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xserver/hw/xfree86/os-support/bsd/i386_video.c

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/*
* Copyright 1992 by Rich Murphey <Rich@Rice.edu>
* Copyright 1993 by David Wexelblat <dwex@goblin.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the names of Rich Murphey and David Wexelblat
* not be used in advertising or publicity pertaining to distribution of
* the software without specific, written prior permission. Rich Murphey and
* David Wexelblat make no representations about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* RICH MURPHEY AND DAVID WEXELBLAT DISCLAIM ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL RICH MURPHEY OR DAVID WEXELBLAT BE LIABLE FOR
* ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <errno.h>
#include <sys/mman.h>
#include <X11/X.h>
#include "xf86.h"
#include "xf86_os_support.h"
#include "xf86Priv.h"
#include "xf86_OSlib.h"
#if defined(USE_I386_IOPL) || defined(USE_AMD64_IOPL)
#include <machine/sysarch.h>
#endif
#include "xf86_bsd_priv.h"
#ifndef CONSOLE_X_TV_ON
#define CONSOLE_X_TV_ON _IOW('t',155,int)
#endif
#ifndef CONSOLE_X_TV_OFF
#define CONSOLE_X_TV_OFF _IO('t',156)
#endif
#ifdef __OpenBSD__
#define SYSCTL_MSG "\tCheck that you have set 'machdep.allowaperture=1'\n"\
"\tin /etc/sysctl.conf and reboot your machine\n" \
"\trefer to xf86(4) for details"
#define SYSCTL_MSG2 \
"Check that you have set 'machdep.allowaperture=2'\n" \
"\tin /etc/sysctl.conf and reboot your machine\n" \
"\trefer to xf86(4) for details"
#endif
/***************************************************************************/
/* Video Memory Mapping section */
/***************************************************************************/
static Bool useDevMem = FALSE;
static int devMemFd = -1;
/*
* Check if /dev/mem can be mmap'd. If it can't print a warning when
* "warn" is TRUE.
*/
static void
checkDevMem(Bool warn)
{
static Bool devMemChecked = FALSE;
int fd;
void *base;
if (devMemChecked)
return;
devMemChecked = TRUE;
if ((fd = open(DEV_MEM, O_RDWR)) >= 0) {
/* Try to map a page at the VGA address */
base = mmap((caddr_t) 0, 4096, PROT_READ | PROT_WRITE,
MAP_FLAGS, fd, (off_t) 0xA0000);
if (base != MAP_FAILED) {
munmap((caddr_t) base, 4096);
devMemFd = fd;
useDevMem = TRUE;
return;
}
else {
/* This should not happen */
if (warn) {
LogMessageVerb(X_WARNING, 1, "checkDevMem: failed to mmap %s (%s)\n",
DEV_MEM, strerror(errno));
}
useDevMem = FALSE;
return;
}
}
#ifndef HAS_APERTURE_DRV
if (warn) {
LogMessageVerb(X_WARNING, 1, "checkDevMem: failed to open %s (%s)\n",
DEV_MEM, strerror(errno));
}
useDevMem = FALSE;
return;
#else
/* Failed to open /dev/mem, try the aperture driver */
if ((fd = open(DEV_APERTURE, O_RDWR)) >= 0) {
/* Try to map a page at the VGA address */
base = mmap((caddr_t) 0, 4096, PROT_READ | PROT_WRITE,
MAP_FLAGS, fd, (off_t) 0xA0000);
if (base != MAP_FAILED) {
munmap((caddr_t) base, 4096);
devMemFd = fd;
useDevMem = TRUE;
LogMessageVerb(X_INFO, 1, "checkDevMem: using aperture driver %s\n",
DEV_APERTURE);
return;
}
else {
if (warn) {
LogMessageVerb(X_WARNING, 1, "checkDevMem: failed to mmap %s (%s)\n",
DEV_APERTURE, strerror(errno));
}
}
}
else {
if (warn) {
#ifndef __OpenBSD__
LogMessageVerb(X_WARNING, 1, "checkDevMem: failed to open %s and %s\n"
"\t(%s)\n", DEV_MEM, DEV_APERTURE, strerror(errno));
