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("$FreeBSD$"); 32 33 #include "opt_acpi.h" 34 35 #include <sys/param.h> 36 #include <sys/eventhandler.h> 37 #include <sys/kernel.h> 38 #include <sys/proc.h> 39 #include <sys/fcntl.h> 40 #include <sys/malloc.h> 41 #include <sys/module.h> 42 #include <sys/bus.h> 43 #include <sys/conf.h> 44 #include <sys/ioccom.h> 45 #include <sys/reboot.h> 46 #include <sys/sysctl.h> 47 #include <sys/ctype.h> 48 #include <sys/linker.h> 49 #include <sys/mount.h> 50 #include <sys/power.h> 51 #include <sys/sbuf.h> 52 #include <sys/sched.h> 53 #include <sys/smp.h> 54 #include <sys/timetc.h> 55 56 #if defined(__i386__) || defined(__amd64__) 57 #include <machine/clock.h> 58 #include <machine/pci_cfgreg.h> 59 #endif 60 #include <machine/resource.h> 61 #include <machine/bus.h> 62 #include <sys/rman.h> 63 #include <isa/isavar.h> 64 #include <isa/pnpvar.h> 65 66 #include <contrib/dev/acpica/include/acpi.h> 67 #include <contrib/dev/acpica/include/accommon.h> 68 #include <contrib/dev/acpica/include/acnamesp.h> 69 70 #include <dev/acpica/acpivar.h> 71 #include <dev/acpica/acpiio.h> 72 73 #include <dev/pci/pcivar.h> 74 75 #include <vm/vm_param.h> 76 77 static MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 78 79 /* Hooks for the ACPI CA debugging infrastructure */ 80 #define _COMPONENT ACPI_BUS 81 ACPI_MODULE_NAME("ACPI") 82 83 static d_open_t acpiopen; 84 static d_close_t acpiclose; 85 static d_ioctl_t acpiioctl; 86 87 static struct cdevsw acpi_cdevsw = { 88 .d_version = D_VERSION, 89 .d_open = acpiopen, 90 .d_close = acpiclose, 91 .d_ioctl = acpiioctl, 92 .d_name = "acpi", 93 }; 94 95 struct acpi_interface { 96 ACPI_STRING *data; 97 int num; 98 }; 99 100 static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 101 static char *pcilink_ids[] = { "PNP0C0F", NULL }; 102 103 /* Global mutex for locking access to the ACPI subsystem. */ 104 struct mtx acpi_mutex; 105 struct callout acpi_sleep_timer; 106 107 /* Bitmap of device quirks. */ 108 int acpi_quirks; 109 110 /* Supported sleep states. */ 111 static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT]; 112 113 static void acpi_lookup(void *arg, const char *name, device_t *dev); 114 static int acpi_modevent(struct module *mod, int event, void *junk); 115 static int acpi_probe(device_t dev); 116 static int acpi_attach(device_t dev); 117 static int acpi_suspend(device_t dev); 118 static int acpi_resume(device_t dev); 119 static int acpi_shutdown(device_t dev); 120 static device_t acpi_add_child(device_t bus, u_int order, const char *name, 121 int unit); 122 static int acpi_print_child(device_t bus, device_t child); 123 static void acpi_probe_nomatch(device_t bus, device_t child); 124 static void acpi_driver_added(device_t dev, driver_t *driver); 125 static void acpi_child_deleted(device_t dev, device_t child); 126 static int acpi_read_ivar(device_t dev, device_t child, int index, 127 uintptr_t *result); 128 static int acpi_write_ivar(device_t dev, device_t child, int index, 129 uintptr_t value); 130 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 131 static void acpi_reserve_resources(device_t dev); 132 static int acpi_sysres_alloc(device_t dev); 133 static int acpi_set_resource(device_t dev, device_t child, int type, 134 int rid, rman_res_t start, rman_res_t count); 135 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 136 int type, int *rid, rman_res_t start, rman_res_t end, 137 rman_res_t count, u_int flags); 138 static int acpi_adjust_resource(device_t bus, device_t child, int type, 139 struct resource *r, rman_res_t start, rman_res_t end); 140 static int acpi_release_resource(device_t bus, device_t child, int type, 141 int rid, struct resource *r); 142 static void acpi_delete_resource(device_t bus, device_t child, int type, 143 int rid); 144 static uint32_t acpi_isa_get_logicalid(device_t dev); 145 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 146 static int acpi_device_id_probe(device_t bus, device_t dev, char **ids, char **match); 147 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 148 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 149 ACPI_BUFFER *ret); 150 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 151 void *context, void **retval); 152 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 153 int max_depth, acpi_scan_cb_t user_fn, void *arg); 154 static int acpi_isa_pnp_probe(device_t bus, device_t child, 155 struct isa_pnp_id *ids); 156 static void acpi_platform_osc(device_t dev); 157 static void acpi_probe_children(device_t bus); 158 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 159 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 160 void *context, void **status); 161 static void acpi_sleep_enable(void *arg); 162 static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc); 163 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 164 static void acpi_shutdown_final(void *arg, int howto); 165 static void acpi_enable_fixed_events(struct acpi_softc *sc); 166 static void acpi_resync_clock(struct acpi_softc *sc); 167 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 168 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 169 static int acpi_wake_prep_walk(int sstate); 170 static int acpi_wake_sysctl_walk(device_t dev); 171 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 172 static void acpi_system_eventhandler_sleep(void *arg, int state); 173 static void acpi_system_eventhandler_wakeup(void *arg, int state); 174 static int acpi_sname2sstate(const char *sname); 175 static const char *acpi_sstate2sname(int sstate); 176 