mptable_pci.c revision 262192
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 262192 2014-02-18 20:27:17Z 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/* Pass MSI requests up to the nexus. */ 77static int 78mptable_hostb_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, 79 int *irqs) 80{ 81 device_t bus; 82 83 bus = device_get_parent(pcib); 84 return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount, 85 irqs)); 86} 87 88static int 89mptable_hostb_alloc_msix(device_t pcib, device_t dev, int *irq) 90{ 91 device_t bus; 92 93 bus = device_get_parent(pcib); 94 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq)); 95} 96 97#ifdef NEW_PCIB 98static int 99mptable_is_isa_range(u_long start, u_long end) 100{ 101 102 if (end >= 0x10000) 103 return (0); 104 if ((start & 0xfc00) != (end & 0xfc00)) 105 return (0); 106 start &= ~0xfc00; 107 end &= ~0xfc00; 108 return (start >= 0x100 && end <= 0x3ff); 109} 110 111static int 112mptable_is_vga_range(u_long start, u_long end) 113{ 114 if (end >= 0x10000) 115 return (0); 116 if ((start & 0xfc00) != (end & 0xfc00)) 117 return (0); 118 start &= ~0xfc00; 119 end &= ~0xfc00; 120 return (pci_is_vga_ioport_range(start, end)); 121} 122 123static struct resource * 124mptable_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid, 125 u_long start, u_long end, u_long count, u_int flags) 126{ 127 struct mptable_hostb_softc *sc; 128 129 sc = device_get_softc(dev); 130 if (type == SYS_RES_IOPORT && start + count - 1 == end) { 131 if (mptable_is_isa_range(start, end)) { 132 switch (sc->sc_decodes_isa_io) { 133 case -1: 134 return (NULL); 135 case 1: 136 return (bus_generic_alloc_resource(dev, child, 137 type, rid, start, end, count, flags)); 138 default: 139 break; 140 } 141 } 142 if (mptable_is_vga_range(start, end)) { 143 switch (sc->sc_decodes_vga_io) { 144 case -1: 145 return (NULL); 146 case 1: 147 return (bus_generic_alloc_resource(dev, child, 148 type, rid, start, end, count, flags)); 149 default: 150 break; 151 } 152 } 153 } 154 start = hostb_alloc_start(type, start, end, count); 155 return (pcib_host_res_alloc(&sc->sc_host_res, child, type, rid, start, 156 end, count, flags)); 157} 158 159static int 160mptable_hostb_adjust_resource(device_t dev, device_t child, int type, 161 struct resource *r, u_long start, u_long end) 162{ 163 struct mptable_hostb_softc *sc; 164 165 sc = device_get_softc(dev); 166 return (pcib_host_res_adjust(&sc->sc_host_res, child, type, r, start, 167 end)); 168} 169#endif 170 171static device_method_t mptable_hostb_methods[] = { 172 /* Device interface */ 173 DEVMETHOD(device_probe, mptable_hostb_probe), 174 DEVMETHOD(device_attach, mptable_hostb_attach), 175 DEVMETHOD(device_shutdown, bus_generic_shutdown), 176 DEVMETHOD(device_suspend, bus_generic_suspend), 177 DEVMETHOD(device_resume, bus_generic_resume), 178 179 /* Bus interface */ 180 DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar), 181 DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar), 182#ifdef NEW_PCIB 183 DEVMETHOD(bus_alloc_resource, mptable_hostb_alloc_resource), 184 DEVMETHOD(bus_adjust_resource, mptable_hostb_adjust_resource), 185#else 186 DEVMETHOD(bus_alloc_resource, legacy_pcib_alloc_resource), 187 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource), 188#endif 189 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 190 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 191 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 192 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 193 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 194 195 /* pcib interface */ 196 DEVMETHOD(pcib_maxslots, legacy_pcib_maxslots), 197 DEVMETHOD(pcib_read_config, legacy_pcib_read_config), 198 DEVMETHOD(pcib_write_config, legacy_pcib_write_config), 199 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 200 DEVMETHOD(pcib_alloc_msi, mptable_hostb_alloc_msi), 201 DEVMETHOD(pcib_release_msi, pcib_release_msi), 202 DEVMETHOD(pcib_alloc_msix, mptable_hostb_alloc_msix), 203 DEVMETHOD(pcib_release_msix, pcib_release_msix), 204 DEVMETHOD(pcib_map_msi, legacy_pcib_map_msi), 205 206 DEVMETHOD_END 207}; 208 209static devclass_t hostb_devclass; 210 211DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 212 sizeof(struct mptable_hostb_softc)); 213DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0); 214 215/* PCI to PCI bridge driver. */ 216 217static int 218mptable_pcib_probe(device_t dev) 219{ 220 int bus; 221 222 if ((pci_get_class(dev) != PCIC_BRIDGE) || 223 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) 224 return (ENXIO); 225 bus = pci_read_config(dev, PCIR_SECBUS_1, 1); 226 if (bus == 0) 227 return (ENXIO); 228 if (mptable_pci_probe_table(bus) != 0) 229 return (ENXIO); 230 device_set_desc(dev, "MPTable PCI-PCI bridge"); 231 return (-1000); 232} 233 234static device_method_t mptable_pcib_pci_methods[] = { 235 /* Device interface */ 236 DEVMETHOD(device_probe, mptable_pcib_probe), 237 238 /* pcib interface */ 239 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 240 241 {0, 0} 242}; 243 244static devclass_t pcib_devclass; 245 246DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods, 247 sizeof(struct pcib_softc), pcib_driver); 248DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0); 249