grf_compat.c revision 1.25
1 /* $NetBSD: grf_compat.c,v 1.25 2014/03/16 05:20:24 dholland 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 "opt_grf_compat.h" 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: grf_compat.c,v 1.25 2014/03/16 05:20:24 dholland Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/conf.h> 42 #include <sys/device.h> 43 #include <sys/errno.h> 44 #include <sys/ioctl.h> 45 #include <sys/malloc.h> 46 #include <sys/mman.h> 47 #include <sys/proc.h> 48 #include <sys/resourcevar.h> 49 #include <sys/vnode.h> 50 51 #include <machine/autoconf.h> 52 #include <machine/bus.h> 53 #include <machine/grfioctl.h> 54 55 #include <mac68k/nubus/nubus.h> 56 #include <mac68k/dev/grfvar.h> 57 #include <mac68k/dev/macfbvar.h> 58 59 #include <miscfs/specfs/specdev.h> 60 61 #include <uvm/uvm_extern.h> 62 #include <uvm/uvm_map.h> 63 64 dev_type_open(grfopen); 65 dev_type_close(grfclose); 66 dev_type_ioctl(grfioctl); 67 dev_type_mmap(grfmmap); 68 69 const struct cdevsw grf_cdevsw = { 70 .d_open = grfopen, 71 .d_close = grfclose, 72 .d_read = noread, 73 .d_write = nowrite, 74 .d_ioctl = grfioctl, 75 .d_stop = nostop, 76 .d_tty = notty, 77 .d_poll = nopoll, 78 .d_mmap = grfmmap, 79 .d_kqfilter = nokqfilter, 80 .d_flag = 0 81 }; 82 83 void grf_scinit(struct grf_softc *, const char *, int); 84 void grf_init(int); 85 void grfattach(int); 86 int grfmap(dev_t, struct macfb_softc *, void **, struct proc *); 87 int grfunmap(dev_t, struct macfb_softc *, void *, struct proc *); 88 89 /* Non-private for the benefit of libkvm. */ 90 struct grf_softc *grf_softc; 91 int numgrf = 0; 92 93 /* 94 * Initialize a softc to sane defaults. 95 */ 96 void 97 grf_scinit(struct grf_softc *sc, const char *name, int unit) 98 { 99 memset(sc, 0, sizeof(struct grf_softc)); 100 snprintf(sc->sc_xname, sizeof(sc->sc_xname), "%s%d", name, unit); 101 sc->mfb_sc = NULL; 102 } 103 104 /* 105 * (Re-)initialize the grf_softc block so that at least the requested 106 * number of elements has been allocated. If this results in more 107 * elements than we had prior to getting here, we initialize each of 108 * them to avoid problems down the road. 109 */ 110 void 111 grf_init(int n) 112 { 113 struct grf_softc *sc; 114 int i; 115 116 if (n >= numgrf) { 117 i = numgrf; 118 numgrf = n + 1; 119 120 if (grf_softc == NULL) 121 sc = (struct grf_softc *) 122 malloc(numgrf * sizeof(*sc), 123 M_DEVBUF, M_NOWAIT); 124 else 125 sc = (struct grf_softc *) 126 realloc(grf_softc, numgrf * sizeof(*sc), 127 M_DEVBUF, M_NOWAIT); 128 if (sc == NULL) { 129 printf("WARNING: no memory for grf emulation\n"); 130 if (grf_softc != NULL) 131 free(grf_softc, M_DEVBUF); 132 return; 133 } 134 grf_softc = sc; 135 136 /* Initialize per-softc structures. */ 137 while (i < numgrf) { 138 grf_scinit(&grf_softc[i], "grf", i); 139 i++; 140 } 141 } 142 } 143 144 /* 145 * Called by main() during pseudo-device attachment. If we had a 146 * way to configure additional grf devices later, this would actually 147 * allocate enough space for them. As it stands, it's nonsensical, 148 * so other than a basic sanity check we do nothing. 149 */ 150 void 151 grfattach(int n) 152 { 153 if (n <= 0) { 154 #ifdef DIAGNOSTIC 155 panic("grfattach: count <= 0"); 156 #endif 157 return; 158 } 159 160 #if 0 /* XXX someday, if we implement a way to attach after autoconfig */ 161 grf_init(n); 162 #endif 163 } 164 165 /* 166 * Called from macfb_attach() after setting up the frame buffer. Since 167 * there is a 1:1 correspondence between the macfb device and the grf 168 * device, the only bit of information we really need is the macfb_softc. 