1 /* $NetBSD: grf_compat.c,v 1.29 2019/11/10 21:16:29 chs 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 1.29 2019/11/10 21:16:29 chs 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/proc.h> 47 #include <sys/resourcevar.h> 48 49 #include <machine/bus.h> 50 #include <machine/grfioctl.h> 51 52 #include <mac68k/nubus/nubus.h> 53 #include <mac68k/dev/grfvar.h> 54 #include <mac68k/dev/macfbvar.h> 55 56 #include <miscfs/specfs/specdev.h> 57 58 #include <uvm/uvm_extern.h> 59 60 #include "ioconf.h" 61 62 dev_type_open(grfopen); 63 dev_type_close(grfclose); 64 dev_type_ioctl(grfioctl); 65 dev_type_mmap(grfmmap); 66 67 const struct cdevsw grf_cdevsw = { 68 .d_open = grfopen, 69 .d_close = grfclose, 70 .d_read = noread, 71 .d_write = nowrite, 72 .d_ioctl = grfioctl, 73 .d_stop = nostop, 74 .d_tty = notty, 75 .d_poll = nopoll, 76 .d_mmap = grfmmap, 77 .d_kqfilter = nokqfilter, 78 .d_discard = nodiscard, 79 .d_flag = 0 80 }; 81 82 void grf_scinit(struct grf_softc *, const char *, int); 83 void grf_init(int); 84 int grfmap(dev_t, struct macfb_softc *, void **, struct proc *); 85 int grfunmap(dev_t, struct macfb_softc *, void *, struct proc *); 86 87 /* Non-private for the benefit of libkvm. */ 88 struct grf_softc *grf_softc; 89 int numgrf = 0; 90 91 /* 92 * Initialize a softc to sane defaults. 93 */ 94 void 95 grf_scinit(struct grf_softc *sc, const char *name, int unit) 96 { 97 memset(sc, 0, sizeof(struct grf_softc)); 98 snprintf(sc->sc_xname, sizeof(sc->sc_xname), "%s%d", name, unit); 99 sc->mfb_sc = NULL; 100 } 101 102 /* 103 * (Re-)initialize the grf_softc block so that at least the requested 104 * number of elements has been allocated. If this results in more 105 * elements than we had prior to getting here, we initialize each of 106 * them to avoid problems down the road. 107 */ 108 void 109 grf_init(int n) 110 { 111 struct grf_softc *sc; 112 int i; 113 114 if (n >= numgrf) { 115 i = numgrf; 116 numgrf = n + 1; 117 118 if (grf_softc == NULL) 119 sc = (struct grf_softc *) 120 malloc(numgrf * sizeof(*sc), 121 M_DEVBUF, M_WAITOK); 122 else 123 sc = (struct grf_softc *) 124 realloc(grf_softc, numgrf * sizeof(*sc), 125 M_DEVBUF, M_WAITOK); 126 grf_softc = sc; 127 128 /* Initialize per-softc structures. */ 129 while (i < numgrf) { 130 grf_scinit(&grf_softc[i], "grf", i); 131 i++; 132 } 133 } 134 } 135 136 /* 137 * Called by main() during pseudo-device attachment. If we had a 138 * way to configure additional grf devices later, this would actually 139 * allocate enough space for them. As it stands, it's nonsensical, 140 * so other than a basic sanity check we do nothing. 141 */ 142 void 143 grfattach(int n) 144 { 145 if (n <= 0) { 146 #ifdef DIAGNOSTIC 147 panic("grfattach: count <= 0"); 148 #endif 149 return; 150 } 151 152 #if 0 /* XXX someday, if we implement a way to attach after autoconfig */ 153 grf_init(n); 154 #endif 155 } 156 157 /* 158 * Called from macfb_attach() after setting up the frame buffer. Since 159 * there is a 1:1 correspondence between the macfb device and the grf 160 * device, the only bit of information we really need is the macfb_softc. 