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/smp.h> 48 49 #include "legacyvar.h" 50 #include "pci_cfgreg.h" 51 52 #include "pcib_if.h" 53 54 static int 55 mptable_pci_route_interrupt(device_t pcib, device_t dev, int pin) 56 { 57 int line, bus, slot; 58 59 bus = pci_get_bus(dev); 60 slot = pci_get_slot(dev); 61 62 line = pci_apic_irq(bus, slot, pin); 63 if (line >= 0) { 64 return line; 65 } else { 66 int irq = pci_get_irq(dev); 67 68 /* 69 * PCI interrupts might be redirected to the 70 * ISA bus according to some MP tables. Use the 71 * same methods as used by the ISA devices 72 * devices to find the proper IOAPIC int pin. 73 */ 74 kprintf("MPTable: Try routing through ISA bus for " 75 "bus %d slot %d INT%c irq %d\n", 76 bus, slot, 'A' + pin - 1, irq); 77 line = isa_apic_irq(irq); 78 if (line >= 0) 79 return line; 80 } 81 82 kprintf("MPTable: Unable to route for bus %d slot %d INT%c\n", 83 bus, slot, 'A' + pin - 1); 84 return PCI_INVALID_IRQ; 85 } 86 87 /* Host to PCI bridge driver. */ 88 89 static int 90 mptable_hostb_probe(device_t dev) 91 { 92 93 if (pci_cfgregopen() == 0) 94 return (ENXIO); 95 #ifdef notyet 96 if (mptable_pci_probe_table(pcib_get_bus(dev)) != 0) 97 return (ENXIO); 98 #endif 99 device_set_desc(dev, "MPTable Host-PCI bridge"); 100 return (0); 101 } 102 103 static int 104 mptable_hostb_attach(device_t dev) 105 { 106 107 device_add_child(dev, "pci", pcib_get_bus(dev)); 108 return (bus_generic_attach(dev)); 109 } 110 111 /* Pass MSI requests up to the nexus. */ 112 static int 113 mptable_hostb_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, 114 int *irqs) 115 { 116 device_t bus; 117 118 bus = device_get_parent(pcib); 119 return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount, 120 irqs)); 121 } 122 123 static int 124 mptable_hostb_alloc_msix(device_t pcib, device_t dev, int *irq) 125 { 126 device_t bus; 127 128 bus = device_get_parent(pcib); 129 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq)); 130 } 131 132 static int 133 mptable_hostb_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, 134 uint32_t *data) 135 { 136 device_t bus; 137 138 bus = device_get_parent(pcib); 139 return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data)); 140 } 141 142 static device_method_t mptable_hostb_methods[] = { 143 /* Device interface */ 144 DEVMETHOD(device_probe, mptable_hostb_probe), 145 DEVMETHOD(device_attach, mptable_hostb_attach), 146 DEVMETHOD(device_shutdown, bus_generic_shutdown), 147 DEVMETHOD(device_suspend, bus_generic_suspend), 148 DEVMETHOD(device_resume, bus_generic_resume), 149 150 /* Bus interface */ 151 DEVMETHOD(bus_print_child, bus_generic_print_child), 152 DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar), 153 DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar), 154 DEVMETHOD(bus_alloc_resource, legacy_pcib_alloc_resource), 155 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 156 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 157 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 158 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 159 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 160 161 /* pcib interface */ 162 DEVMETHOD(pcib_maxslots, legacy_pcib_maxslots), 163 DEVMETHOD(pcib_read_config, legacy_pcib_read_config), 164 DEVMETHOD(pcib_write_config, legacy_pcib_write_config), 165 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 166 DEVMETHOD(pcib_alloc_msi, mptable_hostb_alloc_msi), 167 DEVMETHOD(pcib_release_msi, pcib_release_msi), 168 DEVMETHOD(pcib_alloc_msix, mptable_hostb_alloc_msix), 169 DEVMETHOD(pcib_release_msix, pcib_release_msix), 170 DEVMETHOD(pcib_map_msi, mptable_hostb_map_msi), 171 172 { 0, 0 } 173 }; 174 175 static devclass_t hostb_devclass; 176 177 DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 1); 178 DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0); 179 180 /* PCI to PCI bridge driver. */ 181 182 static int 183 mptable_pcib_probe(device_t dev) 184 { 185 int bus; 186 187 if ((pci_get_class(dev) != PCIC_BRIDGE) || 188 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) 189 return (ENXIO); 190 bus = pci_read_config(dev, PCIR_SECBUS_1, 1); 191 if (bus == 0) 192 return (ENXIO); 193 #ifdef notyet 194 if (mptable_pci_probe_table(bus) != 0) 195 return (ENXIO); 196 #endif 197 device_set_desc(dev, "MPTable PCI-PCI bridge"); 198 return (-500); 199 } 200 201 static device_method_t mptable_pcib_pci_methods[] = { 202 /* Device interface */ 203 DEVMETHOD(device_probe, mptable_pcib_probe), 204 DEVMETHOD(device_attach, pcib_attach), 205 DEVMETHOD(device_shutdown, bus_generic_shutdown), 206 DEVMETHOD(device_suspend, bus_generic_suspend), 207 DEVMETHOD(device_resume, bus_generic_resume), 208 209 /* Bus interface */ 210 DEVMETHOD(bus_print_child, bus_generic_print_child), 211 DEVMETHOD(bus_read_ivar, pcib_read_ivar), 212 DEVMETHOD(bus_write_ivar, pcib_write_ivar), 213 DEVMETHOD(bus_alloc_resource, pcib_alloc_resource), 214 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 215 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 216 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 217 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 218 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 219 220 /* pcib interface */ 221 DEVMETHOD(pcib_maxslots, pcib_maxslots), 222 DEVMETHOD(pcib_read_config, pcib_read_config), 223 DEVMETHOD(pcib_write_config, pcib_write_config), 224 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 225 DEVMETHOD(pcib_alloc_msi, pcib_alloc_msi), 226 DEVMETHOD(pcib_release_msi, pcib_release_msi), 227 DEVMETHOD(pcib_alloc_msix, pcib_alloc_msix), 228 DEVMETHOD(pcib_release_msix, pcib_release_msix), 229 DEVMETHOD(pcib_map_msi, pcib_map_msi), 230 231 {0, 0} 232 }; 233 234 static devclass_t pcib_devclass; 235 236 DEFINE_CLASS_0(pcib, mptable_pcib_driver, mptable_pcib_pci_methods, 237 sizeof(struct pcib_softc)); 238 DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0); 239