1 /*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following 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 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 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_acpi.h" 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/proc.h> 37 #include <sys/fcntl.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/bus.h> 41 #include <sys/conf.h> 42 #include <sys/ioccom.h> 43 #include <sys/reboot.h> 44 #include <sys/sysctl.h> 45 #include <sys/ctype.h> 46 #include <sys/linker.h> 47 #include <sys/power.h> 48 #include <sys/sbuf.h> 49 #include <sys/smp.h> 50 51 #include <machine/resource.h> 52 #include <machine/bus.h> 53 #include <sys/rman.h> 54 #include <isa/isavar.h> 55 #include <isa/pnpvar.h> 56 57 #include <contrib/dev/acpica/acpi.h> 58 #include <dev/acpica/acpivar.h> 59 #include <dev/acpica/acpiio.h> 60 #include <contrib/dev/acpica/achware.h> 61 #include <contrib/dev/acpica/acnamesp.h> 62 63 #include "pci_if.h" 64 #include <dev/pci/pcivar.h> 65 #include <dev/pci/pci_private.h> 66 67 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 68 69 /* Hooks for the ACPI CA debugging infrastructure */ 70 #define _COMPONENT ACPI_BUS 71 ACPI_MODULE_NAME("ACPI") 72 73 static d_open_t acpiopen; 74 static d_close_t acpiclose; 75 static d_ioctl_t acpiioctl; 76 77 static struct cdevsw acpi_cdevsw = { 78 .d_version = D_VERSION, 79 .d_open = acpiopen, 80 .d_close = acpiclose, 81 .d_ioctl = acpiioctl, 82 .d_name = "acpi", 83 }; 84 85 /* Global mutex for locking access to the ACPI subsystem. */ 86 struct mtx acpi_mutex; 87 88 /* Bitmap of device quirks. */ 89 int acpi_quirks; 90 91 static int acpi_modevent(struct module *mod, int event, void *junk); 92 static void acpi_identify(driver_t *driver, device_t parent); 93 static int acpi_probe(device_t dev); 94 static int acpi_attach(device_t dev); 95 static int acpi_suspend(device_t dev); 96 static int acpi_resume(device_t dev); 97 static int acpi_shutdown(device_t dev); 98 static device_t acpi_add_child(device_t bus, int order, const char *name, 99 int unit); 100 static int acpi_print_child(device_t bus, device_t child); 101 static void acpi_probe_nomatch(device_t bus, device_t child); 102 static void acpi_driver_added(device_t dev, driver_t *driver); 103 static int acpi_read_ivar(device_t dev, device_t child, int index, 104 uintptr_t *result); 105 static int acpi_write_ivar(device_t dev, device_t child, int index, 106 uintptr_t value); 107 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 108 static int acpi_sysres_alloc(device_t dev); 109 static struct resource_list_entry *acpi_sysres_find(device_t dev, int type, 110 u_long addr); 111 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 112 int type, int *rid, u_long start, u_long end, 113 u_long count, u_int flags); 114 static int acpi_release_resource(device_t bus, device_t child, int type, 115 int rid, struct resource *r); 116 static void acpi_delete_resource(device_t bus, device_t child, int type, 117 int rid); 118 static uint32_t acpi_isa_get_logicalid(device_t dev); 119 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 120 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 121 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 122 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 123 ACPI_BUFFER *ret); 124 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 125 int *dstate); 126 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 127 void *context, void **retval); 128 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 129 int max_depth, acpi_scan_cb_t user_fn, void *arg); 130 static int acpi_set_powerstate_method(device_t bus, device_t child, 131 int state); 132 static int acpi_isa_pnp_probe(device_t bus, device_t child, 133 struct isa_pnp_id *ids); 134 static void acpi_probe_children(device_t bus); 135 static int acpi_probe_order(ACPI_HANDLE handle, int *order); 136 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 137 void *context, void **status); 138 static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid); 139 static void acpi_shutdown_final(void *arg, int howto); 140 static void acpi_enable_fixed_events(struct acpi_softc *sc); 141 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 142 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 143 static int acpi_wake_prep_walk(int sstate); 144 static int acpi_wake_sysctl_walk(device_t dev); 145 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 146 static void acpi_system_eventhandler_sleep(void *arg, int state); 147 static void acpi_system_eventhandler_wakeup(void *arg, int state); 148 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 149 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 150 static int acpi_pm_func(u_long cmd, void *arg, ...); 151 static int acpi_child_location_str_method(device_t acdev, device_t child, 152 char *buf, size_t buflen); 153 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 154 char *buf, size_t buflen); 155 156 static device_method_t acpi_methods[] = { 157 /* Device interface */ 158 DEVMETHOD(device_identify, acpi_identify), 159 DEVMETHOD(device_probe, acpi_probe), 160 DEVMETHOD(device_attach, acpi_attach), 161 DEVMETHOD(device_shutdown, acpi_shutdown), 162 DEVMETHOD(device_detach, bus_generic_detach), 163 DEVMETHOD(device_suspend, acpi_suspend), 164 DEVMETHOD(device_resume, acpi_resume), 165 166 /* Bus interface */ 167 DEVMETHOD(bus_add_child, acpi_add_child), 168 DEVMETHOD(bus_print_child, acpi_print_child), 169 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 170 DEVMETHOD(bus_driver_added, acpi_driver_added), 171 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 172 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 173 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 174 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 175 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 176 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 177 DEVMETHOD(bus_release_resource, acpi_release_resource), 178 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 179 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 180 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 181 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 182 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 183 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 184 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 185 186 /* ACPI bus */ 187 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 188 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 189 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 190 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 191 192 /* PCI emulation */ 193 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 194 195 /* ISA emulation */ 196 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 197 198 {0, 0} 199 }; 200 201 static driver_t acpi_driver = { 202 "acpi", 203 acpi_methods, 204 sizeof(struct acpi_softc), 205 }; 206 207 static devclass_t acpi_devclass; 208 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 209 MODULE_VERSION(acpi, 1); 210 211 ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 212 213 /* Local pools for managing system resources for ACPI child devices. */ 214 static struct rman acpi_rman_io, acpi_rman_mem; 215 216 #define ACPI_MINIMUM_AWAKETIME 5 217 218 static const char* sleep_state_names[] = { 219 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 220 221 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, NULL, "ACPI debugging"); 222 static char acpi_ca_version[12]; 223 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 224 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 225 226 /* 227 * Allow override of whether methods execute in parallel or not. 228 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 229 * errors for AML that really can't handle parallel method execution. 230 * It is off by default since this breaks recursive methods and 231 * some IBMs use such code. 232 */ 233 static int acpi_serialize_methods; 234 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 235 236 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 237 static int acpi_do_powerstate = 1; 238 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 239 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 240 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 241 242 /* Allow users to override quirks. */ 243 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 244 245 /* 246 * ACPI can only be loaded as a module by the loader; activating it after 247 * system bootstrap time is not useful, and can be fatal to the system. 248 * It also cannot be unloaded, since the entire system bus heirarchy hangs 249 * off it. 250 */ 251 static int 252 acpi_modevent(struct module *mod, int event, void *junk) 253 { 254 switch (event) { 255 case MOD_LOAD: 256 if (!cold) { 257 printf("The ACPI driver cannot be loaded after boot.\n"); 258 return (EPERM); 259 } 260 break; 261 case MOD_UNLOAD: 262 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 263 return (EBUSY); 264 break; 265 default: 266 break; 267 } 268 return (0); 269 } 270 271 /* 272 * Perform early initialization. 273 */ 274 ACPI_STATUS 275 acpi_Startup(void) 276 { 277 static int started = 0; 278 int error, val; 279 280 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 281 282 /* Only run the startup code once. The MADT driver also calls this. */ 283 if (started) 284 return_VALUE (0); 285 started = 1; 286 287 /* Initialise the ACPI mutex */ 288 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 289 290 /* 291 * Set the globals from our tunables. This is needed because ACPI-CA 292 * uses UINT8 for some values and we have no tunable_byte. 293 */ 294 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 295 AcpiGbl_EnableInterpreterSlack = TRUE; 296 297 /* Start up the ACPI CA subsystem. */ 298 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 299 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 300 return_VALUE (error); 301 } 302 303 if (ACPI_FAILURE(error = AcpiLoadTables())) { 304 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 305 AcpiTerminate(); 306 return_VALUE (error); 307 } 308 309 /* Set up any quirks we have for this system. */ 310 if (acpi_quirks == 0) 311 acpi_table_quirks(&acpi_quirks); 312 313 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 314 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 315 acpi_quirks &= ~ACPI_Q_BROKEN; 316 if (acpi_quirks & ACPI_Q_BROKEN) { 317 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 318 AcpiTerminate(); 319 return_VALUE (AE_ERROR); 320 } 321 322 return_VALUE (AE_OK); 323 } 324 325 /* 326 * Detect ACPI, perform early initialisation 327 */ 328 static void 329 acpi_identify(driver_t *driver, device_t parent) 330 { 331 device_t child; 332 333 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 334 335 if (!cold) 336 return_VOID; 337 338 /* Check that we haven't been disabled with a hint. */ 339 if (resource_disabled("acpi", 0)) 340 return_VOID; 341 342 /* Make sure we're not being doubly invoked. */ 343 if (device_find_child(parent, "acpi", 0) != NULL) 344 return_VOID; 345 346 /* Initialize ACPI-CA. */ 347 if (ACPI_FAILURE(acpi_Startup())) 348 return_VOID; 349 350 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION); 351 352 /* Attach the actual ACPI device. */ 353 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 354 device_printf(parent, "device_identify failed\n"); 355 return_VOID; 356 } 357 } 358 359 /* 360 * Fetch some descriptive data from ACPI to put in our attach message. 