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 177 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 178 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 179 static int acpi_pm_func(u_long cmd, void *arg, ...); 180 static int acpi_child_location_str_method(device_t acdev, device_t child, 181 char *buf, size_t buflen); 182 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 183 char *buf, size_t buflen); 184 static void acpi_enable_pcie(void); 185 static void acpi_hint_device_unit(device_t acdev, device_t child, 186 const char *name, int *unitp); 187 static void acpi_reset_interfaces(device_t dev); 188 189 static device_method_t acpi_methods[] = { 190 /* Device interface */ 191 DEVMETHOD(device_probe, acpi_probe), 192 DEVMETHOD(device_attach, acpi_attach), 193 DEVMETHOD(device_shutdown, acpi_shutdown), 194 DEVMETHOD(device_detach, bus_generic_detach), 195 DEVMETHOD(device_suspend, acpi_suspend), 196 DEVMETHOD(device_resume, acpi_resume), 197 198 /* Bus interface */ 199 DEVMETHOD(bus_add_child, acpi_add_child), 200 DEVMETHOD(bus_print_child, acpi_print_child), 201 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 202 DEVMETHOD(bus_driver_added, acpi_driver_added), 203 DEVMETHOD(bus_child_deleted, acpi_child_deleted), 204 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 205 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 206 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 207 DEVMETHOD(bus_set_resource, acpi_set_resource), 208 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 209 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 210 DEVMETHOD(bus_adjust_resource, acpi_adjust_resource), 211 DEVMETHOD(bus_release_resource, acpi_release_resource), 212 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 213 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 214 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 215 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 216 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 217 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 218 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 219 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit), 220 DEVMETHOD(bus_get_cpus, acpi_get_cpus), 221 DEVMETHOD(bus_get_domain, acpi_get_domain), 222 223 /* ACPI bus */ 224 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 225 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 226 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 227 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 228 229 /* ISA emulation */ 230 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 231 232 DEVMETHOD_END 233 }; 234 235 static driver_t acpi_driver = { 236 "acpi", 237 acpi_methods, 238 sizeof(struct acpi_softc), 239 }; 240 241 static devclass_t acpi_devclass; 242 EARLY_DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0, 243 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 244 MODULE_VERSION(acpi, 1); 245 246 ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 247 248 /* Local pools for managing system resources for ACPI child devices. */ 249 static struct rman acpi_rman_io, acpi_rman_mem; 250 251 #define ACPI_MINIMUM_AWAKETIME 5 252 253 /* Holds the description of the acpi0 device. */ 254 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 255 256 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 257 "ACPI debugging"); 258 static char acpi_ca_version[12]; 259 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 260 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 261 262 /* 263 * Allow overriding _OSI methods. 264 */ 265 static char acpi_install_interface[256]; 266 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, 267 sizeof(acpi_install_interface)); 268 static char acpi_remove_interface[256]; 269 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, 270 sizeof(acpi_remove_interface)); 271 272 /* Allow users to dump Debug objects without ACPI debugger. */ 273 static int acpi_debug_objects; 274 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 275 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 276 CTLFLAG_RW | CTLTYPE_INT | CTLFLAG_NEEDGIANT, NULL, 0, 277 acpi_debug_objects_sysctl, "I", 278 "Enable Debug objects"); 279 280 /* Allow the interpreter to ignore common mistakes in BIOS. */ 281 static int acpi_interpreter_slack = 1; 282 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 283 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN, 284 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 285 286 /* Ignore register widths set by FADT and use default widths instead. */ 287 static int acpi_ignore_reg_width = 1; 288 TUNABLE_INT("debug.acpi.default_register_width", &acpi_ignore_reg_width); 289 SYSCTL_INT(_debug_acpi, OID_AUTO, default_register_width, CTLFLAG_RDTUN, 290 &acpi_ignore_reg_width, 1, "Ignore register widths set by FADT"); 291 292 /* Allow users to override quirks. */ 293 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 294 295 int acpi_susp_bounce; 296 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 297 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 298 299 /* 300 * ACPI can only be loaded as a module by the loader; activating it after 301 * system bootstrap time is not useful, and can be fatal to the system. 302 * It also cannot be unloaded, since the entire system bus hierarchy hangs 303 * off it. 304 */ 305 static int 306 acpi_modevent(struct module *mod, int event, void *junk) 307 { 308 switch (event) { 309 case MOD_LOAD: 310 if (!cold) { 311 printf("The ACPI driver cannot be loaded after boot.