ee80f1200e
our MD bus_space_probe() extension). This has several side effects: - NuBus drivers must map and unmap slot space, rather than relying on this happening before they are attached. - Functions exported to NuBus drivers from nubus.c now need to be supplied with a bus space tag/handle pair. - Old bus map/peek functions can be garbage collected, as can pmap support for the same. Because of some current limitations of the bus space specification, we are violating the abstraction in grf_mv (NuBus grf driver). All such violations are clearly marked /* XXX */, and must be addressed when the specification is updated.
413 lines
9.0 KiB
C
413 lines
9.0 KiB
C
/* $NetBSD: grf.c,v 1.42 1997/05/11 19:11:27 scottr Exp $ */
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1990 The Regents of the University of California.
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* 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 $Hdr: grf.c 1.31 91/01/21$
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*
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* @(#)grf.c 7.8 (Berkeley) 5/7/91
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*/
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/*
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* Graphics display driver for the Macintosh.
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* This is the hardware-independent portion of the driver.
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* Hardware access is through the grfdev routines below.
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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/ioctl.h>
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#include <sys/file.h>
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#include <sys/malloc.h>
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#include <sys/mman.h>
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#include <sys/poll.h>
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#include <sys/proc.h>
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#include <sys/vnode.h>
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#include <sys/systm.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/grfioctl.h>
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#include <miscfs/specfs/specdev.h>
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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 "nubus.h"
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#include "itevar.h"
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#include "grfvar.h"
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#include "grf.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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int grfmatch __P((struct device *, struct cfdata *, void *));
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void grfattach __P((struct device *, struct device *, void *));
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struct cfdriver grf_cd = {
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NULL, "grf", DV_DULL
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};
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struct cfattach grf_ca = {
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sizeof(struct grf_softc), grfmatch, grfattach
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};
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#ifdef DEBUG
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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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static int grfdebug = (GDB_DEVNO|GDB_MMAP|GDB_IOMAP|GDB_LOCK);
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#endif
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int
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grfmatch(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct grfbus_attach_args *ga = aux;
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return (strcmp(ga->ga_name, "grf") == 0);
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}
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void
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grfattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct grf_softc *sc = (struct grf_softc *)self;
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struct grfbus_attach_args *ga = aux;
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printf("\n");
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/* Load forwarded pointers. */
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sc->sc_grfmode = ga->ga_grfmode;
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sc->sc_slot = ga->ga_slot;
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sc->sc_tag = ga->ga_tag;
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sc->sc_handle = ga->ga_handle;
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sc->sc_mode = ga->ga_mode;
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sc->sc_phys = ga->ga_phys;
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sc->sc_flags = GF_ALIVE; /* XXX bogus */
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/*
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* Attach ite semantics to the grf. Change the name, forward
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* everything else.
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*/
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ga->ga_name = "ite";
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(void)config_found(self, ga, grfbusprint);
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}
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/*ARGSUSED*/
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int
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grfopen(dev, flag, mode, p)
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dev_t dev;
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int flag;
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int mode;
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struct proc *p;
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{
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register struct grf_softc *gp;
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int unit;
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int error;
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unit = GRFUNIT(dev);
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gp = grf_cd.cd_devs[unit];
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if (unit >= grf_cd.cd_ndevs || (gp->sc_flags & GF_ALIVE) == 0)
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return (ENXIO);
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if ((gp->sc_flags & (GF_OPEN | GF_EXCLUDE)) == (GF_OPEN | GF_EXCLUDE))
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return (EBUSY);
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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->sc_flags & GF_OPEN) == 0) {
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gp->sc_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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int
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grfclose(dev, flag, mode, p)
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dev_t dev;
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int flag;
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int mode;
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struct proc *p;
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{
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register struct grf_softc *gp;
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gp = grf_cd.cd_devs[GRFUNIT(dev)];
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(void) grfoff(dev);
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gp->sc_flags &= GF_ALIVE;
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return (0);
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}
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/*ARGSUSED*/
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int
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grfioctl(dev, cmd, data, flag, p)
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dev_t dev;
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int 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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struct grf_softc *gp;
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struct grfmode *gm;
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int error;
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int unit = GRFUNIT(dev);
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gp = grf_cd.cd_devs[unit];
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gm = gp->sc_grfmode;
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error = 0;
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switch (cmd) {
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case GRFIOCGINFO: /* XXX - This should go away as soon as X and */
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/* dt are fixed to use GRFIOC*MODE* */
