ofw_pci.c revision 290989
1/*- 2 * Copyright (c) 2011 Nathan Whitehorn 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/powerpc/ofw/ofw_pci.c 290989 2015-11-17 16:07:43Z nwhitehorn $"); 29#include <sys/param.h> 30#include <sys/systm.h> 31#include <sys/module.h> 32#include <sys/bus.h> 33#include <sys/conf.h> 34#include <sys/kernel.h> 35 36#include <dev/ofw/openfirm.h> 37#include <dev/ofw/ofw_pci.h> 38#include <dev/ofw/ofw_bus.h> 39#include <dev/ofw/ofw_bus_subr.h> 40 41#include <dev/pci/pcivar.h> 42#include <dev/pci/pcireg.h> 43 44#include <machine/bus.h> 45#include <machine/intr_machdep.h> 46#include <machine/md_var.h> 47#include <machine/pio.h> 48#include <machine/resource.h> 49 50#include <sys/rman.h> 51 52#include <vm/vm.h> 53#include <vm/pmap.h> 54 55#include <powerpc/ofw/ofw_pci.h> 56 57#include "pcib_if.h" 58 59/* 60 * Bus interface. 61 */ 62static int ofw_pci_read_ivar(device_t, device_t, int, 63 uintptr_t *); 64static struct resource * ofw_pci_alloc_resource(device_t bus, 65 device_t child, int type, int *rid, u_long start, 66 u_long end, u_long count, u_int flags); 67static int ofw_pci_release_resource(device_t bus, device_t child, 68 int type, int rid, struct resource *res); 69static int ofw_pci_activate_resource(device_t bus, device_t child, 70 int type, int rid, struct resource *res); 71static int ofw_pci_deactivate_resource(device_t bus, 72 device_t child, int type, int rid, 73 struct resource *res); 74static int ofw_pci_adjust_resource(device_t bus, device_t child, 75 int type, struct resource *res, u_long start, 76 u_long end); 77 78/* 79 * pcib interface. 80 */ 81static int ofw_pci_maxslots(device_t); 82static int ofw_pci_route_interrupt(device_t, device_t, int); 83 84/* 85 * ofw_bus interface 86 */ 87static phandle_t ofw_pci_get_node(device_t bus, device_t dev); 88 89/* 90 * local methods 91 */ 92 93static int ofw_pci_nranges(phandle_t node); 94static int ofw_pci_fill_ranges(phandle_t node, struct ofw_pci_range *ranges); 95 96/* 97 * Driver methods. 98 */ 99static device_method_t ofw_pci_methods[] = { 100 /* Device interface */ 101 DEVMETHOD(device_attach, ofw_pci_attach), 102 103 /* Bus interface */ 104 DEVMETHOD(bus_print_child, bus_generic_print_child), 105 DEVMETHOD(bus_read_ivar, ofw_pci_read_ivar), 106 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 107 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 108 DEVMETHOD(bus_alloc_resource, ofw_pci_alloc_resource), 109 DEVMETHOD(bus_release_resource, ofw_pci_release_resource), 110 DEVMETHOD(bus_activate_resource, ofw_pci_activate_resource), 111 DEVMETHOD(bus_deactivate_resource, ofw_pci_deactivate_resource), 112 DEVMETHOD(bus_adjust_resource, ofw_pci_adjust_resource), 113 114 /* pcib interface */ 115 DEVMETHOD(pcib_maxslots, ofw_pci_maxslots), 116 DEVMETHOD(pcib_route_interrupt, ofw_pci_route_interrupt), 117 118 /* ofw_bus interface */ 119 DEVMETHOD(ofw_bus_get_node, ofw_pci_get_node), 120 121 DEVMETHOD_END 122}; 123 124DEFINE_CLASS_0(ofw_pci, ofw_pci_driver, ofw_pci_methods, 0); 125 126int 127ofw_pci_init(device_t dev) 128{ 129 struct ofw_pci_softc *sc; 130 phandle_t node; 131 u_int32_t busrange[2]; 132 struct ofw_pci_range *rp; 133 int error; 134 135 node = ofw_bus_get_node(dev); 136 sc = device_get_softc(dev); 137 sc->sc_initialized = 1; 138 139 if (OF_getencprop(node, "reg", (pcell_t *)&sc->sc_pcir, 140 sizeof(sc->sc_pcir)) == -1) 141 return (ENXIO); 142 143 if (OF_getencprop(node, "bus-range", busrange, sizeof(busrange)) != 8) 144 busrange[0] = 0; 145 146 sc->sc_dev = dev; 147 sc->sc_node = node; 148 sc->sc_bus = busrange[0]; 149 150 if (sc->sc_quirks & OFW_PCI_QUIRK_RANGES_ON_CHILDREN) { 151 phandle_t c; 152 int n, i; 153 154 sc->sc_nrange = 0; 155 for (c = OF_child(node); c != 0; c = OF_peer(c)) { 156 n = ofw_pci_nranges(c); 157 if (n > 0) 158 sc->sc_nrange += n; 159 } 160 if (sc->sc_nrange == 0) 161 return (ENXIO); 162 sc->sc_range = malloc(sc->sc_nrange * sizeof(sc->sc_range[0]), 163 M_DEVBUF, M_WAITOK); 164 i = 0; 165 for (c = OF_child(node); c != 0; c = OF_peer(c)) { 166 n = ofw_pci_fill_ranges(c, &sc->sc_range[i]); 167 if (n > 0) 168 i += n; 169 } 170 KASSERT(i == sc->sc_nrange, ("range count mismatch")); 171 } else { 172 sc->sc_nrange = ofw_pci_nranges(node); 173 if (sc->sc_nrange <= 0) { 174 device_printf(dev, "could not get ranges\n"); 175 return (ENXIO); 176 } 177 sc->sc_range = malloc(sc->sc_nrange * sizeof(sc->sc_range[0]), 178 M_DEVBUF, M_WAITOK); 179 ofw_pci_fill_ranges(node, sc->sc_range); 180 } 181 182 sc->sc_io_rman.rm_type = RMAN_ARRAY; 183 sc->sc_io_rman.rm_descr = "PCI I/O Ports"; 184 error = rman_init(&sc->sc_io_rman); 185 if (error) { 186 device_printf(dev, "rman_init() failed. error = %d\n", error); 187 return (error); 188 } 189 190 sc->sc_mem_rman.rm_type = RMAN_ARRAY; 191 sc->sc_mem_rman.rm_descr = "PCI Memory"; 192 error = rman_init(&sc->sc_mem_rman); 193 if (error) { 194 device_printf(dev, "rman_init() failed. error = %d\n", error); 195 return (error); 196 } 197 198 for (rp = sc->sc_range; rp < sc->sc_range + sc->sc_nrange && 199 rp->pci_hi != 0; rp++) { 200 error = 0; 201 202 switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) { 203 case OFW_PCI_PHYS_HI_SPACE_CONFIG: 204 break; 205 case OFW_PCI_PHYS_HI_SPACE_IO: 206 error = rman_manage_region(&sc->sc_io_rman, rp->pci, 207 rp->pci + rp->size - 1); 208 break; 209 case OFW_PCI_PHYS_HI_SPACE_MEM32: 210 case OFW_PCI_PHYS_HI_SPACE_MEM64: 211 error = rman_manage_region(&sc->sc_mem_rman, rp->pci, 212 rp->pci + rp->size - 1); 213 break; 214 } 215 216 if (error) { 217 device_printf(dev, 218 "rman_manage_region(%x, %#jx, %#jx) failed. " 219 "error = %d\n", rp->pci_hi & 220 OFW_PCI_PHYS_HI_SPACEMASK, rp->pci, 221 rp->pci + rp->size - 1, error); 222 return (error); 223 } 224 } 225 226 ofw_bus_setup_iinfo(node, &sc->sc_pci_iinfo, sizeof(cell_t)); 227 228 return (error); 229} 230 231int 232ofw_pci_attach(device_t dev) 233{ 234 struct ofw_pci_softc *sc; 235 int error; 236 237 sc = device_get_softc(dev); 238 if (!sc->sc_initialized) { 239 error = ofw_pci_init(dev); 240 if (error) 241 return (error); 242 } 243 244 device_add_child(dev, "pci", -1); 245 return (bus_generic_attach(dev)); 246} 247 248static int 249ofw_pci_maxslots(device_t dev) 250{ 251 252 return (PCI_SLOTMAX); 253} 254 255static int 256ofw_pci_route_interrupt(device_t bus, device_t dev, int pin) 257{ 258 struct ofw_pci_softc *sc; 259 struct ofw_pci_register reg; 260 uint32_t pintr, mintr[2]; 261 int intrcells; 262 phandle_t iparent; 263 264 sc = device_get_softc(bus); 265 pintr = pin; 266 267 /* Fabricate imap information in case this isn't an OFW device */ 268 bzero(®, sizeof(reg)); 269 reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) | 270 (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) | 271 (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT); 272 273 intrcells = ofw_bus_lookup_imap(ofw_bus_get_node(dev), 274 &sc->sc_pci_iinfo, ®, sizeof(reg), &pintr, sizeof(pintr), 275 mintr, sizeof(mintr), &iparent); 276 if (intrcells) { 277 pintr = ofw_bus_map_intr(dev, iparent, intrcells, mintr); 278 return (pintr); 279 } 280 281 /* Maybe it's a real interrupt, not an intpin */ 282 if (pin > 4) 283 return (pin); 284 285 device_printf(bus, "could not route pin %d for device %d.