acpi.c revision 159476
1/*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#include <sys/cdefs.h> 31__FBSDID("$FreeBSD: head/sys/dev/acpica/acpi.c 159476 2006-06-10 08:04:38Z njl $"); 32 33#include "opt_acpi.h" 34#include <sys/param.h> 35#include <sys/kernel.h> 36#include <sys/proc.h> 37#include <sys/fcntl.h> 38#include <sys/malloc.h> 39#include <sys/module.h> 40#include <sys/bus.h> 41#include <sys/conf.h> 42#include <sys/ioccom.h> 43#include <sys/reboot.h> 44#include <sys/sysctl.h> 45#include <sys/ctype.h> 46#include <sys/linker.h> 47#include <sys/power.h> 48#include <sys/sbuf.h> 49#include <sys/smp.h> 50 51#include <machine/resource.h> 52#include <machine/bus.h> 53#include <sys/rman.h> 54#include <isa/isavar.h> 55#include <isa/pnpvar.h> 56 57#include <contrib/dev/acpica/acpi.h> 58#include <dev/acpica/acpivar.h> 59#include <dev/acpica/acpiio.h> 60#include <contrib/dev/acpica/achware.h> 61#include <contrib/dev/acpica/acnamesp.h> 62 63#include "pci_if.h" 64#include <dev/pci/pcivar.h> 65#include <dev/pci/pci_private.h> 66 67MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 68 69/* Hooks for the ACPI CA debugging infrastructure */ 70#define _COMPONENT ACPI_BUS 71ACPI_MODULE_NAME("ACPI") 72 73static d_open_t acpiopen; 74static d_close_t acpiclose; 75static d_ioctl_t acpiioctl; 76 77static struct cdevsw acpi_cdevsw = { 78 .d_version = D_VERSION, 79 .d_open = acpiopen, 80 .d_close = acpiclose, 81 .d_ioctl = acpiioctl, 82 .d_name = "acpi", 83}; 84 85/* Global mutex for locking access to the ACPI subsystem. */ 86struct mtx acpi_mutex; 87 88/* Bitmap of device quirks. */ 89int acpi_quirks; 90 91static int acpi_modevent(struct module *mod, int event, void *junk); 92static void acpi_identify(driver_t *driver, device_t parent); 93static int acpi_probe(device_t dev); 94static int acpi_attach(device_t dev); 95static int acpi_suspend(device_t dev); 96static int acpi_resume(device_t dev); 97static int acpi_shutdown(device_t dev); 98static device_t acpi_add_child(device_t bus, int order, const char *name, 99 int unit); 100static int acpi_print_child(device_t bus, device_t child); 101static void acpi_probe_nomatch(device_t bus, device_t child); 102static void acpi_driver_added(device_t dev, driver_t *driver); 103static int acpi_read_ivar(device_t dev, device_t child, int index, 104 uintptr_t *result); 105static int acpi_write_ivar(device_t dev, device_t child, int index, 106 uintptr_t value); 107static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 108static int acpi_sysres_alloc(device_t dev); 109static struct resource_list_entry *acpi_sysres_find(device_t dev, int type, 110 u_long addr); 111static struct resource *acpi_alloc_resource(device_t bus, device_t child, 112 int type, int *rid, u_long start, u_long end, 113 u_long count, u_int flags); 114static int acpi_release_resource(device_t bus, device_t child, int type, 115 int rid, struct resource *r); 116static void acpi_delete_resource(device_t bus, device_t child, int type, 117 int rid); 118static uint32_t acpi_isa_get_logicalid(device_t dev); 119static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 120static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 121static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 122 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 123 ACPI_BUFFER *ret); 124static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 125 int *dstate); 126static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 127 void *context, void **retval); 128static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 129 int max_depth, acpi_scan_cb_t user_fn, void *arg); 130static int acpi_set_powerstate_method(device_t bus, device_t child, 131 int state); 132static int acpi_isa_pnp_probe(device_t bus, device_t child, 133 struct isa_pnp_id *ids); 134static void acpi_probe_children(device_t bus); 135static int acpi_probe_order(ACPI_HANDLE handle, int *order); 136static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 137 void *context, void **status); 138static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid); 139static void acpi_shutdown_final(void *arg, int howto); 140static void acpi_enable_fixed_events(struct acpi_softc *sc); 141static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 142static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 143static int acpi_wake_prep_walk(int sstate); 144static int acpi_wake_sysctl_walk(device_t dev); 145static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 146static void acpi_system_eventhandler_sleep(void *arg, int state); 147static void acpi_system_eventhandler_wakeup(void *arg, int state); 148static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 149static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 150static int acpi_pm_func(u_long cmd, void *arg, ...); 151static int acpi_child_location_str_method(device_t acdev, device_t child, 152 char *buf, size_t buflen); 153static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 154 char *buf, size_t buflen); 155 156static device_method_t acpi_methods[] = { 157 /* Device interface */ 158 DEVMETHOD(device_identify, acpi_identify), 159 DEVMETHOD(device_probe, acpi_probe), 160 DEVMETHOD(device_attach, acpi_attach), 161 DEVMETHOD(device_shutdown, acpi_shutdown), 162 DEVMETHOD(device_detach, bus_generic_detach), 163 DEVMETHOD(device_suspend, acpi_suspend), 164 DEVMETHOD(device_resume, acpi_resume), 165 166 /* Bus interface */ 167 DEVMETHOD(bus_add_child, acpi_add_child), 168 DEVMETHOD(bus_print_child, acpi_print_child), 169 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 170 DEVMETHOD(bus_driver_added, acpi_driver_added), 171 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 172 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 173 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 174 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 175 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 176 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 177 DEVMETHOD(bus_release_resource, acpi_release_resource), 178 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 179 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 180 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 181 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 182 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 183 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 184 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 185 186 /* ACPI bus */ 187 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 188 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 189 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 190 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 191 192 /* PCI emulation */ 193 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 194 195 /* ISA emulation */ 196 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 197 198 {0, 0} 199}; 200 201static driver_t acpi_driver = { 202 "acpi", 203 acpi_methods, 204 sizeof(struct acpi_softc), 205}; 206 207static devclass_t acpi_devclass; 208DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 209MODULE_VERSION(acpi, 1); 210 211ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 212 213/* Local pools for managing system resources for ACPI child devices. */ 214static struct rman acpi_rman_io, acpi_rman_mem; 215 216#define ACPI_MINIMUM_AWAKETIME 5 217 218static const char* sleep_state_names[] = { 219 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 220 221SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 222static char acpi_ca_version[12]; 223SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 224 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 225 226/* 227 * Allow override of whether methods execute in parallel or not. 228 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 229 * errors for AML that really can't handle parallel method execution. 230 * It is off by default since this breaks recursive methods and 231 * some IBMs use such code. 232 */ 233static int acpi_serialize_methods; 234TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 235 236/* Power devices off and on in suspend and resume. XXX Remove once tested. */ 237static int acpi_do_powerstate = 1; 238TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 239SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 240 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 241 242/* Allow users to override quirks. */ 243TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 244 245/* 246 * ACPI can only be loaded as a module by the loader; activating it after 247 * system bootstrap time is not useful, and can be fatal to the system. 248 * It also cannot be unloaded, since the entire system bus heirarchy hangs 249 * off it. 250 */ 251static int 252acpi_modevent(struct module *mod, int event, void *junk) 253{ 254 switch (event) { 255 case MOD_LOAD: 256 if (!cold) { 257 printf("The ACPI driver cannot be loaded after boot.\n"); 258 return (EPERM); 259 } 260 break; 261 case MOD_UNLOAD: 262 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 263 return (EBUSY); 264 break; 265 default: 266 break; 267 } 268 return (0); 269} 270 271/* 272 * Perform early initialization. 273 */ 274ACPI_STATUS 275acpi_Startup(void) 276{ 277 static int started = 0; 278 int error, val; 279 280 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 281 282 /* Only run the startup code once. The MADT driver also calls this. */ 283 if (started) 284 return_VALUE (0); 285 started = 1; 286 287 /* Initialise the ACPI mutex */ 288 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 289 290 /* 291 * Set the globals from our tunables. This is needed because ACPI-CA 292 * uses UINT8 for some values and we have no tunable_byte. 293 */ 294 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 295 AcpiGbl_EnableInterpreterSlack = TRUE; 296 297 /* Start up the ACPI CA subsystem. */ 298 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 299 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 300 return_VALUE (error); 301 } 302 303 if (ACPI_FAILURE(error = AcpiLoadTables())) { 304 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 305 AcpiTerminate(); 306 return_VALUE (error); 307 } 308 309 /* Set up any quirks we have for this system. */ 310 if (acpi_quirks == 0) 311 acpi_table_quirks(&acpi_quirks); 312 313 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 314 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 315 acpi_quirks &= ~ACPI_Q_BROKEN; 316 if (acpi_quirks & ACPI_Q_BROKEN) { 317 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 318 AcpiTerminate(); 319 return_VALUE (AE_ERROR); 320 } 321 322 return_VALUE (AE_OK); 323} 324 325/* 326 * Detect ACPI, perform early initialisation 327 */ 328static void 329acpi_identify(driver_t *driver, device_t parent) 330{ 331 device_t child; 332 333 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 334 335 if (!cold) 336 return_VOID; 337 338 /* Check that we haven't been disabled with a hint. */ 339 if (resource_disabled("acpi", 0)) 340 return_VOID; 341 342 /* Make sure we're not being doubly invoked. */ 343 if (device_find_child(parent, "acpi", 0) != NULL) 344 return_VOID; 345 346 /* Initialize ACPI-CA. */ 347 if (ACPI_FAILURE(acpi_Startup())) 348 return_VOID; 349 350 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION); 351 352 /* Attach the actual ACPI device. */ 353 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 354 device_printf(parent, "device_identify failed\n"); 355 return_VOID; 356 } 357} 358 359/* 360 * Fetch some descriptive data from ACPI to put in our attach message. 