pci.c revision 214065
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 214065 2010-10-19 17:15:22Z jkim $"); 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 72static pci_addr_t pci_mapbase(uint64_t mapreg); 73static const char *pci_maptype(uint64_t mapreg); 74static int pci_mapsize(uint64_t testval); 75static int pci_maprange(uint64_t mapreg); 76static pci_addr_t pci_rombase(uint64_t mapreg); 77static int pci_romsize(uint64_t testval); 78static void pci_fixancient(pcicfgregs *cfg); 79static int pci_printf(pcicfgregs *cfg, const char *fmt, ...); 80 81static int pci_porten(device_t dev); 82static int pci_memen(device_t dev); 83static void pci_assign_interrupt(device_t bus, device_t dev, 84 int force_route); 85static int pci_add_map(device_t bus, device_t dev, int reg, 86 struct resource_list *rl, int force, int prefetch); 87static int pci_probe(device_t dev); 88static int pci_attach(device_t dev); 89static void pci_load_vendor_data(void); 90static int pci_describe_parse_line(char **ptr, int *vendor, 91 int *device, char **desc); 92static char *pci_describe_device(device_t dev); 93static int pci_modevent(module_t mod, int what, void *arg); 94static void pci_hdrtypedata(device_t pcib, int b, int s, int f, 95 pcicfgregs *cfg); 96static void pci_read_extcap(device_t pcib, pcicfgregs *cfg); 97static int pci_read_vpd_reg(device_t pcib, pcicfgregs *cfg, 98 int reg, uint32_t *data); 99#if 0 100static int pci_write_vpd_reg(device_t pcib, pcicfgregs *cfg, 101 int reg, uint32_t data); 102#endif 103static void pci_read_vpd(device_t pcib, pcicfgregs *cfg); 104static void pci_disable_msi(device_t dev); 105static void pci_enable_msi(device_t dev, uint64_t address, 106 uint16_t data); 107static void pci_enable_msix(device_t dev, u_int index, 108 uint64_t address, uint32_t data); 109static void pci_mask_msix(device_t dev, u_int index); 110static void pci_unmask_msix(device_t dev, u_int index); 111static int pci_msi_blacklisted(void); 112static void pci_resume_msi(device_t dev); 113static void pci_resume_msix(device_t dev); 114static int pci_remap_intr_method(device_t bus, device_t dev, 115 u_int irq); 116 117static device_method_t pci_methods[] = { 118 /* Device interface */ 119 DEVMETHOD(device_probe, pci_probe), 120 DEVMETHOD(device_attach, pci_attach), 121 DEVMETHOD(device_detach, bus_generic_detach), 122 DEVMETHOD(device_shutdown, bus_generic_shutdown), 123 DEVMETHOD(device_suspend, pci_suspend), 124 DEVMETHOD(device_resume, pci_resume), 125 126 /* Bus interface */ 127 DEVMETHOD(bus_print_child, pci_print_child), 128 DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch), 129 DEVMETHOD(bus_read_ivar, pci_read_ivar), 130 DEVMETHOD(bus_write_ivar, pci_write_ivar), 131 DEVMETHOD(bus_driver_added, pci_driver_added), 132 DEVMETHOD(bus_setup_intr, pci_setup_intr), 133 DEVMETHOD(bus_teardown_intr, pci_teardown_intr), 134 135 DEVMETHOD(bus_get_resource_list,pci_get_resource_list), 136 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 137 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 138 DEVMETHOD(bus_delete_resource, pci_delete_resource), 139 DEVMETHOD(bus_alloc_resource, pci_alloc_resource), 140 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 141 DEVMETHOD(bus_activate_resource, pci_activate_resource), 142 DEVMETHOD(bus_deactivate_resource, pci_deactivate_resource), 143 DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method), 144 DEVMETHOD(bus_child_location_str, pci_child_location_str_method), 145 DEVMETHOD(bus_remap_intr, pci_remap_intr_method), 146 147 /* PCI interface */ 148 DEVMETHOD(pci_read_config, pci_read_config_method), 149 DEVMETHOD(pci_write_config, pci_write_config_method), 150 DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method), 151 DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method), 152 DEVMETHOD(pci_enable_io, pci_enable_io_method), 153 DEVMETHOD(pci_disable_io, pci_disable_io_method), 154 DEVMETHOD(pci_get_vpd_ident, pci_get_vpd_ident_method), 155 DEVMETHOD(pci_get_vpd_readonly, pci_get_vpd_readonly_method), 156 DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method), 157 DEVMETHOD(pci_set_powerstate, pci_set_powerstate_method), 158 DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_method), 159 DEVMETHOD(pci_find_extcap, pci_find_extcap_method), 160 DEVMETHOD(pci_alloc_msi, pci_alloc_msi_method), 161 DEVMETHOD(pci_alloc_msix, pci_alloc_msix_method), 162 DEVMETHOD(pci_remap_msix, pci_remap_msix_method), 163 DEVMETHOD(pci_release_msi, pci_release_msi_method), 164 DEVMETHOD(pci_msi_count, pci_msi_count_method), 165 DEVMETHOD(pci_msix_count, pci_msix_count_method), 166 167 { 0, 0 } 168}; 169 170DEFINE_CLASS_0(pci, pci_driver, pci_methods, 0); 171 172static devclass_t pci_devclass; 173DRIVER_MODULE(pci, pcib, pci_driver, pci_devclass, pci_modevent, 0); 174MODULE_VERSION(pci, 1); 175 176static char *pci_vendordata; 177static size_t pci_vendordata_size; 178 179 180struct pci_quirk { 181 uint32_t devid; /* Vendor/device of the card */ 182 int type; 183#define PCI_QUIRK_MAP_REG 1 /* PCI map register in weird place */ 184#define PCI_QUIRK_DISABLE_MSI 2 /* MSI/MSI-X doesn't work */ 185 int arg1; 186 int arg2; 187}; 188 189struct pci_quirk pci_quirks[] = { 190 /* The Intel 82371AB and 82443MX has a map register at offset 0x90. */ 191 { 0x71138086, PCI_QUIRK_MAP_REG, 0x90, 0 }, 192 { 0x719b8086, PCI_QUIRK_MAP_REG, 0x90, 0 }, 193 /* As does the Serverworks OSB4 (the SMBus mapping register) */ 194 { 0x02001166, PCI_QUIRK_MAP_REG, 0x90, 0 }, 195 196 /* 197 * MSI doesn't work with the ServerWorks CNB20-HE Host Bridge 198 * or the CMIC-SL (AKA ServerWorks GC_LE). 199 */ 200 { 0x00141166, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 201 { 0x00171166, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 202 203 /* 204 * MSI doesn't work on earlier Intel chipsets including 205 * E7500, E7501, E7505, 845, 865, 875/E7210, and 855. 206 */ 207 { 0x25408086, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 208 { 0x254c8086, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 209 { 0x25508086, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 210 { 0x25608086, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 211 { 0x25708086, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 212 { 0x25788086, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 213 { 0x35808086, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 214 215 /* 216 * MSI doesn't work with devices behind the AMD 8131 HT-PCIX 217 * bridge. 218 */ 219 { 0x74501022, PCI_QUIRK_DISABLE_MSI, 0, 0 }, 220 221 { 0 } 222}; 223 224/* map register information */ 225#define PCI_MAPMEM 0x01 /* memory map */ 226#define PCI_MAPMEMP 0x02 /* prefetchable memory map */ 227#define PCI_MAPPORT 0x04 /* port map */ 228 229struct devlist pci_devq; 230uint32_t pci_generation; 231uint32_t pci_numdevs = 0; 232static int pcie_chipset, pcix_chipset; 233 234/* sysctl vars */ 235SYSCTL_NODE(_hw, OID_AUTO, pci, CTLFLAG_RD, 0, "PCI bus tuning parameters"); 236 237static int pci_enable_io_modes = 1; 238TUNABLE_INT("hw.pci.enable_io_modes", &pci_enable_io_modes); 239SYSCTL_INT(_hw_pci, OID_AUTO, enable_io_modes, CTLFLAG_RW, 240 &pci_enable_io_modes, 1, 241 "Enable I/O and memory bits in the config register. Some BIOSes do not\n\ 242enable these bits correctly. We'd like to do this all the time, but there\n\ 243are some peripherals that this causes problems with."); 244 245static int pci_do_power_nodriver = 0; 246TUNABLE_INT("hw.pci.do_power_nodriver", &pci_do_power_nodriver); 247SYSCTL_INT(_hw_pci, OID_AUTO, do_power_nodriver, CTLFLAG_RW, 248 &pci_do_power_nodriver, 0, 249 "Place a function into D3 state when no driver attaches to it. 0 means\n\ 250disable. 1 means conservatively place devices into D3 state. 2 means\n\ 251agressively place devices into D3 state. 3 means put absolutely everything\n\ 252in D3 state."); 253 254int pci_do_power_resume = 1; 255TUNABLE_INT("hw.pci.do_power_resume", &pci_do_power_resume); 256SYSCTL_INT(_hw_pci, OID_AUTO, do_power_resume, CTLFLAG_RW, 257 &pci_do_power_resume, 1, 258 "Transition from D3 -> D0 on resume."); 259 260static int pci_do_msi = 1; 261TUNABLE_INT("hw.pci.enable_msi", &pci_do_msi); 262SYSCTL_INT(_hw_pci, OID_AUTO, enable_msi, CTLFLAG_RW, &pci_do_msi, 1, 263 "Enable support for MSI interrupts"); 264 265static int pci_do_msix = 1; 266TUNABLE_INT("hw.pci.enable_msix", &pci_do_msix); 267SYSCTL_INT(_hw_pci, OID_AUTO, enable_msix, CTLFLAG_RW, &pci_do_msix, 1, 268 "Enable support for MSI-X interrupts"); 269 270static int pci_honor_msi_blacklist = 1; 271TUNABLE_INT("hw.pci.honor_msi_blacklist", &pci_honor_msi_blacklist); 272SYSCTL_INT(_hw_pci, OID_AUTO, honor_msi_blacklist, CTLFLAG_RD, 273 &pci_honor_msi_blacklist, 1, "Honor chipset blacklist for MSI"); 274 275#if defined(__i386__) || defined(__amd64__) 276static int pci_usb_takeover = 1; 277#else 278static int pci_usb_takeover = 0; 279#endif 280TUNABLE_INT("hw.pci.usb_early_takeover", &pci_usb_takeover); 281SYSCTL_INT(_hw_pci, OID_AUTO, usb_early_takeover, CTLFLAG_RD | CTLFLAG_TUN, 282 &pci_usb_takeover, 1, "Enable early takeover of USB controllers.\n\ 283Disable this if you depend on BIOS emulation of USB devices, that is\n\ 284you use USB devices (like keyboard or mouse) but do not load USB drivers"); 285 286/* Find a device_t by bus/slot/function in domain 0 */ 287 288device_t 289pci_find_bsf(uint8_t bus, uint8_t slot, uint8_t func) 290{ 291 292 return (pci_find_dbsf(0, bus, slot, func)); 293} 294 295/* Find a device_t by domain/bus/slot/function */ 296 297device_t 298pci_find_dbsf(uint32_t domain, uint8_t bus, uint8_t slot, uint8_t func) 299{ 300 struct pci_devinfo *dinfo; 301 302 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) { 303 if ((dinfo->cfg.domain == domain) && 304 (dinfo->cfg.bus == bus) && 305 (dinfo->cfg.slot == slot) && 306 (dinfo->cfg.func == func)) { 307 return (dinfo->cfg.dev); 308 } 309 } 310 311 return (NULL); 312} 313 314/* Find a device_t by vendor/device ID */ 315 316device_t 317pci_find_device(uint16_t vendor, uint16_t device) 318{ 319 struct pci_devinfo *dinfo; 320 321 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) { 322 if ((dinfo->cfg.vendor == vendor) && 323 (dinfo->cfg.device == device)) { 324 return (dinfo->cfg.dev); 325 } 326 } 327 328 return (NULL); 329} 330 331static int 332pci_printf(pcicfgregs *cfg, const char *fmt, ...) 333{ 334 va_list ap; 335 int retval; 336 337 retval = printf("pci%d:%d:%d:%d: ", cfg->domain, cfg->bus, cfg->slot, 338 cfg->func); 339 va_start(ap, fmt); 340 retval += vprintf(fmt, ap); 341 va_end(ap); 342 return (retval); 343} 344 345/* return base address of memory or port map */ 346 347static pci_addr_t 348pci_mapbase(uint64_t mapreg) 349{ 350 351 if (PCI_BAR_MEM(mapreg)) 352 return (mapreg & PCIM_BAR_MEM_BASE); 353 else 354 return (mapreg & PCIM_BAR_IO_BASE); 355} 356 357/* return map type of memory or port map */ 358 359static const char * 360pci_maptype(uint64_t mapreg) 361{ 362 363 if (PCI_BAR_IO(mapreg)) 364 return ("I/O Port"); 365 if (mapreg & PCIM_BAR_MEM_PREFETCH) 366 return ("Prefetchable Memory"); 367 return ("Memory"); 368} 369 370/* return log2 of map size decoded for memory or port map */ 371 372static int 373pci_mapsize(uint64_t testval) 374{ 375 int ln2size; 376 377 testval = pci_mapbase(testval); 378 ln2size = 0; 379 if (testval != 0) { 380 while ((testval & 1) == 0) 381 { 382 ln2size++; 383 testval >>= 1; 384 } 385 } 386 return (ln2size); 387} 388 389/* return base address of device ROM */ 390 391static pci_addr_t 392pci_rombase(uint64_t mapreg) 393{ 394 395 return (mapreg & PCIM_BIOS_ADDR_MASK); 396} 397 398/* return log2 of map size decided for device ROM */ 399 400static int 401pci_romsize(uint64_t testval) 402{ 403 int ln2size; 404 405 testval = pci_rombase(testval); 406 ln2size = 0; 407 if (testval != 0) { 408 while ((testval & 1) == 0) 409 { 410 ln2size++; 411 testval >>= 1; 412 } 413 } 414 return (ln2size); 415} 416 417/* return log2 of address range supported by map register */ 418 419static int 420pci_maprange(uint64_t mapreg) 421{ 422 int ln2range = 0; 423 424 if (PCI_BAR_IO(mapreg)) 425 ln2range = 32; 426 else 427 switch (mapreg & PCIM_BAR_MEM_TYPE) { 428 case PCIM_BAR_MEM_32: 429 ln2range = 32; 430 break; 431 case PCIM_BAR_MEM_1MB: 432 ln2range = 20; 433 break; 434 case PCIM_BAR_MEM_64: 435 ln2range = 64; 436 break; 437 } 438 return (ln2range); 439} 440 441/* adjust some values from PCI 1.0 devices to match 2.0 standards ... */ 442 443static void 444pci_fixancient(pcicfgregs *cfg) 445{ 446 if ((cfg->hdrtype & PCIM_HDRTYPE) != PCIM_HDRTYPE_NORMAL) 447 return; 448 449 /* PCI to PCI bridges use header type 1 */ 450 if (cfg->baseclass == PCIC_BRIDGE && cfg->subclass == PCIS_BRIDGE_PCI) 451 cfg->hdrtype = PCIM_HDRTYPE_BRIDGE; 452} 453 454/* extract header type specific config data */ 455 456static void 457pci_hdrtypedata(device_t pcib, int b, int s, int f, pcicfgregs *cfg) 458{ 459#define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w) 460 switch (cfg->hdrtype & PCIM_HDRTYPE) { 461 case PCIM_HDRTYPE_NORMAL: 462 cfg->subvendor = REG(PCIR_SUBVEND_0, 2); 463 cfg->subdevice = REG(PCIR_SUBDEV_0, 2); 464 cfg->nummaps = PCI_MAXMAPS_0; 465 break; 466 case PCIM_HDRTYPE_BRIDGE: 467 cfg->nummaps = PCI_MAXMAPS_1; 468 break; 469 case PCIM_HDRTYPE_CARDBUS: 470 cfg->subvendor = REG(PCIR_SUBVEND_2, 2); 471 cfg->subdevice = REG(PCIR_SUBDEV_2, 2); 472 cfg->nummaps = PCI_MAXMAPS_2; 473 break; 474 } 475#undef REG 476} 477 478/* read configuration header into pcicfgregs structure */ 479struct pci_devinfo * 480pci_read_device(device_t pcib, int d, int b, int s, int f, size_t size) 481{ 482#define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w) 483 pcicfgregs *cfg = NULL; 484 struct pci_devinfo *devlist_entry; 485 struct devlist *devlist_head; 486 487 devlist_head = &pci_devq; 488 489 devlist_entry = NULL; 490 491 if (REG(PCIR_DEVVENDOR, 4) != 0xfffffffful) { 492 devlist_entry = malloc(size, M_DEVBUF, M_WAITOK | M_ZERO); 493 if (devlist_entry == NULL) 494 return (NULL); 495 496 cfg = &devlist_entry->cfg; 497 498 cfg->domain = d; 499 cfg->bus = b; 500 cfg->slot = s; 501 cfg->func = f; 502 cfg->vendor = REG(PCIR_VENDOR, 2); 503 cfg->device = REG(PCIR_DEVICE, 2); 504 cfg->cmdreg = REG(PCIR_COMMAND, 2); 505 cfg->statreg = REG(PCIR_STATUS, 2); 506 cfg->baseclass = REG(PCIR_CLASS, 1); 507 cfg->subclass = REG(PCIR_SUBCLASS, 1); 508 cfg->progif = REG(PCIR_PROGIF, 1); 509 cfg->revid = REG(PCIR_REVID, 1); 510 cfg->hdrtype = REG(PCIR_HDRTYPE, 1); 511 cfg->cachelnsz = REG(PCIR_CACHELNSZ, 1); 512 cfg->lattimer = REG(PCIR_LATTIMER, 1); 513 cfg->intpin = REG(PCIR_INTPIN, 1); 514 cfg->intline = REG(PCIR_INTLINE, 1); 515 516 cfg->mingnt = REG(PCIR_MINGNT, 1); 517 cfg->maxlat = REG(PCIR_MAXLAT, 1); 518 519 cfg->mfdev = (cfg->hdrtype & PCIM_MFDEV) != 0; 520 cfg->hdrtype &= ~PCIM_MFDEV; 521 522 pci_fixancient(cfg); 523 pci_hdrtypedata(pcib, b, s, f, cfg); 524 525 if (REG(PCIR_STATUS, 2) & PCIM_STATUS_CAPPRESENT) 526 pci_read_extcap(pcib, cfg); 527 528 STAILQ_INSERT_TAIL(devlist_head, devlist_entry, pci_links); 529 530 devlist_entry->conf.pc_sel.pc_domain = cfg->domain; 531 devlist_entry->conf.pc_sel.pc_bus = cfg->bus; 532 devlist_entry->conf.pc_sel.pc_dev = cfg->slot; 533 devlist_entry->conf.pc_sel.pc_func = cfg->func; 534 devlist_entry->conf.pc_hdr = cfg->hdrtype; 535 536 devlist_entry->conf.pc_subvendor = cfg->subvendor; 537 devlist_entry->conf.pc_subdevice = cfg->subdevice; 538 devlist_entry->conf.pc_vendor = cfg->vendor; 539 devlist_entry->conf.pc_device = cfg->device; 540 541 devlist_entry->conf.pc_class = cfg->baseclass; 542 devlist_entry->conf.pc_subclass = cfg->subclass; 543 devlist_entry->conf.pc_progif = cfg->progif; 544 devlist_entry->conf.pc_revid = cfg->revid; 545 546 pci_numdevs++; 547 pci_generation++; 548 } 549 return (devlist_entry); 550#undef REG 551} 552 553static void 554pci_read_extcap(device_t pcib, pcicfgregs *cfg) 555{ 556#define REG(n, w) PCIB_READ_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, w) 557#define WREG(n, v, w) PCIB_WRITE_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, v, w) 558#if defined(__i386__) || defined(__amd64__) || defined(__powerpc__) 559 uint64_t addr; 560#endif 561 uint32_t val; 562 int ptr, nextptr, ptrptr; 563 564 switch (cfg->hdrtype & PCIM_HDRTYPE) { 565 case PCIM_HDRTYPE_NORMAL: 566 case PCIM_HDRTYPE_BRIDGE: 567 ptrptr = PCIR_CAP_PTR; 568 break; 569 case PCIM_HDRTYPE_CARDBUS: 570 ptrptr = PCIR_CAP_PTR_2; /* cardbus capabilities ptr */ 571 break; 572 default: 573 return; /* no extended capabilities support */ 574 } 575 nextptr = REG(ptrptr, 1); /* sanity check? */ 576 577 /* 578 * Read capability entries. 