pci.c revision 209154
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 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: head/sys/dev/pci/pci.c 209154 2010-06-14 07:10:37Z mav $"); 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/endian.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#include <machine/stdarg.h> 55 56#if defined(__i386__) || defined(__amd64__) || defined(__powerpc__) 57#include <machine/intr_machdep.h> 58#endif 59 60#include <sys/pciio.h> 61#include <dev/pci/pcireg.h> 62#include <dev/pci/pcivar.h> 63#include <dev/pci/pci_private.h> 64 65#include <dev/usb/controller/ehcireg.h> 66#include <dev/usb/controller/ohcireg.h> 67#include <dev/usb/controller/uhcireg.h> 68 69#include "pcib_if.h" 70#include "pci_if.h" 71 72#ifdef __HAVE_ACPI 73#include <contrib/dev/acpica/include/acpi.h> 74#include "acpi_if.h" 75#else 76#define ACPI_PWR_FOR_SLEEP(x, y, z) 77#endif 78 79static pci_addr_t pci_mapbase(uint64_t mapreg); 80static const char *pci_maptype(uint64_t mapreg); 81static int pci_mapsize(uint64_t testval); 82static int pci_maprange(uint64_t mapreg); 83static pci_addr_t pci_rombase(uint64_t mapreg); 84static int pci_romsize(uint64_t testval); 85static void pci_fixancient(pcicfgregs *cfg); 86static int pci_printf(pcicfgregs *cfg, const char *fmt, ...); 87 88static int pci_porten(device_t dev); 89static int pci_memen(device_t dev); 90static void pci_assign_interrupt(device_t bus, device_t dev, 91 int force_route); 92static int pci_add_map(device_t bus, device_t dev, int reg, 93 struct resource_list *rl, int force, int prefetch); 94static int pci_probe(device_t dev); 95static int pci_attach(device_t dev); 96static void pci_load_vendor_data(void); 97static int pci_describe_parse_line(char **ptr, int *vendor, 98 int *device, char **desc); 99static char *pci_describe_device(device_t dev); 100static int pci_modevent(module_t mod, int what, void *arg); 101static void pci_hdrtypedata(device_t pcib, int b, int s, int f, 102 pcicfgregs *cfg); 103static void pci_read_extcap(device_t pcib, pcicfgregs *cfg); 104static int pci_read_vpd_reg(device_t pcib, pcicfgregs *cfg, 105 int reg, uint32_t *data); 106#if 0 107static int pci_write_vpd_reg(device_t pcib, pcicfgregs *cfg, 108 int reg, uint32_t data); 109#endif 110static void pci_read_vpd(device_t pcib, pcicfgregs *cfg); 111static void pci_disable_msi(device_t dev); 112static void pci_enable_msi(device_t dev, uint64_t address, 113 uint16_t data); 114static void pci_enable_msix(device_t dev, u_int index, 115 uint64_t address, uint32_t data); 116static void pci_mask_msix(device_t dev, u_int index); 117static void pci_unmask_msix(device_t dev, u_int index); 118static int pci_msi_blacklisted(void); 119static void pci_resume_msi(device_t dev); 120static void pci_resume_msix(device_t dev); 121static int pci_remap_intr_method(device_t bus, device_t dev, 122 u_int irq); 123 124static device_method_t pci_methods[] = { 125 /* Device interface */ 126 DEVMETHOD(device_probe, pci_probe), 127 DEVMETHOD(device_attach, pci_attach), 128 DEVMETHOD(device_detach, bus_generic_detach), 129 DEVMETHOD(device_shutdown, bus_generic_shutdown), 130 DEVMETHOD(device_suspend, pci_suspend), 131 DEVMETHOD(device_resume, pci_resume), 132 133 /* Bus interface */ 134 DEVMETHOD(bus_print_child, pci_print_child), 135 DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch), 136 DEVMETHOD(bus_read_ivar, pci_read_ivar), 137 DEVMETHOD(bus_write_ivar, pci_write_ivar), 138 DEVMETHOD(bus_driver_added, pci_driver_added), 139 DEVMETHOD(bus_setup_intr, pci_setup_intr), 140 DEVMETHOD(bus_teardown_intr, pci_teardown_intr), 141 142 DEVMETHOD(bus_get_resource_list,pci_get_resource_list), 143 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 144 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 145 DEVMETHOD(bus_delete_resource, pci_delete_resource), 146 DEVMETHOD(bus_alloc_resource, pci_alloc_resource), 147 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 148 DEVMETHOD(bus_activate_resource, pci_activate_resource), 149 DEVMETHOD(bus_deactivate_resource, pci_deactivate_resource), 150 DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method), 151 DEVMETHOD(bus_child_location_str, pci_child_location_str_method), 152 DEVMETHOD(bus_remap_intr, pci_remap_intr_method), 153 154 /* PCI interface */ 155 DEVMETHOD(pci_read_config, pci_read_config_method), 156 DEVMETHOD(pci_write_config, pci_write_config_method), 157 DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method), 158 DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method), 159 DEVMETHOD(pci_enable_io, pci_enable_io_method), 160 DEVMETHOD(pci_disable_io, pci_disable_io_method), 161 DEVMETHOD(pci_get_vpd_ident, pci_get_vpd_ident_method), 162 DEVMETHOD(pci_get_vpd_readonly, pci_get_vpd_readonly_method), 163 DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method), 164 DEVMETHOD(pci_set_powerstate, pci_set_powerstate_method), 165 DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_method), 166 DEVMETHOD(pci_find_extcap, pci_find_extcap_method), 167 DEVMETHOD(pci_alloc_msi, pci_alloc_msi_method), 168 DEVMETHOD(pci_alloc_msix, pci_alloc_msix_method), 169 DEVMETHOD(pci_remap_msix, pci_remap_msix_method), 170 DEVMETHOD(pci_release_msi, pci_release_msi_method), 171 DEVMETHOD(pci_msi_count, pci_msi_count_method), 172 DEVMETHOD(pci_msix_count, pci_msix_count_method), 173 174 { 0, 0 } 175}; 176 177DEFINE_CLASS_0(pci, pci_driver, pci_methods, 0); 178 179static devclass_t pci_devclass; 180DRIVER_MODULE(pci, pcib, pci_driver, pci_devclass, pci_modevent, 0); 181MODULE_VERSION(pci, 1); 182 183static char *pci_vendordata; 184static size_t pci_vendordata_size; 185 186 187struct pci_quirk { 188 uint32_t devid; /* Vendor/device of the card */ 189 int type; 190#define PCI_QUIRK_MAP_REG 1 /* PCI map register in weird place */ 191#define PCI_QUIRK_DISABLE_MSI 2 /* MSI/MSI-X doesn't work */ 192 int arg1; 193 int arg2; 194}; 195 196struct pci_quirk pci_quirks[] = { 197 /* The Intel 82371AB and 82443MX has a map register at offset 0x90. */ 198 { 0x71138086, PCI_QUIRK_MAP_REG, 0x90, 0 }, 199 { 0x719b8086, PCI_QUIRK_MAP_REG, 0x90, 0 }, 200 /* As does the Serverworks OSB4 (the SMBus mapping register) */ 201 { 0x02001166, PCI_QUIRK_MAP_REG, 0x90, 0 }, 202 203 /* 204 * MSI doesn't work with the ServerWorks CNB20-HE Host Bridge 205 * or the CMIC-SL (AKA ServerWorks GC_LE). 206 */ 207 { 0x00141166, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 208 { 0x00171166, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 209 210 /* 211 * MSI doesn't work on earlier Intel chipsets including 212 * E7500, E7501, E7505, 845, 865, 875/E7210, and 855. 213 */ 214 { 0x25408086, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 215 { 0x254c8086, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 216 { 0x25508086, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 217 { 0x25608086, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 218 { 0x25708086, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 219 { 0x25788086, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 220 { 0x35808086, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 221 222 /* 223 * MSI doesn't work with devices behind the AMD 8131 HT-PCIX 224 * bridge. 225 */ 226 { 0x74501022, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 227 228 { 0 } 229}; 230 231/* map register information */ 232#define PCI_MAPMEM 0x01 /* memory map */ 233#define PCI_MAPMEMP 0x02 /* prefetchable memory map */ 234#define PCI_MAPPORT 0x04 /* port map */ 235 236struct devlist pci_devq; 237uint32_t pci_generation; 238uint32_t pci_numdevs = 0; 239static int pcie_chipset, pcix_chipset; 240 241/* sysctl vars */ 242SYSCTL_NODE(_hw, OID_AUTO, pci, CTLFLAG_RD, 0, "PCI bus tuning parameters"); 243 244static int pci_enable_io_modes = 1; 245TUNABLE_INT("hw.pci.enable_io_modes", &pci_enable_io_modes); 246SYSCTL_INT(_hw_pci, OID_AUTO, enable_io_modes, CTLFLAG_RW, 247 &pci_enable_io_modes, 1, 248 "Enable I/O and memory bits in the config register. Some BIOSes do not\n\ 249enable these bits correctly. We'd like to do this all the time, but there\n\ 250are some peripherals that this causes problems with."); 251 252static int pci_do_power_nodriver = 0; 253TUNABLE_INT("hw.pci.do_power_nodriver", &pci_do_power_nodriver); 254SYSCTL_INT(_hw_pci, OID_AUTO, do_power_nodriver, CTLFLAG_RW, 255 &pci_do_power_nodriver, 0, 256 "Place a function into D3 state when no driver attaches to it. 0 means\n\ 257disable. 1 means conservatively place devices into D3 state. 2 means\n\ 258agressively place devices into D3 state. 3 means put absolutely everything\n\ 259in D3 state."); 260 261int pci_do_power_resume = 1; 262TUNABLE_INT("hw.pci.do_power_resume", &pci_do_power_resume); 263SYSCTL_INT(_hw_pci, OID_AUTO, do_power_resume, CTLFLAG_RW, 264 &pci_do_power_resume, 1, 265 "Transition from D3 -> D0 on resume."); 266 267static int pci_do_msi = 1; 268TUNABLE_INT("hw.pci.enable_msi", &pci_do_msi); 269SYSCTL_INT(_hw_pci, OID_AUTO, enable_msi, CTLFLAG_RW, &pci_do_msi, 1, 270 "Enable support for MSI interrupts"); 271 272static int pci_do_msix = 1; 273TUNABLE_INT("hw.pci.enable_msix", &pci_do_msix); 274SYSCTL_INT(_hw_pci, OID_AUTO, enable_msix, CTLFLAG_RW, &pci_do_msix, 1, 275 "Enable support for MSI-X interrupts"); 276 277static int pci_honor_msi_blacklist = 1; 278TUNABLE_INT("hw.pci.honor_msi_blacklist", &pci_honor_msi_blacklist); 279SYSCTL_INT(_hw_pci, OID_AUTO, honor_msi_blacklist, CTLFLAG_RD, 280 &pci_honor_msi_blacklist, 1, "Honor chipset blacklist for MSI"); 281 282#if defined(__i386__) || defined(__amd64__) 283static int pci_usb_takeover = 1; 284#else 285static int pci_usb_takeover = 0; 286#endif 287TUNABLE_INT("hw.pci.usb_early_takeover", &pci_usb_takeover); 288SYSCTL_INT(_hw_pci, OID_AUTO, usb_early_takeover, CTLFLAG_RD | CTLFLAG_TUN, 289 &pci_usb_takeover, 1, "Enable early takeover of USB controllers.\n\ 290Disable this if you depend on BIOS emulation of USB devices, that is\n\ 291you use USB devices (like keyboard or mouse) but do not load USB drivers"); 292 293/* Find a device_t by bus/slot/function in domain 0 */ 294 295device_t 296pci_find_bsf(uint8_t bus, uint8_t slot, uint8_t func) 297{ 298 299 return (pci_find_dbsf(0, bus, slot, func)); 300} 301 302/* Find a device_t by domain/bus/slot/function */ 303 304device_t 305pci_find_dbsf(uint32_t domain, uint8_t bus, uint8_t slot, uint8_t func) 306{ 307 struct pci_devinfo *dinfo; 308 309 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) { 310 if ((dinfo->cfg.domain == domain) && 311 (dinfo->cfg.bus == bus) && 312 (dinfo->cfg.slot == slot) && 313 (dinfo->cfg.func == func)) { 314 return (dinfo->cfg.dev); 315 } 316 } 317 318 return (NULL); 319} 320 321/* Find a device_t by vendor/device ID */ 322 323device_t 324pci_find_device(uint16_t vendor, uint16_t device) 325{ 326 struct pci_devinfo *dinfo; 327 328 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) { 329 if ((dinfo->cfg.vendor == vendor) && 330 (dinfo->cfg.device == device)) { 331 return (dinfo->cfg.dev); 332 } 333 } 334 335 return (NULL); 336} 337 338static int 339pci_printf(pcicfgregs *cfg, const char *fmt, ...) 340{ 341 va_list ap; 342 int retval; 343 344 retval = printf("pci%d:%d:%d:%d: ", cfg->domain, cfg->bus, cfg->slot, 345 cfg->func); 346 va_start(ap, fmt); 347 retval += vprintf(fmt, ap); 348 va_end(ap); 349 return (retval); 350} 351 352/* return base address of memory or port map */ 353 354static pci_addr_t 355pci_mapbase(uint64_t mapreg) 356{ 357 358 if (PCI_BAR_MEM(mapreg)) 359 return (mapreg & PCIM_BAR_MEM_BASE); 360 else 361 return (mapreg & PCIM_BAR_IO_BASE); 362} 363 364/* return map type of memory or port map */ 365 366static const char * 367pci_maptype(uint64_t mapreg) 368{ 369 370 if (PCI_BAR_IO(mapreg)) 371 return ("I/O Port"); 372 if (mapreg & PCIM_BAR_MEM_PREFETCH) 373 return ("Prefetchable Memory"); 374 return ("Memory"); 375} 376 377/* return log2 of map size decoded for memory or port map */ 378 379static int 380pci_mapsize(uint64_t testval) 381{ 382 int ln2size; 383 384 testval = pci_mapbase(testval); 385 ln2size = 0; 386 if (testval != 0) { 387 while ((testval & 1) == 0) 388 { 389 ln2size++; 390 testval >>= 1; 391 } 392 } 393 return (ln2size); 394} 395 396/* return base address of device ROM */ 397 398static pci_addr_t 399pci_rombase(uint64_t mapreg) 400{ 401 402 return (mapreg & PCIM_BIOS_ADDR_MASK); 403} 404 405/* return log2 of map size decided for device ROM */ 406 407static int 408pci_romsize(uint64_t testval) 409{ 410 int ln2size; 411 412 testval = pci_rombase(testval); 413 ln2size = 0; 414 if (testval != 0) { 415 while ((testval & 1) == 0) 416 { 417 ln2size++; 418 testval >>= 1; 419 } 420 } 421 return (ln2size); 422} 423 424/* return log2 of address range supported by map register */ 425 426static int 427pci_maprange(uint64_t mapreg) 428{ 429 int ln2range = 0; 430 431 if (PCI_BAR_IO(mapreg)) 432 ln2range = 32; 433 else 434 switch (mapreg & PCIM_BAR_MEM_TYPE) { 435 case PCIM_BAR_MEM_32: 436 ln2range = 32; 437 break; 438 case PCIM_BAR_MEM_1MB: 439 ln2range = 20; 440 break; 441 case PCIM_BAR_MEM_64: 442 ln2range = 64; 443 break; 444 } 445 return (ln2range); 446} 447 448/* adjust some values from PCI 1.0 devices to match 2.0 standards ... */ 449 450static void 451pci_fixancient(pcicfgregs *cfg) 452{ 453 if (cfg->hdrtype != 0) 454 return; 455 456 /* PCI to PCI bridges use header type 1 */ 457 if (cfg->baseclass == PCIC_BRIDGE && cfg->subclass == PCIS_BRIDGE_PCI) 458 cfg->hdrtype = 1; 459} 460 461/* extract header type specific config data */ 462 463static void 464pci_hdrtypedata(device_t pcib, int b, int s, int f, pcicfgregs *cfg) 465{ 466#define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w) 467 switch (cfg->hdrtype) { 468 case 0: 469 cfg->subvendor = REG(PCIR_SUBVEND_0, 2); 470 cfg->subdevice = REG(PCIR_SUBDEV_0, 2); 471 cfg->nummaps = PCI_MAXMAPS_0; 472 break; 473 case 1: 474 cfg->nummaps = PCI_MAXMAPS_1; 475 break; 476 case 2: 477 cfg->subvendor = REG(PCIR_SUBVEND_2, 2); 478 cfg->subdevice = REG(PCIR_SUBDEV_2, 2); 479 cfg->nummaps = PCI_MAXMAPS_2; 480 break; 481 } 482#undef REG 483} 484 485/* read configuration header into pcicfgregs structure */ 486struct pci_devinfo * 487pci_read_device(device_t pcib, int d, int b, int s, int f, size_t size) 488{ 489#define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w) 490 pcicfgregs *cfg = NULL; 491 struct pci_devinfo *devlist_entry; 492 struct devlist *devlist_head; 493 494 devlist_head = &pci_devq; 495 496 devlist_entry = NULL; 497 498 if (REG(PCIR_DEVVENDOR, 4) != 0xfffffffful) { 499 devlist_entry = malloc(size, M_DEVBUF, M_WAITOK | M_ZERO); 500 if (devlist_entry == NULL) 501 return (NULL); 502 503 cfg = &devlist_entry->cfg; 504 505 cfg->domain = d; 506 cfg->bus = b; 507 cfg->slot = s; 508 cfg->func = f; 509 cfg->vendor = REG(PCIR_VENDOR, 2); 510 cfg->device = REG(PCIR_DEVICE, 2); 511 cfg->cmdreg = REG(PCIR_COMMAND, 2); 512 cfg->statreg = REG(PCIR_STATUS, 2); 513 cfg->baseclass = REG(PCIR_CLASS, 1); 514 cfg->subclass = REG(PCIR_SUBCLASS, 1); 515 cfg->progif = REG(PCIR_PROGIF, 1); 516 cfg->revid = REG(PCIR_REVID, 1); 517 cfg->hdrtype = REG(PCIR_HDRTYPE, 1); 518 cfg->cachelnsz = REG(PCIR_CACHELNSZ, 1); 519 cfg->lattimer = REG(PCIR_LATTIMER, 1); 520 cfg->intpin = REG(PCIR_INTPIN, 1); 521 cfg->intline = REG(PCIR_INTLINE, 1); 522 523 cfg->mingnt = REG(PCIR_MINGNT, 1); 524 cfg->maxlat = REG(PCIR_MAXLAT, 1); 525 526 cfg->mfdev = (cfg->hdrtype & PCIM_MFDEV) != 0; 527 cfg->hdrtype &= ~PCIM_MFDEV; 528 529 pci_fixancient(cfg); 530 pci_hdrtypedata(pcib, b, s, f, cfg); 531 532 if (REG(PCIR_STATUS, 2) & PCIM_STATUS_CAPPRESENT) 533 pci_read_extcap(pcib, cfg); 534 535 STAILQ_INSERT_TAIL(devlist_head, devlist_entry, pci_links); 536 537 devlist_entry->conf.pc_sel.pc_domain = cfg->domain; 538 devlist_entry->conf.pc_sel.pc_bus = cfg->bus; 539 devlist_entry->conf.pc_sel.pc_dev = cfg->slot; 540 devlist_entry->conf.pc_sel.pc_func = cfg->func; 541 devlist_entry->conf.pc_hdr = cfg->hdrtype; 542 543 devlist_entry->conf.pc_subvendor = cfg->subvendor; 544 devlist_entry->conf.pc_subdevice = cfg->subdevice; 545 devlist_entry->conf.pc_vendor = cfg->vendor; 546 devlist_entry->conf.pc_device = cfg->device; 547 548 devlist_entry->conf.pc_class = cfg->baseclass; 549 devlist_entry->conf.pc_subclass = cfg->subclass; 550 devlist_entry->conf.pc_progif = cfg->progif; 551 devlist_entry->conf.pc_revid = cfg->revid; 552 553 pci_numdevs++; 554 pci_generation++; 555 } 556 return (devlist_entry); 557#undef REG 558} 559 560static void 561pci_read_extcap(device_t pcib, pcicfgregs *cfg) 562{ 563#define REG(n, w) PCIB_READ_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, w) 564#define WREG(n, v, w) PCIB_WRITE_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, v, w) 565#if defined(__i386__) || defined(__amd64__) || defined(__powerpc__) 566 uint64_t addr; 567#endif 568 uint32_t val; 569 int ptr, nextptr, ptrptr; 570 571 switch (cfg->hdrtype & PCIM_HDRTYPE) { 572 case 0: 573 case 1: 574 ptrptr = PCIR_CAP_PTR; 575 break; 576 case 2: 577 ptrptr = PCIR_CAP_PTR_2; /* cardbus capabilities ptr */ 578 break; 579 default: 580 return; /* no extended capabilities support */ 581 } 582 nextptr = REG(ptrptr, 1); /* sanity check? */ 583 584 /* 585 * Read capability entries. 