681 lines
15 KiB
C
681 lines
15 KiB
C
/* $NetBSD: grf.c,v 1.1.1.1 1996/05/05 12:17:03 oki Exp $ */
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah $Hdr: grf.c 1.36 93/08/13$
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*
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* @(#)grf.c 8.4 (Berkeley) 1/12/94
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*/
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/*
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* Graphics display driver for the X68K machines.
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* This is the hardware-independent portion of the driver.
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* Hardware access is through the machine dependent grf switch routines.
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*/
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#include <sys/param.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <sys/ioctl.h>
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#include <sys/file.h>
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#include <sys/malloc.h>
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#include <sys/vnode.h>
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#include <sys/mman.h>
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#include <x68k/dev/grfioctl.h>
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#include <x68k/dev/grfvar.h>
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#include <x68k/dev/itevar.h>
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#include <machine/cpu.h>
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#ifdef COMPAT_HPUX
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#include <compat/hpux/hpux.h>
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extern struct emul emul_hpux;
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#endif
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#include <vm/vm.h>
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#include <vm/vm_kern.h>
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#include <vm/vm_page.h>
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#include <vm/vm_pager.h>
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#include <miscfs/specfs/specdev.h>
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#include "ite.h"
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#if NITE == 0
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#define iteon(u,f)
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#define iteoff(u,f)
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#endif
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#ifdef DEBUG
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int grfdebug = 0;
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#define GDB_DEVNO 0x01
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#define GDB_MMAP 0x02
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#define GDB_IOMAP 0x04
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#define GDB_LOCK 0x08
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#endif
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struct cfdriver grf_cd;
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/*ARGSUSED*/
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grfopen(dev, flags)
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dev_t dev;
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int flags;
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{
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int unit = GRFUNIT(dev);
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register struct grf_softc *gp = grf_cd.cd_devs[unit];
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int error = 0;
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if (unit >= grf_cd.cd_ndevs || (gp->g_flags & GF_ALIVE) == 0)
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return(ENXIO);
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if ((gp->g_flags & (GF_OPEN|GF_EXCLUDE)) == (GF_OPEN|GF_EXCLUDE))
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return(EBUSY);
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#ifdef COMPAT_HPUX
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/*
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* XXX: cannot handle both HPUX and BSD processes at the same time
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*/
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if (curproc->p_emul == &emul_hpux)
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if (gp->g_flags & GF_BSDOPEN)
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return(EBUSY);
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else
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gp->g_flags |= GF_HPUXOPEN;
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else
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if (gp->g_flags & GF_HPUXOPEN)
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return(EBUSY);
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else
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gp->g_flags |= GF_BSDOPEN;
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#endif
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/*
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* First open.
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* XXX: always put in graphics mode.
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*/
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error = 0;
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if ((gp->g_flags & GF_OPEN) == 0) {
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gp->g_flags |= GF_OPEN;
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error = grfon(dev);
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}
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return(error);
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}
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/*ARGSUSED*/
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grfclose(dev, flags)
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dev_t dev;
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int flags;
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{
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register struct grf_softc *gp = grf_cd.cd_devs[GRFUNIT(dev)];
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(void) grfoff(dev);
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#ifdef COMPAT_HPUX
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(void) grfunlock(gp);
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#endif
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gp->g_flags &= GF_ALIVE;
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return(0);
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}
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/*ARGSUSED*/
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grfioctl(dev, cmd, data, flag, p)
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dev_t dev;
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u_long cmd;
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caddr_t data;
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int flag;
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struct proc *p;
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{
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int unit = GRFUNIT(dev);
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register struct grf_softc *gp = grf_cd.cd_devs[unit];
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int error;
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#ifdef COMPAT_HPUX
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if (p->p_emul == &emul_hpux)
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return(hpuxgrfioctl(dev, cmd, data, flag, p));
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#endif
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error = 0;
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switch (cmd) {
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case GRFIOCGINFO:
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bcopy((caddr_t)&gp->g_display, data, sizeof(struct grfinfo));
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break;
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case GRFIOCON:
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error = grfon(dev);
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break;
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case GRFIOCOFF:
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error = grfoff(dev);
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break;
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case GRFIOCMAP:
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error = grfmap(dev, (caddr_t *)data, p);
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break;
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case GRFIOCUNMAP:
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error = grfunmap(dev, *(caddr_t *)data, p);
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break;
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case GRFSETVMODE:
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error = (*gp->g_sw->gd_mode)(gp, GM_GRFSETVMODE, data);
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if (error == 0)
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ite_reinit(unit);
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break;
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default:
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error = EINVAL;
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break;
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}
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return(error);
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}
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/*ARGSUSED*/
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grfselect(dev, rw)
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dev_t dev;
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int rw;
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{
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if (rw == FREAD)
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return(0);
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return(1);
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}
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/*ARGSUSED*/
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grfmmap(dev, off, prot)
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dev_t dev;
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int off, prot;
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{
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return(grfaddr(grf_cd.cd_devs[GRFUNIT(dev)], off));
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}
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grfon(dev)
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dev_t dev;
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{
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int unit = GRFUNIT(dev);
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struct grf_softc *gp = grf_cd.cd_devs[unit];
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/*
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* XXX: iteoff call relies on devices being in same order
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* as ITEs and the fact that iteoff only uses the minor part
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* of the dev arg.
