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 * $FreeBSD @169221 30 */ 31 32 /* 33 * Host to PCI and PCI to PCI bridge drivers that use the MP Table to route 34 * interrupts from PCI devices to I/O APICs. 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/bus.h> 40 #include <sys/kernel.h> 41 #include <sys/module.h> 42 43 #include <bus/pci/pcireg.h> 44 #include <bus/pci/pcivar.h> 45 #include <bus/pci/pcib_private.h> 46 47 #include <machine/mptable.h> 48 #include <machine_base/apic/ioapic.h> 49 50 #include "legacyvar.h" 51 #include "pci_cfgreg.h" 52 53 #include "pcib_if.h" 54 55 static int 56 mptable_pci_route_interrupt(device_t pcib, device_t dev, int pin) 57 { 58 int line, bus, slot, irq; 59 60 bus = pci_get_bus(dev); 61 slot = pci_get_slot(dev); 62 irq = pci_get_irq(dev); 63 64 line = mptable_pci_int_route(bus, slot, pin, -1); 65 if (line >= 0) 66 goto done; 67 68 /* 69 * MPTABLE does not provide interrupt routing 70 * for bus:slot:pin, ask parent about it then, 71 * i.e. PCI-PCI bridge interrupt pin swizzle. 72 */ 73 line = pcib_route_interrupt(pcib, dev, pin); 74 if (line != PCI_INVALID_IRQ) 75 return line; 76 77 /* 78 * No luck, try using the intline ... 79 * XXX this probably is broken 80 */ 81 line = mptable_pci_int_route(bus, slot, pin, irq); 82 if (line >= 0) 83 goto done; 84 85 kprintf("MPTABLE: Unable to route for bus %d slot %d INT%c\n", 86 bus, slot, 'A' + pin - 1); 87 return PCI_INVALID_IRQ; 88 89 done: 90 BUS_CONFIG_INTR(dev, dev, line, INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW); 91 return line; 92 } 93 94 /* Host to PCI bridge driver. */ 95 96 static int 97 mptable_hostb_probe(device_t dev) 98 { 99 if (!ioapic_enable) 100 return (ENXIO); 101 102 if (pci_cfgregopen() == 0) 103 return (ENXIO); 104 #ifdef notyet 105 if (mptable_pci_probe_table(pcib_get_bus(dev)) != 0) 106 return (ENXIO); 107 #endif 108 109 device_set_desc(dev, "MPTABLE Host-PCI bridge"); 110 return (0); 111 } 112 113 static int 114 mptable_hostb_attach(device_t dev) 115 { 116 117 device_add_child(dev, "pci", pcib_get_bus(dev)); 118 return (bus_generic_attach(dev)); 119 } 120 121 /* Pass MSI requests up to the nexus. */ 122 static int 123 mptable_hostb_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, 124 int *irqs, int cpuid) 125 { 126 device_t bus; 127 128 bus = device_get_parent(pcib); 129 return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount, 130 irqs, cpuid)); 131 } 132 133 static int 134 mptable_hostb_alloc_msix(device_t pcib, device_t dev, int *irq, int cpuid) 135 { 136 device_t bus; 137 138 bus = device_get_parent(pcib); 139 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq, cpuid)); 140 } 141 142 static int 143 mptable_hostb_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, 144 uint32_t *data, int cpuid) 145 { 146 device_t bus; 147 148 bus = device_get_parent(pcib); 149 return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data, 150 cpuid)); 151 } 152 153 static 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_print_child, bus_generic_print_child), 163 DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar), 164 DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar), 165 DEVMETHOD(bus_alloc_resource, legacy_pcib_alloc_resource), 166 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 167 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 168 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 169 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 170 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 171 172 /* pcib interface */ 173 DEVMETHOD(pcib_maxslots, legacy_pcib_maxslots), 174 DEVMETHOD(pcib_read_config, legacy_pcib_read_config), 175 DEVMETHOD(pcib_write_config, legacy_pcib_write_config), 176 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 177 DEVMETHOD(pcib_alloc_msi, mptable_hostb_alloc_msi), 178 DEVMETHOD(pcib_release_msi, pcib_release_msi), 179 DEVMETHOD(pcib_alloc_msix, mptable_hostb_alloc_msix), 180 DEVMETHOD(pcib_release_msix, pcib_release_msix), 181 DEVMETHOD(pcib_map_msi, mptable_hostb_map_msi), 182 183 DEVMETHOD_END 184 }; 185 186 static devclass_t hostb_devclass; 187 188 DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 1); 189 DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, NULL, NULL); 190 191 /* PCI to PCI bridge driver. */ 192 193 static int 194 mptable_pcib_probe(device_t dev) 195 { 196 int bus; 197 198 if (!ioapic_enable) 199 return (ENXIO); 200 201 if ((pci_get_class(dev) != PCIC_BRIDGE) || 202 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) 203 return (ENXIO); 204 bus = pci_read_config(dev, PCIR_SECBUS_1, 1); 205 if (bus == 0) 206 return (ENXIO); 207 #ifdef notyet 208 if (mptable_pci_probe_table(bus) != 0) 209 return (ENXIO); 210 #endif 211 device_set_desc(dev, "MPTABLE PCI-PCI bridge"); 212 return (-500); 213 } 214 215 static device_method_t mptable_pcib_pci_methods[] = { 216 /* Device interface */ 217 DEVMETHOD(device_probe, mptable_pcib_probe), 218 DEVMETHOD(device_attach, pcib_attach), 219 DEVMETHOD(device_shutdown, bus_generic_shutdown), 220 DEVMETHOD(device_suspend, bus_generic_suspend), 221 DEVMETHOD(device_resume, bus_generic_resume), 222 223 /* Bus interface */ 224 DEVMETHOD(bus_print_child, bus_generic_print_child), 225 DEVMETHOD(bus_read_ivar, pcib_read_ivar), 226 DEVMETHOD(bus_write_ivar, pcib_write_ivar), 227 DEVMETHOD(bus_alloc_resource, pcib_alloc_resource), 228 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 229 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 230 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 231 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 232 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 233 234 /* pcib interface */ 235 DEVMETHOD(pcib_maxslots, pcib_maxslots), 236 DEVMETHOD(pcib_read_config, pcib_read_config), 237 DEVMETHOD(pcib_write_config, pcib_write_config), 238 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 239 DEVMETHOD(pcib_alloc_msi, pcib_alloc_msi), 240 DEVMETHOD(pcib_release_msi, pcib_release_msi), 241 DEVMETHOD(pcib_alloc_msix, pcib_alloc_msix), 242 DEVMETHOD(pcib_release_msix, pcib_release_msix), 243 DEVMETHOD(pcib_map_msi, pcib_map_msi), 244 245 DEVMETHOD_END 246 }; 247 248 static devclass_t pcib_devclass; 249 250 DEFINE_CLASS_0(pcib, mptable_pcib_driver, mptable_pcib_pci_methods, 251 sizeof(struct pcib_softc)); 252 DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, NULL, NULL); 253