\n"); 312 return (EPERM); 313 } 314 break; 315 case MOD_UNLOAD: 316 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 317 return (EBUSY); 318 break; 319 default: 320 break; 321 } 322 return (0); 323 } 324 325 /* 326 * Perform early initialization. 327 */ 328 ACPI_STATUS 329 acpi_Startup(void) 330 { 331 static int started = 0; 332 ACPI_STATUS status; 333 int val; 334 335 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 336 337 /* Only run the startup code once. The MADT driver also calls this. */ 338 if (started) 339 return_VALUE (AE_OK); 340 started = 1; 341 342 /* 343 * Initialize the ACPICA subsystem. 344 */ 345 if (ACPI_FAILURE(status = AcpiInitializeSubsystem())) { 346 printf("ACPI: Could not initialize Subsystem: %s\n", 347 AcpiFormatException(status)); 348 return_VALUE (status); 349 } 350 351 /* 352 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 353 * if more tables exist. 354 */ 355 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 356 printf("ACPI: Table initialisation failed: %s\n", 357 AcpiFormatException(status)); 358 return_VALUE (status); 359 } 360 361 /* Set up any quirks we have for this system. */ 362 if (acpi_quirks == ACPI_Q_OK) 363 acpi_table_quirks(&acpi_quirks); 364 365 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 366 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 367 acpi_quirks &= ~ACPI_Q_BROKEN; 368 if (acpi_quirks & ACPI_Q_BROKEN) { 369 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 370 status = AE_SUPPORT; 371 } 372 373 return_VALUE (status); 374 } 375 376 /* 377 * Detect ACPI and perform early initialisation. 378 */ 379 int 380 acpi_identify(void) 381 { 382 ACPI_TABLE_RSDP *rsdp; 383 ACPI_TABLE_HEADER *rsdt; 384 ACPI_PHYSICAL_ADDRESS paddr; 385 struct sbuf sb; 386 387 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 388 389 if (!cold) 390 return (ENXIO); 391 392 /* Check that we haven't been disabled with a hint. */ 393 if (resource_disabled("acpi", 0)) 394 return (ENXIO); 395 396 /* Check for other PM systems. */ 397 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 398 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 399 printf("ACPI identify failed, other PM system enabled.\n"); 400 return (ENXIO); 401 } 402 403 /* Initialize root tables. */ 404 if (ACPI_FAILURE(acpi_Startup())) { 405 printf("ACPI: Try disabling either ACPI or apic support.\n"); 406 return (ENXIO); 407 } 408 409 if ((paddr = AcpiOsGetRootPointer()) == 0 || 410 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 411 return (ENXIO); 412 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 413 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 414 else 415 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 416 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 417 418 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 419 return (ENXIO); 420 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); 421 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 422 sbuf_trim(&sb); 423 sbuf_putc(&sb, ' '); 424 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 425 sbuf_trim(&sb); 426 sbuf_finish(&sb); 427 sbuf_delete(&sb); 428 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 429 430 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 431 432 return (0); 433 } 434 435 /* 436 * Fetch some descriptive data from ACPI to put in our attach message. 437 */ 438 static int 439 acpi_probe(device_t dev) 440 { 441 442 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 443 444 device_set_desc(dev, acpi_desc); 445 446 return_VALUE (BUS_PROBE_NOWILDCARD); 447 } 448 449 static int 450 acpi_attach(device_t dev) 451 { 452 struct acpi_softc *sc; 453 ACPI_STATUS status; 454 int error, state; 455 UINT32 flags; 456 UINT8 TypeA, TypeB; 457 char *env; 458 459 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 460 461 sc = device_get_softc(dev); 462 sc->acpi_dev = dev; 463 callout_init(&sc->susp_force_to, 1); 464 465 error = ENXIO; 466 467 /* Initialize resource manager. */ 468 acpi_rman_io.rm_type = RMAN_ARRAY; 469 acpi_rman_io.rm_start = 0; 470 acpi_rman_io.rm_end = 0xffff; 471 acpi_rman_io.rm_descr = "ACPI I/O ports"; 472 if (rman_init(&acpi_rman_io) != 0) 473 panic("acpi rman_init IO ports failed"); 474 acpi_rman_mem.rm_type = RMAN_ARRAY; 475 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 476 if (rman_init(&acpi_rman_mem) != 0) 477 panic("acpi rman_init memory failed"); 478 479 /* Initialise the ACPI mutex */ 480 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 481 482 /* 483 * Set the globals from our tunables. This is needed because ACPI-CA 484 * uses UINT8 for some values and we have no tunable_byte. 485 */ 486 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 487 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 488 AcpiGbl_UseDefaultRegisterWidths = acpi_ignore_reg_width ? TRUE : FALSE; 489 490 #ifndef ACPI_DEBUG 491 /* 492 * Disable all debugging layers and levels. 