579 */ 580 while (nextptr != 0) { 581 /* Sanity check */ 582 if (nextptr > 255) { 583 printf("illegal PCI extended capability offset %d\n", 584 nextptr); 585 return; 586 } 587 /* Find the next entry */ 588 ptr = nextptr; 589 nextptr = REG(ptr + PCICAP_NEXTPTR, 1); 590 591 /* Process this entry */ 592 switch (REG(ptr + PCICAP_ID, 1)) { 593 case PCIY_PMG: /* PCI power management */ 594 if (cfg->pp.pp_cap == 0) { 595 cfg->pp.pp_cap = REG(ptr + PCIR_POWER_CAP, 2); 596 cfg->pp.pp_status = ptr + PCIR_POWER_STATUS; 597 cfg->pp.pp_pmcsr = ptr + PCIR_POWER_PMCSR; 598 if ((nextptr - ptr) > PCIR_POWER_DATA) 599 cfg->pp.pp_data = ptr + PCIR_POWER_DATA; 600 } 601 break; 602#if defined(__i386__) || defined(__amd64__) || defined(__powerpc__) 603 case PCIY_HT: /* HyperTransport */ 604 /* Determine HT-specific capability type. */ 605 val = REG(ptr + PCIR_HT_COMMAND, 2); 606 switch (val & PCIM_HTCMD_CAP_MASK) { 607 case PCIM_HTCAP_MSI_MAPPING: 608 if (!(val & PCIM_HTCMD_MSI_FIXED)) { 609 /* Sanity check the mapping window. */ 610 addr = REG(ptr + PCIR_HTMSI_ADDRESS_HI, 611 4); 612 addr <<= 32; 613 addr |= REG(ptr + PCIR_HTMSI_ADDRESS_LO, 614 4); 615 if (addr != MSI_INTEL_ADDR_BASE) 616 device_printf(pcib, 617 "HT Bridge at pci%d:%d:%d:%d has non-default MSI window 0x%llx\n", 618 cfg->domain, cfg->bus, 619 cfg->slot, cfg->func, 620 (long long)addr); 621 } else 622 addr = MSI_INTEL_ADDR_BASE; 623 624 cfg->ht.ht_msimap = ptr; 625 cfg->ht.ht_msictrl = val; 626 cfg->ht.ht_msiaddr = addr; 627 break; 628 } 629 break; 630#endif 631 case PCIY_MSI: /* PCI MSI */ 632 cfg->msi.msi_location = ptr; 633 cfg->msi.msi_ctrl = REG(ptr + PCIR_MSI_CTRL, 2); 634 cfg->msi.msi_msgnum = 1 << ((cfg->msi.msi_ctrl & 635 PCIM_MSICTRL_MMC_MASK)>>1); 636 break; 637 case PCIY_MSIX: /* PCI MSI-X */ 638 cfg->msix.msix_location = ptr; 639 cfg->msix.msix_ctrl = REG(ptr + PCIR_MSIX_CTRL, 2); 640 cfg->msix.msix_msgnum = (cfg->msix.msix_ctrl & 641 PCIM_MSIXCTRL_TABLE_SIZE) + 1; 642 val = REG(ptr + PCIR_MSIX_TABLE, 4); 643 cfg->msix.msix_table_bar = PCIR_BAR(val & 644 PCIM_MSIX_BIR_MASK); 645 cfg->msix.msix_table_offset = val & ~PCIM_MSIX_BIR_MASK; 646 val = REG(ptr + PCIR_MSIX_PBA, 4); 647 cfg->msix.msix_pba_bar = PCIR_BAR(val & 648 PCIM_MSIX_BIR_MASK); 649 cfg->msix.msix_pba_offset = val & ~PCIM_MSIX_BIR_MASK; 650 break; 651 case PCIY_VPD: /* PCI Vital Product Data */ 652 cfg->vpd.vpd_reg = ptr; 653 break; 654 case PCIY_SUBVENDOR: 655 /* Should always be true. */ 656 if ((cfg->hdrtype & PCIM_HDRTYPE) == 657 PCIM_HDRTYPE_BRIDGE) { 658 val = REG(ptr + PCIR_SUBVENDCAP_ID, 4); 659 cfg->subvendor = val & 0xffff; 660 cfg->subdevice = val >> 16; 661 } 662 break; 663 case PCIY_PCIX: /* PCI-X */ 664 /* 665 * Assume we have a PCI-X chipset if we have 666 * at least one PCI-PCI bridge with a PCI-X 667 * capability. Note that some systems with 668 * PCI-express or HT chipsets might match on 669 * this check as well. 670 */ 671 if ((cfg->hdrtype & PCIM_HDRTYPE) == 672 PCIM_HDRTYPE_BRIDGE) 673 pcix_chipset = 1; 674 break; 675 case PCIY_EXPRESS: /* PCI-express */ 676 /* 677 * Assume we have a PCI-express chipset if we have 678 * at least one PCI-express device. 679 */ 680 pcie_chipset = 1; 681 break; 682 default: 683 break; 684 } 685 } 686/* REG and WREG use carry through to next functions */ 687} 688 689/* 690 * PCI Vital Product Data 691 */ 692 693#define PCI_VPD_TIMEOUT 1000000 694 695static int 696pci_read_vpd_reg(device_t pcib, pcicfgregs *cfg, int reg, uint32_t *data) 697{ 698 int count = PCI_VPD_TIMEOUT; 699 700 KASSERT((reg & 3) == 0, ("VPD register must by 4 byte aligned")); 701 702 WREG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, reg, 2); 703 704 while ((REG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, 2) & 0x8000) != 0x8000) { 705 if (--count < 0) 706 return (ENXIO); 707 DELAY(1); /* limit looping */ 708 } 709 *data = (REG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, 4)); 710 711 return (0); 712} 713 714#if 0 715static int 716pci_write_vpd_reg(device_t pcib, pcicfgregs *cfg, int reg, uint32_t data) 717{ 718 int count = PCI_VPD_TIMEOUT; 719 720 KASSERT((reg & 3) == 0, ("VPD register must by 4 byte aligned")); 721 722 WREG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, data, 4); 723 WREG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, reg | 0x8000, 2); 724 while ((REG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, 2) & 0x8000) == 0x8000) { 725 if (--count < 0) 726 return (ENXIO); 727 DELAY(1); /* limit looping */ 728 } 729 730 return (0); 731} 732#endif 733 734#undef PCI_VPD_TIMEOUT 735 736struct vpd_readstate { 737 device_t pcib; 738 pcicfgregs *cfg; 739 uint32_t val; 740 int bytesinval; 741 int off; 742 uint8_t cksum; 743}; 744 745static int 746vpd_nextbyte(struct vpd_readstate *vrs, uint8_t *data) 747{ 748 uint32_t reg; 749 uint8_t byte; 750 751 if (vrs->bytesinval == 0) { 752 if (pci_read_vpd_reg(vrs->pcib, vrs->cfg, vrs->off, ®)) 753 return (ENXIO); 754 vrs->val = le32toh(reg); 755 vrs->off += 4; 756 byte = vrs->val & 0xff; 757 vrs->bytesinval = 3; 758 } else { 759 vrs->val = vrs->val >> 8; 760 byte = vrs->val & 0xff; 761 vrs->bytesinval--; 762 } 763 764 vrs->cksum += byte; 765 *data = byte; 766 return (0); 767} 768 769static void 770pci_read_vpd(device_t pcib, pcicfgregs *cfg) 771{ 772 struct vpd_readstate vrs; 773 int state; 774 int name; 775 int remain; 776 int i; 777 int alloc, off; /* alloc/off for RO/W arrays */ 778 int cksumvalid; 779 int dflen; 780 uint8_t byte; 781 uint8_t byte2; 782 783 /* init vpd reader */ 784 vrs.bytesinval = 0; 785 vrs.off = 0; 786 vrs.pcib = pcib; 787 vrs.cfg = cfg; 788 vrs.cksum = 0; 789 790 state = 0; 791 name = remain = i = 0; /* shut up stupid gcc */ 792 alloc = off = 0; /* shut up stupid gcc */ 793 dflen = 0; /* shut up stupid gcc */ 794 cksumvalid = -1; 795 while (state >= 0) { 796 if (vpd_nextbyte(&vrs, &byte)) { 797 state = -2; 798 break; 799 } 800#if 0 801 printf("vpd: val: %#x, off: %d, bytesinval: %d, byte: %#hhx, " \ 802 "state: %d, remain: %d, name: %#x, i: %d\n", vrs.val, 803 vrs.off, vrs.bytesinval, byte, state, remain, name, i); 804#endif 805 switch (state) { 806 case 0: /* item name */ 807 if (byte & 0x80) { 808 if (vpd_nextbyte(&vrs, &byte2)) { 809 state = -2; 810 break; 811 } 812 remain = byte2; 813 if (vpd_nextbyte(&vrs, &byte2)) { 814 state = -2; 815 break; 816 } 817 remain |= byte2 << 8; 818 if (remain > (0x7f*4 - vrs.off)) { 819 state = -1; 820 printf( 821 "pci%d:%d:%d:%d: invalid VPD data, remain %#x\n", 822 cfg->domain, cfg->bus, cfg->slot, 823 cfg->func, remain); 824 } 825 name = byte & 0x7f; 826 } else { 827 remain = byte & 0x7; 828 name = (byte >> 3) & 0xf; 829 } 830 switch (name) { 831 case 0x2: /* String */ 832 cfg->vpd.vpd_ident = malloc(remain + 1, 833 M_DEVBUF, M_WAITOK); 834 i = 0; 835 state = 1; 836 break; 837 case 0xf: /* End */ 838 state = -1; 839 break; 840 case 0x10: /* VPD-R */ 841 alloc = 8; 842 off = 0; 843 cfg->vpd.vpd_ros = malloc(alloc * 844 sizeof(*cfg->vpd.vpd_ros), M_DEVBUF, 845 M_WAITOK | M_ZERO); 846 state = 2; 847 break; 848 case 0x11: /* VPD-W */ 849 alloc = 8; 850 off = 0; 851 cfg->vpd.vpd_w = malloc(alloc * 852 sizeof(*cfg->vpd.vpd_w), M_DEVBUF, 853 M_WAITOK | M_ZERO); 854 state = 5; 855 break; 856 default: /* Invalid data, abort */ 857 state = -1; 858 break; 859 } 860 break; 861 862 case 1: /* Identifier String */ 863 cfg->vpd.vpd_ident[i++] = byte; 864 remain--; 865 if (remain == 0) { 866 cfg->vpd.vpd_ident[i] = '\0'; 867 state = 0; 868 } 869 break; 870 871 case 2: /* VPD-R Keyword Header */ 872 if (off == alloc) { 873 cfg->vpd.vpd_ros = reallocf(cfg->vpd.vpd_ros, 874 (alloc *= 2) * sizeof(*cfg->vpd.vpd_ros), 875 M_DEVBUF, M_WAITOK | M_ZERO); 876 } 877 cfg->vpd.vpd_ros[off].keyword[0] = byte; 878 if (vpd_nextbyte(&vrs, &byte2)) { 879 state = -2; 880 break; 881 } 882 cfg->vpd.vpd_ros[off].keyword[1] = byte2; 883 if (vpd_nextbyte(&vrs, &byte2)) { 884 state = -2; 885 break; 886 } 887 dflen = byte2; 888 if (dflen == 0 && 889 strncmp(cfg->vpd.vpd_ros[off].keyword, "RV", 890 2) == 0) { 891 /* 892 * if this happens, we can't trust the rest 893 * of the VPD. 894 */ 895 printf( 896 "pci%d:%d:%d:%d: bad keyword length: %d\n", 897 cfg->domain, cfg->bus, cfg->slot, 898 cfg->func, dflen); 899 cksumvalid = 0; 900 state = -1; 901 break; 902 } else if (dflen == 0) { 903 cfg->vpd.vpd_ros[off].value = malloc(1 * 904 sizeof(*cfg->vpd.vpd_ros[off].value), 905 M_DEVBUF, M_WAITOK); 906 cfg->vpd.vpd_ros[off].value[0] = '\x00'; 907 } else 908 cfg->vpd.vpd_ros[off].value = malloc( 909 (dflen + 1) * 910 sizeof(*cfg->vpd.vpd_ros[off].value), 911 M_DEVBUF, M_WAITOK); 912 remain -= 3; 913 i = 0; 914 /* keep in sync w/ state 3's transistions */ 915 if (dflen == 0 && remain == 0) 916 state = 0; 917 else if (dflen == 0) 918 state = 2; 919 else 920 state = 3; 921 break; 922 923 case 3: /* VPD-R Keyword Value */ 924 cfg->vpd.vpd_ros[off].value[i++] = byte; 925 if (strncmp(cfg->vpd.vpd_ros[off].keyword, 926 "RV", 2) == 0 && cksumvalid == -1) { 927 if (vrs.cksum == 0) 928 cksumvalid = 1; 929 else { 930 if (bootverbose) 931 printf( 932 "pci%d:%d:%d:%d: bad VPD cksum, remain %hhu\n", 933 cfg->domain, cfg->bus, 934 cfg->slot, cfg->func, 935 vrs.cksum); 936 cksumvalid = 0; 937 state = -1; 938 break; 939 } 940 } 941 dflen--; 942 remain--; 943 /* keep in sync w/ state 2's transistions */ 944 if (dflen == 0) 945 cfg->vpd.vpd_ros[off++].value[i++] = '\0'; 946 if (dflen == 0 && remain == 0) { 947 cfg->vpd.vpd_rocnt = off; 948 cfg->vpd.vpd_ros = reallocf(cfg->vpd.vpd_ros, 949 off * sizeof(*cfg->vpd.vpd_ros), 950 M_DEVBUF, M_WAITOK | M_ZERO); 951 state = 0; 952 } else if (dflen == 0) 953 state = 2; 954 break; 955 956 case 4: 957 remain--; 958 if (remain == 0) 959 state = 0; 960 break; 961 962 case 5: /* VPD-W Keyword Header */ 963 if (off == alloc) { 964 cfg->vpd.vpd_w = reallocf(cfg->vpd.vpd_w, 965 (alloc *= 2) * sizeof(*cfg->vpd.vpd_w), 966 M_DEVBUF, M_WAITOK | M_ZERO); 967 } 968 cfg->vpd.vpd_w[off].keyword[0] = byte; 969 if (vpd_nextbyte(&vrs, &byte2)) { 970 state = -2; 971 break; 972 } 973 cfg->vpd.vpd_w[off].keyword[1] = byte2; 974 if (vpd_nextbyte(&vrs, &byte2)) { 975 state = -2; 976 break; 977 } 978 cfg->vpd.vpd_w[off].len = dflen = byte2; 979 cfg->vpd.vpd_w[off].start = vrs.off - vrs.bytesinval; 980 cfg->vpd.vpd_w[off].value = malloc((dflen + 1) * 981 sizeof(*cfg->vpd.vpd_w[off].value), 982 M_DEVBUF, M_WAITOK); 983 remain -= 3; 984 i = 0; 985 /* keep in sync w/ state 6's transistions */ 986 if (dflen == 0 && remain == 0) 987 state = 0; 988 else if (dflen == 0) 989 state = 5; 990 else 991 state = 6; 992 break; 993 994 case 6: /* VPD-W Keyword Value */ 995 cfg->vpd.vpd_w[off].value[i++] = byte; 996 dflen--; 997 remain--; 998 /* keep in sync w/ state 5's transistions */ 999 if (dflen == 0) 1000 cfg->vpd.vpd_w[off++].value[i++] = '\0'; 1001 if (dflen == 0 && remain == 0) { 1002 cfg->vpd.vpd_wcnt = off; 1003 cfg->vpd.vpd_w = reallocf(cfg->vpd.vpd_w, 1004 off * sizeof(*cfg->vpd.vpd_w), 1005 M_DEVBUF, M_WAITOK | M_ZERO); 1006 state = 0; 1007 } else if (dflen == 0) 1008 state = 5; 1009 break; 1010 1011 default: 1012 printf("pci%d:%d:%d:%d: invalid state: %d\n", 1013 cfg->domain, cfg->bus, cfg->slot, cfg->func, 1014 state); 1015 state = -1; 1016 break; 1017 } 1018 } 1019 1020 if (cksumvalid == 0 || state < -1) { 1021 /* read-only data bad, clean up */ 1022 if (cfg->vpd.vpd_ros != NULL) { 1023 for (off = 0; cfg->vpd.vpd_ros[off].value; off++) 1024 free(cfg->vpd.vpd_ros[off].value, M_DEVBUF); 1025 free(cfg->vpd.vpd_ros, M_DEVBUF); 1026 cfg->vpd.vpd_ros = NULL; 1027 } 1028 } 1029 if (state < -1) { 1030 /* I/O error, clean up */ 1031 printf("pci%d:%d:%d:%d: failed to read VPD data.\n", 1032 cfg->domain, cfg->bus, cfg->slot, cfg->func); 1033 if (cfg->vpd.vpd_ident != NULL) { 1034 free(cfg->vpd.vpd_ident, M_DEVBUF); 1035 cfg->vpd.vpd_ident = NULL; 1036 } 1037 if (cfg->vpd.vpd_w != NULL) { 1038 for (off = 0; cfg->vpd.vpd_w[off].value; off++) 1039 free(cfg->vpd.vpd_w[off].value, M_DEVBUF); 1040 free(cfg->vpd.vpd_w, M_DEVBUF); 1041 cfg->vpd.vpd_w = NULL; 1042 } 1043 } 1044 cfg->vpd.vpd_cached = 1; 1045#undef REG 1046#undef WREG 1047} 1048 1049int 1050pci_get_vpd_ident_method(device_t dev, device_t child, const char **identptr) 1051{ 1052 struct pci_devinfo *dinfo = device_get_ivars(child); 1053 pcicfgregs *cfg = &dinfo->cfg; 1054 1055 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0) 1056 pci_read_vpd(device_get_parent(dev), cfg); 1057 1058 *identptr = cfg->vpd.vpd_ident; 1059 1060 if (*identptr == NULL) 1061 return (ENXIO); 1062 1063 return (0); 1064} 1065 1066int 1067pci_get_vpd_readonly_method(device_t dev, device_t child, const char *kw, 1068 const char **vptr) 1069{ 1070 struct pci_devinfo *dinfo = device_get_ivars(child); 1071 pcicfgregs *cfg = &dinfo->cfg; 1072 int i; 1073 1074 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0) 1075 pci_read_vpd(device_get_parent(dev), cfg); 1076 1077 for (i = 0; i < cfg->vpd.vpd_rocnt; i++) 1078 if (memcmp(kw, cfg->vpd.vpd_ros[i].keyword, 1079 sizeof(cfg->vpd.vpd_ros[i].keyword)) == 0) { 1080 *vptr = cfg->vpd.vpd_ros[i].value; 1081 } 1082 1083 if (i != cfg->vpd.vpd_rocnt) 1084 return (0); 1085 1086 *vptr = NULL; 1087 return (ENXIO); 1088} 1089 1090/* 1091 * Find the requested extended capability and return the offset in 1092 * configuration space via the pointer provided. The function returns 1093 * 0 on success and error code otherwise. 1094 */ 1095int 1096pci_find_extcap_method(device_t dev, device_t child, int capability, 1097 int *capreg) 1098{ 1099 struct pci_devinfo *dinfo = device_get_ivars(child); 1100 pcicfgregs *cfg = &dinfo->cfg; 1101 u_int32_t status; 1102 u_int8_t ptr; 1103 1104 /* 1105 * Check the CAP_LIST bit of the PCI status register first. 1106 */ 1107 status = pci_read_config(child, PCIR_STATUS, 2); 1108 if (!(status & PCIM_STATUS_CAPPRESENT)) 1109 return (ENXIO); 1110 1111 /* 1112 * Determine the start pointer of the capabilities list. 1113 */ 1114 switch (cfg->hdrtype & PCIM_HDRTYPE) { 1115 case PCIM_HDRTYPE_NORMAL: 1116 case PCIM_HDRTYPE_BRIDGE: 1117 ptr = PCIR_CAP_PTR; 1118 break; 1119 case PCIM_HDRTYPE_CARDBUS: 1120 ptr = PCIR_CAP_PTR_2; 1121 break; 1122 default: 1123 /* XXX: panic? */ 1124 return (ENXIO); /* no extended capabilities support */ 1125 } 1126 ptr = pci_read_config(child, ptr, 1); 1127 1128 /* 1129 * Traverse the capabilities list. 1130 */ 1131 while (ptr != 0) { 1132 if (pci_read_config(child, ptr + PCICAP_ID, 1) == capability) { 1133 if (capreg != NULL) 1134 *capreg = ptr; 1135 return (0); 1136 } 1137 ptr = pci_read_config(child, ptr + PCICAP_NEXTPTR, 1); 1138 } 1139 1140 return (ENOENT); 1141} 1142 1143/* 1144 * Support for MSI-X message interrupts. 