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NetBSD/sys/arch/x68k/dev/grf.c
oki e36077d7ba Implement poll(2).
1996-11-23 09:44:53 +00:00

696 lines
15 KiB
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/* $NetBSD: grf.c,v 1.5 1996/11/23 09:44:54 oki Exp $ */
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: Utah $Hdr: grf.c 1.36 93/08/13$
*
* @(#)grf.c 8.4 (Berkeley) 1/12/94
*/
/*
* Graphics display driver for the X68K machines.
* This is the hardware-independent portion of the driver.
* Hardware access is through the machine dependent grf switch routines.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/ioctl.h>
#include <sys/file.h>
#include <sys/malloc.h>
#include <sys/vnode.h>
#include <sys/mman.h>
#include <sys/poll.h>
#include <x68k/dev/grfioctl.h>
#include <x68k/dev/grfvar.h>
#include <x68k/dev/itevar.h>
#include <machine/cpu.h>
#ifdef COMPAT_HPUX
#include <compat/hpux/hpux.h>
extern struct emul emul_hpux;
#endif
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>
#include <miscfs/specfs/specdev.h>
#include "ite.h"
#if NITE == 0
#define iteon(u,f)
#define iteoff(u,f)
#endif
#ifdef DEBUG
int grfdebug = 0;
#define GDB_DEVNO 0x01
#define GDB_MMAP 0x02
#define GDB_IOMAP 0x04
#define GDB_LOCK 0x08
#endif
struct cfdriver grf_cd;
/*ARGSUSED*/
int
grfopen(dev, flags)
dev_t dev;
int flags;
{
int unit = GRFUNIT(dev);
register struct grf_softc *gp = grf_cd.cd_devs[unit];
int error = 0;
if (unit >= grf_cd.cd_ndevs || (gp->g_flags & GF_ALIVE) == 0)
return(ENXIO);
if ((gp->g_flags & (GF_OPEN|GF_EXCLUDE)) == (GF_OPEN|GF_EXCLUDE))
return(EBUSY);
#ifdef COMPAT_HPUX
/*
* XXX: cannot handle both HPUX and BSD processes at the same time
*/
if (curproc->p_emul == &emul_hpux)
if (gp->g_flags & GF_BSDOPEN)
return(EBUSY);
else
gp->g_flags |= GF_HPUXOPEN;
else
if (gp->g_flags & GF_HPUXOPEN)
return(EBUSY);
else
gp->g_flags |= GF_BSDOPEN;
#endif
/*
* First open.
* XXX: always put in graphics mode.
*/
error = 0;
if ((gp->g_flags & GF_OPEN) == 0) {
gp->g_flags |= GF_OPEN;
error = grfon(dev);
}
return(error);
}
/*ARGSUSED*/
int
grfclose(dev, flags)
dev_t dev;
int flags;
{
register struct grf_softc *gp = grf_cd.cd_devs[GRFUNIT(dev)];
(void) grfoff(dev);
#ifdef COMPAT_HPUX
(void) grfunlock(gp);
#endif
gp->g_flags &= GF_ALIVE;
return(0);
}
/*ARGSUSED*/
int
grfioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
int unit = GRFUNIT(dev);
register struct grf_softc *gp = grf_cd.cd_devs[unit];
int error;
#ifdef COMPAT_HPUX
if (p->p_emul == &emul_hpux)
return(hpuxgrfioctl(dev, cmd, data, flag, p));
#endif
error = 0;
switch (cmd) {
case GRFIOCGINFO:
bcopy((caddr_t)&gp->g_display, data, sizeof(struct grfinfo));
break;
case GRFIOCON:
error = grfon(dev);
break;
case GRFIOCOFF:
error = grfoff(dev);
break;
case GRFIOCMAP:
error = grfmap(dev, (caddr_t *)data, p);
break;
case GRFIOCUNMAP:
error = grfunmap(dev, *(caddr_t *)data, p);
break;
case GRFSETVMODE:
error = (*gp->g_sw->gd_mode)(gp, GM_GRFSETVMODE, data);
if (error == 0)
ite_reinit(unit);
break;
default:
error = EINVAL;
break;
}
return(error);
}
/*ARGSUSED*/
int
grfpoll(dev, events, p)
dev_t dev;
int events;
struct proc *p;
{
int revents = 0;
if (events & (POLLOUT | POLLWRNORM))
revents |= events & (POLLOUT | POLLWRNORM);
return (revents);
}
/*ARGSUSED*/
int
grfmmap(dev, off, prot)
dev_t dev;
int off, prot;
{
return (grfaddr(grf_cd.cd_devs[GRFUNIT(dev)], off));
}
int
grfon(dev)
dev_t dev;
{
int unit = GRFUNIT(dev);
struct grf_softc *gp = grf_cd.cd_devs[unit];
/*
* XXX: iteoff call relies on devices being in same order
* as ITEs and the fact that iteoff only uses the minor part
* of the dev arg.