%d\n", 286 pin, pci_get_slot(dev), pci_get_function(dev)); 287 return (PCI_INVALID_IRQ); 288} 289 290static int 291ofw_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 292{ 293 struct ofw_pci_softc *sc; 294 295 sc = device_get_softc(dev); 296 297 switch (which) { 298 case PCIB_IVAR_DOMAIN: 299 *result = device_get_unit(dev); 300 return (0); 301 case PCIB_IVAR_BUS: 302 *result = sc->sc_bus; 303 return (0); 304 } 305 306 return (ENOENT); 307} 308 309static struct resource * 310ofw_pci_alloc_resource(device_t bus, device_t child, int type, int *rid, 311 u_long start, u_long end, u_long count, u_int flags) 312{ 313 struct ofw_pci_softc *sc; 314 struct resource *rv; 315 struct rman *rm; 316 int needactivate; 317 318 needactivate = flags & RF_ACTIVE; 319 flags &= ~RF_ACTIVE; 320 321 sc = device_get_softc(bus); 322 323 switch (type) { 324 case SYS_RES_MEMORY: 325 rm = &sc->sc_mem_rman; 326 break; 327 328 case SYS_RES_IOPORT: 329 rm = &sc->sc_io_rman; 330 break; 331 332 case SYS_RES_IRQ: 333 return (bus_alloc_resource(bus, type, rid, start, end, count, 334 flags)); 335 336 default: 337 device_printf(bus, "unknown resource request from %s\n", 338 device_get_nameunit(child)); 339 return (NULL); 340 } 341 342 rv = rman_reserve_resource(rm, start, end, count, flags, child); 343 if (rv == NULL) { 344 device_printf(bus, "failed to reserve resource for %s\n", 345 device_get_nameunit(child)); 346 return (NULL); 347 } 348 349 rman_set_rid(rv, *rid); 350 351 if (needactivate) { 352 if (bus_activate_resource(child, type, *rid, rv) != 0) { 353 device_printf(bus, 354 "failed to activate resource for %s\n", 355 device_get_nameunit(child)); 356 rman_release_resource(rv); 357 return (NULL); 358 } 359 } 360 361 return (rv); 362} 363 364static int 365ofw_pci_release_resource(device_t bus, device_t child, int type, int rid, 366 struct resource *res) 367{ 368 if (rman_get_flags(res) & RF_ACTIVE) { 369 int error = bus_deactivate_resource(child, type, rid, res); 370 if (error) 371 return error; 372 } 373 374 return (rman_release_resource(res)); 375} 376 377static int 378ofw_pci_activate_resource(device_t bus, device_t child, int type, int rid, 379 struct resource *res) 380{ 381 struct ofw_pci_softc *sc; 382 void *p; 383 384 sc = device_get_softc(bus); 385 386 if (type == SYS_RES_IRQ) { 387 return (bus_activate_resource(bus, type, rid, res)); 388 } 389 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 390 struct ofw_pci_range *rp; 391 vm_offset_t start; 392 int space; 393 394 start = (vm_offset_t)rman_get_start(res); 395 396 /* 397 * Map this through the ranges list 398 */ 399 for (rp = sc->sc_range; rp < sc->sc_range + sc->sc_nrange && 400 rp->pci_hi != 0; rp++) { 401 if (start < rp->pci || start >= rp->pci + rp->size) 402 continue; 403 404 switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) { 405 case OFW_PCI_PHYS_HI_SPACE_IO: 406 space = SYS_RES_IOPORT; 407 break; 408 case OFW_PCI_PHYS_HI_SPACE_MEM32: 409 case OFW_PCI_PHYS_HI_SPACE_MEM64: 410 space = SYS_RES_MEMORY; 411 break; 412 default: 413 space = -1; 414 } 415 416 if (type == space) { 417 start += (rp->host - rp->pci); 418 break; 419 } 420 } 421 422 if (bootverbose) 423 printf("ofw_pci mapdev: start %zx, len %ld\n", start, 424 rman_get_size(res)); 425 426 p = pmap_mapdev(start, (vm_size_t)rman_get_size(res)); 427 if (p == NULL) 428 return (ENOMEM); 429 430 rman_set_virtual(res, p); 431 rman_set_bustag(res, &bs_le_tag); 432 