblat <dwex@goblin.org>
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the names of Rich Murphey and David Wexelblat
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* not be used in advertising or publicity pertaining to distribution of
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* the software without specific, written prior permission. Rich Murphey and
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* David Wexelblat make no representations about the suitability of this
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* software for any purpose. It is provided "as is" without express or
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* implied warranty.
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*
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* RICH MURPHEY AND DAVID WEXELBLAT DISCLAIM ALL WARRANTIES WITH REGARD TO
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* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL RICH MURPHEY OR DAVID WEXELBLAT BE LIABLE FOR
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* ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include <X11/X.h>
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#include "xf86.h"
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#include "xf86Priv.h"
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#include <errno.h>
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#include <sys/mman.h>
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#include "xf86_OSlib.h"
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#include "xf86OSpriv.h"
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#if defined(__NetBSD__) && !defined(MAP_FILE)
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#define MAP_FLAGS MAP_SHARED
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#else
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#define MAP_FLAGS (MAP_FILE | MAP_SHARED)
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#endif
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#ifdef __OpenBSD__
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#define SYSCTL_MSG "\tCheck that you have set 'machdep.allowaperture=1'\n"\
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"\tin /etc/sysctl.conf and reboot your machine\n" \
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"\trefer to xf86(4) for details"
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#define SYSCTL_MSG2 \
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"Check that you have set 'machdep.allowaperture=2'\n" \
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"\tin /etc/sysctl.conf and reboot your machine\n" \
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"\trefer to xf86(4) for details"
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#endif
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/***************************************************************************/
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/* Video Memory Mapping section */
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/***************************************************************************/
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static Bool useDevMem = FALSE;
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static int devMemFd = -1;
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#ifdef HAS_APERTURE_DRV
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#define DEV_APERTURE "/dev/xf86"
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#endif
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/*
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* Check if /dev/mem can be mmap'd. If it can't print a warning when
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* "warn" is TRUE.
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*/
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static void
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checkDevMem(Bool warn)
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{
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static Bool devMemChecked = FALSE;
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int fd;
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void *base;
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if (devMemChecked)
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return;
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devMemChecked = TRUE;
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if ((fd = open(DEV_MEM, O_RDWR)) >= 0) {
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/* Try to map a page at the VGA address */
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base = mmap((caddr_t) 0, 4096, PROT_READ | PROT_WRITE,
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MAP_FLAGS, fd, (off_t) 0xA0000);
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if (base != MAP_FAILED) {
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munmap((caddr_t) base, 4096);
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devMemFd = fd;
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useDevMem = TRUE;
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return;
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}
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else {
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/* This should not happen */
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if (warn) {
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xf86Msg(X_WARNING, "checkDevMem: failed to mmap %s (%s)\n",
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DEV_MEM, strerror(errno));
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}
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useDevMem = FALSE;
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return;
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}
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}
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#ifndef HAS_APERTURE_DRV
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if (warn) {
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xf86Msg(X_WARNING, "checkDevMem: failed to open %s (%s)\n",
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DEV_MEM, strerror(errno));
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}
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useDevMem = FALSE;
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return;
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#else
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/* Failed to open /dev/mem, try the aperture driver */
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if ((fd = open(DEV_APERTURE, O_RDWR)) >= 0) {
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/* Try to map a page at the VGA address */
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base = mmap((caddr_t) 0, 4096, PROT_READ | PROT_WRITE,
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MAP_FLAGS, fd, (off_t) 0xA0000);
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if (base != MAP_FAILED) {
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munmap((caddr_t) base, 4096);
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devMemFd = fd;
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useDevMem = TRUE;
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xf86Msg(X_INFO, "checkDevMem: using aperture driver %s\n",
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DEV_APERTURE);
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return;
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}
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else {
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if (warn) {
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xf86Msg(X_WARNING, "checkDevMem: failed to mmap %s (%s)\n",
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DEV_APERTURE, strerror(errno));
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}
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}
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}
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else {
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if (warn) {
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#ifndef __OpenBSD__
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xf86Msg(X_WARNING, "checkDevMem: failed to open %s and %s\n"
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"\t(%s)\n", DEV_MEM, DEV_APERTURE, strerror(errno));
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#else /* __OpenBSD__ */
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xf86Msg(X_WARNING, "checkDevMem: failed to open %s and %s\n"
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"\t(%s)\n%s", DEV_MEM, DEV_APERTURE, strerror(errno),
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SYSCTL_MSG);
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#endif /* __OpenBSD__ */
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}
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}
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useDevMem = FALSE;
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return;
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#endif
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}
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void
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xf86OSInitVidMem(VidMemInfoPtr pVidMem)
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{
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checkDevMem(TRUE);
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pci_system_init_dev_mem(devMemFd);
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pVidMem->initialised = TRUE;
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}
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#ifdef USE_I386_IOPL
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/***************************************************************************/
