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sys/dev/pci/pci.c
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1 /* 2 * Copyright (c) 1997, Stefan Esser <se@freebsd.org> 3 * Copyright (c) 2000, Michael Smith <msmith@freebsd.org> 4 * Copyright (c) 2000, BSDi 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice unmodified, this list of conditions, and the following 12 * 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 * 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, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD: releng/5.2/sys/dev/pci/pci.c 122849 2003-11-17 08:58:16Z peter $ 29 * 30 */ 31 32 #include "opt_bus.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/malloc.h> 37 #include <sys/module.h> 38 #include <sys/linker.h> 39 #include <sys/fcntl.h> 40 #include <sys/conf.h> 41 #include <sys/kernel.h> 42 #include <sys/queue.h> 43 #include <sys/sysctl.h> 44 #include <sys/types.h> 45 46 #include <vm/vm.h> 47 #include <vm/pmap.h> 48 #include <vm/vm_extern.h> 49 50 #include <sys/bus.h> 51 #include <machine/bus.h> 52 #include <sys/rman.h> 53 #include <machine/resource.h> 54 55 #include <sys/pciio.h> 56 #include <dev/pci/pcireg.h> 57 #include <dev/pci/pcivar.h> 58 #include <dev/pci/pci_private.h> 59 60 #include "pcib_if.h" 61 #include "pci_if.h" 62 63 static uint32_t pci_mapbase(unsigned mapreg); 64 static int pci_maptype(unsigned mapreg); 65 static int pci_mapsize(unsigned testval); 66 static int pci_maprange(unsigned mapreg); 67 static void pci_fixancient(pcicfgregs *cfg); 68 69 static int pci_porten(device_t pcib, int b, int s, int f); 70 static int pci_memen(device_t pcib, int b, int s, int f); 71 static int pci_add_map(device_t pcib, int b, int s, int f, int reg, 72 struct resource_list *rl); 73 static void pci_add_resources(device_t pcib, device_t bus, 74 device_t dev); 75 static int pci_probe(device_t dev); 76 static int pci_attach(device_t dev); 77 static void pci_load_vendor_data(void); 78 static int pci_describe_parse_line(char **ptr, int *vendor, 79 int *device, char **desc); 80 static char *pci_describe_device(device_t dev); 81 static int pci_modevent(module_t mod, int what, void *arg); 82 static void pci_hdrtypedata(device_t pcib, int b, int s, int f, 83 pcicfgregs *cfg); 84 static void pci_read_extcap(device_t pcib, pcicfgregs *cfg); 85 86 static device_method_t pci_methods[] = { 87 /* Device interface */ 88 DEVMETHOD(device_probe, pci_probe), 89 DEVMETHOD(device_attach, pci_attach), 90 DEVMETHOD(device_shutdown, bus_generic_shutdown), 91 DEVMETHOD(device_suspend, bus_generic_suspend), 92 DEVMETHOD(device_resume, pci_resume), 93 94 /* Bus interface */ 95 DEVMETHOD(bus_print_child, pci_print_child), 96 DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch), 97 DEVMETHOD(bus_read_ivar, pci_read_ivar), 98 DEVMETHOD(bus_write_ivar, pci_write_ivar), 99 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 100 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 101 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 102 103 DEVMETHOD(bus_get_resource_list,pci_get_resource_list), 104 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 105 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 106 DEVMETHOD(bus_delete_resource, pci_delete_resource), 107 DEVMETHOD(bus_alloc_resource, pci_alloc_resource), 108 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 109 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 110 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 111 DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method), 112 DEVMETHOD(bus_child_location_str, pci_child_location_str_method), 113 114 /* PCI interface */ 115 DEVMETHOD(pci_read_config, pci_read_config_method), 116 DEVMETHOD(pci_write_config, pci_write_config_method), 117 DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method), 118 DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method), 119 DEVMETHOD(pci_enable_io, pci_enable_io_method), 120 DEVMETHOD(pci_disable_io, pci_disable_io_method), 121 DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method), 122 DEVMETHOD(pci_set_powerstate, pci_set_powerstate_method), 123 DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_method), 124 125 { 0, 0 } 126 }; 127 128 DEFINE_CLASS_0(pci, pci_driver, pci_methods, 0); 129 130 devclass_t pci_devclass; 131 DRIVER_MODULE(pci, pcib, pci_driver, pci_devclass, pci_modevent, 0); 132 MODULE_VERSION(pci, 1); 133 134 static char *pci_vendordata; 135 static size_t pci_vendordata_size; 136 137 138 struct pci_quirk { 139 uint32_t devid; /* Vendor/device of the card */ 140 int type; 141 #define PCI_QUIRK_MAP_REG 1 /* PCI map register in weird place */ 142 int arg1; 143 int arg2; 144 }; 145 146 struct pci_quirk pci_quirks[] = { 147 /* The Intel 82371AB and 82443MX has a map register at offset 0x90. */ 148 { 0x71138086, PCI_QUIRK_MAP_REG, 0x90, 0 }, 149 { 0x719b8086, PCI_QUIRK_MAP_REG, 0x90, 0 }, 150 /* As does the Serverworks OSB4 (the SMBus mapping register) */ 151 { 0x02001166, PCI_QUIRK_MAP_REG, 0x90, 0 }, 152 153 { 0 } 154 }; 155 156 /* map register information */ 157 #define PCI_MAPMEM 0x01 /* memory map */ 158 #define PCI_MAPMEMP 0x02 /* prefetchable memory map */ 159 #define PCI_MAPPORT 0x04 /* port map */ 160 161 struct devlist pci_devq; 162 uint32_t pci_generation; 163 uint32_t pci_numdevs = 0; 164 165 /* sysctl vars */ 166 SYSCTL_NODE(_hw, OID_AUTO, pci, CTLFLAG_RD, 