hostb_pci.c revision 331722
1/* 2 * Copyright (c) 1997, Stefan Esser <se@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 unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: stable/11/sys/dev/pci/hostb_pci.c 331722 2018-03-29 02:50:57Z eadler $"); 29 30#include <sys/param.h> 31#include <sys/bus.h> 32#include <sys/kernel.h> 33#include <sys/module.h> 34 35#include <dev/pci/pcivar.h> 36#include <dev/pci/pcireg.h> 37 38/* 39 * Provide a device to "eat" the host->pci bridge devices that show up 40 * on PCI busses and stop them showing up twice on the probes. This also 41 * stops them showing up as 'none' in pciconf -l. If the host bridge 42 * provides an AGP capability then we create a child agp device for the 43 * agp GART driver to attach to. 44 */ 45static int 46pci_hostb_probe(device_t dev) 47{ 48 u_int32_t id; 49 50 id = pci_get_devid(dev); 51 52 switch (id) { 53 54 /* VIA VT82C596 Power Management Function */ 55 case 0x30501106: 56 return (ENXIO); 57 58 default: 59 break; 60 } 61 62 if (pci_get_class(dev) == PCIC_BRIDGE && 63 pci_get_subclass(dev) == PCIS_BRIDGE_HOST) { 64 device_set_desc(dev, "Host to PCI bridge"); 65 device_quiet(dev); 66 return (-10000); 67 } 68 return (ENXIO); 69} 70 71static int 72pci_hostb_attach(device_t dev) 73{ 74 75 bus_generic_probe(dev); 76 77 /* 78 * If AGP capabilities are present on this device, then create 79 * an AGP child. 80 */ 81 if (pci_find_cap(dev, PCIY_AGP, NULL) == 0) 82 device_add_child(dev, "agp", -1); 83 bus_generic_attach(dev); 84 return (0); 85} 86 87/* Bus interface. */ 88 89static int 90pci_hostb_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 91{ 92 93 return (BUS_READ_IVAR(device_get_parent(dev), dev, which, result)); 94} 95 96static int 97pci_hostb_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 98{ 99 100 return (EINVAL); 101} 102 103static struct resource * 104pci_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid, 105 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 106{ 107 108 return (bus_alloc_resource(dev, type, rid, start, end, count, flags)); 109} 110 111static int 112pci_hostb_release_resource(device_t dev, device_t child, int type, int rid, 113 struct resource *r) 114{ 115 116 return (bus_release_resource(dev, type, rid, r)); 117} 118 119/* PCI interface. */ 120 121static uint32_t 122pci_hostb_read_config(device_t dev, device_t child, int reg, int width) 123{ 124 125 return (pci_read_config(dev, reg, width)); 126} 127 128static void 129pci_hostb_write_config(device_t dev, device_t child, int reg, 130 uint32_t val, int width) 131{ 132 133 pci_write_config(dev, reg, val, width); 134} 135 136static int 137pci_hostb_enable_busmaster(device_t dev, device_t child) 138{ 139 140 device_printf(dev, "child %s requested pci_enable_busmaster\n", 141 device_get_nameunit(child)); 142 return (pci_enable_busmaster(dev)); 143} 144 145static int 146pci_hostb_disable_busmaster(device_t dev, device_t child) 147{ 148 149 device_printf(dev, "child %s requested pci_disable_busmaster\n", 150 device_get_nameunit(child)); 151 return (pci_disable_busmaster(dev)); 152} 153 154static int 155pci_hostb_enable_io(device_t dev, device_t child, int space) 156{ 157 158 device_printf(dev, "child %s requested pci_enable_io\n", 159 device_get_nameunit(child)); 160 return (pci_enable_io(dev, space)); 161} 162 163static int 164pci_hostb_disable_io(device_t dev, device_t child, int space) 165{ 166 167 device_printf(dev, "child %s requested pci_disable_io\n", 168 device_get_nameunit(child)); 169 return (pci_disable_io(dev, space)); 170} 171 172static int 173pci_hostb_set_powerstate(device_t dev, device_t child, int state) 174{ 175 176 device_printf(dev, "child %s