acpi.c revision 130451
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 130451 2004-06-14 04:37:45Z 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/module.h> 39#include <sys/bus.h> 40#include <sys/conf.h> 41#include <sys/ioccom.h> 42#include <sys/reboot.h> 43#include <sys/sysctl.h> 44#include <sys/ctype.h> 45#include <sys/linker.h> 46#include <sys/power.h> 47#include <sys/sbuf.h> 48#include <sys/smp.h> 49 50#include <machine/clock.h> 51#include <machine/resource.h> 52#include <machine/bus.h> 53#include <sys/rman.h> 54#include <isa/isavar.h> 55 56#include "acpi.h" 57#include <dev/acpica/acpivar.h> 58#include <dev/acpica/acpiio.h> 59#include <contrib/dev/acpica/acnamesp.h> 60 61MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 62 63/* Hooks for the ACPI CA debugging infrastructure */ 64#define _COMPONENT ACPI_BUS 65ACPI_MODULE_NAME("ACPI") 66 67static d_open_t acpiopen; 68static d_close_t acpiclose; 69static d_ioctl_t acpiioctl; 70 71static struct cdevsw acpi_cdevsw = { 72 .d_version = D_VERSION, 73 .d_flags = D_NEEDGIANT, 74 .d_open = acpiopen, 75 .d_close = acpiclose, 76 .d_ioctl = acpiioctl, 77 .d_name = "acpi", 78}; 79 80#if __FreeBSD_version >= 500000 81struct mtx acpi_mutex; 82#endif 83 84/* Local pools for managing system resources for ACPI child devices. */ 85struct rman acpi_rman_io, acpi_rman_mem; 86 87struct acpi_quirks { 88 char *OemId; 89 uint32_t OemRevision; 90 char *value; 91}; 92 93#define ACPI_OEM_REV_ANY 0 94 95static struct acpi_quirks acpi_quirks_table[] = { 96#ifdef notyet 97 /* Bad PCI routing table. Used on some SuperMicro boards. */ 98 { "PTLTD ", 0x06040000, "pci_link" }, 99#endif 100 101 { NULL, 0, NULL } 102}; 103 104static int acpi_modevent(struct module *mod, int event, void *junk); 105static void acpi_identify(driver_t *driver, device_t parent); 106static int acpi_probe(device_t dev); 107static int acpi_attach(device_t dev); 108static int acpi_shutdown(device_t dev); 109static void acpi_quirks_set(void); 110static device_t acpi_add_child(device_t bus, int order, const char *name, 111 int unit); 112static int acpi_print_child(device_t bus, device_t child); 113static int acpi_read_ivar(device_t dev, device_t child, int index, 114 uintptr_t *result); 115static int acpi_write_ivar(device_t dev, device_t child, int index, 116 uintptr_t value); 117static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 118static struct resource *acpi_alloc_resource(device_t bus, device_t child, 119 int type, int *rid, u_long start, u_long end, 120 u_long count, u_int flags); 121static int acpi_release_resource(device_t bus, device_t child, int type, 122 int rid, struct resource *r); 123static uint32_t acpi_isa_get_logicalid(device_t dev); 124static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 125static int acpi_isa_pnp_probe(device_t bus, device_t child, 126 struct isa_pnp_id *ids); 127static void acpi_probe_children(device_t bus); 128static int acpi_probe_order(ACPI_HANDLE handle, int *order); 129static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 130 void *context, void **status); 131static void acpi_shutdown_final(void *arg, int howto); 132static void acpi_shutdown_poweroff(void *arg); 133static void acpi_enable_fixed_events(struct acpi_softc *sc); 134static int acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw); 135static ACPI_STATUS acpi_wake_limit(ACPI_HANDLE h, UINT32 level, void *context, 136 void **status); 137static int acpi_wake_limit_walk(int sstate); 138static int acpi_wake_sysctl_walk(device_t dev); 139static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 140static void acpi_system_eventhandler_sleep(void *arg, int state); 141static void acpi_system_eventhandler_wakeup(void *arg, int state); 142static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 143static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 144static int acpi_pm_func(u_long cmd, void *arg, ...); 145static int acpi_child_location_str_method(device_t acdev, device_t child, 146 char *buf, size_t buflen); 147static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 148 char *buf, size_t buflen); 149 150static device_method_t acpi_methods[] = { 151 /* Device interface */ 152 DEVMETHOD(device_identify, acpi_identify), 153 DEVMETHOD(device_probe, acpi_probe), 154 DEVMETHOD(device_attach, acpi_attach), 155 DEVMETHOD(device_shutdown, acpi_shutdown), 156 DEVMETHOD(device_detach, bus_generic_detach), 157 DEVMETHOD(device_suspend, bus_generic_suspend), 158 DEVMETHOD(device_resume, bus_generic_resume), 159 160 /* Bus interface */ 161 DEVMETHOD(bus_add_child, acpi_add_child), 162 DEVMETHOD(bus_print_child, acpi_print_child), 163 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 164 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 165 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 166 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 167 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 168 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 169 DEVMETHOD(bus_release_resource, acpi_release_resource), 170 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 171 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 172 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 173 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 174 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 175 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 176 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 177 178 /* ISA emulation */ 179 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 180 181 {0, 0} 182}; 183 184static driver_t acpi_driver = { 185 "acpi", 186 acpi_methods, 187 sizeof(struct acpi_softc), 188}; 189 190static devclass_t acpi_devclass; 191DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 192MODULE_VERSION(acpi, 1); 193 194static const char* sleep_state_names[] = { 195 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 196 197SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, NULL, "ACPI debugging"); 198static char acpi_ca_version[12]; 199SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 200 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 201 202/* 203 * Allow override of whether methods execute in parallel or not. 204 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 205 * errors for AML that really can't handle parallel method execution. 206 * It is off by default since this breaks recursive methods and 207 * some IBMs use such code. 208 */ 209static int acpi_serialize_methods; 210TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 211 212/* 213 * ACPI can only be loaded as a module by the loader; activating it after 214 * system bootstrap time is not useful, and can be fatal to the system. 215 * It also cannot be unloaded, since the entire system bus heirarchy hangs 216 * off it. 217 */ 218static int 219acpi_modevent(struct module *mod, int event, void *junk) 220{ 221 switch(event) { 222 case MOD_LOAD: 223 if (!cold) { 224 printf("The ACPI driver cannot be loaded after boot.\n"); 225 return (EPERM); 226 } 227 break; 228 case MOD_UNLOAD: 229 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 230 return (EBUSY); 231 break; 232 default: 233 break; 234 } 235 return (0); 236} 237 238/* 239 * Perform early initialization. 240 */ 241ACPI_STATUS 242acpi_Startup(void) 243{ 244#ifdef ACPI_DEBUGGER 245 char *debugpoint; 246#endif 247 static int error, started = 0; 248 249 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 250 251 if (started) 252 return_VALUE (error); 253 started = 1; 254 255#if __FreeBSD_version >= 500000 256 /* Initialise the ACPI mutex */ 257 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 258#endif 259 260 /* 261 * Set the globals from our tunables. This is needed because ACPI-CA 262 * uses UINT8 for some values and we have no tunable_byte. 263 */ 264 AcpiGbl_AllMethodsSerialized = (UINT8)acpi_serialize_methods; 265 266 /* Start up the ACPI CA subsystem. */ 267#ifdef ACPI_DEBUGGER 268 debugpoint = getenv("debug.acpi.debugger"); 269 if (debugpoint) { 270 if (!strcmp(debugpoint, "init")) 271 acpi_EnterDebugger(); 272 freeenv(debugpoint); 273 } 274#endif 275 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 276 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 277 return_VALUE (error); 278 } 279#ifdef ACPI_DEBUGGER 280 debugpoint = getenv("debug.acpi.debugger"); 281 if (debugpoint) { 282 if (!strcmp(debugpoint, "tables")) 283 acpi_EnterDebugger(); 284 freeenv(debugpoint); 285 } 286#endif 287 288 if (ACPI_FAILURE(error = AcpiLoadTables())) { 289 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 290 return_VALUE(error); 291 } 292 293 /* Set up any quirks we have for this XSDT. */ 294 acpi_quirks_set(); 295 if (acpi_disabled("acpi")) 296 return_VALUE (AE_ERROR); 297 298 return_VALUE (AE_OK); 299} 300 301/* 302 * Detect ACPI, perform early initialisation 303 */ 304static void 305acpi_identify(driver_t *driver, device_t parent) 306{ 307 device_t child; 308 309 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 310 311 if (!cold) 312 return_VOID; 313 314 /* Check that we haven't been disabled with a hint. */ 315 if (resource_disabled("acpi", 0)) 316 return_VOID; 317 318 /* Make sure we're not being doubly invoked. */ 319 if (device_find_child(parent, "acpi", 0) != NULL) 320 return_VOID; 321 322 /* Initialize ACPI-CA. */ 323 if (ACPI_FAILURE(acpi_Startup())) 324 return_VOID; 325 326 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION); 327 328 /* Attach the actual ACPI device. */ 329 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 330 device_printf(parent, "ACPI: could not attach\n"); 331 return_VOID; 332 } 333} 334 335/* 336 * Fetch some descriptive data from ACPI to put in our attach message 337 */ 338static int 339acpi_probe(device_t dev) 340{ 341 ACPI_TABLE_HEADER th; 342 char buf[20]; 343 int error; 344 struct sbuf sb; 345 ACPI_STATUS status; 346 ACPI_LOCK_DECL; 347 348 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 349 350 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 351 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 352 353 device_printf(dev, "Other PM system enabled.