/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier * Copyright (c) 2000 Michael Smith * Copyright (c) 2000 BSDi * 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. 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 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. */ #include /* * PCI:ISA bridge support */ #include #include #include #include #include #include #include #include #include #include #include static int isab_pci_probe(device_t dev); static int isab_pci_attach(device_t dev); static struct resource * isab_pci_alloc_resource(device_t dev, device_t child, int type, int *rid, rman_res_t start, rman_res_t end, rman_res_t count, u_int flags); static int isab_pci_release_resource(device_t dev, device_t child, struct resource *r); static device_method_t isab_methods[] = { /* Device interface */ DEVMETHOD(device_probe, isab_pci_probe), DEVMETHOD(device_attach, isab_pci_attach), DEVMETHOD(device_detach, bus_generic_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), /* Bus interface */ DEVMETHOD(bus_add_child, bus_generic_add_child), DEVMETHOD(bus_alloc_resource, isab_pci_alloc_resource), DEVMETHOD(bus_release_resource, isab_pci_release_resource), DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), DEVMETHOD_END }; struct isab_pci_resource { struct resource *ip_res; int ip_refs; }; struct isab_pci_softc { struct isab_pci_resource isab_pci_res[PCIR_MAX_BAR_0 + 1]; }; static driver_t isab_driver = { "isab", isab_methods, sizeof(struct isab_pci_softc), }; DRIVER_MODULE(isab, pci, isab_driver, 0, 0); /* * XXX we need to add a quirk list here for bridges that don't correctly * report themselves. */ static int isab_pci_probe(device_t dev) { int matched = 0; /* * Try for a generic match based on class/subclass. */ if ((pci_get_class(dev) == PCIC_BRIDGE) && (pci_get_subclass(dev) == PCIS_BRIDGE_ISA)) { matched = 1; } else { /* * These are devices that we *know* are PCI:ISA bridges. * Sometimes, however, they don't report themselves as * such. Check in case one of them is pretending to be * something else. */ switch (pci_get_devid(dev)) { case 0x04848086: /* Intel 82378ZB/82378IB */ case 0x122e8086: /* Intel 82371FB */ case 0x70008086: /* Intel 82371SB */ case 0x71108086: /* Intel 82371AB */ case 0x71988086: /* Intel 82443MX */ case 0x24108086: /* Intel 82801AA (ICH) */ case 0x24208086: /* Intel 82801AB (ICH0) */ case 0x24408086: /* Intel 82801AB (ICH2) */ case 0x00061004: /* VLSI 82C593 */ case 0x05861106: /* VIA 82C586 */ case 0x05961106: /* VIA 82C596 */ case 0x06861106: /* VIA 82C686 */ case 0x153310b9: /* AcerLabs M1533 */ case 0x154310b9: /* AcerLabs M1543 */ case 0x00081039: /* SiS 85c503 */ case 0x00001078: /* Cyrix Cx5510 */ case 0x01001078: /* Cyrix Cx5530 */ case 0xc7001045: /* OPTi 82C700 (FireStar) */ case 0x886a1060: /* UMC UM8886 ISA */ case 0x02001166: /* ServerWorks IB6566 PCI */ if (bootverbose) printf("PCI-ISA bridge with incorrect subclass 0x%x\n", pci_get_subclass(dev)); matched = 1; break; default: break; } } if (matched) { device_set_desc(dev, "PCI-ISA bridge"); return(-10000); } return(ENXIO); } static int isab_pci_attach(device_t dev) { bus_generic_probe(dev); return (isab_attach(dev)); } static struct resource * isab_pci_alloc_resource(device_t dev, device_t child, int type, int *rid, rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) { struct isab_pci_softc *sc; int bar; if (device_get_parent(child) != dev) return bus_generic_alloc_resource(dev, child, type, rid, start, end, count, flags); switch (type) { case SYS_RES_MEMORY: case SYS_RES_IOPORT: /* * For BARs, we cache the resource so that we only allocate it * from the PCI bus once. */ bar = PCI_RID2BAR(*rid); if (bar < 0 || bar > PCIR_MAX_BAR_0) return (NULL); sc = device_get_softc(dev); if (sc->isab_pci_res[bar].ip_res == NULL) sc->isab_pci_res[bar].ip_res = bus_alloc_resource(dev, type, rid, start, end, count, flags); if (sc->isab_pci_res[bar].ip_res != NULL) sc->isab_pci_res[bar].ip_refs++; return (sc->isab_pci_res[bar].ip_res); } return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child, type, rid, start, end, count, flags)); } static int isab_pci_release_resource(device_t dev, device_t child, struct resource *r) { struct isab_pci_softc *sc; int bar, error; if (device_get_parent(child) != dev) return bus_generic_release_resource(dev, child, r); switch (rman_get_type(r)) { case SYS_RES_MEMORY: case SYS_RES_IOPORT: /* * For BARs, we release the resource from the PCI bus * when the last child reference goes away. */ bar = PCI_RID2BAR(rman_get_rid(r)); if (bar < 0 || bar > PCIR_MAX_BAR_0) return (EINVAL); sc = device_get_softc(dev); if (sc->isab_pci_res[bar].ip_res == NULL) return (EINVAL); KASSERT(sc->isab_pci_res[bar].ip_res == r, ("isa_pci resource mismatch")); if (sc->isab_pci_res[bar].ip_refs > 1) { sc->isab_pci_res[bar].ip_refs--; return (0); } KASSERT(sc->isab_pci_res[bar].ip_refs > 0, ("isa_pci resource reference count underflow")); error = bus_release_resource(dev, r); if (error == 0) { sc->isab_pci_res[bar].ip_res = NULL; sc->isab_pci_res[bar].ip_refs = 0; } return (error); } return (bus_generic_release_resource(dev, child, r)); }