1 /* 2 * Copyright (c) 1997, Stefan Esser <se@freebsd.org> 3 * Copyright (c) 2000, Michael Smith <msmith@freebsd.org> 4 * Copyright (c) 2000, BSDi 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice unmodified, this list of conditions, and the following 12 * disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_bus.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bus.h> 37 #include <sys/kernel.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 41 #include "acpi.h" 42 43 #include <dev/acpica/acpivar.h> 44 45 #include <sys/pciio.h> 46 #include <dev/pci/pcireg.h> 47 #include <dev/pci/pcivar.h> 48 #include <dev/pci/pci_private.h> 49 50 #include "pcib_if.h" 51 #include "pci_if.h" 52 53 /* 54 * Hooks for the ACPI CA debugging infrastructure 55 */ 56 #define _COMPONENT ACPI_BUS 57 ACPI_MODULE_NAME("PCI") 58 59 struct acpi_pci_devinfo { 60 struct pci_devinfo ap_dinfo; 61 ACPI_HANDLE ap_handle; 62 }; 63 64 static int acpi_pci_probe(device_t dev); 65 static int acpi_pci_attach(device_t dev); 66 static int acpi_pci_read_ivar(device_t dev, device_t child, int which, 67 uintptr_t *result); 68 #if 0 69 static int acpi_pci_set_powerstate_method(device_t dev, device_t child, 70 int state); 71 static int acpi_pci_get_powerstate_method(device_t dev, device_t child); 72 #endif 73 static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, 74 void *context, void **status); 75 76 static device_method_t acpi_pci_methods[] = { 77 /* Device interface */ 78 DEVMETHOD(device_probe, acpi_pci_probe), 79 DEVMETHOD(device_attach, acpi_pci_attach), 80 DEVMETHOD(device_shutdown, bus_generic_shutdown), 81 DEVMETHOD(device_suspend, bus_generic_suspend), 82 DEVMETHOD(device_resume, pci_resume), 83 84 /* Bus interface */ 85 DEVMETHOD(bus_print_child, pci_print_child), 86 DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch), 87 DEVMETHOD(bus_read_ivar, acpi_pci_read_ivar), 88 DEVMETHOD(bus_write_ivar, pci_write_ivar), 89 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 90 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 91 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 92 93 DEVMETHOD(bus_get_resource_list,pci_get_resource_list), 94 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 95 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 96 DEVMETHOD(bus_delete_resource, pci_delete_resource), 97 DEVMETHOD(bus_alloc_resource, pci_alloc_resource), 98 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 99 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 100 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 101 DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method), 102 DEVMETHOD(bus_child_location_str, pci_child_location_str_method), 103 104 /* PCI interface */ 105 DEVMETHOD(pci_read_config, pci_read_config_method), 106 DEVMETHOD(pci_write_config, pci_write_config_method), 107 DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method), 108 DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method), 109 DEVMETHOD(pci_enable_io, pci_enable_io_method), 110 DEVMETHOD(pci_disable_io, pci_disable_io_method), 111 /* XXX: We should override these two. */ 112 DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method), 113 DEVMETHOD(pci_set_powerstate, pci_set_powerstate_method), 114 DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_method), 115 116 { 0, 0 } 117 }; 118 119 static driver_t acpi_pci_driver = { 120 "pci", 121 acpi_pci_methods, 122 0, /* no softc */ 123 }; 124 125 DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0); 126 MODULE_VERSION(acpi_pci, 1); 127 MODULE_DEPEND(acpi_pci, pci, 1, 1, 1); 128 129 static int 130 acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 131 { 132 struct acpi_pci_devinfo *dinfo; 133 134 switch (which) { 135 case ACPI_IVAR_HANDLE: 136 dinfo = device_get_ivars(child); 137 *result = (uintptr_t)dinfo->ap_handle; 138 return(0); 139 } 140 return(pci_read_ivar(dev, child, which, result)); 141 } 142 143 #if 0 144 /* 145 * PCI power manangement 146 */ 147 static int 148 acpi_pci_set_powerstate_method(device_t dev, device_t child, int state) 149 { 150 /* XXX: TODO */ 151 return (ENXIO); 152 } 153 154 static int 155 acpi_pci_get_powerstate_method(device_t dev, device_t child) 156 { 157 /* XXX: TODO */ 158 return (ENXIO); 159 } 160 #endif 161 162 static ACPI_STATUS 163 acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context, 164 void **status) 165 { 166 struct acpi_pci_devinfo *dinfo; 167 device_t *devlist; 168 int devcount, i, func, slot; 169 UINT32 address; 170 171 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 172 173 if (ACPI_FAILURE(acpi_EvaluateInteger(handle, "_ADR", &address))) 174 return_ACPI_STATUS(AE_OK); 175 slot = address >> 16; 176 func = address & 0xffff; 177 if (device_get_children((device_t)context, &devlist, &devcount) != 0) 178 return_ACPI_STATUS(AE_OK); 179 for (i = 0; i < devcount; i++) { 180 dinfo = device_get_ivars(devlist[i]); 181 if (dinfo->ap_dinfo.cfg.func == func && 182 dinfo->ap_dinfo.cfg.slot == slot) { 183 dinfo->ap_handle = handle; 184 free(devlist, M_TEMP); 185 return_ACPI_STATUS(AE_OK); 186 } 187 } 188 free(devlist, M_TEMP); 189 return_ACPI_STATUS(AE_OK); 190 } 191 192 static int 193 acpi_pci_probe(device_t dev) 194 { 195 196 if (pcib_get_bus(dev) < 0) 197 return (ENXIO); 198 199 device_set_desc(dev, "ACPI PCI bus"); 200 201 if (acpi_get_handle(dev) == NULL) 202 return (ENXIO); 203 return (0); 204 } 205 206 static int 207 acpi_pci_attach(device_t dev) 208 { 209 int busno; 210 211 /* 212 * Since there can be multiple independantly numbered PCI 213 * busses on some large alpha systems, we can't use the unit 214 * number to decide what bus we are probing. We ask the parent 215 * pcib what our bus number is. 216 */ 217 busno = pcib_get_bus(dev); 218 if (bootverbose) 219 device_printf(dev, "physical bus=%d\n", busno); 220 221 /* 222 * First, PCI devices are added as in the normal PCI bus driver. 223 * Afterwards, the ACPI namespace under the bridge driver is 224 * walked to save ACPI handles to all the devices that appear in 225 * the ACPI namespace as immediate descendants of the bridge. 226 * 227 * XXX: Sometimes PCI devices show up in the ACPI namespace that 228 * pci_add_children() doesn't find. We currently just ignore 229 * these devices. 230 */ 231 pci_add_children(dev, busno, sizeof(struct acpi_pci_devinfo)); 232 (void) AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1, 233 acpi_pci_save_handle, dev, NULL); 234 235 return (bus_generic_attach(dev)); 236 } 237