1 /* $OpenBSD: ebus.c,v 1.12 2003/06/12 05:57:43 henric Exp $ */ 2 /* $NetBSD: ebus.c,v 1.24 2001/07/25 03:49:54 eeh Exp $ */ 3 4 /* 5 * Copyright (c) 1999, 2000 Matthew R. Green 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * UltraSPARC 5 and beyond ebus support. 34 * 35 * note that this driver is not complete: 36 * - ebus2 dma code is completely unwritten 37 * - interrupt establish is written and appears to work 38 * - bus map code is written and appears to work 39 */ 40 41 #ifdef DEBUG 42 #define EDB_PROM 0x01 43 #define EDB_CHILD 0x02 44 #define EDB_INTRMAP 0x04 45 #define EDB_BUSMAP 0x08 46 #define EDB_BUSDMA 0x10 47 #define EDB_INTR 0x20 48 int ebus_debug = 0x0; 49 #define DPRINTF(l, s) do { if (ebus_debug & l) printf s; } while (0) 50 #else 51 #define DPRINTF(l, s) 52 #endif 53 54 #include <sys/param.h> 55 #include <sys/conf.h> 56 #include <sys/device.h> 57 #include <sys/errno.h> 58 #include <sys/extent.h> 59 #include <sys/malloc.h> 60 #include <sys/systm.h> 61 #include <sys/time.h> 62 63 #define _SPARC_BUS_DMA_PRIVATE 64 #include <machine/bus.h> 65 #include <machine/autoconf.h> 66 #include <machine/openfirm.h> 67 68 #include <dev/pci/pcivar.h> 69 #include <dev/pci/pcireg.h> 70 #include <dev/pci/pcidevs.h> 71 72 #include <sparc64/dev/iommureg.h> 73 #include <sparc64/dev/iommuvar.h> 74 #include <sparc64/dev/psychoreg.h> 75 #include <sparc64/dev/psychovar.h> 76 #include <sparc64/dev/ebusreg.h> 77 #include <sparc64/dev/ebusvar.h> 78 #include <sparc64/sparc64/cache.h> 79 80 int ebus_match(struct device *, void *, void *); 81 void ebus_attach(struct device *, struct device *, void *); 82 83 struct cfattach ebus_ca = { 84 sizeof(struct ebus_softc), ebus_match, ebus_attach 85 }; 86 87 struct cfdriver ebus_cd = { 88 NULL, "ebus", DV_DULL 89 }; 90 91 92 int ebus_setup_attach_args(struct ebus_softc *, int, 93 struct ebus_attach_args *); 94 void ebus_destroy_attach_args(struct ebus_attach_args *); 95 int ebus_print(void *, const char *); 96 void ebus_find_ino(struct ebus_softc *, struct ebus_attach_args *); 97 int ebus_find_node(struct pci_attach_args *); 98 99 /* 100 * here are our bus space and bus dma routines. 101 */ 102 static paddr_t ebus_bus_mmap(bus_space_tag_t, bus_space_tag_t, bus_addr_t, 103 off_t, int, int); 104 static int _ebus_bus_map(bus_space_tag_t, bus_space_tag_t, bus_addr_t, 105 bus_size_t, int, bus_space_handle_t *); 106 bus_space_tag_t ebus_alloc_mem_tag(struct ebus_softc *, bus_space_tag_t); 107 bus_space_tag_t ebus_alloc_io_tag(struct ebus_softc *, bus_space_tag_t); 108 bus_space_tag_t _ebus_alloc_bus_tag(struct ebus_softc *sc, const char *, 109 bus_space_tag_t, int); 110 111 112 int 113 ebus_match(struct device *parent, void *match, void *aux) 114 { 115 struct pci_attach_args *pa = aux; 116 char name[10]; 117 int node; 118 119 /* Only attach if there's a PROM node. */ 120 node = PCITAG_NODE(pa->pa_tag); 121 if (node == -1) return (0); 122 123 /* Match a real ebus */ 124 OF_getprop(node, "name", &name, sizeof(name)); 125 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 126 PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN && 127 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUS && 128 strcmp(name, "ebus") == 0) 129 return (1); 130 131 /* Or a real ebus III */ 132 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 133 PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN && 134 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUSIII && 135 strcmp(name, "ebus") == 0) 136 return (1); 137 138 /* Or a PCI-ISA bridge XXX I hope this is on-board. */ 139 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 140 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) { 141 return (1); 142 } 143 144 return (0); 145 } 146 147 /* 148 * attach an ebus and all it's children. this code is modeled 149 * after the sbus code which does similar things. 