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*/
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iteoff(unit, 2);
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return((*gp->g_sw->gd_mode)(gp,
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(dev&GRFOVDEV) ? GM_GRFOVON : GM_GRFON,
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(caddr_t)0));
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}
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grfoff(dev)
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dev_t dev;
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{
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int unit = GRFUNIT(dev);
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struct grf_softc *gp = grf_cd.cd_devs[unit];
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int error;
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(void) grfunmap(dev, (caddr_t)0, curproc);
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error = (*gp->g_sw->gd_mode)(gp,
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(dev&GRFOVDEV) ? GM_GRFOVOFF : GM_GRFOFF,
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(caddr_t)0);
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/* XXX: see comment for iteoff above */
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iteon(unit, 2);
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return(error);
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}
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grfaddr(gp, off)
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struct grf_softc *gp;
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register int off;
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{
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register struct grfinfo *gi = &gp->g_display;
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/* control registers */
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if (off >= 0 && off < gi->gd_regsize)
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return(((u_int)gi->gd_regaddr + off) >> PGSHIFT);
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/* frame buffer */
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if (off >= gi->gd_regsize && off < gi->gd_regsize+gi->gd_fbsize) {
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off -= gi->gd_regsize;
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return(((u_int)gi->gd_fbaddr + off) >> PGSHIFT);
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}
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/* bogus */
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return(-1);
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}
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/*
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* HP-UX compatibility routines
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*/
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#ifdef COMPAT_HPUX
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/*ARGSUSED*/
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hpuxgrfioctl(dev, cmd, data, flag, p)
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dev_t dev;
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u_long cmd;
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caddr_t data;
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int flag;
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struct proc *p;
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{
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register struct grf_softc *gp = grf_cd.cd_devs[GRFUNIT(dev)];
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int error;
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error = 0;
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switch (cmd) {
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case GCID:
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*(int *)data = gp->g_display.gd_id;
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break;
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case GCON:
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error = grfon(dev);
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break;
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case GCOFF:
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error = grfoff(dev);
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break;
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case GCLOCK:
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error = grflock(gp, 1);
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break;
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case GCUNLOCK:
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error = grfunlock(gp);
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break;
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case GCAON:
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case GCAOFF:
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break;
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/* GCSTATIC is implied by our implementation */
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case GCSTATIC_CMAP:
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case GCVARIABLE_CMAP:
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break;
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/* map in control regs and frame buffer */
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case GCMAP:
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error = grfmap(dev, (caddr_t *)data, p);
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break;
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case GCUNMAP:
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error = grfunmap(dev, *(caddr_t *)data, p);
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/* XXX: HP-UX uses GCUNMAP to get rid of GCSLOT memory */
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if (error)
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error = grflckunmmap(dev, *(caddr_t *)data);
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break;
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case GCSLOT:
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{
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struct grf_slot *sp = (struct grf_slot *)data;
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sp->slot = grffindpid(gp);
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if (sp->slot) {
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error = grflckmmap(dev, (caddr_t *)&sp->addr);
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if (error && gp->g_pid) {
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free((caddr_t)gp->g_pid, M_DEVBUF);
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gp->g_pid = NULL;
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}
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} else
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error = EINVAL; /* XXX */
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break;
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}
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case GCDESCRIBE:
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error = (*gp->g_sw->gd_mode)(gp, GM_DESCRIBE, data);
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break;
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/*
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* XXX: only used right now to map in rbox control registers
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* Will be replaced in the future with a real IOMAP interface.
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*/
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case IOMAPMAP:
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error = iommap(dev, (caddr_t *)data);
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#if 0
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/*
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* It may not be worth kludging this (using p_devtmp) to
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* make this work. It was an undocumented side-effect
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* in HP-UX that the mapped address was the return value
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* of the ioctl. The only thing I remember that counted
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* on this behavior was the rbox X10 server.