0, "PCI bus tuning parameters"); 167 168 static int pci_enable_io_modes = 1; 169 TUNABLE_INT("hw.pci.enable_io_modes", (int *)&pci_enable_io_modes); 170 SYSCTL_INT(_hw_pci, OID_AUTO, enable_io_modes, CTLFLAG_RW, 171 &pci_enable_io_modes, 1, 172 "Enable I/O and memory bits in the config register. Some BIOSes do not\n\ 173 enable these bits correctly. We'd like to do this all the time, but there\n\ 174 are some peripherals that this causes problems with."); 175 176 /* Find a device_t by bus/slot/function */ 177 178 device_t 179 pci_find_bsf(uint8_t bus, uint8_t slot, uint8_t func) 180 { 181 struct pci_devinfo *dinfo; 182 183 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) { 184 if ((dinfo->cfg.bus == bus) && 185 (dinfo->cfg.slot == slot) && 186 (dinfo->cfg.func == func)) { 187 return (dinfo->cfg.dev); 188 } 189 } 190 191 return (NULL); 192 } 193 194 /* Find a device_t by vendor/device ID */ 195 196 device_t 197 pci_find_device(uint16_t vendor, uint16_t device) 198 { 199 struct pci_devinfo *dinfo; 200 201 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) { 202 if ((dinfo->cfg.vendor == vendor) && 203 (dinfo->cfg.device == device)) { 204 return (dinfo->cfg.dev); 205 } 206 } 207 208 return (NULL); 209 } 210 211 /* return base address of memory or port map */ 212 213 static uint32_t 214 pci_mapbase(unsigned mapreg) 215 { 216 int mask = 0x03; 217 if ((mapreg & 0x01) == 0) 218 mask = 0x0f; 219 return (mapreg & ~mask); 220 } 221 222 /* return map type of memory or port map */ 223 224 static int 225 pci_maptype(unsigned mapreg) 226 { 227 static uint8_t maptype[0x10] = { 228 PCI_MAPMEM, PCI_MAPPORT, 229 PCI_MAPMEM, 0, 230 PCI_MAPMEM, PCI_MAPPORT, 231 0, 0, 232 PCI_MAPMEM|PCI_MAPMEMP, PCI_MAPPORT, 233 PCI_MAPMEM|PCI_MAPMEMP, 0, 234 PCI_MAPMEM|PCI_MAPMEMP, PCI_MAPPORT, 235 0, 0, 236 }; 237 238 return maptype[mapreg & 0x0f]; 239 } 240 241 /* return log2 of map size decoded for memory or port map */ 242 243 static int 244 pci_mapsize(unsigned testval) 245 { 246 int ln2size; 247 248 testval = pci_mapbase(testval); 249 ln2size = 0; 250 if (testval != 0) { 251 while ((testval & 1) == 0) 252 { 253 ln2size++; 254 testval >>= 1; 255 } 256 } 257 return (ln2size); 258 } 259 260 /* return log2 of address range supported by map register */ 261 262 static int 263 pci_maprange(unsigned mapreg) 264 { 265 int ln2range = 0; 266 switch (mapreg & 0x07) { 267 case 0x00: 268 case 0x01: 269 case 0x05: 270 ln2range = 32; 271 break; 272 case 0x02: 273 ln2range = 20; 274 break; 275 case 0x04: 276 ln2range = 64; 277 break; 278 } 279 return (ln2range); 280 } 281 282 /* adjust some values from PCI 1.0 devices to match 2.0 standards ... */ 283 284 static void 285 pci_fixancient(pcicfgregs *cfg) 286 { 287 if (cfg->hdrtype != 0) 288 return; 289 290 /* PCI to PCI bridges use header type 1 */ 291 if (cfg->baseclass == PCIC_BRIDGE && cfg->subclass == PCIS_BRIDGE_PCI) 292 cfg->hdrtype = 1; 293 } 294 295 /* extract header type specific config data */ 296 297 static void 298 pci_hdrtypedata(device_t pcib, int b, int s, int f, pcicfgregs *cfg) 299 { 300 #define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w) 301 switch (cfg->hdrtype) { 302 case 0: 303 cfg->subvendor = REG(PCIR_SUBVEND_0, 2); 304 cfg->subdevice = REG(PCIR_SUBDEV_0, 2); 305 cfg->nummaps = PCI_MAXMAPS_0; 306 break; 307 case 1: 308 cfg->subvendor = REG(PCIR_SUBVEND_1, 2); 309 cfg->subdevice = REG(PCIR_SUBDEV_1, 2); 310 cfg->nummaps = PCI_MAXMAPS_1; 311 break; 312 case 2: 313 cfg->subvendor = REG(PCIR_SUBVEND_2, 2); 314 cfg->subdevice = REG(PCIR_SUBDEV_2, 2); 315 cfg->nummaps = PCI_MAXMAPS_2; 316 break; 317 } 318 #undef REG 319 } 320 321 /* read configuration header into pcicfgregs structure */ 322 323 struct pci_devinfo * 324 pci_read_device(device_t pcib, int b, int s, int f, size_t size) 325 { 326 #define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w) 327 pcicfgregs *cfg = NULL; 328 struct pci_devinfo *devlist_entry; 329 struct devlist *devlist_head; 330 331 devlist_head = &pci_devq; 332 333 devlist_entry = NULL; 334 335 if (REG(PCIR_DEVVENDOR, 4) != -1) { 336 devlist_entry = malloc(size, M_DEVBUF, M_WAITOK | M_ZERO); 337 if (devlist_entry == NULL) 338 return (NULL); 339 340 cfg = &devlist_entry->cfg; 341 342 cfg->bus = b; 343 cfg->slot = s; 344 cfg->func = f; 345 cfg->vendor = REG(PCIR_VENDOR, 2); 346 cfg->device = REG(PCIR_DEVICE, 2); 347 cfg->cmdreg = REG(PCIR_COMMAND, 2); 348 cfg->statreg = REG(PCIR_STATUS, 2); 349 cfg->baseclass = REG(PCIR_CLASS, 1); 350 cfg->subclass = REG(PCIR_SUBCLASS, 1); 351 cfg->progif = REG(PCIR_PROGIF, 1); 352 cfg->revid = REG(PCIR_REVID, 1); 353 cfg->hdrtype = REG(PCIR_HDRTYPE, 1); 354 cfg->cachelnsz = REG(PCIR_CACHELNSZ, 1); 355 cfg->lattimer = REG(PCIR_LATTIMER, 1); 356 cfg->intpin = REG(PCIR_INTPIN, 1); 357 cfg->intline = REG(PCIR_INTLINE, 1); 358 359 cfg->mingnt = REG(PCIR_MINGNT, 1); 360 cfg->maxlat = REG(PCIR_MAXLAT, 1); 361 362 cfg->mfdev = (cfg->hdrtype & PCIM_MFDEV) != 0; 363 cfg->hdrtype &= ~PCIM_MFDEV; 364 365 pci_fixancient(cfg); 366 pci_hdrtypedata(pcib, b, s, f, cfg); 367 368 if (REG(PCIR_STATUS, 2) & PCIM_STATUS_CAPPRESENT) 369 pci_read_extcap(pcib, cfg); 370 371 STAILQ_INSERT_TAIL(devlist_head, devlist_entry, pci_links); 372 373 devlist_entry->conf.pc_sel.pc_bus = cfg->bus; 374 devlist_entry->conf.pc_sel.pc_dev = cfg->slot; 375 devlist_entry->conf.pc_sel.pc_func = cfg->func; 376 devlist_entry->conf.pc_hdr = cfg->hdrtype; 377 378 devlist_entry->conf.pc_subvendor = cfg->subvendor; 379 devlist_entry->conf.pc_subdevice = cfg->subdevice; 380 devlist_entry->conf.pc_vendor = cfg->vendor; 381 devlist_entry->conf.pc_device = cfg->device; 382 383 devlist_entry->conf.pc_class = cfg->baseclass; 384 devlist_entry->conf.pc_subclass = cfg->subclass; 385 devlist_entry->conf.pc_progif = cfg->progif; 386 devlist_entry->conf.pc_revid = cfg->revid; 387 388 pci_numdevs++; 389 pci_generation++; 390 } 391 return (devlist_entry); 392 #undef REG 393 } 394 395 static void 396 pci_read_extcap(device_t pcib, pcicfgregs *cfg) 397 { 398 #define REG(n, w) PCIB_READ_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, w) 399 int ptr, nextptr, ptrptr; 400 401 switch (cfg->hdrtype & PCIM_HDRTYPE) { 402 case 0: 403 ptrptr = PCIR_CAP_PTR; 404 break; 405 case 2: 406 ptrptr = 0x14; 407 break; 408 default: 409 return; /* no extended capabilities support */ 410 } 411 nextptr = REG(ptrptr, 1); /* sanity check? */ 412 413 /* 414 * Read capability entries. 415 */ 416 while (nextptr != 0) { 417 /* Sanity check */ 418 if (nextptr > 255) { 419 printf("illegal PCI extended capability offset %d\n", 420 nextptr); 421 return; 422 } 423 /* Find the next entry */ 424 ptr = nextptr; 425 nextptr = REG(ptr + 1, 1); 426 427 /* Process this entry */ 428 switch (REG(ptr, 1)) { 429 case PCIY_PMG: /* PCI power management */ 430 if (cfg->pp.pp_cap == 0) { 431 cfg->pp.pp_cap = REG(ptr + PCIR_POWER_CAP, 2); 432 cfg->pp.pp_status = ptr + PCIR_POWER_STATUS; 433 cfg->pp.pp_pmcsr = ptr + PCIR_POWER_PMCSR; 434 if ((nextptr - ptr) > PCIR_POWER_DATA) 435 cfg->pp.pp_data = ptr + PCIR_POWER_DATA; 436 } 437 break; 438 case PCIY_MSI: /* PCI MSI */ 439 cfg->msi.msi_ctrl = REG(ptr + PCIR_MSI_CTRL, 2); 440 if (cfg->msi.msi_ctrl & PCIM_MSICTRL_64BIT) 441 cfg->msi.msi_data = PCIR_MSI_DATA_64BIT; 442 else 443 cfg->msi.msi_data = PCIR_MSI_DATA; 444 cfg->msi.msi_msgnum = 1 << ((cfg->msi.msi_ctrl & 445 PCIM_MSICTRL_MMC_MASK)>>1); 446 default: 447 break; 448 } 449 } 450 #undef REG 451 } 452 453 /* free pcicfgregs structure and all depending data structures */ 454 455 int 456 pci_freecfg(struct pci_devinfo *dinfo) 457 { 458 struct devlist *devlist_head; 459 460 devlist_head = &pci_devq; 461 462 STAILQ_REMOVE(devlist_head, dinfo, pci_devinfo, pci_links); 463 free(dinfo, M_DEVBUF); 464 465 /* increment the generation count */ 466 pci_generation++; 467 468 /* we're losing one device */ 469 pci_numdevs--; 470 return (0); 471 } 472 473 /* 474 * PCI power manangement 475 */ 476 int 477 pci_set_powerstate_method(device_t dev, device_t child, int state) 478 { 479 struct pci_devinfo *dinfo = device_get_ivars(child); 480 pcicfgregs *cfg = &dinfo->cfg; 481 uint16_t status; 482 int result; 483 484 if (cfg->pp.pp_cap != 0) { 485 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2) 486 & ~PCIM_PSTAT_DMASK; 487 result = 0; 488 switch (state) { 489 case PCI_POWERSTATE_D0: 490 status |= PCIM_PSTAT_D0; 491 break; 492 case PCI_POWERSTATE_D1: 493 if (cfg->pp.pp_cap & PCIM_PCAP_D1SUPP) { 494 status |= PCIM_PSTAT_D1; 495 } else { 496 result = EOPNOTSUPP; 497 } 498 break; 499 case PCI_POWERSTATE_D2: 500 if (cfg->pp.pp_cap & PCIM_PCAP_D2SUPP) { 501 status |= PCIM_PSTAT_D2; 502 } else { 503 result = EOPNOTSUPP; 504 } 505 break; 506 case PCI_POWERSTATE_D3: 507 status |= PCIM_PSTAT_D3; 508 break; 509 default: 510 result = EINVAL; 511 } 512 if (result == 0) 513 PCI_WRITE_CONFIG(dev, child, cfg->pp.pp_status, status, 514 2); 515 } else { 516 result = ENXIO; 517 } 518 return(result); 519 } 520 521 int 522 pci_get_powerstate_method(device_t dev, device_t child) 523 { 524 struct pci_devinfo *dinfo = device_get_ivars(child); 525 pcicfgregs *cfg = &dinfo->cfg; 526 uint16_t status; 527 int result; 528 529 if (cfg->pp.pp_cap != 0) { 530 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2); 531 switch (status & PCIM_PSTAT_DMASK) { 532 case PCIM_PSTAT_D0: 533 result = PCI_POWERSTATE_D0; 534 break; 535 case PCIM_PSTAT_D1: 536 result = PCI_POWERSTATE_D1; 537 break; 538 case PCIM_PSTAT_D2: 539 result = PCI_POWERSTATE_D2; 540 break; 541 case PCIM_PSTAT_D3: 542 result = PCI_POWERSTATE_D3; 543 break; 544 default: 545 result = PCI_POWERSTATE_UNKNOWN; 546 break; 547 } 548 } else { 549 /* No support, device is always at D0 */ 550 result = PCI_POWERSTATE_D0; 551 } 552 return(result); 553 } 554 555 /* 556 * Some convenience functions for PCI device drivers. 557 */ 558 559 static __inline void 560 pci_set_command_bit(device_t dev, device_t child, uint16_t bit) 561 { 562 uint16_t command; 563 564 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2); 565 command |= bit; 566 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2); 567 } 568 569 static __inline void 570 pci_clear_command_bit(device_t dev, device_t child, uint16_t bit) 571 { 572 uint16_t command; 573 574 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2); 575 command &= ~bit; 576 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2); 577 } 578 579 int 580 pci_enable_busmaster_method(device_t dev, device_t child) 581 { 582 pci_set_command_bit(dev, child, PCIM_CMD_BUSMASTEREN); 583 return (0); 584 } 585 586 int 587 pci_disable_busmaster_method(device_t dev, device_t child) 588 { 589 pci_clear_command_bit(dev, child, PCIM_CMD_BUSMASTEREN); 590 return (0); 591 } 592 593 int 594 pci_enable_io_method(device_t dev, device_t child, int space) 595 { 596 uint16_t command; 597 uint16_t bit; 598 char *error; 599 600 bit = 0; 601 error = NULL; 602 603 switch(space) { 604 case SYS_RES_IOPORT: 605 bit = PCIM_CMD_PORTEN; 606 error = "port"; 607 break; 608 case SYS_RES_MEMORY: 609 bit = PCIM_CMD_MEMEN; 610 error = "memory"; 611 break; 612 default: 613 return (EINVAL); 614 } 615 pci_set_command_bit(dev, child, bit); 616 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2); 617 if (command & bit) 618 return (0); 619 device_printf(child, "failed to enable %s mapping!