1 /* $NetBSD: ofb.c,v 1.72 2021/08/07 16:18:57 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie the 27 * rights to redistribute these changes. 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: ofb.c,v 1.72 2021/08/07 16:18:57 thorpej Exp $"); 32 33 #include <sys/param.h> 34 #include <sys/buf.h> 35 #include <sys/conf.h> 36 #include <sys/device.h> 37 #include <sys/ioctl.h> 38 #include <sys/kernel.h> 39 #include <sys/malloc.h> 40 #include <sys/systm.h> 41 #include <sys/kauth.h> 42 #include <sys/lwp.h> 43 44 #include <dev/pci/pcidevs.h> 45 #include <dev/pci/pcireg.h> 46 #include <dev/pci/pcivar.h> 47 #include <dev/pci/pciio.h> 48 49 #include <dev/wscons/wsconsio.h> 50 #include <dev/wscons/wsdisplayvar.h> 51 #include <dev/rasops/rasops.h> 52 #include <dev/wsfont/wsfont.h> 53 54 #include <dev/ofw/openfirm.h> 55 #include <dev/ofw/ofw_pci.h> 56 57 #include <sys/bus.h> 58 #include <machine/autoconf.h> 59 #include <machine/grfioctl.h> 60 61 #include <dev/wscons/wsdisplay_vconsvar.h> 62 63 #include <powerpc/oea/ofw_rasconsvar.h> 64 65 struct ofb_softc { 66 device_t sc_dev; 67 68 pci_chipset_tag_t sc_pc; 69 pcitag_t sc_pcitag; 70 bus_space_tag_t sc_memt; 71 bus_space_tag_t sc_iot; 72 73 u_int32_t sc_addrs[30]; /* "assigned-addresses" storage */ 74 u_char sc_cmap_red[256]; 75 u_char sc_cmap_green[256]; 76 u_char sc_cmap_blue[256]; 77 78 int sc_node, sc_ih, sc_mode; 79 paddr_t sc_fbaddr; 80 uint32_t sc_fbsize; 81 82 struct vcons_data vd; 83 }; 84 85 static int ofbmatch(device_t, cfdata_t, void *); 86 static void ofbattach(device_t, device_t, void *); 87 88 CFATTACH_DECL_NEW(ofb, sizeof(struct ofb_softc), 89 ofbmatch, ofbattach, NULL, NULL); 90 91 const struct wsscreen_descr *_ofb_scrlist[] = { 92 &rascons_stdscreen, 93 /* XXX other formats, graphics screen? */ 94 }; 95 96 struct wsscreen_list ofb_screenlist = { 97 sizeof(_ofb_scrlist) / sizeof(struct wsscreen_descr *), _ofb_scrlist 98 }; 99 100 static int ofb_ioctl(void *, void *, u_long, void *, int, struct lwp *); 101 static paddr_t ofb_mmap(void *, void *, off_t, int); 102 103 static void ofb_init_screen(void *, struct vcons_screen *, int, long *); 104 105 struct wsdisplay_accessops ofb_accessops = { 106 ofb_ioctl, 107 ofb_mmap, 108 NULL, /* vcons_alloc_screen */ 109 NULL, /* vcons_free_screen */ 110 NULL, /* vcons_show_screen */ 111 NULL /* load_font */ 112 }; 113 114 static void ofb_putpalreg(struct ofb_softc *, int, uint8_t, uint8_t, 115 uint8_t); 116 117 static int ofb_getcmap(struct ofb_softc *, struct wsdisplay_cmap *); 118 static int ofb_putcmap(struct ofb_softc *, struct wsdisplay_cmap *); 119 static void ofb_init_cmap(struct ofb_softc *); 120 static int ofb_drm_print(void *, const char *); 121 122 extern const u_char rasops_cmap[768]; 123 124 extern int console_node; 125 extern int console_instance; 126 127 static int 128 ofbmatch(device_t parent, cfdata_t match, void *aux) 129 { 130 struct pci_attach_args *pa = aux; 131 132 