586 */ 587 while (nextptr != 0) { 588 /* Sanity check */ 589 if (nextptr > 255) { 590 printf("illegal PCI extended capability offset %d\n", 591 nextptr); 592 return; 593 } 594 /* Find the next entry */ 595 ptr = nextptr; 596 nextptr = REG(ptr + PCICAP_NEXTPTR, 1); 597 598 /* Process this entry */ 599 switch (REG(ptr + PCICAP_ID, 1)) { 600 case PCIY_PMG: /* PCI power management */ 601 if (cfg->pp.pp_cap == 0) { 602 cfg->pp.pp_cap = REG(ptr + PCIR_POWER_CAP, 2); 603 cfg->pp.pp_status = ptr + PCIR_POWER_STATUS; 604 cfg->pp.pp_pmcsr = ptr + PCIR_POWER_PMCSR; 605 if ((nextptr - ptr) > PCIR_POWER_DATA) 606 cfg->pp.pp_data = ptr + PCIR_POWER_DATA; 607 } 608 break; 609#if defined(__i386__) || defined(__amd64__) || defined(__powerpc__) 610 case PCIY_HT: /* HyperTransport */ 611 /* Determine HT-specific capability type. */ 612 val = REG(ptr + PCIR_HT_COMMAND, 2); 613 switch (val & PCIM_HTCMD_CAP_MASK) { 614 case PCIM_HTCAP_MSI_MAPPING: 615 if (!(val & PCIM_HTCMD_MSI_FIXED)) { 616 /* Sanity check the mapping window. */ 617 addr = REG(ptr + PCIR_HTMSI_ADDRESS_HI, 618 4); 619 addr <<= 32; 620 addr |= REG(ptr + PCIR_HTMSI_ADDRESS_LO, 621 4); 622 if (addr != MSI_INTEL_ADDR_BASE) 623 device_printf(pcib, 624 "HT Bridge at pci%d:%d:%d:%d has non-default MSI window 0x%llx\n", 625 cfg->domain, cfg->bus, 626 cfg->slot, cfg->func, 627 (long long)addr); 628 } else 629 addr = MSI_INTEL_ADDR_BASE; 630 631 cfg->ht.ht_msimap = ptr; 632 cfg->ht.ht_msictrl = val; 633 cfg->ht.ht_msiaddr = addr; 634 break; 635 } 636 break; 637#endif 638 case PCIY_MSI: /* PCI MSI */ 639 cfg->msi.msi_location = ptr; 640 cfg->msi.msi_ctrl = REG(ptr + PCIR_MSI_CTRL, 2); 641 cfg->msi.msi_msgnum = 1 << ((cfg->msi.msi_ctrl & 642 PCIM_MSICTRL_MMC_MASK)>>1); 643 break; 644 case PCIY_MSIX: /* PCI MSI-X */ 645 cfg->msix.msix_location = ptr; 646 cfg->msix.msix_ctrl = REG(ptr + PCIR_MSIX_CTRL, 2); 647 cfg->msix.msix_msgnum = (cfg->msix.msix_ctrl & 648 PCIM_MSIXCTRL_TABLE_SIZE) + 1; 649 val = REG(ptr + PCIR_MSIX_TABLE, 4); 650 cfg->msix.msix_table_bar = PCIR_BAR(val & 651 PCIM_MSIX_BIR_MASK); 652 cfg->msix.msix_table_offset = val & ~PCIM_MSIX_BIR_MASK; 653 val = REG(ptr + PCIR_MSIX_PBA, 4); 654 cfg->msix.msix_pba_bar = PCIR_BAR(val & 655 PCIM_MSIX_BIR_MASK); 656 cfg->msix.msix_pba_offset = val & ~PCIM_MSIX_BIR_MASK; 657 break; 658 case PCIY_VPD: /* PCI Vital Product Data */ 659 cfg->vpd.vpd_reg = ptr; 660 break; 661 case PCIY_SUBVENDOR: 662 /* Should always be true. */ 663 if ((cfg->hdrtype & PCIM_HDRTYPE) == 1) { 664 val = REG(ptr + PCIR_SUBVENDCAP_ID, 4); 665 cfg->subvendor = val & 0xffff; 666 cfg->subdevice = val >> 16; 667 } 668 break; 669 case PCIY_PCIX: /* PCI-X */ 670 /* 671 * Assume we have a PCI-X chipset if we have 672 * at least one PCI-PCI bridge with a PCI-X 673 * capability. Note that some systems with 674 * PCI-express or HT chipsets might match on 675 * this check as well. 676 */ 677 if ((cfg->hdrtype & PCIM_HDRTYPE) == 1) 678 pcix_chipset = 1; 679 break; 680 case PCIY_EXPRESS: /* PCI-express */ 681 /* 682 * Assume we have a PCI-express chipset if we have 683 * at least one PCI-express device. 684 */ 685 pcie_chipset = 1; 686 break; 687 default: 688 break; 689 } 690 } 691/* REG and WREG use carry through to next functions */ 692} 693 694/* 695 * PCI Vital Product Data 696 */ 697 698#define PCI_VPD_TIMEOUT 1000000 699 700static int 701pci_read_vpd_reg(device_t pcib, pcicfgregs *cfg, int reg, uint32_t *data) 702{ 703 int count = PCI_VPD_TIMEOUT; 704 705 KASSERT((reg & 3) == 0, ("VPD register must by 4 byte aligned")); 706 707 WREG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, reg, 2); 708 709 while ((REG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, 2) & 0x8000) != 0x8000) { 710 if (--count < 0) 711 return (ENXIO); 712 DELAY(1); /* limit looping */ 713 } 714 *data = (REG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, 4)); 715 716 return (0); 717} 718 719#if 0 720static int 721pci_write_vpd_reg(device_t pcib, pcicfgregs *cfg, int reg, uint32_t data) 722{ 723 int count = PCI_VPD_TIMEOUT; 724 725 KASSERT((reg & 3) == 0, ("VPD register must by 4 byte aligned")); 726 727 WREG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, data, 4); 728 WREG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, reg | 0x8000, 2); 729 while ((REG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, 2) & 0x8000) == 0x8000) { 730 if (--count < 0) 731 return (ENXIO); 732 DELAY(1); /* limit looping */ 733 } 734 735 return (0); 736} 737#endif 738 739#undef PCI_VPD_TIMEOUT 740 741struct vpd_readstate { 742 device_t pcib; 743 pcicfgregs *cfg; 744 uint32_t val; 745 int bytesinval; 746 int off; 747 uint8_t cksum; 748}; 749 750static int 751vpd_nextbyte(struct vpd_readstate *vrs, uint8_t *data) 752{ 753 uint32_t reg; 754 uint8_t byte; 755 756 if (vrs->bytesinval == 0) { 757 if (pci_read_vpd_reg(vrs->pcib, vrs->cfg, vrs->off, ®)) 758 return (ENXIO); 759 vrs->val = le32toh(reg); 760 vrs->off += 4; 761 byte = vrs->val & 0xff; 762 vrs->bytesinval = 3; 763 } else { 764 vrs->val = vrs->val >> 8; 765 byte = vrs->val & 0xff; 766 vrs->bytesinval--; 767 } 768 769 vrs->cksum += byte; 770 *data = byte; 771 return (0); 772} 773 774static void 775pci_read_vpd(device_t pcib, pcicfgregs *cfg) 776{ 777 struct vpd_readstate vrs; 778 int state; 779 int name; 780 int remain; 781 int i; 782 int alloc, off; /* alloc/off for RO/W arrays */ 783 int cksumvalid; 784 int dflen; 785 uint8_t byte; 786 uint8_t byte2; 787 788 /* init vpd reader */ 789 vrs.bytesinval = 0; 790 vrs.off = 0; 791 vrs.pcib = pcib; 792 vrs.cfg = cfg; 793 vrs.cksum = 0; 794 795 state = 0; 796 name = remain = i = 0; /* shut up stupid gcc */ 797 alloc = off = 0; /* shut up stupid gcc */ 798 dflen = 0; /* shut up stupid gcc */ 799 cksumvalid = -1; 800 while (state >= 0) { 801 if (vpd_nextbyte(&vrs, &byte)) { 802 state = -2; 803 break; 804 } 805#if 0 806 printf("vpd: val: %#x, off: %d, bytesinval: %d, byte: %#hhx, " \ 807 "state: %d, remain: %d, name: %#x, i: %d\n", vrs.val, 808 vrs.off, vrs.bytesinval, byte, state, remain, name, i); 809#endif 810 switch (state) { 811 case 0: /* item name */ 812 if (byte & 0x80) { 813 if (vpd_nextbyte(&vrs, &byte2)) { 814 state = -2; 815 break; 816 } 817 remain = byte2; 818 if (vpd_nextbyte(&vrs, &byte2)) { 819 state = -2; 820 break; 821 } 822 remain |= byte2 << 8; 823 if (remain > (0x7f*4 - vrs.off)) { 824 state = -1; 825 printf( 826 "pci%d:%d:%d:%d: invalid VPD data, remain %#x\n", 827 cfg->domain, cfg->bus, cfg->slot, 828 cfg->func, remain); 829 } 830 name = byte & 0x7f; 831 } else { 832 remain = byte & 0x7; 833 name = (byte >> 3) & 0xf; 834 } 835 switch (name) { 836 case 0x2: /* String */ 837 cfg->vpd.vpd_ident = malloc(remain + 1, 838 M_DEVBUF, M_WAITOK); 839 i = 0; 840 state = 1; 841 break; 842 case 0xf: /* End */ 843 state = -1; 844 break; 845 case 0x10: /* VPD-R */ 846 alloc = 8; 847 off = 0; 848 cfg->vpd.vpd_ros = malloc(alloc * 849 sizeof(*cfg->vpd.vpd_ros), M_DEVBUF, 850 M_WAITOK | M_ZERO); 851 state = 2; 852 break; 853 case 0x11: /* VPD-W */ 854 alloc = 8; 855 off = 0; 856 cfg->vpd.vpd_w = malloc(alloc * 857 sizeof(*cfg->vpd.vpd_w), M_DEVBUF, 858 M_WAITOK | M_ZERO); 859 state = 5; 860 break; 861 default: /* Invalid data, abort */ 862 state = -1; 863 break; 864 } 865 break; 866 867 case 1: /* Identifier String */ 868 cfg->vpd.vpd_ident[i++] = byte; 869 remain--; 870 if (remain == 0) { 871 cfg->vpd.vpd_ident[i] = '\0'; 872 state = 0; 873 } 874 break; 875 876 case 2: /* VPD-R Keyword Header */ 877 if (off == alloc) { 878 cfg->vpd.vpd_ros = reallocf(cfg->vpd.vpd_ros, 879 (alloc *= 2) * sizeof(*cfg->vpd.vpd_ros), 880 M_DEVBUF, M_WAITOK | M_ZERO); 881 } 882 cfg->vpd.vpd_ros[off].keyword[0] = byte; 883 if (vpd_nextbyte(&vrs, &byte2)) { 884 state = -2; 885 break; 886 } 887 cfg->vpd.vpd_ros[off].keyword[1] = byte2; 888 if (vpd_nextbyte(&vrs, &byte2)) { 889 state = -2; 890 break; 891 } 892 dflen = byte2; 893 if (dflen == 0 && 894 strncmp(cfg->vpd.vpd_ros[off].keyword, "RV", 895 2) == 0) { 896 /* 897 * if this happens, we can't trust the rest 898 * of the VPD. 899 */ 900 printf( 901 "pci%d:%d:%d:%d: bad keyword length: %d\n", 902 cfg->domain, cfg->bus, cfg->slot, 903 cfg->func, dflen); 904 cksumvalid = 0; 905 state = -1; 906 break; 907 } else if (dflen == 0) { 908 cfg->vpd.vpd_ros[off].value = malloc(1 * 909 sizeof(*cfg->vpd.vpd_ros[off].value), 910 M_DEVBUF, M_WAITOK); 911 cfg->vpd.vpd_ros[off].value[0] = '\x00'; 912 } else 913 cfg->vpd.vpd_ros[off].value = malloc( 914 (dflen + 1) * 915 sizeof(*cfg->vpd.vpd_ros[off].value), 916 M_DEVBUF, M_WAITOK); 917 remain -= 3; 918 i = 0; 919 /* keep in sync w/ state 3's transistions */ 920 if (dflen == 0 && remain == 0) 921 state = 0; 922 else if (dflen == 0) 923 state = 2; 924 else 925 state = 3; 926 break; 927 928 case 3: /* VPD-R Keyword Value */ 929 cfg->vpd.vpd_ros[off].value[i++] = byte; 930 if (strncmp(cfg->vpd.vpd_ros[off].keyword, 931 "RV", 2) == 0 && cksumvalid == -1) { 932 if (vrs.cksum == 0) 933 cksumvalid = 1; 934 else { 935 if (bootverbose) 936 printf( 937 "pci%d:%d:%d:%d: bad VPD cksum, remain %hhu\n", 938 cfg->domain, cfg->bus, 939 cfg->slot, cfg->func, 940 vrs.cksum); 941 cksumvalid = 0; 942 state = -1; 943 break; 944 } 945 } 946 dflen--; 947 remain--; 948 /* keep in sync w/ state 2's transistions */ 949 if (dflen == 0) 950 cfg->vpd.vpd_ros[off++].value[i++] = '\0'; 951 if (dflen == 0 && remain == 0) { 952 cfg->vpd.vpd_rocnt = off; 953 cfg->vpd.vpd_ros = reallocf(cfg->vpd.vpd_ros, 954 off * sizeof(*cfg->vpd.vpd_ros), 955 M_DEVBUF, M_WAITOK | M_ZERO); 956 state = 0; 957 } else if (dflen == 0) 958 state = 2; 959 break; 960 961 case 4: 962 remain--; 963 if (remain == 0) 964 state = 0; 965 break; 966 967 case 5: /* VPD-W Keyword Header */ 968 if (off == alloc) { 969 cfg->vpd.vpd_w = reallocf(cfg->vpd.vpd_w, 970 (alloc *= 2) * sizeof(*cfg->vpd.vpd_w), 971 M_DEVBUF, M_WAITOK | M_ZERO); 972 } 973 cfg->vpd.vpd_w[off].keyword[0] = byte; 974 if (vpd_nextbyte(&vrs, &byte2)) { 975 state = -2; 976 break; 977 } 978 cfg->vpd.vpd_w[off].keyword[1] = byte2; 979 if (vpd_nextbyte(&vrs, &byte2)) { 980 state = -2; 981 break; 982 } 983 cfg->vpd.vpd_w[off].len = dflen = byte2; 984 cfg->vpd.vpd_w[off].start = vrs.off - vrs.bytesinval; 985 cfg->vpd.vpd_w[off].value = malloc((dflen + 1) * 986 sizeof(*cfg->vpd.vpd_w[off].value), 987 M_DEVBUF, M_WAITOK); 988 remain -= 3; 989 i = 0; 990 /* keep in sync w/ state 6's transistions */ 991 if (dflen == 0 && remain == 0) 992 state = 0; 993 else if (dflen == 0) 994 state = 5; 995 else 996 state = 6; 997 break; 998 999 case 6: /* VPD-W Keyword Value */ 1000 cfg->vpd.vpd_w[off].value[i++] = byte; 1001 dflen--; 1002 remain--; 1003 /* keep in sync w/ state 5's transistions */ 1004 if (dflen == 0) 1005 cfg->vpd.vpd_w[off++].value[i++] = '\0'; 1006 if (dflen == 0 && remain == 0) { 1007 cfg->vpd.vpd_wcnt = off; 1008 cfg->vpd.vpd_w = reallocf(cfg->vpd.vpd_w, 1009 off * sizeof(*cfg->vpd.vpd_w), 1010 M_DEVBUF, M_WAITOK | M_ZERO); 1011 state = 0; 1012 } else if (dflen == 0) 1013 state = 5; 1014 break; 1015 1016 default: 1017 printf("pci%d:%d:%d:%d: invalid state: %d\n", 1018 cfg->domain, cfg->bus, cfg->slot, cfg->func, 1019 state); 1020 state = -1; 1021 break; 1022 } 1023 } 1024 1025 if (cksumvalid == 0 || state < -1) { 1026 /* read-only data bad, clean up */ 1027 if (cfg->vpd.vpd_ros != NULL) { 1028 for (off = 0; cfg->vpd.vpd_ros[off].value; off++) 1029 free(cfg->vpd.vpd_ros[off].value, M_DEVBUF); 1030 free(cfg->vpd.vpd_ros, M_DEVBUF); 1031 cfg->vpd.vpd_ros = NULL; 1032 } 1033 } 1034 if (state < -1) { 1035 /* I/O error, clean up */ 1036 printf("pci%d:%d:%d:%d: failed to read VPD data.\n", 1037 cfg->domain, cfg->bus, cfg->slot, cfg->func); 1038 if (cfg->vpd.vpd_ident != NULL) { 1039 free(cfg->vpd.vpd_ident, M_DEVBUF); 1040 cfg->vpd.vpd_ident = NULL; 1041 } 1042 if (cfg->vpd.vpd_w != NULL) { 1043 for (off = 0; cfg->vpd.vpd_w[off].value; off++) 1044 free(cfg->vpd.vpd_w[off].value, M_DEVBUF); 1045 free(cfg->vpd.vpd_w, M_DEVBUF); 1046 cfg->vpd.vpd_w = NULL; 1047 } 1048 } 1049 cfg->vpd.vpd_cached = 1; 1050#undef REG 1051#undef WREG 1052} 1053 1054int 1055pci_get_vpd_ident_method(device_t dev, device_t child, const char **identptr) 1056{ 1057 struct pci_devinfo *dinfo = device_get_ivars(child); 1058 pcicfgregs *cfg = &dinfo->cfg; 1059 1060 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0) 1061 pci_read_vpd(device_get_parent(dev), cfg); 1062 1063 *identptr = cfg->vpd.vpd_ident; 1064 1065 if (*identptr == NULL) 1066 return (ENXIO); 1067 1068 return (0); 1069} 1070 1071int 1072pci_get_vpd_readonly_method(device_t dev, device_t child, const char *kw, 1073 const char **vptr) 1074{ 1075 struct pci_devinfo *dinfo = device_get_ivars(child); 1076 pcicfgregs *cfg = &dinfo->cfg; 1077 int i; 1078 1079 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0) 1080 pci_read_vpd(device_get_parent(dev), cfg); 1081 1082 for (i = 0; i < cfg->vpd.vpd_rocnt; i++) 1083 if (memcmp(kw, cfg->vpd.vpd_ros[i].keyword, 1084 sizeof(cfg->vpd.vpd_ros[i].keyword)) == 0) { 1085 *vptr = cfg->vpd.vpd_ros[i].value; 1086 } 1087 1088 if (i != cfg->vpd.vpd_rocnt) 1089 return (0); 1090 1091 *vptr = NULL; 1092 return (ENXIO); 1093} 1094 1095/* 1096 * Find the requested extended capability and return the offset in 1097 * configuration space via the pointer provided. The function returns 1098 * 0 on success and error code otherwise. 1099 */ 1100int 1101pci_find_extcap_method(device_t dev, device_t child, int capability, 1102 int *capreg) 1103{ 1104 struct pci_devinfo *dinfo = device_get_ivars(child); 1105 pcicfgregs *cfg = &dinfo->cfg; 1106 u_int32_t status; 1107 u_int8_t ptr; 1108 1109 /* 1110 * Check the CAP_LIST bit of the PCI status register first. 1111 */ 1112 status = pci_read_config(child, PCIR_STATUS, 2); 1113 if (!