acpi.c revision 133455
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 * $FreeBSD: head/sys/dev/acpica/acpi.c 133455 2004-08-10 22:02:52Z njl $ 30 */ 31 32#include "opt_acpi.h" 33#include <sys/param.h> 34#include <sys/kernel.h> 35#include <sys/proc.h> 36#include <sys/fcntl.h> 37#include <sys/malloc.h> 38#include <sys/module.h> 39#include <sys/bus.h> 40#include <sys/conf.h> 41#include <sys/ioccom.h> 42#include <sys/reboot.h> 43#include <sys/sysctl.h> 44#include <sys/ctype.h> 45#include <sys/linker.h> 46#include <sys/power.h> 47#include <sys/sbuf.h> 48#include <sys/smp.h> 49 50#include <machine/clock.h> 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 "acpi.h" 58#include <dev/acpica/acpivar.h> 59#include <dev/acpica/acpiio.h> 60#include <contrib/dev/acpica/acnamesp.h> 61 62MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 63 64/* Hooks for the ACPI CA debugging infrastructure */ 65#define _COMPONENT ACPI_BUS 66ACPI_MODULE_NAME("ACPI") 67 68static d_open_t acpiopen; 69static d_close_t acpiclose; 70static d_ioctl_t acpiioctl; 71 72static struct cdevsw acpi_cdevsw = { 73 .d_version = D_VERSION, 74 .d_flags = D_NEEDGIANT, 75 .d_open = acpiopen, 76 .d_close = acpiclose, 77 .d_ioctl = acpiioctl, 78 .d_name = "acpi", 79}; 80 81/* Global mutex for locking access to the ACPI subsystem. */ 82struct mtx acpi_mutex; 83 84/* Bitmap of device quirks. */ 85int acpi_quirks; 86 87/* Local pools for managing system resources for ACPI child devices. */ 88struct rman acpi_rman_io, acpi_rman_mem; 89 90static int acpi_modevent(struct module *mod, int event, void *junk); 91static void acpi_identify(driver_t *driver, device_t parent); 92static int acpi_probe(device_t dev); 93static int acpi_attach(device_t dev); 94static int acpi_shutdown(device_t dev); 95static device_t acpi_add_child(device_t bus, int order, const char *name, 96 int unit); 97static int acpi_print_child(device_t bus, device_t child); 98static int acpi_read_ivar(device_t dev, device_t child, int index, 99 uintptr_t *result); 100static int acpi_write_ivar(device_t dev, device_t child, int index, 101 uintptr_t value); 102static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 103static struct resource *acpi_alloc_resource(device_t bus, device_t child, 104 int type, int *rid, u_long start, u_long end, 105 u_long count, u_int flags); 106static int acpi_release_resource(device_t bus, device_t child, int type, 107 int rid, struct resource *r); 108static uint32_t acpi_isa_get_logicalid(device_t dev); 109static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 110static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 111static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 112 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 113 ACPI_BUFFER *ret); 114static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 115 void *context, void **retval); 116static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 117 int max_depth, acpi_scan_cb_t user_fn, void *arg); 118static int acpi_isa_pnp_probe(device_t bus, device_t child, 119 struct isa_pnp_id *ids); 120static void acpi_probe_children(device_t bus); 121static int acpi_probe_order(ACPI_HANDLE handle, int *order); 122static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 123 void *context, void **status); 124static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid); 125static void acpi_shutdown_final(void *arg, int howto); 126static void acpi_enable_fixed_events(struct acpi_softc *sc); 127static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 128static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 129static int acpi_wake_prep_walk(int sstate); 130static int acpi_wake_sysctl_walk(device_t dev); 131static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 132static void acpi_system_eventhandler_sleep(void *arg, int state); 133static void acpi_system_eventhandler_wakeup(void *arg, int state); 134static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 135static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 136static int acpi_pm_func(u_long cmd, void *arg, ...); 137static int acpi_child_location_str_method(device_t acdev, device_t child, 138 char *buf, size_t buflen); 139static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 140 char *buf, size_t buflen); 141 142static device_method_t acpi_methods[] = { 143 /* Device interface */ 144 DEVMETHOD(device_identify, acpi_identify), 145 DEVMETHOD(device_probe, acpi_probe), 146 DEVMETHOD(device_attach, acpi_attach), 147 DEVMETHOD(device_shutdown, acpi_shutdown), 148 DEVMETHOD(device_detach, bus_generic_detach), 149 DEVMETHOD(device_suspend, bus_generic_suspend), 150 DEVMETHOD(device_resume, bus_generic_resume), 151 152 /* Bus interface */ 153 DEVMETHOD(bus_add_child, acpi_add_child), 154 DEVMETHOD(bus_print_child, acpi_print_child), 155 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 156 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 157 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 158 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 159 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 160 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 161 DEVMETHOD(bus_release_resource, acpi_release_resource), 162 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 163 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 164 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 165 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 166 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 167 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 168 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 169 170 /* ACPI bus */ 171 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 172 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 173 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 174 175 /* ISA emulation */ 176 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 177 178 {0, 0} 179}; 180 181static driver_t acpi_driver = { 182 "acpi", 183 acpi_methods, 184 sizeof(struct acpi_softc), 185}; 186 187static devclass_t acpi_devclass; 188DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 189MODULE_VERSION(acpi, 1); 190 191#define ACPI_MINIMUM_AWAKETIME 5 192 193static const char* sleep_state_names[] = { 194 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 195 196SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, NULL, "ACPI debugging"); 197static char acpi_ca_version[12]; 198SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 199 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 200 201/* 202 * Allow override of whether methods execute in parallel or not. 203 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 204 * errors for AML that really can't handle parallel method execution. 205 * It is off by default since this breaks recursive methods and 206 * some IBMs use such code. 207 */ 208static int acpi_serialize_methods; 209TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 210 211/* 212 * ACPI can only be loaded as a module by the loader; activating it after 213 * system bootstrap time is not useful, and can be fatal to the system. 214 * It also cannot be unloaded, since the entire system bus heirarchy hangs 215 * off it. 216 */ 217static int 218acpi_modevent(struct module *mod, int event, void *junk) 219{ 220 switch (event) { 221 case MOD_LOAD: 222 if (!cold) { 223 printf("The ACPI driver cannot be loaded after boot.\n"); 224 return (EPERM); 225 } 226 break; 227 case MOD_UNLOAD: 228 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 229 return (EBUSY); 230 break; 231 default: 232 break; 233 } 234 return (0); 235} 236 237/* 238 * Perform early initialization. 239 */ 240ACPI_STATUS 241acpi_Startup(void) 242{ 243 static int started = 0; 244 int error, val; 245 246 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 247 248 /* Only run the startup code once. The MADT driver also calls this. */ 249 if (started) 250 return_VALUE (0); 251 started = 1; 252 253 /* Initialise the ACPI mutex */ 254 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 255 256 /* 257 * Set the globals from our tunables. This is needed because ACPI-CA 258 * uses UINT8 for some values and we have no tunable_byte. 259 */ 260 AcpiGbl_AllMethodsSerialized = (UINT8)acpi_serialize_methods; 261 262 /* Start up the ACPI CA subsystem. */ 263 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 264 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 265 return_VALUE (error); 266 } 267 268 if (ACPI_FAILURE(error = AcpiLoadTables())) { 269 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 270 AcpiTerminate(); 271 return_VALUE (error); 272 } 273 274 /* Set up any quirks we have for this system. */ 275 acpi_table_quirks(&acpi_quirks); 276 277 /* If the user manually set the disabled hint to 0, override any quirk. */ 278 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 279 acpi_quirks &= ~ACPI_Q_BROKEN; 280 if (acpi_quirks & ACPI_Q_BROKEN) { 281 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 282 AcpiTerminate(); 283 return_VALUE (AE_ERROR); 284 } 285 286 return_VALUE (AE_OK); 287} 288 289/* 290 * Detect ACPI, perform early initialisation 291 */ 292static void 293acpi_identify(driver_t *driver, device_t parent) 294{ 295 device_t child; 296 297 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 298 299 if (!cold) 300 return_VOID; 301 302 /* Check that we haven't been disabled with a hint. */ 303 if (resource_disabled("acpi", 0)) 304 return_VOID; 305 306 /* Make sure we're not being doubly invoked. */ 307 if (device_find_child(parent, "acpi", 0) != NULL) 308 return_VOID; 309 310 /* Initialize ACPI-CA. */ 311 if (ACPI_FAILURE(acpi_Startup())) 312 return_VOID; 313 314 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION); 315 316 /* Attach the actual ACPI device. */ 317 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 318 device_printf(parent, "device_identify failed\n"); 319 return_VOID; 320 } 321} 322 323/* 324 * Fetch some descriptive data from ACPI to put in our attach message. 