#else /* __OpenBSD__ */
LogMessageVerb(X_WARNING, 1, "checkDevMem: failed to open %s and %s\n"
"\t(%s)\n%s", DEV_MEM, DEV_APERTURE, strerror(errno),
SYSCTL_MSG);
#endif /* __OpenBSD__ */
}
}
useDevMem = FALSE;
return;
#endif
}
void
xf86OSInitVidMem(VidMemInfoPtr pVidMem)
{
checkDevMem(TRUE);
pci_system_init_dev_mem(devMemFd);
pVidMem->initialised = TRUE;
}
#ifdef USE_I386_IOPL
/***************************************************************************/
/* I/O Permissions section */
/***************************************************************************/
static Bool ExtendedEnabled = FALSE;
Bool
xf86EnableIO(void)
{
if (ExtendedEnabled)
return TRUE;
if (i386_iopl(TRUE) < 0) {
#ifndef __OpenBSD__
LogMessageVerb(X_WARNING, 1, "xf86EnableIO: Failed to set IOPL for extended I/O");
#else
LogMessageVerb(X_WARNING, 1, "xf86EnableIO: Failed to set IOPL for extended I/O\n%s", SYSCTL_MSG);
#endif
return FALSE;
}
ExtendedEnabled = TRUE;
return TRUE;
}
void
xf86DisableIO(void)
{
if (!ExtendedEnabled)
return;
i386_iopl(FALSE);
ExtendedEnabled = FALSE;
return;
}
#endif /* USE_I386_IOPL */
#ifdef USE_AMD64_IOPL
#ifdef __NetBSD__
#define amd64_iopl(x) x86_64_iopl(x)
#endif
/***************************************************************************/
/* I/O Permissions section */
/***************************************************************************/
static Bool ExtendedEnabled = FALSE;
Bool
xf86EnableIO(void)
{
if (ExtendedEnabled)
return TRUE;
if (amd64_iopl(TRUE) < 0) {
#ifndef __OpenBSD__
LogMessageVerb(X_WARNING, 1, "xf86EnableIO: Failed to set IOPL for extended I/O");
#else
LogMessageVerb(X_WARNING, 1, "xf86EnableIO: Failed to set IOPL for extended I/O\n%s", SYSCTL_MSG);
#endif
return FALSE;
}
ExtendedEnabled = TRUE;
return TRUE;
}
void
xf86DisableIO(void)
{
if (!ExtendedEnabled)
return;
if (amd64_iopl(FALSE) == 0) {
ExtendedEnabled = FALSE;
}
/* Otherwise, the X server has revoqued its root uid,
and thus cannot give up IO privileges any more */
return;
}
#endif /* USE_AMD64_IOPL */
#ifdef USE_DEV_IO
static int IoFd = -1;
Bool
xf86EnableIO(void)
{
if (IoFd >= 0)
return TRUE;
if ((IoFd = open("/dev/io", O_RDWR)) == -1) {
LogMessageVerb(X_WARNING, 1, "xf86EnableIO: Failed to open /dev/io for extended I/O");
return FALSE;
}
return TRUE;
}
void
xf86DisableIO(void)
{
if (IoFd < 0)
return;
close(IoFd);
IoFd = -1;
return;
}
#endif
#ifdef __NetBSD__
/***************************************************************************/
/* Set TV output mode */
/***************************************************************************/
void
xf86SetTVOut(int mode)
{
switch (xf86Info.consType) {
#ifdef PCCONS_SUPPORT
case PCCONS:{
if (ioctl(xf86Info.consoleFd, CONSOLE_X_TV_ON, &mode) < 0) {
LogMessageVerb(X_WARNING, 1,
"xf86SetTVOut: Could not set console to TV output, %s\n",
strerror(errno));
}
}
break;
#endif /* PCCONS_SUPPORT */
default:
FatalError("Xf86SetTVOut: Unsupported console");
break;
}
return;
}
void
xf86SetRGBOut(void)
{
switch (xf86Info.consType) {
#ifdef PCCONS_SUPPORT
case PCCONS:{
if (ioctl(xf86Info.consoleFd, CONSOLE_X_TV_OFF, 0) < 0) {
LogMessageVerb(X_WARNING, 1,
"xf86SetTVOut: Could not set console to RGB output, %s\n",
strerror(errno));
}
}
break;
#endif /* PCCONS_SUPPORT */
default:
FatalError("Xf86SetTVOut: Unsupported console");
break;
}
return;
}
#endif
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