\n"); 354 return_VALUE(ENXIO); 355 } 356 357 ACPI_LOCK; 358 359 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 360 device_printf(dev, "couldn't get XSDT header: %s\n", 361 AcpiFormatException(status)); 362 error = ENXIO; 363 } else { 364 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 365 sbuf_bcat(&sb, th.OemId, 6); 366 sbuf_trim(&sb); 367 sbuf_putc(&sb, ' '); 368 sbuf_bcat(&sb, th.OemTableId, 8); 369 sbuf_trim(&sb); 370 sbuf_finish(&sb); 371 device_set_desc_copy(dev, sbuf_data(&sb)); 372 sbuf_delete(&sb); 373 error = 0; 374 } 375 ACPI_UNLOCK; 376 return_VALUE(error); 377} 378 379static int 380acpi_attach(device_t dev) 381{ 382 struct acpi_softc *sc; 383 ACPI_STATUS status; 384 int error, state; 385 UINT32 flags; 386 UINT8 TypeA, TypeB; 387 char *env; 388#ifdef ACPI_DEBUGGER 389 char *debugpoint; 390#endif 391 ACPI_LOCK_DECL; 392 393 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 394 ACPI_LOCK; 395 sc = device_get_softc(dev); 396 bzero(sc, sizeof(*sc)); 397 sc->acpi_dev = dev; 398 399 /* Initialize resource manager. */ 400 acpi_rman_io.rm_type = RMAN_ARRAY; 401 acpi_rman_io.rm_start = 0; 402 acpi_rman_io.rm_end = 0xffff; 403 acpi_rman_io.rm_descr = "I/O ports"; 404 if (rman_init(&acpi_rman_io) != 0) 405 panic("acpi rman_init IO ports failed"); 406 acpi_rman_mem.rm_type = RMAN_ARRAY; 407 acpi_rman_mem.rm_start = 0; 408 acpi_rman_mem.rm_end = ~0ul; 409 acpi_rman_mem.rm_descr = "I/O memory addresses"; 410 if (rman_init(&acpi_rman_mem) != 0) 411 panic("acpi rman_init memory failed"); 412 413#ifdef ACPI_DEBUGGER 414 debugpoint = getenv("debug.acpi.debugger"); 415 if (debugpoint) { 416 if (!strcmp(debugpoint, "spaces")) 417 acpi_EnterDebugger(); 418 freeenv(debugpoint); 419 } 420#endif 421 422 /* Install the default address space handlers. */ 423 error = ENXIO; 424 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 425 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 426 if (ACPI_FAILURE(status)) { 427 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 428 AcpiFormatException(status)); 429 goto out; 430 } 431 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 432 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 433 if (ACPI_FAILURE(status)) { 434 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 435 AcpiFormatException(status)); 436 goto out; 437 } 438 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 439 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 440 if (ACPI_FAILURE(status)) { 441 device_printf(dev, "could not initialise PciConfig handler: %s\n", 442 AcpiFormatException(status)); 443 goto out; 444 } 445 446 /* 447 * Bring ACPI fully online. 448 * 449 * Note that some systems (specifically, those with namespace evaluation 450 * issues that require the avoidance of parts of the namespace) must 451 * avoid running _INI and _STA on everything, as well as dodging the final 452 * object init pass. 453 * 454 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 455 * 456 * XXX We should arrange for the object init pass after we have attached 457 * all our child devices, but on many systems it works here. 458 */ 459#ifdef ACPI_DEBUGGER 460 debugpoint = getenv("debug.acpi.debugger"); 461 if (debugpoint) { 462 if (!strcmp(debugpoint, "enable")) 463 acpi_EnterDebugger(); 464 freeenv(debugpoint); 465 } 466#endif 467 flags = 0; 468 if (testenv("debug.acpi.avoid")) 469 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 470 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 471 device_printf(dev, "Could not enable ACPI: %s\n", 472 AcpiFormatException(status)); 473 goto out; 474 } 475 476 /* 477 * Call the ECDT probe function to provide EC functionality before 478 * the namespace has been evaluated. 479 */ 480 acpi_ec_ecdt_probe(dev); 481 482 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 483 device_printf(dev, "Could not initialize ACPI objects: %s\n", 484 AcpiFormatException(status)); 485 goto out; 486 } 487 488 /* 489 * Setup our sysctl tree. 490 * 491 * XXX: This doesn't check to make sure that none of these fail. 492 */ 493 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 494 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 495 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 496 device_get_name(dev), CTLFLAG_RD, 0, ""); 497 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 498 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 499 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 500 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 501 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 502 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 503 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 504 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 505 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 506 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 507 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 508 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 509 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 510 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 511 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 512 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 513 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 514 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 515 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 516 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 517 &sc->acpi_sleep_delay, 0, "sleep delay"); 518 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 519 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 520 &sc->acpi_s4bios, 0, "S4BIOS mode"); 521 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 522 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 523 &sc->acpi_verbose, 0, "verbose mode"); 524 525 /* 526 * Default to 1 second before sleeping to give some machines time to 527 * stabilize. 528 */ 529 sc->acpi_sleep_delay = 1; 530 if (bootverbose) 531 sc->acpi_verbose = 1; 532 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) { 533 sc->acpi_verbose = 1; 534 freeenv(env); 535 } 536 537 /* Only enable S4BIOS by default if the FACS says it is available. */ 538 if (AcpiGbl_FACS->S4Bios_f != 0) 539 sc->acpi_s4bios = 1; 540 541 /* 542 * Dispatch the default sleep state to devices. The lid switch is set 543 * to NONE by default to avoid surprising users. 544 */ 545 sc->acpi_power_button_sx = ACPI_STATE_S5; 546 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 547 sc->acpi_standby_sx = ACPI_STATE_S1; 548 sc->acpi_suspend_sx = ACPI_STATE_S3; 549 550 /* Pick the first valid sleep state for the sleep button default. */ 551 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 552 for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++) 553 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 554 sc->acpi_sleep_button_sx = state; 555 break; 556 } 557 558 acpi_enable_fixed_events(sc); 559 560 /* 561 * Scan the namespace and attach/initialise children. 562 */ 563#ifdef ACPI_DEBUGGER 564 debugpoint = getenv("debug.acpi.debugger"); 565 if (debugpoint) { 566 if (!strcmp(debugpoint, "probe")) 567 acpi_EnterDebugger(); 568 freeenv(debugpoint); 569 } 570#endif 571 572 /* Register our shutdown handler. */ 573 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 574 SHUTDOWN_PRI_LAST); 575 576 /* 577 * Register our acpi event handlers. 578 * XXX should be configurable eg. via userland policy manager. 579 */ 580 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 581 sc, ACPI_EVENT_PRI_LAST); 582 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 583 sc, ACPI_EVENT_PRI_LAST); 584 585 /* Flag our initial states. */ 586 sc->acpi_enabled = 1; 587 sc->acpi_sstate = ACPI_STATE_S0; 588 sc->acpi_sleep_disabled = 0; 589 590 /* Create the control device */ 591 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 592 "acpi"); 593 sc->acpi_dev_t->si_drv1 = sc; 594 595#ifdef ACPI_DEBUGGER 596 debugpoint = getenv("debug.acpi.debugger"); 597 if (debugpoint) { 598 if (strcmp(debugpoint, "running") == 0) 599 acpi_EnterDebugger(); 600 freeenv(debugpoint); 601 } 602#endif 603 604#ifdef ACPI_USE_THREADS 605 if ((error = acpi_task_thread_init())) 606 goto out; 607#endif 608 609 if ((error = acpi_machdep_init(dev))) 610 goto out; 611 612 /* Register ACPI again to pass the correct argument of pm_func. */ 613 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 614 615 if (!acpi_disabled("bus")) 616 acpi_probe_children(dev); 617 618 error = 0; 619 620 out: 621 ACPI_UNLOCK; 622 return_VALUE (error); 623} 624 625static int 626acpi_shutdown(device_t dev) 627{ 628 629 /* Allow children to shutdown first. */ 630 bus_generic_shutdown(dev); 631 632 /* Disable all wake GPEs not appropriate for reboot/poweroff. */ 633 acpi_wake_limit_walk(ACPI_STATE_S5); 634 return (0); 635} 636 637static void 638acpi_quirks_set() 639{ 640 XSDT_DESCRIPTOR *xsdt; 641 struct acpi_quirks *quirk; 642 char *env, *tmp; 643 int len; 644 645 /* 646 * If the user loaded a custom table or disabled "quirks", leave 647 * the settings alone. 