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