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: releng/11.0/sys/dev/ofw/ofwpci.c 297392 2016-03-29 15:19:56Z zbb $"); 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#include <sys/rman.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#include <dev/ofw/ofwpci.h> 42 43#include <dev/pci/pcivar.h> 44#include <dev/pci/pcireg.h> 45 46#include <machine/bus.h> 47#include <machine/md_var.h> 48#include <machine/resource.h> 49 50#include <vm/vm.h> 51#include <vm/pmap.h> 52 53#include "pcib_if.h" 54 55/* 56 * If it is necessary to set another value of this for 57 * some platforms it should be set at fdt.h file 58 */ 59#ifndef PCI_MAP_INTR 60#define PCI_MAP_INTR 4 61#endif 62 63#define PCI_INTR_PINS 4 64 65/* 66 * bus interface. 67 */ 68static struct resource * ofw_pci_alloc_resource(device_t, device_t, 69 int, int *, rman_res_t, rman_res_t, rman_res_t, u_int); 70static int ofw_pci_release_resource(device_t, device_t, int, int, 71 struct resource *); 72static int ofw_pci_activate_resource(device_t, device_t, int, int, 73 struct resource *); 74static int ofw_pci_deactivate_resource(device_t, device_t, int, int, 75 struct resource *); 76static int ofw_pci_adjust_resource(device_t, device_t, int, 77 struct resource *, rman_res_t, rman_res_t); 78 79#ifdef __powerpc__ 80static bus_space_tag_t ofw_pci_bus_get_bus_tag(device_t, device_t); 81#endif 82 83/* 84 * pcib interface 85 */ 86static int ofw_pci_maxslots(device_t); 87 88/* 89 * ofw_bus interface 90 */ 91static phandle_t ofw_pci_get_node(device_t, device_t); 92 93/* 94 * local methods 95 */ 96static int ofw_pci_fill_ranges(phandle_t, struct ofw_pci_range *); 97 98/* 99 * Driver methods. 100 */ 101static device_method_t ofw_pci_methods[] = { 102 103 /* Device interface */ 104 DEVMETHOD(device_attach, ofw_pci_attach), 105 106 /* Bus interface */ 107 DEVMETHOD(bus_print_child, bus_generic_print_child), 108 DEVMETHOD(bus_read_ivar, ofw_pci_read_ivar), 109 DEVMETHOD(bus_write_ivar, ofw_pci_write_ivar), 110 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 111 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 112 DEVMETHOD(bus_alloc_resource, ofw_pci_alloc_resource), 113 DEVMETHOD(bus_release_resource, ofw_pci_release_resource), 114 DEVMETHOD(bus_activate_resource, ofw_pci_activate_resource), 115 DEVMETHOD(bus_deactivate_resource, ofw_pci_deactivate_resource), 116 DEVMETHOD(bus_adjust_resource, ofw_pci_adjust_resource), 117#ifdef __powerpc__ 118 DEVMETHOD(bus_get_bus_tag, ofw_pci_bus_get_bus_tag), 119#endif 120 121 /* pcib interface */ 122 DEVMETHOD(pcib_maxslots, ofw_pci_maxslots), 123 DEVMETHOD(pcib_route_interrupt, ofw_pci_route_interrupt), 124 125 /* ofw_bus interface */ 126 DEVMETHOD(ofw_bus_get_node, ofw_pci_get_node), 127 128 DEVMETHOD_END 129}; 130 131DEFINE_CLASS_0(ofw_pci, ofw_pci_driver, ofw_pci_methods, 0); 132 133int 134ofw_pci_init(device_t dev) 135{ 136 struct ofw_pci_softc *sc; 137 phandle_t node; 138 u_int32_t busrange[2]; 139 struct ofw_pci_range *rp; 140 int error; 141 struct ofw_pci_cell_info *cell_info; 142 143 