\n", error); 620 return (ENXIO); 621 } 622 623 int 624 pci_disable_io_method(device_t dev, device_t child, int space) 625 { 626 uint16_t command; 627 uint16_t bit; 628 char *error; 629 630 bit = 0; 631 error = NULL; 632 633 switch(space) { 634 case SYS_RES_IOPORT: 635 bit = PCIM_CMD_PORTEN; 636 error = "port"; 637 break; 638 case SYS_RES_MEMORY: 639 bit = PCIM_CMD_MEMEN; 640 error = "memory"; 641 break; 642 default: 643 return (EINVAL); 644 } 645 pci_clear_command_bit(dev, child, bit); 646 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2); 647 if (command & bit) { 648 device_printf(child, "failed to disable %s mapping!\n", error); 649 return (ENXIO); 650 } 651 return (0); 652 } 653 654 /* 655 * New style pci driver. Parent device is either a pci-host-bridge or a 656 * pci-pci-bridge. Both kinds are represented by instances of pcib. 657 */ 658 659 void 660 pci_print_verbose(struct pci_devinfo *dinfo) 661 { 662 if (bootverbose) { 663 pcicfgregs *cfg = &dinfo->cfg; 664 665 printf("found->\tvendor=0x%04x, dev=0x%04x, revid=0x%02x\n", 666 cfg->vendor, cfg->device, cfg->revid); 667 printf("\tbus=%d, slot=%d, func=%d\n", 668 cfg->bus, cfg->slot, cfg->func); 669 printf("\tclass=%02x-%02x-%02x, hdrtype=0x%02x, mfdev=%d\n", 670 cfg->baseclass, cfg->subclass, cfg->progif, cfg->hdrtype, 671 cfg->mfdev); 672 printf("\tcmdreg=0x%04x, statreg=0x%04x, cachelnsz=%d (dwords)\n", 673 cfg->cmdreg, cfg->statreg, cfg->cachelnsz); 674 printf("\tlattimer=0x%02x (%d ns), mingnt=0x%02x (%d ns), maxlat=0x%02x (%d ns)\n", 675 cfg->lattimer, cfg->lattimer * 30, cfg->mingnt, 676 cfg->mingnt * 250, cfg->maxlat, cfg->maxlat * 250); 677 if (cfg->intpin > 0) 678 printf("\tintpin=%c, irq=%d\n", 679 cfg->intpin +'a' -1, cfg->intline); 680 if (cfg->pp.pp_cap) { 681 uint16_t status; 682 683 status = pci_read_config(cfg->dev, cfg->pp.pp_status, 2); 684 printf("\tpowerspec %d supports D0%s%s D3 current D%d\n", 685 cfg->pp.pp_cap & PCIM_PCAP_SPEC, 686 cfg->pp.pp_cap & PCIM_PCAP_D1SUPP ? " D1" : "", 687 cfg->pp.pp_cap & PCIM_PCAP_D2SUPP ? " D2" : "", 688 status & PCIM_PSTAT_DMASK); 689 } 690 if (cfg->msi.msi_data) { 691 int ctrl; 692 693 ctrl = cfg->msi.msi_ctrl; 694 printf("\tMSI supports %d message%s%s%s\n", 695 cfg->msi.msi_msgnum, 696 (cfg->msi.msi_msgnum == 1) ? "" : "s", 697 (ctrl & PCIM_MSICTRL_64BIT) ? ", 64 bit" : "", 698 (ctrl & PCIM_MSICTRL_VECTOR) ? ", vector masks":""); 699 } 700 } 701 } 702 703 static int 704 pci_porten(device_t pcib, int b, int s, int f) 705 { 706 return (PCIB_READ_CONFIG(pcib, b, s, f, PCIR_COMMAND, 2) 707 & PCIM_CMD_PORTEN) != 0; 708 } 709 710 static int 711 pci_memen(device_t pcib, int b, int s, int f) 712 { 713 return (PCIB_READ_CONFIG(pcib, b, s, f, PCIR_COMMAND, 2) 714 & PCIM_CMD_MEMEN) != 0; 715 } 716 717 /* 718 * Add a resource based on a pci map register. Return 1 if the map 719 * register is a 32bit map register or 2 if it is a 64bit register. 720 */ 721 static int 722 pci_add_map(device_t pcib, int b, int s, int f, int reg, 723 struct resource_list *rl) 724 { 725 uint32_t map; 726 uint64_t base; 727 uint8_t ln2size; 728 uint8_t ln2range; 729 uint32_t testval; 730 uint16_t cmd; 731 int type; 732 733 map = PCIB_READ_CONFIG(pcib, b, s, f, reg, 4); 734 735 if (map == 0 || map == 0xffffffff) 736 return (1); /* skip invalid entry */ 737 738 PCIB_WRITE_CONFIG(pcib, b, s, f, reg, 0xffffffff, 4); 739 testval = PCIB_READ_CONFIG(pcib, b, s, f, reg, 4); 740 PCIB_WRITE_CONFIG(pcib, b, s, f, reg, map, 4); 741 742 base = pci_mapbase(map); 743 if (pci_maptype(map) & PCI_MAPMEM) 744 type = SYS_RES_MEMORY; 745 else 746 type = SYS_RES_IOPORT; 747 ln2size = pci_mapsize(testval); 748 ln2range = pci_maprange(testval); 749 if (ln2range == 64) { 750 /* Read the other half of a 64bit map register */ 751 base |= (uint64_t) PCIB_READ_CONFIG(pcib, b, s, f, reg + 4, 4) << 32; 752 } 753 754 if (bootverbose) { 755 printf("\tmap[%02x]: type %x, range %2d, base %08x, size %2d", 756 reg, pci_maptype(map), ln2range, 757 (unsigned int) base, ln2size); 758 if (type == SYS_RES_IOPORT && !pci_porten(pcib, b, s, f)) 759 printf(", port disabled\n"); 760 else if (type == SYS_RES_MEMORY && !pci_memen(pcib, b, s, f)) 761 printf(", memory disabled\n"); 762 else 763 printf(", enabled\n"); 764 } 765 766 /* 767 * This code theoretically does the right thing, but has 768 * undesirable side effects in some cases where 769 * peripherals respond oddly to having these bits 770 * enabled. Leave them alone by default. 771 */ 772 if (pci_enable_io_modes) { 773 /* Turn on resources that have been left off by a lazy BIOS */ 774 if (type == SYS_RES_IOPORT && !pci_porten(pcib, b, s, f)) { 775 cmd = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_COMMAND, 2); 776 cmd |= PCIM_CMD_PORTEN; 777 PCIB_WRITE_CONFIG(pcib, b, s, f, PCIR_COMMAND, cmd, 2); 778 } 779 if (type == SYS_RES_MEMORY && !pci_memen(pcib, b, s, f)) { 780 cmd = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_COMMAND, 2); 781 cmd |= PCIM_CMD_MEMEN; 782 PCIB_WRITE_CONFIG(pcib, b, s, f, PCIR_COMMAND, cmd, 2); 783 } 784 } else { 785 if (type == SYS_RES_IOPORT && !pci_porten(pcib, b, s, f)) 786 return (1); 787 if (type == SYS_RES_MEMORY && !pci_memen(pcib, b, s, f)) 788 return (1); 789 } 790 resource_list_add(rl, type, reg, base, base + (1 << ln2size) - 1, 791 (1 << ln2size)); 792 793 return ((ln2range == 64) ? 