Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sparc64/ebus/ebus.c
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1 /*- 2 * Copyright (c) 1999, 2000 Matthew R. Green 3 * Copyright (c) 2001 Thomas Moestl <tmm@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * from: NetBSD: ebus.c,v 1.26 2001/09/10 16:27:53 eeh Exp 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD: releng/6.0/sys/sparc64/ebus/ebus.c 146967 2005-06-04 20:31:20Z marius $"); 34 35 /* 36 * UltraSPARC 5 and beyond Ebus support. 37 * 38 * note that this driver is not complete: 39 * - ebus2 dma code is completely unwritten 40 * - interrupt establish is written and appears to work 41 * - bus map code is written and appears to work 42 * XXX: This is PCI specific, however, there exist SBus-to-EBus bridges... 43 * XXX: The EBus was designed to allow easy adaption of ISA devices to it - a 44 * compatability layer for ISA devices might be nice, although probably not 45 * easily possible because of some cruft (like in[bwl]/out[bwl] and friends). 46 * Additionally, the existing ISA code is limited to one ISA bus, however, 47 * there are machines with both ISA and EBus. 48 */ 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/bus.h> 53 #include <sys/kernel.h> 54 #include <sys/malloc.h> 55 #include <sys/module.h> 56 57 #include <machine/bus.h> 58 59 #include <sys/rman.h> 60 61 #include <dev/ofw/ofw_bus.h> 62 #include <dev/ofw/openfirm.h> 63 64 #include <machine/ofw_bus.h> 65 #include <machine/resource.h> 66 67 #include <dev/pci/pcireg.h> 68 #include <dev/pci/pcivar.h> 69 70 #include <sparc64/pci/ofw_pci.h> 71 72 /* 73 * The register, ranges and interrupt map properties are identical to the ISA 74 * ones. 75 */ 76 #include <sparc64/isa/ofw_isa.h> 77 78 struct ebus_devinfo { 79 char *edi_compat; /* PROM compatible */ 80 char *edi_model; /* PROM model */ 81 char *edi_name; /* PROM name */ 82 char *edi_type; /* PROM device_type */ 83 phandle_t edi_node; /* PROM node */ 84 85 struct resource_list edi_rl; 86 }; 87 88 struct ebus_rinfo { 89 int eri_rtype; 90 struct rman eri_rman; 91 struct resource *eri_res; 92 }; 93 94 struct ebus_softc { 95 phandle_t sc_node; 96 97 struct isa_ranges *sc_range; 98 struct ebus_rinfo *sc_rinfo; 99 100 int sc_nrange; 101 int sc_nimap; 102 103 struct ofw_bus_iinfo sc_iinfo; 104 }; 105 106 static device_probe_t ebus_probe; 107 static device_attach_t ebus_attach; 108 static bus_print_child_t ebus_print_child; 109 static bus_probe_nomatch_t ebus_probe_nomatch; 110 static bus_alloc_resource_t ebus_alloc_resource; 111 static bus_release_resource_t ebus_release_resource; 112 static bus_get_resource_list_t ebus_get_resource_list; 113 static ofw_bus_get_compat_t ebus_get_compat; 114 static ofw_bus_get_model_t ebus_get_model; 115 static ofw_bus_get_name_t ebus_get_name; 116 static ofw_bus_get_node_t ebus_get_node; 117 static ofw_bus_get_type_t ebus_get_type; 118 119 static struct ebus_devinfo *ebus_setup_dinfo(device_t, struct ebus_softc *, 120 phandle_t, char *); 121 static void ebus_destroy_dinfo(struct ebus_devinfo *); 122 static int ebus_print_res(struct ebus_devinfo *); 123 124 static device_method_t ebus_methods[] = { 125 /* Device interface */ 126 DEVMETHOD(device_probe, ebus_probe), 127 DEVMETHOD(device_attach, ebus_attach), 128 129 /* Bus interface */ 130 DEVMETHOD(bus_print_child, ebus_print_child), 131 DEVMETHOD(bus_probe_nomatch, ebus_probe_nomatch), 132 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 133 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 134 