acpi.c revision 129783
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 129783 2004-05-27 18:38:45Z 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/bus.h> 39#include <sys/conf.h> 40#include <sys/ioccom.h> 41#include <sys/reboot.h> 42#include <sys/sysctl.h> 43#include <sys/ctype.h> 44#include <sys/linker.h> 45#include <sys/power.h> 46#include <sys/sbuf.h> 47#include <sys/smp.h> 48 49#include <machine/clock.h> 50#include <machine/resource.h> 51#include <machine/bus.h> 52#include <sys/rman.h> 53#include <isa/isavar.h> 54 55#include "acpi.h" 56#include <dev/acpica/acpivar.h> 57#include <dev/acpica/acpiio.h> 58#include <contrib/dev/acpica/acnamesp.h> 59 60MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 61 62/* Hooks for the ACPI CA debugging infrastructure */ 63#define _COMPONENT ACPI_BUS 64ACPI_MODULE_NAME("ACPI") 65 66static d_open_t acpiopen; 67static d_close_t acpiclose; 68static d_ioctl_t acpiioctl; 69 70static struct cdevsw acpi_cdevsw = { 71 .d_version = D_VERSION, 72 .d_flags = D_NEEDGIANT, 73 .d_open = acpiopen, 74 .d_close = acpiclose, 75 .d_ioctl = acpiioctl, 76 .d_name = "acpi", 77}; 78 79#if __FreeBSD_version >= 500000 80struct mtx acpi_mutex; 81#endif 82 83struct acpi_quirks { 84 char *OemId; 85 uint32_t OemRevision; 86 char *value; 87}; 88 89#define ACPI_OEM_REV_ANY 0 90 91static struct acpi_quirks acpi_quirks_table[] = { 92#ifdef notyet 93 /* Bad PCI routing table. Used on some SuperMicro boards. */ 94 { "PTLTD ", 0x06040000, "pci_link" }, 95#endif 96 97 { NULL, 0, NULL } 98}; 99 100static int acpi_modevent(struct module *mod, int event, void *junk); 101static void acpi_identify(driver_t *driver, device_t parent); 102static int acpi_probe(device_t dev); 103static int acpi_attach(device_t dev); 104static void acpi_quirks_set(void); 105static device_t acpi_add_child(device_t bus, int order, const char *name, 106 int unit); 107static int acpi_print_child(device_t bus, device_t child); 108static int acpi_read_ivar(device_t dev, device_t child, int index, 109 uintptr_t *result); 110static int acpi_write_ivar(device_t dev, device_t child, int index, 111 uintptr_t value); 112static int acpi_set_resource(device_t dev, device_t child, int type, 113 int rid, u_long start, u_long count); 114static int acpi_get_resource(device_t dev, device_t child, int type, 115 int rid, u_long *startp, u_long *countp); 116static struct resource *acpi_alloc_resource(device_t bus, device_t child, 117 int type, int *rid, u_long start, u_long end, 118 u_long count, u_int flags); 119static int acpi_release_resource(device_t bus, device_t child, int type, 120 int rid, struct resource *r); 121static uint32_t acpi_isa_get_logicalid(device_t dev); 122static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 123static int acpi_isa_pnp_probe(device_t bus, device_t child, 124 struct isa_pnp_id *ids); 125static void acpi_probe_children(device_t bus); 126static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 127 void *context, void **status); 128static void acpi_shutdown_pre_sync(void *arg, int howto); 129static void acpi_shutdown_final(void *arg, int howto); 130static void acpi_shutdown_poweroff(void *arg); 131static void acpi_enable_fixed_events(struct acpi_softc *sc); 132static int acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw); 133static ACPI_STATUS acpi_wake_limit(ACPI_HANDLE h, UINT32 level, void *context, 134 void **status); 135static int acpi_wake_limit_walk(int sstate); 136static void acpi_system_eventhandler_sleep(void *arg, int state); 137static void acpi_system_eventhandler_wakeup(void *arg, int state); 138static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 139static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 140static int acpi_pm_func(u_long cmd, void *arg, ...); 141static int acpi_child_location_str_method(device_t acdev, device_t child, 142 char *buf, size_t buflen); 143static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 144 char *buf, size_t buflen); 145 146static device_method_t acpi_methods[] = { 147 /* Device interface */ 148 DEVMETHOD(device_identify, acpi_identify), 149 DEVMETHOD(device_probe, acpi_probe), 150 DEVMETHOD(device_attach, acpi_attach), 151 DEVMETHOD(device_detach, bus_generic_detach), 152 DEVMETHOD(device_shutdown, bus_generic_shutdown), 153 DEVMETHOD(device_suspend, bus_generic_suspend), 154 DEVMETHOD(device_resume, bus_generic_resume), 155 156 /* Bus interface */ 157 DEVMETHOD(bus_add_child, acpi_add_child), 158 DEVMETHOD(bus_print_child, acpi_print_child), 159 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 160 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 161 DEVMETHOD(bus_set_resource, acpi_set_resource), 162 DEVMETHOD(bus_get_resource, acpi_get_resource), 163 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 164 DEVMETHOD(bus_release_resource, acpi_release_resource), 165 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 166 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 167 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 168 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 169 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 170 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 171 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 172 173 /* ISA emulation */ 174 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 175 176 {0, 0} 177}; 178 179static driver_t acpi_driver = { 180 "acpi", 181 acpi_methods, 182 sizeof(struct acpi_softc), 183}; 184 185static devclass_t acpi_devclass; 186DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 187MODULE_VERSION(acpi, 1); 188 189static const char* sleep_state_names[] = { 190 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 191 192SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, NULL, "ACPI debugging"); 193static char acpi_ca_version[12]; 194SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 195 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 196 197/* 198 * Allow override of whether methods execute in parallel or not. 199 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 200 * errors for AML that really can't handle parallel method execution. 201 * It is off by default since this breaks recursive methods and 202 * some IBMs use such code. 203 */ 204static int acpi_serialize_methods; 205TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 206 207/* 208 * ACPI can only be loaded as a module by the loader; activating it after 209 * system bootstrap time is not useful, and can be fatal to the system. 210 * It also cannot be unloaded, since the entire system bus heirarchy hangs 211 * off it. 212 */ 213static int 214acpi_modevent(struct module *mod, int event, void *junk) 215{ 216 switch(event) { 217 case MOD_LOAD: 218 if (!cold) { 219 printf("The ACPI driver cannot be loaded after boot.\n"); 220 return (EPERM); 221 } 222 break; 223 case MOD_UNLOAD: 224 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 225 return (EBUSY); 226 break; 227 default: 228 break; 229 } 230 return (0); 231} 232 233/* 234 * Perform early initialization. 235 */ 236ACPI_STATUS 237acpi_Startup(void) 238{ 239#ifdef ACPI_DEBUGGER 240 char *debugpoint; 241#endif 242 static int error, started = 0; 243 244 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 245 246 if (started) 247 return_VALUE (error); 248 started = 1; 249 250#if __FreeBSD_version >= 500000 251 /* Initialise the ACPI mutex */ 252 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 253#endif 254 255 /* 256 * Set the globals from our tunables. This is needed because ACPI-CA 257 * uses UINT8 for some values and we have no tunable_byte. 258 */ 259 AcpiGbl_AllMethodsSerialized = (UINT8)acpi_serialize_methods; 260 261 /* Start up the ACPI CA subsystem. */ 262#ifdef ACPI_DEBUGGER 263 debugpoint = getenv("debug.acpi.debugger"); 264 if (debugpoint) { 265 if (!strcmp(debugpoint, "init")) 266 acpi_EnterDebugger(); 267 freeenv(debugpoint); 268 } 269#endif 270 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 271 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 272 return_VALUE (error); 273 } 274#ifdef ACPI_DEBUGGER 275 debugpoint = getenv("debug.acpi.debugger"); 276 if (debugpoint) { 277 if (!strcmp(debugpoint, "tables")) 278 acpi_EnterDebugger(); 279 freeenv(debugpoint); 280 } 281#endif 282 283 if (ACPI_FAILURE(error = AcpiLoadTables())) { 284 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 285 return_VALUE(error); 286 } 287 288 /* Set up any quirks we have for this XSDT. */ 289 acpi_quirks_set(); 290 if (acpi_disabled("acpi")) 291 return_VALUE (AE_ERROR); 292 293 return_VALUE (AE_OK); 294} 295 296/* 297 * Detect ACPI, perform early initialisation 298 */ 299static void 300acpi_identify(driver_t *driver, device_t parent) 301{ 302 device_t child; 303 304 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 305 306 if (!cold) 307 return_VOID; 308 309 /* Check that we haven't been disabled with a hint. */ 310 if (resource_disabled("acpi", 0)) 311 return_VOID; 312 313 /* Make sure we're not being doubly invoked. */ 314 if (device_find_child(parent, "acpi", 0) != NULL) 315 return_VOID; 316 317 /* Initialize ACPI-CA. */ 318 if (ACPI_FAILURE(acpi_Startup())) 319 return_VOID; 320 321 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION); 322 323 /* Attach the actual ACPI device. */ 324 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 325 device_printf(parent, "ACPI: could not attach\n"); 326 return_VOID; 327 } 328} 329 330/* 331 * Fetch some descriptive data from ACPI to put in our attach message 332 */ 333static int 334acpi_probe(device_t dev) 335{ 336 ACPI_TABLE_HEADER th; 337 char buf[20]; 338 int error; 339 struct sbuf sb; 340 ACPI_STATUS status; 341 ACPI_LOCK_DECL; 342 343 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 344 345 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 346 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 347 348 device_printf(dev, "Other PM system enabled.