150 */ 151 void 152 ebus_attach(struct device *parent, struct device *self, void *aux) 153 { 154 struct ebus_softc *sc = (struct ebus_softc *)self; 155 struct pci_attach_args *pa = aux; 156 struct ebus_attach_args eba; 157 struct ebus_interrupt_map_mask *immp; 158 int node, nmapmask, error; 159 160 printf("\n"); 161 162 sc->sc_memtag = ebus_alloc_mem_tag(sc, pa->pa_memt); 163 sc->sc_iotag = ebus_alloc_io_tag(sc, pa->pa_iot); 164 sc->sc_dmatag = ebus_alloc_dma_tag(sc, pa->pa_dmat); 165 166 node = PCITAG_NODE(pa->pa_tag); 167 if (node == -1) 168 panic("could not find ebus node"); 169 170 sc->sc_node = node; 171 172 /* 173 * fill in our softc with information from the prom 174 */ 175 sc->sc_intmap = NULL; 176 sc->sc_range = NULL; 177 error = getprop(node, "interrupt-map", 178 sizeof(struct ebus_interrupt_map), 179 &sc->sc_nintmap, (void **)&sc->sc_intmap); 180 switch (error) { 181 case 0: 182 immp = &sc->sc_intmapmask; 183 error = getprop(node, "interrupt-map-mask", 184 sizeof(struct ebus_interrupt_map_mask), &nmapmask, 185 (void **)&immp); 186 if (error) 187 panic("could not get ebus interrupt-map-mask"); 188 if (nmapmask != 1) 189 panic("ebus interrupt-map-mask is broken"); 190 break; 191 case ENOENT: 192 break; 193 default: 194 panic("ebus interrupt-map: error %d", error); 195 break; 196 } 197 198 error = getprop(node, "ranges", sizeof(struct ebus_ranges), 199 &sc->sc_nrange, (void **)&sc->sc_range); 200 if (error) 201 panic("ebus ranges: error %d", error); 202 203 /* 204 * now attach all our children 205 */ 206 DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node)); 207 for (node = firstchild(node); node; node = nextsibling(node)) { 208 char *name = getpropstring(node, "name"); 209 210 if (ebus_setup_attach_args(sc, node, &eba) != 0) { 211 printf("ebus_attach: %s: incomplete\n", name); 212 continue; 213 } else { 214 DPRINTF(EDB_CHILD, ("- found child `%s', attaching\n", 215 eba.ea_name)); 216 (void)config_found(self, &eba, ebus_print); 217 } 218 ebus_destroy_attach_args(&eba); 219 } 220 } 221 222 int 223 ebus_setup_attach_args(struct ebus_softc *sc, int node, 224 struct ebus_attach_args *ea) 225 { 226 int n, rv; 227 228 bzero(ea, sizeof(struct ebus_attach_args)); 229 rv = getprop(node, "name", 1, &n, (void **)&ea->ea_name); 230 if (rv != 0) 231 return (rv); 232 ea->ea_name[n] = '\0'; 233 234 ea->ea_node = node; 235 ea->ea_memtag = sc->sc_memtag; 236 ea->ea_iotag = sc->sc_iotag; 237 ea->ea_dmatag = sc->sc_dmatag; 238 239 rv = getprop(node, "reg", sizeof(struct ebus_regs), &ea->ea_nregs, 240 (void **)&ea->ea_regs); 241 if (rv) 242 return (rv); 243 244 rv = getprop(node, "address", sizeof(u_int32_t), &ea->ea_nvaddrs, 245 (void **)&ea->ea_vaddrs); 246 if (rv != ENOENT) { 247 if (rv) 248 return (rv); 249 250 if (ea->ea_nregs != ea->ea_nvaddrs) 251 printf("ebus loses: device %s: %d regs and %d addrs\n", 252 ea->ea_name, ea->ea_nregs, ea->ea_nvaddrs); 253 } else 254 ea->ea_nvaddrs = 0; 255 256 if (getprop(node, "interrupts", sizeof(u_int32_t), &ea->ea_nintrs, 257 (void **)&ea->ea_intrs)) 258 ea->ea_nintrs = 0; 259 else 260 ebus_find_ino(sc, ea); 261 262 return (0); 263 } 264 265 void 266 ebus_destroy_attach_args(struct ebus_attach_args *ea) 267 { 268 if (ea->ea_name) 269 free((void *)ea->ea_name, M_DEVBUF); 270 if (ea->ea_regs) 271 free((void *)ea->ea_regs, M_DEVBUF); 272 if (ea->ea_intrs) 273 free((void *)ea->ea_intrs, M_DEVBUF); 274 if (ea->ea_vaddrs) 275 free((void *)ea->ea_vaddrs, M_DEVBUF); 276 } 277 278 int 279 ebus_print(void *aux, const char *p) 280 { 281 struct ebus_attach_args *ea = aux; 282 int i; 283 284 if (p) 285 printf("%s at %s", ea->ea_name, p); 286 for (i = 0; i < ea->ea_nregs; i++) 287 printf("%s %x-%x", i == 0 ? " addr" : ",", 288 ea->ea_regs[i].lo, 289 ea->ea_regs[i].lo + ea->ea_regs[i].size - 1); 290 for (i = 0; i < ea->ea_nintrs; i++) 291 printf(" ipl %d", ea->ea_intrs[i]); 292 return (UNCONF); 293 } 294 295 296 /* 297 * find the INO values for each interrupt and fill them in. 298 * 299 * for each "reg" property of this device, mask it's hi and lo 300 * values with the "interrupt-map-mask"'s hi/lo values, and also 301 * mask the interrupt number with the interrupt mask. search the 302 * "interrupt-map" list for matching values of hi, lo and interrupt 303 * to give the INO for this interrupt. 304 */ 305 void 306 ebus_find_ino(struct ebus_softc *sc, struct ebus_attach_args *ea) 307 { 308 u_int32_t hi, lo, intr; 309 int i, j, k; 310 311 if (sc->sc_nintmap == 0) { 312 for (i = 0; i < ea->ea_nintrs; i++) { 313 OF_mapintr(ea->ea_node, &ea->ea_intrs[i], 314 sizeof(ea->ea_intrs[0]), 315 sizeof(ea->ea_intrs[0])); 316 } 317 return; 318 } 319 320 DPRINTF(EDB_INTRMAP, 321 ("ebus_find_ino: searching %d interrupts", ea->ea_nintrs)); 322 323 for (j = 0; j < ea->ea_nintrs; j++) { 324 325 intr = ea->ea_intrs[j] & sc->sc_intmapmask.intr; 326 327 DPRINTF(EDB_INTRMAP, 328 ("; intr %x masked to %x", ea->ea_intrs[j], intr)); 329 for (i = 0; i < ea->ea_nregs; i++) { 330 hi = ea->ea_regs[i].hi & sc->sc_intmapmask.hi; 331 lo = ea->ea_regs[i].lo & sc->sc_intmapmask.lo; 332 333 DPRINTF(EDB_INTRMAP, 334 ("; reg hi.lo %08x.%08x masked to %08x.%08x", 335 ea->ea_regs[i].hi, ea->ea_regs[i].lo, hi, lo)); 336 for (k = 0; k < sc->sc_nintmap; k++) { 337 DPRINTF(EDB_INTRMAP, 338 ("; checking hi.lo %08x.%08x intr %x", 339 sc->sc_intmap[k].hi, sc->sc_intmap[k].lo, 340 sc->sc_intmap[k].intr)); 341 if (hi == sc->sc_intmap[k].hi && 342 lo == sc->sc_intmap[k].lo && 343 intr == sc->sc_intmap[k].intr) { 344 ea->ea_intrs[j] = 345 sc->sc_intmap[k].cintr; 346 DPRINTF(EDB_INTRMAP, 347 ("; FOUND IT! changing to %d\n", 348 sc->sc_intmap[k].cintr)); 349 goto next_intr; 350 } 351 } 352 } 353 next_intr:; 354 } 355 } 356 357 bus_space_tag_t 358 ebus_alloc_mem_tag(struct ebus_softc *sc, bus_space_tag_t parent) 359 { 360 return (_ebus_alloc_bus_tag(sc, "mem", parent, 361 0x02)); /* 32-bit mem space (where's the #define???) */ 362 } 363 364 bus_space_tag_t 365 ebus_alloc_io_tag(struct ebus_softc *sc, bus_space_tag_t parent) 366 { 367 return (_ebus_alloc_bus_tag(sc, "io", parent, 368 0x01)); /* IO space (where's the #define???) */ 369 } 370 371 /* 372 * bus space and bus dma below here 373 */ 374 bus_space_tag_t 375 _ebus_alloc_bus_tag(struct ebus_softc *sc, const char *name, 376 bus_space_tag_t parent, int ss) 377 { 378 struct sparc_bus_space_tag *bt; 379 380 bt = malloc(sizeof(*bt), M_DEVBUF, M_NOWAIT); 381 if (bt == NULL) 382 panic("could not allocate ebus bus tag"); 383 384 bzero(bt, sizeof *bt); 385 snprintf(bt->name, sizeof(bt->name), "%s_%s", 386 sc->sc_dev.dv_xname, name); 387 bt->cookie = sc; 388 bt->parent = parent; 389 bt->default_type = ss; 390 bt->asi = parent->asi; 391 bt->sasi = parent->sasi; 392 bt->sparc_bus_map = _ebus_bus_map; 393 bt->sparc_bus_mmap = ebus_bus_mmap; 394 395 return (bt); 396 } 397 398 bus_dma_tag_t 399 ebus_alloc_dma_tag(struct ebus_softc *sc, bus_dma_tag_t pdt) 400 { 401 bus_dma_tag_t dt; 402 403 dt = (bus_dma_tag_t) 404 malloc(sizeof(struct sparc_bus_dma_tag), M_DEVBUF, M_NOWAIT); 405 if (dt == NULL) 406 panic("could not allocate ebus dma tag"); 407 408 bzero(dt, sizeof *dt); 409 dt->_cookie = sc; 410 dt->_parent = pdt; 411 sc->sc_dmatag = dt; 412 return (dt); 413 } 414 415 /* 416 * bus space support. <sparc64/dev/psychoreg.h> has a discussion 417 * about PCI physical addresses, which also applies to ebus. 418 */ 419 static int 420 _ebus_bus_map(bus_space_tag_t t, bus_space_tag_t t0, bus_addr_t offset, 421 bus_size_t size, int flags, bus_space_handle_t *hp) 422 { 423 struct ebus_softc *sc = t->cookie; 424 bus_addr_t hi, lo; 425 int i; 426 427 DPRINTF(EDB_BUSMAP, 428 ("\n_ebus_bus_map: type %d off %016llx sz %x flags %d", 429 (int)t->default_type, (unsigned long long)offset, (int)size, 430 (int)flags)); 431 432 if (t->parent == 0 || t->parent->sparc_bus_map == 0) { 433 printf("\n_ebus_bus_map: invalid parent"); 434 return (EINVAL); 435 } 436 437 t = t->parent; 438 439 if (flags & BUS_SPACE_MAP_PROMADDRESS) { 440 return ((*t->sparc_bus_map) 441 (t, t0, offset, size, flags, hp)); 442 } 443 444 hi = offset >> 32UL; 445 lo = offset & 0xffffffff; 446 447 DPRINTF(EDB_BUSMAP, (" (hi %08x lo %08x)", (u_int)hi, (u_int)lo)); 448 for (i = 0; i < sc->sc_nrange; i++) { 449 bus_addr_t pciaddr; 450 451 if (hi != sc->sc_range[i].child_hi) 452 continue; 453 if (lo < sc->sc_range[i].child_lo || 454 (lo + size) > 455 (sc->sc_range[i].child_lo + sc->sc_range[i].size)) 456 continue; 457 458 if(((sc->sc_range[i].phys_hi >> 24) & 3) != t->default_type) 459 continue; 460 461 pciaddr = ((bus_addr_t)sc->sc_range[i].phys_mid << 32UL) | 462 sc->sc_range[i].phys_lo; 463 pciaddr += lo; 464 DPRINTF(EDB_BUSMAP, 465 ("\n_ebus_bus_map: mapping space %x paddr offset %qx " 466 "pciaddr %qx\n", (int)t->default_type, 467 (unsigned long long)offset, (unsigned long long)pciaddr)); 468 /* pass it onto the psycho */ 469 return ((*t->sparc_bus_map)(t, t0, pciaddr, size, flags, hp)); 470 } 471 DPRINTF(EDB_BUSMAP, (": FAILED\n")); 472 return (EINVAL); 473 } 474 475 static paddr_t 476 ebus_bus_mmap(bus_space_tag_t t, bus_space_tag_t t0, bus_addr_t paddr, 477 off_t off, int prot, int flags) 478 { 479 bus_addr_t offset = paddr; 480 struct ebus_softc *sc = t->cookie; 481 int i; 482 483 if (t->parent == 0 || t->parent->sparc_bus_mmap == 0) { 484 printf("\nebus_bus_mmap: invalid parent"); 485 return (-1); 486 } 487 488 t = t->parent; 489 490 for (i = 0; i < sc->sc_nrange; i++) { 491 bus_addr_t paddr = 492 ((bus_addr_t)sc->sc_range[i].child_hi << 32) | 493 sc->sc_range[i].child_lo; 494 495 if (offset != paddr) 496 continue; 497 498 DPRINTF(EDB_BUSMAP, ("\n_ebus_bus_mmap: mapping paddr %qx\n", 499 (unsigned long long)paddr)); 500 return ((*t->sparc_bus_mmap)(t, t0, paddr, off, prot, flags)); 501 } 502 503 return (-1); 504 } 505 506