2 : 1); 794 } 795 796 static void 797 pci_add_resources(device_t pcib, device_t bus, device_t dev) 798 { 799 struct pci_devinfo *dinfo = device_get_ivars(dev); 800 pcicfgregs *cfg = &dinfo->cfg; 801 struct resource_list *rl = &dinfo->resources; 802 struct pci_quirk *q; 803 int b, i, irq, f, s; 804 805 b = cfg->bus; 806 s = cfg->slot; 807 f = cfg->func; 808 for (i = 0; i < cfg->nummaps;) { 809 i += pci_add_map(pcib, b, s, f, PCIR_BAR(i), rl); 810 } 811 812 for (q = &pci_quirks[0]; q->devid; q++) { 813 if (q->devid == ((cfg->device << 16) | cfg->vendor) 814 && q->type == PCI_QUIRK_MAP_REG) 815 pci_add_map(pcib, b, s, f, q->arg1, rl); 816 } 817 818 if (cfg->intpin > 0 && PCI_INTERRUPT_VALID(cfg->intline)) { 819 #if defined(__ia64__) || defined(__i386__) || defined(__amd64__) 820 /* 821 * Try to re-route interrupts. Sometimes the BIOS or 822 * firmware may leave bogus values in these registers. 823 * If the re-route fails, then just stick with what we 824 * have. 825 */ 826 irq = PCI_ASSIGN_INTERRUPT(bus, dev); 827 if (PCI_INTERRUPT_VALID(irq)) { 828 pci_write_config(dev, PCIR_INTLINE, irq, 1); 829 cfg->intline = irq; 830 } else 831 #endif 832 irq = cfg->intline; 833 resource_list_add(rl, SYS_RES_IRQ, 0, irq, irq, 1); 834 } 835 } 836 837 void 838 pci_add_children(device_t dev, int busno, size_t dinfo_size) 839 { 840 #define REG(n, w) PCIB_READ_CONFIG(pcib, busno, s, f, n, w) 841 device_t pcib = device_get_parent(dev); 842 struct pci_devinfo *dinfo; 843 int maxslots; 844 int s, f, pcifunchigh; 845 uint8_t hdrtype; 846 847 KASSERT(dinfo_size >= sizeof(struct pci_devinfo), 848 ("dinfo_size too small")); 849 maxslots = PCIB_MAXSLOTS(pcib); 850 for (s = 0; s <= maxslots; s++) { 851 pcifunchigh = 0; 852 f = 0; 853 hdrtype = REG(PCIR_HDRTYPE, 1); 854 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE) 855 continue; 856 if (hdrtype & PCIM_MFDEV) 857 pcifunchigh = PCI_FUNCMAX; 858 for (f = 0; f <= pcifunchigh; f++) { 859 dinfo = pci_read_device(pcib, busno, s, f, dinfo_size); 860 if (dinfo != NULL) { 861 pci_add_child(dev, dinfo); 862 } 863 } 864 } 865 #undef REG 866 } 867 868 void 869 pci_add_child(device_t bus, struct pci_devinfo *dinfo) 870 { 871 device_t pcib; 872 873 pcib = device_get_parent(bus); 874 dinfo->cfg.dev = device_add_child(bus, NULL, -1); 875 device_set_ivars(dinfo->cfg.dev, dinfo); 876 pci_add_resources(pcib, bus, dinfo->cfg.dev); 877 pci_print_verbose(dinfo); 878 } 879 880 static int 881 pci_probe(device_t dev) 882 { 883 884 device_set_desc(dev, "PCI bus"); 885 886 /* Allow other subclasses to override this driver. */ 887 return (-1000); 888 } 889 890 static int 891 pci_attach(device_t dev) 892 { 893 int busno; 894 895 /* 896 * Since there can be multiple independantly numbered PCI 897 * busses on some large alpha systems, we can't use the unit 898 * number to decide what bus we are probing. We ask the parent 899 * pcib what our bus number is. 900 */ 901 busno = pcib_get_bus(dev); 902 if (bootverbose) 903 device_printf(dev, "physical bus=%d\n", busno); 904 905 pci_add_children(dev, busno, sizeof(struct pci_devinfo)); 906 907 return (bus_generic_attach(dev)); 908 } 909 910 static void 911 pci_load_vendor_data(void) 912 { 913 caddr_t vendordata, info; 914 915 if ((vendordata = preload_search_by_type("pci_vendor_data")) != NULL) { 916 info = preload_search_info(vendordata, MODINFO_ADDR); 917 pci_vendordata = *(char **)info; 918 info = preload_search_info(vendordata, MODINFO_SIZE); 919 pci_vendordata_size = *(size_t *)info; 920 /* terminate the database */ 921 pci_vendordata[pci_vendordata_size] = '\n'; 922 } 923 } 924 925 int 926 pci_print_child(device_t dev, device_t child) 927 { 928 struct pci_devinfo *dinfo; 929 struct resource_list *rl; 930 int retval = 0; 931 932 dinfo = device_get_ivars(child); 933 rl = &dinfo->resources; 934 935 retval += bus_print_child_header(dev, child); 936 937 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 938 retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx"); 939 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 940 if (device_get_flags(dev)) 941 retval += printf(" flags %#x", device_get_flags(dev)); 942 943 retval += printf(" at device %d.