1 /*- 2 * Copyright 2003 by Peter Grehan. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/module.h> 33 #include <sys/bus.h> 34 #include <sys/conf.h> 35 #include <sys/kernel.h> 36 37 #include <dev/ofw/openfirm.h> 38 #include <dev/ofw/ofw_pci.h> 39 #include <dev/ofw/ofw_bus.h> 40 #include <dev/ofw/ofw_bus_subr.h> 41 42 #include <dev/pci/pcivar.h> 43 #include <dev/pci/pcireg.h> 44 45 #include <machine/bus.h> 46 #include <machine/intr_machdep.h> 47 #include <machine/md_var.h> 48 #include <machine/pio.h> 49 #include <machine/resource.h> 50 51 #include <sys/rman.h> 52 53 #include <powerpc/powermac/gracklevar.h> 54 55 #include <vm/vm.h> 56 #include <vm/pmap.h> 57 58 #include "pcib_if.h" 59 60 int badaddr(void *, size_t); /* XXX */ 61 62 /* 63 * Device interface. 64 */ 65 static int grackle_probe(device_t); 66 static int grackle_attach(device_t); 67 68 /* 69 * Bus interface. 70 */ 71 static int grackle_read_ivar(device_t, device_t, int, 72 uintptr_t *); 73 static struct resource * grackle_alloc_resource(device_t bus, 74 device_t child, int type, int *rid, u_long start, 75 u_long end, u_long count, u_int flags); 76 static int grackle_release_resource(device_t bus, device_t child, 77 int type, int rid, struct resource *res); 78 static int grackle_activate_resource(device_t bus, device_t child, 79 int type, int rid, struct resource *res); 80 static int grackle_deactivate_resource(device_t bus, 81 device_t child, int type, int rid, 82 struct resource *res); 83 84 85 /* 86 * pcib interface. 87 */ 88 static int grackle_maxslots(device_t); 89 static u_int32_t grackle_read_config(device_t, u_int, u_int, u_int, 90 u_int, int); 91 static void grackle_write_config(device_t, u_int, u_int, u_int, 92 u_int, u_int32_t, int); 93 static int grackle_route_interrupt(device_t, device_t, int); 94 95 /* 96 * ofw_bus interface 97 */ 98 static phandle_t grackle_get_node(device_t bus, device_t dev); 99 100 /* 101 * Local routines. 102 */ 103 static int grackle_enable_config(struct grackle_softc *, u_int, 104 u_int, u_int, u_int); 105 static void grackle_disable_config(struct grackle_softc *); 106 107 /* 108 * Driver methods. 109 */ 110 static device_method_t grackle_methods[] = { 111 /* Device interface */ 112 DEVMETHOD(device_probe, grackle_probe), 113 DEVMETHOD(device_attach, grackle_attach), 114 115 /* Bus interface */ 116 DEVMETHOD(bus_print_child, bus_generic_print_child), 117 DEVMETHOD(bus_read_ivar, grackle_read_ivar), 118 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 119 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 120 DEVMETHOD(bus_alloc_resource, grackle_alloc_resource), 121 DEVMETHOD(bus_release_resource, grackle_release_resource), 122 DEVMETHOD(bus_activate_resource, grackle_activate_resource), 123 DEVMETHOD(bus_deactivate_resource, grackle_deactivate_resource), 124 125 /* pcib interface */ 126 DEVMETHOD(pcib_maxslots, grackle_maxslots), 127 DEVMETHOD(pcib_read_config, grackle_read_config), 128 DEVMETHOD(pcib_write_config, grackle_write_config), 129 DEVMETHOD(pcib_route_interrupt, grackle_route_interrupt), 130 131 /* ofw_bus interface */ 132 DEVMETHOD(ofw_bus_get_node, grackle_get_node), 133 134 { 0, 0 } 135 }; 136 137 static driver_t grackle_driver = { 138 "pcib", 139 grackle_methods, 140 sizeof(struct grackle_softc) 141 }; 142 143 static devclass_t grackle_devclass; 144 145 DRIVER_MODULE(grackle, nexus, grackle_driver, grackle_devclass, 0, 0); 146 147 static int 148 grackle_probe(device_t dev) 149 { 150 const char *type, *compatible; 151 152 type = ofw_bus_get_type(dev); 