361 */ 362static int 363acpi_probe(device_t dev) 364{ 365 ACPI_TABLE_HEADER th; 366 char buf[20]; 367 int error; 368 struct sbuf sb; 369 ACPI_STATUS status; 370 371 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 372 373 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 374 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 375 device_printf(dev, "probe failed, other PM system enabled.\n"); 376 return_VALUE (ENXIO); 377 } 378 379 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 380 device_printf(dev, "couldn't get XSDT header: %s\n", 381 AcpiFormatException(status)); 382 error = ENXIO; 383 } else { 384 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 385 sbuf_bcat(&sb, th.OemId, 6); 386 sbuf_trim(&sb); 387 sbuf_putc(&sb, ' '); 388 sbuf_bcat(&sb, th.OemTableId, 8); 389 sbuf_trim(&sb); 390 sbuf_finish(&sb); 391 device_set_desc_copy(dev, sbuf_data(&sb)); 392 sbuf_delete(&sb); 393 error = 0; 394 } 395 396 return_VALUE (error); 397} 398 399static int 400acpi_attach(device_t dev) 401{ 402 struct acpi_softc *sc; 403 ACPI_STATUS status; 404 int error, state; 405 UINT32 flags; 406 UINT8 TypeA, TypeB; 407 char *env; 408 409 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 410 411 sc = device_get_softc(dev); 412 sc->acpi_dev = dev; 413 414 /* Initialize resource manager. */ 415 acpi_rman_io.rm_type = RMAN_ARRAY; 416 acpi_rman_io.rm_start = 0; 417 acpi_rman_io.rm_end = 0xffff; 418 acpi_rman_io.rm_descr = "I/O ports"; 419 if (rman_init(&acpi_rman_io) != 0) 420 panic("acpi rman_init IO ports failed"); 421 acpi_rman_mem.rm_type = RMAN_ARRAY; 422 acpi_rman_mem.rm_start = 0; 423 acpi_rman_mem.rm_end = ~0ul; 424 acpi_rman_mem.rm_descr = "I/O memory addresses"; 425 if (rman_init(&acpi_rman_mem) != 0) 426 panic("acpi rman_init memory failed"); 427 428 /* Install the default address space handlers. */ 429 error = ENXIO; 430 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 431 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 432 if (ACPI_FAILURE(status)) { 433 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 434 AcpiFormatException(status)); 435 goto out; 436 } 437 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 438 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 439 if (ACPI_FAILURE(status)) { 440 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 441 AcpiFormatException(status)); 442 goto out; 443 } 444 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 445 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 446 if (ACPI_FAILURE(status)) { 447 device_printf(dev, "could not initialise PciConfig handler: %s\n", 448 AcpiFormatException(status)); 449 goto out; 450 } 451 452 /* 453 * Note that some systems (specifically, those with namespace evaluation 454 * issues that require the avoidance of parts of the namespace) must 455 * avoid running _INI and _STA on everything, as well as dodging the final 456 * object init pass. 457 * 458 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 459 * 460 * XXX We should arrange for the object init pass after we have attached 461 * all our child devices, but on many systems it works here. 462 */ 463 flags = 0; 464 if (testenv("debug.acpi.avoid")) 465 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 466 467 /* Bring the hardware and basic handlers online. */ 468 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 469 device_printf(dev, "Could not enable ACPI: %s\n", 470 AcpiFormatException(status)); 471 goto out; 472 } 473 474 /* 475 * Call the ECDT probe function to provide EC functionality before 476 * the namespace has been evaluated. 477 * 478 * XXX This happens before the sysresource devices have been probed and 479 * attached so its resources come from nexus0. In practice, this isn't 480 * a problem but should be addressed eventually. 481 */ 482 acpi_ec_ecdt_probe(dev); 483 484 /* Bring device objects and regions online. */ 485 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 486 device_printf(dev, "Could not initialize ACPI objects: %s\n", 487 AcpiFormatException(status)); 488 goto out; 489 } 490 491 /* 492 * Setup our sysctl tree. 493 * 494 * XXX: This doesn't check to make sure that none of these fail. 495 */ 496 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 497 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 498 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 499 device_get_name(dev), CTLFLAG_RD, 0, ""); 500 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 501 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 502 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 503 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 504 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 505 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 506 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 507 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 508 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 509 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 510 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 511 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 512 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 513 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 514 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 515 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 516 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 517 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 518 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 519 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 520 "sleep delay"); 521 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 522 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 523 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 524 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 525 526 /* 527 * Default to 1 second before sleeping to give some machines time to 528 * stabilize. 529 */ 530 sc->acpi_sleep_delay = 1; 531 if (bootverbose) 532 sc->acpi_verbose = 1; 533 if ((env = getenv("hw.acpi.verbose")) != NULL) { 534 if (strcmp(env, "0") != 0) 535 sc->acpi_verbose = 1; 536 freeenv(env); 537 } 538 539 /* Only enable S4BIOS by default if the FACS says it is available. */ 540 if (AcpiGbl_FACS->S4Bios_f != 0) 541 sc->acpi_s4bios = 1; 542 543 /* 544 * Dispatch the default sleep state to devices. The lid switch is set 545 * to NONE by default to avoid surprising users. 546 */ 547 sc->acpi_power_button_sx = ACPI_STATE_S5; 548 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 549 sc->acpi_standby_sx = ACPI_STATE_S1; 550 sc->acpi_suspend_sx = ACPI_STATE_S3; 551 552 /* Pick the first valid sleep state for the sleep button default. */ 553 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 554 for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++) 555 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 556 sc->acpi_sleep_button_sx = state; 557 break; 558 } 559 560 acpi_enable_fixed_events(sc); 561 562 /* 563 * Scan the namespace and attach/initialise children. 564 */ 565 566 /* Register our shutdown handler. */ 567 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 568 SHUTDOWN_PRI_LAST); 569 570 /* 571 * Register our acpi event handlers. 572 * XXX should be configurable eg. via userland policy manager. 573 */ 574 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 575 sc, ACPI_EVENT_PRI_LAST); 576 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 577 sc, ACPI_EVENT_PRI_LAST); 578 579 /* Flag our initial states. */ 580 sc->acpi_enabled = 1; 581 sc->acpi_sstate = ACPI_STATE_S0; 582 sc->acpi_sleep_disabled = 0; 583 584 /* Create the control device */ 585 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 586 "acpi"); 587 sc->acpi_dev_t->si_drv1 = sc; 588 589 if ((error = acpi_machdep_init(dev))) 590 goto out; 591 592 /* Register ACPI again to pass the correct argument of pm_func. */ 593 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 594 595 if (!acpi_disabled("bus")) 596 acpi_probe_children(dev); 597 598 error = 0; 599 600 out: 601 return_VALUE (error); 602} 603 604static int 605acpi_suspend(device_t dev) 606{ 607 device_t child, *devlist; 608 int error, i, numdevs, pstate; 609 610 GIANT_REQUIRED; 611 612 /* First give child devices a chance to suspend. */ 613 error = bus_generic_suspend(dev); 614 if (error) 615 return (error); 616 617 /* 618 * Now, set them into the appropriate power state, usually D3. If the 619 * device has an _SxD method for the next sleep state, use that power 620 * state instead. 621 */ 622 device_get_children(dev, &devlist, &numdevs); 623 for (i = 0; i < numdevs; i++) { 624 /* If the device is not attached, we've powered it down elsewhere. */ 625 child = devlist[i]; 626 if (!device_is_attached(child)) 627 continue; 628 629 /* 630 * Default to D3 for all sleep states. The _SxD method is optional 631 * so set the powerstate even if it's absent. 632 */ 633 pstate = PCI_POWERSTATE_D3; 634 error = acpi_device_pwr_for_sleep(device_get_parent(child), 635 child, &pstate); 636 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 637 pci_set_powerstate(child, pstate); 638 } 639 free(devlist, M_TEMP); 640 error = 0; 641 642 return (error); 643} 644 645static int 646acpi_resume(device_t dev) 647{ 648 ACPI_HANDLE handle; 649 int i, numdevs; 650 device_t child, *devlist; 651 652 GIANT_REQUIRED; 653 654 /* 655 * Put all devices in D0 before resuming them. Call _S0D on each one 656 * since some systems expect this. 657 */ 658 device_get_children(dev, &devlist, &numdevs); 659 for (i = 0; i < numdevs; i++) { 660 child = devlist[i]; 661 handle = acpi_get_handle(child); 662 if (handle) 663 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 664 if (device_is_attached(child) && acpi_do_powerstate) 665 pci_set_powerstate(child, PCI_POWERSTATE_D0); 666 } 667 free(devlist, M_TEMP); 668 669 return (bus_generic_resume(dev)); 670} 671 672static int 673acpi_shutdown(device_t dev) 674{ 675 676 GIANT_REQUIRED; 677 678 /* Allow children to shutdown first. */ 679 bus_generic_shutdown(dev); 680 681 /* 682 * Enable any GPEs that are able to power-on the system (i.e., RTC). 683 * Also, disable any that are not valid for this state (most). 684 */ 685 acpi_wake_prep_walk(ACPI_STATE_S5); 686 687 return (0); 688} 689 690/* 691 * Handle a new device being added 692 */ 693static device_t 694acpi_add_child(device_t bus, int order, const char *name, int unit) 695{ 696 struct acpi_device *ad; 697 device_t child; 698 699 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 700 return (NULL); 701 702 resource_list_init(&ad->ad_rl); 703 704 child = device_add_child_ordered(bus, order, name, unit); 705 if (child != NULL) 706 device_set_ivars(child, ad); 707 else 708 free(ad, M_ACPIDEV); 709 return (child); 710} 711 712static int 713acpi_print_child(device_t bus, device_t child) 714{ 715 struct acpi_device *adev = device_get_ivars(child); 716 struct resource_list *rl = &adev->ad_rl; 717 int retval = 0; 718 719 retval += bus_print_child_header(bus, child); 720 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 721 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 722 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 723 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 724 if (device_get_flags(child)) 725 retval += printf(" flags %#x", device_get_flags(child)); 726 retval += bus_print_child_footer(bus, child); 727 728 return (retval); 729} 730 731/* 732 * If this device is an ACPI child but no one claimed it, attempt 733 * to power it off. We'll power it back up when a driver is added. 