acpi.c revision 289032
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: stable/10/sys/dev/acpica/acpi.c 289032 2015-10-08 15:48:44Z cperciva $"); 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 void acpi_resync_clock(struct acpi_softc *sc); 156static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 157static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 158static int acpi_wake_prep_walk(int sstate); 159static int acpi_wake_sysctl_walk(device_t dev); 160static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 161static void acpi_system_eventhandler_sleep(void *arg, int state); 162static void acpi_system_eventhandler_wakeup(void *arg, int state); 163static int acpi_sname2sstate(const char *sname); 164static const char *acpi_sstate2sname(int sstate); 165static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 166static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 167static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 168static int acpi_pm_func(u_long cmd, void *arg, ...); 169static int acpi_child_location_str_method(device_t acdev, device_t child, 170 char *buf, size_t buflen); 171static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 172 char *buf, size_t buflen); 173#if defined(__i386__) || defined(__amd64__) 174static void acpi_enable_pcie(void); 175#endif 176static void acpi_hint_device_unit(device_t acdev, device_t child, 177 const char *name, int *unitp); 178static void acpi_reset_interfaces(device_t dev); 179 180static device_method_t acpi_methods[] = { 181 /* Device interface */ 182 DEVMETHOD(device_probe, acpi_probe), 183 DEVMETHOD(device_attach, acpi_attach), 184 DEVMETHOD(device_shutdown, acpi_shutdown), 185 DEVMETHOD(device_detach, bus_generic_detach), 186 DEVMETHOD(device_suspend, acpi_suspend), 187 DEVMETHOD(device_resume, acpi_resume), 188 189 /* Bus interface */ 190 DEVMETHOD(bus_add_child, acpi_add_child), 191 DEVMETHOD(bus_print_child, acpi_print_child), 192 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 193 DEVMETHOD(bus_driver_added, acpi_driver_added), 194 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 195 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 196 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 197 DEVMETHOD(bus_set_resource, acpi_set_resource), 198 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 199 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 200 DEVMETHOD(bus_adjust_resource, acpi_adjust_resource), 201 DEVMETHOD(bus_release_resource, acpi_release_resource), 202 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 203 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 204 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 205 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 206 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 207 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 208 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 209 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit), 210 DEVMETHOD(bus_get_domain, acpi_get_domain), 211 212 /* ACPI bus */ 213 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 214 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 215 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 216 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 217 218 /* ISA emulation */ 219 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 220 221 DEVMETHOD_END 222}; 223 224static driver_t acpi_driver = { 225 "acpi", 226 acpi_methods, 227 sizeof(struct acpi_softc), 228}; 229 230static devclass_t acpi_devclass; 231DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 232MODULE_VERSION(acpi, 1); 233 234ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 235 236/* Local pools for managing system resources for ACPI child devices. */ 237static struct rman acpi_rman_io, acpi_rman_mem; 238 239#define ACPI_MINIMUM_AWAKETIME 5 240 241/* Holds the description of the acpi0 device. */ 242static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 243 244SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 245static char acpi_ca_version[12]; 246SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 247 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 248 249/* 250 * Allow overriding _OSI methods. 251 */ 252static char acpi_install_interface[256]; 253TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, 254 sizeof(acpi_install_interface)); 255static char acpi_remove_interface[256]; 256TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, 257 sizeof(acpi_remove_interface)); 258 259/* Allow users to dump Debug objects without ACPI debugger. */ 260static int acpi_debug_objects; 261TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 262SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 263 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 264 "Enable Debug objects"); 265 266/* Allow the interpreter to ignore common mistakes in BIOS. */ 267static int acpi_interpreter_slack = 1; 268TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 269SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN, 270 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 271 272/* Ignore register widths set by FADT and use default widths instead. */ 273static int acpi_ignore_reg_width = 1; 274TUNABLE_INT("debug.acpi.default_register_width", &acpi_ignore_reg_width); 275SYSCTL_INT(_debug_acpi, OID_AUTO, default_register_width, CTLFLAG_RDTUN, 276 &acpi_ignore_reg_width, 1, "Ignore register widths set by FADT"); 277 278#ifdef __amd64__ 279/* Reset system clock while resuming. XXX Remove once tested. */ 280static int acpi_reset_clock = 1; 281TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock); 282SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW, 283 &acpi_reset_clock, 1, "Reset system clock while resuming."); 284#endif 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 (BUS_PROBE_NOWILDCARD); 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_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 474 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 475 AcpiGbl_UseDefaultRegisterWidths = acpi_ignore_reg_width ? 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(AcpiEvaluateObject(ACPI_ROOT_OBJECT, 614 __DECONST(char *, AcpiGbl_SleepStateNames[state]), NULL, NULL)) && 615 ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 616 acpi_sleep_states[state] = TRUE; 617 618 /* 619 * Dispatch the default sleep state to devices. The lid switch is set 620 * to UNKNOWN by default to avoid surprising users. 621 */ 622 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ? 623 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN; 624 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN; 625 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ? 626 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN; 627 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ? 628 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN; 629 630 /* Pick the first valid sleep state for the sleep button default. */ 631 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN; 632 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 633 if (acpi_sleep_states[state]) { 634 sc->acpi_sleep_button_sx = state; 635 break; 636 } 637 638 acpi_enable_fixed_events(sc); 639 640 /* 641 * Scan the namespace and attach/initialise children. 642 */ 643 644 /* Register our shutdown handler. */ 645 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 646 SHUTDOWN_PRI_LAST); 647 648 /* 649 * Register our acpi event handlers. 650 * XXX should be configurable eg. via userland policy manager. 651 */ 652 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 653 sc, ACPI_EVENT_PRI_LAST); 654 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 655 sc, ACPI_EVENT_PRI_LAST); 656 657 /* Flag our initial states. */ 658 sc->acpi_enabled = TRUE; 659 sc->acpi_sstate = ACPI_STATE_S0; 660 sc->acpi_sleep_disabled = TRUE; 661 662 /* Create the control device */ 663 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 664 "acpi"); 665 sc->acpi_dev_t->si_drv1 = sc; 666 667 if ((error = acpi_machdep_init(dev))) 668 goto out; 669 670 /* Register ACPI again to pass the correct argument of pm_func. */ 671 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 672 673 if (!acpi_disabled("bus")) 674 acpi_probe_children(dev); 675 676 /* Update all GPEs and enable runtime GPEs. */ 677 status = AcpiUpdateAllGpes(); 678 if (ACPI_FAILURE(status)) 679 device_printf(dev, "Could not update all GPEs: %s\n", 680 AcpiFormatException(status)); 681 682 /* Allow sleep request after a while. */ 683 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 684 685 error = 0; 686 687 out: 688 return_VALUE (error); 689} 690 691static void 692acpi_set_power_children(device_t dev, int state) 693{ 694 device_t child, parent; 695 device_t *devlist; 696 struct pci_devinfo *dinfo; 697 int dstate, i, numdevs; 698 699 if (device_get_children(dev, &devlist, &numdevs) != 0) 700 return; 701 702 /* 703 * Retrieve and set D-state for the sleep state if _SxD is present. 704 * Skip children who aren't attached since they are handled separately. 705 */ 706 parent = device_get_parent(dev); 707 for (i = 0; i < numdevs; i++) { 708 child = devlist[i]; 709 dinfo = device_get_ivars(child); 710 dstate = state; 711 if (device_is_attached(child) && 712 acpi_device_pwr_for_sleep(parent, dev, &dstate) == 0) 713 acpi_set_powerstate(child, dstate); 714 } 715 free(devlist, M_TEMP); 716} 717 718static int 719acpi_suspend(device_t dev) 720{ 721 int error; 722 723 GIANT_REQUIRED; 724 725 error = bus_generic_suspend(dev); 726 if (error == 0) 727 acpi_set_power_children(dev, ACPI_STATE_D3); 728 729 return (error); 730} 731 732static int 733acpi_resume(device_t dev) 734{ 735 736 GIANT_REQUIRED; 737 738 acpi_set_power_children(dev, ACPI_STATE_D0); 739 740 return (bus_generic_resume(dev)); 741} 742 743static int 744acpi_shutdown(device_t dev) 745{ 746 747 GIANT_REQUIRED; 748 749 /* Allow children to shutdown first. */ 750 bus_generic_shutdown(dev); 751 752 /* 753 * Enable any GPEs that are able to power-on the system (i.e., RTC). 754 * Also, disable any that are not valid for this state (most). 755 */ 756 acpi_wake_prep_walk(ACPI_STATE_S5); 757 758 return (0); 759} 760 761/* 762 * Handle a new device being added 763 */ 764static device_t 765acpi_add_child(device_t bus, u_int order, const char *name, int unit) 766{ 767 struct acpi_device *ad; 768 device_t child; 769 770 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 771 return (NULL); 772 773 resource_list_init(&ad->ad_rl); 774 775 child = device_add_child_ordered(bus, order, name, unit); 776 if (child != NULL) 777 device_set_ivars(child, ad); 778 else 779 free(ad, M_ACPIDEV); 780 return (child); 781} 782 783static int 784acpi_print_child(device_t bus, device_t child) 785{ 786 struct acpi_device *adev = device_get_ivars(child); 787 struct resource_list *rl = &adev->ad_rl; 788 int retval = 0; 789 790 retval += bus_print_child_header(bus, child); 791 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 792 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 793 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 794 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 795 if (device_get_flags(child)) 796 retval += printf(" flags %#x", device_get_flags(child)); 797 retval += bus_print_child_domain(bus, child); 798 retval += bus_print_child_footer(bus, child); 799 800 return (retval); 801} 802 803/* 804 * If this device is an ACPI child but no one claimed it, attempt 805 * to power it off. We'll power it back up when a driver is added. 806 * 807 * XXX Disabled for now since many necessary devices (like fdc and 808 * ATA) don't claim the devices we created for them but still expect 809 * them to be powered up. 810 */ 811static void 812acpi_probe_nomatch(device_t bus, device_t child) 813{ 814#ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 815 acpi_set_powerstate(child, ACPI_STATE_D3); 816#endif 817} 818 819/* 820 * If a new driver has a chance to probe a child, first power it up. 821 * 822 * XXX Disabled for now (see acpi_probe_nomatch for details). 