493 */ 494 AcpiDbgLayer = 0; 495 AcpiDbgLevel = 0; 496 #endif 497 498 /* Override OS interfaces if the user requested. */ 499 acpi_reset_interfaces(dev); 500 501 /* Load ACPI name space. */ 502 status = AcpiLoadTables(); 503 if (ACPI_FAILURE(status)) { 504 device_printf(dev, "Could not load Namespace: %s\n", 505 AcpiFormatException(status)); 506 goto out; 507 } 508 509 /* Handle MCFG table if present. */ 510 acpi_enable_pcie(); 511 512 /* 513 * Note that some systems (specifically, those with namespace evaluation 514 * issues that require the avoidance of parts of the namespace) must 515 * avoid running _INI and _STA on everything, as well as dodging the final 516 * object init pass. 517 * 518 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 519 * 520 * XXX We should arrange for the object init pass after we have attached 521 * all our child devices, but on many systems it works here. 522 */ 523 flags = 0; 524 if (testenv("debug.acpi.avoid")) 525 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 526 527 /* Bring the hardware and basic handlers online. */ 528 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 529 device_printf(dev, "Could not enable ACPI: %s\n", 530 AcpiFormatException(status)); 531 goto out; 532 } 533 534 /* 535 * Call the ECDT probe function to provide EC functionality before 536 * the namespace has been evaluated. 537 * 538 * XXX This happens before the sysresource devices have been probed and 539 * attached so its resources come from nexus0. In practice, this isn't 540 * a problem but should be addressed eventually. 541 */ 542 acpi_ec_ecdt_probe(dev); 543 544 /* Bring device objects and regions online. */ 545 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 546 device_printf(dev, "Could not initialize ACPI objects: %s\n", 547 AcpiFormatException(status)); 548 goto out; 549 } 550 551 /* 552 * Setup our sysctl tree. 553 * 554 * XXX: This doesn't check to make sure that none of these fail. 555 */ 556 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 557 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 558 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, device_get_name(dev), 559 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, ""); 560 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 561 OID_AUTO, "supported_sleep_state", 562 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, 563 0, 0, acpi_supported_sleep_state_sysctl, "A", 564 "List supported ACPI sleep states."); 565 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 566 OID_AUTO, "power_button_state", 567 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 568 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", 569 "Power button ACPI sleep state."); 570 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 571 OID_AUTO, "sleep_button_state", 572 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 573 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", 574 "Sleep button ACPI sleep state."); 575 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 576 OID_AUTO, "lid_switch_state", 577 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 578 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", 579 "Lid ACPI sleep state. Set to S3 if you want to suspend your laptop when close the Lid."); 580 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 581 OID_AUTO, "standby_state", 582 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 583 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 584 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 585 OID_AUTO, "suspend_state", 586 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 587 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 588 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 589 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 590 "sleep delay in seconds"); 591 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 592 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 593 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 594 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 595 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 596 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 597 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 598 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 599 OID_AUTO, "handle_reboot", CTLFLAG_RW, 600 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 601 602 /* 603 * Default to 1 second before sleeping to give some machines time to 604 * stabilize. 605 */ 606 sc->acpi_sleep_delay = 1; 607 if (bootverbose) 608 sc->acpi_verbose = 1; 609 if ((env = kern_getenv("hw.acpi.verbose")) != NULL) { 610 if (strcmp(env, "0") != 0) 611 sc->acpi_verbose = 1; 612 freeenv(env); 613 } 614 615 /* Only enable reboot by default if the FADT says it is available. */ 616 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 617 sc->acpi_handle_reboot = 1; 618 619 #if !ACPI_REDUCED_HARDWARE 620 /* Only enable S4BIOS by default if the FACS says it is available. */ 621 if (AcpiGbl_FACS != NULL && AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 622 sc->acpi_s4bios = 1; 623 #endif 624 625 /* Probe all supported sleep states. */ 626 acpi_sleep_states[ACPI_STATE_S0] = TRUE; 627 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 628 if (ACPI_SUCCESS(AcpiEvaluateObject(ACPI_ROOT_OBJECT, 629 __DECONST(char *, AcpiGbl_SleepStateNames[state]), NULL, NULL)) && 630 ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 631 acpi_sleep_states[state] = TRUE; 632 633 /* 634 * Dispatch the default sleep state to devices. The lid switch is set 635 * to UNKNOWN by default to avoid surprising users. 636 */ 637 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ? 638 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN; 639 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN; 640 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ? 641 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN; 642 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ? 643 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN; 644 645 /* Pick the first valid sleep state for the sleep button default. */ 646 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN; 647 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 648 if (acpi_sleep_states[state]) { 649 sc->acpi_sleep_button_sx = state; 650 break; 651 } 652 653 acpi_enable_fixed_events(sc); 654 655 /* 656 * Scan the namespace and attach/initialise children. 