acpi.c revision 231161
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 231161 2012-02-07 20:54:44Z jkim $"); 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/sched.h> 50#include <sys/smp.h> 51#include <sys/timetc.h> 52 53#if defined(__i386__) || defined(__amd64__) 54#include <machine/pci_cfgreg.h> 55#endif 56#include <machine/resource.h> 57#include <machine/bus.h> 58#include <sys/rman.h> 59#include <isa/isavar.h> 60#include <isa/pnpvar.h> 61 62#include <contrib/dev/acpica/include/acpi.h> 63#include <contrib/dev/acpica/include/accommon.h> 64#include <contrib/dev/acpica/include/acnamesp.h> 65 66#include <dev/acpica/acpivar.h> 67#include <dev/acpica/acpiio.h> 68 69#include <vm/vm_param.h> 70 71static MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 72 73/* Hooks for the ACPI CA debugging infrastructure */ 74#define _COMPONENT ACPI_BUS 75ACPI_MODULE_NAME("ACPI") 76 77static d_open_t acpiopen; 78static d_close_t acpiclose; 79static d_ioctl_t acpiioctl; 80 81static struct cdevsw acpi_cdevsw = { 82 .d_version = D_VERSION, 83 .d_open = acpiopen, 84 .d_close = acpiclose, 85 .d_ioctl = acpiioctl, 86 .d_name = "acpi", 87}; 88 89struct acpi_interface { 90 ACPI_STRING *data; 91 int num; 92}; 93 94/* Global mutex for locking access to the ACPI subsystem. */ 95struct mtx acpi_mutex; 96 97/* Bitmap of device quirks. */ 98int acpi_quirks; 99 100/* Supported sleep states. */ 101static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT]; 102 103static int acpi_modevent(struct module *mod, int event, void *junk); 104static int acpi_probe(device_t dev); 105static int acpi_attach(device_t dev); 106static int acpi_suspend(device_t dev); 107static int acpi_resume(device_t dev); 108static int acpi_shutdown(device_t dev); 109static device_t acpi_add_child(device_t bus, u_int order, const char *name, 110 int unit); 111static int acpi_print_child(device_t bus, device_t child); 112static void acpi_probe_nomatch(device_t bus, device_t child); 113static void acpi_driver_added(device_t dev, driver_t *driver); 114static int acpi_read_ivar(device_t dev, device_t child, int index, 115 uintptr_t *result); 116static int acpi_write_ivar(device_t dev, device_t child, int index, 117 uintptr_t value); 118static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 119static void acpi_reserve_resources(device_t dev); 120static int acpi_sysres_alloc(device_t dev); 121static int acpi_set_resource(device_t dev, device_t child, int type, 122 int rid, u_long start, u_long count); 123static struct resource *acpi_alloc_resource(device_t bus, device_t child, 124 int type, int *rid, u_long start, u_long end, 125 u_long count, u_int flags); 126static int acpi_adjust_resource(device_t bus, device_t child, int type, 127 struct resource *r, u_long start, u_long end); 128static int acpi_release_resource(device_t bus, device_t child, int type, 129 int rid, struct resource *r); 130static void acpi_delete_resource(device_t bus, device_t child, int type, 131 int rid); 132static uint32_t acpi_isa_get_logicalid(device_t dev); 133static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 134static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 135static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 136 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 137 ACPI_BUFFER *ret); 138static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 139 void *context, void **retval); 140static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 141 int max_depth, acpi_scan_cb_t user_fn, void *arg); 142static int acpi_set_powerstate(device_t child, int state); 143static int acpi_isa_pnp_probe(device_t bus, device_t child, 144 struct isa_pnp_id *ids); 145static void acpi_probe_children(device_t bus); 146static void acpi_probe_order(ACPI_HANDLE handle, int *order); 147static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 148 void *context, void **status); 149static void acpi_sleep_enable(void *arg); 150static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc); 151static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 152static void acpi_shutdown_final(void *arg, int howto); 153static void acpi_enable_fixed_events(struct acpi_softc *sc); 154static BOOLEAN acpi_has_hid(ACPI_HANDLE handle); 155static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 156static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 157static int acpi_wake_prep_walk(int sstate); 158static int acpi_wake_sysctl_walk(device_t dev); 159static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 160static void acpi_system_eventhandler_sleep(void *arg, int state); 161static void acpi_system_eventhandler_wakeup(void *arg, int state); 162static int acpi_sname2sstate(const char *sname); 163static const char *acpi_sstate2sname(int sstate); 164static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 165static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 166static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 167static int acpi_pm_func(u_long cmd, void *arg, ...); 168static int acpi_child_location_str_method(device_t acdev, device_t child, 169 char *buf, size_t buflen); 170static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 171 char *buf, size_t buflen); 172#if defined(__i386__) || defined(__amd64__) 173static void acpi_enable_pcie(void); 174#endif 175static void acpi_hint_device_unit(device_t acdev, device_t child, 176 const char *name, int *unitp); 177static void acpi_reset_interfaces(device_t dev); 178 179static device_method_t acpi_methods[] = { 180 /* Device interface */ 181 DEVMETHOD(device_probe, acpi_probe), 182 DEVMETHOD(device_attach, acpi_attach), 183 DEVMETHOD(device_shutdown, acpi_shutdown), 184 DEVMETHOD(device_detach, bus_generic_detach), 185 DEVMETHOD(device_suspend, acpi_suspend), 186 DEVMETHOD(device_resume, acpi_resume), 187 188 /* Bus interface */ 189 DEVMETHOD(bus_add_child, acpi_add_child), 190 DEVMETHOD(bus_print_child, acpi_print_child), 191 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 192 DEVMETHOD(bus_driver_added, acpi_driver_added), 193 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 194 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 195 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 196 DEVMETHOD(bus_set_resource, acpi_set_resource), 197 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 198 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 199 DEVMETHOD(bus_adjust_resource, acpi_adjust_resource), 200 DEVMETHOD(bus_release_resource, acpi_release_resource), 201 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 202 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 203 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 204 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 205 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 206 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 207 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 208 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit), 209 210 /* ACPI bus */ 211 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 212 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 213 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 214 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 215 216 /* ISA emulation */ 217 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 218 219 {0, 0} 220}; 221 222static driver_t acpi_driver = { 223 "acpi", 224 acpi_methods, 225 sizeof(struct acpi_softc), 226}; 227 228static devclass_t acpi_devclass; 229DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 230MODULE_VERSION(acpi, 1); 231 232ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 233 234/* Local pools for managing system resources for ACPI child devices. */ 235static struct rman acpi_rman_io, acpi_rman_mem; 236 237#define ACPI_MINIMUM_AWAKETIME 5 238 239/* Holds the description of the acpi0 device. */ 240static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 241 242SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 243static char acpi_ca_version[12]; 244SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 245 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 246 247/* 248 * Allow overriding _OSI methods. 249 */ 250static char acpi_install_interface[256]; 251TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, 252 sizeof(acpi_install_interface)); 253static char acpi_remove_interface[256]; 254TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, 255 sizeof(acpi_remove_interface)); 256 257/* 258 * Allow override of whether methods execute in parallel or not. 259 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 260 * errors for AML that really can't handle parallel method execution. 261 * It is off by default since this breaks recursive methods and 262 * some IBMs use such code. 263 */ 264static int acpi_serialize_methods; 265TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 266 267/* Allow users to dump Debug objects without ACPI debugger. */ 268static int acpi_debug_objects; 269TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 270SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 271 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 272 "Enable Debug objects"); 273 274/* Allow the interpreter to ignore common mistakes in BIOS. */ 275static int acpi_interpreter_slack = 1; 276TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 277SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN, 278 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 279 280/* Reset system clock while resuming. XXX Remove once tested. */ 281static int acpi_reset_clock = 1; 282TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock); 283SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW, 284 &acpi_reset_clock, 1, "Reset system clock while resuming."); 285 286/* Allow users to override quirks. */ 287TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 288 289static int acpi_susp_bounce; 290SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 291 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 292 293/* 294 * ACPI can only be loaded as a module by the loader; activating it after 295 * system bootstrap time is not useful, and can be fatal to the system. 296 * It also cannot be unloaded, since the entire system bus hierarchy hangs 297 * off it. 298 */ 299static int 300acpi_modevent(struct module *mod, int event, void *junk) 301{ 302 switch (event) { 303 case MOD_LOAD: 304 if (!cold) { 305 printf("The ACPI driver cannot be loaded after boot.\n"); 306 return (EPERM); 307 } 308 break; 309 case MOD_UNLOAD: 310 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 311 return (EBUSY); 312 break; 313 default: 314 break; 315 } 316 return (0); 317} 318 319/* 320 * Perform early initialization. 321 */ 322ACPI_STATUS 323acpi_Startup(void) 324{ 325 static int started = 0; 326 ACPI_STATUS status; 327 int val; 328 329 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 330 331 /* Only run the startup code once. The MADT driver also calls this. */ 332 if (started) 333 return_VALUE (AE_OK); 334 started = 1; 335 336 /* 337 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 338 * if more tables exist. 339 */ 340 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 341 printf("ACPI: Table initialisation failed: %s\n", 342 AcpiFormatException(status)); 343 return_VALUE (status); 344 } 345 346 /* Set up any quirks we have for this system. */ 347 if (acpi_quirks == ACPI_Q_OK) 348 acpi_table_quirks(&acpi_quirks); 349 350 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 351 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 352 acpi_quirks &= ~ACPI_Q_BROKEN; 353 if (acpi_quirks & ACPI_Q_BROKEN) { 354 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 355 status = AE_SUPPORT; 356 } 357 358 return_VALUE (status); 359} 360 361/* 362 * Detect ACPI and perform early initialisation. 363 */ 364int 365acpi_identify(void) 366{ 367 ACPI_TABLE_RSDP *rsdp; 368 ACPI_TABLE_HEADER *rsdt; 369 ACPI_PHYSICAL_ADDRESS paddr; 370 struct sbuf sb; 371 372 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 373 374 if (!cold) 375 return (ENXIO); 376 377 /* Check that we haven't been disabled with a hint. */ 378 if (resource_disabled("acpi", 0)) 379 return (ENXIO); 380 381 /* Check for other PM systems. */ 382 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 383 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 384 printf("ACPI identify failed, other PM system enabled.\n"); 385 return (ENXIO); 386 } 387 388 /* Initialize root tables. */ 389 if (ACPI_FAILURE(acpi_Startup())) { 390 printf("ACPI: Try disabling either ACPI or apic support.\n"); 391 return (ENXIO); 392 } 393 394 if ((paddr = AcpiOsGetRootPointer()) == 0 || 395 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 396 return (ENXIO); 397 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 398 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 399 else 400 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 401 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 402 403 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 404 return (ENXIO); 405 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); 406 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 407 sbuf_trim(&sb); 408 sbuf_putc(&sb, ' '); 409 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 410 sbuf_trim(&sb); 411 sbuf_finish(&sb); 412 sbuf_delete(&sb); 413 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 414 415 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 416 417 return (0); 418} 419 420/* 421 * Fetch some descriptive data from ACPI to put in our attach message. 