requested pci_set_powerstate\n", 177 device_get_nameunit(child)); 178 return (pci_set_powerstate(dev, state)); 179} 180 181static int 182pci_hostb_get_powerstate(device_t dev, device_t child) 183{ 184 185 device_printf(dev, "child %s requested pci_get_powerstate\n", 186 device_get_nameunit(child)); 187 return (pci_get_powerstate(dev)); 188} 189 190static int 191pci_hostb_assign_interrupt(device_t dev, device_t child) 192{ 193 194 device_printf(dev, "child %s requested pci_assign_interrupt\n", 195 device_get_nameunit(child)); 196 return (PCI_ASSIGN_INTERRUPT(device_get_parent(dev), dev)); 197} 198 199static int 200pci_hostb_find_cap(device_t dev, device_t child, int capability, 201 int *capreg) 202{ 203 204 return (pci_find_cap(dev, capability, capreg)); 205} 206 207static int 208pci_hostb_find_next_cap(device_t dev, device_t child, int capability, 209 int start, int *capreg) 210{ 211 212 return (pci_find_next_cap(dev, capability, start, capreg)); 213} 214 215static int 216pci_hostb_find_extcap(device_t dev, device_t child, int capability, 217 int *capreg) 218{ 219 220 return (pci_find_extcap(dev, capability, capreg)); 221} 222 223static int 224pci_hostb_find_next_extcap(device_t dev, device_t child, int capability, 225 int start, int *capreg) 226{ 227 228 return (pci_find_next_extcap(dev, capability, start, capreg)); 229} 230 231static int 232pci_hostb_find_htcap(device_t dev, device_t child, int capability, 233 int *capreg) 234{ 235 236 return (pci_find_htcap(dev, capability, capreg)); 237} 238 239static int 240pci_hostb_find_next_htcap(device_t dev, device_t child, int capability, 241 int start, int *capreg) 242{ 243 244 return (pci_find_next_htcap(dev, capability, start, capreg)); 245} 246 247static device_method_t pci_hostb_methods[] = { 248 /* Device interface */ 249 DEVMETHOD(device_probe, pci_hostb_probe), 250 DEVMETHOD(device_attach, pci_hostb_attach), 251 DEVMETHOD(device_shutdown, bus_generic_shutdown), 252 DEVMETHOD(device_suspend, bus_generic_suspend), 253 DEVMETHOD(device_resume, bus_generic_resume), 254 255 /* Bus interface */ 256 DEVMETHOD(bus_read_ivar, pci_hostb_read_ivar), 257 DEVMETHOD(bus_write_ivar, pci_hostb_write_ivar), 258 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 259 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 260 261 DEVMETHOD(bus_alloc_resource, pci_hostb_alloc_resource), 262 DEVMETHOD(bus_release_resource, pci_hostb_release_resource), 263 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 264 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 265 266 /* PCI interface */ 267 DEVMETHOD(pci_read_config, pci_hostb_read_config), 268 DEVMETHOD(pci_write_config, pci_hostb_write_config), 269 DEVMETHOD(pci_enable_busmaster, pci_hostb_enable_busmaster), 270 DEVMETHOD(pci_disable_busmaster, pci_hostb_disable_busmaster), 271 DEVMETHOD(pci_enable_io, pci_hostb_enable_io), 272 DEVMETHOD(pci_disable_io, pci_hostb_disable_io), 273 DEVMETHOD(pci_get_powerstate, pci_hostb_get_powerstate), 274 DEVMETHOD(pci_set_powerstate, pci_hostb_set_powerstate), 275 DEVMETHOD(pci_assign_interrupt, pci_hostb_assign_interrupt), 276 DEVMETHOD(pci_find_cap, pci_hostb_find_cap), 277 DEVMETHOD(pci_find_next_cap, pci_hostb_find_next_cap), 278 DEVMETHOD(pci_find_extcap, pci_hostb_find_extcap), 279 DEVMETHOD(pci_find_next_extcap, pci_hostb_find_next_extcap), 280 DEVMETHOD(pci_find_htcap, pci_hostb_find_htcap), 281 DEVMETHOD(pci_find_next_htcap, pci_hostb_find_next_htcap), 282 283 { 0, 0 } 284}; 285 286static driver_t pci_hostb_driver = { 287 "hostb", 288 pci_hostb_methods, 289 1, 290}; 291 292static devclass_t pci_hostb_devclass; 293 294DRIVER_MODULE(hostb, pci, pci_hostb_driver, pci_hostb_devclass, 0, 0); 295