153 compatible = ofw_bus_get_compat(dev); 154 155 if (type == NULL || compatible == NULL) 156 return (ENXIO); 157 158 if (strcmp(type, "pci") != 0 || strcmp(compatible, "grackle") != 0) 159 return (ENXIO); 160 161 device_set_desc(dev, "MPC106 (Grackle) Host-PCI bridge"); 162 return (0); 163 } 164 165 static int 166 grackle_attach(device_t dev) 167 { 168 struct grackle_softc *sc; 169 phandle_t node; 170 u_int32_t busrange[2]; 171 struct grackle_range *rp, *io, *mem[2]; 172 int nmem, i, error; 173 174 node = ofw_bus_get_node(dev); 175 sc = device_get_softc(dev); 176 177 if (OF_getprop(node, "bus-range", busrange, sizeof(busrange)) != 8) 178 return (ENXIO); 179 180 sc->sc_dev = dev; 181 sc->sc_node = node; 182 sc->sc_bus = busrange[0]; 183 184 /* 185 * The Grackle PCI config addr/data registers are actually in 186 * PCI space, but since they are needed to actually probe the 187 * PCI bus, use the fact that they are also available directly 188 * on the processor bus and map them 189 */ 190 sc->sc_addr = (vm_offset_t)pmap_mapdev(GRACKLE_ADDR, PAGE_SIZE); 191 sc->sc_data = (vm_offset_t)pmap_mapdev(GRACKLE_DATA, PAGE_SIZE); 192 193 bzero(sc->sc_range, sizeof(sc->sc_range)); 194 sc->sc_nrange = OF_getprop(node, "ranges", sc->sc_range, 195 sizeof(sc->sc_range)); 196 197 if (sc->sc_nrange == -1) { 198 device_printf(dev, "could not get ranges\n"); 199 return (ENXIO); 200 } 201 202 sc->sc_nrange /= sizeof(sc->sc_range[0]); 203 204 sc->sc_range[6].pci_hi = 0; 205 io = NULL; 206 nmem = 0; 207 208 for (rp = sc->sc_range; rp < sc->sc_range + sc->sc_nrange && 209 rp->pci_hi != 0; rp++) { 210 switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) { 211 case OFW_PCI_PHYS_HI_SPACE_CONFIG: 212 break; 213 case OFW_PCI_PHYS_HI_SPACE_IO: 214 io = rp; 215 break; 216 case OFW_PCI_PHYS_HI_SPACE_MEM32: 217 mem[nmem] = rp; 218 nmem++; 219 break; 220 case OFW_PCI_PHYS_HI_SPACE_MEM64: 221 break; 222 } 223 } 224 225 if (io == NULL) { 226 device_printf(dev, "can't find io range\n"); 227 return (ENXIO); 228 } 229 sc->sc_io_rman.rm_type = RMAN_ARRAY; 230 sc->sc_io_rman.rm_descr = "Grackle PCI I/O Ports"; 231 sc->sc_iostart = io->pci_iospace; 232 if (rman_init(&sc->sc_io_rman) != 0 || 233 rman_manage_region(&sc->sc_io_rman, io->pci_lo, 234 io->pci_lo + io->size_lo) != 0) { 235 panic("grackle_attach: failed to set up I/O rman"); 236 } 237 238 if (nmem == 0) { 239 device_printf(dev, "can't find mem ranges\n"); 240 return (ENXIO); 241 } 242 sc->sc_mem_rman.rm_type = RMAN_ARRAY; 243 sc->sc_mem_rman.rm_descr = "Grackle PCI Memory"; 244 error = rman_init(&sc->sc_mem_rman); 245 if (error) { 246 device_printf(dev, "rman_init() failed. error = %d\n", error); 247 return (error); 248 } 249 for (i = 0; i < nmem; i++) { 250 error = rman_manage_region(&sc->sc_mem_rman, mem[i]->pci_lo, 251 mem[i]->pci_lo + mem[i]->size_lo); 252 if (error) { 253 device_printf(dev, 254 "rman_manage_region() failed. error = %d\n", error); 255 return (error); 256 } 257 } 258 259 ofw_bus_setup_iinfo(node, &sc->sc_pci_iinfo, sizeof(cell_t)); 260 261 device_add_child(dev, "pci", device_get_unit(dev)); 262 return (bus_generic_attach(dev)); 263 } 264 265 static int 266 grackle_maxslots(device_t dev) 267 { 268 269 return (PCI_SLOTMAX); 270 } 271 272 static u_int32_t 273 grackle_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg, 274 int width) 275 { 276 struct grackle_softc *sc; 277 vm_offset_t caoff; 278 u_int32_t retval = 0xffffffff; 279 280 sc = device_get_softc(dev); 281 caoff = sc->sc_data + (reg & 0x03); 282 283 if (grackle_enable_config(sc, bus, slot, func, reg) != 0) { 284 285 /* 286 * Config probes to non-existent devices on the 287 * secondary bus generates machine checks. Be sure 288 * to catch these. 