%d", pci_get_slot(child), 944 pci_get_function(child)); 945 946 retval += bus_print_child_footer(dev, child); 947 948 return (retval); 949 } 950 951 static struct 952 { 953 int class; 954 int subclass; 955 char *desc; 956 } pci_nomatch_tab[] = { 957 {PCIC_OLD, -1, "old"}, 958 {PCIC_OLD, PCIS_OLD_NONVGA, "non-VGA display device"}, 959 {PCIC_OLD, PCIS_OLD_VGA, "VGA-compatible display device"}, 960 {PCIC_STORAGE, -1, "mass storage"}, 961 {PCIC_STORAGE, PCIS_STORAGE_SCSI, "SCSI"}, 962 {PCIC_STORAGE, PCIS_STORAGE_IDE, "ATA"}, 963 {PCIC_STORAGE, PCIS_STORAGE_FLOPPY, "floppy disk"}, 964 {PCIC_STORAGE, PCIS_STORAGE_IPI, "IPI"}, 965 {PCIC_STORAGE, PCIS_STORAGE_RAID, "RAID"}, 966 {PCIC_NETWORK, -1, "network"}, 967 {PCIC_NETWORK, PCIS_NETWORK_ETHERNET, "ethernet"}, 968 {PCIC_NETWORK, PCIS_NETWORK_TOKENRING, "token ring"}, 969 {PCIC_NETWORK, PCIS_NETWORK_FDDI, "fddi"}, 970 {PCIC_NETWORK, PCIS_NETWORK_ATM, "ATM"}, 971 {PCIC_DISPLAY, -1, "display"}, 972 {PCIC_DISPLAY, PCIS_DISPLAY_VGA, "VGA"}, 973 {PCIC_DISPLAY, PCIS_DISPLAY_XGA, "XGA"}, 974 {PCIC_MULTIMEDIA, -1, "multimedia"}, 975 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_VIDEO, "video"}, 976 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_AUDIO, "audio"}, 977 {PCIC_MEMORY, -1, "memory"}, 978 {PCIC_MEMORY, PCIS_MEMORY_RAM, "RAM"}, 979 {PCIC_MEMORY, PCIS_MEMORY_FLASH, "flash"}, 980 {PCIC_BRIDGE, -1, "bridge"}, 981 {PCIC_BRIDGE, PCIS_BRIDGE_HOST, "HOST-PCI"}, 982 {PCIC_BRIDGE, PCIS_BRIDGE_ISA, "PCI-ISA"}, 983 {PCIC_BRIDGE, PCIS_BRIDGE_EISA, "PCI-EISA"}, 984 {PCIC_BRIDGE, PCIS_BRIDGE_MCA, "PCI-MCA"}, 985 {PCIC_BRIDGE, PCIS_BRIDGE_PCI, "PCI-PCI"}, 986 {PCIC_BRIDGE, PCIS_BRIDGE_PCMCIA, "PCI-PCMCIA"}, 987 {PCIC_BRIDGE, PCIS_BRIDGE_NUBUS, "PCI-NuBus"}, 988 {PCIC_BRIDGE, PCIS_BRIDGE_CARDBUS, "PCI-CardBus"}, 989 {PCIC_BRIDGE, PCIS_BRIDGE_OTHER, "PCI-unknown"}, 990 {PCIC_SIMPLECOMM, -1, "simple comms"}, 991 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_UART, "UART"}, /* could detect 16550 */ 992 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_PAR, "parallel port"}, 993 {PCIC_BASEPERIPH, -1, "base peripheral"}, 994 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PIC, "interrupt controller"}, 995 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_DMA, "DMA controller"}, 996 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_TIMER, "timer"}, 997 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_RTC, "realtime clock"}, 998 {PCIC_INPUTDEV, -1, "input device"}, 999 {PCIC_INPUTDEV, PCIS_INPUTDEV_KEYBOARD, "keyboard"}, 1000 {PCIC_INPUTDEV, PCIS_INPUTDEV_DIGITIZER,"digitizer"}, 1001 {PCIC_INPUTDEV, PCIS_INPUTDEV_MOUSE, "mouse"}, 1002 {PCIC_DOCKING, -1, "docking station"}, 1003 {PCIC_PROCESSOR, -1, "processor"}, 1004 {PCIC_SERIALBUS, -1, "serial bus"}, 1005 {PCIC_SERIALBUS, PCIS_SERIALBUS_FW, "FireWire"}, 1006 {PCIC_SERIALBUS, PCIS_SERIALBUS_ACCESS, "AccessBus"}, 1007 {PCIC_SERIALBUS, PCIS_SERIALBUS_SSA, "SSA"}, 1008 {PCIC_SERIALBUS, PCIS_SERIALBUS_USB, "USB"}, 1009 {PCIC_SERIALBUS, PCIS_SERIALBUS_FC, "Fibre Channel"}, 1010 {PCIC_SERIALBUS, PCIS_SERIALBUS_SMBUS, "SMBus"}, 1011 {0, 0, NULL} 1012 }; 1013 1014 void 1015 pci_probe_nomatch(device_t dev, device_t child) 1016 { 1017 int i; 1018 char *cp, *scp, *device; 1019 1020 /* 1021 * Look for a listing for this device in a loaded device database. 1022 */ 1023 if ((device = pci_describe_device(child)) != NULL) { 1024 device_printf(dev, "<%s>", device); 1025 free(device, M_DEVBUF); 1026 } else { 1027 /* 1028 * Scan the class/subclass descriptions for a general 1029 * description. 1030 */ 1031 cp = "unknown"; 1032 scp = NULL; 1033 for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) { 1034 if (pci_nomatch_tab[i].class == pci_get_class(child)) { 1035 if (pci_nomatch_tab[i].subclass == -1) { 1036 cp = pci_nomatch_tab[i].desc; 1037 } else if (pci_nomatch_tab[i].subclass == 1038 pci_get_subclass(child)) { 1039 scp = pci_nomatch_tab[i].desc; 1040 } 1041 } 1042 } 1043 device_printf(dev, "<%s%s%s>", 1044 cp ? cp : "", 1045 ((cp != NULL) && (scp != NULL)) ? ", " : "", 1046 scp ? scp : ""); 1047 } 1048 printf(" at device %d.%d (no driver attached)\n", 1049 pci_get_slot(child), pci_get_function(child)); 1050 return; 1051 } 1052 1053 /* 1054 * Parse the PCI device database, if loaded, and return a pointer to a 1055 * description of the device. 1056 * 1057 * The database is flat text formatted as follows: 1058 * 1059 * Any line not in a valid format is ignored. 1060 * Lines are terminated with newline '\n' characters. 1061 * 1062 * A VENDOR line consists of the 4 digit (hex) vendor code, a TAB, then 1063 * the vendor name. 1064 * 1065 * A DEVICE line is entered immediately below the corresponding VENDOR ID. 1066 * - devices cannot be listed without a corresponding VENDOR line. 1067 * A DEVICE line consists of a TAB, the 4 digit (hex) device code, 1068 * another TAB, then the device name. 1069 */ 1070 1071 /* 1072 * Assuming (ptr) points to the beginning of a line in the database, 1073 * return the vendor or device and description of the next entry. 1074 * The value of (vendor) or (device) inappropriate for the entry type 1075 * is set to -1. Returns nonzero at the end of the database. 1076 * 1077 * Note that this is slightly unrobust in the face of corrupt data; 1078 * we attempt to safeguard against this by spamming the end of the 1079 * database with a newline when we initialise. 1080 */ 1081 static int 1082 pci_describe_parse_line(char **ptr, int *vendor, int *device, char **desc) 1083 { 1084 char *cp = *ptr; 1085 int left; 1086 1087 *device = -1; 1088 *vendor = -1; 1089 **desc = '\0'; 1090 for (;;) { 1091 left = pci_vendordata_size - (cp - pci_vendordata); 1092 if (left <= 0) { 1093 *ptr = cp; 1094 return(1); 1095 } 1096 1097 /* vendor entry? */ 1098 if (*cp != '\t' && 1099 sscanf(cp, "%x\t%80[^\n]", vendor, *desc) == 2) 1100 break; 1101 /* device entry? */ 1102 if (*cp == '\t' && 1103 sscanf(cp, "%x\t%80[^\n]", device, *desc) == 2) 1104 break; 1105 1106 /* skip to next line */ 1107 while (*cp != '\n' && left > 0) { 1108 cp++; 1109 left--; 1110 } 1111 if (*cp == '\n') { 1112 cp++; 1113 left--; 1114 } 1115 } 1116 /* skip to next line */ 1117 while (*cp != '\n' && left > 0) { 1118 cp++; 1119 left--; 1120 } 1121 if (*cp == '\n' && left > 0) 1122 cp++; 1123 *ptr = cp; 1124 return(0); 1125 } 1126 1127 static char * 1128 pci_describe_device(device_t dev) 1129 { 1130 int vendor, device; 1131 char *desc, *vp, *dp, *line; 1132 1133 desc = vp = dp = NULL; 1134 1135 /* 1136 * If we have no vendor data, we can't do anything. 