mptable_pci.c revision 165128
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/i386/i386/mptable_pci.c 165128 2006-12-12 19:27:01Z jhb $"); 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 44#include <dev/pci/pcireg.h> 45#include <dev/pci/pcivar.h> 46#include <dev/pci/pcib_private.h> 47#include <machine/legacyvar.h> 48#include <machine/mptable.h> 49#include <machine/pci_cfgreg.h> 50 51#include "pcib_if.h" 52 53/* Host to PCI bridge driver. */ 54 55static int 56mptable_hostb_probe(device_t dev) 57{ 58 59 if (pci_cfgregopen() == 0) 60 return (ENXIO); 61 if (mptable_pci_probe_table(pcib_get_bus(dev)) != 0) 62 return (ENXIO); 63 device_set_desc(dev, "MPTable Host-PCI bridge"); 64 return (0); 65} 66 67static int 68mptable_hostb_attach(device_t dev) 69{ 70 71 device_add_child(dev, "pci", pcib_get_bus(dev)); 72 return (bus_generic_attach(dev)); 73} 74 75/* Pass MSI alloc requests up to the nexus. */ 76static int 77mptable_hostb_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, 78 int *irqs) 79{ 80 device_t bus; 81 82 bus = device_get_parent(pcib); 83 return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount, 84 irqs)); 85} 86 87static int 88mptable_hostb_alloc_msix(device_t pcib, device_t dev, int index, int *irq) 89{ 90 device_t bus; 91 92 bus = device_get_parent(pcib); 93 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, index, irq)); 94} 95 96static device_method_t mptable_hostb_methods[] = { 97 /* Device interface */ 98 DEVMETHOD(device_probe, mptable_hostb_probe), 99 DEVMETHOD(device_attach, mptable_hostb_attach), 100 DEVMETHOD(device_shutdown, bus_generic_shutdown), 101 DEVMETHOD(device_suspend, bus_generic_suspend), 102 DEVMETHOD(device_resume, bus_generic_resume), 103 104 /* Bus interface */ 105 DEVMETHOD(bus_print_child, bus_generic_print_child), 106 DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar), 107 DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar), 108 DEVMETHOD(bus_alloc_resource, legacy_pcib_alloc_resource), 109 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 110 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 111 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 112 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 113 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 114 115 /* pcib interface */ 116 DEVMETHOD(pcib_maxslots, legacy_pcib_maxslots), 117 DEVMETHOD(pcib_read_config, legacy_pcib_read_config), 118 DEVMETHOD(pcib_write_config, legacy_pcib_write_config), 119 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 120 DEVMETHOD(pcib_alloc_msi, mptable_hostb_alloc_msi), 121 DEVMETHOD(pcib_release_msi, pcib_release_msi), 122 DEVMETHOD(pcib_alloc_msix, mptable_hostb_alloc_msix), 123 DEVMETHOD(pcib_release_msix, pcib_release_msix), 124 125 { 0, 0 } 126}; 127 128static devclass_t hostb_devclass; 129 130DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 1); 131DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0); 132 133/* PCI to PCI bridge driver. */ 134 135static int 136mptable_pcib_probe(device_t dev) 137{ 138 int bus; 139 140 if ((pci_get_class(dev) != PCIC_BRIDGE) || 141 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) 142 return (ENXIO); 143 bus = pci_read_config(dev, PCIR_SECBUS_1, 1); 144 if (bus == 0) 145 return (ENXIO); 146 if (mptable_pci_probe_table(bus) != 0) 147 return (ENXIO); 148 device_set_desc(dev, "MPTable PCI-PCI bridge"); 149 return (-1000); 150} 151 152static device_method_t mptable_pcib_pci_methods[] = { 153 /* Device interface */ 154 DEVMETHOD(device_probe, mptable_pcib_probe), 155 DEVMETHOD(device_attach, pcib_attach), 156 DEVMETHOD(device_shutdown, bus_generic_shutdown), 157 DEVMETHOD(device_suspend, bus_generic_suspend), 158 DEVMETHOD(device_resume, bus_generic_resume), 159 160 /* Bus interface */ 161 DEVMETHOD(bus_print_child, bus_generic_print_child), 162 DEVMETHOD(bus_read_ivar, pcib_read_ivar), 163 DEVMETHOD(bus_write_ivar, pcib_write_ivar), 164 DEVMETHOD(bus_alloc_resource, pcib_alloc_resource), 165 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 166 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 167 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 168 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 169 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 170 171 /* pcib interface */ 172 DEVMETHOD(pcib_maxslots, pcib_maxslots), 173 DEVMETHOD(pcib_read_config, pcib_read_config), 174 DEVMETHOD(pcib_write_config, pcib_write_config), 175 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 176 DEVMETHOD(pcib_alloc_msi, pcib_alloc_msi), 177 DEVMETHOD(pcib_release_msi, pcib_release_msi), 178 DEVMETHOD(pcib_alloc_msix, pcib_alloc_msix), 179 DEVMETHOD(pcib_release_msix, pcib_release_msix), 180 181 {0, 0} 182}; 183 184static devclass_t pcib_devclass; 185 186DEFINE_CLASS_0(pcib, mptable_pcib_driver, mptable_pcib_pci_methods, 187 sizeof(struct pcib_softc)); 188DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0); 189