grf_compat.c revision 1.1.2.2
1 /* $NetBSD: grf_compat.c,v 1.1.2.2 1999/11/17 08:11:54 scottr Exp $ */ 2 3 /* 4 * Copyright (C) 1999 Scott Reynolds 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 /* 31 * macfb compatibility with legacy grf devices 32 */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/cdefs.h> 37 #include <sys/conf.h> 38 #include <sys/device.h> 39 #include <sys/errno.h> 40 #include <sys/ioctl.h> 41 #include <sys/malloc.h> 42 #include <sys/mman.h> 43 #include <sys/proc.h> 44 #include <sys/resourcevar.h> 45 #include <sys/vnode.h> 46 47 #include <machine/autoconf.h> 48 #include <machine/bus.h> 49 #include <machine/grfioctl.h> 50 51 #include <mac68k/nubus/nubus.h> 52 #include <mac68k/dev/grfvar.h> 53 #include <mac68k/dev/macfbvar.h> 54 55 #include <miscfs/specfs/specdev.h> 56 57 #include <vm/vm.h> 58 #include <uvm/uvm_extern.h> 59 #include <uvm/uvm_map.h> 60 61 cdev_decl(grf); 62 63 void grf_scinit __P((struct grf_softc *, const char *, int)); 64 void grf_init __P((int)); 65 void grfattach __P((int)); 66 int grfmap __P((dev_t, struct macfb_softc *, caddr_t *, struct proc *)); 67 int grfunmap __P((dev_t, struct macfb_softc *, caddr_t, struct proc *)); 68 69 /* Non-private for the benefit of libkvm. */ 70 struct grf_softc *grf_softc; 71 int numgrf = 0; 72 73 /* 74 * Initialize a softc to sane defaults. 75 */ 76 void 77 grf_scinit(sc, name, unit) 78 struct grf_softc *sc; 79 const char *name; 80 int unit; 81 { 82 memset(sc, 0, sizeof(struct grf_softc)); 83 snprintf(sc->sc_xname, sizeof(sc->sc_xname), "%s%d", name, unit); 84 sc->mfb_sc = NULL; 85 } 86 87 /* 88 * (Re-)initialize the grf_softc block so that at least the requested 89 * number of elements has been allocated. If this results in more 90 * elements than we had prior to getting here, we initialize each of 91 * them to avoid problems down the road. 92 */ 93 void 94 grf_init(n) 95 int n; 96 { 97 struct grf_softc *sc; 98 int i; 99 100 if (n >= numgrf) { 101 i = numgrf; 102 numgrf = n + 1; 103 104 if (grf_softc == NULL) 105 sc = (struct grf_softc *) 106 malloc(numgrf * sizeof(*sc), 107 M_DEVBUF, M_NOWAIT); 108 else 109 sc = (struct grf_softc *) 110 realloc(grf_softc, numgrf * sizeof(*sc), 111 M_DEVBUF, M_NOWAIT); 112 if (sc == NULL) { 113 printf("WARNING: no memory for grf emulation\n"); 114 if (grf_softc != NULL) 115 free(grf_softc, M_DEVBUF); 116 return; 117 } 118 grf_softc = sc; 119 120 /* Initialize per-softc structures. */ 121 while (i < numgrf) { 122 grf_scinit(&grf_softc[i], "grf", i); 123 i++; 124 } 125 } 126 } 127 128 /* 129 * Called by main() during pseudo-device attachment. If we had a 130 * way to configure additional grf devices later, this would actually 131 * allocate enough space for them. As it stands, it's nonsensical, 132 * so other than a basic sanity check we do nothing. 133 */ 134 void 135 grfattach(n) 136 int n; 137 { 138 if (n <= 0) { 139 #ifdef DIAGNOSTIC 140 panic("grfattach: count <= 0"); 141 #endif 142 return; 143 } 144 145 #if 0 /* XXX someday, if we implement a way to attach after autoconfig */ 146 grf_init(n); 147 #endif 148 } 149 150 /* 151 * Called from macfb_attach() after setting up the frame buffer. Since 152 * there is a 1:1 correspondence between the macfb device and the grf 153 * device, the only bit of information we really need is the macfb_softc. 154 */ 155 void 156 grf_attach(sc, unit) 157 struct macfb_softc *sc; 158 int unit; 159 { 160 grf_init(unit); 161 162 if (unit < numgrf) 163 grf_softc[unit].mfb_sc = sc; 164 } 165 166 /* 167 * Standard device ops 168 */ 169 int 170 grfopen(dev, flag, mode, p) 171 dev_t dev; 172 int flag; 173 int mode; 174 struct proc *p; 175 { 176 struct grf_softc *sc; 177 int unit = GRFUNIT(dev); 178 int rv = 0; 179 180 if (grf_softc == NULL || unit >= numgrf) 181 return ENXIO; 182 183 sc = &grf_softc[unit]; 184 if (sc->mfb_sc != NULL) 185 sc->sc_isopen++; 186 else 187 rv = ENXIO; 188 189 return rv; 190 } 191 192 int 193 grfclose(dev, flag, mode, p) 194 dev_t dev; 195 int flag; 196 int mode; 197 struct proc *p; 198 { 199 struct grf_softc *sc; 200 int unit = GRFUNIT(dev); 201 int rv = 0; 202 203 if (grf_softc == NULL || unit >= numgrf) 204 return ENXIO; 205 206 sc = &grf_softc[unit]; 207 if (sc->mfb_sc != NULL && sc->sc_isopen) 208 sc->sc_isopen = 0; 209 else 210 rv = ENXIO; 211 212 return rv; 213 } 214 215 int 216 grfread(dev, uio, ioflag) 217 dev_t dev; 218 struct uio *uio; 219 int ioflag; 220 { 221 return ENXIO; 222 } 223 224 int 225 grfwrite(dev, uio, ioflag) 226 dev_t dev; 227 struct uio *uio; 228 int ioflag; 229 { 230 return ENXIO; 231 } 232 233 int 234 grfioctl(dev, cmd, data, flag, p) 235 dev_t dev; 236 u_long cmd; 237 caddr_t data; 238 int flag; 239 struct proc *p; 240 { 241 struct grf_softc *sc; 242 struct macfb_devconfig *dc; 243 struct grfinfo *gd; 244 struct grfmode *gm; 245 int unit = GRFUNIT(dev); 246 int rv; 247 248 if (grf_softc == NULL || unit >= numgrf) 249 return ENXIO; 250 251 sc = &grf_softc[unit]; 252 if (sc->mfb_sc == NULL) 253 return ENXIO; 254 255 dc = sc->mfb_sc->sc_dc; 256 257 switch (cmd) { 258 case GRFIOCGINFO: 259 gd = (struct grfinfo *)data; 260 memset(gd, 0, sizeof(struct grfinfo)); 261 gd->gd_fbaddr = (caddr_t)dc->dc_paddr; 262 gd->gd_fbsize = dc->dc_size; 263 gd->gd_colors = (short)(1 << dc->dc_depth); 264 gd->gd_planes = (short)dc->dc_depth; 265 gd->gd_fbwidth = dc->dc_wid; 266 gd->gd_fbheight = dc->dc_ht; 267 gd->gd_fbrowbytes = dc->dc_rowbytes; 268 gd->gd_dwidth = dc->dc_raster.width; 269 gd->gd_dheight = dc->dc_raster.height; 270 rv = 0; 271 break; 272 273 case GRFIOCON: 274 case GRFIOCOFF: 275 /* Nothing to do */ 276 rv = 0; 277 break; 278 279 case GRFIOCMAP: 280 rv = grfmap(dev, sc->mfb_sc, (caddr_t *)data, p); 281 break; 282 283 case GRFIOCUNMAP: 284 rv = grfunmap(dev, sc->mfb_sc, *(caddr_t *)data, p); 285 break; 286 287 case GRFIOCGMODE: 288 gm = (struct grfmode *)data; 289 memset(gm, 0, sizeof(struct grfmode)); 290 gm->fbbase = (char *)dc->dc_vaddr; 291 gm->fbsize = dc->dc_size; 292 gm->fboff = dc->dc_offset; 293 gm->rowbytes = dc->dc_rowbytes; 294 gm->width = dc->dc_wid; 295 gm->height = dc->dc_ht; 296 gm->psize = dc->dc_depth; 297 rv = 0; 298 break; 299 300 case GRFIOCLISTMODES: 301 case GRFIOCGETMODE: 302 case GRFIOCSETMODE: 303 /* NONE of these operations are (or ever were) supported. */ 304 rv = ENOTTY; 305 break; 306 307 default: 308 rv = (-1); 309 break; 310 } 311 return rv; 312 } 313 314 int 315 grfpoll(dev, events, p) 316 dev_t dev; 317 int events; 318 struct proc *p; 319 { 320 return EINVAL; 321 } 322 323 int 324 grfmmap(dev, off, prot) 325 dev_t dev; 326 int off; 327 int prot; 328 { 329 struct grf_softc *sc; 330 struct macfb_devconfig *dc; 331 u_long addr; 332 int unit = GRFUNIT(dev); 333 334 if (grf_softc == NULL || unit >= numgrf) 335 return ENXIO; 336 337 sc = &grf_softc[unit]; 338 if (sc->mfb_sc == NULL || !sc->sc_isopen) 339 return ENXIO; 340 341 dc = sc->mfb_sc->sc_dc; 342 343 if (off >= 0 && 344 off < m68k_round_page(dc->dc_offset + dc->dc_size)) 345 addr = m68k_btop(dc->dc_paddr + dc->dc_offset + off); 346 else 347 addr = (-1); /* XXX bogus */ 348 349 return (int)addr; 350 } 351 352 int 353 grfmap(dev, sc, addrp, p) 354 dev_t dev; 355 struct macfb_softc *sc; 356 caddr_t *addrp; 357 struct proc *p; 358 { 359 struct specinfo si; 360 struct vnode vn; 361 u_long len; 362 int error, flags; 363 364 *addrp = (caddr_t)sc->sc_dc->dc_paddr; 365 len = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size); 366 flags = MAP_SHARED; 367 368 vn.v_type = VCHR; /* XXX */ 369 vn.v_specinfo = &si; /* XXX */ 370 vn.v_rdev = dev; /* XXX */ 371 372 error = uvm_mmap(&p->p_vmspace->vm_map, (vaddr_t *)addrp, 373 (vsize_t)len, VM_PROT_ALL, VM_PROT_ALL, 374 flags, (caddr_t)&vn, 0, p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); 375 376 /* Offset into page: */ 377 *addrp += sc->sc_dc->dc_offset; 378 379 return (error); 380 } 381 382 int 383 grfunmap(dev, sc, addr, p) 384 dev_t dev; 385 struct macfb_softc *sc; 386 caddr_t addr; 387 struct proc *p; 388 { 389 vm_size_t size; 390 int rv; 391 392 addr -= sc->sc_dc->dc_offset; 393 394 if (addr <= 0) 395 return (-1); 396 397 size = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size); 398 399 rv = uvm_unmap(&p->p_vmspace->vm_map, (vaddr_t)addr, 400 (vaddr_t)addr + size); 401 402 return (rv == KERN_SUCCESS ? 0 : EINVAL); 403 } 404
Indexes created Thu Oct 02 14:10:14 GMT 2025