161 */ 162 void 163 grf_attach(struct macfb_softc *sc, int unit) 164 { 165 166 grf_init(unit); 167 if (unit < numgrf) 168 grf_softc[unit].mfb_sc = sc; 169 } 170 171 /* 172 * Standard device ops 173 */ 174 int 175 grfopen(dev_t dev, int flag, int mode, struct lwp *l) 176 { 177 struct grf_softc *sc; 178 int unit = GRFUNIT(dev); 179 int rv = 0; 180 181 if (grf_softc == NULL || unit >= numgrf) 182 return ENXIO; 183 184 sc = &grf_softc[unit]; 185 if (sc->mfb_sc == NULL) 186 rv = ENXIO; 187 188 return rv; 189 } 190 191 int 192 grfclose(dev_t dev, int flag, int mode, struct lwp *l) 193 { 194 struct grf_softc *sc; 195 int unit = GRFUNIT(dev); 196 int rv = 0; 197 198 if (grf_softc == NULL || unit >= numgrf) 199 return ENXIO; 200 201 sc = &grf_softc[unit]; 202 if (sc->mfb_sc != NULL) 203 macfb_clear(sc->mfb_sc->sc_dc); /* clear the display */ 204 else 205 rv = ENXIO; 206 207 return rv; 208 } 209 210 int 211 grfioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 212 { 213 struct grf_softc *sc; 214 struct macfb_devconfig *dc; 215 #if defined(GRF_COMPAT) || (NGRF > 0) 216 struct grfinfo *gd; 217 #endif /* GRF_COMPAT || (NGRF > 0) */ 218 struct grfmode *gm; 219 int unit = GRFUNIT(dev); 220 int rv; 221 222 if (grf_softc == NULL || unit >= numgrf) 223 return ENXIO; 224 225 sc = &grf_softc[unit]; 226 if (sc->mfb_sc == NULL) 227 return ENXIO; 228 229 dc = sc->mfb_sc->sc_dc; 230 231 switch (cmd) { 232 #if defined(GRF_COMPAT) || (NGRF > 0) 233 case GRFIOCGINFO: 234 gd = (struct grfinfo *)data; 235 memset(gd, 0, sizeof(struct grfinfo)); 236 gd->gd_fbaddr = (void *)dc->dc_paddr; 237 gd->gd_fbsize = dc->dc_size; 238 gd->gd_colors = (short)(1 << dc->dc_depth); 239 gd->gd_planes = (short)dc->dc_depth; 240 gd->gd_fbwidth = dc->dc_wid; 241 gd->gd_fbheight = dc->dc_ht; 242 gd->gd_fbrowbytes = dc->dc_rowbytes; 243 gd->gd_dwidth = dc->dc_raster.width; 244 gd->gd_dheight = dc->dc_raster.height; 245 rv = 0; 246 break; 247 #endif /* GRF_COMPAT || (NGRF > 0) */ 248 249 case GRFIOCON: 250 case GRFIOCOFF: 251 /* Nothing to do */ 252 rv = 0; 253 break; 254 255 #if defined(GRF_COMPAT) || (NGRF > 0) 256 case GRFIOCMAP: 257 rv = grfmap(dev, sc->mfb_sc, (void **)data, l->l_proc); 258 break; 259 260 case GRFIOCUNMAP: 261 rv = grfunmap(dev, sc->mfb_sc, *(void **)data, l->l_proc); 262 break; 263 #endif /* GRF_COMPAT || (NGRF > 0) */ 264 265 case GRFIOCGMODE: 266 gm = (struct grfmode *)data; 267 memset(gm, 0, sizeof(struct grfmode)); 268 gm->fbbase = (char *)dc->dc_vaddr; 269 gm->fbsize = dc->dc_size; 270 gm->fboff = dc->dc_offset; 271 gm->rowbytes = dc->dc_rowbytes; 272 gm->width = dc->dc_wid; 273 gm->height = dc->dc_ht; 274 gm->psize = dc->dc_depth; 275 rv = 0; 276 break; 277 278 case GRFIOCLISTMODES: 279 case GRFIOCGETMODE: 280 case GRFIOCSETMODE: 281 /* NONE of these operations are (officially) supported. */ 282 default: 283 rv = EINVAL; 284 break; 285 } 286 return rv; 287 } 288 289 paddr_t 290 grfmmap(dev_t dev, off_t off, int prot) 291 { 292 struct grf_softc *sc; 293 struct macfb_devconfig *dc; 294 int unit = GRFUNIT(dev); 295 296 if (grf_softc == NULL || unit >= numgrf) 297 return ENXIO; 298 299 sc = &grf_softc[unit]; 300 if (sc->mfb_sc == NULL) 301 return ENXIO; 302 303 dc = sc->mfb_sc->sc_dc; 304 305 if ((u_int)off < m68k_round_page(dc->dc_offset + dc->dc_size)) 306 return m68k_btop(dc->dc_paddr + off); 307 308 return (-1); 309 } 310 311 int 312 grfmap(dev_t dev, struct macfb_softc *sc, void **addrp, struct proc *p) 313 { 314 size_t len; 315 int error; 316 317 len = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size); 318 error = uvm_mmap_dev(p, addrp, len, dev, 0); 319 320 /* Offset into page: */ 321 *addrp = (char *)*addrp + sc->sc_dc->dc_offset; 322 323 return (error); 324 } 325 326 int 327 grfunmap(dev_t dev, struct macfb_softc *sc, void *addr, struct proc *p) 328 { 329 size_t size; 330 331 addr = (char *)addr - sc->sc_dc->dc_offset; 332 333 if (addr <= 0) 334 return (-1); 335 336 size = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size); 337 uvm_unmap(&p->p_vmspace->vm_map, (vaddr_t)addr, (vaddr_t)addr + size); 338 return 0; 339 } 340
Indexes created Sun Sep 21 20:09:37 GMT 2025