325 */ 326static int 327acpi_probe(device_t dev) 328{ 329 ACPI_TABLE_HEADER th; 330 char buf[20]; 331 int error; 332 struct sbuf sb; 333 ACPI_STATUS status; 334 335 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 336 337 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 338 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 339 device_printf(dev, "probe failed, other PM system enabled.\n"); 340 return_VALUE (ENXIO); 341 } 342 343 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 344 device_printf(dev, "couldn't get XSDT header: %s\n", 345 AcpiFormatException(status)); 346 error = ENXIO; 347 } else { 348 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 349 sbuf_bcat(&sb, th.OemId, 6); 350 sbuf_trim(&sb); 351 sbuf_putc(&sb, ' '); 352 sbuf_bcat(&sb, th.OemTableId, 8); 353 sbuf_trim(&sb); 354 sbuf_finish(&sb); 355 device_set_desc_copy(dev, sbuf_data(&sb)); 356 sbuf_delete(&sb); 357 error = 0; 358 } 359 360 return_VALUE (error); 361} 362 363static int 364acpi_attach(device_t dev) 365{ 366 struct acpi_softc *sc; 367 ACPI_STATUS status; 368 int error, state; 369 UINT32 flags; 370 UINT8 TypeA, TypeB; 371 char *env; 372 373 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 374 375 sc = device_get_softc(dev); 376 sc->acpi_dev = dev; 377 378 /* Initialize resource manager. */ 379 acpi_rman_io.rm_type = RMAN_ARRAY; 380 acpi_rman_io.rm_start = 0; 381 acpi_rman_io.rm_end = 0xffff; 382 acpi_rman_io.rm_descr = "I/O ports"; 383 if (rman_init(&acpi_rman_io) != 0) 384 panic("acpi rman_init IO ports failed"); 385 acpi_rman_mem.rm_type = RMAN_ARRAY; 386 acpi_rman_mem.rm_start = 0; 387 acpi_rman_mem.rm_end = ~0ul; 388 acpi_rman_mem.rm_descr = "I/O memory addresses"; 389 if (rman_init(&acpi_rman_mem) != 0) 390 panic("acpi rman_init memory failed"); 391 392 /* Install the default address space handlers. */ 393 error = ENXIO; 394 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 395 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 396 if (ACPI_FAILURE(status)) { 397 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 398 AcpiFormatException(status)); 399 goto out; 400 } 401 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 402 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 403 if (ACPI_FAILURE(status)) { 404 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 405 AcpiFormatException(status)); 406 goto out; 407 } 408 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 409 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 410 if (ACPI_FAILURE(status)) { 411 device_printf(dev, "could not initialise PciConfig handler: %s\n", 412 AcpiFormatException(status)); 413 goto out; 414 } 415 416 /* 417 * Note that some systems (specifically, those with namespace evaluation 418 * issues that require the avoidance of parts of the namespace) must 419 * avoid running _INI and _STA on everything, as well as dodging the final 420 * object init pass. 421 * 422 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 423 * 424 * XXX We should arrange for the object init pass after we have attached 425 * all our child devices, but on many systems it works here. 426 */ 427 flags = 0; 428 if (testenv("debug.acpi.avoid")) 429 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 430 431 /* Bring the hardware and basic handlers online. */ 432 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 433 device_printf(dev, "Could not enable ACPI: %s\n", 434 AcpiFormatException(status)); 435 goto out; 436 } 437 438 /* 439 * Call the ECDT probe function to provide EC functionality before 440 * the namespace has been evaluated. 441 */ 442 acpi_ec_ecdt_probe(dev); 443 444 /* Bring device objects and regions online. */ 445 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 446 device_printf(dev, "Could not initialize ACPI objects: %s\n", 447 AcpiFormatException(status)); 448 goto out; 449 } 450 451 /* 452 * Setup our sysctl tree. 453 * 454 * XXX: This doesn't check to make sure that none of these fail. 455 */ 456 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 457 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 458 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 459 device_get_name(dev), CTLFLAG_RD, 0, ""); 460 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 461 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 462 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 463 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 464 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 465 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 466 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 467 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 468 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 469 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 470 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 471 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 472 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 473 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 474 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 475 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 476 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 477 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 478 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 479 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 480 &sc->acpi_sleep_delay, 0, "sleep delay"); 481 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 482 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 483 &sc->acpi_s4bios, 0, "S4BIOS mode"); 484 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 485 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 486 &sc->acpi_verbose, 0, "verbose mode"); 487 488 /* 489 * Default to 1 second before sleeping to give some machines time to 490 * stabilize. 491 */ 492 sc->acpi_sleep_delay = 1; 493 if (bootverbose) 494 sc->acpi_verbose = 1; 495 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) { 496 sc->acpi_verbose = 1; 497 freeenv(env); 498 } 499 500 /* Only enable S4BIOS by default if the FACS says it is available. */ 501 if (AcpiGbl_FACS->S4Bios_f != 0) 502 sc->acpi_s4bios = 1; 503 504 /* 505 * Dispatch the default sleep state to devices. The lid switch is set 506 * to NONE by default to avoid surprising users. 507 */ 508 sc->acpi_power_button_sx = ACPI_STATE_S5; 509 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 510 sc->acpi_standby_sx = ACPI_STATE_S1; 511 sc->acpi_suspend_sx = ACPI_STATE_S3; 512 513 /* Pick the first valid sleep state for the sleep button default. */ 514 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 515 for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++) 516 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 517 sc->acpi_sleep_button_sx = state; 518 break; 519 } 520 521 acpi_enable_fixed_events(sc); 522 523 /* 524 * Scan the namespace and attach/initialise children. 525 */ 526 527 /* Register our shutdown handler. */ 528 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 529 SHUTDOWN_PRI_LAST); 530 531 /* 532 * Register our acpi event handlers. 533 * XXX should be configurable eg. via userland policy manager. 534 */ 535 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 536 sc, ACPI_EVENT_PRI_LAST); 537 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 538 sc, ACPI_EVENT_PRI_LAST); 539 540 /* Flag our initial states. */ 541 sc->acpi_enabled = 1; 542 sc->acpi_sstate = ACPI_STATE_S0; 543 sc->acpi_sleep_disabled = 0; 544 545 /* Create the control device */ 546 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 547 "acpi"); 548 sc->acpi_dev_t->si_drv1 = sc; 549 550#ifdef ACPI_USE_THREADS 551 if ((error = acpi_task_thread_init())) 552 goto out; 553#endif 554 555 if ((error = acpi_machdep_init(dev))) 556 goto out; 557 558 /* Register ACPI again to pass the correct argument of pm_func. */ 559 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 560 561 if (!acpi_disabled("bus")) 562 acpi_probe_children(dev); 563 564 error = 0; 565 566 out: 567 return_VALUE (error); 568} 569 570static int 571acpi_shutdown(device_t dev) 572{ 573 574 /* Allow children to shutdown first. */ 575 bus_generic_shutdown(dev); 576 577 /* 578 * Enable any GPEs that are able to power-on the system (i.e., RTC). 579 * Also, disable any that are not valid for this state (most). 580 */ 581 acpi_wake_prep_walk(ACPI_STATE_S5); 582 583 return (0); 584} 585 586/* 587 * Handle a new device being added 588 */ 589static device_t 590acpi_add_child(device_t bus, int order, const char *name, int unit) 591{ 592 struct acpi_device *ad; 593 device_t child; 594 595 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 596 return (NULL); 597 598 resource_list_init(&ad->ad_rl); 599 600 child = device_add_child_ordered(bus, order, name, unit); 601 if (child != NULL) 602 device_set_ivars(child, ad); 603 return (child); 604} 605 606static int 607acpi_print_child(device_t bus, device_t child) 608{ 609 struct acpi_device *adev = device_get_ivars(child); 610 struct resource_list *rl = &adev->ad_rl; 611 int retval = 0; 612 613 retval += bus_print_child_header(bus, child); 614 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 615 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 616 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 617 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 618 retval += bus_print_child_footer(bus, child); 619 620 return (retval); 621} 622 623/* Location hint for devctl(8) */ 624static int 625acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 626 size_t buflen) 627{ 628 struct acpi_device *dinfo = device_get_ivars(child); 629 630 if (dinfo->ad_handle) 631 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 632 else 633 snprintf(buf, buflen, "unknown"); 634 return (0); 635} 636 637/* PnP information for devctl(8) */ 638static int 639acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 640 size_t buflen) 641{ 642 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 643 ACPI_DEVICE_INFO *adinfo; 644 struct acpi_device *dinfo = device_get_ivars(child); 645 char *end; 646 int error; 647 648 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 649 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 650 if (error) 651 snprintf(buf, buflen, "unknown"); 652 else 653 snprintf(buf, buflen, "_HID=%s _UID=%lu", 654 (adinfo->Valid & ACPI_VALID_HID) ? 