289 */ 290 if (bus > 0) { 291 if (badaddr((void *)sc->sc_data, 4)) { 292 return (retval); 293 } 294 } 295 296 switch (width) { 297 case 1: 298 retval = (in8rb(caoff)); 299 break; 300 case 2: 301 retval = (in16rb(caoff)); 302 break; 303 case 4: 304 retval = (in32rb(caoff)); 305 break; 306 } 307 } 308 grackle_disable_config(sc); 309 310 return (retval); 311 } 312 313 static void 314 grackle_write_config(device_t dev, u_int bus, u_int slot, u_int func, 315 u_int reg, u_int32_t val, int width) 316 { 317 struct grackle_softc *sc; 318 vm_offset_t caoff; 319 320 sc = device_get_softc(dev); 321 caoff = sc->sc_data + (reg & 0x03); 322 323 if (grackle_enable_config(sc, bus, slot, func, reg)) { 324 switch (width) { 325 case 1: 326 out8rb(caoff, val); 327 (void)in8rb(caoff); 328 break; 329 case 2: 330 out16rb(caoff, val); 331 (void)in16rb(caoff); 332 break; 333 case 4: 334 out32rb(caoff, val); 335 (void)in32rb(caoff); 336 break; 337 } 338 } 339 grackle_disable_config(sc); 340 } 341 342 static int 343 grackle_route_interrupt(device_t bus, device_t dev, int pin) 344 { 345 struct grackle_softc *sc; 346 struct ofw_pci_register reg; 347 uint32_t pintr, mintr; 348 phandle_t iparent; 349 uint8_t maskbuf[sizeof(reg) + sizeof(pintr)]; 350 351 sc = device_get_softc(bus); 352 pintr = pin; 353 if (ofw_bus_lookup_imap(ofw_bus_get_node(dev), &sc->sc_pci_iinfo, ®, 354 sizeof(reg), &pintr, sizeof(pintr), &mintr, sizeof(mintr), 355 &iparent, maskbuf)) 356 return (MAP_IRQ(iparent, mintr)); 357 358 /* Maybe it's a real interrupt, not an intpin */ 359 if (pin > 4) 360 return (pin); 361 362 device_printf(bus, "could not route pin %d for device %d.%d\n", 363 pin, pci_get_slot(dev), pci_get_function(dev)); 364 return (PCI_INVALID_IRQ); 365 } 366 367 static int 368 grackle_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 369 { 370 struct grackle_softc *sc; 371 372 sc = device_get_softc(dev); 373 374 switch (which) { 375 case PCIB_IVAR_DOMAIN: 376 *result = 0; 377 return (0); 378 case PCIB_IVAR_BUS: 379 *result = sc->sc_bus; 380 return (0); 381 } 382 383 return (ENOENT); 384 } 385 386 static struct resource * 387 grackle_alloc_resource(device_t bus, device_t child, int type, int *rid, 388 u_long start, u_long end, u_long count, u_int flags) 389 { 390 struct grackle_softc *sc; 391 struct resource *rv; 392 struct rman *rm; 393 int needactivate; 394 395 needactivate = flags & RF_ACTIVE; 396 flags &= ~RF_ACTIVE; 397 398 sc = device_get_softc(bus); 399 400 switch (type) { 401 case SYS_RES_MEMORY: 402 rm = &sc->sc_mem_rman; 403 break; 404 405 case SYS_RES_IOPORT: 406 rm = &sc->sc_io_rman; 407 break; 408 409 case SYS_RES_IRQ: 410 return (bus_alloc_resource(bus, type, rid, start, end, count, 411 flags)); 412 413 default: 414 device_printf(bus, "unknown resource request from %s\n", 415 device_get_nameunit(child)); 416 return (NULL); 417 } 418 419 rv = rman_reserve_resource(rm, start, end, count, flags, child); 420 if (rv == NULL) { 421 device_printf(bus, "failed to reserve resource for %s\n", 422 device_get_nameunit(child)); 423 return (NULL); 424 } 425 426 rman_set_rid(rv, *rid); 427 428 if (needactivate) { 429 if (bus_activate_resource(child, type, *rid, rv) != 0) { 430 device_printf(bus, 431 "failed to activate resource for %s\n", 432 device_get_nameunit(child)); 433 rman_release_resource(rv); 434 return (NULL); 435 } 436 } 437 438 return (rv); 439 } 440 441 static int 442 grackle_release_resource(device_t bus, device_t child, int type, int rid, 443 struct resource *res) 444 { 445 if (rman_get_flags(res) & RF_ACTIVE) { 446 int error = bus_deactivate_resource(child, type, rid, res); 447 if (error) 448 return error; 449 } 450 451 return (rman_release_resource(res)); 452 } 453 454 static int 455 grackle_activate_resource(device_t bus, device_t child, int type, int rid, 456 struct resource *res) 457 { 458 struct grackle_softc *sc; 459 void *p; 460 461 sc = device_get_softc(bus); 462 463 if (type == SYS_RES_IRQ) { 464 return (bus_activate_resource(bus, type, rid, res)); 465 } 466 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 467 vm_offset_t start; 468 469 start = (vm_offset_t)rman_get_start(res); 470 /* 471 * For i/o-ports, convert the start address to the 472 * MPC106 PCI i/o window 473 */ 474 if (type == SYS_RES_IOPORT) 475 start += sc->sc_iostart; 476 477 if (bootverbose) 478 printf("grackle mapdev: start %zx, len %ld\n", start, 479 rman_get_size(res)); 480 481 p = pmap_mapdev(start, (vm_size_t)rman_get_size(res)); 482 if (p == NULL) 483 return (ENOMEM); 484 485 rman_set_virtual(res, p); 486 rman_set_bustag(res, &bs_le_tag); 487 rman_set_bushandle(res, (u_long)p); 488 } 489 490 return (rman_activate_resource(res)); 491 } 492 493 static int 494 grackle_deactivate_resource(device_t bus, device_t child, int type, int rid, 495 struct resource *res) 496 { 497 /* 498 * If this is a memory resource, unmap it. 499 */ 500 if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) { 501 u_int32_t psize; 502 503 psize = rman_get_size(res); 504 pmap_unmapdev((vm_offset_t)rman_get_virtual(res), psize); 505 } 506 507 return (rman_deactivate_resource(res)); 508 } 509 510 511 static int 512 grackle_enable_config(struct grackle_softc *sc, u_int bus, u_int slot, 513 u_int func, u_int reg) 514 { 515 u_int32_t cfgval; 516 517 /* 518 * Unlike UniNorth, the format of the config word is the same 519 * for local (0) and remote busses. 520 */ 521 cfgval = (bus << 16) | (slot << 11) | (func << 8) | (reg & 0xFC) 522 | GRACKLE_CFG_ENABLE; 523 524 out32rb(sc->sc_addr, cfgval); 525 (void) in32rb(sc->sc_addr); 526 527 return (1); 528 } 529 530 static void 531 grackle_disable_config(struct grackle_softc *sc) 532 { 533 /* 534 * Clear the GRACKLE_CFG_ENABLE bit to prevent stray 535 * accesses from causing config cycles 536 */ 537 out32rb(sc->sc_addr, 0); 538 } 539 540 static phandle_t 541 grackle_get_node(device_t bus, device_t dev) 542 { 543 struct grackle_softc *sc; 544 545 sc = device_get_softc(bus); 546 /* We only have one child, the PCI bus, which needs our own node. */ 547 548 return sc->sc_node; 549 } 550 551 /* 552 * Driver to swallow Grackle host bridges from the PCI bus side. 553 */ 554 static int 555 grackle_hb_probe(device_t dev) 556 { 557 558 if (pci_get_devid(dev) == 0x00021057) { 559 device_set_desc(dev, "Grackle Host to PCI bridge"); 560 device_quiet(dev); 561 return (0); 562 } 563 564 return (ENXIO); 565 } 566 567 static int 568 grackle_hb_attach(device_t dev) 569 { 570 571 return (0); 572 } 573 574 static device_method_t grackle_hb_methods[] = { 575 /* Device interface */ 576 DEVMETHOD(device_probe, grackle_hb_probe), 577 DEVMETHOD(device_attach, grackle_hb_attach), 578 579 { 0, 0 } 580 }; 581 582 static driver_t grackle_hb_driver = { 583 "grackle_hb", 584 grackle_hb_methods, 585 1, 586 }; 587 static devclass_t grackle_hb_devclass; 588 589 DRIVER_MODULE(grackle_hb, pci, grackle_hb_driver, grackle_hb_devclass, 0, 0); 590