pci_intr_fixup.c revision 1.27
1 /* $NetBSD: pci_intr_fixup.c,v 1.27 2003/10/27 04:10:43 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Copyright (c) 1999, by UCHIYAMA Yasushi 42 * All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. The name of the developer may NOT be used to endorse or promote products 50 * derived from this software without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 */ 64 65 /* 66 * PCI Interrupt Router support. 67 */ 68 69 #include <sys/cdefs.h> 70 __KERNEL_RCSID(0, "$NetBSD: pci_intr_fixup.c,v 1.27 2003/10/27 04:10:43 christos Exp $"); 71 72 #include "opt_pcibios.h" 73 74 #include <sys/param.h> 75 #include <sys/systm.h> 76 #include <sys/kernel.h> 77 #include <sys/malloc.h> 78 #include <sys/queue.h> 79 #include <sys/device.h> 80 81 #include <machine/bus.h> 82 #include <machine/intr.h> 83 84 #include <dev/pci/pcireg.h> 85 #include <dev/pci/pcivar.h> 86 #include <dev/pci/pcidevs.h> 87 88 #include <i386/pci/pci_intr_fixup.h> 89 #include <i386/pci/pcibios.h> 90 91 struct pciintr_link_map { 92 int link; 93 int clink; 94 int irq; 95 u_int16_t bitmap; 96 int fixup_stage; 97 SIMPLEQ_ENTRY(pciintr_link_map) list; 98 }; 99 100 pciintr_icu_tag_t pciintr_icu_tag; 101 pciintr_icu_handle_t pciintr_icu_handle; 102 103 #ifdef PCIBIOS_IRQS_HINT 104 int pcibios_irqs_hint = PCIBIOS_IRQS_HINT; 105 #endif 106 107 struct pciintr_link_map *pciintr_link_lookup __P((int)); 108 struct pciintr_link_map *pciintr_link_alloc __P((struct pcibios_intr_routing *, 109 int)); 110 struct pcibios_intr_routing *pciintr_pir_lookup __P((int, int)); 111 static int pciintr_bitmap_count_irq __P((int, int *)); 112 static int pciintr_bitmap_find_lowest_irq __P((int, int *)); 113 int pciintr_link_init __P((void)); 114 #ifdef PCIBIOS_INTR_GUESS 115 int pciintr_guess_irq __P((void)); 116 #endif 117 int pciintr_link_fixup __P((void)); 118 int pciintr_link_route __P((u_int16_t *)); 119 int pciintr_irq_release __P((u_int16_t *)); 120 int pciintr_header_fixup __P((pci_chipset_tag_t)); 121 void pciintr_do_header_fixup __P((pci_chipset_tag_t, pcitag_t, void*)); 122 123 SIMPLEQ_HEAD(, pciintr_link_map) pciintr_link_map_list; 124 125 const struct pciintr_icu_table { 126 pci_vendor_id_t piit_vendor; 127 pci_product_id_t piit_product; 128 int (*piit_init) __P((pci_chipset_tag_t, 129 bus_space_tag_t, pcitag_t, pciintr_icu_tag_t *, 130 pciintr_icu_handle_t *)); 131 } pciintr_icu_table[] = { 132 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82371MX, 133 piix_init }, 134 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82371AB_ISA, 135 piix_init }, 136 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82371FB_ISA, 137 piix_init }, 138 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82371SB_ISA, 139 piix_init }, 140 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82801BA_LPC, 141 piix_init }, 142 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82801BAM_LPC, 143 piix_init }, 144 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82801DB_LPC, 145 piix_init }, 146 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82801EB_LPC, 147 piix_init }, 148 149 { PCI_VENDOR_OPTI, PCI_PRODUCT_OPTI_82C558, 150 opti82c558_init }, 151 { PCI_VENDOR_OPTI, PCI_PRODUCT_OPTI_82C700, 152 opti82c700_init }, 153 154 { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_VT82C586_ISA, 155 via82c586_init }, 156 { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_VT82C596A, 157 via82c586_init }, 158 { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_VT82C686A_ISA, 159 via82c586_init }, 160 161 { PCI_VENDOR_SIS, PCI_PRODUCT_SIS_85C503, 162 sis85c503_init }, 163 164 { PCI_VENDOR_AMD, PCI_PRODUCT_AMD_PBC756_PMC, 165 amd756_init }, 166 167 { PCI_VENDOR_ALI, PCI_PRODUCT_ALI_M1543, 168 ali1543_init }, 169 170 { 0, 0, 171 NULL }, 172 }; 173 174 const struct pciintr_icu_table *pciintr_icu_lookup __P((pcireg_t)); 175 176 const struct pciintr_icu_table * 177 pciintr_icu_lookup(id) 178 pcireg_t id; 179 { 180 const struct pciintr_icu_table *piit; 181 182 for (piit = pciintr_icu_table; 183 piit->piit_init != NULL; 184 piit++) { 185 if (PCI_VENDOR(id) == piit->piit_vendor && 186 PCI_PRODUCT(id) == piit->piit_product) 187 return (piit); 188 } 189 190 return (NULL); 191 } 192 193 struct pciintr_link_map * 194 pciintr_link_lookup(link) 195 int link; 196 { 197 struct pciintr_link_map *l; 198 199 SIMPLEQ_FOREACH(l, &pciintr_link_map_list, list) { 200 if (l->link == link) 201 return (l); 202 } 203 204 return (NULL); 205 } 206 207 struct pciintr_link_map * 208 pciintr_link_alloc(pir, pin) 209 struct pcibios_intr_routing *pir; 210 int pin; 211 { 212 int link = pir->linkmap[pin].link, clink, irq; 213 struct pciintr_link_map *l, *lstart; 214 215 if (pciintr_icu_tag != NULL) { /* compatible PCI ICU found */ 216 /* 217 * Get the canonical link value for this entry. 218 */ 219 if (pciintr_icu_getclink(pciintr_icu_tag, pciintr_icu_handle, 220 link, &clink) != 0) { 221 /* 222 * ICU doesn't understand the link value. 223 * Just ignore this PIR entry. 224 */ 225 #ifdef DIAGNOSTIC 226 printf("pciintr_link_alloc: bus %d device %d: " 227 "link 0x%02x invalid\n", 228 pir->bus, PIR_DEVFUNC_DEVICE(pir->device), link); 229 #endif 230 return (NULL); 231 } 232 233 /* 234 * Check the link value by asking the ICU for the 235 * canonical link value. 236 * Also, determine if this PIRQ is mapped to an IRQ. 237 */ 238 if (pciintr_icu_get_intr(pciintr_icu_tag, pciintr_icu_handle, 239 clink, &irq) != 0) { 240 /* 241 * ICU doesn't understand the canonical link value. 242 * Just ignore this PIR entry. 243 */ 244 #ifdef DIAGNOSTIC 245 printf("pciintr_link_alloc: " 246 "bus %d device %d link 0x%02x: " 247 "PIRQ 0x%02x invalid\n", 248 pir->bus, PIR_DEVFUNC_DEVICE(pir->device), link, 249 clink); 250 #endif 251 return (NULL); 252 } 253 } 254 255 l = malloc(sizeof(*l), M_DEVBUF, M_NOWAIT); 256 if (l == NULL) 257 panic("pciintr_link_alloc"); 258 259 memset(l, 0, sizeof(*l)); 260 261 l->link = link; 262 l->bitmap = pir->linkmap[pin].bitmap; 263 if (pciintr_icu_tag != NULL) { /* compatible PCI ICU found */ 264 l->clink = clink; 265 l->irq = irq; /* maybe X86_PCI_INTERRUPT_LINE_NO_CONNECTION */ 266 } else { 267 l->clink = link; /* only for PCIBIOSVERBOSE diagnostic */ 268 l->irq = X86_PCI_INTERRUPT_LINE_NO_CONNECTION; 269 } 270 271 lstart = SIMPLEQ_FIRST(&pciintr_link_map_list); 272 if (lstart == NULL || lstart->link < l->link) 273 