1145 */ 1146void 1147pci_enable_msix(device_t dev, u_int index, uint64_t address, uint32_t data) 1148{ 1149 struct pci_devinfo *dinfo = device_get_ivars(dev); 1150 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1151 uint32_t offset; 1152 1153 KASSERT(msix->msix_table_len > index, ("bogus index")); 1154 offset = msix->msix_table_offset + index * 16; 1155 bus_write_4(msix->msix_table_res, offset, address & 0xffffffff); 1156 bus_write_4(msix->msix_table_res, offset + 4, address >> 32); 1157 bus_write_4(msix->msix_table_res, offset + 8, data); 1158 1159 /* Enable MSI -> HT mapping. */ 1160 pci_ht_map_msi(dev, address); 1161} 1162 1163void 1164pci_mask_msix(device_t dev, u_int index) 1165{ 1166 struct pci_devinfo *dinfo = device_get_ivars(dev); 1167 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1168 uint32_t offset, val; 1169 1170 KASSERT(msix->msix_msgnum > index, ("bogus index")); 1171 offset = msix->msix_table_offset + index * 16 + 12; 1172 val = bus_read_4(msix->msix_table_res, offset); 1173 if (!(val & PCIM_MSIX_VCTRL_MASK)) { 1174 val |= PCIM_MSIX_VCTRL_MASK; 1175 bus_write_4(msix->msix_table_res, offset, val); 1176 } 1177} 1178 1179void 1180pci_unmask_msix(device_t dev, u_int index) 1181{ 1182 struct pci_devinfo *dinfo = device_get_ivars(dev); 1183 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1184 uint32_t offset, val; 1185 1186 KASSERT(msix->msix_table_len > index, ("bogus index")); 1187 offset = msix->msix_table_offset + index * 16 + 12; 1188 val = bus_read_4(msix->msix_table_res, offset); 1189 if (val & PCIM_MSIX_VCTRL_MASK) { 1190 val &= ~PCIM_MSIX_VCTRL_MASK; 1191 bus_write_4(msix->msix_table_res, offset, val); 1192 } 1193} 1194 1195int 1196pci_pending_msix(device_t dev, u_int index) 1197{ 1198 struct pci_devinfo *dinfo = device_get_ivars(dev); 1199 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1200 uint32_t offset, bit; 1201 1202 KASSERT(msix->msix_table_len > index, ("bogus index")); 1203 offset = msix->msix_pba_offset + (index / 32) * 4; 1204 bit = 1 << index % 32; 1205 return (bus_read_4(msix->msix_pba_res, offset) & bit); 1206} 1207 1208/* 1209 * Restore MSI-X registers and table during resume. If MSI-X is 1210 * enabled then walk the virtual table to restore the actual MSI-X 1211 * table. 1212 */ 1213static void 1214pci_resume_msix(device_t dev) 1215{ 1216 struct pci_devinfo *dinfo = device_get_ivars(dev); 1217 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1218 struct msix_table_entry *mte; 1219 struct msix_vector *mv; 1220 int i; 1221 1222 if (msix->msix_alloc > 0) { 1223 /* First, mask all vectors. */ 1224 for (i = 0; i < msix->msix_msgnum; i++) 1225 pci_mask_msix(dev, i); 1226 1227 /* Second, program any messages with at least one handler. */ 1228 for (i = 0; i < msix->msix_table_len; i++) { 1229 mte = &msix->msix_table[i]; 1230 if (mte->mte_vector == 0 || mte->mte_handlers == 0) 1231 continue; 1232 mv = &msix->msix_vectors[mte->mte_vector - 1]; 1233 pci_enable_msix(dev, i, mv->mv_address, mv->mv_data); 1234 pci_unmask_msix(dev, i); 1235 } 1236 } 1237 pci_write_config(dev, msix->msix_location + PCIR_MSIX_CTRL, 1238 msix->msix_ctrl, 2); 1239} 1240 1241/* 1242 * Attempt to allocate *count MSI-X messages. The actual number allocated is 1243 * returned in *count. After this function returns, each message will be 1244 * available to the driver as SYS_RES_IRQ resources starting at rid 1. 1245 */ 1246int 1247pci_alloc_msix_method(device_t dev, device_t child, int *count) 1248{ 1249 struct pci_devinfo *dinfo = device_get_ivars(child); 1250 pcicfgregs *cfg = &dinfo->cfg; 1251 struct resource_list_entry *rle; 1252 int actual, error, i, irq, max; 1253 1254 /* Don't let count == 0 get us into trouble. */ 1255 if (*count == 0) 1256 return (EINVAL); 1257 1258 /* If rid 0 is allocated, then fail. */ 1259 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0); 1260 if (rle != NULL && rle->res != NULL) 1261 return (ENXIO); 1262 1263 /* Already have allocated messages? */ 1264 if (cfg->msi.msi_alloc != 0 || cfg->msix.msix_alloc != 0) 1265 return (ENXIO); 1266 1267 /* If MSI is blacklisted for this system, fail. */ 1268 if (pci_msi_blacklisted()) 1269 return (ENXIO); 1270 1271 /* MSI-X capability present? */ 1272 if (cfg->msix.msix_location == 0 || !pci_do_msix) 1273 return (ENODEV); 1274 1275 /* Make sure the appropriate BARs are mapped. */ 1276 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY, 1277 cfg->msix.msix_table_bar); 1278 if (rle == NULL || rle->res == NULL || 1279 !(rman_get_flags(rle->res) & RF_ACTIVE)) 1280 return (ENXIO); 1281 cfg->msix.msix_table_res = rle->res; 1282 if (cfg->msix.msix_pba_bar != cfg->msix.msix_table_bar) { 1283 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY, 1284 cfg->msix.msix_pba_bar); 1285 if (rle == NULL || rle->res == NULL || 1286 !(rman_get_flags(rle->res) & RF_ACTIVE)) 1287 return (ENXIO); 1288 } 1289 cfg->msix.msix_pba_res = rle->res; 1290 1291 if (bootverbose) 1292 device_printf(child, 1293 "attempting to allocate %d MSI-X vectors (%d supported)\n", 1294 *count, cfg->msix.msix_msgnum); 1295 max = min(*count, cfg->msix.msix_msgnum); 1296 for (i = 0; i < max; i++) { 1297 /* Allocate a message. */ 1298 error = PCIB_ALLOC_MSIX(device_get_parent(dev), child, &irq); 1299 if (error) 1300 break; 1301 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, irq, 1302 irq, 1); 1303 } 1304 actual = i; 1305 1306 if (bootverbose) { 1307 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 1); 1308 if (actual == 1) 1309 device_printf(child, "using IRQ %lu for MSI-X\n", 1310 rle->start); 1311 else { 1312 int run; 1313 1314 /* 1315 * Be fancy and try to print contiguous runs of 1316 * IRQ values as ranges. 'irq' is the previous IRQ. 1317 * 'run' is true if we are in a range. 1318 */ 1319 device_printf(child, "using IRQs %lu", rle->start); 1320 irq = rle->start; 1321 run = 0; 1322 for (i = 1; i < actual; i++) { 1323 rle = resource_list_find(&dinfo->resources, 1324 SYS_RES_IRQ, i + 1); 1325 1326 /* Still in a run? */ 1327 if (rle->start == irq + 1) { 1328 run = 1; 1329 irq++; 1330 continue; 1331 } 1332 1333 /* Finish previous range. */ 1334 if (run) { 1335 printf("-%d", irq); 1336 run = 0; 1337 } 1338 1339 /* Start new range. */ 1340 printf(",%lu", rle->start); 1341 irq = rle->start; 1342 } 1343 1344 /* Unfinished range? */ 1345 if (run) 1346 printf("-%d", irq); 1347 printf(" for MSI-X\n"); 1348 } 1349 } 1350 1351 /* Mask all vectors. */ 1352 for (i = 0; i < cfg->msix.msix_msgnum; i++) 1353 pci_mask_msix(child, i); 1354 1355 /* Allocate and initialize vector data and virtual table. */ 1356 cfg->msix.msix_vectors = malloc(sizeof(struct msix_vector) * actual, 1357 M_DEVBUF, M_WAITOK | M_ZERO); 1358 cfg->msix.msix_table = malloc(sizeof(struct msix_table_entry) * actual, 1359 M_DEVBUF, M_WAITOK | M_ZERO); 1360 for (i = 0; i < actual; i++) { 1361 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1); 1362 cfg->msix.msix_vectors[i].mv_irq = rle->start; 1363 cfg->msix.msix_table[i].mte_vector = i + 1; 1364 } 1365 1366 /* Update control register to enable MSI-X. */ 1367 cfg->msix.msix_ctrl |= PCIM_MSIXCTRL_MSIX_ENABLE; 1368 pci_write_config(child, cfg->msix.msix_location + PCIR_MSIX_CTRL, 1369 cfg->msix.msix_ctrl, 2); 1370 1371 /* Update counts of alloc'd messages. */ 1372 cfg->msix.msix_alloc = actual; 1373 cfg->msix.msix_table_len = actual; 1374 *count = actual; 1375 return (0); 1376} 1377 1378/* 1379 * By default, pci_alloc_msix() will assign the allocated IRQ 1380 * resources consecutively to the first N messages in the MSI-X table. 1381 * However, device drivers may want to use different layouts if they 1382 * either receive fewer messages than they asked for, or they wish to 1383 * populate the MSI-X table sparsely. This method allows the driver 1384 * to specify what layout it wants. It must be called after a 1385 * successful pci_alloc_msix() but before any of the associated 1386 * SYS_RES_IRQ resources are allocated via bus_alloc_resource(). 1387 * 1388 * The 'vectors' array contains 'count' message vectors. The array 1389 * maps directly to the MSI-X table in that index 0 in the array 1390 * specifies the vector for the first message in the MSI-X table, etc. 1391 * The vector value in each array index can either be 0 to indicate 1392 * that no vector should be assigned to a message slot, or it can be a 1393 * number from 1 to N (where N is the count returned from a 1394 * succcessful call to pci_alloc_msix()) to indicate which message 1395 * vector (IRQ) to be used for the corresponding message. 1396 * 1397 * On successful return, each message with a non-zero vector will have 1398 * an associated SYS_RES_IRQ whose rid is equal to the array index + 1399 * 1. Additionally, if any of the IRQs allocated via the previous 1400 * call to pci_alloc_msix() are not used in the mapping, those IRQs 1401 * will be freed back to the system automatically. 1402 * 1403 * For example, suppose a driver has a MSI-X table with 6 messages and 1404 * asks for 6 messages, but pci_alloc_msix() only returns a count of 1405 * 3. Call the three vectors allocated by pci_alloc_msix() A, B, and 1406 * C. After the call to pci_alloc_msix(), the device will be setup to 1407 * have an MSI-X table of ABC--- (where - means no vector assigned). 1408 * If the driver ten passes a vector array of { 1, 0, 1, 2, 0, 2 }, 1409 * then the MSI-X table will look like A-AB-B, and the 'C' vector will 1410 * be freed back to the system. This device will also have valid 1411 * SYS_RES_IRQ rids of 1, 3, 4, and 6. 1412 * 1413 * In any case, the SYS_RES_IRQ rid X will always map to the message 1414 * at MSI-X table index X - 1 and will only be valid if a vector is 1415 * assigned to that table entry. 1416 */ 1417int 1418pci_remap_msix_method(device_t dev, device_t child, int count, 1419 const u_int *vectors) 1420{ 1421 struct pci_devinfo *dinfo = device_get_ivars(child); 1422 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1423 struct resource_list_entry *rle; 1424 int i, irq, j, *used; 1425 1426 /* 1427 * Have to have at least one message in the table but the 1428 * table can't be bigger than the actual MSI-X table in the 1429 * device. 1430 */ 1431 if (count == 0 || count > msix->msix_msgnum) 1432 return (EINVAL); 1433 1434 /* Sanity check the vectors. */ 1435 for (i = 0; i < count; i++) 1436 if (vectors[i] > msix->msix_alloc) 1437 return (EINVAL); 1438 1439 /* 1440 * Make sure there aren't any holes in the vectors to be used. 1441 * It's a big pain to support it, and it doesn't really make 1442 * sense anyway. Also, at least one vector must be used. 1443 */ 1444 used = malloc(sizeof(int) * msix->msix_alloc, M_DEVBUF, M_WAITOK | 1445 M_ZERO); 1446 for (i = 0; i < count; i++) 1447 if (vectors[i] != 0) 1448 used[vectors[i] - 1] = 1; 1449 for (i = 0; i < msix->msix_alloc - 1; i++) 1450 if (used[i] == 0 && used[i + 1] == 1) { 1451 free(used, M_DEVBUF); 1452 return (EINVAL); 1453 } 1454 if (used[0] != 1) { 1455 free(used, M_DEVBUF); 1456 return (EINVAL); 1457 } 1458 1459 /* Make sure none of the resources are allocated. */ 1460 for (i = 0; i < msix->msix_table_len; i++) { 1461 if (msix->msix_table[i].mte_vector == 0) 1462 continue; 1463 if (msix->msix_table[i].mte_handlers > 0) 1464 return (EBUSY); 1465 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1); 1466 KASSERT(rle != NULL, ("missing resource")); 1467 if (rle->res != NULL) 1468 return (EBUSY); 1469 } 1470 1471 /* Free the existing resource list entries. */ 1472 for (i = 0; i < msix->msix_table_len; i++) { 1473 if (msix->msix_table[i].mte_vector == 0) 1474 continue; 1475 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1); 1476 } 1477 1478 /* 1479 * Build the new virtual table keeping track of which vectors are 1480 * used. 1481 */ 1482 free(msix->msix_table, M_DEVBUF); 1483 msix->msix_table = malloc(sizeof(struct msix_table_entry) * count, 1484 M_DEVBUF, M_WAITOK | M_ZERO); 1485 for (i = 0; i < count; i++) 1486 msix->msix_table[i].mte_vector = vectors[i]; 1487 msix->msix_table_len = count; 1488 1489 /* Free any unused IRQs and resize the vectors array if necessary. */ 1490 j = msix->msix_alloc - 1; 1491 if (used[j] == 0) { 1492 struct msix_vector *vec; 1493 1494 while (used[j] == 0) { 1495 PCIB_RELEASE_MSIX(device_get_parent(dev), child, 1496 msix->msix_vectors[j].mv_irq); 1497 j--; 1498 } 1499 vec = malloc(sizeof(struct msix_vector) * (j + 1), M_DEVBUF, 1500 M_WAITOK); 1501 bcopy(msix->msix_vectors, vec, sizeof(struct msix_vector) * 1502 (j + 1)); 1503 free(msix->msix_vectors, M_DEVBUF); 1504 msix->msix_vectors = vec; 1505 msix->msix_alloc = j + 1; 1506 } 1507 free(used, M_DEVBUF); 1508 1509 /* Map the IRQs onto the rids. */ 1510 for (i = 0; i < count; i++) { 1511 if (vectors[i] == 0) 1512 continue; 1513 irq = msix->msix_vectors[vectors[i]].mv_irq; 1514 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, irq, 1515 irq, 1); 1516 } 1517 1518 if (bootverbose) { 1519 device_printf(child, "Remapped MSI-X IRQs as: "); 1520 for (i = 0; i < count; i++) { 1521 if (i != 0) 1522 printf(", "); 1523 if (vectors[i] == 0) 1524 printf("---"); 1525 else 1526 printf("%d", 1527 msix->msix_vectors[vectors[i]].mv_irq); 1528 } 1529 printf("\n"); 1530 } 1531 1532 return (0); 1533} 1534 1535static int 1536pci_release_msix(device_t dev, device_t child) 1537{ 1538 struct pci_devinfo *dinfo = device_get_ivars(child); 1539 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1540 struct resource_list_entry *rle; 1541 int i; 1542 1543 /* Do we have any messages to release? */ 1544 if (msix->msix_alloc == 0) 1545 return (ENODEV); 1546 1547 /* Make sure none of the resources are allocated. */ 1548 for (i = 0; i < msix->msix_table_len; i++) { 1549 if (msix->msix_table[i].mte_vector == 0) 1550 continue; 1551 if (msix->msix_table[i].mte_handlers > 0) 1552 return (EBUSY); 1553 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1); 1554 KASSERT(rle != NULL, ("missing resource")); 1555 if (rle->res != NULL) 1556 return (EBUSY); 1557 } 1558 1559 /* Update control register to disable MSI-X. */ 1560 msix->msix_ctrl &= ~PCIM_MSIXCTRL_MSIX_ENABLE; 1561 pci_write_config(child, msix->msix_location + PCIR_MSIX_CTRL, 1562 msix->msix_ctrl, 2); 1563 1564 /* Free the resource list entries. */ 1565 for (i = 0; i < msix->msix_table_len; i++) { 1566 if (msix->msix_table[i].mte_vector == 0) 1567 continue; 1568 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1); 1569 } 1570 free(msix->msix_table, M_DEVBUF); 1571 msix->msix_table_len = 0; 1572 1573 /* Release the IRQs. */ 1574 for (i = 0; i < msix->msix_alloc; i++) 1575 PCIB_RELEASE_MSIX(device_get_parent(dev), child, 1576 msix->msix_vectors[i].mv_irq); 1577 free(msix->msix_vectors, M_DEVBUF); 1578 msix->msix_alloc = 0; 1579 return (0); 1580} 1581 1582/* 1583 * Return the max supported MSI-X messages this device supports. 1584 * Basically, assuming the MD code can alloc messages, this function 1585 * should return the maximum value that pci_alloc_msix() can return. 1586 * Thus, it is subject to the tunables, etc. 1587 */ 1588int 1589pci_msix_count_method(device_t dev, device_t child) 1590{ 1591 struct pci_devinfo *dinfo = device_get_ivars(child); 1592 struct pcicfg_msix *msix = &dinfo->cfg.msix; 1593 1594 if (pci_do_msix && msix->msix_location != 0) 1595 return (msix->msix_msgnum); 1596 return (0); 1597} 1598 1599/* 1600 * HyperTransport MSI mapping control 1601 */ 1602void 1603pci_ht_map_msi(device_t dev, uint64_t addr) 1604{ 1605 struct pci_devinfo *dinfo = device_get_ivars(dev); 1606 struct pcicfg_ht *ht = &dinfo->cfg.ht; 1607 1608 if (!ht->ht_msimap) 1609 return; 1610 1611 if (addr && !