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 struct ofw_pcib_softc { 75 /* 76 * This is here so that we can use pci bridge methods, too - the 77 * generic routines only need the dev, secbus and subbus members 78 * filled. 79 */ 80 struct pcib_softc ops_pcib_sc; 81 phandle_t ops_node; 82 struct ofw_bus_iinfo ops_iinfo; 83 }; 84 85 DEFINE_CLASS_1(pcib, ofw_pcib_pci_driver, ofw_pcib_pci_methods, 86 sizeof(struct ofw_pcib_softc), pcib_driver); 87 EARLY_DRIVER_MODULE(ofw_pcib, pci, ofw_pcib_pci_driver, 0, 0, BUS_PASS_BUS); 88 89 static int 90 ofw_pcib_pci_probe(device_t dev) 91 { 92 93 if ((pci_get_class(dev) != PCIC_BRIDGE) || 94 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) { 95 return (ENXIO); 96 } 97 98 if (ofw_bus_get_node(dev) == -1) 99 return (ENXIO); 100 101 device_set_desc(dev, "OFW PCI-PCI bridge"); 102 return (0); 103 } 104 105 static int 106 ofw_pcib_pci_attach(device_t dev) 107 { 108 struct ofw_pcib_softc *sc; 109 110 sc = device_get_softc(dev); 111 sc->ops_pcib_sc.dev = dev; 112 sc->ops_node = ofw_bus_get_node(dev); 113 114 ofw_bus_setup_iinfo(sc->ops_node, &sc->ops_iinfo, 115 sizeof(cell_t)); 116 117 pcib_attach_common(dev); 118 return (pcib_attach_child(dev)); 119 } 120 121 static phandle_t 122 ofw_pcib_pci_get_node(device_t bridge, device_t dev) 123 { 124 /* We have only one child, the PCI bus, so pass it our node */ 125 126 return (ofw_bus_get_node(bridge)); 127 } 128 129 static int 130 ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, int intpin) 131 { 132 struct ofw_pcib_softc *sc; 133 struct ofw_bus_iinfo *ii; 134 struct ofw_pci_register reg; 135 cell_t pintr, mintr[2]; 136 int intrcells; 137 phandle_t iparent; 138 139 sc = device_get_softc(bridge); 140 ii = &sc->ops_iinfo; 141 if (ii->opi_imapsz > 0) { 142 pintr = intpin; 143 144 /* Fabricate imap information if this isn't an OFW device */ 145 bzero(®, sizeof(reg)); 146 reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) | 147 (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) | 148 (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT); 149 150 intrcells = ofw_bus_lookup_imap(ofw_bus_get_node(dev), ii, ®, 151 sizeof(reg), &pintr, sizeof(pintr), mintr, sizeof(mintr), 152 &iparent); 153 if (intrcells) { 154 /* 155 * If we've found a mapping, return it and don't map 156 * it again on higher levels - that causes problems 157 * in some cases, and never seems to be required. 158 */ 159 mintr[0] = ofw_bus_map_intr(dev, iparent, intrcells, 160 mintr); 161 return (mintr[0]); 162 } 163 } else if (intpin >= 1 && intpin <= 4) { 164 /* 165 * When an interrupt map is missing, we need to do the 166 * standard PCI swizzle and continue mapping at the parent. 167 */ 168 return (pcib_route_interrupt(bridge, dev, intpin)); 169 } 170 return (PCIB_ROUTE_INTERRUPT(device_get_parent(device_get_parent( 171 bridge)), bridge, intpin)); 172 } 173