657 */ 658 659 /* Register our shutdown handler. */ 660 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 661 SHUTDOWN_PRI_LAST); 662 663 /* 664 * Register our acpi event handlers. 665 * XXX should be configurable eg. via userland policy manager. 666 */ 667 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 668 sc, ACPI_EVENT_PRI_LAST); 669 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 670 sc, ACPI_EVENT_PRI_LAST); 671 672 /* Flag our initial states. */ 673 sc->acpi_enabled = TRUE; 674 sc->acpi_sstate = ACPI_STATE_S0; 675 sc->acpi_sleep_disabled = TRUE; 676 677 /* Create the control device */ 678 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0664, 679 "acpi"); 680 sc->acpi_dev_t->si_drv1 = sc; 681 682 if ((error = acpi_machdep_init(dev))) 683 goto out; 684 685 /* Register ACPI again to pass the correct argument of pm_func. */ 686 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 687 688 acpi_platform_osc(dev); 689 690 if (!acpi_disabled("bus")) { 691 EVENTHANDLER_REGISTER(dev_lookup, acpi_lookup, NULL, 1000); 692 acpi_probe_children(dev); 693 } 694 695 /* Update all GPEs and enable runtime GPEs. */ 696 status = AcpiUpdateAllGpes(); 697 if (ACPI_FAILURE(status)) 698 device_printf(dev, "Could not update all GPEs: %s\n", 699 AcpiFormatException(status)); 700 701 /* Allow sleep request after a while. */ 702 callout_init_mtx(&acpi_sleep_timer, &acpi_mutex, 0); 703 callout_reset(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME, 704 acpi_sleep_enable, sc); 705 706 error = 0; 707 708 out: 709 return_VALUE (error); 710 } 711 712 static void 713 acpi_set_power_children(device_t dev, int state) 714 { 715 device_t child; 716 device_t *devlist; 717 int dstate, i, numdevs; 718 719 if (device_get_children(dev, &devlist, &numdevs) != 0) 720 return; 721 722 /* 723 * Retrieve and set D-state for the sleep state if _SxD is present. 724 * Skip children who aren't attached since they are handled separately. 725 */ 726 for (i = 0; i < numdevs; i++) { 727 child = devlist[i]; 728 dstate = state; 729 if (device_is_attached(child) && 730 acpi_device_pwr_for_sleep(dev, child, &dstate) == 0) 731 acpi_set_powerstate(child, dstate); 732 } 733 free(devlist, M_TEMP); 734 } 735 736 static int 737 acpi_suspend(device_t dev) 738 { 739 int error; 740 741 GIANT_REQUIRED; 742 743 error = bus_generic_suspend(dev); 744 if (error == 0) 745 acpi_set_power_children(dev, ACPI_STATE_D3); 746 747 return (error); 748 } 749 750 static int 751 acpi_resume(device_t dev) 752 { 753 754 GIANT_REQUIRED; 755 756 acpi_set_power_children(dev, ACPI_STATE_D0); 757 758 return (bus_generic_resume(dev)); 759 } 760 761 static int 762 acpi_shutdown(device_t dev) 763 { 764 765 GIANT_REQUIRED; 766 767 /* Allow children to shutdown first. */ 768 bus_generic_shutdown(dev); 769 770 /* 771 * Enable any GPEs that are able to power-on the system (i.e., RTC). 772 * Also, disable any that are not valid for this state (most). 773 */ 774 acpi_wake_prep_walk(ACPI_STATE_S5); 775 776 return (0); 777 } 778 779 /* 780 * Handle a new device being added 781 */ 782 static device_t 783 acpi_add_child(device_t bus, u_int order, const char *name, int unit) 784 { 785 struct acpi_device *ad; 786 device_t child; 787 788 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 789 return (NULL); 790 791 resource_list_init(&ad->ad_rl); 792 793 child = device_add_child_ordered(bus, order, name, unit); 794 if (child != NULL) 795 device_set_ivars(child, ad); 796 else 797 free(ad, M_ACPIDEV); 798 return (child); 799 } 800 801 static int 802 acpi_print_child(device_t bus, device_t child) 803 { 804 struct acpi_device *adev = device_get_ivars(child); 805 struct resource_list *rl = &adev->ad_rl; 806 int retval = 0; 807 808 retval += bus_print_child_header(bus, child); 809 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx"); 810 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#jx"); 811 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd"); 812 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%jd"); 813 if (device_get_flags(child)) 814 retval += printf(" flags %#x", device_get_flags(child)); 815 retval += bus_print_child_domain(bus, child); 816 retval += bus_print_child_footer(bus, child); 817 818 return (retval); 819 } 820 821 /* 822 * If this device is an ACPI child but no one claimed it, attempt 823 * to power it off. We'll power it back up when a driver is added. 824 * 825 * XXX Disabled for now since many necessary devices (like fdc and 826 * ATA) don't claim the devices we created for them but still expect 827 * them to be powered up. 828 */ 829 static void 830 acpi_probe_nomatch(device_t bus, device_t child) 831 { 832 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 833 acpi_set_powerstate(child, ACPI_STATE_D3); 834 #endif 835 } 836 837 /* 838 * If a new driver has a chance to probe a child, first power it up. 839 * 840 * XXX Disabled for now (see acpi_probe_nomatch for details). 