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_APPLE && 133 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_APPLE_CONTROL) 134 return 1; 135 136 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY) 137 return 1; 138 139 return 0; 140 } 141 142 static void 143 ofbattach(device_t parent, device_t self, void *aux) 144 { 145 struct ofb_softc *sc = device_private(self); 146 struct pci_attach_args *pa = aux; 147 struct wsemuldisplaydev_attach_args a; 148 struct rasops_info *ri = &rascons_console_screen.scr_ri; 149 long defattr; 150 int console, node, sub; 151 char devinfo[256]; 152 153 sc->sc_dev = self; 154 155 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 156 printf(": %s\n", devinfo); 157 158 if (console_node == 0) 159 return; 160 161 node = pcidev_to_ofdev(pa->pa_pc, pa->pa_tag); 162 console = (node == console_node); 163 if (!console) { 164 /* check if any of the childs matches */ 165 sub = OF_child(node); 166 while ((sub != 0) && (sub != console_node)) { 167 sub = OF_peer(sub); 168 } 169 if (sub == console_node) { 170 console = true; 171 } 172 } 173 174 sc->sc_memt = pa->pa_memt; 175 sc->sc_iot = pa->pa_iot; 176 sc->sc_pc = pa->pa_pc; 177 sc->sc_pcitag = pa->pa_tag; 178 sc->sc_mode = WSDISPLAYIO_MODE_EMUL; 179 180 if (!console) 181 return; 182 183 vcons_init(&sc->vd, sc, &rascons_stdscreen, &ofb_accessops); 184 sc->vd.init_screen = ofb_init_screen; 185 186 sc->sc_node = console_node; 187 188 sc->sc_ih = console_instance; 189 vcons_init_screen(&sc->vd, &rascons_console_screen, 1, &defattr); 190 rascons_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC; 191 192 printf("%s: %d x %d, %dbpp\n", device_xname(self), 193 ri->ri_width, ri->ri_height, ri->ri_depth); 194 195 sc->sc_fbaddr = 0; 196 if (OF_getprop(sc->sc_node, "address", &sc->sc_fbaddr, 4) != 4) 197 OF_interpret("frame-buffer-adr", 0, 1, &sc->sc_fbaddr); 198 if (sc->sc_fbaddr == 0) { 199 printf("%s: Unable to find the framebuffer address.\n", 200 device_xname(sc->sc_dev)); 201 return; 202 } 203 sc->sc_fbsize = round_page(ri->ri_stride * ri->ri_height); 204 205 /* XXX */ 206 if (OF_getprop(sc->sc_node, "assigned-addresses", sc->sc_addrs, 207 sizeof(sc->sc_addrs)) == -1) { 208 sc->sc_node = OF_parent(sc->sc_node); 209 OF_getprop(sc->sc_node, "assigned-addresses", sc->sc_addrs, 210 sizeof(sc->sc_addrs)); 211 } 212 213 ofb_init_cmap(sc); 214 215 a.console = console; 216 a.scrdata = &ofb_screenlist; 217 a.accessops = &ofb_accessops; 218 a.accesscookie = &sc->vd; 219 220 config_found(self, &a, wsemuldisplaydevprint, 221 CFARGS(.iattr = "wsemuldisplaydev")); 222 223 config_found(self, aux, ofb_drm_print, 224 CFARGS(.iattr = "drm")); 225 } 226 227 static int 228 ofb_drm_print(void *aux, const char *pnp) 229 { 230 if (pnp) 231 aprint_normal("direct rendering for %s", pnp); 232 return (UNSUPP); 233 } 234 235 static void 236 ofb_init_screen(void *cookie, struct vcons_screen *scr, 237 int existing, long *defattr) 