(ht->ht_msictrl & PCIM_HTCMD_MSI_ENABLE) && 1612 ht->ht_msiaddr >> 20 == addr >> 20) { 1613 /* Enable MSI -> HT mapping. */ 1614 ht->ht_msictrl |= PCIM_HTCMD_MSI_ENABLE; 1615 pci_write_config(dev, ht->ht_msimap + PCIR_HT_COMMAND, 1616 ht->ht_msictrl, 2); 1617 } 1618 1619 if (!addr && ht->ht_msictrl & PCIM_HTCMD_MSI_ENABLE) { 1620 /* Disable MSI -> HT mapping. */ 1621 ht->ht_msictrl &= ~PCIM_HTCMD_MSI_ENABLE; 1622 pci_write_config(dev, ht->ht_msimap + PCIR_HT_COMMAND, 1623 ht->ht_msictrl, 2); 1624 } 1625} 1626 1627int 1628pci_get_max_read_req(device_t dev) 1629{ 1630 int cap; 1631 uint16_t val; 1632 1633 if (pci_find_extcap(dev, PCIY_EXPRESS, &cap) != 0) 1634 return (0); 1635 val = pci_read_config(dev, cap + PCIR_EXPRESS_DEVICE_CTL, 2); 1636 val &= PCIM_EXP_CTL_MAX_READ_REQUEST; 1637 val >>= 12; 1638 return (1 << (val + 7)); 1639} 1640 1641int 1642pci_set_max_read_req(device_t dev, int size) 1643{ 1644 int cap; 1645 uint16_t val; 1646 1647 if (pci_find_extcap(dev, PCIY_EXPRESS, &cap) != 0) 1648 return (0); 1649 if (size < 128) 1650 size = 128; 1651 if (size > 4096) 1652 size = 4096; 1653 size = (1 << (fls(size) - 1)); 1654 val = pci_read_config(dev, cap + PCIR_EXPRESS_DEVICE_CTL, 2); 1655 val &= ~PCIM_EXP_CTL_MAX_READ_REQUEST; 1656 val |= (fls(size) - 8) << 12; 1657 pci_write_config(dev, cap + PCIR_EXPRESS_DEVICE_CTL, val, 2); 1658 return (size); 1659} 1660 1661/* 1662 * Support for MSI message signalled interrupts. 1663 */ 1664void 1665pci_enable_msi(device_t dev, uint64_t address, uint16_t data) 1666{ 1667 struct pci_devinfo *dinfo = device_get_ivars(dev); 1668 struct pcicfg_msi *msi = &dinfo->cfg.msi; 1669 1670 /* Write data and address values. */ 1671 pci_write_config(dev, msi->msi_location + PCIR_MSI_ADDR, 1672 address & 0xffffffff, 4); 1673 if (msi->msi_ctrl & PCIM_MSICTRL_64BIT) { 1674 pci_write_config(dev, msi->msi_location + PCIR_MSI_ADDR_HIGH, 1675 address >> 32, 4); 1676 pci_write_config(dev, msi->msi_location + PCIR_MSI_DATA_64BIT, 1677 data, 2); 1678 } else 1679 pci_write_config(dev, msi->msi_location + PCIR_MSI_DATA, data, 1680 2); 1681 1682 /* Enable MSI in the control register. */ 1683 msi->msi_ctrl |= PCIM_MSICTRL_MSI_ENABLE; 1684 pci_write_config(dev, msi->msi_location + PCIR_MSI_CTRL, msi->msi_ctrl, 1685 2); 1686 1687 /* Enable MSI -> HT mapping. */ 1688 pci_ht_map_msi(dev, address); 1689} 1690 1691void 1692pci_disable_msi(device_t dev) 1693{ 1694 struct pci_devinfo *dinfo = device_get_ivars(dev); 1695 struct pcicfg_msi *msi = &dinfo->cfg.msi; 1696 1697 /* Disable MSI -> HT mapping. */ 1698 pci_ht_map_msi(dev, 0); 1699 1700 /* Disable MSI in the control register. */ 1701 msi->msi_ctrl &= ~PCIM_MSICTRL_MSI_ENABLE; 1702 pci_write_config(dev, msi->msi_location + PCIR_MSI_CTRL, msi->msi_ctrl, 1703 2); 1704} 1705 1706/* 1707 * Restore MSI registers during resume. If MSI is enabled then 1708 * restore the data and address registers in addition to the control 1709 * register. 1710 */ 1711static void 1712pci_resume_msi(device_t dev) 1713{ 1714 struct pci_devinfo *dinfo = device_get_ivars(dev); 1715 struct pcicfg_msi *msi = &dinfo->cfg.msi; 1716 uint64_t address; 1717 uint16_t data; 1718 1719 if (msi->msi_ctrl & PCIM_MSICTRL_MSI_ENABLE) { 1720 address = msi->msi_addr; 1721 data = msi->msi_data; 1722 pci_write_config(dev, msi->msi_location + PCIR_MSI_ADDR, 1723 address & 0xffffffff, 4); 1724 if (msi->msi_ctrl & PCIM_MSICTRL_64BIT) { 1725 pci_write_config(dev, msi->msi_location + 1726 PCIR_MSI_ADDR_HIGH, address >> 32, 4); 1727 pci_write_config(dev, msi->msi_location + 1728 PCIR_MSI_DATA_64BIT, data, 2); 1729 } else 1730 pci_write_config(dev, msi->msi_location + PCIR_MSI_DATA, 1731 data, 2); 1732 } 1733 pci_write_config(dev, msi->msi_location + PCIR_MSI_CTRL, msi->msi_ctrl, 1734 2); 1735} 1736 1737static int 1738pci_remap_intr_method(device_t bus, device_t dev, u_int irq) 1739{ 1740 struct pci_devinfo *dinfo = device_get_ivars(dev); 1741 pcicfgregs *cfg = &dinfo->cfg; 1742 struct resource_list_entry *rle; 1743 struct msix_table_entry *mte; 1744 struct msix_vector *mv; 1745 uint64_t addr; 1746 uint32_t data; 1747 int error, i, j; 1748 1749 /* 1750 * Handle MSI first. We try to find this IRQ among our list 1751 * of MSI IRQs. If we find it, we request updated address and 1752 * data registers and apply the results. 1753 */ 1754 if (cfg->msi.msi_alloc > 0) { 1755 1756 /* If we don't have any active handlers, nothing to do. */ 1757 if (cfg->msi.msi_handlers == 0) 1758 return (0); 1759 for (i = 0; i < cfg->msi.msi_alloc; i++) { 1760 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 1761 i + 1); 1762 if (rle->start == irq) { 1763 error = PCIB_MAP_MSI(device_get_parent(bus), 1764 dev, irq, &addr, &data); 1765 if (error) 1766 return (error); 1767 pci_disable_msi(dev); 1768 dinfo->cfg.msi.msi_addr = addr; 1769 dinfo->cfg.msi.msi_data = data; 1770 pci_enable_msi(dev, addr, data); 1771 return (0); 1772 } 1773 } 1774 return (ENOENT); 1775 } 1776 1777 /* 1778 * For MSI-X, we check to see if we have this IRQ. If we do, 1779 * we request the updated mapping info. If that works, we go 1780 * through all the slots that use this IRQ and update them. 1781 */ 1782 if (cfg->msix.msix_alloc > 0) { 1783 for (i = 0; i < cfg->msix.msix_alloc; i++) { 1784 mv = &cfg->msix.msix_vectors[i]; 1785 if (mv->mv_irq == irq) { 1786 error = PCIB_MAP_MSI(device_get_parent(bus), 1787 dev, irq, &addr, &data); 1788 if (error) 1789 return (error); 1790 mv->mv_address = addr; 1791 mv->mv_data = data; 1792 for (j = 0; j < cfg->msix.msix_table_len; j++) { 1793 mte = &cfg->msix.msix_table[j]; 1794 if (mte->mte_vector != i + 1) 1795 continue; 1796 if (mte->mte_handlers == 0) 1797 continue; 1798 pci_mask_msix(dev, j); 1799 pci_enable_msix(dev, j, addr, data); 1800 pci_unmask_msix(dev, j); 1801 } 1802 } 1803 } 1804 return (ENOENT); 1805 } 1806 1807 return (ENOENT); 1808} 1809 1810/* 1811 * Returns true if the specified device is blacklisted because MSI 1812 * doesn't work. 1813 */ 1814int 1815pci_msi_device_blacklisted(device_t dev) 1816{ 1817 struct pci_quirk *q; 1818 1819 if (!pci_honor_msi_blacklist) 1820 return (0); 1821 1822 for (q = &pci_quirks[0]; q->devid; q++) { 1823 if (q->devid == pci_get_devid(dev) && 1824 q->type == PCI_QUIRK_DISABLE_MSI) 1825 return (1); 1826 } 1827 return (0); 1828} 1829 1830/* 1831 * Determine if MSI is blacklisted globally on this sytem. Currently, 1832 * we just check for blacklisted chipsets as represented by the 1833 * host-PCI bridge at device 0:0:0. In the future, it may become 1834 * necessary to check other system attributes, such as the kenv values 1835 * that give the motherboard manufacturer and model number. 1836 */ 1837static int 1838pci_msi_blacklisted(void) 1839{ 1840 device_t dev; 1841 1842 if (!pci_honor_msi_blacklist) 1843 return (0); 1844 1845 /* Blacklist all non-PCI-express and non-PCI-X chipsets. */ 1846 if (!(pcie_chipset || pcix_chipset)) 1847 return (1); 1848 1849 dev = pci_find_bsf(0, 0, 0); 1850 if (dev != NULL) 1851 return (pci_msi_device_blacklisted(dev)); 1852 return (0); 1853} 1854 1855/* 1856 * Attempt to allocate *count MSI messages. The actual number allocated is 1857 * returned in *count. After this function returns, each message will be 1858 * available to the driver as SYS_RES_IRQ resources starting at a rid 1. 1859 */ 1860int 1861pci_alloc_msi_method(device_t dev, device_t child, int *count) 1862{ 1863 struct pci_devinfo *dinfo = device_get_ivars(child); 1864 pcicfgregs *cfg = &dinfo->cfg; 1865 struct resource_list_entry *rle; 1866 int actual, error, i, irqs[32]; 1867 uint16_t ctrl; 1868 1869 /* Don't let count == 0 get us into trouble. */ 1870 if (*count == 0) 1871 return (EINVAL); 1872 1873 /* If rid 0 is allocated, then fail. */ 1874 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0); 1875 if (rle != NULL && rle->res != NULL) 1876 return (ENXIO); 1877 1878 /* Already have allocated messages? */ 1879 if (cfg->msi.msi_alloc != 0 || cfg->msix.msix_alloc != 0) 1880 return (ENXIO); 1881 1882 /* If MSI is blacklisted for this system, fail. */ 1883 if (pci_msi_blacklisted()) 1884 return (ENXIO); 1885 1886 /* MSI capability present? */ 1887 if (cfg->msi.msi_location == 0 || !pci_do_msi) 1888 return (ENODEV); 1889 1890 if (bootverbose) 1891 device_printf(child, 1892 "attempting to allocate %d MSI vectors (%d supported)\n", 1893 *count, cfg->msi.msi_msgnum); 1894 1895 /* Don't ask for more than the device supports. */ 1896 actual = min(*count, cfg->msi.msi_msgnum); 1897 1898 /* Don't ask for more than 32 messages. */ 1899 actual = min(actual, 32); 1900 1901 /* MSI requires power of 2 number of messages. */ 1902 if (!powerof2(actual)) 1903 return (EINVAL); 1904 1905 for (;;) { 1906 /* Try to allocate N messages. */ 1907 error = PCIB_ALLOC_MSI(device_get_parent(dev), child, actual, 1908 cfg->msi.msi_msgnum, irqs); 1909 if (error == 0) 1910 break; 1911 if (actual == 1) 1912 return (error); 1913 1914 /* Try N / 2. */ 1915 actual >>= 1; 1916 } 1917 1918 /* 1919 * We now have N actual messages mapped onto SYS_RES_IRQ 1920 * resources in the irqs[] array, so add new resources 1921 * starting at rid 1. 1922 */ 1923 for (i = 0; i < actual; i++) 1924 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, 1925 irqs[i], irqs[i], 1); 1926 1927 if (bootverbose) { 1928 if (actual == 1) 1929 device_printf(child, "using IRQ %d for MSI\n", irqs[0]); 1930 else { 1931 int run; 1932 1933 /* 1934 * Be fancy and try to print contiguous runs 1935 * of IRQ values as ranges. 'run' is true if 1936 * we are in a range. 1937 */ 1938 device_printf(child, "using IRQs %d", irqs[0]); 1939 run = 0; 1940 for (i = 1; i < actual; i++) { 1941 1942 /* Still in a run? */ 1943 if (irqs[i] == irqs[i - 1] + 1) { 1944 run = 1; 1945 continue; 1946 } 1947 1948 /* Finish previous range. */ 1949 if (run) { 1950 printf("-%d", irqs[i - 1]); 1951 run = 0; 1952 } 1953 1954 /* Start new range. */ 1955 printf(",%d", irqs[i]); 1956 } 1957 1958 /* Unfinished range? */ 1959 if (run) 1960 printf("-%d", irqs[actual - 1]); 1961 printf(" for MSI\n"); 1962 } 1963 } 1964 1965 /* Update control register with actual count. */ 1966 ctrl = cfg->msi.msi_ctrl; 1967 ctrl &= ~PCIM_MSICTRL_MME_MASK; 1968 ctrl |= (ffs(actual) - 1) << 4; 1969 cfg->msi.msi_ctrl = ctrl; 1970 pci_write_config(child, cfg->msi.msi_location + PCIR_MSI_CTRL, ctrl, 2); 1971 1972 /* Update counts of alloc'd messages. */ 1973 cfg->msi.msi_alloc = actual; 1974 cfg->msi.msi_handlers = 0; 1975 *count = actual; 1976 return (0); 1977} 1978 1979/* Release the MSI messages associated with this device. */ 1980int 1981pci_release_msi_method(device_t dev, device_t child) 1982{ 1983 struct pci_devinfo *dinfo = device_get_ivars(child); 1984 struct pcicfg_msi *msi = &dinfo->cfg.msi; 1985 struct resource_list_entry *rle; 1986 int error, i, irqs[32]; 1987 1988 /* Try MSI-X first. */ 1989 error = pci_release_msix(dev, child); 1990 if (error != ENODEV) 1991 return (error); 1992 1993 /* Do we have any messages to release? */ 1994 if (msi->msi_alloc == 0) 1995 return (ENODEV); 1996 KASSERT(msi->msi_alloc <= 32, ("more than 32 alloc'd messages")); 1997 1998 /* Make sure none of the resources are allocated. */ 1999 if (msi->msi_handlers > 0) 2000 return (EBUSY); 2001 for (i = 0; i < msi->msi_alloc; i++) { 2002 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1); 2003 KASSERT(rle != NULL, ("missing MSI resource")); 2004 if (rle->res != NULL) 2005 return (EBUSY); 2006 irqs[i] = rle->start; 2007 } 2008 2009 /* Update control register with 0 count. */ 2010 KASSERT(!(msi->msi_ctrl & PCIM_MSICTRL_MSI_ENABLE), 2011 ("%s: MSI still enabled", __func__)); 2012 msi->msi_ctrl &= ~PCIM_MSICTRL_MME_MASK; 2013 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL, 2014 msi->msi_ctrl, 2); 2015 2016 /* Release the messages. */ 2017 PCIB_RELEASE_MSI(device_get_parent(dev), child, msi->msi_alloc, irqs); 2018 for (i = 0; i < msi->msi_alloc; i++) 2019 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1); 2020 2021 /* Update alloc count. */ 2022 msi->msi_alloc = 0; 2023 msi->msi_addr = 0; 2024 msi->msi_data = 0; 2025 return (0); 2026} 2027 2028/* 2029 * Return the max supported MSI messages this device supports. 2030 * Basically, assuming the MD code can alloc messages, this function 2031 * should return the maximum value that pci_alloc_msi() can return. 2032 * Thus, it is subject to the tunables, etc. 2033 */ 2034int 2035pci_msi_count_method(device_t dev, device_t child) 2036{ 2037 struct pci_devinfo *dinfo = device_get_ivars(child); 2038 struct pcicfg_msi *msi = &dinfo->cfg.msi; 2039 2040 if (pci_do_msi && msi->msi_location != 0) 2041 return (msi->msi_msgnum); 2042 return (0); 2043} 2044 2045/* free pcicfgregs structure and all depending data structures */ 2046 2047int 2048pci_freecfg(struct pci_devinfo *dinfo) 2049{ 2050 struct devlist *devlist_head; 2051 int i; 2052 2053 devlist_head = &pci_devq; 2054 2055 if (dinfo->cfg.vpd.vpd_reg) { 2056 free(dinfo->cfg.vpd.vpd_ident, M_DEVBUF); 2057 for (i = 0; i < dinfo->cfg.vpd.vpd_rocnt; i++) 2058 free(dinfo->cfg.vpd.vpd_ros[i].value, M_DEVBUF); 2059 free(dinfo->cfg.vpd.vpd_ros, M_DEVBUF); 2060 for (i = 0; i < dinfo->cfg.vpd.vpd_wcnt; i++) 2061 free(dinfo->cfg.vpd.vpd_w[i].value, M_DEVBUF); 2062 free(dinfo->cfg.vpd.vpd_w, M_DEVBUF); 2063 } 2064 STAILQ_REMOVE(devlist_head, dinfo, pci_devinfo, pci_links); 2065 free(dinfo, M_DEVBUF); 2066 2067 /* increment the generation count */ 2068 pci_generation++; 2069 2070 /* we're losing one device */ 2071 pci_numdevs--; 2072 return (0); 2073} 2074 2075/* 2076 * PCI power manangement 2077 */ 2078int 2079pci_set_powerstate_method(device_t dev, device_t child, int state) 2080{ 2081 struct pci_devinfo *dinfo = device_get_ivars(child); 2082 pcicfgregs *cfg = &dinfo->cfg; 2083 uint16_t status; 2084 int result, oldstate, highest, delay; 2085 2086 if (cfg->pp.pp_cap == 0) 2087 return (EOPNOTSUPP); 2088 2089 /* 2090 * Optimize a no state change request away. While it would be OK to 2091 * write to the hardware in theory, some devices have shown odd 2092 * behavior when going from D3 -> D3. 2093 */ 2094 oldstate = pci_get_powerstate(child); 2095 if (oldstate == state) 2096 return (0); 2097 2098 /* 2099 * The PCI power management specification states that after a state 2100 * transition between PCI power states, system software must 2101 * guarantee a minimal delay before the function accesses the device. 2102 * Compute the worst case delay that we need to guarantee before we 2103 * access the device. Many devices will be responsive much more 2104 * quickly than this delay, but there are some that don't respond 2105 * instantly to state changes. Transitions to/from D3 state require 2106 * 10ms, while D2 requires 200us, and D0/1 require none. The delay 2107 * is done below with DELAY rather than a sleeper function because 2108 * this function can be called from contexts where we cannot sleep. 