mptable_pci.c revision 260973
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 * 3. Neither the name of the author nor the names of any co-contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30/* 31 * Host to PCI and PCI to PCI bridge drivers that use the MP Table to route 32 * interrupts from PCI devices to I/O APICs. 33 */ 34 35#include <sys/cdefs.h> 36__FBSDID("$FreeBSD: head/sys/x86/x86/mptable_pci.c 260973 2014-01-21 03:14:19Z jhb $"); 37 38#include <sys/param.h> 39#include <sys/systm.h> 40#include <sys/bus.h> 41#include <sys/kernel.h> 42#include <sys/module.h> 43#include <sys/rman.h> 44 45#include <dev/pci/pcireg.h> 46#include <dev/pci/pcivar.h> 47#include <dev/pci/pcib_private.h> 48#include <x86/mptable.h> 49#include <x86/legacyvar.h> 50#include <machine/pci_cfgreg.h> 51 52#include "pcib_if.h" 53 54/* Host to PCI bridge driver. */ 55 56static int 57mptable_hostb_probe(device_t dev) 58{ 59 60 if (pci_cfgregopen() == 0) 61 return (ENXIO); 62 if (mptable_pci_probe_table(pcib_get_bus(dev)) != 0) 63 return (ENXIO); 64 device_set_desc(dev, "MPTable Host-PCI bridge"); 65 return (0); 66} 67 68static int 69mptable_hostb_attach(device_t dev) 70{ 71 72#ifdef NEW_PCIB 73 mptable_pci_host_res_init(dev); 74#endif 75 device_add_child(dev, "pci", pcib_get_bus(dev)); 76 return (bus_generic_attach(dev)); 77} 78 79#ifdef NEW_PCIB 80static int 81mptable_is_isa_range(u_long start, u_long end) 82{ 83 84 if (end >= 0x10000) 85 return (0); 86 if ((start & 0xfc00) != (end & 0xfc00)) 87 return (0); 88 start &= ~0xfc00; 89 end &= ~0xfc00; 90 return (start >= 0x100 && end <= 0x3ff); 91} 92 93static int 94mptable_is_vga_range(u_long start, u_long end) 95{ 96 if (end >= 0x10000) 97 return (0); 98 if ((start & 0xfc00) != (end & 0xfc00)) 99 return (0); 100 start &= ~0xfc00; 101 end &= ~0xfc00; 102 return (pci_is_vga_ioport_range(start, end)); 103} 104 105static struct resource * 106mptable_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid, 107 u_long start, u_long end, u_long count, u_int flags) 108{ 109 struct mptable_hostb_softc *sc; 110 111 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 141static int 142mptable_hostb_adjust_resource(device_t dev, device_t child, int type, 143 struct resource *r, u_long start, u_long end) 144{ 145 struct mptable_hostb_softc *sc; 146 147 sc = device_get_softc(dev); 148 return (pcib_host_res_adjust(&sc->sc_host_res, child, type, r, start, 149 end)); 150} 151#endif 152 153static device_method_t mptable_hostb_methods[] = { 154 /* Device interface */ 155 DEVMETHOD(device_probe, mptable_hostb_probe), 156 DEVMETHOD(device_attach, mptable_hostb_attach), 157 DEVMETHOD(device_shutdown, bus_generic_shutdown), 158 DEVMETHOD(device_suspend, bus_generic_suspend), 159 DEVMETHOD(device_resume, bus_generic_resume), 160 161 /* Bus interface */ 162 DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar), 163 DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar), 164#ifdef NEW_PCIB 165 DEVMETHOD(bus_alloc_resource, mptable_hostb_alloc_resource), 166 DEVMETHOD(bus_adjust_resource, mptable_hostb_adjust_resource), 167#else 168 DEVMETHOD(bus_alloc_resource, legacy_pcib_alloc_resource), 169 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource), 170#endif 171 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 172 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 173 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 174 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 175 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 176 177 /* pcib interface */ 178 DEVMETHOD(pcib_maxslots, legacy_pcib_maxslots), 179 DEVMETHOD(pcib_read_config, legacy_pcib_read_config), 180 DEVMETHOD(pcib_write_config, legacy_pcib_write_config), 181 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 182 DEVMETHOD(pcib_alloc_msi, legacy_pcib_alloc_msi), 183 DEVMETHOD(pcib_release_msi, pcib_release_msi), 184 DEVMETHOD(pcib_alloc_msix, legacy_pcib_alloc_msix), 185 DEVMETHOD(pcib_release_msix, pcib_release_msix), 186 DEVMETHOD(pcib_map_msi, legacy_pcib_map_msi), 187 188 DEVMETHOD_END 189}; 190 191static devclass_t hostb_devclass; 192 193DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 194 sizeof(struct mptable_hostb_softc)); 195DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0); 196 197/* PCI to PCI bridge driver. */ 198 199static int 200mptable_pcib_probe(device_t dev) 201{ 202 int bus; 203 204 if ((pci_get_class(dev) != PCIC_BRIDGE) || 205 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) 206 return (ENXIO); 207 bus = pci_read_config(dev, PCIR_SECBUS_1, 1); 208 if (bus == 0) 209 return (ENXIO); 210 if (mptable_pci_probe_table(bus) != 0) 211 return (ENXIO); 212 device_set_desc(dev, "MPTable PCI-PCI bridge"); 213 return (-1000); 214} 215 216static device_method_t mptable_pcib_pci_methods[] = { 217 /* Device interface */ 218 DEVMETHOD(device_probe, mptable_pcib_probe), 219 220 /* pcib interface */ 221 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 222 223 {0, 0} 224}; 225 226static devclass_t pcib_devclass; 227 228DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods, 229 sizeof(struct pcib_softc), pcib_driver); 230DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0); 231