238 { 239 struct ofb_softc *sc = cookie; 240 struct rasops_info *ri = &scr->scr_ri; 241 242 if (scr != &rascons_console_screen) { 243 rascons_init_rasops(sc->sc_node, ri); 244 } 245 } 246 247 static int 248 ofb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct lwp *l) 249 { 250 struct vcons_data *vd = v; 251 struct ofb_softc *sc = vd->cookie; 252 struct wsdisplay_fbinfo *wdf; 253 struct vcons_screen *ms = vd->active; 254 struct grfinfo *gm; 255 256 switch (cmd) { 257 case WSDISPLAYIO_GTYPE: 258 *(u_int *)data = WSDISPLAY_TYPE_PCIMISC; /* XXX ? */ 259 return 0; 260 261 case WSDISPLAYIO_GINFO: 262 /* we won't get here without any screen anyway */ 263 if (ms != NULL) { 264 wdf = (void *)data; 265 wdf->height = ms->scr_ri.ri_height; 266 wdf->width = ms->scr_ri.ri_width; 267 wdf->depth = ms->scr_ri.ri_depth; 268 wdf->cmsize = 256; 269 return 0; 270 } else 271 return ENODEV; 272 273 case WSDISPLAYIO_GETCMAP: 274 return ofb_getcmap(sc, (struct wsdisplay_cmap *)data); 275 276 case WSDISPLAYIO_PUTCMAP: 277 return ofb_putcmap(sc, (struct wsdisplay_cmap *)data); 278 279 /* XXX There are no way to know framebuffer pa from a user program. */ 280 case GRFIOCGINFO: 281 if (ms != NULL) { 282 gm = (void *)data; 283 memset(gm, 0, sizeof(struct grfinfo)); 284 gm->gd_fbaddr = (void *)sc->sc_fbaddr; 285 gm->gd_fbrowbytes = ms->scr_ri.ri_stride; 286 return 0; 287 } else 288 return ENODEV; 289 case WSDISPLAYIO_LINEBYTES: 290 { 291 *(int *)data = ms->scr_ri.ri_stride; 292 return 0; 293 } 294 case WSDISPLAYIO_SMODE: 295 { 296 int new_mode = *(int*)data; 297 if (new_mode != sc->sc_mode) 298 { 299 sc->sc_mode = new_mode; 300 if (new_mode == WSDISPLAYIO_MODE_EMUL) 301 { 302 ofb_init_cmap(sc); 303 vcons_redraw_screen(ms); 304 } 305 } 306 } 307 return 0; 308 /* PCI config read/write passthrough. */ 309 case PCI_IOC_CFGREAD: 310 case PCI_IOC_CFGWRITE: 311 return (pci_devioctl(sc->sc_pc, sc->sc_pcitag, 312 cmd, data, flag, l)); 313 } 314 return EPASSTHROUGH; 315 } 316 317 static paddr_t 318 ofb_mmap(void *v, void *vs, off_t offset, int prot) 319 { 320 struct vcons_data *vd = v; 321 struct ofb_softc *sc = vd->cookie; 322 u_int32_t *ap = sc->sc_addrs; 323 int i; 324 325 if (vd->active == NULL) { 326 printf("%s: no active screen.\n", device_xname(sc->sc_dev)); 327 return -1; 328 } 329 330 /* framebuffer at offset 0 */ 331 if ((offset >= 0) && (offset < sc->sc_fbsize)) 332 return bus_space_mmap(sc->sc_memt, sc->sc_fbaddr, offset, prot, 333 BUS_SPACE_MAP_LINEAR); 334 335 /* 336 * restrict all other mappings to processes with superuser privileges 337 * or the kernel itself 338 */ 339 if (kauth_authorize_machdep(kauth_cred_get(), KAUTH_MACHDEP_UNMANAGEDMEM, 340 NULL, NULL, NULL, NULL) != 0) { 341 printf("%s: mmap() rejected.