422 */ 423static int 424acpi_probe(device_t dev) 425{ 426 427 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 428 429 device_set_desc(dev, acpi_desc); 430 431 return_VALUE (0); 432} 433 434static int 435acpi_attach(device_t dev) 436{ 437 struct acpi_softc *sc; 438 ACPI_STATUS status; 439 int error, state; 440 UINT32 flags; 441 UINT8 TypeA, TypeB; 442 char *env; 443 444 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 445 446 sc = device_get_softc(dev); 447 sc->acpi_dev = dev; 448 callout_init(&sc->susp_force_to, TRUE); 449 450 error = ENXIO; 451 452 /* Initialize resource manager. */ 453 acpi_rman_io.rm_type = RMAN_ARRAY; 454 acpi_rman_io.rm_start = 0; 455 acpi_rman_io.rm_end = 0xffff; 456 acpi_rman_io.rm_descr = "ACPI I/O ports"; 457 if (rman_init(&acpi_rman_io) != 0) 458 panic("acpi rman_init IO ports failed"); 459 acpi_rman_mem.rm_type = RMAN_ARRAY; 460 acpi_rman_mem.rm_start = 0; 461 acpi_rman_mem.rm_end = ~0ul; 462 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 463 if (rman_init(&acpi_rman_mem) != 0) 464 panic("acpi rman_init memory failed"); 465 466 /* Initialise the ACPI mutex */ 467 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 468 469 /* 470 * Set the globals from our tunables. This is needed because ACPI-CA 471 * uses UINT8 for some values and we have no tunable_byte. 472 */ 473 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods ? TRUE : FALSE; 474 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 475 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 476 477#ifndef ACPI_DEBUG 478 /* 479 * Disable all debugging layers and levels. 480 */ 481 AcpiDbgLayer = 0; 482 AcpiDbgLevel = 0; 483#endif 484 485 /* Start up the ACPI CA subsystem. */ 486 status = AcpiInitializeSubsystem(); 487 if (ACPI_FAILURE(status)) { 488 device_printf(dev, "Could not initialize Subsystem: %s\n", 489 AcpiFormatException(status)); 490 goto out; 491 } 492 493 /* Override OS interfaces if the user requested. */ 494 acpi_reset_interfaces(dev); 495 496 /* Load ACPI name space. */ 497 status = AcpiLoadTables(); 498 if (ACPI_FAILURE(status)) { 499 device_printf(dev, "Could not load Namespace: %s\n", 500 AcpiFormatException(status)); 501 goto out; 502 } 503 504#if defined(__i386__) || defined(__amd64__) 505 /* Handle MCFG table if present. */ 506 acpi_enable_pcie(); 507#endif 508 509 /* 510 * Note that some systems (specifically, those with namespace evaluation 511 * issues that require the avoidance of parts of the namespace) must 512 * avoid running _INI and _STA on everything, as well as dodging the final 513 * object init pass. 514 * 515 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 516 * 517 * XXX We should arrange for the object init pass after we have attached 518 * all our child devices, but on many systems it works here. 519 */ 520 flags = 0; 521 if (testenv("debug.acpi.avoid")) 522 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 523 524 /* Bring the hardware and basic handlers online. */ 525 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 526 device_printf(dev, "Could not enable ACPI: %s\n", 527 AcpiFormatException(status)); 528 goto out; 529 } 530 531 /* 532 * Call the ECDT probe function to provide EC functionality before 533 * the namespace has been evaluated. 534 * 535 * XXX This happens before the sysresource devices have been probed and 536 * attached so its resources come from nexus0. In practice, this isn't 537 * a problem but should be addressed eventually. 538 */ 539 acpi_ec_ecdt_probe(dev); 540 541 /* Bring device objects and regions online. */ 542 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 543 device_printf(dev, "Could not initialize ACPI objects: %s\n", 544 AcpiFormatException(status)); 545 goto out; 546 } 547 548 /* 549 * Setup our sysctl tree. 550 * 551 * XXX: This doesn't check to make sure that none of these fail. 552 */ 553 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 554 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 555 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 556 device_get_name(dev), CTLFLAG_RD, 0, ""); 557 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 558 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 559 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 560 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 561 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 562 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 563 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 564 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 565 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 566 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 567 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 568 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 569 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 570 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 571 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 572 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 573 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 574 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 575 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 576 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 577 "sleep delay in seconds"); 578 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 579 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 580 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 581 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 582 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 583 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 584 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 585 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 586 OID_AUTO, "handle_reboot", CTLFLAG_RW, 587 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 588 589 /* 590 * Default to 1 second before sleeping to give some machines time to 591 * stabilize. 592 */ 593 sc->acpi_sleep_delay = 1; 594 if (bootverbose) 595 sc->acpi_verbose = 1; 596 if ((env = getenv("hw.acpi.verbose")) != NULL) { 597 if (strcmp(env, "0") != 0) 598 sc->acpi_verbose = 1; 599 freeenv(env); 600 } 601 602 /* Only enable reboot by default if the FADT says it is available. */ 603 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 604 sc->acpi_handle_reboot = 1; 605 606 /* Only enable S4BIOS by default if the FACS says it is available. */ 607 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 608 sc->acpi_s4bios = 1; 609 610 /* Probe all supported sleep states. */ 611 acpi_sleep_states[ACPI_STATE_S0] = TRUE; 612 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 613 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 614 acpi_sleep_states[state] = TRUE; 615 616 /* 617 * Dispatch the default sleep state to devices. The lid switch is set 618 * to UNKNOWN by default to avoid surprising users. 619 */ 620 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ? 621 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN; 622 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN; 623 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ? 624 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN; 625 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ? 626 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN; 627 628 /* Pick the first valid sleep state for the sleep button default. */ 629 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN; 630 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 631 if (acpi_sleep_states[state]) { 632 sc->acpi_sleep_button_sx = state; 633 break; 634 } 635 636 acpi_enable_fixed_events(sc); 637 638 /* 639 * Scan the namespace and attach/initialise children. 640 */ 641 642 /* Register our shutdown handler. */ 643 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 644 SHUTDOWN_PRI_LAST); 645 646 /* 647 * Register our acpi event handlers. 648 * XXX should be configurable eg. via userland policy manager. 649 */ 650 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 651 sc, ACPI_EVENT_PRI_LAST); 652 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 653 sc, ACPI_EVENT_PRI_LAST); 654 655 /* Flag our initial states. */ 656 sc->acpi_enabled = TRUE; 657 sc->acpi_sstate = ACPI_STATE_S0; 658 sc->acpi_sleep_disabled = TRUE; 659 660 /* Create the control device */ 661 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 662 "acpi"); 663 sc->acpi_dev_t->si_drv1 = sc; 664 665 if ((error = acpi_machdep_init(dev))) 666 goto out; 667 668 /* Register ACPI again to pass the correct argument of pm_func. */ 669 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 670 671 if (!acpi_disabled("bus")) 672 acpi_probe_children(dev); 673 674 /* Update all GPEs and enable runtime GPEs. */ 675 status = AcpiUpdateAllGpes(); 676 if (ACPI_FAILURE(status)) 677 device_printf(dev, "Could not update all GPEs: %s\n", 678 AcpiFormatException(status)); 679 680 /* Allow sleep request after a while. */ 681 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 682 683 error = 0; 684 685 out: 686 return_VALUE (error); 687} 688 689static void 690acpi_set_power_children(device_t dev, int state) 691{ 692 device_t child, parent; 693 device_t *devlist; 694 struct pci_devinfo *dinfo; 695 int dstate, i, numdevs; 696 697 if (device_get_children(dev, &devlist, &numdevs) != 0) 698 return; 699 700 /* 701 * Retrieve and set D-state for the sleep state if _SxD is present. 702 * Skip children who aren't attached since they are handled separately. 703 */ 704 parent = device_get_parent(dev); 705 for (i = 0; i < numdevs; i++) { 706 child = devlist[i]; 707 dinfo = device_get_ivars(child); 708 dstate = state; 709 if (device_is_attached(child) && 710 acpi_device_pwr_for_sleep(parent, dev, &dstate) == 0) 711 acpi_set_powerstate(child, dstate); 712 } 713 free(devlist, M_TEMP); 714} 715 716static int 717acpi_suspend(device_t dev) 718{ 719 int error; 720 721 GIANT_REQUIRED; 722 723 error = bus_generic_suspend(dev); 724 if (error == 0) 725 acpi_set_power_children(dev, ACPI_STATE_D3); 726 727 return (error); 728} 729 730static int 731acpi_resume(device_t dev) 732{ 733 734 GIANT_REQUIRED; 735 736 acpi_set_power_children(dev, ACPI_STATE_D0); 737 738 return (bus_generic_resume(dev)); 739} 740 741static int 742acpi_shutdown(device_t dev) 743{ 744 745 GIANT_REQUIRED; 746 747 /* Allow children to shutdown first. */ 748 bus_generic_shutdown(dev); 749 750 /* 751 * Enable any GPEs that are able to power-on the system (i.e., RTC). 752 * Also, disable any that are not valid for this state (most). 753 */ 754 acpi_wake_prep_walk(ACPI_STATE_S5); 755 756 return (0); 757} 758 759/* 760 * Handle a new device being added 761 */ 762static device_t 763acpi_add_child(device_t bus, u_int order, const char *name, int unit) 764{ 765 struct acpi_device *ad; 766 device_t child; 767 768 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 769 return (NULL); 770 771 resource_list_init(&ad->ad_rl); 772 773 child = device_add_child_ordered(bus, order, name, unit); 774 if (child != NULL) 775 device_set_ivars(child, ad); 776 else 777 free(ad, M_ACPIDEV); 778 return (child); 779} 780 781static int 782acpi_print_child(device_t bus, device_t child) 783{ 784 struct acpi_device *adev = device_get_ivars(child); 785 struct resource_list *rl = &adev->ad_rl; 786 int retval = 0; 787 788 retval += bus_print_child_header(bus, child); 789 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 790 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 791 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 792 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 793 if (device_get_flags(child)) 794 retval += printf(" flags %#x", device_get_flags(child)); 795 retval += bus_print_child_footer(bus, child); 796 797 return (retval); 798} 799 800/* 801 * If this device is an ACPI child but no one claimed it, attempt 802 * to power it off. We'll power it back up when a driver is added. 803 * 804 * XXX Disabled for now since many necessary devices (like fdc and 805 * ATA) don't claim the devices we created for them but still expect 806 * them to be powered up. 807 */ 808static void 809acpi_probe_nomatch(device_t bus, device_t child) 810{ 811#ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 812 acpi_set_powerstate(child, ACPI_STATE_D3); 813#endif 814} 815 816/* 817 * If a new driver has a chance to probe a child, first power it up. 818 * 819 * XXX Disabled for now (see acpi_probe_nomatch for details). 820 */ 821static void 822acpi_driver_added(device_t dev, driver_t *driver) 823{ 824 device_t child, *devlist; 825 int i, numdevs; 826 827 DEVICE_IDENTIFY(driver, dev); 828 if (device_get_children(dev, &devlist, &numdevs)) 829 return; 830 for (i = 0; i < numdevs; i++) { 831 child = devlist[i]; 832 if (device_get_state(child) == DS_NOTPRESENT) { 833#ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 834 acpi_set_powerstate(child, ACPI_STATE_D0); 835 if (device_probe_and_attach(child) != 0) 836 acpi_set_powerstate(child, ACPI_STATE_D3); 837#else 838 device_probe_and_attach(child); 839#endif 840 } 841 } 842 free(devlist, M_TEMP); 843} 844 845/* Location hint for devctl(8) */ 846static int 847acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 848 size_t buflen) 849{ 850 struct acpi_device *dinfo = device_get_ivars(child); 851 852 if (dinfo->ad_handle) 853 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 854 else 855 snprintf(buf, buflen, "unknown"); 856 return (0); 857} 858 859/* PnP information for devctl(8) */ 860static int 861acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 862 size_t buflen) 863{ 864 struct acpi_device *dinfo = device_get_ivars(child); 865 ACPI_DEVICE_INFO *adinfo; 866 867 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 868 snprintf(buf, buflen, "unknown"); 869 return (0); 870 } 871 872 snprintf(buf, buflen, "_HID=%s _UID=%lu", 873 (adinfo->Valid & ACPI_VALID_HID) ? 874 adinfo->HardwareId.String : "none", 875 (adinfo->Valid & ACPI_VALID_UID) ? 