/* $OpenBSD: pci_intr_fixup.c,v 1.24 2002/05/30 15:52:09 mickey Exp $ */ /* $NetBSD: pci_intr_fixup.c,v 1.10 2000/08/10 21:18:27 soda Exp $ */ /* * Copyright (c) 2001 Michael Shalayeff * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Michael Shalayeff. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ /*- * Copyright (c) 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1999, by UCHIYAMA Yasushi * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. The name of the developer may NOT be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * PCI Interrupt Router support. */ #include #include #include #include #include #include #include #include #include #include #include #include #include struct pciintr_link_map { int link, clink, irq, fixup_stage; u_int16_t bitmap; SIMPLEQ_ENTRY(pciintr_link_map) list; }; pciintr_icu_tag_t pciintr_icu_tag = NULL; pciintr_icu_handle_t pciintr_icu_handle; #ifdef PCIBIOS_IRQS_HINT int pcibios_irqs_hint = PCIBIOS_IRQS_HINT; #endif struct pciintr_link_map *pciintr_link_lookup(int); struct pcibios_intr_routing *pciintr_pir_lookup(int, int); int pciintr_bitmap_count_irq(int, int *); SIMPLEQ_HEAD(, pciintr_link_map) pciintr_link_map_list; const struct pciintr_icu_table { pci_vendor_id_t piit_vendor; pci_product_id_t piit_product; int (*piit_init)(pci_chipset_tag_t, bus_space_tag_t, pcitag_t, pciintr_icu_tag_t *, pciintr_icu_handle_t *); } pciintr_icu_table[] = { { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82371MX, piix_init }, { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82371AB_ISA, piix_init }, { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82371FB_ISA, piix_init }, { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82371SB_ISA, piix_init }, { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82801AA_LPC, piix_init }, { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82801BA_LPC, piix_init }, { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82801BAM_LPC, piix_init }, { PCI_VENDOR_OPTI, PCI_PRODUCT_OPTI_82C558, opti82c558_init }, { PCI_VENDOR_OPTI, PCI_PRODUCT_OPTI_82C700, opti82c700_init }, { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_VT82C596A, via82c586_init, }, { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_VT82C586_ISA, via82c586_init, }, { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_VT82C686A_ISA, via82c586_init, }, { PCI_VENDOR_SIS, PCI_PRODUCT_SIS_85C503, sis85c503_init }, { PCI_VENDOR_AMD, PCI_PRODUCT_AMD_PBC756_PMC, amd756_init }, { PCI_VENDOR_AMD, PCI_PRODUCT_AMD_766_ISA, amd756_init }, { PCI_VENDOR_ALI, PCI_PRODUCT_ALI_M1543, ali1543_init }, { 0, 0, NULL }, }; const struct pciintr_icu_table *pciintr_icu_lookup(pcireg_t); const struct pciintr_icu_table * pciintr_icu_lookup(id) pcireg_t id; { const struct pciintr_icu_table *piit; for (piit = pciintr_icu_table; piit->piit_init != NULL; piit++) if (PCI_VENDOR(id) == piit->piit_vendor && PCI_PRODUCT(id) == piit->piit_product) return (piit); return (NULL); } struct pciintr_link_map * pciintr_link_lookup(link) int