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 <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/bus.h> 35 #include <sys/kernel.h> 36 #include <sys/malloc.h> 37 #include <sys/module.h> 38 39 #include "acpi.h" 40 #include <dev/acpica/acpivar.h> 41 42 #include <sys/pciio.h> 43 #include <dev/pci/pcireg.h> 44 #include <dev/pci/pcivar.h> 45 #include <dev/pci/pci_private.h> 46 47 #include "pcib_if.h" 48 #include "pci_if.h" 49 50 /* Hooks for the ACPI CA debugging infrastructure. */ 51 #define _COMPONENT ACPI_BUS 52 ACPI_MODULE_NAME("PCI") 53 54 struct acpi_pci_devinfo { 55 struct pci_devinfo ap_dinfo; 56 ACPI_HANDLE ap_handle; 57 int ap_flags; 58 }; 59 60 static int acpi_pci_attach(device_t dev); 61 static int acpi_pci_child_location_str_method(device_t cbdev, 62 device_t child, char *buf, size_t buflen); 63 static int acpi_pci_probe(device_t dev); 64 static int acpi_pci_read_ivar(device_t dev, device_t child, int which, 65 uintptr_t *result); 66 static int acpi_pci_write_ivar(device_t dev, device_t child, int which, 67 uintptr_t value); 68 static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, 69 void *context, void **status); 70 static int acpi_pci_set_powerstate_method(device_t dev, device_t child, 71 int state); 72 static void acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child); 73 74 static device_method_t acpi_pci_methods[] = { 75 /* Device interface */ 76 DEVMETHOD(device_probe, acpi_pci_probe), 77 DEVMETHOD(device_attach, acpi_pci_attach), 78 DEVMETHOD(device_shutdown, bus_generic_shutdown), 79 DEVMETHOD(device_suspend, pci_suspend), 80 DEVMETHOD(device_resume, pci_resume), 81 82 /* Bus interface */ 83 DEVMETHOD(bus_print_child, pci_print_child), 84 DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch), 85 DEVMETHOD(bus_read_ivar, acpi_pci_read_ivar), 86 DEVMETHOD(bus_write_ivar, acpi_pci_write_ivar), 87 DEVMETHOD(bus_driver_added, pci_driver_added), 88 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 89 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 90 91 DEVMETHOD(bus_get_resource_list,pci_get_resource_list), 92 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 93 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 94 DEVMETHOD(bus_delete_resource, pci_delete_resource), 95 DEVMETHOD(bus_alloc_resource, pci_alloc_resource), 96 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 97 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 98 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 99 DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method), 100 DEVMETHOD(bus_child_location_str, acpi_pci_child_location_str_method), 101 102 /* PCI interface */ 103 DEVMETHOD(pci_read_config, pci_read_config_method), 104 DEVMETHOD(pci_write_config, pci_write_config_method), 105 DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method), 106 DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method), 107 DEVMETHOD(pci_enable_io, pci_enable_io_method), 108 DEVMETHOD(pci_disable_io, pci_disable_io_method), 109 DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method), 110 DEVMETHOD(pci_set_powerstate, acpi_pci_set_powerstate_method), 111 DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_method), 112 113 { 0, 0 } 114 }; 115 116 static driver_t acpi_pci_driver = { 117 "pci", 118 acpi_pci_methods, 119 0, /* no softc */ 120 }; 121 122 DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0); 123 MODULE_DEPEND(acpi_pci, acpi, 1, 1, 1); 124 MODULE_DEPEND(acpi_pci, pci, 1, 1, 1); 125 MODULE_VERSION(acpi_pci, 1); 126 127 static int 128 acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 129 { 130 struct acpi_pci_devinfo *dinfo; 131 132 dinfo = device_get_ivars(child); 133 switch (which) { 134 case ACPI_IVAR_HANDLE: 135 *result = (uintptr_t)dinfo->ap_handle; 136 return (0); 137 case ACPI_IVAR_FLAGS: 138 *result = (uintptr_t)dinfo->ap_flags; 139 return (0); 140 } 141 return (pci_read_ivar(dev, child, which, result)); 142 } 143 144 static int 145 acpi_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 146 { 147 struct acpi_pci_devinfo *dinfo; 148 149 dinfo = device_get_ivars(child); 150 switch (which) { 151 case ACPI_IVAR_HANDLE: 152 dinfo->ap_handle = (ACPI_HANDLE)value; 153 return (0); 154 case ACPI_IVAR_FLAGS: 155 dinfo->ap_flags = (int)value; 156 return (0); 157 } 158 return (pci_write_ivar(dev, child, which, value)); 159 } 160 161 static int 162 acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf, 163 size_t buflen) 164 { 165 struct acpi_pci_devinfo *dinfo = device_get_ivars(child); 166 167 pci_child_location_str_method(cbdev, child, buf, buflen); 168 169 if (dinfo->ap_handle) { 170 strlcat(buf, " handle=", buflen); 171 strlcat(buf, acpi_name(dinfo->ap_handle), buflen); 172 } 173 return (0); 174 } 175 176 /* 177 * PCI power manangement 178 */ 179 static int 180 acpi_pci_set_powerstate_method(device_t dev, device_t child, int