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xserver/hw/xfree86/os-support/lynxos/lynx_video.c

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/*
* Copyright 1993 by Thomas Mueller
*
* 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 of Thomas Mueller not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Thomas Mueller makes no representations
* about the suitability of this software for any purpose. It is provided
* "as is" without express or implied warranty.
*
* THOMAS MUELLER DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THOMAS MUELLER 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.
*
*/
/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/lynxos/lynx_video.c,v 3.17 2000/10/28 01:42:27 mvojkovi Exp $ */
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <X11/X.h>
#include "input.h"
#include "scrnintstr.h"
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86_OSlib.h"
#include "xf86OSpriv.h"
#if defined(__powerpc__)
# if defined(USE_MACHINE_ABSOLUTE)
# include <machine/absolute.h>
# else
# define __USER_SPACE_INCLUDE
# include <hw_absolute.h>
# endif
void ppcPciIoMap(int bus);
#endif
#if 0
#define DEBUG
#endif
#ifdef HAS_MTRR_SUPPORT
#include <sys/memrange.h>
#define X_MTRR_ID "XFree86"
static pointer setWC(int, unsigned long, unsigned long, Bool, MessageType);
static void undoWC(int, pointer);
static Bool cleanMTRR(void);
static int devMemFd = -1;
#define MTRR_DEVICE "/dev/mtrr"
#endif
#if !defined(NO_MMAP)
#include <sys/mman.h>
int smem_remove(char *name)
{
return(0);
}
char *smem_create(char *name, char *arg_addr, long size, int mode)
{
int fd;
void *addr = 0;
char *retval;
size_t len = size;
int prot = PROT_READ|PROT_WRITE|PROT_UNCACHE;
int flags = MAP_SHARED;
off_t off = (off_t)arg_addr;
if ((fd = open("/dev/mem" , O_RDWR)) < 0)
{
retval = (char *)-1;
}
else
{
if (mode == SM_DETACH)
{
munmap(arg_addr, len);
retval = 0;
}
else
{
if ((retval = mmap (addr, len, prot, flags, fd, off) ) == MAP_FAILED)
{
retval = (char *)-1;
}
}
close(fd);
}
return(retval);
}
#endif
/***************************************************************************/
/* Video Memory Mapping section */
/***************************************************************************/
typedef struct
{
char name[16];
unsigned long Base;
unsigned long Size;
char *ptr;
int RefCnt;
}
_SMEMS;
#define MAX_SMEMS 16
static _SMEMS smems[MAX_SMEMS];
#ifndef MAP_FAILED
#define MAP_FAILED ((void *)-1)
#endif
static void
smemCleanup(void)
{
int i;
for (i = 0; i < MAX_SMEMS; i++) {
if (*smems[i].name && smems[i].ptr) {
(void)smem_create(NULL, smems[i].ptr, 0, SM_DETACH);
(void)smem_remove(smems[i].name);
*smems[i].name = '\0';
smems[i].ptr = NULL;
smems[i].Base = 0;
smems[i].Size = 0;
smems[i].RefCnt = 0;
}
}
}
static pointer
MapVidMem(int ScreenNum, unsigned long Base, unsigned long Size, int flags)
{
static int once;
int free_slot = -1;
int i;
if (!once)
{
atexit(smemCleanup);
once = 1;
}
for (i = 0; i < MAX_SMEMS; i++)
{
if (!*smems[i].name && free_slot == -1)
free_slot = i;
if (smems[i].Base == Base && smems[i].Size == Size
&& *smems[i].name) {
smems[i].RefCnt++;
return smems[i].ptr;
}
}
if (i == MAX_SMEMS && free_slot == -1)
{
FatalError("MapVidMem: failed to smem_create Base %x Size %x (out of SMEMS entries)\n",
Base, Size);
}
i = free_slot;
sprintf(smems[i].name, "Video-%d", i);
smems[i].Base = Base;
smems[i].Size = Size;
xf86MsgVerb(X_INFO, 3, "MapVidMem: Base=0x%x Size=0x%x\n",
Base, Size);
#if defined(__powerpc__)
if (((unsigned long)Base & PHYS_IO_MEM_START) != PHYS_IO_MEM_START) {
Base = Base | PHYS_IO_MEM_START;
}
#endif
smems[i].ptr = smem_create(smems[i].name, (char *)Base, Size, SM_READ|SM_WRITE);
smems[i].RefCnt = 1;
if (smems[i].ptr == NULL)
{
/* check if there is a stale segment around */
