1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2000 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following 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 AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/module.h> 33 #include <sys/bus.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 37 #include <dev/ofw/openfirm.h> 38 #include <dev/ofw/ofw_pci.h> 39 #include <dev/ofw/ofw_bus.h> 40 #include <dev/ofw/ofw_bus_subr.h> 41 42 #include <dev/pci/pcivar.h> 43 #include <dev/pci/pcireg.h> 44 #include <dev/pci/pcib_private.h> 45 46 #include <machine/intr_machdep.h> 47 48 #include "pcib_if.h" 49 50 static int ofw_pcib_pci_probe(device_t bus); 51 static int ofw_pcib_pci_attach(device_t bus); 52 static phandle_t ofw_pcib_pci_get_node(device_t bus, device_t dev); 53 static int ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, 54 int intpin); 55 56 static device_method_t ofw_pcib_pci_methods[] = { 57 /* Device interface */ 58 DEVMETHOD(device_probe, ofw_pcib_pci_probe), 59 DEVMETHOD(device_attach, ofw_pcib_pci_attach), 60 61 /* pcib interface */ 62 DEVMETHOD(pcib_route_interrupt, ofw_pcib_pci_route_interrupt), 63 DEVMETHOD(pcib_request_feature, pcib_request_feature_allow), 64 65 /* ofw_bus interface */ 66 DEVMETHOD(ofw_bus_get_node, ofw_pcib_pci_get_node), 67 68 DEVMETHOD_END 69 }; 70 71 struct ofw_pcib_softc { 72 /* 73 * This is here so that we can use pci bridge methods, too - the 74 * generic routines only need the dev, secbus and subbus members 75 * filled. 76 */ 77 struct pcib_softc ops_pcib_sc; 78 phandle_t ops_node; 79 struct ofw_bus_iinfo ops_iinfo; 80 }; 81 82 DEFINE_CLASS_1(pcib, ofw_pcib_pci_driver, ofw_pcib_pci_methods, 83 sizeof(struct ofw_pcib_softc), pcib_driver); 84 EARLY_DRIVER_MODULE(ofw_pcib, pci, ofw_pcib_pci_driver, 0, 0, BUS_PASS_BUS); 85 86 static int 87 ofw_pcib_pci_probe(device_t dev) 88 { 89 90 if ((pci_get_class(dev) != PCIC_BRIDGE) || 91 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) { 92 return (ENXIO); 93 } 94 95 if (ofw_bus_get_node(dev) == -1) 96 return (ENXIO); 97 98 device_set_desc(dev, "OFW PCI-PCI bridge"); 99 return (0); 100 } 101 102 static int 103 ofw_pcib_pci_attach(device_t dev) 104 { 105 struct ofw_pcib_softc *sc; 106 107 sc = device_get_softc(dev); 108 sc->ops_pcib_sc.dev = dev; 109 sc->ops_node = ofw_bus_get_node(dev); 110 111 ofw_bus_setup_iinfo(sc->ops_node, &sc->ops_iinfo, 112 sizeof(cell_t)); 113 114 pcib_attach_common(dev); 115 return (pcib_attach_child(dev)); 116 } 117 118 static phandle_t 119 ofw_pcib_pci_get_node(device_t bridge, device_t dev) 120 { 121 /* We have only one child, the PCI bus, so pass it our node */ 122 123 return (ofw_bus_get_node(bridge)); 124 } 125 126 static int 127 ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, int intpin) 128 { 129 struct ofw_pcib_softc *sc; 130 struct ofw_bus_iinfo *ii; 131 struct ofw_pci_register reg; 132 cell_t pintr, mintr[2]; 133 int intrcells; 134 phandle_t iparent; 135 136 sc = device_get_softc(bridge); 137 ii = &sc->ops_iinfo; 138 if (ii->opi_imapsz > 0) { 139 pintr = intpin; 140 141 /* Fabricate imap information if this isn't an OFW device */ 142 bzero(®, sizeof(reg)); 143 reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) | 144 (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) | 145 (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT); 146 147 intrcells = ofw_bus_lookup_imap(ofw_bus_get_node(dev), ii, ®, 148 sizeof(reg), &pintr, sizeof(pintr), mintr, sizeof(mintr), 149 &iparent); 150 if (intrcells) { 151 /* 152 * If we've found a mapping, return it and don't map 153 * it again on higher levels - that causes problems 154 * in some cases, and never seems to be required. 155 */ 156 mintr[0] = ofw_bus_map_intr(dev, iparent, intrcells, 157 mintr); 158 return (mintr[0]); 159 } 160 } else if (intpin >= 1 && intpin <= 4) { 161 /* 162 * When an interrupt map is missing, we need to do the 163 * standard PCI swizzle and continue mapping at the parent. 164 */ 165 return (pcib_route_interrupt(bridge, dev, intpin)); 166 } 167 return (PCIB_ROUTE_INTERRUPT(device_get_parent(device_get_parent( 168 bridge)), bridge, intpin)); 169 } 170