1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* 30 * Host to PCI and PCI to PCI bridge drivers that use the MP Table to route 31 * interrupts from PCI devices to I/O APICs. 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/bus.h> 40 #include <sys/kernel.h> 41 #include <sys/module.h> 42 #include <sys/rman.h> 43 44 #include <dev/pci/pcireg.h> 45 #include <dev/pci/pcivar.h> 46 #include <dev/pci/pcib_private.h> 47 #include <x86/mptable.h> 48 #include <x86/legacyvar.h> 49 #include <machine/pci_cfgreg.h> 50 51 #include "pcib_if.h" 52 53 /* Host to PCI bridge driver. */ 54 55 static int 56 mptable_hostb_probe(device_t dev) 57 { 58 59 if (pci_cfgregopen() == 0) 60 return (ENXIO); 61 if (mptable_pci_probe_table(pcib_get_bus(dev)) != 0) 62 return (ENXIO); 63 device_set_desc(dev, "MPTable Host-PCI bridge"); 64 return (0); 65 } 66 67 static int 68 mptable_hostb_attach(device_t dev) 69 { 70 71 #ifdef NEW_PCIB 72 mptable_pci_host_res_init(dev); 73 #endif 74 device_add_child(dev, "pci", -1); 75 return (bus_generic_attach(dev)); 76 } 77 78 #ifdef NEW_PCIB 79 static int 80 mptable_is_isa_range(rman_res_t start, rman_res_t end) 81 { 82 83 if (end >= 0x10000) 84 return (0); 85 if ((start & 0xfc00) != (end & 0xfc00)) 86 return (0); 87 start &= ~0xfc00; 88 end &= ~0xfc00; 89 return (start >= 0x100 && end <= 0x3ff); 90 } 91 92 static int 93 mptable_is_vga_range(rman_res_t start, rman_res_t end) 94 { 95 if (end >= 0x10000) 96 return (0); 97 if ((start & 0xfc00) != (end & 0xfc00)) 98 return (0); 99 start &= ~0xfc00; 100 end &= ~0xfc00; 101 return (pci_is_vga_ioport_range(start, end)); 102 } 103 104 static struct resource * 105 mptable_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid, 106 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 107 { 108 struct mptable_hostb_softc *sc; 109 110 #ifdef PCI_RES_BUS 111 if (type == PCI_RES_BUS) 112 return (pci_domain_alloc_bus(0, child, rid, start, end, count, 113 flags)); 114 #endif 115 sc = device_get_softc(dev); 116 if (type == SYS_RES_IOPORT && start + count - 1 == end) { 117 if (mptable_is_isa_range(start, end)) { 118 switch (sc->sc_decodes_isa_io) { 119 case -1: 120 return (NULL); 121 case 1: 122 return (bus_generic_alloc_resource(dev, child, 123 type, rid, start, end, count, flags)); 124 default: 125 break; 126 } 127 } 128 if (mptable_is_vga_range(start, end)) { 129 switch (sc->sc_decodes_vga_io) { 130 case -1: 131 return (NULL); 132 case 1: 133 return (bus_generic_alloc_resource(dev, child, 134 type, rid, start, end, count, flags)); 135 default: 136 break; 137 } 138 } 139 } 140 start = hostb_alloc_start(type, start, end, count); 141 return (pcib_host_res_alloc(&sc->sc_host_res, child, type, rid, start, 142 end, count, flags)); 143 } 144 145 static int 146 mptable_hostb_adjust_resource(device_t dev, device_t child, int type, 147 struct resource *r, rman_res_t start, rman_res_t end) 148 { 149 struct mptable_hostb_softc *sc; 150 151 #ifdef PCI_RES_BUS 152 if (type == PCI_RES_BUS) 153 return (pci_domain_adjust_bus(0, child, r, start, end)); 154 #endif 155 sc = device_get_softc(dev); 156 return (pcib_host_res_adjust(&sc->sc_host_res, child, type, r, start, 157 end)); 158 } 159 #endif 160 161 static device_method_t mptable_hostb_methods[] = { 162 /* Device interface */ 163 DEVMETHOD(device_probe, mptable_hostb_probe), 164 DEVMETHOD(device_attach, mptable_hostb_attach), 165 DEVMETHOD(device_shutdown, bus_generic_shutdown), 166 DEVMETHOD(device_suspend, bus_generic_suspend), 167 DEVMETHOD(device_resume, bus_generic_resume), 168 169 /* Bus interface */ 170 DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar), 171 DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar), 172 #ifdef NEW_PCIB 173 DEVMETHOD(bus_alloc_resource, mptable_hostb_alloc_resource), 174 DEVMETHOD(bus_adjust_resource, mptable_hostb_adjust_resource), 175 #else 176 DEVMETHOD(bus_alloc_resource, legacy_pcib_alloc_resource), 177 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource), 178 #endif 179 #if defined(NEW_PCIB) && defined(PCI_RES_BUS) 180 DEVMETHOD(bus_release_resource, legacy_pcib_release_resource), 181 #else 182 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 183 #endif 184 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 185 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 186 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 187 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 188 189 /* pcib interface */ 190 DEVMETHOD(pcib_maxslots, legacy_pcib_maxslots), 191 DEVMETHOD(pcib_read_config, legacy_pcib_read_config), 192 DEVMETHOD(pcib_write_config, legacy_pcib_write_config), 193 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 194 DEVMETHOD(pcib_alloc_msi, legacy_pcib_alloc_msi), 195 DEVMETHOD(pcib_release_msi, pcib_release_msi), 196 DEVMETHOD(pcib_alloc_msix, legacy_pcib_alloc_msix), 197 DEVMETHOD(pcib_release_msix, pcib_release_msix), 198 DEVMETHOD(pcib_map_msi, legacy_pcib_map_msi), 199 200 DEVMETHOD_END 201 }; 202 203 static devclass_t hostb_devclass; 204 205 DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 206 sizeof(struct mptable_hostb_softc)); 207 DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0); 208 209 /* PCI to PCI bridge driver. */ 210 211 static int 212 mptable_pcib_probe(device_t dev) 213 { 214 int bus; 215 216 if ((pci_get_class(dev) != PCIC_BRIDGE) || 217 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) 218 return (ENXIO); 219 bus = pci_read_config(dev, PCIR_SECBUS_1, 1); 220 if (bus == 0) 221 return (ENXIO); 222 if (mptable_pci_probe_table(bus) != 0) 223 return (ENXIO); 224 device_set_desc(dev, "MPTable PCI-PCI bridge"); 225 return (-1000); 226 } 227 228 static device_method_t mptable_pcib_pci_methods[] = { 229 /* Device interface */ 230 DEVMETHOD(device_probe, mptable_pcib_probe), 231 232 /* pcib interface */ 233 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 234 235 {0, 0} 236 }; 237 238 static devclass_t pcib_devclass; 239 240 DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods, 241 sizeof(struct pcib_softc), pcib_driver); 242 DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0); 243