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/* I/O Permissions section */
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/***************************************************************************/
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static Bool ExtendedEnabled = FALSE;
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Bool
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xf86EnableIO()
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{
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if (ExtendedEnabled)
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return TRUE;
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if (i386_iopl(TRUE) < 0) {
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#ifndef __OpenBSD__
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xf86Msg(X_WARNING, "%s: Failed to set IOPL for extended I/O",
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"xf86EnableIO");
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#else
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xf86Msg(X_WARNING, "%s: Failed to set IOPL for extended I/O\n%s",
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"xf86EnableIO", SYSCTL_MSG);
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#endif
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return FALSE;
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}
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ExtendedEnabled = TRUE;
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return TRUE;
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}
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void
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xf86DisableIO()
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{
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if (!ExtendedEnabled)
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return;
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i386_iopl(FALSE);
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ExtendedEnabled = FALSE;
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return;
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}
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#endif /* USE_I386_IOPL */
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#ifdef USE_AMD64_IOPL
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/***************************************************************************/
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/* I/O Permissions section */
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/***************************************************************************/
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static Bool ExtendedEnabled = FALSE;
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Bool
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xf86EnableIO()
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{
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if (ExtendedEnabled)
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return TRUE;
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if (amd64_iopl(TRUE) < 0) {
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#ifndef __OpenBSD__
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xf86Msg(X_WARNING, "%s: Failed to set IOPL for extended I/O",
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"xf86EnableIO");
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#else
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xf86Msg(X_WARNING, "%s: Failed to set IOPL for extended I/O\n%s",
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"xf86EnableIO", SYSCTL_MSG);
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#endif
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return FALSE;
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}
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ExtendedEnabled = TRUE;
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return TRUE;
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}
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void
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xf86DisableIO()
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{
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if (!ExtendedEnabled)
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return;
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if (amd64_iopl(FALSE) == 0) {
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ExtendedEnabled = FALSE;
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}
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/* Otherwise, the X server has revoqued its root uid,
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and thus cannot give up IO privileges any more */
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return;
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}
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#endif /* USE_AMD64_IOPL */
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#ifdef USE_DEV_IO
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static int IoFd = -1;
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Bool
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xf86EnableIO()
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{
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if (IoFd >= 0)
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return TRUE;
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if ((IoFd = open("/dev/io", O_RDWR)) == -1) {
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xf86Msg(X_WARNING, "xf86EnableIO: "
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"Failed to open /dev/io for extended I/O");
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return FALSE;
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}
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return TRUE;
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}
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void
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xf86DisableIO()
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{
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if (IoFd < 0)
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return;
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close(IoFd);
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IoFd = -1;
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return;
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}
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#endif
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#ifdef __NetBSD__
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/***************************************************************************/
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/* Set TV output mode */
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/***************************************************************************/
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void
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xf86SetTVOut(int mode)
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{
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switch (xf86Info.consType) {
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#ifdef PCCONS_SUPPORT
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case PCCONS:{
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if (ioctl(xf86Info.consoleFd, CONSOLE_X_TV_ON, &mode) < 0) {
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xf86Msg(X_WARNING,
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"xf86SetTVOut: Could not set console to TV output, %s\n",
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strerror(errno));
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}
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}
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break;
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#endif /* PCCONS_SUPPORT */
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default:
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FatalError("Xf86SetTVOut: Unsupported console");
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break;
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}
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return;
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}
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void
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xf86SetRGBOut()
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{
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switch (xf86Info.consType) {
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#ifdef PCCONS_SUPPORT
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case PCCONS:{
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if (ioctl(xf86Info.consoleFd, CONSOLE_X_TV_OFF, 0) < 0) {
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xf86Msg(X_WARNING,
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"xf86SetTVOut: Could not set console to RGB output, %s\n",
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strerror(errno));
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}
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}
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break;
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#endif /* PCCONS_SUPPORT */
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default:
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FatalError("Xf86SetTVOut: Unsupported console");
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break;
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}
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return;
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}
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#endif
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