2109 */ 2110 highest = (oldstate > state) ? oldstate : state; 2111 if (highest == PCI_POWERSTATE_D3) 2112 delay = 10000; 2113 else if (highest == PCI_POWERSTATE_D2) 2114 delay = 200; 2115 else 2116 delay = 0; 2117 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2) 2118 & ~PCIM_PSTAT_DMASK; 2119 result = 0; 2120 switch (state) { 2121 case PCI_POWERSTATE_D0: 2122 status |= PCIM_PSTAT_D0; 2123 break; 2124 case PCI_POWERSTATE_D1: 2125 if ((cfg->pp.pp_cap & PCIM_PCAP_D1SUPP) == 0) 2126 return (EOPNOTSUPP); 2127 status |= PCIM_PSTAT_D1; 2128 break; 2129 case PCI_POWERSTATE_D2: 2130 if ((cfg->pp.pp_cap & PCIM_PCAP_D2SUPP) == 0) 2131 return (EOPNOTSUPP); 2132 status |= PCIM_PSTAT_D2; 2133 break; 2134 case PCI_POWERSTATE_D3: 2135 status |= PCIM_PSTAT_D3; 2136 break; 2137 default: 2138 return (EINVAL); 2139 } 2140 2141 if (bootverbose) 2142 pci_printf(cfg, "Transition from D%d to D%d\n", oldstate, 2143 state); 2144 2145 PCI_WRITE_CONFIG(dev, child, cfg->pp.pp_status, status, 2); 2146 if (delay) 2147 DELAY(delay); 2148 return (0); 2149} 2150 2151int 2152pci_get_powerstate_method(device_t dev, device_t child) 2153{ 2154 struct pci_devinfo *dinfo = device_get_ivars(child); 2155 pcicfgregs *cfg = &dinfo->cfg; 2156 uint16_t status; 2157 int result; 2158 2159 if (cfg->pp.pp_cap != 0) { 2160 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2); 2161 switch (status & PCIM_PSTAT_DMASK) { 2162 case PCIM_PSTAT_D0: 2163 result = PCI_POWERSTATE_D0; 2164 break; 2165 case PCIM_PSTAT_D1: 2166 result = PCI_POWERSTATE_D1; 2167 break; 2168 case PCIM_PSTAT_D2: 2169 result = PCI_POWERSTATE_D2; 2170 break; 2171 case PCIM_PSTAT_D3: 2172 result = PCI_POWERSTATE_D3; 2173 break; 2174 default: 2175 result = PCI_POWERSTATE_UNKNOWN; 2176 break; 2177 } 2178 } else { 2179 /* No support, device is always at D0 */ 2180 result = PCI_POWERSTATE_D0; 2181 } 2182 return (result); 2183} 2184 2185/* 2186 * Some convenience functions for PCI device drivers. 2187 */ 2188 2189static __inline void 2190pci_set_command_bit(device_t dev, device_t child, uint16_t bit) 2191{ 2192 uint16_t command; 2193 2194 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2); 2195 command |= bit; 2196 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2); 2197} 2198 2199static __inline void 2200pci_clear_command_bit(device_t dev, device_t child, uint16_t bit) 2201{ 2202 uint16_t command; 2203 2204 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2); 2205 command &= ~bit; 2206 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2); 2207} 2208 2209int 2210pci_enable_busmaster_method(device_t dev, device_t child) 2211{ 2212 pci_set_command_bit(dev, child, PCIM_CMD_BUSMASTEREN); 2213 return (0); 2214} 2215 2216int 2217pci_disable_busmaster_method(device_t dev, device_t child) 2218{ 2219 pci_clear_command_bit(dev, child, PCIM_CMD_BUSMASTEREN); 2220 return (0); 2221} 2222 2223int 2224pci_enable_io_method(device_t dev, device_t child, int space) 2225{ 2226 uint16_t bit; 2227 2228 switch(space) { 2229 case SYS_RES_IOPORT: 2230 bit = PCIM_CMD_PORTEN; 2231 break; 2232 case SYS_RES_MEMORY: 2233 bit = PCIM_CMD_MEMEN; 2234 break; 2235 default: 2236 return (EINVAL); 2237 } 2238 pci_set_command_bit(dev, child, bit); 2239 return (0); 2240} 2241 2242int 2243pci_disable_io_method(device_t dev, device_t child, int space) 2244{ 2245 uint16_t bit; 2246 2247 switch(space) { 2248 case SYS_RES_IOPORT: 2249 bit = PCIM_CMD_PORTEN; 2250 break; 2251 case SYS_RES_MEMORY: 2252 bit = PCIM_CMD_MEMEN; 2253 break; 2254 default: 2255 return (EINVAL); 2256 } 2257 pci_clear_command_bit(dev, child, bit); 2258 return (0); 2259} 2260 2261/* 2262 * New style pci driver. Parent device is either a pci-host-bridge or a 2263 * pci-pci-bridge. Both kinds are represented by instances of pcib. 2264 */ 2265 2266void 2267pci_print_verbose(struct pci_devinfo *dinfo) 2268{ 2269 2270 if (bootverbose) { 2271 pcicfgregs *cfg = &dinfo->cfg; 2272 2273 printf("found->\tvendor=0x%04x, dev=0x%04x, revid=0x%02x\n", 2274 cfg->vendor, cfg->device, cfg->revid); 2275 printf("\tdomain=%d, bus=%d, slot=%d, func=%d\n", 2276 cfg->domain, cfg->bus, cfg->slot, cfg->func); 2277 printf("\tclass=%02x-%02x-%02x, hdrtype=0x%02x, mfdev=%d\n", 2278 cfg->baseclass, cfg->subclass, cfg->progif, cfg->hdrtype, 2279 cfg->mfdev); 2280 printf("\tcmdreg=0x%04x, statreg=0x%04x, cachelnsz=%d (dwords)\n", 2281 cfg->cmdreg, cfg->statreg, cfg->cachelnsz); 2282 printf("\tlattimer=0x%02x (%d ns), mingnt=0x%02x (%d ns), maxlat=0x%02x (%d ns)\n", 2283 cfg->lattimer, cfg->lattimer * 30, cfg->mingnt, 2284 cfg->mingnt * 250, cfg->maxlat, cfg->maxlat * 250); 2285 if (cfg->intpin > 0) 2286 printf("\tintpin=%c, irq=%d\n", 2287 cfg->intpin +'a' -1, cfg->intline); 2288 if (cfg->pp.pp_cap) { 2289 uint16_t status; 2290 2291 status = pci_read_config(cfg->dev, cfg->pp.pp_status, 2); 2292 printf("\tpowerspec %d supports D0%s%s D3 current D%d\n", 2293 cfg->pp.pp_cap & PCIM_PCAP_SPEC, 2294 cfg->pp.pp_cap & PCIM_PCAP_D1SUPP ? " D1" : "", 2295 cfg->pp.pp_cap & PCIM_PCAP_D2SUPP ? " D2" : "", 2296 status & PCIM_PSTAT_DMASK); 2297 } 2298 if (cfg->msi.msi_location) { 2299 int ctrl; 2300 2301 ctrl = cfg->msi.msi_ctrl; 2302 printf("\tMSI supports %d message%s%s%s\n", 2303 cfg->msi.msi_msgnum, 2304 (cfg->msi.msi_msgnum == 1) ? "" : "s", 2305 (ctrl & PCIM_MSICTRL_64BIT) ? ", 64 bit" : "", 2306 (ctrl & PCIM_MSICTRL_VECTOR) ? ", vector masks":""); 2307 } 2308 if (cfg->msix.msix_location) { 2309 printf("\tMSI-X supports %d message%s ", 2310 cfg->msix.msix_msgnum, 2311 (cfg->msix.msix_msgnum == 1) ? "" : "s"); 2312 if (cfg->msix.msix_table_bar == cfg->msix.msix_pba_bar) 2313 printf("in map 0x%x\n", 2314 cfg->msix.msix_table_bar); 2315 else 2316 printf("in maps 0x%x and 0x%x\n", 2317 cfg->msix.msix_table_bar, 2318 cfg->msix.msix_pba_bar); 2319 } 2320 } 2321} 2322 2323static int 2324pci_porten(device_t dev) 2325{ 2326 return (pci_read_config(dev, PCIR_COMMAND, 2) & PCIM_CMD_PORTEN) != 0; 2327} 2328 2329static int 2330pci_memen(device_t dev) 2331{ 2332 return (pci_read_config(dev, PCIR_COMMAND, 2) & PCIM_CMD_MEMEN) != 0; 2333} 2334 2335static void 2336pci_read_bar(device_t dev, int reg, pci_addr_t *mapp, pci_addr_t *testvalp) 2337{ 2338 pci_addr_t map, testval; 2339 int ln2range; 2340 uint16_t cmd; 2341 2342 /* 2343 * The device ROM BAR is special. It is always a 32-bit 2344 * memory BAR. Bit 0 is special and should not be set when 2345 * sizing the BAR. 2346 */ 2347 if (reg == PCIR_BIOS) { 2348 map = pci_read_config(dev, reg, 4); 2349 pci_write_config(dev, reg, 0xfffffffe, 4); 2350 testval = pci_read_config(dev, reg, 4); 2351 pci_write_config(dev, reg, map, 4); 2352 *mapp = map; 2353 *testvalp = testval; 2354 return; 2355 } 2356 2357 map = pci_read_config(dev, reg, 4); 2358 ln2range = pci_maprange(map); 2359 if (ln2range == 64) 2360 map |= (pci_addr_t)pci_read_config(dev, reg + 4, 4) << 32; 2361 2362 /* 2363 * Disable decoding via the command register before 2364 * determining the BAR's length since we will be placing it in 2365 * a weird state. 2366 */ 2367 cmd = pci_read_config(dev, PCIR_COMMAND, 2); 2368 pci_write_config(dev, PCIR_COMMAND, 2369 cmd & ~(PCI_BAR_MEM(map) ? PCIM_CMD_MEMEN : PCIM_CMD_PORTEN), 2); 2370 2371 /* 2372 * Determine the BAR's length by writing all 1's. The bottom 2373 * log_2(size) bits of the BAR will stick as 0 when we read 2374 * the value back. 2375 */ 2376 pci_write_config(dev, reg, 0xffffffff, 4); 2377 testval = pci_read_config(dev, reg, 4); 2378 if (ln2range == 64) { 2379 pci_write_config(dev, reg + 4, 0xffffffff, 4); 2380 testval |= (pci_addr_t)pci_read_config(dev, reg + 4, 4) << 32; 2381 } 2382 2383 /* 2384 * Restore the original value of the BAR. We may have reprogrammed 2385 * the BAR of the low-level console device and when booting verbose, 2386 * we need the console device addressable. 2387 */ 2388 pci_write_config(dev, reg, map, 4); 2389 if (ln2range == 64) 2390 pci_write_config(dev, reg + 4, map >> 32, 4); 2391 pci_write_config(dev, PCIR_COMMAND, cmd, 2); 2392 2393 *mapp = map; 2394 *testvalp = testval; 2395} 2396 2397static void 2398pci_write_bar(device_t dev, int reg, pci_addr_t base) 2399{ 2400 pci_addr_t map; 2401 int ln2range; 2402 2403 map = pci_read_config(dev, reg, 4); 2404 2405 /* The device ROM BAR is always 32-bits. */ 2406 if (reg == PCIR_BIOS) 2407 return; 2408 ln2range = pci_maprange(map); 2409 pci_write_config(dev, reg, base, 4); 2410 if (ln2range == 64) 2411 pci_write_config(dev, reg + 4, base >> 32, 4); 2412} 2413 2414/* 2415 * Add a resource based on a pci map register. Return 1 if the map 2416 * register is a 32bit map register or 2 if it is a 64bit register. 2417 */ 2418static int 2419pci_add_map(device_t bus, device_t dev, int reg, struct resource_list *rl, 2420 int force, int prefetch) 2421{ 2422 pci_addr_t base, map, testval; 2423 pci_addr_t start, end, count; 2424 int barlen, basezero, maprange, mapsize, type; 2425 uint16_t cmd; 2426 struct resource *res; 2427 2428 pci_read_bar(dev, reg, &map, &testval); 2429 if (PCI_BAR_MEM(map)) { 2430 type = SYS_RES_MEMORY; 2431 if (map & PCIM_BAR_MEM_PREFETCH) 2432 prefetch = 1; 2433 } else 2434 type = SYS_RES_IOPORT; 2435 mapsize = pci_mapsize(testval); 2436 base = pci_mapbase(map); 2437#ifdef __PCI_BAR_ZERO_VALID 2438 basezero = 0; 2439#else 2440 basezero = base == 0; 2441#endif 2442 maprange = pci_maprange(map); 2443 barlen = maprange == 64 ? 2 : 1; 2444 2445 /* 2446 * For I/O registers, if bottom bit is set, and the next bit up 2447 * isn't clear, we know we have a BAR that doesn't conform to the 2448 * spec, so ignore it. Also, sanity check the size of the data 2449 * areas to the type of memory involved. Memory must be at least 2450 * 16 bytes in size, while I/O ranges must be at least 4. 2451 */ 2452 if (PCI_BAR_IO(testval) && (testval & PCIM_BAR_IO_RESERVED) != 0) 2453 return (barlen); 2454 if ((type == SYS_RES_MEMORY && mapsize < 4) || 2455 (type == SYS_RES_IOPORT && mapsize < 2)) 2456 return (barlen); 2457 2458 if (bootverbose) { 2459 printf("\tmap[%02x]: type %s, range %2d, base %#jx, size %2d", 2460 reg, pci_maptype(map), maprange, (uintmax_t)base, mapsize); 2461 if (type == SYS_RES_IOPORT && !pci_porten(dev)) 2462 printf(", port disabled\n"); 2463 else if (type == SYS_RES_MEMORY && !pci_memen(dev)) 2464 printf(", memory disabled\n"); 2465 else 2466 printf(", enabled\n"); 2467 } 2468 2469 /* 2470 * If base is 0, then we have problems if this architecture does 2471 * not allow that. It is best to ignore such entries for the 2472 * moment. These will be allocated later if the driver specifically 2473 * requests them. However, some removable busses look better when 2474 * all resources are allocated, so allow '0' to be overriden. 2475 * 2476 * Similarly treat maps whose values is the same as the test value 2477 * read back. These maps have had all f's written to them by the 2478 * BIOS in an attempt to disable the resources. 2479 */ 2480 if (!force && (basezero || map == testval)) 2481 return (barlen); 2482 if ((u_long)base != base) { 2483 device_printf(bus, 2484 "pci%d:%d:%d:%d bar %#x too many address bits", 2485 pci_get_domain(dev), pci_get_bus(dev), pci_get_slot(dev), 2486 pci_get_function(dev), reg); 2487 return (barlen); 2488 } 2489 2490 /* 2491 * This code theoretically does the right thing, but has 2492 * undesirable side effects in some cases where peripherals 2493 * respond oddly to having these bits enabled. Let the user 2494 * be able to turn them off (since pci_enable_io_modes is 1 by 2495 * default). 2496 */ 2497 if (pci_enable_io_modes) { 2498 /* Turn on resources that have been left off by a lazy BIOS */ 2499 if (type == SYS_RES_IOPORT && !pci_porten(dev)) { 2500 cmd = pci_read_config(dev, PCIR_COMMAND, 2); 2501 cmd |= PCIM_CMD_PORTEN; 2502 pci_write_config(dev, PCIR_COMMAND, cmd, 2); 2503 } 2504 if (type == SYS_RES_MEMORY && !pci_memen(dev)) { 2505 cmd = pci_read_config(dev, PCIR_COMMAND, 2); 2506 cmd |= PCIM_CMD_MEMEN; 2507 pci_write_config(dev, PCIR_COMMAND, cmd, 2); 2508 } 2509 } else { 2510 if (type == SYS_RES_IOPORT && !pci_porten(dev)) 2511 return (barlen); 2512 if (type == SYS_RES_MEMORY && !pci_memen(dev)) 2513 return (barlen); 2514 } 2515 2516 count = 1 << mapsize; 2517 if (basezero || base == pci_mapbase(testval)) { 2518 start = 0; /* Let the parent decide. */ 2519 end = ~0ULL; 2520 } else { 2521 start = base; 2522 end = base + (1 << mapsize) - 1; 2523 } 2524 resource_list_add(rl, type, reg, start, end, count); 2525 2526 /* 2527 * Try to allocate the resource for this BAR from our parent 2528 * so that this resource range is already reserved. The 2529 * driver for this device will later inherit this resource in 2530 * pci_alloc_resource(). 2531 */ 2532 res = resource_list_reserve(rl, bus, dev, type, ®, start, end, count, 2533 prefetch ? RF_PREFETCHABLE : 0); 2534 if (res == NULL) { 2535 /* 2536 * If the allocation fails, clear the BAR and delete 2537 * the resource list entry to force 2538 * pci_alloc_resource() to allocate resources from the 2539 * parent. 2540 */ 2541 resource_list_delete(rl, type, reg); 2542 start = 0; 2543 } else 2544 start = rman_get_start(res); 2545 pci_write_bar(dev, reg, start); 2546 return (barlen); 2547} 2548 2549/* 2550 * For ATA devices we need to decide early what addressing mode to use. 2551 * Legacy demands that the primary and secondary ATA ports sits on the 2552 * same addresses that old ISA hardware did. This dictates that we use 2553 * those addresses and ignore the BAR's if we cannot set PCI native 2554 * addressing mode. 2555 */ 2556static void 2557pci_ata_maps(device_t bus, device_t dev, struct resource_list *rl, int force, 2558 uint32_t prefetchmask) 2559{ 2560 struct resource *r; 2561 int rid, type, progif; 2562#if 0 2563 /* if this device supports PCI native addressing use it */ 2564 progif = pci_read_config(dev, PCIR_PROGIF, 1); 2565 if ((progif & 0x8a) == 0x8a) { 2566 if (pci_mapbase(pci_read_config(dev, PCIR_BAR(0), 4)) && 2567 pci_mapbase(pci_read_config(dev, PCIR_BAR(2), 4))) { 2568 printf("Trying ATA native PCI addressing mode\n"); 2569 pci_write_config(dev, PCIR_PROGIF, progif | 0x05, 1); 2570 } 2571 } 2572#endif 2573 progif = pci_read_config(dev, PCIR_PROGIF, 1); 2574 type = SYS_RES_IOPORT; 2575 if (progif & PCIP_STORAGE_IDE_MODEPRIM) { 2576 pci_add_map(bus, dev, PCIR_BAR(0), rl, force, 2577 prefetchmask & (1 << 0)); 2578 pci_add_map(bus, dev, PCIR_BAR(1), rl, force, 2579 prefetchmask & (1 << 1)); 2580 } else { 2581 rid = PCIR_BAR(0); 2582 resource_list_add(rl, type, rid, 0x1f0, 0x1f7, 8); 2583 r = resource_list_reserve(rl, bus, dev, type, &rid, 0x1f0, 2584 0x1f7, 8, 0); 2585 rid = PCIR_BAR(1); 2586 resource_list_add(rl, type, rid, 0x3f6, 0x3f6, 1); 2587 r = resource_list_reserve(rl, bus, dev, type, &rid, 0x3f6, 2588 0x3f6, 1, 0); 2589 } 2590 if (progif & PCIP_STORAGE_IDE_MODESEC) { 2591 pci_add_map(bus, dev, PCIR_BAR(2), rl, force, 2592 prefetchmask & (1 << 2)); 2593 pci_add_map(bus, dev, PCIR_BAR(3), rl, force, 2594 prefetchmask & (1 << 3)); 2595 } else { 2596 rid = PCIR_BAR(2); 2597 resource_list_add(rl, type, rid, 0x170, 0x177, 8); 2598 r = resource_list_reserve(rl, bus, dev, type, &rid, 0x170, 2599 0x177, 8, 0); 2600 rid = PCIR_BAR(3); 2601 resource_list_add(rl, type, rid, 0x376, 0x376, 1); 2602 r = resource_list_reserve(rl, bus, dev, type, &rid, 0x376, 2603 0x376, 1, 0); 2604 } 2605 pci_add_map(bus, dev, PCIR_BAR(4), rl, force, 2606 prefetchmask & (1 << 4)); 2607 pci_add_map(bus, dev, PCIR_BAR(5), rl, force, 2608 prefetchmask & (1 << 5)); 2609} 2610 2611static void 2612pci_assign_interrupt(device_t bus, device_t dev, int force_route) 2613{ 2614 struct pci_devinfo *dinfo = device_get_ivars(dev); 2615 pcicfgregs *cfg = &dinfo->cfg; 2616 char tunable_name[64]; 2617 int irq; 2618 2619 /* Has to have an intpin to have an interrupt. */ 2620 if (cfg->intpin == 0) 2621 return; 2622 2623 /* Let the user override the IRQ with a tunable. */ 2624 irq = PCI_INVALID_IRQ; 2625 snprintf(tunable_name, sizeof(tunable_name), 2626 "hw.pci%d.%d.