1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 /* 29 * Host to PCI and PCI to PCI bridge drivers that use the MP Table to route 30 * interrupts from PCI devices to I/O APICs. 31 */ 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/bus.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/rman.h> 39 40 #include <dev/pci/pcireg.h> 41 #include <dev/pci/pcivar.h> 42 #include <dev/pci/pcib_private.h> 43 #include <x86/mptable.h> 44 #include <x86/legacyvar.h> 45 #include <machine/pci_cfgreg.h> 46 47 #include "pcib_if.h" 48 49 /* Host to PCI bridge driver. */ 50 51 static int 52 mptable_hostb_probe(device_t dev) 53 { 54 55 if (pci_cfgregopen() == 0) 56 return (ENXIO); 57 if (mptable_pci_probe_table(legacy_get_pcibus(dev)) != 0) 58 return (ENXIO); 59 device_set_desc(dev, "MPTable Host-PCI bridge"); 60 return (0); 61 } 62 63 static int 64 mptable_hostb_attach(device_t dev) 65 { 66 67 mptable_pci_host_res_init(dev); 68 device_add_child(dev, "pci", DEVICE_UNIT_ANY); 69 return (bus_generic_attach(dev)); 70 } 71 72 static int 73 mptable_is_isa_range(rman_res_t start, rman_res_t end) 74 { 75 76 if (end >= 0x10000) 77 return (0); 78 if ((start & 0xfc00) != (end & 0xfc00)) 79 return (0); 80 start &= ~0xfc00; 81 end &= ~0xfc00; 82 return (start >= 0x100 && end <= 0x3ff); 83 } 84 85 static int 86 mptable_is_vga_range(rman_res_t start, rman_res_t end) 87 { 88 if (end >= 0x10000) 89 return (0); 90 if ((start & 0xfc00) != (end & 0xfc00)) 91 return (0); 92 start &= ~0xfc00; 93 end &= ~0xfc00; 94 return (pci_is_vga_ioport_range(start, end)); 95 } 96 97 static struct resource * 98 mptable_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid, 99 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 100 { 101 struct mptable_hostb_softc *sc; 102 103 if (type == PCI_RES_BUS) 104 return (pci_domain_alloc_bus(0, child, rid, start, end, count, 105 flags)); 106 sc = device_get_softc(dev); 107 if (type == SYS_RES_IOPORT && start + count - 1 == end) { 108 if (mptable_is_isa_range(start, end)) { 109 switch (sc->sc_decodes_isa_io) { 110 case -1: 111 return (NULL); 112 case 1: 113 return (bus_generic_alloc_resource(dev, child, 114 type, rid, start, end, count, flags)); 115 default: 116 break; 117 } 118 } 119 if (mptable_is_vga_range(start, end)) { 120 switch (sc->sc_decodes_vga_io) { 121 case -1: 122 return (NULL); 123 case 1: 124 return (bus_generic_alloc_resource(dev, child, 125 type, rid, start, end, count, flags)); 126 default: 127 break; 128 } 129 } 130 } 131 start = hostb_alloc_start(type, start, end, count); 132 return (pcib_host_res_alloc(&sc->sc_host_res, child, type, rid, start, 133 end, count, flags)); 134 } 135 136 static int 137 mptable_hostb_adjust_resource(device_t dev, device_t child, 138 struct resource *r, rman_res_t start, rman_res_t end) 139 { 140 struct mptable_hostb_softc *sc; 141 142 if (rman_get_type(r) == PCI_RES_BUS) 143 return (pci_domain_adjust_bus(0, child, r, start, end)); 144 sc = device_get_softc(dev); 145 return (pcib_host_res_adjust(&sc->sc_host_res, child, r, start, end)); 146 } 147 148 static device_method_t mptable_hostb_methods[] = { 149 /* Device interface */ 150 DEVMETHOD(device_probe, mptable_hostb_probe), 151 DEVMETHOD(device_attach, mptable_hostb_attach), 152 DEVMETHOD(device_shutdown, bus_generic_shutdown), 153 DEVMETHOD(device_suspend, bus_generic_suspend), 154 DEVMETHOD(device_resume, bus_generic_resume), 155 156 /* Bus interface */ 157 DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar), 158 DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar), 159 DEVMETHOD(bus_alloc_resource, mptable_hostb_alloc_resource), 160 DEVMETHOD(bus_adjust_resource, mptable_hostb_adjust_resource), 161 DEVMETHOD(bus_release_resource, legacy_pcib_release_resource), 162 DEVMETHOD(bus_activate_resource, legacy_pcib_activate_resource), 163 DEVMETHOD(bus_deactivate_resource, legacy_pcib_deactivate_resource), 164 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 165 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 166 167 /* pcib interface */ 168 DEVMETHOD(pcib_maxslots, legacy_pcib_maxslots), 169 DEVMETHOD(pcib_read_config, legacy_pcib_read_config), 170 DEVMETHOD(pcib_write_config, legacy_pcib_write_config), 171 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 172 DEVMETHOD(pcib_alloc_msi, legacy_pcib_alloc_msi), 173 DEVMETHOD(pcib_release_msi, pcib_release_msi), 174 DEVMETHOD(pcib_alloc_msix, legacy_pcib_alloc_msix), 175 DEVMETHOD(pcib_release_msix, pcib_release_msix), 176 DEVMETHOD(pcib_map_msi, legacy_pcib_map_msi), 177 178 DEVMETHOD_END 179 }; 180 181 DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 182 sizeof(struct mptable_hostb_softc)); 183 DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, 0, 0); 184 185 /* PCI to PCI bridge driver. */ 186 187 static int 188 mptable_pcib_probe(device_t dev) 189 { 190 int bus; 191 192 if ((pci_get_class(dev) != PCIC_BRIDGE) || 193 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) 194 return (ENXIO); 195 bus = pci_read_config(dev, PCIR_SECBUS_1, 1); 196 if (bus == 0) 197 return (ENXIO); 198 if (mptable_pci_probe_table(bus) != 0) 199 return (ENXIO); 200 device_set_desc(dev, "MPTable PCI-PCI bridge"); 201 return (-1000); 202 } 203 204 static device_method_t mptable_pcib_pci_methods[] = { 205 /* Device interface */ 206 DEVMETHOD(device_probe, mptable_pcib_probe), 207 208 /* pcib interface */ 209 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt), 210 {0, 0} 211 }; 212 213 DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods, 214 sizeof(struct pcib_softc), pcib_driver); 215 DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, 0, 0); 216