grf.c revision 1.37
1 /* $NetBSD: grf.c,v 1.37 2009/01/17 10:02:23 isaki Exp $ */ 2 3 /* 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Systems Programming Group of the University of Utah Computer 9 * Science Department. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * from: Utah $Hdr: grf.c 1.36 93/08/13$ 36 * 37 * @(#)grf.c 8.4 (Berkeley) 1/12/94 38 */ 39 /* 40 * Copyright (c) 1988 University of Utah. 41 * 42 * This code is derived from software contributed to Berkeley by 43 * the Systems Programming Group of the University of Utah Computer 44 * Science Department. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Berkeley and its contributors. 58 * 4. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 * from: Utah $Hdr: grf.c 1.36 93/08/13$ 75 * 76 * @(#)grf.c 8.4 (Berkeley) 1/12/94 77 */ 78 79 /* 80 * Graphics display driver for the X68K machines. 81 * This is the hardware-independent portion of the driver. 82 * Hardware access is through the machine dependent grf switch routines. 83 */ 84 85 #include <sys/cdefs.h> 86 __KERNEL_RCSID(0, "$NetBSD: grf.c,v 1.37 2009/01/17 10:02:23 isaki Exp $"); 87 88 #include <sys/param.h> 89 #include <sys/systm.h> 90 #include <sys/device.h> 91 #include <sys/proc.h> 92 #include <sys/resourcevar.h> 93 #include <sys/ioctl.h> 94 #include <sys/file.h> 95 #include <sys/malloc.h> 96 #include <sys/vnode.h> 97 #include <sys/mman.h> 98 #include <sys/conf.h> 99 100 #include <machine/grfioctl.h> 101 102 #include <x68k/dev/grfvar.h> 103 #include <x68k/dev/itevar.h> 104 105 #include <machine/cpu.h> 106 107 #include <uvm/uvm_extern.h> 108 #include <uvm/uvm_map.h> 109 110 #include <miscfs/specfs/specdev.h> 111 112 #include "ite.h" 113 #if NITE == 0 114 #define iteon(u,f) 0 115 #define iteoff(u,f) 116 #define ite_reinit(u) 117 #endif 118 119 #ifdef DEBUG 120 int grfdebug = 0; 121 #define GDB_DEVNO 0x01 122 #define GDB_MMAP 0x02 123 #define GDB_IOMAP 0x04 124 #define GDB_LOCK 0x08 125 #endif 126 127 static int grfon(struct grf_softc *); 128 static int grfoff(struct grf_softc *); 129 static off_t grfaddr(struct grf_softc *, off_t); 130 static int grfmap(dev_t, void **, struct proc *); 131 static int grfunmap(dev_t, void *, struct proc *); 132 133 extern struct cfdriver grf_cd; 134 135 dev_type_open(grfopen); 136 dev_type_close(grfclose); 137 dev_type_ioctl(grfioctl); 138 dev_type_mmap(grfmmap); 139 140 const struct cdevsw grf_cdevsw = { 141 grfopen, grfclose, nullread, nullwrite, grfioctl, 142 nostop, notty, nopoll, grfmmap, nokqfilter, 143 }; 144 145 /*ARGSUSED*/ 146 int 147 grfopen(dev_t dev, int flags, int mode, struct lwp *l) 148 { 149 struct grf_softc *gp; 150 int error = 0; 151 152 gp = device_lookup_private(&grf_cd, GRFUNIT(dev)); 153 if (gp == NULL) 154 return ENXIO; 155 156 if ((gp->g_flags & GF_ALIVE) == 0) 157 return ENXIO; 158 159 if ((gp->g_flags & (GF_OPEN|GF_EXCLUDE)) == (GF_OPEN|GF_EXCLUDE)) 160 return EBUSY; 161 162 /* 163 * First open. 164 * XXX: always put in graphics mode. 165 */ 166 error = 0; 167 if ((gp->g_flags & GF_OPEN) == 0) { 168 gp->g_flags |= GF_OPEN; 169 error = grfon(gp); 170 } 171 return error; 172 } 173 174 /*ARGSUSED*/ 175 int 176 grfclose(dev_t dev, int flags, int mode, struct lwp *l) 177 { 178 struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev)); 179 180 if ((gp->g_flags & GF_ALIVE) == 0) 181 return ENXIO; 182 183 (void) grfoff(gp); 184 gp->g_flags &= GF_ALIVE; 185 186 return 0; 187 } 188 189 /*ARGSUSED*/ 190 int 191 grfioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 192 { 193 int unit = GRFUNIT(dev); 194 struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev)); 