%d.INT%c.irq", 2627 cfg->domain, cfg->bus, cfg->slot, cfg->intpin + 'A' - 1); 2628 if (TUNABLE_INT_FETCH(tunable_name, &irq) && (irq >= 255 || irq <= 0)) 2629 irq = PCI_INVALID_IRQ; 2630 2631 /* 2632 * If we didn't get an IRQ via the tunable, then we either use the 2633 * IRQ value in the intline register or we ask the bus to route an 2634 * interrupt for us. If force_route is true, then we only use the 2635 * value in the intline register if the bus was unable to assign an 2636 * IRQ. 2637 */ 2638 if (!PCI_INTERRUPT_VALID(irq)) { 2639 if (!PCI_INTERRUPT_VALID(cfg->intline) || force_route) 2640 irq = PCI_ASSIGN_INTERRUPT(bus, dev); 2641 if (!PCI_INTERRUPT_VALID(irq)) 2642 irq = cfg->intline; 2643 } 2644 2645 /* If after all that we don't have an IRQ, just bail. */ 2646 if (!PCI_INTERRUPT_VALID(irq)) 2647 return; 2648 2649 /* Update the config register if it changed. */ 2650 if (irq != cfg->intline) { 2651 cfg->intline = irq; 2652 pci_write_config(dev, PCIR_INTLINE, irq, 1); 2653 } 2654 2655 /* Add this IRQ as rid 0 interrupt resource. */ 2656 resource_list_add(&dinfo->resources, SYS_RES_IRQ, 0, irq, irq, 1); 2657} 2658 2659/* Perform early OHCI takeover from SMM. */ 2660static void 2661ohci_early_takeover(device_t self) 2662{ 2663 struct resource *res; 2664 uint32_t ctl; 2665 int rid; 2666 int i; 2667 2668 rid = PCIR_BAR(0); 2669 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE); 2670 if (res == NULL) 2671 return; 2672 2673 ctl = bus_read_4(res, OHCI_CONTROL); 2674 if (ctl & OHCI_IR) { 2675 if (bootverbose) 2676 printf("ohci early: " 2677 "SMM active, request owner change\n"); 2678 bus_write_4(res, OHCI_COMMAND_STATUS, OHCI_OCR); 2679 for (i = 0; (i < 100) && (ctl & OHCI_IR); i++) { 2680 DELAY(1000); 2681 ctl = bus_read_4(res, OHCI_CONTROL); 2682 } 2683 if (ctl & OHCI_IR) { 2684 if (bootverbose) 2685 printf("ohci early: " 2686 "SMM does not respond, resetting\n"); 2687 bus_write_4(res, OHCI_CONTROL, OHCI_HCFS_RESET); 2688 } 2689 /* Disable interrupts */ 2690 bus_write_4(res, OHCI_INTERRUPT_DISABLE, OHCI_ALL_INTRS); 2691 } 2692 2693 bus_release_resource(self, SYS_RES_MEMORY, rid, res); 2694} 2695 2696/* Perform early UHCI takeover from SMM. */ 2697static void 2698uhci_early_takeover(device_t self) 2699{ 2700 struct resource *res; 2701 int rid; 2702 2703 /* 2704 * Set the PIRQD enable bit and switch off all the others. We don't 2705 * want legacy support to interfere with us XXX Does this also mean 2706 * that the BIOS won't touch the keyboard anymore if it is connected 2707 * to the ports of the root hub? 2708 */ 2709 pci_write_config(self, PCI_LEGSUP, PCI_LEGSUP_USBPIRQDEN, 2); 2710 2711 /* Disable interrupts */ 2712 rid = PCI_UHCI_BASE_REG; 2713 res = bus_alloc_resource_any(self, SYS_RES_IOPORT, &rid, RF_ACTIVE); 2714 if (res != NULL) { 2715 bus_write_2(res, UHCI_INTR, 0); 2716 bus_release_resource(self, SYS_RES_IOPORT, rid, res); 2717 } 2718} 2719 2720/* Perform early EHCI takeover from SMM. */ 2721static void 2722ehci_early_takeover(device_t self) 2723{ 2724 struct resource *res; 2725 uint32_t cparams; 2726 uint32_t eec; 2727 uint8_t eecp; 2728 uint8_t bios_sem; 2729 uint8_t offs; 2730 int rid; 2731 int i; 2732 2733 rid = PCIR_BAR(0); 2734 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE); 2735 if (res == NULL) 2736 return; 2737 2738 cparams = bus_read_4(res, EHCI_HCCPARAMS); 2739 2740 /* Synchronise with the BIOS if it owns the controller. */ 2741 for (eecp = EHCI_HCC_EECP(cparams); eecp != 0; 2742 eecp = EHCI_EECP_NEXT(eec)) { 2743 eec = pci_read_config(self, eecp, 4); 2744 if (EHCI_EECP_ID(eec) != EHCI_EC_LEGSUP) { 2745 continue; 2746 } 2747 bios_sem = pci_read_config(self, eecp + 2748 EHCI_LEGSUP_BIOS_SEM, 1); 2749 if (bios_sem == 0) { 2750 continue; 2751 } 2752 if (bootverbose) 2753 printf("ehci early: " 2754 "SMM active, request owner change\n"); 2755 2756 pci_write_config(self, eecp + EHCI_LEGSUP_OS_SEM, 1, 1); 2757 2758 for (i = 0; (i < 100) && (bios_sem != 0); i++) { 2759 DELAY(1000); 2760 bios_sem = pci_read_config(self, eecp + 2761 EHCI_LEGSUP_BIOS_SEM, 1); 2762 } 2763 2764 if (bios_sem != 0) { 2765 if (bootverbose) 2766 printf("ehci early: " 2767 "SMM does not respond\n"); 2768 } 2769 /* Disable interrupts */ 2770 offs = bus_read_1(res, EHCI_CAPLENGTH); 2771 bus_write_4(res, offs + EHCI_USBINTR, 0); 2772 } 2773 bus_release_resource(self, SYS_RES_MEMORY, rid, res); 2774} 2775 2776void 2777pci_add_resources(device_t bus, device_t dev, int force, uint32_t prefetchmask) 2778{ 2779 struct pci_devinfo *dinfo = device_get_ivars(dev); 2780 pcicfgregs *cfg = &dinfo->cfg; 2781 struct resource_list *rl = &dinfo->resources; 2782 struct pci_quirk *q; 2783 int i; 2784 2785 /* ATA devices needs special map treatment */ 2786 if ((pci_get_class(dev) == PCIC_STORAGE) && 2787 (pci_get_subclass(dev) == PCIS_STORAGE_IDE) && 2788 ((pci_get_progif(dev) & PCIP_STORAGE_IDE_MASTERDEV) || 2789 (!pci_read_config(dev, PCIR_BAR(0), 4) && 2790 !pci_read_config(dev, PCIR_BAR(2), 4))) ) 2791 pci_ata_maps(bus, dev, rl, force, prefetchmask); 2792 else 2793 for (i = 0; i < cfg->nummaps;) 2794 i += pci_add_map(bus, dev, PCIR_BAR(i), rl, force, 2795 prefetchmask & (1 << i)); 2796 2797 /* 2798 * Add additional, quirked resources. 2799 */ 2800 for (q = &pci_quirks[0]; q->devid; q++) { 2801 if (q->devid == ((cfg->device << 16) | cfg->vendor) 2802 && q->type == PCI_QUIRK_MAP_REG) 2803 pci_add_map(bus, dev, q->arg1, rl, force, 0); 2804 } 2805 2806 if (cfg->intpin > 0 && PCI_INTERRUPT_VALID(cfg->intline)) { 2807#ifdef __PCI_REROUTE_INTERRUPT 2808 /* 2809 * Try to re-route interrupts. Sometimes the BIOS or 2810 * firmware may leave bogus values in these registers. 2811 * If the re-route fails, then just stick with what we 2812 * have. 2813 */ 2814 pci_assign_interrupt(bus, dev, 1); 2815#else 2816 pci_assign_interrupt(bus, dev, 0); 2817#endif 2818 } 2819 2820 if (pci_usb_takeover && pci_get_class(dev) == PCIC_SERIALBUS && 2821 pci_get_subclass(dev) == PCIS_SERIALBUS_USB) { 2822 if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_EHCI) 2823 ehci_early_takeover(dev); 2824 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_OHCI) 2825 ohci_early_takeover(dev); 2826 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_UHCI) 2827 uhci_early_takeover(dev); 2828 } 2829} 2830 2831void 2832pci_add_children(device_t dev, int domain, int busno, size_t dinfo_size) 2833{ 2834#define REG(n, w) PCIB_READ_CONFIG(pcib, busno, s, f, n, w) 2835 device_t pcib = device_get_parent(dev); 2836 struct pci_devinfo *dinfo; 2837 int maxslots; 2838 int s, f, pcifunchigh; 2839 uint8_t hdrtype; 2840 2841 KASSERT(dinfo_size >= sizeof(struct pci_devinfo), 2842 ("dinfo_size too small")); 2843 maxslots = PCIB_MAXSLOTS(pcib); 2844 for (s = 0; s <= maxslots; s++) { 2845 pcifunchigh = 0; 2846 f = 0; 2847 DELAY(1); 2848 hdrtype = REG(PCIR_HDRTYPE, 1); 2849 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE) 2850 continue; 2851 if (hdrtype & PCIM_MFDEV) 2852 pcifunchigh = PCI_FUNCMAX; 2853 for (f = 0; f <= pcifunchigh; f++) { 2854 dinfo = pci_read_device(pcib, domain, busno, s, f, 2855 dinfo_size); 2856 if (dinfo != NULL) { 2857 pci_add_child(dev, dinfo); 2858 } 2859 } 2860 } 2861#undef REG 2862} 2863 2864void 2865pci_add_child(device_t bus, struct pci_devinfo *dinfo) 2866{ 2867 dinfo->cfg.dev = device_add_child(bus, NULL, -1); 2868 device_set_ivars(dinfo->cfg.dev, dinfo); 2869 resource_list_init(&dinfo->resources); 2870 pci_cfg_save(dinfo->cfg.dev, dinfo, 0); 2871 pci_cfg_restore(dinfo->cfg.dev, dinfo); 2872 pci_print_verbose(dinfo); 2873 pci_add_resources(bus, dinfo->cfg.dev, 0, 0); 2874} 2875 2876static int 2877pci_probe(device_t dev) 2878{ 2879 2880 device_set_desc(dev, "PCI bus"); 2881 2882 /* Allow other subclasses to override this driver. */ 2883 return (BUS_PROBE_GENERIC); 2884} 2885 2886static int 2887pci_attach(device_t dev) 2888{ 2889 int busno, domain; 2890 2891 /* 2892 * Since there can be multiple independantly numbered PCI 2893 * busses on systems with multiple PCI domains, we can't use 2894 * the unit number to decide which bus we are probing. We ask 2895 * the parent pcib what our domain and bus numbers are. 2896 */ 2897 domain = pcib_get_domain(dev); 2898 busno = pcib_get_bus(dev); 2899 if (bootverbose) 2900 device_printf(dev, "domain=%d, physical bus=%d\n", 2901 domain, busno); 2902 pci_add_children(dev, domain, busno, sizeof(struct pci_devinfo)); 2903 return (bus_generic_attach(dev)); 2904} 2905 2906static void 2907pci_set_power_children(device_t dev, device_t *devlist, int numdevs, 2908 int state) 2909{ 2910 device_t child, pcib; 2911 struct pci_devinfo *dinfo; 2912 int dstate, i; 2913 2914 /* 2915 * Set the device to the given state. If the firmware suggests 2916 * a different power state, use it instead. If power management 2917 * is not present, the firmware is responsible for managing 2918 * device power. Skip children who aren't attached since they 2919 * are handled separately. 2920 */ 2921 pcib = device_get_parent(dev); 2922 for (i = 0; i < numdevs; i++) { 2923 child = devlist[i]; 2924 dinfo = device_get_ivars(child); 2925 dstate = state; 2926 if (device_is_attached(child) && 2927 PCIB_POWER_FOR_SLEEP(pcib, dev, &dstate) == 0) 2928 pci_set_powerstate(child, dstate); 2929 } 2930} 2931 2932int 2933pci_suspend(device_t dev) 2934{ 2935 device_t child, *devlist; 2936 struct pci_devinfo *dinfo; 2937 int error, i, numdevs; 2938 2939 /* 2940 * Save the PCI configuration space for each child and set the 2941 * device in the appropriate power state for this sleep state. 2942 */ 2943 if ((error = device_get_children(dev, &devlist, &numdevs)) != 0) 2944 return (error); 2945 for (i = 0; i < numdevs; i++) { 2946 child = devlist[i]; 2947 dinfo = device_get_ivars(child); 2948 pci_cfg_save(child, dinfo, 0); 2949 } 2950 2951 /* Suspend devices before potentially powering them down. */ 2952 error = bus_generic_suspend(dev); 2953 if (error) { 2954 free(devlist, M_TEMP); 2955 return (error); 2956 } 2957 pci_set_power_children(dev, devlist, numdevs, PCI_POWERSTATE_D3); 2958 free(devlist, M_TEMP); 2959 return (0); 2960} 2961 2962int 2963pci_resume(device_t dev) 2964{ 2965 device_t child, *devlist; 2966 struct pci_devinfo *dinfo; 2967 int error, i, numdevs; 2968 2969 /* 2970 * Set each child to D0 and restore its PCI configuration space. 2971 */ 2972 if ((error = device_get_children(dev, &devlist, &numdevs)) != 0) 2973 return (error); 2974 if (pci_do_power_resume) 2975 pci_set_power_children(dev, devlist, numdevs, 2976 PCI_POWERSTATE_D0); 2977 2978 /* Now the device is powered up, restore its config space. */ 2979 for (i = 0; i < numdevs; i++) { 2980 child = devlist[i]; 2981 dinfo = device_get_ivars(child); 2982 2983 pci_cfg_restore(child, dinfo); 2984 if (!device_is_attached(child)) 2985 pci_cfg_save(child, dinfo, 1); 2986 } 2987 free(devlist, M_TEMP); 2988 return (bus_generic_resume(dev)); 2989} 2990 2991static void 2992pci_load_vendor_data(void) 2993{ 2994 caddr_t vendordata, info; 2995 2996 if ((vendordata = preload_search_by_type("pci_vendor_data")) != NULL) { 2997 info = preload_search_info(vendordata, MODINFO_ADDR); 2998 pci_vendordata = *(char **)info; 2999 info = preload_search_info(vendordata, MODINFO_SIZE); 3000 pci_vendordata_size = *(size_t *)info; 3001 /* terminate the database */ 3002 pci_vendordata[pci_vendordata_size] = '\n'; 3003 } 3004} 3005 3006void 3007pci_driver_added(device_t dev, driver_t *driver) 3008{ 3009 int numdevs; 3010 device_t *devlist; 3011 device_t child; 3012 struct pci_devinfo *dinfo; 3013 int i; 3014 3015 if (bootverbose) 3016 device_printf(dev, "driver added\n"); 3017 DEVICE_IDENTIFY(driver, dev); 3018 if (device_get_children(dev, &devlist, &numdevs) != 0) 3019 return; 3020 for (i = 0; i < numdevs; i++) { 3021 child = devlist[i]; 3022 if (device_get_state(child) != DS_NOTPRESENT) 3023 continue; 3024 dinfo = device_get_ivars(child); 3025 pci_print_verbose(dinfo); 3026 if (bootverbose) 3027 pci_printf(&dinfo->cfg, "reprobing on driver added\n"); 3028 pci_cfg_restore(child, dinfo); 3029 if (device_probe_and_attach(child) != 0) 3030 pci_cfg_save(child, dinfo, 1); 3031 } 3032 free(devlist, M_TEMP); 3033} 3034 3035int 3036pci_setup_intr(device_t dev, device_t child, struct resource *irq, int flags, 3037 driver_filter_t *filter, driver_intr_t *intr, void *arg, void **cookiep) 3038{ 3039 struct pci_devinfo *dinfo; 3040 struct msix_table_entry *mte; 3041 struct msix_vector *mv; 3042 uint64_t addr; 3043 uint32_t data; 3044 void *cookie; 3045 int error, rid; 3046 3047 error = bus_generic_setup_intr(dev, child, irq, flags, filter, intr, 3048 arg, &cookie); 3049 if (error) 3050 return (error); 3051 3052 /* If this is not a direct child, just bail out. */ 3053 if (device_get_parent(child) != dev) { 3054 *cookiep = cookie; 3055 return(0); 3056 } 3057 3058 rid = rman_get_rid(irq); 3059 if (rid == 0) { 3060 /* Make sure that INTx is enabled */ 3061 pci_clear_command_bit(dev, child, PCIM_CMD_INTxDIS); 3062 } else { 3063 /* 3064 * Check to see if the interrupt is MSI or MSI-X. 3065 * Ask our parent to map the MSI and give 3066 * us the address and data register values. 3067 * If we fail for some reason, teardown the 3068 * interrupt handler. 3069 */ 3070 dinfo = device_get_ivars(child); 3071 if (dinfo->cfg.msi.msi_alloc > 0) { 3072 if (dinfo->cfg.msi.msi_addr == 0) { 3073 KASSERT(dinfo->cfg.msi.msi_handlers == 0, 3074 ("MSI has handlers, but vectors not mapped")); 3075 error = PCIB_MAP_MSI(device_get_parent(dev), 3076 child, rman_get_start(irq), &addr, &data); 3077 if (error) 3078 goto bad; 3079 dinfo->cfg.msi.msi_addr = addr; 3080 dinfo->cfg.msi.msi_data = data; 3081 } 3082 if (dinfo->cfg.msi.msi_handlers == 0) 3083 pci_enable_msi(child, dinfo->cfg.msi.msi_addr, 3084 dinfo->cfg.msi.msi_data); 3085 dinfo->cfg.msi.msi_handlers++; 3086 } else { 3087 KASSERT(dinfo->cfg.msix.msix_alloc > 0, 3088 ("No MSI or MSI-X interrupts allocated")); 3089 KASSERT(rid <= dinfo->cfg.msix.msix_table_len, 3090 ("MSI-X index too high")); 3091 mte = &dinfo->cfg.msix.msix_table[rid - 1]; 3092 KASSERT(mte->mte_vector != 0, ("no message vector")); 3093 mv = &dinfo->cfg.msix.msix_vectors[mte->mte_vector - 1]; 3094 KASSERT(mv->mv_irq == rman_get_start(irq), 3095 ("IRQ mismatch")); 3096 if (mv->mv_address == 0) { 3097 KASSERT(mte->mte_handlers == 0, 3098 ("MSI-X table entry has handlers, but vector not mapped")); 3099 error = PCIB_MAP_MSI(device_get_parent(dev), 3100 child, rman_get_start(irq), &addr, &data); 3101 if (error) 3102 goto bad; 3103 mv->mv_address = addr; 3104 mv->mv_data = data; 3105 } 3106 if (mte->mte_handlers == 0) { 3107 pci_enable_msix(child, rid - 1, mv->mv_address, 3108 mv->mv_data); 3109 pci_unmask_msix(child, rid - 1); 3110 } 3111 mte->mte_handlers++; 3112 } 3113 3114 /* Make sure that INTx is disabled if we are using MSI/MSIX */ 3115 pci_set_command_bit(dev, child, PCIM_CMD_INTxDIS); 3116 bad: 3117 if (error) { 3118 (void)bus_generic_teardown_intr(dev, child, irq, 3119 cookie); 3120 return (error); 3121 } 3122 } 3123 *cookiep = cookie; 3124 return (0); 3125} 3126 3127int 3128pci_teardown_intr(device_t dev, device_t child, struct resource *irq, 3129 void *cookie) 3130{ 3131 struct msix_table_entry *mte; 3132 struct resource_list_entry *rle; 3133 struct pci_devinfo *dinfo; 3134 int error, rid; 3135 3136 if (irq == NULL || !(rman_get_flags(irq) & RF_ACTIVE)) 3137 return (EINVAL); 3138 3139 /* If this isn't a direct child, just bail out */ 3140 if (device_get_parent(child) != dev) 3141 return(bus_generic_teardown_intr(dev, child, irq, cookie)); 3142 3143 rid = rman_get_rid(irq); 3144 if (rid == 0) { 3145 /* Mask INTx */ 3146 pci_set_command_bit(dev, child, PCIM_CMD_INTxDIS); 3147 } else { 3148 /* 3149 * Check to see if the interrupt is MSI or MSI-X. If so, 3150 * decrement the appropriate handlers count and mask the 3151 * MSI-X message, or disable MSI messages if the count 3152 * drops to 0. 