\n"); 349 return_VALUE(ENXIO); 350 } 351 352 ACPI_LOCK; 353 354 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 355 device_printf(dev, "couldn't get XSDT header: %s\n", 356 AcpiFormatException(status)); 357 error = ENXIO; 358 } else { 359 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 360 sbuf_bcat(&sb, th.OemId, 6); 361 sbuf_trim(&sb); 362 sbuf_putc(&sb, ' '); 363 sbuf_bcat(&sb, th.OemTableId, 8); 364 sbuf_trim(&sb); 365 sbuf_finish(&sb); 366 device_set_desc_copy(dev, sbuf_data(&sb)); 367 sbuf_delete(&sb); 368 error = 0; 369 } 370 ACPI_UNLOCK; 371 return_VALUE(error); 372} 373 374static int 375acpi_attach(device_t dev) 376{ 377 struct acpi_softc *sc; 378 ACPI_STATUS status; 379 int error, state; 380 UINT32 flags; 381 UINT8 TypeA, TypeB; 382 char *env; 383#ifdef ACPI_DEBUGGER 384 char *debugpoint; 385#endif 386 ACPI_LOCK_DECL; 387 388 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 389 ACPI_LOCK; 390 sc = device_get_softc(dev); 391 bzero(sc, sizeof(*sc)); 392 sc->acpi_dev = dev; 393 394#ifdef ACPI_DEBUGGER 395 debugpoint = getenv("debug.acpi.debugger"); 396 if (debugpoint) { 397 if (!strcmp(debugpoint, "spaces")) 398 acpi_EnterDebugger(); 399 freeenv(debugpoint); 400 } 401#endif 402 403 /* Install the default address space handlers. */ 404 error = ENXIO; 405 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 406 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 407 if (ACPI_FAILURE(status)) { 408 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 409 AcpiFormatException(status)); 410 goto out; 411 } 412 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 413 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 414 if (ACPI_FAILURE(status)) { 415 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 416 AcpiFormatException(status)); 417 goto out; 418 } 419 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 420 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 421 if (ACPI_FAILURE(status)) { 422 device_printf(dev, "could not initialise PciConfig handler: %s\n", 423 AcpiFormatException(status)); 424 goto out; 425 } 426 427 /* 428 * Bring ACPI fully online. 429 * 430 * Note that some systems (specifically, those with namespace evaluation 431 * issues that require the avoidance of parts of the namespace) must 432 * avoid running _INI and _STA on everything, as well as dodging the final 433 * object init pass. 434 * 435 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 436 * 437 * XXX We should arrange for the object init pass after we have attached 438 * all our child devices, but on many systems it works here. 439 */ 440#ifdef ACPI_DEBUGGER 441 debugpoint = getenv("debug.acpi.debugger"); 442 if (debugpoint) { 443 if (!strcmp(debugpoint, "enable")) 444 acpi_EnterDebugger(); 445 freeenv(debugpoint); 446 } 447#endif 448 flags = 0; 449 if (testenv("debug.acpi.avoid")) 450 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 451 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 452 device_printf(dev, "Could not enable ACPI: %s\n", 453 AcpiFormatException(status)); 454 goto out; 455 } 456 457 /* 458 * Call the ECDT probe function to provide EC functionality before 459 * the namespace has been evaluated. 460 */ 461 acpi_ec_ecdt_probe(dev); 462 463 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 464 device_printf(dev, "Could not initialize ACPI objects: %s\n", 465 AcpiFormatException(status)); 466 goto out; 467 } 468 469 /* 470 * Setup our sysctl tree. 471 * 472 * XXX: This doesn't check to make sure that none of these fail. 473 */ 474 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 475 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 476 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 477 device_get_name(dev), CTLFLAG_RD, 0, ""); 478 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 479 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 480 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 481 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 482 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 483 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 484 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 485 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 486 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 487 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 488 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 489 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 490 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 491 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 492 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 493 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 494 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 495 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 496 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 497 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 498 &sc->acpi_sleep_delay, 0, "sleep delay"); 499 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 500 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 501 &sc->acpi_s4bios, 0, "S4BIOS mode"); 502 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 503 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 504 &sc->acpi_verbose, 0, "verbose mode"); 505 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 506 OID_AUTO, "disable_on_poweroff", CTLFLAG_RD | CTLFLAG_RW, 507 &sc->acpi_disable_on_poweroff, 0, "ACPI subsystem disable on poweroff"); 508 509 /* 510 * Default to 5 seconds before sleeping to give some machines time to 511 * stabilize. 512 */ 513 sc->acpi_sleep_delay = 5; 514 sc->acpi_disable_on_poweroff = 1; 515 if (bootverbose) 516 sc->acpi_verbose = 1; 517 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) { 518 sc->acpi_verbose = 1; 519 freeenv(env); 520 } 521 522 /* Only enable S4BIOS by default if the FACS says it is available. */ 523 if (AcpiGbl_FACS->S4Bios_f != 0) 524 sc->acpi_s4bios = 1; 525 526 /* 527 * Dispatch the default sleep state to devices. The lid switch is set 528 * to NONE by default to avoid surprising users. 529 */ 530 sc->acpi_power_button_sx = ACPI_STATE_S5; 531 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 532 sc->acpi_standby_sx = ACPI_STATE_S1; 533 sc->acpi_suspend_sx = ACPI_STATE_S3; 534 535 /* Pick the first valid sleep state for the sleep button default. */ 536 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 537 for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++) 538 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 539 sc->acpi_sleep_button_sx = state; 540 break; 541 } 542 543 acpi_enable_fixed_events(sc); 544 545 /* 546 * Scan the namespace and attach/initialise children. 547 */ 548#ifdef ACPI_DEBUGGER 549 debugpoint = getenv("debug.acpi.debugger"); 550 if (debugpoint) { 551 if (!strcmp(debugpoint, "probe")) 552 acpi_EnterDebugger(); 553 freeenv(debugpoint); 554 } 555#endif 556 557 /* Register our shutdown handlers */ 558 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, 559 SHUTDOWN_PRI_LAST); 560 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 561 SHUTDOWN_PRI_LAST); 562 563 /* 564 * Register our acpi event handlers. 565 * XXX should be configurable eg. via userland policy manager. 566 */ 567 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 568 sc, ACPI_EVENT_PRI_LAST); 569 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 570 sc, ACPI_EVENT_PRI_LAST); 571 572 /* Flag our initial states. */ 573 sc->acpi_enabled = 1; 574 sc->acpi_sstate = ACPI_STATE_S0; 575 sc->acpi_sleep_disabled = 0; 576 577 /* Create the control device */ 578 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 579 "acpi"); 580 sc->acpi_dev_t->si_drv1 = sc; 581 582#ifdef ACPI_DEBUGGER 583 debugpoint = getenv("debug.acpi.debugger"); 584 if (debugpoint) { 585 if (strcmp(debugpoint, "running") == 0) 586 acpi_EnterDebugger(); 587 freeenv(debugpoint); 588 } 589#endif 590 591#ifdef ACPI_USE_THREADS 592 if ((error = acpi_task_thread_init())) 593 goto out; 594#endif 595 596 if ((error = acpi_machdep_init(dev))) 597 goto out; 598 599 /* Register ACPI again to pass the correct argument of pm_func. */ 600 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 601 602 if (!acpi_disabled("bus")) 603 acpi_probe_children(dev); 604 605 error = 0; 606 607 out: 608 ACPI_UNLOCK; 609 return_VALUE (error); 610} 611 612static void 613acpi_quirks_set() 614{ 615 XSDT_DESCRIPTOR *xsdt; 616 struct acpi_quirks *quirk; 617 char *env, *tmp; 618 int len; 619 620 /* 621 * If the user loaded a custom table or disabled "quirks", leave 622 * the settings alone. 