648 */ 649 len = 0; 650 if ((env = getenv("acpi_dsdt_load")) != NULL) { 651 /* XXX No strcasecmp but this is good enough. */ 652 if (*env == 'Y' || *env == 'y') 653 goto out; 654 freeenv(env); 655 } 656 if ((env = getenv("debug.acpi.disabled")) != NULL) { 657 if (strstr("quirks", env) != NULL) 658 goto out; 659 len = strlen(env); 660 } 661 662 /* 663 * Search through our quirk table and concatenate the disabled 664 * values with whatever we find. 665 */ 666 xsdt = AcpiGbl_XSDT; 667 for (quirk = acpi_quirks_table; quirk->OemId; quirk++) { 668 if (!strncmp(xsdt->OemId, quirk->OemId, strlen(quirk->OemId)) && 669 (xsdt->OemRevision == quirk->OemRevision || 670 quirk->OemRevision == ACPI_OEM_REV_ANY)) { 671 len += strlen(quirk->value) + 2; 672 if ((tmp = malloc(len, M_TEMP, M_NOWAIT)) == NULL) 673 goto out; 674 sprintf(tmp, "%s %s", env ? env : "", quirk->value); 675 setenv("debug.acpi.disabled", tmp); 676 free(tmp, M_TEMP); 677 break; 678 } 679 } 680 681out: 682 if (env) 683 freeenv(env); 684} 685 686/* 687 * Handle a new device being added 688 */ 689static device_t 690acpi_add_child(device_t bus, int order, const char *name, int unit) 691{ 692 struct acpi_device *ad; 693 device_t child; 694 695 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 696 return (NULL); 697 698 resource_list_init(&ad->ad_rl); 699 700 child = device_add_child_ordered(bus, order, name, unit); 701 if (child != NULL) 702 device_set_ivars(child, ad); 703 return (child); 704} 705 706static int 707acpi_print_child(device_t bus, device_t child) 708{ 709 struct acpi_device *adev = device_get_ivars(child); 710 struct resource_list *rl = &adev->ad_rl; 711 int retval = 0; 712 713 retval += bus_print_child_header(bus, child); 714 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 715 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 716 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 717 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 718 retval += bus_print_child_footer(bus, child); 719 720 return (retval); 721} 722 723/* Location hint for devctl(8) */ 724static int 725acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 726 size_t buflen) 727{ 728 struct acpi_device *dinfo = device_get_ivars(child); 729 730 if (dinfo->ad_handle) 731 snprintf(buf, buflen, "path=%s", acpi_name(dinfo->ad_handle)); 732 else 733 snprintf(buf, buflen, "magic=unknown"); 734 return (0); 735} 736 737/* PnP information for devctl(8) */ 738static int 739acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 740 size_t buflen) 741{ 742 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 743 ACPI_DEVICE_INFO *adinfo; 744 struct acpi_device *dinfo = device_get_ivars(child); 745 char *end; 746 int error; 747 748 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 749 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 750 751 if (error) 752 snprintf(buf, buflen, "Unknown"); 753 else 754 snprintf(buf, buflen, "_HID=%s _UID=%lu", 755 (adinfo->Valid & ACPI_VALID_HID) ? 756 adinfo->HardwareId.Value : "UNKNOWN", 757 (adinfo->Valid & ACPI_VALID_UID) ? 758 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 759 760 if (adinfo) 761 AcpiOsFree(adinfo); 762 763 return (0); 764} 765 766/* 767 * Handle per-device ivars 768 */ 769static int 770acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 771{ 772 struct acpi_device *ad; 773 774 if ((ad = device_get_ivars(child)) == NULL) { 775 printf("device has no ivars\n"); 776 return (ENOENT); 777 } 778 779 /* ACPI and ISA compatibility ivars */ 780 switch(index) { 781 case ACPI_IVAR_HANDLE: 782 *(ACPI_HANDLE *)result = ad->ad_handle; 783 break; 784 case ACPI_IVAR_MAGIC: 785 *(int *)result = ad->ad_magic; 786 break; 787 case ACPI_IVAR_PRIVATE: 788 *(void **)result = ad->ad_private; 789 break; 790 case ISA_IVAR_VENDORID: 791 case ISA_IVAR_SERIAL: 792 case ISA_IVAR_COMPATID: 793 *(int *)result = -1; 794 break; 795 case ISA_IVAR_LOGICALID: 796 *(int *)result = acpi_isa_get_logicalid(child); 797 break; 798 default: 799 return (ENOENT); 800 } 801 802 return (0); 803} 804 805static int 806acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 807{ 808 struct acpi_device *ad; 809 810 if ((ad = device_get_ivars(child)) == NULL) { 811 printf("device has no ivars\n"); 812 return (ENOENT); 813 } 814 815 switch(index) { 816 case ACPI_IVAR_HANDLE: 817 ad->ad_handle = (ACPI_HANDLE)value; 818 break; 819 case ACPI_IVAR_MAGIC: 820 ad->ad_magic = (int)value; 821 break; 822 case ACPI_IVAR_PRIVATE: 823 ad->ad_private = (void *)value; 824 break; 825 default: 826 panic("bad ivar write request (%d)", index); 827 return (ENOENT); 828 } 829 830 return (0); 831} 832 833/* 834 * Handle child resource allocation/removal 835 */ 836static struct resource_list * 837acpi_get_rlist(device_t dev, device_t child) 838{ 839 struct acpi_device *ad; 840 841 ad = device_get_ivars(child); 842 return (&ad->ad_rl); 843} 844 845static struct resource * 846acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 847 u_long start, u_long end, u_long count, u_int flags) 848{ 849 struct acpi_device *ad = device_get_ivars(child); 850 struct resource_list *rl = &ad->ad_rl; 851 struct resource_list_entry *rle; 852 struct resource *res; 853 struct rman *rm; 854 int needactivate; 855 856 /* 857 * If this is an allocation of the "default" range for a given RID, and 858 * we know what the resources for this device are (i.e., they're on the 859 * child's resource list), use those start/end values. 860 */ 861 if (start == 0UL && end == ~0UL) { 862 rle = resource_list_find(rl, type, *rid); 863 if (rle == NULL) 864 return (NULL); 865 start = rle->start; 866 end = rle->end; 867 count = rle->count; 868 } 869 870 /* If we don't manage this address, pass the request up to the parent. */ 871 rle = acpi_sysres_find(type, start); 872 if (rle == NULL) { 873 return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 874 start, end, count, flags)); 875 } 876 877 /* We only handle memory and IO resources through rman. */ 878 switch (type) { 879 case SYS_RES_IOPORT: 880 rm = &acpi_rman_io; 881 break; 882 case SYS_RES_MEMORY: 883 rm = &acpi_rman_mem; 884 break; 885 default: 886 panic("acpi_alloc_resource: invalid res type %d", type); 887 } 888 889 /* If we do know it, allocate it from the local pool. */ 890 needactivate = flags & RF_ACTIVE; 891 flags &= ~RF_ACTIVE; 892 res = rman_reserve_resource(rm, start, end, count, flags, child); 893 if (res == NULL) 894 return (NULL); 895 896 /* Copy the bus tag from the pre-allocated resource. */ 897 rman_set_bustag(res, rman_get_bustag(rle->res)); 898 if (type == SYS_RES_IOPORT) 899 rman_set_bushandle(res, res->r_start); 900 901 /* If requested, activate the resource using the parent's method. */ 902 if (needactivate) 903 if (bus_activate_resource(child, type, *rid, res) != 0) { 904 rman_release_resource(res); 905 return (NULL); 906 } 907 908 return (res); 909} 910 911static int 912acpi_release_resource(device_t bus, device_t child, int type, int rid, 913 struct resource *r) 914{ 915 int ret; 916 917 /* 918 * If we know about this address, deactivate it and release it to the 919 * local pool. If we don't, pass this request up to the parent. 920 */ 921 if (acpi_sysres_find(type, rman_get_start(r)) == NULL) { 922 if (rman_get_flags(r) & RF_ACTIVE) { 923 ret = bus_deactivate_resource(child, type, rid, r); 924 if (ret != 0) 925 return (ret); 926 } 927 ret = rman_release_resource(r); 928 } else 929 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 930 931 return (ret); 932} 933 934/* Allocate an IO port or memory resource, given its GAS. */ 935struct resource * 936acpi_bus_alloc_gas(device_t dev, int *rid, ACPI_GENERIC_ADDRESS *gas) 937{ 938 int type; 939 940 if (gas == NULL || !ACPI_VALID_ADDRESS(gas->Address) || 941 gas->RegisterBitWidth < 8) 942 return (NULL); 943 944 switch (gas->AddressSpaceId) { 945 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 946 type = SYS_RES_MEMORY; 947 break; 948 case ACPI_ADR_SPACE_SYSTEM_IO: 949 type = SYS_RES_IOPORT; 950 break; 951 default: 952 return (NULL); 953 } 954 955 bus_set_resource(dev, type, *rid, gas->Address, gas->RegisterBitWidth / 8); 956 return (bus_alloc_resource_any(dev, type, rid, RF_ACTIVE)); 957} 958 959/* 960 * Handle ISA-like devices probing for a PnP ID to match. 961 */ 962#define PNP_EISAID(s) \ 963 ((((s[0] - '@') & 0x1f) << 2) \ 964 | (((s[1] - '@') & 0x18) >> 3) \ 965 | (((s[1] - '@') & 0x07) << 13) \ 966 | (((s[2] - '@') & 0x1f) << 8) \ 967 | (PNP_HEXTONUM(s[4]) << 16) \ 968 | (PNP_HEXTONUM(s[3]) << 20) \ 969 | (PNP_HEXTONUM(s[6]) << 24) \ 970 | (PNP_HEXTONUM(s[5]) << 28)) 971 972static uint32_t 973acpi_isa_get_logicalid(device_t dev) 974{ 975 ACPI_DEVICE_INFO *devinfo; 976 ACPI_BUFFER buf; 977 ACPI_HANDLE h; 978 ACPI_STATUS error; 979 u_int32_t pnpid; 980 ACPI_LOCK_DECL; 981 982 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 983 984 pnpid = 0; 985 buf.Pointer = NULL; 986 buf.Length = ACPI_ALLOCATE_BUFFER; 987 988 ACPI_LOCK; 989 990 /* Fetch and validate the HID. */ 991 if ((h = acpi_get_handle(dev)) == NULL) 992 goto out; 993 error = AcpiGetObjectInfo(h, &buf); 994 if (ACPI_FAILURE(error)) 995 goto out; 996 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 997 998 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 999 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 1000 1001out: 1002 if (buf.Pointer != NULL) 1003 AcpiOsFree(buf.Pointer); 1004 ACPI_UNLOCK; 1005 return_VALUE (pnpid); 1006} 1007 1008static int 1009acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1010{ 1011 ACPI_DEVICE_INFO *devinfo; 1012 ACPI_BUFFER buf; 1013 ACPI_HANDLE h; 1014 ACPI_STATUS error; 1015 uint32_t *pnpid; 1016 int valid, i; 1017 ACPI_LOCK_DECL; 1018 1019 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1020 1021 pnpid = cids; 1022 valid = 0; 1023 buf.Pointer = NULL; 1024 buf.Length = ACPI_ALLOCATE_BUFFER; 1025 1026 ACPI_LOCK; 1027 1028 /* Fetch and validate the CID */ 1029 if ((h = acpi_get_handle(dev)) == NULL) 1030 goto out; 1031 error = AcpiGetObjectInfo(h, &buf); 1032 if (ACPI_FAILURE(error)) 1033 goto out; 1034 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1035 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1036 goto out; 1037 1038 if (devinfo->CompatibilityId.Count < count) 1039 count = devinfo->CompatibilityId.Count; 1040 for (i = 0; i < count; i++) { 1041 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 1042 continue; 1043 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 1044 valid++; 1045 } 1046 1047out: 1048 if (buf.Pointer != NULL) 1049 AcpiOsFree(buf.Pointer); 1050 ACPI_UNLOCK; 1051 return_VALUE (valid); 1052} 1053 1054static int 1055acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1056{ 1057 int result, cid_count, i; 1058 uint32_t lid, cids[8]; 1059 1060 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1061 1062 /* 1063 * ISA-style drivers attached to ACPI may persist and 1064 * probe manually if we return ENOENT. We never want 1065 * that to happen, so don't ever return it. 1066 */ 1067 result = ENXIO; 1068 1069 /* Scan the supplied IDs for a match */ 1070 lid = acpi_isa_get_logicalid(child); 1071 cid_count = acpi_isa_get_compatid(child, cids, 8); 1072 while (ids && ids->ip_id) { 1073 if (lid == ids->ip_id) { 1074 result = 0; 1075 goto out; 1076 } 1077 for (i = 0; i < cid_count; i++) { 1078 if (cids[i] == ids->ip_id) { 1079 result = 0; 1080 goto out; 1081 } 1082 } 1083 ids++; 1084 } 1085 1086 out: 1087 return_VALUE (result); 1088} 1089 1090/* 1091 * Scan relevant portions of the ACPI namespace and attach child devices. 