876 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL); 877 AcpiOsFree(adinfo); 878 879 return (0); 880} 881 882/* 883 * Handle per-device ivars 884 */ 885static int 886acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 887{ 888 struct acpi_device *ad; 889 890 if ((ad = device_get_ivars(child)) == NULL) { 891 device_printf(child, "device has no ivars\n"); 892 return (ENOENT); 893 } 894 895 /* ACPI and ISA compatibility ivars */ 896 switch(index) { 897 case ACPI_IVAR_HANDLE: 898 *(ACPI_HANDLE *)result = ad->ad_handle; 899 break; 900 case ACPI_IVAR_PRIVATE: 901 *(void **)result = ad->ad_private; 902 break; 903 case ACPI_IVAR_FLAGS: 904 *(int *)result = ad->ad_flags; 905 break; 906 case ISA_IVAR_VENDORID: 907 case ISA_IVAR_SERIAL: 908 case ISA_IVAR_COMPATID: 909 *(int *)result = -1; 910 break; 911 case ISA_IVAR_LOGICALID: 912 *(int *)result = acpi_isa_get_logicalid(child); 913 break; 914 default: 915 return (ENOENT); 916 } 917 918 return (0); 919} 920 921static int 922acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 923{ 924 struct acpi_device *ad; 925 926 if ((ad = device_get_ivars(child)) == NULL) { 927 device_printf(child, "device has no ivars\n"); 928 return (ENOENT); 929 } 930 931 switch(index) { 932 case ACPI_IVAR_HANDLE: 933 ad->ad_handle = (ACPI_HANDLE)value; 934 break; 935 case ACPI_IVAR_PRIVATE: 936 ad->ad_private = (void *)value; 937 break; 938 case ACPI_IVAR_FLAGS: 939 ad->ad_flags = (int)value; 940 break; 941 default: 942 panic("bad ivar write request (%d)", index); 943 return (ENOENT); 944 } 945 946 return (0); 947} 948 949/* 950 * Handle child resource allocation/removal 951 */ 952static struct resource_list * 953acpi_get_rlist(device_t dev, device_t child) 954{ 955 struct acpi_device *ad; 956 957 ad = device_get_ivars(child); 958 return (&ad->ad_rl); 959} 960 961static int 962acpi_match_resource_hint(device_t dev, int type, long value) 963{ 964 struct acpi_device *ad = device_get_ivars(dev); 965 struct resource_list *rl = &ad->ad_rl; 966 struct resource_list_entry *rle; 967 968 STAILQ_FOREACH(rle, rl, link) { 969 if (rle->type != type) 970 continue; 971 if (rle->start <= value && rle->end >= value) 972 return (1); 973 } 974 return (0); 975} 976 977/* 978 * Wire device unit numbers based on resource matches in hints. 979 */ 980static void 981acpi_hint_device_unit(device_t acdev, device_t child, const char *name, 982 int *unitp) 983{ 984 const char *s; 985 long value; 986 int line, matches, unit; 987 988 /* 989 * Iterate over all the hints for the devices with the specified 990 * name to see if one's resources are a subset of this device. 991 */ 992 line = 0; 993 for (;;) { 994 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) 995 break; 996 997 /* Must have an "at" for acpi or isa. */ 998 resource_string_value(name, unit, "at", &s); 999 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 || 1000 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0)) 1001 continue; 1002 1003 /* 1004 * Check for matching resources. We must have at least one match. 1005 * Since I/O and memory resources cannot be shared, if we get a 1006 * match on either of those, ignore any mismatches in IRQs or DRQs. 1007 * 1008 * XXX: We may want to revisit this to be more lenient and wire 1009 * as long as it gets one match. 1010 */ 1011 matches = 0; 1012 if (resource_long_value(name, unit, "port", &value) == 0) { 1013 /* 1014 * Floppy drive controllers are notorious for having a 1015 * wide variety of resources not all of which include the 1016 * first port that is specified by the hint (typically 1017 * 0x3f0) (see the comment above fdc_isa_alloc_resources() 1018 * in fdc_isa.c). However, they do all seem to include 1019 * port + 2 (e.g. 0x3f2) so for a floppy device, look for 1020 * 'value + 2' in the port resources instead of the hint 1021 * value. 1022 */ 1023 if (strcmp(name, "fdc") == 0) 1024 value += 2; 1025 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) 1026 matches++; 1027 else 1028 continue; 1029 } 1030 if (resource_long_value(name, unit, "maddr", &value) == 0) { 1031 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value)) 1032 matches++; 1033 else 1034 continue; 1035 } 1036 if (matches > 0) 1037 goto matched; 1038 if (resource_long_value(name, unit, "irq", &value) == 0) { 1039 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) 1040 matches++; 1041 else 1042 continue; 1043 } 1044 if (resource_long_value(name, unit, "drq", &value) == 0) { 1045 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value)) 1046 matches++; 1047 else 1048 continue; 1049 } 1050 1051 matched: 1052 if (matches > 0) { 1053 /* We have a winner! */ 1054 *unitp = unit; 1055 break; 1056 } 1057 } 1058} 1059 1060/* 1061 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1062 * duplicates, we merge any in the sysresource attach routine. 1063 */ 1064static int 1065acpi_sysres_alloc(device_t dev) 1066{ 1067 struct resource *res; 1068 struct resource_list *rl; 1069 struct resource_list_entry *rle; 1070 struct rman *rm; 1071 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1072 device_t *children; 1073 int child_count, i; 1074 1075 /* 1076 * Probe/attach any sysresource devices. This would be unnecessary if we 1077 * had multi-pass probe/attach. 1078 */ 1079 if (device_get_children(dev, &children, &child_count) != 0) 1080 return (ENXIO); 1081 for (i = 0; i < child_count; i++) { 1082 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1083 device_probe_and_attach(children[i]); 1084 } 1085 free(children, M_TEMP); 1086 1087 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1088 STAILQ_FOREACH(rle, rl, link) { 1089 if (rle->res != NULL) { 1090 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1091 continue; 1092 } 1093 1094 /* Only memory and IO resources are valid here. */ 1095 switch (rle->type) { 1096 case SYS_RES_IOPORT: 1097 rm = &acpi_rman_io; 1098 break; 1099 case SYS_RES_MEMORY: 1100 rm = &acpi_rman_mem; 1101 break; 1102 default: 1103 continue; 1104 } 1105 1106 /* Pre-allocate resource and add to our rman pool. */ 1107 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1108 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 1109 if (res != NULL) { 1110 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1111 rle->res = res; 1112 } else 1113 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1114 rle->start, rle->count, rle->type); 1115 } 1116 return (0); 1117} 1118 1119static char *pcilink_ids[] = { "PNP0C0F", NULL }; 1120static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1121 1122/* 1123 * Reserve declared resources for devices found during attach once system 1124 * resources have been allocated. 1125 */ 1126static void 1127acpi_reserve_resources(device_t dev) 1128{ 1129 struct resource_list_entry *rle; 1130 struct resource_list *rl; 1131 struct acpi_device *ad; 1132 struct acpi_softc *sc; 1133 device_t *children; 1134 int child_count, i; 1135 1136 sc = device_get_softc(dev); 1137 if (device_get_children(dev, &children, &child_count) != 0) 1138 return; 1139 for (i = 0; i < child_count; i++) { 1140 ad = device_get_ivars(children[i]); 1141 rl = &ad->ad_rl; 1142 1143 /* Don't reserve system resources. */ 1144 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1145 continue; 1146 1147 STAILQ_FOREACH(rle, rl, link) { 1148 /* 1149 * Don't reserve IRQ resources. There are many sticky things 1150 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET 1151 * when using legacy routing). 1152 */ 1153 if (rle->type == SYS_RES_IRQ) 1154 continue; 1155 1156 /* 1157 * Don't reserve the resource if it is already allocated. 1158 * The acpi_ec(4) driver can allocate its resources early 1159 * if ECDT is present. 1160 */ 1161 if (rle->res != NULL) 1162 continue; 1163 1164 /* 1165 * Try to reserve the resource from our parent. If this 1166 * fails because the resource is a system resource, just 1167 * let it be. The resource range is already reserved so 1168 * that other devices will not use it. If the driver 1169 * needs to allocate the resource, then 1170 * acpi_alloc_resource() will sub-alloc from the system 1171 * resource. 1172 */ 1173 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid, 1174 rle->start, rle->end, rle->count, 0); 1175 } 1176 } 1177 free(children, M_TEMP); 1178 sc->acpi_resources_reserved = 1; 1179} 1180 1181static int 1182acpi_set_resource(device_t dev, device_t child, int type, int rid, 1183 u_long start, u_long count) 1184{ 1185 struct acpi_softc *sc = device_get_softc(dev); 1186 struct acpi_device *ad = device_get_ivars(child); 1187 struct resource_list *rl = &ad->ad_rl; 1188 u_long end; 1189 1190 /* Ignore IRQ resources for PCI link devices. */ 1191 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL) 1192 return (0); 1193 1194 /* If the resource is already allocated, fail. */ 1195 if (resource_list_busy(rl, type, rid)) 1196 return (EBUSY); 1197 1198 /* If the resource is already reserved, release it. */ 1199 if (resource_list_reserved(rl, type, rid)) 1200 resource_list_unreserve(rl, dev, child, type, rid); 1201 1202 /* Add the resource. */ 1203 end = (start + count - 1); 1204 resource_list_add(rl, type, rid, start, end, count); 1205 1206 /* Don't reserve resources until the system resources are allocated. */ 1207 if (!sc->acpi_resources_reserved) 1208 return (0); 1209 1210 /* Don't reserve system resources. */ 1211 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL) 1212 return (0); 1213 1214 /* 1215 * Don't reserve IRQ resources. There are many sticky things to 1216 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when 1217 * using legacy routing). 1218 */ 1219 if (type == SYS_RES_IRQ) 1220 return (0); 1221 1222 /* 1223 * Reserve the resource. 1224 * 1225 * XXX: Ignores failure for now. Failure here is probably a 1226 * BIOS/firmware bug? 1227 */ 1228 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0); 1229 return (0); 1230} 1231 1232static struct resource * 1233acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1234 u_long start, u_long end, u_long count, u_int flags) 1235{ 1236 ACPI_RESOURCE ares; 1237 struct acpi_device *ad; 1238 struct resource_list_entry *rle; 1239 struct resource_list *rl; 1240 struct resource *res; 1241 int isdefault = (start == 0UL && end == ~0UL); 1242 1243 /* 1244 * First attempt at allocating the resource. For direct children, 1245 * use resource_list_alloc() to handle reserved resources. For 1246 * other devices, pass the request up to our parent. 1247 */ 1248 if (bus == device_get_parent(child)) { 1249 ad = device_get_ivars(child); 1250 rl = &ad->ad_rl; 1251 1252 /* 1253 * Simulate the behavior of the ISA bus for direct children 1254 * devices. That is, if a non-default range is specified for 1255 * a resource that doesn't exist, use bus_set_resource() to 1256 * add the resource before allocating it. Note that these 1257 * resources will not be reserved. 1258 */ 1259 if (!isdefault && resource_list_find(rl, type, *rid) == NULL) 1260 resource_list_add(rl, type, *rid, start, end, count); 1261 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count, 1262 flags); 1263 if (res != NULL && type == SYS_RES_IRQ) { 1264 /* 1265 * Since bus_config_intr() takes immediate effect, we cannot 1266 * configure the interrupt associated with a device when we 1267 * parse the resources but have to defer it until a driver 1268 * actually allocates the interrupt via bus_alloc_resource(). 1269 * 1270 * XXX: Should we handle the lookup failing? 1271 */ 1272 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1273 acpi_config_intr(child, &ares); 1274 } 1275 1276 /* 1277 * If this is an allocation of the "default" range for a given 1278 * RID, fetch the exact bounds for this resource from the 1279 * resource list entry to try to allocate the range from the 1280 * system resource regions. 1281 */ 1282 if (res == NULL && isdefault) { 1283 rle = resource_list_find(rl, type, *rid); 1284 if (rle != NULL) { 1285 start = rle->start; 1286 end = rle->end; 1287 count = rle->count; 1288 } 1289 } 1290 } else 1291 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1292 start, end, count, flags); 1293 1294 /* 1295 * If the first attempt failed and this is an allocation of a 1296 * specific range, try to satisfy the request via a suballocation 1297 * from our system resource regions. 1298 */ 1299 if (res == NULL && start + count - 1 == end) 1300 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags); 1301 return (res); 1302} 1303 1304/* 1305 * Attempt to allocate a specific resource range from the system 1306 * resource ranges. Note that we only handle memory and I/O port 1307 * system resources. 