(status & PCIM_STATUS_CAPPRESENT)) 1114 return (ENXIO); 1115 1116 /* 1117 * Determine the start pointer of the capabilities list. 1118 */ 1119 switch (cfg->hdrtype & PCIM_HDRTYPE) { 1120 case 0: 1121 case 1: 1122 ptr = PCIR_CAP_PTR; 1123 break; 1124 case 2: 1125 ptr = PCIR_CAP_PTR_2; 1126 break; 1127 default: 1128 /* XXX: panic? */ 1129 return (ENXIO); /* no extended capabilities support */ 1130 } 1131 ptr = pci_read_config(child, ptr, 1); 1132 1133 /* 1134 * Traverse the capabilities list. 1135 */ 1136 while (ptr != 0) { 1137 if (pci_read_config(child, ptr + PCICAP_ID, 1) == capability) { 1138 if (capreg != NULL) 1139 *capreg = ptr; 1140 return (0); 1141 } 1142 ptr = pci_read_config(child, ptr + PCICAP_NEXTPTR, 1); 1143 } 1144 1145 return (ENOENT); 1146} 1147 1148/* 1149 * Support for MSI-X message interrupts. 1150 */ 1151void 1152pci_enable_msix(device_t dev, u_int index, uint64_t address, uint32_t data) 1153{ 1154 struct pci_devinfo *dinfo = device_get_ivars(dev); 1155 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1156 uint32_t offset; 1157 1158 KASSERT(msix->msix_table_len > index, ("bogus index")); 1159 offset = msix->msix_table_offset + index * 16; 1160 bus_write_4(msix->msix_table_res, offset, address & 0xffffffff); 1161 bus_write_4(msix->msix_table_res, offset + 4, address >> 32); 1162 bus_write_4(msix->msix_table_res, offset + 8, data); 1163 1164 /* Enable MSI -> HT mapping. */ 1165 pci_ht_map_msi(dev, address); 1166} 1167 1168void 1169pci_mask_msix(device_t dev, u_int index) 1170{ 1171 struct pci_devinfo *dinfo = device_get_ivars(dev); 1172 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1173 uint32_t offset, val; 1174 1175 KASSERT(msix->msix_msgnum > index, ("bogus index")); 1176 offset = msix->msix_table_offset + index * 16 + 12; 1177 val = bus_read_4(msix->msix_table_res, offset); 1178 if (!(val & PCIM_MSIX_VCTRL_MASK)) { 1179 val |= PCIM_MSIX_VCTRL_MASK; 1180 bus_write_4(msix->msix_table_res, offset, val); 1181 } 1182} 1183 1184void 1185pci_unmask_msix(device_t dev, u_int index) 1186{ 1187 struct pci_devinfo *dinfo = device_get_ivars(dev); 1188 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1189 uint32_t offset, val; 1190 1191 KASSERT(msix->msix_table_len > index, ("bogus index")); 1192 offset = msix->msix_table_offset + index * 16 + 12; 1193 val = bus_read_4(msix->msix_table_res, offset); 1194 if (val & PCIM_MSIX_VCTRL_MASK) { 1195 val &= ~PCIM_MSIX_VCTRL_MASK; 1196 bus_write_4(msix->msix_table_res, offset, val); 1197 } 1198} 1199 1200int 1201pci_pending_msix(device_t dev, u_int index) 1202{ 1203 struct pci_devinfo *dinfo = device_get_ivars(dev); 1204 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1205 uint32_t offset, bit; 1206 1207 KASSERT(msix->msix_table_len > index, ("bogus index")); 1208 offset = msix->msix_pba_offset + (index / 32) * 4; 1209 bit = 1 << index % 32; 1210 return (bus_read_4(msix->msix_pba_res, offset) & bit); 1211} 1212 1213/* 1214 * Restore MSI-X registers and table during resume. If MSI-X is 1215 * enabled then walk the virtual table to restore the actual MSI-X 1216 * table. 1217 */ 1218static void 1219pci_resume_msix(device_t dev) 1220{ 1221 struct pci_devinfo *dinfo = device_get_ivars(dev); 1222 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1223 struct msix_table_entry *mte; 1224 struct msix_vector *mv; 1225 int i; 1226 1227 if (msix->msix_alloc > 0) { 1228 /* First, mask all vectors. */ 1229 for (i = 0; i < msix->msix_msgnum; i++) 1230 pci_mask_msix(dev, i); 1231 1232 /* Second, program any messages with at least one handler. */ 1233 for (i = 0; i < msix->msix_table_len; i++) { 1234 mte = &msix->msix_table[i]; 1235 if (mte->mte_vector == 0 || mte->mte_handlers == 0) 1236 continue; 1237 mv = &msix->msix_vectors[mte->mte_vector - 1]; 1238 pci_enable_msix(dev, i, mv->mv_address, mv->mv_data); 1239 pci_unmask_msix(dev, i); 1240 } 1241 } 1242 pci_write_config(dev, msix->msix_location + PCIR_MSIX_CTRL, 1243 msix->msix_ctrl, 2); 1244} 1245 1246/* 1247 * Attempt to allocate *count MSI-X messages. The actual number allocated is 1248 * returned in *count. After this function returns, each message will be 1249 * available to the driver as SYS_RES_IRQ resources starting at rid 1. 1250 */ 1251int 1252pci_alloc_msix_method(device_t dev, device_t child, int *count) 1253{ 1254 struct pci_devinfo *dinfo = device_get_ivars(child); 1255 pcicfgregs *cfg = &dinfo->cfg; 1256 struct resource_list_entry *rle; 1257 int actual, error, i, irq, max; 1258 1259 /* Don't let count == 0 get us into trouble. */ 1260 if (*count == 0) 1261 return (EINVAL); 1262 1263 /* If rid 0 is allocated, then fail. */ 1264 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0); 1265 if (rle != NULL && rle->res != NULL) 1266 return (ENXIO); 1267 1268 /* Already have allocated messages? */ 1269 if (cfg->msi.msi_alloc != 0 || cfg->msix.msix_alloc != 0) 1270 return (ENXIO); 1271 1272 /* If MSI is blacklisted for this system, fail. */ 1273 if (pci_msi_blacklisted()) 1274 return (ENXIO); 1275 1276 /* MSI-X capability present? */ 1277 if (cfg->msix.msix_location == 0 || !pci_do_msix) 1278 return (ENODEV); 1279 1280 /* Make sure the appropriate BARs are mapped. */ 1281 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY, 1282 cfg->msix.msix_table_bar); 1283 if (rle == NULL || rle->res == NULL || 1284 !(rman_get_flags(rle->res) & RF_ACTIVE)) 1285 return (ENXIO); 1286 cfg->msix.msix_table_res = rle->res; 1287 if (cfg->msix.msix_pba_bar != cfg->msix.msix_table_bar) { 1288 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY, 1289 cfg->msix.msix_pba_bar); 1290 if (rle == NULL || rle->res == NULL || 1291 !(rman_get_flags(rle->res) & RF_ACTIVE)) 1292 return (ENXIO); 1293 } 1294 cfg->msix.msix_pba_res = rle->res; 1295 1296 if (bootverbose) 1297 device_printf(child, 1298 "attempting to allocate %d MSI-X vectors (%d supported)\n", 1299 *count, cfg->msix.msix_msgnum); 1300 max = min(*count, cfg->msix.msix_msgnum); 1301 for (i = 0; i < max; i++) { 1302 /* Allocate a message. */ 1303 error = PCIB_ALLOC_MSIX(device_get_parent(dev), child, &irq); 1304 if (error) 1305 break; 1306 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, irq, 1307 irq, 1); 1308 } 1309 actual = i; 1310 1311 if (bootverbose) { 1312 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 1); 1313 if (actual == 1) 1314 device_printf(child, "using IRQ %lu for MSI-X\n", 1315 rle->start); 1316 else { 1317 int run; 1318 1319 /* 1320 * Be fancy and try to print contiguous runs of 1321 * IRQ values as ranges. 'irq' is the previous IRQ. 1322 * 'run' is true if we are in a range. 1323 */ 1324 device_printf(child, "using IRQs %lu", rle->start); 1325 irq = rle->start; 1326 run = 0; 1327 for (i = 1; i < actual; i++) { 1328 rle = resource_list_find(&dinfo->resources, 1329 SYS_RES_IRQ, i + 1); 1330 1331 /* Still in a run? */ 1332 if (rle->start == irq + 1) { 1333 run = 1; 1334 irq++; 1335 continue; 1336 } 1337 1338 /* Finish previous range. */ 1339 if (run) { 1340 printf("-%d", irq); 1341 run = 0; 1342 } 1343 1344 /* Start new range. */ 1345 printf(",%lu", rle->start); 1346 irq = rle->start; 1347 } 1348 1349 /* Unfinished range? */ 1350 if (run) 1351 printf("-%d", irq); 1352 printf(" for MSI-X\n"); 1353 } 1354 } 1355 1356 /* Mask all vectors. */ 1357 for (i = 0; i < cfg->msix.msix_msgnum; i++) 1358 pci_mask_msix(child, i); 1359 1360 /* Allocate and initialize vector data and virtual table. */ 1361 cfg->msix.msix_vectors = malloc(sizeof(struct msix_vector) * actual, 1362 M_DEVBUF, M_WAITOK | M_ZERO); 1363 cfg->msix.msix_table = malloc(sizeof(struct msix_table_entry) * actual, 1364 M_DEVBUF, M_WAITOK | M_ZERO); 1365 for (i = 0; i < actual; i++) { 1366 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1); 1367 cfg->msix.msix_vectors[i].mv_irq = rle->start; 1368 cfg->msix.msix_table[i].mte_vector = i + 1; 1369 } 1370 1371 /* Update control register to enable MSI-X. */ 1372 cfg->msix.msix_ctrl |= PCIM_MSIXCTRL_MSIX_ENABLE; 1373 pci_write_config(child, cfg->msix.msix_location + PCIR_MSIX_CTRL, 1374 cfg->msix.msix_ctrl, 2); 1375 1376 /* Update counts of alloc'd messages. */ 1377 cfg->msix.msix_alloc = actual; 1378 cfg->msix.msix_table_len = actual; 1379 *count = actual; 1380 return (0); 1381} 1382 1383/* 1384 * By default, pci_alloc_msix() will assign the allocated IRQ 1385 * resources consecutively to the first N messages in the MSI-X table. 1386 * However, device drivers may want to use different layouts if they 1387 * either receive fewer messages than they asked for, or they wish to 1388 * populate the MSI-X table sparsely. This method allows the driver 1389 * to specify what layout it wants. It must be called after a 1390 * successful pci_alloc_msix() but before any of the associated 1391 * SYS_RES_IRQ resources are allocated via bus_alloc_resource(). 1392 * 1393 * The 'vectors' array contains 'count' message vectors. The array 1394 * maps directly to the MSI-X table in that index 0 in the array 1395 * specifies the vector for the first message in the MSI-X table, etc. 1396 * The vector value in each array index can either be 0 to indicate 1397 * that no vector should be assigned to a message slot, or it can be a 1398 * number from 1 to N (where N is the count returned from a 1399 * succcessful call to pci_alloc_msix()) to indicate which message 1400 * vector (IRQ) to be used for the corresponding message. 1401 * 1402 * On successful return, each message with a non-zero vector will have 1403 * an associated SYS_RES_IRQ whose rid is equal to the array index + 1404 * 1. Additionally, if any of the IRQs allocated via the previous 1405 * call to pci_alloc_msix() are not used in the mapping, those IRQs 1406 * will be freed back to the system automatically. 1407 * 1408 * For example, suppose a driver has a MSI-X table with 6 messages and 1409 * asks for 6 messages, but pci_alloc_msix() only returns a count of 1410 * 3. Call the three vectors allocated by pci_alloc_msix() A, B, and 1411 * C. After the call to pci_alloc_msix(), the device will be setup to 1412 * have an MSI-X table of ABC--- (where - means no vector assigned). 1413 * If the driver ten passes a vector array of { 1, 0, 1, 2, 0, 2 }, 1414 * then the MSI-X table will look like A-AB-B, and the 'C' vector will 1415 * be freed back to the system. This device will also have valid 1416 * SYS_RES_IRQ rids of 1, 3, 4, and 6. 1417 * 1418 * In any case, the SYS_RES_IRQ rid X will always map to the message 1419 * at MSI-X table index X - 1 and will only be valid if a vector is 1420 * assigned to that table entry. 1421 */ 1422int 1423pci_remap_msix_method(device_t dev, device_t child, int count, 1424 const u_int *vectors) 1425{ 1426 struct pci_devinfo *dinfo = device_get_ivars(child); 1427 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1428 struct resource_list_entry *rle; 1429 int i, irq, j, *used; 1430 1431 /* 1432 * Have to have at least one message in the table but the 1433 * table can't be bigger than the actual MSI-X table in the 1434 * device. 1435 */ 1436 if (count == 0 || count > msix->msix_msgnum) 1437 return (EINVAL); 1438 1439 /* Sanity check the vectors. */ 1440 for (i = 0; i < count; i++) 1441 if (vectors[i] > msix->msix_alloc) 1442 return (EINVAL); 1443 1444 /* 1445 * Make sure there aren't any holes in the vectors to be used. 1446 * It's a big pain to support it, and it doesn't really make 1447 * sense anyway. Also, at least one vector must be used. 1448 */ 1449 used = malloc(sizeof(int) * msix->msix_alloc, M_DEVBUF, M_WAITOK | 1450 M_ZERO); 1451 for (i = 0; i < count; i++) 1452 if (vectors[i] != 0) 1453 used[vectors[i] - 1] = 1; 1454 for (i = 0; i < msix->msix_alloc - 1; i++) 1455 if (used[i] == 0 && used[i + 1] == 1) { 1456 free(used, M_DEVBUF); 1457 return (EINVAL); 1458 } 1459 if (used[0] != 1) { 1460 free(used, M_DEVBUF); 1461 return (EINVAL); 1462 } 1463 1464 /* Make sure none of the resources are allocated. */ 1465 for (i = 0; i < msix->msix_table_len; i++) { 1466 if (msix->msix_table[i].mte_vector == 0) 1467 continue; 1468 if (msix->msix_table[i].mte_handlers > 0) 1469 return (EBUSY); 1470 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1); 1471 KASSERT(rle != NULL, ("missing resource")); 1472 if (rle->res != NULL) 1473 return (EBUSY); 1474 } 1475 1476 /* Free the existing resource list entries. */ 1477 for (i = 0; i < msix->msix_table_len; i++) { 1478 if (msix->msix_table[i].mte_vector == 0) 1479 continue; 1480 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1); 1481 } 1482 1483 /* 1484 * Build the new virtual table keeping track of which vectors are 1485 * used. 1486 */ 1487 free(msix->msix_table, M_DEVBUF); 1488 msix->msix_table = malloc(sizeof(struct msix_table_entry) * count, 1489 M_DEVBUF, M_WAITOK | M_ZERO); 1490 for (i = 0; i < count; i++) 1491 msix->msix_table[i].mte_vector = vectors[i]; 1492 msix->msix_table_len = count; 1493 1494 /* Free any unused IRQs and resize the vectors array if necessary. */ 1495 j = msix->msix_alloc - 1; 1496 if (used[j] == 0) { 1497 struct msix_vector *vec; 1498 1499 while (used[j] == 0) { 1500 PCIB_RELEASE_MSIX(device_get_parent(dev), child, 1501 msix->msix_vectors[j].mv_irq); 1502 j--; 1503 } 1504 vec = malloc(sizeof(struct msix_vector) * (j + 1), M_DEVBUF, 1505 M_WAITOK); 1506 bcopy(msix->msix_vectors, vec, sizeof(struct msix_vector) * 1507 (j + 1)); 1508 free(msix->msix_vectors, M_DEVBUF); 1509 msix->msix_vectors = vec; 1510 msix->msix_alloc = j + 1; 1511 } 1512 free(used, M_DEVBUF); 1513 1514 /* Map the IRQs onto the rids. */ 1515 for (i = 0; i < count; i++) { 1516 if (vectors[i] == 0) 1517 continue; 1518 irq = msix->msix_vectors[vectors[i]].mv_irq; 1519 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, irq, 1520 irq, 1); 1521 } 1522 1523 if (bootverbose) { 1524 device_printf(child, "Remapped MSI-X IRQs as: "); 1525 for (i = 0; i < count; i++) { 1526 if (i != 0) 1527 printf(", "); 1528 if (vectors[i] == 0) 1529 printf("---"); 1530 else 1531 printf("%d", 1532 msix->msix_vectors[vectors[i]].mv_irq); 1533 } 1534 printf("\n"); 1535 } 1536 1537 return (0); 1538} 1539 1540static int 1541pci_release_msix(device_t dev, device_t child) 1542{ 1543 struct pci_devinfo *dinfo = device_get_ivars(child); 1544 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1545 struct resource_list_entry *rle; 1546 int i; 1547 1548 /* Do we have any messages to release? */ 1549 if (msix->msix_alloc == 0) 1550 return (ENODEV); 1551 1552 /* Make sure none of the resources are allocated. */ 1553 for (i = 0; i < msix->msix_table_len; i++) { 1554 if (msix->msix_table[i].mte_vector == 0) 1555 continue; 1556 if (msix->msix_table[i].mte_handlers > 0) 1557 return (EBUSY); 1558 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1); 1559 KASSERT(rle != NULL, ("missing resource")); 1560 if (rle->res != NULL) 1561 return (EBUSY); 1562 } 1563 1564 /* Update control register to disable MSI-X. */ 1565 msix->msix_ctrl &= ~PCIM_MSIXCTRL_MSIX_ENABLE; 1566 pci_write_config(child, msix->msix_location + PCIR_MSIX_CTRL, 1567 msix->msix_ctrl, 2); 1568 1569 /* Free the resource list entries. */ 1570 for (i = 0; i < msix->msix_table_len; i++) { 1571 if (msix->msix_table[i].mte_vector == 0) 1572 continue; 1573 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1); 1574 } 1575 free(msix->msix_table, M_DEVBUF); 1576 msix->msix_table_len = 0; 1577 1578 /* Release the IRQs. */ 1579 for (i = 0; i < msix->msix_alloc; i++) 1580 PCIB_RELEASE_MSIX(device_get_parent(dev), child, 1581 msix->msix_vectors[i].mv_irq); 1582 free(msix->msix_vectors, M_DEVBUF); 1583 msix->msix_alloc = 0; 1584 return (0); 1585} 1586 1587/* 1588 * Return the max supported MSI-X messages this device supports. 1589 * Basically, assuming the MD code can alloc messages, this function 1590 * should return the maximum value that pci_alloc_msix() can return. 