*/
iteoff(unit, 2);
return((*gp->g_sw->gd_mode)(gp,
(dev&GRFOVDEV) ? GM_GRFOVON : GM_GRFON,
(caddr_t)0));
}
int
grfoff(dev)
dev_t dev;
{
int unit = GRFUNIT(dev);
struct grf_softc *gp = grf_cd.cd_devs[unit];
int error;
(void) grfunmap(dev, (caddr_t)0, curproc);
error = (*gp->g_sw->gd_mode)(gp,
(dev&GRFOVDEV) ? GM_GRFOVOFF : GM_GRFOFF,
(caddr_t)0);
/* XXX: see comment for iteoff above */
iteon(unit, 2);
return(error);
}
int
grfaddr(gp, off)
struct grf_softc *gp;
register int off;
{
register struct grfinfo *gi = &gp->g_display;
/* control registers */
if (off >= 0 && off < gi->gd_regsize)
return(((u_int)gi->gd_regaddr + off) >> PGSHIFT);
/* frame buffer */
if (off >= gi->gd_regsize && off < gi->gd_regsize+gi->gd_fbsize) {
off -= gi->gd_regsize;
return(((u_int)gi->gd_fbaddr + off) >> PGSHIFT);
}
/* bogus */
return(-1);
}
/*
* HP-UX compatibility routines
*/
#ifdef COMPAT_HPUX
/*ARGSUSED*/
hpuxgrfioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
register struct grf_softc *gp = grf_cd.cd_devs[GRFUNIT(dev)];
int error;
error = 0;
switch (cmd) {
case GCID:
*(int *)data = gp->g_display.gd_id;
break;
case GCON:
error = grfon(dev);
break;
case GCOFF:
error = grfoff(dev);
break;
case GCLOCK:
error = grflock(gp, 1);
break;
case GCUNLOCK:
error = grfunlock(gp);
break;
case GCAON:
case GCAOFF:
break;
/* GCSTATIC is implied by our implementation */
case GCSTATIC_CMAP:
case GCVARIABLE_CMAP:
break;
/* map in control regs and frame buffer */
case GCMAP:
error = grfmap(dev, (caddr_t *)data, p);
break;
case GCUNMAP:
error = grfunmap(dev, *(caddr_t *)data, p);
/* XXX: HP-UX uses GCUNMAP to get rid of GCSLOT memory */
if (error)
error = grflckunmmap(dev, *(caddr_t *)data);
break;
case GCSLOT:
{
struct grf_slot *sp = (struct grf_slot *)data;
sp->slot = grffindpid(gp);
if (sp->slot) {
error = grflckmmap(dev, (caddr_t *)&sp->addr);
if (error && gp->g_pid) {
free((caddr_t)gp->g_pid, M_DEVBUF);
gp->g_pid = NULL;
}
} else
error = EINVAL; /* XXX */
break;
}
case GCDESCRIBE:
error = (*gp->g_sw->gd_mode)(gp, GM_DESCRIBE, data);
break;
/*
* XXX: only used right now to map in rbox control registers
* Will be replaced in the future with a real IOMAP interface.
*/
case IOMAPMAP:
error = iommap(dev, (caddr_t *)data);
#if 0
/*
* It may not be worth kludging this (using p_devtmp) to
* make this work. It was an undocumented side-effect
* in HP-UX that the mapped address was the return value
* of the ioctl. The only thing I remember that counted
* on this behavior was the rbox X10 server.