\n", device_xname(sc->sc_dev)); 342 return -1; 343 } 344 345 /* let them mmap() 0xa0000 - 0xbffff if it's not covered above */ 346 #ifdef OFB_FAKE_VGA_FB 347 if (offset >=0xa0000 && offset < 0xbffff) 348 return sc->sc_fbaddr + offset - 0xa0000; 349 #endif 350 351 /* allow to map our IO space */ 352 if ((offset >= 0xf2000000) && (offset < 0xf2800000)) { 353 return bus_space_mmap(sc->sc_iot, offset-0xf2000000, 0, prot, 354 BUS_SPACE_MAP_LINEAR); 355 } 356 357 for (i = 0; i < 6; i++) { 358 switch (ap[0] & OFW_PCI_PHYS_HI_SPACEMASK) { 359 case OFW_PCI_PHYS_HI_SPACE_MEM32: 360 if (offset >= ap[2] && offset < ap[2] + ap[4]) 361 return bus_space_mmap(sc->sc_memt, offset, 0, 362 prot, BUS_SPACE_MAP_LINEAR); 363 } 364 ap += 5; 365 } 366 return -1; 367 } 368 369 static int 370 ofb_getcmap(struct ofb_softc *sc, struct wsdisplay_cmap *cm) 371 { 372 u_int index = cm->index; 373 u_int count = cm->count; 374 int error; 375 376 if (index >= 256 || count > 256 || index + count > 256) 377 return EINVAL; 378 379 error = copyout(&sc->sc_cmap_red[index], cm->red, count); 380 if (error) 381 return error; 382 error = copyout(&sc->sc_cmap_green[index], cm->green, count); 383 if (error) 384 return error; 385 error = copyout(&sc->sc_cmap_blue[index], cm->blue, count); 386 if (error) 387 return error; 388 389 return 0; 390 } 391 392 int 393 ofb_putcmap(struct ofb_softc *sc, struct wsdisplay_cmap *cm) 394 { 395 u_int index = cm->index; 396 u_int count = cm->count; 397 int i, error; 398 u_char rbuf[256], gbuf[256], bbuf[256]; 399 u_char *r, *g, *b; 400 401 if (cm->index >= 256 || cm->count > 256 || 402 (cm->index + cm->count) > 256) 403 return EINVAL; 404 error = copyin(cm->red, &rbuf[index], count); 405 if (error) 406 return error; 407 error = copyin(cm->green, &gbuf[index], count); 408 if (error) 409 return error; 410 error = copyin(cm->blue, &bbuf[index], count); 411 if (error) 412 return error; 413 414 memcpy(&sc->sc_cmap_red[index], &rbuf[index], count); 415 memcpy(&sc->sc_cmap_green[index], &gbuf[index], count); 416 memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count); 417 418 r = &sc->sc_cmap_red[index]; 419 g = &sc->sc_cmap_green[index]; 420 b = &sc->sc_cmap_blue[index]; 421 for (i = 0; i < count; i++) { 422 OF_call_method_1("color!", sc->sc_ih, 4, *r, *g, *b, index); 423 r++, g++, b++, index++; 424 } 425 return 0; 426 } 427 428 static void 429 ofb_putpalreg(struct ofb_softc *sc, int idx, uint8_t r, uint8_t g, uint8_t b) 430 { 431 if ((idx<0) || (idx > 255)) 432 return; 433 if (sc != NULL) { 434 OF_call_method_1("color!", sc->sc_ih, 4, r, g, b, idx); 435 sc->sc_cmap_red[idx] = r; 436 sc->sc_cmap_green[idx] = g; 437 sc->sc_cmap_blue[idx] = b; 438 } else { 439 OF_call_method_1("color!", console_instance, 4, r, g, b, idx); 440 } 441 } 442 443 static void 444 ofb_init_cmap(struct ofb_softc *sc) 445 { 446 int i; 447 448 /* mess with the palette only when we're running in 8 bit */ 449 if (rascons_console_screen.scr_ri.ri_depth == 8) { 450 for (i = 0; i < 256; i++) { 451 ofb_putpalreg(sc, i, rasops_cmap[(i * 3) + 0], 452 rasops_cmap[(i * 3) + 1], 453 rasops_cmap[(i * 3) + 2]); 454 } 455 } 456 } 457