1092 * 1093 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and 1094 * \_SB_ scopes, and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 1095 */ 1096static void 1097acpi_probe_children(device_t bus) 1098{ 1099 ACPI_HANDLE parent; 1100 ACPI_STATUS status; 1101 int i; 1102 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 1103 1104 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1105 ACPI_ASSERTLOCK; 1106 1107 /* Create any static children by calling device identify methods. */ 1108 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1109 bus_generic_probe(bus); 1110 1111 /* 1112 * Scan the namespace and insert placeholders for all the devices that 1113 * we find. 1114 * 1115 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1116 * we want to create nodes for all devices, not just those that are 1117 * currently present. (This assumes that we don't want to create/remove 1118 * devices as they appear, which might be smarter.) 1119 */ 1120 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1121 for (i = 0; scopes[i] != NULL; i++) { 1122 status = AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent); 1123 if (ACPI_SUCCESS(status)) { 1124 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, 1125 bus, NULL); 1126 } 1127 } 1128 1129 /* 1130 * Scan all of the child devices we have created and let them probe/attach. 1131 */ 1132 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1133 bus_generic_attach(bus); 1134 1135 /* 1136 * Some of these children may have attached others as part of their attach 1137 * process (eg. the root PCI bus driver), so rescan. 1138 */ 1139 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1140 bus_generic_attach(bus); 1141 1142 /* Attach wake sysctls. */ 1143 acpi_wake_sysctl_walk(bus); 1144 1145 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1146 return_VOID; 1147} 1148 1149/* 1150 * Determine the probe order for a given device and return non-zero if it 1151 * should be attached immediately. 1152 */ 1153static int 1154acpi_probe_order(ACPI_HANDLE handle, int *order) 1155{ 1156 int ret; 1157 1158 /* 1159 * 1. I/O port and memory system resource holders 1160 * 2. Embedded controllers (to handle early accesses) 1161 */ 1162 ret = 0; 1163 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) { 1164 *order = 1; 1165 ret = 1; 1166 } else if (acpi_MatchHid(handle, "PNP0C09")) { 1167 *order = 2; 1168 ret = 1; 1169 } 1170 1171 /* Always probe/attach immediately if we're debugging. */ 1172 ACPI_DEBUG_EXEC(ret = 1); 1173 1174 return (ret); 1175} 1176 1177/* 1178 * Evaluate a child device and determine whether we might attach a device to 1179 * it. 1180 */ 1181static ACPI_STATUS 1182acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1183{ 1184 ACPI_OBJECT_TYPE type; 1185 device_t child, bus; 1186 int order, probe_now; 1187 1188 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1189 1190 /* Skip this device if we think we'll have trouble with it. */ 1191 if (acpi_avoid(handle)) 1192 return_ACPI_STATUS (AE_OK); 1193 1194 bus = (device_t)context; 1195 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1196 switch(type) { 1197 case ACPI_TYPE_DEVICE: 1198 case ACPI_TYPE_PROCESSOR: 1199 case ACPI_TYPE_THERMAL: 1200 case ACPI_TYPE_POWER: 1201 if (acpi_disabled("children")) 1202 break; 1203 1204 /* 1205 * Create a placeholder device for this node. Sort the placeholder 1206 * so that the probe/attach passes will run breadth-first. Orders 1207 * less than 10 are reserved for special objects (i.e., system 1208 * resources). Larger values are used for all other devices. 1209 */ 1210 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", 1211 acpi_name(handle))); 1212 order = (level + 1) * 10; 1213 probe_now = acpi_probe_order(handle, &order); 1214 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1215 if (child == NULL) 1216 break; 1217 1218 /* Associate the handle with the device_t and vice versa. */ 1219 acpi_set_handle(child, handle); 1220 AcpiAttachData(handle, acpi_fake_objhandler, child); 1221 1222 /* Check if the device can generate wake events. */ 1223 if (ACPI_SUCCESS(AcpiEvaluateObject(handle, "_PRW", NULL, NULL))) 1224 device_set_flags(child, ACPI_FLAG_WAKE_CAPABLE); 1225 1226 /* 1227 * Check that the device is present. If it's not present, 1228 * leave it disabled (so that we have a device_t attached to 1229 * the handle, but we don't probe it). 1230 */ 1231 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1232 device_disable(child); 1233 break; 1234 } 1235 1236 /* 1237 * Get the device's resource settings and attach them. 1238 * Note that if the device has _PRS but no _CRS, we need 1239 * to decide when it's appropriate to try to configure the 1240 * device. Ignore the return value here; it's OK for the 1241 * device not to have any resources. 1242 */ 1243 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1244 1245 /* If order was overridden, probe/attach now rather than later. */ 1246 if (probe_now) 1247 device_probe_and_attach(child); 1248 break; 1249 } 1250 } 1251 1252 return_ACPI_STATUS (AE_OK); 1253} 1254 1255/* 1256 * AcpiAttachData() requires an object handler but never uses it. This is a 1257 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1258 */ 1259void 1260acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data) 1261{ 1262} 1263 1264static void 1265acpi_shutdown_final(void *arg, int howto) 1266{ 1267 ACPI_STATUS status; 1268 1269 /* 1270 * If powering off, run the actual shutdown code on each processor. 1271 * It will only perform the shutdown on the BSP. Some chipsets do 1272 * not power off the system correctly if called from an AP. 1273 */ 1274 if ((howto & RB_POWEROFF) != 0) { 1275 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1276 if (ACPI_FAILURE(status)) { 1277 printf("AcpiEnterSleepStatePrep failed - %s\n", 1278 AcpiFormatException(status)); 1279 return; 1280 } 1281 printf("Powering system off using ACPI\n"); 1282 smp_rendezvous(NULL, acpi_shutdown_poweroff, NULL, NULL); 1283 } else { 1284 printf("Shutting down ACPI\n"); 1285 AcpiTerminate(); 1286 } 1287} 1288 1289/* 1290 * Since this function may be called with locks held or in an unknown 1291 * context, it cannot allocate memory, acquire locks, sleep, etc. 1292 */ 1293static void 1294acpi_shutdown_poweroff(void *arg) 1295{ 1296 ACPI_STATUS status; 1297 1298 /* Only attempt to power off if this is the BSP (cpuid 0). */ 1299 if (PCPU_GET(cpuid) != 0) 1300 return; 1301 1302 ACPI_DISABLE_IRQS(); 1303 status = AcpiEnterSleepState(ACPI_STATE_S5); 1304 if (ACPI_FAILURE(status)) { 1305 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1306 } else { 1307 DELAY(1000000); 1308 printf("ACPI power-off failed - timeout\n"); 1309 } 1310} 1311 1312static void 1313acpi_enable_fixed_events(struct acpi_softc *sc) 1314{ 1315 static int first_time = 1; 1316 1317 ACPI_ASSERTLOCK; 1318 1319 /* Enable and clear fixed events and install handlers. */ 1320 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 1321 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1322 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1323 acpi_event_power_button_sleep, sc); 1324 if (first_time) 1325 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1326 } 1327 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 1328 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1329 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1330 acpi_event_sleep_button_sleep, sc); 1331 if (first_time) 1332 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1333 } 1334 1335 first_time = 0; 1336} 1337 1338/* 1339 * Returns true if the device is actually present and should 1340 * be attached to. This requires the present, enabled, UI-visible 1341 * and diagnostics-passed bits to be set. 1342 */ 1343BOOLEAN 1344acpi_DeviceIsPresent(device_t dev) 1345{ 1346 ACPI_DEVICE_INFO *devinfo; 1347 ACPI_HANDLE h; 1348 ACPI_BUFFER buf; 1349 ACPI_STATUS error; 1350 int ret; 1351 1352 ACPI_ASSERTLOCK; 1353 1354 ret = FALSE; 1355 if ((h = acpi_get_handle(dev)) == NULL) 1356 return (FALSE); 1357 buf.Pointer = NULL; 1358 buf.Length = ACPI_ALLOCATE_BUFFER; 1359 error = AcpiGetObjectInfo(h, &buf); 1360 if (ACPI_FAILURE(error)) 1361 return (FALSE); 1362 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1363 1364 /* If no _STA method, must be present */ 1365 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1366 ret = TRUE; 1367 1368 /* Return true for 'present' and 'functioning' */ 1369 if ((devinfo->CurrentStatus & 0x9) == 0x9) 1370 ret = TRUE; 1371 1372 AcpiOsFree(buf.Pointer); 1373 return (ret); 1374} 1375 1376/* 1377 * Returns true if the battery is actually present and inserted. 