623 */ 624 len = 0; 625 if ((env = getenv("acpi_dsdt_load")) != NULL) { 626 /* XXX No strcasecmp but this is good enough. */ 627 if (*env == 'Y' || *env == 'y') 628 goto out; 629 freeenv(env); 630 } 631 if ((env = getenv("debug.acpi.disabled")) != NULL) { 632 if (strstr("quirks", env) != NULL) 633 goto out; 634 len = strlen(env); 635 } 636 637 /* 638 * Search through our quirk table and concatenate the disabled 639 * values with whatever we find. 640 */ 641 xsdt = AcpiGbl_XSDT; 642 for (quirk = acpi_quirks_table; quirk->OemId; quirk++) { 643 if (!strncmp(xsdt->OemId, quirk->OemId, strlen(quirk->OemId)) && 644 (xsdt->OemRevision == quirk->OemRevision || 645 quirk->OemRevision == ACPI_OEM_REV_ANY)) { 646 len += strlen(quirk->value) + 2; 647 if ((tmp = malloc(len, M_TEMP, M_NOWAIT)) == NULL) 648 goto out; 649 sprintf(tmp, "%s %s", env ? env : "", quirk->value); 650 setenv("debug.acpi.disabled", tmp); 651 free(tmp, M_TEMP); 652 break; 653 } 654 } 655 656out: 657 if (env) 658 freeenv(env); 659} 660 661/* 662 * Handle a new device being added 663 */ 664static device_t 665acpi_add_child(device_t bus, int order, const char *name, int unit) 666{ 667 struct acpi_device *ad; 668 device_t child; 669 670 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 671 return (NULL); 672 673 resource_list_init(&ad->ad_rl); 674 675 child = device_add_child_ordered(bus, order, name, unit); 676 if (child != NULL) 677 device_set_ivars(child, ad); 678 return (child); 679} 680 681static int 682acpi_print_child(device_t bus, device_t child) 683{ 684 struct acpi_device *adev = device_get_ivars(child); 685 struct resource_list *rl = &adev->ad_rl; 686 int retval = 0; 687 688 retval += bus_print_child_header(bus, child); 689 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 690 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 691 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 692 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 693 retval += bus_print_child_footer(bus, child); 694 695 return (retval); 696} 697 698/* Location hint for devctl(8) */ 699static int 700acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 701 size_t buflen) 702{ 703 struct acpi_device *dinfo = device_get_ivars(child); 704 705 if (dinfo->ad_handle) 706 snprintf(buf, buflen, "path=%s", acpi_name(dinfo->ad_handle)); 707 else 708 snprintf(buf, buflen, "magic=unknown"); 709 return (0); 710} 711 712/* PnP information for devctl(8) */ 713static int 714acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 715 size_t buflen) 716{ 717 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 718 ACPI_DEVICE_INFO *adinfo; 719 struct acpi_device *dinfo = device_get_ivars(child); 720 char *end; 721 int error; 722 723 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 724 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 725 726 if (error) 727 snprintf(buf, buflen, "Unknown"); 728 else 729 snprintf(buf, buflen, "_HID=%s _UID=%lu", 730 (adinfo->Valid & ACPI_VALID_HID) ? 731 adinfo->HardwareId.Value : "UNKNOWN", 732 (adinfo->Valid & ACPI_VALID_UID) ? 733 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 734 735 if (adinfo) 736 AcpiOsFree(adinfo); 737 738 return (0); 739} 740 741/* 742 * Handle per-device ivars 743 */ 744static int 745acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 746{ 747 struct acpi_device *ad; 748 749 if ((ad = device_get_ivars(child)) == NULL) { 750 printf("device has no ivars\n"); 751 return (ENOENT); 752 } 753 754 /* ACPI and ISA compatibility ivars */ 755 switch(index) { 756 case ACPI_IVAR_HANDLE: 757 *(ACPI_HANDLE *)result = ad->ad_handle; 758 break; 759 case ACPI_IVAR_MAGIC: 760 *(int *)result = ad->ad_magic; 761 break; 762 case ACPI_IVAR_PRIVATE: 763 *(void **)result = ad->ad_private; 764 break; 765 case ISA_IVAR_VENDORID: 766 case ISA_IVAR_SERIAL: 767 case ISA_IVAR_COMPATID: 768 *(int *)result = -1; 769 break; 770 case ISA_IVAR_LOGICALID: 771 *(int *)result = acpi_isa_get_logicalid(child); 772 break; 773 default: 774 return (ENOENT); 775 } 776 777 return (0); 778} 779 780static int 781acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 782{ 783 struct acpi_device *ad; 784 785 if ((ad = device_get_ivars(child)) == NULL) { 786 printf("device has no ivars\n"); 787 return (ENOENT); 788 } 789 790 switch(index) { 791 case ACPI_IVAR_HANDLE: 792 ad->ad_handle = (ACPI_HANDLE)value; 793 break; 794 case ACPI_IVAR_MAGIC: 795 ad->ad_magic = (int)value; 796 break; 797 case ACPI_IVAR_PRIVATE: 798 ad->ad_private = (void *)value; 799 break; 800 default: 801 panic("bad ivar write request (%d)", index); 802 return (ENOENT); 803 } 804 805 return (0); 806} 807 808/* 809 * Handle child resource allocation/removal 810 */ 811static int 812acpi_set_resource(device_t dev, device_t child, int type, int rid, 813 u_long start, u_long count) 814{ 815 struct acpi_device *ad = device_get_ivars(child); 816 struct resource_list *rl = &ad->ad_rl; 817 818 resource_list_add(rl, type, rid, start, start + count -1, count); 819 820 return(0); 821} 822 823static int 824acpi_get_resource(device_t dev, device_t child, int type, int rid, 825 u_long *startp, u_long *countp) 826{ 827 struct acpi_device *ad = device_get_ivars(child); 828 struct resource_list *rl = &ad->ad_rl; 829 struct resource_list_entry *rle; 830 831 rle = resource_list_find(rl, type, rid); 832 if (!rle) 833 return(ENOENT); 834 835 if (startp) 836 *startp = rle->start; 837 if (countp) 838 *countp = rle->count; 839 840 return (0); 841} 842 843static struct resource * 844acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 845 u_long start, u_long end, u_long count, u_int flags) 846{ 847 struct acpi_device *ad = device_get_ivars(child); 848 struct resource_list *rl = &ad->ad_rl; 849 850 return (resource_list_alloc(rl, bus, child, type, rid, start, end, count, 851 flags)); 852} 853 854static int 855acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 856{ 857 struct acpi_device *ad = device_get_ivars(child); 858 struct resource_list *rl = &ad->ad_rl; 859 860 return (resource_list_release(rl, bus, child, type, rid, r)); 861} 862 863/* Allocate an IO port or memory resource, given its GAS. */ 864struct resource * 865acpi_bus_alloc_gas(device_t dev, int *rid, ACPI_GENERIC_ADDRESS *gas) 866{ 867 int type; 868 869 if (gas == NULL || !ACPI_VALID_ADDRESS(gas->Address) || 870 gas->RegisterBitWidth < 8) 871 return (NULL); 872 873 switch (gas->AddressSpaceId) { 874 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 875 type = SYS_RES_MEMORY; 876 break; 877 case ACPI_ADR_SPACE_SYSTEM_IO: 878 type = SYS_RES_IOPORT; 879 break; 880 default: 881 return (NULL); 882 } 883 884 bus_set_resource(dev, type, *rid, gas->Address, gas->RegisterBitWidth / 8); 885 return (bus_alloc_resource_any(dev, type, rid, RF_ACTIVE)); 886} 887 888/* 889 * Handle ISA-like devices probing for a PnP ID to match. 890 */ 891#define PNP_EISAID(s) \ 892 ((((s[0] - '@') & 0x1f) << 2) \ 893 | (((s[1] - '@') & 0x18) >> 3) \ 894 | (((s[1] - '@') & 0x07) << 13) \ 895 | (((s[2] - '@') & 0x1f) << 8) \ 896 | (PNP_HEXTONUM(s[4]) << 16) \ 897 | (PNP_HEXTONUM(s[3]) << 20) \ 898 | (PNP_HEXTONUM(s[6]) << 24) \ 899 | (PNP_HEXTONUM(s[5]) << 28)) 900 901static uint32_t 902acpi_isa_get_logicalid(device_t dev) 903{ 904 ACPI_DEVICE_INFO *devinfo; 905 ACPI_BUFFER buf; 906 ACPI_HANDLE h; 907 ACPI_STATUS error; 908 u_int32_t pnpid; 909 ACPI_LOCK_DECL; 910 911 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 912 913 pnpid = 0; 914 buf.Pointer = NULL; 915 buf.Length = ACPI_ALLOCATE_BUFFER; 916 917 ACPI_LOCK; 918 919 /* Fetch and validate the HID. */ 920 if ((h = acpi_get_handle(dev)) == NULL) 921 goto out; 922 error = AcpiGetObjectInfo(h, &buf); 923 if (ACPI_FAILURE(error)) 924 goto out; 925 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 926 927 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 928 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 929 930out: 931 if (buf.Pointer != NULL) 932 AcpiOsFree(buf.Pointer); 933 ACPI_UNLOCK; 934 return_VALUE (pnpid); 935} 936 937static int 938acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 939{ 940 ACPI_DEVICE_INFO *devinfo; 941 ACPI_BUFFER buf; 942 ACPI_HANDLE h; 943 ACPI_STATUS error; 944 uint32_t *pnpid; 945 int valid, i; 946 ACPI_LOCK_DECL; 947 948 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 949 950 pnpid = cids; 951 valid = 0; 952 buf.Pointer = NULL; 953 buf.Length = ACPI_ALLOCATE_BUFFER; 954 955 ACPI_LOCK; 956 957 /* Fetch and validate the CID */ 958 if ((h = acpi_get_handle(dev)) == NULL) 959 goto out; 960 error = AcpiGetObjectInfo(h, &buf); 961 if (ACPI_FAILURE(error)) 962 goto out; 963 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 964 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 965 goto out; 966 967 if (devinfo->CompatibilityId.Count < count) 968 count = devinfo->CompatibilityId.Count; 969 for (i = 0; i < count; i++) { 970 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 971 continue; 972 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 973 valid++; 974 } 975 976out: 977 if (buf.Pointer != NULL) 978 AcpiOsFree(buf.Pointer); 979 ACPI_UNLOCK; 980 return_VALUE (valid); 981} 982 983static int 984acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 985{ 986 int result, cid_count, i; 987 uint32_t lid, cids[8]; 988 989 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 990 991 /* 992 * ISA-style drivers attached to ACPI may persist and 993 * probe manually if we return ENOENT. We never want 994 * that to happen, so don't ever return it. 995 */ 996 result = ENXIO; 997 998 /* Scan the supplied IDs for a match */ 999 lid = acpi_isa_get_logicalid(child); 1000 cid_count = acpi_isa_get_compatid(child, cids, 8); 1001 while (ids && ids->ip_id) { 1002 if (lid == ids->ip_id) { 1003 result = 0; 1004 goto out; 1005 } 1006 for (i = 0; i < cid_count; i++) { 1007 if (cids[i] == ids->ip_id) { 1008 result = 0; 1009 goto out; 1010 } 1011 } 1012 ids++; 1013 } 1014 1015 out: 1016 return_VALUE (result); 1017} 1018 1019/* 1020 * Scan relevant portions of the ACPI namespace and attach child devices. 