link; { struct pciintr_link_map *l; for (l = SIMPLEQ_FIRST(&pciintr_link_map_list); l != NULL; l = SIMPLEQ_NEXT(l, list)) if (l->link == link) return (l); return (NULL); } static __inline struct pciintr_link_map * pciintr_link_alloc(pci_chipset_tag_t pc, struct pcibios_intr_routing *pir, int pin) { int link = pir->linkmap[pin].link, clink, irq; struct pciintr_link_map *l, *lstart; if (pciintr_icu_tag != NULL) { /* * Get the canonical link value for this entry. */ if (pciintr_icu_getclink(pciintr_icu_tag, pciintr_icu_handle, link, &clink) != 0) { /* * ICU doesn't understand the link value. * Just ignore this PIR entry. */ PCIBIOS_PRINTV(("pciintr_link_alloc: bus %d device %d: " "ignoring link 0x%02x\n", pir->bus, PIR_DEVFUNC_DEVICE(pir->device), link)); return (NULL); } /* * Check the link value by asking the ICU for the * canonical link value. * Also, determine if this PIRQ is mapped to an IRQ. */ if (pciintr_icu_get_intr(pciintr_icu_tag, pciintr_icu_handle, clink, &irq) != 0) { /* * ICU doesn't understand the canonical link value. * Just ignore this PIR entry. */ PCIBIOS_PRINTV(("pciintr_link_alloc: " "bus %d device %d link 0x%02x: " "ignoring PIRQ 0x%02x\n", pir->bus, PIR_DEVFUNC_DEVICE(pir->device), link, clink)); return (NULL); } } if ((l = malloc(sizeof(*l), M_DEVBUF, M_NOWAIT)) == NULL) return (NULL); memset(l, 0, sizeof(*l)); l->link = link; l->bitmap = pir->linkmap[pin].bitmap; if (pciintr_icu_tag != NULL) { /* compatible PCI ICU found */ l->clink = clink; l->irq = irq; /* maybe I386_PCI_INTERRUPT_LINE_NO_CONNECTION */ } else { l->clink = link; l->irq = I386_PCI_INTERRUPT_LINE_NO_CONNECTION; } lstart = SIMPLEQ_FIRST(&pciintr_link_map_list); if (lstart == NULL || lstart->link < l->link) SIMPLEQ_INSERT_TAIL(&pciintr_link_map_list, l, list); else SIMPLEQ_INSERT_HEAD(&pciintr_link_map_list, l, list); return (l); } struct pcibios_intr_routing * pciintr_pir_lookup(bus, device) int bus, device; { struct pcibios_intr_routing *pir; int entry; if (pcibios_pir_table == NULL) return (NULL); for (entry = 0; entry < pcibios_pir_table_nentries; entry++) { pir = &pcibios_pir_table[entry]; if (pir->bus == bus && PIR_DEVFUNC_DEVICE(pir->device) == device) return (pir); } return (NULL); } int pciintr_bitmap_count_irq(irq_bitmap, irqp) int irq_bitmap, *irqp; { int i, bit, count = 0, irq = I386_PCI_INTERRUPT_LINE_NO_CONNECTION; if (irq_bitmap != 0) for (i = 0, bit = 1; i < 16; i++, bit <<= 1) if (irq_bitmap & bit) { irq = i; count++; } *irqp = irq; return (count); } static __inline int pciintr_link_init(pci_chipset_tag_t pc) { int entry, pin, link; struct pcibios_intr_routing *pir; struct pciintr_link_map *l; if (pcibios_pir_table == NULL) { /* No PIR table; can't do anything. */ printf("pciintr_link_init: no PIR table\n"); return (1); } SIMPLEQ_INIT(&pciintr_link_map_list); for (entry = 0; entry < pcibios_pir_table_nentries; entry++) { pir = &pcibios_pir_table[entry]; for (pin = 0; pin < PCI_INTERRUPT_PIN_MAX; pin++) { if ((link = pir->linkmap[pin].link) == 0) /* No connection for