195 int error; 196 197 if ((gp->g_flags & GF_ALIVE) == 0) 198 return ENXIO; 199 200 error = 0; 201 switch (cmd) { 202 203 case GRFIOCGINFO: 204 memcpy(data, (void *)&gp->g_display, sizeof(struct grfinfo)); 205 break; 206 207 case GRFIOCON: 208 error = grfon(gp); 209 break; 210 211 case GRFIOCOFF: 212 error = grfoff(gp); 213 break; 214 215 case GRFIOCMAP: 216 error = grfmap(dev, (void **)data, l->l_proc); 217 break; 218 219 case GRFIOCUNMAP: 220 error = grfunmap(dev, *(void **)data, l->l_proc); 221 break; 222 223 case GRFSETVMODE: 224 error = (*gp->g_sw->gd_mode)(gp, GM_GRFSETVMODE, data); 225 if (error == 0) 226 ite_reinit(unit); 227 break; 228 229 default: 230 error = EINVAL; 231 break; 232 233 } 234 return error; 235 } 236 237 /*ARGSUSED*/ 238 paddr_t 239 grfmmap(dev_t dev, off_t off, int prot) 240 { 241 242 return grfaddr(device_lookup_private(&grf_cd, GRFUNIT(dev)), off); 243 } 244 245 int 246 grfon(struct grf_softc *gp) 247 { 248 int unit = device_unit(gp->g_device); 249 250 /* 251 * XXX: iteoff call relies on devices being in same order 252 * as ITEs and the fact that iteoff only uses the minor part 253 * of the dev arg. 254 */ 255 iteoff(unit, 2); 256 257 return (*gp->g_sw->gd_mode)(gp, GM_GRFON, (void *) 0); 258 } 259 260 int 261 grfoff(struct grf_softc *gp) 262 { 263 int unit = device_unit(gp->g_device); 264 int error; 265 266 #if 0 /* always fails in EINVAL... */ 267 (void) grfunmap(dev, (void *) 0, curproc); 268 #endif 269 error = (*gp->g_sw->gd_mode)(gp, GM_GRFOFF, (void *) 0); 270 /* XXX: see comment for iteoff above */ 271 iteon(unit, 2); 272 273 return error; 274 } 275 276 off_t 277 grfaddr(struct grf_softc *gp, off_t off) 278 { 279 struct grfinfo *gi = &gp->g_display; 280 281 /* control registers */ 282 if (off >= 0 && off < gi->gd_regsize) 283 return ((u_int)gi->gd_regaddr + off) >> PGSHIFT; 284 285 /* frame buffer */ 286 if (off >= gi->gd_regsize && off < gi->gd_regsize+gi->gd_fbsize) { 287 off -= gi->gd_regsize; 288 return ((u_int)gi->gd_fbaddr + off) >> PGSHIFT; 289 } 290 /* bogus */ 291 return -1; 292 } 293 294 int 295 grfmap(dev_t dev, void **addrp, struct proc *p) 296 { 297 struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev)); 298 int len, error; 299 struct vnode vn; 300 int flags; 301 302 #ifdef DEBUG 303 if (grfdebug & GDB_MMAP) 304 printf("grfmap(%d): addr %p\n", p->p_pid, *addrp); 305 #endif 306 307 len = gp->g_display.gd_regsize + gp->g_display.gd_fbsize; 308 flags = MAP_SHARED; 309 if (*addrp) 310 flags |= MAP_FIXED; 311 else 312 *addrp = 313 (void *)VM_DEFAULT_ADDRESS(p->p_vmspace->vm_daddr, len); 314 vn.v_type = VCHR; /* XXX */ 315 vn.v_rdev = dev; /* XXX */ 316 error = uvm_mmap(&p->p_vmspace->vm_map, (vaddr_t *)addrp, 317 (vsize_t)len, VM_PROT_ALL, VM_PROT_ALL, 318 flags, (void *)&vn, 0, 319 p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); 320 if (error == 0) 321 (void) (*gp->g_sw->gd_mode)(gp, GM_MAP, *addrp); 322 323 return error; 324 } 325 326 int 327 grfunmap(dev_t dev, void *addr, struct proc *p) 328 { 329 struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev)); 330 vsize_t size; 331 332 #ifdef DEBUG 333 if (grfdebug & GDB_MMAP) 334 printf("grfunmap(%d): dev %x addr %p\n", p->p_pid, dev, addr); 335 #endif 336 if (addr == 0) 337 return EINVAL; /* XXX: how do we deal with this? */ 338 (void) (*gp->g_sw->gd_mode)(gp, GM_UNMAP, 0); 339 size = round_page(gp->g_display.gd_regsize + gp->g_display.gd_fbsize); 340 uvm_unmap(&p->p_vmspace->vm_map, (vaddr_t)addr, 341 (vaddr_t)addr + size); 342 343 return 0; 344 } 345
Indexes created Wed Sep 24 15:09:51 GMT 2025