1021 * 1022 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and 1023 * \_SB_ scopes, and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 1024 */ 1025static void 1026acpi_probe_children(device_t bus) 1027{ 1028 ACPI_HANDLE parent; 1029 ACPI_STATUS status; 1030 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 1031 int i; 1032 1033 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1034 ACPI_ASSERTLOCK; 1035 1036 /* Create any static children by calling device identify methods. */ 1037 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1038 bus_generic_probe(bus); 1039 1040 /* 1041 * Scan the namespace and insert placeholders for all the devices that 1042 * we find. 1043 * 1044 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1045 * we want to create nodes for all devices, not just those that are 1046 * currently present. (This assumes that we don't want to create/remove 1047 * devices as they appear, which might be smarter.) 1048 */ 1049 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1050 for (i = 0; scopes[i] != NULL; i++) { 1051 status = AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent); 1052 if (ACPI_SUCCESS(status)) { 1053 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, 1054 bus, NULL); 1055 } 1056 } 1057 1058 /* 1059 * Scan all of the child devices we have created and let them probe/attach. 1060 */ 1061 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1062 bus_generic_attach(bus); 1063 1064 /* 1065 * Some of these children may have attached others as part of their attach 1066 * process (eg. the root PCI bus driver), so rescan. 1067 */ 1068 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1069 bus_generic_attach(bus); 1070 1071 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1072 return_VOID; 1073} 1074 1075/* 1076 * Evaluate a child device and determine whether we might attach a device to 1077 * it. 1078 */ 1079static ACPI_STATUS 1080acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1081{ 1082 ACPI_OBJECT_TYPE type; 1083 device_t child, bus = (device_t)context; 1084 1085 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1086 1087 /* Skip this device if we think we'll have trouble with it. */ 1088 if (acpi_avoid(handle)) 1089 return_ACPI_STATUS (AE_OK); 1090 1091 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1092 switch(type) { 1093 case ACPI_TYPE_DEVICE: 1094 case ACPI_TYPE_PROCESSOR: 1095 case ACPI_TYPE_THERMAL: 1096 case ACPI_TYPE_POWER: 1097 if (acpi_disabled("children")) 1098 break; 1099 1100 /* 1101 * Create a placeholder device for this node. Sort the placeholder 1102 * so that the probe/attach passes will run breadth-first. 1103 */ 1104 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", 1105 acpi_name(handle))); 1106 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 1107 if (child == NULL) 1108 break; 1109 acpi_set_handle(child, handle); 1110 1111 /* Check if the device can generate wake events. */ 1112 if (ACPI_SUCCESS(AcpiEvaluateObject(handle, "_PRW", NULL, NULL))) 1113 device_set_flags(child, ACPI_FLAG_WAKE_CAPABLE); 1114 1115 /* 1116 * Check that the device is present. If it's not present, 1117 * leave it disabled (so that we have a device_t attached to 1118 * the handle, but we don't probe it). 1119 */ 1120 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1121 device_disable(child); 1122 break; 1123 } 1124 1125 /* 1126 * Get the device's resource settings and attach them. 1127 * Note that if the device has _PRS but no _CRS, we need 1128 * to decide when it's appropriate to try to configure the 1129 * device. Ignore the return value here; it's OK for the 1130 * device not to have any resources. 1131 */ 1132 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1133 1134 /* If we're debugging, probe/attach now rather than later */ 1135 ACPI_DEBUG_EXEC(device_probe_and_attach(child)); 1136 break; 1137 } 1138 } 1139 1140 return_ACPI_STATUS (AE_OK); 1141} 1142 1143static void 1144acpi_shutdown_pre_sync(void *arg, int howto) 1145{ 1146 struct acpi_softc *sc = arg; 1147 1148 ACPI_ASSERTLOCK; 1149 1150 /* Disable all wake GPEs not appropriate for this state. */ 1151 acpi_wake_limit_walk(ACPI_STATE_S5); 1152 1153 /* 1154 * Disable all ACPI events before soft off, otherwise the system 1155 * will be turned on again on some laptops. 1156 * 1157 * XXX this should probably be restricted to masking some events just 1158 * before powering down, since we may still need ACPI during the 1159 * shutdown process. 1160 */ 1161 if (sc->acpi_disable_on_poweroff) 1162 acpi_Disable(sc); 1163} 1164 1165static void 1166acpi_shutdown_final(void *arg, int howto) 1167{ 1168 ACPI_STATUS status; 1169 ACPI_ASSERTLOCK; 1170 1171 /* 1172 * If powering off, run the actual shutdown code on each processor. 1173 * It will only perform the shutdown on the BSP. Some chipsets do 1174 * not power off the system correctly if called from an AP. 1175 */ 1176 if ((howto & RB_POWEROFF) != 0) { 1177 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1178 if (ACPI_FAILURE(status)) { 1179 printf("AcpiEnterSleepStatePrep failed - %s\n", 1180 AcpiFormatException(status)); 1181 return; 1182 } 1183 printf("Powering system off using ACPI\n"); 1184 smp_rendezvous(NULL, acpi_shutdown_poweroff, NULL, NULL); 1185 } else { 1186 printf("Shutting down ACPI\n"); 1187 AcpiTerminate(); 1188 } 1189} 1190 1191/* 1192 * Since this function may be called with locks held or in an unknown 1193 * context, it cannot allocate memory, acquire locks, sleep, etc. 1194 */ 1195static void 1196acpi_shutdown_poweroff(void *arg) 1197{ 1198 ACPI_STATUS status; 1199 1200 ACPI_ASSERTLOCK; 1201 1202 /* Only attempt to power off if this is the BSP (cpuid 0). */ 1203 if (PCPU_GET(cpuid) != 0) 1204 return; 1205 1206 ACPI_DISABLE_IRQS(); 1207 status = AcpiEnterSleepState(ACPI_STATE_S5); 1208 if (ACPI_FAILURE(status)) { 1209 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1210 } else { 1211 DELAY(1000000); 1212 printf("ACPI power-off failed - timeout\n"); 1213 } 1214} 1215 1216static void 1217acpi_enable_fixed_events(struct acpi_softc *sc) 1218{ 1219 static int first_time = 1; 1220 1221 ACPI_ASSERTLOCK; 1222 1223 /* Enable and clear fixed events and install handlers. */ 1224 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 1225 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1226 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1227 acpi_event_power_button_sleep, sc); 1228 if (first_time) 1229 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1230 } 1231 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 1232 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1233 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1234 acpi_event_sleep_button_sleep, sc); 1235 if (first_time) 1236 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1237 } 1238 1239 first_time = 0; 1240} 1241 1242/* 1243 * Returns true if the device is actually present and should 1244 * be attached to. This requires the present, enabled, UI-visible 1245 * and diagnostics-passed bits to be set. 1246 */ 1247BOOLEAN 1248acpi_DeviceIsPresent(device_t dev) 1249{ 1250 ACPI_DEVICE_INFO *devinfo; 1251 ACPI_HANDLE h; 1252 ACPI_BUFFER buf; 1253 ACPI_STATUS error; 1254 int ret; 1255 1256 ACPI_ASSERTLOCK; 1257 1258 ret = FALSE; 1259 if ((h = acpi_get_handle(dev)) == NULL) 1260 return (FALSE); 1261 buf.Pointer = NULL; 1262 buf.Length = ACPI_ALLOCATE_BUFFER; 1263 error = AcpiGetObjectInfo(h, &buf); 1264 if (ACPI_FAILURE(error)) 1265 return (FALSE); 1266 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1267 1268 /* If no _STA method, must be present */ 1269 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1270 ret = TRUE; 1271 1272 /* Return true for 'present' and 'functioning' */ 1273 if ((devinfo->CurrentStatus & 0x9) == 0x9) 1274 ret = TRUE; 1275 1276 AcpiOsFree(buf.Pointer); 1277 return (ret); 1278} 1279 1280/* 1281 * Returns true if the battery is actually present and inserted. 