DEVMETHOD(bus_alloc_resource, ebus_alloc_resource), 135 DEVMETHOD(bus_get_resource_list, ebus_get_resource_list), 136 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 137 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 138 DEVMETHOD(bus_release_resource, ebus_release_resource), 139 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 140 141 /* ofw_bus interface */ 142 DEVMETHOD(ofw_bus_get_compat, ebus_get_compat), 143 DEVMETHOD(ofw_bus_get_model, ebus_get_model), 144 DEVMETHOD(ofw_bus_get_name, ebus_get_name), 145 DEVMETHOD(ofw_bus_get_node, ebus_get_node), 146 DEVMETHOD(ofw_bus_get_type, ebus_get_type), 147 148 { 0, 0 } 149 }; 150 151 static driver_t ebus_driver = { 152 "ebus", 153 ebus_methods, 154 sizeof(struct ebus_softc), 155 }; 156 157 static devclass_t ebus_devclass; 158 159 DRIVER_MODULE(ebus, pci, ebus_driver, ebus_devclass, 0, 0); 160 161 static int 162 ebus_probe(device_t dev) 163 { 164 165 if (pci_get_class(dev) != PCIC_BRIDGE || 166 pci_get_vendor(dev) != 0x108e || 167 strcmp(ofw_bus_get_name(dev), "ebus") != 0) 168 return (ENXIO); 169 170 if (pci_get_device(dev) == 0x1000) 171 device_set_desc(dev, "PCI-EBus2 bridge"); 172 else if (pci_get_device(dev) == 0x1100) 173 device_set_desc(dev, "PCI-EBus3 bridge"); 174 else 175 return (ENXIO); 176 return (0); 177 } 178 179 static int 180 ebus_attach(device_t dev) 181 { 182 struct ebus_softc *sc; 183 struct ebus_devinfo *edi; 184 struct ebus_rinfo *eri; 185 struct resource *res; 186 device_t cdev; 187 phandle_t node; 188 char *cname; 189 int i, rnum, rid; 190 191 sc = device_get_softc(dev); 192 sc->sc_node = node = ofw_bus_get_node(dev); 193 194 sc->sc_nrange = OF_getprop_alloc(node, "ranges", 195 sizeof(*sc->sc_range), (void **)&sc->sc_range); 196 if (sc->sc_nrange == -1) { 197 printf("ebus_attach: could not get ranges property\n"); 198 return (ENXIO); 199 } 200 201 sc->sc_rinfo = malloc(sizeof(*sc->sc_rinfo) * sc->sc_nrange, M_DEVBUF, 202 M_WAITOK | M_ZERO); 203 204 /* For every range, there must be a matching resource. */ 205 for (rnum = 0; rnum < sc->sc_nrange; rnum++) { 206 eri = &sc->sc_rinfo[rnum]; 207 eri->eri_rtype = ofw_isa_range_restype(&sc->sc_range[rnum]); 208 rid = PCIR_BAR(rnum); 209 res = bus_alloc_resource_any(dev, eri->eri_rtype, &rid, 210 RF_ACTIVE); 211 if (res == NULL) { 212 printf("ebus_attach: failed to allocate range " 213 "resource!\n"); 214 goto fail; 215 } 216 eri->eri_res = res; 217 eri->eri_rman.rm_type = RMAN_ARRAY; 218 eri->eri_rman.rm_descr = "EBus range"; 219 if (rman_init(&eri->eri_rman) != 0) { 220 printf("ebus_attach: failed to initialize rman!"); 221 goto fail; 222 } 223 if (rman_manage_region(&eri->eri_rman, rman_get_start(res), 224 rman_get_end(res)) != 0) { 225 printf("ebus_attach: failed to register region!"); 226 rman_fini(&eri->eri_rman); 227 goto fail; 228 } 229 } 230 231 ofw_bus_setup_iinfo(node, &sc->sc_iinfo, sizeof(ofw_isa_intr_t)); 232 233 /* 234 * Now attach our children. 235 */ 236 for (node = OF_child(node); node > 0; node = OF_peer(node)) { 237 if ((OF_getprop_alloc(node, "name", 1, (void **)&cname)) == -1) 238 continue; 239 240 if ((edi = ebus_setup_dinfo(dev, sc, node, cname)) == NULL) { 241 device_printf(dev, "<%s>: incomplete\n", cname); 242 free(cname, M_OFWPROP); 243 continue; 244 } 245 if ((cdev = device_add_child(dev, NULL, -1)) == NULL) 246 panic("ebus_attach: device_add_child failed"); 247 device_set_ivars(cdev, edi); 248 } 249 return (bus_generic_attach(dev)); 250 251 fail: 252 for (i = rnum; i >= 0; i--) { 253 eri = &sc->sc_rinfo[i]; 254 if (i < rnum) 255 rman_fini(&eri->eri_rman); 