*/
if (!error)
u.u_r.r_val1 = *(int *)data; /* XXX: this sux */
#endif
break;
case IOMAPUNMAP:
error = iounmmap(dev, *(caddr_t *)data);
break;
default:
error = EINVAL;
break;
}
return(error);
}
grflock(gp, block)
register struct grf_softc *gp;
int block;
{
struct proc *p = curproc; /* XXX */
int error;
extern char devioc[];
#ifdef DEBUG
if (grfdebug & GDB_LOCK)
printf("grflock(%d): dev %x flags %x lockpid %x\n",
p->p_pid, gp-grf_softc, gp->g_flags,
gp->g_lockp ? gp->g_lockp->p_pid : -1);
#endif
if (gp->g_pid) {
#ifdef DEBUG
if (grfdebug & GDB_LOCK)
printf(" lockpslot %d lockslot %d lock[lockslot] %d\n",
gp->g_lock->gl_lockslot, gp->g_lockpslot,
gp->g_lock->gl_locks[gp->g_lockpslot]);
#endif
gp->g_lock->gl_lockslot = 0;
if (gp->g_lock->gl_locks[gp->g_lockpslot] == 0) {
gp->g_lockp = NULL;
gp->g_lockpslot = 0;
}
}
if (gp->g_lockp) {
if (gp->g_lockp == p)
return(EBUSY);
if (!block)
return(OEAGAIN);
do {
gp->g_flags |= GF_WANTED;
if (error = tsleep((caddr_t)&gp->g_flags,
(PZERO+1) | PCATCH, devioc, 0))
return (error);
} while (gp->g_lockp);
}
gp->g_lockp = p;
if (gp->g_pid) {
int slot = grffindpid(gp);
#ifdef DEBUG
if (grfdebug & GDB_LOCK)
printf(" slot %d\n", slot);
#endif
gp->g_lockpslot = gp->g_lock->gl_lockslot = slot;
gp->g_lock->gl_locks[slot] = 1;
}
return(0);
}
grfunlock(gp)
register struct grf_softc *gp;
{
#ifdef DEBUG
if (grfdebug & GDB_LOCK)
printf("grfunlock(%d): dev %x flags %x lockpid %d\n",
curproc->p_pid, gp-grf_softc, gp->g_flags,
gp->g_lockp ? gp->g_lockp->p_pid : -1);
#endif
if (gp->g_lockp != curproc)
return(EBUSY);
if (gp->g_pid) {
#ifdef DEBUG
if (grfdebug & GDB_LOCK)
printf(" lockpslot %d lockslot %d lock[lockslot] %d\n",
gp->g_lock->gl_lockslot, gp->g_lockpslot,
gp->g_lock->gl_locks[gp->g_lockpslot]);
#endif
gp->g_lock->gl_locks[gp->g_lockpslot] = 0;
gp->g_lockpslot = gp->g_lock->gl_lockslot = 0;
}
if (gp->g_flags & GF_WANTED) {
wakeup((caddr_t)&gp->g_flags);
gp->g_flags &= ~GF_WANTED;
}
gp->g_lockp = NULL;
return(0);
}
/*
* Convert a BSD style minor devno to HPUX style.
* We cannot just create HPUX style nodes as they require 24 bits
* of minor device number and we only have 8.
* XXX: This may give the wrong result for remote stats of other
* machines where device 10 exists.
*/
grfdevno(dev)
dev_t dev;
{
int unit = GRFUNIT(dev);
struct grf_softc *gp = grf_cd.cd_devs[unit];
int newdev;
if (unit >= grf_cd.cd_ndevs || (gp->g_flags&GF_ALIVE) == 0)
return(bsdtohpuxdev(dev));
/* magic major number */
newdev = 12 << 24;
/* now construct minor number */
if (gp->g_display.gd_regaddr != (caddr_t)GRFIADDR) {
int sc = patosc(gp->g_display.gd_regaddr);
newdev |= (sc << 16) | 0x200;
}
if (dev & GRFIMDEV)
newdev |= 0x02;
else if (dev & GRFOVDEV)
newdev |= 0x01;
#ifdef DEBUG
if (grfdebug & GDB_DEVNO)
printf("grfdevno: dev %x newdev %x\n", dev, newdev);
#endif
return(newdev);
}
#endif /* COMPAT_HPUX */
int
grfmap(dev, addrp, p)
dev_t dev;
caddr_t *addrp;
struct proc *p;
{
struct grf_softc *gp = grf_cd.cd_devs[GRFUNIT(dev)];
int len, error;
struct vnode vn;
struct specinfo si;
int flags;
#ifdef DEBUG
if (grfdebug & GDB_MMAP)
printf("grfmap(%d): addr %p\n", p->p_pid, *addrp);
#endif
len = gp->g_display.gd_regsize + gp->g_display.gd_fbsize;
flags = MAP_SHARED;
if (*addrp)
flags |= MAP_FIXED;
else