1591 * Thus, it is subject to the tunables, etc. 1592 */ 1593int 1594pci_msix_count_method(device_t dev, device_t child) 1595{ 1596 struct pci_devinfo *dinfo = device_get_ivars(child); 1597 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1598 1599 if (pci_do_msix && msix->msix_location != 0) 1600 return (msix->msix_msgnum); 1601 return (0); 1602} 1603 1604/* 1605 * HyperTransport MSI mapping control 1606 */ 1607void 1608pci_ht_map_msi(device_t dev, uint64_t addr) 1609{ 1610 struct pci_devinfo *dinfo = device_get_ivars(dev); 1611 struct pcicfg_ht *ht = &dinfo->cfg.ht; 1612 1613 if (!ht->ht_msimap) 1614 return; 1615 1616 if (addr && !(ht->ht_msictrl & PCIM_HTCMD_MSI_ENABLE) && 1617 ht->ht_msiaddr >> 20 == addr >> 20) { 1618 /* Enable MSI -> HT mapping. */ 1619 ht->ht_msictrl |= PCIM_HTCMD_MSI_ENABLE; 1620 pci_write_config(dev, ht->ht_msimap + PCIR_HT_COMMAND, 1621 ht->ht_msictrl, 2); 1622 } 1623 1624 if (!addr && ht->ht_msictrl & PCIM_HTCMD_MSI_ENABLE) { 1625 /* Disable MSI -> HT mapping. */ 1626 ht->ht_msictrl &= ~PCIM_HTCMD_MSI_ENABLE; 1627 pci_write_config(dev, ht->ht_msimap + PCIR_HT_COMMAND, 1628 ht->ht_msictrl, 2); 1629 } 1630} 1631 1632int 1633pci_get_max_read_req(device_t dev) 1634{ 1635 int cap; 1636 uint16_t val; 1637 1638 if (pci_find_extcap(dev, PCIY_EXPRESS, &cap) != 0) 1639 return (0); 1640 val = pci_read_config(dev, cap + PCIR_EXPRESS_DEVICE_CTL, 2); 1641 val &= PCIM_EXP_CTL_MAX_READ_REQUEST; 1642 val >>= 12; 1643 return (1 << (val + 7)); 1644} 1645 1646int 1647pci_set_max_read_req(device_t dev, int size) 1648{ 1649 int cap; 1650 uint16_t val; 1651 1652 if (pci_find_extcap(dev, PCIY_EXPRESS, &cap) != 0) 1653 return (0); 1654 if (size < 128) 1655 size = 128; 1656 if (size > 4096) 1657 size = 4096; 1658 size = (1 << (fls(size) - 1)); 1659 val = pci_read_config(dev, cap + PCIR_EXPRESS_DEVICE_CTL, 2); 1660 val &= ~PCIM_EXP_CTL_MAX_READ_REQUEST; 1661 val |= (fls(size) - 8) << 12; 1662 pci_write_config(dev, cap + PCIR_EXPRESS_DEVICE_CTL, val, 2); 1663 return (size); 1664} 1665 1666/* 1667 * Support for MSI message signalled interrupts. 1668 */ 1669void 1670pci_enable_msi(device_t dev, uint64_t address, uint16_t data) 1671{ 1672 struct pci_devinfo *dinfo = device_get_ivars(dev); 1673 struct pcicfg_msi *msi = &dinfo->cfg.msi; 1674 1675 /* Write data and address values. */ 1676 pci_write_config(dev, msi->msi_location + PCIR_MSI_ADDR, 1677 address & 0xffffffff, 4); 1678 if (msi->msi_ctrl & PCIM_MSICTRL_64BIT) { 1679 pci_write_config(dev, msi->msi_location + PCIR_MSI_ADDR_HIGH, 1680 address >> 32, 4); 1681 pci_write_config(dev, msi->msi_location + PCIR_MSI_DATA_64BIT, 1682 data, 2); 1683 } else 1684 pci_write_config(dev, msi->msi_location + PCIR_MSI_DATA, data, 1685 2); 1686 1687 /* Enable MSI in the control register. */ 1688 msi->msi_ctrl |= PCIM_MSICTRL_MSI_ENABLE; 1689 pci_write_config(dev, msi->msi_location + PCIR_MSI_CTRL, msi->msi_ctrl, 1690 2); 1691 1692 /* Enable MSI -> HT mapping. */ 1693 pci_ht_map_msi(dev, address); 1694} 1695 1696void 1697pci_disable_msi(device_t dev) 1698{ 1699 struct pci_devinfo *dinfo = device_get_ivars(dev); 1700 struct pcicfg_msi *msi = &dinfo->cfg.msi; 1701 1702 /* Disable MSI -> HT mapping. */ 1703 pci_ht_map_msi(dev, 0); 1704 1705 /* Disable MSI in the control register. */ 1706 msi->msi_ctrl &= ~PCIM_MSICTRL_MSI_ENABLE; 1707 pci_write_config(dev, msi->msi_location + PCIR_MSI_CTRL, msi->msi_ctrl, 1708 2); 1709} 1710 1711/* 1712 * Restore MSI registers during resume. If MSI is enabled then 1713 * restore the data and address registers in addition to the control 1714 * register. 1715 */ 1716static void 1717pci_resume_msi(device_t dev) 1718{ 1719 struct pci_devinfo *dinfo = device_get_ivars(dev); 1720 struct pcicfg_msi *msi = &dinfo->cfg.msi; 1721 uint64_t address; 1722 uint16_t data; 1723 1724 if (msi->msi_ctrl & PCIM_MSICTRL_MSI_ENABLE) { 1725 address = msi->msi_addr; 1726 data = msi->msi_data; 1727 pci_write_config(dev, msi->msi_location + PCIR_MSI_ADDR, 1728 address & 0xffffffff, 4); 1729 if (msi->msi_ctrl & PCIM_MSICTRL_64BIT) { 1730 pci_write_config(dev, msi->msi_location + 1731 PCIR_MSI_ADDR_HIGH, address >> 32, 4); 1732 pci_write_config(dev, msi->msi_location + 1733 PCIR_MSI_DATA_64BIT, data, 2); 1734 } else 1735 pci_write_config(dev, msi->msi_location + PCIR_MSI_DATA, 1736 data, 2); 1737 } 1738 pci_write_config(dev, msi->msi_location + PCIR_MSI_CTRL, msi->msi_ctrl, 1739 2); 1740} 1741 1742static int 1743pci_remap_intr_method(device_t bus, device_t dev, u_int irq) 1744{ 1745 struct pci_devinfo *dinfo = device_get_ivars(dev); 1746 pcicfgregs *cfg = &dinfo->cfg; 1747 struct resource_list_entry *rle; 1748 struct msix_table_entry *mte; 1749 struct msix_vector *mv; 1750 uint64_t addr; 1751 uint32_t data; 1752 int error, i, j; 1753 1754 /* 1755 * Handle MSI first. We try to find this IRQ among our list 1756 * of MSI IRQs. If we find it, we request updated address and 1757 * data registers and apply the results. 1758 */ 1759 if (cfg->msi.msi_alloc > 0) { 1760 1761 /* If we don't have any active handlers, nothing to do. */ 1762 if (cfg->msi.msi_handlers == 0) 1763 return (0); 1764 for (i = 0; i < cfg->msi.msi_alloc; i++) { 1765 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 1766 i + 1); 1767 if (rle->start == irq) { 1768 error = PCIB_MAP_MSI(device_get_parent(bus), 1769 dev, irq, &addr, &data); 1770 if (error) 1771 return (error); 1772 pci_disable_msi(dev); 1773 dinfo->cfg.msi.msi_addr = addr; 1774 dinfo->cfg.msi.msi_data = data; 1775 pci_enable_msi(dev, addr, data); 1776 return (0); 1777 } 1778 } 1779 return (ENOENT); 1780 } 1781 1782 /* 1783 * For MSI-X, we check to see if we have this IRQ. If we do, 1784 * we request the updated mapping info. If that works, we go 1785 * through all the slots that use this IRQ and update them. 1786 */ 1787 if (cfg->msix.msix_alloc > 0) { 1788 for (i = 0; i < cfg->msix.msix_alloc; i++) { 1789 mv = &cfg->msix.msix_vectors[i]; 1790 if (mv->mv_irq == irq) { 1791 error = PCIB_MAP_MSI(device_get_parent(bus), 1792 dev, irq, &addr, &data); 1793 if (error) 1794 return (error); 1795 mv->mv_address = addr; 1796 mv->mv_data = data; 1797 for (j = 0; j < cfg->msix.msix_table_len; j++) { 1798 mte = &cfg->msix.msix_table[j]; 1799 if (mte->mte_vector != i + 1) 1800 continue; 1801 if (mte->mte_handlers == 0) 1802 continue; 1803 pci_mask_msix(dev, j); 1804 pci_enable_msix(dev, j, addr, data); 1805 pci_unmask_msix(dev, j); 1806 } 1807 } 1808 } 1809 return (ENOENT); 1810 } 1811 1812 return (ENOENT); 1813} 1814 1815/* 1816 * Returns true if the specified device is blacklisted because MSI 1817 * doesn't work. 1818 */ 1819int 1820pci_msi_device_blacklisted(device_t dev) 1821{ 1822 struct pci_quirk *q; 1823 1824 if (!pci_honor_msi_blacklist) 1825 return (0); 1826 1827 for (q = &pci_quirks[0]; q->devid; q++) { 1828 if (q->devid == pci_get_devid(dev) && 1829 q->type == PCI_QUIRK_DISABLE_MSI) 1830 return (1); 1831 } 1832 return (0); 1833} 1834 1835/* 1836 * Determine if MSI is blacklisted globally on this sytem. Currently, 1837 * we just check for blacklisted chipsets as represented by the 1838 * host-PCI bridge at device 0:0:0. In the future, it may become 1839 * necessary to check other system attributes, such as the kenv values 1840 * that give the motherboard manufacturer and model number. 1841 */ 1842static int 1843pci_msi_blacklisted(void) 1844{ 1845 device_t dev; 1846 1847 if (!pci_honor_msi_blacklist) 1848 return (0); 1849 1850 /* Blacklist all non-PCI-express and non-PCI-X chipsets. */ 1851 if (!(pcie_chipset || pcix_chipset)) 1852 return (1); 1853 1854 dev = pci_find_bsf(0, 0, 0); 1855 if (dev != NULL) 1856 return (pci_msi_device_blacklisted(dev)); 1857 return (0); 1858} 1859 1860/* 1861 * Attempt to allocate *count MSI messages. The actual number allocated is 1862 * returned in *count. After this function returns, each message will be 1863 * available to the driver as SYS_RES_IRQ resources starting at a rid 1. 1864 */ 1865int 1866pci_alloc_msi_method(device_t dev, device_t child, int *count) 1867{ 1868 struct pci_devinfo *dinfo = device_get_ivars(child); 1869 pcicfgregs *cfg = &dinfo->cfg; 1870 struct resource_list_entry *rle; 1871 int actual, error, i, irqs[32]; 1872 uint16_t ctrl; 1873 1874 /* Don't let count == 0 get us into trouble. */ 1875 if (*count == 0) 1876 return (EINVAL); 1877 1878 /* If rid 0 is allocated, then fail. */ 1879 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0); 1880 if (rle != NULL && rle->res != NULL) 1881 return (ENXIO); 1882 1883 /* Already have allocated messages? */ 1884 if (cfg->msi.msi_alloc != 0 || cfg->msix.msix_alloc != 0) 1885 return (ENXIO); 1886 1887 /* If MSI is blacklisted for this system, fail. */ 1888 if (pci_msi_blacklisted()) 1889 return (ENXIO); 1890 1891 /* MSI capability present? */ 1892 if (cfg->msi.msi_location == 0 || !pci_do_msi) 1893 return (ENODEV); 1894 1895 if (bootverbose) 1896 device_printf(child, 1897 "attempting to allocate %d MSI vectors (%d supported)\n", 1898 *count, cfg->msi.msi_msgnum); 1899 1900 /* Don't ask for more than the device supports. */ 1901 actual = min(*count, cfg->msi.msi_msgnum); 1902 1903 /* Don't ask for more than 32 messages. */ 1904 actual = min(actual, 32); 1905 1906 /* MSI requires power of 2 number of messages. */ 1907 if (!powerof2(actual)) 1908 return (EINVAL); 1909 1910 for (;;) { 1911 /* Try to allocate N messages. */ 1912 error = PCIB_ALLOC_MSI(device_get_parent(dev), child, actual, 1913 cfg->msi.msi_msgnum, irqs); 1914 if (error == 0) 1915 break; 1916 if (actual == 1) 1917 return (error); 1918 1919 /* Try N / 2. */ 1920 actual >>= 1; 1921 } 1922 1923 /* 1924 * We now have N actual messages mapped onto SYS_RES_IRQ 1925 * resources in the irqs[] array, so add new resources 1926 * starting at rid 1. 1927 */ 1928 for (i = 0; i < actual; i++) 1929 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, 1930 irqs[i], irqs[i], 1); 1931 1932 if (bootverbose) { 1933 if (actual == 1) 1934 device_printf(child, "using IRQ %d for MSI\n", irqs[0]); 1935 else { 1936 int run; 1937 1938 /* 1939 * Be fancy and try to print contiguous runs 1940 * of IRQ values as ranges. 'run' is true if 1941 * we are in a range. 1942 */ 1943 device_printf(child, "using IRQs %d", irqs[0]); 1944 run = 0; 1945 for (i = 1; i < actual; i++) { 1946 1947 /* Still in a run? */ 1948 if (irqs[i] == irqs[i - 1] + 1) { 1949 run = 1; 1950 continue; 1951 } 1952 1953 /* Finish previous range. */ 1954 if (run) { 1955 printf("-%d", irqs[i - 1]); 1956 run = 0; 1957 } 1958 1959 /* Start new range. */ 1960 printf(",%d", irqs[i]); 1961 } 1962 1963 /* Unfinished range? */ 1964 if (run) 1965 printf("-%d", irqs[actual - 1]); 1966 printf(" for MSI\n"); 1967 } 1968 } 1969 1970 /* Update control register with actual count. */ 1971 ctrl = cfg->msi.msi_ctrl; 1972 ctrl &= ~PCIM_MSICTRL_MME_MASK; 1973 ctrl |= (ffs(actual) - 1) << 4; 1974 cfg->msi.msi_ctrl = ctrl; 1975 pci_write_config(child, cfg->msi.msi_location + PCIR_MSI_CTRL, ctrl, 2); 1976 1977 /* Update counts of alloc'd messages. */ 1978 cfg->msi.msi_alloc = actual; 1979 cfg->msi.msi_handlers = 0; 1980 *count = actual; 1981 return (0); 1982} 1983 1984/* Release the MSI messages associated with this device. */ 1985int 1986pci_release_msi_method(device_t dev, device_t child) 1987{ 1988 struct pci_devinfo *dinfo = device_get_ivars(child); 1989 struct pcicfg_msi *msi = &dinfo->cfg.msi; 1990 struct resource_list_entry *rle; 1991 int error, i, irqs[32]; 1992 1993 /* Try MSI-X first. */ 1994 error = pci_release_msix(dev, child); 1995 if (error != ENODEV) 1996 return (error); 1997 1998 /* Do we have any messages to release? */ 1999 if (msi->msi_alloc == 0) 2000 return (ENODEV); 2001 KASSERT(msi->msi_alloc <= 32, ("more than 32 alloc'd messages")); 2002 2003 /* Make sure none of the resources are allocated. */ 2004 if (msi->msi_handlers > 0) 2005 return (EBUSY); 2006 for (i = 0; i < msi->msi_alloc; i++) { 2007 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1); 2008 KASSERT(rle != NULL, ("missing MSI resource")); 2009 if (rle->res != NULL) 2010 return (EBUSY); 2011 irqs[i] = rle->start; 2012 } 2013 2014 /* Update control register with 0 count. */ 2015 KASSERT(!(msi->msi_ctrl & PCIM_MSICTRL_MSI_ENABLE), 2016 ("%s: MSI still enabled", __func__)); 2017 msi->msi_ctrl &= ~PCIM_MSICTRL_MME_MASK; 2018 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL, 2019 msi->msi_ctrl, 2); 2020 2021 /* Release the messages. */ 2022 PCIB_RELEASE_MSI(device_get_parent(dev), child, msi->msi_alloc, irqs); 2023 for (i = 0; i < msi->msi_alloc; i++) 2024 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1); 2025 2026 /* Update alloc count. */ 2027 msi->msi_alloc = 0; 2028 msi->msi_addr = 0; 2029 msi->msi_data = 0; 2030 return (0); 2031} 2032 2033/* 2034 * Return the max supported MSI messages this device supports. 2035 * Basically, assuming the MD code can alloc messages, this function 2036 * should return the maximum value that pci_alloc_msi() can return. 2037 * Thus, it is subject to the tunables, etc. 2038 */ 2039int 2040pci_msi_count_method(device_t dev, device_t child) 2041{ 2042 struct pci_devinfo *dinfo = device_get_ivars(child); 2043 struct pcicfg_msi *msi = &dinfo->cfg.msi; 2044 2045 if (pci_do_msi && msi->msi_location != 0) 2046 return (msi->msi_msgnum); 2047 return (0); 2048} 2049 2050/* free pcicfgregs structure and all depending data structures */ 2051 2052int 2053pci_freecfg(struct pci_devinfo *dinfo) 2054{ 2055 struct devlist *devlist_head; 2056 int i; 2057 2058 devlist_head = &pci_devq; 2059 2060 if (dinfo->cfg.vpd.vpd_reg) { 2061 free(dinfo->cfg.vpd.vpd_ident, M_DEVBUF); 2062 for (i = 0; i < dinfo->cfg.vpd.vpd_rocnt; i++) 2063 free(dinfo->cfg.vpd.vpd_ros[i].value, M_DEVBUF); 2064 free(dinfo->cfg.vpd.vpd_ros, M_DEVBUF); 2065 for (i = 0; i < dinfo->cfg.vpd.vpd_wcnt; i++) 2066 free(dinfo->cfg.vpd.vpd_w[i].value, M_DEVBUF); 2067 free(dinfo->cfg.vpd.vpd_w, M_DEVBUF); 2068 } 2069 STAILQ_REMOVE(devlist_head, dinfo, pci_devinfo, pci_links); 2070 free(dinfo, M_DEVBUF); 2071 2072 /* increment the generation count */ 2073 pci_generation++; 2074 2075 /* we're losing one device */ 2076 pci_numdevs--; 2077 return (0); 2078} 2079 2080/* 2081 * PCI power manangement 2082 */ 2083int 2084pci_set_powerstate_method(device_t dev, device_t child, int state) 2085{ 2086 struct pci_devinfo *dinfo = device_get_ivars(child); 2087 pcicfgregs *cfg = &dinfo->cfg; 2088 uint16_t status; 2089 int result, oldstate, highest, delay; 2090 2091 if (cfg->pp.pp_cap == 0) 2092 return (EOPNOTSUPP); 2093 2094 /* 2095 * Optimize a no state change request away. While it would be OK to 2096 * write to the hardware in theory, some devices have shown odd 2097 * behavior when going from D3 -> D3. 2098 */ 2099 oldstate = pci_get_powerstate(child); 2100 if (oldstate == state) 2101 return (0); 2102 2103 /* 2104 * The PCI power management specification states that after a state 2105 * transition between PCI power states, system software must 2106 * guarantee a minimal delay before the function accesses the device. 2107 * Compute the worst case delay that we need to guarantee before we 2108 * access the device. Many devices will be responsive much more 2109 * quickly than this delay, but there are some that don't respond 2110 * instantly to state changes. Transitions to/from D3 state require 2111 * 10ms, while D2 requires 200us, and D0/1 require none. The delay 2112 * is done below with DELAY rather than a sleeper function because 2113 * this function can be called from contexts where we cannot sleep. 