361 */ 362 static int 363 acpi_probe(device_t dev) 364 { 365 ACPI_TABLE_HEADER th; 366 char buf[20]; 367 int error; 368 struct sbuf sb; 369 ACPI_STATUS status; 370 371 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 372 373 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 374 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 375 device_printf(dev, "probe failed, other PM system enabled.\n"); 376 return_VALUE (ENXIO); 377 } 378 379 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 380 device_printf(dev, "couldn't get XSDT header: %s\n", 381 AcpiFormatException(status)); 382 error = ENXIO; 383 } else { 384 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 385 sbuf_bcat(&sb, th.OemId, 6); 386 sbuf_trim(&sb); 387 sbuf_putc(&sb, ' '); 388 sbuf_bcat(&sb, th.OemTableId, 8); 389 sbuf_trim(&sb); 390 sbuf_finish(&sb); 391 device_set_desc_copy(dev, sbuf_data(&sb)); 392 sbuf_delete(&sb); 393 error = 0; 394 } 395 396 return_VALUE (error); 397 } 398 399 static int 400 acpi_attach(device_t dev) 401 { 402 struct acpi_softc *sc; 403 ACPI_STATUS status; 404 int error, state; 405 UINT32 flags; 406 UINT8 TypeA, TypeB; 407 char *env; 408 409 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 410 411 sc = device_get_softc(dev); 412 sc->acpi_dev = dev; 413 414 /* Initialize resource manager. */ 415 acpi_rman_io.rm_type = RMAN_ARRAY; 416 acpi_rman_io.rm_start = 0; 417 acpi_rman_io.rm_end = 0xffff; 418 acpi_rman_io.rm_descr = "I/O ports"; 419 if (rman_init(&acpi_rman_io) != 0) 420 panic("acpi rman_init IO ports failed"); 421 acpi_rman_mem.rm_type = RMAN_ARRAY; 422 acpi_rman_mem.rm_start = 0; 423 acpi_rman_mem.rm_end = ~0ul; 424 acpi_rman_mem.rm_descr = "I/O memory addresses"; 425 if (rman_init(&acpi_rman_mem) != 0) 426 panic("acpi rman_init memory failed"); 427 428 /* Install the default address space handlers. */ 429 error = ENXIO; 430 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 431 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 432 if (ACPI_FAILURE(status)) { 433 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 434 AcpiFormatException(status)); 435 goto out; 436 } 437 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 438 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 439 if (ACPI_FAILURE(status)) { 440 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 441 AcpiFormatException(status)); 442 goto out; 443 } 444 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 445 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 446 if (ACPI_FAILURE(status)) { 447 device_printf(dev, "could not initialise PciConfig handler: %s\n", 448 AcpiFormatException(status)); 449 goto out; 450 } 451 452 /* 453 * Note that some systems (specifically, those with namespace evaluation 454 * issues that require the avoidance of parts of the namespace) must 455 * avoid running _INI and _STA on everything, as well as dodging the final 456 * object init pass. 457 * 458 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 459 * 460 * XXX We should arrange for the object init pass after we have attached 461 * all our child devices, but on many systems it works here. 462 */ 463 flags = 0; 464 if (testenv("debug.acpi.avoid")) 465 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 466 467 /* Bring the hardware and basic handlers online. */ 468 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 469 device_printf(dev, "Could not enable ACPI: %s\n", 470 AcpiFormatException(status)); 471 goto out; 472 } 473 474 /* 475 * Call the ECDT probe function to provide EC functionality before 476 * the namespace has been evaluated. 477 * 478 * XXX This happens before the sysresource devices have been probed and 479 * attached so its resources come from nexus0. In practice, this isn't 480 * a problem but should be addressed eventually. 481 */ 482 acpi_ec_ecdt_probe(dev); 483 484 /* Bring device objects and regions online. */ 485 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 486 device_printf(dev, "Could not initialize ACPI objects: %s\n", 487 AcpiFormatException(status)); 488 goto out; 489 } 490 491 /* 492 * Setup our sysctl tree. 493 * 494 * XXX: This doesn't check to make sure that none of these fail. 495 */ 496 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 497 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 498 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 499 device_get_name(dev), CTLFLAG_RD, 0, ""); 500 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 501 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 502 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 503 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 504 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 505 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 506 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 507 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 508 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 509 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 510 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 511 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 512 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 513 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 514 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 515 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 516 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 517 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 518 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 519 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 520 &sc->acpi_sleep_delay, 0, "sleep delay"); 521 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 522 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 523 &sc->acpi_s4bios, 0, "S4BIOS mode"); 524 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 525 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 526 &sc->acpi_verbose, 0, "verbose mode"); 527 528 /* 529 * Default to 1 second before sleeping to give some machines time to 530 * stabilize. 531 */ 532 sc->acpi_sleep_delay = 1; 533 if (bootverbose) 534 sc->acpi_verbose = 1; 535 if ((env = getenv("hw.acpi.verbose")) != NULL) { 536 if (strcmp(env, "0") != 0) 537 sc->acpi_verbose = 1; 538 freeenv(env); 539 } 540 541 /* Only enable S4BIOS by default if the FACS says it is available. */ 542 if (AcpiGbl_FACS->S4Bios_f != 0) 543 sc->acpi_s4bios = 1; 544 545 /* 546 * Dispatch the default sleep state to devices. The lid switch is set 547 * to NONE by default to avoid surprising users. 548 */ 549 sc->acpi_power_button_sx = ACPI_STATE_S5; 550 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 551 sc->acpi_standby_sx = ACPI_STATE_S1; 552 sc->acpi_suspend_sx = ACPI_STATE_S3; 553 554 /* Pick the first valid sleep state for the sleep button default. */ 555 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 556 for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++) 557 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 558 sc->acpi_sleep_button_sx = state; 559 break; 560 } 561 562 acpi_enable_fixed_events(sc); 563 564 /* 565 * Scan the namespace and attach/initialise children. 566 */ 567 568 /* Register our shutdown handler. */ 569 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 570 SHUTDOWN_PRI_LAST); 571 572 /* 573 * Register our acpi event handlers. 574 * XXX should be configurable eg. via userland policy manager. 575 */ 576 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 577 sc, ACPI_EVENT_PRI_LAST); 578 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 579 sc, ACPI_EVENT_PRI_LAST); 580 581 /* Flag our initial states. */ 582 sc->acpi_enabled = 1; 583 sc->acpi_sstate = ACPI_STATE_S0; 584 sc->acpi_sleep_disabled = 0; 585 586 /* Create the control device */ 587 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 588 "acpi"); 589 sc->acpi_dev_t->si_drv1 = sc; 590 591 if ((error = acpi_machdep_init(dev))) 592 goto out; 593 594 /* Register ACPI again to pass the correct argument of pm_func. */ 595 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 596 597 if (!acpi_disabled("bus")) 598 acpi_probe_children(dev); 599 600 error = 0; 601 602 out: 603 return_VALUE (error); 604 } 605 606 static int 607 acpi_suspend(device_t dev) 608 { 609 device_t child, *devlist; 610 int error, i, numdevs, pstate; 611 612 GIANT_REQUIRED; 613 614 /* First give child devices a chance to suspend. */ 615 error = bus_generic_suspend(dev); 616 if (error) 617 return (error); 618 619 /* 620 * Now, set them into the appropriate power state, usually D3. If the 621 * device has an _SxD method for the next sleep state, use that power 622 * state instead. 623 */ 624 device_get_children(dev, &devlist, &numdevs); 625 for (i = 0; i < numdevs; i++) { 626 /* If the device is not attached, we've powered it down elsewhere. */ 627 child = devlist[i]; 628 if (!device_is_attached(child)) 629 continue; 630 631 /* 632 * Default to D3 for all sleep states. The _SxD method is optional 633 * so set the powerstate even if it's absent. 634 */ 635 pstate = PCI_POWERSTATE_D3; 636 error = acpi_device_pwr_for_sleep(device_get_parent(child), 637 child, &pstate); 638 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 639 pci_set_powerstate(child, pstate); 640 } 641 free(devlist, M_TEMP); 642 error = 0; 643 644 return (error); 645 } 646 647 static int 648 acpi_resume(device_t dev) 649 { 650 ACPI_HANDLE handle; 651 int i, numdevs; 652 device_t child, *devlist; 653 654 GIANT_REQUIRED; 655 656 /* 657 * Put all devices in D0 before resuming them. Call _S0D on each one 658 * since some systems expect this. 659 */ 660 device_get_children(dev, &devlist, &numdevs); 661 for (i = 0; i < numdevs; i++) { 662 child = devlist[i]; 663 handle = acpi_get_handle(child); 664 if (handle) 665 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 666 if (device_is_attached(child) && acpi_do_powerstate) 667 pci_set_powerstate(child, PCI_POWERSTATE_D0); 668 } 669 free(devlist, M_TEMP); 670 671 return (bus_generic_resume(dev)); 672 } 673 674 static int 675 acpi_shutdown(device_t dev) 676 { 677 678 GIANT_REQUIRED; 679 680 /* Allow children to shutdown first. */ 681 bus_generic_shutdown(dev); 682 683 /* 684 * Enable any GPEs that are able to power-on the system (i.e., RTC). 685 * Also, disable any that are not valid for this state (most). 686 */ 687 acpi_wake_prep_walk(ACPI_STATE_S5); 688 689 return (0); 690 } 691 692 /* 693 * Handle a new device being added 694 */ 695 static device_t 696 acpi_add_child(device_t bus, int order, const char *name, int unit) 697 { 698 struct acpi_device *ad; 699 device_t child; 700 701 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 702 return (NULL); 703 704 resource_list_init(&ad->ad_rl); 705 706 child = device_add_child_ordered(bus, order, name, unit); 707 if (child != NULL) 708 device_set_ivars(child, ad); 709 else 710 free(ad, M_ACPIDEV); 711 return (child); 712 } 713 714 static int 715 acpi_print_child(device_t bus, device_t child) 716 { 717 struct acpi_device *adev = device_get_ivars(child); 718 struct resource_list *rl = &adev->ad_rl; 719 int retval = 0; 720 721 retval += bus_print_child_header(bus, child); 722 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 723 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 724 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 725 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 726 if (device_get_flags(child)) 727 retval += printf(" flags %#x", device_get_flags(child)); 728 retval += bus_print_child_footer(bus, child); 729 730 return (retval); 731 } 732 733 /* 734 * If this device is an ACPI child but no one claimed it, attempt 735 * to power it off. We'll power it back up when a driver is added. 