1378 */ 1379BOOLEAN 1380acpi_BatteryIsPresent(device_t dev) 1381{ 1382 ACPI_DEVICE_INFO *devinfo; 1383 ACPI_HANDLE h; 1384 ACPI_BUFFER buf; 1385 ACPI_STATUS error; 1386 int ret; 1387 1388 ACPI_ASSERTLOCK; 1389 1390 ret = FALSE; 1391 if ((h = acpi_get_handle(dev)) == NULL) 1392 return (FALSE); 1393 buf.Pointer = NULL; 1394 buf.Length = ACPI_ALLOCATE_BUFFER; 1395 error = AcpiGetObjectInfo(h, &buf); 1396 if (ACPI_FAILURE(error)) 1397 return (FALSE); 1398 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1399 1400 /* If no _STA method, must be present */ 1401 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1402 ret = TRUE; 1403 1404 /* Return true for 'present' and 'functioning' */ 1405 if ((devinfo->CurrentStatus & 0x19) == 0x19) 1406 ret = TRUE; 1407 1408 AcpiOsFree(buf.Pointer); 1409 return (ret); 1410} 1411 1412/* 1413 * Match a HID string against a handle 1414 */ 1415BOOLEAN 1416acpi_MatchHid(ACPI_HANDLE h, char *hid) 1417{ 1418 ACPI_DEVICE_INFO *devinfo; 1419 ACPI_BUFFER buf; 1420 ACPI_STATUS error; 1421 int ret, i; 1422 1423 ACPI_ASSERTLOCK; 1424 1425 ret = FALSE; 1426 if (hid == NULL || h == NULL) 1427 return (ret); 1428 buf.Pointer = NULL; 1429 buf.Length = ACPI_ALLOCATE_BUFFER; 1430 error = AcpiGetObjectInfo(h, &buf); 1431 if (ACPI_FAILURE(error)) 1432 return (ret); 1433 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1434 1435 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1436 strcmp(hid, devinfo->HardwareId.Value) == 0) 1437 ret = TRUE; 1438 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1439 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1440 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1441 ret = TRUE; 1442 break; 1443 } 1444 } 1445 } 1446 1447 AcpiOsFree(buf.Pointer); 1448 return (ret); 1449} 1450 1451/* 1452 * Return the handle of a named object within our scope, ie. that of (parent) 1453 * or one if its parents. 1454 */ 1455ACPI_STATUS 1456acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1457{ 1458 ACPI_HANDLE r; 1459 ACPI_STATUS status; 1460 1461 ACPI_ASSERTLOCK; 1462 1463 /* Walk back up the tree to the root */ 1464 for (;;) { 1465 status = AcpiGetHandle(parent, path, &r); 1466 if (ACPI_SUCCESS(status)) { 1467 *result = r; 1468 return (AE_OK); 1469 } 1470 if (status != AE_NOT_FOUND) 1471 return (AE_OK); 1472 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1473 return (AE_NOT_FOUND); 1474 parent = r; 1475 } 1476} 1477 1478/* Find the difference between two PM tick counts. */ 1479uint32_t 1480acpi_TimerDelta(uint32_t end, uint32_t start) 1481{ 1482 uint32_t delta; 1483 1484 if (end >= start) 1485 delta = end - start; 1486 else if (AcpiGbl_FADT->TmrValExt == 0) 1487 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 1488 else 1489 delta = ((0xFFFFFFFF - start) + end + 1); 1490 return (delta); 1491} 1492 1493/* 1494 * Allocate a buffer with a preset data size. 1495 */ 1496ACPI_BUFFER * 1497acpi_AllocBuffer(int size) 1498{ 1499 ACPI_BUFFER *buf; 1500 1501 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1502 return (NULL); 1503 buf->Length = size; 1504 buf->Pointer = (void *)(buf + 1); 1505 return (buf); 1506} 1507 1508ACPI_STATUS 1509acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1510{ 1511 ACPI_OBJECT arg1; 1512 ACPI_OBJECT_LIST args; 1513 1514 ACPI_ASSERTLOCK; 1515 1516 arg1.Type = ACPI_TYPE_INTEGER; 1517 arg1.Integer.Value = number; 1518 args.Count = 1; 1519 args.Pointer = &arg1; 1520 1521 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1522} 1523 1524/* 1525 * Evaluate a path that should return an integer. 1526 */ 1527ACPI_STATUS 1528acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1529{ 1530 ACPI_STATUS status; 1531 ACPI_BUFFER buf; 1532 ACPI_OBJECT param; 1533 1534 ACPI_ASSERTLOCK; 1535 1536 if (handle == NULL) 1537 handle = ACPI_ROOT_OBJECT; 1538 1539 /* 1540 * Assume that what we've been pointed at is an Integer object, or 1541 * a method that will return an Integer. 1542 */ 1543 buf.Pointer = ¶m; 1544 buf.Length = sizeof(param); 1545 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1546 if (ACPI_SUCCESS(status)) { 1547 if (param.Type == ACPI_TYPE_INTEGER) 1548 *number = param.Integer.Value; 1549 else 1550 status = AE_TYPE; 1551 } 1552 1553 /* 1554 * In some applications, a method that's expected to return an Integer 1555 * may instead return a Buffer (probably to simplify some internal 1556 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1557 * convert it into an Integer as best we can. 1558 * 1559 * This is a hack. 1560 */ 1561 if (status == AE_BUFFER_OVERFLOW) { 1562 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1563 status = AE_NO_MEMORY; 1564 } else { 1565 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1566 if (ACPI_SUCCESS(status)) 1567 status = acpi_ConvertBufferToInteger(&buf, number); 1568 AcpiOsFree(buf.Pointer); 1569 } 1570 } 1571 return (status); 1572} 1573 1574ACPI_STATUS 1575acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1576{ 1577 ACPI_OBJECT *p; 1578 UINT8 *val; 1579 int i; 1580 1581 p = (ACPI_OBJECT *)bufp->Pointer; 1582 if (p->Type == ACPI_TYPE_INTEGER) { 1583 *number = p->Integer.Value; 1584 return (AE_OK); 1585 } 1586 if (p->Type != ACPI_TYPE_BUFFER) 1587 return (AE_TYPE); 1588 if (p->Buffer.Length > sizeof(int)) 1589 return (AE_BAD_DATA); 1590 1591 *number = 0; 1592 val = p->Buffer.Pointer; 1593 for (i = 0; i < p->Buffer.Length; i++) 1594 *number += val[i] << (i * 8); 1595 return (AE_OK); 1596} 1597 1598/* 1599 * Iterate over the elements of an a package object, calling the supplied 1600 * function for each element. 1601 * 1602 * XXX possible enhancement might be to abort traversal on error. 1603 */ 1604ACPI_STATUS 1605acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1606 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1607{ 1608 ACPI_OBJECT *comp; 1609 int i; 1610 1611 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1612 return (AE_BAD_PARAMETER); 1613 1614 /* Iterate over components */ 1615 i = 0; 1616 comp = pkg->Package.Elements; 1617 for (; i < pkg->Package.Count; i++, comp++) 1618 func(comp, arg); 1619 1620 return (AE_OK); 1621} 1622 1623/* 1624 * Find the (index)th resource object in a set. 1625 */ 1626ACPI_STATUS 1627acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1628{ 1629 ACPI_RESOURCE *rp; 1630 int i; 1631 1632 rp = (ACPI_RESOURCE *)buf->Pointer; 1633 i = index; 1634 while (i-- > 0) { 1635 /* Range check */ 1636 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1637 return (AE_BAD_PARAMETER); 1638 1639 /* Check for terminator */ 1640 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1641 return (AE_NOT_FOUND); 1642 rp = ACPI_NEXT_RESOURCE(rp); 1643 } 1644 if (resp != NULL) 1645 *resp = rp; 1646 1647 return (AE_OK); 1648} 1649 1650/* 1651 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1652 * 1653 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1654 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1655 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1656 * resources. 1657 */ 1658#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1659 1660ACPI_STATUS 1661acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1662{ 1663 ACPI_RESOURCE *rp; 1664 void *newp; 1665 1666 /* Initialise the buffer if necessary. */ 1667 if (buf->Pointer == NULL) { 1668 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1669 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1670 return (AE_NO_MEMORY); 1671 rp = (ACPI_RESOURCE *)buf->Pointer; 1672 rp->Id = ACPI_RSTYPE_END_TAG; 1673 rp->Length = 0; 1674 } 1675 if (res == NULL) 1676 return (AE_OK); 1677 1678 /* 1679 * Scan the current buffer looking for the terminator. 1680 * This will either find the terminator or hit the end 1681 * of the buffer and return an error. 1682 */ 1683 rp = (ACPI_RESOURCE *)buf->Pointer; 1684 for (;;) { 1685 /* Range check, don't go outside the buffer */ 1686 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1687 return (AE_BAD_PARAMETER); 1688 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1689 break; 1690 rp = ACPI_NEXT_RESOURCE(rp); 1691 } 1692 1693 /* 1694 * Check the size of the buffer and expand if required. 1695 * 1696 * Required size is: 1697 * size of existing resources before terminator + 1698 * size of new resource and header + 1699 * size of terminator. 1700 * 1701 * Note that this loop should really only run once, unless 1702 * for some reason we are stuffing a *really* huge resource. 1703 */ 1704 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1705 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1706 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1707 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1708 return (AE_NO_MEMORY); 1709 bcopy(buf->Pointer, newp, buf->Length); 1710 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1711 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1712 AcpiOsFree(buf->Pointer); 1713 buf->Pointer = newp; 1714 buf->Length += buf->Length; 1715 } 1716 1717 /* Insert the new resource. */ 1718 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1719 1720 /* And add the terminator. */ 1721 rp = ACPI_NEXT_RESOURCE(rp); 1722 rp->Id = ACPI_RSTYPE_END_TAG; 1723 rp->Length = 0; 1724 1725 return (AE_OK); 1726} 1727 1728/* 1729 * Set interrupt model. 1730 */ 1731ACPI_STATUS 1732acpi_SetIntrModel(int model) 1733{ 1734 1735 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 1736} 1737 1738#define ACPI_MINIMUM_AWAKETIME 5 1739 1740static void 1741acpi_sleep_enable(void *arg) 1742{ 1743 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1744} 1745 1746/* 1747 * Set the system sleep state 1748 * 1749 * Currently we support S1-S5 but S4 is only S4BIOS 1750 */ 1751ACPI_STATUS 1752acpi_SetSleepState(struct acpi_softc *sc, int state) 1753{ 1754 ACPI_STATUS status = AE_OK; 1755 UINT8 TypeA; 1756 UINT8 TypeB; 1757 1758 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1759 ACPI_ASSERTLOCK; 1760 1761 /* Avoid reentry if already attempting to suspend. */ 1762 if (sc->acpi_sstate != ACPI_STATE_S0) 1763 return_ACPI_STATUS (AE_BAD_PARAMETER); 1764 1765 /* We recently woke up so don't suspend again for a while. */ 1766 if (sc->acpi_sleep_disabled) 1767 return_ACPI_STATUS (AE_OK); 1768 1769 switch (state) { 1770 case ACPI_STATE_S1: 1771 case ACPI_STATE_S2: 1772 case ACPI_STATE_S3: 1773 case ACPI_STATE_S4: 1774 status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB); 1775 if (status == AE_NOT_FOUND) { 1776 device_printf(sc->acpi_dev, 1777 "Sleep state S%d not supported by BIOS\n", state); 1778 break; 1779 } else if (ACPI_FAILURE(status)) { 1780 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 1781 AcpiFormatException(status)); 1782 break; 1783 } 1784 1785 sc->acpi_sstate = state; 1786 sc->acpi_sleep_disabled = 1; 1787 1788 /* Disable all wake GPEs not appropriate for this state. */ 1789 acpi_wake_limit_walk(state); 1790 1791 /* Inform all devices that we are going to sleep. */ 1792 if (DEVICE_SUSPEND(root_bus) != 0) { 1793 /* 1794 * Re-wake the system. 