1282 */ 1283BOOLEAN 1284acpi_BatteryIsPresent(device_t dev) 1285{ 1286 ACPI_DEVICE_INFO *devinfo; 1287 ACPI_HANDLE h; 1288 ACPI_BUFFER buf; 1289 ACPI_STATUS error; 1290 int ret; 1291 1292 ACPI_ASSERTLOCK; 1293 1294 ret = FALSE; 1295 if ((h = acpi_get_handle(dev)) == NULL) 1296 return (FALSE); 1297 buf.Pointer = NULL; 1298 buf.Length = ACPI_ALLOCATE_BUFFER; 1299 error = AcpiGetObjectInfo(h, &buf); 1300 if (ACPI_FAILURE(error)) 1301 return (FALSE); 1302 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1303 1304 /* If no _STA method, must be present */ 1305 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1306 ret = TRUE; 1307 1308 /* Return true for 'present' and 'functioning' */ 1309 if ((devinfo->CurrentStatus & 0x19) == 0x19) 1310 ret = TRUE; 1311 1312 AcpiOsFree(buf.Pointer); 1313 return (ret); 1314} 1315 1316/* 1317 * Match a HID string against a device 1318 */ 1319BOOLEAN 1320acpi_MatchHid(device_t dev, char *hid) 1321{ 1322 ACPI_DEVICE_INFO *devinfo; 1323 ACPI_HANDLE h; 1324 ACPI_BUFFER buf; 1325 ACPI_STATUS error; 1326 int ret, i; 1327 1328 ACPI_ASSERTLOCK; 1329 1330 ret = FALSE; 1331 if (hid == NULL) 1332 return (FALSE); 1333 if ((h = acpi_get_handle(dev)) == NULL) 1334 return (FALSE); 1335 buf.Pointer = NULL; 1336 buf.Length = ACPI_ALLOCATE_BUFFER; 1337 error = AcpiGetObjectInfo(h, &buf); 1338 if (ACPI_FAILURE(error)) 1339 return (FALSE); 1340 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1341 1342 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1343 strcmp(hid, devinfo->HardwareId.Value) == 0) 1344 ret = TRUE; 1345 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1346 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1347 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1348 ret = TRUE; 1349 break; 1350 } 1351 } 1352 } 1353 1354 AcpiOsFree(buf.Pointer); 1355 return (ret); 1356} 1357 1358/* 1359 * Return the handle of a named object within our scope, ie. that of (parent) 1360 * or one if its parents. 1361 */ 1362ACPI_STATUS 1363acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1364{ 1365 ACPI_HANDLE r; 1366 ACPI_STATUS status; 1367 1368 ACPI_ASSERTLOCK; 1369 1370 /* Walk back up the tree to the root */ 1371 for (;;) { 1372 status = AcpiGetHandle(parent, path, &r); 1373 if (ACPI_SUCCESS(status)) { 1374 *result = r; 1375 return (AE_OK); 1376 } 1377 if (status != AE_NOT_FOUND) 1378 return (AE_OK); 1379 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1380 return (AE_NOT_FOUND); 1381 parent = r; 1382 } 1383} 1384 1385/* Find the difference between two PM tick counts. */ 1386uint32_t 1387acpi_TimerDelta(uint32_t end, uint32_t start) 1388{ 1389 uint32_t delta; 1390 1391 if (end >= start) 1392 delta = end - start; 1393 else if (AcpiGbl_FADT->TmrValExt == 0) 1394 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 1395 else 1396 delta = ((0xFFFFFFFF - start) + end + 1); 1397 return (delta); 1398} 1399 1400/* 1401 * Allocate a buffer with a preset data size. 1402 */ 1403ACPI_BUFFER * 1404acpi_AllocBuffer(int size) 1405{ 1406 ACPI_BUFFER *buf; 1407 1408 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1409 return (NULL); 1410 buf->Length = size; 1411 buf->Pointer = (void *)(buf + 1); 1412 return (buf); 1413} 1414 1415ACPI_STATUS 1416acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1417{ 1418 ACPI_OBJECT arg1; 1419 ACPI_OBJECT_LIST args; 1420 1421 ACPI_ASSERTLOCK; 1422 1423 arg1.Type = ACPI_TYPE_INTEGER; 1424 arg1.Integer.Value = number; 1425 args.Count = 1; 1426 args.Pointer = &arg1; 1427 1428 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1429} 1430 1431/* 1432 * Evaluate a path that should return an integer. 1433 */ 1434ACPI_STATUS 1435acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1436{ 1437 ACPI_STATUS status; 1438 ACPI_BUFFER buf; 1439 ACPI_OBJECT param; 1440 1441 ACPI_ASSERTLOCK; 1442 1443 if (handle == NULL) 1444 handle = ACPI_ROOT_OBJECT; 1445 1446 /* 1447 * Assume that what we've been pointed at is an Integer object, or 1448 * a method that will return an Integer. 1449 */ 1450 buf.Pointer = ¶m; 1451 buf.Length = sizeof(param); 1452 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1453 if (ACPI_SUCCESS(status)) { 1454 if (param.Type == ACPI_TYPE_INTEGER) 1455 *number = param.Integer.Value; 1456 else 1457 status = AE_TYPE; 1458 } 1459 1460 /* 1461 * In some applications, a method that's expected to return an Integer 1462 * may instead return a Buffer (probably to simplify some internal 1463 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1464 * convert it into an Integer as best we can. 1465 * 1466 * This is a hack. 1467 */ 1468 if (status == AE_BUFFER_OVERFLOW) { 1469 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1470 status = AE_NO_MEMORY; 1471 } else { 1472 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1473 if (ACPI_SUCCESS(status)) 1474 status = acpi_ConvertBufferToInteger(&buf, number); 1475 AcpiOsFree(buf.Pointer); 1476 } 1477 } 1478 return (status); 1479} 1480 1481ACPI_STATUS 1482acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1483{ 1484 ACPI_OBJECT *p; 1485 UINT8 *val; 1486 int i; 1487 1488 p = (ACPI_OBJECT *)bufp->Pointer; 1489 if (p->Type == ACPI_TYPE_INTEGER) { 1490 *number = p->Integer.Value; 1491 return (AE_OK); 1492 } 1493 if (p->Type != ACPI_TYPE_BUFFER) 1494 return (AE_TYPE); 1495 if (p->Buffer.Length > sizeof(int)) 1496 return (AE_BAD_DATA); 1497 1498 *number = 0; 1499 val = p->Buffer.Pointer; 1500 for (i = 0; i < p->Buffer.Length; i++) 1501 *number += val[i] << (i * 8); 1502 return (AE_OK); 1503} 1504 1505/* 1506 * Iterate over the elements of an a package object, calling the supplied 1507 * function for each element. 1508 * 1509 * XXX possible enhancement might be to abort traversal on error. 1510 */ 1511ACPI_STATUS 1512acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1513 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1514{ 1515 ACPI_OBJECT *comp; 1516 int i; 1517 1518 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1519 return (AE_BAD_PARAMETER); 1520 1521 /* Iterate over components */ 1522 i = 0; 1523 comp = pkg->Package.Elements; 1524 for (; i < pkg->Package.Count; i++, comp++) 1525 func(comp, arg); 1526 1527 return (AE_OK); 1528} 1529 1530/* 1531 * Find the (index)th resource object in a set. 1532 */ 1533ACPI_STATUS 1534acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1535{ 1536 ACPI_RESOURCE *rp; 1537 int i; 1538 1539 rp = (ACPI_RESOURCE *)buf->Pointer; 1540 i = index; 1541 while (i-- > 0) { 1542 /* Range check */ 1543 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1544 return (AE_BAD_PARAMETER); 1545 1546 /* Check for terminator */ 1547 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1548 return (AE_NOT_FOUND); 1549 rp = ACPI_NEXT_RESOURCE(rp); 1550 } 1551 if (resp != NULL) 1552 *resp = rp; 1553 1554 return (AE_OK); 1555} 1556 1557/* 1558 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1559 * 1560 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1561 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1562 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1563 * resources. 1564 */ 1565#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1566 1567ACPI_STATUS 1568acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1569{ 1570 ACPI_RESOURCE *rp; 1571 void *newp; 1572 1573 /* Initialise the buffer if necessary. */ 1574 if (buf->Pointer == NULL) { 1575 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1576 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1577 return (AE_NO_MEMORY); 1578 rp = (ACPI_RESOURCE *)buf->Pointer; 1579 rp->Id = ACPI_RSTYPE_END_TAG; 1580 rp->Length = 0; 1581 } 1582 if (res == NULL) 1583 return (AE_OK); 1584 1585 /* 1586 * Scan the current buffer looking for the terminator. 1587 * This will either find the terminator or hit the end 1588 * of the buffer and return an error. 1589 */ 1590 rp = (ACPI_RESOURCE *)buf->Pointer; 1591 for (;;) { 1592 /* Range check, don't go outside the buffer */ 1593 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1594 return (AE_BAD_PARAMETER); 1595 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1596 break; 1597 rp = ACPI_NEXT_RESOURCE(rp); 1598 } 1599 1600 /* 1601 * Check the size of the buffer and expand if required. 1602 * 1603 * Required size is: 1604 * size of existing resources before terminator + 1605 * size of new resource and header + 1606 * size of terminator. 1607 * 1608 * Note that this loop should really only run once, unless 1609 * for some reason we are stuffing a *really* huge resource. 1610 */ 1611 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1612 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1613 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1614 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1615 return (AE_NO_MEMORY); 1616 bcopy(buf->Pointer, newp, buf->Length); 1617 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1618 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1619 AcpiOsFree(buf->Pointer); 1620 buf->Pointer = newp; 1621 buf->Length += buf->Length; 1622 } 1623 1624 /* Insert the new resource. */ 1625 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1626 1627 /* And add the terminator. */ 1628 rp = ACPI_NEXT_RESOURCE(rp); 1629 rp->Id = ACPI_RSTYPE_END_TAG; 1630 rp->Length = 0; 1631 1632 return (AE_OK); 1633} 1634 1635/* 1636 * Set interrupt model. 