state) 181 { 182 ACPI_HANDLE h; 183 ACPI_STATUS status; 184 int acpi_state, old_state, error; 185 186 switch (state) { 187 case PCI_POWERSTATE_D0: 188 acpi_state = ACPI_STATE_D0; 189 break; 190 case PCI_POWERSTATE_D1: 191 acpi_state = ACPI_STATE_D1; 192 break; 193 case PCI_POWERSTATE_D2: 194 acpi_state = ACPI_STATE_D2; 195 break; 196 case PCI_POWERSTATE_D3: 197 acpi_state = ACPI_STATE_D3; 198 break; 199 default: 200 return (EINVAL); 201 } 202 203 /* 204 * We set the state using PCI Power Management outside of setting 205 * the ACPI state. This means that when powering down a device, we 206 * first shut it down using PCI, and then using ACPI, which lets ACPI 207 * try to power down any Power Resources that are now no longer used. 208 * When powering up a device, we let ACPI set the state first so that 209 * it can enable any needed Power Resources before changing the PCI 210 * power state. 211 */ 212 old_state = pci_get_powerstate(child); 213 if (old_state < state) { 214 error = pci_set_powerstate_method(dev, child, state); 215 if (error) 216 return (error); 217 } 218 h = acpi_get_handle(child); 219 status = acpi_pwr_switch_consumer(h, acpi_state); 220 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) 221 device_printf(dev, 222 "Failed to set ACPI power state D%d on %s: %s\n", 223 acpi_state, acpi_name(h), AcpiFormatException(status)); 224 if (old_state > state) 225 return (pci_set_powerstate_method(dev, child, state)); 226 else 227 return (0); 228 } 229 230 static void 231 acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child) 232 { 233 ACPI_STATUS status; 234 device_t child; 235 236 /* 237 * Lookup and remove the unused device that acpi0 creates when it walks 238 * the namespace creating devices. 239 */ 240 child = acpi_get_device(handle); 241 if (child != NULL) { 242 KASSERT(!device_is_alive(child), ("%s: deleting alive child %s", 243 __func__, device_get_nameunit(child))); 244 KASSERT(device_get_parent(child) == 245 devclass_get_device(devclass_find("acpi"), 0), 246 ("%s: child (%s)'s parent is not acpi0", __func__, 247 acpi_name(handle))); 248 device_delete_child(device_get_parent(child), child); 249 } 250 251 /* 252 * Update ACPI-CA to use the PCI enumerated device_t for this handle. 253 */ 254 status = AcpiDetachData(handle, acpi_fake_objhandler); 255 if (ACPI_FAILURE(status)) 256 printf("WARNING: Unable to detach object data from %s - %s\n", 257 acpi_name(handle), AcpiFormatException(status)); 258 status = AcpiAttachData(handle, acpi_fake_objhandler, pci_child); 259 if (ACPI_FAILURE(status)) 260 printf("WARNING: Unable to attach object data to %s - %s\n", 261 acpi_name(handle), AcpiFormatException(status)); 262 } 263 264 static ACPI_STATUS 265 acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context, 266 void **status) 267 { 268 struct acpi_pci_devinfo *dinfo; 269 device_t *devlist; 270 int devcount, i, func, slot; 271 UINT32 address; 272 273 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 274 275 if (ACPI_FAILURE(acpi_GetInteger(handle, "_ADR", &address))) 276 return_ACPI_STATUS (AE_OK); 277 slot = address >> 16; 278 func = address & 0xffff; 279 if (device_get_children((device_t)context, &devlist, &devcount) != 0) 280 return_ACPI_STATUS (AE_OK); 281 for (i = 0; i < devcount; i++) { 282 dinfo = device_get_ivars(devlist[i]); 283 if (dinfo->ap_dinfo.cfg.func == func && 284 dinfo->ap_dinfo.cfg.slot == slot) { 285 dinfo->ap_handle = handle; 286 acpi_pci_update_device(handle, devlist[i]); 287 break; 288 } 289 } 290 free(devlist, M_TEMP); 291 return_ACPI_STATUS (AE_OK); 292 } 293 294 static int 295 acpi_pci_probe(device_t dev) 296 { 297 298 if (pcib_get_bus(dev) < 0) 299 return (ENXIO); 300 if (acpi_get_handle(dev) == NULL) 301 return (ENXIO); 302 device_set_desc(dev, "ACPI PCI bus"); 303 return (0); 304 } 305 306 static int 307 acpi_pci_attach(device_t dev) 308 { 309 int busno; 310 311 /* 312 * Since there can be multiple independantly numbered PCI 313 * busses on some large alpha systems, we can't use the unit 314 * number to decide what bus we are probing. We ask the parent 315 * pcib what our bus number is. 316 */ 317 busno = pcib_get_bus(dev); 318 if (bootverbose) 319 device_printf(dev, "physical bus=%d\n", busno); 320 321 /* 322 * First, PCI devices are added as in the normal PCI bus driver. 323 * Afterwards, the ACPI namespace under the bridge driver is 324 * walked to save ACPI handles to all the devices that appear in 325 * the ACPI namespace as immediate descendants of the bridge. 326 * 327 * XXX: Sometimes PCI devices show up in the ACPI namespace that 328 * pci_add_children() doesn't find. We currently just ignore 329 * these devices. 330 */ 331 pci_add_children(dev, busno, sizeof(struct acpi_pci_devinfo)); 332 AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1, 333 acpi_pci_save_handle, dev, NULL); 334 335 return (bus_generic_attach(dev)); 336 } 337