1795 * 1796 * XXX note that a better two-pass approach with a 'veto' pass 1797 * followed by a "real thing" pass would be better, but the 1798 * current bus interface does not provide for this. 1799 */ 1800 DEVICE_RESUME(root_bus); 1801 return_ACPI_STATUS (AE_ERROR); 1802 } 1803 1804 status = AcpiEnterSleepStatePrep(state); 1805 if (ACPI_FAILURE(status)) { 1806 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1807 AcpiFormatException(status)); 1808 break; 1809 } 1810 1811 if (sc->acpi_sleep_delay > 0) 1812 DELAY(sc->acpi_sleep_delay * 1000000); 1813 1814 if (state != ACPI_STATE_S1) { 1815 acpi_sleep_machdep(sc, state); 1816 1817 /* AcpiEnterSleepState() may be incomplete, unlock if locked. */ 1818 if (AcpiGbl_MutexInfo[ACPI_MTX_HARDWARE].OwnerId != 1819 ACPI_MUTEX_NOT_ACQUIRED) { 1820 1821 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1822 } 1823 1824 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1825 if (state == ACPI_STATE_S4) 1826 AcpiEnable(); 1827 } else { 1828 status = AcpiEnterSleepState((UINT8)state); 1829 if (ACPI_FAILURE(status)) { 1830 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 1831 AcpiFormatException(status)); 1832 break; 1833 } 1834 } 1835 AcpiLeaveSleepState((UINT8)state); 1836 DEVICE_RESUME(root_bus); 1837 sc->acpi_sstate = ACPI_STATE_S0; 1838 acpi_enable_fixed_events(sc); 1839 break; 1840 case ACPI_STATE_S5: 1841 /* 1842 * Shut down cleanly and power off. This will call us back through the 1843 * shutdown handlers. 1844 */ 1845 shutdown_nice(RB_POWEROFF); 1846 break; 1847 case ACPI_STATE_S0: 1848 default: 1849 status = AE_BAD_PARAMETER; 1850 break; 1851 } 1852 1853 /* Disable a second sleep request for a short period */ 1854 if (sc->acpi_sleep_disabled) 1855 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 1856 1857 return_ACPI_STATUS (status); 1858} 1859 1860/* Initialize a device's wake GPE. */ 1861int 1862acpi_wake_init(device_t dev, int type) 1863{ 1864 struct acpi_prw_data prw; 1865 1866 /* Check that the device can wake the system. */ 1867 if ((device_get_flags(dev) & ACPI_FLAG_WAKE_CAPABLE) == 0) 1868 return (ENXIO); 1869 1870 /* Evaluate _PRW to find the GPE. */ 1871 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 1872 return (ENXIO); 1873 1874 /* Set the requested type for the GPE (runtime, wake, or both). */ 1875 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 1876 device_printf(dev, "set GPE type failed\n"); 1877 return (ENXIO); 1878 } 1879 1880 return (0); 1881} 1882 1883/* Enable or disable the device's wake GPE. */ 1884int 1885acpi_wake_set_enable(device_t dev, int enable) 1886{ 1887 struct acpi_prw_data prw; 1888 ACPI_HANDLE handle; 1889 ACPI_STATUS status; 1890 int flags; 1891 1892 /* Make sure the device supports waking the system. */ 1893 flags = device_get_flags(dev); 1894 handle = acpi_get_handle(dev); 1895 if ((flags & ACPI_FLAG_WAKE_CAPABLE) == 0 || handle == NULL) 1896 return (ENXIO); 1897 1898 /* Evaluate _PRW to find the GPE. */ 1899 if (acpi_parse_prw(handle, &prw) != 0) 1900 return (ENXIO); 1901 1902 if (enable) { 1903 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 1904 if (ACPI_FAILURE(status)) { 1905 device_printf(dev, "enable wake failed\n"); 1906 return (ENXIO); 1907 } 1908 device_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 1909 } else { 1910 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 1911 if (ACPI_FAILURE(status)) { 1912 device_printf(dev, "disable wake failed\n"); 1913 return (ENXIO); 1914 } 1915 device_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 1916 } 1917 1918 return (0); 1919} 1920 1921/* Configure a device's GPE appropriately for the new sleep state. */ 1922int 1923acpi_wake_sleep_prep(device_t dev, int sstate) 1924{ 1925 struct acpi_prw_data prw; 1926 ACPI_HANDLE handle; 1927 int flags; 1928 1929 /* Check that this is an ACPI device and get its GPE. */ 1930 flags = device_get_flags(dev); 1931 handle = acpi_get_handle(dev); 1932 if ((flags & ACPI_FLAG_WAKE_CAPABLE) == 0 || handle == NULL) 1933 return (ENXIO); 1934 1935 /* Evaluate _PRW to find the GPE. */ 1936 if (acpi_parse_prw(handle, &prw) != 0) 1937 return (ENXIO); 1938 1939 /* 1940 * TBD: All Power Resources referenced by elements 2 through N 1941 * of the _PRW object are put into the ON state. 1942 */ 1943 1944 /* 1945 * If the user requested that this device wake the system and the next 1946 * sleep state is valid for this GPE, enable it and the device's wake 1947 * capability. The sleep state must be less than (i.e., higher power) 1948 * or equal to the value specified by _PRW. Return early, leaving 1949 * the appropriate power resources enabled. 1950 */ 1951 if ((flags & ACPI_FLAG_WAKE_ENABLED) != 0 && 1952 sstate <= prw.lowest_wake) { 1953 if (bootverbose) 1954 device_printf(dev, "wake_prep enabled gpe %#x for state %d\n", 1955 prw.gpe_bit, sstate); 1956 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 1957 acpi_SetInteger(handle, "_PSW", 1); 1958 return (0); 1959 } 1960 1961 /* 1962 * If the device wake was disabled or this sleep state is too low for 1963 * this device, disable its wake capability and GPE. 1964 */ 1965 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 1966 acpi_SetInteger(handle, "_PSW", 0); 1967 if (bootverbose) 1968 device_printf(dev, "wake_prep disabled gpe %#x for state %d\n", 1969 prw.gpe_bit, sstate); 1970 1971 /* 1972 * TBD: All Power Resources referenced by elements 2 through N 1973 * of the _PRW object are put into the OFF state. 1974 */ 1975 1976 return (0); 1977} 1978 1979/* Re-enable GPEs after wake. */ 1980int 1981acpi_wake_run_prep(device_t dev) 1982{ 1983 struct acpi_prw_data prw; 1984 ACPI_HANDLE handle; 1985 int flags; 1986 1987 /* Check that this is an ACPI device and get its GPE. */ 1988 flags = device_get_flags(dev); 1989 handle = acpi_get_handle(dev); 1990 if ((flags & ACPI_FLAG_WAKE_CAPABLE) == 0 || handle == NULL) 1991 return (ENXIO); 1992 1993 /* Evaluate _PRW to find the GPE. */ 1994 if (acpi_parse_prw(handle, &prw) != 0) 1995 return (ENXIO); 1996 1997 /* 1998 * TBD: Be sure all Power Resources referenced by elements 2 through N 1999 * of the _PRW object are in the ON state. 2000 */ 2001 2002 /* Disable wake capability and if the user requested, enable the GPE. */ 2003 acpi_SetInteger(handle, "_PSW", 0); 2004 if ((flags & ACPI_FLAG_WAKE_ENABLED) != 0) 2005 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2006 return (0); 2007} 2008 2009static ACPI_STATUS 2010acpi_wake_limit(ACPI_HANDLE h, UINT32 level, void *context, void **status) 2011{ 2012 struct acpi_prw_data prw; 2013 int *sstate; 2014 2015 /* It's ok not to have _PRW if the device can't wake the system. */ 2016 if (acpi_parse_prw(h, &prw) != 0) 2017 return (AE_OK); 2018 2019 sstate = (int *)context; 2020 if (*sstate > prw.lowest_wake) 2021 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2022 2023 return (AE_OK); 2024} 2025 2026/* Walk all system devices, disabling them if necessary for sstate. */ 2027static int 2028acpi_wake_limit_walk(int sstate) 2029{ 2030 ACPI_HANDLE sb_handle; 2031 2032 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2033 AcpiWalkNamespace(ACPI_TYPE_ANY, sb_handle, 100, 2034 acpi_wake_limit, &sstate, NULL); 2035 return (0); 2036} 2037 2038/* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2039static int 2040acpi_wake_sysctl_walk(device_t dev) 2041{ 2042 int error, i, numdevs; 2043 device_t *devlist; 2044 device_t child; 2045 2046 error = device_get_children(dev, &devlist, &numdevs); 2047 if (error != 0 || numdevs == 0) 2048 return (error); 2049 for (i = 0; i < numdevs; i++) { 2050 child = devlist[i]; 2051 if (!device_is_attached(child)) 2052 continue; 2053 if (device_get_flags(child) & ACPI_FLAG_WAKE_CAPABLE) { 2054 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2055 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2056 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2057 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2058 } 2059 acpi_wake_sysctl_walk(child); 2060 } 2061 free(devlist, M_TEMP); 2062 2063 return (0); 2064} 2065 2066/* Enable or disable wake from userland. */ 2067static int 2068acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2069{ 2070 int enable, error; 2071 device_t dev; 2072 2073 dev = (device_t)arg1; 2074 enable = (device_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2075 2076 error = sysctl_handle_int(oidp, &enable, 0, req); 2077 if (error != 0 || req->newptr == NULL) 2078 return (error); 2079 if (enable != 0 && enable != 1) 2080 return (EINVAL); 2081 2082 return (acpi_wake_set_enable(dev, enable)); 2083} 2084 2085/* Parse a device's _PRW into a structure. */ 2086static int 2087acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2088{ 2089 ACPI_STATUS status; 2090 ACPI_BUFFER prw_buffer; 2091 ACPI_OBJECT *res, *res2; 2092 int error; 2093 2094 if (h == NULL || prw == NULL) 2095 return (EINVAL); 2096 2097 /* 2098 * The _PRW object (7.2.9) is only required for devices that have the 2099 * ability to wake the system from a sleeping state. 2100 */ 2101 error = EINVAL; 2102 prw_buffer.Pointer = NULL; 2103 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2104 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2105 if (ACPI_FAILURE(status)) 2106 return (ENOENT); 2107 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2108 if (res == NULL) 2109 return (ENOENT); 2110 if (!ACPI_PKG_VALID(res, 2)) 2111 goto out; 2112 2113 /* 2114 * Element 1 of the _PRW object: 2115 * The lowest power system sleeping state that can be entered while still 2116 * providing wake functionality. The sleeping state being entered must 2117 * be less than (i.e., higher power) or equal to this value. 