this pin. */ continue; /* * Multiple devices may be wired to the same * interrupt; check to see if we've seen this * one already. If not, allocate a new link * map entry and stuff it in the map. */ if ((l = pciintr_link_lookup(link)) == NULL) pciintr_link_alloc(pc, pir, pin); else if (pir->linkmap[pin].bitmap != l->bitmap) { /* * violates PCI IRQ Routing Table Specification */ PCIBIOS_PRINTV(("pciintr_link_init: " "bus %d device %d link 0x%02x: " "bad irq bitmap 0x%04x, " "should be 0x%04x\n", pir->bus, PIR_DEVFUNC_DEVICE(pir->device), link, pir->linkmap[pin].bitmap, l->bitmap)); /* safer value. */ l->bitmap &= pir->linkmap[pin].bitmap; /* XXX - or, should ignore this entry? */ } } } return (0); } /* * No compatible PCI ICU found. * Hopes the BIOS already setup the ICU. */ static __inline int pciintr_guess_irq(void) { struct pciintr_link_map *l; int irq, guessed = 0; /* * Stage 1: If only one IRQ is available for the link, use it. */ for (l = SIMPLEQ_FIRST(&pciintr_link_map_list); l != NULL; l = SIMPLEQ_NEXT(l, list)) { if (l->irq != I386_PCI_INTERRUPT_LINE_NO_CONNECTION) continue; if (pciintr_bitmap_count_irq(l->bitmap, &irq) == 1) { l->irq = irq; l->fixup_stage = 1; if (pcibios_flags & PCIBIOS_INTRDEBUG) printf("pciintr_guess_irq (stage 1): " "guessing PIRQ 0x%02x to be IRQ %d\n", l->clink, l->irq); guessed = 1; } } return (guessed ? 0 : -1); } static __inline int pciintr_link_fixup(void) { struct pciintr_link_map *l; u_int16_t pciirq = 0; int irq; /* * First stage: Attempt to connect PIRQs which aren't * yet connected. */ for (l = SIMPLEQ_FIRST(&pciintr_link_map_list); l != NULL; l = SIMPLEQ_NEXT(l, list)) { if (l->irq != I386_PCI_INTERRUPT_LINE_NO_CONNECTION) { /* * Interrupt is already connected. Don't do * anything to it. * In this case, l->fixup_stage == 0. */ pciirq |= 1 << l->irq; if (pcibios_flags & PCIBIOS_INTRDEBUG) printf("pciintr_link_fixup: PIRQ 0x%02x is " "already connected to IRQ %d\n", l->clink, l->irq); continue; } /* * Interrupt isn't connected. Attempt to assign it to an IRQ. */ if (pcibios_flags & PCIBIOS_INTRDEBUG) printf("pciintr_link_fixup: PIRQ 0x%02x not connected", l->clink); /* * Just do the easy case now; we'll defer the harder ones * to Stage 2. */ if (pciintr_bitmap_count_irq(l->bitmap, &irq) == 1) { l->irq = irq; l->fixup_stage = 1; pciirq |= 1 << irq; if (pcibios_flags & PCIBIOS_INTRDEBUG) printf(", assigning IRQ %d", l->irq); } if (pcibios_flags & PCIBIOS_INTRDEBUG) printf("\n"); } /* * Stage 2: Attempt to connect PIRQs which we didn't * connect in Stage 1. */ for (l = SIMPLEQ_FIRST(&pciintr_link_map_list); l != NULL; l = SIMPLEQ_NEXT(l, list)) if (l->irq == I386_PCI_INTERRUPT_LINE_NO_CONNECTION && (irq = ffs(l->bitmap & pciirq)) > 0) { /* * This IRQ is a valid PCI IRQ already * connected to another PIRQ, and also an * IRQ our PIRQ can use; connect it up! */ l->fixup_stage = 2; l->irq = irq - 1; if (pcibios_flags & PCIBIOS_INTRDEBUG) printf("pciintr_link_fixup (stage 2): " "assigning IRQ %d to PIRQ 0x%02x\n", l->irq, l->clink); } #ifdef