734 * 735 * XXX Disabled for now since many necessary devices (like fdc and 736 * ATA) don't claim the devices we created for them but still expect 737 * them to be powered up. 738 */ 739static void 740acpi_probe_nomatch(device_t bus, device_t child) 741{ 742 743 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 744} 745 746/* 747 * If a new driver has a chance to probe a child, first power it up. 748 * 749 * XXX Disabled for now (see acpi_probe_nomatch for details). 750 */ 751static void 752acpi_driver_added(device_t dev, driver_t *driver) 753{ 754 device_t child, *devlist; 755 int i, numdevs; 756 757 DEVICE_IDENTIFY(driver, dev); 758 device_get_children(dev, &devlist, &numdevs); 759 for (i = 0; i < numdevs; i++) { 760 child = devlist[i]; 761 if (device_get_state(child) == DS_NOTPRESENT) { 762 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 763 if (device_probe_and_attach(child) != 0) 764 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 765 } 766 } 767 free(devlist, M_TEMP); 768} 769 770/* Location hint for devctl(8) */ 771static int 772acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 773 size_t buflen) 774{ 775 struct acpi_device *dinfo = device_get_ivars(child); 776 777 if (dinfo->ad_handle) 778 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 779 else 780 snprintf(buf, buflen, "unknown"); 781 return (0); 782} 783 784/* PnP information for devctl(8) */ 785static int 786acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 787 size_t buflen) 788{ 789 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 790 ACPI_DEVICE_INFO *adinfo; 791 struct acpi_device *dinfo = device_get_ivars(child); 792 char *end; 793 int error; 794 795 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 796 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 797 if (error) 798 snprintf(buf, buflen, "unknown"); 799 else 800 snprintf(buf, buflen, "_HID=%s _UID=%lu", 801 (adinfo->Valid & ACPI_VALID_HID) ? 802 adinfo->HardwareId.Value : "none", 803 (adinfo->Valid & ACPI_VALID_UID) ? 804 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 805 if (adinfo) 806 AcpiOsFree(adinfo); 807 808 return (0); 809} 810 811/* 812 * Handle per-device ivars 813 */ 814static int 815acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 816{ 817 struct acpi_device *ad; 818 819 if ((ad = device_get_ivars(child)) == NULL) { 820 printf("device has no ivars\n"); 821 return (ENOENT); 822 } 823 824 /* ACPI and ISA compatibility ivars */ 825 switch(index) { 826 case ACPI_IVAR_HANDLE: 827 *(ACPI_HANDLE *)result = ad->ad_handle; 828 break; 829 case ACPI_IVAR_MAGIC: 830 *(int *)result = ad->ad_magic; 831 break; 832 case ACPI_IVAR_PRIVATE: 833 *(void **)result = ad->ad_private; 834 break; 835 case ACPI_IVAR_FLAGS: 836 *(int *)result = ad->ad_flags; 837 break; 838 case ISA_IVAR_VENDORID: 839 case ISA_IVAR_SERIAL: 840 case ISA_IVAR_COMPATID: 841 *(int *)result = -1; 842 break; 843 case ISA_IVAR_LOGICALID: 844 *(int *)result = acpi_isa_get_logicalid(child); 845 break; 846 default: 847 return (ENOENT); 848 } 849 850 return (0); 851} 852 853static int 854acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 855{ 856 struct acpi_device *ad; 857 858 if ((ad = device_get_ivars(child)) == NULL) { 859 printf("device has no ivars\n"); 860 return (ENOENT); 861 } 862 863 switch(index) { 864 case ACPI_IVAR_HANDLE: 865 ad->ad_handle = (ACPI_HANDLE)value; 866 break; 867 case ACPI_IVAR_MAGIC: 868 ad->ad_magic = (int)value; 869 break; 870 case ACPI_IVAR_PRIVATE: 871 ad->ad_private = (void *)value; 872 break; 873 case ACPI_IVAR_FLAGS: 874 ad->ad_flags = (int)value; 875 break; 876 default: 877 panic("bad ivar write request (%d)", index); 878 return (ENOENT); 879 } 880 881 return (0); 882} 883 884/* 885 * Handle child resource allocation/removal 886 */ 887static struct resource_list * 888acpi_get_rlist(device_t dev, device_t child) 889{ 890 struct acpi_device *ad; 891 892 ad = device_get_ivars(child); 893 return (&ad->ad_rl); 894} 895 896/* 897 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 898 * duplicates, we merge any in the sysresource attach routine. 899 */ 900static int 901acpi_sysres_alloc(device_t dev) 902{ 903 struct resource *res; 904 struct resource_list *rl; 905 struct resource_list_entry *rle; 906 struct rman *rm; 907 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 908 device_t *children; 909 int child_count, i; 910 911 /* 912 * Probe/attach any sysresource devices. This would be unnecessary if we 913 * had multi-pass probe/attach. 914 */ 915 if (device_get_children(dev, &children, &child_count) != 0) 916 return (ENXIO); 917 for (i = 0; i < child_count; i++) { 918 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 919 device_probe_and_attach(children[i]); 920 } 921 free(children, M_TEMP); 922 923 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 924 STAILQ_FOREACH(rle, rl, link) { 925 if (rle->res != NULL) { 926 device_printf(dev, "duplicate resource for %lx\n", rle->start); 927 continue; 928 } 929 930 /* Only memory and IO resources are valid here. */ 931 switch (rle->type) { 932 case SYS_RES_IOPORT: 933 rm = &acpi_rman_io; 934 break; 935 case SYS_RES_MEMORY: 936 rm = &acpi_rman_mem; 937 break; 938 default: 939 continue; 940 } 941 942 /* Pre-allocate resource and add to our rman pool. */ 943 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 944 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 945 if (res != NULL) { 946 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 947 rle->res = res; 948 } else 949 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 950 rle->start, rle->count, rle->type); 951 } 952 return (0); 953} 954 955/* Find if we manage a given resource. */ 956static struct resource_list_entry * 957acpi_sysres_find(device_t dev, int type, u_long addr) 958{ 959 struct resource_list *rl; 960 struct resource_list_entry *rle; 961 962 ACPI_SERIAL_ASSERT(acpi); 963 964 /* We only consider IO and memory resources for our pool. */ 965 rle = NULL; 966 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY) 967 goto out; 968 969 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 970 STAILQ_FOREACH(rle, rl, link) { 971 if (type == rle->type && addr >= rle->start && 972 addr < rle->start + rle->count) 973 break; 974 } 975 976out: 977 return (rle); 978} 979 980static struct resource * 981acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 982 u_long start, u_long end, u_long count, u_int flags) 983{ 984 ACPI_RESOURCE ares; 985 struct acpi_device *ad = device_get_ivars(child); 986 struct resource_list *rl = &ad->ad_rl; 987 struct resource_list_entry *rle; 988 struct resource *res; 989 struct rman *rm; 990 991 res = NULL; 992 ACPI_SERIAL_BEGIN(acpi); 993 994 /* 995 * If this is an allocation of the "default" range for a given RID, and 996 * we know what the resources for this device are (i.e., they're on the 997 * child's resource list), use those start/end values. 998 */ 999 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1000 rle = resource_list_find(rl, type, *rid); 1001 if (rle == NULL) 1002 goto out; 1003 start = rle->start; 1004 end = rle->end; 1005 count = rle->count; 1006 } 1007 1008 /* If we don't manage this address, pass the request up to the parent. */ 1009 rle = acpi_sysres_find(bus, type, start); 1010 if (rle == NULL) { 1011 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1012 start, end, count, flags); 1013 } else { 1014 1015 /* We only handle memory and IO resources through rman. */ 1016 switch (type) { 1017 case SYS_RES_IOPORT: 1018 rm = &acpi_rman_io; 1019 break; 1020 case SYS_RES_MEMORY: 1021 rm = &acpi_rman_mem; 1022 break; 1023 default: 1024 panic("acpi_alloc_resource: invalid res type %d", type); 1025 } 1026 1027 /* If we do know it, allocate it from the local pool. */ 1028 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1029 child); 1030 if (res == NULL) 1031 goto out; 1032 1033 /* Copy the bus tag and handle from the pre-allocated resource. */ 1034 rman_set_rid(res, *rid); 1035 rman_set_bustag(res, rman_get_bustag(rle->res)); 1036 rman_set_bushandle(res, rman_get_start(res)); 1037 1038 /* If requested, activate the resource using the parent's method. */ 1039 if (flags & RF_ACTIVE) 1040 if (bus_activate_resource(child, type, *rid, res) != 0) { 1041 rman_release_resource(res); 1042 res = NULL; 1043 goto out; 1044 } 1045 } 1046 1047 if (res != NULL && device_get_parent(child) == bus) 1048 switch (type) { 1049 case SYS_RES_IRQ: 1050 /* 1051 * Since bus_config_intr() takes immediate effect, we cannot 1052 * configure the interrupt associated with a device when we 1053 * parse the resources but have to defer it until a driver 1054 * actually allocates the interrupt via bus_alloc_resource(). 1055 * 1056 * XXX: Should we handle the lookup failing? 1057 */ 1058 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1059 acpi_config_intr(child, &ares); 1060 break; 1061 } 1062 1063out: 1064 ACPI_SERIAL_END(acpi); 1065 return (res); 1066} 1067 1068static int 1069acpi_release_resource(device_t bus, device_t child, int type, int rid, 1070 struct resource *r) 1071{ 1072 int ret; 1073 1074 ACPI_SERIAL_BEGIN(acpi); 1075 1076 /* 1077 * If we know about this address, deactivate it and release it to the 1078 * local pool. If we don't, pass this request up to the parent. 