SIMPLEQ_INSERT_TAIL(&pciintr_link_map_list, l, list); 274 else 275 SIMPLEQ_INSERT_HEAD(&pciintr_link_map_list, l, list); 276 277 return (l); 278 } 279 280 struct pcibios_intr_routing * 281 pciintr_pir_lookup(bus, device) 282 int bus, device; 283 { 284 struct pcibios_intr_routing *pir; 285 int entry; 286 287 if (pcibios_pir_table == NULL) 288 return (NULL); 289 290 for (entry = 0; entry < pcibios_pir_table_nentries; entry++) { 291 pir = &pcibios_pir_table[entry]; 292 if (pir->bus == bus && 293 PIR_DEVFUNC_DEVICE(pir->device) == device) 294 return (pir); 295 } 296 297 return (NULL); 298 } 299 300 static int 301 pciintr_bitmap_count_irq(irq_bitmap, irqp) 302 int irq_bitmap, *irqp; 303 { 304 int i, bit, count = 0, irq = X86_PCI_INTERRUPT_LINE_NO_CONNECTION; 305 306 if (irq_bitmap != 0) { 307 for (i = 0, bit = 1; i < 16; i++, bit <<= 1) { 308 if (irq_bitmap & bit) { 309 irq = i; 310 count++; 311 } 312 } 313 } 314 *irqp = irq; 315 return (count); 316 } 317 318 static int 319 pciintr_bitmap_find_lowest_irq(irq_bitmap, irqp) 320 int irq_bitmap, *irqp; 321 { 322 int i, bit; 323 324 if (irq_bitmap != 0) { 325 for (i = 0, bit = 1; i < 16; i++, bit <<= 1) { 326 if (irq_bitmap & bit) { 327 *irqp = i; 328 return (1); /* found */ 329 } 330 } 331 } 332 return (0); /* not found */ 333 } 334 335 int 336 pciintr_link_init() 337 { 338 int entry, pin, link; 339 struct pcibios_intr_routing *pir; 340 struct pciintr_link_map *l; 341 342 if (pcibios_pir_table == NULL) { 343 /* No PIR table; can't do anything. */ 344 printf("pciintr_link_init: no PIR table\n"); 345 return (1); 346 } 347 348 SIMPLEQ_INIT(&pciintr_link_map_list); 349 350 for (entry = 0; entry < pcibios_pir_table_nentries; entry++) { 351 pir = &pcibios_pir_table[entry]; 352 for (pin = 0; pin < PCI_INTERRUPT_PIN_MAX; pin++) { 353 link = pir->linkmap[pin].link; 354 if (link == 0) { 355 /* No connection for this pin. */ 356 continue; 357 } 358 /* 359 * Multiple devices may be wired to the same 360 * interrupt; check to see if we've seen this 361 * one already. If not, allocate a new link 362 * map entry and stuff it in the map. 363 */ 364 l = pciintr_link_lookup(link); 365 if (l == NULL) { 366 (void) pciintr_link_alloc(pir, pin); 367 } else if (pir->linkmap[pin].bitmap != l->bitmap) { 368 /* 369 * violates PCI IRQ Routing Table Specification 370 */ 371 #ifdef DIAGNOSTIC 372 printf("pciintr_link_init: " 373 "bus %d device %d link 0x%02x: " 374 "bad irq bitmap 0x%04x, " 375 "should be 0x%04x\n", 376 pir->bus, PIR_DEVFUNC_DEVICE(pir->device), 377 link, pir->linkmap[pin].bitmap, l->bitmap); 378 #endif 379 /* safer value. */ 380 l->bitmap &= pir->linkmap[pin].bitmap; 381 /* XXX - or, should ignore this entry? */ 382 } 383 } 384 } 385 386 return (0); 387 } 388 389 #ifdef PCIBIOS_INTR_GUESS 390 /* 391 * No compatible PCI ICU found. 392 * Hopes the BIOS already setup the ICU. 393 */ 394 int 395 pciintr_guess_irq() 396 { 397 struct pciintr_link_map *l; 398 int irq, guessed = 0; 399 400 /* 401 * Stage 1: If only one IRQ is available for the link, use it. 402 */ 403 SIMPLEQ_FOREACH(l, &pciintr_link_map_list, list) { 404 if (l->irq != X86_PCI_INTERRUPT_LINE_NO_CONNECTION) 405 continue; 406 if (pciintr_bitmap_count_irq(l->bitmap, &irq) == 1) { 407 l->irq = irq; 408 l->fixup_stage = 1; 409 #ifdef PCIINTR_DEBUG 410 printf("pciintr_guess_irq (stage 1): " 411 "guessing PIRQ 0x%02x to be IRQ %d\n", 412 l->clink, l->irq); 413 #endif 414 guessed = 1; 415 } 416 } 417 418 return (guessed ? 