1637 */ 1638ACPI_STATUS 1639acpi_SetIntrModel(int model) 1640{ 1641 1642 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 1643} 1644 1645#define ACPI_MINIMUM_AWAKETIME 5 1646 1647static void 1648acpi_sleep_enable(void *arg) 1649{ 1650 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1651} 1652 1653/* 1654 * Set the system sleep state 1655 * 1656 * Currently we support S1-S5 but S4 is only S4BIOS 1657 */ 1658ACPI_STATUS 1659acpi_SetSleepState(struct acpi_softc *sc, int state) 1660{ 1661 ACPI_STATUS status = AE_OK; 1662 UINT8 TypeA; 1663 UINT8 TypeB; 1664 1665 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1666 ACPI_ASSERTLOCK; 1667 1668 /* Avoid reentry if already attempting to suspend. */ 1669 if (sc->acpi_sstate != ACPI_STATE_S0) 1670 return_ACPI_STATUS (AE_BAD_PARAMETER); 1671 1672 /* We recently woke up so don't suspend again for a while. */ 1673 if (sc->acpi_sleep_disabled) 1674 return_ACPI_STATUS (AE_OK); 1675 1676 switch (state) { 1677 case ACPI_STATE_S1: 1678 case ACPI_STATE_S2: 1679 case ACPI_STATE_S3: 1680 case ACPI_STATE_S4: 1681 status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB); 1682 if (status == AE_NOT_FOUND) { 1683 device_printf(sc->acpi_dev, 1684 "Sleep state S%d not supported by BIOS\n", state); 1685 break; 1686 } else if (ACPI_FAILURE(status)) { 1687 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 1688 AcpiFormatException(status)); 1689 break; 1690 } 1691 1692 sc->acpi_sstate = state; 1693 sc->acpi_sleep_disabled = 1; 1694 1695 /* Disable all wake GPEs not appropriate for this state. */ 1696 acpi_wake_limit_walk(state); 1697 1698 /* Inform all devices that we are going to sleep. */ 1699 if (DEVICE_SUSPEND(root_bus) != 0) { 1700 /* 1701 * Re-wake the system. 1702 * 1703 * XXX note that a better two-pass approach with a 'veto' pass 1704 * followed by a "real thing" pass would be better, but the 1705 * current bus interface does not provide for this. 1706 */ 1707 DEVICE_RESUME(root_bus); 1708 return_ACPI_STATUS (AE_ERROR); 1709 } 1710 1711 status = AcpiEnterSleepStatePrep(state); 1712 if (ACPI_FAILURE(status)) { 1713 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1714 AcpiFormatException(status)); 1715 break; 1716 } 1717 1718 if (sc->acpi_sleep_delay > 0) 1719 DELAY(sc->acpi_sleep_delay * 1000000); 1720 1721 if (state != ACPI_STATE_S1) { 1722 acpi_sleep_machdep(sc, state); 1723 1724 /* AcpiEnterSleepState() may be incomplete, unlock if locked. */ 1725 if (AcpiGbl_MutexInfo[ACPI_MTX_HARDWARE].OwnerId != 1726 ACPI_MUTEX_NOT_ACQUIRED) { 1727 1728 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1729 } 1730 1731 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1732 if (state == ACPI_STATE_S4) 1733 AcpiEnable(); 1734 } else { 1735 status = AcpiEnterSleepState((UINT8)state); 1736 if (ACPI_FAILURE(status)) { 1737 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 1738 AcpiFormatException(status)); 1739 break; 1740 } 1741 } 1742 AcpiLeaveSleepState((UINT8)state); 1743 DEVICE_RESUME(root_bus); 1744 sc->acpi_sstate = ACPI_STATE_S0; 1745 acpi_enable_fixed_events(sc); 1746 break; 1747 case ACPI_STATE_S5: 1748 /* 1749 * Shut down cleanly and power off. This will call us back through the 1750 * shutdown handlers. 1751 */ 1752 shutdown_nice(RB_POWEROFF); 1753 break; 1754 case ACPI_STATE_S0: 1755 default: 1756 status = AE_BAD_PARAMETER; 1757 break; 1758 } 1759 1760 /* Disable a second sleep request for a short period */ 1761 if (sc->acpi_sleep_disabled) 1762 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 1763 1764 return_ACPI_STATUS (status); 1765} 1766 1767/* Initialize a device's wake GPE. */ 1768int 1769acpi_wake_init(device_t dev, int type) 1770{ 1771 struct acpi_prw_data prw; 1772 1773 /* Check that the device can wake the system. */ 1774 if ((device_get_flags(dev) & ACPI_FLAG_WAKE_CAPABLE) == 0) 1775 return (ENXIO); 1776 1777 /* Evaluate _PRW to find the GPE. */ 1778 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 1779 return (ENXIO); 1780 1781 /* Set the requested type for the GPE (runtime, wake, or both). */ 1782 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 1783 device_printf(dev, "set GPE type failed\n"); 1784 return (ENXIO); 1785 } 1786 1787 return (0); 1788} 1789 1790/* Enable or disable the device's wake GPE. */ 1791int 1792acpi_wake_set_enable(device_t dev, int enable) 1793{ 1794 struct acpi_prw_data prw; 1795 ACPI_HANDLE handle; 1796 ACPI_STATUS status; 1797 int flags; 1798 1799 /* Make sure the device supports waking the system. */ 1800 flags = device_get_flags(dev); 1801 handle = acpi_get_handle(dev); 1802 if ((flags & ACPI_FLAG_WAKE_CAPABLE) == 0 || handle == NULL) 1803 return (ENXIO); 1804 1805 /* Evaluate _PRW to find the GPE. */ 1806 if (acpi_parse_prw(handle, &prw) != 0) 1807 return (ENXIO); 1808 1809 if (enable) { 1810 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 1811 if (ACPI_FAILURE(status)) { 1812 device_printf(dev, "enable wake failed\n"); 1813 return (ENXIO); 1814 } 1815 device_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 1816 } else { 1817 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 1818 if (ACPI_FAILURE(status)) { 1819 device_printf(dev, "disable wake failed\n"); 1820 return (ENXIO); 1821 } 1822 device_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 1823 } 1824 1825 return (0); 1826} 1827 1828/* Configure a device's GPE appropriately for the new sleep state. */ 1829int 1830acpi_wake_sleep_prep(device_t dev, int sstate) 1831{ 1832 struct acpi_prw_data prw; 1833 ACPI_HANDLE handle; 1834 1835 /* Check that this is an ACPI device and get its GPE. */ 1836 handle = acpi_get_handle(dev); 1837 if (handle == NULL) 1838 return (ENXIO); 1839 if (acpi_parse_prw(handle, &prw) != 0) 1840 return (ENXIO); 1841 1842 /* 1843 * The sleeping state being entered must be less than (i.e., higher power) 1844 * or equal to the value specified by _PRW. If not, disable this GPE. 1845 */ 1846 if (sstate > prw.lowest_wake) { 1847 if (bootverbose) 1848 device_printf(dev, "wake_prep disabled gpe %#x for state %d\n", 1849 prw.gpe_bit, sstate); 1850 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 1851 acpi_SetInteger(handle, "_PSW", 0); 1852 return (0); 1853 } 1854 1855 /* 1856 * If requested, enable the device's wake capability. 1857 * 1858 * TBD: All Power Resources referenced by elements 2 through N 1859 * of the _PRW object are put into the ON state. 1860 */ 1861 if ((device_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 1862 if (bootverbose) 1863 device_printf(dev, "wake_prep enabled _PSW for state %d\n", sstate); 1864 acpi_SetInteger(handle, "_PSW", 1); 1865 } 1866 1867 return (0); 1868} 1869 1870static ACPI_STATUS 1871acpi_wake_limit(ACPI_HANDLE h, UINT32 level, void *context, void **status) 1872{ 1873 struct acpi_prw_data prw; 1874 int sstate; 1875 1876 /* It's ok not to have _PRW if the device can't wake the system. */ 1877 if (acpi_parse_prw(h, &prw) != 0) 1878 return (AE_OK); 1879 1880 sstate = (int)context; 1881 if (sstate > prw.lowest_wake) 1882 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 1883 1884 return (AE_OK); 1885} 1886 1887/* Walk all system devices, disabling them if necessary for sstate. */ 1888static int 1889acpi_wake_limit_walk(int sstate) 1890{ 1891 ACPI_HANDLE sb_handle; 1892 1893 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 1894 AcpiWalkNamespace(ACPI_TYPE_ANY, sb_handle, 100, 1895 acpi_wake_limit, (void *)sstate, NULL); 1896 return (0); 1897} 1898 1899/* Parse a device's _PRW into a structure. */ 1900static int 1901acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 1902{ 1903 ACPI_STATUS status; 1904 ACPI_BUFFER prw_buffer; 1905 ACPI_OBJECT *res, *res2; 1906 int error; 1907 1908 if (h == NULL || prw == NULL) 1909 return (EINVAL); 1910 1911 /* 1912 * The _PRW object (7.2.9) is only required for devices that have the 1913 * ability to wake the system from a sleeping state. 1914 */ 1915 error = EINVAL; 1916 prw_buffer.Pointer = NULL; 1917 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 1918 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 1919 if (ACPI_FAILURE(status)) 1920 return (ENOENT); 1921 res = (ACPI_OBJECT *)prw_buffer.Pointer; 1922 if (res == NULL) 1923 return (ENOENT); 1924 if (!ACPI_PKG_VALID(res, 2)) 1925 goto out; 1926 1927 /* 1928 * Element 1 of the _PRW object: 1929 * The lowest power system sleeping state that can be entered while still 1930 * providing wake functionality. The sleeping state being entered must 1931 * be less than (i.e., higher power) or equal to this value. 1932 */ 1933 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 1934 goto out; 1935 1936 /* 1937 * Element 0 of the _PRW object: 1938 */ 1939 switch (res->Package.Elements[0].Type) { 1940 case ACPI_TYPE_INTEGER: 1941 /* 1942 * If the data type of this package element is numeric, then this 1943 * _PRW package element is the bit index in the GPEx_EN, in the 1944 * GPE blocks described in the FADT, of the enable bit that is 1945 * enabled for the wake event. 1946 */ 1947 prw->gpe_handle = NULL; 1948 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 1949 error = 0; 1950 break; 1951 case ACPI_TYPE_PACKAGE: 1952 /* 1953 * If the data type of this package element is a package, then this 1954 * _PRW package element is itself a package containing two 1955 * elements. The first is an object reference to the GPE Block 1956 * device that contains the GPE that will be triggered by the wake 1957 * event. The second element is numeric and it contains the bit 1958 * index in the GPEx_EN, in the GPE Block referenced by the 1959 * first element in the package, of the enable bit that is enabled for 1960 * the wake event. 