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/*
* Copyright 2001 by J. Kean Johnston <jkj@sco.com>
*
* 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 name J. Kean Johnston not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. J. Kean Johnston makes no
* representations about the suitability of this software for any purpose.
* It is provided "as is" without express or implied warranty.
*
* J. KEAN JOHNSTON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL J. KEAN JOHNSTON 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.
*/
/* Re-written May 2001 to represent the current state of reality */
/*
* This file contains the completely re-written SCO OpenServer video
* routines for XFree86 4.x. Much of this is based on the SCO X server
* code (which is an X11R5 server) and will probably only work on
* OpenServer versions 5.0.5, 5.0.6 and later. Please send me (jkj@sco.com)
* email if you have any questions.
*
* Ideally, you should use OSR5.0.6A or later, with the updated console
* driver for 5.0.6A (its the default driver in 5.0.7 and later).
* However, if you are running on an older system, this code will detect
* that and adjust accordingly.
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <X11/X.h>
#include "input.h"
#include "scrnintstr.h"
#define _NEED_SYSI86
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86OSpriv.h"
#include "xf86_OSlib.h"
#include <sys/ci/ciioctl.h>
#define MPXNAME "/dev/atp1"
#define BASECPU 1
Bool mpxLock = TRUE;
#define USE_VASMETHOD 1
/***************************************************************************/
/* Video Memory Mapping section */
/***************************************************************************/
static int sco_mcdone = 0, sco_ismc = 0;
/***************************************************************************/
/*
* To map the video memory, we first need to see if we are on a multi-console
* system. If we are, we need to try to use an existing video class in the
* kernel. We do this by retrieving the list of currently defined classes
* (via the new CONS_GETCLASS ioctl()) to see if we have a class that will
* match the range of memory we desire. If we can't find one, we have an
* error and we abort.
*
* If we are not using a multi-console, we can simply use mmap() to map in
* the frame buffer, using the classs-access method as a fall-back only if
* the mmap() fails (it shouldn't). We always set the appropriate pointers
* in the config structure to point ot the right function to map and unmap
* the video memory. An alternative to using mmap() is to use the new
* CONS_ADDVAS call, which will use vasmalloc() and vasbind() in the kernel
* to map the physical address to a virtual one, which it then returns.
* I am not 100% sure if this is faster or not, but it may prove easier to
* debug things. Just to be on the safe side, I have included both methods
* here, and the mmap() method can be used by setting USE_VASMETHOD to 0
* above.
*/
#if !defined(CONS_ADDVAS)
# undef USE_VASMETHOD
# define USE_VASMETHOD 0
#endif
static int
scoIsMultiConsole (void)
{
int x;
if (sco_mcdone)
return sco_ismc;
x = access ("/usr/lib/vidconf/.multiconsole", F_OK);
if (x == 0)
sco_ismc = 1;
sco_mcdone = 1;
return sco_ismc;
}
/*
* This maps memory using mmap()
*/
static pointer
mapVidMemMMAP(int ScreenNum, unsigned long Base, unsigned long Size, int flags)
{
int fd;
unsigned long realBase, alignOff;
pointer base;
fd = open (DEV_MEM, (flags & VIDMEM_READONLY) ? O_RDONLY : O_RDWR);
if (fd < 0) {
FatalError("xf86MapVidMem: failed to open %s (%s)\n", DEV_MEM,
strerror(errno));
return 0; /* NOTREACHED */
}
realBase = Base & ~(getpagesize() - 1);
alignOff = Base - realBase;
DebugF("base: %lx, realBase: %lx, alignOff: %lx\n", Base,realBase,alignOff);
base = mmap((caddr_t)0, Size + alignOff,
(flags & VIDMEM_READONLY) ? PROT_READ : (PROT_READ | PROT_WRITE),
MAP_SHARED, fd, (off_t)realBase);
close(fd);
if (base == MAP_FAILED) {
FatalError("xf86MapVidMem: Could not mmap framebuffer (0x%08x,0x%x) (%s)\n",
Base, Size, strerror(errno));
return 0; /* NOTREACHED */
}
DebugF("base: %lx aligned base: %lx\n",base, base + alignOff);
return (pointer)((char *)base + alignOff);
}
#if (USE_VASMETHOD)
/*
* This maps memory using the virtual address space (VAS) console calls.