1308 */ 1309struct resource * 1310acpi_alloc_sysres(device_t child, int type, int *rid, u_long start, u_long end, 1311 u_long count, u_int flags) 1312{ 1313 struct rman *rm; 1314 struct resource *res; 1315 1316 switch (type) { 1317 case SYS_RES_IOPORT: 1318 rm = &acpi_rman_io; 1319 break; 1320 case SYS_RES_MEMORY: 1321 rm = &acpi_rman_mem; 1322 break; 1323 default: 1324 return (NULL); 1325 } 1326 1327 KASSERT(start + count - 1 == end, ("wildcard resource range")); 1328 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1329 child); 1330 if (res == NULL) 1331 return (NULL); 1332 1333 rman_set_rid(res, *rid); 1334 1335 /* If requested, activate the resource using the parent's method. */ 1336 if (flags & RF_ACTIVE) 1337 if (bus_activate_resource(child, type, *rid, res) != 0) { 1338 rman_release_resource(res); 1339 return (NULL); 1340 } 1341 1342 return (res); 1343} 1344 1345static int 1346acpi_is_resource_managed(int type, struct resource *r) 1347{ 1348 1349 /* We only handle memory and IO resources through rman. */ 1350 switch (type) { 1351 case SYS_RES_IOPORT: 1352 return (rman_is_region_manager(r, &acpi_rman_io)); 1353 case SYS_RES_MEMORY: 1354 return (rman_is_region_manager(r, &acpi_rman_mem)); 1355 } 1356 return (0); 1357} 1358 1359static int 1360acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r, 1361 u_long start, u_long end) 1362{ 1363 1364 if (acpi_is_resource_managed(type, r)) 1365 return (rman_adjust_resource(r, start, end)); 1366 return (bus_generic_adjust_resource(bus, child, type, r, start, end)); 1367} 1368 1369static int 1370acpi_release_resource(device_t bus, device_t child, int type, int rid, 1371 struct resource *r) 1372{ 1373 int ret; 1374 1375 /* 1376 * If this resource belongs to one of our internal managers, 1377 * deactivate it and release it to the local pool. 1378 */ 1379 if (acpi_is_resource_managed(type, r)) { 1380 if (rman_get_flags(r) & RF_ACTIVE) { 1381 ret = bus_deactivate_resource(child, type, rid, r); 1382 if (ret != 0) 1383 return (ret); 1384 } 1385 return (rman_release_resource(r)); 1386 } 1387 1388 return (bus_generic_rl_release_resource(bus, child, type, rid, r)); 1389} 1390 1391static void 1392acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1393{ 1394 struct resource_list *rl; 1395 1396 rl = acpi_get_rlist(bus, child); 1397 if (resource_list_busy(rl, type, rid)) { 1398 device_printf(bus, "delete_resource: Resource still owned by child" 1399 " (type=%d, rid=%d)\n", type, rid); 1400 return; 1401 } 1402 resource_list_unreserve(rl, bus, child, type, rid); 1403 resource_list_delete(rl, type, rid); 1404} 1405 1406/* Allocate an IO port or memory resource, given its GAS. */ 1407int 1408acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1409 struct resource **res, u_int flags) 1410{ 1411 int error, res_type; 1412 1413 error = ENOMEM; 1414 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1415 return (EINVAL); 1416 1417 /* We only support memory and IO spaces. */ 1418 switch (gas->SpaceId) { 1419 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1420 res_type = SYS_RES_MEMORY; 1421 break; 1422 case ACPI_ADR_SPACE_SYSTEM_IO: 1423 res_type = SYS_RES_IOPORT; 1424 break; 1425 default: 1426 return (EOPNOTSUPP); 1427 } 1428 1429 /* 1430 * If the register width is less than 8, assume the BIOS author means 1431 * it is a bit field and just allocate a byte. 1432 */ 1433 if (gas->BitWidth && gas->BitWidth < 8) 1434 gas->BitWidth = 8; 1435 1436 /* Validate the address after we're sure we support the space. */ 1437 if (gas->Address == 0 || gas->BitWidth == 0) 1438 return (EINVAL); 1439 1440 bus_set_resource(dev, res_type, *rid, gas->Address, 1441 gas->BitWidth / 8); 1442 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1443 if (*res != NULL) { 1444 *type = res_type; 1445 error = 0; 1446 } else 1447 bus_delete_resource(dev, res_type, *rid); 1448 1449 return (error); 1450} 1451 1452/* Probe _HID and _CID for compatible ISA PNP ids. */ 1453static uint32_t 1454acpi_isa_get_logicalid(device_t dev) 1455{ 1456 ACPI_DEVICE_INFO *devinfo; 1457 ACPI_HANDLE h; 1458 uint32_t pnpid; 1459 1460 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1461 1462 /* Fetch and validate the HID. */ 1463 if ((h = acpi_get_handle(dev)) == NULL || 1464 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1465 return_VALUE (0); 1466 1467 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 && 1468 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ? 1469 PNP_EISAID(devinfo->HardwareId.String) : 0; 1470 AcpiOsFree(devinfo); 1471 1472 return_VALUE (pnpid); 1473} 1474 1475static int 1476acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1477{ 1478 ACPI_DEVICE_INFO *devinfo; 1479 ACPI_DEVICE_ID *ids; 1480 ACPI_HANDLE h; 1481 uint32_t *pnpid; 1482 int i, valid; 1483 1484 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1485 1486 pnpid = cids; 1487 1488 /* Fetch and validate the CID */ 1489 if ((h = acpi_get_handle(dev)) == NULL || 1490 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1491 return_VALUE (0); 1492 1493 if ((devinfo->Valid & ACPI_VALID_CID) == 0) { 1494 AcpiOsFree(devinfo); 1495 return_VALUE (0); 1496 } 1497 1498 if (devinfo->CompatibleIdList.Count < count) 1499 count = devinfo->CompatibleIdList.Count; 1500 ids = devinfo->CompatibleIdList.Ids; 1501 for (i = 0, valid = 0; i < count; i++) 1502 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE && 1503 strncmp(ids[i].String, "PNP", 3) == 0) { 1504 *pnpid++ = PNP_EISAID(ids[i].String); 1505 valid++; 1506 } 1507 AcpiOsFree(devinfo); 1508 1509 return_VALUE (valid); 1510} 1511 1512static char * 1513acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1514{ 1515 ACPI_HANDLE h; 1516 ACPI_OBJECT_TYPE t; 1517 int i; 1518 1519 h = acpi_get_handle(dev); 1520 if (ids == NULL || h == NULL) 1521 return (NULL); 1522 t = acpi_get_type(dev); 1523 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR) 1524 return (NULL); 1525 1526 /* Try to match one of the array of IDs with a HID or CID. */ 1527 for (i = 0; ids[i] != NULL; i++) { 1528 if (acpi_MatchHid(h, ids[i])) 1529 return (ids[i]); 1530 } 1531 return (NULL); 1532} 1533 1534static ACPI_STATUS 1535acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1536 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1537{ 1538 ACPI_HANDLE h; 1539 1540 if (dev == NULL) 1541 h = ACPI_ROOT_OBJECT; 1542 else if ((h = acpi_get_handle(dev)) == NULL) 1543 return (AE_BAD_PARAMETER); 1544 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1545} 1546 1547int 1548acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1549{ 1550 struct acpi_softc *sc; 1551 ACPI_HANDLE handle; 1552 ACPI_STATUS status; 1553 char sxd[8]; 1554 1555 handle = acpi_get_handle(dev); 1556 1557 /* 1558 * XXX If we find these devices, don't try to power them down. 1559 * The serial and IRDA ports on my T23 hang the system when 1560 * set to D3 and it appears that such legacy devices may 1561 * need special handling in their drivers. 1562 */ 1563 if (dstate == NULL || handle == NULL || 1564 acpi_MatchHid(handle, "PNP0500") || 1565 acpi_MatchHid(handle, "PNP0501") || 1566 acpi_MatchHid(handle, "PNP0502") || 1567 acpi_MatchHid(handle, "PNP0510") || 1568 acpi_MatchHid(handle, "PNP0511")) 1569 return (ENXIO); 1570 1571 /* 1572 * Override next state with the value from _SxD, if present. 1573 * Note illegal _S0D is evaluated because some systems expect this. 1574 */ 1575 sc = device_get_softc(bus); 1576 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1577 status = acpi_GetInteger(handle, sxd, dstate); 1578 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 1579 device_printf(dev, "failed to get %s on %s: %s\n", sxd, 1580 acpi_name(handle), AcpiFormatException(status)); 1581 return (ENXIO); 1582 } 1583 1584 return (0); 1585} 1586 1587/* Callback arg for our implementation of walking the namespace. */ 1588struct acpi_device_scan_ctx { 1589 acpi_scan_cb_t user_fn; 1590 void *arg; 1591 ACPI_HANDLE parent; 1592}; 1593 1594static ACPI_STATUS 1595acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1596{ 1597 struct acpi_device_scan_ctx *ctx; 1598 device_t dev, old_dev; 1599 ACPI_STATUS status; 1600 ACPI_OBJECT_TYPE type; 1601 1602 /* 1603 * Skip this device if we think we'll have trouble with it or it is 1604 * the parent where the scan began. 1605 */ 1606 ctx = (struct acpi_device_scan_ctx *)arg; 1607 if (acpi_avoid(h) || h == ctx->parent) 1608 return (AE_OK); 1609 1610 /* If this is not a valid device type (e.g., a method), skip it. */ 1611 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1612 return (AE_OK); 1613 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1614 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1615 return (AE_OK); 1616 1617 /* 1618 * Call the user function with the current device. If it is unchanged 1619 * afterwards, return. Otherwise, we update the handle to the new dev. 1620 */ 1621 old_dev = acpi_get_device(h); 1622 dev = old_dev; 1623 status = ctx->user_fn(h, &dev, level, ctx->arg); 1624 if (ACPI_FAILURE(status) || old_dev == dev) 1625 return (status); 1626 1627 /* Remove the old child and its connection to the handle. */ 1628 if (old_dev != NULL) { 1629 device_delete_child(device_get_parent(old_dev), old_dev); 1630 AcpiDetachData(h, acpi_fake_objhandler); 1631 } 1632 1633 /* Recreate the handle association if the user created a device. */ 1634 if (dev != NULL) 1635 AcpiAttachData(h, acpi_fake_objhandler, dev); 1636 1637 return (AE_OK); 1638} 1639 1640static ACPI_STATUS 1641acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1642 acpi_scan_cb_t user_fn, void *arg) 1643{ 1644 ACPI_HANDLE h; 1645 struct acpi_device_scan_ctx ctx; 1646 1647 if (acpi_disabled("children")) 1648 return (AE_OK); 1649 1650 if (dev == NULL) 1651 h = ACPI_ROOT_OBJECT; 1652 else if ((h = acpi_get_handle(dev)) == NULL) 1653 return (AE_BAD_PARAMETER); 1654 ctx.user_fn = user_fn; 1655 ctx.arg = arg; 1656 ctx.parent = h; 1657 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1658 acpi_device_scan_cb, NULL, &ctx, NULL)); 1659} 1660 1661/* 1662 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1663 * device power states since it's close enough to ACPI. 1664 */ 1665static int 1666acpi_set_powerstate(device_t child, int state) 1667{ 1668 ACPI_HANDLE h; 1669 ACPI_STATUS status; 1670 1671 h = acpi_get_handle(child); 1672 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) 1673 return (EINVAL); 1674 if (h == NULL) 1675 return (0); 1676 1677 /* Ignore errors if the power methods aren't present. */ 1678 status = acpi_pwr_switch_consumer(h, state); 1679 if (ACPI_SUCCESS(status)) { 1680 if (bootverbose) 1681 device_printf(child, "set ACPI power state D%d on %s\n", 1682 state, acpi_name(h)); 1683 } else if (status != AE_NOT_FOUND) 1684 device_printf(child, 1685 "failed to set ACPI power state D%d on %s: %s\n", state, 1686 acpi_name(h), AcpiFormatException(status)); 1687 1688 return (0); 1689} 1690 1691static int 1692acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1693{ 1694 int result, cid_count, i; 1695 uint32_t lid, cids[8]; 1696 1697 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1698 1699 /* 1700 * ISA-style drivers attached to ACPI may persist and 1701 * probe manually if we return ENOENT. We never want 1702 * that to happen, so don't ever return it. 1703 */ 1704 result = ENXIO; 1705 1706 /* Scan the supplied IDs for a match */ 1707 lid = acpi_isa_get_logicalid(child); 1708 cid_count = acpi_isa_get_compatid(child, cids, 8); 1709 while (ids && ids->ip_id) { 1710 if (lid == ids->ip_id) { 1711 result = 0; 1712 goto out; 1713 } 1714 for (i = 0; i < cid_count; i++) { 1715 if (cids[i] == ids->ip_id) { 1716 result = 0; 1717 goto out; 1718 } 1719 } 1720 ids++; 1721 } 1722 1723 out: 1724 if (result == 0 && ids->ip_desc) 1725 device_set_desc(child, ids->ip_desc); 1726 1727 return_VALUE (result); 1728} 1729 1730#if defined(__i386__) || defined(__amd64__) 1731/* 1732 * Look for a MCFG table. If it is present, use the settings for 1733 * domain (segment) 0 to setup PCI config space access via the memory 1734 * map. 1735 */ 1736static void 1737acpi_enable_pcie(void) 1738{ 1739 ACPI_TABLE_HEADER *hdr; 1740 ACPI_MCFG_ALLOCATION *alloc, *end; 1741 ACPI_STATUS status; 1742 1743 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1744 if (ACPI_FAILURE(status)) 1745 return; 1746 1747 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1748 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1749 while (alloc < end) { 1750 if (alloc->PciSegment == 0) { 1751 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1752 alloc->EndBusNumber); 1753 return; 1754 } 1755 alloc++; 1756 } 1757} 1758#endif 1759 1760/* 1761 * Scan all of the ACPI namespace and attach child devices. 1762 * 1763 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1764 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1765 * However, in violation of the spec, some systems place their PCI link 1766 * devices in \, so we have to walk the whole namespace. We check the 1767 * type of namespace nodes, so this should be ok. 1768 */ 1769static void 1770acpi_probe_children(device_t bus) 1771{ 1772 1773 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1774 1775 /* 1776 * Scan the namespace and insert placeholders for all the devices that 1777 * we find. We also probe/attach any early devices. 1778 * 1779 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1780 * we want to create nodes for all devices, not just those that are 1781 * currently present. (This assumes that we don't want to create/remove 1782 * devices as they appear, which might be smarter.) 1783 */ 1784 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1785 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1786 NULL, bus, NULL); 1787 1788 /* Pre-allocate resources for our rman from any sysresource devices. */ 1789 acpi_sysres_alloc(bus); 1790 1791 /* Reserve resources already allocated to children. */ 1792 acpi_reserve_resources(bus); 1793 1794 /* Create any static children by calling device identify methods. */ 1795 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1796 bus_generic_probe(bus); 1797 1798 /* Probe/attach all children, created statically and from the namespace. */ 1799 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n")); 1800 bus_generic_attach(bus); 1801 1802 /* Attach wake sysctls. */ 1803 acpi_wake_sysctl_walk(bus); 1804 1805 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1806 return_VOID; 1807} 1808 1809/* 1810 * Determine the probe order for a given device. 1811 */ 1812static void 1813acpi_probe_order(ACPI_HANDLE handle, int *order) 1814{ 1815 ACPI_OBJECT_TYPE type; 1816 1817 /* 1818 * 0. CPUs 1819 * 1. I/O port and memory system resource holders 1820 * 2. Clocks and timers (to handle early accesses) 1821 * 3. Embedded controllers (to handle early accesses) 1822 * 4. PCI Link Devices 1823 */ 1824 AcpiGetType(handle, &type); 1825 if (type == ACPI_TYPE_PROCESSOR) 1826 *order = 0; 1827 else if (acpi_MatchHid(handle, "PNP0C01") || 1828 acpi_MatchHid(handle, "PNP0C02")) 1829 *order = 1; 1830 else if (acpi_MatchHid(handle, "PNP0100") || 1831 acpi_MatchHid(handle, "PNP0103") || 1832 acpi_MatchHid(handle, "PNP0B00")) 1833 *order = 2; 1834 else if (acpi_MatchHid(handle, "PNP0C09")) 1835 *order = 3; 1836 else if (acpi_MatchHid(handle, "PNP0C0F")) 1837 *order = 4; 1838} 1839 1840/* 1841 * Evaluate a child device and determine whether we might attach a device to 1842 * it. 1843 */ 1844static ACPI_STATUS 1845acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1846{ 1847 struct acpi_prw_data prw; 1848 ACPI_OBJECT_TYPE type; 1849 ACPI_HANDLE h; 1850 device_t bus, child; 1851 char *handle_str; 1852 int order; 1853 1854 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1855 1856 if (acpi_disabled("children")) 1857 return_ACPI_STATUS (AE_OK); 1858 1859 /* Skip this device if we think we'll have trouble with it. */ 1860 if (acpi_avoid(handle)) 1861 return_ACPI_STATUS (AE_OK); 1862 1863 bus = (device_t)context; 1864 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1865 handle_str = acpi_name(handle); 1866 switch (type) { 1867 case ACPI_TYPE_DEVICE: 1868 /* 1869 * Since we scan from \, be sure to skip system scope objects. 