823 */ 824static void 825acpi_driver_added(device_t dev, driver_t *driver) 826{ 827 device_t child, *devlist; 828 int i, numdevs; 829 830 DEVICE_IDENTIFY(driver, dev); 831 if (device_get_children(dev, &devlist, &numdevs)) 832 return; 833 for (i = 0; i < numdevs; i++) { 834 child = devlist[i]; 835 if (device_get_state(child) == DS_NOTPRESENT) { 836#ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 837 acpi_set_powerstate(child, ACPI_STATE_D0); 838 if (device_probe_and_attach(child) != 0) 839 acpi_set_powerstate(child, ACPI_STATE_D3); 840#else 841 device_probe_and_attach(child); 842#endif 843 } 844 } 845 free(devlist, M_TEMP); 846} 847 848/* Location hint for devctl(8) */ 849static int 850acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 851 size_t buflen) 852{ 853 struct acpi_device *dinfo = device_get_ivars(child); 854 char buf2[32]; 855 int pxm; 856 857 if (dinfo->ad_handle) { 858 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 859 if (ACPI_SUCCESS(acpi_GetInteger(dinfo->ad_handle, "_PXM", &pxm))) { 860 snprintf(buf2, 32, " _PXM=%d", pxm); 861 strlcat(buf, buf2, buflen); 862 } 863 } else { 864 snprintf(buf, buflen, "unknown"); 865 } 866 return (0); 867} 868 869/* PnP information for devctl(8) */ 870static int 871acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 872 size_t buflen) 873{ 874 struct acpi_device *dinfo = device_get_ivars(child); 875 ACPI_DEVICE_INFO *adinfo; 876 877 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 878 snprintf(buf, buflen, "unknown"); 879 return (0); 880 } 881 882 snprintf(buf, buflen, "_HID=%s _UID=%lu", 883 (adinfo->Valid & ACPI_VALID_HID) ? 884 adinfo->HardwareId.String : "none", 885 (adinfo->Valid & ACPI_VALID_UID) ? 886 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL); 887 AcpiOsFree(adinfo); 888 889 return (0); 890} 891 892/* 893 * Handle per-device ivars 894 */ 895static int 896acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 897{ 898 struct acpi_device *ad; 899 900 if ((ad = device_get_ivars(child)) == NULL) { 901 device_printf(child, "device has no ivars\n"); 902 return (ENOENT); 903 } 904 905 /* ACPI and ISA compatibility ivars */ 906 switch(index) { 907 case ACPI_IVAR_HANDLE: 908 *(ACPI_HANDLE *)result = ad->ad_handle; 909 break; 910 case ACPI_IVAR_PRIVATE: 911 *(void **)result = ad->ad_private; 912 break; 913 case ACPI_IVAR_FLAGS: 914 *(int *)result = ad->ad_flags; 915 break; 916 case ISA_IVAR_VENDORID: 917 case ISA_IVAR_SERIAL: 918 case ISA_IVAR_COMPATID: 919 *(int *)result = -1; 920 break; 921 case ISA_IVAR_LOGICALID: 922 *(int *)result = acpi_isa_get_logicalid(child); 923 break; 924 default: 925 return (ENOENT); 926 } 927 928 return (0); 929} 930 931static int 932acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 933{ 934 struct acpi_device *ad; 935 936 if ((ad = device_get_ivars(child)) == NULL) { 937 device_printf(child, "device has no ivars\n"); 938 return (ENOENT); 939 } 940 941 switch(index) { 942 case ACPI_IVAR_HANDLE: 943 ad->ad_handle = (ACPI_HANDLE)value; 944 break; 945 case ACPI_IVAR_PRIVATE: 946 ad->ad_private = (void *)value; 947 break; 948 case ACPI_IVAR_FLAGS: 949 ad->ad_flags = (int)value; 950 break; 951 default: 952 panic("bad ivar write request (%d)", index); 953 return (ENOENT); 954 } 955 956 return (0); 957} 958 959/* 960 * Handle child resource allocation/removal 961 */ 962static struct resource_list * 963acpi_get_rlist(device_t dev, device_t child) 964{ 965 struct acpi_device *ad; 966 967 ad = device_get_ivars(child); 968 return (&ad->ad_rl); 969} 970 971static int 972acpi_match_resource_hint(device_t dev, int type, long value) 973{ 974 struct acpi_device *ad = device_get_ivars(dev); 975 struct resource_list *rl = &ad->ad_rl; 976 struct resource_list_entry *rle; 977 978 STAILQ_FOREACH(rle, rl, link) { 979 if (rle->type != type) 980 continue; 981 if (rle->start <= value && rle->end >= value) 982 return (1); 983 } 984 return (0); 985} 986 987/* 988 * Wire device unit numbers based on resource matches in hints. 989 */ 990static void 991acpi_hint_device_unit(device_t acdev, device_t child, const char *name, 992 int *unitp) 993{ 994 const char *s; 995 long value; 996 int line, matches, unit; 997 998 /* 999 * Iterate over all the hints for the devices with the specified 1000 * name to see if one's resources are a subset of this device. 1001 */ 1002 line = 0; 1003 for (;;) { 1004 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) 1005 break; 1006 1007 /* Must have an "at" for acpi or isa. */ 1008 resource_string_value(name, unit, "at", &s); 1009 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 || 1010 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0)) 1011 continue; 1012 1013 /* 1014 * Check for matching resources. We must have at least one match. 1015 * Since I/O and memory resources cannot be shared, if we get a 1016 * match on either of those, ignore any mismatches in IRQs or DRQs. 1017 * 1018 * XXX: We may want to revisit this to be more lenient and wire 1019 * as long as it gets one match. 1020 */ 1021 matches = 0; 1022 if (resource_long_value(name, unit, "port", &value) == 0) { 1023 /* 1024 * Floppy drive controllers are notorious for having a 1025 * wide variety of resources not all of which include the 1026 * first port that is specified by the hint (typically 1027 * 0x3f0) (see the comment above fdc_isa_alloc_resources() 1028 * in fdc_isa.c). However, they do all seem to include 1029 * port + 2 (e.g. 0x3f2) so for a floppy device, look for 1030 * 'value + 2' in the port resources instead of the hint 1031 * value. 1032 */ 1033 if (strcmp(name, "fdc") == 0) 1034 value += 2; 1035 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) 1036 matches++; 1037 else 1038 continue; 1039 } 1040 if (resource_long_value(name, unit, "maddr", &value) == 0) { 1041 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value)) 1042 matches++; 1043 else 1044 continue; 1045 } 1046 if (matches > 0) 1047 goto matched; 1048 if (resource_long_value(name, unit, "irq", &value) == 0) { 1049 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) 1050 matches++; 1051 else 1052 continue; 1053 } 1054 if (resource_long_value(name, unit, "drq", &value) == 0) { 1055 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value)) 1056 matches++; 1057 else 1058 continue; 1059 } 1060 1061 matched: 1062 if (matches > 0) { 1063 /* We have a winner! */ 1064 *unitp = unit; 1065 break; 1066 } 1067 } 1068} 1069 1070/* 1071 * Fech the NUMA domain for the given device. 1072 * 1073 * If a device has a _PXM method, map that to a NUMA domain. 1074 * 1075 * If none is found, then it'll call the parent method. 1076 * If there's no domain, return ENOENT. 1077 */ 1078int 1079acpi_get_domain(device_t dev, device_t child, int *domain) 1080{ 1081#if MAXMEMDOM > 1 1082 ACPI_HANDLE h; 1083 int d, pxm; 1084 1085 h = acpi_get_handle(child); 1086 if ((h != NULL) && 1087 ACPI_SUCCESS(acpi_GetInteger(h, "_PXM", &pxm))) { 1088 d = acpi_map_pxm_to_vm_domainid(pxm); 1089 if (d < 0) 1090 return (ENOENT); 1091 *domain = d; 1092 return (0); 1093 } 1094#endif 1095 /* No _PXM node; go up a level */ 1096 return (bus_generic_get_domain(dev, child, domain)); 1097} 1098 1099/* 1100 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1101 * duplicates, we merge any in the sysresource attach routine. 1102 */ 1103static int 1104acpi_sysres_alloc(device_t dev) 1105{ 1106 struct resource *res; 1107 struct resource_list *rl; 1108 struct resource_list_entry *rle; 1109 struct rman *rm; 1110 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1111 device_t *children; 1112 int child_count, i; 1113 1114 /* 1115 * Probe/attach any sysresource devices. This would be unnecessary if we 1116 * had multi-pass probe/attach. 1117 */ 1118 if (device_get_children(dev, &children, &child_count) != 0) 1119 return (ENXIO); 1120 for (i = 0; i < child_count; i++) { 1121 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1122 device_probe_and_attach(children[i]); 1123 } 1124 free(children, M_TEMP); 1125 1126 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1127 STAILQ_FOREACH(rle, rl, link) { 1128 if (rle->res != NULL) { 1129 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1130 continue; 1131 } 1132 1133 /* Only memory and IO resources are valid here. */ 1134 switch (rle->type) { 1135 case SYS_RES_IOPORT: 1136 rm = &acpi_rman_io; 1137 break; 1138 case SYS_RES_MEMORY: 1139 rm = &acpi_rman_mem; 1140 break; 1141 default: 1142 continue; 1143 } 1144 1145 /* Pre-allocate resource and add to our rman pool. */ 1146 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1147 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 1148 if (res != NULL) { 1149 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1150 rle->res = res; 1151 } else if (bootverbose) 1152 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1153 rle->start, rle->count, rle->type); 1154 } 1155 return (0); 1156} 1157 1158static char *pcilink_ids[] = { "PNP0C0F", NULL }; 1159static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1160 1161/* 1162 * Reserve declared resources for devices found during attach once system 1163 * resources have been allocated. 1164 */ 1165static void 1166acpi_reserve_resources(device_t dev) 1167{ 1168 struct resource_list_entry *rle; 1169 struct resource_list *rl; 1170 struct acpi_device *ad; 1171 struct acpi_softc *sc; 1172 device_t *children; 1173 int child_count, i; 1174 1175 sc = device_get_softc(dev); 1176 if (device_get_children(dev, &children, &child_count) != 0) 1177 return; 1178 for (i = 0; i < child_count; i++) { 1179 ad = device_get_ivars(children[i]); 1180 rl = &ad->ad_rl; 1181 1182 /* Don't reserve system resources. */ 1183 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1184 continue; 1185 1186 STAILQ_FOREACH(rle, rl, link) { 1187 /* 1188 * Don't reserve IRQ resources. There are many sticky things 1189 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET 1190 * when using legacy routing). 1191 */ 1192 if (rle->type == SYS_RES_IRQ) 1193 continue; 1194 1195 /* 1196 * Don't reserve the resource if it is already allocated. 1197 * The acpi_ec(4) driver can allocate its resources early 1198 * if ECDT is present. 1199 */ 1200 if (rle->res != NULL) 1201 continue; 1202 1203 /* 1204 * Try to reserve the resource from our parent. If this 1205 * fails because the resource is a system resource, just 1206 * let it be. The resource range is already reserved so 1207 * that other devices will not use it. If the driver 1208 * needs to allocate the resource, then 1209 * acpi_alloc_resource() will sub-alloc from the system 1210 * resource. 1211 */ 1212 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid, 1213 rle->start, rle->end, rle->count, 0); 1214 } 1215 } 1216 free(children, M_TEMP); 1217 sc->acpi_resources_reserved = 1; 1218} 1219 1220static int 1221acpi_set_resource(device_t dev, device_t child, int type, int rid, 1222 u_long start, u_long count) 1223{ 1224 struct acpi_softc *sc = device_get_softc(dev); 1225 struct acpi_device *ad = device_get_ivars(child); 1226 struct resource_list *rl = &ad->ad_rl; 1227 ACPI_DEVICE_INFO *devinfo; 1228 u_long end; 1229 1230 /* Ignore IRQ resources for PCI link devices. */ 1231 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL) 1232 return (0); 1233 1234 /* 1235 * Ignore most resources for PCI root bridges. Some BIOSes 1236 * incorrectly enumerate the memory ranges they decode as plain 1237 * memory resources instead of as ResourceProducer ranges. Other 1238 * BIOSes incorrectly list system resource entries for I/O ranges 1239 * under the PCI bridge. Do allow the one known-correct case on 1240 * x86 of a PCI bridge claiming the I/O ports used for PCI config 1241 * access. 1242 */ 1243 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 1244 if (ACPI_SUCCESS(AcpiGetObjectInfo(ad->ad_handle, &devinfo))) { 1245 if ((devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0) { 1246#if defined(__i386__) || defined(__amd64__) 1247 if (!(type == SYS_RES_IOPORT && start == CONF1_ADDR_PORT)) 1248#endif 1249 { 1250 AcpiOsFree(devinfo); 1251 return (0); 1252 } 1253 } 1254 AcpiOsFree(devinfo); 1255 } 1256 } 1257 1258 /* If the resource is already allocated, fail. */ 1259 if (resource_list_busy(rl, type, rid)) 1260 return (EBUSY); 1261 1262 /* If the resource is already reserved, release it. */ 1263 if (resource_list_reserved(rl, type, rid)) 1264 resource_list_unreserve(rl, dev, child, type, rid); 1265 1266 /* Add the resource. */ 1267 end = (start + count - 1); 1268 resource_list_add(rl, type, rid, start, end, count); 1269 1270 /* Don't reserve resources until the system resources are allocated. */ 1271 if (!sc->acpi_resources_reserved) 1272 return (0); 1273 1274 /* Don't reserve system resources. */ 1275 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL) 1276 return (0); 1277 1278 /* 1279 * Don't reserve IRQ resources. There are many sticky things to 1280 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when 1281 * using legacy routing). 1282 */ 1283 if (type == SYS_RES_IRQ) 1284 return (0); 1285 1286 /* 1287 * Reserve the resource. 1288 * 1289 * XXX: Ignores failure for now. Failure here is probably a 1290 * BIOS/firmware bug? 1291 */ 1292 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0); 1293 return (0); 1294} 1295 1296static struct resource * 1297acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1298 u_long start, u_long end, u_long count, u_int flags) 1299{ 1300 ACPI_RESOURCE ares; 1301 struct acpi_device *ad; 1302 struct resource_list_entry *rle; 1303 struct resource_list *rl; 1304 struct resource *res; 1305 int isdefault = (start == 0UL && end == ~0UL); 1306 1307 /* 1308 * First attempt at allocating the resource. For direct children, 1309 * use resource_list_alloc() to handle reserved resources. For 1310 * other devices, pass the request up to our parent. 