3153 */ 3154 dinfo = device_get_ivars(child); 3155 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, rid); 3156 if (rle->res != irq) 3157 return (EINVAL); 3158 if (dinfo->cfg.msi.msi_alloc > 0) { 3159 KASSERT(rid <= dinfo->cfg.msi.msi_alloc, 3160 ("MSI-X index too high")); 3161 if (dinfo->cfg.msi.msi_handlers == 0) 3162 return (EINVAL); 3163 dinfo->cfg.msi.msi_handlers--; 3164 if (dinfo->cfg.msi.msi_handlers == 0) 3165 pci_disable_msi(child); 3166 } else { 3167 KASSERT(dinfo->cfg.msix.msix_alloc > 0, 3168 ("No MSI or MSI-X interrupts allocated")); 3169 KASSERT(rid <= dinfo->cfg.msix.msix_table_len, 3170 ("MSI-X index too high")); 3171 mte = &dinfo->cfg.msix.msix_table[rid - 1]; 3172 if (mte->mte_handlers == 0) 3173 return (EINVAL); 3174 mte->mte_handlers--; 3175 if (mte->mte_handlers == 0) 3176 pci_mask_msix(child, rid - 1); 3177 } 3178 } 3179 error = bus_generic_teardown_intr(dev, child, irq, cookie); 3180 if (rid > 0) 3181 KASSERT(error == 0, 3182 ("%s: generic teardown failed for MSI/MSI-X", __func__)); 3183 return (error); 3184} 3185 3186int 3187pci_print_child(device_t dev, device_t child) 3188{ 3189 struct pci_devinfo *dinfo; 3190 struct resource_list *rl; 3191 int retval = 0; 3192 3193 dinfo = device_get_ivars(child); 3194 rl = &dinfo->resources; 3195 3196 retval += bus_print_child_header(dev, child); 3197 3198 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 3199 retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx"); 3200 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 3201 if (device_get_flags(dev)) 3202 retval += printf(" flags %#x", device_get_flags(dev)); 3203 3204 retval += printf(" at device %d.%d", pci_get_slot(child), 3205 pci_get_function(child)); 3206 3207 retval += bus_print_child_footer(dev, child); 3208 3209 return (retval); 3210} 3211 3212static struct 3213{ 3214 int class; 3215 int subclass; 3216 char *desc; 3217} pci_nomatch_tab[] = { 3218 {PCIC_OLD, -1, "old"}, 3219 {PCIC_OLD, PCIS_OLD_NONVGA, "non-VGA display device"}, 3220 {PCIC_OLD, PCIS_OLD_VGA, "VGA-compatible display device"}, 3221 {PCIC_STORAGE, -1, "mass storage"}, 3222 {PCIC_STORAGE, PCIS_STORAGE_SCSI, "SCSI"}, 3223 {PCIC_STORAGE, PCIS_STORAGE_IDE, "ATA"}, 3224 {PCIC_STORAGE, PCIS_STORAGE_FLOPPY, "floppy disk"}, 3225 {PCIC_STORAGE, PCIS_STORAGE_IPI, "IPI"}, 3226 {PCIC_STORAGE, PCIS_STORAGE_RAID, "RAID"}, 3227 {PCIC_STORAGE, PCIS_STORAGE_ATA_ADMA, "ATA (ADMA)"}, 3228 {PCIC_STORAGE, PCIS_STORAGE_SATA, "SATA"}, 3229 {PCIC_STORAGE, PCIS_STORAGE_SAS, "SAS"}, 3230 {PCIC_NETWORK, -1, "network"}, 3231 {PCIC_NETWORK, PCIS_NETWORK_ETHERNET, "ethernet"}, 3232 {PCIC_NETWORK, PCIS_NETWORK_TOKENRING, "token ring"}, 3233 {PCIC_NETWORK, PCIS_NETWORK_FDDI, "fddi"}, 3234 {PCIC_NETWORK, PCIS_NETWORK_ATM, "ATM"}, 3235 {PCIC_NETWORK, PCIS_NETWORK_ISDN, "ISDN"}, 3236 {PCIC_DISPLAY, -1, "display"}, 3237 {PCIC_DISPLAY, PCIS_DISPLAY_VGA, "VGA"}, 3238 {PCIC_DISPLAY, PCIS_DISPLAY_XGA, "XGA"}, 3239 {PCIC_DISPLAY, PCIS_DISPLAY_3D, "3D"}, 3240 {PCIC_MULTIMEDIA, -1, "multimedia"}, 3241 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_VIDEO, "video"}, 3242 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_AUDIO, "audio"}, 3243 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_TELE, "telephony"}, 3244 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_HDA, "HDA"}, 3245 {PCIC_MEMORY, -1, "memory"}, 3246 {PCIC_MEMORY, PCIS_MEMORY_RAM, "RAM"}, 3247 {PCIC_MEMORY, PCIS_MEMORY_FLASH, "flash"}, 3248 {PCIC_BRIDGE, -1, "bridge"}, 3249 {PCIC_BRIDGE, PCIS_BRIDGE_HOST, "HOST-PCI"}, 3250 {PCIC_BRIDGE, PCIS_BRIDGE_ISA, "PCI-ISA"}, 3251 {PCIC_BRIDGE, PCIS_BRIDGE_EISA, "PCI-EISA"}, 3252 {PCIC_BRIDGE, PCIS_BRIDGE_MCA, "PCI-MCA"}, 3253 {PCIC_BRIDGE, PCIS_BRIDGE_PCI, "PCI-PCI"}, 3254 {PCIC_BRIDGE, PCIS_BRIDGE_PCMCIA, "PCI-PCMCIA"}, 3255 {PCIC_BRIDGE, PCIS_BRIDGE_NUBUS, "PCI-NuBus"}, 3256 {PCIC_BRIDGE, PCIS_BRIDGE_CARDBUS, "PCI-CardBus"}, 3257 {PCIC_BRIDGE, PCIS_BRIDGE_RACEWAY, "PCI-RACEway"}, 3258 {PCIC_SIMPLECOMM, -1, "simple comms"}, 3259 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_UART, "UART"}, /* could detect 16550 */ 3260 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_PAR, "parallel port"}, 3261 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_MULSER, "multiport serial"}, 3262 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_MODEM, "generic modem"}, 3263 {PCIC_BASEPERIPH, -1, "base peripheral"}, 3264 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PIC, "interrupt controller"}, 3265 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_DMA, "DMA controller"}, 3266 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_TIMER, "timer"}, 3267 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_RTC, "realtime clock"}, 3268 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PCIHOT, "PCI hot-plug controller"}, 3269 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_SDHC, "SD host controller"}, 3270 {PCIC_INPUTDEV, -1, "input device"}, 3271 {PCIC_INPUTDEV, PCIS_INPUTDEV_KEYBOARD, "keyboard"}, 3272 {PCIC_INPUTDEV, PCIS_INPUTDEV_DIGITIZER,"digitizer"}, 3273 {PCIC_INPUTDEV, PCIS_INPUTDEV_MOUSE, "mouse"}, 3274 {PCIC_INPUTDEV, PCIS_INPUTDEV_SCANNER, "scanner"}, 3275 {PCIC_INPUTDEV, PCIS_INPUTDEV_GAMEPORT, "gameport"}, 3276 {PCIC_DOCKING, -1, "docking station"}, 3277 {PCIC_PROCESSOR, -1, "processor"}, 3278 {PCIC_SERIALBUS, -1, "serial bus"}, 3279 {PCIC_SERIALBUS, PCIS_SERIALBUS_FW, "FireWire"}, 3280 {PCIC_SERIALBUS, PCIS_SERIALBUS_ACCESS, "AccessBus"}, 3281 {PCIC_SERIALBUS, PCIS_SERIALBUS_SSA, "SSA"}, 3282 {PCIC_SERIALBUS, PCIS_SERIALBUS_USB, "USB"}, 3283 {PCIC_SERIALBUS, PCIS_SERIALBUS_FC, "Fibre Channel"}, 3284 {PCIC_SERIALBUS, PCIS_SERIALBUS_SMBUS, "SMBus"}, 3285 {PCIC_WIRELESS, -1, "wireless controller"}, 3286 {PCIC_WIRELESS, PCIS_WIRELESS_IRDA, "iRDA"}, 3287 {PCIC_WIRELESS, PCIS_WIRELESS_IR, "IR"}, 3288 {PCIC_WIRELESS, PCIS_WIRELESS_RF, "RF"}, 3289 {PCIC_INTELLIIO, -1, "intelligent I/O controller"}, 3290 {PCIC_INTELLIIO, PCIS_INTELLIIO_I2O, "I2O"}, 3291 {PCIC_SATCOM, -1, "satellite communication"}, 3292 {PCIC_SATCOM, PCIS_SATCOM_TV, "sat TV"}, 3293 {PCIC_SATCOM, PCIS_SATCOM_AUDIO, "sat audio"}, 3294 {PCIC_SATCOM, PCIS_SATCOM_VOICE, "sat voice"}, 3295 {PCIC_SATCOM, PCIS_SATCOM_DATA, "sat data"}, 3296 {PCIC_CRYPTO, -1, "encrypt/decrypt"}, 3297 {PCIC_CRYPTO, PCIS_CRYPTO_NETCOMP, "network/computer crypto"}, 3298 {PCIC_CRYPTO, PCIS_CRYPTO_ENTERTAIN, "entertainment crypto"}, 3299 {PCIC_DASP, -1, "dasp"}, 3300 {PCIC_DASP, PCIS_DASP_DPIO, "DPIO module"}, 3301 {0, 0, NULL} 3302}; 3303 3304void 3305pci_probe_nomatch(device_t dev, device_t child) 3306{ 3307 int i; 3308 char *cp, *scp, *device; 3309 3310 /* 3311 * Look for a listing for this device in a loaded device database. 3312 */ 3313 if ((device = pci_describe_device(child)) != NULL) { 3314 device_printf(dev, "<%s>", device); 3315 free(device, M_DEVBUF); 3316 } else { 3317 /* 3318 * Scan the class/subclass descriptions for a general 3319 * description. 3320 */ 3321 cp = "unknown"; 3322 scp = NULL; 3323 for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) { 3324 if (pci_nomatch_tab[i].class == pci_get_class(child)) { 3325 if (pci_nomatch_tab[i].subclass == -1) { 3326 cp = pci_nomatch_tab[i].desc; 3327 } else if (pci_nomatch_tab[i].subclass == 3328 pci_get_subclass(child)) { 3329 scp = pci_nomatch_tab[i].desc; 3330 } 3331 } 3332 } 3333 device_printf(dev, "<%s%s%s>", 3334 cp ? cp : "", 3335 ((cp != NULL) && (scp != NULL)) ? ", " : "", 3336 scp ? scp : ""); 3337 } 3338 printf(" at device %d.%d (no driver attached)\n", 3339 pci_get_slot(child), pci_get_function(child)); 3340 pci_cfg_save(child, device_get_ivars(child), 1); 3341 return; 3342} 3343 3344/* 3345 * Parse the PCI device database, if loaded, and return a pointer to a 3346 * description of the device. 3347 * 3348 * The database is flat text formatted as follows: 3349 * 3350 * Any line not in a valid format is ignored. 3351 * Lines are terminated with newline '\n' characters. 3352 * 3353 * A VENDOR line consists of the 4 digit (hex) vendor code, a TAB, then 3354 * the vendor name. 3355 * 3356 * A DEVICE line is entered immediately below the corresponding VENDOR ID. 3357 * - devices cannot be listed without a corresponding VENDOR line. 3358 * A DEVICE line consists of a TAB, the 4 digit (hex) device code, 3359 * another TAB, then the device name. 3360 */ 3361 3362/* 3363 * Assuming (ptr) points to the beginning of a line in the database, 3364 * return the vendor or device and description of the next entry. 3365 * The value of (vendor) or (device) inappropriate for the entry type 3366 * is set to -1. Returns nonzero at the end of the database. 3367 * 3368 * Note that this is slightly unrobust in the face of corrupt data; 3369 * we attempt to safeguard against this by spamming the end of the 3370 * database with a newline when we initialise. 3371 */ 3372static int 3373pci_describe_parse_line(char **ptr, int *vendor, int *device, char **desc) 3374{ 3375 char *cp = *ptr; 3376 int left; 3377 3378 *device = -1; 3379 *vendor = -1; 3380 **desc = '\0'; 3381 for (;;) { 3382 left = pci_vendordata_size - (cp - pci_vendordata); 3383 if (left <= 0) { 3384 *ptr = cp; 3385 return(1); 3386 } 3387 3388 /* vendor entry? */ 3389 if (*cp != '\t' && 3390 sscanf(cp, "%x\t%80[^\n]", vendor, *desc) == 2) 3391 break; 3392 /* device entry? */ 3393 if (*cp == '\t' && 3394 sscanf(cp, "%x\t%80[^\n]", device, *desc) == 2) 3395 break; 3396 3397 /* skip to next line */ 3398 while (*cp != '\n' && left > 0) { 3399 cp++; 3400 left--; 3401 } 3402 if (*cp == '\n') { 3403 cp++; 3404 left--; 3405 } 3406 } 3407 /* skip to next line */ 3408 while (*cp != '\n' && left > 0) { 3409 cp++; 3410 left--; 3411 } 3412 if (*cp == '\n' && left > 0) 3413 cp++; 3414 *ptr = cp; 3415 return(0); 3416} 3417 3418static char * 3419pci_describe_device(device_t dev) 3420{ 3421 int vendor, device; 3422 char *desc, *vp, *dp, *line; 3423 3424 desc = vp = dp = NULL; 3425 3426 /* 3427 * If we have no vendor data, we can't do anything. 3428 */ 3429 if (pci_vendordata == NULL) 3430 goto out; 3431 3432 /* 3433 * Scan the vendor data looking for this device 3434 */ 3435 line = pci_vendordata; 3436 if ((vp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL) 3437 goto out; 3438 for (;;) { 3439 if (pci_describe_parse_line(&line, &vendor, &device, &vp)) 3440 goto out; 3441 if (vendor == pci_get_vendor(dev)) 3442 break; 3443 } 3444 if ((dp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL) 3445 goto out; 3446 for (;;) { 3447 if (pci_describe_parse_line(&line, &vendor, &device, &dp)) { 3448 *dp = 0; 3449 break; 3450 } 3451 if (vendor != -1) { 3452 *dp = 0; 3453 break; 3454 } 3455 if (device == pci_get_device(dev)) 3456 break; 3457 } 3458 if (dp[0] == '\0') 3459 snprintf(dp, 80, "0x%x", pci_get_device(dev)); 3460 if ((desc = malloc(strlen(vp) + strlen(dp) + 3, M_DEVBUF, M_NOWAIT)) != 3461 NULL) 3462 sprintf(desc, "%s, %s", vp, dp); 3463 out: 3464 if (vp != NULL) 3465 free(vp, M_DEVBUF); 3466 if (dp != NULL) 3467 free(dp, M_DEVBUF); 3468 return(desc); 3469} 3470 3471int 3472pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 3473{ 3474 struct pci_devinfo *dinfo; 3475 pcicfgregs *cfg; 3476 3477 dinfo = device_get_ivars(child); 3478 cfg = &dinfo->cfg; 3479 3480 switch (which) { 3481 case PCI_IVAR_ETHADDR: 3482 /* 3483 * The generic accessor doesn't deal with failure, so 3484 * we set the return value, then return an error. 3485 */ 3486 *((uint8_t **) result) = NULL; 3487 return (EINVAL); 3488 case PCI_IVAR_SUBVENDOR: 3489 *result = cfg->subvendor; 3490 break; 3491 case PCI_IVAR_SUBDEVICE: 3492 *result = cfg->subdevice; 3493 break; 3494 case PCI_IVAR_VENDOR: 3495 *result = cfg->vendor; 3496 break; 3497 case PCI_IVAR_DEVICE: 3498 *result = cfg->device; 3499 break; 3500 case PCI_IVAR_DEVID: 3501 *result = (cfg->device << 16) | cfg->vendor; 3502 break; 3503 case PCI_IVAR_CLASS: 3504 *result = cfg->baseclass; 3505 break; 3506 case PCI_IVAR_SUBCLASS: 3507 *result = cfg->subclass; 3508 break; 3509 case PCI_IVAR_PROGIF: 3510 *result = cfg->progif; 3511 break; 3512 case PCI_IVAR_REVID: 3513 *result = cfg->revid; 3514 break; 3515 case PCI_IVAR_INTPIN: 3516 *result = cfg->intpin; 3517 break; 3518 case PCI_IVAR_IRQ: 3519 *result = cfg->intline; 3520 break; 3521 case PCI_IVAR_DOMAIN: 3522 *result = cfg->domain; 3523 break; 3524 case PCI_IVAR_BUS: 3525 *result = cfg->bus; 3526 break; 3527 case PCI_IVAR_SLOT: 3528 *result = cfg->slot; 3529 break; 3530 case PCI_IVAR_FUNCTION: 3531 *result = cfg->func; 3532 break; 3533 case PCI_IVAR_CMDREG: 3534 *result = cfg->cmdreg; 3535 break; 3536 case PCI_IVAR_CACHELNSZ: 3537 *result = cfg->cachelnsz; 3538 break; 3539 case PCI_IVAR_MINGNT: 3540 *result = cfg->mingnt; 3541 break; 3542 case PCI_IVAR_MAXLAT: 3543 *result = cfg->maxlat; 3544 break; 3545 case PCI_IVAR_LATTIMER: 3546 *result = cfg->lattimer; 3547 break; 3548 default: 3549 return (ENOENT); 3550 } 3551 return (0); 3552} 3553 3554int 3555pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 3556{ 3557 struct pci_devinfo *dinfo; 3558 3559 dinfo = device_get_ivars(child); 3560 3561 switch (which) { 3562 case PCI_IVAR_INTPIN: 3563 dinfo->cfg.intpin = value; 3564 return (0); 3565 case PCI_IVAR_ETHADDR: 3566 case PCI_IVAR_SUBVENDOR: 3567 case PCI_IVAR_SUBDEVICE: 3568 case PCI_IVAR_VENDOR: 3569 case PCI_IVAR_DEVICE: 3570 case PCI_IVAR_DEVID: 3571 case PCI_IVAR_CLASS: 3572 case PCI_IVAR_SUBCLASS: 3573 case PCI_IVAR_PROGIF: 3574 case PCI_IVAR_REVID: 3575 case PCI_IVAR_IRQ: 3576 case PCI_IVAR_DOMAIN: 3577 case PCI_IVAR_BUS: 3578 case PCI_IVAR_SLOT: 3579 case PCI_IVAR_FUNCTION: 3580 return (EINVAL); /* disallow for now */ 3581 3582 default: 3583 return (ENOENT); 3584 } 3585} 3586 3587 3588#include "opt_ddb.h" 3589#ifdef DDB 3590#include <ddb/ddb.h> 3591#include <sys/cons.h> 3592 3593/* 3594 * List resources based on pci map registers, used for within ddb 3595 */ 3596 3597DB_SHOW_COMMAND(pciregs, db_pci_dump) 3598{ 3599 struct pci_devinfo *dinfo; 3600 struct devlist *devlist_head; 3601 struct pci_conf *p; 3602 const char *name; 3603 int i, error, none_count; 3604 3605 none_count = 0; 3606 /* get the head of the device queue */ 3607 devlist_head = &pci_devq; 3608 3609 /* 3610 * Go through the list of devices and print out devices 3611 */ 3612 for (error = 0, i = 0, 3613 dinfo = STAILQ_FIRST(devlist_head); 3614 (dinfo != NULL) && (error == 0) && (i < pci_numdevs) && !db_pager_quit; 3615 dinfo = STAILQ_NEXT(dinfo, pci_links), i++) { 3616 3617 /* Populate pd_name and pd_unit */ 3618 name = NULL; 3619 if (dinfo->cfg.dev) 3620 name = device_get_name(dinfo->cfg.dev); 3621 3622 p = &dinfo->conf; 3623 db_printf("%s%d@pci%d:%d:%d:%d:\tclass=0x%06x card=0x%08x " 3624 "chip=0x%08x rev=0x%02x hdr=0x%02x\n", 3625 (name && *name) ? name : "none", 3626 (name && *name) ? (int)device_get_unit(dinfo->cfg.dev) : 3627 none_count++, 3628 p->pc_sel.pc_domain, p->pc_sel.pc_bus, p->pc_sel.pc_dev, 3629 p->pc_sel.pc_func, (p->pc_class << 16) | 3630 (p->pc_subclass << 8) | p->pc_progif, 3631 (p->pc_subdevice << 16) | p->pc_subvendor, 3632 (p->pc_device << 16) | p->pc_vendor, 3633 p->pc_revid, p->pc_hdr); 3634 } 3635} 3636#endif /* DDB */ 3637 3638static struct resource * 3639pci_reserve_map(device_t dev, device_t child, int type, int *rid, 3640 u_long start, u_long end, u_long count, u_int flags) 3641{ 3642 struct pci_devinfo *dinfo = device_get_ivars(child); 3643 struct resource_list *rl = &dinfo->resources; 3644 struct resource_list_entry *rle; 3645 struct resource *res; 3646 pci_addr_t map, testval; 3647 int mapsize; 3648 3649 /* 3650 * Weed out the bogons, and figure out how large the BAR/map 3651 * is. Bars that read back 0 here are bogus and unimplemented. 