node = ofw_bus_get_node(dev); 144 sc = device_get_softc(dev); 145 sc->sc_initialized = 1; 146 sc->sc_range = NULL; 147 148 cell_info = (struct ofw_pci_cell_info *)malloc(sizeof(*cell_info), 149 M_DEVBUF, M_WAITOK | M_ZERO); 150 151 sc->sc_cell_info = cell_info; 152 153 if (OF_getencprop(node, "bus-range", busrange, sizeof(busrange)) != 8) 154 busrange[0] = 0; 155 156 sc->sc_dev = dev; 157 sc->sc_node = node; 158 sc->sc_bus = busrange[0]; 159 160 if (sc->sc_quirks & OFW_PCI_QUIRK_RANGES_ON_CHILDREN) { 161 phandle_t c; 162 int n, i; 163 164 sc->sc_nrange = 0; 165 for (c = OF_child(node); c != 0; c = OF_peer(c)) { 166 n = ofw_pci_nranges(c, cell_info); 167 if (n > 0) 168 sc->sc_nrange += n; 169 } 170 if (sc->sc_nrange == 0) { 171 error = ENXIO; 172 goto out; 173 } 174 sc->sc_range = malloc(sc->sc_nrange * sizeof(sc->sc_range[0]), 175 M_DEVBUF, M_WAITOK); 176 i = 0; 177 for (c = OF_child(node); c != 0; c = OF_peer(c)) { 178 n = ofw_pci_fill_ranges(c, &sc->sc_range[i]); 179 if (n > 0) 180 i += n; 181 } 182 KASSERT(i == sc->sc_nrange, ("range count mismatch")); 183 } else { 184 sc->sc_nrange = ofw_pci_nranges(node, cell_info); 185 if (sc->sc_nrange <= 0) { 186 device_printf(dev, "could not getranges\n"); 187 error = ENXIO; 188 goto out; 189 } 190 sc->sc_range = malloc(sc->sc_nrange * sizeof(sc->sc_range[0]), 191 M_DEVBUF, M_WAITOK); 192 ofw_pci_fill_ranges(node, sc->sc_range); 193 } 194 195 sc->sc_io_rman.rm_type = RMAN_ARRAY; 196 sc->sc_io_rman.rm_descr = "PCI I/O Ports"; 197 error = rman_init(&sc->sc_io_rman); 198 if (error) { 199 device_printf(dev, "rman_init() failed. error = %d\n", error); 200 goto out; 201 } 202 203 sc->sc_mem_rman.rm_type = RMAN_ARRAY; 204 sc->sc_mem_rman.rm_descr = "PCI Memory"; 205 error = rman_init(&sc->sc_mem_rman); 206 if (error) { 207 device_printf(dev, "rman_init() failed. error = %d\n", error); 208 goto out; 209 } 210 211 for (rp = sc->sc_range; rp < sc->sc_range + sc->sc_nrange && 212 rp->pci_hi != 0; rp++) { 213 error = 0; 214 215 switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) { 216 case OFW_PCI_PHYS_HI_SPACE_CONFIG: 217 break; 218 case OFW_PCI_PHYS_HI_SPACE_IO: 219 error = rman_manage_region(&sc->sc_io_rman, rp->pci, 220 rp->pci + rp->size - 1); 221 break; 222 case OFW_PCI_PHYS_HI_SPACE_MEM32: 223 case OFW_PCI_PHYS_HI_SPACE_MEM64: 224 error = rman_manage_region(&sc->sc_mem_rman, rp->pci, 225 rp->pci + rp->size - 1); 226 break; 227 } 228 229 if (error) { 230 device_printf(dev, 231 "rman_manage_region(%x, %#jx, %#jx) failed. " 232 "error = %d\n", rp->pci_hi & 233 OFW_PCI_PHYS_HI_SPACEMASK, rp->pci, 234 rp->pci + rp->size - 1, error); 235 goto out; 236 } 237 } 238 239 ofw_bus_setup_iinfo(node, &sc->sc_pci_iinfo, sizeof(cell_t)); 240 return (0); 241 242out: 243 free(cell_info, M_DEVBUF); 244 free(sc->sc_range, M_DEVBUF); 245 rman_fini(&sc->sc_io_rman); 246 rman_fini(&sc->sc_mem_rman); 247 248 return (error); 249} 250 251int 252ofw_pci_attach(device_t dev) 253{ 254 struct ofw_pci_softc *sc; 255 int error; 256 257 sc = device_get_softc(dev); 258 if (!sc->sc_initialized) { 259 error = ofw_pci_init(dev); 260 if (error) 261 return (error); 262 } 263 264 device_add_child(dev, "pci", -1); 265 return (bus_generic_attach(dev)); 266} 267 268static int 269ofw_pci_maxslots(device_t dev) 270{ 271 272 return (PCI_SLOTMAX); 273} 274 275int 276ofw_pci_route_interrupt(device_t bus, device_t dev, int pin) 277{ 278 struct ofw_pci_softc *sc; 279 struct ofw_pci_register reg; 280 uint32_t pintr, mintr[PCI_MAP_INTR]; 281 int intrcells; 282 phandle_t iparent; 283 284 sc = device_get_softc(bus); 285 pintr = pin; 286 287 /* Fabricate imap information in case this isn't an OFW device */ 288 bzero(®, sizeof(reg)); 289 reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) | 290 (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) | 291 (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT); 292 293 intrcells = ofw_bus_lookup_imap(ofw_bus_get_node(dev), 294 &sc->sc_pci_iinfo, ®, sizeof(reg), &pintr, sizeof(pintr), 295 mintr, sizeof(mintr), &iparent); 296 if (intrcells != 0) { 297 pintr = ofw_bus_map_intr(dev, iparent, intrcells, mintr); 298 return (pintr); 299 } 300 301 /* 302 * Maybe it's a real interrupt, not an intpin 303 */ 304 if (pin > PCI_INTR_PINS) 305 return (pin); 306 307 device_printf(bus, "could not route pin %d for device %d.%d\n", 308 pin, pci_get_slot(dev), pci_get_function(dev)); 309 return (PCI_INVALID_IRQ); 310} 311 312int 313ofw_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 314{ 315 struct ofw_pci_softc *sc; 316 317 sc = device_get_softc(dev); 318 319 switch (which) { 320 case PCIB_IVAR_DOMAIN: 321 *result = device_get_unit(dev); 322 return (0); 323 case PCIB_IVAR_BUS: 324 *result = sc->sc_bus; 325 return (0); 326 default: 327 break; 328 } 329 330 return (ENOENT); 331} 332 333int 334ofw_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 335{ 336 struct ofw_pci_softc *sc; 337 338 sc = device_get_softc(dev); 339 340 switch (which) { 341 case PCIB_IVAR_BUS: 342 sc->sc_bus = value; 343 return (0); 344 default: 345 break; 346 } 347 348 return (ENOENT); 349} 350 351int 352ofw_pci_nranges(phandle_t node, struct ofw_pci_cell_info *info) 353{ 354 ssize_t nbase_ranges; 355 356 if (info == NULL) 357 return (-1); 358 359 info->host_address_cells = 1; 360 info->size_cells = 2; 361 info->pci_address_cell = 3; 362 363 OF_getencprop(OF_parent(node), "#address-cells", 364 &(info->host_address_cells), sizeof(info->host_address_cells)); 365 OF_getencprop(node, "#address-cells", 366 &(info->pci_address_cell), sizeof(info->pci_address_cell)); 367 OF_getencprop(node, "#size-cells", &(info->size_cells), 368 sizeof(info->size_cells)); 369 370 nbase_ranges = OF_getproplen(node, "ranges"); 371 if (nbase_ranges <= 0) 372 return (-1); 373 374 return (nbase_ranges / sizeof(cell_t) / 375 (info->pci_address_cell + info->host_address_cells + 376 info->size_cells)); 377} 378 379static struct resource * 380ofw_pci_alloc_resource(device_t bus, device_t child, int type, int *rid, 381 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 382{ 383 struct