1137 */ 1138 if (pci_vendordata == NULL) 1139 goto out; 1140 1141 /* 1142 * Scan the vendor data looking for this device 1143 */ 1144 line = pci_vendordata; 1145 if ((vp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL) 1146 goto out; 1147 for (;;) { 1148 if (pci_describe_parse_line(&line, &vendor, &device, &vp)) 1149 goto out; 1150 if (vendor == pci_get_vendor(dev)) 1151 break; 1152 } 1153 if ((dp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL) 1154 goto out; 1155 for (;;) { 1156 if (pci_describe_parse_line(&line, &vendor, &device, &dp)) { 1157 *dp = 0; 1158 break; 1159 } 1160 if (vendor != -1) { 1161 *dp = 0; 1162 break; 1163 } 1164 if (device == pci_get_device(dev)) 1165 break; 1166 } 1167 if (dp[0] == '\0') 1168 snprintf(dp, 80, "0x%x", pci_get_device(dev)); 1169 if ((desc = malloc(strlen(vp) + strlen(dp) + 3, M_DEVBUF, M_NOWAIT)) != 1170 NULL) 1171 sprintf(desc, "%s, %s", vp, dp); 1172 out: 1173 if (vp != NULL) 1174 free(vp, M_DEVBUF); 1175 if (dp != NULL) 1176 free(dp, M_DEVBUF); 1177 return(desc); 1178 } 1179 1180 int 1181 pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 1182 { 1183 struct pci_devinfo *dinfo; 1184 pcicfgregs *cfg; 1185 1186 dinfo = device_get_ivars(child); 1187 cfg = &dinfo->cfg; 1188 1189 switch (which) { 1190 case PCI_IVAR_ETHADDR: 1191 /* 1192 * The generic accessor doesn't deal with failure, so 1193 * we set the return value, then return an error. 1194 */ 1195 *((uint8_t **) result) = NULL; 1196 return (EINVAL); 1197 case PCI_IVAR_SUBVENDOR: 1198 *result = cfg->subvendor; 1199 break; 1200 case PCI_IVAR_SUBDEVICE: 1201 *result = cfg->subdevice; 1202 break; 1203 case PCI_IVAR_VENDOR: 1204 *result = cfg->vendor; 1205 break; 1206 case PCI_IVAR_DEVICE: 1207 *result = cfg->device; 1208 break; 1209 case PCI_IVAR_DEVID: 1210 *result = (cfg->device << 16) | cfg->vendor; 1211 break; 1212 case PCI_IVAR_CLASS: 1213 *result = cfg->baseclass; 1214 break; 1215 case PCI_IVAR_SUBCLASS: 1216 *result = cfg->subclass; 1217 break; 1218 case PCI_IVAR_PROGIF: 1219 *result = cfg->progif; 1220 break; 1221 case PCI_IVAR_REVID: 1222 *result = cfg->revid; 1223 break; 1224 case PCI_IVAR_INTPIN: 1225 *result = cfg->intpin; 1226 break; 1227 case PCI_IVAR_IRQ: 1228 *result = cfg->intline; 1229 break; 1230 case PCI_IVAR_BUS: 1231 *result = cfg->bus; 1232 break; 1233 case PCI_IVAR_SLOT: 1234 *result = cfg->slot; 1235 break; 1236 case PCI_IVAR_FUNCTION: 1237 *result = cfg->func; 1238 break; 1239 default: 1240 return (ENOENT); 1241 } 1242 return (0); 1243 } 1244 1245 int 1246 pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 1247 { 1248 struct pci_devinfo *dinfo; 1249 1250 dinfo = device_get_ivars(child); 1251 1252 switch (which) { 1253 case PCI_IVAR_INTPIN: 1254 dinfo->cfg.intpin = value; 1255 return (0); 1256 case PCI_IVAR_ETHADDR: 1257 case PCI_IVAR_SUBVENDOR: 1258 case PCI_IVAR_SUBDEVICE: 1259 case PCI_IVAR_VENDOR: 1260 case PCI_IVAR_DEVICE: 1261 case PCI_IVAR_DEVID: 1262 case PCI_IVAR_CLASS: 1263 case PCI_IVAR_SUBCLASS: 1264 case PCI_IVAR_PROGIF: 1265 case PCI_IVAR_REVID: 1266 case PCI_IVAR_IRQ: 1267 case PCI_IVAR_BUS: 1268 case PCI_IVAR_SLOT: 1269 case PCI_IVAR_FUNCTION: 1270 return (EINVAL); /* disallow for now */ 1271 1272 default: 1273 return (ENOENT); 1274 } 1275 } 1276 1277 1278 #include "opt_ddb.h" 1279 #ifdef DDB 1280 #include <ddb/ddb.h> 1281 #include <sys/cons.h> 1282 1283 /* 1284 * List resources based on pci map registers, used for within ddb 1285 */ 1286 1287 DB_SHOW_COMMAND(pciregs, db_pci_dump) 1288 { 1289 struct pci_devinfo *dinfo; 1290 struct devlist *devlist_head; 1291 struct pci_conf *p; 1292 const char *name; 1293 int i, error, none_count, quit; 1294 1295 none_count = 0; 1296 /* get the head of the device queue */ 1297 devlist_head = &pci_devq; 1298 1299 /* 1300 * Go through the list of devices and print out devices 1301 */ 1302 db_setup_paging(db_simple_pager, &quit, DB_LINES_PER_PAGE); 1303 for (error = 0, i = 0, quit = 0, 1304 dinfo = STAILQ_FIRST(devlist_head); 1305 (dinfo != NULL) && (error == 0) && (i < pci_numdevs) && !quit; 1306 dinfo = STAILQ_NEXT(dinfo, pci_links), i++) { 1307 1308 /* Populate pd_name and pd_unit */ 1309 name = NULL; 1310 if (dinfo->cfg.dev) 1311 name = device_get_name(dinfo->cfg.dev); 1312 1313 p = &dinfo->conf; 1314 db_printf("%s%d@pci%d:%d:%d:\tclass=0x%06x card=0x%08x " 1315 "chip=0x%08x rev=0x%02x hdr=0x%02x\n", 1316 (name && *name) ? name : "none", 1317 (name && *name) ? (int)device_get_unit(dinfo->cfg.dev) : 1318 none_count++, 1319 p->pc_sel.pc_bus, p->pc_sel.pc_dev, 1320 p->pc_sel.pc_func, (p->pc_class << 16) | 1321 (p->pc_subclass << 8) | p->pc_progif, 1322 (p->pc_subdevice << 16) | p->pc_subvendor, 1323 (p->pc_device << 16) | p->pc_vendor, 1324 p->pc_revid, p->pc_hdr); 1325 } 1326 } 1327 #endif /* DDB */ 1328 1329 struct resource * 1330 pci_alloc_resource(device_t dev, device_t child, int type, int *rid, 1331 u_long start, u_long end, u_long count, u_int flags) 1332 { 1333 struct pci_devinfo *dinfo = device_get_ivars(child); 1334 struct resource_list *rl = &dinfo->resources; 