3652 * Note: atapci in legacy mode are special and handled elsewhere 3653 * in the code. If you have a atapci device in legacy mode and 3654 * it fails here, that other code is broken. 3655 */ 3656 res = NULL; 3657 pci_read_bar(child, *rid, &map, &testval); 3658 3659 /* Ignore a BAR with a base of 0. */ 3660 if ((*rid == PCIR_BIOS && pci_rombase(testval) == 0) || 3661 pci_mapbase(testval) == 0) 3662 goto out; 3663 3664 if (PCI_BAR_MEM(testval) || *rid == PCIR_BIOS) { 3665 if (type != SYS_RES_MEMORY) { 3666 if (bootverbose) 3667 device_printf(dev, 3668 "child %s requested type %d for rid %#x," 3669 " but the BAR says it is an memio\n", 3670 device_get_nameunit(child), type, *rid); 3671 goto out; 3672 } 3673 } else { 3674 if (type != SYS_RES_IOPORT) { 3675 if (bootverbose) 3676 device_printf(dev, 3677 "child %s requested type %d for rid %#x," 3678 " but the BAR says it is an ioport\n", 3679 device_get_nameunit(child), type, *rid); 3680 goto out; 3681 } 3682 } 3683 3684 /* 3685 * For real BARs, we need to override the size that 3686 * the driver requests, because that's what the BAR 3687 * actually uses and we would otherwise have a 3688 * situation where we might allocate the excess to 3689 * another driver, which won't work. 3690 * 3691 * Device ROM BARs use a different mask value. 3692 */ 3693 if (*rid == PCIR_BIOS) 3694 mapsize = pci_romsize(testval); 3695 else 3696 mapsize = pci_mapsize(testval); 3697 count = 1UL << mapsize; 3698 if (RF_ALIGNMENT(flags) < mapsize) 3699 flags = (flags & ~RF_ALIGNMENT_MASK) | RF_ALIGNMENT_LOG2(mapsize); 3700 if (PCI_BAR_MEM(testval) && (testval & PCIM_BAR_MEM_PREFETCH)) 3701 flags |= RF_PREFETCHABLE; 3702 3703 /* 3704 * Allocate enough resource, and then write back the 3705 * appropriate bar for that resource. 3706 */ 3707 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child, type, rid, 3708 start, end, count, flags & ~RF_ACTIVE); 3709 if (res == NULL) { 3710 device_printf(child, 3711 "%#lx bytes of rid %#x res %d failed (%#lx, %#lx).\n", 3712 count, *rid, type, start, end); 3713 goto out; 3714 } 3715 resource_list_add(rl, type, *rid, start, end, count); 3716 rle = resource_list_find(rl, type, *rid); 3717 if (rle == NULL) 3718 panic("pci_reserve_map: unexpectedly can't find resource."); 3719 rle->res = res; 3720 rle->start = rman_get_start(res); 3721 rle->end = rman_get_end(res); 3722 rle->count = count; 3723 rle->flags = RLE_RESERVED; 3724 if (bootverbose) 3725 device_printf(child, 3726 "Lazy allocation of %#lx bytes rid %#x type %d at %#lx\n", 3727 count, *rid, type, rman_get_start(res)); 3728 map = rman_get_start(res); 3729 pci_write_bar(child, *rid, map); 3730out:; 3731 return (res); 3732} 3733 3734 3735struct resource * 3736pci_alloc_resource(device_t dev, device_t child, int type, int *rid, 3737 u_long start, u_long end, u_long count, u_int flags) 3738{ 3739 struct pci_devinfo *dinfo = device_get_ivars(child); 3740 struct resource_list *rl = &dinfo->resources; 3741 struct resource_list_entry *rle; 3742 struct resource *res; 3743 pcicfgregs *cfg = &dinfo->cfg; 3744 3745 if (device_get_parent(child) != dev) 3746 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child, 3747 type, rid, start, end, count, flags)); 3748 3749 /* 3750 * Perform lazy resource allocation 3751 */ 3752 switch (type) { 3753 case SYS_RES_IRQ: 3754 /* 3755 * Can't alloc legacy interrupt once MSI messages have 3756 * been allocated. 3757 */ 3758 if (*rid == 0 && (cfg->msi.msi_alloc > 0 || 3759 cfg->msix.msix_alloc > 0)) 3760 return (NULL); 3761 3762 /* 3763 * If the child device doesn't have an interrupt 3764 * routed and is deserving of an interrupt, try to 3765 * assign it one. 3766 */ 3767 if (*rid == 0 && !PCI_INTERRUPT_VALID(cfg->intline) && 3768 (cfg->intpin != 0)) 3769 pci_assign_interrupt(dev, child, 0); 3770 break; 3771 case SYS_RES_IOPORT: 3772 case SYS_RES_MEMORY: 3773 /* Reserve resources for this BAR if needed. */ 3774 rle = resource_list_find(rl, type, *rid); 3775 if (rle == NULL) { 3776 res = pci_reserve_map(dev, child, type, rid, start, end, 3777 count, flags); 3778 if (res == NULL) 3779 return (NULL); 3780 } 3781 } 3782 return (resource_list_alloc(rl, dev, child, type, rid, 3783 start, end, count, flags)); 3784} 3785 3786int 3787pci_activate_resource(device_t dev, device_t child, int type, int rid, 3788 struct resource *r) 3789{ 3790 int error; 3791 3792 error = bus_generic_activate_resource(dev, child, type, rid, r); 3793 if (error) 3794 return (error); 3795 3796 /* Enable decoding in the command register when activating BARs. */ 3797 if (device_get_parent(child) == dev) { 3798 /* Device ROMs need their decoding explicitly enabled. */ 3799 if (rid == PCIR_BIOS) 3800 pci_write_config(child, rid, rman_get_start(r) | 3801 PCIM_BIOS_ENABLE, 4); 3802 switch (type) { 3803 case SYS_RES_IOPORT: 3804 case SYS_RES_MEMORY: 3805 error = PCI_ENABLE_IO(dev, child, type); 3806 break; 3807 } 3808 } 3809 return (error); 3810} 3811 3812int 3813pci_deactivate_resource(device_t dev, device_t child, int type, 3814 int rid, struct resource *r) 3815{ 3816 int error; 3817 3818 error = bus_generic_deactivate_resource(dev, child, type, rid, r); 3819 if (error) 3820 return (error); 3821 3822 /* Disable decoding for device ROMs. */ 3823 if (rid == PCIR_BIOS) 3824 pci_write_config(child, rid, rman_get_start(r), 4); 3825 return (0); 3826} 3827 3828void 3829pci_delete_child(device_t dev, device_t child) 3830{ 3831 struct resource_list_entry *rle; 3832 struct resource_list *rl; 3833 struct pci_devinfo *dinfo; 3834 3835 dinfo = device_get_ivars(child); 3836 rl = &dinfo->resources; 3837 3838 if (device_is_attached(child)) 3839 device_detach(child); 3840 3841 /* Turn off access to resources we're about to free */ 3842 pci_write_config(child, PCIR_COMMAND, pci_read_config(child, 3843 PCIR_COMMAND, 2) & ~(PCIM_CMD_MEMEN | PCIM_CMD_PORTEN), 2); 3844 3845 /* Free all allocated resources */ 3846 STAILQ_FOREACH(rle, rl, link) { 3847 if (rle->res) { 3848 if (rman_get_flags(rle->res) & RF_ACTIVE || 3849 resource_list_busy(rl, rle->type, rle->rid)) { 3850 pci_printf(&dinfo->cfg, 3851 "Resource still owned, oops. " 3852 "(type=%d, rid=%d, addr=%lx)\n", 3853 rle->type, rle->rid, 3854 rman_get_start(rle->res)); 3855 bus_release_resource(child, rle->type, rle->rid, 3856 rle->res); 3857 } 3858 resource_list_unreserve(rl, dev, child, rle->type, 3859 rle->rid); 3860 } 3861 } 3862 resource_list_free(rl); 3863 3864 device_delete_child(dev, child); 3865 pci_freecfg(dinfo); 3866} 3867 3868void 3869pci_delete_resource(device_t dev, device_t child, int type, int rid) 3870{ 3871 struct pci_devinfo *dinfo; 3872 struct resource_list *rl; 3873 struct resource_list_entry *rle; 3874 3875 if (device_get_parent(child) != dev) 3876 return; 3877 3878 dinfo = device_get_ivars(child); 3879 rl = &dinfo->resources; 3880 rle = resource_list_find(rl, type, rid); 3881 if (rle == NULL) 3882 return; 3883 3884 if (rle->res) { 3885 if (rman_get_flags(rle->res) & RF_ACTIVE || 3886 resource_list_busy(rl, type, rid)) { 3887 device_printf(dev, "delete_resource: " 3888 "Resource still owned by child, oops. " 3889 "(type=%d, rid=%d, addr=%lx)\n", 3890 type, rid, rman_get_start(rle->res)); 3891 return; 3892 } 3893 3894#ifndef __PCI_BAR_ZERO_VALID 3895 /* 3896 * If this is a BAR, clear the BAR so it stops 3897 * decoding before releasing the resource. 3898 */ 3899 switch (type) { 3900 case SYS_RES_IOPORT: 3901 case SYS_RES_MEMORY: 3902 pci_write_bar(child, rid, 0); 3903 break; 3904 } 3905#endif 3906 resource_list_unreserve(rl, dev, child, type, rid); 3907 } 3908 resource_list_delete(rl, type, rid); 3909} 3910 3911struct resource_list * 3912pci_get_resource_list (device_t dev, device_t child) 3913{ 3914 struct pci_devinfo *dinfo = device_get_ivars(child); 3915 3916 return (&dinfo->resources); 3917} 3918 3919uint32_t 3920pci_read_config_method(device_t dev, device_t child, int reg, int width) 3921{ 3922 struct pci_devinfo *dinfo = device_get_ivars(child); 3923 pcicfgregs *cfg = &dinfo->cfg; 3924 3925 return (PCIB_READ_CONFIG(device_get_parent(dev), 3926 cfg->bus, cfg->slot, cfg->func, reg, width)); 3927} 3928 3929void 3930pci_write_config_method(device_t dev, device_t child, int reg, 3931 uint32_t val, int width) 3932{ 3933 struct pci_devinfo *dinfo = device_get_ivars(child); 3934 pcicfgregs *cfg = &dinfo->cfg; 3935 3936 PCIB_WRITE_CONFIG(device_get_parent(dev), 3937 cfg->bus, cfg->slot, cfg->func, reg, val, width); 3938} 3939 3940int 3941pci_child_location_str_method(device_t dev, device_t child, char *buf, 3942 size_t buflen) 3943{ 3944 3945 snprintf(buf, buflen, "slot=%d function=%d", pci_get_slot(child), 3946 pci_get_function(child)); 3947 return (0); 3948} 3949 3950int 3951pci_child_pnpinfo_str_method(device_t dev, device_t child, char *buf, 3952 size_t buflen) 3953{ 3954 struct pci_devinfo *dinfo; 3955 pcicfgregs *cfg; 3956 3957 dinfo = device_get_ivars(child); 3958 cfg = &dinfo->cfg; 3959 snprintf(buf, buflen, "vendor=0x%04x device=0x%04x subvendor=0x%04x " 3960 "subdevice=0x%04x class=0x%02x%02x%02x", cfg->vendor, cfg->device, 3961 cfg->subvendor, cfg->subdevice, cfg->baseclass, cfg->subclass, 3962 cfg->progif); 3963 return (0); 3964} 3965 3966int 3967pci_assign_interrupt_method(device_t dev, device_t child) 3968{ 3969 struct pci_devinfo *dinfo = device_get_ivars(child); 3970 pcicfgregs *cfg = &dinfo->cfg; 3971 3972 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child, 3973 cfg->intpin)); 3974} 3975 3976static int 3977pci_modevent(module_t mod, int what, void *arg) 3978{ 3979 static struct cdev *pci_cdev; 3980 3981 switch (what) { 3982 case MOD_LOAD: 3983 STAILQ_INIT(&pci_devq); 3984 pci_generation = 0; 3985 pci_cdev = make_dev(&pcicdev, 0, UID_ROOT, GID_WHEEL, 0644, 3986 "pci"); 3987 pci_load_vendor_data(); 3988 break; 3989 3990 case MOD_UNLOAD: 3991 destroy_dev(pci_cdev); 3992 break; 3993 } 3994 3995 return (0); 3996} 3997 3998void 3999pci_cfg_restore(device_t dev, struct pci_devinfo *dinfo) 4000{ 4001 int i; 4002 4003 /* 4004 * Only do header type 0 devices. Type 1 devices are bridges, 4005 * which we know need special treatment. Type 2 devices are 4006 * cardbus bridges which also require special treatment. 4007 * Other types are unknown, and we err on the side of safety 4008 * by ignoring them. 4009 */ 4010 if ((dinfo->cfg.hdrtype & PCIM_HDRTYPE) != PCIM_HDRTYPE_NORMAL) 4011 return; 4012 4013 /* 4014 * Restore the device to full power mode. We must do this 4015 * before we restore the registers because moving from D3 to 4016 * D0 will cause the chip's BARs and some other registers to 4017 * be reset to some unknown power on reset values. Cut down 4018 * the noise on boot by doing nothing if we are already in 4019 * state D0. 4020 */ 4021 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) 4022 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 4023 for (i = 0; i < dinfo->cfg.nummaps; i++) 4024 pci_write_config(dev, PCIR_BAR(i), dinfo->cfg.bar[i], 4); 4025 pci_write_config(dev, PCIR_BIOS, dinfo->cfg.bios, 4); 4026 pci_write_config(dev, PCIR_COMMAND, dinfo->cfg.cmdreg, 2); 4027 pci_write_config(dev, PCIR_INTLINE, dinfo->cfg.intline, 1); 4028 pci_write_config(dev, PCIR_INTPIN, dinfo->cfg.intpin, 1); 4029 pci_write_config(dev, PCIR_MINGNT, dinfo->cfg.mingnt, 1); 4030 pci_write_config(dev, PCIR_MAXLAT, dinfo->cfg.maxlat, 1); 4031 pci_write_config(dev, PCIR_CACHELNSZ, dinfo->cfg.cachelnsz, 1); 4032 pci_write_config(dev, PCIR_LATTIMER, dinfo->cfg.lattimer, 1); 4033 pci_write_config(dev, PCIR_PROGIF, dinfo->cfg.progif, 1); 4034 pci_write_config(dev, PCIR_REVID, dinfo->cfg.revid, 1); 4035 4036 /* Restore MSI and MSI-X configurations if they are present. */ 4037 if (dinfo->cfg.msi.msi_location != 0) 4038 pci_resume_msi(dev); 4039 if (dinfo->cfg.msix.msix_location != 0) 4040 pci_resume_msix(dev); 4041} 4042 4043void 4044pci_cfg_save(device_t dev, struct pci_devinfo *dinfo, int setstate) 4045{ 4046 int i; 4047 uint32_t cls; 4048 int ps; 4049 4050 /* 4051 * Only do header type 0 devices. Type 1 devices are bridges, which 4052 * we know need special treatment. Type 2 devices are cardbus bridges 4053 * which also require special treatment. Other types are unknown, and 4054 * we err on the side of safety by ignoring them. Powering down 4055 * bridges should not be undertaken lightly. 4056 */ 4057 if ((dinfo->cfg.hdrtype & PCIM_HDRTYPE) != PCIM_HDRTYPE_NORMAL) 4058 return; 4059 for (i = 0; i < dinfo->cfg.nummaps; i++) 4060 dinfo->cfg.bar[i] = pci_read_config(dev, PCIR_BAR(i), 4); 4061 dinfo->cfg.bios = pci_read_config(dev, PCIR_BIOS, 4); 4062 4063 /* 4064 * Some drivers apparently write to these registers w/o updating our 4065 * cached copy. No harm happens if we update the copy, so do so here 4066 * so we can restore them. The COMMAND register is modified by the 4067 * bus w/o updating the cache. This should represent the normally 4068 * writable portion of the 'defined' part of type 0 headers. In 4069 * theory we also need to save/restore the PCI capability structures 4070 * we know about, but apart from power we don't know any that are 4071 * writable. 4072 */ 4073 dinfo->cfg.subvendor = pci_read_config(dev, PCIR_SUBVEND_0, 2); 4074 dinfo->cfg.subdevice = pci_read_config(dev, PCIR_SUBDEV_0, 2); 4075 dinfo->cfg.vendor = pci_read_config(dev, PCIR_VENDOR, 2); 4076 dinfo->cfg.device = pci_read_config(dev, PCIR_DEVICE, 2); 4077 dinfo->cfg.cmdreg = pci_read_config(dev, PCIR_COMMAND, 2); 4078 dinfo->cfg.intline = pci_read_config(dev, PCIR_INTLINE, 1); 4079 dinfo->cfg.intpin = pci_read_config(dev, PCIR_INTPIN, 1); 4080 dinfo->cfg.mingnt = pci_read_config(dev, PCIR_MINGNT, 1); 4081 dinfo->cfg.maxlat = pci_read_config(dev, PCIR_MAXLAT, 1); 4082 dinfo->cfg.cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1); 4083 dinfo->cfg.lattimer = pci_read_config(dev, PCIR_LATTIMER, 1); 4084 dinfo->cfg.baseclass = pci_read_config(dev, PCIR_CLASS, 1); 4085 dinfo->cfg.subclass = pci_read_config(dev, PCIR_SUBCLASS, 1); 4086 dinfo->cfg.progif = pci_read_config(dev, PCIR_PROGIF, 1); 4087 dinfo->cfg.revid = pci_read_config(dev, PCIR_REVID, 1); 4088 4089 /* 4090 * don't set the state for display devices, base peripherals and 4091 * memory devices since bad things happen when they are powered down. 4092 * We should (a) have drivers that can easily detach and (b) use 4093 * generic drivers for these devices so that some device actually 4094 * attaches. We need to make sure that when we implement (a) we don't 4095 * power the device down on a reattach. 4096 */ 4097 cls = pci_get_class(dev); 4098 if (!setstate) 4099 return; 4100 switch (pci_do_power_nodriver) 4101 { 4102 case 0: /* NO powerdown at all */ 4103 return; 4104 case 1: /* Conservative about what to power down */ 4105 if (cls == PCIC_STORAGE) 4106 return; 4107 /*FALLTHROUGH*/ 4108 case 2: /* Agressive about what to power down */ 4109 if (cls == PCIC_DISPLAY || cls == PCIC_MEMORY || 4110 cls == PCIC_BASEPERIPH) 4111 return; 4112 /*FALLTHROUGH*/ 4113 case 3: /* Power down everything */ 4114 break; 4115 } 4116 /* 4117 * PCI spec says we can only go into D3 state from D0 state. 4118 * Transition from D[12] into D0 before going to D3 state. 4119 */ 4120 ps = pci_get_powerstate(dev); 4121 if (ps != PCI_POWERSTATE_D0 && ps != PCI_POWERSTATE_D3) 4122 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 4123 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D3) 4124 pci_set_powerstate(dev, PCI_POWERSTATE_D3); 4125} 4126