ofw_pci_softc *sc; 384 struct resource *rv; 385 struct rman *rm; 386 int needactivate; 387 388 needactivate = flags & RF_ACTIVE; 389 flags &= ~RF_ACTIVE; 390 391 sc = device_get_softc(bus); 392 393 switch (type) { 394 case SYS_RES_MEMORY: 395 rm = &sc->sc_mem_rman; 396 break; 397 398 case SYS_RES_IOPORT: 399 rm = &sc->sc_io_rman; 400 break; 401 402 case SYS_RES_IRQ: 403 return (bus_alloc_resource(bus, type, rid, start, end, count, 404 flags)); 405 406 default: 407 device_printf(bus, "unknown resource request from %s\n", 408 device_get_nameunit(child)); 409 return (NULL); 410 } 411 412 rv = rman_reserve_resource(rm, start, end, count, flags, child); 413 if (rv == NULL) { 414 device_printf(bus, "failed to reserve resource for %s\n", 415 device_get_nameunit(child)); 416 return (NULL); 417 } 418 419 rman_set_rid(rv, *rid); 420 421 if (needactivate) { 422 if (bus_activate_resource(child, type, *rid, rv) != 0) { 423 device_printf(bus, 424 "failed to activate resource for %s\n", 425 device_get_nameunit(child)); 426 rman_release_resource(rv); 427 return (NULL); 428 } 429 } 430 431 return (rv); 432} 433 434static int 435ofw_pci_release_resource(device_t bus, device_t child, int type, int rid, 436 struct resource *res) 437{ 438 439 if (rman_get_flags(res) & RF_ACTIVE) { 440 int error = bus_deactivate_resource(child, type, rid, res); 441 if (error) 442 return error; 443 } 444 445 return (rman_release_resource(res)); 446} 447 448static int 449ofw_pci_activate_resource(device_t bus, device_t child, int type, int rid, 450 struct resource *res) 451{ 452 struct ofw_pci_softc *sc; 453 bus_space_handle_t handle; 454 bus_space_tag_t tag; 455 int rv; 456 457 sc = device_get_softc(bus); 458 459 if (type == SYS_RES_IRQ) { 460 return (bus_activate_resource(bus, type, rid, res)); 461 } 462 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 463 struct ofw_pci_range *rp; 464 vm_paddr_t start; 465 int space; 466 467 start = (vm_paddr_t)rman_get_start(res); 468 469 /* 470 * Map this through the ranges list 471 */ 472 for (rp = sc->sc_range; rp < sc->sc_range + sc->sc_nrange && 473 rp->pci_hi != 0; rp++) { 474 if (start < rp->pci || start >= rp->pci + rp->size) 475 continue; 476 477 switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) { 478 case OFW_PCI_PHYS_HI_SPACE_IO: 479 space = SYS_RES_IOPORT; 480 break; 481 case OFW_PCI_PHYS_HI_SPACE_MEM32: 482 case OFW_PCI_PHYS_HI_SPACE_MEM64: 483 space = SYS_RES_MEMORY; 484 break; 485 default: 486 space = -1; 487 } 488 489 if (type == space) { 490 start += (rp->host - rp->pci); 491 break; 492 } 493 } 494 495 if (bootverbose) 496 printf("ofw_pci mapdev: start %jx, len %jd\n", 497 (rman_res_t)start, rman_get_size(res)); 498 499 tag = BUS_GET_BUS_TAG(child, child); 500 if (tag == NULL) 501 return (ENOMEM); 502 503 rman_set_bustag(res, tag); 504 rv = bus_space_map(tag, start, 505 rman_get_size(res), 0, &handle); 506 if (rv != 0) 507 return (ENOMEM); 508 509 rman_set_bushandle(res, handle); 510 rman_set_virtual(res, (void *)handle); /* XXX for powerpc only ? */ 511 } 512 