1870 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1871 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1872 * during the intialization and \_TZ_ is to support Notify() on it. 1873 */ 1874 if (strcmp(handle_str, "\\_SB_") == 0 || 1875 strcmp(handle_str, "\\_TZ_") == 0) 1876 break; 1877 if (acpi_parse_prw(handle, &prw) == 0) 1878 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1879 1880 /* 1881 * Ignore devices that do not have a _HID or _CID. They should 1882 * be discovered by other buses (e.g. the PCI bus driver). 1883 */ 1884 if (!acpi_has_hid(handle)) 1885 break; 1886 /* FALLTHROUGH */ 1887 case ACPI_TYPE_PROCESSOR: 1888 case ACPI_TYPE_THERMAL: 1889 case ACPI_TYPE_POWER: 1890 /* 1891 * Create a placeholder device for this node. Sort the 1892 * placeholder so that the probe/attach passes will run 1893 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1894 * are reserved for special objects (i.e., system 1895 * resources). 1896 */ 1897 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1898 order = level * 10 + ACPI_DEV_BASE_ORDER; 1899 acpi_probe_order(handle, &order); 1900 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1901 if (child == NULL) 1902 break; 1903 1904 /* Associate the handle with the device_t and vice versa. */ 1905 acpi_set_handle(child, handle); 1906 AcpiAttachData(handle, acpi_fake_objhandler, child); 1907 1908 /* 1909 * Check that the device is present. If it's not present, 1910 * leave it disabled (so that we have a device_t attached to 1911 * the handle, but we don't probe it). 1912 * 1913 * XXX PCI link devices sometimes report "present" but not 1914 * "functional" (i.e. if disabled). Go ahead and probe them 1915 * anyway since we may enable them later. 1916 */ 1917 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1918 /* Never disable PCI link devices. */ 1919 if (acpi_MatchHid(handle, "PNP0C0F")) 1920 break; 1921 /* 1922 * Docking stations should remain enabled since the system 1923 * may be undocked at boot. 1924 */ 1925 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1926 break; 1927 1928 device_disable(child); 1929 break; 1930 } 1931 1932 /* 1933 * Get the device's resource settings and attach them. 1934 * Note that if the device has _PRS but no _CRS, we need 1935 * to decide when it's appropriate to try to configure the 1936 * device. Ignore the return value here; it's OK for the 1937 * device not to have any resources. 1938 */ 1939 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1940 break; 1941 } 1942 } 1943 1944 return_ACPI_STATUS (AE_OK); 1945} 1946 1947/* 1948 * AcpiAttachData() requires an object handler but never uses it. This is a 1949 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1950 */ 1951void 1952acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1953{ 1954} 1955 1956static void 1957acpi_shutdown_final(void *arg, int howto) 1958{ 1959 struct acpi_softc *sc = (struct acpi_softc *)arg; 1960 ACPI_STATUS status; 1961 1962 /* 1963 * XXX Shutdown code should only run on the BSP (cpuid 0). 1964 * Some chipsets do not power off the system correctly if called from 1965 * an AP. 1966 */ 1967 if ((howto & RB_POWEROFF) != 0) { 1968 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1969 if (ACPI_FAILURE(status)) { 1970 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1971 AcpiFormatException(status)); 1972 return; 1973 } 1974 device_printf(sc->acpi_dev, "Powering system off\n"); 1975 ACPI_DISABLE_IRQS(); 1976 status = AcpiEnterSleepState(ACPI_STATE_S5); 1977 if (ACPI_FAILURE(status)) 1978 device_printf(sc->acpi_dev, "power-off failed - %s\n", 1979 AcpiFormatException(status)); 1980 else { 1981 DELAY(1000000); 1982 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 1983 } 1984 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 1985 /* Reboot using the reset register. */ 1986 status = AcpiReset(); 1987 if (ACPI_SUCCESS(status)) { 1988 DELAY(1000000); 1989 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 1990 } else if (status != AE_NOT_EXIST) 1991 device_printf(sc->acpi_dev, "reset failed - %s\n", 1992 AcpiFormatException(status)); 1993 } else if (sc->acpi_do_disable && panicstr == NULL) { 1994 /* 1995 * Only disable ACPI if the user requested. On some systems, writing 1996 * the disable value to SMI_CMD hangs the system. 1997 */ 1998 device_printf(sc->acpi_dev, "Shutting down\n"); 1999 AcpiTerminate(); 2000 } 2001} 2002 2003static void 2004acpi_enable_fixed_events(struct acpi_softc *sc) 2005{ 2006 static int first_time = 1; 2007 2008 /* Enable and clear fixed events and install handlers. */ 2009 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 2010 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2011 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 2012 acpi_event_power_button_sleep, sc); 2013 if (first_time) 2014 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 2015 } 2016 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 2017 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 2018 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 2019 acpi_event_sleep_button_sleep, sc); 2020 if (first_time) 2021 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 2022 } 2023 2024 first_time = 0; 2025} 2026 2027/* 2028 * Returns true if the device is actually present and should 2029 * be attached to. This requires the present, enabled, UI-visible 2030 * and diagnostics-passed bits to be set. 2031 */ 2032BOOLEAN 2033acpi_DeviceIsPresent(device_t dev) 2034{ 2035 ACPI_DEVICE_INFO *devinfo; 2036 ACPI_HANDLE h; 2037 BOOLEAN present; 2038 2039 if ((h = acpi_get_handle(dev)) == NULL || 2040 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2041 return (FALSE); 2042 2043 /* If no _STA method, must be present */ 2044 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2045 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2046 2047 AcpiOsFree(devinfo); 2048 return (present); 2049} 2050 2051/* 2052 * Returns true if the battery is actually present and inserted. 2053 */ 2054BOOLEAN 2055acpi_BatteryIsPresent(device_t dev) 2056{ 2057 ACPI_DEVICE_INFO *devinfo; 2058 ACPI_HANDLE h; 2059 BOOLEAN present; 2060 2061 if ((h = acpi_get_handle(dev)) == NULL || 2062 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2063 return (FALSE); 2064 2065 /* If no _STA method, must be present */ 2066 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2067 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2068 2069 AcpiOsFree(devinfo); 2070 return (present); 2071} 2072 2073/* 2074 * Returns true if a device has at least one valid device ID. 2075 */ 2076static BOOLEAN 2077acpi_has_hid(ACPI_HANDLE h) 2078{ 2079 ACPI_DEVICE_INFO *devinfo; 2080 BOOLEAN ret; 2081 2082 if (h == NULL || 2083 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2084 return (FALSE); 2085 2086 ret = FALSE; 2087 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 2088 ret = TRUE; 2089 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2090 if (devinfo->CompatibleIdList.Count > 0) 2091 ret = TRUE; 2092 2093 AcpiOsFree(devinfo); 2094 return (ret); 2095} 2096 2097/* 2098 * Match a HID string against a handle 2099 */ 2100BOOLEAN 2101acpi_MatchHid(ACPI_HANDLE h, const char *hid) 2102{ 2103 ACPI_DEVICE_INFO *devinfo; 2104 BOOLEAN ret; 2105 int i; 2106 2107 if (hid == NULL || h == NULL || 2108 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2109 return (FALSE); 2110 2111 ret = FALSE; 2112 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 2113 strcmp(hid, devinfo->HardwareId.String) == 0) 2114 ret = TRUE; 2115 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2116 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 2117 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 2118 ret = TRUE; 2119 break; 2120 } 2121 } 2122 2123 AcpiOsFree(devinfo); 2124 return (ret); 2125} 2126 2127/* 2128 * Return the handle of a named object within our scope, ie. that of (parent) 2129 * or one if its parents. 2130 */ 2131ACPI_STATUS 2132acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2133{ 2134 ACPI_HANDLE r; 2135 ACPI_STATUS status; 2136 2137 /* Walk back up the tree to the root */ 2138 for (;;) { 2139 status = AcpiGetHandle(parent, path, &r); 2140 if (ACPI_SUCCESS(status)) { 2141 *result = r; 2142 return (AE_OK); 2143 } 2144 /* XXX Return error here? */ 2145 if (status != AE_NOT_FOUND) 2146 return (AE_OK); 2147 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2148 return (AE_NOT_FOUND); 2149 parent = r; 2150 } 2151} 2152 2153/* 2154 * Allocate a buffer with a preset data size. 2155 */ 2156ACPI_BUFFER * 2157acpi_AllocBuffer(int size) 2158{ 2159 ACPI_BUFFER *buf; 2160 2161 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2162 return (NULL); 2163 buf->Length = size; 2164 buf->Pointer = (void *)(buf + 1); 2165 return (buf); 2166} 2167 2168ACPI_STATUS 2169acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2170{ 2171 ACPI_OBJECT arg1; 2172 ACPI_OBJECT_LIST args; 2173 2174 arg1.Type = ACPI_TYPE_INTEGER; 2175 arg1.Integer.Value = number; 2176 args.Count = 1; 2177 args.Pointer = &arg1; 2178 2179 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2180} 2181 2182/* 2183 * Evaluate a path that should return an integer. 2184 */ 2185ACPI_STATUS 2186acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2187{ 2188 ACPI_STATUS status; 2189 ACPI_BUFFER buf; 2190 ACPI_OBJECT param; 2191 2192 if (handle == NULL) 2193 handle = ACPI_ROOT_OBJECT; 2194 2195 /* 2196 * Assume that what we've been pointed at is an Integer object, or 2197 * a method that will return an Integer. 2198 */ 2199 buf.Pointer = ¶m; 2200 buf.Length = sizeof(param); 2201 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2202 if (ACPI_SUCCESS(status)) { 2203 if (param.Type == ACPI_TYPE_INTEGER) 2204 *number = param.Integer.Value; 2205 else 2206 status = AE_TYPE; 2207 } 2208 2209 /* 2210 * In some applications, a method that's expected to return an Integer 2211 * may instead return a Buffer (probably to simplify some internal 2212 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2213 * convert it into an Integer as best we can. 2214 * 2215 * This is a hack. 2216 */ 2217 if (status == AE_BUFFER_OVERFLOW) { 2218 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2219 status = AE_NO_MEMORY; 2220 } else { 2221 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2222 if (ACPI_SUCCESS(status)) 2223 status = acpi_ConvertBufferToInteger(&buf, number); 2224 AcpiOsFree(buf.Pointer); 2225 } 2226 } 2227 return (status); 2228} 2229 2230ACPI_STATUS 2231acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2232{ 2233 ACPI_OBJECT *p; 2234 UINT8 *val; 2235 int i; 2236 2237 p = (ACPI_OBJECT *)bufp->Pointer; 2238 if (p->Type == ACPI_TYPE_INTEGER) { 2239 *number = p->Integer.Value; 2240 return (AE_OK); 2241 } 2242 if (p->Type != ACPI_TYPE_BUFFER) 2243 return (AE_TYPE); 2244 if (p->Buffer.Length > sizeof(int)) 2245 return (AE_BAD_DATA); 2246 2247 *number = 0; 2248 val = p->Buffer.Pointer; 2249 for (i = 0; i < p->Buffer.Length; i++) 2250 *number += val[i] << (i * 8); 2251 return (AE_OK); 2252} 2253 2254/* 2255 * Iterate over the elements of an a package object, calling the supplied 2256 * function for each element. 2257 * 2258 * XXX possible enhancement might be to abort traversal on error. 2259 */ 2260ACPI_STATUS 2261acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2262 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2263{ 2264 ACPI_OBJECT *comp; 2265 int i; 2266 2267 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2268 return (AE_BAD_PARAMETER); 2269 2270 /* Iterate over components */ 2271 i = 0; 2272 comp = pkg->Package.Elements; 2273 for (; i < pkg->Package.Count; i++, comp++) 2274 func(comp, arg); 2275 2276 return (AE_OK); 2277} 2278 2279/* 2280 * Find the (index)th resource object in a set. 2281 */ 2282ACPI_STATUS 2283acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2284{ 2285 ACPI_RESOURCE *rp; 2286 int i; 2287 2288 rp = (ACPI_RESOURCE *)buf->Pointer; 2289 i = index; 2290 while (i-- > 0) { 2291 /* Range check */ 2292 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2293 return (AE_BAD_PARAMETER); 2294 2295 /* Check for terminator */ 2296 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2297 return (AE_NOT_FOUND); 2298 rp = ACPI_NEXT_RESOURCE(rp); 2299 } 2300 if (resp != NULL) 2301 *resp = rp; 2302 2303 return (AE_OK); 2304} 2305 2306/* 2307 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2308 * 2309 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2310 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2311 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2312 * resources. 2313 */ 2314#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2315 2316ACPI_STATUS 2317acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2318{ 2319 ACPI_RESOURCE *rp; 2320 void *newp; 2321 2322 /* Initialise the buffer if necessary. */ 2323 if (buf->Pointer == NULL) { 2324 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2325 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2326 return (AE_NO_MEMORY); 2327 rp = (ACPI_RESOURCE *)buf->Pointer; 2328 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2329 rp->Length = 0; 2330 } 2331 if (res == NULL) 2332 return (AE_OK); 2333 2334 /* 2335 * Scan the current buffer looking for the terminator. 2336 * This will either find the terminator or hit the end 2337 * of the buffer and return an error. 2338 */ 2339 rp = (ACPI_RESOURCE *)buf->Pointer; 2340 for (;;) { 2341 /* Range check, don't go outside the buffer */ 2342 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2343 return (AE_BAD_PARAMETER); 2344 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2345 break; 2346 rp = ACPI_NEXT_RESOURCE(rp); 2347 } 2348 2349 /* 2350 * Check the size of the buffer and expand if required. 2351 * 2352 * Required size is: 2353 * size of existing resources before terminator + 2354 * size of new resource and header + 2355 * size of terminator. 