1079 */ 1080 if (acpi_sysres_find(bus, type, rman_get_start(r)) == NULL) { 1081 if (rman_get_flags(r) & RF_ACTIVE) { 1082 ret = bus_deactivate_resource(child, type, rid, r); 1083 if (ret != 0) 1084 goto out; 1085 } 1086 ret = rman_release_resource(r); 1087 } else 1088 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1089 1090out: 1091 ACPI_SERIAL_END(acpi); 1092 return (ret); 1093} 1094 1095static void 1096acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1097{ 1098 struct resource_list *rl; 1099 1100 rl = acpi_get_rlist(bus, child); 1101 resource_list_delete(rl, type, rid); 1102} 1103 1104/* Allocate an IO port or memory resource, given its GAS. */ 1105int 1106acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1107 struct resource **res) 1108{ 1109 int error, res_type; 1110 1111 error = ENOMEM; 1112 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1113 return (EINVAL); 1114 1115 /* We only support memory and IO spaces. */ 1116 switch (gas->AddressSpaceId) { 1117 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1118 res_type = SYS_RES_MEMORY; 1119 break; 1120 case ACPI_ADR_SPACE_SYSTEM_IO: 1121 res_type = SYS_RES_IOPORT; 1122 break; 1123 default: 1124 return (EOPNOTSUPP); 1125 } 1126 1127 /* 1128 * If the register width is less than 8, assume the BIOS author means 1129 * it is a bit field and just allocate a byte. 1130 */ 1131 if (gas->RegisterBitWidth && gas->RegisterBitWidth < 8) 1132 gas->RegisterBitWidth = 8; 1133 1134 /* Validate the address after we're sure we support the space. */ 1135 if (!ACPI_VALID_ADDRESS(gas->Address) || gas->RegisterBitWidth == 0) 1136 return (EINVAL); 1137 1138 bus_set_resource(dev, res_type, *rid, gas->Address, 1139 gas->RegisterBitWidth / 8); 1140 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE); 1141 if (*res != NULL) { 1142 *type = res_type; 1143 error = 0; 1144 } else 1145 bus_delete_resource(dev, res_type, *rid); 1146 1147 return (error); 1148} 1149 1150/* Probe _HID and _CID for compatible ISA PNP ids. */ 1151static uint32_t 1152acpi_isa_get_logicalid(device_t dev) 1153{ 1154 ACPI_DEVICE_INFO *devinfo; 1155 ACPI_BUFFER buf; 1156 ACPI_HANDLE h; 1157 ACPI_STATUS error; 1158 u_int32_t pnpid; 1159 1160 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1161 1162 pnpid = 0; 1163 buf.Pointer = NULL; 1164 buf.Length = ACPI_ALLOCATE_BUFFER; 1165 1166 /* Fetch and validate the HID. */ 1167 if ((h = acpi_get_handle(dev)) == NULL) 1168 goto out; 1169 error = AcpiGetObjectInfo(h, &buf); 1170 if (ACPI_FAILURE(error)) 1171 goto out; 1172 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1173 1174 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1175 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 1176 1177out: 1178 if (buf.Pointer != NULL) 1179 AcpiOsFree(buf.Pointer); 1180 return_VALUE (pnpid); 1181} 1182 1183static int 1184acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1185{ 1186 ACPI_DEVICE_INFO *devinfo; 1187 ACPI_BUFFER buf; 1188 ACPI_HANDLE h; 1189 ACPI_STATUS error; 1190 uint32_t *pnpid; 1191 int valid, i; 1192 1193 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1194 1195 pnpid = cids; 1196 valid = 0; 1197 buf.Pointer = NULL; 1198 buf.Length = ACPI_ALLOCATE_BUFFER; 1199 1200 /* Fetch and validate the CID */ 1201 if ((h = acpi_get_handle(dev)) == NULL) 1202 goto out; 1203 error = AcpiGetObjectInfo(h, &buf); 1204 if (ACPI_FAILURE(error)) 1205 goto out; 1206 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1207 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1208 goto out; 1209 1210 if (devinfo->CompatibilityId.Count < count) 1211 count = devinfo->CompatibilityId.Count; 1212 for (i = 0; i < count; i++) { 1213 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 1214 continue; 1215 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 1216 valid++; 1217 } 1218 1219out: 1220 if (buf.Pointer != NULL) 1221 AcpiOsFree(buf.Pointer); 1222 return_VALUE (valid); 1223} 1224 1225static char * 1226acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1227{ 1228 ACPI_HANDLE h; 1229 int i; 1230 1231 h = acpi_get_handle(dev); 1232 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1233 return (NULL); 1234 1235 /* Try to match one of the array of IDs with a HID or CID. */ 1236 for (i = 0; ids[i] != NULL; i++) { 1237 if (acpi_MatchHid(h, ids[i])) 1238 return (ids[i]); 1239 } 1240 return (NULL); 1241} 1242 1243static ACPI_STATUS 1244acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1245 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1246{ 1247 ACPI_HANDLE h; 1248 1249 if (dev == NULL) 1250 h = ACPI_ROOT_OBJECT; 1251 else if ((h = acpi_get_handle(dev)) == NULL) 1252 return (AE_BAD_PARAMETER); 1253 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1254} 1255 1256static int 1257acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1258{ 1259 struct acpi_softc *sc; 1260 ACPI_HANDLE handle; 1261 ACPI_STATUS status; 1262 char sxd[8]; 1263 int error; 1264 1265 sc = device_get_softc(bus); 1266 handle = acpi_get_handle(dev); 1267 1268 /* 1269 * XXX If we find these devices, don't try to power them down. 1270 * The serial and IRDA ports on my T23 hang the system when 1271 * set to D3 and it appears that such legacy devices may 1272 * need special handling in their drivers. 1273 */ 1274 if (handle == NULL || 1275 acpi_MatchHid(handle, "PNP0500") || 1276 acpi_MatchHid(handle, "PNP0501") || 1277 acpi_MatchHid(handle, "PNP0502") || 1278 acpi_MatchHid(handle, "PNP0510") || 1279 acpi_MatchHid(handle, "PNP0511")) 1280 return (ENXIO); 1281 1282 /* 1283 * Override next state with the value from _SxD, if present. If no 1284 * dstate argument was provided, don't fetch the return value. 1285 */ 1286 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1287 if (dstate) 1288 status = acpi_GetInteger(handle, sxd, dstate); 1289 else 1290 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1291 1292 switch (status) { 1293 case AE_OK: 1294 error = 0; 1295 break; 1296 case AE_NOT_FOUND: 1297 error = ESRCH; 1298 break; 1299 default: 1300 error = ENXIO; 1301 break; 1302 } 1303 1304 return (error); 1305} 1306 1307/* Callback arg for our implementation of walking the namespace. */ 1308struct acpi_device_scan_ctx { 1309 acpi_scan_cb_t user_fn; 1310 void *arg; 1311 ACPI_HANDLE parent; 1312}; 1313 1314static ACPI_STATUS 1315acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1316{ 1317 struct acpi_device_scan_ctx *ctx; 1318 device_t dev, old_dev; 1319 ACPI_STATUS status; 1320 ACPI_OBJECT_TYPE type; 1321 1322 /* 1323 * Skip this device if we think we'll have trouble with it or it is 1324 * the parent where the scan began. 1325 */ 1326 ctx = (struct acpi_device_scan_ctx *)arg; 1327 if (acpi_avoid(h) || h == ctx->parent) 1328 return (AE_OK); 1329 1330 /* If this is not a valid device type (e.g., a method), skip it. */ 1331 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1332 return (AE_OK); 1333 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1334 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1335 return (AE_OK); 1336 1337 /* 1338 * Call the user function with the current device. If it is unchanged 1339 * afterwards, return. Otherwise, we update the handle to the new dev. 1340 */ 1341 old_dev = acpi_get_device(h); 1342 dev = old_dev; 1343 status = ctx->user_fn(h, &dev, level, ctx->arg); 1344 if (ACPI_FAILURE(status) || old_dev == dev) 1345 return (status); 1346 1347 /* Remove the old child and its connection to the handle. */ 1348 if (old_dev != NULL) { 1349 device_delete_child(device_get_parent(old_dev), old_dev); 1350 AcpiDetachData(h, acpi_fake_objhandler); 1351 } 1352 1353 /* Recreate the handle association if the user created a device. */ 1354 if (dev != NULL) 1355 AcpiAttachData(h, acpi_fake_objhandler, dev); 1356 1357 return (AE_OK); 1358} 1359 1360static ACPI_STATUS 1361acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1362 acpi_scan_cb_t user_fn, void *arg) 1363{ 1364 ACPI_HANDLE h; 1365 struct acpi_device_scan_ctx ctx; 1366 1367 if (acpi_disabled("children")) 1368 return (AE_OK); 1369 1370 if (dev == NULL) 1371 h = ACPI_ROOT_OBJECT; 1372 else if ((h = acpi_get_handle(dev)) == NULL) 1373 return (AE_BAD_PARAMETER); 1374 ctx.user_fn = user_fn; 1375 ctx.arg = arg; 1376 ctx.parent = h; 1377 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1378 acpi_device_scan_cb, &ctx, NULL)); 1379} 1380 1381/* 1382 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1383 * device power states since it's close enough to ACPI. 1384 */ 1385static int 1386acpi_set_powerstate_method(device_t bus, device_t child, int state) 1387{ 1388 ACPI_HANDLE h; 1389 ACPI_STATUS status; 1390 int error; 1391 1392 error = 0; 1393 h = acpi_get_handle(child); 1394 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1395 return (EINVAL); 1396 if (h == NULL) 1397 return (0); 1398 1399 /* Ignore errors if the power methods aren't present. */ 1400 status = acpi_pwr_switch_consumer(h, state); 1401 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1402 && status != AE_BAD_PARAMETER) 1403 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1404 state, acpi_name(h), AcpiFormatException(status)); 1405 1406 return (error); 1407} 1408 1409static int 1410acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1411{ 1412 int result, cid_count, i; 1413 uint32_t lid, cids[8]; 1414 1415 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1416 1417 /* 1418 * ISA-style drivers attached to ACPI may persist and 1419 * probe manually if we return ENOENT. We never want 1420 * that to happen, so don't ever return it. 1421 */ 1422 result = ENXIO; 1423 1424 /* Scan the supplied IDs for a match */ 1425 lid = acpi_isa_get_logicalid(child); 1426 cid_count = acpi_isa_get_compatid(child, cids, 8); 1427 while (ids && ids->ip_id) { 1428 if (lid == ids->ip_id) { 1429 result = 0; 1430 goto out; 1431 } 1432 for (i = 0; i < cid_count; i++) { 1433 if (cids[i] == ids->ip_id) { 1434 result = 0; 1435 goto out; 1436 } 1437 } 1438 ids++; 1439 } 1440 1441 out: 1442 if (result == 0 && ids->ip_desc) 1443 device_set_desc(child, ids->ip_desc); 1444 1445 return_VALUE (result); 1446} 1447 1448/* 1449 * Scan all of the ACPI namespace and attach child devices. 1450 * 1451 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1452 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1453 * However, in violation of the spec, some systems place their PCI link 1454 * devices in \, so we have to walk the whole namespace. We check the 1455 * type of namespace nodes, so this should be ok. 1456 */ 1457static void 1458acpi_probe_children(device_t bus) 1459{ 1460 1461 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1462 1463 /* 1464 * Scan the namespace and insert placeholders for all the devices that 1465 * we find. We also probe/attach any early devices. 1466 * 1467 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1468 * we want to create nodes for all devices, not just those that are 1469 * currently present. (This assumes that we don't want to create/remove 1470 * devices as they appear, which might be smarter.) 1471 */ 1472 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1473 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1474 bus, NULL); 1475 1476 /* Pre-allocate resources for our rman from any sysresource devices. */ 1477 acpi_sysres_alloc(bus); 1478 1479 /* Create any static children by calling device identify methods. */ 1480 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1481 bus_generic_probe(bus); 1482 1483 /* Probe/attach all children, created staticly and from the namespace. */ 1484 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1485 bus_generic_attach(bus); 1486 1487 /* 1488 * Some of these children may have attached others as part of their attach 1489 * process (eg. the root PCI bus driver), so rescan. 1490 */ 1491 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1492 bus_generic_attach(bus); 1493 1494 /* Attach wake sysctls. */ 1495 acpi_wake_sysctl_walk(bus); 1496 1497 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1498 return_VOID; 1499} 1500 1501/* 1502 * Determine the probe order for a given device and return non-zero if it 1503 * should be attached immediately. 1504 */ 1505static int 1506acpi_probe_order(ACPI_HANDLE handle, int *order) 1507{ 1508 1509 /* 1510 * 1. I/O port and memory system resource holders 1511 * 2. Embedded controllers (to handle early accesses) 1512 * 3. PCI Link Devices 1513 */ 1514 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1515 *order = 1; 1516 else if (acpi_MatchHid(handle, "PNP0C09")) 1517 *order = 2; 1518 else if (acpi_MatchHid(handle, "PNP0C0F")) 1519 *order = 3; 1520 return (0); 1521} 1522 1523/* 1524 * Evaluate a child device and determine whether we might attach a device to 1525 * it. 1526 */ 1527static ACPI_STATUS 1528acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1529{ 1530 ACPI_OBJECT_TYPE type; 1531 ACPI_HANDLE h; 1532 device_t bus, child; 1533 int order; 1534 char *handle_str, **search; 1535 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL}; 1536 1537 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1538 1539 /* Skip this device if we think we'll have trouble with it. */ 1540 if (acpi_avoid(handle)) 1541 return_ACPI_STATUS (AE_OK); 1542 1543 bus = (device_t)context; 1544 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1545 switch (type) { 1546 case ACPI_TYPE_DEVICE: 1547 case ACPI_TYPE_PROCESSOR: 1548 case ACPI_TYPE_THERMAL: 1549 case ACPI_TYPE_POWER: 1550 if (acpi_disabled("children")) 1551 break; 1552 1553 /* 1554 * Since we scan from \, be sure to skip system scope objects. 