mptable_pci.c revision 280969
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: stable/10/sys/x86/x86/mptable_pci.c 280969 2015-04-01 21:16:33Z jhb $"); 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 53static int 54mptable_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 65static int 66mptable_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", pcib_get_bus(dev)); 73 return (bus_generic_attach(dev)); 74} 75 76#ifdef NEW_PCIB 77static int 78mptable_is_isa_range(u_long start, u_long 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 90static int 91mptable_is_vga_range(u_long start, u_long 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 102static struct resource * 103mptable_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid, 104 u_long start, u_long end, u_long count, u_int flags) 105{ 106 struct mptable_hostb_softc *sc; 107 108 sc = device_get_softc(dev); 109 if (type == SYS_RES_IOPORT && start + count - 1 == end) { 110 if (mptable_is_isa_range(start, end)) { 111 switch (sc->sc_decodes_isa_io) { 112 case -1: 113 return (NULL); 114 case 1: 115 return (bus_generic_alloc_resource(dev, child, 116 type, rid, start, end, count, flags)); 117 default: 118 break; 119 } 120 } 121 if (mptable_is_vga_range(start, end)) { 122 switch (sc->sc_decodes_vga_io) { 123 case -1: 124 return (NULL); 125 case 1: 126 return (bus_generic_alloc_resource(dev, child, 127 type, rid, start, end, count, flags)); 128 default: 129 break; 130 } 131 } 132 } 133 start = hostb_alloc_start(type, start, end, count); 134 return (pcib_host_res_alloc(&sc->sc_host_res, child, type, rid, start, 135 end, count, flags)); 136} 137 138static int 139mptable_hostb_adjust_resource(device_t dev, device_t child, int type, 140 struct resource *r, u_long start, u_long end) 141{ 142 struct mptable_hostb_softc *sc; 143 144 sc = device_get_softc(dev); 145 return (pcib_host_res_adjust(&sc->sc_host_res, child, type, r, start, 146 end)); 147} 148#endif 149 150static device_method_t mptable_hostb_methods[] = { 151 /* Device interface */ 152 DEVMETHOD(device_probe, mptable_hostb_probe), 153 DEVMETHOD(device_attach, mptable_hostb_attach), 154 DEVMETHOD(device_shutdown, bus_generic_shutdown), 155 DEVMETHOD(device_suspend, bus_generic_suspend), 156 DEVMETHOD(device_resume, bus_generic_resume), 157 158 /* Bus interface */ 159 DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar), 160 DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar), 161#ifdef NEW_PCIB 162 DEVMETHOD(bus_alloc_resource, mptable_hostb_alloc_resource), 163 DEVMETHOD(bus_adjust_resource, mptable_hostb_adjust_resource), 164#else 165 DEVMETHOD(bus_alloc_resource, legacy_pcib_alloc_resource), 166 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource), 167#endif 168 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 169 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 170 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 171 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 172 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 173 174 /* pcib interface */ 175 DEVMETHOD(pcib_maxslots, legacy_pcib_maxslots), 176 DEVMETHOD(pcib_read_config, legacy_pcib_read_config), 177 DEVMETHOD(pcib_write_config, legacy_pcib_write_config), 178 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 179 DEVMETHOD(pcib_alloc_msi, legacy_pcib_alloc_msi), 180 DEVMETHOD(pcib_release_msi, pcib_release_msi), 181 DEVMETHOD(pcib_alloc_msix, legacy_pcib_alloc_msix), 182 DEVMETHOD(pcib_release_msix, pcib_release_msix), 183 DEVMETHOD(pcib_map_msi, legacy_pcib_map_msi), 184 185 DEVMETHOD_END 186}; 187 188static devclass_t hostb_devclass; 189 190DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 191 sizeof(struct mptable_hostb_softc)); 192DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0); 193 194/* PCI to PCI bridge driver. */ 195 196static int 197mptable_pcib_probe(device_t dev) 198{ 199 int bus; 200 201 if ((pci_get_class(dev) != PCIC_BRIDGE) || 202 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) 203 return (ENXIO); 204 bus = pci_read_config(dev, PCIR_SECBUS_1, 1); 205 if (bus == 0) 206 return (ENXIO); 207 if (mptable_pci_probe_table(bus) != 0) 208 return (ENXIO); 209 device_set_desc(dev, "MPTable PCI-PCI bridge"); 210 return (-1000); 211} 212 213static device_method_t mptable_pcib_pci_methods[] = { 214 /* Device interface */ 215 DEVMETHOD(device_probe, mptable_pcib_probe), 216 217 /* pcib interface */ 218 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 219 220 {0, 0} 221}; 222 223static devclass_t pcib_devclass; 224 225DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods, 226 sizeof(struct pcib_softc), pcib_driver); 227DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0); 228