655 adinfo->HardwareId.Value : "none", 656 (adinfo->Valid & ACPI_VALID_UID) ? 657 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 658 if (adinfo) 659 AcpiOsFree(adinfo); 660 661 return (0); 662} 663 664/* 665 * Handle per-device ivars 666 */ 667static int 668acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 669{ 670 struct acpi_device *ad; 671 672 if ((ad = device_get_ivars(child)) == NULL) { 673 printf("device has no ivars\n"); 674 return (ENOENT); 675 } 676 677 /* ACPI and ISA compatibility ivars */ 678 switch(index) { 679 case ACPI_IVAR_HANDLE: 680 *(ACPI_HANDLE *)result = ad->ad_handle; 681 break; 682 case ACPI_IVAR_MAGIC: 683 *(int *)result = ad->ad_magic; 684 break; 685 case ACPI_IVAR_PRIVATE: 686 *(void **)result = ad->ad_private; 687 break; 688 case ACPI_IVAR_FLAGS: 689 *(int *)result = ad->ad_flags; 690 break; 691 case ISA_IVAR_VENDORID: 692 case ISA_IVAR_SERIAL: 693 case ISA_IVAR_COMPATID: 694 *(int *)result = -1; 695 break; 696 case ISA_IVAR_LOGICALID: 697 *(int *)result = acpi_isa_get_logicalid(child); 698 break; 699 default: 700 return (ENOENT); 701 } 702 703 return (0); 704} 705 706static int 707acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 708{ 709 struct acpi_device *ad; 710 711 if ((ad = device_get_ivars(child)) == NULL) { 712 printf("device has no ivars\n"); 713 return (ENOENT); 714 } 715 716 switch(index) { 717 case ACPI_IVAR_HANDLE: 718 ad->ad_handle = (ACPI_HANDLE)value; 719 break; 720 case ACPI_IVAR_MAGIC: 721 ad->ad_magic = (int)value; 722 break; 723 case ACPI_IVAR_PRIVATE: 724 ad->ad_private = (void *)value; 725 break; 726 case ACPI_IVAR_FLAGS: 727 ad->ad_flags = (int)value; 728 break; 729 default: 730 panic("bad ivar write request (%d)", index); 731 return (ENOENT); 732 } 733 734 return (0); 735} 736 737/* 738 * Handle child resource allocation/removal 739 */ 740static struct resource_list * 741acpi_get_rlist(device_t dev, device_t child) 742{ 743 struct acpi_device *ad; 744 745 ad = device_get_ivars(child); 746 return (&ad->ad_rl); 747} 748 749static struct resource * 750acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 751 u_long start, u_long end, u_long count, u_int flags) 752{ 753 ACPI_RESOURCE ares; 754 struct acpi_device *ad = device_get_ivars(child); 755 struct resource_list *rl = &ad->ad_rl; 756 struct resource_list_entry *rle; 757 struct resource *res; 758 struct rman *rm; 759 760 /* 761 * If this is an allocation of the "default" range for a given RID, and 762 * we know what the resources for this device are (i.e., they're on the 763 * child's resource list), use those start/end values. 764 */ 765 if (start == 0UL && end == ~0UL) { 766 rle = resource_list_find(rl, type, *rid); 767 if (rle == NULL) 768 return (NULL); 769 start = rle->start; 770 end = rle->end; 771 count = rle->count; 772 } 773 774 /* If we don't manage this address, pass the request up to the parent. */ 775 rle = acpi_sysres_find(type, start); 776 if (rle == NULL) { 777 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 778 start, end, count, flags); 779 } else { 780 781 /* We only handle memory and IO resources through rman. */ 782 switch (type) { 783 case SYS_RES_IOPORT: 784 rm = &acpi_rman_io; 785 break; 786 case SYS_RES_MEMORY: 787 rm = &acpi_rman_mem; 788 break; 789 default: 790 panic("acpi_alloc_resource: invalid res type %d", type); 791 } 792 793 /* If we do know it, allocate it from the local pool. */ 794 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 795 child); 796 if (res == NULL) 797 return (NULL); 798 799 /* Copy the bus tag and handle from the pre-allocated resource. */ 800 rman_set_bustag(res, rman_get_bustag(rle->res)); 801 rman_set_bushandle(res, rman_get_start(res)); 802 803 /* If requested, activate the resource using the parent's method. */ 804 if (flags & RF_ACTIVE) 805 if (bus_activate_resource(child, type, *rid, res) != 0) { 806 rman_release_resource(res); 807 return (NULL); 808 } 809 } 810 811 if (res != NULL && device_get_parent(child) == bus) 812 switch (type) { 813 case SYS_RES_IRQ: 814 /* 815 * Since bus_config_intr() takes immediate effect, we cannot 816 * configure the interrupt associated with a device when we 817 * parse the resources but have to defer it until a driver 818 * actually allocates the interrupt via bus_alloc_resource(). 819 * 820 * XXX: Should we handle the lookup failing? 821 */ 822 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 823 acpi_config_intr(child, &ares); 824 break; 825 } 826 return (res); 827} 828 829static int 830acpi_release_resource(device_t bus, device_t child, int type, int rid, 831 struct resource *r) 832{ 833 int ret; 834 835 /* 836 * If we know about this address, deactivate it and release it to the 837 * local pool. If we don't, pass this request up to the parent. 838 */ 839 if (acpi_sysres_find(type, rman_get_start(r)) == NULL) { 840 if (rman_get_flags(r) & RF_ACTIVE) { 841 ret = bus_deactivate_resource(child, type, rid, r); 842 if (ret != 0) 843 return (ret); 844 } 845 ret = rman_release_resource(r); 846 } else 847 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 848 849 return (ret); 850} 851 852/* Allocate an IO port or memory resource, given its GAS. */ 853struct resource * 854acpi_bus_alloc_gas(device_t dev, int *rid, ACPI_GENERIC_ADDRESS *gas) 855{ 856 int type; 857 858 if (gas == NULL || !ACPI_VALID_ADDRESS(gas->Address) || 859 gas->RegisterBitWidth < 8) 860 return (NULL); 861 862 switch (gas->AddressSpaceId) { 863 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 864 type = SYS_RES_MEMORY; 865 break; 866 case ACPI_ADR_SPACE_SYSTEM_IO: 867 type = SYS_RES_IOPORT; 868 break; 869 default: 870 return (NULL); 871 } 872 873 bus_set_resource(dev, type, *rid, gas->Address, gas->RegisterBitWidth / 8); 874 return (bus_alloc_resource_any(dev, type, rid, RF_ACTIVE)); 875} 876 877/* Probe _HID and _CID for compatible ISA PNP ids. */ 878static uint32_t 879acpi_isa_get_logicalid(device_t dev) 880{ 881 ACPI_DEVICE_INFO *devinfo; 882 ACPI_BUFFER buf; 883 ACPI_HANDLE h; 884 ACPI_STATUS error; 885 u_int32_t pnpid; 886 887 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 888 889 pnpid = 0; 890 buf.Pointer = NULL; 891 buf.Length = ACPI_ALLOCATE_BUFFER; 892 893 /* Fetch and validate the HID. */ 894 if ((h = acpi_get_handle(dev)) == NULL) 895 goto out; 896 error = AcpiGetObjectInfo(h, &buf); 897 if (ACPI_FAILURE(error)) 898 goto out; 899 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 900 901 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 902 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 903 904out: 905 if (buf.Pointer != NULL) 906 AcpiOsFree(buf.Pointer); 907 return_VALUE (pnpid); 908} 909 910static int 911acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 912{ 913 ACPI_DEVICE_INFO *devinfo; 914 ACPI_BUFFER buf; 915 ACPI_HANDLE h; 916 ACPI_STATUS error; 917 uint32_t *pnpid; 918 int valid, i; 919 920 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 921 922 pnpid = cids; 923 valid = 0; 924 buf.Pointer = NULL; 925 buf.Length = ACPI_ALLOCATE_BUFFER; 926 927 /* Fetch and validate the CID */ 928 if ((h = acpi_get_handle(dev)) == NULL) 929 goto out; 930 error = AcpiGetObjectInfo(h, &buf); 931 if (ACPI_FAILURE(error)) 932 goto out; 933 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 934 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 935 goto out; 936 937 if (devinfo->CompatibilityId.Count < count) 938 count = devinfo->CompatibilityId.Count; 939 for (i = 0; i < count; i++) { 940 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 941 continue; 942 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 943 valid++; 944 } 945 946out: 947 if (buf.Pointer != NULL) 948 AcpiOsFree(buf.Pointer); 949 return_VALUE (valid); 950} 951 952static char * 953acpi_device_id_probe(device_t bus, device_t dev, char **ids) 954{ 955 ACPI_HANDLE h; 956 int i; 957 958 h = acpi_get_handle(dev); 959 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 960 return (NULL); 961 962 /* Try to match one of the array of IDs with a HID or CID. */ 963 for (i = 0; ids[i] != NULL; i++) { 964 if (acpi_MatchHid(h, ids[i])) 965 return (ids[i]); 966 } 967 return (NULL); 968} 969 970static ACPI_STATUS 971acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 972 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 973{ 974 ACPI_HANDLE h; 975 976 if (dev == NULL) 977 h = ACPI_ROOT_OBJECT; 978 else if ((h = acpi_get_handle(dev)) == NULL) 979 return (AE_BAD_PARAMETER); 980 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 981} 982 983/* Callback arg for our implementation of walking the namespace. */ 984struct acpi_device_scan_ctx { 985 acpi_scan_cb_t user_fn; 986 void *arg; 987 ACPI_HANDLE parent; 988}; 989 990static ACPI_STATUS 991acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 992{ 993 struct acpi_device_scan_ctx *ctx; 994 device_t dev, old_dev; 995 ACPI_STATUS status; 996 ACPI_OBJECT_TYPE type; 997 998 /* 999 * Skip this device if we think we'll have trouble with it or it is 1000 * the parent where the scan began. 