1555 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?) 1556 */ 1557 handle_str = acpi_name(handle); 1558 for (search = scopes; *search != NULL; search++) { 1559 if (strcmp(handle_str, *search) == 0) 1560 break; 1561 } 1562 if (*search != NULL) 1563 break; 1564 1565 /* 1566 * Create a placeholder device for this node. Sort the placeholder 1567 * so that the probe/attach passes will run breadth-first. Orders 1568 * less than 10 are reserved for special objects (i.e., system 1569 * resources). Larger values are used for all other devices. 1570 */ 1571 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1572 order = (level + 1) * 10; 1573 acpi_probe_order(handle, &order); 1574 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1575 if (child == NULL) 1576 break; 1577 1578 /* Associate the handle with the device_t and vice versa. */ 1579 acpi_set_handle(child, handle); 1580 AcpiAttachData(handle, acpi_fake_objhandler, child); 1581 1582 /* 1583 * Check that the device is present. If it's not present, 1584 * leave it disabled (so that we have a device_t attached to 1585 * the handle, but we don't probe it). 1586 * 1587 * XXX PCI link devices sometimes report "present" but not 1588 * "functional" (i.e. if disabled). Go ahead and probe them 1589 * anyway since we may enable them later. 1590 */ 1591 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1592 /* Never disable PCI link devices. */ 1593 if (acpi_MatchHid(handle, "PNP0C0F")) 1594 break; 1595 /* 1596 * Docking stations should remain enabled since the system 1597 * may be undocked at boot. 1598 */ 1599 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1600 break; 1601 1602 device_disable(child); 1603 break; 1604 } 1605 1606 /* 1607 * Get the device's resource settings and attach them. 1608 * Note that if the device has _PRS but no _CRS, we need 1609 * to decide when it's appropriate to try to configure the 1610 * device. Ignore the return value here; it's OK for the 1611 * device not to have any resources. 1612 */ 1613 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1614 break; 1615 } 1616 } 1617 1618 return_ACPI_STATUS (AE_OK); 1619} 1620 1621/* 1622 * AcpiAttachData() requires an object handler but never uses it. This is a 1623 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1624 */ 1625void 1626acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data) 1627{ 1628} 1629 1630static void 1631acpi_shutdown_final(void *arg, int howto) 1632{ 1633 ACPI_STATUS status; 1634 1635 /* 1636 * XXX Shutdown code should only run on the BSP (cpuid 0). 1637 * Some chipsets do not power off the system correctly if called from 1638 * an AP. 1639 */ 1640 if ((howto & RB_POWEROFF) != 0) { 1641 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1642 if (ACPI_FAILURE(status)) { 1643 printf("AcpiEnterSleepStatePrep failed - %s\n", 1644 AcpiFormatException(status)); 1645 return; 1646 } 1647 printf("Powering system off using ACPI\n"); 1648 ACPI_DISABLE_IRQS(); 1649 status = AcpiEnterSleepState(ACPI_STATE_S5); 1650 if (ACPI_FAILURE(status)) { 1651 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1652 } else { 1653 DELAY(1000000); 1654 printf("ACPI power-off failed - timeout\n"); 1655 } 1656 } else if ((howto & RB_AUTOBOOT) != 0 && AcpiGbl_FADT->ResetRegSup) { 1657 status = AcpiHwLowLevelWrite( 1658 AcpiGbl_FADT->ResetRegister.RegisterBitWidth, 1659 AcpiGbl_FADT->ResetValue, &AcpiGbl_FADT->ResetRegister); 1660 if (ACPI_FAILURE(status)) { 1661 printf("ACPI reset failed - %s\n", AcpiFormatException(status)); 1662 } else { 1663 DELAY(1000000); 1664 printf("ACPI reset failed - timeout\n"); 1665 } 1666 } else if (panicstr == NULL) { 1667 printf("Shutting down ACPI\n"); 1668 AcpiTerminate(); 1669 } 1670} 1671 1672static void 1673acpi_enable_fixed_events(struct acpi_softc *sc) 1674{ 1675 static int first_time = 1; 1676 1677 /* Enable and clear fixed events and install handlers. */ 1678 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 1679 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1680 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1681 acpi_event_power_button_sleep, sc); 1682 if (first_time) 1683 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1684 } 1685 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 1686 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1687 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1688 acpi_event_sleep_button_sleep, sc); 1689 if (first_time) 1690 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1691 } 1692 1693 first_time = 0; 1694} 1695 1696/* 1697 * Returns true if the device is actually present and should 1698 * be attached to. This requires the present, enabled, UI-visible 1699 * and diagnostics-passed bits to be set. 1700 */ 1701BOOLEAN 1702acpi_DeviceIsPresent(device_t dev) 1703{ 1704 ACPI_DEVICE_INFO *devinfo; 1705 ACPI_HANDLE h; 1706 ACPI_BUFFER buf; 1707 ACPI_STATUS error; 1708 int ret; 1709 1710 ret = FALSE; 1711 if ((h = acpi_get_handle(dev)) == NULL) 1712 return (FALSE); 1713 buf.Pointer = NULL; 1714 buf.Length = ACPI_ALLOCATE_BUFFER; 1715 error = AcpiGetObjectInfo(h, &buf); 1716 if (ACPI_FAILURE(error)) 1717 return (FALSE); 1718 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1719 1720 /* If no _STA method, must be present */ 1721 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1722 ret = TRUE; 1723 1724 /* Return true for 'present' and 'functioning' */ 1725 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1726 ret = TRUE; 1727 1728 AcpiOsFree(buf.Pointer); 1729 return (ret); 1730} 1731 1732/* 1733 * Returns true if the battery is actually present and inserted. 1734 */ 1735BOOLEAN 1736acpi_BatteryIsPresent(device_t dev) 1737{ 1738 ACPI_DEVICE_INFO *devinfo; 1739 ACPI_HANDLE h; 1740 ACPI_BUFFER buf; 1741 ACPI_STATUS error; 1742 int ret; 1743 1744 ret = FALSE; 1745 if ((h = acpi_get_handle(dev)) == NULL) 1746 return (FALSE); 1747 buf.Pointer = NULL; 1748 buf.Length = ACPI_ALLOCATE_BUFFER; 1749 error = AcpiGetObjectInfo(h, &buf); 1750 if (ACPI_FAILURE(error)) 1751 return (FALSE); 1752 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1753 1754 /* If no _STA method, must be present */ 1755 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1756 ret = TRUE; 1757 1758 /* Return true for 'present', 'battery present', and 'functioning' */ 1759 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1760 ret = TRUE; 1761 1762 AcpiOsFree(buf.Pointer); 1763 return (ret); 1764} 1765 1766/* 1767 * Match a HID string against a handle 1768 */ 1769static BOOLEAN 1770acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1771{ 1772 ACPI_DEVICE_INFO *devinfo; 1773 ACPI_BUFFER buf; 1774 ACPI_STATUS error; 1775 int ret, i; 1776 1777 ret = FALSE; 1778 if (hid == NULL || h == NULL) 1779 return (ret); 1780 buf.Pointer = NULL; 1781 buf.Length = ACPI_ALLOCATE_BUFFER; 1782 error = AcpiGetObjectInfo(h, &buf); 1783 if (ACPI_FAILURE(error)) 1784 return (ret); 1785 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1786 1787 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1788 strcmp(hid, devinfo->HardwareId.Value) == 0) 1789 ret = TRUE; 1790 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1791 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1792 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1793 ret = TRUE; 1794 break; 1795 } 1796 } 1797 } 1798 1799 AcpiOsFree(buf.Pointer); 1800 return (ret); 1801} 1802 1803/* 1804 * Return the handle of a named object within our scope, ie. that of (parent) 1805 * or one if its parents. 1806 */ 1807ACPI_STATUS 1808acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1809{ 1810 ACPI_HANDLE r; 1811 ACPI_STATUS status; 1812 1813 /* Walk back up the tree to the root */ 1814 for (;;) { 1815 status = AcpiGetHandle(parent, path, &r); 1816 if (ACPI_SUCCESS(status)) { 1817 *result = r; 1818 return (AE_OK); 1819 } 1820 /* XXX Return error here? */ 1821 if (status != AE_NOT_FOUND) 1822 return (AE_OK); 1823 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1824 return (AE_NOT_FOUND); 1825 parent = r; 1826 } 1827} 1828 1829/* Find the difference between two PM tick counts. */ 1830uint32_t 1831acpi_TimerDelta(uint32_t end, uint32_t start) 1832{ 1833 uint32_t delta; 1834 1835 if (end >= start) 1836 delta = end - start; 1837 else if (AcpiGbl_FADT->TmrValExt == 0) 1838 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 1839 else 1840 delta = ((0xFFFFFFFF - start) + end + 1); 1841 return (delta); 1842} 1843 1844/* 1845 * Allocate a buffer with a preset data size. 1846 */ 1847ACPI_BUFFER * 1848acpi_AllocBuffer(int size) 1849{ 1850 ACPI_BUFFER *buf; 1851 1852 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1853 return (NULL); 1854 buf->Length = size; 1855 buf->Pointer = (void *)(buf + 1); 1856 return (buf); 1857} 1858 1859ACPI_STATUS 1860acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1861{ 1862 ACPI_OBJECT arg1; 1863 ACPI_OBJECT_LIST args; 1864 1865 arg1.Type = ACPI_TYPE_INTEGER; 1866 arg1.Integer.Value = number; 1867 args.Count = 1; 1868 args.Pointer = &arg1; 1869 1870 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1871} 1872 1873/* 1874 * Evaluate a path that should return an integer. 1875 */ 1876ACPI_STATUS 1877acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1878{ 1879 ACPI_STATUS status; 1880 ACPI_BUFFER buf; 1881 ACPI_OBJECT param; 1882 1883 if (handle == NULL) 1884 handle = ACPI_ROOT_OBJECT; 1885 1886 /* 1887 * Assume that what we've been pointed at is an Integer object, or 1888 * a method that will return an Integer. 1889 */ 1890 buf.Pointer = ¶m; 1891 buf.Length = sizeof(param); 1892 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1893 if (ACPI_SUCCESS(status)) { 1894 if (param.Type == ACPI_TYPE_INTEGER) 1895 *number = param.Integer.Value; 1896 else 1897 status = AE_TYPE; 1898 } 1899 1900 /* 1901 * In some applications, a method that's expected to return an Integer 1902 * may instead return a Buffer (probably to simplify some internal 1903 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1904 * convert it into an Integer as best we can. 1905 * 1906 * This is a hack. 1907 */ 1908 if (status == AE_BUFFER_OVERFLOW) { 1909 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1910 status = AE_NO_MEMORY; 1911 } else { 1912 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1913 if (ACPI_SUCCESS(status)) 1914 status = acpi_ConvertBufferToInteger(&buf, number); 1915 AcpiOsFree(buf.Pointer); 1916 } 1917 } 1918 return (status); 1919} 1920 1921ACPI_STATUS 1922acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1923{ 1924 ACPI_OBJECT *p; 1925 UINT8 *val; 1926 int i; 1927 1928 p = (ACPI_OBJECT *)bufp->Pointer; 1929 if (p->Type == ACPI_TYPE_INTEGER) { 1930 *number = p->Integer.Value; 1931 return (AE_OK); 1932 } 1933 if (p->Type != ACPI_TYPE_BUFFER) 1934 return (AE_TYPE); 1935 if (p->Buffer.Length > sizeof(int)) 1936 return (AE_BAD_DATA); 1937 1938 *number = 0; 1939 val = p->Buffer.Pointer; 1940 for (i = 0; i < p->Buffer.Length; i++) 1941 *number += val[i] << (i * 8); 1942 return (AE_OK); 1943} 1944 1945/* 1946 * Iterate over the elements of an a package object, calling the supplied 1947 * function for each element. 