if (smem_remove(smems[i].name) == 0) {
xf86Msg(X_INFO,
"MapVidMem: removed stale smem_ segment %s\n",
smems[i].name);
smems[i].ptr = smem_create(smems[i].name,
(char *)Base, Size, SM_READ|SM_WRITE);
}
if (smems[i].ptr == NULL) {
*smems[i].name = '\0';
FatalError("MapVidMem: failed to smem_create Base %x Size %x (%s)\n",
Base, Size, strerror(errno));
}
}
xf86MsgVerb(X_INFO, 3, "MapVidMem: Base=0x%x Size=0x%x Ptr=0x%x\n",
Base, Size, smems[i].ptr);
return smems[i].ptr;
}
static void
UnMapVidMem(int ScreenNum, pointer Base, unsigned long Size)
{
int i;
xf86MsgVerb(X_INFO, 3, "UnMapVidMem: Base/Ptr=0x%x Size=0x%x\n",
Base, Size);
for (i = 0; i < MAX_SMEMS; i++)
{
if (*smems[i].name && smems[i].ptr == Base
&& smems[i].Size == Size)
{
if (--smems[i].RefCnt > 0)
return;
(void)smem_create(NULL, smems[i].ptr, 0, SM_DETACH);
xf86MsgVerb(X_INFO, 3,
"UnMapVidMem: smem_create(%s, 0x%08x, ... "
"SM_DETACH)\n", smems[i].name, smems[i].ptr);
(void)smem_remove(smems[i].name);
*smems[i].name = '\0';
smems[i].RefCnt = 0;
return;
}
}
xf86MsgVerb(X_WARNING, 2,
"UnMapVidMem: no SMEM found for Base = %lx Size = %lx\n",
Base, Size);
}
void
xf86OSInitVidMem(VidMemInfoPtr pVidMem)
{
pVidMem->linearSupported = TRUE;
pVidMem->mapMem = MapVidMem;
pVidMem->unmapMem = UnMapVidMem;
pVidMem->setWC = 0;
pVidMem->undoWC = 0;
#ifdef HAS_MTRR_SUPPORT
if (cleanMTRR()) {
pVidMem->setWC = setWC;
pVidMem->undoWC = undoWC;
}
#endif
pVidMem->initialised = TRUE;
}
/***************************************************************************/
/* Interrupt Handling section */
/***************************************************************************/
Bool
xf86DisableInterrupts()
{
return(TRUE);
}
void
xf86EnableInterrupts()
{
return;
}
/***************************************************************************/
/* I/O Permissions section for PowerPC */
/***************************************************************************/
#if defined(__powerpc__)
volatile unsigned char *ioBase = MAP_FAILED;
volatile unsigned char *pciConfBase = MAP_FAILED;
static int IOEnabled;
static void
removeIOSmem(void)
{
smem_create(NULL, (char *) ioBase, 0, SM_DETACH);
smem_remove("IOBASE");
ioBase = MAP_FAILED;
}
Bool
xf86EnableIO()
{
if (IOEnabled++ == 0) {
ioBase = (unsigned char *) smem_create("IOBASE",
(char *)PHYS_ISA_IO_SPACE, 64*1024, SM_READ|SM_WRITE);
if (ioBase == MAP_FAILED) {
--IOEnabled;
xf86Msg(X_WARNING,"xf86EnableIO: Failed to map I/O\n");
return FALSE;
} else {
#ifdef DEBUG
ErrorF("xf86EnableIO: mapped I/O at vaddr 0x%08x\n",
ioBase);
#endif
atexit(removeIOSmem);
}
}
return TRUE;
}
void
xf86DisableIO()
{
if (!IOEnabled)
return;
if (--IOEnabled == 0)
removeIOSmem();
return;
}
#if 0
void
xf86DisableIOPrivs(void)
{
return;
}
#endif
void
ppcPciIoMap(int bus)
{
xf86EnableIO();
}
#endif
#ifdef HAS_MTRR_SUPPORT
/* memory range (MTRR) support for LynxOS (taken from BSD MTRR support) */
/*
* This code is experimental. Some parts may be overkill, and other parts
* may be incomplete.
*/
/*
* getAllRanges returns the full list of memory ranges with attributes set.
*/
static struct mem_range_desc *
getAllRanges(int *nmr)
{
struct mem_range_desc *mrd;
struct mem_range_op mro;
/*
* Find how many ranges there are. If this fails, then the kernel
* probably doesn't have MTRR support.
*/
mro.mo_arg[0] = 0;
if (ioctl(devMemFd, MEMRANGE_GET, &mro))
return NULL;
*nmr = mro.mo_arg[0];
mrd = xnfalloc(*nmr * sizeof(struct mem_range_desc));
mro.mo_arg[0] = *nmr;
mro.mo_desc = mrd;
if (ioctl(devMemFd, MEMRANGE_GET, &mro)) {
xfree(mrd);
return NULL;
}
return mrd;
}
/*
* cleanMTRR removes any memory attribute that may be left by a previous
* X server. Normally there won't be any, but this takes care of the
* case where a server crashed without being able finish cleaning up.