1335 pcicfgregs *cfg = &dinfo->cfg; 1336 1337 /* 1338 * Perform lazy resource allocation 1339 * 1340 * XXX add support here for SYS_RES_IOPORT and SYS_RES_MEMORY 1341 */ 1342 if (device_get_parent(child) == dev) { 1343 switch (type) { 1344 case SYS_RES_IRQ: 1345 /* 1346 * If the child device doesn't have an 1347 * interrupt routed and is deserving of an 1348 * interrupt, try to assign it one. 1349 */ 1350 if (!PCI_INTERRUPT_VALID(cfg->intline) && 1351 (cfg->intpin != 0)) { 1352 cfg->intline = PCI_ASSIGN_INTERRUPT(dev, child); 1353 if (PCI_INTERRUPT_VALID(cfg->intline)) { 1354 pci_write_config(child, PCIR_INTLINE, 1355 cfg->intline, 1); 1356 resource_list_add(rl, SYS_RES_IRQ, 0, 1357 cfg->intline, cfg->intline, 1); 1358 } 1359 } 1360 break; 1361 case SYS_RES_IOPORT: 1362 case SYS_RES_MEMORY: 1363 if (*rid < PCIR_BAR(cfg->nummaps)) { 1364 /* 1365 * Enable the I/O mode. We should 1366 * also be allocating resources 1367 * too. XXX 1368 */ 1369 if (PCI_ENABLE_IO(dev, child, type)) 1370 return (NULL); 1371 } 1372 break; 1373 } 1374 } 1375 1376 return (resource_list_alloc(rl, dev, child, type, rid, 1377 start, end, count, flags)); 1378 } 1379 1380 void 1381 pci_delete_resource(device_t dev, device_t child, int type, int rid) 1382 { 1383 struct pci_devinfo *dinfo; 1384 struct resource_list *rl; 1385 struct resource_list_entry *rle; 1386 1387 if (device_get_parent(child) != dev) 1388 return; 1389 1390 dinfo = device_get_ivars(child); 1391 rl = &dinfo->resources; 1392 rle = resource_list_find(rl, type, rid); 1393 if (rle) { 1394 if (rle->res) { 1395 if (rman_get_device(rle->res) != dev || 1396 rman_get_flags(rle->res) & RF_ACTIVE) { 1397 device_printf(dev, "delete_resource: " 1398 "Resource still owned by child, oops. " 1399 "(type=%d, rid=%d, addr=%lx)\n", 1400 rle->type, rle->rid, 1401 rman_get_start(rle->res)); 1402 return; 1403 } 1404 bus_release_resource(dev, type, rid, rle->res); 1405 } 1406 resource_list_delete(rl, type, rid); 1407 } 1408 /* 1409 * Why do we turn off the PCI configuration BAR when we delete a 1410 * resource? -- imp 1411 */ 1412 pci_write_config(child, rid, 0, 4); 1413 BUS_DELETE_RESOURCE(device_get_parent(dev), child, type, rid); 1414 } 1415 1416 struct resource_list * 1417 pci_get_resource_list (device_t dev, device_t child) 1418 { 1419 struct pci_devinfo * dinfo = device_get_ivars(child); 1420 struct resource_list * rl = &dinfo->resources; 1421 1422 if (!rl) 1423 return (NULL); 1424 1425 return (rl); 1426 } 1427 1428 uint32_t 1429 pci_read_config_method(device_t dev, device_t child, int reg, int width) 1430 { 1431 struct pci_devinfo *dinfo = device_get_ivars(child); 1432 pcicfgregs *cfg = &dinfo->cfg; 1433 1434 return (PCIB_READ_CONFIG(device_get_parent(dev), 1435 cfg->bus, cfg->slot, cfg->func, reg, width)); 1436 } 1437 1438 void 1439 pci_write_config_method(device_t dev, device_t child, int reg, 1440 uint32_t val, int width) 1441 { 1442 struct pci_devinfo *dinfo = device_get_ivars(child); 1443 pcicfgregs *cfg = &dinfo->cfg; 1444 1445 PCIB_WRITE_CONFIG(device_get_parent(dev), 1446 cfg->bus, cfg->slot, cfg->func, reg, val, width); 1447 } 1448 1449 int 1450 pci_child_location_str_method(device_t cbdev, device_t child, char *buf, 1451 size_t buflen) 1452 { 1453 struct pci_devinfo *dinfo; 1454 1455 dinfo = device_get_ivars(child); 1456 snprintf(buf, buflen, "slot=%d function=%d", pci_get_slot(child), 1457 pci_get_function(child)); 1458 return (0); 1459 } 1460 1461 int 1462 pci_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 1463 size_t buflen) 1464 { 1465 struct pci_devinfo *dinfo; 1466 pcicfgregs *cfg; 1467 1468 dinfo = device_get_ivars(child); 1469 cfg = &dinfo->cfg; 1470 snprintf(buf, buflen, "vendor=0x%04x device=0x%04x subvendor=0x%04x " 1471 "subdevice=0x%04x class=0x%02x%02x%02x", cfg->vendor, cfg->device, 1472 cfg->subvendor, cfg->subdevice, cfg->baseclass, cfg->subclass, 1473 cfg->progif); 1474 return (0); 1475 } 1476 1477 int 1478 pci_assign_interrupt_method(device_t dev, device_t child) 1479 { 1480 struct pci_devinfo *dinfo = device_get_ivars(child); 1481 pcicfgregs *cfg = &dinfo->cfg; 1482 1483 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child, 1484 cfg->intpin)); 1485 } 1486 1487 static int 1488 pci_modevent(module_t mod, int what, void *arg) 1489 { 1490 static dev_t pci_cdev; 1491 1492 switch (what) { 1493 case MOD_LOAD: 1494 STAILQ_INIT(&pci_devq); 1495 pci_generation = 0; 1496 pci_cdev = make_dev(&pcicdev, 0, UID_ROOT, GID_WHEEL, 0644, 1497 "pci"); 1498 pci_load_vendor_data(); 1499 break; 1500 1501 case MOD_UNLOAD: 1502 destroy_dev(pci_cdev); 1503 break; 1504 } 1505 1506 return (0); 1507 } 1508 1509 int 1510 pci_resume(device_t dev) 1511 { 1512 int numdevs; 1513 int i; 1514 device_t *children; 1515 device_t child; 1516 struct pci_devinfo *dinfo; 1517 pcicfgregs *cfg; 1518 1519 device_get_children(dev, &children, &numdevs); 1520 1521 for (i = 0; i < numdevs; i++) { 1522 child = children[i]; 1523 1524 dinfo = device_get_ivars(child); 1525 cfg = &dinfo->cfg; 1526 if (cfg->intpin > 0 && PCI_INTERRUPT_VALID(cfg->intline)) { 1527 cfg->intline = PCI_ASSIGN_INTERRUPT(dev, child); 1528 if (PCI_INTERRUPT_VALID(cfg->intline)) { 1529 pci_write_config(child, PCIR_INTLINE, 1530 cfg->intline, 1); 1531 } 1532 } 1533 } 1534 1535 free(children, M_TEMP); 1536 1537 return (bus_generic_resume(dev)); 1538 } 1539
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