736 * 737 * XXX Disabled for now since many necessary devices (like fdc and 738 * ATA) don't claim the devices we created for them but still expect 739 * them to be powered up. 740 */ 741 static void 742 acpi_probe_nomatch(device_t bus, device_t child) 743 { 744 745 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 746 } 747 748 /* 749 * If a new driver has a chance to probe a child, first power it up. 750 * 751 * XXX Disabled for now (see acpi_probe_nomatch for details). 752 */ 753 static void 754 acpi_driver_added(device_t dev, driver_t *driver) 755 { 756 device_t child, *devlist; 757 int i, numdevs; 758 759 DEVICE_IDENTIFY(driver, dev); 760 device_get_children(dev, &devlist, &numdevs); 761 for (i = 0; i < numdevs; i++) { 762 child = devlist[i]; 763 if (device_get_state(child) == DS_NOTPRESENT) { 764 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 765 if (device_probe_and_attach(child) != 0) 766 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 767 } 768 } 769 free(devlist, M_TEMP); 770 } 771 772 /* Location hint for devctl(8) */ 773 static int 774 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 775 size_t buflen) 776 { 777 struct acpi_device *dinfo = device_get_ivars(child); 778 779 if (dinfo->ad_handle) 780 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 781 else 782 snprintf(buf, buflen, "unknown"); 783 return (0); 784 } 785 786 /* PnP information for devctl(8) */ 787 static int 788 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 789 size_t buflen) 790 { 791 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 792 ACPI_DEVICE_INFO *adinfo; 793 struct acpi_device *dinfo = device_get_ivars(child); 794 char *end; 795 int error; 796 797 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 798 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 799 if (error) 800 snprintf(buf, buflen, "unknown"); 801 else 802 snprintf(buf, buflen, "_HID=%s _UID=%lu", 803 (adinfo->Valid & ACPI_VALID_HID) ? 804 adinfo->HardwareId.Value : "none", 805 (adinfo->Valid & ACPI_VALID_UID) ? 806 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 807 if (adinfo) 808 AcpiOsFree(adinfo); 809 810 return (0); 811 } 812 813 /* 814 * Handle per-device ivars 815 */ 816 static int 817 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 818 { 819 struct acpi_device *ad; 820 821 if ((ad = device_get_ivars(child)) == NULL) { 822 printf("device has no ivars\n"); 823 return (ENOENT); 824 } 825 826 /* ACPI and ISA compatibility ivars */ 827 switch(index) { 828 case ACPI_IVAR_HANDLE: 829 *(ACPI_HANDLE *)result = ad->ad_handle; 830 break; 831 case ACPI_IVAR_MAGIC: 832 *(int *)result = ad->ad_magic; 833 break; 834 case ACPI_IVAR_PRIVATE: 835 *(void **)result = ad->ad_private; 836 break; 837 case ACPI_IVAR_FLAGS: 838 *(int *)result = ad->ad_flags; 839 break; 840 case ISA_IVAR_VENDORID: 841 case ISA_IVAR_SERIAL: 842 case ISA_IVAR_COMPATID: 843 *(int *)result = -1; 844 break; 845 case ISA_IVAR_LOGICALID: 846 *(int *)result = acpi_isa_get_logicalid(child); 847 break; 848 default: 849 return (ENOENT); 850 } 851 852 return (0); 853 } 854 855 static int 856 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 857 { 858 struct acpi_device *ad; 859 860 if ((ad = device_get_ivars(child)) == NULL) { 861 printf("device has no ivars\n"); 862 return (ENOENT); 863 } 864 865 switch(index) { 866 case ACPI_IVAR_HANDLE: 867 ad->ad_handle = (ACPI_HANDLE)value; 868 break; 869 case ACPI_IVAR_MAGIC: 870 ad->ad_magic = (int)value; 871 break; 872 case ACPI_IVAR_PRIVATE: 873 ad->ad_private = (void *)value; 874 break; 875 case ACPI_IVAR_FLAGS: 876 ad->ad_flags = (int)value; 877 break; 878 default: 879 panic("bad ivar write request (%d)", index); 880 return (ENOENT); 881 } 882 883 return (0); 884 } 885 886 /* 887 * Handle child resource allocation/removal 888 */ 889 static struct resource_list * 890 acpi_get_rlist(device_t dev, device_t child) 891 { 892 struct acpi_device *ad; 893 894 ad = device_get_ivars(child); 895 return (&ad->ad_rl); 896 } 897 898 /* 899 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 900 * duplicates, we merge any in the sysresource attach routine. 901 */ 902 static int 903 acpi_sysres_alloc(device_t dev) 904 { 905 struct resource *res; 906 struct resource_list *rl; 907 struct resource_list_entry *rle; 908 struct rman *rm; 909 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 910 device_t *children; 911 int child_count, i; 912 913 /* 914 * Probe/attach any sysresource devices. This would be unnecessary if we 915 * had multi-pass probe/attach. 916 */ 917 if (device_get_children(dev, &children, &child_count) != 0) 918 return (ENXIO); 919 for (i = 0; i < child_count; i++) { 920 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 921 device_probe_and_attach(children[i]); 922 } 923 free(children, M_TEMP); 924 925 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 926 STAILQ_FOREACH(rle, rl, link) { 927 if (rle->res != NULL) { 928 device_printf(dev, "duplicate resource for %lx\n", rle->start); 929 continue; 930 } 931 932 /* Only memory and IO resources are valid here. */ 933 switch (rle->type) { 934 case SYS_RES_IOPORT: 935 rm = &acpi_rman_io; 936 break; 937 case SYS_RES_MEMORY: 938 rm = &acpi_rman_mem; 939 break; 940 default: 941 continue; 942 } 943 944 /* Pre-allocate resource and add to our rman pool. */ 945 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 946 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 947 if (res != NULL) { 948 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 949 rle->res = res; 950 } else 951 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 952 rle->start, rle->count, rle->type); 953 } 954 return (0); 955 } 956 957 /* Find if we manage a given resource. */ 958 static struct resource_list_entry * 959 acpi_sysres_find(device_t dev, int type, u_long addr) 960 { 961 struct resource_list *rl; 962 struct resource_list_entry *rle; 963 964 ACPI_SERIAL_ASSERT(acpi); 965 966 /* We only consider IO and memory resources for our pool. */ 967 rle = NULL; 968 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY) 969 goto out; 970 971 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 972 STAILQ_FOREACH(rle, rl, link) { 973 if (type == rle->type && addr >= rle->start && 974 addr < rle->start + rle->count) 975 break; 976 } 977 978 out: 979 return (rle); 980 } 981 982 static struct resource * 983 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 984 u_long start, u_long end, u_long count, u_int flags) 985 { 986 ACPI_RESOURCE ares; 987 struct acpi_device *ad = device_get_ivars(child); 988 struct resource_list *rl = &ad->ad_rl; 989 struct resource_list_entry *rle; 990 struct resource *res; 991 struct rman *rm; 992 993 res = NULL; 994 ACPI_SERIAL_BEGIN(acpi); 995 996 /* 997 * If this is an allocation of the "default" range for a given RID, and 998 * we know what the resources for this device are (i.e., they're on the 999 * child's resource list), use those start/end values. 1000 */ 1001 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1002 rle = resource_list_find(rl, type, *rid); 1003 if (rle == NULL) 1004 goto out; 1005 start = rle->start; 1006 end = rle->end; 1007 count = rle->count; 1008 } 1009 1010 /* If we don't manage this address, pass the request up to the parent. */ 1011 rle = acpi_sysres_find(bus, type, start); 1012 if (rle == NULL) { 1013 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1014 start, end, count, flags); 1015 } else { 1016 1017 /* We only handle memory and IO resources through rman. */ 1018 switch (type) { 1019 case SYS_RES_IOPORT: 1020 rm = &acpi_rman_io; 1021 break; 1022 case SYS_RES_MEMORY: 1023 rm = &acpi_rman_mem; 1024 break; 1025 default: 1026 panic("acpi_alloc_resource: invalid res type %d", type); 1027 } 1028 1029 /* If we do know it, allocate it from the local pool. */ 1030 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1031 child); 1032 if (res == NULL) 1033 goto out; 1034 1035 /* Copy the bus tag and handle from the pre-allocated resource. */ 1036 rman_set_rid(res, *rid); 1037 rman_set_bustag(res, rman_get_bustag(rle->res)); 1038 rman_set_bushandle(res, rman_get_start(res)); 1039 1040 /* If requested, activate the resource using the parent's method. */ 1041 if (flags & RF_ACTIVE) 1042 if (bus_activate_resource(child, type, *rid, res) != 0) { 1043 rman_release_resource(res); 1044 res = NULL; 1045 goto out; 1046 } 1047 } 1048 1049 if (res != NULL && device_get_parent(child) == bus) 1050 switch (type) { 1051 case SYS_RES_IRQ: 1052 /* 1053 * Since bus_config_intr() takes immediate effect, we cannot 1054 * configure the interrupt associated with a device when we 1055 * parse the resources but have to defer it until a driver 1056 * actually allocates the interrupt via bus_alloc_resource(). 1057 * 1058 * XXX: Should we handle the lookup failing? 1059 */ 1060 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1061 acpi_config_intr(child, &ares); 1062 break; 1063 } 1064 1065 out: 1066 ACPI_SERIAL_END(acpi); 1067 return (res); 1068 } 1069 1070 static int 1071 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1072 struct resource *r) 1073 { 1074 int ret; 1075 1076 ACPI_SERIAL_BEGIN(acpi); 1077 1078 /* 1079 * If we know about this address, deactivate it and release it to the 1080 * local pool. If we don't, pass this request up to the parent. 