2356 * 2357 * Note that this loop should really only run once, unless 2358 * for some reason we are stuffing a *really* huge resource. 2359 */ 2360 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2361 res->Length + ACPI_RS_SIZE_NO_DATA + 2362 ACPI_RS_SIZE_MIN) >= buf->Length) { 2363 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2364 return (AE_NO_MEMORY); 2365 bcopy(buf->Pointer, newp, buf->Length); 2366 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2367 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2368 AcpiOsFree(buf->Pointer); 2369 buf->Pointer = newp; 2370 buf->Length += buf->Length; 2371 } 2372 2373 /* Insert the new resource. */ 2374 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2375 2376 /* And add the terminator. */ 2377 rp = ACPI_NEXT_RESOURCE(rp); 2378 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2379 rp->Length = 0; 2380 2381 return (AE_OK); 2382} 2383 2384/* 2385 * Set interrupt model. 2386 */ 2387ACPI_STATUS 2388acpi_SetIntrModel(int model) 2389{ 2390 2391 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2392} 2393 2394/* 2395 * Walk subtables of a table and call a callback routine for each 2396 * subtable. The caller should provide the first subtable and a 2397 * pointer to the end of the table. This can be used to walk tables 2398 * such as MADT and SRAT that use subtable entries. 2399 */ 2400void 2401acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler, 2402 void *arg) 2403{ 2404 ACPI_SUBTABLE_HEADER *entry; 2405 2406 for (entry = first; (void *)entry < end; ) { 2407 /* Avoid an infinite loop if we hit a bogus entry. */ 2408 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER)) 2409 return; 2410 2411 handler(entry, arg); 2412 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length); 2413 } 2414} 2415 2416/* 2417 * DEPRECATED. This interface has serious deficiencies and will be 2418 * removed. 2419 * 2420 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2421 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2422 */ 2423ACPI_STATUS 2424acpi_SetSleepState(struct acpi_softc *sc, int state) 2425{ 2426 static int once; 2427 2428 if (!once) { 2429 device_printf(sc->acpi_dev, 2430"warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2431 once = 1; 2432 } 2433 return (acpi_EnterSleepState(sc, state)); 2434} 2435 2436#if defined(__amd64__) || defined(__i386__) 2437static void 2438acpi_sleep_force(void *arg) 2439{ 2440 struct acpi_softc *sc = (struct acpi_softc *)arg; 2441 2442 device_printf(sc->acpi_dev, 2443 "suspend request timed out, forcing sleep now\n"); 2444 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2445 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2446 sc->acpi_next_sstate); 2447} 2448#endif 2449 2450/* 2451 * Request that the system enter the given suspend state. All /dev/apm 2452 * devices and devd(8) will be notified. Userland then has a chance to 2453 * save state and acknowledge the request. The system sleeps once all 2454 * acks are in. 2455 */ 2456int 2457acpi_ReqSleepState(struct acpi_softc *sc, int state) 2458{ 2459#if defined(__amd64__) || defined(__i386__) 2460 struct apm_clone_data *clone; 2461 ACPI_STATUS status; 2462 2463 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2464 return (EINVAL); 2465 if (!acpi_sleep_states[state]) 2466 return (EOPNOTSUPP); 2467 2468 ACPI_LOCK(acpi); 2469 2470 /* If a suspend request is already in progress, just return. */ 2471 if (sc->acpi_next_sstate != 0) { 2472 ACPI_UNLOCK(acpi); 2473 return (0); 2474 } 2475 2476 /* S5 (soft-off) should be entered directly with no waiting. */ 2477 if (state == ACPI_STATE_S5) { 2478 ACPI_UNLOCK(acpi); 2479 status = acpi_EnterSleepState(sc, state); 2480 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2481 } 2482 2483 /* Record the pending state and notify all apm devices. */ 2484 sc->acpi_next_sstate = state; 2485 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2486 clone->notify_status = APM_EV_NONE; 2487 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2488 selwakeuppri(&clone->sel_read, PZERO); 2489 KNOTE_LOCKED(&clone->sel_read.si_note, 0); 2490 } 2491 } 2492 2493 /* If devd(8) is not running, immediately enter the sleep state. */ 2494 if (!devctl_process_running()) { 2495 ACPI_UNLOCK(acpi); 2496 status = acpi_EnterSleepState(sc, state); 2497 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2498 } 2499 2500 /* 2501 * Set a timeout to fire if userland doesn't ack the suspend request 2502 * in time. This way we still eventually go to sleep if we were 2503 * overheating or running low on battery, even if userland is hung. 2504 * We cancel this timeout once all userland acks are in or the 2505 * suspend request is aborted. 2506 */ 2507 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2508 ACPI_UNLOCK(acpi); 2509 2510 /* Now notify devd(8) also. */ 2511 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2512 2513 return (0); 2514#else 2515 /* This platform does not support acpi suspend/resume. */ 2516 return (EOPNOTSUPP); 2517#endif 2518} 2519 2520/* 2521 * Acknowledge (or reject) a pending sleep state. The caller has 2522 * prepared for suspend and is now ready for it to proceed. If the 2523 * error argument is non-zero, it indicates suspend should be cancelled 2524 * and gives an errno value describing why. Once all votes are in, 2525 * we suspend the system. 2526 */ 2527int 2528acpi_AckSleepState(struct apm_clone_data *clone, int error) 2529{ 2530#if defined(__amd64__) || defined(__i386__) 2531 struct acpi_softc *sc; 2532 int ret, sleeping; 2533 2534 /* If no pending sleep state, return an error. */ 2535 ACPI_LOCK(acpi); 2536 sc = clone->acpi_sc; 2537 if (sc->acpi_next_sstate == 0) { 2538 ACPI_UNLOCK(acpi); 2539 return (ENXIO); 2540 } 2541 2542 /* Caller wants to abort suspend process. */ 2543 if (error) { 2544 sc->acpi_next_sstate = 0; 2545 callout_stop(&sc->susp_force_to); 2546 device_printf(sc->acpi_dev, 2547 "listener on %s cancelled the pending suspend\n", 2548 devtoname(clone->cdev)); 2549 ACPI_UNLOCK(acpi); 2550 return (0); 2551 } 2552 2553 /* 2554 * Mark this device as acking the suspend request. Then, walk through 2555 * all devices, seeing if they agree yet. We only count devices that 2556 * are writable since read-only devices couldn't ack the request. 2557 */ 2558 sleeping = TRUE; 2559 clone->notify_status = APM_EV_ACKED; 2560 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2561 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2562 clone->notify_status != APM_EV_ACKED) { 2563 sleeping = FALSE; 2564 break; 2565 } 2566 } 2567 2568 /* If all devices have voted "yes", we will suspend now. */ 2569 if (sleeping) 2570 callout_stop(&sc->susp_force_to); 2571 ACPI_UNLOCK(acpi); 2572 ret = 0; 2573 if (sleeping) { 2574 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2575 ret = ENODEV; 2576 } 2577 return (ret); 2578#else 2579 /* This platform does not support acpi suspend/resume. */ 2580 return (EOPNOTSUPP); 2581#endif 2582} 2583 2584static void 2585acpi_sleep_enable(void *arg) 2586{ 2587 struct acpi_softc *sc = (struct acpi_softc *)arg; 2588 2589 /* Reschedule if the system is not fully up and running. */ 2590 if (!AcpiGbl_SystemAwakeAndRunning) { 2591 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2592 return; 2593 } 2594 2595 ACPI_LOCK(acpi); 2596 sc->acpi_sleep_disabled = FALSE; 2597 ACPI_UNLOCK(acpi); 2598} 2599 2600static ACPI_STATUS 2601acpi_sleep_disable(struct acpi_softc *sc) 2602{ 2603 ACPI_STATUS status; 2604 2605 /* Fail if the system is not fully up and running. */ 2606 if (!AcpiGbl_SystemAwakeAndRunning) 2607 return (AE_ERROR); 2608 2609 ACPI_LOCK(acpi); 2610 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 2611 sc->acpi_sleep_disabled = TRUE; 2612 ACPI_UNLOCK(acpi); 2613 2614 return (status); 2615} 2616 2617enum acpi_sleep_state { 2618 ACPI_SS_NONE, 2619 ACPI_SS_GPE_SET, 2620 ACPI_SS_DEV_SUSPEND, 2621 ACPI_SS_SLP_PREP, 2622 ACPI_SS_SLEPT, 2623}; 2624 2625/* 2626 * Enter the desired system sleep state. 2627 * 2628 * Currently we support S1-S5 but S4 is only S4BIOS 2629 */ 2630static ACPI_STATUS 2631acpi_EnterSleepState(struct acpi_softc *sc, int state) 2632{ 2633 ACPI_STATUS status; 2634 enum acpi_sleep_state slp_state; 2635 2636 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2637 2638 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2639 return_ACPI_STATUS (AE_BAD_PARAMETER); 2640 if (!acpi_sleep_states[state]) { 2641 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", 2642 state); 2643 return (AE_SUPPORT); 2644 } 2645 2646 /* Re-entry once we're suspending is not allowed. */ 2647 status = acpi_sleep_disable(sc); 2648 if (ACPI_FAILURE(status)) { 2649 device_printf(sc->acpi_dev, 2650 "suspend request ignored (not ready yet)\n"); 2651 return (status); 2652 } 2653 2654 if (state == ACPI_STATE_S5) { 2655 /* 2656 * Shut down cleanly and power off. This will call us back through the 2657 * shutdown handlers. 2658 */ 2659 shutdown_nice(RB_POWEROFF); 2660 return_ACPI_STATUS (AE_OK); 2661 } 2662 2663 EVENTHANDLER_INVOKE(power_suspend); 2664 2665 if (smp_started) { 2666 thread_lock(curthread); 2667 sched_bind(curthread, 0); 2668 thread_unlock(curthread); 2669 } 2670 2671 /* 2672 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2673 * drivers need this. 2674 */ 2675 mtx_lock(&Giant); 2676 2677 slp_state = ACPI_SS_NONE; 2678 2679 sc->acpi_sstate = state; 2680 2681 /* Enable any GPEs as appropriate and requested by the user. */ 2682 acpi_wake_prep_walk(state); 2683 slp_state = ACPI_SS_GPE_SET; 2684 2685 /* 2686 * Inform all devices that we are going to sleep. If at least one 2687 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2688 * 2689 * XXX Note that a better two-pass approach with a 'veto' pass 2690 * followed by a "real thing" pass would be better, but the current 2691 * bus interface does not provide for this. 2692 */ 2693 if (DEVICE_SUSPEND(root_bus) != 0) { 2694 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2695 goto backout; 2696 } 2697 slp_state = ACPI_SS_DEV_SUSPEND; 2698 2699 /* If testing device suspend only, back out of everything here. */ 2700 if (acpi_susp_bounce) 2701 goto backout; 2702 2703 status = AcpiEnterSleepStatePrep(state); 2704 if (ACPI_FAILURE(status)) { 2705 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2706 AcpiFormatException(status)); 2707 goto backout; 2708 } 2709 slp_state = ACPI_SS_SLP_PREP; 2710 2711 if (sc->acpi_sleep_delay > 0) 2712 DELAY(sc->acpi_sleep_delay * 1000000); 2713 2714 if (state != ACPI_STATE_S1) { 2715 acpi_sleep_machdep(sc, state); 2716 2717 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2718 if (state == ACPI_STATE_S4) 2719 AcpiEnable(); 2720 } else { 2721 ACPI_DISABLE_IRQS(); 2722 status = AcpiEnterSleepState(state); 2723 if (ACPI_FAILURE(status)) { 2724 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2725 AcpiFormatException(status)); 2726 goto backout; 2727 } 2728 } 2729 slp_state = ACPI_SS_SLEPT; 2730 2731 /* 2732 * Back out state according to how far along we got in the suspend 2733 * process. This handles both the error and success cases. 2734 */ 2735backout: 2736 if (slp_state >= ACPI_SS_GPE_SET) { 2737 acpi_wake_prep_walk(state); 2738 sc->acpi_sstate = ACPI_STATE_S0; 2739 } 2740 if (slp_state >= ACPI_SS_SLP_PREP) 2741 AcpiLeaveSleepState(state); 2742 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2743 DEVICE_RESUME(root_bus); 2744 if (slp_state >= ACPI_SS_SLEPT) 2745 acpi_enable_fixed_events(sc); 2746 sc->acpi_next_sstate = 0; 2747 2748 mtx_unlock(&Giant); 2749 2750 if (smp_started) { 2751 thread_lock(curthread); 2752 sched_unbind(curthread); 2753 thread_unlock(curthread); 2754 } 2755 2756 EVENTHANDLER_INVOKE(power_resume); 2757 2758 /* Allow another sleep request after a while. */ 2759 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2760 2761 /* Run /etc/rc.resume after we are back. */ 2762 if (devctl_process_running()) 2763 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2764 2765 return_ACPI_STATUS (status); 2766} 2767 2768void 2769acpi_resync_clock(struct acpi_softc *sc) 2770{ 2771 2772 if (!acpi_reset_clock) 2773 return; 2774 2775 /* 2776 * Warm up timecounter again and reset system clock. 