841 */ 842 static void 843 acpi_driver_added(device_t dev, driver_t *driver) 844 { 845 device_t child, *devlist; 846 int i, numdevs; 847 848 DEVICE_IDENTIFY(driver, dev); 849 if (device_get_children(dev, &devlist, &numdevs)) 850 return; 851 for (i = 0; i < numdevs; i++) { 852 child = devlist[i]; 853 if (device_get_state(child) == DS_NOTPRESENT) { 854 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 855 acpi_set_powerstate(child, ACPI_STATE_D0); 856 if (device_probe_and_attach(child) != 0) 857 acpi_set_powerstate(child, ACPI_STATE_D3); 858 #else 859 device_probe_and_attach(child); 860 #endif 861 } 862 } 863 free(devlist, M_TEMP); 864 } 865 866 /* Location hint for devctl(8) */ 867 static int 868 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 869 size_t buflen) 870 { 871 struct acpi_device *dinfo = device_get_ivars(child); 872 char buf2[32]; 873 int pxm; 874 875 if (dinfo->ad_handle) { 876 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 877 if (ACPI_SUCCESS(acpi_GetInteger(dinfo->ad_handle, "_PXM", &pxm))) { 878 snprintf(buf2, 32, " _PXM=%d", pxm); 879 strlcat(buf, buf2, buflen); 880 } 881 } else { 882 snprintf(buf, buflen, ""); 883 } 884 return (0); 885 } 886 887 /* PnP information for devctl(8) */ 888 int 889 acpi_pnpinfo_str(ACPI_HANDLE handle, char *buf, size_t buflen) 890 { 891 ACPI_DEVICE_INFO *adinfo; 892 893 if (ACPI_FAILURE(AcpiGetObjectInfo(handle, &adinfo))) { 894 snprintf(buf, buflen, "unknown"); 895 return (0); 896 } 897 898 snprintf(buf, buflen, "_HID=%s _UID=%lu _CID=%s", 899 (adinfo->Valid & ACPI_VALID_HID) ? 900 adinfo->HardwareId.String : "none", 901 (adinfo->Valid & ACPI_VALID_UID) ? 902 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL, 903 ((adinfo->Valid & ACPI_VALID_CID) && 904 adinfo->CompatibleIdList.Count > 0) ? 905 adinfo->CompatibleIdList.Ids[0].String : "none"); 906 AcpiOsFree(adinfo); 907 908 return (0); 909 } 910 911 static int 912 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 913 size_t buflen) 914 { 915 struct acpi_device *dinfo = device_get_ivars(child); 916 917 return (acpi_pnpinfo_str(dinfo->ad_handle, buf, buflen)); 918 } 919 920 /* 921 * Handle device deletion. 922 */ 923 static void 924 acpi_child_deleted(device_t dev, device_t child) 925 { 926 struct acpi_device *dinfo = device_get_ivars(child); 927 928 if (acpi_get_device(dinfo->ad_handle) == child) 929 AcpiDetachData(dinfo->ad_handle, acpi_fake_objhandler); 930 } 931 932 /* 933 * Handle per-device ivars 934 */ 935 static int 936 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 937 { 938 struct acpi_device *ad; 939 940 if ((ad = device_get_ivars(child)) == NULL) { 941 device_printf(child, "device has no ivars\n"); 942 return (ENOENT); 943 } 944 945 /* ACPI and ISA compatibility ivars */ 946 switch(index) { 947 case ACPI_IVAR_HANDLE: 948 *(ACPI_HANDLE *)result = ad->ad_handle; 949 break; 950 case ACPI_IVAR_PRIVATE: 951 *(void **)result = ad->ad_private; 952 break; 953 case ACPI_IVAR_FLAGS: 954 *(int *)result = ad->ad_flags; 955 break; 956 case ISA_IVAR_VENDORID: 957 case ISA_IVAR_SERIAL: 958 case ISA_IVAR_COMPATID: 959 *(int *)result = -1; 960 break; 961 case ISA_IVAR_LOGICALID: 962 *(int *)result = acpi_isa_get_logicalid(child); 963 break; 964 case PCI_IVAR_CLASS: 965 *(uint8_t*)result = (ad->ad_cls_class >> 16) & 0xff; 966 break; 967 case PCI_IVAR_SUBCLASS: 968 *(uint8_t*)result = (ad->ad_cls_class >> 8) & 0xff; 969 break; 970 case PCI_IVAR_PROGIF: 971 *(uint8_t*)result = (ad->ad_cls_class >> 0) & 0xff; 972 break; 973 default: 974 return (ENOENT); 975 } 976 977 return (0); 978 } 979 980 static int 981 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 982 { 983 struct acpi_device *ad; 984 985 if ((ad = device_get_ivars(child)) == NULL) { 986 device_printf(child, "device has no ivars\n"); 987 return (ENOENT); 988 } 989 990 switch(index) { 991 case ACPI_IVAR_HANDLE: 992 ad->ad_handle = (ACPI_HANDLE)value; 993 break; 994 case ACPI_IVAR_PRIVATE: 995 ad->ad_private = (void *)value; 996 break; 997 case ACPI_IVAR_FLAGS: 998 ad->ad_flags = (int)value; 999 break; 1000 default: 1001 panic("bad ivar write request (%d)", index); 1002 return (ENOENT); 1003 } 1004 1005 return (0); 1006 } 1007 1008 /* 1009 * Handle child resource allocation/removal 1010 */ 1011 static struct resource_list * 1012 acpi_get_rlist(device_t dev, device_t child) 1013 { 1014 struct acpi_device *ad; 1015 1016 ad = device_get_ivars(child); 1017 return (&ad->ad_rl); 1018 } 1019 1020 static int 1021 acpi_match_resource_hint(device_t dev, int type, long value) 1022 { 1023 struct acpi_device *ad = device_get_ivars(dev); 1024 struct resource_list *rl = &ad->ad_rl; 1025 struct resource_list_entry *rle; 1026 1027 STAILQ_FOREACH(rle, rl, link) { 1028 if (rle->type != type) 1029 continue; 1030 if (rle->start <= value && rle->end >= value) 1031 return (1); 1032 } 1033 return (0); 1034 } 1035 1036 /* 1037 * Wire device unit numbers based on resource matches in hints. 1038 */ 1039 static void 1040 acpi_hint_device_unit(device_t acdev, device_t child, const char *name, 1041 int *unitp) 1042 { 1043 const char *s; 1044 long value; 1045 int line, matches, unit; 1046 1047 /* 1048 * Iterate over all the hints for the devices with the specified 1049 * name to see if one's resources are a subset of this device. 1050 */ 1051 line = 0; 1052 while (resource_find_dev(&line, name, &unit, "at", NULL) == 0) { 1053 /* Must have an "at" for acpi or isa. */ 1054 resource_string_value(name, unit, "at", &s); 1055 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 || 1056 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0)) 1057 continue; 1058 1059 /* 1060 * Check for matching resources. We must have at least one match. 1061 * Since I/O and memory resources cannot be shared, if we get a 1062 * match on either of those, ignore any mismatches in IRQs or DRQs. 1063 * 1064 * XXX: We may want to revisit this to be more lenient and wire 1065 * as long as it gets one match. 