*/
static Bool
cleanMTRR()
{
struct mem_range_desc *mrd;
struct mem_range_op mro;
int nmr, i;
/* This shouldn't happen */
if (devMemFd < 0) {
if ((devMemFd = open(MTRR_DEVICE, O_RDONLY)) < 0) {
perror("open MTRR");
return FALSE;
}
}
if (!(mrd = getAllRanges(&nmr)))
return FALSE;
for (i = 0; i < nmr; i++) {
if (strcmp(mrd[i].mr_owner, X_MTRR_ID) == 0 &&
(mrd[i].mr_flags & MDF_ACTIVE)) {
#ifdef DEBUG
ErrorF("Clean for (0x%lx,0x%lx)\n",
(unsigned long)mrd[i].mr_base,
(unsigned long)mrd[i].mr_len);
#endif
if (mrd[i].mr_flags & MDF_FIXACTIVE) {
mro.mo_arg[0] = MEMRANGE_SET_UPDATE;
mrd[i].mr_flags = MDF_UNCACHEABLE;
} else {
mro.mo_arg[0] = MEMRANGE_SET_REMOVE;
}
mro.mo_desc = mrd + i;
ioctl(devMemFd, MEMRANGE_SET, &mro);
}
}
#ifdef DEBUG
sleep(10);
#endif
xfree(mrd);
return TRUE;
}
typedef struct x_RangeRec {
struct mem_range_desc mrd;
Bool wasWC;
struct x_RangeRec * next;
} RangeRec, *RangePtr;
static void
freeRangeList(RangePtr range)
{
RangePtr rp;
while (range) {
rp = range;
range = rp->next;
xfree(rp);
}
}
static RangePtr
dupRangeList(RangePtr list)
{
RangePtr new = NULL, rp, p;
rp = list;
while (rp) {
p = xnfalloc(sizeof(RangeRec));
*p = *rp;
p->next = new;
new = p;
rp = rp->next;
}
return new;
}
static RangePtr
sortRangeList(RangePtr list)
{
RangePtr rp1, rp2, copy, sorted = NULL, minp, prev, minprev;
unsigned long minBase;
/* Sort by base address */
rp1 = copy = dupRangeList(list);
while (rp1) {
minBase = rp1->mrd.mr_base;
minp = rp1;
minprev = NULL;
prev = rp1;
rp2 = rp1->next;
while (rp2) {
if (rp2->mrd.mr_base < minBase) {
minBase = rp2->mrd.mr_base;
minp = rp2;
minprev = prev;
}
prev = rp2;
rp2 = rp2->next;
}
if (minprev) {
minprev->next = minp->next;
rp1 = copy;
} else {
rp1 = minp->next;
}
minp->next = sorted;
sorted = minp;
}
return sorted;
}
/*
* findRanges returns a list of ranges that overlap the specified range.
*/
static void
findRanges(unsigned long base, unsigned long size, RangePtr *ucp, RangePtr *wcp)
{
struct mem_range_desc *mrd;
int nmr, i;
RangePtr rp, *p;
if (!(mrd = getAllRanges(&nmr)))
return;
for (i = 0; i < nmr; i++) {
if ((mrd[i].mr_flags & MDF_ACTIVE) &&
mrd[i].mr_base < base + size &&
mrd[i].mr_base + mrd[i].mr_len > base) {
if (mrd[i].mr_flags & MDF_WRITECOMBINE)
p = wcp;
else if (mrd[i].mr_flags & MDF_UNCACHEABLE)
p = ucp;
else
continue;
rp = xnfalloc(sizeof(RangeRec));
rp->mrd = mrd[i];
rp->next = *p;
*p = rp;
}
}
xfree(mrd);
}
/*
* This checks if the existing overlapping ranges fully cover the requested
* range. Is this overkill?