*addrp = (caddr_t)0x1000000; /* XXX */
vn.v_type = VCHR; /* XXX */
vn.v_specinfo = &si; /* XXX */
vn.v_rdev = dev; /* XXX */
error = vm_mmap(&p->p_vmspace->vm_map, (vm_offset_t *)addrp,
(vm_size_t)len, VM_PROT_ALL, VM_PROT_ALL,
flags, (caddr_t)&vn, 0);
if (error == 0)
(void) (*gp->g_sw->gd_mode)(gp, GM_MAP, *addrp);
return(error);
}
int
grfunmap(dev, addr, p)
dev_t dev;
caddr_t addr;
struct proc *p;
{
struct grf_softc *gp = grf_cd.cd_devs[GRFUNIT(dev)];
vm_size_t size;
int rv;
#ifdef DEBUG
if (grfdebug & GDB_MMAP)
printf("grfunmap(%d): dev %x addr %p\n", p->p_pid, dev, addr);
#endif
if (addr == 0)
return(EINVAL); /* XXX: how do we deal with this? */
(void) (*gp->g_sw->gd_mode)(gp, GM_UNMAP, 0);
size = round_page(gp->g_display.gd_regsize + gp->g_display.gd_fbsize);
rv = vm_deallocate(&p->p_vmspace->vm_map, (vm_offset_t)addr, size);
return(rv == KERN_SUCCESS ? 0 : EINVAL);
}
#ifdef COMPAT_HPUX
iommap(dev, addrp)
dev_t dev;
caddr_t *addrp;
{
#ifdef DEBUG
if (grfdebug & (GDB_MMAP|GDB_IOMAP))
printf("iommap(%d): addr %x\n", curproc->p_pid, *addrp);
#endif
return(EINVAL);
}
iounmmap(dev, addr)
dev_t dev;
caddr_t addr;
{
int unit = minor(dev);
#ifdef DEBUG
if (grfdebug & (GDB_MMAP|GDB_IOMAP))
printf("iounmmap(%d): id %d addr %x\n",
curproc->p_pid, unit, addr);
#endif
return(0);
}
/*
* Processes involved in framebuffer mapping via GCSLOT are recorded in
* an array of pids. The first element is used to record the last slot used
* (for faster lookups). The remaining elements record up to GRFMAXLCK-1
* process ids. Returns a slot number between 1 and GRFMAXLCK or 0 if no
* slot is available.
*/
grffindpid(gp)
struct grf_softc *gp;
{
register short pid, *sp;
register int i, limit;
int ni;
if (gp->g_pid == NULL) {
gp->g_pid = (short *)
malloc(GRFMAXLCK * sizeof(short), M_DEVBUF, M_WAITOK);
bzero((caddr_t)gp->g_pid, GRFMAXLCK * sizeof(short));
}
pid = curproc->p_pid;
ni = limit = gp->g_pid[0];
for (i = 1, sp = &gp->g_pid[1]; i <= limit; i++, sp++) {
if (*sp == pid)
goto done;
if (*sp == 0)
ni = i;
}
i = ni;
if (i < limit) {
gp->g_pid[i] = pid;
goto done;
}
if (++i == GRFMAXLCK)
return(0);
gp->g_pid[0] = i;
gp->g_pid[i] = pid;
done:
#ifdef DEBUG
if (grfdebug & GDB_LOCK)
printf("grffindpid(%d): slot %d of %d\n",
pid, i, gp->g_pid[0]);
#endif
return(i);
}
grfrmpid(gp)
struct grf_softc *gp;
{
register short pid, *sp;
register int limit, i;
int mi;
if (gp->g_pid == NULL || (limit = gp->g_pid[0]) == 0)
return;
pid = curproc->p_pid;
limit = gp->g_pid[0];
mi = 0;
for (i = 1, sp = &gp->g_pid[1]; i <= limit; i++, sp++) {
if (*sp == pid)
*sp = 0;
else if (*sp)
mi = i;
}
i = mi;
if (i < limit)
gp->g_pid[0] = i;
#ifdef DEBUG
if (grfdebug & GDB_LOCK)
printf("grfrmpid(%d): slot %d of %d\n",
pid, sp-gp->g_pid, gp->g_pid[0]);
#endif
}
grflckmmap(dev, addrp)
dev_t dev;
caddr_t *addrp;
{
#ifdef DEBUG
struct proc *p = curproc; /* XXX */
if (grfdebug & (GDB_MMAP|GDB_LOCK))
printf("grflckmmap(%d): addr %x\n",
p->p_pid, *addrp);
#endif
return(EINVAL);
}
grflckunmmap(dev, addr)
dev_t dev;
caddr_t addr;
{
#ifdef DEBUG
int unit = minor(dev);
if (grfdebug & (GDB_MMAP|GDB_LOCK))
printf("grflckunmmap(%d): id %d addr %x\n",
curproc->p_pid, unit, addr);
#endif
return(EINVAL);
}
#endif /* COMPAT_HPUX */
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