PCIBIOS_IRQS_HINT /* * Stage 3: The worst case. I need configuration hint that * user supplied a mask for the PCI irqs */ for (l = SIMPLEQ_FIRST(&pciintr_link_map_list); l != NULL; l = SIMPLEQ_NEXT(l, list)) { if (l->irq == I386_PCI_INTERRUPT_LINE_NO_CONNECTION && (irq = ffs(l->bitmap & pcibios_irqs_hint)) > 0) { l->fixup_stage = 3; l->irq = irq - 1; if (pcibios_flags & PCIBIOS_INTRDEBUG) printf("pciintr_link_fixup (stage 3): " "assigning IRQ %d to PIRQ 0x%02x\n", l->irq, l->clink); } } #endif /* PCIBIOS_IRQS_HINT */ if (pcibios_flags & PCIBIOS_INTRDEBUG) printf("pciintr_link_fixup: piirq 0x%04x\n", pciirq); return (0); } int pci_intr_route_link(pc, ihp) pci_chipset_tag_t pc; pci_intr_handle_t *ihp; { struct pciintr_link_map *l; pcireg_t intr; int rv = 1; char *p = NULL; if (pcibios_flags & PCIBIOS_INTR_FIXUP) return 1; if (ihp->line != 0 && ihp->line != I386_PCI_INTERRUPT_LINE_NO_CONNECTION) pcibios_pir_header.exclusive_irq |= (1 << ihp->line); l = ihp->link; if (!l || pciintr_icu_tag == NULL) return (1); if (l->fixup_stage == 0) { if (l->irq == I386_PCI_INTERRUPT_LINE_NO_CONNECTION) { /* Appropriate interrupt was not found. */ if (pcibios_flags & PCIBIOS_INTRDEBUG) printf("pci_intr_route_link: PIRQ 0x%02x: " "no IRQ, try " "\"option PCIBIOS_IRQS_HINT=0x%04x\"\n", l->clink, /* suggest irq 9/10/11, if possible */ (l->bitmap & 0x0e00) ? (l->bitmap & 0x0e00) : l->bitmap); } else p = " preserved BIOS setting"; } else { if (pciintr_icu_set_intr(pciintr_icu_tag, pciintr_icu_handle, l->clink, l->irq) != 0 || pciintr_icu_set_trigger(pciintr_icu_tag, pciintr_icu_handle, l->irq, IST_LEVEL) != 0) { p = " failed"; rv = 0; } else p = ""; } if (p && pcibios_flags & PCIBIOS_INTRDEBUG) printf("pci_intr_route_link: route PIRQ 0x%02x -> IRQ %d%s\n", l->clink, l->irq, p); if (!rv) return (0); /* * IRQs 14 and 15 are reserved for PCI IDE interrupts; don't muck * with them. */ if (ihp->line == 14 || ihp->line == 15) return (1); intr = pci_conf_read(pc, ihp->tag, PCI_INTERRUPT_REG); if (ihp->line != PCI_INTERRUPT_LINE(intr)) { intr &= ~(PCI_INTERRUPT_LINE_MASK << PCI_INTERRUPT_LINE_SHIFT); intr |= (ihp->line << PCI_INTERRUPT_LINE_SHIFT); pci_conf_write(pc, ihp->tag, PCI_INTERRUPT_REG, intr); } return (1); } int pci_intr_post_fixup() { struct pciintr_link_map *l; int i, pciirq; if (pcibios_flags & PCIBIOS_INTR_FIXUP) return 1; if (!pciintr_icu_handle) return 0; pciirq = pcibios_pir_header.exclusive_irq; if (pcibios_flags & PCIBIOS_INTRDEBUG) printf("pci_intr_post_fixup: PCI IRQs:"); for (l = SIMPLEQ_FIRST(&pciintr_link_map_list); l != NULL; l = SIMPLEQ_NEXT(l, list)) if (l->fixup_stage == 0 && l->irq != 0 && l->irq != I386_PCI_INTERRUPT_LINE_NO_CONNECTION) { if (pcibios_flags & PCIBIOS_INTRDEBUG) printf(" %d", l->irq); pciirq |= (1 << l->irq); } if (pcibios_flags & PCIBIOS_INTRDEBUG) printf("; ISA IRQs:"); for (i = 0; i < 16; i++) if (!