169 */ 170 void 171 grf_attach(struct macfb_softc *sc, int unit) 172 { 173 174 grf_init(unit); 175 if (unit < numgrf) 176 grf_softc[unit].mfb_sc = sc; 177 } 178 179 /* 180 * Standard device ops 181 */ 182 int 183 grfopen(dev_t dev, int flag, int mode, struct lwp *l) 184 { 185 struct grf_softc *sc; 186 int unit = GRFUNIT(dev); 187 int rv = 0; 188 189 if (grf_softc == NULL || unit >= numgrf) 190 return ENXIO; 191 192 sc = &grf_softc[unit]; 193 if (sc->mfb_sc == NULL) 194 rv = ENXIO; 195 196 return rv; 197 } 198 199 int 200 grfclose(dev_t dev, int flag, int mode, struct lwp *l) 201 { 202 struct grf_softc *sc; 203 int unit = GRFUNIT(dev); 204 int rv = 0; 205 206 if (grf_softc == NULL || unit >= numgrf) 207 return ENXIO; 208 209 sc = &grf_softc[unit]; 210 if (sc->mfb_sc != NULL) 211 macfb_clear(sc->mfb_sc->sc_dc); /* clear the display */ 212 else 213 rv = ENXIO; 214 215 return rv; 216 } 217 218 int 219 grfioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 220 { 221 struct grf_softc *sc; 222 struct macfb_devconfig *dc; 223 #if defined(GRF_COMPAT) || (NGRF > 0) 224 struct grfinfo *gd; 225 #endif /* GRF_COMPAT || (NGRF > 0) */ 226 struct grfmode *gm; 227 int unit = GRFUNIT(dev); 228 int rv; 229 230 if (grf_softc == NULL || unit >= numgrf) 231 return ENXIO; 232 233 sc = &grf_softc[unit]; 234 if (sc->mfb_sc == NULL) 235 return ENXIO; 236 237 dc = sc->mfb_sc->sc_dc; 238 239 switch (cmd) { 240 #if defined(GRF_COMPAT) || (NGRF > 0) 241 case GRFIOCGINFO: 242 gd = (struct grfinfo *)data; 243 memset(gd, 0, sizeof(struct grfinfo)); 244 gd->gd_fbaddr = (void *)dc->dc_paddr; 245 gd->gd_fbsize = dc->dc_size; 246 gd->gd_colors = (short)(1 << dc->dc_depth); 247 gd->gd_planes = (short)dc->dc_depth; 248 gd->gd_fbwidth = dc->dc_wid; 249 gd->gd_fbheight = dc->dc_ht; 250 gd->gd_fbrowbytes = dc->dc_rowbytes; 251 gd->gd_dwidth = dc->dc_raster.width; 252 gd->gd_dheight = dc->dc_raster.height; 253 rv = 0; 254 break; 255 #endif /* GRF_COMPAT || (NGRF > 0) */ 256 257 case GRFIOCON: 258 case GRFIOCOFF: 259 /* Nothing to do */ 260 rv = 0; 261 break; 262 263 #if defined(GRF_COMPAT) || (NGRF > 0) 264 case GRFIOCMAP: 265 rv = grfmap(dev, sc->mfb_sc, (void **)data, l->l_proc); 266 break; 267 268 case GRFIOCUNMAP: 269 rv = grfunmap(dev, sc->mfb_sc, *(void **)data, l->l_proc); 270 break; 271 #endif /* GRF_COMPAT || (NGRF > 0) */ 272 273 case GRFIOCGMODE: 274 gm = (struct grfmode *)data; 275 memset(gm, 0, sizeof(struct grfmode)); 276 gm->fbbase = (char *)dc->dc_vaddr; 277 gm->fbsize = dc->dc_size; 278 gm->fboff = dc->dc_offset; 279 gm->rowbytes = dc->dc_rowbytes; 280 gm->width = dc->dc_wid; 281 gm->height = dc->dc_ht; 282 gm->psize = dc->dc_depth; 283 rv = 0; 284 break; 285 286 case GRFIOCLISTMODES: 287 case GRFIOCGETMODE: 288 case GRFIOCSETMODE: 289 /* NONE of these operations are (officially) supported. */ 290 default: 291 rv = EINVAL; 292 break; 293 } 294 return rv; 295 } 296 297 paddr_t 298 grfmmap(dev_t dev, off_t off, int prot) 299 { 300 struct grf_softc *sc; 301 struct macfb_devconfig *dc; 302 int unit = GRFUNIT(dev); 303 304 if (grf_softc == NULL || unit >= numgrf) 305 return ENXIO; 306 307 sc = &grf_softc[unit]; 308 if (sc->mfb_sc == NULL) 309 return ENXIO; 310 311 dc = sc->mfb_sc->sc_dc; 312 313 if ((u_int)off < m68k_round_page(dc->dc_offset + dc->dc_size)) 314 return m68k_btop(dc->dc_paddr + off); 315 316 return (-1); 317 } 318 319 int 320 grfmap(dev_t dev, struct macfb_softc *sc, void **addrp, struct proc *p) 321 { 322 struct vnode vn; 323 u_long len; 324 int error, flags; 325 326 len = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size); 327 *addrp = (void *)p->p_emul->e_vm_default_addr(p, 328 (vaddr_t)p->p_vmspace->vm_daddr, len); 329 flags = MAP_SHARED | MAP_FIXED; 330 331 vn.v_type = VCHR; /* XXX */ 332 vn.v_rdev = dev; /* XXX */ 333 334 error = uvm_mmap(&p->p_vmspace->vm_map, (vaddr_t *)addrp, 335 (vsize_t)len, VM_PROT_ALL, VM_PROT_ALL, 336 flags, (void *)&vn, 0, p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); 337 338 /* Offset into page: */ 339 *addrp = (char*)*addrp + sc->sc_dc->dc_offset; 340 341 return (error); 342 } 343 344 int 345 grfunmap(dev_t dev, struct macfb_softc *sc, void *addr, struct proc *p) 346 { 347 vm_size_t size; 348 349 addr = (char*)addr - sc->sc_dc->dc_offset; 350 351 if (addr <= 0) 352 return (-1); 353 354 size = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size); 355 uvm_unmap(&p->p_vmspace->vm_map, (vaddr_t)addr, (vaddr_t)addr + size); 356 return 0; 357 } 358
Indexes created Thu Oct 02 14:10:14 GMT 2025