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("$FreeBSD$"); 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 56 static int 57 mptable_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 68 static int 69 mptable_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 /* Pass MSI requests up to the nexus. */ 80 static int 81 mptable_hostb_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, 82 int *irqs) 83 { 84 device_t bus; 85 86 bus = device_get_parent(pcib); 87 return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount, 88 irqs)); 89 } 90 91 static int 92 mptable_hostb_alloc_msix(device_t pcib, device_t dev, int *irq) 93 { 94 device_t bus; 95 96 bus = device_get_parent(pcib); 97 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq)); 98 } 99 100 #ifdef NEW_PCIB 101 static int 102 mptable_is_isa_range(u_long start, u_long end) 103 { 104 105 if (end >= 0x10000) 106 return (0); 107 if ((start & 0xfc00) != (end & 0xfc00)) 108 return (0); 109 start &= ~0xfc00; 110 end &= ~0xfc00; 111 return (start >= 0x100 && end <= 0x3ff); 112 } 113 114 static int 115 mptable_is_vga_range(u_long start, u_long end) 116 { 117 if (end >= 0x10000) 118 return (0); 119 if ((start & 0xfc00) != (end & 0xfc00)) 120 return (0); 121 start &= ~0xfc00; 122 end &= ~0xfc00; 123 return (pci_is_vga_ioport_range(start, end)); 124 } 125 126 static struct resource * 127 mptable_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid, 128 u_long start, u_long end, u_long count, u_int flags) 129 { 130 struct mptable_hostb_softc *sc; 131 132 sc = device_get_softc(dev); 133 if (type == SYS_RES_IOPORT && start + count - 1 == end) { 134 if (mptable_is_isa_range(start, end)) { 135 switch (sc->sc_decodes_isa_io) { 136 case -1: 137 return (NULL); 138 case 1: 139 return (bus_generic_alloc_resource(dev, child, 140 type, rid, start, end, count, flags)); 141 default: 142 break; 143 } 144 } 145 if (mptable_is_vga_range(start, end)) { 146 switch (sc->sc_decodes_vga_io) { 147 case -1: 148 return (NULL); 149 case 1: 150 return (bus_generic_alloc_resource(dev, child, 151 type, rid, start, end, count, flags)); 152 default: 153 break; 154 } 155 } 156 } 157 start = hostb_alloc_start(type, start, end, count); 158 return (pcib_host_res_alloc(&sc->sc_host_res, child, type, rid, start, 159 end, count, flags)); 160 } 161 162 static int 163 mptable_hostb_adjust_resource(device_t dev, device_t child, int type, 164 struct resource *r, u_long start, u_long end) 165 { 166 struct mptable_hostb_softc *sc; 167 168 sc = device_get_softc(dev); 169 return (pcib_host_res_adjust(&sc->sc_host_res, child, type, r, start, 170 end)); 171 } 172 #endif 173 174 static device_method_t mptable_hostb_methods[] = { 175 /* Device interface */ 176 DEVMETHOD(device_probe, mptable_hostb_probe), 177 DEVMETHOD(device_attach, mptable_hostb_attach), 178 DEVMETHOD(device_shutdown, bus_generic_shutdown), 179 DEVMETHOD(device_suspend, bus_generic_suspend), 180 DEVMETHOD(device_resume, bus_generic_resume), 181 182 /* Bus interface */ 183 DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar), 184 DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar), 185 #ifdef NEW_PCIB 186 DEVMETHOD(bus_alloc_resource, mptable_hostb_alloc_resource), 187 DEVMETHOD(bus_adjust_resource, mptable_hostb_adjust_resource), 188 #else 189 DEVMETHOD(bus_alloc_resource, legacy_pcib_alloc_resource), 190 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource), 191 #endif 192 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 193 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 194 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 195 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 196 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 197 198 /* pcib interface */ 199 DEVMETHOD(pcib_maxslots, legacy_pcib_maxslots), 200 DEVMETHOD(pcib_read_config, legacy_pcib_read_config), 201 DEVMETHOD(pcib_write_config, legacy_pcib_write_config), 202 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 203 DEVMETHOD(pcib_alloc_msi, mptable_hostb_alloc_msi), 204 DEVMETHOD(pcib_release_msi, pcib_release_msi), 205 DEVMETHOD(pcib_alloc_msix, mptable_hostb_alloc_msix), 206 DEVMETHOD(pcib_release_msix, pcib_release_msix), 207 DEVMETHOD(pcib_map_msi, legacy_pcib_map_msi), 208 209 DEVMETHOD_END 210 }; 211 212 static devclass_t hostb_devclass; 213 214 DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 215 sizeof(struct mptable_hostb_softc)); 216 DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0); 217 218 /* PCI to PCI bridge driver. */ 219 220 static int 221 mptable_pcib_probe(device_t dev) 222 { 223 int bus; 224 225 if ((pci_get_class(dev) != PCIC_BRIDGE) || 226 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) 227 return (ENXIO); 228 bus = pci_read_config(dev, PCIR_SECBUS_1, 1); 229 if (bus == 0) 230 return (ENXIO); 231 if (mptable_pci_probe_table(bus) != 0) 232 return (ENXIO); 233 device_set_desc(dev, "MPTable PCI-PCI bridge"); 234 return (-1000); 235 } 236 237 static device_method_t mptable_pcib_pci_methods[] = { 238 /* Device interface */ 239 DEVMETHOD(device_probe, mptable_pcib_probe), 240 241 /* pcib interface */ 242 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 243 244 {0, 0} 245 }; 246 247 static devclass_t pcib_devclass; 248 249 DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods, 250 sizeof(struct pcib_softc), pcib_driver); 251 DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0); 252