2777 */ 2778 (void)timecounter->tc_get_timecount(timecounter); 2779 (void)timecounter->tc_get_timecount(timecounter); 2780 inittodr(time_second + sc->acpi_sleep_delay); 2781} 2782 2783/* Enable or disable the device's wake GPE. */ 2784int 2785acpi_wake_set_enable(device_t dev, int enable) 2786{ 2787 struct acpi_prw_data prw; 2788 ACPI_STATUS status; 2789 int flags; 2790 2791 /* Make sure the device supports waking the system and get the GPE. */ 2792 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2793 return (ENXIO); 2794 2795 flags = acpi_get_flags(dev); 2796 if (enable) { 2797 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2798 ACPI_GPE_ENABLE); 2799 if (ACPI_FAILURE(status)) { 2800 device_printf(dev, "enable wake failed\n"); 2801 return (ENXIO); 2802 } 2803 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2804 } else { 2805 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2806 ACPI_GPE_DISABLE); 2807 if (ACPI_FAILURE(status)) { 2808 device_printf(dev, "disable wake failed\n"); 2809 return (ENXIO); 2810 } 2811 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2812 } 2813 2814 return (0); 2815} 2816 2817static int 2818acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2819{ 2820 struct acpi_prw_data prw; 2821 device_t dev; 2822 2823 /* Check that this is a wake-capable device and get its GPE. */ 2824 if (acpi_parse_prw(handle, &prw) != 0) 2825 return (ENXIO); 2826 dev = acpi_get_device(handle); 2827 2828 /* 2829 * The destination sleep state must be less than (i.e., higher power) 2830 * or equal to the value specified by _PRW. If this GPE cannot be 2831 * enabled for the next sleep state, then disable it. If it can and 2832 * the user requested it be enabled, turn on any required power resources 2833 * and set _PSW. 2834 */ 2835 if (sstate > prw.lowest_wake) { 2836 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2837 if (bootverbose) 2838 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2839 acpi_name(handle), sstate); 2840 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2841 acpi_pwr_wake_enable(handle, 1); 2842 acpi_SetInteger(handle, "_PSW", 1); 2843 if (bootverbose) 2844 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2845 acpi_name(handle), sstate); 2846 } 2847 2848 return (0); 2849} 2850 2851static int 2852acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2853{ 2854 struct acpi_prw_data prw; 2855 device_t dev; 2856 2857 /* 2858 * Check that this is a wake-capable device and get its GPE. Return 2859 * now if the user didn't enable this device for wake. 2860 */ 2861 if (acpi_parse_prw(handle, &prw) != 0) 2862 return (ENXIO); 2863 dev = acpi_get_device(handle); 2864 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2865 return (0); 2866 2867 /* 2868 * If this GPE couldn't be enabled for the previous sleep state, it was 2869 * disabled before going to sleep so re-enable it. If it was enabled, 2870 * clear _PSW and turn off any power resources it used. 2871 */ 2872 if (sstate > prw.lowest_wake) { 2873 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2874 if (bootverbose) 2875 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2876 } else { 2877 acpi_SetInteger(handle, "_PSW", 0); 2878 acpi_pwr_wake_enable(handle, 0); 2879 if (bootverbose) 2880 device_printf(dev, "run_prep cleaned up for %s\n", 2881 acpi_name(handle)); 2882 } 2883 2884 return (0); 2885} 2886 2887static ACPI_STATUS 2888acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2889{ 2890 int sstate; 2891 2892 /* If suspending, run the sleep prep function, otherwise wake. */ 2893 sstate = *(int *)context; 2894 if (AcpiGbl_SystemAwakeAndRunning) 2895 acpi_wake_sleep_prep(handle, sstate); 2896 else 2897 acpi_wake_run_prep(handle, sstate); 2898 return (AE_OK); 2899} 2900 2901/* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2902static int 2903acpi_wake_prep_walk(int sstate) 2904{ 2905 ACPI_HANDLE sb_handle; 2906 2907 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2908 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2909 acpi_wake_prep, NULL, &sstate, NULL); 2910 return (0); 2911} 2912 2913/* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2914static int 2915acpi_wake_sysctl_walk(device_t dev) 2916{ 2917 int error, i, numdevs; 2918 device_t *devlist; 2919 device_t child; 2920 ACPI_STATUS status; 2921 2922 error = device_get_children(dev, &devlist, &numdevs); 2923 if (error != 0 || numdevs == 0) { 2924 if (numdevs == 0) 2925 free(devlist, M_TEMP); 2926 return (error); 2927 } 2928 for (i = 0; i < numdevs; i++) { 2929 child = devlist[i]; 2930 acpi_wake_sysctl_walk(child); 2931 if (!device_is_attached(child)) 2932 continue; 2933 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2934 if (ACPI_SUCCESS(status)) { 2935 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2936 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2937 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2938 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2939 } 2940 } 2941 free(devlist, M_TEMP); 2942 2943 return (0); 2944} 2945 2946/* Enable or disable wake from userland. */ 2947static int 2948acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2949{ 2950 int enable, error; 2951 device_t dev; 2952 2953 dev = (device_t)arg1; 2954 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2955 2956 error = sysctl_handle_int(oidp, &enable, 0, req); 2957 if (error != 0 || req->newptr == NULL) 2958 return (error); 2959 if (enable != 0 && enable != 1) 2960 return (EINVAL); 2961 2962 return (acpi_wake_set_enable(dev, enable)); 2963} 2964 2965/* Parse a device's _PRW into a structure. */ 2966int 2967acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2968{ 2969 ACPI_STATUS status; 2970 ACPI_BUFFER prw_buffer; 2971 ACPI_OBJECT *res, *res2; 2972 int error, i, power_count; 2973 2974 if (h == NULL || prw == NULL) 2975 return (EINVAL); 2976 2977 /* 2978 * The _PRW object (7.2.9) is only required for devices that have the 2979 * ability to wake the system from a sleeping state. 2980 */ 2981 error = EINVAL; 2982 prw_buffer.Pointer = NULL; 2983 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2984 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2985 if (ACPI_FAILURE(status)) 2986 return (ENOENT); 2987 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2988 if (res == NULL) 2989 return (ENOENT); 2990 if (!ACPI_PKG_VALID(res, 2)) 2991 goto out; 2992 2993 /* 2994 * Element 1 of the _PRW object: 2995 * The lowest power system sleeping state that can be entered while still 2996 * providing wake functionality. The sleeping state being entered must 2997 * be less than (i.e., higher power) or equal to this value. 2998 */ 2999 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 3000 goto out; 3001 3002 /* 3003 * Element 0 of the _PRW object: 3004 */ 3005 switch (res->Package.Elements[0].Type) { 3006 case ACPI_TYPE_INTEGER: 3007 /* 3008 * If the data type of this package element is numeric, then this 3009 * _PRW package element is the bit index in the GPEx_EN, in the 3010 * GPE blocks described in the FADT, of the enable bit that is 3011 * enabled for the wake event. 3012 */ 3013 prw->gpe_handle = NULL; 3014 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 3015 error = 0; 3016 break; 3017 case ACPI_TYPE_PACKAGE: 3018 /* 3019 * If the data type of this package element is a package, then this 3020 * _PRW package element is itself a package containing two 3021 * elements. The first is an object reference to the GPE Block 3022 * device that contains the GPE that will be triggered by the wake 3023 * event. The second element is numeric and it contains the bit 3024 * index in the GPEx_EN, in the GPE Block referenced by the 3025 * first element in the package, of the enable bit that is enabled for 3026 * the wake event. 3027 * 3028 * For example, if this field is a package then it is of the form: 3029 * Package() {\_SB.PCI0.ISA.GPE, 2} 3030 */ 3031 res2 = &res->Package.Elements[0]; 3032 if (!ACPI_PKG_VALID(res2, 2)) 3033 goto out; 3034 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 3035 if (prw->gpe_handle == NULL) 3036 goto out; 3037 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 3038 goto out; 3039 error = 0; 3040 break; 3041 default: 3042 goto out; 3043 } 3044 3045 /* Elements 2 to N of the _PRW object are power resources. */ 3046 power_count = res->Package.Count - 2; 3047 if (power_count > ACPI_PRW_MAX_POWERRES) { 3048 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 3049 power_count = 0; 3050 } 3051 prw->power_res_count = power_count; 3052 for (i = 0; i < power_count; i++) 3053 prw->power_res[i] = res->Package.Elements[i]; 3054 3055out: 3056 if (prw_buffer.Pointer != NULL) 3057 AcpiOsFree(prw_buffer.Pointer); 3058 return (error); 3059} 3060 3061/* 3062 * ACPI Event Handlers 3063 */ 3064 3065/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 3066 3067static void 3068acpi_system_eventhandler_sleep(void *arg, int state) 3069{ 3070 struct acpi_softc *sc = (struct acpi_softc *)arg; 3071 int ret; 3072 3073 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3074 3075 /* Check if button action is disabled or unknown. */ 3076 if (state == ACPI_STATE_UNKNOWN) 3077 return; 3078 3079 /* Request that the system prepare to enter the given suspend state. */ 3080 ret = acpi_ReqSleepState(sc, state); 3081 if (ret != 0) 3082 device_printf(sc->acpi_dev, 3083 "request to enter state S%d failed (err %d)\n", state, ret); 3084 3085 return_VOID; 3086} 3087 3088static void 3089acpi_system_eventhandler_wakeup(void *arg, int state) 3090{ 3091 3092 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3093 3094 /* Currently, nothing to do for wakeup. */ 3095 3096 return_VOID; 3097} 3098 3099/* 3100 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 3101 */ 3102static void 3103acpi_invoke_sleep_eventhandler(void *context) 3104{ 3105 3106 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context); 3107} 3108 3109static void 3110acpi_invoke_wake_eventhandler(void *context) 3111{ 3112 3113 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context); 3114} 3115 3116UINT32 3117acpi_event_power_button_sleep(void *context) 3118{ 3119 struct acpi_softc *sc = (struct acpi_softc *)context; 3120 3121 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3122 3123 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3124 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx))) 3125 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3126 return_VALUE (ACPI_INTERRUPT_HANDLED); 3127} 3128 3129UINT32 3130acpi_event_power_button_wake(void *context) 3131{ 3132 struct acpi_softc *sc = (struct acpi_softc *)context; 3133 3134 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3135 3136 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3137 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx))) 3138 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3139 return_VALUE (ACPI_INTERRUPT_HANDLED); 3140} 3141 3142UINT32 3143acpi_event_sleep_button_sleep(void *context) 3144{ 3145 struct acpi_softc *sc = (struct acpi_softc *)context; 3146 3147 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3148 3149 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3150 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx))) 3151 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3152 return_VALUE (ACPI_INTERRUPT_HANDLED); 3153} 3154 3155UINT32 3156acpi_event_sleep_button_wake(void *context) 3157{ 3158 struct acpi_softc *sc = (struct acpi_softc *)context; 3159 3160 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3161 3162 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3163 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx))) 3164 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3165 return_VALUE (ACPI_INTERRUPT_HANDLED); 3166} 3167 3168/* 3169 * XXX This static buffer is suboptimal. There is no locking so only 3170 * use this for single-threaded callers. 3171 */ 3172char * 3173acpi_name(ACPI_HANDLE handle) 3174{ 3175 ACPI_BUFFER buf; 3176 static char data[256]; 3177 3178 buf.Length = sizeof(data); 3179 buf.Pointer = data; 3180 3181 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3182 return (data); 3183 return ("(unknown)"); 3184} 3185 3186/* 3187 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3188 * parts of the namespace. 3189 */ 3190int 3191acpi_avoid(ACPI_HANDLE handle) 3192{ 3193 char *cp, *env, *np; 3194 int len; 3195 3196 np = acpi_name(handle); 3197 if (*np == '\\') 3198 np++; 3199 if ((env = getenv("debug.acpi.avoid")) == NULL) 3200 return (0); 3201 3202 /* Scan the avoid list checking for a match */ 3203 cp = env; 3204 for (;;) { 3205 while (*cp != 0 && isspace(*cp)) 3206 cp++; 3207 if (*cp == 0) 3208 break; 3209 len = 0; 3210 while (cp[len] != 0 && !isspace(cp[len])) 3211 len++; 3212 if (!strncmp(cp, np, len)) { 3213 freeenv(env); 3214 return(1); 3215 } 3216 cp += len; 3217 } 3218 freeenv(env); 3219 3220 return (0); 3221} 3222 3223/* 3224 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3225 */ 3226int 3227acpi_disabled(char *subsys) 3228{ 3229 char *cp, *env; 3230 int len; 3231 3232 if ((env = getenv("debug.acpi.disabled")) == NULL) 3233 return (0); 3234 if (strcmp(env, "all") == 0) { 3235 freeenv(env); 3236 return (1); 3237 } 3238 3239 /* Scan the disable list, checking for a match. */ 3240 cp = env; 3241 for (;;) { 3242 while (*cp != '\0' && isspace(*cp)) 3243 cp++; 3244 if (*cp == '\0') 3245 break; 3246 len = 0; 3247 while (cp[len] != '\0' && !isspace(cp[len])) 3248 len++; 3249 if (strncmp(cp, subsys, len) == 0) { 3250 freeenv(env); 3251 return (1); 3252 } 3253 cp += len; 3254 } 3255 freeenv(env); 3256 3257 return (0); 3258} 3259 3260/* 3261 * Control interface. 3262 * 3263 * We multiplex ioctls for all participating ACPI devices here. Individual 3264 * drivers wanting to be accessible via /dev/acpi should use the 3265 * register/deregister interface to make their handlers visible. 3266 */ 3267struct acpi_ioctl_hook 3268{ 3269 TAILQ_ENTRY(acpi_ioctl_hook) link; 3270 u_long cmd; 3271 acpi_ioctl_fn fn; 3272 void *arg; 3273}; 3274 3275static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3276static int acpi_ioctl_hooks_initted; 3277 3278int 3279acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3280{ 3281 struct acpi_ioctl_hook *hp; 3282 3283 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3284 return (ENOMEM); 3285 hp->cmd = cmd; 3286 hp->fn = fn; 3287 hp->arg = arg; 3288 3289 ACPI_LOCK(acpi); 3290 if (acpi_ioctl_hooks_initted == 0) { 3291 TAILQ_INIT(&acpi_ioctl_hooks); 3292 acpi_ioctl_hooks_initted = 1; 3293 } 3294 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3295 ACPI_UNLOCK(acpi); 3296 3297 return (0); 3298} 3299 3300void 3301acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3302{ 3303 struct acpi_ioctl_hook *hp; 3304 3305 ACPI_LOCK(acpi); 3306 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3307 if (hp->cmd == cmd && hp->fn == fn) 3308 break; 3309 3310 if (hp != NULL) { 3311 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3312 free(hp, M_ACPIDEV); 3313 } 3314 ACPI_UNLOCK(acpi); 3315} 3316 3317static int 3318acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) 3319{ 3320 return (0); 3321} 3322 3323static int 3324acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) 3325{ 3326 return (0); 3327} 3328 3329static int 3330acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 3331{ 3332 struct acpi_softc *sc; 3333 struct acpi_ioctl_hook *hp; 3334 int error, state; 3335 3336 error = 0; 3337 hp = NULL; 3338 sc = dev->si_drv1; 3339 3340 /* 3341 * Scan the list of registered ioctls, looking for handlers. 3342 */ 3343 ACPI_LOCK(acpi); 3344 if (acpi_ioctl_hooks_initted) 3345 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3346 if (hp->cmd == cmd) 3347 break; 3348 } 3349 ACPI_UNLOCK(acpi); 3350 if (hp) 3351 return (hp->fn(cmd, addr, hp->arg)); 3352 3353 /* 3354 * Core ioctls are not permitted for non-writable user. 3355 * Currently, other ioctls just fetch information. 