*/
static pointer
mapVidMemVAS(int ScreenNum, unsigned long Base, unsigned long Size, int flags)
{
struct vidvasmem vas;
pointer base;
vas.base = (long)Base;
vas.size = (long)Size;
base = (pointer)ioctl (xf86Info.consoleFd, CONS_ADDVAS, &vas);
if (base == (pointer)-1) {
return mapVidMemMMAP(ScreenNum, Base, Size, flags);
}
return base;
}
#endif /* USE_VASMETHOD */
struct vidclass vidclasslist[] = {
{ "VBE", "", 0xf0000000, 0x2000000, 0 },
{ "P9000", "", 0xc0000000, 0x400000, 0 },
{ "TULIP", "", 0x80000000, 0x400000, 0 },
{ "VIPER", "", 0xa0000000, 0x400000, 0 },
{ "S3T", "", 0xa0000000, 0x200000, 0 },
{ "S3DT", "", 0x4000000, 0x400000, 0 },
{ "MGA", "", 0x2200000, 0x4000, 0 },
{ "CLVGA", "", 0xa0000, 0x20000, 0 },
{ "OLIVE", "", 0xd8000000, 0x400000, 0 },
{ "S3C", "", 0xa0000, 0x10000, 0 },
{ "MGAVLB", "", 0xac000, 0x34000, 0 },
{ "ATI8514", "", 0xFF000, 0x1000, 0 },
{ "GXREGS", "", 0xb0000, 0x10000, 0 },
{ "GX", "", 0xa0000, 0x10000, 0 },
{ "CT64300", "", 0xa0000000, 0x400000, 0 },
{ "SVGA", "", 0xa0000, 0x20000, 0 },
{ "S3V", "", 0xa0000000, 0x400000, 0 },
{ "8514A", "", 0xFF000, 0x1000, 0 },
{ "VGA", "", 0xa0000, 0x10000, 0 },
{ 0 }
};
static pointer
mapVidMemVC(int ScreenNum, unsigned long Base, unsigned long Size, int flags)
{
struct vidclass *vcp;
char *class = NULL;
pointer base;
for (vcp = vidclasslist; vcp->name; vcp++) {
if ((vcp->base == Base) && (vcp->size == Size)) {
class = vcp->name;
break;
}
}
if (class == NULL) {
/*
* As a fall-back, we will try and use the mmap() approach. This may
* prove to be the wrong thing to do, but time and testing will tell.
*/
ErrorF("xf86MapVidMem: No class map defined for (0x%08x,0x%08x)\n", Base, Size);
#if USE_VASMETHOD
return mapVidMemVAS(ScreenNum, Base, Size, flags);
#else /* !USE_VASMETHOD */
return mapVidMemMMAP(ScreenNum, Base, Size, flags);
#endif
}
/*
* We found a suitable class. Try and use it.
*/
base = (pointer)ioctl(xf86Info.consoleFd, MAP_CLASS, class);
if ((int)base == -1) {
FatalError("xf86MapVidMem: Failed to map video memory class `%s'\n", class);
return 0; /* NOTREACHED */
}
return base;
}
/*
* Unmapping the video memory is easy. We always call munmap(), as it is
* safe to do so even if we haven't actually mapped in any pages via mmap().
* In the case where we used the video class, we don't need to do anything
* as the kernel will clean up the TSS when we exit, and will undo the
* vasbind() that was done when the class was originally mapped. If we used
* vasmap, we simply undo the map. Again, it is benign to call vasunmap
* even if we got the frame buffer via some other mechanism (like mmap).
*/
static void
unmapVidMem(int ScreenNum, pointer Base, unsigned long Size)
{
#if USE_VASMETHOD
struct vidvasmem vas;
int x;
vas.base = (long)Base;
vas.size = (long)Size;
x = ioctl (xf86Info.consoleFd, CONS_DELVAS, &vas);
if (x == 0)
return;
#endif /* USE_VASMETHOD */
munmap(Base, Size);
}
/*
* Set things up to point to our local functions. When the kernel gets
* MTRR support, we will need to add the required functions for that
* here too. MTRR support will most likely appear in 5.0.8 or 5.1.0.
*
* We also want to lock the X server process to the base CPU in an MPX
* system, since we will be going to IOPL 3. Most engine drivers can cope
* with I/O access on any CPU but there are a few (AST Manhattan I believe)
* that can't, so the server needs to be locked to CPU0.
*/
void
xf86OSInitVidMem(VidMemInfoPtr pVidMem)
{
int mpx_fd;
if (scoIsMultiConsole ()) {
pVidMem->mapMem = mapVidMemVC;
} else {
#if USE_VASMETHOD
pVidMem->mapMem = mapVidMemVAS;
#else
pVidMem->mapMem = mapVidMemMMAP;
#endif
}
pVidMem->unmapMem = unmapVidMem;
pVidMem->linearSupported = TRUE;
pVidMem->initialised = TRUE;
if (mpxLock && (mpx_fd = open (MPXNAME, O_RDONLY)) > 0) {
if (ioctl (mpx_fd, ACPU_XLOCK, BASECPU) < 0)
ErrorF ("xf86OSInitVidMem: Can not bind to CPU 0 (%s)\n",
strerror(errno));
close (mpx_fd);
}
}
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