0 : -1); 419 } 420 #endif /* PCIBIOS_INTR_GUESS */ 421 422 int 423 pciintr_link_fixup() 424 { 425 struct pciintr_link_map *l; 426 int irq; 427 u_int16_t pciirq = 0; 428 429 /* 430 * First stage: Attempt to connect PIRQs which aren't 431 * yet connected. 432 */ 433 SIMPLEQ_FOREACH(l, &pciintr_link_map_list, list) { 434 if (l->irq != X86_PCI_INTERRUPT_LINE_NO_CONNECTION) { 435 /* 436 * Interrupt is already connected. Don't do 437 * anything to it. 438 * In this case, l->fixup_stage == 0. 439 */ 440 pciirq |= 1 << l->irq; 441 #ifdef PCIINTR_DEBUG 442 printf("pciintr_link_fixup: PIRQ 0x%02x already " 443 "connected to IRQ %d\n", l->clink, l->irq); 444 #endif 445 continue; 446 } 447 /* 448 * Interrupt isn't connected. Attempt to assign it to an IRQ. 449 */ 450 #ifdef PCIINTR_DEBUG 451 printf("pciintr_link_fixup: PIRQ 0x%02x not connected", 452 l->clink); 453 #endif 454 /* 455 * Just do the easy case now; we'll defer the harder ones 456 * to Stage 2. 457 */ 458 if (pciintr_bitmap_count_irq(l->bitmap, &irq) == 1) { 459 l->irq = irq; 460 l->fixup_stage = 1; 461 pciirq |= 1 << irq; 462 #ifdef PCIINTR_DEBUG 463 printf(", assigning IRQ %d", l->irq); 464 #endif 465 } 466 #ifdef PCIINTR_DEBUG 467 printf("\n"); 468 #endif 469 } 470 471 /* 472 * Stage 2: Attempt to connect PIRQs which we didn't 473 * connect in Stage 1. 474 */ 475 SIMPLEQ_FOREACH(l, &pciintr_link_map_list, list) { 476 if (l->irq != X86_PCI_INTERRUPT_LINE_NO_CONNECTION) 477 continue; 478 if (pciintr_bitmap_find_lowest_irq(l->bitmap & pciirq, 479 &l->irq)) { 480 /* 481 * This IRQ is a valid PCI IRQ already 482 * connected to another PIRQ, and also an 483 * IRQ our PIRQ can use; connect it up! 484 */ 485 l->fixup_stage = 2; 486 #ifdef PCIINTR_DEBUG 487 printf("pciintr_link_fixup (stage 2): " 488 "assigning IRQ %d to PIRQ 0x%02x\n", 489 l->irq, l->clink); 490 #endif 491 } 492 } 493 494 #ifdef PCIBIOS_IRQS_HINT 495 /* 496 * Stage 3: The worst case. I need configuration hint that 497 * user supplied a mask for the PCI irqs 498 */ 499 SIMPLEQ_FOREACH(l, &pciintr_link_map_list, list) { 500 if (l->irq != X86_PCI_INTERRUPT_LINE_NO_CONNECTION) 501 continue; 502 if (pciintr_bitmap_find_lowest_irq( 503 l->bitmap & pcibios_irqs_hint, &l->irq)) { 504 l->fixup_stage = 3; 505 #ifdef PCIINTR_DEBUG 506 printf("pciintr_link_fixup (stage 3): " 507 "assigning IRQ %d to PIRQ 0x%02x\n", 508 l->irq, l->clink); 509 #endif 510 } 511 } 512 #endif /* PCIBIOS_IRQS_HINT */ 513 514 return (0); 515 } 516 517 int 518 pciintr_link_route(pciirq) 519 u_int16_t *pciirq; 520 { 521 struct pciintr_link_map *l; 522 int rv = 0; 523 524 *pciirq = 0; 525 526 SIMPLEQ_FOREACH(l, &pciintr_link_map_list, list) { 527 if (l->fixup_stage == 0) { 528 if (l->irq == X86_PCI_INTERRUPT_LINE_NO_CONNECTION) { 529 /* Appropriate interrupt was not found. */ 530 #ifdef DIAGNOSTIC 531 printf("pciintr_link_route: " 532 "PIRQ 0x%02x: no IRQ, try " 533 "\"options PCIBIOS_IRQS_HINT=0x%04x\"\n", 534 l->clink, 535 /* suggest