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