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 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bus.h> 37 #include <sys/kernel.h> 38 #include <sys/module.h> 39 #include <sys/rman.h> 40 41 #include <dev/pci/pcireg.h> 42 #include <dev/pci/pcivar.h> 43 #include <dev/pci/pcib_private.h> 44 #include <x86/mptable.h> 45 #include <x86/legacyvar.h> 46 #include <machine/pci_cfgreg.h> 47 48 #include "pcib_if.h" 49 50 /* Host to PCI bridge driver. */ 51 52 static int 53 mptable_hostb_probe(device_t dev) 54 { 55 56 if (pci_cfgregopen() == 0) 57 return (ENXIO); 58 if (mptable_pci_probe_table(legacy_get_pcibus(dev)) != 0) 59 return (ENXIO); 60 device_set_desc(dev, "MPTable Host-PCI bridge"); 61 return (0); 62 } 63 64 static int 65 mptable_hostb_attach(device_t dev) 66 { 67 68 #ifdef NEW_PCIB 69 mptable_pci_host_res_init(dev); 70 #endif 71 device_add_child(dev, "pci", -1); 72 return (bus_generic_attach(dev)); 73 } 74 75 #ifdef NEW_PCIB 76 static int 77 mptable_is_isa_range(rman_res_t start, rman_res_t end) 78 { 79 80 if (end >= 0x10000) 81 return (0); 82 if ((start & 0xfc00) != (end & 0xfc00)) 83 return (0); 84 start &= ~0xfc00; 85 end &= ~0xfc00; 86 return (start >= 0x100 && end <= 0x3ff); 87 } 88 89 static int 90 mptable_is_vga_range(rman_res_t start, rman_res_t end) 91 { 92 if (end >= 0x10000) 93 return (0); 94 if ((start & 0xfc00) != (end & 0xfc00)) 95 return (0); 96 start &= ~0xfc00; 97 end &= ~0xfc00; 98 return (pci_is_vga_ioport_range(start, end)); 99 } 100 101 static struct resource * 102 mptable_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid, 103 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 104 { 105 struct mptable_hostb_softc *sc; 106 107 #ifdef PCI_RES_BUS 108 if (type == PCI_RES_BUS) 109 return (pci_domain_alloc_bus(0, child, rid, start, end, count, 110 flags)); 111 #endif 112 sc = device_get_softc(dev); 113 if (type == SYS_RES_IOPORT && start + count - 1 == end) { 114 if (mptable_is_isa_range(start, end)) { 115 switch (sc->sc_decodes_isa_io) { 116 case -1: 117 return (NULL); 118 case 1: 119 return (bus_generic_alloc_resource(dev, child, 120 type, rid, start, end, count, flags)); 121 default: 122 break; 123 } 124 } 125 if (mptable_is_vga_range(start, end)) { 126 switch (sc->sc_decodes_vga_io) { 127 case -1: 128 return (NULL); 129 case 1: 130 return (bus_generic_alloc_resource(dev, child, 131 type, rid, start, end, count, flags)); 132 default: 133 break; 134 } 135 } 136 } 137 start = hostb_alloc_start(type, start, end, count); 138 return (pcib_host_res_alloc(&sc->sc_host_res, child, type, rid, start, 139 end, count, flags)); 140 } 141 142 static int 143 mptable_hostb_adjust_resource(device_t dev, device_t child, int type, 144 struct resource *r, rman_res_t start, rman_res_t end) 145 { 146 struct mptable_hostb_softc *sc; 147 148 #ifdef PCI_RES_BUS 149 if (type == PCI_RES_BUS) 150 return (pci_domain_adjust_bus(0, child, r, start, end)); 151 #endif 152 sc = device_get_softc(dev); 153 return (pcib_host_res_adjust(&sc->sc_host_res, child, type, r, start, 154 end)); 155 } 156 #endif 157 158 static device_method_t mptable_hostb_methods[] = { 159 /* Device interface */ 160 DEVMETHOD(device_probe, mptable_hostb_probe), 161 DEVMETHOD(device_attach, mptable_hostb_attach), 162 DEVMETHOD(device_shutdown, bus_generic_shutdown), 163 DEVMETHOD(device_suspend, bus_generic_suspend), 164 DEVMETHOD(device_resume, bus_generic_resume), 165 166 /* Bus interface */ 167 DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar), 168 DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar), 169 #ifdef NEW_PCIB 170 DEVMETHOD(bus_alloc_resource, mptable_hostb_alloc_resource), 171 DEVMETHOD(bus_adjust_resource, mptable_hostb_adjust_resource), 172 #else 173 DEVMETHOD(bus_alloc_resource, legacy_pcib_alloc_resource), 174 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource), 175 #endif 176 #if defined(NEW_PCIB) && defined(PCI_RES_BUS) 177 DEVMETHOD(bus_release_resource, legacy_pcib_release_resource), 178 #else 179 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 180 #endif 181 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 182 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 183 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 184 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 185 186 /* pcib interface */ 187 DEVMETHOD(pcib_maxslots, legacy_pcib_maxslots), 188 DEVMETHOD(pcib_read_config, legacy_pcib_read_config), 189 DEVMETHOD(pcib_write_config, legacy_pcib_write_config), 190 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 191 DEVMETHOD(pcib_alloc_msi, legacy_pcib_alloc_msi), 192 DEVMETHOD(pcib_release_msi, pcib_release_msi), 193 DEVMETHOD(pcib_alloc_msix, legacy_pcib_alloc_msix), 194 DEVMETHOD(pcib_release_msix, pcib_release_msix), 195 DEVMETHOD(pcib_map_msi, legacy_pcib_map_msi), 196 197 DEVMETHOD_END 198 }; 199 200 DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 201 sizeof(struct mptable_hostb_softc)); 202 DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, 0, 0); 203 204 /* PCI to PCI bridge driver. */ 205 206 static int 207 mptable_pcib_probe(device_t dev) 208 { 209 int bus; 210 211 if ((pci_get_class(dev) != PCIC_BRIDGE) || 212 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) 213 return (ENXIO); 214 bus = pci_read_config(dev, PCIR_SECBUS_1, 1); 215 if (bus == 0) 216 return (ENXIO); 217 if (mptable_pci_probe_table(bus) != 0) 218 return (ENXIO); 219 device_set_desc(dev, "MPTable PCI-PCI bridge"); 220 return (-1000); 221 } 222 223 static device_method_t mptable_pcib_pci_methods[] = { 224 /* Device interface */ 225 DEVMETHOD(device_probe, mptable_pcib_probe), 226 227 /* pcib interface */ 228 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 229 {0, 0} 230 }; 231 232 DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods, 233 sizeof(struct pcib_softc), pcib_driver); 234 DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, 0, 0); 235