513 return (rman_activate_resource(res)); 514} 515 516#ifdef __powerpc__ 517static bus_space_tag_t 518ofw_pci_bus_get_bus_tag(device_t bus, device_t child) 519{ 520 521 return (&bs_le_tag); 522} 523#endif 524 525static int 526ofw_pci_deactivate_resource(device_t bus, device_t child, int type, int rid, 527 struct resource *res) 528{ 529 530 /* 531 * If this is a memory resource, unmap it. 532 */ 533 if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) { 534 u_int32_t psize; 535 536 psize = rman_get_size(res); 537 pmap_unmapdev((vm_offset_t)rman_get_virtual(res), psize); 538 } 539 540 return (rman_deactivate_resource(res)); 541} 542 543static int 544ofw_pci_adjust_resource(device_t bus, device_t child, int type, 545 struct resource *res, rman_res_t start, rman_res_t end) 546{ 547 struct rman *rm = NULL; 548 struct ofw_pci_softc *sc = device_get_softc(bus); 549 550 KASSERT(!(rman_get_flags(res) & RF_ACTIVE), 551 ("active resources cannot be adjusted")); 552 if (rman_get_flags(res) & RF_ACTIVE) 553 return (EINVAL); 554 555 switch (type) { 556 case SYS_RES_MEMORY: 557 rm = &sc->sc_mem_rman; 558 break; 559 case SYS_RES_IOPORT: 560 rm = &sc->sc_io_rman; 561 break; 562 default: 563 return (ENXIO); 564 } 565 566 if (!rman_is_region_manager(res, rm)) 567 return (EINVAL); 568 569 return (rman_adjust_resource(res, start, end)); 570} 571 572static phandle_t 573ofw_pci_get_node(device_t bus, device_t dev) 574{ 575 struct ofw_pci_softc *sc; 576 577 sc = device_get_softc(bus); 578 /* We only have one child, the PCI bus, which needs our own node. */ 579 580 return (sc->sc_node); 581} 582 583static int 584ofw_pci_fill_ranges(phandle_t node, struct ofw_pci_range *ranges) 585{ 586 int host_address_cells = 1, pci_address_cells = 3, size_cells = 2; 587 cell_t *base_ranges; 588 ssize_t nbase_ranges; 589 int nranges; 590 int i, j, k; 591 592 OF_getencprop(OF_parent(node), "#address-cells", &host_address_cells, 593 sizeof(host_address_cells)); 594 OF_getencprop(node, "#address-cells", &pci_address_cells, 595 sizeof(pci_address_cells)); 596 OF_getencprop(node, "#size-cells", &size_cells, sizeof(size_cells)); 597 598 nbase_ranges = OF_getproplen(node, "ranges"); 599 if (nbase_ranges <= 0) 600 return (-1); 601 nranges = nbase_ranges / sizeof(cell_t) / 602 (pci_address_cells + host_address_cells + size_cells); 603 604 base_ranges = malloc(nbase_ranges, M_DEVBUF, M_WAITOK); 605 OF_getencprop(node, "ranges", base_ranges, nbase_ranges); 606 607 for (i = 0, j = 0; i < nranges; i++) { 608 ranges[i].pci_hi = base_ranges[j++]; 609 ranges[i].pci = 0; 610 for (k = 0; k < pci_address_cells - 1; k++) { 611 ranges[i].pci <<= 32; 612 ranges[i].pci |= base_ranges[j++]; 613 } 614 ranges[i].host = 0; 615 for (k = 0; k < host_address_cells; k++) { 616 ranges[i].host <<= 32; 617 ranges[i].host |= base_ranges[j++]; 618 } 619 ranges[i].size = 0; 620 for (k = 0; k < size_cells; k++) { 621 ranges[i].size <<= 32; 622 ranges[i].size |= base_ranges[j++]; 623 } 624 } 625 626 free(base_ranges, M_DEVBUF); 627 return (nranges); 628} 629