1961 * 1962 * For example, if this field is a package then it is of the form: 1963 * Package() {\_SB.PCI0.ISA.GPE, 2} 1964 */ 1965 res2 = &res->Package.Elements[0]; 1966 if (!ACPI_PKG_VALID(res2, 2)) 1967 goto out; 1968 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 1969 if (prw->gpe_handle == NULL) 1970 goto out; 1971 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 1972 goto out; 1973 error = 0; 1974 break; 1975 default: 1976 goto out; 1977 } 1978 1979 /* XXX No power resource handling yet. */ 1980 prw->power_res = NULL; 1981 1982out: 1983 if (prw_buffer.Pointer != NULL) 1984 AcpiOsFree(prw_buffer.Pointer); 1985 return (error); 1986} 1987 1988/* 1989 * Enable/Disable ACPI 1990 */ 1991ACPI_STATUS 1992acpi_Enable(struct acpi_softc *sc) 1993{ 1994 ACPI_STATUS status; 1995 u_int32_t flags; 1996 1997 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1998 ACPI_ASSERTLOCK; 1999 2000 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 2001 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 2002 if (!sc->acpi_enabled) 2003 status = AcpiEnableSubsystem(flags); 2004 else 2005 status = AE_OK; 2006 2007 if (status == AE_OK) 2008 sc->acpi_enabled = 1; 2009 2010 return_ACPI_STATUS (status); 2011} 2012 2013ACPI_STATUS 2014acpi_Disable(struct acpi_softc *sc) 2015{ 2016 ACPI_STATUS status; 2017 2018 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2019 ACPI_ASSERTLOCK; 2020 2021 if (sc->acpi_enabled) 2022 status = AcpiDisable(); 2023 else 2024 status = AE_OK; 2025 2026 if (status == AE_OK) 2027 sc->acpi_enabled = 0; 2028 2029 return_ACPI_STATUS (status); 2030} 2031 2032/* 2033 * ACPI Event Handlers 2034 */ 2035 2036/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2037 2038static void 2039acpi_system_eventhandler_sleep(void *arg, int state) 2040{ 2041 ACPI_LOCK_DECL; 2042 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2043 2044 ACPI_LOCK; 2045 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2046 acpi_SetSleepState((struct acpi_softc *)arg, state); 2047 ACPI_UNLOCK; 2048 return_VOID; 2049} 2050 2051static void 2052acpi_system_eventhandler_wakeup(void *arg, int state) 2053{ 2054 ACPI_LOCK_DECL; 2055 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2056 2057 /* Well, what to do? :-) */ 2058 2059 ACPI_LOCK; 2060 ACPI_UNLOCK; 2061 2062 return_VOID; 2063} 2064 2065/* 2066 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2067 */ 2068UINT32 2069acpi_event_power_button_sleep(void *context) 2070{ 2071 struct acpi_softc *sc = (struct acpi_softc *)context; 2072 2073 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2074 2075 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2076 2077 return_VALUE (ACPI_INTERRUPT_HANDLED); 2078} 2079 2080UINT32 2081acpi_event_power_button_wake(void *context) 2082{ 2083 struct acpi_softc *sc = (struct acpi_softc *)context; 2084 2085 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2086 2087 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2088 2089 return_VALUE (ACPI_INTERRUPT_HANDLED); 2090} 2091 2092UINT32 2093acpi_event_sleep_button_sleep(void *context) 2094{ 2095 struct acpi_softc *sc = (struct acpi_softc *)context; 2096 2097 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2098 2099 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2100 2101 return_VALUE (ACPI_INTERRUPT_HANDLED); 2102} 2103 2104UINT32 2105acpi_event_sleep_button_wake(void *context) 2106{ 2107 struct acpi_softc *sc = (struct acpi_softc *)context; 2108 2109 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2110 2111 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2112 2113 return_VALUE (ACPI_INTERRUPT_HANDLED); 2114} 2115 2116/* 2117 * XXX This is kinda ugly, and should not be here. 2118 */ 2119struct acpi_staticbuf { 2120 ACPI_BUFFER buffer; 2121 char data[512]; 2122}; 2123 2124char * 2125acpi_name(ACPI_HANDLE handle) 2126{ 2127 static struct acpi_staticbuf buf; 2128 2129 ACPI_ASSERTLOCK; 2130 2131 buf.buffer.Length = 512; 2132 buf.buffer.Pointer = &buf.data[0]; 2133 2134 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer))) 2135 return (buf.buffer.Pointer); 2136 2137 return ("(unknown path)"); 2138} 2139 2140/* 2141 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2142 * parts of the namespace. 2143 */ 2144int 2145acpi_avoid(ACPI_HANDLE handle) 2146{ 2147 char *cp, *env, *np; 2148 int len; 2149 2150 np = acpi_name(handle); 2151 if (*np == '\\') 2152 np++; 2153 if ((env = getenv("debug.acpi.avoid")) == NULL) 2154 return (0); 2155 2156 /* Scan the avoid list checking for a match */ 2157 cp = env; 2158 for (;;) { 2159 while ((*cp != 0) && isspace(*cp)) 2160 cp++; 2161 if (*cp == 0) 2162 break; 2163 len = 0; 2164 while ((cp[len] != 0) && !isspace(cp[len])) 2165 len++; 2166 if (!strncmp(cp, np, len)) { 2167 freeenv(env); 2168 return(1); 2169 } 2170 cp += len; 2171 } 2172 freeenv(env); 2173 2174 return (0); 2175} 2176 2177/* 2178 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2179 */ 2180int 2181acpi_disabled(char *subsys) 2182{ 2183 char *cp, *env; 2184 int len; 2185 2186 if ((env = getenv("debug.acpi.disabled")) == NULL) 2187 return (0); 2188 if (strcmp(env, "all") == 0) { 2189 freeenv(env); 2190 return (1); 2191 } 2192 2193 /* Scan the disable list, checking for a match. */ 2194 cp = env; 2195 for (;;) { 2196 while (*cp != '\0' && isspace(*cp)) 2197 cp++; 2198 if (*cp == '\0') 2199 break; 2200 len = 0; 2201 while (cp[len] != '\0' && !isspace(cp[len])) 2202 len++; 2203 if (strncmp(cp, subsys, len) == 0) { 2204 freeenv(env); 2205 return (1); 2206 } 2207 cp += len; 2208 } 2209 freeenv(env); 2210 2211 return (0); 2212} 2213 2214/* 2215 * Control interface. 2216 * 2217 * We multiplex ioctls for all participating ACPI devices here. Individual 2218 * drivers wanting to be accessible via /dev/acpi should use the 2219 * register/deregister interface to make their handlers visible. 2220 */ 2221struct acpi_ioctl_hook 2222{ 2223 TAILQ_ENTRY(acpi_ioctl_hook) link; 2224 u_long cmd; 2225 acpi_ioctl_fn fn; 2226 void *arg; 2227}; 2228 2229static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2230static int acpi_ioctl_hooks_initted; 2231 2232/* 2233 * Register an ioctl handler. 2234 */ 2235int 2236acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2237{ 2238 struct acpi_ioctl_hook *hp; 2239 2240 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2241 return (ENOMEM); 2242 hp->cmd = cmd; 2243 hp->fn = fn; 2244 hp->arg = arg; 2245 if (acpi_ioctl_hooks_initted == 0) { 2246 TAILQ_INIT(&acpi_ioctl_hooks); 2247 acpi_ioctl_hooks_initted = 1; 2248 } 2249 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2250 return (0); 2251} 2252 2253/* 2254 * Deregister an ioctl handler. 2255 */ 2256void 2257acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2258{ 2259 struct acpi_ioctl_hook *hp; 2260 2261 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2262 if ((hp->cmd == cmd) && (hp->fn == fn)) 2263 break; 2264 2265 if (hp != NULL) { 2266 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2267 free(hp, M_ACPIDEV); 2268 } 2269} 2270 2271static int 2272acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td) 2273{ 2274 return (0); 2275} 2276 2277static int 2278acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td) 2279{ 2280 return (0); 2281} 2282 2283static int 2284acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2285{ 2286 struct acpi_softc *sc; 2287 struct acpi_ioctl_hook *hp; 2288 int error, xerror, state; 2289 ACPI_LOCK_DECL; 2290 2291 ACPI_LOCK; 2292 2293 error = state = 0; 2294 sc = dev->si_drv1; 2295 2296 /* 2297 * Scan the list of registered ioctls, looking for handlers. 2298 */ 2299 if (acpi_ioctl_hooks_initted) { 2300 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2301 if (hp->cmd == cmd) { 2302 xerror = hp->fn(cmd, addr, hp->arg); 2303 if (xerror != 0) 2304 error = xerror; 2305 goto out; 2306 } 2307 } 2308 } 2309 2310 /* 2311 * Core ioctls are not permitted for non-writable user. 2312 * Currently, other ioctls just fetch information. 2313 * Not changing system behavior. 2314 */ 2315 if((flag & FWRITE) == 0) 2316 return (EPERM); 2317 2318 /* Core system ioctls. */ 2319 switch (cmd) { 2320 case ACPIIO_ENABLE: 2321 if (ACPI_FAILURE(acpi_Enable(sc))) 2322 error = ENXIO; 2323 break; 2324 case ACPIIO_DISABLE: 2325 if (ACPI_FAILURE(acpi_Disable(sc))) 2326 error = ENXIO; 2327 break; 2328 case ACPIIO_SETSLPSTATE: 2329 if (!sc->acpi_enabled) { 2330 error = ENXIO; 2331 break; 2332 } 2333 state = *(int *)addr; 2334 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 2335 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 2336 error = EINVAL; 2337 } else { 2338 error = EINVAL; 2339 } 2340 break; 2341 default: 2342 if (error == 0) 2343 error = EINVAL; 2344 break; 2345 } 2346 2347out: 2348 ACPI_UNLOCK; 2349 return (error); 2350} 2351 2352static int 2353acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2354{ 2355 char sleep_state[4]; 2356 char buf[16]; 2357 int error; 2358 UINT8 state, TypeA, TypeB; 2359 2360 buf[0] = '\0'; 2361 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) { 2362 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 2363 sprintf(sleep_state, "S%d ", state); 2364 strcat(buf, sleep_state); 2365 } 2366 } 2367 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 2368 return (error); 2369} 2370 2371static int 2372acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2373{ 2374 char sleep_state[10]; 2375 int error; 2376 u_int new_state, old_state; 2377 2378 old_state = *(u_int *)oidp->oid_arg1; 2379 if (old_state > ACPI_S_STATES_MAX + 1) { 2380 strcpy(sleep_state, "unknown"); 