2118 */ 2119 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2120 goto out; 2121 2122 /* 2123 * Element 0 of the _PRW object: 2124 */ 2125 switch (res->Package.Elements[0].Type) { 2126 case ACPI_TYPE_INTEGER: 2127 /* 2128 * If the data type of this package element is numeric, then this 2129 * _PRW package element is the bit index in the GPEx_EN, in the 2130 * GPE blocks described in the FADT, of the enable bit that is 2131 * enabled for the wake event. 2132 */ 2133 prw->gpe_handle = NULL; 2134 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2135 error = 0; 2136 break; 2137 case ACPI_TYPE_PACKAGE: 2138 /* 2139 * If the data type of this package element is a package, then this 2140 * _PRW package element is itself a package containing two 2141 * elements. The first is an object reference to the GPE Block 2142 * device that contains the GPE that will be triggered by the wake 2143 * event. The second element is numeric and it contains the bit 2144 * index in the GPEx_EN, in the GPE Block referenced by the 2145 * first element in the package, of the enable bit that is enabled for 2146 * the wake event. 2147 * 2148 * For example, if this field is a package then it is of the form: 2149 * Package() {\_SB.PCI0.ISA.GPE, 2} 2150 */ 2151 res2 = &res->Package.Elements[0]; 2152 if (!ACPI_PKG_VALID(res2, 2)) 2153 goto out; 2154 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2155 if (prw->gpe_handle == NULL) 2156 goto out; 2157 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2158 goto out; 2159 error = 0; 2160 break; 2161 default: 2162 goto out; 2163 } 2164 2165 /* XXX No power resource handling yet. */ 2166 prw->power_res = NULL; 2167 2168out: 2169 if (prw_buffer.Pointer != NULL) 2170 AcpiOsFree(prw_buffer.Pointer); 2171 return (error); 2172} 2173 2174/* 2175 * Enable/Disable ACPI 2176 */ 2177ACPI_STATUS 2178acpi_Enable(struct acpi_softc *sc) 2179{ 2180 ACPI_STATUS status; 2181 u_int32_t flags; 2182 2183 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2184 ACPI_ASSERTLOCK; 2185 2186 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 2187 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 2188 if (!sc->acpi_enabled) 2189 status = AcpiEnableSubsystem(flags); 2190 else 2191 status = AE_OK; 2192 2193 if (status == AE_OK) 2194 sc->acpi_enabled = 1; 2195 2196 return_ACPI_STATUS (status); 2197} 2198 2199ACPI_STATUS 2200acpi_Disable(struct acpi_softc *sc) 2201{ 2202 ACPI_STATUS status; 2203 2204 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2205 ACPI_ASSERTLOCK; 2206 2207 if (sc->acpi_enabled) 2208 status = AcpiDisable(); 2209 else 2210 status = AE_OK; 2211 2212 if (status == AE_OK) 2213 sc->acpi_enabled = 0; 2214 2215 return_ACPI_STATUS (status); 2216} 2217 2218/* 2219 * ACPI Event Handlers 2220 */ 2221 2222/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2223 2224static void 2225acpi_system_eventhandler_sleep(void *arg, int state) 2226{ 2227 ACPI_LOCK_DECL; 2228 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2229 2230 ACPI_LOCK; 2231 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2232 acpi_SetSleepState((struct acpi_softc *)arg, state); 2233 ACPI_UNLOCK; 2234 return_VOID; 2235} 2236 2237static void 2238acpi_system_eventhandler_wakeup(void *arg, int state) 2239{ 2240 ACPI_LOCK_DECL; 2241 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2242 2243 /* Well, what to do? :-) */ 2244 2245 ACPI_LOCK; 2246 ACPI_UNLOCK; 2247 2248 return_VOID; 2249} 2250 2251/* 2252 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2253 */ 2254UINT32 2255acpi_event_power_button_sleep(void *context) 2256{ 2257 struct acpi_softc *sc = (struct acpi_softc *)context; 2258 2259 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2260 2261 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2262 2263 return_VALUE (ACPI_INTERRUPT_HANDLED); 2264} 2265 2266UINT32 2267acpi_event_power_button_wake(void *context) 2268{ 2269 struct acpi_softc *sc = (struct acpi_softc *)context; 2270 2271 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2272 2273 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2274 2275 return_VALUE (ACPI_INTERRUPT_HANDLED); 2276} 2277 2278UINT32 2279acpi_event_sleep_button_sleep(void *context) 2280{ 2281 struct acpi_softc *sc = (struct acpi_softc *)context; 2282 2283 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2284 2285 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2286 2287 return_VALUE (ACPI_INTERRUPT_HANDLED); 2288} 2289 2290UINT32 2291acpi_event_sleep_button_wake(void *context) 2292{ 2293 struct acpi_softc *sc = (struct acpi_softc *)context; 2294 2295 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2296 2297 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2298 2299 return_VALUE (ACPI_INTERRUPT_HANDLED); 2300} 2301 2302/* 2303 * XXX This is kinda ugly, and should not be here. 2304 */ 2305struct acpi_staticbuf { 2306 ACPI_BUFFER buffer; 2307 char data[512]; 2308}; 2309 2310char * 2311acpi_name(ACPI_HANDLE handle) 2312{ 2313 static struct acpi_staticbuf buf; 2314 2315 ACPI_ASSERTLOCK; 2316 2317 buf.buffer.Length = 512; 2318 buf.buffer.Pointer = &buf.data[0]; 2319 2320 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer))) 2321 return (buf.buffer.Pointer); 2322 2323 return ("(unknown path)"); 2324} 2325 2326/* 2327 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2328 * parts of the namespace. 2329 */ 2330int 2331acpi_avoid(ACPI_HANDLE handle) 2332{ 2333 char *cp, *env, *np; 2334 int len; 2335 2336 np = acpi_name(handle); 2337 if (*np == '\\') 2338 np++; 2339 if ((env = getenv("debug.acpi.avoid")) == NULL) 2340 return (0); 2341 2342 /* Scan the avoid list checking for a match */ 2343 cp = env; 2344 for (;;) { 2345 while ((*cp != 0) && isspace(*cp)) 2346 cp++; 2347 if (*cp == 0) 2348 break; 2349 len = 0; 2350 while ((cp[len] != 0) && !isspace(cp[len])) 2351 len++; 2352 if (!strncmp(cp, np, len)) { 2353 freeenv(env); 2354 return(1); 2355 } 2356 cp += len; 2357 } 2358 freeenv(env); 2359 2360 return (0); 2361} 2362 2363/* 2364 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2365 */ 2366int 2367acpi_disabled(char *subsys) 2368{ 2369 char *cp, *env; 2370 int len; 2371 2372 if ((env = getenv("debug.acpi.disabled")) == NULL) 2373 return (0); 2374 if (strcmp(env, "all") == 0) { 2375 freeenv(env); 2376 return (1); 2377 } 2378 2379 /* Scan the disable list, checking for a match. */ 2380 cp = env; 2381 for (;;) { 2382 while (*cp != '\0' && isspace(*cp)) 2383 cp++; 2384 if (*cp == '\0') 2385 break; 2386 len = 0; 2387 while (cp[len] != '\0' && !isspace(cp[len])) 2388 len++; 2389 if (strncmp(cp, subsys, len) == 0) { 2390 freeenv(env); 2391 return (1); 2392 } 2393 cp += len; 2394 } 2395 freeenv(env); 2396 2397 return (0); 2398} 2399 2400/* 2401 * Control interface. 2402 * 2403 * We multiplex ioctls for all participating ACPI devices here. Individual 2404 * drivers wanting to be accessible via /dev/acpi should use the 2405 * register/deregister interface to make their handlers visible. 2406 */ 2407struct acpi_ioctl_hook 2408{ 2409 TAILQ_ENTRY(acpi_ioctl_hook) link; 2410 u_long cmd; 2411 acpi_ioctl_fn fn; 2412 void *arg; 2413}; 2414 2415static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2416static int acpi_ioctl_hooks_initted; 2417 2418/* 2419 * Register an ioctl handler. 2420 */ 2421int 2422acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2423{ 2424 struct acpi_ioctl_hook *hp; 2425 2426 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2427 return (ENOMEM); 2428 hp->cmd = cmd; 2429 hp->fn = fn; 2430 hp->arg = arg; 2431 if (acpi_ioctl_hooks_initted == 0) { 2432 TAILQ_INIT(&acpi_ioctl_hooks); 2433 acpi_ioctl_hooks_initted = 1; 2434 } 2435 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2436 return (0); 2437} 2438 2439/* 2440 * Deregister an ioctl handler. 2441 */ 2442void 2443acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2444{ 2445 struct acpi_ioctl_hook *hp; 2446 2447 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2448 if ((hp->cmd == cmd) && (hp->fn == fn)) 2449 break; 2450 2451 if (hp != NULL) { 2452 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2453 free(hp, M_ACPIDEV); 2454 } 2455} 2456 2457static int 2458acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td) 2459{ 2460 return (0); 2461} 2462 2463static int 2464acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td) 2465{ 2466 return (0); 2467} 2468 2469static int 2470acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2471{ 2472 struct acpi_softc *sc; 2473 struct acpi_ioctl_hook *hp; 2474 int error, xerror, state; 2475 ACPI_LOCK_DECL; 2476 2477 ACPI_LOCK; 2478 2479 error = state = 0; 2480 sc = dev->si_drv1; 2481 2482 /* 2483 * Scan the list of registered ioctls, looking for handlers. 2484 */ 2485 if (acpi_ioctl_hooks_initted) { 2486 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2487 if (hp->cmd == cmd) { 2488 xerror = hp->fn(cmd, addr, hp->arg); 2489 if (xerror != 0) 2490 error = xerror; 2491 goto out; 2492 } 2493 } 2494 } 2495 2496 /* 2497 * Core ioctls are not permitted for non-writable user. 2498 * Currently, other ioctls just fetch information. 2499 * Not changing system behavior. 