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