256 if (eri->eri_res != 0) { 257 bus_release_resource(dev, eri->eri_rtype, 258 PCIR_BAR(rnum), eri->eri_res); 259 } 260 } 261 free(sc->sc_range, M_OFWPROP); 262 return (ENXIO); 263 } 264 265 static int 266 ebus_print_child(device_t dev, device_t child) 267 { 268 struct ebus_devinfo *edi; 269 int retval; 270 271 edi = device_get_ivars(child); 272 retval = bus_print_child_header(dev, child); 273 retval += ebus_print_res(edi); 274 retval += bus_print_child_footer(dev, child); 275 return (retval); 276 } 277 278 static void 279 ebus_probe_nomatch(device_t dev, device_t child) 280 { 281 struct ebus_devinfo *edi; 282 283 edi = device_get_ivars(child); 284 device_printf(dev, "<%s>", edi->edi_name); 285 ebus_print_res(edi); 286 printf(" (no driver attached)\n"); 287 } 288 289 static struct resource * 290 ebus_alloc_resource(device_t bus, device_t child, int type, int *rid, 291 u_long start, u_long end, u_long count, u_int flags) 292 { 293 struct ebus_softc *sc; 294 struct resource_list *rl; 295 struct resource_list_entry *rle = NULL; 296 struct resource *res; 297 struct ebus_rinfo *ri; 298 bus_space_tag_t bt; 299 bus_space_handle_t bh; 300 int passthrough = (device_get_parent(child) != bus); 301 int isdefault = (start == 0UL && end == ~0UL); 302 int ridx, rv; 303 304 sc = (struct ebus_softc *)device_get_softc(bus); 305 rl = BUS_GET_RESOURCE_LIST(bus, child); 306 /* 307 * Map ebus ranges to PCI ranges. This may include changing the 308 * allocation type. 309 */ 310 switch (type) { 311 case SYS_RES_MEMORY: 312 KASSERT(!(isdefault && passthrough), 313 ("ebus_alloc_resource: passthrough of default alloc")); 314 if (!passthrough) { 315 rle = resource_list_find(rl, type, *rid); 316 if (rle == NULL) 317 return (NULL); 318 KASSERT(rle->res == NULL, 319 ("ebus_alloc_resource: resource entry is busy")); 320 if (isdefault) { 321 start = rle->start; 322 count = ulmax(count, rle->count); 323 end = ulmax(rle->end, start + count - 1); 324 } 325 } 326 327 (void)ofw_isa_range_map(sc->sc_range, sc->sc_nrange, 328 &start, &end, &ridx); 329 330 ri = &sc->sc_rinfo[ridx]; 331 res = rman_reserve_resource(&ri->eri_rman, start, end, count, 332 flags, child); 333 if (res == NULL) 334 return (NULL); 335 bt = rman_get_bustag(ri->eri_res); 336 rman_set_bustag(res, bt); 337 rv = bus_space_subregion(bt, rman_get_bushandle(ri->eri_res), 338 rman_get_start(res) - rman_get_start(ri->eri_res), count, 339 &bh); 340 if (rv != 0) { 341 rman_release_resource(res); 342 return (NULL); 343 } 344 rman_set_bushandle(res, bh); 345 if (!passthrough) 346 rle->res = res; 347 return (res); 348 case SYS_RES_IRQ: 349 return (resource_list_alloc(rl, bus, child, type, rid, start, 350 end, count, flags)); 351 } 352 353 return (NULL); 354 } 355 356 int 357 ebus_release_resource(device_t bus, device_t child, int type, int rid, 358 struct resource *res) 359 { 360 struct resource_list *rl; 361 struct resource_list_entry *rle; 362 int passthrough = (device_get_parent(child) != bus); 363 int rv; 364 365 rl = BUS_GET_RESOURCE_LIST(bus, child); 366 switch (type) { 367 case SYS_RES_MEMORY: 368 if ((rv = rman_release_resource(res)) != 0) 369 return (rv); 370 if (!passthrough) { 371 rle = resource_list_find(rl, type, rid); 372 KASSERT(rle != NULL, ("ebus_release_resource: " 373 "resource entry not found!")); 374 KASSERT(rle->res != NULL, ("ebus_alloc_resource: " 375 "resource entry is not busy")); 376 rle->res = NULL; 377 } 378 break; 379 case SYS_RES_IRQ: 380 return (resource_list_release(rl, bus, child, type, rid, res)); 381 default: 382 