1081 */ 1082 if (acpi_sysres_find(bus, type, rman_get_start(r)) == NULL) { 1083 if (rman_get_flags(r) & RF_ACTIVE) { 1084 ret = bus_deactivate_resource(child, type, rid, r); 1085 if (ret != 0) 1086 goto out; 1087 } 1088 ret = rman_release_resource(r); 1089 } else 1090 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1091 1092 out: 1093 ACPI_SERIAL_END(acpi); 1094 return (ret); 1095 } 1096 1097 static void 1098 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1099 { 1100 struct resource_list *rl; 1101 1102 rl = acpi_get_rlist(bus, child); 1103 resource_list_delete(rl, type, rid); 1104 } 1105 1106 /* Allocate an IO port or memory resource, given its GAS. */ 1107 int 1108 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1109 struct resource **res) 1110 { 1111 int error, res_type; 1112 1113 error = ENOMEM; 1114 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1115 return (EINVAL); 1116 1117 /* We only support memory and IO spaces. */ 1118 switch (gas->AddressSpaceId) { 1119 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1120 res_type = SYS_RES_MEMORY; 1121 break; 1122 case ACPI_ADR_SPACE_SYSTEM_IO: 1123 res_type = SYS_RES_IOPORT; 1124 break; 1125 default: 1126 return (EOPNOTSUPP); 1127 } 1128 1129 /* 1130 * If the register width is less than 8, assume the BIOS author means 1131 * it is a bit field and just allocate a byte. 1132 */ 1133 if (gas->RegisterBitWidth && gas->RegisterBitWidth < 8) 1134 gas->RegisterBitWidth = 8; 1135 1136 /* Validate the address after we're sure we support the space. */ 1137 if (!ACPI_VALID_ADDRESS(gas->Address) || gas->RegisterBitWidth == 0) 1138 return (EINVAL); 1139 1140 bus_set_resource(dev, res_type, *rid, gas->Address, 1141 gas->RegisterBitWidth / 8); 1142 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE); 1143 if (*res != NULL) { 1144 *type = res_type; 1145 error = 0; 1146 } else 1147 bus_delete_resource(dev, res_type, *rid); 1148 1149 return (error); 1150 } 1151 1152 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1153 static uint32_t 1154 acpi_isa_get_logicalid(device_t dev) 1155 { 1156 ACPI_DEVICE_INFO *devinfo; 1157 ACPI_BUFFER buf; 1158 ACPI_HANDLE h; 1159 ACPI_STATUS error; 1160 u_int32_t pnpid; 1161 1162 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1163 1164 pnpid = 0; 1165 buf.Pointer = NULL; 1166 buf.Length = ACPI_ALLOCATE_BUFFER; 1167 1168 /* Fetch and validate the HID. */ 1169 if ((h = acpi_get_handle(dev)) == NULL) 1170 goto out; 1171 error = AcpiGetObjectInfo(h, &buf); 1172 if (ACPI_FAILURE(error)) 1173 goto out; 1174 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1175 1176 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1177 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 1178 1179 out: 1180 if (buf.Pointer != NULL) 1181 AcpiOsFree(buf.Pointer); 1182 return_VALUE (pnpid); 1183 } 1184 1185 static int 1186 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1187 { 1188 ACPI_DEVICE_INFO *devinfo; 1189 ACPI_BUFFER buf; 1190 ACPI_HANDLE h; 1191 ACPI_STATUS error; 1192 uint32_t *pnpid; 1193 int valid, i; 1194 1195 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1196 1197 pnpid = cids; 1198 valid = 0; 1199 buf.Pointer = NULL; 1200 buf.Length = ACPI_ALLOCATE_BUFFER; 1201 1202 /* Fetch and validate the CID */ 1203 if ((h = acpi_get_handle(dev)) == NULL) 1204 goto out; 1205 error = AcpiGetObjectInfo(h, &buf); 1206 if (ACPI_FAILURE(error)) 1207 goto out; 1208 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1209 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1210 goto out; 1211 1212 if (devinfo->CompatibilityId.Count < count) 1213 count = devinfo->CompatibilityId.Count; 1214 for (i = 0; i < count; i++) { 1215 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 1216 continue; 1217 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 1218 valid++; 1219 } 1220 1221 out: 1222 if (buf.Pointer != NULL) 1223 AcpiOsFree(buf.Pointer); 1224 return_VALUE (valid); 1225 } 1226 1227 static char * 1228 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1229 { 1230 ACPI_HANDLE h; 1231 int i; 1232 1233 h = acpi_get_handle(dev); 1234 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1235 return (NULL); 1236 1237 /* Try to match one of the array of IDs with a HID or CID. */ 1238 for (i = 0; ids[i] != NULL; i++) { 1239 if (acpi_MatchHid(h, ids[i])) 1240 return (ids[i]); 1241 } 1242 return (NULL); 1243 } 1244 1245 static ACPI_STATUS 1246 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1247 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1248 { 1249 ACPI_HANDLE h; 1250 1251 if (dev == NULL) 1252 h = ACPI_ROOT_OBJECT; 1253 else if ((h = acpi_get_handle(dev)) == NULL) 1254 return (AE_BAD_PARAMETER); 1255 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1256 } 1257 1258 static int 1259 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1260 { 1261 struct acpi_softc *sc; 1262 ACPI_HANDLE handle; 1263 ACPI_STATUS status; 1264 char sxd[8]; 1265 int error; 1266 1267 sc = device_get_softc(bus); 1268 handle = acpi_get_handle(dev); 1269 1270 /* 1271 * XXX If we find these devices, don't try to power them down. 1272 * The serial and IRDA ports on my T23 hang the system when 1273 * set to D3 and it appears that such legacy devices may 1274 * need special handling in their drivers. 1275 */ 1276 if (handle == NULL || 1277 acpi_MatchHid(handle, "PNP0500") || 1278 acpi_MatchHid(handle, "PNP0501") || 1279 acpi_MatchHid(handle, "PNP0502") || 1280 acpi_MatchHid(handle, "PNP0510") || 1281 acpi_MatchHid(handle, "PNP0511")) 1282 return (ENXIO); 1283 1284 /* 1285 * Override next state with the value from _SxD, if present. If no 1286 * dstate argument was provided, don't fetch the return value. 1287 */ 1288 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1289 if (dstate) 1290 status = acpi_GetInteger(handle, sxd, dstate); 1291 else 1292 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1293 1294 switch (status) { 1295 case AE_OK: 1296 error = 0; 1297 break; 1298 case AE_NOT_FOUND: 1299 error = ESRCH; 1300 break; 1301 default: 1302 error = ENXIO; 1303 break; 1304 } 1305 1306 return (error); 1307 } 1308 1309 /* Callback arg for our implementation of walking the namespace. */ 1310 struct acpi_device_scan_ctx { 1311 acpi_scan_cb_t user_fn; 1312 void *arg; 1313 ACPI_HANDLE parent; 1314 }; 1315 1316 static ACPI_STATUS 1317 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1318 { 1319 struct acpi_device_scan_ctx *ctx; 1320 device_t dev, old_dev; 1321 ACPI_STATUS status; 1322 ACPI_OBJECT_TYPE type; 1323 1324 /* 1325 * Skip this device if we think we'll have trouble with it or it is 1326 * the parent where the scan began. 1327 */ 1328 ctx = (struct acpi_device_scan_ctx *)arg; 1329 if (acpi_avoid(h) || h == ctx->parent) 1330 return (AE_OK); 1331 1332 /* If this is not a valid device type (e.g., a method), skip it. */ 1333 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1334 return (AE_OK); 1335 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1336 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1337 return (AE_OK); 1338 1339 /* 1340 * Call the user function with the current device. If it is unchanged 1341 * afterwards, return. Otherwise, we update the handle to the new dev. 1342 */ 1343 old_dev = acpi_get_device(h); 1344 dev = old_dev; 1345 status = ctx->user_fn(h, &dev, level, ctx->arg); 1346 if (ACPI_FAILURE(status) || old_dev == dev) 1347 return (status); 1348 1349 /* Remove the old child and its connection to the handle. */ 1350 if (old_dev != NULL) { 1351 device_delete_child(device_get_parent(old_dev), old_dev); 1352 AcpiDetachData(h, acpi_fake_objhandler); 1353 } 1354 1355 /* Recreate the handle association if the user created a device. */ 1356 if (dev != NULL) 1357 AcpiAttachData(h, acpi_fake_objhandler, dev); 1358 1359 return (AE_OK); 1360 } 1361 1362 static ACPI_STATUS 1363 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1364 acpi_scan_cb_t user_fn, void *arg) 1365 { 1366 ACPI_HANDLE h; 1367 struct acpi_device_scan_ctx ctx; 1368 1369 if (acpi_disabled("children")) 1370 return (AE_OK); 1371 1372 if (dev == NULL) 1373 h = ACPI_ROOT_OBJECT; 1374 else if ((h = acpi_get_handle(dev)) == NULL) 1375 return (AE_BAD_PARAMETER); 1376 ctx.user_fn = user_fn; 1377 ctx.arg = arg; 1378 ctx.parent = h; 1379 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1380 acpi_device_scan_cb, &ctx, NULL)); 1381 } 1382 1383 /* 1384 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1385 * device power states since it's close enough to ACPI. 1386 */ 1387 static int 1388 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1389 { 1390 ACPI_HANDLE h; 1391 ACPI_STATUS status; 1392 int error; 1393 1394 error = 0; 1395 h = acpi_get_handle(child); 1396 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1397 return (EINVAL); 1398 if (h == NULL) 1399 return (0); 1400 1401 /* Ignore errors if the power methods aren't present. */ 1402 status = acpi_pwr_switch_consumer(h, state); 1403 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1404 && status != AE_BAD_PARAMETER) 1405 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1406 state, acpi_name(h), AcpiFormatException(status)); 1407 1408 return (error); 1409 } 1410 1411 static int 1412 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1413 { 1414 int result, cid_count, i; 1415 uint32_t lid, cids[8]; 1416 1417 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1418 1419 /* 1420 * ISA-style drivers attached to ACPI may persist and 1421 * probe manually if we return ENOENT. We never want 1422 * that to happen, so don't ever return it. 1423 */ 1424 result = ENXIO; 1425 1426 /* Scan the supplied IDs for a match */ 1427 lid = acpi_isa_get_logicalid(child); 1428 cid_count = acpi_isa_get_compatid(child, cids, 8); 1429 while (ids && ids->ip_id) { 1430 if (lid == ids->ip_id) { 1431 result = 0; 1432 goto out; 1433 } 1434 for (i = 0; i < cid_count; i++) { 1435 if (cids[i] == ids->ip_id) { 1436 result = 0; 1437 goto out; 1438 } 1439 } 1440 ids++; 1441 } 1442 1443 out: 1444 if (result == 0 && ids->ip_desc) 1445 device_set_desc(child, ids->ip_desc); 1446 1447 return_VALUE (result); 1448 } 1449 1450 /* 1451 * Scan all of the ACPI namespace and attach child devices. 1452 * 1453 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1454 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1455 * However, in violation of the spec, some systems place their PCI link 1456 * devices in \, so we have to walk the whole namespace. We check the 1457 * type of namespace nodes, so this should be ok. 1458 */ 1459 static void 1460 acpi_probe_children(device_t bus) 1461 { 1462 1463 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1464 1465 /* 1466 * Scan the namespace and insert placeholders for all the devices that 1467 * we find. We also probe/attach any early devices. 1468 * 1469 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1470 * we want to create nodes for all devices, not just those that are 1471 * currently present. (This assumes that we don't want to create/remove 1472 * devices as they appear, which might be smarter.) 1473 */ 1474 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1475 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1476 bus, NULL); 1477 1478 /* Pre-allocate resources for our rman from any sysresource devices. */ 1479 acpi_sysres_alloc(bus); 1480 1481 /* Create any static children by calling device identify methods. */ 1482 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1483 bus_generic_probe(bus); 1484 1485 /* Probe/attach all children, created staticly and from the namespace. */ 1486 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1487 bus_generic_attach(bus); 1488 1489 /* 1490 * Some of these children may have attached others as part of their attach 1491 * process (eg. the root PCI bus driver), so rescan. 1492 */ 1493 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1494 bus_generic_attach(bus); 1495 1496 /* Attach wake sysctls. */ 1497 acpi_wake_sysctl_walk(bus); 1498 1499 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1500 return_VOID; 1501 } 1502 1503 /* 1504 * Determine the probe order for a given device and return non-zero if it 1505 * should be attached immediately. 1506 */ 1507 static int 1508 acpi_probe_order(ACPI_HANDLE handle, int *order) 1509 { 1510 1511 /* 1512 * 1. I/O port and memory system resource holders 1513 * 2. Embedded controllers (to handle early accesses) 1514 * 3. PCI Link Devices 1515 */ 1516 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1517 *order = 1; 1518 else if (acpi_MatchHid(handle, "PNP0C09")) 1519 *order = 2; 1520 else if (acpi_MatchHid(handle, "PNP0C0F")) 1521 *order = 3; 1522 return (0); 1523 } 1524 1525 /* 1526 * Evaluate a child device and determine whether we might attach a device to 1527 * it. 1528 */ 1529 static ACPI_STATUS 1530 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1531 { 1532 ACPI_OBJECT_TYPE type; 1533 ACPI_HANDLE h; 1534 device_t bus, child; 1535 int order; 1536 char *handle_str, **search; 1537 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL}; 1538 1539 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1540 1541 /* Skip this device if we think we'll have trouble with it. */ 1542 if (acpi_avoid(handle)) 1543 return_ACPI_STATUS (AE_OK); 1544 1545 bus = (device_t)context; 1546 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1547 switch (type) { 1548 case ACPI_TYPE_DEVICE: 1549 case ACPI_TYPE_PROCESSOR: 1550 case ACPI_TYPE_THERMAL: 1551 case ACPI_TYPE_POWER: 1552 if (acpi_disabled("children")) 1553 break; 1554 1555 /* 1556 * Since we scan from \, be sure to skip system scope objects. 