1311 */ 1312 if (bus == device_get_parent(child)) { 1313 ad = device_get_ivars(child); 1314 rl = &ad->ad_rl; 1315 1316 /* 1317 * Simulate the behavior of the ISA bus for direct children 1318 * devices. That is, if a non-default range is specified for 1319 * a resource that doesn't exist, use bus_set_resource() to 1320 * add the resource before allocating it. Note that these 1321 * resources will not be reserved. 1322 */ 1323 if (!isdefault && resource_list_find(rl, type, *rid) == NULL) 1324 resource_list_add(rl, type, *rid, start, end, count); 1325 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count, 1326 flags); 1327 if (res != NULL && type == SYS_RES_IRQ) { 1328 /* 1329 * Since bus_config_intr() takes immediate effect, we cannot 1330 * configure the interrupt associated with a device when we 1331 * parse the resources but have to defer it until a driver 1332 * actually allocates the interrupt via bus_alloc_resource(). 1333 * 1334 * XXX: Should we handle the lookup failing? 1335 */ 1336 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1337 acpi_config_intr(child, &ares); 1338 } 1339 1340 /* 1341 * If this is an allocation of the "default" range for a given 1342 * RID, fetch the exact bounds for this resource from the 1343 * resource list entry to try to allocate the range from the 1344 * system resource regions. 1345 */ 1346 if (res == NULL && isdefault) { 1347 rle = resource_list_find(rl, type, *rid); 1348 if (rle != NULL) { 1349 start = rle->start; 1350 end = rle->end; 1351 count = rle->count; 1352 } 1353 } 1354 } else 1355 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1356 start, end, count, flags); 1357 1358 /* 1359 * If the first attempt failed and this is an allocation of a 1360 * specific range, try to satisfy the request via a suballocation 1361 * from our system resource regions. 1362 */ 1363 if (res == NULL && start + count - 1 == end) 1364 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags); 1365 return (res); 1366} 1367 1368/* 1369 * Attempt to allocate a specific resource range from the system 1370 * resource ranges. Note that we only handle memory and I/O port 1371 * system resources. 1372 */ 1373struct resource * 1374acpi_alloc_sysres(device_t child, int type, int *rid, u_long start, u_long end, 1375 u_long count, u_int flags) 1376{ 1377 struct rman *rm; 1378 struct resource *res; 1379 1380 switch (type) { 1381 case SYS_RES_IOPORT: 1382 rm = &acpi_rman_io; 1383 break; 1384 case SYS_RES_MEMORY: 1385 rm = &acpi_rman_mem; 1386 break; 1387 default: 1388 return (NULL); 1389 } 1390 1391 KASSERT(start + count - 1 == end, ("wildcard resource range")); 1392 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1393 child); 1394 if (res == NULL) 1395 return (NULL); 1396 1397 rman_set_rid(res, *rid); 1398 1399 /* If requested, activate the resource using the parent's method. */ 1400 if (flags & RF_ACTIVE) 1401 if (bus_activate_resource(child, type, *rid, res) != 0) { 1402 rman_release_resource(res); 1403 return (NULL); 1404 } 1405 1406 return (res); 1407} 1408 1409static int 1410acpi_is_resource_managed(int type, struct resource *r) 1411{ 1412 1413 /* We only handle memory and IO resources through rman. */ 1414 switch (type) { 1415 case SYS_RES_IOPORT: 1416 return (rman_is_region_manager(r, &acpi_rman_io)); 1417 case SYS_RES_MEMORY: 1418 return (rman_is_region_manager(r, &acpi_rman_mem)); 1419 } 1420 return (0); 1421} 1422 1423static int 1424acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r, 1425 u_long start, u_long end) 1426{ 1427 1428 if (acpi_is_resource_managed(type, r)) 1429 return (rman_adjust_resource(r, start, end)); 1430 return (bus_generic_adjust_resource(bus, child, type, r, start, end)); 1431} 1432 1433static int 1434acpi_release_resource(device_t bus, device_t child, int type, int rid, 1435 struct resource *r) 1436{ 1437 int ret; 1438 1439 /* 1440 * If this resource belongs to one of our internal managers, 1441 * deactivate it and release it to the local pool. 1442 */ 1443 if (acpi_is_resource_managed(type, r)) { 1444 if (rman_get_flags(r) & RF_ACTIVE) { 1445 ret = bus_deactivate_resource(child, type, rid, r); 1446 if (ret != 0) 1447 return (ret); 1448 } 1449 return (rman_release_resource(r)); 1450 } 1451 1452 return (bus_generic_rl_release_resource(bus, child, type, rid, r)); 1453} 1454 1455static void 1456acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1457{ 1458 struct resource_list *rl; 1459 1460 rl = acpi_get_rlist(bus, child); 1461 if (resource_list_busy(rl, type, rid)) { 1462 device_printf(bus, "delete_resource: Resource still owned by child" 1463 " (type=%d, rid=%d)\n", type, rid); 1464 return; 1465 } 1466 resource_list_unreserve(rl, bus, child, type, rid); 1467 resource_list_delete(rl, type, rid); 1468} 1469 1470/* Allocate an IO port or memory resource, given its GAS. */ 1471int 1472acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1473 struct resource **res, u_int flags) 1474{ 1475 int error, res_type; 1476 1477 error = ENOMEM; 1478 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1479 return (EINVAL); 1480 1481 /* We only support memory and IO spaces. */ 1482 switch (gas->SpaceId) { 1483 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1484 res_type = SYS_RES_MEMORY; 1485 break; 1486 case ACPI_ADR_SPACE_SYSTEM_IO: 1487 res_type = SYS_RES_IOPORT; 1488 break; 1489 default: 1490 return (EOPNOTSUPP); 1491 } 1492 1493 /* 1494 * If the register width is less than 8, assume the BIOS author means 1495 * it is a bit field and just allocate a byte. 1496 */ 1497 if (gas->BitWidth && gas->BitWidth < 8) 1498 gas->BitWidth = 8; 1499 1500 /* Validate the address after we're sure we support the space. */ 1501 if (gas->Address == 0 || gas->BitWidth == 0) 1502 return (EINVAL); 1503 1504 bus_set_resource(dev, res_type, *rid, gas->Address, 1505 gas->BitWidth / 8); 1506 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1507 if (*res != NULL) { 1508 *type = res_type; 1509 error = 0; 1510 } else 1511 bus_delete_resource(dev, res_type, *rid); 1512 1513 return (error); 1514} 1515 1516/* Probe _HID and _CID for compatible ISA PNP ids. */ 1517static uint32_t 1518acpi_isa_get_logicalid(device_t dev) 1519{ 1520 ACPI_DEVICE_INFO *devinfo; 1521 ACPI_HANDLE h; 1522 uint32_t pnpid; 1523 1524 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1525 1526 /* Fetch and validate the HID. */ 1527 if ((h = acpi_get_handle(dev)) == NULL || 1528 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1529 return_VALUE (0); 1530 1531 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 && 1532 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ? 1533 PNP_EISAID(devinfo->HardwareId.String) : 0; 1534 AcpiOsFree(devinfo); 1535 1536 return_VALUE (pnpid); 1537} 1538 1539static int 1540acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1541{ 1542 ACPI_DEVICE_INFO *devinfo; 1543 ACPI_PNP_DEVICE_ID *ids; 1544 ACPI_HANDLE h; 1545 uint32_t *pnpid; 1546 int i, valid; 1547 1548 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1549 1550 pnpid = cids; 1551 1552 /* Fetch and validate the CID */ 1553 if ((h = acpi_get_handle(dev)) == NULL || 1554 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1555 return_VALUE (0); 1556 1557 if ((devinfo->Valid & ACPI_VALID_CID) == 0) { 1558 AcpiOsFree(devinfo); 1559 return_VALUE (0); 1560 } 1561 1562 if (devinfo->CompatibleIdList.Count < count) 1563 count = devinfo->CompatibleIdList.Count; 1564 ids = devinfo->CompatibleIdList.Ids; 1565 for (i = 0, valid = 0; i < count; i++) 1566 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE && 1567 strncmp(ids[i].String, "PNP", 3) == 0) { 1568 *pnpid++ = PNP_EISAID(ids[i].String); 1569 valid++; 1570 } 1571 AcpiOsFree(devinfo); 1572 1573 return_VALUE (valid); 1574} 1575 1576static char * 1577acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1578{ 1579 ACPI_HANDLE h; 1580 ACPI_OBJECT_TYPE t; 1581 int i; 1582 1583 h = acpi_get_handle(dev); 1584 if (ids == NULL || h == NULL) 1585 return (NULL); 1586 t = acpi_get_type(dev); 1587 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR) 1588 return (NULL); 1589 1590 /* Try to match one of the array of IDs with a HID or CID. */ 1591 for (i = 0; ids[i] != NULL; i++) { 1592 if (acpi_MatchHid(h, ids[i])) 1593 return (ids[i]); 1594 } 1595 return (NULL); 1596} 1597 1598static ACPI_STATUS 1599acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1600 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1601{ 1602 ACPI_HANDLE h; 1603 1604 if (dev == NULL) 1605 h = ACPI_ROOT_OBJECT; 1606 else if ((h = acpi_get_handle(dev)) == NULL) 1607 return (AE_BAD_PARAMETER); 1608 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1609} 1610 1611int 1612acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1613{ 1614 struct acpi_softc *sc; 1615 ACPI_HANDLE handle; 1616 ACPI_STATUS status; 1617 char sxd[8]; 1618 1619 handle = acpi_get_handle(dev); 1620 1621 /* 1622 * XXX If we find these devices, don't try to power them down. 1623 * The serial and IRDA ports on my T23 hang the system when 1624 * set to D3 and it appears that such legacy devices may 1625 * need special handling in their drivers. 1626 */ 1627 if (dstate == NULL || handle == NULL || 1628 acpi_MatchHid(handle, "PNP0500") || 1629 acpi_MatchHid(handle, "PNP0501") || 1630 acpi_MatchHid(handle, "PNP0502") || 1631 acpi_MatchHid(handle, "PNP0510") || 1632 acpi_MatchHid(handle, "PNP0511")) 1633 return (ENXIO); 1634 1635 /* 1636 * Override next state with the value from _SxD, if present. 1637 * Note illegal _S0D is evaluated because some systems expect this. 1638 */ 1639 sc = device_get_softc(bus); 1640 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1641 status = acpi_GetInteger(handle, sxd, dstate); 1642 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 1643 device_printf(dev, "failed to get %s on %s: %s\n", sxd, 1644 acpi_name(handle), AcpiFormatException(status)); 1645 return (ENXIO); 1646 } 1647 1648 return (0); 1649} 1650 1651/* Callback arg for our implementation of walking the namespace. */ 1652struct acpi_device_scan_ctx { 1653 acpi_scan_cb_t user_fn; 1654 void *arg; 1655 ACPI_HANDLE parent; 1656}; 1657 1658static ACPI_STATUS 1659acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1660{ 1661 struct acpi_device_scan_ctx *ctx; 1662 device_t dev, old_dev; 1663 ACPI_STATUS status; 1664 ACPI_OBJECT_TYPE type; 1665 1666 /* 1667 * Skip this device if we think we'll have trouble with it or it is 1668 * the parent where the scan began. 1669 */ 1670 ctx = (struct acpi_device_scan_ctx *)arg; 1671 if (acpi_avoid(h) || h == ctx->parent) 1672 return (AE_OK); 1673 1674 /* If this is not a valid device type (e.g., a method), skip it. */ 1675 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1676 return (AE_OK); 1677 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1678 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1679 return (AE_OK); 1680 1681 /* 1682 * Call the user function with the current device. If it is unchanged 1683 * afterwards, return. Otherwise, we update the handle to the new dev. 1684 */ 1685 old_dev = acpi_get_device(h); 1686 dev = old_dev; 1687 status = ctx->user_fn(h, &dev, level, ctx->arg); 1688 if (ACPI_FAILURE(status) || old_dev == dev) 1689 return (status); 1690 1691 /* Remove the old child and its connection to the handle. */ 1692 if (old_dev != NULL) { 1693 device_delete_child(device_get_parent(old_dev), old_dev); 1694 AcpiDetachData(h, acpi_fake_objhandler); 1695 } 1696 1697 /* Recreate the handle association if the user created a device. */ 1698 if (dev != NULL) 1699 AcpiAttachData(h, acpi_fake_objhandler, dev); 1700 1701 return (AE_OK); 1702} 1703 1704static ACPI_STATUS 1705acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1706 acpi_scan_cb_t user_fn, void *arg) 1707{ 1708 ACPI_HANDLE h; 1709 struct acpi_device_scan_ctx ctx; 1710 1711 if (acpi_disabled("children")) 1712 return (AE_OK); 1713 1714 if (dev == NULL) 1715 h = ACPI_ROOT_OBJECT; 1716 else if ((h = acpi_get_handle(dev)) == NULL) 1717 return (AE_BAD_PARAMETER); 1718 ctx.user_fn = user_fn; 1719 ctx.arg = arg; 1720 ctx.parent = h; 1721 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1722 acpi_device_scan_cb, NULL, &ctx, NULL)); 1723} 1724 1725/* 1726 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1727 * device power states since it's close enough to ACPI. 1728 */ 1729static int 1730acpi_set_powerstate(device_t child, int state) 1731{ 1732 ACPI_HANDLE h; 1733 ACPI_STATUS status; 1734 1735 h = acpi_get_handle(child); 1736 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) 1737 return (EINVAL); 1738 if (h == NULL) 1739 return (0); 1740 1741 /* Ignore errors if the power methods aren't present. */ 1742 status = acpi_pwr_switch_consumer(h, state); 1743 if (ACPI_SUCCESS(status)) { 1744 if (bootverbose) 1745 