/* $NetBSD: grf.c,v 1.3 1996/10/11 00:39:26 christos 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 #include #include #include #include #include #include #include #include #include #include #include #include #ifdef COMPAT_HPUX #include extern struct emul emul_hpux; #endif #include #include #include #include #include #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 grfselect(dev, rw) dev_t dev; int rw; { if (rw == FREAD) return(0); return(1); } /*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) kprintf("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) kprintf(" 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) kprintf(" 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) kprintf("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) kprintf(" 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) kprintf("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) kprintf("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) kprintf("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)) kprintf("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)) kprintf("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) kprintf("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) kprintf("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)) kprintf("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)) kprintf("grflckunmmap(%d): id %d addr %x\n", curproc->p_pid, unit, addr); #endif return(EINVAL); } #endif /* COMPAT_HPUX */