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/param.h> 34 #include <sys/systm.h> 35 #include <sys/bus.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/rman.h> 39 40 #include <dev/pci/pcireg.h> 41 #include <dev/pci/pcivar.h> 42 #include <dev/pci/pcib_private.h> 43 #include <x86/mptable.h> 44 #include <x86/legacyvar.h> 45 #include <machine/pci_cfgreg.h> 46 47 #include "pcib_if.h" 48 49 /* Host to PCI bridge driver. */ 50 51 static int 52 mptable_hostb_probe(device_t dev) 53 { 54 55 if (pci_cfgregopen() == 0) 56 return (ENXIO); 57 if (mptable_pci_probe_table(legacy_get_pcibus(dev)) != 0) 58 return (ENXIO); 59 device_set_desc(dev, "MPTable Host-PCI bridge"); 60 return (0); 61 } 62 63 static int 64 mptable_hostb_attach(device_t dev) 65 { 66 67 #ifdef NEW_PCIB 68 mptable_pci_host_res_init(dev); 69 #endif 70 device_add_child(dev, "pci", -1); 71 return (bus_generic_attach(dev)); 72 } 73 74 #ifdef NEW_PCIB 75 static int 76 mptable_is_isa_range(rman_res_t start, rman_res_t end) 77 { 78 79 if (end >= 0x10000) 80 return (0); 81 if ((start & 0xfc00) != (end & 0xfc00)) 82 return (0); 83 start &= ~0xfc00; 84 end &= ~0xfc00; 85 return (start >= 0x100 && end <= 0x3ff); 86 } 87 88 static int 89 mptable_is_vga_range(rman_res_t start, rman_res_t end) 90 { 91 if (end >= 0x10000) 92 return (0); 93 if ((start & 0xfc00) != (end & 0xfc00)) 94 return (0); 95 start &= ~0xfc00; 96 end &= ~0xfc00; 97 return (pci_is_vga_ioport_range(start, end)); 98 } 99 100 static struct resource * 101 mptable_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid, 102 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 103 { 104 struct mptable_hostb_softc *sc; 105 106 #ifdef PCI_RES_BUS 107 if (type == PCI_RES_BUS) 108 return (pci_domain_alloc_bus(0, child, rid, start, end, count, 109 flags)); 110 #endif 111 sc = device_get_softc(dev); 112 if (type == SYS_RES_IOPORT && start + count - 1 == end) { 113 if (mptable_is_isa_range(start, end)) { 114 switch (sc->sc_decodes_isa_io) { 115 case -1: 116 return (NULL); 117 case 1: 118 return (bus_generic_alloc_resource(dev, child, 119 type, rid, start, end, count, flags)); 120 default: 121 break; 122 } 123 } 124 if (mptable_is_vga_range(start, end)) { 125 switch (sc->sc_decodes_vga_io) { 126 case -1: 127 return (NULL); 128 case 1: 129 return (bus_generic_alloc_resource(dev, child, 130 type, rid, start, end, count, flags)); 131 default: 132 break; 133 } 134 } 135 } 136 start = hostb_alloc_start(type, start, end, count); 137 return (pcib_host_res_alloc(&sc->sc_host_res, child, type, rid, start, 138 end, count, flags)); 139 } 140 141 static int 142 mptable_hostb_adjust_resource(device_t dev, device_t child, int type, 143 struct resource *r, rman_res_t start, rman_res_t end) 144 { 145 struct mptable_hostb_softc *sc; 146 147 #ifdef PCI_RES_BUS 148 if (type == PCI_RES_BUS) 149 return (pci_domain_adjust_bus(0, child, r, start, end)); 150 #endif 151 sc = device_get_softc(dev); 152 return (pcib_host_res_adjust(&sc->sc_host_res, child, type, r, start, 153 end)); 154 } 155 #endif 156 157 static device_method_t mptable_hostb_methods[] = { 158 /* Device interface */ 159 DEVMETHOD(device_probe, mptable_hostb_probe), 160 DEVMETHOD(device_attach, mptable_hostb_attach), 161 DEVMETHOD(device_shutdown, bus_generic_shutdown), 162 DEVMETHOD(device_suspend, bus_generic_suspend), 163 DEVMETHOD(device_resume, bus_generic_resume), 164 165 /* Bus interface */ 166 DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar), 167 DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar), 168 #ifdef NEW_PCIB 169 DEVMETHOD(bus_alloc_resource, mptable_hostb_alloc_resource), 170 DEVMETHOD(bus_adjust_resource, mptable_hostb_adjust_resource), 171 #else 172 DEVMETHOD(bus_alloc_resource, legacy_pcib_alloc_resource), 173 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource), 174 #endif 175 #if defined(NEW_PCIB) && defined(PCI_RES_BUS) 176 DEVMETHOD(bus_release_resource, legacy_pcib_release_resource), 177 #else 178 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 179 #endif 180 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 181 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 182 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 183 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 184 185 /* pcib interface */ 186 DEVMETHOD(pcib_maxslots, legacy_pcib_maxslots), 187 DEVMETHOD(pcib_read_config, legacy_pcib_read_config), 188 DEVMETHOD(pcib_write_config, legacy_pcib_write_config), 189 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 190 DEVMETHOD(pcib_alloc_msi, legacy_pcib_alloc_msi), 191 DEVMETHOD(pcib_release_msi, pcib_release_msi), 192 DEVMETHOD(pcib_alloc_msix, legacy_pcib_alloc_msix), 193 DEVMETHOD(pcib_release_msix, pcib_release_msix), 194 DEVMETHOD(pcib_map_msi, legacy_pcib_map_msi), 195 196 DEVMETHOD_END 197 }; 198 199 DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 200 sizeof(struct mptable_hostb_softc)); 201 DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, 0, 0); 202 203 /* PCI to PCI bridge driver. */ 204 205 static int 206 mptable_pcib_probe(device_t dev) 207 { 208 int bus; 209 210 if ((pci_get_class(dev) != PCIC_BRIDGE) || 211 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) 212 return (ENXIO); 213 bus = pci_read_config(dev, PCIR_SECBUS_1, 1); 214 if (bus == 0) 215 return (ENXIO); 216 if (mptable_pci_probe_table(bus) != 0) 217 return (ENXIO); 218 device_set_desc(dev, "MPTable PCI-PCI bridge"); 219 return (-1000); 220 } 221 222 static device_method_t mptable_pcib_pci_methods[] = { 223 /* Device interface */ 224 DEVMETHOD(device_probe, mptable_pcib_probe), 225 226 /* pcib interface */ 227 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 228 {0, 0} 229 }; 230 231 DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods, 232 sizeof(struct pcib_softc), pcib_driver); 233 DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, 0, 0); 234