1001 */ 1002 ctx = (struct acpi_device_scan_ctx *)arg; 1003 if (acpi_avoid(h) || h == ctx->parent) 1004 return (AE_OK); 1005 1006 /* If this is not a valid device type (e.g., a method), skip it. */ 1007 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1008 return (AE_OK); 1009 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1010 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1011 return (AE_OK); 1012 1013 /* 1014 * Call the user function with the current device. If it is unchanged 1015 * afterwards, return. Otherwise, we update the handle to the new dev. 1016 */ 1017 old_dev = acpi_get_device(h); 1018 dev = old_dev; 1019 status = ctx->user_fn(h, &dev, level, ctx->arg); 1020 if (ACPI_FAILURE(status) || old_dev == dev) 1021 return (status); 1022 1023 /* Remove the old child and its connection to the handle. */ 1024 if (old_dev != NULL) { 1025 device_delete_child(device_get_parent(old_dev), old_dev); 1026 AcpiDetachData(h, acpi_fake_objhandler); 1027 } 1028 1029 /* Recreate the handle association if the user created a device. */ 1030 if (dev != NULL) 1031 AcpiAttachData(h, acpi_fake_objhandler, dev); 1032 1033 return (AE_OK); 1034} 1035 1036static ACPI_STATUS 1037acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1038 acpi_scan_cb_t user_fn, void *arg) 1039{ 1040 ACPI_HANDLE h; 1041 struct acpi_device_scan_ctx ctx; 1042 1043 if (acpi_disabled("children")) 1044 return (AE_OK); 1045 1046 if (dev == NULL) 1047 h = ACPI_ROOT_OBJECT; 1048 else if ((h = acpi_get_handle(dev)) == NULL) 1049 return (AE_BAD_PARAMETER); 1050 ctx.user_fn = user_fn; 1051 ctx.arg = arg; 1052 ctx.parent = h; 1053 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1054 acpi_device_scan_cb, &ctx, NULL)); 1055} 1056 1057static int 1058acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1059{ 1060 int result, cid_count, i; 1061 uint32_t lid, cids[8]; 1062 1063 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1064 1065 /* 1066 * ISA-style drivers attached to ACPI may persist and 1067 * probe manually if we return ENOENT. We never want 1068 * that to happen, so don't ever return it. 1069 */ 1070 result = ENXIO; 1071 1072 /* Scan the supplied IDs for a match */ 1073 lid = acpi_isa_get_logicalid(child); 1074 cid_count = acpi_isa_get_compatid(child, cids, 8); 1075 while (ids && ids->ip_id) { 1076 if (lid == ids->ip_id) { 1077 result = 0; 1078 goto out; 1079 } 1080 for (i = 0; i < cid_count; i++) { 1081 if (cids[i] == ids->ip_id) { 1082 result = 0; 1083 goto out; 1084 } 1085 } 1086 ids++; 1087 } 1088 1089 out: 1090 return_VALUE (result); 1091} 1092 1093/* 1094 * Scan relevant portions of the ACPI namespace and attach child devices. 1095 * 1096 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and 1097 * \_SB_ scopes, and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 1098 */ 1099static void 1100acpi_probe_children(device_t bus) 1101{ 1102 ACPI_HANDLE parent; 1103 ACPI_STATUS status; 1104 int i; 1105 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 1106 1107 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1108 1109 /* 1110 * Scan the namespace and insert placeholders for all the devices that 1111 * we find. We also probe/attach any early devices. 1112 * 1113 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1114 * we want to create nodes for all devices, not just those that are 1115 * currently present. (This assumes that we don't want to create/remove 1116 * devices as they appear, which might be smarter.) 1117 */ 1118 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1119 for (i = 0; scopes[i] != NULL; i++) { 1120 status = AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent); 1121 if (ACPI_SUCCESS(status)) { 1122 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, 1123 bus, NULL); 1124 } 1125 } 1126 1127 /* Create any static children by calling device identify methods. */ 1128 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1129 bus_generic_probe(bus); 1130 1131 /* Probe/attach all children, created staticly and from the namespace. */ 1132 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1133 bus_generic_attach(bus); 1134 1135 /* 1136 * Some of these children may have attached others as part of their attach 1137 * process (eg. the root PCI bus driver), so rescan. 1138 */ 1139 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1140 bus_generic_attach(bus); 1141 1142 /* Attach wake sysctls. */ 1143 acpi_wake_sysctl_walk(bus); 1144 1145 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1146 return_VOID; 1147} 1148 1149/* 1150 * Determine the probe order for a given device and return non-zero if it 1151 * should be attached immediately. 1152 */ 1153static int 1154acpi_probe_order(ACPI_HANDLE handle, int *order) 1155{ 1156 int ret; 1157 1158 /* 1159 * 1. I/O port and memory system resource holders 1160 * 2. Embedded controllers (to handle early accesses) 1161 */ 1162 ret = 0; 1163 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) { 1164 *order = 1; 1165 ret = 1; 1166 } else if (acpi_MatchHid(handle, "PNP0C09")) { 1167 *order = 2; 1168 ret = 1; 1169 } 1170 1171 return (ret); 1172} 1173 1174/* 1175 * Evaluate a child device and determine whether we might attach a device to 1176 * it. 1177 */ 1178static ACPI_STATUS 1179acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1180{ 1181 ACPI_OBJECT_TYPE type; 1182 device_t child, bus; 1183 int order, probe_now; 1184 1185 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1186 1187 /* Skip this device if we think we'll have trouble with it. */ 1188 if (acpi_avoid(handle)) 1189 return_ACPI_STATUS (AE_OK); 1190 1191 bus = (device_t)context; 1192 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1193 switch (type) { 1194 case ACPI_TYPE_DEVICE: 1195 case ACPI_TYPE_PROCESSOR: 1196 case ACPI_TYPE_THERMAL: 1197 case ACPI_TYPE_POWER: 1198 if (acpi_disabled("children")) 1199 break; 1200 1201 /* 1202 * Create a placeholder device for this node. Sort the placeholder 1203 * so that the probe/attach passes will run breadth-first. Orders 1204 * less than 10 are reserved for special objects (i.e., system 1205 * resources). Larger values are used for all other devices. 1206 */ 1207 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", 1208 acpi_name(handle))); 1209 order = (level + 1) * 10; 1210 probe_now = acpi_probe_order(handle, &order); 1211 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1212 if (child == NULL) 1213 break; 1214 1215 /* Associate the handle with the device_t and vice versa. */ 1216 acpi_set_handle(child, handle); 1217 AcpiAttachData(handle, acpi_fake_objhandler, child); 1218 1219 /* 1220 * Check that the device is present. If it's not present, 1221 * leave it disabled (so that we have a device_t attached to 1222 * the handle, but we don't probe it). 1223 */ 1224 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1225 device_disable(child); 1226 break; 1227 } 1228 1229 /* 1230 * Get the device's resource settings and attach them. 1231 * Note that if the device has _PRS but no _CRS, we need 1232 * to decide when it's appropriate to try to configure the 1233 * device. Ignore the return value here; it's OK for the 1234 * device not to have any resources. 1235 */ 1236 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1237 1238 /* If order was overridden, probe/attach now rather than later. */ 1239 if (probe_now) 1240 device_probe_and_attach(child); 1241 break; 1242 } 1243 } 1244 1245 return_ACPI_STATUS (AE_OK); 1246} 1247 1248/* 1249 * AcpiAttachData() requires an object handler but never uses it. This is a 1250 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1251 */ 1252void 1253acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data) 1254{ 1255} 1256 1257static void 1258acpi_shutdown_final(void *arg, int howto) 1259{ 1260 ACPI_STATUS status; 1261 1262 /* 1263 * XXX Shutdown code should only run on the BSP (cpuid 0). 1264 * Some chipsets do not power off the system correctly if called from 1265 * an AP. 1266 */ 1267 if ((howto & RB_POWEROFF) != 0) { 1268 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1269 if (ACPI_FAILURE(status)) { 1270 printf("AcpiEnterSleepStatePrep failed - %s\n", 1271 AcpiFormatException(status)); 1272 return; 1273 } 1274 printf("Powering system off using ACPI\n"); 1275 ACPI_DISABLE_IRQS(); 1276 status = AcpiEnterSleepState(ACPI_STATE_S5); 1277 if (ACPI_FAILURE(status)) { 1278 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1279 } else { 1280 DELAY(1000000); 1281 printf("ACPI power-off failed - timeout\n"); 1282 } 1283 } else { 1284 printf("Shutting down ACPI\n"); 1285 AcpiTerminate(); 1286 } 1287} 1288 1289static void 1290acpi_enable_fixed_events(struct acpi_softc *sc) 1291{ 1292 static int first_time = 1; 1293 1294 /* Enable and clear fixed events and install handlers. */ 1295 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 1296 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1297 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1298 acpi_event_power_button_sleep, sc); 1299 if (first_time) 1300 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1301 } 1302 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 1303 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1304 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1305 acpi_event_sleep_button_sleep, sc); 1306 if (first_time) 1307 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1308 } 1309 1310 first_time = 0; 1311} 1312 1313/* 1314 * Returns true if the device is actually present and should 1315 * be attached to. This requires the present, enabled, UI-visible 1316 * and diagnostics-passed bits to be set. 1317 */ 1318BOOLEAN 1319acpi_DeviceIsPresent(device_t dev) 1320{ 1321 ACPI_DEVICE_INFO *devinfo; 1322 ACPI_HANDLE h; 1323 ACPI_BUFFER buf; 1324 ACPI_STATUS error; 1325 int ret; 1326 1327 ret = FALSE; 1328 if ((h = acpi_get_handle(dev)) == NULL) 1329 return (FALSE); 1330 buf.Pointer = NULL; 1331 buf.Length = ACPI_ALLOCATE_BUFFER; 1332 error = AcpiGetObjectInfo(h, &buf); 1333 if (ACPI_FAILURE(error)) 1334 return (FALSE); 1335 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1336 1337 /* If no _STA method, must be present */ 1338 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1339 ret = TRUE; 1340 1341 /* Return true for 'present' and 'functioning' */ 1342 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1343 ret = TRUE; 1344 1345 AcpiOsFree(buf.Pointer); 1346 return (ret); 1347} 1348 1349/* 1350 * Returns true if the battery is actually present and inserted. 