1948 * 1949 * XXX possible enhancement might be to abort traversal on error. 1950 */ 1951ACPI_STATUS 1952acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1953 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1954{ 1955 ACPI_OBJECT *comp; 1956 int i; 1957 1958 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1959 return (AE_BAD_PARAMETER); 1960 1961 /* Iterate over components */ 1962 i = 0; 1963 comp = pkg->Package.Elements; 1964 for (; i < pkg->Package.Count; i++, comp++) 1965 func(comp, arg); 1966 1967 return (AE_OK); 1968} 1969 1970/* 1971 * Find the (index)th resource object in a set. 1972 */ 1973ACPI_STATUS 1974acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1975{ 1976 ACPI_RESOURCE *rp; 1977 int i; 1978 1979 rp = (ACPI_RESOURCE *)buf->Pointer; 1980 i = index; 1981 while (i-- > 0) { 1982 /* Range check */ 1983 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1984 return (AE_BAD_PARAMETER); 1985 1986 /* Check for terminator */ 1987 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 1988 return (AE_NOT_FOUND); 1989 rp = ACPI_NEXT_RESOURCE(rp); 1990 } 1991 if (resp != NULL) 1992 *resp = rp; 1993 1994 return (AE_OK); 1995} 1996 1997/* 1998 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1999 * 2000 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2001 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2002 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2003 * resources. 2004 */ 2005#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2006 2007ACPI_STATUS 2008acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2009{ 2010 ACPI_RESOURCE *rp; 2011 void *newp; 2012 2013 /* Initialise the buffer if necessary. */ 2014 if (buf->Pointer == NULL) { 2015 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2016 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2017 return (AE_NO_MEMORY); 2018 rp = (ACPI_RESOURCE *)buf->Pointer; 2019 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2020 rp->Length = 0; 2021 } 2022 if (res == NULL) 2023 return (AE_OK); 2024 2025 /* 2026 * Scan the current buffer looking for the terminator. 2027 * This will either find the terminator or hit the end 2028 * of the buffer and return an error. 2029 */ 2030 rp = (ACPI_RESOURCE *)buf->Pointer; 2031 for (;;) { 2032 /* Range check, don't go outside the buffer */ 2033 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2034 return (AE_BAD_PARAMETER); 2035 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2036 break; 2037 rp = ACPI_NEXT_RESOURCE(rp); 2038 } 2039 2040 /* 2041 * Check the size of the buffer and expand if required. 2042 * 2043 * Required size is: 2044 * size of existing resources before terminator + 2045 * size of new resource and header + 2046 * size of terminator. 2047 * 2048 * Note that this loop should really only run once, unless 2049 * for some reason we are stuffing a *really* huge resource. 2050 */ 2051 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2052 res->Length + ACPI_RS_SIZE_NO_DATA + 2053 ACPI_RS_SIZE_MIN) >= buf->Length) { 2054 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2055 return (AE_NO_MEMORY); 2056 bcopy(buf->Pointer, newp, buf->Length); 2057 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2058 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2059 AcpiOsFree(buf->Pointer); 2060 buf->Pointer = newp; 2061 buf->Length += buf->Length; 2062 } 2063 2064 /* Insert the new resource. */ 2065 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2066 2067 /* And add the terminator. */ 2068 rp = ACPI_NEXT_RESOURCE(rp); 2069 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2070 rp->Length = 0; 2071 2072 return (AE_OK); 2073} 2074 2075/* 2076 * Set interrupt model. 2077 */ 2078ACPI_STATUS 2079acpi_SetIntrModel(int model) 2080{ 2081 2082 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2083} 2084 2085static void 2086acpi_sleep_enable(void *arg) 2087{ 2088 2089 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2090} 2091 2092enum acpi_sleep_state { 2093 ACPI_SS_NONE, 2094 ACPI_SS_GPE_SET, 2095 ACPI_SS_DEV_SUSPEND, 2096 ACPI_SS_SLP_PREP, 2097 ACPI_SS_SLEPT, 2098}; 2099 2100/* 2101 * Set the system sleep state 2102 * 2103 * Currently we support S1-S5 but S4 is only S4BIOS 2104 */ 2105ACPI_STATUS 2106acpi_SetSleepState(struct acpi_softc *sc, int state) 2107{ 2108 ACPI_STATUS status; 2109 UINT8 TypeA; 2110 UINT8 TypeB; 2111 enum acpi_sleep_state slp_state; 2112 2113 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2114 2115 status = AE_OK; 2116 ACPI_LOCK(acpi); 2117 if (sc->acpi_sleep_disabled) { 2118 if (sc->acpi_sstate != ACPI_STATE_S0) 2119 status = AE_ERROR; 2120 ACPI_UNLOCK(acpi); 2121 printf("acpi: suspend request ignored (not ready yet)\n"); 2122 return (status); 2123 } 2124 sc->acpi_sleep_disabled = 1; 2125 ACPI_UNLOCK(acpi); 2126 2127 /* 2128 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2129 * drivers need this. 2130 */ 2131 mtx_lock(&Giant); 2132 slp_state = ACPI_SS_NONE; 2133 switch (state) { 2134 case ACPI_STATE_S1: 2135 case ACPI_STATE_S2: 2136 case ACPI_STATE_S3: 2137 case ACPI_STATE_S4: 2138 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2139 if (status == AE_NOT_FOUND) { 2140 device_printf(sc->acpi_dev, 2141 "Sleep state S%d not supported by BIOS\n", state); 2142 break; 2143 } else if (ACPI_FAILURE(status)) { 2144 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2145 AcpiFormatException(status)); 2146 break; 2147 } 2148 2149 sc->acpi_sstate = state; 2150 2151 /* Enable any GPEs as appropriate and requested by the user. */ 2152 acpi_wake_prep_walk(state); 2153 slp_state = ACPI_SS_GPE_SET; 2154 2155 /* 2156 * Inform all devices that we are going to sleep. If at least one 2157 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2158 * 2159 * XXX Note that a better two-pass approach with a 'veto' pass 2160 * followed by a "real thing" pass would be better, but the current 2161 * bus interface does not provide for this. 2162 */ 2163 if (DEVICE_SUSPEND(root_bus) != 0) { 2164 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2165 break; 2166 } 2167 slp_state = ACPI_SS_DEV_SUSPEND; 2168 2169 status = AcpiEnterSleepStatePrep(state); 2170 if (ACPI_FAILURE(status)) { 2171 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2172 AcpiFormatException(status)); 2173 break; 2174 } 2175 slp_state = ACPI_SS_SLP_PREP; 2176 2177 if (sc->acpi_sleep_delay > 0) 2178 DELAY(sc->acpi_sleep_delay * 1000000); 2179 2180 if (state != ACPI_STATE_S1) { 2181 acpi_sleep_machdep(sc, state); 2182 2183 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2184 if (state == ACPI_STATE_S4) 2185 AcpiEnable(); 2186 } else { 2187 ACPI_DISABLE_IRQS(); 2188 status = AcpiEnterSleepState(state); 2189 if (ACPI_FAILURE(status)) { 2190 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2191 AcpiFormatException(status)); 2192 break; 2193 } 2194 } 2195 slp_state = ACPI_SS_SLEPT; 2196 break; 2197 case ACPI_STATE_S5: 2198 /* 2199 * Shut down cleanly and power off. This will call us back through the 2200 * shutdown handlers. 2201 */ 2202 shutdown_nice(RB_POWEROFF); 2203 break; 2204 case ACPI_STATE_S0: 2205 default: 2206 status = AE_BAD_PARAMETER; 2207 break; 2208 } 2209 2210 /* 2211 * Back out state according to how far along we got in the suspend 2212 * process. This handles both the error and success cases. 2213 */ 2214 if (slp_state >= ACPI_SS_GPE_SET) { 2215 acpi_wake_prep_walk(state); 2216 sc->acpi_sstate = ACPI_STATE_S0; 2217 } 2218 if (slp_state >= ACPI_SS_SLP_PREP) 2219 AcpiLeaveSleepState(state); 2220 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2221 DEVICE_RESUME(root_bus); 2222 if (slp_state >= ACPI_SS_SLEPT) 2223 acpi_enable_fixed_events(sc); 2224 2225 /* Allow another sleep request after a while. */ 2226 if (state != ACPI_STATE_S5) 2227 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 2228 2229 mtx_unlock(&Giant); 2230 return_ACPI_STATUS (status); 2231} 2232 2233/* Initialize a device's wake GPE. */ 2234int 2235acpi_wake_init(device_t dev, int type) 2236{ 2237 struct acpi_prw_data prw; 2238 2239 /* Evaluate _PRW to find the GPE. */ 2240 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2241 return (ENXIO); 2242 2243 /* Set the requested type for the GPE (runtime, wake, or both). */ 2244 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 2245 device_printf(dev, "set GPE type failed\n"); 2246 return (ENXIO); 2247 } 2248 2249 return (0); 2250} 2251 2252/* Enable or disable the device's wake GPE. */ 2253int 2254acpi_wake_set_enable(device_t dev, int enable) 2255{ 2256 struct acpi_prw_data prw; 2257 ACPI_HANDLE handle; 2258 ACPI_STATUS status; 2259 int flags; 2260 2261 /* Make sure the device supports waking the system and get the GPE. */ 2262 handle = acpi_get_handle(dev); 2263 if (acpi_parse_prw(handle, &prw) != 0) 2264 return (ENXIO); 2265 2266 flags = acpi_get_flags(dev); 2267 if (enable) { 2268 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2269 if (ACPI_FAILURE(status)) { 2270 device_printf(dev, "enable wake failed\n"); 2271 return (ENXIO); 2272 } 2273 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2274 } else { 2275 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2276 if (ACPI_FAILURE(status)) { 2277 device_printf(dev, "disable wake failed\n"); 2278 return (ENXIO); 2279 } 2280 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2281 } 2282 2283 return (0); 2284} 2285 2286static int 2287acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2288{ 2289 struct acpi_prw_data prw; 2290 device_t dev; 2291 2292 /* Check that this is a wake-capable device and get its GPE. */ 2293 if (acpi_parse_prw(handle, &prw) != 0) 2294 return (ENXIO); 2295 dev = acpi_get_device(handle); 2296 2297 /* 2298 * The destination sleep state must be less than (i.e., higher power) 2299 * or equal to the value specified by _PRW. If this GPE cannot be 2300 * enabled for the next sleep state, then disable it. If it can and 2301 * the user requested it be enabled, turn on any required power resources 2302 * and set _PSW. 2303 */ 2304 if (sstate > prw.lowest_wake) { 2305 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2306 if (bootverbose) 2307 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2308 acpi_name(handle), sstate); 2309 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2310 acpi_pwr_wake_enable(handle, 1); 2311 acpi_SetInteger(handle, "_PSW", 1); 2312 if (bootverbose) 2313 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2314 acpi_name(handle), sstate); 2315 } 2316 2317 return (0); 2318} 2319 2320static int 2321acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2322{ 2323 struct acpi_prw_data prw; 2324 device_t dev; 2325 2326 /* 2327 * Check that this is a wake-capable device and get its GPE. Return 2328 * now if the user didn't enable this device for wake. 2329 */ 2330 if (acpi_parse_prw(handle, &prw) != 0) 2331 return (ENXIO); 2332 dev = acpi_get_device(handle); 2333 