device_printf(child, "set ACPI power state D%d on %s\n", 1746 state, acpi_name(h)); 1747 } else if (status != AE_NOT_FOUND) 1748 device_printf(child, 1749 "failed to set ACPI power state D%d on %s: %s\n", state, 1750 acpi_name(h), AcpiFormatException(status)); 1751 1752 return (0); 1753} 1754 1755static int 1756acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1757{ 1758 int result, cid_count, i; 1759 uint32_t lid, cids[8]; 1760 1761 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1762 1763 /* 1764 * ISA-style drivers attached to ACPI may persist and 1765 * probe manually if we return ENOENT. We never want 1766 * that to happen, so don't ever return it. 1767 */ 1768 result = ENXIO; 1769 1770 /* Scan the supplied IDs for a match */ 1771 lid = acpi_isa_get_logicalid(child); 1772 cid_count = acpi_isa_get_compatid(child, cids, 8); 1773 while (ids && ids->ip_id) { 1774 if (lid == ids->ip_id) { 1775 result = 0; 1776 goto out; 1777 } 1778 for (i = 0; i < cid_count; i++) { 1779 if (cids[i] == ids->ip_id) { 1780 result = 0; 1781 goto out; 1782 } 1783 } 1784 ids++; 1785 } 1786 1787 out: 1788 if (result == 0 && ids->ip_desc) 1789 device_set_desc(child, ids->ip_desc); 1790 1791 return_VALUE (result); 1792} 1793 1794#if defined(__i386__) || defined(__amd64__) 1795/* 1796 * Look for a MCFG table. If it is present, use the settings for 1797 * domain (segment) 0 to setup PCI config space access via the memory 1798 * map. 1799 */ 1800static void 1801acpi_enable_pcie(void) 1802{ 1803 ACPI_TABLE_HEADER *hdr; 1804 ACPI_MCFG_ALLOCATION *alloc, *end; 1805 ACPI_STATUS status; 1806 1807 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1808 if (ACPI_FAILURE(status)) 1809 return; 1810 1811 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1812 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1813 while (alloc < end) { 1814 if (alloc->PciSegment == 0) { 1815 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1816 alloc->EndBusNumber); 1817 return; 1818 } 1819 alloc++; 1820 } 1821} 1822#endif 1823 1824/* 1825 * Scan all of the ACPI namespace and attach child devices. 1826 * 1827 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1828 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1829 * However, in violation of the spec, some systems place their PCI link 1830 * devices in \, so we have to walk the whole namespace. We check the 1831 * type of namespace nodes, so this should be ok. 1832 */ 1833static void 1834acpi_probe_children(device_t bus) 1835{ 1836 1837 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1838 1839 /* 1840 * Scan the namespace and insert placeholders for all the devices that 1841 * we find. We also probe/attach any early devices. 1842 * 1843 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1844 * we want to create nodes for all devices, not just those that are 1845 * currently present. (This assumes that we don't want to create/remove 1846 * devices as they appear, which might be smarter.) 1847 */ 1848 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1849 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1850 NULL, bus, NULL); 1851 1852 /* Pre-allocate resources for our rman from any sysresource devices. */ 1853 acpi_sysres_alloc(bus); 1854 1855 /* Reserve resources already allocated to children. */ 1856 acpi_reserve_resources(bus); 1857 1858 /* Create any static children by calling device identify methods. */ 1859 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1860 bus_generic_probe(bus); 1861 1862 /* Probe/attach all children, created statically and from the namespace. */ 1863 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n")); 1864 bus_generic_attach(bus); 1865 1866 /* Attach wake sysctls. */ 1867 acpi_wake_sysctl_walk(bus); 1868 1869 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1870 return_VOID; 1871} 1872 1873/* 1874 * Determine the probe order for a given device. 1875 */ 1876static void 1877acpi_probe_order(ACPI_HANDLE handle, int *order) 1878{ 1879 ACPI_OBJECT_TYPE type; 1880 1881 /* 1882 * 0. CPUs 1883 * 1. I/O port and memory system resource holders 1884 * 2. Clocks and timers (to handle early accesses) 1885 * 3. Embedded controllers (to handle early accesses) 1886 * 4. PCI Link Devices 1887 */ 1888 AcpiGetType(handle, &type); 1889 if (type == ACPI_TYPE_PROCESSOR) 1890 *order = 0; 1891 else if (acpi_MatchHid(handle, "PNP0C01") || 1892 acpi_MatchHid(handle, "PNP0C02")) 1893 *order = 1; 1894 else if (acpi_MatchHid(handle, "PNP0100") || 1895 acpi_MatchHid(handle, "PNP0103") || 1896 acpi_MatchHid(handle, "PNP0B00")) 1897 *order = 2; 1898 else if (acpi_MatchHid(handle, "PNP0C09")) 1899 *order = 3; 1900 else if (acpi_MatchHid(handle, "PNP0C0F")) 1901 *order = 4; 1902} 1903 1904/* 1905 * Evaluate a child device and determine whether we might attach a device to 1906 * it. 1907 */ 1908static ACPI_STATUS 1909acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1910{ 1911 struct acpi_prw_data prw; 1912 ACPI_OBJECT_TYPE type; 1913 ACPI_HANDLE h; 1914 device_t bus, child; 1915 char *handle_str; 1916 int order; 1917 1918 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1919 1920 if (acpi_disabled("children")) 1921 return_ACPI_STATUS (AE_OK); 1922 1923 /* Skip this device if we think we'll have trouble with it. */ 1924 if (acpi_avoid(handle)) 1925 return_ACPI_STATUS (AE_OK); 1926 1927 bus = (device_t)context; 1928 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1929 handle_str = acpi_name(handle); 1930 switch (type) { 1931 case ACPI_TYPE_DEVICE: 1932 /* 1933 * Since we scan from \, be sure to skip system scope objects. 1934 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1935 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1936 * during the intialization and \_TZ_ is to support Notify() on it. 1937 */ 1938 if (strcmp(handle_str, "\\_SB_") == 0 || 1939 strcmp(handle_str, "\\_TZ_") == 0) 1940 break; 1941 if (acpi_parse_prw(handle, &prw) == 0) 1942 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1943 1944 /* 1945 * Ignore devices that do not have a _HID or _CID. They should 1946 * be discovered by other buses (e.g. the PCI bus driver). 1947 */ 1948 if (!acpi_has_hid(handle)) 1949 break; 1950 /* FALLTHROUGH */ 1951 case ACPI_TYPE_PROCESSOR: 1952 case ACPI_TYPE_THERMAL: 1953 case ACPI_TYPE_POWER: 1954 /* 1955 * Create a placeholder device for this node. Sort the 1956 * placeholder so that the probe/attach passes will run 1957 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1958 * are reserved for special objects (i.e., system 1959 * resources). 1960 */ 1961 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1962 order = level * 10 + ACPI_DEV_BASE_ORDER; 1963 acpi_probe_order(handle, &order); 1964 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1965 if (child == NULL) 1966 break; 1967 1968 /* Associate the handle with the device_t and vice versa. */ 1969 acpi_set_handle(child, handle); 1970 AcpiAttachData(handle, acpi_fake_objhandler, child); 1971 1972 /* 1973 * Check that the device is present. If it's not present, 1974 * leave it disabled (so that we have a device_t attached to 1975 * the handle, but we don't probe it). 1976 * 1977 * XXX PCI link devices sometimes report "present" but not 1978 * "functional" (i.e. if disabled). Go ahead and probe them 1979 * anyway since we may enable them later. 1980 */ 1981 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1982 /* Never disable PCI link devices. */ 1983 if (acpi_MatchHid(handle, "PNP0C0F")) 1984 break; 1985 /* 1986 * Docking stations should remain enabled since the system 1987 * may be undocked at boot. 1988 */ 1989 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1990 break; 1991 1992 device_disable(child); 1993 break; 1994 } 1995 1996 /* 1997 * Get the device's resource settings and attach them. 1998 * Note that if the device has _PRS but no _CRS, we need 1999 * to decide when it's appropriate to try to configure the 2000 * device. Ignore the return value here; it's OK for the 2001 * device not to have any resources. 2002 */ 2003 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 2004 break; 2005 } 2006 } 2007 2008 return_ACPI_STATUS (AE_OK); 2009} 2010 2011/* 2012 * AcpiAttachData() requires an object handler but never uses it. This is a 2013 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 2014 */ 2015void 2016acpi_fake_objhandler(ACPI_HANDLE h, void *data) 2017{ 2018} 2019 2020static void 2021acpi_shutdown_final(void *arg, int howto) 2022{ 2023 struct acpi_softc *sc = (struct acpi_softc *)arg; 2024 register_t intr; 2025 ACPI_STATUS status; 2026 2027 /* 2028 * XXX Shutdown code should only run on the BSP (cpuid 0). 2029 * Some chipsets do not power off the system correctly if called from 2030 * an AP. 2031 */ 2032 if ((howto & RB_POWEROFF) != 0) { 2033 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 2034 if (ACPI_FAILURE(status)) { 2035 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2036 AcpiFormatException(status)); 2037 return; 2038 } 2039 device_printf(sc->acpi_dev, "Powering system off\n"); 2040 intr = intr_disable(); 2041 status = AcpiEnterSleepState(ACPI_STATE_S5); 2042 if (ACPI_FAILURE(status)) { 2043 intr_restore(intr); 2044 device_printf(sc->acpi_dev, "power-off failed - %s\n", 2045 AcpiFormatException(status)); 2046 } else { 2047 DELAY(1000000); 2048 intr_restore(intr); 2049 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 2050 } 2051 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 2052 /* Reboot using the reset register. */ 2053 status = AcpiReset(); 2054 if (ACPI_SUCCESS(status)) { 2055 DELAY(1000000); 2056 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 2057 } else if (status != AE_NOT_EXIST) 2058 device_printf(sc->acpi_dev, "reset failed - %s\n", 2059 AcpiFormatException(status)); 2060 } else if (sc->acpi_do_disable && panicstr == NULL) { 2061 /* 2062 * Only disable ACPI if the user requested. On some systems, writing 2063 * the disable value to SMI_CMD hangs the system. 2064 */ 2065 device_printf(sc->acpi_dev, "Shutting down\n"); 2066 AcpiTerminate(); 2067 } 2068} 2069 2070static void 2071acpi_enable_fixed_events(struct acpi_softc *sc) 2072{ 2073 static int first_time = 1; 2074 2075 /* Enable and clear fixed events and install handlers. */ 2076 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 2077 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2078 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 2079 acpi_event_power_button_sleep, sc); 2080 if (first_time) 2081 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 2082 } 2083 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 2084 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 2085 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 2086 acpi_event_sleep_button_sleep, sc); 2087 if (first_time) 2088 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 2089 } 2090 2091 first_time = 0; 2092} 2093 2094/* 2095 * Returns true if the device is actually present and should 2096 * be attached to. This requires the present, enabled, UI-visible 2097 * and diagnostics-passed bits to be set. 2098 */ 2099BOOLEAN 2100acpi_DeviceIsPresent(device_t dev) 2101{ 2102 ACPI_DEVICE_INFO *devinfo; 2103 ACPI_HANDLE h; 2104 BOOLEAN present; 2105 2106 if ((h = acpi_get_handle(dev)) == NULL || 2107 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2108 return (FALSE); 2109 2110 /* If no _STA method, must be present */ 2111 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2112 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2113 2114 AcpiOsFree(devinfo); 2115 return (present); 2116} 2117 2118/* 2119 * Returns true if the battery is actually present and inserted. 2120 */ 2121BOOLEAN 2122acpi_BatteryIsPresent(device_t dev) 2123{ 2124 ACPI_DEVICE_INFO *devinfo; 2125 ACPI_HANDLE h; 2126 BOOLEAN present; 2127 2128 if ((h = acpi_get_handle(dev)) == NULL || 2129 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2130 return (FALSE); 2131 2132 /* If no _STA method, must be present */ 2133 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2134 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2135 2136 AcpiOsFree(devinfo); 2137 return (present); 2138} 2139 2140/* 2141 * Returns true if a device has at least one valid device ID. 2142 */ 2143static BOOLEAN 2144acpi_has_hid(ACPI_HANDLE h) 2145{ 2146 ACPI_DEVICE_INFO *devinfo; 2147 BOOLEAN ret; 2148 2149 if (h == NULL || 2150 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2151 return (FALSE); 2152 2153 ret = FALSE; 2154 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 2155 ret = TRUE; 2156 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2157 if (devinfo->CompatibleIdList.Count > 0) 2158 ret = TRUE; 2159 2160 AcpiOsFree(devinfo); 2161 return (ret); 2162} 2163 2164/* 2165 * Match a HID string against a handle 2166 */ 2167BOOLEAN 2168acpi_MatchHid(ACPI_HANDLE h, const char *hid) 2169{ 2170 ACPI_DEVICE_INFO *devinfo; 2171 BOOLEAN ret; 2172 int i; 2173 2174 if (hid == NULL || h == NULL || 2175 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2176 return (FALSE); 2177 2178 ret = FALSE; 2179 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 2180 strcmp(hid, devinfo->HardwareId.String) == 0) 2181 ret = TRUE; 2182 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2183 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 2184 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 2185 ret = TRUE; 2186 break; 2187 } 2188 } 2189 2190 AcpiOsFree(devinfo); 2191 return (ret); 2192} 2193 2194/* 2195 * Return the handle of a named object within our scope, ie. that of (parent) 2196 * or one if its parents. 