panic("ebus_release_resource: unsupported resource type %d", 383 type); 384 } 385 return (0); 386 } 387 388 static struct resource_list * 389 ebus_get_resource_list(device_t dev, device_t child) 390 { 391 struct ebus_devinfo *edi; 392 393 edi = device_get_ivars(child); 394 return (&edi->edi_rl); 395 } 396 397 static struct ebus_devinfo * 398 ebus_setup_dinfo(device_t dev, struct ebus_softc *sc, phandle_t node, 399 char *name) 400 { 401 struct ebus_devinfo *edi; 402 struct isa_regs *reg; 403 ofw_isa_intr_t *intrs; 404 ofw_pci_intr_t rintr; 405 u_int64_t start; 406 int nreg, nintr, i; 407 408 edi = malloc(sizeof(*edi), M_DEVBUF, M_ZERO | M_WAITOK); 409 if (edi == NULL) 410 return (NULL); 411 resource_list_init(&edi->edi_rl); 412 edi->edi_name = name; 413 edi->edi_node = node; 414 415 OF_getprop_alloc(node, "compatible", 1, (void **)&edi->edi_compat); 416 OF_getprop_alloc(node, "device_type", 1, (void **)&edi->edi_type); 417 OF_getprop_alloc(node, "model", 1, (void **)&edi->edi_model); 418 nreg = OF_getprop_alloc(node, "reg", sizeof(*reg), (void **)®); 419 if (nreg == -1) { 420 ebus_destroy_dinfo(edi); 421 return (NULL); 422 } 423 for (i = 0; i < nreg; i++) { 424 start = ISA_REG_PHYS(reg + i); 425 resource_list_add(&edi->edi_rl, SYS_RES_MEMORY, i, 426 start, start + reg[i].size - 1, reg[i].size); 427 } 428 free(reg, M_OFWPROP); 429 430 nintr = OF_getprop_alloc(node, "interrupts", sizeof(*intrs), 431 (void **)&intrs); 432 for (i = 0; i < nintr; i++) { 433 rintr = ofw_isa_route_intr(dev, node, &sc->sc_iinfo, intrs[i]); 434 if (rintr == PCI_INVALID_IRQ) 435 panic("ebus_setup_dinfo: could not map ebus " 436 "interrupt %d", intrs[i]); 437 resource_list_add(&edi->edi_rl, SYS_RES_IRQ, i, 438 rintr, rintr, 1); 439 } 440 free(intrs, M_OFWPROP); 441 442 return (edi); 443 } 444 445 /* 446 * NOTE: This does not free the name member (it is needed afterwards in some 447 * cases). 448 */ 449 static void 450 ebus_destroy_dinfo(struct ebus_devinfo *edi) 451 { 452 453 if (edi->edi_compat != NULL) 454 free(edi->edi_compat, M_OFWPROP); 455 if (edi->edi_type != NULL) 456 free(edi->edi_type, M_OFWPROP); 457 if (edi->edi_model != NULL) 458 free(edi->edi_model, M_OFWPROP); 459 resource_list_free(&edi->edi_rl); 460 free(edi, M_DEVBUF); 461 } 462 463 static int 464 ebus_print_res(struct ebus_devinfo *edi) 465 { 466 int retval; 467 468 retval = 0; 469 retval += resource_list_print_type(&edi->edi_rl, "addr", SYS_RES_MEMORY, 470 "%#lx"); 471 retval += resource_list_print_type(&edi->edi_rl, "irq", SYS_RES_IRQ, 472 "%ld"); 473 return (retval); 474 } 475 476 static const char * 477 ebus_get_compat(device_t bus, device_t dev) 478 { 479 struct ebus_devinfo *dinfo; 480 481 dinfo = device_get_ivars(dev); 482 return (dinfo->edi_compat); 483 } 484 485 static const char * 486 ebus_get_model(device_t bus, device_t dev) 487 { 488 struct ebus_devinfo *dinfo; 489 490 dinfo = device_get_ivars(dev); 491 return (dinfo->edi_model); 492 } 493 494 static const char * 495 ebus_get_name(device_t bus, device_t dev) 496 { 497 struct ebus_devinfo *dinfo; 498 499 dinfo = device_get_ivars(dev); 500 return (dinfo->edi_name); 501 } 502 503 static phandle_t 504 ebus_get_node(device_t bus, device_t dev) 505 { 506 struct ebus_devinfo *dinfo; 507 508 dinfo = device_get_ivars(dev); 509 return (dinfo->edi_node); 510 } 511 512 static const char * 513 ebus_get_type(device_t bus, device_t dev) 514 { 515 struct ebus_devinfo *dinfo; 516 517 dinfo = device_get_ivars(dev); 518 return (dinfo->edi_type); 519 }
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