1066 */ 1067 matches = 0; 1068 if (resource_long_value(name, unit, "port", &value) == 0) { 1069 /* 1070 * Floppy drive controllers are notorious for having a 1071 * wide variety of resources not all of which include the 1072 * first port that is specified by the hint (typically 1073 * 0x3f0) (see the comment above fdc_isa_alloc_resources() 1074 * in fdc_isa.c). However, they do all seem to include 1075 * port + 2 (e.g. 0x3f2) so for a floppy device, look for 1076 * 'value + 2' in the port resources instead of the hint 1077 * value. 1078 */ 1079 if (strcmp(name, "fdc") == 0) 1080 value += 2; 1081 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) 1082 matches++; 1083 else 1084 continue; 1085 } 1086 if (resource_long_value(name, unit, "maddr", &value) == 0) { 1087 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value)) 1088 matches++; 1089 else 1090 continue; 1091 } 1092 if (matches > 0) 1093 goto matched; 1094 if (resource_long_value(name, unit, "irq", &value) == 0) { 1095 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) 1096 matches++; 1097 else 1098 continue; 1099 } 1100 if (resource_long_value(name, unit, "drq", &value) == 0) { 1101 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value)) 1102 matches++; 1103 else 1104 continue; 1105 } 1106 1107 matched: 1108 if (matches > 0) { 1109 /* We have a winner! */ 1110 *unitp = unit; 1111 break; 1112 } 1113 } 1114 } 1115 1116 /* 1117 * Fetch the NUMA domain for a device by mapping the value returned by 1118 * _PXM to a NUMA domain. If the device does not have a _PXM method, 1119 * -2 is returned. If any other error occurs, -1 is returned. 1120 */ 1121 static int 1122 acpi_parse_pxm(device_t dev) 1123 { 1124 #ifdef NUMA 1125 #if defined(__i386__) || defined(__amd64__) || defined(__aarch64__) 1126 ACPI_HANDLE handle; 1127 ACPI_STATUS status; 1128 int pxm; 1129 1130 handle = acpi_get_handle(dev); 1131 if (handle == NULL) 1132 return (-2); 1133 status = acpi_GetInteger(handle, "_PXM", &pxm); 1134 if (ACPI_SUCCESS(status)) 1135 return (acpi_map_pxm_to_vm_domainid(pxm)); 1136 if (status == AE_NOT_FOUND) 1137 return (-2); 1138 #endif 1139 #endif 1140 return (-1); 1141 } 1142 1143 int 1144 acpi_get_cpus(device_t dev, device_t child, enum cpu_sets op, size_t setsize, 1145 cpuset_t *cpuset) 1146 { 1147 int d, error; 1148 1149 d = acpi_parse_pxm(child); 1150 if (d < 0) 1151 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset)); 1152 1153 switch (op) { 1154 case LOCAL_CPUS: 1155 if (setsize != sizeof(cpuset_t)) 1156 return (EINVAL); 1157 *cpuset = cpuset_domain[d]; 1158 return (0); 1159 case INTR_CPUS: 1160 error = bus_generic_get_cpus(dev, child, op, setsize, cpuset); 1161 if (error != 0) 1162 return (error); 1163 if (setsize != sizeof(cpuset_t)) 1164 return (EINVAL); 1165 CPU_AND(cpuset, &cpuset_domain[d]); 1166 return (0); 1167 default: 1168 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset)); 1169 } 1170 } 1171 1172 /* 1173 * Fetch the NUMA domain for the given device 'dev'. 1174 * 1175 * If a device has a _PXM method, map that to a NUMA domain. 1176 * Otherwise, pass the request up to the parent. 1177 * If there's no matching domain or the domain cannot be 1178 * determined, return ENOENT. 1179 */ 1180 int 1181 acpi_get_domain(device_t dev, device_t child, int *domain) 1182 { 1183 int d; 1184 1185 d = acpi_parse_pxm(child); 1186 if (d >= 0) { 1187 *domain = d; 1188 return (0); 1189 } 1190 if (d == -1) 1191 return (ENOENT); 1192 1193 /* No _PXM node; go up a level */ 1194 return (bus_generic_get_domain(dev, child, domain)); 1195 } 1196 1197 /* 1198 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1199 * duplicates, we merge any in the sysresource attach routine. 1200 */ 1201 static int 1202 acpi_sysres_alloc(device_t dev) 1203 { 1204 struct resource *res; 1205 struct resource_list *rl; 1206 struct resource_list_entry *rle; 1207 struct rman *rm; 1208 device_t *children; 1209 int child_count, i; 1210 1211 /* 1212 * Probe/attach any sysresource devices. This would be unnecessary if we 1213 * had multi-pass probe/attach. 1214 */ 1215 if (device_get_children(dev, &children, &child_count) != 0) 1216 return (ENXIO); 1217 for (i = 0; i < child_count; i++) { 1218 if (ACPI_ID_PROBE(dev, children[i], sysres_ids, NULL) <= 0) 1219 device_probe_and_attach(children[i]); 1220 } 1221 free(children, M_TEMP); 1222 1223 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1224 STAILQ_FOREACH(rle, rl, link) { 1225 if (rle->res != NULL) { 1226 device_printf(dev, "duplicate resource for %jx\n", rle->start); 1227 continue; 1228 } 1229 1230 /* Only memory and IO resources are valid here. */ 1231 switch (rle->type) { 1232 case SYS_RES_IOPORT: 1233 rm = &acpi_rman_io; 1234 break; 1235 case SYS_RES_MEMORY: 1236 rm = &acpi_rman_mem; 1237 break; 1238 default: 1239 continue; 1240 } 1241 1242 /* Pre-allocate resource and add to our rman pool. */ 1243 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1244 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 1245 if (res != NULL) { 1246 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1247 rle->res = res; 1248 } else if (bootverbose) 1249 device_printf(dev, "reservation of %jx, %jx (%d) failed\n", 1250 rle->start, rle->count, rle->type); 1251 } 1252 return (0); 1253 } 1254 1255 /* 1256 * Reserve declared resources for devices found during attach once system 1257 * resources have been allocated. 