1557 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?) 1558 */ 1559 handle_str = acpi_name(handle); 1560 for (search = scopes; *search != NULL; search++) { 1561 if (strcmp(handle_str, *search) == 0) 1562 break; 1563 } 1564 if (*search != NULL) 1565 break; 1566 1567 /* 1568 * Create a placeholder device for this node. Sort the placeholder 1569 * so that the probe/attach passes will run breadth-first. Orders 1570 * less than 10 are reserved for special objects (i.e., system 1571 * resources). Larger values are used for all other devices. 1572 */ 1573 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1574 order = (level + 1) * 10; 1575 acpi_probe_order(handle, &order); 1576 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1577 if (child == NULL) 1578 break; 1579 1580 /* Associate the handle with the device_t and vice versa. */ 1581 acpi_set_handle(child, handle); 1582 AcpiAttachData(handle, acpi_fake_objhandler, child); 1583 1584 /* 1585 * Check that the device is present. If it's not present, 1586 * leave it disabled (so that we have a device_t attached to 1587 * the handle, but we don't probe it). 1588 * 1589 * XXX PCI link devices sometimes report "present" but not 1590 * "functional" (i.e. if disabled). Go ahead and probe them 1591 * anyway since we may enable them later. 1592 */ 1593 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1594 /* Never disable PCI link devices. */ 1595 if (acpi_MatchHid(handle, "PNP0C0F")) 1596 break; 1597 /* 1598 * Docking stations should remain enabled since the system 1599 * may be undocked at boot. 1600 */ 1601 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1602 break; 1603 1604 device_disable(child); 1605 break; 1606 } 1607 1608 /* 1609 * Get the device's resource settings and attach them. 1610 * Note that if the device has _PRS but no _CRS, we need 1611 * to decide when it's appropriate to try to configure the 1612 * device. Ignore the return value here; it's OK for the 1613 * device not to have any resources. 1614 */ 1615 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1616 break; 1617 } 1618 } 1619 1620 return_ACPI_STATUS (AE_OK); 1621 } 1622 1623 /* 1624 * AcpiAttachData() requires an object handler but never uses it. This is a 1625 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1626 */ 1627 void 1628 acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data) 1629 { 1630 } 1631 1632 static void 1633 acpi_shutdown_final(void *arg, int howto) 1634 { 1635 ACPI_STATUS status; 1636 1637 /* 1638 * XXX Shutdown code should only run on the BSP (cpuid 0). 1639 * Some chipsets do not power off the system correctly if called from 1640 * an AP. 1641 */ 1642 if ((howto & RB_POWEROFF) != 0) { 1643 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1644 if (ACPI_FAILURE(status)) { 1645 printf("AcpiEnterSleepStatePrep failed - %s\n", 1646 AcpiFormatException(status)); 1647 return; 1648 } 1649 printf("Powering system off using ACPI\n"); 1650 ACPI_DISABLE_IRQS(); 1651 status = AcpiEnterSleepState(ACPI_STATE_S5); 1652 if (ACPI_FAILURE(status)) { 1653 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1654 } else { 1655 DELAY(1000000); 1656 printf("ACPI power-off failed - timeout\n"); 1657 } 1658 } else if ((howto & RB_AUTOBOOT) != 0 && AcpiGbl_FADT->ResetRegSup) { 1659 status = AcpiHwLowLevelWrite( 1660 AcpiGbl_FADT->ResetRegister.RegisterBitWidth, 1661 AcpiGbl_FADT->ResetValue, &AcpiGbl_FADT->ResetRegister); 1662 if (ACPI_FAILURE(status)) { 1663 printf("ACPI reset failed - %s\n", AcpiFormatException(status)); 1664 } else { 1665 DELAY(1000000); 1666 printf("ACPI reset failed - timeout\n"); 1667 } 1668 } else if (panicstr == NULL) { 1669 printf("Shutting down ACPI\n"); 1670 AcpiTerminate(); 1671 } 1672 } 1673 1674 static void 1675 acpi_enable_fixed_events(struct acpi_softc *sc) 1676 { 1677 static int first_time = 1; 1678 1679 /* Enable and clear fixed events and install handlers. */ 1680 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 1681 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1682 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1683 acpi_event_power_button_sleep, sc); 1684 if (first_time) 1685 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1686 } 1687 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 1688 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1689 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1690 acpi_event_sleep_button_sleep, sc); 1691 if (first_time) 1692 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1693 } 1694 1695 first_time = 0; 1696 } 1697 1698 /* 1699 * Returns true if the device is actually present and should 1700 * be attached to. This requires the present, enabled, UI-visible 1701 * and diagnostics-passed bits to be set. 1702 */ 1703 BOOLEAN 1704 acpi_DeviceIsPresent(device_t dev) 1705 { 1706 ACPI_DEVICE_INFO *devinfo; 1707 ACPI_HANDLE h; 1708 ACPI_BUFFER buf; 1709 ACPI_STATUS error; 1710 int ret; 1711 1712 ret = FALSE; 1713 if ((h = acpi_get_handle(dev)) == NULL) 1714 return (FALSE); 1715 buf.Pointer = NULL; 1716 buf.Length = ACPI_ALLOCATE_BUFFER; 1717 error = AcpiGetObjectInfo(h, &buf); 1718 if (ACPI_FAILURE(error)) 1719 return (FALSE); 1720 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1721 1722 /* If no _STA method, must be present */ 1723 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1724 ret = TRUE; 1725 1726 /* Return true for 'present' and 'functioning' */ 1727 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1728 ret = TRUE; 1729 1730 AcpiOsFree(buf.Pointer); 1731 return (ret); 1732 } 1733 1734 /* 1735 * Returns true if the battery is actually present and inserted. 1736 */ 1737 BOOLEAN 1738 acpi_BatteryIsPresent(device_t dev) 1739 { 1740 ACPI_DEVICE_INFO *devinfo; 1741 ACPI_HANDLE h; 1742 ACPI_BUFFER buf; 1743 ACPI_STATUS error; 1744 int ret; 1745 1746 ret = FALSE; 1747 if ((h = acpi_get_handle(dev)) == NULL) 1748 return (FALSE); 1749 buf.Pointer = NULL; 1750 buf.Length = ACPI_ALLOCATE_BUFFER; 1751 error = AcpiGetObjectInfo(h, &buf); 1752 if (ACPI_FAILURE(error)) 1753 return (FALSE); 1754 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1755 1756 /* If no _STA method, must be present */ 1757 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1758 ret = TRUE; 1759 1760 /* Return true for 'present', 'battery present', and 'functioning' */ 1761 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1762 ret = TRUE; 1763 1764 AcpiOsFree(buf.Pointer); 1765 return (ret); 1766 } 1767 1768 /* 1769 * Match a HID string against a handle 1770 */ 1771 static BOOLEAN 1772 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1773 { 1774 ACPI_DEVICE_INFO *devinfo; 1775 ACPI_BUFFER buf; 1776 ACPI_STATUS error; 1777 int ret, i; 1778 1779 ret = FALSE; 1780 if (hid == NULL || h == NULL) 1781 return (ret); 1782 buf.Pointer = NULL; 1783 buf.Length = ACPI_ALLOCATE_BUFFER; 1784 error = AcpiGetObjectInfo(h, &buf); 1785 if (ACPI_FAILURE(error)) 1786 return (ret); 1787 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1788 1789 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1790 strcmp(hid, devinfo->HardwareId.Value) == 0) 1791 ret = TRUE; 1792 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1793 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1794 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1795 ret = TRUE; 1796 break; 1797 } 1798 } 1799 } 1800 1801 AcpiOsFree(buf.Pointer); 1802 return (ret); 1803 } 1804 1805 /* 1806 * Return the handle of a named object within our scope, ie. that of (parent) 1807 * or one if its parents. 1808 */ 1809 ACPI_STATUS 1810 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1811 { 1812 ACPI_HANDLE r; 1813 ACPI_STATUS status; 1814 1815 /* Walk back up the tree to the root */ 1816 for (;;) { 1817 status = AcpiGetHandle(parent, path, &r); 1818 if (ACPI_SUCCESS(status)) { 1819 *result = r; 1820 return (AE_OK); 1821 } 1822 /* XXX Return error here? */ 1823 if (status != AE_NOT_FOUND) 1824 return (AE_OK); 1825 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1826 return (AE_NOT_FOUND); 1827 parent = r; 1828 } 1829 } 1830 1831 /* Find the difference between two PM tick counts. */ 1832 uint32_t 1833 acpi_TimerDelta(uint32_t end, uint32_t start) 1834 { 1835 uint32_t delta; 1836 1837 if (end >= start) 1838 delta = end - start; 1839 else if (AcpiGbl_FADT->TmrValExt == 0) 1840 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 1841 else 1842 delta = ((0xFFFFFFFF - start) + end + 1); 1843 return (delta); 1844 } 1845 1846 /* 1847 * Allocate a buffer with a preset data size. 1848 */ 1849 ACPI_BUFFER * 1850 acpi_AllocBuffer(int size) 1851 { 1852 ACPI_BUFFER *buf; 1853 1854 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1855 return (NULL); 1856 buf->Length = size; 1857 buf->Pointer = (void *)(buf + 1); 1858 return (buf); 1859 } 1860 1861 ACPI_STATUS 1862 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1863 { 1864 ACPI_OBJECT arg1; 1865 ACPI_OBJECT_LIST args; 1866 1867 arg1.Type = ACPI_TYPE_INTEGER; 1868 arg1.Integer.Value = number; 1869 args.Count = 1; 1870 args.Pointer = &arg1; 1871 1872 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1873 } 1874 1875 /* 1876 * Evaluate a path that should return an integer. 1877 */ 1878 ACPI_STATUS 1879 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1880 { 1881 ACPI_STATUS status; 1882 ACPI_BUFFER buf; 1883 ACPI_OBJECT param; 1884 1885 if (handle == NULL) 1886 handle = ACPI_ROOT_OBJECT; 1887 1888 /* 1889 * Assume that what we've been pointed at is an Integer object, or 1890 * a method that will return an Integer. 1891 */ 1892 buf.Pointer = ¶m; 1893 buf.Length = sizeof(param); 1894 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1895 if (ACPI_SUCCESS(status)) { 1896 if (param.Type == ACPI_TYPE_INTEGER) 1897 *number = param.Integer.Value; 1898 else 1899 status = AE_TYPE; 1900 } 1901 1902 /* 1903 * In some applications, a method that's expected to return an Integer 1904 * may instead return a Buffer (probably to simplify some internal 1905 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1906 * convert it into an Integer as best we can. 1907 * 1908 * This is a hack. 1909 */ 1910 if (status == AE_BUFFER_OVERFLOW) { 1911 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1912 status = AE_NO_MEMORY; 1913 } else { 1914 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1915 if (ACPI_SUCCESS(status)) 1916 status = acpi_ConvertBufferToInteger(&buf, number); 1917 AcpiOsFree(buf.Pointer); 1918 } 1919 } 1920 return (status); 1921 } 1922 1923 ACPI_STATUS 1924 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1925 { 1926 ACPI_OBJECT *p; 1927 UINT8 *val; 1928 int i; 1929 1930 p = (ACPI_OBJECT *)bufp->Pointer; 1931 if (p->Type == ACPI_TYPE_INTEGER) { 1932 *number = p->Integer.Value; 1933 return (AE_OK); 1934 } 1935 if (p->Type != ACPI_TYPE_BUFFER) 1936 return (AE_TYPE); 1937 if (p->Buffer.Length > sizeof(int)) 1938 return (AE_BAD_DATA); 1939 1940 *number = 0; 1941 val = p->Buffer.Pointer; 1942 for (i = 0; i < p->Buffer.Length; i++) 1943 *number += val[i] << (i * 8); 1944 return (AE_OK); 1945 } 1946 1947 /* 1948 * Iterate over the elements of an a package object, calling the supplied 1949 * function for each element. 