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