2500 */ 2501 if((flag & FWRITE) == 0) 2502 return (EPERM); 2503 2504 /* Core system ioctls. */ 2505 switch (cmd) { 2506 case ACPIIO_ENABLE: 2507 if (ACPI_FAILURE(acpi_Enable(sc))) 2508 error = ENXIO; 2509 break; 2510 case ACPIIO_DISABLE: 2511 if (ACPI_FAILURE(acpi_Disable(sc))) 2512 error = ENXIO; 2513 break; 2514 case ACPIIO_SETSLPSTATE: 2515 if (!sc->acpi_enabled) { 2516 error = ENXIO; 2517 break; 2518 } 2519 state = *(int *)addr; 2520 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 2521 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 2522 error = EINVAL; 2523 } else { 2524 error = EINVAL; 2525 } 2526 break; 2527 default: 2528 if (error == 0) 2529 error = EINVAL; 2530 break; 2531 } 2532 2533out: 2534 ACPI_UNLOCK; 2535 return (error); 2536} 2537 2538static int 2539acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2540{ 2541 char sleep_state[4]; 2542 char buf[16]; 2543 int error; 2544 UINT8 state, TypeA, TypeB; 2545 2546 buf[0] = '\0'; 2547 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) { 2548 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 2549 sprintf(sleep_state, "S%d ", state); 2550 strcat(buf, sleep_state); 2551 } 2552 } 2553 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 2554 return (error); 2555} 2556 2557static int 2558acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2559{ 2560 char sleep_state[10]; 2561 int error; 2562 u_int new_state, old_state; 2563 2564 old_state = *(u_int *)oidp->oid_arg1; 2565 if (old_state > ACPI_S_STATES_MAX + 1) { 2566 strcpy(sleep_state, "unknown"); 2567 } else { 2568 bzero(sleep_state, sizeof(sleep_state)); 2569 strncpy(sleep_state, sleep_state_names[old_state], 2570 sizeof(sleep_state_names[old_state])); 2571 } 2572 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2573 if (error == 0 && req->newptr != NULL) { 2574 new_state = ACPI_STATE_S0; 2575 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) { 2576 if (strncmp(sleep_state, sleep_state_names[new_state], 2577 sizeof(sleep_state)) == 0) 2578 break; 2579 } 2580 if (new_state <= ACPI_S_STATES_MAX + 1) { 2581 if (new_state != old_state) 2582 *(u_int *)oidp->oid_arg1 = new_state; 2583 } else { 2584 error = EINVAL; 2585 } 2586 } 2587 2588 return (error); 2589} 2590 2591/* Inform devctl(4) when we receive a Notify. */ 2592void 2593acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 2594{ 2595 char notify_buf[16]; 2596 ACPI_BUFFER handle_buf; 2597 ACPI_STATUS status; 2598 2599 if (subsystem == NULL) 2600 return; 2601 2602 handle_buf.Pointer = NULL; 2603 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 2604 status = AcpiNsHandleToPathname(h, &handle_buf); 2605 if (ACPI_FAILURE(status)) 2606 return; 2607 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 2608 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 2609 AcpiOsFree(handle_buf.Pointer); 2610} 2611 2612#ifdef ACPI_DEBUG 2613/* 2614 * Support for parsing debug options from the kernel environment. 2615 * 2616 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2617 * by specifying the names of the bits in the debug.acpi.layer and 2618 * debug.acpi.level environment variables. Bits may be unset by 2619 * prefixing the bit name with !. 2620 */ 2621struct debugtag 2622{ 2623 char *name; 2624 UINT32 value; 2625}; 2626 2627static struct debugtag dbg_layer[] = { 2628 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2629 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2630 {"ACPI_EVENTS", ACPI_EVENTS}, 2631 {"ACPI_TABLES", ACPI_TABLES}, 2632 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2633 {"ACPI_PARSER", ACPI_PARSER}, 2634 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2635 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2636 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2637 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2638 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2639 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2640 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2641 2642 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2643 {"ACPI_BATTERY", ACPI_BATTERY}, 2644 {"ACPI_BUS", ACPI_BUS}, 2645 {"ACPI_BUTTON", ACPI_BUTTON}, 2646 {"ACPI_EC", ACPI_EC}, 2647 {"ACPI_FAN", ACPI_FAN}, 2648 {"ACPI_POWERRES", ACPI_POWERRES}, 2649 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2650 {"ACPI_THERMAL", ACPI_THERMAL}, 2651 {"ACPI_TIMER", ACPI_TIMER}, 2652 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2653 {NULL, 0} 2654}; 2655 2656static struct debugtag dbg_level[] = { 2657 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2658 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2659 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2660 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2661 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2662 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2663 2664 /* Trace verbosity level 1 [Standard Trace Level] */ 2665 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2666 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2667 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2668 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2669 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2670 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2671 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2672 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2673 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2674 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2675 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2676 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2677 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2678 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2679 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2680 2681 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2682 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2683 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2684 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2685 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2686 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2687 2688 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2689 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2690 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2691 {"ACPI_LV_IO", ACPI_LV_IO}, 2692 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2693 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2694 2695 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2696 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2697 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2698 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2699 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2700 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2701 {NULL, 0} 2702}; 2703 2704static void 2705acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2706{ 2707 char *ep; 2708 int i, l; 2709 int set; 2710 2711 while (*cp) { 2712 if (isspace(*cp)) { 2713 cp++; 2714 continue; 2715 } 2716 ep = cp; 2717 while (*ep && !isspace(*ep)) 2718 ep++; 2719 if (*cp == '!') { 2720 set = 0; 2721 cp++; 2722 if (cp == ep) 2723 continue; 2724 } else { 2725 set = 1; 2726 } 2727 l = ep - cp; 2728 for (i = 0; tag[i].name != NULL; i++) { 2729 if (!strncmp(cp, tag[i].name, l)) { 2730 if (set) 2731 *flag |= tag[i].value; 2732 else 2733 *flag &= ~tag[i].value; 2734 } 2735 } 2736 cp = ep; 2737 } 2738} 2739 2740static void 2741acpi_set_debugging(void *junk) 2742{ 2743 char *layer, *level; 2744 2745 if (cold) { 2746 AcpiDbgLayer = 0; 2747 AcpiDbgLevel = 0; 2748 } 2749 2750 layer = getenv("debug.acpi.layer"); 2751 level = getenv("debug.acpi.level"); 2752 if (layer == NULL && level == NULL) 2753 return; 2754 2755 printf("ACPI set debug"); 2756 if (layer != NULL) { 2757 if (strcmp("NONE", layer) != 0) 2758 printf(" layer '%s'", layer); 2759 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 2760 freeenv(layer); 2761 } 2762 if (level != NULL) { 2763 if (strcmp("NONE", level) != 0) 2764 printf(" level '%s'", level); 2765 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 2766 freeenv(level); 2767 } 2768 printf("\n"); 2769} 2770SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 2771 NULL); 2772 2773static int 2774acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 2775{ 2776 int error, *dbg; 2777 struct debugtag *tag; 2778 struct sbuf sb; 2779 2780 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 2781 return (ENOMEM); 2782 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 2783 tag = &dbg_layer[0]; 2784 dbg = &AcpiDbgLayer; 2785 } else { 2786 tag = &dbg_level[0]; 2787 dbg = &AcpiDbgLevel; 2788 } 2789 2790 /* Get old values if this is a get request. */ 2791 if (*dbg == 0) { 2792 sbuf_cpy(&sb, "NONE"); 2793 } else if (req->newptr == NULL) { 2794 for (; tag->name != NULL; tag++) { 2795 if ((*dbg & tag->value) == tag->value) 2796 sbuf_printf(&sb, "%s ", tag->name); 2797 } 2798 } 2799 sbuf_trim(&sb); 2800 sbuf_finish(&sb); 2801 2802 /* Copy out the old values to the user. */ 2803 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 2804 sbuf_delete(&sb); 2805 2806 /* If the user is setting a string, parse it. */ 2807 if (error == 0 && req->newptr != NULL) { 2808 *dbg = 0; 2809 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 2810 acpi_set_debugging(NULL); 2811 } 2812 2813 return (error); 2814} 2815SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 2816 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 2817SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 2818 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 2819#endif 2820 2821static int 2822acpi_pm_func(u_long cmd, void *arg, ...) 2823{ 2824 int state, acpi_state; 2825 int error; 2826 struct acpi_softc *sc; 2827 va_list ap; 2828 2829 error = 0; 2830 switch (cmd) { 2831 case POWER_CMD_SUSPEND: 2832 sc = (struct acpi_softc *)arg; 2833 if (sc == NULL) { 2834 error = EINVAL; 2835 goto out; 2836 } 2837 2838 va_start(ap, arg); 2839 state = va_arg(ap, int); 2840 va_end(ap); 2841 2842 switch (state) { 2843 case POWER_SLEEP_STATE_STANDBY: 2844 acpi_state = sc->acpi_standby_sx; 2845 break; 2846 case POWER_SLEEP_STATE_SUSPEND: 2847 acpi_state = sc->acpi_suspend_sx; 2848 break; 2849 case POWER_SLEEP_STATE_HIBERNATE: 2850 acpi_state = ACPI_STATE_S4; 2851 break; 2852 default: 2853 error = EINVAL; 2854 goto out; 2855 } 2856 2857 acpi_SetSleepState(sc, acpi_state); 2858 break; 2859 default: 2860 error = EINVAL; 2861 goto out; 2862 } 2863 2864out: 2865 return (error); 2866} 2867 2868static void 2869acpi_pm_register(void *arg) 2870{ 2871 if (!cold || resource_disabled("acpi", 0)) 2872 return; 2873 2874 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 2875} 2876 2877SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 2878