2197 */ 2198ACPI_STATUS 2199acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2200{ 2201 ACPI_HANDLE r; 2202 ACPI_STATUS status; 2203 2204 /* Walk back up the tree to the root */ 2205 for (;;) { 2206 status = AcpiGetHandle(parent, path, &r); 2207 if (ACPI_SUCCESS(status)) { 2208 *result = r; 2209 return (AE_OK); 2210 } 2211 /* XXX Return error here? */ 2212 if (status != AE_NOT_FOUND) 2213 return (AE_OK); 2214 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2215 return (AE_NOT_FOUND); 2216 parent = r; 2217 } 2218} 2219 2220/* 2221 * Allocate a buffer with a preset data size. 2222 */ 2223ACPI_BUFFER * 2224acpi_AllocBuffer(int size) 2225{ 2226 ACPI_BUFFER *buf; 2227 2228 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2229 return (NULL); 2230 buf->Length = size; 2231 buf->Pointer = (void *)(buf + 1); 2232 return (buf); 2233} 2234 2235ACPI_STATUS 2236acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2237{ 2238 ACPI_OBJECT arg1; 2239 ACPI_OBJECT_LIST args; 2240 2241 arg1.Type = ACPI_TYPE_INTEGER; 2242 arg1.Integer.Value = number; 2243 args.Count = 1; 2244 args.Pointer = &arg1; 2245 2246 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2247} 2248 2249/* 2250 * Evaluate a path that should return an integer. 2251 */ 2252ACPI_STATUS 2253acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2254{ 2255 ACPI_STATUS status; 2256 ACPI_BUFFER buf; 2257 ACPI_OBJECT param; 2258 2259 if (handle == NULL) 2260 handle = ACPI_ROOT_OBJECT; 2261 2262 /* 2263 * Assume that what we've been pointed at is an Integer object, or 2264 * a method that will return an Integer. 2265 */ 2266 buf.Pointer = ¶m; 2267 buf.Length = sizeof(param); 2268 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2269 if (ACPI_SUCCESS(status)) { 2270 if (param.Type == ACPI_TYPE_INTEGER) 2271 *number = param.Integer.Value; 2272 else 2273 status = AE_TYPE; 2274 } 2275 2276 /* 2277 * In some applications, a method that's expected to return an Integer 2278 * may instead return a Buffer (probably to simplify some internal 2279 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2280 * convert it into an Integer as best we can. 2281 * 2282 * This is a hack. 2283 */ 2284 if (status == AE_BUFFER_OVERFLOW) { 2285 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2286 status = AE_NO_MEMORY; 2287 } else { 2288 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2289 if (ACPI_SUCCESS(status)) 2290 status = acpi_ConvertBufferToInteger(&buf, number); 2291 AcpiOsFree(buf.Pointer); 2292 } 2293 } 2294 return (status); 2295} 2296 2297ACPI_STATUS 2298acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2299{ 2300 ACPI_OBJECT *p; 2301 UINT8 *val; 2302 int i; 2303 2304 p = (ACPI_OBJECT *)bufp->Pointer; 2305 if (p->Type == ACPI_TYPE_INTEGER) { 2306 *number = p->Integer.Value; 2307 return (AE_OK); 2308 } 2309 if (p->Type != ACPI_TYPE_BUFFER) 2310 return (AE_TYPE); 2311 if (p->Buffer.Length > sizeof(int)) 2312 return (AE_BAD_DATA); 2313 2314 *number = 0; 2315 val = p->Buffer.Pointer; 2316 for (i = 0; i < p->Buffer.Length; i++) 2317 *number += val[i] << (i * 8); 2318 return (AE_OK); 2319} 2320 2321/* 2322 * Iterate over the elements of an a package object, calling the supplied 2323 * function for each element. 2324 * 2325 * XXX possible enhancement might be to abort traversal on error. 2326 */ 2327ACPI_STATUS 2328acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2329 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2330{ 2331 ACPI_OBJECT *comp; 2332 int i; 2333 2334 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2335 return (AE_BAD_PARAMETER); 2336 2337 /* Iterate over components */ 2338 i = 0; 2339 comp = pkg->Package.Elements; 2340 for (; i < pkg->Package.Count; i++, comp++) 2341 func(comp, arg); 2342 2343 return (AE_OK); 2344} 2345 2346/* 2347 * Find the (index)th resource object in a set. 2348 */ 2349ACPI_STATUS 2350acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2351{ 2352 ACPI_RESOURCE *rp; 2353 int i; 2354 2355 rp = (ACPI_RESOURCE *)buf->Pointer; 2356 i = index; 2357 while (i-- > 0) { 2358 /* Range check */ 2359 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2360 return (AE_BAD_PARAMETER); 2361 2362 /* Check for terminator */ 2363 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2364 return (AE_NOT_FOUND); 2365 rp = ACPI_NEXT_RESOURCE(rp); 2366 } 2367 if (resp != NULL) 2368 *resp = rp; 2369 2370 return (AE_OK); 2371} 2372 2373/* 2374 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2375 * 2376 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2377 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2378 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2379 * resources. 2380 */ 2381#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2382 2383ACPI_STATUS 2384acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2385{ 2386 ACPI_RESOURCE *rp; 2387 void *newp; 2388 2389 /* Initialise the buffer if necessary. */ 2390 if (buf->Pointer == NULL) { 2391 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2392 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2393 return (AE_NO_MEMORY); 2394 rp = (ACPI_RESOURCE *)buf->Pointer; 2395 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2396 rp->Length = ACPI_RS_SIZE_MIN; 2397 } 2398 if (res == NULL) 2399 return (AE_OK); 2400 2401 /* 2402 * Scan the current buffer looking for the terminator. 2403 * This will either find the terminator or hit the end 2404 * of the buffer and return an error. 2405 */ 2406 rp = (ACPI_RESOURCE *)buf->Pointer; 2407 for (;;) { 2408 /* Range check, don't go outside the buffer */ 2409 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2410 return (AE_BAD_PARAMETER); 2411 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2412 break; 2413 rp = ACPI_NEXT_RESOURCE(rp); 2414 } 2415 2416 /* 2417 * Check the size of the buffer and expand if required. 2418 * 2419 * Required size is: 2420 * size of existing resources before terminator + 2421 * size of new resource and header + 2422 * size of terminator. 2423 * 2424 * Note that this loop should really only run once, unless 2425 * for some reason we are stuffing a *really* huge resource. 2426 */ 2427 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2428 res->Length + ACPI_RS_SIZE_NO_DATA + 2429 ACPI_RS_SIZE_MIN) >= buf->Length) { 2430 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2431 return (AE_NO_MEMORY); 2432 bcopy(buf->Pointer, newp, buf->Length); 2433 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2434 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2435 AcpiOsFree(buf->Pointer); 2436 buf->Pointer = newp; 2437 buf->Length += buf->Length; 2438 } 2439 2440 /* Insert the new resource. */ 2441 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2442 2443 /* And add the terminator. */ 2444 rp = ACPI_NEXT_RESOURCE(rp); 2445 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2446 rp->Length = ACPI_RS_SIZE_MIN; 2447 2448 return (AE_OK); 2449} 2450 2451/* 2452 * Set interrupt model. 2453 */ 2454ACPI_STATUS 2455acpi_SetIntrModel(int model) 2456{ 2457 2458 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2459} 2460 2461/* 2462 * Walk subtables of a table and call a callback routine for each 2463 * subtable. The caller should provide the first subtable and a 2464 * pointer to the end of the table. This can be used to walk tables 2465 * such as MADT and SRAT that use subtable entries. 2466 */ 2467void 2468acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler, 2469 void *arg) 2470{ 2471 ACPI_SUBTABLE_HEADER *entry; 2472 2473 for (entry = first; (void *)entry < end; ) { 2474 /* Avoid an infinite loop if we hit a bogus entry. */ 2475 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER)) 2476 return; 2477 2478 handler(entry, arg); 2479 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length); 2480 } 2481} 2482 2483/* 2484 * DEPRECATED. This interface has serious deficiencies and will be 2485 * removed. 2486 * 2487 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2488 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2489 */ 2490ACPI_STATUS 2491acpi_SetSleepState(struct acpi_softc *sc, int state) 2492{ 2493 static int once; 2494 2495 if (!once) { 2496 device_printf(sc->acpi_dev, 2497"warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2498 once = 1; 2499 } 2500 return (acpi_EnterSleepState(sc, state)); 2501} 2502 2503#if defined(__amd64__) || defined(__i386__) 2504static void 2505acpi_sleep_force_task(void *context) 2506{ 2507 struct acpi_softc *sc = (struct acpi_softc *)context; 2508 2509 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2510 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2511 sc->acpi_next_sstate); 2512} 2513 2514static void 2515acpi_sleep_force(void *arg) 2516{ 2517 struct acpi_softc *sc = (struct acpi_softc *)arg; 2518 2519 device_printf(sc->acpi_dev, 2520 "suspend request timed out, forcing sleep now\n"); 2521 /* 2522 * XXX Suspending from callout cause the freeze in DEVICE_SUSPEND(). 2523 * Suspend from acpi_task thread in stead. 2524 */ 2525 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 2526 acpi_sleep_force_task, sc))) 2527 device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n"); 2528} 2529#endif 2530 2531/* 2532 * Request that the system enter the given suspend state. All /dev/apm 2533 * devices and devd(8) will be notified. Userland then has a chance to 2534 * save state and acknowledge the request. The system sleeps once all 2535 * acks are in. 2536 */ 2537int 2538acpi_ReqSleepState(struct acpi_softc *sc, int state) 2539{ 2540#if defined(__amd64__) || defined(__i386__) 2541 struct apm_clone_data *clone; 2542 ACPI_STATUS status; 2543 2544 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2545 return (EINVAL); 2546 if (!acpi_sleep_states[state]) 2547 return (EOPNOTSUPP); 2548 2549 /* 2550 * If a reboot/shutdown/suspend request is already in progress or 2551 * suspend is blocked due to an upcoming shutdown, just return. 2552 */ 2553 if (rebooting || sc->acpi_next_sstate != 0 || suspend_blocked) { 2554 return (0); 2555 } 2556 2557 /* Wait until sleep is enabled. */ 2558 while (sc->acpi_sleep_disabled) { 2559 AcpiOsSleep(1000); 2560 } 2561 2562 ACPI_LOCK(acpi); 2563 2564 sc->acpi_next_sstate = state; 2565 2566 /* S5 (soft-off) should be entered directly with no waiting. */ 2567 if (state == ACPI_STATE_S5) { 2568 ACPI_UNLOCK(acpi); 2569 status = acpi_EnterSleepState(sc, state); 2570 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2571 } 2572 2573 /* Record the pending state and notify all apm devices. */ 2574 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2575 clone->notify_status = APM_EV_NONE; 2576 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2577 selwakeuppri(&clone->sel_read, PZERO); 2578 KNOTE_LOCKED(&clone->sel_read.si_note, 0); 2579 } 2580 } 2581 2582 /* If devd(8) is not running, immediately enter the sleep state. */ 2583 if (!devctl_process_running()) { 2584 ACPI_UNLOCK(acpi); 2585 status = acpi_EnterSleepState(sc, state); 2586 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2587 } 2588 2589 /* 2590 * Set a timeout to fire if userland doesn't ack the suspend request 2591 * in time. This way we still eventually go to sleep if we were 2592 * overheating or running low on battery, even if userland is hung. 2593 * We cancel this timeout once all userland acks are in or the 2594 * suspend request is aborted. 2595 */ 2596 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2597 ACPI_UNLOCK(acpi); 2598 2599 /* Now notify devd(8) also. */ 2600 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2601 2602 return (0); 2603#else 2604 /* This platform does not support acpi suspend/resume. */ 2605 return (EOPNOTSUPP); 2606#endif 2607} 2608 2609/* 2610 * Acknowledge (or reject) a pending sleep state. The caller has 2611 * prepared for suspend and is now ready for it to proceed. If the 2612 * error argument is non-zero, it indicates suspend should be cancelled 2613 * and gives an errno value describing why. Once all votes are in, 2614 * we suspend the system. 