2114 */ 2115 highest = (oldstate > state) ? oldstate : state; 2116 if (highest == PCI_POWERSTATE_D3) 2117 delay = 10000; 2118 else if (highest == PCI_POWERSTATE_D2) 2119 delay = 200; 2120 else 2121 delay = 0; 2122 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2) 2123 & ~PCIM_PSTAT_DMASK; 2124 result = 0; 2125 switch (state) { 2126 case PCI_POWERSTATE_D0: 2127 status |= PCIM_PSTAT_D0; 2128 break; 2129 case PCI_POWERSTATE_D1: 2130 if ((cfg->pp.pp_cap & PCIM_PCAP_D1SUPP) == 0) 2131 return (EOPNOTSUPP); 2132 status |= PCIM_PSTAT_D1; 2133 break; 2134 case PCI_POWERSTATE_D2: 2135 if ((cfg->pp.pp_cap & PCIM_PCAP_D2SUPP) == 0) 2136 return (EOPNOTSUPP); 2137 status |= PCIM_PSTAT_D2; 2138 break; 2139 case PCI_POWERSTATE_D3: 2140 status |= PCIM_PSTAT_D3; 2141 break; 2142 default: 2143 return (EINVAL); 2144 } 2145 2146 if (bootverbose) 2147 pci_printf(cfg, "Transition from D%d to D%d\n", oldstate, 2148 state); 2149 2150 PCI_WRITE_CONFIG(dev, child, cfg->pp.pp_status, status, 2); 2151 if (delay) 2152 DELAY(delay); 2153 return (0); 2154} 2155 2156int 2157pci_get_powerstate_method(device_t dev, device_t child) 2158{ 2159 struct pci_devinfo *dinfo = device_get_ivars(child); 2160 pcicfgregs *cfg = &dinfo->cfg; 2161 uint16_t status; 2162 int result; 2163 2164 if (cfg->pp.pp_cap != 0) { 2165 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2); 2166 switch (status & PCIM_PSTAT_DMASK) { 2167 case PCIM_PSTAT_D0: 2168 result = PCI_POWERSTATE_D0; 2169 break; 2170 case PCIM_PSTAT_D1: 2171 result = PCI_POWERSTATE_D1; 2172 break; 2173 case PCIM_PSTAT_D2: 2174 result = PCI_POWERSTATE_D2; 2175 break; 2176 case PCIM_PSTAT_D3: 2177 result = PCI_POWERSTATE_D3; 2178 break; 2179 default: 2180 result = PCI_POWERSTATE_UNKNOWN; 2181 break; 2182 } 2183 } else { 2184 /* No support, device is always at D0 */ 2185 result = PCI_POWERSTATE_D0; 2186 } 2187 return (result); 2188} 2189 2190/* 2191 * Some convenience functions for PCI device drivers. 2192 */ 2193 2194static __inline void 2195pci_set_command_bit(device_t dev, device_t child, uint16_t bit) 2196{ 2197 uint16_t command; 2198 2199 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2); 2200 command |= bit; 2201 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2); 2202} 2203 2204static __inline void 2205pci_clear_command_bit(device_t dev, device_t child, uint16_t bit) 2206{ 2207 uint16_t command; 2208 2209 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2); 2210 command &= ~bit; 2211 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2); 2212} 2213 2214int 2215pci_enable_busmaster_method(device_t dev, device_t child) 2216{ 2217 pci_set_command_bit(dev, child, PCIM_CMD_BUSMASTEREN); 2218 return (0); 2219} 2220 2221int 2222pci_disable_busmaster_method(device_t dev, device_t child) 2223{ 2224 pci_clear_command_bit(dev, child, PCIM_CMD_BUSMASTEREN); 2225 return (0); 2226} 2227 2228int 2229pci_enable_io_method(device_t dev, device_t child, int space) 2230{ 2231 uint16_t bit; 2232 2233 switch(space) { 2234 case SYS_RES_IOPORT: 2235 bit = PCIM_CMD_PORTEN; 2236 break; 2237 case SYS_RES_MEMORY: 2238 bit = PCIM_CMD_MEMEN; 2239 break; 2240 default: 2241 return (EINVAL); 2242 } 2243 pci_set_command_bit(dev, child, bit); 2244 return (0); 2245} 2246 2247int 2248pci_disable_io_method(device_t dev, device_t child, int space) 2249{ 2250 uint16_t bit; 2251 2252 switch(space) { 2253 case SYS_RES_IOPORT: 2254 bit = PCIM_CMD_PORTEN; 2255 break; 2256 case SYS_RES_MEMORY: 2257 bit = PCIM_CMD_MEMEN; 2258 break; 2259 default: 2260 return (EINVAL); 2261 } 2262 pci_clear_command_bit(dev, child, bit); 2263 return (0); 2264} 2265 2266/* 2267 * New style pci driver. Parent device is either a pci-host-bridge or a 2268 * pci-pci-bridge. Both kinds are represented by instances of pcib. 2269 */ 2270 2271void 2272pci_print_verbose(struct pci_devinfo *dinfo) 2273{ 2274 2275 if (bootverbose) { 2276 pcicfgregs *cfg = &dinfo->cfg; 2277 2278 printf("found->\tvendor=0x%04x, dev=0x%04x, revid=0x%02x\n", 2279 cfg->vendor, cfg->device, cfg->revid); 2280 printf("\tdomain=%d, bus=%d, slot=%d, func=%d\n", 2281 cfg->domain, cfg->bus, cfg->slot, cfg->func); 2282 printf("\tclass=%02x-%02x-%02x, hdrtype=0x%02x, mfdev=%d\n", 2283 cfg->baseclass, cfg->subclass, cfg->progif, cfg->hdrtype, 2284 cfg->mfdev); 2285 printf("\tcmdreg=0x%04x, statreg=0x%04x, cachelnsz=%d (dwords)\n", 2286 cfg->cmdreg, cfg->statreg, cfg->cachelnsz); 2287 printf("\tlattimer=0x%02x (%d ns), mingnt=0x%02x (%d ns), maxlat=0x%02x (%d ns)\n", 2288 cfg->lattimer, cfg->lattimer * 30, cfg->mingnt, 2289 cfg->mingnt * 250, cfg->maxlat, cfg->maxlat * 250); 2290 if (cfg->intpin > 0) 2291 printf("\tintpin=%c, irq=%d\n", 2292 cfg->intpin +'a' -1, cfg->intline); 2293 if (cfg->pp.pp_cap) { 2294 uint16_t status; 2295 2296 status = pci_read_config(cfg->dev, cfg->pp.pp_status, 2); 2297 printf("\tpowerspec %d supports D0%s%s D3 current D%d\n", 2298 cfg->pp.pp_cap & PCIM_PCAP_SPEC, 2299 cfg->pp.pp_cap & PCIM_PCAP_D1SUPP ? " D1" : "", 2300 cfg->pp.pp_cap & PCIM_PCAP_D2SUPP ? " D2" : "", 2301 status & PCIM_PSTAT_DMASK); 2302 } 2303 if (cfg->msi.msi_location) { 2304 int ctrl; 2305 2306 ctrl = cfg->msi.msi_ctrl; 2307 printf("\tMSI supports %d message%s%s%s\n", 2308 cfg->msi.msi_msgnum, 2309 (cfg->msi.msi_msgnum == 1) ? "" : "s", 2310 (ctrl & PCIM_MSICTRL_64BIT) ? ", 64 bit" : "", 2311 (ctrl & PCIM_MSICTRL_VECTOR) ? ", vector masks":""); 2312 } 2313 if (cfg->msix.msix_location) { 2314 printf("\tMSI-X supports %d message%s ", 2315 cfg->msix.msix_msgnum, 2316 (cfg->msix.msix_msgnum == 1) ? "" : "s"); 2317 if (cfg->msix.msix_table_bar == cfg->msix.msix_pba_bar) 2318 printf("in map 0x%x\n", 2319 cfg->msix.msix_table_bar); 2320 else 2321 printf("in maps 0x%x and 0x%x\n", 2322 cfg->msix.msix_table_bar, 2323 cfg->msix.msix_pba_bar); 2324 } 2325 } 2326} 2327 2328static int 2329pci_porten(device_t dev) 2330{ 2331 return (pci_read_config(dev, PCIR_COMMAND, 2) & PCIM_CMD_PORTEN) != 0; 2332} 2333 2334static int 2335pci_memen(device_t dev) 2336{ 2337 return (pci_read_config(dev, PCIR_COMMAND, 2) & PCIM_CMD_MEMEN) != 0; 2338} 2339 2340static void 2341pci_read_bar(device_t dev, int reg, pci_addr_t *mapp, pci_addr_t *testvalp) 2342{ 2343 pci_addr_t map, testval; 2344 int ln2range; 2345 uint16_t cmd; 2346 2347 /* 2348 * The device ROM BAR is special. It is always a 32-bit 2349 * memory BAR. Bit 0 is special and should not be set when 2350 * sizing the BAR. 2351 */ 2352 if (reg == PCIR_BIOS) { 2353 map = pci_read_config(dev, reg, 4); 2354 pci_write_config(dev, reg, 0xfffffffe, 4); 2355 testval = pci_read_config(dev, reg, 4); 2356 pci_write_config(dev, reg, map, 4); 2357 *mapp = map; 2358 *testvalp = testval; 2359 return; 2360 } 2361 2362 map = pci_read_config(dev, reg, 4); 2363 ln2range = pci_maprange(map); 2364 if (ln2range == 64) 2365 map |= (pci_addr_t)pci_read_config(dev, reg + 4, 4) << 32; 2366 2367 /* 2368 * Disable decoding via the command register before 2369 * determining the BAR's length since we will be placing it in 2370 * a weird state. 2371 */ 2372 cmd = pci_read_config(dev, PCIR_COMMAND, 2); 2373 pci_write_config(dev, PCIR_COMMAND, 2374 cmd & ~(PCI_BAR_MEM(map) ? PCIM_CMD_MEMEN : PCIM_CMD_PORTEN), 2); 2375 2376 /* 2377 * Determine the BAR's length by writing all 1's. The bottom 2378 * log_2(size) bits of the BAR will stick as 0 when we read 2379 * the value back. 2380 */ 2381 pci_write_config(dev, reg, 0xffffffff, 4); 2382 testval = pci_read_config(dev, reg, 4); 2383 if (ln2range == 64) { 2384 pci_write_config(dev, reg + 4, 0xffffffff, 4); 2385 testval |= (pci_addr_t)pci_read_config(dev, reg + 4, 4) << 32; 2386 } 2387 2388 /* 2389 * Restore the original value of the BAR. We may have reprogrammed 2390 * the BAR of the low-level console device and when booting verbose, 2391 * we need the console device addressable. 2392 */ 2393 pci_write_config(dev, reg, map, 4); 2394 if (ln2range == 64) 2395 pci_write_config(dev, reg + 4, map >> 32, 4); 2396 pci_write_config(dev, PCIR_COMMAND, cmd, 2); 2397 2398 *mapp = map; 2399 *testvalp = testval; 2400} 2401 2402static void 2403pci_write_bar(device_t dev, int reg, pci_addr_t base) 2404{ 2405 pci_addr_t map; 2406 int ln2range; 2407 2408 map = pci_read_config(dev, reg, 4); 2409 2410 /* The device ROM BAR is always 32-bits. */ 2411 if (reg == PCIR_BIOS) 2412 return; 2413 ln2range = pci_maprange(map); 2414 pci_write_config(dev, reg, base, 4); 2415 if (ln2range == 64) 2416 pci_write_config(dev, reg + 4, base >> 32, 4); 2417} 2418 2419/* 2420 * Add a resource based on a pci map register. Return 1 if the map 2421 * register is a 32bit map register or 2 if it is a 64bit register. 2422 */ 2423static int 2424pci_add_map(device_t bus, device_t dev, int reg, struct resource_list *rl, 2425 int force, int prefetch) 2426{ 2427 pci_addr_t base, map, testval; 2428 pci_addr_t start, end, count; 2429 int barlen, basezero, maprange, mapsize, type; 2430 uint16_t cmd; 2431 struct resource *res; 2432 2433 pci_read_bar(dev, reg, &map, &testval); 2434 if (PCI_BAR_MEM(map)) { 2435 type = SYS_RES_MEMORY; 2436 if (map & PCIM_BAR_MEM_PREFETCH) 2437 prefetch = 1; 2438 } else 2439 type = SYS_RES_IOPORT; 2440 mapsize = pci_mapsize(testval); 2441 base = pci_mapbase(map); 2442#ifdef __PCI_BAR_ZERO_VALID 2443 basezero = 0; 2444#else 2445 basezero = base == 0; 2446#endif 2447 maprange = pci_maprange(map); 2448 barlen = maprange == 64 ? 2 : 1; 2449 2450 /* 2451 * For I/O registers, if bottom bit is set, and the next bit up 2452 * isn't clear, we know we have a BAR that doesn't conform to the 2453 * spec, so ignore it. Also, sanity check the size of the data 2454 * areas to the type of memory involved. Memory must be at least 2455 * 16 bytes in size, while I/O ranges must be at least 4. 2456 */ 2457 if (PCI_BAR_IO(testval) && (testval & PCIM_BAR_IO_RESERVED) != 0) 2458 return (barlen); 2459 if ((type == SYS_RES_MEMORY && mapsize < 4) || 2460 (type == SYS_RES_IOPORT && mapsize < 2)) 2461 return (barlen); 2462 2463 if (bootverbose) { 2464 printf("\tmap[%02x]: type %s, range %2d, base %#jx, size %2d", 2465 reg, pci_maptype(map), maprange, (uintmax_t)base, mapsize); 2466 if (type == SYS_RES_IOPORT && !pci_porten(dev)) 2467 printf(", port disabled\n"); 2468 else if (type == SYS_RES_MEMORY && !pci_memen(dev)) 2469 printf(", memory disabled\n"); 2470 else 2471 printf(", enabled\n"); 2472 } 2473 2474 /* 2475 * If base is 0, then we have problems if this architecture does 2476 * not allow that. It is best to ignore such entries for the 2477 * moment. These will be allocated later if the driver specifically 2478 * requests them. However, some removable busses look better when 2479 * all resources are allocated, so allow '0' to be overriden. 2480 * 2481 * Similarly treat maps whose values is the same as the test value 2482 * read back. These maps have had all f's written to them by the 2483 * BIOS in an attempt to disable the resources. 2484 */ 2485 if (!force && (basezero || map == testval)) 2486 return (barlen); 2487 if ((u_long)base != base) { 2488 device_printf(bus, 2489 "pci%d:%d:%d:%d bar %#x too many address bits", 2490 pci_get_domain(dev), pci_get_bus(dev), pci_get_slot(dev), 2491 pci_get_function(dev), reg); 2492 return (barlen); 2493 } 2494 2495 /* 2496 * This code theoretically does the right thing, but has 2497 * undesirable side effects in some cases where peripherals 2498 * respond oddly to having these bits enabled. Let the user 2499 * be able to turn them off (since pci_enable_io_modes is 1 by 2500 * default). 2501 */ 2502 if (pci_enable_io_modes) { 2503 /* Turn on resources that have been left off by a lazy BIOS */ 2504 if (type == SYS_RES_IOPORT && !pci_porten(dev)) { 2505 cmd = pci_read_config(dev, PCIR_COMMAND, 2); 2506 cmd |= PCIM_CMD_PORTEN; 2507 pci_write_config(dev, PCIR_COMMAND, cmd, 2); 2508 } 2509 if (type == SYS_RES_MEMORY && !pci_memen(dev)) { 2510 cmd = pci_read_config(dev, PCIR_COMMAND, 2); 2511 cmd |= PCIM_CMD_MEMEN; 2512 pci_write_config(dev, PCIR_COMMAND, cmd, 2); 2513 } 2514 } else { 2515 if (type == SYS_RES_IOPORT && !pci_porten(dev)) 2516 return (barlen); 2517 if (type == SYS_RES_MEMORY && !pci_memen(dev)) 2518 return (barlen); 2519 } 2520 2521 count = 1 << mapsize; 2522 if (basezero || base == pci_mapbase(testval)) { 2523 start = 0; /* Let the parent decide. */ 2524 end = ~0ULL; 2525 } else { 2526 start = base; 2527 end = base + (1 << mapsize) - 1; 2528 } 2529 resource_list_add(rl, type, reg, start, end, count); 2530 2531 /* 2532 * Try to allocate the resource for this BAR from our parent 2533 * so that this resource range is already reserved. The 2534 * driver for this device will later inherit this resource in 2535 * pci_alloc_resource(). 2536 */ 2537 res = resource_list_reserve(rl, bus, dev, type, ®, start, end, count, 2538 prefetch ? RF_PREFETCHABLE : 0); 2539 if (res == NULL) { 2540 /* 2541 * If the allocation fails, clear the BAR and delete 2542 * the resource list entry to force 2543 * pci_alloc_resource() to allocate resources from the 2544 * parent. 2545 */ 2546 resource_list_delete(rl, type, reg); 2547 start = 0; 2548 } else 2549 start = rman_get_start(res); 2550 pci_write_bar(dev, reg, start); 2551 return (barlen); 2552} 2553 2554/* 2555 * For ATA devices we need to decide early what addressing mode to use. 2556 * Legacy demands that the primary and secondary ATA ports sits on the 2557 * same addresses that old ISA hardware did. This dictates that we use 2558 * those addresses and ignore the BAR's if we cannot set PCI native 2559 * addressing mode. 2560 */ 2561static void 2562pci_ata_maps(device_t bus, device_t dev, struct resource_list *rl, int force, 2563 uint32_t prefetchmask) 2564{ 2565 struct resource *r; 2566 int rid, type, progif; 2567#if 0 2568 /* if this device supports PCI native addressing use it */ 2569 progif = pci_read_config(dev, PCIR_PROGIF, 1); 2570 if ((progif & 0x8a) == 0x8a) { 2571 if (pci_mapbase(pci_read_config(dev, PCIR_BAR(0), 4)) && 2572 pci_mapbase(pci_read_config(dev, PCIR_BAR(2), 4))) { 2573 printf("Trying ATA native PCI addressing mode\n"); 2574 pci_write_config(dev, PCIR_PROGIF, progif | 0x05, 1); 2575 } 2576 } 2577#endif 2578 progif = pci_read_config(dev, PCIR_PROGIF, 1); 2579 type = SYS_RES_IOPORT; 2580 if (progif & PCIP_STORAGE_IDE_MODEPRIM) { 2581 pci_add_map(bus, dev, PCIR_BAR(0), rl, force, 2582 prefetchmask & (1 << 0)); 2583 pci_add_map(bus, dev, PCIR_BAR(1), rl, force, 2584 prefetchmask & (1 << 1)); 2585 } else { 2586 rid = PCIR_BAR(0); 2587 resource_list_add(rl, type, rid, 0x1f0, 0x1f7, 8); 2588 r = resource_list_reserve(rl, bus, dev, type, &rid, 0x1f0, 2589 0x1f7, 8, 0); 2590 rid = PCIR_BAR(1); 2591 resource_list_add(rl, type, rid, 0x3f6, 0x3f6, 1); 2592 r = resource_list_reserve(rl, bus, dev, type, &rid, 0x3f6, 2593 0x3f6, 1, 0); 2594 } 2595 if (progif & PCIP_STORAGE_IDE_MODESEC) { 2596 pci_add_map(bus, dev, PCIR_BAR(2), rl, force, 2597 prefetchmask & (1 << 2)); 2598 pci_add_map(bus, dev, PCIR_BAR(3), rl, force, 2599 prefetchmask & (1 << 3)); 2600 } else { 2601 rid = PCIR_BAR(2); 2602 resource_list_add(rl, type, rid, 0x170, 0x177, 8); 2603 r = resource_list_reserve(rl, bus, dev, type, &rid, 0x170, 2604 0x177, 8, 0); 2605 rid = PCIR_BAR(3); 2606 resource_list_add(rl, type, rid, 0x376, 0x376, 1); 2607 r = resource_list_reserve(rl, bus, dev, type, &rid, 0x376, 2608 0x376, 1, 0); 2609 } 2610 pci_add_map(bus, dev, PCIR_BAR(4), rl, force, 2611 prefetchmask & (1 << 4)); 2612 pci_add_map(bus, dev, PCIR_BAR(5), rl, force, 2613 prefetchmask & (1 << 5)); 2614} 2615 2616static void 2617pci_assign_interrupt(device_t bus, device_t dev, int force_route) 2618{ 2619 struct pci_devinfo *dinfo = device_get_ivars(dev); 2620 pcicfgregs *cfg = &dinfo->cfg; 2621 char tunable_name[64]; 2622 int irq; 2623 2624 /* Has to have an intpin to have an interrupt. */ 2625 if (cfg->intpin == 0) 2626 return; 2627 2628 /* Let the user override the IRQ with a tunable. */ 2629 irq = PCI_INVALID_IRQ; 2630 snprintf(tunable_name, sizeof(tunable_name), 2631 "hw.pci%d.%d.