2381 } else { 2382 bzero(sleep_state, sizeof(sleep_state)); 2383 strncpy(sleep_state, sleep_state_names[old_state], 2384 sizeof(sleep_state_names[old_state])); 2385 } 2386 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2387 if (error == 0 && req->newptr != NULL) { 2388 new_state = ACPI_STATE_S0; 2389 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) { 2390 if (strncmp(sleep_state, sleep_state_names[new_state], 2391 sizeof(sleep_state)) == 0) 2392 break; 2393 } 2394 if (new_state <= ACPI_S_STATES_MAX + 1) { 2395 if (new_state != old_state) 2396 *(u_int *)oidp->oid_arg1 = new_state; 2397 } else { 2398 error = EINVAL; 2399 } 2400 } 2401 2402 return (error); 2403} 2404 2405/* Inform devctl(4) when we receive a Notify. */ 2406void 2407acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 2408{ 2409 char notify_buf[16]; 2410 ACPI_BUFFER handle_buf; 2411 ACPI_STATUS status; 2412 2413 if (subsystem == NULL) 2414 return; 2415 2416 handle_buf.Pointer = NULL; 2417 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 2418 status = AcpiNsHandleToPathname(h, &handle_buf); 2419 if (ACPI_FAILURE(status)) 2420 return; 2421 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 2422 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 2423 AcpiOsFree(handle_buf.Pointer); 2424} 2425 2426#ifdef ACPI_DEBUG 2427/* 2428 * Support for parsing debug options from the kernel environment. 2429 * 2430 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2431 * by specifying the names of the bits in the debug.acpi.layer and 2432 * debug.acpi.level environment variables. Bits may be unset by 2433 * prefixing the bit name with !. 2434 */ 2435struct debugtag 2436{ 2437 char *name; 2438 UINT32 value; 2439}; 2440 2441static struct debugtag dbg_layer[] = { 2442 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2443 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2444 {"ACPI_EVENTS", ACPI_EVENTS}, 2445 {"ACPI_TABLES", ACPI_TABLES}, 2446 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2447 {"ACPI_PARSER", ACPI_PARSER}, 2448 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2449 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2450 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2451 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2452 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2453 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2454 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2455 2456 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2457 {"ACPI_BATTERY", ACPI_BATTERY}, 2458 {"ACPI_BUS", ACPI_BUS}, 2459 {"ACPI_BUTTON", ACPI_BUTTON}, 2460 {"ACPI_EC", ACPI_EC}, 2461 {"ACPI_FAN", ACPI_FAN}, 2462 {"ACPI_POWERRES", ACPI_POWERRES}, 2463 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2464 {"ACPI_THERMAL", ACPI_THERMAL}, 2465 {"ACPI_TIMER", ACPI_TIMER}, 2466 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2467 {NULL, 0} 2468}; 2469 2470static struct debugtag dbg_level[] = { 2471 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2472 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2473 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2474 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2475 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2476 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2477 2478 /* Trace verbosity level 1 [Standard Trace Level] */ 2479 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2480 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2481 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2482 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2483 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2484 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2485 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2486 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2487 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2488 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2489 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2490 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2491 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2492 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2493 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2494 2495 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2496 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2497 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2498 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2499 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2500 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2501 2502 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2503 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2504 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2505 {"ACPI_LV_IO", ACPI_LV_IO}, 2506 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2507 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2508 2509 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2510 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2511 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2512 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2513 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2514 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2515 {NULL, 0} 2516}; 2517 2518static void 2519acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2520{ 2521 char *ep; 2522 int i, l; 2523 int set; 2524 2525 while (*cp) { 2526 if (isspace(*cp)) { 2527 cp++; 2528 continue; 2529 } 2530 ep = cp; 2531 while (*ep && !isspace(*ep)) 2532 ep++; 2533 if (*cp == '!') { 2534 set = 0; 2535 cp++; 2536 if (cp == ep) 2537 continue; 2538 } else { 2539 set = 1; 2540 } 2541 l = ep - cp; 2542 for (i = 0; tag[i].name != NULL; i++) { 2543 if (!strncmp(cp, tag[i].name, l)) { 2544 if (set) 2545 *flag |= tag[i].value; 2546 else 2547 *flag &= ~tag[i].value; 2548 } 2549 } 2550 cp = ep; 2551 } 2552} 2553 2554static void 2555acpi_set_debugging(void *junk) 2556{ 2557 char *layer, *level; 2558 2559 if (cold) { 2560 AcpiDbgLayer = 0; 2561 AcpiDbgLevel = 0; 2562 } 2563 2564 layer = getenv("debug.acpi.layer"); 2565 level = getenv("debug.acpi.level"); 2566 if (layer == NULL && level == NULL) 2567 return; 2568 2569 printf("ACPI set debug"); 2570 if (layer != NULL) { 2571 if (strcmp("NONE", layer) != 0) 2572 printf(" layer '%s'", layer); 2573 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 2574 freeenv(layer); 2575 } 2576 if (level != NULL) { 2577 if (strcmp("NONE", level) != 0) 2578 printf(" level '%s'", level); 2579 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 2580 freeenv(level); 2581 } 2582 printf("\n"); 2583} 2584SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 2585 NULL); 2586 2587static int 2588acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 2589{ 2590 int error, *dbg; 2591 struct debugtag *tag; 2592 struct sbuf sb; 2593 2594 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 2595 return (ENOMEM); 2596 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 2597 tag = &dbg_layer[0]; 2598 dbg = &AcpiDbgLayer; 2599 } else { 2600 tag = &dbg_level[0]; 2601 dbg = &AcpiDbgLevel; 2602 } 2603 2604 /* Get old values if this is a get request. */ 2605 if (*dbg == 0) { 2606 sbuf_cpy(&sb, "NONE"); 2607 } else if (req->newptr == NULL) { 2608 for (; tag->name != NULL; tag++) { 2609 if ((*dbg & tag->value) == tag->value) 2610 sbuf_printf(&sb, "%s ", tag->name); 2611 } 2612 } 2613 sbuf_trim(&sb); 2614 sbuf_finish(&sb); 2615 2616 /* Copy out the old values to the user. */ 2617 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 2618 sbuf_delete(&sb); 2619 2620 /* If the user is setting a string, parse it. */ 2621 if (error == 0 && req->newptr != NULL) { 2622 *dbg = 0; 2623 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 2624 acpi_set_debugging(NULL); 2625 } 2626 2627 return (error); 2628} 2629SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 2630 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 2631SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 2632 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 2633#endif 2634 2635static int 2636acpi_pm_func(u_long cmd, void *arg, ...) 2637{ 2638 int state, acpi_state; 2639 int error; 2640 struct acpi_softc *sc; 2641 va_list ap; 2642 2643 error = 0; 2644 switch (cmd) { 2645 case POWER_CMD_SUSPEND: 2646 sc = (struct acpi_softc *)arg; 2647 if (sc == NULL) { 2648 error = EINVAL; 2649 goto out; 2650 } 2651 2652 va_start(ap, arg); 2653 state = va_arg(ap, int); 2654 va_end(ap); 2655 2656 switch (state) { 2657 case POWER_SLEEP_STATE_STANDBY: 2658 acpi_state = sc->acpi_standby_sx; 2659 break; 2660 case POWER_SLEEP_STATE_SUSPEND: 2661 acpi_state = sc->acpi_suspend_sx; 2662 break; 2663 case POWER_SLEEP_STATE_HIBERNATE: 2664 acpi_state = ACPI_STATE_S4; 2665 break; 2666 default: 2667 error = EINVAL; 2668 goto out; 2669 } 2670 2671 acpi_SetSleepState(sc, acpi_state); 2672 break; 2673 default: 2674 error = EINVAL; 2675 goto out; 2676 } 2677 2678out: 2679 return (error); 2680} 2681 2682static void 2683acpi_pm_register(void *arg) 2684{ 2685 if (!cold || resource_disabled("acpi", 0)) 2686 return; 2687 2688 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 2689} 2690 2691SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 2692