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2334 return (0); 2335 2336 /* 2337 * If this GPE couldn't be enabled for the previous sleep state, it was 2338 * disabled before going to sleep so re-enable it. If it was enabled, 2339 * clear _PSW and turn off any power resources it used. 2340 */ 2341 if (sstate > prw.lowest_wake) { 2342 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2343 if (bootverbose) 2344 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2345 } else { 2346 acpi_SetInteger(handle, "_PSW", 0); 2347 acpi_pwr_wake_enable(handle, 0); 2348 if (bootverbose) 2349 device_printf(dev, "run_prep cleaned up for %s\n", 2350 acpi_name(handle)); 2351 } 2352 2353 return (0); 2354} 2355 2356static ACPI_STATUS 2357acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2358{ 2359 int sstate; 2360 2361 /* If suspending, run the sleep prep function, otherwise wake. */ 2362 sstate = *(int *)context; 2363 if (AcpiGbl_SystemAwakeAndRunning) 2364 acpi_wake_sleep_prep(handle, sstate); 2365 else 2366 acpi_wake_run_prep(handle, sstate); 2367 return (AE_OK); 2368} 2369 2370/* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2371static int 2372acpi_wake_prep_walk(int sstate) 2373{ 2374 ACPI_HANDLE sb_handle; 2375 2376 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2377 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2378 acpi_wake_prep, &sstate, NULL); 2379 return (0); 2380} 2381 2382/* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2383static int 2384acpi_wake_sysctl_walk(device_t dev) 2385{ 2386 int error, i, numdevs; 2387 device_t *devlist; 2388 device_t child; 2389 ACPI_STATUS status; 2390 2391 error = device_get_children(dev, &devlist, &numdevs); 2392 if (error != 0 || numdevs == 0) { 2393 if (numdevs == 0) 2394 free(devlist, M_TEMP); 2395 return (error); 2396 } 2397 for (i = 0; i < numdevs; i++) { 2398 child = devlist[i]; 2399 acpi_wake_sysctl_walk(child); 2400 if (!device_is_attached(child)) 2401 continue; 2402 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2403 if (ACPI_SUCCESS(status)) { 2404 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2405 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2406 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2407 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2408 } 2409 } 2410 free(devlist, M_TEMP); 2411 2412 return (0); 2413} 2414 2415/* Enable or disable wake from userland. */ 2416static int 2417acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2418{ 2419 int enable, error; 2420 device_t dev; 2421 2422 dev = (device_t)arg1; 2423 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2424 2425 error = sysctl_handle_int(oidp, &enable, 0, req); 2426 if (error != 0 || req->newptr == NULL) 2427 return (error); 2428 if (enable != 0 && enable != 1) 2429 return (EINVAL); 2430 2431 return (acpi_wake_set_enable(dev, enable)); 2432} 2433 2434/* Parse a device's _PRW into a structure. */ 2435int 2436acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2437{ 2438 ACPI_STATUS status; 2439 ACPI_BUFFER prw_buffer; 2440 ACPI_OBJECT *res, *res2; 2441 int error, i, power_count; 2442 2443 if (h == NULL || prw == NULL) 2444 return (EINVAL); 2445 2446 /* 2447 * The _PRW object (7.2.9) is only required for devices that have the 2448 * ability to wake the system from a sleeping state. 2449 */ 2450 error = EINVAL; 2451 prw_buffer.Pointer = NULL; 2452 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2453 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2454 if (ACPI_FAILURE(status)) 2455 return (ENOENT); 2456 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2457 if (res == NULL) 2458 return (ENOENT); 2459 if (!ACPI_PKG_VALID(res, 2)) 2460 goto out; 2461 2462 /* 2463 * Element 1 of the _PRW object: 2464 * The lowest power system sleeping state that can be entered while still 2465 * providing wake functionality. The sleeping state being entered must 2466 * be less than (i.e., higher power) or equal to this value. 2467 */ 2468 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2469 goto out; 2470 2471 /* 2472 * Element 0 of the _PRW object: 2473 */ 2474 switch (res->Package.Elements[0].Type) { 2475 case ACPI_TYPE_INTEGER: 2476 /* 2477 * If the data type of this package element is numeric, then this 2478 * _PRW package element is the bit index in the GPEx_EN, in the 2479 * GPE blocks described in the FADT, of the enable bit that is 2480 * enabled for the wake event. 2481 */ 2482 prw->gpe_handle = NULL; 2483 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2484 error = 0; 2485 break; 2486 case ACPI_TYPE_PACKAGE: 2487 /* 2488 * If the data type of this package element is a package, then this 2489 * _PRW package element is itself a package containing two 2490 * elements. The first is an object reference to the GPE Block 2491 * device that contains the GPE that will be triggered by the wake 2492 * event. The second element is numeric and it contains the bit 2493 * index in the GPEx_EN, in the GPE Block referenced by the 2494 * first element in the package, of the enable bit that is enabled for 2495 * the wake event. 2496 * 2497 * For example, if this field is a package then it is of the form: 2498 * Package() {\_SB.PCI0.ISA.GPE, 2} 2499 */ 2500 res2 = &res->Package.Elements[0]; 2501 if (!ACPI_PKG_VALID(res2, 2)) 2502 goto out; 2503 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2504 if (prw->gpe_handle == NULL) 2505 goto out; 2506 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2507 goto out; 2508 error = 0; 2509 break; 2510 default: 2511 goto out; 2512 } 2513 2514 /* Elements 2 to N of the _PRW object are power resources. */ 2515 power_count = res->Package.Count - 2; 2516 if (power_count > ACPI_PRW_MAX_POWERRES) { 2517 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2518 power_count = 0; 2519 } 2520 prw->power_res_count = power_count; 2521 for (i = 0; i < power_count; i++) 2522 prw->power_res[i] = res->Package.Elements[i]; 2523 2524out: 2525 if (prw_buffer.Pointer != NULL) 2526 AcpiOsFree(prw_buffer.Pointer); 2527 return (error); 2528} 2529 2530/* 2531 * ACPI Event Handlers 2532 */ 2533 2534/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2535 2536static void 2537acpi_system_eventhandler_sleep(void *arg, int state) 2538{ 2539 2540 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2541 2542 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2543 acpi_SetSleepState((struct acpi_softc *)arg, state); 2544 2545 return_VOID; 2546} 2547 2548static void 2549acpi_system_eventhandler_wakeup(void *arg, int state) 2550{ 2551 2552 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2553 2554 /* Currently, nothing to do for wakeup. */ 2555 2556 return_VOID; 2557} 2558 2559/* 2560 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2561 */ 2562UINT32 2563acpi_event_power_button_sleep(void *context) 2564{ 2565 struct acpi_softc *sc = (struct acpi_softc *)context; 2566 2567 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2568 2569 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2570 2571 return_VALUE (ACPI_INTERRUPT_HANDLED); 2572} 2573 2574UINT32 2575acpi_event_power_button_wake(void *context) 2576{ 2577 struct acpi_softc *sc = (struct acpi_softc *)context; 2578 2579 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2580 2581 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2582 2583 return_VALUE (ACPI_INTERRUPT_HANDLED); 2584} 2585 2586UINT32 2587acpi_event_sleep_button_sleep(void *context) 2588{ 2589 struct acpi_softc *sc = (struct acpi_softc *)context; 2590 2591 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2592 2593 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2594 2595 return_VALUE (ACPI_INTERRUPT_HANDLED); 2596} 2597 2598UINT32 2599acpi_event_sleep_button_wake(void *context) 2600{ 2601 struct acpi_softc *sc = (struct acpi_softc *)context; 2602 2603 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2604 2605 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2606 2607 return_VALUE (ACPI_INTERRUPT_HANDLED); 2608} 2609 2610/* 2611 * XXX This static buffer is suboptimal. There is no locking so only 2612 * use this for single-threaded callers. 2613 */ 2614char * 2615acpi_name(ACPI_HANDLE handle) 2616{ 2617 ACPI_BUFFER buf; 2618 static char data[256]; 2619 2620 buf.Length = sizeof(data); 2621 buf.Pointer = data; 2622 2623 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2624 return (data); 2625 return ("(unknown)"); 2626} 2627 2628/* 2629 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2630 * parts of the namespace. 2631 */ 2632int 2633acpi_avoid(ACPI_HANDLE handle) 2634{ 2635 char *cp, *env, *np; 2636 int len; 2637 2638 np = acpi_name(handle); 2639 if (*np == '\\') 2640 np++; 2641 if ((env = getenv("debug.acpi.avoid")) == NULL) 2642 return (0); 2643 2644 /* Scan the avoid list checking for a match */ 2645 cp = env; 2646 for (;;) { 2647 while (*cp != 0 && isspace(*cp)) 2648 cp++; 2649 if (*cp == 0) 2650 break; 2651 len = 0; 2652 while (cp[len] != 0 && !isspace(cp[len])) 2653 len++; 2654 if (!strncmp(cp, np, len)) { 2655 freeenv(env); 2656 return(1); 2657 } 2658 cp += len; 2659 } 2660 freeenv(env); 2661 2662 return (0); 2663} 2664 2665/* 2666 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2667 */ 2668int 2669acpi_disabled(char *subsys) 2670{ 2671 char *cp, *env; 2672 int len; 2673 2674 if ((env = getenv("debug.acpi.disabled")) == NULL) 2675 return (0); 2676 if (strcmp(env, "all") == 0) { 2677 freeenv(env); 2678 return (1); 2679 } 2680 2681 /* Scan the disable list, checking for a match. */ 2682 cp = env; 2683 for (;;) { 2684 while (*cp != '\0' && isspace(*cp)) 2685 cp++; 2686 if (*cp == '\0') 2687 break; 2688 len = 0; 2689 while (cp[len] != '\0' && !isspace(cp[len])) 2690 len++; 2691 if (strncmp(cp, subsys, len) == 0) { 2692 freeenv(env); 2693 return (1); 2694 } 2695 cp += len; 2696 } 2697 freeenv(env); 2698 2699 return (0); 2700} 2701 2702/* 2703 * Control interface. 2704 * 2705 * We multiplex ioctls for all participating ACPI devices here. Individual 2706 * drivers wanting to be accessible via /dev/acpi should use the 2707 * register/deregister interface to make their handlers visible. 2708 */ 2709struct acpi_ioctl_hook 2710{ 2711 TAILQ_ENTRY(acpi_ioctl_hook) link; 2712 u_long cmd; 2713 acpi_ioctl_fn fn; 2714 void *arg; 2715}; 2716 2717static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2718static int acpi_ioctl_hooks_initted; 2719 2720int 2721acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2722{ 2723 struct acpi_ioctl_hook *hp; 2724 2725 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2726 return (ENOMEM); 2727 hp->cmd = cmd; 2728 hp->fn = fn; 2729 hp->arg = arg; 2730 2731 ACPI_LOCK(acpi); 2732 if (acpi_ioctl_hooks_initted == 0) { 2733 TAILQ_INIT(&acpi_ioctl_hooks); 2734 acpi_ioctl_hooks_initted = 1; 2735 } 2736 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2737 ACPI_UNLOCK(acpi); 2738 2739 return (0); 2740} 2741 2742void 2743acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2744{ 2745 struct acpi_ioctl_hook *hp; 2746 2747 ACPI_LOCK(acpi); 2748 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2749 if (hp->cmd == cmd && hp->fn == fn) 2750 break; 2751 2752 if (hp != NULL) { 2753 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2754 free(hp, M_ACPIDEV); 2755 } 2756 ACPI_UNLOCK(acpi); 2757} 2758 2759static int 2760acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2761{ 2762 return (0); 2763} 2764 2765static int 2766acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2767{ 2768 return (0); 2769} 2770 2771static int 2772acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2773{ 2774 struct acpi_softc *sc; 2775 struct acpi_ioctl_hook *hp; 2776 int error, state; 2777 2778 error = 0; 2779 hp = NULL; 2780 sc = dev->si_drv1; 2781 2782 /* 2783 * Scan the list of registered ioctls, looking for handlers. 