1351 */ 1352BOOLEAN 1353acpi_BatteryIsPresent(device_t dev) 1354{ 1355 ACPI_DEVICE_INFO *devinfo; 1356 ACPI_HANDLE h; 1357 ACPI_BUFFER buf; 1358 ACPI_STATUS error; 1359 int ret; 1360 1361 ret = FALSE; 1362 if ((h = acpi_get_handle(dev)) == NULL) 1363 return (FALSE); 1364 buf.Pointer = NULL; 1365 buf.Length = ACPI_ALLOCATE_BUFFER; 1366 error = AcpiGetObjectInfo(h, &buf); 1367 if (ACPI_FAILURE(error)) 1368 return (FALSE); 1369 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1370 1371 /* If no _STA method, must be present */ 1372 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1373 ret = TRUE; 1374 1375 /* Return true for 'present', 'battery present', and 'functioning' */ 1376 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1377 ret = TRUE; 1378 1379 AcpiOsFree(buf.Pointer); 1380 return (ret); 1381} 1382 1383/* 1384 * Match a HID string against a handle 1385 */ 1386static BOOLEAN 1387acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1388{ 1389 ACPI_DEVICE_INFO *devinfo; 1390 ACPI_BUFFER buf; 1391 ACPI_STATUS error; 1392 int ret, i; 1393 1394 ret = FALSE; 1395 if (hid == NULL || h == NULL) 1396 return (ret); 1397 buf.Pointer = NULL; 1398 buf.Length = ACPI_ALLOCATE_BUFFER; 1399 error = AcpiGetObjectInfo(h, &buf); 1400 if (ACPI_FAILURE(error)) 1401 return (ret); 1402 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1403 1404 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1405 strcmp(hid, devinfo->HardwareId.Value) == 0) 1406 ret = TRUE; 1407 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1408 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1409 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1410 ret = TRUE; 1411 break; 1412 } 1413 } 1414 } 1415 1416 AcpiOsFree(buf.Pointer); 1417 return (ret); 1418} 1419 1420/* 1421 * Return the handle of a named object within our scope, ie. that of (parent) 1422 * or one if its parents. 1423 */ 1424ACPI_STATUS 1425acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1426{ 1427 ACPI_HANDLE r; 1428 ACPI_STATUS status; 1429 1430 /* Walk back up the tree to the root */ 1431 for (;;) { 1432 status = AcpiGetHandle(parent, path, &r); 1433 if (ACPI_SUCCESS(status)) { 1434 *result = r; 1435 return (AE_OK); 1436 } 1437 /* XXX Return error here? */ 1438 if (status != AE_NOT_FOUND) 1439 return (AE_OK); 1440 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1441 return (AE_NOT_FOUND); 1442 parent = r; 1443 } 1444} 1445 1446/* Find the difference between two PM tick counts. */ 1447uint32_t 1448acpi_TimerDelta(uint32_t end, uint32_t start) 1449{ 1450 uint32_t delta; 1451 1452 if (end >= start) 1453 delta = end - start; 1454 else if (AcpiGbl_FADT->TmrValExt == 0) 1455 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 1456 else 1457 delta = ((0xFFFFFFFF - start) + end + 1); 1458 return (delta); 1459} 1460 1461/* 1462 * Allocate a buffer with a preset data size. 1463 */ 1464ACPI_BUFFER * 1465acpi_AllocBuffer(int size) 1466{ 1467 ACPI_BUFFER *buf; 1468 1469 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1470 return (NULL); 1471 buf->Length = size; 1472 buf->Pointer = (void *)(buf + 1); 1473 return (buf); 1474} 1475 1476ACPI_STATUS 1477acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1478{ 1479 ACPI_OBJECT arg1; 1480 ACPI_OBJECT_LIST args; 1481 1482 arg1.Type = ACPI_TYPE_INTEGER; 1483 arg1.Integer.Value = number; 1484 args.Count = 1; 1485 args.Pointer = &arg1; 1486 1487 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1488} 1489 1490/* 1491 * Evaluate a path that should return an integer. 1492 */ 1493ACPI_STATUS 1494acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1495{ 1496 ACPI_STATUS status; 1497 ACPI_BUFFER buf; 1498 ACPI_OBJECT param; 1499 1500 if (handle == NULL) 1501 handle = ACPI_ROOT_OBJECT; 1502 1503 /* 1504 * Assume that what we've been pointed at is an Integer object, or 1505 * a method that will return an Integer. 1506 */ 1507 buf.Pointer = ¶m; 1508 buf.Length = sizeof(param); 1509 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1510 if (ACPI_SUCCESS(status)) { 1511 if (param.Type == ACPI_TYPE_INTEGER) 1512 *number = param.Integer.Value; 1513 else 1514 status = AE_TYPE; 1515 } 1516 1517 /* 1518 * In some applications, a method that's expected to return an Integer 1519 * may instead return a Buffer (probably to simplify some internal 1520 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1521 * convert it into an Integer as best we can. 1522 * 1523 * This is a hack. 1524 */ 1525 if (status == AE_BUFFER_OVERFLOW) { 1526 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1527 status = AE_NO_MEMORY; 1528 } else { 1529 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1530 if (ACPI_SUCCESS(status)) 1531 status = acpi_ConvertBufferToInteger(&buf, number); 1532 AcpiOsFree(buf.Pointer); 1533 } 1534 } 1535 return (status); 1536} 1537 1538ACPI_STATUS 1539acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1540{ 1541 ACPI_OBJECT *p; 1542 UINT8 *val; 1543 int i; 1544 1545 p = (ACPI_OBJECT *)bufp->Pointer; 1546 if (p->Type == ACPI_TYPE_INTEGER) { 1547 *number = p->Integer.Value; 1548 return (AE_OK); 1549 } 1550 if (p->Type != ACPI_TYPE_BUFFER) 1551 return (AE_TYPE); 1552 if (p->Buffer.Length > sizeof(int)) 1553 return (AE_BAD_DATA); 1554 1555 *number = 0; 1556 val = p->Buffer.Pointer; 1557 for (i = 0; i < p->Buffer.Length; i++) 1558 *number += val[i] << (i * 8); 1559 return (AE_OK); 1560} 1561 1562/* 1563 * Iterate over the elements of an a package object, calling the supplied 1564 * function for each element. 1565 * 1566 * XXX possible enhancement might be to abort traversal on error. 1567 */ 1568ACPI_STATUS 1569acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1570 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1571{ 1572 ACPI_OBJECT *comp; 1573 int i; 1574 1575 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1576 return (AE_BAD_PARAMETER); 1577 1578 /* Iterate over components */ 1579 i = 0; 1580 comp = pkg->Package.Elements; 1581 for (; i < pkg->Package.Count; i++, comp++) 1582 func(comp, arg); 1583 1584 return (AE_OK); 1585} 1586 1587/* 1588 * Find the (index)th resource object in a set. 1589 */ 1590ACPI_STATUS 1591acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1592{ 1593 ACPI_RESOURCE *rp; 1594 int i; 1595 1596 rp = (ACPI_RESOURCE *)buf->Pointer; 1597 i = index; 1598 while (i-- > 0) { 1599 /* Range check */ 1600 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1601 return (AE_BAD_PARAMETER); 1602 1603 /* Check for terminator */ 1604 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1605 return (AE_NOT_FOUND); 1606 rp = ACPI_NEXT_RESOURCE(rp); 1607 } 1608 if (resp != NULL) 1609 *resp = rp; 1610 1611 return (AE_OK); 1612} 1613 1614/* 1615 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1616 * 1617 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1618 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1619 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1620 * resources. 1621 */ 1622#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1623 1624ACPI_STATUS 1625acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1626{ 1627 ACPI_RESOURCE *rp; 1628 void *newp; 1629 1630 /* Initialise the buffer if necessary. */ 1631 if (buf->Pointer == NULL) { 1632 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1633 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1634 return (AE_NO_MEMORY); 1635 rp = (ACPI_RESOURCE *)buf->Pointer; 1636 rp->Id = ACPI_RSTYPE_END_TAG; 1637 rp->Length = 0; 1638 } 1639 if (res == NULL) 1640 return (AE_OK); 1641 1642 /* 1643 * Scan the current buffer looking for the terminator. 1644 * This will either find the terminator or hit the end 1645 * of the buffer and return an error. 1646 */ 1647 rp = (ACPI_RESOURCE *)buf->Pointer; 1648 for (;;) { 1649 /* Range check, don't go outside the buffer */ 1650 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1651 return (AE_BAD_PARAMETER); 1652 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1653 break; 1654 rp = ACPI_NEXT_RESOURCE(rp); 1655 } 1656 1657 /* 1658 * Check the size of the buffer and expand if required. 1659 * 1660 * Required size is: 1661 * size of existing resources before terminator + 1662 * size of new resource and header + 1663 * size of terminator. 1664 * 1665 * Note that this loop should really only run once, unless 1666 * for some reason we are stuffing a *really* huge resource. 1667 */ 1668 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1669 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1670 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1671 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1672 return (AE_NO_MEMORY); 1673 bcopy(buf->Pointer, newp, buf->Length); 1674 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1675 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1676 AcpiOsFree(buf->Pointer); 1677 buf->Pointer = newp; 1678 buf->Length += buf->Length; 1679 } 1680 1681 /* Insert the new resource. */ 1682 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1683 1684 /* And add the terminator. */ 1685 rp = ACPI_NEXT_RESOURCE(rp); 1686 rp->Id = ACPI_RSTYPE_END_TAG; 1687 rp->Length = 0; 1688 1689 return (AE_OK); 1690} 1691 1692/* 1693 * Set interrupt model. 