(pciirq & (1 << i))) { if (pcibios_flags & PCIBIOS_INTRDEBUG) printf(" %d", i); pciintr_icu_set_trigger(pciintr_icu_tag, pciintr_icu_handle, i, IST_EDGE); } if (pcibios_flags & PCIBIOS_INTRDEBUG) printf("\n"); return (0); } int pci_intr_header_fixup(pc, tag, ihp) pci_chipset_tag_t pc; pcitag_t tag; pci_intr_handle_t *ihp; { struct pcibios_intr_routing *pir; struct pciintr_link_map *l; int irq, link, bus, device, function; char *p = NULL; if (pcibios_flags & PCIBIOS_INTR_FIXUP) return 1; irq = ihp->line; ihp->link = NULL; ihp->tag = tag; pci_decompose_tag(pc, tag, &bus, &device, &function); if ((pir = pciintr_pir_lookup(bus, device)) == NULL || (link = pir->linkmap[ihp->pin - 1].link) == 0) { PCIBIOS_PRINTV(("Interrupt not connected; no need to change.")); return 1; } if ((l = pciintr_link_lookup(link)) == NULL) { /* * No link map entry. * Probably pciintr_icu_getclink() or pciintr_icu_get_intr() * was failed. */ if (pcibios_flags & PCIBIOS_INTRDEBUG) printf("pci_intr_header_fixup: no entry for link " "0x%02x (%d:%d:%d:%c)\n", link, bus, device, function, '@' + ihp->pin); return 1; } ihp->link = l; if (irq == 14 || irq == 15) p = " WARNING: ignored"; else if (l->irq == I386_PCI_INTERRUPT_LINE_NO_CONNECTION) { /* Appropriate interrupt was not found. */ if (pciintr_icu_tag == NULL && ihp->line != 0 && ihp->line != I386_PCI_INTERRUPT_LINE_NO_CONNECTION) /* * Do not print warning, * if no compatible PCI ICU found, * but the irq is already assigned by BIOS. */ p = ""; else p = " WARNING: missing"; } else if (irq == 0 || irq == I386_PCI_INTERRUPT_LINE_NO_CONNECTION) { p = " fixed up"; ihp->line = l->irq; } else { /* routed by BIOS, but inconsistent */ #ifdef PCIBIOS_INTR_FIXUP_FORCE /* believe PCI IRQ Routing table */ p = " WARNING: overriding"; ihp->line = l->irq; #else /* believe PCI Interrupt Configuration Register (default) */ p = " WARNING: preserving"; #endif } if (pcibios_flags & PCIBIOS_INTRDEBUG) { register pcireg_t id = pci_conf_read(pc, tag, PCI_ID_REG); printf("%d:%d:%d %04x:%04x pin %c clink 0x%02x irq %d stage %d" "%s irq %d\n", bus, device, function, PCI_VENDOR(id), PCI_PRODUCT(id), '@' + ihp->pin, l->clink, ((l->irq == I386_PCI_INTERRUPT_LINE_NO_CONNECTION)? -1 : l->irq), l->fixup_stage, p, irq); } return (1); } int pci_intr_fixup(sc, pc, iot) struct pcibios_softc *sc; pci_chipset_tag_t pc; bus_space_tag_t iot; { struct pcibios_pir_header *pirh = &pcibios_pir_header; const struct pciintr_icu_table *piit = NULL; pcitag_t icutag; /* * Attempt to initialize our PCI interrupt router. If * the PIR Table is present in ROM, use the location * specified by the PIR Table, and use the compat ID, * if present. Otherwise, we have to look for the router * ourselves (the PCI-ISA bridge). * * A number of buggy BIOS implementations leave the router * entry as 000:00:0, which is typically not the correct * device/function. If the router device address is set to * this value, and the compatible router entry is undefined * (zero is the correct value to indicate undefined), then we * work on the basis it is most likely an error, and search * the entire device-space of bus 0 (but obviously starting * with 000:00:0, in case that really