2784 */ 2785 ACPI_LOCK(acpi); 2786 if (acpi_ioctl_hooks_initted) 2787 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2788 if (hp->cmd == cmd) 2789 break; 2790 } 2791 ACPI_UNLOCK(acpi); 2792 if (hp) 2793 return (hp->fn(cmd, addr, hp->arg)); 2794 2795 /* 2796 * Core ioctls are not permitted for non-writable user. 2797 * Currently, other ioctls just fetch information. 2798 * Not changing system behavior. 2799 */ 2800 if ((flag & FWRITE) == 0) 2801 return (EPERM); 2802 2803 /* Core system ioctls. */ 2804 switch (cmd) { 2805 case ACPIIO_SETSLPSTATE: 2806 error = EINVAL; 2807 state = *(int *)addr; 2808 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2809 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 2810 error = 0; 2811 break; 2812 default: 2813 error = ENXIO; 2814 break; 2815 } 2816 2817 return (error); 2818} 2819 2820static int 2821acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2822{ 2823 int error; 2824 struct sbuf sb; 2825 UINT8 state, TypeA, TypeB; 2826 2827 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 2828 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 2829 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 2830 sbuf_printf(&sb, "S%d ", state); 2831 sbuf_trim(&sb); 2832 sbuf_finish(&sb); 2833 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 2834 sbuf_delete(&sb); 2835 return (error); 2836} 2837 2838static int 2839acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2840{ 2841 char sleep_state[10]; 2842 int error; 2843 u_int new_state, old_state; 2844 2845 old_state = *(u_int *)oidp->oid_arg1; 2846 if (old_state > ACPI_S_STATES_MAX + 1) 2847 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 2848 else 2849 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 2850 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2851 if (error == 0 && req->newptr != NULL) { 2852 new_state = ACPI_STATE_S0; 2853 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 2854 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 2855 break; 2856 if (new_state <= ACPI_S_STATES_MAX + 1) { 2857 if (new_state != old_state) 2858 *(u_int *)oidp->oid_arg1 = new_state; 2859 } else 2860 error = EINVAL; 2861 } 2862 2863 return (error); 2864} 2865 2866/* Inform devctl(4) when we receive a Notify. */ 2867void 2868acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 2869{ 2870 char notify_buf[16]; 2871 ACPI_BUFFER handle_buf; 2872 ACPI_STATUS status; 2873 2874 if (subsystem == NULL) 2875 return; 2876 2877 handle_buf.Pointer = NULL; 2878 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 2879 status = AcpiNsHandleToPathname(h, &handle_buf); 2880 if (ACPI_FAILURE(status)) 2881 return; 2882 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 2883 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 2884 AcpiOsFree(handle_buf.Pointer); 2885} 2886 2887#ifdef ACPI_DEBUG 2888/* 2889 * Support for parsing debug options from the kernel environment. 2890 * 2891 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2892 * by specifying the names of the bits in the debug.acpi.layer and 2893 * debug.acpi.level environment variables. Bits may be unset by 2894 * prefixing the bit name with !. 2895 */ 2896struct debugtag 2897{ 2898 char *name; 2899 UINT32 value; 2900}; 2901 2902static struct debugtag dbg_layer[] = { 2903 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2904 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2905 {"ACPI_EVENTS", ACPI_EVENTS}, 2906 {"ACPI_TABLES", ACPI_TABLES}, 2907 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2908 {"ACPI_PARSER", ACPI_PARSER}, 2909 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2910 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2911 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2912 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2913 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2914 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2915 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2916 2917 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2918 {"ACPI_BATTERY", ACPI_BATTERY}, 2919 {"ACPI_BUS", ACPI_BUS}, 2920 {"ACPI_BUTTON", ACPI_BUTTON}, 2921 {"ACPI_EC", ACPI_EC}, 2922 {"ACPI_FAN", ACPI_FAN}, 2923 {"ACPI_POWERRES", ACPI_POWERRES}, 2924 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2925 {"ACPI_THERMAL", ACPI_THERMAL}, 2926 {"ACPI_TIMER", ACPI_TIMER}, 2927 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2928 {NULL, 0} 2929}; 2930 2931static struct debugtag dbg_level[] = { 2932 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2933 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2934 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2935 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2936 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2937 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2938 2939 /* Trace verbosity level 1 [Standard Trace Level] */ 2940 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2941 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2942 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2943 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2944 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2945 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2946 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2947 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2948 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2949 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2950 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2951 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2952 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2953 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2954 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2955 2956 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2957 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2958 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2959 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2960 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2961 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2962 2963 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2964 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2965 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2966 {"ACPI_LV_IO", ACPI_LV_IO}, 2967 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2968 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2969 2970 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2971 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2972 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2973 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2974 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2975 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2976 {NULL, 0} 2977}; 2978 2979static void 2980acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2981{ 2982 char *ep; 2983 int i, l; 2984 int set; 2985 2986 while (*cp) { 2987 if (isspace(*cp)) { 2988 cp++; 2989 continue; 2990 } 2991 ep = cp; 2992 while (*ep && !isspace(*ep)) 2993 ep++; 2994 if (*cp == '!') { 2995 set = 0; 2996 cp++; 2997 if (cp == ep) 2998 continue; 2999 } else { 3000 set = 1; 3001 } 3002 l = ep - cp; 3003 for (i = 0; tag[i].name != NULL; i++) { 3004 if (!strncmp(cp, tag[i].name, l)) { 3005 if (set) 3006 *flag |= tag[i].value; 3007 else 3008 *flag &= ~tag[i].value; 3009 } 3010 } 3011 cp = ep; 3012 } 3013} 3014 3015static void 3016acpi_set_debugging(void *junk) 3017{ 3018 char *layer, *level; 3019 3020 if (cold) { 3021 AcpiDbgLayer = 0; 3022 AcpiDbgLevel = 0; 3023 } 3024 3025 layer = getenv("debug.acpi.layer"); 3026 level = getenv("debug.acpi.level"); 3027 if (layer == NULL && level == NULL) 3028 return; 3029 3030 printf("ACPI set debug"); 3031 if (layer != NULL) { 3032 if (strcmp("NONE", layer) != 0) 3033 printf(" layer '%s'", layer); 3034 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3035 freeenv(layer); 3036 } 3037 if (level != NULL) { 3038 if (strcmp("NONE", level) != 0) 3039 printf(" level '%s'", level); 3040 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3041 freeenv(level); 3042 } 3043 printf("\n"); 3044} 3045 3046SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3047 NULL); 3048 3049static int 3050acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3051{ 3052 int error, *dbg; 3053 struct debugtag *tag; 3054 struct sbuf sb; 3055 3056 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3057 return (ENOMEM); 3058 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3059 tag = &dbg_layer[0]; 3060 dbg = &AcpiDbgLayer; 3061 } else { 3062 tag = &dbg_level[0]; 3063 dbg = &AcpiDbgLevel; 3064 } 3065 3066 /* Get old values if this is a get request. */ 3067 ACPI_SERIAL_BEGIN(acpi); 3068 if (*dbg == 0) { 3069 sbuf_cpy(&sb, "NONE"); 3070 } else if (req->newptr == NULL) { 3071 for (; tag->name != NULL; tag++) { 3072 if ((*dbg & tag->value) == tag->value) 3073 sbuf_printf(&sb, "%s ", tag->name); 3074 } 3075 } 3076 sbuf_trim(&sb); 3077 sbuf_finish(&sb); 3078 3079 /* Copy out the old values to the user. */ 3080 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3081 sbuf_delete(&sb); 3082 3083 /* If the user is setting a string, parse it. */ 3084 if (error == 0 && req->newptr != NULL) { 3085 *dbg = 0; 3086 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3087 acpi_set_debugging(NULL); 3088 } 3089 ACPI_SERIAL_END(acpi); 3090 3091 return (error); 3092} 3093 3094SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3095 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3096SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3097 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3098#endif /* ACPI_DEBUG */ 3099 3100static int 3101acpi_pm_func(u_long cmd, void *arg, ...) 3102{ 3103 int state, acpi_state; 3104 int error; 3105 struct acpi_softc *sc; 3106 va_list ap; 3107 3108 error = 0; 3109 switch (cmd) { 3110 case POWER_CMD_SUSPEND: 3111 sc = (struct acpi_softc *)arg; 3112 if (sc == NULL) { 3113 error = EINVAL; 3114 goto out; 3115 } 3116 3117 va_start(ap, arg); 3118 state = va_arg(ap, int); 3119 va_end(ap); 3120 3121 switch (state) { 3122 case POWER_SLEEP_STATE_STANDBY: 3123 acpi_state = sc->acpi_standby_sx; 3124 break; 3125 case POWER_SLEEP_STATE_SUSPEND: 3126 acpi_state = sc->acpi_suspend_sx; 3127 break; 3128 case POWER_SLEEP_STATE_HIBERNATE: 3129 acpi_state = ACPI_STATE_S4; 3130 break; 3131 default: 3132 error = EINVAL; 3133 goto out; 3134 } 3135 3136 acpi_SetSleepState(sc, acpi_state); 3137 break; 3138 default: 3139 error = EINVAL; 3140 goto out; 3141 } 3142 3143out: 3144 return (error); 3145} 3146 3147static void 3148acpi_pm_register(void *arg) 3149{ 3150 if (!cold || resource_disabled("acpi", 0)) 3151 return; 3152 3153 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3154} 3155 3156SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3157