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{ struct grfinfo *g;
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g = (struct grfinfo *) data;
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bzero(data, sizeof(struct grfinfo));
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g->gd_id = gm->mode_id;
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g->gd_fbaddr = gm->fbbase;
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g->gd_fbsize = gm->fbsize;
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g->gd_colors = 1 << (u_int32_t) gm->psize;
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g->gd_planes = gm->psize;
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g->gd_fbwidth = g->gd_dwidth = gm->width;
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g->gd_fbheight = g->gd_dheight = gm->height;
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g->gd_fbrowbytes = gm->rowbytes;
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}
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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 GRFIOCGMODE:
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bcopy(gm, data, sizeof(struct grfmode));
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break;
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case GRFIOCGETMODE:
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error = (*gp->sc_mode)(gp, GM_CURRMODE, data);
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break;
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case GRFIOCSETMODE:
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error = (*gp->sc_mode)(gp, GM_NEWMODE, data);
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break;
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case GRFIOCLISTMODES:
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error = (*gp->sc_mode)(gp, GM_LISTMODES, 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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/*ARGSUSED*/
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int
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grfpoll(dev, events, p)
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dev_t dev;
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int events;
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struct proc *p;
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{
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return (events & (POLLOUT | POLLWRNORM));
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}
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/*ARGSUSED*/
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int
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grfmmap(dev, off, prot)
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dev_t dev;
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int off;
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int prot;
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{
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int unit = GRFUNIT(dev);
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struct grf_softc *gp;
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gp = grf_cd.cd_devs[unit];
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return (grfaddr(gp, off));
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}
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int
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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;
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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, 3);
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return (*gp->sc_mode) (gp, GM_GRFON, NULL);
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}
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int
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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;
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int error;
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gp = grf_cd.cd_devs[unit];
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(void) grfunmap(dev, (caddr_t) 0, curproc);
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error = (*gp->sc_mode) (gp, GM_GRFOFF, NULL);
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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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int
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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 grfmode *gm = gp->sc_grfmode;
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u_long addr;
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if (off < mac68k_round_page(gm->fbsize + gm->fboff)) {
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addr = (u_long)(*gp->sc_phys)(gp, (vm_offset_t)gm->fbbase)+off;
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return mac68k_btop(addr);
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}
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/* bogus */
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return (-1);
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}
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int
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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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extern u_int32_t mac68k_vidphys;
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struct grf_softc *gp;
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struct specinfo si;
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struct vnode vn;
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int len, error;
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int flags;
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gp = grf_cd.cd_devs[GRFUNIT(dev)];
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#ifdef DEBUG
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if (grfdebug & GDB_MMAP)
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printf("grfmap(%d): addr %p\n", p->p_pid, *addrp);
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#endif
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len = mac68k_round_page(gp->sc_grfmode->fbsize + gp->sc_grfmode->fboff);
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flags = MAP_SHARED | MAP_FIXED;
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if (gp->sc_slot == NULL)
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*addrp = (caddr_t) mac68k_trunc_page(mac68k_vidphys);
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else
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*addrp = (caddr_t) mac68k_trunc_page(
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NUBUS_SLOT2PA(gp->sc_slot->slot));
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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, flags, (caddr_t) &vn, 0);
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/* Offset into page: */
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*addrp += (unsigned long) gp->sc_grfmode->fboff & 0xfff;
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#ifdef DEBUG
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if (grfdebug & GDB_MMAP)
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printf("grfmap(%d): returning addr %p\n", p->p_pid, *addrp);
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#endif
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return (error);
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}
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int
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grfunmap(dev, addr, p)
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dev_t dev;
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caddr_t addr;
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struct proc *p;
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{
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struct grf_softc *gp;
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vm_size_t size;
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int rv;
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gp = grf_cd.cd_devs[GRFUNIT(dev)];
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#ifdef DEBUG
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if (grfdebug & GDB_MMAP)
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printf("grfunmap(%d): dev %x addr %p\n", p->p_pid, dev, addr);
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#endif
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if (addr == 0)
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return (EINVAL);/* XXX: how do we deal with this? */
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size = round_page(gp->sc_grfmode->fbsize);
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rv = vm_deallocate(&p->p_vmspace->vm_map, (vm_offset_t) addr, size);
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return (rv == KERN_SUCCESS ? 0 : EINVAL);
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}
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