1950 * 1951 * XXX possible enhancement might be to abort traversal on error. 1952 */ 1953 ACPI_STATUS 1954 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1955 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1956 { 1957 ACPI_OBJECT *comp; 1958 int i; 1959 1960 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1961 return (AE_BAD_PARAMETER); 1962 1963 /* Iterate over components */ 1964 i = 0; 1965 comp = pkg->Package.Elements; 1966 for (; i < pkg->Package.Count; i++, comp++) 1967 func(comp, arg); 1968 1969 return (AE_OK); 1970 } 1971 1972 /* 1973 * Find the (index)th resource object in a set. 1974 */ 1975 ACPI_STATUS 1976 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1977 { 1978 ACPI_RESOURCE *rp; 1979 int i; 1980 1981 rp = (ACPI_RESOURCE *)buf->Pointer; 1982 i = index; 1983 while (i-- > 0) { 1984 /* Range check */ 1985 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1986 return (AE_BAD_PARAMETER); 1987 1988 /* Check for terminator */ 1989 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 1990 return (AE_NOT_FOUND); 1991 rp = ACPI_NEXT_RESOURCE(rp); 1992 } 1993 if (resp != NULL) 1994 *resp = rp; 1995 1996 return (AE_OK); 1997 } 1998 1999 /* 2000 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2001 * 2002 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2003 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2004 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2005 * resources. 2006 */ 2007 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2008 2009 ACPI_STATUS 2010 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2011 { 2012 ACPI_RESOURCE *rp; 2013 void *newp; 2014 2015 /* Initialise the buffer if necessary. */ 2016 if (buf->Pointer == NULL) { 2017 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2018 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2019 return (AE_NO_MEMORY); 2020 rp = (ACPI_RESOURCE *)buf->Pointer; 2021 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2022 rp->Length = 0; 2023 } 2024 if (res == NULL) 2025 return (AE_OK); 2026 2027 /* 2028 * Scan the current buffer looking for the terminator. 2029 * This will either find the terminator or hit the end 2030 * of the buffer and return an error. 2031 */ 2032 rp = (ACPI_RESOURCE *)buf->Pointer; 2033 for (;;) { 2034 /* Range check, don't go outside the buffer */ 2035 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2036 return (AE_BAD_PARAMETER); 2037 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2038 break; 2039 rp = ACPI_NEXT_RESOURCE(rp); 2040 } 2041 2042 /* 2043 * Check the size of the buffer and expand if required. 2044 * 2045 * Required size is: 2046 * size of existing resources before terminator + 2047 * size of new resource and header + 2048 * size of terminator. 2049 * 2050 * Note that this loop should really only run once, unless 2051 * for some reason we are stuffing a *really* huge resource. 2052 */ 2053 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2054 res->Length + ACPI_RS_SIZE_NO_DATA + 2055 ACPI_RS_SIZE_MIN) >= buf->Length) { 2056 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2057 return (AE_NO_MEMORY); 2058 bcopy(buf->Pointer, newp, buf->Length); 2059 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2060 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2061 AcpiOsFree(buf->Pointer); 2062 buf->Pointer = newp; 2063 buf->Length += buf->Length; 2064 } 2065 2066 /* Insert the new resource. */ 2067 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2068 2069 /* And add the terminator. */ 2070 rp = ACPI_NEXT_RESOURCE(rp); 2071 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2072 rp->Length = 0; 2073 2074 return (AE_OK); 2075 } 2076 2077 /* 2078 * Set interrupt model. 2079 */ 2080 ACPI_STATUS 2081 acpi_SetIntrModel(int model) 2082 { 2083 2084 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2085 } 2086 2087 static void 2088 acpi_sleep_enable(void *arg) 2089 { 2090 2091 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2092 } 2093 2094 enum acpi_sleep_state { 2095 ACPI_SS_NONE, 2096 ACPI_SS_GPE_SET, 2097 ACPI_SS_DEV_SUSPEND, 2098 ACPI_SS_SLP_PREP, 2099 ACPI_SS_SLEPT, 2100 }; 2101 2102 /* 2103 * Set the system sleep state 2104 * 2105 * Currently we support S1-S5 but S4 is only S4BIOS 2106 */ 2107 ACPI_STATUS 2108 acpi_SetSleepState(struct acpi_softc *sc, int state) 2109 { 2110 ACPI_STATUS status; 2111 UINT8 TypeA; 2112 UINT8 TypeB; 2113 enum acpi_sleep_state slp_state; 2114 2115 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2116 2117 status = AE_OK; 2118 ACPI_LOCK(acpi); 2119 if (sc->acpi_sleep_disabled) { 2120 if (sc->acpi_sstate != ACPI_STATE_S0) 2121 status = AE_ERROR; 2122 ACPI_UNLOCK(acpi); 2123 printf("acpi: suspend request ignored (not ready yet)\n"); 2124 return (status); 2125 } 2126 sc->acpi_sleep_disabled = 1; 2127 ACPI_UNLOCK(acpi); 2128 2129 /* 2130 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2131 * drivers need this. 2132 */ 2133 mtx_lock(&Giant); 2134 slp_state = ACPI_SS_NONE; 2135 switch (state) { 2136 case ACPI_STATE_S1: 2137 case ACPI_STATE_S2: 2138 case ACPI_STATE_S3: 2139 case ACPI_STATE_S4: 2140 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2141 if (status == AE_NOT_FOUND) { 2142 device_printf(sc->acpi_dev, 2143 "Sleep state S%d not supported by BIOS\n", state); 2144 break; 2145 } else if (ACPI_FAILURE(status)) { 2146 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2147 AcpiFormatException(status)); 2148 break; 2149 } 2150 2151 sc->acpi_sstate = state; 2152 2153 /* Enable any GPEs as appropriate and requested by the user. */ 2154 acpi_wake_prep_walk(state); 2155 slp_state = ACPI_SS_GPE_SET; 2156 2157 /* 2158 * Inform all devices that we are going to sleep. If at least one 2159 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2160 * 2161 * XXX Note that a better two-pass approach with a 'veto' pass 2162 * followed by a "real thing" pass would be better, but the current 2163 * bus interface does not provide for this. 2164 */ 2165 if (DEVICE_SUSPEND(root_bus) != 0) { 2166 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2167 break; 2168 } 2169 slp_state = ACPI_SS_DEV_SUSPEND; 2170 2171 status = AcpiEnterSleepStatePrep(state); 2172 if (ACPI_FAILURE(status)) { 2173 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2174 AcpiFormatException(status)); 2175 break; 2176 } 2177 slp_state = ACPI_SS_SLP_PREP; 2178 2179 if (sc->acpi_sleep_delay > 0) 2180 DELAY(sc->acpi_sleep_delay * 1000000); 2181 2182 if (state != ACPI_STATE_S1) { 2183 acpi_sleep_machdep(sc, state); 2184 2185 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2186 if (state == ACPI_STATE_S4) 2187 AcpiEnable(); 2188 } else { 2189 ACPI_DISABLE_IRQS(); 2190 status = AcpiEnterSleepState(state); 2191 if (ACPI_FAILURE(status)) { 2192 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2193 AcpiFormatException(status)); 2194 break; 2195 } 2196 } 2197 slp_state = ACPI_SS_SLEPT; 2198 break; 2199 case ACPI_STATE_S5: 2200 /* 2201 * Shut down cleanly and power off. This will call us back through the 2202 * shutdown handlers. 2203 */ 2204 shutdown_nice(RB_POWEROFF); 2205 break; 2206 case ACPI_STATE_S0: 2207 default: 2208 status = AE_BAD_PARAMETER; 2209 break; 2210 } 2211 2212 /* 2213 * Back out state according to how far along we got in the suspend 2214 * process. This handles both the error and success cases. 2215 */ 2216 if (slp_state >= ACPI_SS_GPE_SET) { 2217 acpi_wake_prep_walk(state); 2218 sc->acpi_sstate = ACPI_STATE_S0; 2219 } 2220 if (slp_state >= ACPI_SS_SLP_PREP) 2221 AcpiLeaveSleepState(state); 2222 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2223 DEVICE_RESUME(root_bus); 2224 if (slp_state >= ACPI_SS_SLEPT) 2225 acpi_enable_fixed_events(sc); 2226 2227 /* Allow another sleep request after a while. */ 2228 if (state != ACPI_STATE_S5) 2229 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 2230 2231 mtx_unlock(&Giant); 2232 return_ACPI_STATUS (status); 2233 } 2234 2235 /* Initialize a device's wake GPE. */ 2236 int 2237 acpi_wake_init(device_t dev, int type) 2238 { 2239 struct acpi_prw_data prw; 2240 2241 /* Evaluate _PRW to find the GPE. */ 2242 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2243 return (ENXIO); 2244 2245 /* Set the requested type for the GPE (runtime, wake, or both). */ 2246 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 2247 device_printf(dev, "set GPE type failed\n"); 2248 return (ENXIO); 2249 } 2250 2251 return (0); 2252 } 2253 2254 /* Enable or disable the device's wake GPE. */ 2255 int 2256 acpi_wake_set_enable(device_t dev, int enable) 2257 { 2258 struct acpi_prw_data prw; 2259 ACPI_HANDLE handle; 2260 ACPI_STATUS status; 2261 int flags; 2262 2263 /* Make sure the device supports waking the system and get the GPE. */ 2264 handle = acpi_get_handle(dev); 2265 if (acpi_parse_prw(handle, &prw) != 0) 2266 return (ENXIO); 2267 2268 flags = acpi_get_flags(dev); 2269 if (enable) { 2270 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2271 if (ACPI_FAILURE(status)) { 2272 device_printf(dev, "enable wake failed\n"); 2273 return (ENXIO); 2274 } 2275 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2276 } else { 2277 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2278 if (ACPI_FAILURE(status)) { 2279 device_printf(dev, "disable wake failed\n"); 2280 return (ENXIO); 2281 } 2282 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2283 } 2284 2285 return (0); 2286 } 2287 2288 static int 2289 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2290 { 2291 struct acpi_prw_data prw; 2292 device_t dev; 2293 2294 /* Check that this is a wake-capable device and get its GPE. */ 2295 if (acpi_parse_prw(handle, &prw) != 0) 2296 return (ENXIO); 2297 dev = acpi_get_device(handle); 2298 2299 /* 2300 * The destination sleep state must be less than (i.e., higher power) 2301 * or equal to the value specified by _PRW. If this GPE cannot be 2302 * enabled for the next sleep state, then disable it. If it can and 2303 * the user requested it be enabled, turn on any required power resources 2304 * and set _PSW. 2305 */ 2306 if (sstate > prw.lowest_wake) { 2307 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2308 if (bootverbose) 2309 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2310 acpi_name(handle), sstate); 2311 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2312 acpi_pwr_wake_enable(handle, 1); 2313 acpi_SetInteger(handle, "_PSW", 1); 2314 if (bootverbose) 2315 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2316 acpi_name(handle), sstate); 2317 } 2318 2319 return (0); 2320 } 2321 2322 static int 2323 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2324 { 2325 struct acpi_prw_data prw; 2326 device_t dev; 2327 2328 /* 2329 * Check that this is a wake-capable device and get its GPE. Return 2330 * now if the user didn't enable this device for wake. 2331 */ 2332 if (acpi_parse_prw(handle, &prw) != 0) 2333 return (ENXIO); 2334 dev = acpi_get_device(handle); 2335 