irq 9/10/11, if possible */ 536 (l->bitmap & 0x0e00) ? (l->bitmap & 0x0e00) 537 : l->bitmap); 538 #endif 539 } else { 540 /* BIOS setting has no problem */ 541 #ifdef PCIINTR_DEBUG 542 printf("pciintr_link_route: " 543 "route of PIRQ 0x%02x -> " 544 "IRQ %d preserved BIOS setting\n", 545 l->clink, l->irq); 546 #endif 547 *pciirq |= (1 << l->irq); 548 } 549 continue; /* nothing to do. */ 550 } 551 552 if (pciintr_icu_set_intr(pciintr_icu_tag, pciintr_icu_handle, 553 l->clink, l->irq) != 0 || 554 pciintr_icu_set_trigger(pciintr_icu_tag, 555 pciintr_icu_handle, 556 l->irq, IST_LEVEL) != 0) { 557 printf("pciintr_link_route: route of PIRQ 0x%02x -> " 558 "IRQ %d failed\n", l->clink, l->irq); 559 rv = 1; 560 } else { 561 /* 562 * Succssfully routed interrupt. Mark this as 563 * a PCI interrupt. 564 */ 565 *pciirq |= (1 << l->irq); 566 } 567 } 568 569 return (rv); 570 } 571 572 int 573 pciintr_irq_release(pciirq) 574 u_int16_t *pciirq; 575 { 576 int i, bit; 577 578 for (i = 0, bit = 1; i < 16; i++, bit <<= 1) { 579 if ((*pciirq & bit) == 0) 580 (void) pciintr_icu_set_trigger(pciintr_icu_tag, 581 pciintr_icu_handle, i, IST_EDGE); 582 } 583 584 return (0); 585 } 586 587 int 588 pciintr_header_fixup(pc) 589 pci_chipset_tag_t pc; 590 { 591 PCIBIOS_PRINTV(("------------------------------------------\n")); 592 PCIBIOS_PRINTV((" device vendor product pin PIRQ IRQ stage\n")); 593 PCIBIOS_PRINTV(("------------------------------------------\n")); 594 pci_device_foreach(pc, pcibios_max_bus, pciintr_do_header_fixup, NULL); 595 PCIBIOS_PRINTV(("------------------------------------------\n")); 596 597 return (0); 598 } 599 600 void 601 pciintr_do_header_fixup(pc, tag, context) 602 pci_chipset_tag_t pc; 603 pcitag_t tag; 604 void *context; 605 { 606 struct pcibios_intr_routing *pir; 607 struct pciintr_link_map *l; 608 int pin, irq, link; 609 int bus, device, function; 610 pcireg_t intr, id; 611 612 pci_decompose_tag(pc, tag, &bus, &device, &function); 613 id = pci_conf_read(pc, tag, PCI_ID_REG); 614 615 intr = pci_conf_read(pc, tag, PCI_INTERRUPT_REG); 616 pin = PCI_INTERRUPT_PIN(intr); 617 irq = PCI_INTERRUPT_LINE(intr); 618 619 #if 0 620 if (pin == 0) { 621 /* 622 * No interrupt used. 623 */ 624 return; 625 } 626 #endif 627 628 pir = pciintr_pir_lookup(bus, device); 629 if (pir == NULL || (link = pir->linkmap[pin - 1].link) == 0) { 630 /* 631 * Interrupt not connected; no 632 * need to change. 633 */ 634 return; 635 } 636 637 l = pciintr_link_lookup(link); 638 if (l == NULL) { 639 #ifdef PCIINTR_DEBUG 640 /* 641 * No link map entry. 642 * Probably pciintr_icu_getclink() or pciintr_icu_get_intr() 643 * was failed. 644 */ 645 printf("pciintr_header_fixup: no entry for link 0x%02x " 646 "(%d:%d:%d:%c)\n", link, bus, device, function, 647 '@' + pin); 648 #endif 649 return; 650 } 651 652 #ifdef PCIBIOSVERBOSE 653 if (pcibiosverbose) { 654 printf("%03d:%02d:%d 0x%04x 0x%04x %c 0x%02x", 655 bus, device, function, PCI_VENDOR(id), PCI_PRODUCT(id), 656 '@' + pin, l->clink); 657 if (l->irq == X86_PCI_INTERRUPT_LINE_NO_CONNECTION) 658 printf(" -"); 659 else 660 printf(" %3d", l->irq); 661 printf(" %d ", l->fixup_stage); 662 } 663 #endif 664 665 /* 666 * IRQs 14 and 15 are reserved