%d.INT%c.irq", 2632 cfg->domain, cfg->bus, cfg->slot, cfg->intpin + 'A' - 1); 2633 if (TUNABLE_INT_FETCH(tunable_name, &irq) && (irq >= 255 || irq <= 0)) 2634 irq = PCI_INVALID_IRQ; 2635 2636 /* 2637 * If we didn't get an IRQ via the tunable, then we either use the 2638 * IRQ value in the intline register or we ask the bus to route an 2639 * interrupt for us. If force_route is true, then we only use the 2640 * value in the intline register if the bus was unable to assign an 2641 * IRQ. 2642 */ 2643 if (!PCI_INTERRUPT_VALID(irq)) { 2644 if (!PCI_INTERRUPT_VALID(cfg->intline) || force_route) 2645 irq = PCI_ASSIGN_INTERRUPT(bus, dev); 2646 if (!PCI_INTERRUPT_VALID(irq)) 2647 irq = cfg->intline; 2648 } 2649 2650 /* If after all that we don't have an IRQ, just bail. */ 2651 if (!PCI_INTERRUPT_VALID(irq)) 2652 return; 2653 2654 /* Update the config register if it changed. */ 2655 if (irq != cfg->intline) { 2656 cfg->intline = irq; 2657 pci_write_config(dev, PCIR_INTLINE, irq, 1); 2658 } 2659 2660 /* Add this IRQ as rid 0 interrupt resource. */ 2661 resource_list_add(&dinfo->resources, SYS_RES_IRQ, 0, irq, irq, 1); 2662} 2663 2664/* Perform early OHCI takeover from SMM. */ 2665static void 2666ohci_early_takeover(device_t self) 2667{ 2668 struct resource *res; 2669 uint32_t ctl; 2670 int rid; 2671 int i; 2672 2673 rid = PCIR_BAR(0); 2674 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE); 2675 if (res == NULL) 2676 return; 2677 2678 ctl = bus_read_4(res, OHCI_CONTROL); 2679 if (ctl & OHCI_IR) { 2680 if (bootverbose) 2681 printf("ohci early: " 2682 "SMM active, request owner change\n"); 2683 bus_write_4(res, OHCI_COMMAND_STATUS, OHCI_OCR); 2684 for (i = 0; (i < 100) && (ctl & OHCI_IR); i++) { 2685 DELAY(1000); 2686 ctl = bus_read_4(res, OHCI_CONTROL); 2687 } 2688 if (ctl & OHCI_IR) { 2689 if (bootverbose) 2690 printf("ohci early: " 2691 "SMM does not respond, resetting\n"); 2692 bus_write_4(res, OHCI_CONTROL, OHCI_HCFS_RESET); 2693 } 2694 /* Disable interrupts */ 2695 bus_write_4(res, OHCI_INTERRUPT_DISABLE, OHCI_ALL_INTRS); 2696 } 2697 2698 bus_release_resource(self, SYS_RES_MEMORY, rid, res); 2699} 2700 2701/* Perform early UHCI takeover from SMM. */ 2702static void 2703uhci_early_takeover(device_t self) 2704{ 2705 struct resource *res; 2706 int rid; 2707 2708 /* 2709 * Set the PIRQD enable bit and switch off all the others. We don't 2710 * want legacy support to interfere with us XXX Does this also mean 2711 * that the BIOS won't touch the keyboard anymore if it is connected 2712 * to the ports of the root hub? 2713 */ 2714 pci_write_config(self, PCI_LEGSUP, PCI_LEGSUP_USBPIRQDEN, 2); 2715 2716 /* Disable interrupts */ 2717 rid = PCI_UHCI_BASE_REG; 2718 res = bus_alloc_resource_any(self, SYS_RES_IOPORT, &rid, RF_ACTIVE); 2719 if (res != NULL) { 2720 bus_write_2(res, UHCI_INTR, 0); 2721 bus_release_resource(self, SYS_RES_IOPORT, rid, res); 2722 } 2723} 2724 2725/* Perform early EHCI takeover from SMM. */ 2726static void 2727ehci_early_takeover(device_t self) 2728{ 2729 struct resource *res; 2730 uint32_t cparams; 2731 uint32_t eec; 2732 uint8_t eecp; 2733 uint8_t bios_sem; 2734 uint8_t offs; 2735 int rid; 2736 int i; 2737 2738 rid = PCIR_BAR(0); 2739 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE); 2740 if (res == NULL) 2741 return; 2742 2743 cparams = bus_read_4(res, EHCI_HCCPARAMS); 2744 2745 /* Synchronise with the BIOS if it owns the controller. */ 2746 for (eecp = EHCI_HCC_EECP(cparams); eecp != 0; 2747 eecp = EHCI_EECP_NEXT(eec)) { 2748 eec = pci_read_config(self, eecp, 4); 2749 if (EHCI_EECP_ID(eec) != EHCI_EC_LEGSUP) { 2750 continue; 2751 } 2752 bios_sem = pci_read_config(self, eecp + 2753 EHCI_LEGSUP_BIOS_SEM, 1); 2754 if (bios_sem == 0) { 2755 continue; 2756 } 2757 if (bootverbose) 2758 printf("ehci early: " 2759 "SMM active, request owner change\n"); 2760 2761 pci_write_config(self, eecp + EHCI_LEGSUP_OS_SEM, 1, 1); 2762 2763 for (i = 0; (i < 100) && (bios_sem != 0); i++) { 2764 DELAY(1000); 2765 bios_sem = pci_read_config(self, eecp + 2766 EHCI_LEGSUP_BIOS_SEM, 1); 2767 } 2768 2769 if (bios_sem != 0) { 2770 if (bootverbose) 2771 printf("ehci early: " 2772 "SMM does not respond\n"); 2773 } 2774 /* Disable interrupts */ 2775 offs = bus_read_1(res, EHCI_CAPLENGTH); 2776 bus_write_4(res, offs + EHCI_USBINTR, 0); 2777 } 2778 bus_release_resource(self, SYS_RES_MEMORY, rid, res); 2779} 2780 2781void 2782pci_add_resources(device_t bus, device_t dev, int force, uint32_t prefetchmask) 2783{ 2784 struct pci_devinfo *dinfo = device_get_ivars(dev); 2785 pcicfgregs *cfg = &dinfo->cfg; 2786 struct resource_list *rl = &dinfo->resources; 2787 struct pci_quirk *q; 2788 int i; 2789 2790 /* ATA devices needs special map treatment */ 2791 if ((pci_get_class(dev) == PCIC_STORAGE) && 2792 (pci_get_subclass(dev) == PCIS_STORAGE_IDE) && 2793 ((pci_get_progif(dev) & PCIP_STORAGE_IDE_MASTERDEV) || 2794 (!pci_read_config(dev, PCIR_BAR(0), 4) && 2795 !pci_read_config(dev, PCIR_BAR(2), 4))) ) 2796 pci_ata_maps(bus, dev, rl, force, prefetchmask); 2797 else 2798 for (i = 0; i < cfg->nummaps;) 2799 i += pci_add_map(bus, dev, PCIR_BAR(i), rl, force, 2800 prefetchmask & (1 << i)); 2801 2802 /* 2803 * Add additional, quirked resources. 2804 */ 2805 for (q = &pci_quirks[0]; q->devid; q++) { 2806 if (q->devid == ((cfg->device << 16) | cfg->vendor) 2807 && q->type == PCI_QUIRK_MAP_REG) 2808 pci_add_map(bus, dev, q->arg1, rl, force, 0); 2809 } 2810 2811 if (cfg->intpin > 0 && PCI_INTERRUPT_VALID(cfg->intline)) { 2812#ifdef __PCI_REROUTE_INTERRUPT 2813 /* 2814 * Try to re-route interrupts. Sometimes the BIOS or 2815 * firmware may leave bogus values in these registers. 2816 * If the re-route fails, then just stick with what we 2817 * have. 2818 */ 2819 pci_assign_interrupt(bus, dev, 1); 2820#else 2821 pci_assign_interrupt(bus, dev, 0); 2822#endif 2823 } 2824 2825 if (pci_usb_takeover && pci_get_class(dev) == PCIC_SERIALBUS && 2826 pci_get_subclass(dev) == PCIS_SERIALBUS_USB) { 2827 if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_EHCI) 2828 ehci_early_takeover(dev); 2829 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_OHCI) 2830 ohci_early_takeover(dev); 2831 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_UHCI) 2832 uhci_early_takeover(dev); 2833 } 2834} 2835 2836void 2837pci_add_children(device_t dev, int domain, int busno, size_t dinfo_size) 2838{ 2839#define REG(n, w) PCIB_READ_CONFIG(pcib, busno, s, f, n, w) 2840 device_t pcib = device_get_parent(dev); 2841 struct pci_devinfo *dinfo; 2842 int maxslots; 2843 int s, f, pcifunchigh; 2844 uint8_t hdrtype; 2845 2846 KASSERT(dinfo_size >= sizeof(struct pci_devinfo), 2847 ("dinfo_size too small")); 2848 maxslots = PCIB_MAXSLOTS(pcib); 2849 for (s = 0; s <= maxslots; s++) { 2850 pcifunchigh = 0; 2851 f = 0; 2852 DELAY(1); 2853 hdrtype = REG(PCIR_HDRTYPE, 1); 2854 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE) 2855 continue; 2856 if (hdrtype & PCIM_MFDEV) 2857 pcifunchigh = PCI_FUNCMAX; 2858 for (f = 0; f <= pcifunchigh; f++) { 2859 dinfo = pci_read_device(pcib, domain, busno, s, f, 2860 dinfo_size); 2861 if (dinfo != NULL) { 2862 pci_add_child(dev, dinfo); 2863 } 2864 } 2865 } 2866#undef REG 2867} 2868 2869void 2870pci_add_child(device_t bus, struct pci_devinfo *dinfo) 2871{ 2872 dinfo->cfg.dev = device_add_child(bus, NULL, -1); 2873 device_set_ivars(dinfo->cfg.dev, dinfo); 2874 resource_list_init(&dinfo->resources); 2875 pci_cfg_save(dinfo->cfg.dev, dinfo, 0); 2876 pci_cfg_restore(dinfo->cfg.dev, dinfo); 2877 pci_print_verbose(dinfo); 2878 pci_add_resources(bus, dinfo->cfg.dev, 0, 0); 2879} 2880 2881static int 2882pci_probe(device_t dev) 2883{ 2884 2885 device_set_desc(dev, "PCI bus"); 2886 2887 /* Allow other subclasses to override this driver. */ 2888 return (BUS_PROBE_GENERIC); 2889} 2890 2891static int 2892pci_attach(device_t dev) 2893{ 2894 int busno, domain; 2895 2896 /* 2897 * Since there can be multiple independantly numbered PCI 2898 * busses on systems with multiple PCI domains, we can't use 2899 * the unit number to decide which bus we are probing. We ask 2900 * the parent pcib what our domain and bus numbers are. 2901 */ 2902 domain = pcib_get_domain(dev); 2903 busno = pcib_get_bus(dev); 2904 if (bootverbose) 2905 device_printf(dev, "domain=%d, physical bus=%d\n", 2906 domain, busno); 2907 pci_add_children(dev, domain, busno, sizeof(struct pci_devinfo)); 2908 return (bus_generic_attach(dev)); 2909} 2910 2911int 2912pci_suspend(device_t dev) 2913{ 2914 int dstate, error, i, numdevs; 2915 device_t acpi_dev, child, *devlist; 2916 struct pci_devinfo *dinfo; 2917 2918 /* 2919 * Save the PCI configuration space for each child and set the 2920 * device in the appropriate power state for this sleep state. 2921 */ 2922 acpi_dev = NULL; 2923 if (pci_do_power_resume) 2924 acpi_dev = devclass_get_device(devclass_find("acpi"), 0); 2925 if ((error = device_get_children(dev, &devlist, &numdevs)) != 0) 2926 return (error); 2927 for (i = 0; i < numdevs; i++) { 2928 child = devlist[i]; 2929 dinfo = (struct pci_devinfo *) device_get_ivars(child); 2930 pci_cfg_save(child, dinfo, 0); 2931 } 2932 2933 /* Suspend devices before potentially powering them down. */ 2934 error = bus_generic_suspend(dev); 2935 if (error) { 2936 free(devlist, M_TEMP); 2937 return (error); 2938 } 2939 2940 /* 2941 * Always set the device to D3. If ACPI suggests a different 2942 * power state, use it instead. If ACPI is not present, the 2943 * firmware is responsible for managing device power. Skip 2944 * children who aren't attached since they are powered down 2945 * separately. Only manage type 0 devices for now. 2946 */ 2947 for (i = 0; acpi_dev && i < numdevs; i++) { 2948 child = devlist[i]; 2949 dinfo = (struct pci_devinfo *) device_get_ivars(child); 2950 if (device_is_attached(child) && dinfo->cfg.hdrtype == 0) { 2951 dstate = PCI_POWERSTATE_D3; 2952 ACPI_PWR_FOR_SLEEP(acpi_dev, child, &dstate); 2953 pci_set_powerstate(child, dstate); 2954 } 2955 } 2956 free(devlist, M_TEMP); 2957 return (0); 2958} 2959 2960int 2961pci_resume(device_t dev) 2962{ 2963 int i, numdevs, error; 2964 device_t acpi_dev, child, *devlist; 2965 struct pci_devinfo *dinfo; 2966 2967 /* 2968 * Set each child to D0 and restore its PCI configuration space. 2969 */ 2970 acpi_dev = NULL; 2971 if (pci_do_power_resume) 2972 acpi_dev = devclass_get_device(devclass_find("acpi"), 0); 2973 if ((error = device_get_children(dev, &devlist, &numdevs)) != 0) 2974 return (error); 2975 for (i = 0; i < numdevs; i++) { 2976 /* 2977 * Notify ACPI we're going to D0 but ignore the result. If 2978 * ACPI is not present, the firmware is responsible for 2979 * managing device power. Only manage type 0 devices for now. 2980 */ 2981 child = devlist[i]; 2982 dinfo = (struct pci_devinfo *) device_get_ivars(child); 2983 if (acpi_dev && device_is_attached(child) && 2984 dinfo->cfg.hdrtype == 0) { 2985 ACPI_PWR_FOR_SLEEP(acpi_dev, child, NULL); 2986 pci_set_powerstate(child, PCI_POWERSTATE_D0); 2987 } 2988 2989 /* Now the device is powered up, restore its config space. */ 2990 pci_cfg_restore(child, dinfo); 2991 if (!device_is_attached(child)) 2992 pci_cfg_save(child, dinfo, 1); 2993 } 2994 free(devlist, M_TEMP); 2995 return (bus_generic_resume(dev)); 2996} 2997 2998static void 2999pci_load_vendor_data(void) 3000{ 3001 caddr_t vendordata, info; 3002 3003 if ((vendordata = preload_search_by_type("pci_vendor_data")) != NULL) { 3004 info = preload_search_info(vendordata, MODINFO_ADDR); 3005 pci_vendordata = *(char **)info; 3006 info = preload_search_info(vendordata, MODINFO_SIZE); 3007 pci_vendordata_size = *(size_t *)info; 3008 /* terminate the database */ 3009 pci_vendordata[pci_vendordata_size] = '\n'; 3010 } 3011} 3012 3013void 3014pci_driver_added(device_t dev, driver_t *driver) 3015{ 3016 int numdevs; 3017 device_t *devlist; 3018 device_t child; 3019 struct pci_devinfo *dinfo; 3020 int i; 3021 3022 if (bootverbose) 3023 device_printf(dev, "driver added\n"); 3024 DEVICE_IDENTIFY(driver, dev); 3025 if (device_get_children(dev, &devlist, &numdevs) != 0) 3026 return; 3027 for (i = 0; i < numdevs; i++) { 3028 child = devlist[i]; 3029 if (device_get_state(child) != DS_NOTPRESENT) 3030 continue; 3031 dinfo = device_get_ivars(child); 3032 pci_print_verbose(dinfo); 3033 if (bootverbose) 3034 pci_printf(&dinfo->cfg, "reprobing on driver added\n"); 3035 pci_cfg_restore(child, dinfo); 3036 if (device_probe_and_attach(child) != 0) 3037 pci_cfg_save(child, dinfo, 1); 3038 } 3039 free(devlist, M_TEMP); 3040} 3041 3042int 3043pci_setup_intr(device_t dev, device_t child, struct resource *irq, int flags, 3044 driver_filter_t *filter, driver_intr_t *intr, void *arg, void **cookiep) 3045{ 3046 struct pci_devinfo *dinfo; 3047 struct msix_table_entry *mte; 3048 struct msix_vector *mv; 3049 uint64_t addr; 3050 uint32_t data; 3051 void *cookie; 3052 int error, rid; 3053 3054 error = bus_generic_setup_intr(dev, child, irq, flags, filter, intr, 3055 arg, &cookie); 3056 if (error) 3057 return (error); 3058 3059 /* If this is not a direct child, just bail out. */ 3060 if (device_get_parent(child) != dev) { 3061 *cookiep = cookie; 3062 return(0); 3063 } 3064 3065 rid = rman_get_rid(irq); 3066 if (rid == 0) { 3067 /* Make sure that INTx is enabled */ 3068 pci_clear_command_bit(dev, child, PCIM_CMD_INTxDIS); 3069 } else { 3070 /* 3071 * Check to see if the interrupt is MSI or MSI-X. 3072 * Ask our parent to map the MSI and give 3073 * us the address and data register values. 3074 * If we fail for some reason, teardown the 3075 * interrupt handler. 3076 */ 3077 dinfo = device_get_ivars(child); 3078 if (dinfo->cfg.msi.msi_alloc > 0) { 3079 if (dinfo->cfg.msi.msi_addr == 0) { 3080 KASSERT(dinfo->cfg.msi.msi_handlers == 0, 3081 ("MSI has handlers, but vectors not mapped")); 3082 error = PCIB_MAP_MSI(device_get_parent(dev), 3083 child, rman_get_start(irq), &addr, &data); 3084 if (error) 3085 goto bad; 3086 dinfo->cfg.msi.msi_addr = addr; 3087 dinfo->cfg.msi.msi_data = data; 3088 } 3089 if (dinfo->cfg.msi.msi_handlers == 0) 3090 pci_enable_msi(child, dinfo->cfg.msi.msi_addr, 3091 dinfo->cfg.msi.msi_data); 3092 dinfo->cfg.msi.msi_handlers++; 3093 } else { 3094 KASSERT(dinfo->cfg.msix.msix_alloc > 0, 3095 ("No MSI or MSI-X interrupts allocated")); 3096 KASSERT(rid <= dinfo->cfg.msix.msix_table_len, 3097 ("MSI-X index too high")); 3098 mte = &dinfo->cfg.msix.msix_table[rid - 1]; 3099 KASSERT(mte->mte_vector != 0, ("no message vector")); 3100 mv = &dinfo->cfg.msix.msix_vectors[mte->mte_vector - 1]; 3101 KASSERT(mv->mv_irq == rman_get_start(irq), 3102 ("IRQ mismatch")); 3103 if (mv->mv_address == 0) { 3104 KASSERT(mte->mte_handlers == 0, 3105 ("MSI-X table entry has handlers, but vector not mapped")); 3106 error = PCIB_MAP_MSI(device_get_parent(dev), 3107 child, rman_get_start(irq), &addr, &data); 3108 if (error) 3109 goto bad; 3110 mv->mv_address = addr; 3111 mv->mv_data = data; 3112 } 3113 if (mte->mte_handlers == 0) { 3114 pci_enable_msix(child, rid - 1, mv->mv_address, 3115 mv->mv_data); 3116 pci_unmask_msix(child, rid - 1); 3117 } 3118 mte->mte_handlers++; 3119 } 3120 3121 /* Make sure that INTx is disabled if we are using MSI/MSIX */ 3122 pci_set_command_bit(dev, child, PCIM_CMD_INTxDIS); 3123 bad: 3124 if (error) { 3125 (void)bus_generic_teardown_intr(dev, child, irq, 3126 cookie); 3127 return (error); 3128 } 3129 } 3130 *cookiep = cookie; 3131 return (0); 3132} 3133 3134int 3135pci_teardown_intr(device_t dev, device_t child, struct resource *irq, 3136 void *cookie) 3137{ 3138 struct msix_table_entry *mte; 3139 struct resource_list_entry *rle; 3140 struct pci_devinfo *dinfo; 3141 int error, rid; 3142 3143 if (irq == NULL || !