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2336 return (0); 2337 2338 /* 2339 * If this GPE couldn't be enabled for the previous sleep state, it was 2340 * disabled before going to sleep so re-enable it. If it was enabled, 2341 * clear _PSW and turn off any power resources it used. 2342 */ 2343 if (sstate > prw.lowest_wake) { 2344 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2345 if (bootverbose) 2346 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2347 } else { 2348 acpi_SetInteger(handle, "_PSW", 0); 2349 acpi_pwr_wake_enable(handle, 0); 2350 if (bootverbose) 2351 device_printf(dev, "run_prep cleaned up for %s\n", 2352 acpi_name(handle)); 2353 } 2354 2355 return (0); 2356 } 2357 2358 static ACPI_STATUS 2359 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2360 { 2361 int sstate; 2362 2363 /* If suspending, run the sleep prep function, otherwise wake. */ 2364 sstate = *(int *)context; 2365 if (AcpiGbl_SystemAwakeAndRunning) 2366 acpi_wake_sleep_prep(handle, sstate); 2367 else 2368 acpi_wake_run_prep(handle, sstate); 2369 return (AE_OK); 2370 } 2371 2372 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2373 static int 2374 acpi_wake_prep_walk(int sstate) 2375 { 2376 ACPI_HANDLE sb_handle; 2377 2378 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2379 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2380 acpi_wake_prep, &sstate, NULL); 2381 return (0); 2382 } 2383 2384 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2385 static int 2386 acpi_wake_sysctl_walk(device_t dev) 2387 { 2388 int error, i, numdevs; 2389 device_t *devlist; 2390 device_t child; 2391 ACPI_STATUS status; 2392 2393 error = device_get_children(dev, &devlist, &numdevs); 2394 if (error != 0 || numdevs == 0) { 2395 if (numdevs == 0) 2396 free(devlist, M_TEMP); 2397 return (error); 2398 } 2399 for (i = 0; i < numdevs; i++) { 2400 child = devlist[i]; 2401 acpi_wake_sysctl_walk(child); 2402 if (!device_is_attached(child)) 2403 continue; 2404 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2405 if (ACPI_SUCCESS(status)) { 2406 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2407 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2408 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2409 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2410 } 2411 } 2412 free(devlist, M_TEMP); 2413 2414 return (0); 2415 } 2416 2417 /* Enable or disable wake from userland. */ 2418 static int 2419 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2420 { 2421 int enable, error; 2422 device_t dev; 2423 2424 dev = (device_t)arg1; 2425 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2426 2427 error = sysctl_handle_int(oidp, &enable, 0, req); 2428 if (error != 0 || req->newptr == NULL) 2429 return (error); 2430 if (enable != 0 && enable != 1) 2431 return (EINVAL); 2432 2433 return (acpi_wake_set_enable(dev, enable)); 2434 } 2435 2436 /* Parse a device's _PRW into a structure. */ 2437 int 2438 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2439 { 2440 ACPI_STATUS status; 2441 ACPI_BUFFER prw_buffer; 2442 ACPI_OBJECT *res, *res2; 2443 int error, i, power_count; 2444 2445 if (h == NULL || prw == NULL) 2446 return (EINVAL); 2447 2448 /* 2449 * The _PRW object (7.2.9) is only required for devices that have the 2450 * ability to wake the system from a sleeping state. 2451 */ 2452 error = EINVAL; 2453 prw_buffer.Pointer = NULL; 2454 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2455 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2456 if (ACPI_FAILURE(status)) 2457 return (ENOENT); 2458 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2459 if (res == NULL) 2460 return (ENOENT); 2461 if (!ACPI_PKG_VALID(res, 2)) 2462 goto out; 2463 2464 /* 2465 * Element 1 of the _PRW object: 2466 * The lowest power system sleeping state that can be entered while still 2467 * providing wake functionality. The sleeping state being entered must 2468 * be less than (i.e., higher power) or equal to this value. 2469 */ 2470 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2471 goto out; 2472 2473 /* 2474 * Element 0 of the _PRW object: 2475 */ 2476 switch (res->Package.Elements[0].Type) { 2477 case ACPI_TYPE_INTEGER: 2478 /* 2479 * If the data type of this package element is numeric, then this 2480 * _PRW package element is the bit index in the GPEx_EN, in the 2481 * GPE blocks described in the FADT, of the enable bit that is 2482 * enabled for the wake event. 2483 */ 2484 prw->gpe_handle = NULL; 2485 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2486 error = 0; 2487 break; 2488 case ACPI_TYPE_PACKAGE: 2489 /* 2490 * If the data type of this package element is a package, then this 2491 * _PRW package element is itself a package containing two 2492 * elements. The first is an object reference to the GPE Block 2493 * device that contains the GPE that will be triggered by the wake 2494 * event. The second element is numeric and it contains the bit 2495 * index in the GPEx_EN, in the GPE Block referenced by the 2496 * first element in the package, of the enable bit that is enabled for 2497 * the wake event. 2498 * 2499 * For example, if this field is a package then it is of the form: 2500 * Package() {\_SB.PCI0.ISA.GPE, 2} 2501 */ 2502 res2 = &res->Package.Elements[0]; 2503 if (!ACPI_PKG_VALID(res2, 2)) 2504 goto out; 2505 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2506 if (prw->gpe_handle == NULL) 2507 goto out; 2508 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2509 goto out; 2510 error = 0; 2511 break; 2512 default: 2513 goto out; 2514 } 2515 2516 /* Elements 2 to N of the _PRW object are power resources. */ 2517 power_count = res->Package.Count - 2; 2518 if (power_count > ACPI_PRW_MAX_POWERRES) { 2519 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2520 power_count = 0; 2521 } 2522 prw->power_res_count = power_count; 2523 for (i = 0; i < power_count; i++) 2524 prw->power_res[i] = res->Package.Elements[i]; 2525 2526 out: 2527 if (prw_buffer.Pointer != NULL) 2528 AcpiOsFree(prw_buffer.Pointer); 2529 return (error); 2530 } 2531 2532 /* 2533 * ACPI Event Handlers 2534 */ 2535 2536 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2537 2538 static void 2539 acpi_system_eventhandler_sleep(void *arg, int state) 2540 { 2541 2542 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2543 2544 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2545 acpi_SetSleepState((struct acpi_softc *)arg, state); 2546 2547 return_VOID; 2548 } 2549 2550 static void 2551 acpi_system_eventhandler_wakeup(void *arg, int state) 2552 { 2553 2554 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2555 2556 /* Currently, nothing to do for wakeup. */ 2557 2558 return_VOID; 2559 } 2560 2561 /* 2562 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2563 */ 2564 UINT32 2565 acpi_event_power_button_sleep(void *context) 2566 { 2567 struct acpi_softc *sc = (struct acpi_softc *)context; 2568 2569 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2570 2571 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2572 2573 return_VALUE (ACPI_INTERRUPT_HANDLED); 2574 } 2575 2576 UINT32 2577 acpi_event_power_button_wake(void *context) 2578 { 2579 struct acpi_softc *sc = (struct acpi_softc *)context; 2580 2581 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2582 2583 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2584 2585 return_VALUE (ACPI_INTERRUPT_HANDLED); 2586 } 2587 2588 UINT32 2589 acpi_event_sleep_button_sleep(void *context) 2590 { 2591 struct acpi_softc *sc = (struct acpi_softc *)context; 2592 2593 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2594 2595 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2596 2597 return_VALUE (ACPI_INTERRUPT_HANDLED); 2598 } 2599 2600 UINT32 2601 acpi_event_sleep_button_wake(void *context) 2602 { 2603 struct acpi_softc *sc = (struct acpi_softc *)context; 2604 2605 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2606 2607 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2608 2609 return_VALUE (ACPI_INTERRUPT_HANDLED); 2610 } 2611 2612 /* 2613 * XXX This static buffer is suboptimal. There is no locking so only 2614 * use this for single-threaded callers. 2615 */ 2616 char * 2617 acpi_name(ACPI_HANDLE handle) 2618 { 2619 ACPI_BUFFER buf; 2620 static char data[256]; 2621 2622 buf.Length = sizeof(data); 2623 buf.Pointer = data; 2624 2625 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2626 return (data); 2627 return ("(unknown)"); 2628 } 2629 2630 /* 2631 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2632 * parts of the namespace. 2633 */ 2634 int 2635 acpi_avoid(ACPI_HANDLE handle) 2636 { 2637 char *cp, *env, *np; 2638 int len; 2639 2640 np = acpi_name(handle); 2641 if (*np == '\\') 2642 np++; 2643 if ((env = getenv("debug.acpi.avoid")) == NULL) 2644 return (0); 2645 2646 /* Scan the avoid list checking for a match */ 2647 cp = env; 2648 for (;;) { 2649 while (*cp != 0 && isspace(*cp)) 2650 cp++; 2651 if (*cp == 0) 2652 break; 2653 len = 0; 2654 while (cp[len] != 0 && !isspace(cp[len])) 2655 len++; 2656 if (!strncmp(cp, np, len)) { 2657 freeenv(env); 2658 return(1); 2659 } 2660 cp += len; 2661 } 2662 freeenv(env); 2663 2664 return (0); 2665 } 2666 2667 /* 2668 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2669 */ 2670 int 2671 acpi_disabled(char *subsys) 2672 { 2673 char *cp, *env; 2674 int len; 2675 2676 if ((env = getenv("debug.acpi.disabled")) == NULL) 2677 return (0); 2678 if (strcmp(env, "all") == 0) { 2679 freeenv(env); 2680 return (1); 2681 } 2682 2683 /* Scan the disable list, checking for a match. */ 2684 cp = env; 2685 for (;;) { 2686 while (*cp != '\0' && isspace(*cp)) 2687 cp++; 2688 if (*cp == '\0') 2689 break; 2690 len = 0; 2691 while (cp[len] != '\0' && !isspace(cp[len])) 2692 len++; 2693 if (strncmp(cp, subsys, len) == 0) { 2694 freeenv(env); 2695 return (1); 2696 } 2697 cp += len; 2698 } 2699 freeenv(env); 2700 2701 return (0); 2702 } 2703 2704 /* 2705 * Control interface. 2706 * 2707 * We multiplex ioctls for all participating ACPI devices here. Individual 2708 * drivers wanting to be accessible via /dev/acpi should use the 2709 * register/deregister interface to make their handlers visible. 2710 */ 2711 struct acpi_ioctl_hook 2712 { 2713 TAILQ_ENTRY(acpi_ioctl_hook) link; 2714 u_long cmd; 2715 acpi_ioctl_fn fn; 2716 void *arg; 2717 }; 2718 2719 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2720 static int acpi_ioctl_hooks_initted; 2721 2722 int 2723 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2724 { 2725 struct acpi_ioctl_hook *hp; 2726 2727 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2728 return (ENOMEM); 2729 hp->cmd = cmd; 2730 hp->fn = fn; 2731 hp->arg = arg; 2732 2733 ACPI_LOCK(acpi); 2734 if (acpi_ioctl_hooks_initted == 0) { 2735 TAILQ_INIT(&acpi_ioctl_hooks); 2736 acpi_ioctl_hooks_initted = 1; 2737 } 2738 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2739 ACPI_UNLOCK(acpi); 2740 2741 return (0); 2742 } 2743 2744 void 2745 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2746 { 2747 struct acpi_ioctl_hook *hp; 2748 2749 ACPI_LOCK(acpi); 2750 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2751 if (hp->cmd == cmd && hp->fn == fn) 2752 break; 2753 2754 if (hp != NULL) { 2755 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2756 free(hp, M_ACPIDEV); 2757 } 2758 ACPI_UNLOCK(acpi); 2759 } 2760 2761 static int 2762 acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2763 { 2764 return (0); 2765 } 2766 2767 static int 2768 acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2769 { 2770 return (0); 2771 } 2772 2773 static int 2774 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2775 { 2776 struct acpi_softc *sc; 2777 struct acpi_ioctl_hook *hp; 2778 int error, state; 2779 2780 error = 0; 2781 hp = NULL; 2782 sc = dev->si_drv1; 2783 2784 /* 2785 * Scan the list of registered ioctls, looking for handlers. 