3356 * Not changing system behavior. 3357 */ 3358 if ((flag & FWRITE) == 0) 3359 return (EPERM); 3360 3361 /* Core system ioctls. */ 3362 switch (cmd) { 3363 case ACPIIO_REQSLPSTATE: 3364 state = *(int *)addr; 3365 if (state != ACPI_STATE_S5) 3366 return (acpi_ReqSleepState(sc, state)); 3367 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); 3368 error = EOPNOTSUPP; 3369 break; 3370 case ACPIIO_ACKSLPSTATE: 3371 error = *(int *)addr; 3372 error = acpi_AckSleepState(sc->acpi_clone, error); 3373 break; 3374 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3375 state = *(int *)addr; 3376 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) 3377 return (EINVAL); 3378 if (!acpi_sleep_states[state]) 3379 return (EOPNOTSUPP); 3380 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 3381 error = ENXIO; 3382 break; 3383 default: 3384 error = ENXIO; 3385 break; 3386 } 3387 3388 return (error); 3389} 3390 3391static int 3392acpi_sname2sstate(const char *sname) 3393{ 3394 int sstate; 3395 3396 if (toupper(sname[0]) == 'S') { 3397 sstate = sname[1] - '0'; 3398 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && 3399 sname[2] == '\0') 3400 return (sstate); 3401 } else if (strcasecmp(sname, "NONE") == 0) 3402 return (ACPI_STATE_UNKNOWN); 3403 return (-1); 3404} 3405 3406static const char * 3407acpi_sstate2sname(int sstate) 3408{ 3409 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; 3410 3411 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) 3412 return (snames[sstate]); 3413 else if (sstate == ACPI_STATE_UNKNOWN) 3414 return ("NONE"); 3415 return (NULL); 3416} 3417 3418static int 3419acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3420{ 3421 int error; 3422 struct sbuf sb; 3423 UINT8 state; 3424 3425 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3426 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 3427 if (acpi_sleep_states[state]) 3428 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); 3429 sbuf_trim(&sb); 3430 sbuf_finish(&sb); 3431 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3432 sbuf_delete(&sb); 3433 return (error); 3434} 3435 3436static int 3437acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3438{ 3439 char sleep_state[10]; 3440 int error, new_state, old_state; 3441 3442 old_state = *(int *)oidp->oid_arg1; 3443 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); 3444 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3445 if (error == 0 && req->newptr != NULL) { 3446 new_state = acpi_sname2sstate(sleep_state); 3447 if (new_state < ACPI_STATE_S1) 3448 return (EINVAL); 3449 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) 3450 return (EOPNOTSUPP); 3451 if (new_state != old_state) 3452 *(int *)oidp->oid_arg1 = new_state; 3453 } 3454 return (error); 3455} 3456 3457/* Inform devctl(4) when we receive a Notify. */ 3458void 3459acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3460{ 3461 char notify_buf[16]; 3462 ACPI_BUFFER handle_buf; 3463 ACPI_STATUS status; 3464 3465 if (subsystem == NULL) 3466 return; 3467 3468 handle_buf.Pointer = NULL; 3469 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3470 status = AcpiNsHandleToPathname(h, &handle_buf); 3471 if (ACPI_FAILURE(status)) 3472 return; 3473 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3474 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3475 AcpiOsFree(handle_buf.Pointer); 3476} 3477 3478#ifdef ACPI_DEBUG 3479/* 3480 * Support for parsing debug options from the kernel environment. 3481 * 3482 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3483 * by specifying the names of the bits in the debug.acpi.layer and 3484 * debug.acpi.level environment variables. Bits may be unset by 3485 * prefixing the bit name with !. 3486 */ 3487struct debugtag 3488{ 3489 char *name; 3490 UINT32 value; 3491}; 3492 3493static struct debugtag dbg_layer[] = { 3494 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3495 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3496 {"ACPI_EVENTS", ACPI_EVENTS}, 3497 {"ACPI_TABLES", ACPI_TABLES}, 3498 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3499 {"ACPI_PARSER", ACPI_PARSER}, 3500 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3501 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3502 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3503 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3504 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3505 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3506 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3507 3508 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3509 {"ACPI_BATTERY", ACPI_BATTERY}, 3510 {"ACPI_BUS", ACPI_BUS}, 3511 {"ACPI_BUTTON", ACPI_BUTTON}, 3512 {"ACPI_EC", ACPI_EC}, 3513 {"ACPI_FAN", ACPI_FAN}, 3514 {"ACPI_POWERRES", ACPI_POWERRES}, 3515 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3516 {"ACPI_THERMAL", ACPI_THERMAL}, 3517 {"ACPI_TIMER", ACPI_TIMER}, 3518 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3519 {NULL, 0} 3520}; 3521 3522static struct debugtag dbg_level[] = { 3523 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3524 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3525 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3526 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3527 3528 /* Trace verbosity level 1 [Standard Trace Level] */ 3529 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3530 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3531 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3532 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3533 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3534 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3535 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3536 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3537 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3538 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3539 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3540 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3541 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3542 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3543 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3544 3545 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3546 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3547 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3548 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3549 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3550 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3551 3552 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3553 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3554 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3555 {"ACPI_LV_IO", ACPI_LV_IO}, 3556 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3557 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3558 3559 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3560 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3561 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3562 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3563 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3564 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3565 {NULL, 0} 3566}; 3567 3568static void 3569acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3570{ 3571 char *ep; 3572 int i, l; 3573 int set; 3574 3575 while (*cp) { 3576 if (isspace(*cp)) { 3577 cp++; 3578 continue; 3579 } 3580 ep = cp; 3581 while (*ep && !isspace(*ep)) 3582 ep++; 3583 if (*cp == '!') { 3584 set = 0; 3585 cp++; 3586 if (cp == ep) 3587 continue; 3588 } else { 3589 set = 1; 3590 } 3591 l = ep - cp; 3592 for (i = 0; tag[i].name != NULL; i++) { 3593 if (!strncmp(cp, tag[i].name, l)) { 3594 if (set) 3595 *flag |= tag[i].value; 3596 else 3597 *flag &= ~tag[i].value; 3598 } 3599 } 3600 cp = ep; 3601 } 3602} 3603 3604static void 3605acpi_set_debugging(void *junk) 3606{ 3607 char *layer, *level; 3608 3609 if (cold) { 3610 AcpiDbgLayer = 0; 3611 AcpiDbgLevel = 0; 3612 } 3613 3614 layer = getenv("debug.acpi.layer"); 3615 level = getenv("debug.acpi.level"); 3616 if (layer == NULL && level == NULL) 3617 return; 3618 3619 printf("ACPI set debug"); 3620 if (layer != NULL) { 3621 if (strcmp("NONE", layer) != 0) 3622 printf(" layer '%s'", layer); 3623 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3624 freeenv(layer); 3625 } 3626 if (level != NULL) { 3627 if (strcmp("NONE", level) != 0) 3628 printf(" level '%s'", level); 3629 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3630 freeenv(level); 3631 } 3632 printf("\n"); 3633} 3634 3635SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3636 NULL); 3637 3638static int 3639acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3640{ 3641 int error, *dbg; 3642 struct debugtag *tag; 3643 struct sbuf sb; 3644 3645 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3646 return (ENOMEM); 3647 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3648 tag = &dbg_layer[0]; 3649 dbg = &AcpiDbgLayer; 3650 } else { 3651 tag = &dbg_level[0]; 3652 dbg = &AcpiDbgLevel; 3653 } 3654 3655 /* Get old values if this is a get request. */ 3656 ACPI_SERIAL_BEGIN(acpi); 3657 if (*dbg == 0) { 3658 sbuf_cpy(&sb, "NONE"); 3659 } else if (req->newptr == NULL) { 3660 for (; tag->name != NULL; tag++) { 3661 if ((*dbg & tag->value) == tag->value) 3662 sbuf_printf(&sb, "%s ", tag->name); 3663 } 3664 } 3665 sbuf_trim(&sb); 3666 sbuf_finish(&sb); 3667 3668 /* Copy out the old values to the user. */ 3669 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3670 sbuf_delete(&sb); 3671 3672 /* If the user is setting a string, parse it. */ 3673 if (error == 0 && req->newptr != NULL) { 3674 *dbg = 0; 3675 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3676 acpi_set_debugging(NULL); 3677 } 3678 ACPI_SERIAL_END(acpi); 3679 3680 return (error); 3681} 3682 3683SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3684 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3685SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3686 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3687#endif /* ACPI_DEBUG */ 3688 3689static int 3690acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3691{ 3692 int error; 3693 int old; 3694 3695 old = acpi_debug_objects; 3696 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3697 if (error != 0 || req->newptr == NULL) 3698 return (error); 3699 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3700 return (0); 3701 3702 ACPI_SERIAL_BEGIN(acpi); 3703 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3704 ACPI_SERIAL_END(acpi); 3705 3706 return (0); 3707} 3708 3709static int 3710acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3711{ 3712 char *p; 3713 size_t len; 3714 int i, j; 3715 3716 p = str; 3717 while (isspace(*p) || *p == ',') 3718 p++; 3719 len = strlen(p); 3720 if (len == 0) 3721 return (0); 3722 p = strdup(p, M_TEMP); 3723 for (i = 0; i < len; i++) 3724 if (p[i] == ',') 3725 p[i] = '\0'; 3726 i = j = 0; 3727 while (i < len) 3728 if (isspace(p[i]) || p[i] == '\0') 3729 i++; 3730 else { 3731 i += strlen(p + i) + 1; 3732 j++; 3733 } 3734 if (j == 0) { 3735 free(p, M_TEMP); 3736 return (0); 3737 } 3738 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3739 iface->num = j; 3740 i = j = 0; 3741 while (i < len) 3742 if (isspace(p[i]) || p[i] == '\0') 3743 i++; 3744 else { 3745 iface->data[j] = p + i; 3746 i += strlen(p + i) + 1; 3747 j++; 3748 } 3749 3750 return (j); 3751} 3752 3753static void 3754acpi_free_interfaces(struct acpi_interface *iface) 3755{ 3756 3757 free(iface->data[0], M_TEMP); 3758 free(iface->data, M_TEMP); 3759} 3760 3761static void 3762acpi_reset_interfaces(device_t dev) 3763{ 3764 struct acpi_interface list; 3765 ACPI_STATUS status; 3766 int i; 3767 3768 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3769 for (i = 0; i < list.num; i++) { 3770 status = AcpiInstallInterface(list.data[i]); 3771 if (ACPI_FAILURE(status)) 3772 device_printf(dev, 3773 "failed to install _OSI(\"%s\"): %s\n", 3774 list.data[i], AcpiFormatException(status)); 3775 else if (bootverbose) 3776 device_printf(dev, "installed _OSI(\"%s\")\n", 3777 list.data[i]); 3778 } 3779 acpi_free_interfaces(&list); 3780 } 3781 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3782 for (i = 0; i < list.num; i++) { 3783 status = AcpiRemoveInterface(list.data[i]); 3784 if (ACPI_FAILURE(status)) 3785 device_printf(dev, 3786 "failed to remove _OSI(\"%s\"): %s\n", 3787 list.data[i], AcpiFormatException(status)); 3788 else if (bootverbose) 3789 device_printf(dev, "removed _OSI(\"%s\")\n", 3790 list.data[i]); 3791 } 3792 acpi_free_interfaces(&list); 3793 } 3794} 3795 3796static int 3797acpi_pm_func(u_long cmd, void *arg, ...) 3798{ 3799 int state, acpi_state; 3800 int error; 3801 struct acpi_softc *sc; 3802 va_list ap; 3803 3804 error = 0; 3805 switch (cmd) { 3806 case POWER_CMD_SUSPEND: 3807 sc = (struct acpi_softc *)arg; 3808 if (sc == NULL) { 3809 error = EINVAL; 3810 goto out; 3811 } 3812 3813 va_start(ap, arg); 3814 state = va_arg(ap, int); 3815 va_end(ap); 3816 3817 switch (state) { 3818 case POWER_SLEEP_STATE_STANDBY: 3819 acpi_state = sc->acpi_standby_sx; 3820 break; 3821 case POWER_SLEEP_STATE_SUSPEND: 3822 acpi_state = sc->acpi_suspend_sx; 3823 break; 3824 case POWER_SLEEP_STATE_HIBERNATE: 3825 acpi_state = ACPI_STATE_S4; 3826 break; 3827 default: 3828 error = EINVAL; 3829 goto out; 3830 } 3831 3832 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3833 error = ENXIO; 3834 break; 3835 default: 3836 error = EINVAL; 3837 goto out; 3838 } 3839 3840out: 3841 return (error); 3842} 3843 3844static void 3845acpi_pm_register(void *arg) 3846{ 3847 if (!cold || resource_disabled("acpi", 0)) 3848 return; 3849 3850 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3851} 3852 3853SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3854