1694 */ 1695ACPI_STATUS 1696acpi_SetIntrModel(int model) 1697{ 1698 1699 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 1700} 1701 1702static void 1703acpi_sleep_enable(void *arg) 1704{ 1705 1706 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1707} 1708 1709/* 1710 * Set the system sleep state 1711 * 1712 * Currently we support S1-S5 but S4 is only S4BIOS 1713 */ 1714ACPI_STATUS 1715acpi_SetSleepState(struct acpi_softc *sc, int state) 1716{ 1717 ACPI_STATUS status = AE_OK; 1718 UINT8 TypeA; 1719 UINT8 TypeB; 1720 1721 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1722 1723 /* Avoid reentry if already attempting to suspend. */ 1724 if (sc->acpi_sstate != ACPI_STATE_S0) 1725 return_ACPI_STATUS (AE_BAD_PARAMETER); 1726 1727 /* We recently woke up so don't suspend again for a while. */ 1728 if (sc->acpi_sleep_disabled) 1729 return_ACPI_STATUS (AE_OK); 1730 1731 switch (state) { 1732 case ACPI_STATE_S1: 1733 case ACPI_STATE_S2: 1734 case ACPI_STATE_S3: 1735 case ACPI_STATE_S4: 1736 status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB); 1737 if (status == AE_NOT_FOUND) { 1738 device_printf(sc->acpi_dev, 1739 "Sleep state S%d not supported by BIOS\n", state); 1740 break; 1741 } else if (ACPI_FAILURE(status)) { 1742 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 1743 AcpiFormatException(status)); 1744 break; 1745 } 1746 1747 sc->acpi_sstate = state; 1748 sc->acpi_sleep_disabled = 1; 1749 1750 /* Enable any GPEs as appropriate and requested by the user. */ 1751 acpi_wake_prep_walk(state); 1752 1753 /* 1754 * Inform all devices that we are going to sleep. If at least one 1755 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 1756 * 1757 * XXX Note that a better two-pass approach with a 'veto' pass 1758 * followed by a "real thing" pass would be better, but the current 1759 * bus interface does not provide for this. 1760 */ 1761 if (DEVICE_SUSPEND(root_bus) != 0) 1762 return_ACPI_STATUS (AE_ERROR); 1763 1764 status = AcpiEnterSleepStatePrep(state); 1765 if (ACPI_FAILURE(status)) { 1766 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1767 AcpiFormatException(status)); 1768 break; 1769 } 1770 1771 if (sc->acpi_sleep_delay > 0) 1772 DELAY(sc->acpi_sleep_delay * 1000000); 1773 1774 if (state != ACPI_STATE_S1) { 1775 acpi_sleep_machdep(sc, state); 1776 1777 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1778 if (state == ACPI_STATE_S4) 1779 AcpiEnable(); 1780 } else { 1781 ACPI_DISABLE_IRQS(); 1782 status = AcpiEnterSleepState((UINT8)state); 1783 if (ACPI_FAILURE(status)) { 1784 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 1785 AcpiFormatException(status)); 1786 break; 1787 } 1788 } 1789 1790 /* Resume devices, re-enable GPEs and fixed events. */ 1791 acpi_wake_prep_walk(state); 1792 AcpiLeaveSleepState((UINT8)state); 1793 DEVICE_RESUME(root_bus); 1794 sc->acpi_sstate = ACPI_STATE_S0; 1795 acpi_enable_fixed_events(sc); 1796 break; 1797 case ACPI_STATE_S5: 1798 /* 1799 * Shut down cleanly and power off. This will call us back through the 1800 * shutdown handlers. 1801 */ 1802 shutdown_nice(RB_POWEROFF); 1803 break; 1804 case ACPI_STATE_S0: 1805 default: 1806 status = AE_BAD_PARAMETER; 1807 break; 1808 } 1809 1810 /* Disable a second sleep request for a short period */ 1811 if (sc->acpi_sleep_disabled) 1812 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 1813 1814 return_ACPI_STATUS (status); 1815} 1816 1817/* Initialize a device's wake GPE. */ 1818int 1819acpi_wake_init(device_t dev, int type) 1820{ 1821 struct acpi_prw_data prw; 1822 1823 /* Evaluate _PRW to find the GPE. */ 1824 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 1825 return (ENXIO); 1826 1827 /* Set the requested type for the GPE (runtime, wake, or both). */ 1828 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 1829 device_printf(dev, "set GPE type failed\n"); 1830 return (ENXIO); 1831 } 1832 1833 return (0); 1834} 1835 1836/* Enable or disable the device's wake GPE. */ 1837int 1838acpi_wake_set_enable(device_t dev, int enable) 1839{ 1840 struct acpi_prw_data prw; 1841 ACPI_HANDLE handle; 1842 ACPI_STATUS status; 1843 int flags; 1844 1845 /* Make sure the device supports waking the system and get the GPE. */ 1846 handle = acpi_get_handle(dev); 1847 if (acpi_parse_prw(handle, &prw) != 0) 1848 return (ENXIO); 1849 1850 flags = acpi_get_flags(dev); 1851 if (enable) { 1852 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 1853 if (ACPI_FAILURE(status)) { 1854 device_printf(dev, "enable wake failed\n"); 1855 return (ENXIO); 1856 } 1857 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 1858 } else { 1859 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 1860 if (ACPI_FAILURE(status)) { 1861 device_printf(dev, "disable wake failed\n"); 1862 return (ENXIO); 1863 } 1864 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 1865 } 1866 1867 return (0); 1868} 1869 1870static int 1871acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 1872{ 1873 struct acpi_prw_data prw; 1874 device_t dev; 1875 1876 /* Check that this is a wake-capable device and get its GPE. */ 1877 if (acpi_parse_prw(handle, &prw) != 0) 1878 return (ENXIO); 1879 dev = acpi_get_device(handle); 1880 1881 /* 1882 * The destination sleep state must be less than (i.e., higher power) 1883 * or equal to the value specified by _PRW. If this GPE cannot be 1884 * enabled for the next sleep state, then disable it. If it can and 1885 * the user requested it be enabled, turn on any required power resources 1886 * and set _PSW. 1887 */ 1888 if (sstate > prw.lowest_wake) { 1889 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 1890 if (bootverbose) 1891 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 1892 acpi_name(handle), sstate); 1893 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 1894 acpi_pwr_wake_enable(handle, 1); 1895 acpi_SetInteger(handle, "_PSW", 1); 1896 if (bootverbose) 1897 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 1898 acpi_name(handle), sstate); 1899 } 1900 1901 return (0); 1902} 1903 1904static int 1905acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 1906{ 1907 struct acpi_prw_data prw; 1908 device_t dev; 1909 1910 /* 1911 * Check that this is a wake-capable device and get its GPE. Return 1912 * now if the user didn't enable this device for wake. 1913 */ 1914 if (acpi_parse_prw(handle, &prw) != 0) 1915 return (ENXIO); 1916 dev = acpi_get_device(handle); 1917 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 1918 return (0); 1919 1920 /* 1921 * If this GPE couldn't be enabled for the previous sleep state, it was 1922 * disabled before going to sleep so re-enable it. If it was enabled, 1923 * clear _PSW and turn off any power resources it used. 1924 */ 1925 if (sstate > prw.lowest_wake) { 1926 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 1927 if (bootverbose) 1928 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 1929 } else { 1930 acpi_SetInteger(handle, "_PSW", 0); 1931 acpi_pwr_wake_enable(handle, 0); 1932 if (bootverbose) 1933 device_printf(dev, "run_prep cleaned up for %s\n", 1934 acpi_name(handle)); 1935 } 1936 1937 return (0); 1938} 1939 1940static ACPI_STATUS 1941acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1942{ 1943 int sstate; 1944 1945 /* If suspending, run the sleep prep function, otherwise wake. */ 1946 sstate = *(int *)context; 1947 if (AcpiGbl_SystemAwakeAndRunning) 1948 acpi_wake_sleep_prep(handle, sstate); 1949 else 1950 acpi_wake_run_prep(handle, sstate); 1951 return (AE_OK); 1952} 1953 1954/* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 1955static int 1956acpi_wake_prep_walk(int sstate) 1957{ 1958 ACPI_HANDLE sb_handle; 1959 1960 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 1961 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 1962 acpi_wake_prep, &sstate, NULL); 1963 return (0); 1964} 1965 1966/* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 1967static int 1968acpi_wake_sysctl_walk(device_t dev) 1969{ 1970 int error, i, numdevs; 1971 device_t *devlist; 1972 device_t child; 1973 ACPI_STATUS status; 1974 1975 error = device_get_children(dev, &devlist, &numdevs); 1976 if (error != 0 || numdevs == 0) 1977 return (error); 1978 for (i = 0; i < numdevs; i++) { 1979 child = devlist[i]; 1980 acpi_wake_sysctl_walk(child); 1981 if (!device_is_attached(child)) 1982 continue; 1983 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 1984 if (ACPI_SUCCESS(status)) { 1985 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 1986 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 1987 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 1988 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 1989 } 1990 } 1991 free(devlist, M_TEMP); 1992 1993 return (0); 1994} 1995 1996/* Enable or disable wake from userland. */ 1997static int 1998acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 1999{ 2000 int enable, error; 2001 device_t dev; 2002 2003 dev = (device_t)arg1; 2004 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2005 2006 error = sysctl_handle_int(oidp, &enable, 0, req); 2007 if (error != 0 || req->newptr == NULL) 2008 return (error); 2009 if (enable != 0 && enable != 1) 2010 return (EINVAL); 2011 2012 return (acpi_wake_set_enable(dev, enable)); 2013} 2014 2015/* Parse a device's _PRW into a structure. */ 2016int 2017acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2018{ 2019 ACPI_STATUS status; 2020 ACPI_BUFFER prw_buffer; 2021 ACPI_OBJECT *res, *res2; 2022 int error, i, power_count; 2023 2024 if (h == NULL || prw == NULL) 2025 return (EINVAL); 2026 2027 /* 2028 * The _PRW object (7.2.9) is only required for devices that have the 2029 * ability to wake the system from a sleeping state. 2030 */ 2031 error = EINVAL; 2032 prw_buffer.Pointer = NULL; 2033 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2034 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2035 if (ACPI_FAILURE(status)) 2036 return (ENOENT); 2037 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2038 if (res == NULL) 2039 return (ENOENT); 2040 if (!ACPI_PKG_VALID(res, 2)) 2041 goto out; 2042 2043 /* 2044 * Element 1 of the _PRW object: 2045 * The lowest power system sleeping state that can be entered while still 2046 * providing wake functionality. The sleeping state being entered must 2047 * be less than (i.e., higher power) or equal to this value. 