(rman_get_flags(irq) & RF_ACTIVE)) 3144 return (EINVAL); 3145 3146 /* If this isn't a direct child, just bail out */ 3147 if (device_get_parent(child) != dev) 3148 return(bus_generic_teardown_intr(dev, child, irq, cookie)); 3149 3150 rid = rman_get_rid(irq); 3151 if (rid == 0) { 3152 /* Mask INTx */ 3153 pci_set_command_bit(dev, child, PCIM_CMD_INTxDIS); 3154 } else { 3155 /* 3156 * Check to see if the interrupt is MSI or MSI-X. If so, 3157 * decrement the appropriate handlers count and mask the 3158 * MSI-X message, or disable MSI messages if the count 3159 * drops to 0. 3160 */ 3161 dinfo = device_get_ivars(child); 3162 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, rid); 3163 if (rle->res != irq) 3164 return (EINVAL); 3165 if (dinfo->cfg.msi.msi_alloc > 0) { 3166 KASSERT(rid <= dinfo->cfg.msi.msi_alloc, 3167 ("MSI-X index too high")); 3168 if (dinfo->cfg.msi.msi_handlers == 0) 3169 return (EINVAL); 3170 dinfo->cfg.msi.msi_handlers--; 3171 if (dinfo->cfg.msi.msi_handlers == 0) 3172 pci_disable_msi(child); 3173 } else { 3174 KASSERT(dinfo->cfg.msix.msix_alloc > 0, 3175 ("No MSI or MSI-X interrupts allocated")); 3176 KASSERT(rid <= dinfo->cfg.msix.msix_table_len, 3177 ("MSI-X index too high")); 3178 mte = &dinfo->cfg.msix.msix_table[rid - 1]; 3179 if (mte->mte_handlers == 0) 3180 return (EINVAL); 3181 mte->mte_handlers--; 3182 if (mte->mte_handlers == 0) 3183 pci_mask_msix(child, rid - 1); 3184 } 3185 } 3186 error = bus_generic_teardown_intr(dev, child, irq, cookie); 3187 if (rid > 0) 3188 KASSERT(error == 0, 3189 ("%s: generic teardown failed for MSI/MSI-X", __func__)); 3190 return (error); 3191} 3192 3193int 3194pci_print_child(device_t dev, device_t child) 3195{ 3196 struct pci_devinfo *dinfo; 3197 struct resource_list *rl; 3198 int retval = 0; 3199 3200 dinfo = device_get_ivars(child); 3201 rl = &dinfo->resources; 3202 3203 retval += bus_print_child_header(dev, child); 3204 3205 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 3206 retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx"); 3207 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 3208 if (device_get_flags(dev)) 3209 retval += printf(" flags %#x", device_get_flags(dev)); 3210 3211 retval += printf(" at device %d.%d", pci_get_slot(child), 3212 pci_get_function(child)); 3213 3214 retval += bus_print_child_footer(dev, child); 3215 3216 return (retval); 3217} 3218 3219static struct 3220{ 3221 int class; 3222 int subclass; 3223 char *desc; 3224} pci_nomatch_tab[] = { 3225 {PCIC_OLD, -1, "old"}, 3226 {PCIC_OLD, PCIS_OLD_NONVGA, "non-VGA display device"}, 3227 {PCIC_OLD, PCIS_OLD_VGA, "VGA-compatible display device"}, 3228 {PCIC_STORAGE, -1, "mass storage"}, 3229 {PCIC_STORAGE, PCIS_STORAGE_SCSI, "SCSI"}, 3230 {PCIC_STORAGE, PCIS_STORAGE_IDE, "ATA"}, 3231 {PCIC_STORAGE, PCIS_STORAGE_FLOPPY, "floppy disk"}, 3232 {PCIC_STORAGE, PCIS_STORAGE_IPI, "IPI"}, 3233 {PCIC_STORAGE, PCIS_STORAGE_RAID, "RAID"}, 3234 {PCIC_STORAGE, PCIS_STORAGE_ATA_ADMA, "ATA (ADMA)"}, 3235 {PCIC_STORAGE, PCIS_STORAGE_SATA, "SATA"}, 3236 {PCIC_STORAGE, PCIS_STORAGE_SAS, "SAS"}, 3237 {PCIC_NETWORK, -1, "network"}, 3238 {PCIC_NETWORK, PCIS_NETWORK_ETHERNET, "ethernet"}, 3239 {PCIC_NETWORK, PCIS_NETWORK_TOKENRING, "token ring"}, 3240 {PCIC_NETWORK, PCIS_NETWORK_FDDI, "fddi"}, 3241 {PCIC_NETWORK, PCIS_NETWORK_ATM, "ATM"}, 3242 {PCIC_NETWORK, PCIS_NETWORK_ISDN, "ISDN"}, 3243 {PCIC_DISPLAY, -1, "display"}, 3244 {PCIC_DISPLAY, PCIS_DISPLAY_VGA, "VGA"}, 3245 {PCIC_DISPLAY, PCIS_DISPLAY_XGA, "XGA"}, 3246 {PCIC_DISPLAY, PCIS_DISPLAY_3D, "3D"}, 3247 {PCIC_MULTIMEDIA, -1, "multimedia"}, 3248 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_VIDEO, "video"}, 3249 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_AUDIO, "audio"}, 3250 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_TELE, "telephony"}, 3251 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_HDA, "HDA"}, 3252 {PCIC_MEMORY, -1, "memory"}, 3253 {PCIC_MEMORY, PCIS_MEMORY_RAM, "RAM"}, 3254 {PCIC_MEMORY, PCIS_MEMORY_FLASH, "flash"}, 3255 {PCIC_BRIDGE, -1, "bridge"}, 3256 {PCIC_BRIDGE, PCIS_BRIDGE_HOST, "HOST-PCI"}, 3257 {PCIC_BRIDGE, PCIS_BRIDGE_ISA, "PCI-ISA"}, 3258 {PCIC_BRIDGE, PCIS_BRIDGE_EISA, "PCI-EISA"}, 3259 {PCIC_BRIDGE, PCIS_BRIDGE_MCA, "PCI-MCA"}, 3260 {PCIC_BRIDGE, PCIS_BRIDGE_PCI, "PCI-PCI"}, 3261 {PCIC_BRIDGE, PCIS_BRIDGE_PCMCIA, "PCI-PCMCIA"}, 3262 {PCIC_BRIDGE, PCIS_BRIDGE_NUBUS, "PCI-NuBus"}, 3263 {PCIC_BRIDGE, PCIS_BRIDGE_CARDBUS, "PCI-CardBus"}, 3264 {PCIC_BRIDGE, PCIS_BRIDGE_RACEWAY, "PCI-RACEway"}, 3265 {PCIC_SIMPLECOMM, -1, "simple comms"}, 3266 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_UART, "UART"}, /* could detect 16550 */ 3267 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_PAR, "parallel port"}, 3268 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_MULSER, "multiport serial"}, 3269 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_MODEM, "generic modem"}, 3270 {PCIC_BASEPERIPH, -1, "base peripheral"}, 3271 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PIC, "interrupt controller"}, 3272 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_DMA, "DMA controller"}, 3273 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_TIMER, "timer"}, 3274 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_RTC, "realtime clock"}, 3275 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PCIHOT, "PCI hot-plug controller"}, 3276 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_SDHC, "SD host controller"}, 3277 {PCIC_INPUTDEV, -1, "input device"}, 3278 {PCIC_INPUTDEV, PCIS_INPUTDEV_KEYBOARD, "keyboard"}, 3279 {PCIC_INPUTDEV, PCIS_INPUTDEV_DIGITIZER,"digitizer"}, 3280 {PCIC_INPUTDEV, PCIS_INPUTDEV_MOUSE, "mouse"}, 3281 {PCIC_INPUTDEV, PCIS_INPUTDEV_SCANNER, "scanner"}, 3282 {PCIC_INPUTDEV, PCIS_INPUTDEV_GAMEPORT, "gameport"}, 3283 {PCIC_DOCKING, -1, "docking station"}, 3284 {PCIC_PROCESSOR, -1, "processor"}, 3285 {PCIC_SERIALBUS, -1, "serial bus"}, 3286 {PCIC_SERIALBUS, PCIS_SERIALBUS_FW, "FireWire"}, 3287 {PCIC_SERIALBUS, PCIS_SERIALBUS_ACCESS, "AccessBus"}, 3288 {PCIC_SERIALBUS, PCIS_SERIALBUS_SSA, "SSA"}, 3289 {PCIC_SERIALBUS, PCIS_SERIALBUS_USB, "USB"}, 3290 {PCIC_SERIALBUS, PCIS_SERIALBUS_FC, "Fibre Channel"}, 3291 {PCIC_SERIALBUS, PCIS_SERIALBUS_SMBUS, "SMBus"}, 3292 {PCIC_WIRELESS, -1, "wireless controller"}, 3293 {PCIC_WIRELESS, PCIS_WIRELESS_IRDA, "iRDA"}, 3294 {PCIC_WIRELESS, PCIS_WIRELESS_IR, "IR"}, 3295 {PCIC_WIRELESS, PCIS_WIRELESS_RF, "RF"}, 3296 {PCIC_INTELLIIO, -1, "intelligent I/O controller"}, 3297 {PCIC_INTELLIIO, PCIS_INTELLIIO_I2O, "I2O"}, 3298 {PCIC_SATCOM, -1, "satellite communication"}, 3299 {PCIC_SATCOM, PCIS_SATCOM_TV, "sat TV"}, 3300 {PCIC_SATCOM, PCIS_SATCOM_AUDIO, "sat audio"}, 3301 {PCIC_SATCOM, PCIS_SATCOM_VOICE, "sat voice"}, 3302 {PCIC_SATCOM, PCIS_SATCOM_DATA, "sat data"}, 3303 {PCIC_CRYPTO, -1, "encrypt/decrypt"}, 3304 {PCIC_CRYPTO, PCIS_CRYPTO_NETCOMP, "network/computer crypto"}, 3305 {PCIC_CRYPTO, PCIS_CRYPTO_ENTERTAIN, "entertainment crypto"}, 3306 {PCIC_DASP, -1, "dasp"}, 3307 {PCIC_DASP, PCIS_DASP_DPIO, "DPIO module"}, 3308 {0, 0, NULL} 3309}; 3310 3311void 3312pci_probe_nomatch(device_t dev, device_t child) 3313{ 3314 int i; 3315 char *cp, *scp, *device; 3316 3317 /* 3318 * Look for a listing for this device in a loaded device database. 3319 */ 3320 if ((device = pci_describe_device(child)) != NULL) { 3321 device_printf(dev, "<%s>", device); 3322 free(device, M_DEVBUF); 3323 } else { 3324 /* 3325 * Scan the class/subclass descriptions for a general 3326 * description. 3327 */ 3328 cp = "unknown"; 3329 scp = NULL; 3330 for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) { 3331 if (pci_nomatch_tab[i].class == pci_get_class(child)) { 3332 if (pci_nomatch_tab[i].subclass == -1) { 3333 cp = pci_nomatch_tab[i].desc; 3334 } else if (pci_nomatch_tab[i].subclass == 3335 pci_get_subclass(child)) { 3336 scp = pci_nomatch_tab[i].desc; 3337 } 3338 } 3339 } 3340 device_printf(dev, "<%s%s%s>", 3341 cp ? cp : "", 3342 ((cp != NULL) && (scp != NULL)) ? ", " : "", 3343 scp ? scp : ""); 3344 } 3345 printf(" at device %d.%d (no driver attached)\n", 3346 pci_get_slot(child), pci_get_function(child)); 3347 pci_cfg_save(child, (struct pci_devinfo *)device_get_ivars(child), 1); 3348 return; 3349} 3350 3351/* 3352 * Parse the PCI device database, if loaded, and return a pointer to a 3353 * description of the device. 3354 * 3355 * The database is flat text formatted as follows: 3356 * 3357 * Any line not in a valid format is ignored. 3358 * Lines are terminated with newline '\n' characters. 3359 * 3360 * A VENDOR line consists of the 4 digit (hex) vendor code, a TAB, then 3361 * the vendor name. 3362 * 3363 * A DEVICE line is entered immediately below the corresponding VENDOR ID. 3364 * - devices cannot be listed without a corresponding VENDOR line. 3365 * A DEVICE line consists of a TAB, the 4 digit (hex) device code, 3366 * another TAB, then the device name. 3367 */ 3368 3369/* 3370 * Assuming (ptr) points to the beginning of a line in the database, 3371 * return the vendor or device and description of the next entry. 3372 * The value of (vendor) or (device) inappropriate for the entry type 3373 * is set to -1. Returns nonzero at the end of the database. 3374 * 3375 * Note that this is slightly unrobust in the face of corrupt data; 3376 * we attempt to safeguard against this by spamming the end of the 3377 * database with a newline when we initialise. 3378 */ 3379static int 3380pci_describe_parse_line(char **ptr, int *vendor, int *device, char **desc) 3381{ 3382 char *cp = *ptr; 3383 int left; 3384 3385 *device = -1; 3386 *vendor = -1; 3387 **desc = '\0'; 3388 for (;;) { 3389 left = pci_vendordata_size - (cp - pci_vendordata); 3390 if (left <= 0) { 3391 *ptr = cp; 3392 return(1); 3393 } 3394 3395 /* vendor entry? */ 3396 if (*cp != '\t' && 3397 sscanf(cp, "%x\t%80[^\n]", vendor, *desc) == 2) 3398 break; 3399 /* device entry? */ 3400 if (*cp == '\t' && 3401 sscanf(cp, "%x\t%80[^\n]", device, *desc) == 2) 3402 break; 3403 3404 /* skip to next line */ 3405 while (*cp != '\n' && left > 0) { 3406 cp++; 3407 left--; 3408 } 3409 if (*cp == '\n') { 3410 cp++; 3411 left--; 3412 } 3413 } 3414 /* skip to next line */ 3415 while (*cp != '\n' && left > 0) { 3416 cp++; 3417 left--; 3418 } 3419 if (*cp == '\n' && left > 0) 3420 cp++; 3421 *ptr = cp; 3422 return(0); 3423} 3424 3425static char * 3426pci_describe_device(device_t dev) 3427{ 3428 int vendor, device; 3429 char *desc, *vp, *dp, *line; 3430 3431 desc = vp = dp = NULL; 3432 3433 /* 3434 * If we have no vendor data, we can't do anything. 3435 */ 3436 if (pci_vendordata == NULL) 3437 goto out; 3438 3439 /* 3440 * Scan the vendor data looking for this device 3441 */ 3442 line = pci_vendordata; 3443 if ((vp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL) 3444 goto out; 3445 for (;;) { 3446 if (pci_describe_parse_line(&line, &vendor, &device, &vp)) 3447 goto out; 3448 if (vendor == pci_get_vendor(dev)) 3449 break; 3450 } 3451 if ((dp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL) 3452 goto out; 3453 for (;;) { 3454 if (pci_describe_parse_line(&line, &vendor, &device, &dp)) { 3455 *dp = 0; 3456 break; 3457 } 3458 if (vendor != -1) { 3459 *dp = 0; 3460 break; 3461 } 3462 if (device == pci_get_device(dev)) 3463 break; 3464 } 3465 if (dp[0] == '\0') 3466 snprintf(dp, 80, "0x%x", pci_get_device(dev)); 3467 if ((desc = malloc(strlen(vp) + strlen(dp) + 3, M_DEVBUF, M_NOWAIT)) != 3468 NULL) 3469 sprintf(desc, "%s, %s", vp, dp); 3470 out: 3471 if (vp != NULL) 3472 free(vp, M_DEVBUF); 3473 if (dp != NULL) 3474 free(dp, M_DEVBUF); 3475 return(desc); 3476} 3477 3478int 3479pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 3480{ 3481 struct pci_devinfo *dinfo; 3482 pcicfgregs *cfg; 3483 3484 dinfo = device_get_ivars(child); 3485 cfg = &dinfo->cfg; 3486 3487 switch (which) { 3488 case PCI_IVAR_ETHADDR: 3489 /* 3490 * The generic accessor doesn't deal with failure, so 3491 * we set the return value, then return an error. 3492 */ 3493 *((uint8_t **) result) = NULL; 3494 return (EINVAL); 3495 case PCI_IVAR_SUBVENDOR: 3496 *result = cfg->subvendor; 3497 break; 3498 case PCI_IVAR_SUBDEVICE: 3499 *result = cfg->subdevice; 3500 break; 3501 case PCI_IVAR_VENDOR: 3502 *result = cfg->vendor; 3503 break; 3504 case PCI_IVAR_DEVICE: 3505 *result = cfg->device; 3506 break; 3507 case PCI_IVAR_DEVID: 3508 *result = (cfg->device << 16) | cfg->vendor; 3509 break; 3510 case PCI_IVAR_CLASS: 3511 *result = cfg->baseclass; 3512 break; 3513 case PCI_IVAR_SUBCLASS: 3514 *result = cfg->subclass; 3515 break; 3516 case PCI_IVAR_PROGIF: 3517 *result = cfg->progif; 3518 break; 3519 case PCI_IVAR_REVID: 3520 *result = cfg->revid; 3521 break; 3522 case PCI_IVAR_INTPIN: 3523 *result = cfg->intpin; 3524 break; 3525 case PCI_IVAR_IRQ: 3526 *result = cfg->intline; 3527 break; 3528 case PCI_IVAR_DOMAIN: 3529 *result = cfg->domain; 3530 break; 3531 case PCI_IVAR_BUS: 3532 *result = cfg->bus; 3533 break; 3534 case PCI_IVAR_SLOT: 3535 *result = cfg->slot; 3536 break; 3537 case PCI_IVAR_FUNCTION: 3538 *result = cfg->func; 3539 break; 3540 case PCI_IVAR_CMDREG: 3541 *result = cfg->cmdreg; 3542 break; 3543 case PCI_IVAR_CACHELNSZ: 3544 *result = cfg->cachelnsz; 3545 break; 3546 case PCI_IVAR_MINGNT: 3547 *result = cfg->mingnt; 3548 break; 3549 case PCI_IVAR_MAXLAT: 3550 *result = cfg->maxlat; 3551 break; 3552 case PCI_IVAR_LATTIMER: 3553 *result = cfg->lattimer; 3554 break; 3555 default: 3556 return (ENOENT); 3557 } 3558 return (0); 3559} 3560 3561int 3562pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 3563{ 3564 struct pci_devinfo *dinfo; 3565 3566 dinfo = device_get_ivars(child); 3567 3568 switch (which) { 3569 case PCI_IVAR_INTPIN: 3570 dinfo->cfg.intpin = value; 3571 return (0); 3572 case PCI_IVAR_ETHADDR: 3573 case PCI_IVAR_SUBVENDOR: 3574 case PCI_IVAR_SUBDEVICE: 3575 case PCI_IVAR_VENDOR: 3576 case PCI_IVAR_DEVICE: 3577 case PCI_IVAR_DEVID: 3578 case PCI_IVAR_CLASS: 3579 case PCI_IVAR_SUBCLASS: 3580 case PCI_IVAR_PROGIF: 3581 case PCI_IVAR_REVID: 3582 case PCI_IVAR_IRQ: 3583 case PCI_IVAR_DOMAIN: 3584 case PCI_IVAR_BUS: 3585 case PCI_IVAR_SLOT: 3586 case PCI_IVAR_FUNCTION: 3587 return (EINVAL); /* disallow for now */ 3588 3589 default: 3590 return (ENOENT); 3591 } 3592} 3593 3594 3595#include "opt_ddb.h" 3596#ifdef DDB 3597#include <ddb/ddb.h> 3598#include <sys/cons.h> 3599 3600/* 3601 * List resources based on pci map registers, used for within ddb 3602 */ 3603 3604DB_SHOW_COMMAND(pciregs, db_pci_dump) 3605{ 3606 struct pci_devinfo *dinfo; 3607 struct devlist *devlist_head; 3608 struct pci_conf *p; 3609 const char *name; 3610 int i, error, none_count; 3611 3612 none_count = 0; 3613 /* get the head of the device queue */ 3614 devlist_head = &pci_devq; 3615 3616 /* 3617 * Go through the list of devices and print out devices 3618 */ 3619 for (error = 0, i = 0, 3620 dinfo = STAILQ_FIRST(devlist_head); 3621 (dinfo != NULL) && (error == 0) && (i < pci_numdevs) && !db_pager_quit; 3622 dinfo = STAILQ_NEXT(dinfo, pci_links), i++) { 3623 3624 /* Populate pd_name and pd_unit */ 3625 name = NULL; 3626 if (dinfo->cfg.dev) 3627 name = device_get_name(dinfo->cfg.dev); 3628 3629 p = &dinfo->conf; 3630 db_printf("%s%d@pci%d:%d:%d:%d:\tclass=0x%06x card=0x%08x " 3631 "chip=0x%08x rev=0x%02x hdr=0x%02x\n", 3632 (name && *name) ? name : "none", 3633 (name && *name) ? (int)device_get_unit(dinfo->cfg.dev) : 3634 none_count++, 3635 p->pc_sel.pc_domain, p->pc_sel.pc_bus, p->pc_sel.pc_dev, 3636 p->pc_sel.pc_func, (p->pc_class << 16) | 3637 (p->pc_subclass << 8) | p->pc_progif, 3638 (p->pc_subdevice << 16) | p->pc_subvendor, 3639 (p->pc_device << 16) | p->pc_vendor, 3640 p->pc_revid, p->pc_hdr); 3641 } 3642} 3643#endif /* DDB */ 3644 3645static struct resource * 3646pci_reserve_map(device_t dev, device_t child, int type, int *rid, 3647 u_long start, u_long end, u_long count, u_int flags) 3648{ 3649 struct pci_devinfo *dinfo = device_get_ivars(child); 3650 struct resource_list *rl = &dinfo->resources; 3651 struct resource_list_entry *rle; 3652 struct resource *res; 3653 pci_addr_t map, testval; 3654 int mapsize; 3655 3656 /* 3657 * Weed out the bogons, and figure out how large the BAR/map 3658 * is. Bars that read back 0 here are bogus and unimplemented. 