for PCI IDE interrupts; don't muck 667 * with them. 668 */ 669 if (irq == 14 || irq == 15) { 670 PCIBIOS_PRINTV((" WARNING: ignored\n")); 671 return; 672 } 673 674 if (l->irq == X86_PCI_INTERRUPT_LINE_NO_CONNECTION) { 675 /* Appropriate interrupt was not found. */ 676 if (pciintr_icu_tag == NULL && 677 irq != 0 && irq != X86_PCI_INTERRUPT_LINE_NO_CONNECTION) { 678 /* 679 * Do not print warning, 680 * if no compatible PCI ICU found, 681 * but the irq is already assigned by BIOS. 682 */ 683 PCIBIOS_PRINTV(("\n")); 684 } else { 685 PCIBIOS_PRINTV((" WARNING: missing IRQ\n")); 686 } 687 return; 688 } 689 690 if (l->irq == irq) { 691 /* don't have to reconfigure */ 692 PCIBIOS_PRINTV((" already assigned\n")); 693 return; 694 } 695 696 if (irq == 0 || irq == X86_PCI_INTERRUPT_LINE_NO_CONNECTION) { 697 PCIBIOS_PRINTV((" fixed up\n")); 698 } else { 699 /* routed by BIOS, but inconsistent */ 700 #ifdef PCIBIOS_INTR_FIXUP_FORCE 701 /* believe PCI IRQ Routing table */ 702 PCIBIOS_PRINTV((" WARNING: overriding irq %d\n", irq)); 703 #else 704 /* believe PCI Interrupt Configuration Register (default) */ 705 PCIBIOS_PRINTV((" WARNING: preserving irq %d\n", irq)); 706 return; 707 #endif 708 } 709 710 intr &= ~(PCI_INTERRUPT_LINE_MASK << PCI_INTERRUPT_LINE_SHIFT); 711 intr |= (l->irq << PCI_INTERRUPT_LINE_SHIFT); 712 pci_conf_write(pc, tag, PCI_INTERRUPT_REG, intr); 713 } 714 715 int 716 pci_intr_fixup(pc, iot, pciirq) 717 pci_chipset_tag_t pc; 718 bus_space_tag_t iot; 719 u_int16_t *pciirq; 720 { 721 const struct pciintr_icu_table *piit = NULL; 722 pcitag_t icutag; 723 pcireg_t icuid; 724 725 /* 726 * Attempt to initialize our PCI interrupt router. If 727 * the PIR Table is present in ROM, use the location 728 * specified by the PIR Table, and use the compat ID, 729 * if present. Otherwise, we have to look for the router 730 * ourselves (the PCI-ISA bridge). 731 * 732 * A number of buggy BIOS implementations leave the router 733 * entry as 000:00:0, which is typically not the correct 734 * device/function. If the router device address is set to 735 * this value, and the compatible router entry is undefined 736 * (zero is the correct value to indicate undefined), then we 737 * work on the basis it is most likely an error, and search 738 * the entire device-space of bus 0 (but obviously starting 739 * with 000:00:0, in case that really is the right one). 740 */ 741 if (pcibios_pir_header.signature != 0 && 742 (pcibios_pir_header.router_bus != 0 || 743 PIR_DEVFUNC_DEVICE(pcibios_pir_header.router_devfunc) != 0 || 744 PIR_DEVFUNC_FUNCTION(pcibios_pir_header.router_devfunc) != 0 || 745 pcibios_pir_header.compat_router != 0)) { 746 icutag = pci_make_tag(pc, pcibios_pir_header.router_bus, 747 PIR_DEVFUNC_DEVICE(pcibios_pir_header.router_devfunc), 748 PIR_DEVFUNC_FUNCTION(pcibios_pir_header.router_devfunc)); 749 icuid = pcibios_pir_header.compat_router; 750 if (icuid == 0 || 751 (piit = pciintr_icu_lookup(icuid)) == NULL) { 752 /* 753 * No compat ID, or don't know the compat ID? Read 754 * it from the configuration header. 755 */ 756 icuid = pci_conf_read(pc, icutag, PCI_ID_REG); 757 } 758 if (piit == NULL) 759 piit = pciintr_icu_lookup(icuid); 760 } else { 761 int device, maxdevs = pci_bus_maxdevs(pc, 0); 762 763 /* 764 * Search configuration space for a known interrupt 765 * router. 