2615 */ 2616int 2617acpi_AckSleepState(struct apm_clone_data *clone, int error) 2618{ 2619#if defined(__amd64__) || defined(__i386__) 2620 struct acpi_softc *sc; 2621 int ret, sleeping; 2622 2623 /* If no pending sleep state, return an error. */ 2624 ACPI_LOCK(acpi); 2625 sc = clone->acpi_sc; 2626 if (sc->acpi_next_sstate == 0) { 2627 ACPI_UNLOCK(acpi); 2628 return (ENXIO); 2629 } 2630 2631 /* Caller wants to abort suspend process. */ 2632 if (error) { 2633 sc->acpi_next_sstate = 0; 2634 callout_stop(&sc->susp_force_to); 2635 device_printf(sc->acpi_dev, 2636 "listener on %s cancelled the pending suspend\n", 2637 devtoname(clone->cdev)); 2638 ACPI_UNLOCK(acpi); 2639 return (0); 2640 } 2641 2642 /* 2643 * Mark this device as acking the suspend request. Then, walk through 2644 * all devices, seeing if they agree yet. We only count devices that 2645 * are writable since read-only devices couldn't ack the request. 2646 */ 2647 sleeping = TRUE; 2648 clone->notify_status = APM_EV_ACKED; 2649 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2650 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2651 clone->notify_status != APM_EV_ACKED) { 2652 sleeping = FALSE; 2653 break; 2654 } 2655 } 2656 2657 /* If all devices have voted "yes", we will suspend now. */ 2658 if (sleeping) 2659 callout_stop(&sc->susp_force_to); 2660 ACPI_UNLOCK(acpi); 2661 ret = 0; 2662 if (sleeping) { 2663 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2664 ret = ENODEV; 2665 } 2666 return (ret); 2667#else 2668 /* This platform does not support acpi suspend/resume. */ 2669 return (EOPNOTSUPP); 2670#endif 2671} 2672 2673static void 2674acpi_sleep_enable(void *arg) 2675{ 2676 struct acpi_softc *sc = (struct acpi_softc *)arg; 2677 2678 /* Reschedule if the system is not fully up and running. */ 2679 if (!AcpiGbl_SystemAwakeAndRunning) { 2680 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2681 return; 2682 } 2683 2684 ACPI_LOCK(acpi); 2685 sc->acpi_sleep_disabled = FALSE; 2686 ACPI_UNLOCK(acpi); 2687} 2688 2689static ACPI_STATUS 2690acpi_sleep_disable(struct acpi_softc *sc) 2691{ 2692 ACPI_STATUS status; 2693 2694 /* Fail if the system is not fully up and running. */ 2695 if (!AcpiGbl_SystemAwakeAndRunning) 2696 return (AE_ERROR); 2697 2698 ACPI_LOCK(acpi); 2699 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 2700 sc->acpi_sleep_disabled = TRUE; 2701 ACPI_UNLOCK(acpi); 2702 2703 return (status); 2704} 2705 2706enum acpi_sleep_state { 2707 ACPI_SS_NONE, 2708 ACPI_SS_GPE_SET, 2709 ACPI_SS_DEV_SUSPEND, 2710 ACPI_SS_SLP_PREP, 2711 ACPI_SS_SLEPT, 2712}; 2713 2714/* 2715 * Enter the desired system sleep state. 2716 * 2717 * Currently we support S1-S5 but S4 is only S4BIOS 2718 */ 2719static ACPI_STATUS 2720acpi_EnterSleepState(struct acpi_softc *sc, int state) 2721{ 2722 register_t intr; 2723 ACPI_STATUS status; 2724 ACPI_EVENT_STATUS power_button_status; 2725 enum acpi_sleep_state slp_state; 2726 int sleep_result; 2727 2728 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2729 2730 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2731 return_ACPI_STATUS (AE_BAD_PARAMETER); 2732 if (!acpi_sleep_states[state]) { 2733 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", 2734 state); 2735 return (AE_SUPPORT); 2736 } 2737 2738 /* Re-entry once we're suspending is not allowed. */ 2739 status = acpi_sleep_disable(sc); 2740 if (ACPI_FAILURE(status)) { 2741 device_printf(sc->acpi_dev, 2742 "suspend request ignored (not ready yet)\n"); 2743 return (status); 2744 } 2745 2746 if (state == ACPI_STATE_S5) { 2747 /* 2748 * Shut down cleanly and power off. This will call us back through the 2749 * shutdown handlers. 2750 */ 2751 shutdown_nice(RB_POWEROFF); 2752 return_ACPI_STATUS (AE_OK); 2753 } 2754 2755 EVENTHANDLER_INVOKE(power_suspend_early); 2756 stop_all_proc(); 2757 EVENTHANDLER_INVOKE(power_suspend); 2758 2759 if (smp_started) { 2760 thread_lock(curthread); 2761 sched_bind(curthread, 0); 2762 thread_unlock(curthread); 2763 } 2764 2765 /* 2766 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2767 * drivers need this. 2768 */ 2769 mtx_lock(&Giant); 2770 2771 slp_state = ACPI_SS_NONE; 2772 2773 sc->acpi_sstate = state; 2774 2775 /* Enable any GPEs as appropriate and requested by the user. */ 2776 acpi_wake_prep_walk(state); 2777 slp_state = ACPI_SS_GPE_SET; 2778 2779 /* 2780 * Inform all devices that we are going to sleep. If at least one 2781 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2782 * 2783 * XXX Note that a better two-pass approach with a 'veto' pass 2784 * followed by a "real thing" pass would be better, but the current 2785 * bus interface does not provide for this. 2786 */ 2787 if (DEVICE_SUSPEND(root_bus) != 0) { 2788 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2789 goto backout; 2790 } 2791 slp_state = ACPI_SS_DEV_SUSPEND; 2792 2793 /* If testing device suspend only, back out of everything here. */ 2794 if (acpi_susp_bounce) 2795 goto backout; 2796 2797 status = AcpiEnterSleepStatePrep(state); 2798 if (ACPI_FAILURE(status)) { 2799 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2800 AcpiFormatException(status)); 2801 goto backout; 2802 } 2803 slp_state = ACPI_SS_SLP_PREP; 2804 2805 if (sc->acpi_sleep_delay > 0) 2806 DELAY(sc->acpi_sleep_delay * 1000000); 2807 2808 intr = intr_disable(); 2809 if (state != ACPI_STATE_S1) { 2810 sleep_result = acpi_sleep_machdep(sc, state); 2811 acpi_wakeup_machdep(sc, state, sleep_result, 0); 2812 2813 /* 2814 * XXX According to ACPI specification SCI_EN bit should be restored 2815 * by ACPI platform (BIOS, firmware) to its pre-sleep state. 2816 * Unfortunately some BIOSes fail to do that and that leads to 2817 * unexpected and serious consequences during wake up like a system 2818 * getting stuck in SMI handlers. 2819 * This hack is picked up from Linux, which claims that it follows 2820 * Windows behavior. 2821 */ 2822 if (sleep_result == 1 && state != ACPI_STATE_S4) 2823 AcpiWriteBitRegister(ACPI_BITREG_SCI_ENABLE, ACPI_ENABLE_EVENT); 2824 2825 AcpiLeaveSleepStatePrep(state); 2826 2827 if (sleep_result == 1 && state == ACPI_STATE_S3) { 2828 /* 2829 * Prevent mis-interpretation of the wakeup by power button 2830 * as a request for power off. 2831 * Ideally we should post an appropriate wakeup event, 2832 * perhaps using acpi_event_power_button_wake or alike. 2833 * 2834 * Clearing of power button status after wakeup is mandated 2835 * by ACPI specification in section "Fixed Power Button". 2836 * 2837 * XXX As of ACPICA 20121114 AcpiGetEventStatus provides 2838 * status as 0/1 corressponding to inactive/active despite 2839 * its type being ACPI_EVENT_STATUS. In other words, 2840 * we should not test for ACPI_EVENT_FLAG_SET for time being. 2841 */ 2842 if (ACPI_SUCCESS(AcpiGetEventStatus(ACPI_EVENT_POWER_BUTTON, 2843 &power_button_status)) && power_button_status != 0) { 2844 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2845 device_printf(sc->acpi_dev, 2846 "cleared fixed power button status\n"); 2847 } 2848 } 2849 2850 intr_restore(intr); 2851 2852 /* call acpi_wakeup_machdep() again with interrupt enabled */ 2853 acpi_wakeup_machdep(sc, state, sleep_result, 1); 2854 2855 if (sleep_result == -1) 2856 goto backout; 2857 2858 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2859 if (state == ACPI_STATE_S4) 2860 AcpiEnable(); 2861 } else { 2862 status = AcpiEnterSleepState(state); 2863 AcpiLeaveSleepStatePrep(state); 2864 intr_restore(intr); 2865 if (ACPI_FAILURE(status)) { 2866 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2867 AcpiFormatException(status)); 2868 goto backout; 2869 } 2870 } 2871 slp_state = ACPI_SS_SLEPT; 2872 2873 /* 2874 * Back out state according to how far along we got in the suspend 2875 * process. This handles both the error and success cases. 2876 */ 2877backout: 2878 if (slp_state >= ACPI_SS_GPE_SET) { 2879 acpi_wake_prep_walk(state); 2880 sc->acpi_sstate = ACPI_STATE_S0; 2881 } 2882 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2883 DEVICE_RESUME(root_bus); 2884 if (slp_state >= ACPI_SS_SLP_PREP) 2885 AcpiLeaveSleepState(state); 2886 if (slp_state >= ACPI_SS_SLEPT) { 2887 acpi_resync_clock(sc); 2888 acpi_enable_fixed_events(sc); 2889 } 2890 sc->acpi_next_sstate = 0; 2891 2892 mtx_unlock(&Giant); 2893 2894 if (smp_started) { 2895 thread_lock(curthread); 2896 sched_unbind(curthread); 2897 thread_unlock(curthread); 2898 } 2899 2900 resume_all_proc(); 2901 2902 EVENTHANDLER_INVOKE(power_resume); 2903 2904 /* Allow another sleep request after a while. */ 2905 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2906 2907 /* Run /etc/rc.resume after we are back. */ 2908 if (devctl_process_running()) 2909 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2910 2911 return_ACPI_STATUS (status); 2912} 2913 2914static void 2915acpi_resync_clock(struct acpi_softc *sc) 2916{ 2917#ifdef __amd64__ 2918 if (!acpi_reset_clock) 2919 return; 2920 2921 /* 2922 * Warm up timecounter again and reset system clock. 2923 */ 2924 (void)timecounter->tc_get_timecount(timecounter); 2925 (void)timecounter->tc_get_timecount(timecounter); 2926 inittodr(time_second + sc->acpi_sleep_delay); 2927#endif 2928} 2929 2930/* Enable or disable the device's wake GPE. */ 2931int 2932acpi_wake_set_enable(device_t dev, int enable) 2933{ 2934 struct acpi_prw_data prw; 2935 ACPI_STATUS status; 2936 int flags; 2937 2938 /* Make sure the device supports waking the system and get the GPE. */ 2939 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2940 return (ENXIO); 2941 2942 flags = acpi_get_flags(dev); 2943 if (enable) { 2944 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2945 ACPI_GPE_ENABLE); 2946 if (ACPI_FAILURE(status)) { 2947 device_printf(dev, "enable wake failed\n"); 2948 return (ENXIO); 2949 } 2950 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2951 } else { 2952 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2953 ACPI_GPE_DISABLE); 2954 if (ACPI_FAILURE(status)) { 2955 device_printf(dev, "disable wake failed\n"); 2956 return (ENXIO); 2957 } 2958 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2959 } 2960 2961 return (0); 2962} 2963 2964static int 2965acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2966{ 2967 struct acpi_prw_data prw; 2968 device_t dev; 2969 2970 /* Check that this is a wake-capable device and get its GPE. */ 2971 if (acpi_parse_prw(handle, &prw) != 0) 2972 return (ENXIO); 2973 dev = acpi_get_device(handle); 2974 2975 /* 2976 * The destination sleep state must be less than (i.e., higher power) 2977 * or equal to the value specified by _PRW. If this GPE cannot be 2978 * enabled for the next sleep state, then disable it. If it can and 2979 * the user requested it be enabled, turn on any required power resources 2980 * and set _PSW. 2981 */ 2982 if (sstate > prw.lowest_wake) { 2983 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2984 if (bootverbose) 2985 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2986 acpi_name(handle), sstate); 2987 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2988 acpi_pwr_wake_enable(handle, 1); 2989 acpi_SetInteger(handle, "_PSW", 1); 2990 if (bootverbose) 2991 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2992 acpi_name(handle), sstate); 2993 } 2994 2995 return (0); 2996} 2997 2998static int 2999acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 3000{ 3001 struct acpi_prw_data prw; 3002 device_t dev; 3003 3004 /* 3005 * Check that this is a wake-capable device and get its GPE. Return 3006 * now if the user didn't enable this device for wake. 3007 */ 3008 if (acpi_parse_prw(handle, &prw) != 0) 3009 return (ENXIO); 3010 dev = acpi_get_device(handle); 3011 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 3012 return (0); 3013 3014 /* 3015 * If this GPE couldn't be enabled for the previous sleep state, it was 3016 * disabled before going to sleep so re-enable it. If it was enabled, 3017 * clear _PSW and turn off any power resources it used. 3018 */ 3019 if (sstate > prw.lowest_wake) { 3020 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 3021 if (bootverbose) 3022 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 3023 } else { 3024 acpi_SetInteger(handle, "_PSW", 0); 3025 acpi_pwr_wake_enable(handle, 0); 3026 if (bootverbose) 3027 device_printf(dev, "run_prep cleaned up for %s\n", 3028 acpi_name(handle)); 3029 } 3030 3031 return (0); 3032} 3033 3034static ACPI_STATUS 3035acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 3036{ 3037 int sstate; 3038 3039 /* If suspending, run the sleep prep function, otherwise wake. */ 3040 sstate = *(int *)context; 3041 if (AcpiGbl_SystemAwakeAndRunning) 3042 acpi_wake_sleep_prep(handle, sstate); 3043 else 3044 acpi_wake_run_prep(handle, sstate); 3045 return (AE_OK); 3046} 3047 3048/* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 3049static int 3050acpi_wake_prep_walk(int sstate) 3051{ 3052 ACPI_HANDLE sb_handle; 3053 3054 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 3055 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 3056 acpi_wake_prep, NULL, &sstate, NULL); 3057 return (0); 3058} 3059 3060/* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 3061static int 3062acpi_wake_sysctl_walk(device_t dev) 3063{ 3064 int error, i, numdevs; 3065 device_t *devlist; 3066 device_t child; 3067 ACPI_STATUS status; 3068 3069 error = device_get_children(dev, &devlist, &numdevs); 3070 if (error != 0 || numdevs == 0) { 3071 if (numdevs == 0) 3072 free(devlist, M_TEMP); 3073 return (error); 3074 } 3075 for (i = 0; i < numdevs; i++) { 3076 child = devlist[i]; 3077 acpi_wake_sysctl_walk(child); 3078 if (!device_is_attached(child)) 3079 continue; 3080 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 3081 if (ACPI_SUCCESS(status)) { 3082 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 3083 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 3084 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 3085 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 3086 } 3087 } 3088 free(devlist, M_TEMP); 3089 3090 return (0); 3091} 3092 3093/* Enable or disable wake from userland. */ 3094static int 3095acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 3096{ 3097 int enable, error; 3098 device_t dev; 3099 3100 dev = (device_t)arg1; 3101 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 3102 3103 error = sysctl_handle_int(oidp, &enable, 0, req); 3104 if (error != 0 || req->newptr == NULL) 3105 return (error); 3106 if (enable != 0 && enable != 1) 3107 return (EINVAL); 3108 3109 return (acpi_wake_set_enable(dev, enable)); 3110} 3111 3112/* Parse a device's _PRW into a structure. */ 3113int 3114acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 3115{ 3116 ACPI_STATUS status; 3117 ACPI_BUFFER prw_buffer; 3118 ACPI_OBJECT *res, *res2; 3119 int error, i, power_count; 3120 3121 if (h == NULL || prw == NULL) 3122 return (EINVAL); 3123 3124 /* 3125 * The _PRW object (7.2.9) is only required for devices that have the 3126 * ability to wake the system from a sleeping state. 