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*/
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if (!error)
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u.u_r.r_val1 = *(int *)data; /* XXX: this sux */
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#endif
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break;
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case IOMAPUNMAP:
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error = iounmmap(dev, *(caddr_t *)data);
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break;
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default:
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error = EINVAL;
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break;
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}
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return(error);
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}
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grflock(gp, block)
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register struct grf_softc *gp;
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int block;
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{
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struct proc *p = curproc; /* XXX */
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int error;
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extern char devioc[];
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#ifdef DEBUG
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if (grfdebug & GDB_LOCK)
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printf("grflock(%d): dev %x flags %x lockpid %x\n",
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p->p_pid, gp-grf_softc, gp->g_flags,
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gp->g_lockp ? gp->g_lockp->p_pid : -1);
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#endif
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if (gp->g_pid) {
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#ifdef DEBUG
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if (grfdebug & GDB_LOCK)
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printf(" lockpslot %d lockslot %d lock[lockslot] %d\n",
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gp->g_lock->gl_lockslot, gp->g_lockpslot,
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gp->g_lock->gl_locks[gp->g_lockpslot]);
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#endif
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gp->g_lock->gl_lockslot = 0;
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if (gp->g_lock->gl_locks[gp->g_lockpslot] == 0) {
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gp->g_lockp = NULL;
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gp->g_lockpslot = 0;
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}
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}
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if (gp->g_lockp) {
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if (gp->g_lockp == p)
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return(EBUSY);
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if (!block)
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return(OEAGAIN);
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do {
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gp->g_flags |= GF_WANTED;
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if (error = tsleep((caddr_t)&gp->g_flags,
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(PZERO+1) | PCATCH, devioc, 0))
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return (error);
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} while (gp->g_lockp);
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}
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gp->g_lockp = p;
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if (gp->g_pid) {
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int slot = grffindpid(gp);
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#ifdef DEBUG
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if (grfdebug & GDB_LOCK)
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printf(" slot %d\n", slot);
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#endif
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gp->g_lockpslot = gp->g_lock->gl_lockslot = slot;
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gp->g_lock->gl_locks[slot] = 1;
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}
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return(0);
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}
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grfunlock(gp)
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register struct grf_softc *gp;
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{
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#ifdef DEBUG
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if (grfdebug & GDB_LOCK)
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printf("grfunlock(%d): dev %x flags %x lockpid %d\n",
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curproc->p_pid, gp-grf_softc, gp->g_flags,
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gp->g_lockp ? gp->g_lockp->p_pid : -1);
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#endif
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if (gp->g_lockp != curproc)
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return(EBUSY);
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if (gp->g_pid) {
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#ifdef DEBUG
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if (grfdebug & GDB_LOCK)
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printf(" lockpslot %d lockslot %d lock[lockslot] %d\n",
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gp->g_lock->gl_lockslot, gp->g_lockpslot,
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gp->g_lock->gl_locks[gp->g_lockpslot]);
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#endif
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gp->g_lock->gl_locks[gp->g_lockpslot] = 0;
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gp->g_lockpslot = gp->g_lock->gl_lockslot = 0;
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}
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if (gp->g_flags & GF_WANTED) {
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wakeup((caddr_t)&gp->g_flags);
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gp->g_flags &= ~GF_WANTED;
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}
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gp->g_lockp = NULL;
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return(0);
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}
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/*
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* Convert a BSD style minor devno to HPUX style.
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* We cannot just create HPUX style nodes as they require 24 bits
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* of minor device number and we only have 8.
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* XXX: This may give the wrong result for remote stats of other
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* machines where device 10 exists.
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*/
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grfdevno(dev)
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dev_t dev;
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{
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int unit = GRFUNIT(dev);
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struct grf_softc *gp = grf_cd.cd_devs[unit];
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int newdev;
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if (unit >= grf_cd.cd_ndevs || (gp->g_flags&GF_ALIVE) == 0)
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return(bsdtohpuxdev(dev));
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/* magic major number */
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newdev = 12 << 24;
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/* now construct minor number */
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if (gp->g_display.gd_regaddr != (caddr_t)GRFIADDR) {
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int sc = patosc(gp->g_display.gd_regaddr);
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newdev |= (sc << 16) | 0x200;
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}
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if (dev & GRFIMDEV)
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newdev |= 0x02;
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else if (dev & GRFOVDEV)
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newdev |= 0x01;
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#ifdef DEBUG
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if (grfdebug & GDB_DEVNO)
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printf("grfdevno: dev %x newdev %x\n", dev, newdev);
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#endif
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return(newdev);
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}
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#endif /* COMPAT_HPUX */
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grfmap(dev, addrp, p)
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dev_t dev;
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caddr_t *addrp;
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struct proc *p;
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{
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struct grf_softc *gp = grf_cd.cd_devs[GRFUNIT(dev)];
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int len, error;
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struct vnode vn;
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struct specinfo si;
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int flags;
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#ifdef DEBUG
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if (grfdebug & GDB_MMAP)
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printf("grfmap(%d): addr %x\n", p->p_pid, *addrp);
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#endif
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len = gp->g_display.gd_regsize + gp->g_display.gd_fbsize;
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flags = MAP_SHARED;
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if (*addrp)
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flags |= MAP_FIXED;
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else
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*addrp = (caddr_t)0x1000000; /* XXX */
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vn.v_type = VCHR; /* XXX */
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vn.v_specinfo = &si; /* XXX */
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vn.v_rdev = dev; /* XXX */
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error = vm_mmap(&p->p_vmspace->vm_map, (vm_offset_t *)addrp,
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(vm_size_t)len, VM_PROT_ALL, VM_PROT_ALL,
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flags, (caddr_t)&vn, 0);
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if (error == 0)
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(void) (*gp->g_sw->gd_mode)(gp, GM_MAP, *addrp);
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return(error);
|
|
}
|
|
|
|
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 %x\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 */
|