766 */ 767 for (device = 0; device < maxdevs; device++) { 768 const struct pci_quirkdata *qd; 769 int function, nfuncs; 770 pcireg_t bhlcr; 771 772 icutag = pci_make_tag(pc, 0, device, 0); 773 icuid = pci_conf_read(pc, icutag, PCI_ID_REG); 774 775 /* Invalid vendor ID value? */ 776 if (PCI_VENDOR(icuid) == PCI_VENDOR_INVALID) 777 continue; 778 /* XXX Not invalid, but we've done this ~forever. */ 779 if (PCI_VENDOR(icuid) == 0) 780 continue; 781 782 qd = pci_lookup_quirkdata(PCI_VENDOR(icuid), 783 PCI_PRODUCT(icuid)); 784 785 bhlcr = pci_conf_read(pc, icutag, PCI_BHLC_REG); 786 if (PCI_HDRTYPE_MULTIFN(bhlcr) || 787 (qd != NULL && 788 (qd->quirks & PCI_QUIRK_MULTIFUNCTION) != 0)) 789 nfuncs = 8; 790 else 791 nfuncs = 1; 792 793 for (function = 0; function < nfuncs; function++) { 794 icutag = pci_make_tag(pc, 0, device, function); 795 icuid = pci_conf_read(pc, icutag, PCI_ID_REG); 796 797 /* Invalid vendor ID value? */ 798 if (PCI_VENDOR(icuid) == PCI_VENDOR_INVALID) 799 continue; 800 /* Not invalid, but we've done this ~forever */ 801 if (PCI_VENDOR(icuid) == 0) 802 continue; 803 804 piit = pciintr_icu_lookup(icuid); 805 if (piit != NULL) 806 goto found; 807 } 808 } 809 810 /* 811 * Invalidate the ICU ID. If we failed to find the 812 * interrupt router (piit == NULL) we don't want to 813 * display a spurious device address below containing 814 * the product information of the last device we 815 * looked at. 816 */ 817 icuid = 0; 818 found:; 819 } 820 821 if (piit == NULL) { 822 printf("pci_intr_fixup: no compatible PCI ICU found"); 823 if (pcibios_pir_header.signature != 0 && icuid != 0) 824 printf(": ICU vendor 0x%04x product 0x%04x", 825 PCI_VENDOR(icuid), PCI_PRODUCT(icuid)); 826 printf("\n"); 827 #ifdef PCIBIOS_INTR_GUESS 828 if (pciintr_link_init()) 829 return (-1); /* non-fatal */ 830 if (pciintr_guess_irq()) 831 return (-1); /* non-fatal */ 832 if (pciintr_header_fixup(pc)) 833 return (1); /* fatal */ 834 return (0); /* success! */ 835 #else 836 return (-1); /* non-fatal */ 837 #endif 838 } 839 840 /* 841 * Initialize the PCI ICU. 842 */ 843 if ((*piit->piit_init)(pc, iot, icutag, &pciintr_icu_tag, 844 &pciintr_icu_handle) != 0) 845 return (-1); /* non-fatal */ 846 847 /* 848 * Initialize the PCI interrupt link map. 849 */ 850 if (pciintr_link_init()) 851 return (-1); /* non-fatal */ 852 853 /* 854 * Fix up the link->IRQ mappings. 855 */ 856 if (pciintr_link_fixup() != 0) 857 return (-1); /* non-fatal */ 858 859 /* 860 * Now actually program the PCI ICU with the new 861 * routing information. 862 */ 863 if (pciintr_link_route(pciirq) != 0) 864 return (1); /* fatal */ 865 866 /* 867 * Now that we've routed all of the PIRQs, rewrite the PCI 868 * configuration headers to reflect the new mapping. 869 */ 870 if (pciintr_header_fixup(pc) != 0) 871 return (1); /* fatal */ 872 873 /* 874 * Free any unused PCI IRQs for ISA devices. 875 */ 876 if (pciintr_irq_release(pciirq) != 0) 877 return (-1); /* non-fatal */ 878 879 /* 880 * All done! 881 */ 882 return (0); /* success! */ 883 } 884
Indexes created Wed Oct 15 16:09:53 GMT 2025