3127 */ 3128 error = EINVAL; 3129 prw_buffer.Pointer = NULL; 3130 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 3131 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 3132 if (ACPI_FAILURE(status)) 3133 return (ENOENT); 3134 res = (ACPI_OBJECT *)prw_buffer.Pointer; 3135 if (res == NULL) 3136 return (ENOENT); 3137 if (!ACPI_PKG_VALID(res, 2)) 3138 goto out; 3139 3140 /* 3141 * Element 1 of the _PRW object: 3142 * The lowest power system sleeping state that can be entered while still 3143 * providing wake functionality. The sleeping state being entered must 3144 * be less than (i.e., higher power) or equal to this value. 3145 */ 3146 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 3147 goto out; 3148 3149 /* 3150 * Element 0 of the _PRW object: 3151 */ 3152 switch (res->Package.Elements[0].Type) { 3153 case ACPI_TYPE_INTEGER: 3154 /* 3155 * If the data type of this package element is numeric, then this 3156 * _PRW package element is the bit index in the GPEx_EN, in the 3157 * GPE blocks described in the FADT, of the enable bit that is 3158 * enabled for the wake event. 3159 */ 3160 prw->gpe_handle = NULL; 3161 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 3162 error = 0; 3163 break; 3164 case ACPI_TYPE_PACKAGE: 3165 /* 3166 * If the data type of this package element is a package, then this 3167 * _PRW package element is itself a package containing two 3168 * elements. The first is an object reference to the GPE Block 3169 * device that contains the GPE that will be triggered by the wake 3170 * event. The second element is numeric and it contains the bit 3171 * index in the GPEx_EN, in the GPE Block referenced by the 3172 * first element in the package, of the enable bit that is enabled for 3173 * the wake event. 3174 * 3175 * For example, if this field is a package then it is of the form: 3176 * Package() {\_SB.PCI0.ISA.GPE, 2} 3177 */ 3178 res2 = &res->Package.Elements[0]; 3179 if (!ACPI_PKG_VALID(res2, 2)) 3180 goto out; 3181 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 3182 if (prw->gpe_handle == NULL) 3183 goto out; 3184 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 3185 goto out; 3186 error = 0; 3187 break; 3188 default: 3189 goto out; 3190 } 3191 3192 /* Elements 2 to N of the _PRW object are power resources. */ 3193 power_count = res->Package.Count - 2; 3194 if (power_count > ACPI_PRW_MAX_POWERRES) { 3195 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 3196 power_count = 0; 3197 } 3198 prw->power_res_count = power_count; 3199 for (i = 0; i < power_count; i++) 3200 prw->power_res[i] = res->Package.Elements[i]; 3201 3202out: 3203 if (prw_buffer.Pointer != NULL) 3204 AcpiOsFree(prw_buffer.Pointer); 3205 return (error); 3206} 3207 3208/* 3209 * ACPI Event Handlers 3210 */ 3211 3212/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 3213 3214static void 3215acpi_system_eventhandler_sleep(void *arg, int state) 3216{ 3217 struct acpi_softc *sc = (struct acpi_softc *)arg; 3218 int ret; 3219 3220 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3221 3222 /* Check if button action is disabled or unknown. */ 3223 if (state == ACPI_STATE_UNKNOWN) 3224 return; 3225 3226 /* Request that the system prepare to enter the given suspend state. */ 3227 ret = acpi_ReqSleepState(sc, state); 3228 if (ret != 0) 3229 device_printf(sc->acpi_dev, 3230 "request to enter state S%d failed (err %d)\n", state, ret); 3231 3232 return_VOID; 3233} 3234 3235static void 3236acpi_system_eventhandler_wakeup(void *arg, int state) 3237{ 3238 3239 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3240 3241 /* Currently, nothing to do for wakeup. */ 3242 3243 return_VOID; 3244} 3245 3246/* 3247 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 3248 */ 3249static void 3250acpi_invoke_sleep_eventhandler(void *context) 3251{ 3252 3253 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context); 3254} 3255 3256static void 3257acpi_invoke_wake_eventhandler(void *context) 3258{ 3259 3260 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context); 3261} 3262 3263UINT32 3264acpi_event_power_button_sleep(void *context) 3265{ 3266 struct acpi_softc *sc = (struct acpi_softc *)context; 3267 3268 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3269 3270 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3271 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx))) 3272 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3273 return_VALUE (ACPI_INTERRUPT_HANDLED); 3274} 3275 3276UINT32 3277acpi_event_power_button_wake(void *context) 3278{ 3279 struct acpi_softc *sc = (struct acpi_softc *)context; 3280 3281 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3282 3283 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3284 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx))) 3285 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3286 return_VALUE (ACPI_INTERRUPT_HANDLED); 3287} 3288 3289UINT32 3290acpi_event_sleep_button_sleep(void *context) 3291{ 3292 struct acpi_softc *sc = (struct acpi_softc *)context; 3293 3294 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3295 3296 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3297 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx))) 3298 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3299 return_VALUE (ACPI_INTERRUPT_HANDLED); 3300} 3301 3302UINT32 3303acpi_event_sleep_button_wake(void *context) 3304{ 3305 struct acpi_softc *sc = (struct acpi_softc *)context; 3306 3307 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3308 3309 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3310 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx))) 3311 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3312 return_VALUE (ACPI_INTERRUPT_HANDLED); 3313} 3314 3315/* 3316 * XXX This static buffer is suboptimal. There is no locking so only 3317 * use this for single-threaded callers. 3318 */ 3319char * 3320acpi_name(ACPI_HANDLE handle) 3321{ 3322 ACPI_BUFFER buf; 3323 static char data[256]; 3324 3325 buf.Length = sizeof(data); 3326 buf.Pointer = data; 3327 3328 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3329 return (data); 3330 return ("(unknown)"); 3331} 3332 3333/* 3334 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3335 * parts of the namespace. 3336 */ 3337int 3338acpi_avoid(ACPI_HANDLE handle) 3339{ 3340 char *cp, *env, *np; 3341 int len; 3342 3343 np = acpi_name(handle); 3344 if (*np == '\\') 3345 np++; 3346 if ((env = getenv("debug.acpi.avoid")) == NULL) 3347 return (0); 3348 3349 /* Scan the avoid list checking for a match */ 3350 cp = env; 3351 for (;;) { 3352 while (*cp != 0 && isspace(*cp)) 3353 cp++; 3354 if (*cp == 0) 3355 break; 3356 len = 0; 3357 while (cp[len] != 0 && !isspace(cp[len])) 3358 len++; 3359 if (!strncmp(cp, np, len)) { 3360 freeenv(env); 3361 return(1); 3362 } 3363 cp += len; 3364 } 3365 freeenv(env); 3366 3367 return (0); 3368} 3369 3370/* 3371 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3372 */ 3373int 3374acpi_disabled(char *subsys) 3375{ 3376 char *cp, *env; 3377 int len; 3378 3379 if ((env = getenv("debug.acpi.disabled")) == NULL) 3380 return (0); 3381 if (strcmp(env, "all") == 0) { 3382 freeenv(env); 3383 return (1); 3384 } 3385 3386 /* Scan the disable list, checking for a match. */ 3387 cp = env; 3388 for (;;) { 3389 while (*cp != '\0' && isspace(*cp)) 3390 cp++; 3391 if (*cp == '\0') 3392 break; 3393 len = 0; 3394 while (cp[len] != '\0' && !isspace(cp[len])) 3395 len++; 3396 if (strncmp(cp, subsys, len) == 0) { 3397 freeenv(env); 3398 return (1); 3399 } 3400 cp += len; 3401 } 3402 freeenv(env); 3403 3404 return (0); 3405} 3406 3407/* 3408 * Control interface. 3409 * 3410 * We multiplex ioctls for all participating ACPI devices here. Individual 3411 * drivers wanting to be accessible via /dev/acpi should use the 3412 * register/deregister interface to make their handlers visible. 3413 */ 3414struct acpi_ioctl_hook 3415{ 3416 TAILQ_ENTRY(acpi_ioctl_hook) link; 3417 u_long cmd; 3418 acpi_ioctl_fn fn; 3419 void *arg; 3420}; 3421 3422static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3423static int acpi_ioctl_hooks_initted; 3424 3425int 3426acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3427{ 3428 struct acpi_ioctl_hook *hp; 3429 3430 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3431 return (ENOMEM); 3432 hp->cmd = cmd; 3433 hp->fn = fn; 3434 hp->arg = arg; 3435 3436 ACPI_LOCK(acpi); 3437 if (acpi_ioctl_hooks_initted == 0) { 3438 TAILQ_INIT(&acpi_ioctl_hooks); 3439 acpi_ioctl_hooks_initted = 1; 3440 } 3441 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3442 ACPI_UNLOCK(acpi); 3443 3444 return (0); 3445} 3446 3447void 3448acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3449{ 3450 struct acpi_ioctl_hook *hp; 3451 3452 ACPI_LOCK(acpi); 3453 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3454 if (hp->cmd == cmd && hp->fn == fn) 3455 break; 3456 3457 if (hp != NULL) { 3458 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3459 free(hp, M_ACPIDEV); 3460 } 3461 ACPI_UNLOCK(acpi); 3462} 3463 3464static int 3465acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) 3466{ 3467 return (0); 3468} 3469 3470static int 3471acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) 3472{ 3473 return (0); 3474} 3475 3476static int 3477acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 3478{ 3479 struct acpi_softc *sc; 3480 struct acpi_ioctl_hook *hp; 3481 int error, state; 3482 3483 error = 0; 3484 hp = NULL; 3485 sc = dev->si_drv1; 3486 3487 /* 3488 * Scan the list of registered ioctls, looking for handlers. 3489 */ 3490 ACPI_LOCK(acpi); 3491 if (acpi_ioctl_hooks_initted) 3492 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3493 if (hp->cmd == cmd) 3494 break; 3495 } 3496 ACPI_UNLOCK(acpi); 3497 if (hp) 3498 return (hp->fn(cmd, addr, hp->arg)); 3499 3500 /* 3501 * Core ioctls are not permitted for non-writable user. 3502 * Currently, other ioctls just fetch information. 3503 * Not changing system behavior. 