rman_set_bushandle(res, (u_long)p); 433 } 434 435 return (rman_activate_resource(res)); 436} 437 438static int 439ofw_pci_deactivate_resource(device_t bus, device_t child, int type, int rid, 440 struct resource *res) 441{ 442 /* 443 * If this is a memory resource, unmap it. 444 */ 445 if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) { 446 u_int32_t psize; 447 448 psize = rman_get_size(res); 449 pmap_unmapdev((vm_offset_t)rman_get_virtual(res), psize); 450 } 451 452 return (rman_deactivate_resource(res)); 453} 454 455static int 456ofw_pci_adjust_resource(device_t bus, device_t child, int type, 457 struct resource *res, u_long start, u_long end) 458{ 459 struct rman *rm = NULL; 460 struct ofw_pci_softc *sc = device_get_softc(bus); 461 462 KASSERT(!(rman_get_flags(res) & RF_ACTIVE), 463 ("active resources cannot be adjusted")); 464 if (rman_get_flags(res) & RF_ACTIVE) 465 return (EINVAL); 466 467 switch (type) { 468 case SYS_RES_MEMORY: 469 rm = &sc->sc_mem_rman; 470 break; 471 case SYS_RES_IOPORT: 472 rm = &sc->sc_io_rman; 473 break; 474 default: 475 return (ENXIO); 476 } 477 478 if (!rman_is_region_manager(res, rm)) 479 return (EINVAL); 480 481 return (rman_adjust_resource(res, start, end)); 482} 483 484 485static phandle_t 486ofw_pci_get_node(device_t bus, device_t dev) 487{ 488 struct ofw_pci_softc *sc; 489 490 sc = device_get_softc(bus); 491 /* We only have one child, the PCI bus, which needs our own node. */ 492 493 return (sc->sc_node); 494} 495 496static int 497ofw_pci_nranges(phandle_t node) 498{ 499 int host_address_cells = 1, pci_address_cells = 3, size_cells = 2; 500 ssize_t nbase_ranges; 501 502 OF_getencprop(OF_parent(node), "#address-cells", &host_address_cells, 503 sizeof(host_address_cells)); 504 OF_getencprop(node, "#address-cells", &pci_address_cells, 505 sizeof(pci_address_cells)); 506 OF_getencprop(node, "#size-cells", &size_cells, sizeof(size_cells)); 507 508 nbase_ranges = OF_getproplen(node, "ranges"); 509 if (nbase_ranges <= 0) 510 return (-1); 511 512 return (nbase_ranges / sizeof(cell_t) / 513 (pci_address_cells + host_address_cells + size_cells)); 514} 515 516static int 517ofw_pci_fill_ranges(phandle_t node, struct ofw_pci_range *ranges) 518{ 519 int host_address_cells = 1, pci_address_cells = 3, size_cells = 2; 520 cell_t *base_ranges; 521 ssize_t nbase_ranges; 522 int nranges; 523 int i, j, k; 524 525 OF_getencprop(OF_parent(node), "#address-cells", &host_address_cells, 526 sizeof(host_address_cells)); 527 OF_getencprop(node, "#address-cells", &pci_address_cells, 528 sizeof(pci_address_cells)); 529 OF_getencprop(node, "#size-cells", &size_cells, sizeof(size_cells)); 530 531 nbase_ranges = OF_getproplen(node, "ranges"); 532 if (nbase_ranges <= 0) 533 return (-1); 534 nranges = nbase_ranges / sizeof(cell_t) / 535 (pci_address_cells + host_address_cells + size_cells); 536 537 base_ranges = malloc(nbase_ranges, M_DEVBUF, M_WAITOK); 538 OF_getencprop(node, "ranges", base_ranges, nbase_ranges); 539 540 for (i = 0, j = 0; i < nranges; i++) { 541 ranges[i].pci_hi = base_ranges[j++]; 542 ranges[i].pci = 0; 543 for (k = 0; k < pci_address_cells - 1; k++) { 544 ranges[i].pci <<= 32; 545 ranges[i].pci |= base_ranges[j++]; 546 } 547 ranges[i].host = 0; 548 for (k = 0; k < host_address_cells; k++) { 549 ranges[i].host <<= 32; 550 ranges[i].host |= base_ranges[j++]; 551 } 552 ranges[i].size = 0; 553 for (k = 0; k < size_cells; k++) { 554 ranges[i].size <<= 32; 555 ranges[i].size |= base_ranges[j++]; 556 } 557 } 558 559 free(base_ranges, M_DEVBUF); 560 return (nranges); 561} 562 563