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("$FreeBSD$"); 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 55 static int 56 mptable_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 67 static int 68 mptable_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 requests up to the nexus. */ 76 static int 77 mptable_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 87 static int 88 mptable_hostb_alloc_msix(device_t pcib, device_t dev, int *irq) 89 { 90 device_t bus; 91 92 bus = device_get_parent(pcib); 93 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq)); 94 } 95 96 static int 97 mptable_hostb_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, 98 uint32_t *data) 99 { 100 device_t bus; 101 102 bus = device_get_parent(pcib); 103 return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data)); 104 } 105 106 static device_method_t mptable_hostb_methods[] = { 107 /* Device interface */ 108 DEVMETHOD(device_probe, mptable_hostb_probe), 109 DEVMETHOD(device_attach, mptable_hostb_attach), 110 DEVMETHOD(device_shutdown, bus_generic_shutdown), 111 DEVMETHOD(device_suspend, bus_generic_suspend), 112 DEVMETHOD(device_resume, bus_generic_resume), 113 114 /* Bus interface */ 115 DEVMETHOD(bus_print_child, bus_generic_print_child), 116 DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar), 117 DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar), 118 DEVMETHOD(bus_alloc_resource, legacy_pcib_alloc_resource), 119 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 120 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 121 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 122 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 123 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 124 125 /* pcib interface */ 126 DEVMETHOD(pcib_maxslots, legacy_pcib_maxslots), 127 DEVMETHOD(pcib_read_config, legacy_pcib_read_config), 128 DEVMETHOD(pcib_write_config, legacy_pcib_write_config), 129 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 130 DEVMETHOD(pcib_alloc_msi, mptable_hostb_alloc_msi), 131 DEVMETHOD(pcib_release_msi, pcib_release_msi), 132 DEVMETHOD(pcib_alloc_msix, mptable_hostb_alloc_msix), 133 DEVMETHOD(pcib_release_msix, pcib_release_msix), 134 DEVMETHOD(pcib_map_msi, mptable_hostb_map_msi), 135 136 { 0, 0 } 137 }; 138 139 static devclass_t hostb_devclass; 140 141 DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 1); 142 DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0); 143 144 /* PCI to PCI bridge driver. */ 145 146 static int 147 mptable_pcib_probe(device_t dev) 148 { 149 int bus; 150 151 if ((pci_get_class(dev) != PCIC_BRIDGE) || 152 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) 153 return (ENXIO); 154 bus = pci_read_config(dev, PCIR_SECBUS_1, 1); 155 if (bus == 0) 156 return (ENXIO); 157 if (mptable_pci_probe_table(bus) != 0) 158 return (ENXIO); 159 device_set_desc(dev, "MPTable PCI-PCI bridge"); 160 return (-1000); 161 } 162 163 static device_method_t mptable_pcib_pci_methods[] = { 164 /* Device interface */ 165 DEVMETHOD(device_probe, mptable_pcib_probe), 166 167 /* pcib interface */ 168 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 169 170 {0, 0} 171 }; 172 173 static devclass_t pcib_devclass; 174 175 DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods, 176 sizeof(struct pcib_softc), pcib_driver); 177 DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0); 178