3659 * Note: atapci in legacy mode are special and handled elsewhere 3660 * in the code. If you have a atapci device in legacy mode and 3661 * it fails here, that other code is broken. 3662 */ 3663 res = NULL; 3664 pci_read_bar(child, *rid, &map, &testval); 3665 3666 /* Ignore a BAR with a base of 0. */ 3667 if ((*rid == PCIR_BIOS && pci_rombase(testval) == 0) || 3668 pci_mapbase(testval) == 0) 3669 goto out; 3670 3671 if (PCI_BAR_MEM(testval) || *rid == PCIR_BIOS) { 3672 if (type != SYS_RES_MEMORY) { 3673 if (bootverbose) 3674 device_printf(dev, 3675 "child %s requested type %d for rid %#x," 3676 " but the BAR says it is an memio\n", 3677 device_get_nameunit(child), type, *rid); 3678 goto out; 3679 } 3680 } else { 3681 if (type != SYS_RES_IOPORT) { 3682 if (bootverbose) 3683 device_printf(dev, 3684 "child %s requested type %d for rid %#x," 3685 " but the BAR says it is an ioport\n", 3686 device_get_nameunit(child), type, *rid); 3687 goto out; 3688 } 3689 } 3690 3691 /* 3692 * For real BARs, we need to override the size that 3693 * the driver requests, because that's what the BAR 3694 * actually uses and we would otherwise have a 3695 * situation where we might allocate the excess to 3696 * another driver, which won't work. 3697 * 3698 * Device ROM BARs use a different mask value. 3699 */ 3700 if (*rid == PCIR_BIOS) 3701 mapsize = pci_romsize(testval); 3702 else 3703 mapsize = pci_mapsize(testval); 3704 count = 1UL << mapsize; 3705 if (RF_ALIGNMENT(flags) < mapsize) 3706 flags = (flags & ~RF_ALIGNMENT_MASK) | RF_ALIGNMENT_LOG2(mapsize); 3707 if (PCI_BAR_MEM(testval) && (testval & PCIM_BAR_MEM_PREFETCH)) 3708 flags |= RF_PREFETCHABLE; 3709 3710 /* 3711 * Allocate enough resource, and then write back the 3712 * appropriate bar for that resource. 3713 */ 3714 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child, type, rid, 3715 start, end, count, flags & ~RF_ACTIVE); 3716 if (res == NULL) { 3717 device_printf(child, 3718 "%#lx bytes of rid %#x res %d failed (%#lx, %#lx).\n", 3719 count, *rid, type, start, end); 3720 goto out; 3721 } 3722 resource_list_add(rl, type, *rid, start, end, count); 3723 rle = resource_list_find(rl, type, *rid); 3724 if (rle == NULL) 3725 panic("pci_reserve_map: unexpectedly can't find resource."); 3726 rle->res = res; 3727 rle->start = rman_get_start(res); 3728 rle->end = rman_get_end(res); 3729 rle->count = count; 3730 rle->flags = RLE_RESERVED; 3731 if (bootverbose) 3732 device_printf(child, 3733 "Lazy allocation of %#lx bytes rid %#x type %d at %#lx\n", 3734 count, *rid, type, rman_get_start(res)); 3735 map = rman_get_start(res); 3736 pci_write_bar(child, *rid, map); 3737out:; 3738 return (res); 3739} 3740 3741 3742struct resource * 3743pci_alloc_resource(device_t dev, device_t child, int type, int *rid, 3744 u_long start, u_long end, u_long count, u_int flags) 3745{ 3746 struct pci_devinfo *dinfo = device_get_ivars(child); 3747 struct resource_list *rl = &dinfo->resources; 3748 struct resource_list_entry *rle; 3749 struct resource *res; 3750 pcicfgregs *cfg = &dinfo->cfg; 3751 3752 if (device_get_parent(child) != dev) 3753 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child, 3754 type, rid, start, end, count, flags)); 3755 3756 /* 3757 * Perform lazy resource allocation 3758 */ 3759 switch (type) { 3760 case SYS_RES_IRQ: 3761 /* 3762 * Can't alloc legacy interrupt once MSI messages have 3763 * been allocated. 3764 */ 3765 if (*rid == 0 && (cfg->msi.msi_alloc > 0 || 3766 cfg->msix.msix_alloc > 0)) 3767 return (NULL); 3768 3769 /* 3770 * If the child device doesn't have an interrupt 3771 * routed and is deserving of an interrupt, try to 3772 * assign it one. 3773 */ 3774 if (*rid == 0 && !PCI_INTERRUPT_VALID(cfg->intline) && 3775 (cfg->intpin != 0)) 3776 pci_assign_interrupt(dev, child, 0); 3777 break; 3778 case SYS_RES_IOPORT: 3779 case SYS_RES_MEMORY: 3780 /* Reserve resources for this BAR if needed. */ 3781 rle = resource_list_find(rl, type, *rid); 3782 if (rle == NULL) { 3783 res = pci_reserve_map(dev, child, type, rid, start, end, 3784 count, flags); 3785 if (res == NULL) 3786 return (NULL); 3787 } 3788 } 3789 return (resource_list_alloc(rl, dev, child, type, rid, 3790 start, end, count, flags)); 3791} 3792 3793int 3794pci_activate_resource(device_t dev, device_t child, int type, int rid, 3795 struct resource *r) 3796{ 3797 int error; 3798 3799 error = bus_generic_activate_resource(dev, child, type, rid, r); 3800 if (error) 3801 return (error); 3802 3803 /* Enable decoding in the command register when activating BARs. */ 3804 if (device_get_parent(child) == dev) { 3805 /* Device ROMs need their decoding explicitly enabled. */ 3806 if (rid == PCIR_BIOS) 3807 pci_write_config(child, rid, rman_get_start(r) | 3808 PCIM_BIOS_ENABLE, 4); 3809 switch (type) { 3810 case SYS_RES_IOPORT: 3811 case SYS_RES_MEMORY: 3812 error = PCI_ENABLE_IO(dev, child, type); 3813 break; 3814 } 3815 } 3816 return (error); 3817} 3818 3819int 3820pci_deactivate_resource(device_t dev, device_t child, int type, 3821 int rid, struct resource *r) 3822{ 3823 int error; 3824 3825 error = bus_generic_deactivate_resource(dev, child, type, rid, r); 3826 if (error) 3827 return (error); 3828 3829 /* Disable decoding for device ROMs. */ 3830 if (rid == PCIR_BIOS) 3831 pci_write_config(child, rid, rman_get_start(r), 4); 3832 return (0); 3833} 3834 3835void 3836pci_delete_child(device_t dev, device_t child) 3837{ 3838 struct resource_list_entry *rle; 3839 struct resource_list *rl; 3840 struct pci_devinfo *dinfo; 3841 3842 dinfo = device_get_ivars(child); 3843 rl = &dinfo->resources; 3844 3845 if (device_is_attached(child)) 3846 device_detach(child); 3847 3848 /* Turn off access to resources we're about to free */ 3849 pci_write_config(child, PCIR_COMMAND, pci_read_config(child, 3850 PCIR_COMMAND, 2) & ~(PCIM_CMD_MEMEN | PCIM_CMD_PORTEN), 2); 3851 3852 /* Free all allocated resources */ 3853 STAILQ_FOREACH(rle, rl, link) { 3854 if (rle->res) { 3855 if (rman_get_flags(rle->res) & RF_ACTIVE || 3856 resource_list_busy(rl, rle->type, rle->rid)) { 3857 pci_printf(&dinfo->cfg, 3858 "Resource still owned, oops. " 3859 "(type=%d, rid=%d, addr=%lx)\n", 3860 rle->type, rle->rid, 3861 rman_get_start(rle->res)); 3862 bus_release_resource(child, rle->type, rle->rid, 3863 rle->res); 3864 } 3865 resource_list_unreserve(rl, dev, child, rle->type, 3866 rle->rid); 3867 } 3868 } 3869 resource_list_free(rl); 3870 3871 device_delete_child(dev, child); 3872 pci_freecfg(dinfo); 3873} 3874 3875void 3876pci_delete_resource(device_t dev, device_t child, int type, int rid) 3877{ 3878 struct pci_devinfo *dinfo; 3879 struct resource_list *rl; 3880 struct resource_list_entry *rle; 3881 3882 if (device_get_parent(child) != dev) 3883 return; 3884 3885 dinfo = device_get_ivars(child); 3886 rl = &dinfo->resources; 3887 rle = resource_list_find(rl, type, rid); 3888 if (rle == NULL) 3889 return; 3890 3891 if (rle->res) { 3892 if (rman_get_flags(rle->res) & RF_ACTIVE || 3893 resource_list_busy(rl, type, rid)) { 3894 device_printf(dev, "delete_resource: " 3895 "Resource still owned by child, oops. " 3896 "(type=%d, rid=%d, addr=%lx)\n", 3897 type, rid, rman_get_start(rle->res)); 3898 return; 3899 } 3900 3901#ifndef __PCI_BAR_ZERO_VALID 3902 /* 3903 * If this is a BAR, clear the BAR so it stops 3904 * decoding before releasing the resource. 3905 */ 3906 switch (type) { 3907 case SYS_RES_IOPORT: 3908 case SYS_RES_MEMORY: 3909 pci_write_bar(child, rid, 0); 3910 break; 3911 } 3912#endif 3913 resource_list_unreserve(rl, dev, child, type, rid); 3914 } 3915 resource_list_delete(rl, type, rid); 3916} 3917 3918struct resource_list * 3919pci_get_resource_list (device_t dev, device_t child) 3920{ 3921 struct pci_devinfo *dinfo = device_get_ivars(child); 3922 3923 return (&dinfo->resources); 3924} 3925 3926uint32_t 3927pci_read_config_method(device_t dev, device_t child, int reg, int width) 3928{ 3929 struct pci_devinfo *dinfo = device_get_ivars(child); 3930 pcicfgregs *cfg = &dinfo->cfg; 3931 3932 return (PCIB_READ_CONFIG(device_get_parent(dev), 3933 cfg->bus, cfg->slot, cfg->func, reg, width)); 3934} 3935 3936void 3937pci_write_config_method(device_t dev, device_t child, int reg, 3938 uint32_t val, int width) 3939{ 3940 struct pci_devinfo *dinfo = device_get_ivars(child); 3941 pcicfgregs *cfg = &dinfo->cfg; 3942 3943 PCIB_WRITE_CONFIG(device_get_parent(dev), 3944 cfg->bus, cfg->slot, cfg->func, reg, val, width); 3945} 3946 3947int 3948pci_child_location_str_method(device_t dev, device_t child, char *buf, 3949 size_t buflen) 3950{ 3951 3952 snprintf(buf, buflen, "slot=%d function=%d", pci_get_slot(child), 3953 pci_get_function(child)); 3954 return (0); 3955} 3956 3957int 3958pci_child_pnpinfo_str_method(device_t dev, device_t child, char *buf, 3959 size_t buflen) 3960{ 3961 struct pci_devinfo *dinfo; 3962 pcicfgregs *cfg; 3963 3964 dinfo = device_get_ivars(child); 3965 cfg = &dinfo->cfg; 3966 snprintf(buf, buflen, "vendor=0x%04x device=0x%04x subvendor=0x%04x " 3967 "subdevice=0x%04x class=0x%02x%02x%02x", cfg->vendor, cfg->device, 3968 cfg->subvendor, cfg->subdevice, cfg->baseclass, cfg->subclass, 3969 cfg->progif); 3970 return (0); 3971} 3972 3973int 3974pci_assign_interrupt_method(device_t dev, device_t child) 3975{ 3976 struct pci_devinfo *dinfo = device_get_ivars(child); 3977 pcicfgregs *cfg = &dinfo->cfg; 3978 3979 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child, 3980 cfg->intpin)); 3981} 3982 3983static int 3984pci_modevent(module_t mod, int what, void *arg) 3985{ 3986 static struct cdev *pci_cdev; 3987 3988 switch (what) { 3989 case MOD_LOAD: 3990 STAILQ_INIT(&pci_devq); 3991 pci_generation = 0; 3992 pci_cdev = make_dev(&pcicdev, 0, UID_ROOT, GID_WHEEL, 0644, 3993 "pci"); 3994 pci_load_vendor_data(); 3995 break; 3996 3997 case MOD_UNLOAD: 3998 destroy_dev(pci_cdev); 3999 break; 4000 } 4001 4002 return (0); 4003} 4004 4005void 4006pci_cfg_restore(device_t dev, struct pci_devinfo *dinfo) 4007{ 4008 int i; 4009 4010 /* 4011 * Only do header type 0 devices. Type 1 devices are bridges, 4012 * which we know need special treatment. Type 2 devices are 4013 * cardbus bridges which also require special treatment. 4014 * Other types are unknown, and we err on the side of safety 4015 * by ignoring them. 4016 */ 4017 if (dinfo->cfg.hdrtype != 0) 4018 return; 4019 4020 /* 4021 * Restore the device to full power mode. We must do this 4022 * before we restore the registers because moving from D3 to 4023 * D0 will cause the chip's BARs and some other registers to 4024 * be reset to some unknown power on reset values. Cut down 4025 * the noise on boot by doing nothing if we are already in 4026 * state D0. 4027 */ 4028 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) { 4029 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 4030 } 4031 for (i = 0; i < dinfo->cfg.nummaps; i++) 4032 pci_write_config(dev, PCIR_BAR(i), dinfo->cfg.bar[i], 4); 4033 pci_write_config(dev, PCIR_BIOS, dinfo->cfg.bios, 4); 4034 pci_write_config(dev, PCIR_COMMAND, dinfo->cfg.cmdreg, 2); 4035 pci_write_config(dev, PCIR_INTLINE, dinfo->cfg.intline, 1); 4036 pci_write_config(dev, PCIR_INTPIN, dinfo->cfg.intpin, 1); 4037 pci_write_config(dev, PCIR_MINGNT, dinfo->cfg.mingnt, 1); 4038 pci_write_config(dev, PCIR_MAXLAT, dinfo->cfg.maxlat, 1); 4039 pci_write_config(dev, PCIR_CACHELNSZ, dinfo->cfg.cachelnsz, 1); 4040 pci_write_config(dev, PCIR_LATTIMER, dinfo->cfg.lattimer, 1); 4041 pci_write_config(dev, PCIR_PROGIF, dinfo->cfg.progif, 1); 4042 pci_write_config(dev, PCIR_REVID, dinfo->cfg.revid, 1); 4043 4044 /* Restore MSI and MSI-X configurations if they are present. */ 4045 if (dinfo->cfg.msi.msi_location != 0) 4046 pci_resume_msi(dev); 4047 if (dinfo->cfg.msix.msix_location != 0) 4048 pci_resume_msix(dev); 4049} 4050 4051void 4052pci_cfg_save(device_t dev, struct pci_devinfo *dinfo, int setstate) 4053{ 4054 int i; 4055 uint32_t cls; 4056 int ps; 4057 4058 /* 4059 * Only do header type 0 devices. Type 1 devices are bridges, which 4060 * we know need special treatment. Type 2 devices are cardbus bridges 4061 * which also require special treatment. Other types are unknown, and 4062 * we err on the side of safety by ignoring them. Powering down 4063 * bridges should not be undertaken lightly. 4064 */ 4065 if (dinfo->cfg.hdrtype != 0) 4066 return; 4067 for (i = 0; i < dinfo->cfg.nummaps; i++) 4068 dinfo->cfg.bar[i] = pci_read_config(dev, PCIR_BAR(i), 4); 4069 dinfo->cfg.bios = pci_read_config(dev, PCIR_BIOS, 4); 4070 4071 /* 4072 * Some drivers apparently write to these registers w/o updating our 4073 * cached copy. No harm happens if we update the copy, so do so here 4074 * so we can restore them. The COMMAND register is modified by the 4075 * bus w/o updating the cache. This should represent the normally 4076 * writable portion of the 'defined' part of type 0 headers. In 4077 * theory we also need to save/restore the PCI capability structures 4078 * we know about, but apart from power we don't know any that are 4079 * writable. 4080 */ 4081 dinfo->cfg.subvendor = pci_read_config(dev, PCIR_SUBVEND_0, 2); 4082 dinfo->cfg.subdevice = pci_read_config(dev, PCIR_SUBDEV_0, 2); 4083 dinfo->cfg.vendor = pci_read_config(dev, PCIR_VENDOR, 2); 4084 dinfo->cfg.device = pci_read_config(dev, PCIR_DEVICE, 2); 4085 dinfo->cfg.cmdreg = pci_read_config(dev, PCIR_COMMAND, 2); 4086 dinfo->cfg.intline = pci_read_config(dev, PCIR_INTLINE, 1); 4087 dinfo->cfg.intpin = pci_read_config(dev, PCIR_INTPIN, 1); 4088 dinfo->cfg.mingnt = pci_read_config(dev, PCIR_MINGNT, 1); 4089 dinfo->cfg.maxlat = pci_read_config(dev, PCIR_MAXLAT, 1); 4090 dinfo->cfg.cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1); 4091 dinfo->cfg.lattimer = pci_read_config(dev, PCIR_LATTIMER, 1); 4092 dinfo->cfg.baseclass = pci_read_config(dev, PCIR_CLASS, 1); 4093 dinfo->cfg.subclass = pci_read_config(dev, PCIR_SUBCLASS, 1); 4094 dinfo->cfg.progif = pci_read_config(dev, PCIR_PROGIF, 1); 4095 dinfo->cfg.revid = pci_read_config(dev, PCIR_REVID, 1); 4096 4097 /* 4098 * don't set the state for display devices, base peripherals and 4099 * memory devices since bad things happen when they are powered down. 4100 * We should (a) have drivers that can easily detach and (b) use 4101 * generic drivers for these devices so that some device actually 4102 * attaches. We need to make sure that when we implement (a) we don't 4103 * power the device down on a reattach. 4104 */ 4105 cls = pci_get_class(dev); 4106 if (!setstate) 4107 return; 4108 switch (pci_do_power_nodriver) 4109 { 4110 case 0: /* NO powerdown at all */ 4111 return; 4112 case 1: /* Conservative about what to power down */ 4113 if (cls == PCIC_STORAGE) 4114 return; 4115 /*FALLTHROUGH*/ 4116 case 2: /* Agressive about what to power down */ 4117 if (cls == PCIC_DISPLAY || cls == PCIC_MEMORY || 4118 cls == PCIC_BASEPERIPH) 4119 return; 4120 /*FALLTHROUGH*/ 4121 case 3: /* Power down everything */ 4122 break; 4123 } 4124 /* 4125 * PCI spec says we can only go into D3 state from D0 state. 4126 * Transition from D[12] into D0 before going to D3 state. 4127 */ 4128 ps = pci_get_powerstate(dev); 4129 if (ps != PCI_POWERSTATE_D0 && ps != PCI_POWERSTATE_D3) 4130 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 4131 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D3) 4132 pci_set_powerstate(dev, PCI_POWERSTATE_D3); 4133} 4134