2048 */ 2049 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2050 goto out; 2051 2052 /* 2053 * Element 0 of the _PRW object: 2054 */ 2055 switch (res->Package.Elements[0].Type) { 2056 case ACPI_TYPE_INTEGER: 2057 /* 2058 * If the data type of this package element is numeric, then this 2059 * _PRW package element is the bit index in the GPEx_EN, in the 2060 * GPE blocks described in the FADT, of the enable bit that is 2061 * enabled for the wake event. 2062 */ 2063 prw->gpe_handle = NULL; 2064 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2065 error = 0; 2066 break; 2067 case ACPI_TYPE_PACKAGE: 2068 /* 2069 * If the data type of this package element is a package, then this 2070 * _PRW package element is itself a package containing two 2071 * elements. The first is an object reference to the GPE Block 2072 * device that contains the GPE that will be triggered by the wake 2073 * event. The second element is numeric and it contains the bit 2074 * index in the GPEx_EN, in the GPE Block referenced by the 2075 * first element in the package, of the enable bit that is enabled for 2076 * the wake event. 2077 * 2078 * For example, if this field is a package then it is of the form: 2079 * Package() {\_SB.PCI0.ISA.GPE, 2} 2080 */ 2081 res2 = &res->Package.Elements[0]; 2082 if (!ACPI_PKG_VALID(res2, 2)) 2083 goto out; 2084 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2085 if (prw->gpe_handle == NULL) 2086 goto out; 2087 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2088 goto out; 2089 error = 0; 2090 break; 2091 default: 2092 goto out; 2093 } 2094 2095 /* Elements 2 to N of the _PRW object are power resources. */ 2096 power_count = res->Package.Count - 2; 2097 if (power_count > ACPI_PRW_MAX_POWERRES) { 2098 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2099 power_count = 0; 2100 } 2101 prw->power_res_count = power_count; 2102 for (i = 0; i < power_count; i++) 2103 prw->power_res[i] = res->Package.Elements[i]; 2104 2105out: 2106 if (prw_buffer.Pointer != NULL) 2107 AcpiOsFree(prw_buffer.Pointer); 2108 return (error); 2109} 2110 2111/* 2112 * Enable/Disable ACPI 2113 */ 2114ACPI_STATUS 2115acpi_Enable(struct acpi_softc *sc) 2116{ 2117 ACPI_STATUS status; 2118 u_int32_t flags; 2119 2120 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2121 2122 status = AE_ERROR; 2123 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 2124 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 2125 2126 if (!sc->acpi_enabled) 2127 status = AcpiEnableSubsystem(flags); 2128 if (ACPI_SUCCESS(status)) 2129 sc->acpi_enabled = 1; 2130 2131 return_ACPI_STATUS (status); 2132} 2133 2134ACPI_STATUS 2135acpi_Disable(struct acpi_softc *sc) 2136{ 2137 ACPI_STATUS status; 2138 2139 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2140 2141 status = AE_ERROR; 2142 if (sc->acpi_enabled) 2143 status = AcpiDisable(); 2144 if (ACPI_SUCCESS(status)) 2145 sc->acpi_enabled = 0; 2146 2147 return_ACPI_STATUS (status); 2148} 2149 2150/* 2151 * ACPI Event Handlers 2152 */ 2153 2154/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2155 2156static void 2157acpi_system_eventhandler_sleep(void *arg, int state) 2158{ 2159 2160 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2161 2162 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2163 acpi_SetSleepState((struct acpi_softc *)arg, state); 2164 2165 return_VOID; 2166} 2167 2168static void 2169acpi_system_eventhandler_wakeup(void *arg, int state) 2170{ 2171 2172 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2173 2174 /* Currently, nothing to do for wakeup. */ 2175 2176 return_VOID; 2177} 2178 2179/* 2180 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2181 */ 2182UINT32 2183acpi_event_power_button_sleep(void *context) 2184{ 2185 struct acpi_softc *sc = (struct acpi_softc *)context; 2186 2187 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2188 2189 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2190 2191 return_VALUE (ACPI_INTERRUPT_HANDLED); 2192} 2193 2194UINT32 2195acpi_event_power_button_wake(void *context) 2196{ 2197 struct acpi_softc *sc = (struct acpi_softc *)context; 2198 2199 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2200 2201 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2202 2203 return_VALUE (ACPI_INTERRUPT_HANDLED); 2204} 2205 2206UINT32 2207acpi_event_sleep_button_sleep(void *context) 2208{ 2209 struct acpi_softc *sc = (struct acpi_softc *)context; 2210 2211 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2212 2213 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2214 2215 return_VALUE (ACPI_INTERRUPT_HANDLED); 2216} 2217 2218UINT32 2219acpi_event_sleep_button_wake(void *context) 2220{ 2221 struct acpi_softc *sc = (struct acpi_softc *)context; 2222 2223 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2224 2225 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2226 2227 return_VALUE (ACPI_INTERRUPT_HANDLED); 2228} 2229 2230/* 2231 * XXX This static buffer is suboptimal. There is no locking so only 2232 * use this for single-threaded callers. 2233 */ 2234char * 2235acpi_name(ACPI_HANDLE handle) 2236{ 2237 ACPI_BUFFER buf; 2238 static char data[256]; 2239 2240 buf.Length = sizeof(data); 2241 buf.Pointer = data; 2242 2243 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2244 return (data); 2245 return ("(unknown)"); 2246} 2247 2248/* 2249 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2250 * parts of the namespace. 2251 */ 2252int 2253acpi_avoid(ACPI_HANDLE handle) 2254{ 2255 char *cp, *env, *np; 2256 int len; 2257 2258 np = acpi_name(handle); 2259 if (*np == '\\') 2260 np++; 2261 if ((env = getenv("debug.acpi.avoid")) == NULL) 2262 return (0); 2263 2264 /* Scan the avoid list checking for a match */ 2265 cp = env; 2266 for (;;) { 2267 while (*cp != 0 && isspace(*cp)) 2268 cp++; 2269 if (*cp == 0) 2270 break; 2271 len = 0; 2272 while (cp[len] != 0 && !isspace(cp[len])) 2273 len++; 2274 if (!strncmp(cp, np, len)) { 2275 freeenv(env); 2276 return(1); 2277 } 2278 cp += len; 2279 } 2280 freeenv(env); 2281 2282 return (0); 2283} 2284 2285/* 2286 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2287 */ 2288int 2289acpi_disabled(char *subsys) 2290{ 2291 char *cp, *env; 2292 int len; 2293 2294 if ((env = getenv("debug.acpi.disabled")) == NULL) 2295 return (0); 2296 if (strcmp(env, "all") == 0) { 2297 freeenv(env); 2298 return (1); 2299 } 2300 2301 /* Scan the disable list, checking for a match. */ 2302 cp = env; 2303 for (;;) { 2304 while (*cp != '\0' && isspace(*cp)) 2305 cp++; 2306 if (*cp == '\0') 2307 break; 2308 len = 0; 2309 while (cp[len] != '\0' && !isspace(cp[len])) 2310 len++; 2311 if (strncmp(cp, subsys, len) == 0) { 2312 freeenv(env); 2313 return (1); 2314 } 2315 cp += len; 2316 } 2317 freeenv(env); 2318 2319 return (0); 2320} 2321 2322/* 2323 * Control interface. 2324 * 2325 * We multiplex ioctls for all participating ACPI devices here. Individual 2326 * drivers wanting to be accessible via /dev/acpi should use the 2327 * register/deregister interface to make their handlers visible. 2328 */ 2329struct acpi_ioctl_hook 2330{ 2331 TAILQ_ENTRY(acpi_ioctl_hook) link; 2332 u_long cmd; 2333 acpi_ioctl_fn fn; 2334 void *arg; 2335}; 2336 2337static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2338static int acpi_ioctl_hooks_initted; 2339 2340int 2341acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2342{ 2343 struct acpi_ioctl_hook *hp; 2344 2345 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2346 return (ENOMEM); 2347 hp->cmd = cmd; 2348 hp->fn = fn; 2349 hp->arg = arg; 2350 if (acpi_ioctl_hooks_initted == 0) { 2351 TAILQ_INIT(&acpi_ioctl_hooks); 2352 acpi_ioctl_hooks_initted = 1; 2353 } 2354 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2355 return (0); 2356} 2357 2358/* 2359 * Deregister an ioctl handler. 2360 */ 2361void 2362acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2363{ 2364 struct acpi_ioctl_hook *hp; 2365 2366 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2367 if ((hp->cmd == cmd) && (hp->fn == fn)) 2368 break; 2369 2370 if (hp != NULL) { 2371 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2372 free(hp, M_ACPIDEV); 2373 } 2374} 2375 2376static int 2377acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2378{ 2379 return (0); 2380} 2381 2382static int 2383acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2384{ 2385 return (0); 2386} 2387 2388static int 2389acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2390{ 2391 struct acpi_softc *sc; 2392 struct acpi_ioctl_hook *hp; 2393 int error, state; 2394 2395 error = 0; 2396 hp = NULL; 2397 sc = dev->si_drv1; 2398 2399 /* 2400 * Scan the list of registered ioctls, looking for handlers. 2401 */ 2402 if (acpi_ioctl_hooks_initted) 2403 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2404 if (hp->cmd == cmd) 2405 break; 2406 } 2407 if (hp) 2408 return (hp->fn(cmd, addr, hp->arg)); 2409 2410 /* 2411 * Core ioctls are not permitted for non-writable user. 2412 * Currently, other ioctls just fetch information. 2413 * Not changing system behavior. 