*/
static Bool
fullCoverage(unsigned long base, unsigned long size, RangePtr overlap)
{
RangePtr rp1, sorted = NULL;
unsigned long end;
sorted = sortRangeList(overlap);
/* Look for gaps */
rp1 = sorted;
end = base + size;
while (rp1) {
if (rp1->mrd.mr_base > base) {
freeRangeList(sorted);
return FALSE;
} else {
base = rp1->mrd.mr_base + rp1->mrd.mr_len;
}
if (base >= end) {
freeRangeList(sorted);
return TRUE;
}
rp1 = rp1->next;
}
freeRangeList(sorted);
return FALSE;
}
static pointer
addWC(int screenNum, unsigned long base, unsigned long size, MessageType from)
{
RangePtr uc = NULL, wc = NULL, retlist = NULL;
struct mem_range_desc mrd;
struct mem_range_op mro;
findRanges(base, size, &uc, &wc);
/* See of the full range is already WC */
if (!uc && fullCoverage(base, size, wc)) {
xf86DrvMsg(screenNum, from,
"Write-combining range (0x%lx,0x%lx) was already set\n",
base, size);
return NULL;
}
/* Otherwise, try to add the new range */
mrd.mr_base = base;
mrd.mr_len = size;
strcpy(mrd.mr_owner, X_MTRR_ID);
mrd.mr_flags = MDF_WRITECOMBINE;
mro.mo_desc = &mrd;
mro.mo_arg[0] = MEMRANGE_SET_UPDATE;
if (ioctl(devMemFd, MEMRANGE_SET, &mro)) {
xf86DrvMsg(screenNum, X_WARNING,
"Failed to set write-combining range "
"(0x%lx,0x%lx)\n", base, size);
return NULL;
} else {
xf86DrvMsg(screenNum, from,
"Write-combining range (0x%lx,0x%lx)\n", base, size);
retlist = xnfalloc(sizeof(RangeRec));
retlist->mrd = mrd;
retlist->wasWC = FALSE;
retlist->next = NULL;
return retlist;
}
}
static pointer
delWC(int screenNum, unsigned long base, unsigned long size, MessageType from)
{
RangePtr uc = NULL, wc = NULL, retlist = NULL;
struct mem_range_desc mrd;
struct mem_range_op mro;
findRanges(base, size, &uc, &wc);
/*
* See of the full range is already not WC, or if there is full
* coverage from UC ranges.
*/
if (!wc || fullCoverage(base, size, uc)) {
xf86DrvMsg(screenNum, from,
"Write-combining range (0x%lx,0x%lx) was already clear\n",
base, size);
return NULL;
}
/* Otherwise, try to add the new range */
mrd.mr_base = base;
mrd.mr_len = size;
strcpy(mrd.mr_owner, X_MTRR_ID);
mrd.mr_flags = MDF_UNCACHEABLE;
mro.mo_desc = &mrd;
mro.mo_arg[0] = MEMRANGE_SET_UPDATE;
if (ioctl(devMemFd, MEMRANGE_SET, &mro)) {
xf86DrvMsg(screenNum, X_WARNING,
"Failed to remove write-combining range "
"(0x%lx,0x%lx)\n", base, size);
/* XXX Should then remove all of the overlapping WC ranges */
return NULL;
} else {
xf86DrvMsg(screenNum, from,
"Removed Write-combining range (0x%lx,0x%lx)\n",
base, size);
retlist = xnfalloc(sizeof(RangeRec));
retlist->mrd = mrd;
retlist->wasWC = TRUE;
retlist->next = NULL;
return retlist;
}
}
static pointer
setWC(int screenNum, unsigned long base, unsigned long size, Bool enable,
MessageType from)
{
if (enable)
return addWC(screenNum, base, size, from);
else
return delWC(screenNum, base, size, from);
}
static void
undoWC(int screenNum, pointer list)
{
RangePtr rp;
struct mem_range_op mro;
Bool failed;
rp = list;
while (rp) {
#ifdef DEBUG
ErrorF("Undo for (0x%lx,0x%lx), %d\n",
(unsigned long)rp->mrd.mr_base,
(unsigned long)rp->mrd.mr_len, rp->wasWC);
#endif
failed = FALSE;
if (rp->wasWC) {
mro.mo_arg[0] = MEMRANGE_SET_UPDATE;
rp->mrd.mr_flags = MDF_WRITECOMBINE;
strcpy(rp->mrd.mr_owner, "unknown");
} else {
mro.mo_arg[0] = MEMRANGE_SET_REMOVE;
}
mro.mo_desc = &rp->mrd;
if (ioctl(devMemFd, MEMRANGE_SET, &mro)) {
if (!rp->wasWC) {
mro.mo_arg[0] = MEMRANGE_SET_UPDATE;
rp->mrd.mr_flags = MDF_UNCACHEABLE;
strcpy(rp->mrd.mr_owner, "unknown");
if (ioctl(devMemFd, MEMRANGE_SET, &mro))
failed = TRUE;
} else
failed = TRUE;
}
if (failed) {
xf86DrvMsg(screenNum, X_WARNING,
"Failed to restore MTRR range (0x%lx,0x%lx)\n",
(unsigned long)rp->mrd.mr_base,
(unsigned long)rp->mrd.mr_len);
}
rp = rp->next;
}
}
#endif /* HAS_MTRR_SUPPORT */
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