1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/module.h> 36 #include <sys/bus.h> 37 #include <sys/malloc.h> 38 #include <sys/kernel.h> 39 40 #include <dev/ofw/openfirm.h> 41 #include <dev/ofw/ofw_pci.h> 42 #include <dev/ofw/ofw_bus.h> 43 #include <dev/ofw/ofw_bus_subr.h> 44 45 #include <dev/pci/pcivar.h> 46 #include <dev/pci/pcireg.h> 47 #include <dev/pci/pcib_private.h> 48 49 #include <machine/intr_machdep.h> 50 51 #include "pcib_if.h" 52 53 static int ofw_pcib_pci_probe(device_t bus); 54 static int ofw_pcib_pci_attach(device_t bus); 55 static phandle_t ofw_pcib_pci_get_node(device_t bus, device_t dev); 56 static int ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, 57 int intpin); 58 59 static device_method_t ofw_pcib_pci_methods[] = { 60 /* Device interface */ 61 DEVMETHOD(device_probe, ofw_pcib_pci_probe), 62 DEVMETHOD(device_attach, ofw_pcib_pci_attach), 63 64 /* pcib interface */ 65 DEVMETHOD(pcib_route_interrupt, ofw_pcib_pci_route_interrupt), 66 DEVMETHOD(pcib_request_feature, pcib_request_feature_allow), 67 68 /* ofw_bus interface */ 69 DEVMETHOD(ofw_bus_get_node, ofw_pcib_pci_get_node), 70 71 DEVMETHOD_END 72 }; 73 74 static devclass_t pcib_devclass; 75 76 struct ofw_pcib_softc { 77 /* 78 * This is here so that we can use pci bridge methods, too - the 79 * generic routines only need the dev, secbus and subbus members 80 * filled. 81 */ 82 struct pcib_softc ops_pcib_sc; 83 phandle_t ops_node; 84 struct ofw_bus_iinfo ops_iinfo; 85 }; 86 87 DEFINE_CLASS_1(pcib, ofw_pcib_pci_driver, ofw_pcib_pci_methods, 88 sizeof(struct ofw_pcib_softc), pcib_driver); 89 EARLY_DRIVER_MODULE(ofw_pcib, pci, ofw_pcib_pci_driver, pcib_devclass, 0, 0, 90 BUS_PASS_BUS); 91 92 static int 93 ofw_pcib_pci_probe(device_t dev) 94 { 95 96 if ((pci_get_class(dev) != PCIC_BRIDGE) || 97 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) { 98 return (ENXIO); 99 } 100 101 if (ofw_bus_get_node(dev) == -1) 102 return (ENXIO); 103 104 device_set_desc(dev, "OFW PCI-PCI bridge"); 105 return (0); 106 } 107 108 static int 109 ofw_pcib_pci_attach(device_t dev) 110 { 111 struct ofw_pcib_softc *sc; 112 113 sc = device_get_softc(dev); 114 sc->ops_pcib_sc.dev = dev; 115 sc->ops_node = ofw_bus_get_node(dev); 116 117 ofw_bus_setup_iinfo(sc->ops_node, &sc->ops_iinfo, 118 sizeof(cell_t)); 119 120 pcib_attach_common(dev); 121 return (pcib_attach_child(dev)); 122 } 123 124 static phandle_t 125 ofw_pcib_pci_get_node(device_t bridge, device_t dev) 126 { 127 /* We have only one child, the PCI bus, so pass it our node */ 128 129 return (ofw_bus_get_node(bridge)); 130 } 131 132 static int 133 ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, int intpin) 134 { 135 struct ofw_pcib_softc *sc; 136 struct ofw_bus_iinfo *ii; 137 struct ofw_pci_register reg; 138 cell_t pintr, mintr[2]; 139 int intrcells; 140 phandle_t iparent; 141 142 sc = device_get_softc(bridge); 143 ii = &sc->ops_iinfo; 144 if (ii->opi_imapsz > 0) { 145 pintr = intpin; 146 147 /* Fabricate imap information if this isn't an OFW device */ 148 bzero(®, sizeof(reg)); 149 reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) | 150 (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) | 151 (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT); 152 153 intrcells = ofw_bus_lookup_imap(ofw_bus_get_node(dev), ii, ®, 154 sizeof(reg), &pintr, sizeof(pintr), mintr, sizeof(mintr), 155 &iparent); 156 if (intrcells) { 157 /* 158 * If we've found a mapping, return it and don't map 159 * it again on higher levels - that causes problems 160 * in some cases, and never seems to be required. 161 */ 162 mintr[0] = ofw_bus_map_intr(dev, iparent, intrcells, 163 mintr); 164 return (mintr[0]); 165 } 166 } else if (intpin >= 1 && intpin <= 4) { 167 /* 168 * When an interrupt map is missing, we need to do the 169 * standard PCI swizzle and continue mapping at the parent. 170 */ 171 return (pcib_route_interrupt(bridge, dev, intpin)); 172 } 173 return (PCIB_ROUTE_INTERRUPT(device_get_parent(device_get_parent( 174 bridge)), bridge, intpin)); 175 } 176