2414 */ 2415 if ((flag & FWRITE) == 0) 2416 return (EPERM); 2417 2418 /* Core system ioctls. */ 2419 switch (cmd) { 2420 case ACPIIO_ENABLE: 2421 if (ACPI_FAILURE(acpi_Enable(sc))) 2422 error = ENXIO; 2423 break; 2424 case ACPIIO_DISABLE: 2425 if (ACPI_FAILURE(acpi_Disable(sc))) 2426 error = ENXIO; 2427 break; 2428 case ACPIIO_SETSLPSTATE: 2429 if (!sc->acpi_enabled) { 2430 error = ENXIO; 2431 break; 2432 } 2433 error = EINVAL; 2434 state = *(int *)addr; 2435 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2436 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 2437 error = 0; 2438 break; 2439 default: 2440 error = ENXIO; 2441 break; 2442 } 2443 2444 return (error); 2445} 2446 2447static int 2448acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2449{ 2450 int error; 2451 struct sbuf sb; 2452 UINT8 state, TypeA, TypeB; 2453 2454 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 2455 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 2456 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 2457 sbuf_printf(&sb, "S%d ", state); 2458 sbuf_trim(&sb); 2459 sbuf_finish(&sb); 2460 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 2461 sbuf_delete(&sb); 2462 return (error); 2463} 2464 2465static int 2466acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2467{ 2468 char sleep_state[10]; 2469 int error; 2470 u_int new_state, old_state; 2471 2472 old_state = *(u_int *)oidp->oid_arg1; 2473 if (old_state > ACPI_S_STATES_MAX + 1) 2474 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 2475 else 2476 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 2477 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2478 if (error == 0 && req->newptr != NULL) { 2479 new_state = ACPI_STATE_S0; 2480 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 2481 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 2482 break; 2483 if (new_state <= ACPI_S_STATES_MAX + 1) { 2484 if (new_state != old_state) 2485 *(u_int *)oidp->oid_arg1 = new_state; 2486 } else 2487 error = EINVAL; 2488 } 2489 2490 return (error); 2491} 2492 2493/* Inform devctl(4) when we receive a Notify. */ 2494void 2495acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 2496{ 2497 char notify_buf[16]; 2498 ACPI_BUFFER handle_buf; 2499 ACPI_STATUS status; 2500 2501 if (subsystem == NULL) 2502 return; 2503 2504 handle_buf.Pointer = NULL; 2505 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 2506 status = AcpiNsHandleToPathname(h, &handle_buf); 2507 if (ACPI_FAILURE(status)) 2508 return; 2509 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 2510 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 2511 AcpiOsFree(handle_buf.Pointer); 2512} 2513 2514#ifdef ACPI_DEBUG 2515/* 2516 * Support for parsing debug options from the kernel environment. 2517 * 2518 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2519 * by specifying the names of the bits in the debug.acpi.layer and 2520 * debug.acpi.level environment variables. Bits may be unset by 2521 * prefixing the bit name with !. 2522 */ 2523struct debugtag 2524{ 2525 char *name; 2526 UINT32 value; 2527}; 2528 2529static struct debugtag dbg_layer[] = { 2530 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2531 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2532 {"ACPI_EVENTS", ACPI_EVENTS}, 2533 {"ACPI_TABLES", ACPI_TABLES}, 2534 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2535 {"ACPI_PARSER", ACPI_PARSER}, 2536 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2537 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2538 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2539 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2540 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2541 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2542 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2543 2544 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2545 {"ACPI_BATTERY", ACPI_BATTERY}, 2546 {"ACPI_BUS", ACPI_BUS}, 2547 {"ACPI_BUTTON", ACPI_BUTTON}, 2548 {"ACPI_EC", ACPI_EC}, 2549 {"ACPI_FAN", ACPI_FAN}, 2550 {"ACPI_POWERRES", ACPI_POWERRES}, 2551 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2552 {"ACPI_THERMAL", ACPI_THERMAL}, 2553 {"ACPI_TIMER", ACPI_TIMER}, 2554 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2555 {NULL, 0} 2556}; 2557 2558static struct debugtag dbg_level[] = { 2559 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2560 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2561 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2562 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2563 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2564 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2565 2566 /* Trace verbosity level 1 [Standard Trace Level] */ 2567 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2568 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2569 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2570 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2571 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2572 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2573 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2574 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2575 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2576 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2577 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2578 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2579 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2580 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2581 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2582 2583 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2584 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2585 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2586 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2587 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2588 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2589 2590 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2591 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2592 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2593 {"ACPI_LV_IO", ACPI_LV_IO}, 2594 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2595 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2596 2597 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2598 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2599 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2600 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2601 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2602 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2603 {NULL, 0} 2604}; 2605 2606static void 2607acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2608{ 2609 char *ep; 2610 int i, l; 2611 int set; 2612 2613 while (*cp) { 2614 if (isspace(*cp)) { 2615 cp++; 2616 continue; 2617 } 2618 ep = cp; 2619 while (*ep && !isspace(*ep)) 2620 ep++; 2621 if (*cp == '!') { 2622 set = 0; 2623 cp++; 2624 if (cp == ep) 2625 continue; 2626 } else { 2627 set = 1; 2628 } 2629 l = ep - cp; 2630 for (i = 0; tag[i].name != NULL; i++) { 2631 if (!strncmp(cp, tag[i].name, l)) { 2632 if (set) 2633 *flag |= tag[i].value; 2634 else 2635 *flag &= ~tag[i].value; 2636 } 2637 } 2638 cp = ep; 2639 } 2640} 2641 2642static void 2643acpi_set_debugging(void *junk) 2644{ 2645 char *layer, *level; 2646 2647 if (cold) { 2648 AcpiDbgLayer = 0; 2649 AcpiDbgLevel = 0; 2650 } 2651 2652 layer = getenv("debug.acpi.layer"); 2653 level = getenv("debug.acpi.level"); 2654 if (layer == NULL && level == NULL) 2655 return; 2656 2657 printf("ACPI set debug"); 2658 if (layer != NULL) { 2659 if (strcmp("NONE", layer) != 0) 2660 printf(" layer '%s'", layer); 2661 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 2662 freeenv(layer); 2663 } 2664 if (level != NULL) { 2665 if (strcmp("NONE", level) != 0) 2666 printf(" level '%s'", level); 2667 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 2668 freeenv(level); 2669 } 2670 printf("\n"); 2671} 2672 2673SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 2674 NULL); 2675 2676static int 2677acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 2678{ 2679 int error, *dbg; 2680 struct debugtag *tag; 2681 struct sbuf sb; 2682 2683 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 2684 return (ENOMEM); 2685 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 2686 tag = &dbg_layer[0]; 2687 dbg = &AcpiDbgLayer; 2688 } else { 2689 tag = &dbg_level[0]; 2690 dbg = &AcpiDbgLevel; 2691 } 2692 2693 /* Get old values if this is a get request. */ 2694 if (*dbg == 0) { 2695 sbuf_cpy(&sb, "NONE"); 2696 } else if (req->newptr == NULL) { 2697 for (; tag->name != NULL; tag++) { 2698 if ((*dbg & tag->value) == tag->value) 2699 sbuf_printf(&sb, "%s ", tag->name); 2700 } 2701 } 2702 sbuf_trim(&sb); 2703 sbuf_finish(&sb); 2704 2705 /* Copy out the old values to the user. */ 2706 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 2707 sbuf_delete(&sb); 2708 2709 /* If the user is setting a string, parse it. */ 2710 if (error == 0 && req->newptr != NULL) { 2711 *dbg = 0; 2712 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 2713 acpi_set_debugging(NULL); 2714 } 2715 2716 return (error); 2717} 2718 2719SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 2720 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 2721SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 2722 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 2723#endif /* ACPI_DEBUG */ 2724 2725static int 2726acpi_pm_func(u_long cmd, void *arg, ...) 2727{ 2728 int state, acpi_state; 2729 int error; 2730 struct acpi_softc *sc; 2731 va_list ap; 2732 2733 error = 0; 2734 switch (cmd) { 2735 case POWER_CMD_SUSPEND: 2736 sc = (struct acpi_softc *)arg; 2737 if (sc == NULL) { 2738 error = EINVAL; 2739 goto out; 2740 } 2741 2742 va_start(ap, arg); 2743 state = va_arg(ap, int); 2744 va_end(ap); 2745 2746 switch (state) { 2747 case POWER_SLEEP_STATE_STANDBY: 2748 acpi_state = sc->acpi_standby_sx; 2749 break; 2750 case POWER_SLEEP_STATE_SUSPEND: 2751 acpi_state = sc->acpi_suspend_sx; 2752 break; 2753 case POWER_SLEEP_STATE_HIBERNATE: 2754 acpi_state = ACPI_STATE_S4; 2755 break; 2756 default: 2757 error = EINVAL; 2758 goto out; 2759 } 2760 2761 acpi_SetSleepState(sc, acpi_state); 2762 break; 2763 default: 2764 error = EINVAL; 2765 goto out; 2766 } 2767 2768out: 2769 return (error); 2770} 2771 2772static void 2773acpi_pm_register(void *arg) 2774{ 2775 if (!cold || resource_disabled("acpi", 0)) 2776 return; 2777 2778 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 2779} 2780 2781SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 2782