mptable_pci.c revision 227843
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 227843 2011-11-22 21:28:20Z marius $"); 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 <machine/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/* Pass MSI requests up to the nexus. */ 80static int 81mptable_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 91static int 92mptable_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 100static int 101mptable_hostb_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, 102 uint32_t *data) 103{ 104 device_t bus; 105 106 bus = device_get_parent(pcib); 107 return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data)); 108} 109 110#ifdef NEW_PCIB 111static int 112mptable_is_isa_range(u_long start, u_long end) 113{ 114 115 if (end >= 0x10000) 116 return (0); 117 if ((start & 0xfc00) != (end & 0xfc00)) 118 return (0); 119 start &= ~0xfc00; 120 end &= ~0xfc00; 121 return (start >= 0x100 && end <= 0x3ff); 122} 123 124static int 125mptable_is_vga_range(u_long start, u_long end) 126{ 127 if (end >= 0x10000) 128 return (0); 129 if ((start & 0xfc00) != (end & 0xfc00)) 130 return (0); 131 start &= ~0xfc00; 132 end &= ~0xfc00; 133 return (pci_is_vga_ioport_range(start, end)); 134} 135 136static struct resource * 137mptable_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid, 138 u_long start, u_long end, u_long count, u_int flags) 139{ 140 struct mptable_hostb_softc *sc; 141 142 sc = device_get_softc(dev); 143 if (type == SYS_RES_IOPORT && start + count - 1 == end) { 144 if (mptable_is_isa_range(start, end)) { 145 switch (sc->sc_decodes_isa_io) { 146 case -1: 147 return (NULL); 148 case 1: 149 return (bus_generic_alloc_resource(dev, child, 150 type, rid, start, end, count, flags)); 151 default: 152 break; 153 } 154 } 155 if (mptable_is_vga_range(start, end)) { 156 switch (sc->sc_decodes_vga_io) { 157 case -1: 158 return (NULL); 159 case 1: 160 return (bus_generic_alloc_resource(dev, child, 161 type, rid, start, end, count, flags)); 162 default: 163 break; 164 } 165 } 166 } 167 start = hostb_alloc_start(type, start, end, count); 168 return (pcib_host_res_alloc(&sc->sc_host_res, child, type, rid, start, 169 end, count, flags)); 170} 171 172static int 173mptable_hostb_adjust_resource(device_t dev, device_t child, int type, 174 struct resource *r, u_long start, u_long end) 175{ 176 struct mptable_hostb_softc *sc; 177 178 sc = device_get_softc(dev); 179 return (pcib_host_res_adjust(&sc->sc_host_res, child, type, r, start, 180 end)); 181} 182#endif 183 184static device_method_t mptable_hostb_methods[] = { 185 /* Device interface */ 186 DEVMETHOD(device_probe, mptable_hostb_probe), 187 DEVMETHOD(device_attach, mptable_hostb_attach), 188 DEVMETHOD(device_shutdown, bus_generic_shutdown), 189 DEVMETHOD(device_suspend, bus_generic_suspend), 190 DEVMETHOD(device_resume, bus_generic_resume), 191 192 /* Bus interface */ 193 DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar), 194 DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar), 195#ifdef NEW_PCIB 196 DEVMETHOD(bus_alloc_resource, mptable_hostb_alloc_resource), 197 DEVMETHOD(bus_adjust_resource, mptable_hostb_adjust_resource), 198#else 199 DEVMETHOD(bus_alloc_resource, legacy_pcib_alloc_resource), 200 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource), 201#endif 202 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 203 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 204 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 205 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 206 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 207 208 /* pcib interface */ 209 DEVMETHOD(pcib_maxslots, legacy_pcib_maxslots), 210 DEVMETHOD(pcib_read_config, legacy_pcib_read_config), 211 DEVMETHOD(pcib_write_config, legacy_pcib_write_config), 212 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 213 DEVMETHOD(pcib_alloc_msi, mptable_hostb_alloc_msi), 214 DEVMETHOD(pcib_release_msi, pcib_release_msi), 215 DEVMETHOD(pcib_alloc_msix, mptable_hostb_alloc_msix), 216 DEVMETHOD(pcib_release_msix, pcib_release_msix), 217 DEVMETHOD(pcib_map_msi, mptable_hostb_map_msi), 218 219 DEVMETHOD_END 220}; 221 222static devclass_t hostb_devclass; 223 224DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 225 sizeof(struct mptable_hostb_softc)); 226DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0); 227 228/* PCI to PCI bridge driver. */ 229 230static int 231mptable_pcib_probe(device_t dev) 232{ 233 int bus; 234 235 if ((pci_get_class(dev) != PCIC_BRIDGE) || 236 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) 237 return (ENXIO); 238 bus = pci_read_config(dev, PCIR_SECBUS_1, 1); 239 if (bus == 0) 240 return (ENXIO); 241 if (mptable_pci_probe_table(bus) != 0) 242 return (ENXIO); 243 device_set_desc(dev, "MPTable PCI-PCI bridge"); 244 return (-1000); 245} 246 247static device_method_t mptable_pcib_pci_methods[] = { 248 /* Device interface */ 249 DEVMETHOD(device_probe, mptable_pcib_probe), 250 251 /* pcib interface */ 252 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 253 254 {0, 0} 255}; 256 257static devclass_t pcib_devclass; 258 259DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods, 260 sizeof(struct pcib_softc), pcib_driver); 261DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0); 262