is the right one). */ if (pirh->signature != 0 && (pirh->router_bus != 0 || pirh->router_devfunc != 0 || pirh->compat_router != 0)) { icutag = pci_make_tag(pc, pirh->router_bus, PIR_DEVFUNC_DEVICE(pirh->router_devfunc), PIR_DEVFUNC_FUNCTION(pirh->router_devfunc)); if (pirh->compat_router == 0 || (piit = pciintr_icu_lookup(pirh->compat_router)) == NULL) { /* * No compat ID, or don't know the compat ID? Read * it from the configuration header. */ pirh->compat_router = pci_conf_read(pc, icutag, PCI_ID_REG); } if (piit == NULL) piit = pciintr_icu_lookup(pirh->compat_router); } else { int device, maxdevs = pci_bus_maxdevs(pc, 0); /* * Search configuration space for a known interrupt * router. */ for (device = 0; device < maxdevs; device++) { const struct pci_quirkdata *qd; int function, nfuncs; pcireg_t icuid; pcireg_t bhlcr; icutag = pci_make_tag(pc, 0, device, 0); icuid = pci_conf_read(pc, icutag, PCI_ID_REG); /* Invalid vendor ID value? */ if (PCI_VENDOR(icuid) == PCI_VENDOR_INVALID) continue; /* XXX Not invalid, but we've done this ~forever. */ if (PCI_VENDOR(icuid) == 0) continue; qd = pci_lookup_quirkdata(PCI_VENDOR(icuid), PCI_PRODUCT(icuid)); bhlcr = pci_conf_read(pc, icutag, PCI_BHLC_REG); if (PCI_HDRTYPE_MULTIFN(bhlcr) || (qd != NULL && (qd->quirks & PCI_QUIRK_MULTIFUNCTION) != 0)) nfuncs = 8; else nfuncs = 1; for (function = 0; function < nfuncs; function++) { icutag = pci_make_tag(pc, 0, device, function); icuid = pci_conf_read(pc, icutag, PCI_ID_REG); /* Invalid vendor ID value? */ if (PCI_VENDOR(icuid) == PCI_VENDOR_INVALID) continue; /* Not invalid, but we've done this ~forever. */ if (PCI_VENDOR(icuid) == 0) continue; if ((piit = pciintr_icu_lookup(icuid))) { pirh->compat_router = icuid; pirh->router_bus = 0; pirh->router_devfunc = PIR_DEVFUNC_COMPOSE(device, 0); break; } } if (piit != NULL) break; } } if (piit == NULL) { printf("%s: no compatible PCI ICU found", sc->sc_dev.dv_xname); if (pirh->signature != 0 && pirh->compat_router != 0) printf(": ICU vendor 0x%04x product 0x%04x", PCI_VENDOR(pirh->compat_router), PCI_PRODUCT(pirh->compat_router)); printf("\n"); if (!(pcibios_flags & PCIBIOS_INTR_GUESS)) { if (pciintr_link_init(pc)) return (-1); /* non-fatal */ if (pciintr_guess_irq()) return (-1); /* non-fatal */ return (0); /* success! */ } else return (-1); /* non-fatal */ } else { char devinfo[256]; printf("%s: PCI Interrupt Router at %03d:%02d:%01d", sc->sc_dev.dv_xname, pirh->router_bus, PIR_DEVFUNC_DEVICE(pirh->router_devfunc), PIR_DEVFUNC_FUNCTION(pirh->router_devfunc)); if (pirh->compat_router != 0) { pci_devinfo(pirh->compat_router, 0, 0, devinfo); printf(" (%s)", devinfo); } printf("\n"); } /* * Initialize the PCI ICU. */ if ((*piit->piit_init)(pc, iot, icutag, &pciintr_icu_tag, &pciintr_icu_handle) != 0) return (-1); /* non-fatal */ /* * Initialize the PCI interrupt link map. */ if (pciintr_link_init(pc)) return (-1); /* non-fatal */ /* * Fix up the link->IRQ mappings. */ if (pciintr_link_fixup() != 0) return (-1); /* non-fatal */ return (0); }