2786 */ 2787 ACPI_LOCK(acpi); 2788 if (acpi_ioctl_hooks_initted) 2789 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2790 if (hp->cmd == cmd) 2791 break; 2792 } 2793 ACPI_UNLOCK(acpi); 2794 if (hp) 2795 return (hp->fn(cmd, addr, hp->arg)); 2796 2797 /* 2798 * Core ioctls are not permitted for non-writable user. 2799 * Currently, other ioctls just fetch information. 2800 * Not changing system behavior. 2801 */ 2802 if ((flag & FWRITE) == 0) 2803 return (EPERM); 2804 2805 /* Core system ioctls. */ 2806 switch (cmd) { 2807 case ACPIIO_SETSLPSTATE: 2808 error = EINVAL; 2809 state = *(int *)addr; 2810 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2811 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 2812 error = 0; 2813 break; 2814 default: 2815 error = ENXIO; 2816 break; 2817 } 2818 2819 return (error); 2820 } 2821 2822 static int 2823 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2824 { 2825 int error; 2826 struct sbuf sb; 2827 UINT8 state, TypeA, TypeB; 2828 2829 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 2830 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 2831 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 2832 sbuf_printf(&sb, "S%d ", state); 2833 sbuf_trim(&sb); 2834 sbuf_finish(&sb); 2835 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 2836 sbuf_delete(&sb); 2837 return (error); 2838 } 2839 2840 static int 2841 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2842 { 2843 char sleep_state[10]; 2844 int error; 2845 u_int new_state, old_state; 2846 2847 old_state = *(u_int *)oidp->oid_arg1; 2848 if (old_state > ACPI_S_STATES_MAX + 1) 2849 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 2850 else 2851 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 2852 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2853 if (error == 0 && req->newptr != NULL) { 2854 new_state = ACPI_STATE_S0; 2855 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 2856 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 2857 break; 2858 if (new_state <= ACPI_S_STATES_MAX + 1) { 2859 if (new_state != old_state) 2860 *(u_int *)oidp->oid_arg1 = new_state; 2861 } else 2862 error = EINVAL; 2863 } 2864 2865 return (error); 2866 } 2867 2868 /* Inform devctl(4) when we receive a Notify. */ 2869 void 2870 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 2871 { 2872 char notify_buf[16]; 2873 ACPI_BUFFER handle_buf; 2874 ACPI_STATUS status; 2875 2876 if (subsystem == NULL) 2877 return; 2878 2879 handle_buf.Pointer = NULL; 2880 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 2881 status = AcpiNsHandleToPathname(h, &handle_buf); 2882 if (ACPI_FAILURE(status)) 2883 return; 2884 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 2885 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 2886 AcpiOsFree(handle_buf.Pointer); 2887 } 2888 2889 #ifdef ACPI_DEBUG 2890 /* 2891 * Support for parsing debug options from the kernel environment. 2892 * 2893 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2894 * by specifying the names of the bits in the debug.acpi.layer and 2895 * debug.acpi.level environment variables. Bits may be unset by 2896 * prefixing the bit name with !. 2897 */ 2898 struct debugtag 2899 { 2900 char *name; 2901 UINT32 value; 2902 }; 2903 2904 static struct debugtag dbg_layer[] = { 2905 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2906 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2907 {"ACPI_EVENTS", ACPI_EVENTS}, 2908 {"ACPI_TABLES", ACPI_TABLES}, 2909 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2910 {"ACPI_PARSER", ACPI_PARSER}, 2911 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2912 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2913 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2914 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2915 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2916 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2917 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2918 2919 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2920 {"ACPI_BATTERY", ACPI_BATTERY}, 2921 {"ACPI_BUS", ACPI_BUS}, 2922 {"ACPI_BUTTON", ACPI_BUTTON}, 2923 {"ACPI_EC", ACPI_EC}, 2924 {"ACPI_FAN", ACPI_FAN}, 2925 {"ACPI_POWERRES", ACPI_POWERRES}, 2926 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2927 {"ACPI_THERMAL", ACPI_THERMAL}, 2928 {"ACPI_TIMER", ACPI_TIMER}, 2929 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2930 {NULL, 0} 2931 }; 2932 2933 static struct debugtag dbg_level[] = { 2934 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2935 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2936 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2937 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2938 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2939 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2940 2941 /* Trace verbosity level 1 [Standard Trace Level] */ 2942 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2943 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2944 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2945 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2946 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2947 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2948 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2949 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2950 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2951 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2952 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2953 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2954 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2955 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2956 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2957 2958 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2959 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2960 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2961 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2962 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2963 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2964 2965 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2966 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2967 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2968 {"ACPI_LV_IO", ACPI_LV_IO}, 2969 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2970 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2971 2972 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2973 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2974 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2975 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2976 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2977 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2978 {NULL, 0} 2979 }; 2980 2981 static void 2982 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2983 { 2984 char *ep; 2985 int i, l; 2986 int set; 2987 2988 while (*cp) { 2989 if (isspace(*cp)) { 2990 cp++; 2991 continue; 2992 } 2993 ep = cp; 2994 while (*ep && !isspace(*ep)) 2995 ep++; 2996 if (*cp == '!') { 2997 set = 0; 2998 cp++; 2999 if (cp == ep) 3000 continue; 3001 } else { 3002 set = 1; 3003 } 3004 l = ep - cp; 3005 for (i = 0; tag[i].name != NULL; i++) { 3006 if (!strncmp(cp, tag[i].name, l)) { 3007 if (set) 3008 *flag |= tag[i].value; 3009 else 3010 *flag &= ~tag[i].value; 3011 } 3012 } 3013 cp = ep; 3014 } 3015 } 3016 3017 static void 3018 acpi_set_debugging(void *junk) 3019 { 3020 char *layer, *level; 3021 3022 if (cold) { 3023 AcpiDbgLayer = 0; 3024 AcpiDbgLevel = 0; 3025 } 3026 3027 layer = getenv("debug.acpi.layer"); 3028 level = getenv("debug.acpi.level"); 3029 if (layer == NULL && level == NULL) 3030 return; 3031 3032 printf("ACPI set debug"); 3033 if (layer != NULL) { 3034 if (strcmp("NONE", layer) != 0) 3035 printf(" layer '%s'", layer); 3036 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3037 freeenv(layer); 3038 } 3039 if (level != NULL) { 3040 if (strcmp("NONE", level) != 0) 3041 printf(" level '%s'", level); 3042 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3043 freeenv(level); 3044 } 3045 printf("\n"); 3046 } 3047 3048 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3049 NULL); 3050 3051 static int 3052 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3053 { 3054 int error, *dbg; 3055 struct debugtag *tag; 3056 struct sbuf sb; 3057 3058 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3059 return (ENOMEM); 3060 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3061 tag = &dbg_layer[0]; 3062 dbg = &AcpiDbgLayer; 3063 } else { 3064 tag = &dbg_level[0]; 3065 dbg = &AcpiDbgLevel; 3066 } 3067 3068 /* Get old values if this is a get request. */ 3069 ACPI_SERIAL_BEGIN(acpi); 3070 if (*dbg == 0) { 3071 sbuf_cpy(&sb, "NONE"); 3072 } else if (req->newptr == NULL) { 3073 for (; tag->name != NULL; tag++) { 3074 if ((*dbg & tag->value) == tag->value) 3075 sbuf_printf(&sb, "%s ", tag->name); 3076 } 3077 } 3078 sbuf_trim(&sb); 3079 sbuf_finish(&sb); 3080 3081 /* Copy out the old values to the user. */ 3082 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3083 sbuf_delete(&sb); 3084 3085 /* If the user is setting a string, parse it. */ 3086 if (error == 0 && req->newptr != NULL) { 3087 *dbg = 0; 3088 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3089 acpi_set_debugging(NULL); 3090 } 3091 ACPI_SERIAL_END(acpi); 3092 3093 return (error); 3094 } 3095 3096 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3097 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3098 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3099 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3100 #endif /* ACPI_DEBUG */ 3101 3102 static int 3103 acpi_pm_func(u_long cmd, void *arg, ...) 3104 { 3105 int state, acpi_state; 3106 int error; 3107 struct acpi_softc *sc; 3108 va_list ap; 3109 3110 error = 0; 3111 switch (cmd) { 3112 case POWER_CMD_SUSPEND: 3113 sc = (struct acpi_softc *)arg; 3114 if (sc == NULL) { 3115 error = EINVAL; 3116 goto out; 3117 } 3118 3119 va_start(ap, arg); 3120 state = va_arg(ap, int); 3121 va_end(ap); 3122 3123 switch (state) { 3124 case POWER_SLEEP_STATE_STANDBY: 3125 acpi_state = sc->acpi_standby_sx; 3126 break; 3127 case POWER_SLEEP_STATE_SUSPEND: 3128 acpi_state = sc->acpi_suspend_sx; 3129 break; 3130 case POWER_SLEEP_STATE_HIBERNATE: 3131 acpi_state = ACPI_STATE_S4; 3132 break; 3133 default: 3134 error = EINVAL; 3135 goto out; 3136 } 3137 3138 acpi_SetSleepState(sc, acpi_state); 3139 break; 3140 default: 3141 error = EINVAL; 3142 goto out; 3143 } 3144 3145 out: 3146 return (error); 3147 } 3148 3149 static void 3150 acpi_pm_register(void *arg) 3151 { 3152 if (!cold || resource_disabled("acpi", 0)) 3153 return; 3154 3155 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3156 } 3157 3158 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3159