3504 */ 3505 if ((flag & FWRITE) == 0) 3506 return (EPERM); 3507 3508 /* Core system ioctls. */ 3509 switch (cmd) { 3510 case ACPIIO_REQSLPSTATE: 3511 state = *(int *)addr; 3512 if (state != ACPI_STATE_S5) 3513 return (acpi_ReqSleepState(sc, state)); 3514 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); 3515 error = EOPNOTSUPP; 3516 break; 3517 case ACPIIO_ACKSLPSTATE: 3518 error = *(int *)addr; 3519 error = acpi_AckSleepState(sc->acpi_clone, error); 3520 break; 3521 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3522 state = *(int *)addr; 3523 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) 3524 return (EINVAL); 3525 if (!acpi_sleep_states[state]) 3526 return (EOPNOTSUPP); 3527 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 3528 error = ENXIO; 3529 break; 3530 default: 3531 error = ENXIO; 3532 break; 3533 } 3534 3535 return (error); 3536} 3537 3538static int 3539acpi_sname2sstate(const char *sname) 3540{ 3541 int sstate; 3542 3543 if (toupper(sname[0]) == 'S') { 3544 sstate = sname[1] - '0'; 3545 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && 3546 sname[2] == '\0') 3547 return (sstate); 3548 } else if (strcasecmp(sname, "NONE") == 0) 3549 return (ACPI_STATE_UNKNOWN); 3550 return (-1); 3551} 3552 3553static const char * 3554acpi_sstate2sname(int sstate) 3555{ 3556 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; 3557 3558 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) 3559 return (snames[sstate]); 3560 else if (sstate == ACPI_STATE_UNKNOWN) 3561 return ("NONE"); 3562 return (NULL); 3563} 3564 3565static int 3566acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3567{ 3568 int error; 3569 struct sbuf sb; 3570 UINT8 state; 3571 3572 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3573 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 3574 if (acpi_sleep_states[state]) 3575 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); 3576 sbuf_trim(&sb); 3577 sbuf_finish(&sb); 3578 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3579 sbuf_delete(&sb); 3580 return (error); 3581} 3582 3583static int 3584acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3585{ 3586 char sleep_state[10]; 3587 int error, new_state, old_state; 3588 3589 old_state = *(int *)oidp->oid_arg1; 3590 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); 3591 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3592 if (error == 0 && req->newptr != NULL) { 3593 new_state = acpi_sname2sstate(sleep_state); 3594 if (new_state < ACPI_STATE_S1) 3595 return (EINVAL); 3596 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) 3597 return (EOPNOTSUPP); 3598 if (new_state != old_state) 3599 *(int *)oidp->oid_arg1 = new_state; 3600 } 3601 return (error); 3602} 3603 3604/* Inform devctl(4) when we receive a Notify. */ 3605void 3606acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3607{ 3608 char notify_buf[16]; 3609 ACPI_BUFFER handle_buf; 3610 ACPI_STATUS status; 3611 3612 if (subsystem == NULL) 3613 return; 3614 3615 handle_buf.Pointer = NULL; 3616 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3617 status = AcpiNsHandleToPathname(h, &handle_buf); 3618 if (ACPI_FAILURE(status)) 3619 return; 3620 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3621 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3622 AcpiOsFree(handle_buf.Pointer); 3623} 3624 3625#ifdef ACPI_DEBUG 3626/* 3627 * Support for parsing debug options from the kernel environment. 3628 * 3629 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3630 * by specifying the names of the bits in the debug.acpi.layer and 3631 * debug.acpi.level environment variables. Bits may be unset by 3632 * prefixing the bit name with !. 3633 */ 3634struct debugtag 3635{ 3636 char *name; 3637 UINT32 value; 3638}; 3639 3640static struct debugtag dbg_layer[] = { 3641 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3642 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3643 {"ACPI_EVENTS", ACPI_EVENTS}, 3644 {"ACPI_TABLES", ACPI_TABLES}, 3645 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3646 {"ACPI_PARSER", ACPI_PARSER}, 3647 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3648 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3649 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3650 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3651 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3652 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3653 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3654 3655 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3656 {"ACPI_BATTERY", ACPI_BATTERY}, 3657 {"ACPI_BUS", ACPI_BUS}, 3658 {"ACPI_BUTTON", ACPI_BUTTON}, 3659 {"ACPI_EC", ACPI_EC}, 3660 {"ACPI_FAN", ACPI_FAN}, 3661 {"ACPI_POWERRES", ACPI_POWERRES}, 3662 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3663 {"ACPI_THERMAL", ACPI_THERMAL}, 3664 {"ACPI_TIMER", ACPI_TIMER}, 3665 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3666 {NULL, 0} 3667}; 3668 3669static struct debugtag dbg_level[] = { 3670 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3671 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3672 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3673 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3674 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3675 3676 /* Trace verbosity level 1 [Standard Trace Level] */ 3677 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3678 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3679 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3680 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3681 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3682 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3683 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3684 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3685 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3686 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3687 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3688 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3689 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3690 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3691 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3692 3693 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3694 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3695 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3696 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3697 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3698 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3699 3700 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3701 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3702 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3703 {"ACPI_LV_IO", ACPI_LV_IO}, 3704 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3705 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3706 3707 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3708 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3709 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3710 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3711 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3712 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3713 {NULL, 0} 3714}; 3715 3716static void 3717acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3718{ 3719 char *ep; 3720 int i, l; 3721 int set; 3722 3723 while (*cp) { 3724 if (isspace(*cp)) { 3725 cp++; 3726 continue; 3727 } 3728 ep = cp; 3729 while (*ep && !isspace(*ep)) 3730 ep++; 3731 if (*cp == '!') { 3732 set = 0; 3733 cp++; 3734 if (cp == ep) 3735 continue; 3736 } else { 3737 set = 1; 3738 } 3739 l = ep - cp; 3740 for (i = 0; tag[i].name != NULL; i++) { 3741 if (!strncmp(cp, tag[i].name, l)) { 3742 if (set) 3743 *flag |= tag[i].value; 3744 else 3745 *flag &= ~tag[i].value; 3746 } 3747 } 3748 cp = ep; 3749 } 3750} 3751 3752static void 3753acpi_set_debugging(void *junk) 3754{ 3755 char *layer, *level; 3756 3757 if (cold) { 3758 AcpiDbgLayer = 0; 3759 AcpiDbgLevel = 0; 3760 } 3761 3762 layer = getenv("debug.acpi.layer"); 3763 level = getenv("debug.acpi.level"); 3764 if (layer == NULL && level == NULL) 3765 return; 3766 3767 printf("ACPI set debug"); 3768 if (layer != NULL) { 3769 if (strcmp("NONE", layer) != 0) 3770 printf(" layer '%s'", layer); 3771 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3772 freeenv(layer); 3773 } 3774 if (level != NULL) { 3775 if (strcmp("NONE", level) != 0) 3776 printf(" level '%s'", level); 3777 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3778 freeenv(level); 3779 } 3780 printf("\n"); 3781} 3782 3783SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3784 NULL); 3785 3786static int 3787acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3788{ 3789 int error, *dbg; 3790 struct debugtag *tag; 3791 struct sbuf sb; 3792 char temp[128]; 3793 3794 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3795 return (ENOMEM); 3796 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3797 tag = &dbg_layer[0]; 3798 dbg = &AcpiDbgLayer; 3799 } else { 3800 tag = &dbg_level[0]; 3801 dbg = &AcpiDbgLevel; 3802 } 3803 3804 /* Get old values if this is a get request. */ 3805 ACPI_SERIAL_BEGIN(acpi); 3806 if (*dbg == 0) { 3807 sbuf_cpy(&sb, "NONE"); 3808 } else if (req->newptr == NULL) { 3809 for (; tag->name != NULL; tag++) { 3810 if ((*dbg & tag->value) == tag->value) 3811 sbuf_printf(&sb, "%s ", tag->name); 3812 } 3813 } 3814 sbuf_trim(&sb); 3815 sbuf_finish(&sb); 3816 strlcpy(temp, sbuf_data(&sb), sizeof(temp)); 3817 sbuf_delete(&sb); 3818 3819 error = sysctl_handle_string(oidp, temp, sizeof(temp), req); 3820 3821 /* Check for error or no change */ 3822 if (error == 0 && req->newptr != NULL) { 3823 *dbg = 0; 3824 setenv((char *)oidp->oid_arg1, temp); 3825 acpi_set_debugging(NULL); 3826 } 3827 ACPI_SERIAL_END(acpi); 3828 3829 return (error); 3830} 3831 3832SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3833 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3834SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3835 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3836#endif /* ACPI_DEBUG */ 3837 3838static int 3839acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3840{ 3841 int error; 3842 int old; 3843 3844 old = acpi_debug_objects; 3845 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3846 if (error != 0 || req->newptr == NULL) 3847 return (error); 3848 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3849 return (0); 3850 3851 ACPI_SERIAL_BEGIN(acpi); 3852 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3853 ACPI_SERIAL_END(acpi); 3854 3855 return (0); 3856} 3857 3858static int 3859acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3860{ 3861 char *p; 3862 size_t len; 3863 int i, j; 3864 3865 p = str; 3866 while (isspace(*p) || *p == ',') 3867 p++; 3868 len = strlen(p); 3869 if (len == 0) 3870 return (0); 3871 p = strdup(p, M_TEMP); 3872 for (i = 0; i < len; i++) 3873 if (p[i] == ',') 3874 p[i] = '\0'; 3875 i = j = 0; 3876 while (i < len) 3877 if (isspace(p[i]) || p[i] == '\0') 3878 i++; 3879 else { 3880 i += strlen(p + i) + 1; 3881 j++; 3882 } 3883 if (j == 0) { 3884 free(p, M_TEMP); 3885 return (0); 3886 } 3887 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3888 iface->num = j; 3889 i = j = 0; 3890 while (i < len) 3891 if (isspace(p[i]) || p[i] == '\0') 3892 i++; 3893 else { 3894 iface->data[j] = p + i; 3895 i += strlen(p + i) + 1; 3896 j++; 3897 } 3898 3899 return (j); 3900} 3901 3902static void 3903acpi_free_interfaces(struct acpi_interface *iface) 3904{ 3905 3906 free(iface->data[0], M_TEMP); 3907 free(iface->data, M_TEMP); 3908} 3909 3910static void 3911acpi_reset_interfaces(device_t dev) 3912{ 3913 struct acpi_interface list; 3914 ACPI_STATUS status; 3915 int i; 3916 3917 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3918 for (i = 0; i < list.num; i++) { 3919 status = AcpiInstallInterface(list.data[i]); 3920 if (ACPI_FAILURE(status)) 3921 device_printf(dev, 3922 "failed to install _OSI(\"%s\"): %s\n", 3923 list.data[i], AcpiFormatException(status)); 3924 else if (bootverbose) 3925 device_printf(dev, "installed _OSI(\"%s\")\n", 3926 list.data[i]); 3927 } 3928 acpi_free_interfaces(&list); 3929 } 3930 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3931 for (i = 0; i < list.num; i++) { 3932 status = AcpiRemoveInterface(list.data[i]); 3933 if (ACPI_FAILURE(status)) 3934 device_printf(dev, 3935 "failed to remove _OSI(\"%s\"): %s\n", 3936 list.data[i], AcpiFormatException(status)); 3937 else if (bootverbose) 3938 device_printf(dev, "removed _OSI(\"%s\")\n", 3939 list.data[i]); 3940 } 3941 acpi_free_interfaces(&list); 3942 } 3943} 3944 3945static int 3946acpi_pm_func(u_long cmd, void *arg, ...) 3947{ 3948 int state, acpi_state; 3949 int error; 3950 struct acpi_softc *sc; 3951 va_list ap; 3952 3953 error = 0; 3954 switch (cmd) { 3955 case POWER_CMD_SUSPEND: 3956 sc = (struct acpi_softc *)arg; 3957 if (sc == NULL) { 3958 error = EINVAL; 3959 goto out; 3960 } 3961 3962 va_start(ap, arg); 3963 state = va_arg(ap, int); 3964 va_end(ap); 3965 3966 switch (state) { 3967 case POWER_SLEEP_STATE_STANDBY: 3968 acpi_state = sc->acpi_standby_sx; 3969 break; 3970 case POWER_SLEEP_STATE_SUSPEND: 3971 acpi_state = sc->acpi_suspend_sx; 3972 break; 3973 case POWER_SLEEP_STATE_HIBERNATE: 3974 acpi_state = ACPI_STATE_S4; 3975 break; 3976 default: 3977 error = EINVAL; 3978 goto out; 3979 } 3980 3981 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3982 error = ENXIO; 3983 break; 3984 default: 3985 error = EINVAL; 3986 goto out; 3987 } 3988 3989out: 3990 return (error); 3991} 3992 3993static void 3994acpi_pm_register(void *arg) 3995{ 3996 if (!cold || resource_disabled("acpi", 0)) 3997 return; 3998 3999 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 4000} 4001 4002SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 4003