1258 */ 1259 static void 1260 acpi_reserve_resources(device_t dev) 1261 { 1262 struct resource_list_entry *rle; 1263 struct resource_list *rl; 1264 struct acpi_device *ad; 1265 struct acpi_softc *sc; 1266 device_t *children; 1267 int child_count, i; 1268 1269 sc = device_get_softc(dev); 1270 if (device_get_children(dev, &children, &child_count) != 0) 1271 return; 1272 for (i = 0; i < child_count; i++) { 1273 ad = device_get_ivars(children[i]); 1274 rl = &ad->ad_rl; 1275 1276 /* Don't reserve system resources. */ 1277 if (ACPI_ID_PROBE(dev, children[i], sysres_ids, NULL) <= 0) 1278 continue; 1279 1280 STAILQ_FOREACH(rle, rl, link) { 1281 /* 1282 * Don't reserve IRQ resources. There are many sticky things 1283 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET 1284 * when using legacy routing). 1285 */ 1286 if (rle->type == SYS_RES_IRQ) 1287 continue; 1288 1289 /* 1290 * Don't reserve the resource if it is already allocated. 1291 * The acpi_ec(4) driver can allocate its resources early 1292 * if ECDT is present. 1293 */ 1294 if (rle->res != NULL) 1295 continue; 1296 1297 /* 1298 * Try to reserve the resource from our parent. If this 1299 * fails because the resource is a system resource, just 1300 * let it be. The resource range is already reserved so 1301 * that other devices will not use it. If the driver 1302 * needs to allocate the resource, then 1303 * acpi_alloc_resource() will sub-alloc from the system 1304 * resource. 1305 */ 1306 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid, 1307 rle->start, rle->end, rle->count, 0); 1308 } 1309 } 1310 free(children, M_TEMP); 1311 sc->acpi_resources_reserved = 1; 1312 } 1313 1314 static int 1315 acpi_set_resource(device_t dev, device_t child, int type, int rid, 1316 rman_res_t start, rman_res_t count) 1317 { 1318 struct acpi_softc *sc = device_get_softc(dev); 1319 struct acpi_device *ad = device_get_ivars(child); 1320 struct resource_list *rl = &ad->ad_rl; 1321 ACPI_DEVICE_INFO *devinfo; 1322 rman_res_t end; 1323 int allow; 1324 1325 /* Ignore IRQ resources for PCI link devices. */ 1326 if (type == SYS_RES_IRQ && 1327 ACPI_ID_PROBE(dev, child, pcilink_ids, NULL) <= 0) 1328 return (0); 1329 1330 /* 1331 * Ignore most resources for PCI root bridges. Some BIOSes 1332 * incorrectly enumerate the memory ranges they decode as plain 1333 * memory resources instead of as ResourceProducer ranges. Other 1334 * BIOSes incorrectly list system resource entries for I/O ranges 1335 * under the PCI bridge. Do allow the one known-correct case on 1336 * x86 of a PCI bridge claiming the I/O ports used for PCI config 1337 * access. 1338 */ 1339 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 1340 if (ACPI_SUCCESS(AcpiGetObjectInfo(ad->ad_handle, &devinfo))) { 1341 if ((devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0) { 1342 #if defined(__i386__) || defined(__amd64__) 1343 allow = (type == SYS_RES_IOPORT && start == CONF1_ADDR_PORT); 1344 #else 1345 allow = 0; 1346 #endif 1347 if (!allow) { 1348 AcpiOsFree(devinfo); 1349 return (0); 1350 } 1351 } 1352 AcpiOsFree(devinfo); 1353 } 1354 } 1355 1356 #ifdef INTRNG 1357 /* map with default for now */ 1358 if (type == SYS_RES_IRQ) 1359 start = (rman_res_t)acpi_map_intr(child, (u_int)start, 1360 acpi_get_handle(child)); 1361 #endif 1362 1363 /* If the resource is already allocated, fail. */ 1364 if (resource_list_busy(rl, type, rid)) 1365 return (EBUSY); 1366 1367 /* If the resource is already reserved, release it. */ 1368 if (resource_list_reserved(rl, type, rid)) 1369 resource_list_unreserve(rl, dev, child, type, rid); 1370 1371 /* Add the resource. */ 1372 end = (start + count - 1); 1373 resource_list_add(rl, type, rid, start, end, count); 1374 1375 /* Don't reserve resources until the system resources are allocated. */ 1376 if (!sc->acpi_resources_reserved) 1377 return (0); 1378 1379 /* Don't reserve system resources. */ 1380 if (ACPI_ID_PROBE(dev, child, sysres_ids, NULL) <= 0) 1381 return (0); 1382 1383 /* 1384 * Don't reserve IRQ resources. There are many sticky things to 1385 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when 1386 * using legacy routing). 1387 */ 1388 if (type == SYS_RES_IRQ) 1389 return (0); 1390 1391 /* 1392 * Don't reserve resources for CPU devices. Some of these 1393 * resources need to be allocated as shareable, but reservations 1394 * are always non-shareable. 1395 */ 1396 if (device_get_devclass(child) == devclass_find("cpu")) 1397 return (0); 1398 1399 /* 1400 * Reserve the resource. 1401 * 1402 * XXX: Ignores failure for now. Failure here is probably a 1403 * BIOS/firmware bug? 1404 */ 1405 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0); 1406 return (0); 1407 } 1408 1409 static struct resource * 1410 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1411 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 1412 { 1413 #ifndef INTRNG 1414 ACPI_RESOURCE ares; 1415 #endif 1416 struct acpi_device *ad; 1417 struct resource_list_entry *rle; 1418 struct resource_list *rl; 1419 struct resource *res; 1420 int isdefault = RMAN_IS_DEFAULT_RANGE(start, end); 1421 1422 /* 1423 * First attempt at allocating the resource. For direct children, 1424 * use resource_list_alloc() to handle reserved resources. For 1425 * other devices, pass the request up to our parent. 1426 */ 1427 if (bus == device_get_parent(child)) { 1428 ad = device_get_ivars(child); 1429 rl = &ad->ad_rl; 1430 1431 /* 1432 * Simulate the behavior of the ISA bus for direct children 1433 * devices. That is, if a non-default range is specified for 1434 * a resource that doesn't exist, use bus_set_resource() to 1435 * add the resource before allocating it. Note that these 1436 * resources will not be reserved. 1437 */ 1438 if (!isdefault && resource_list_find(rl, type, *rid) == NULL) 1439 resource_list_add(rl, type, *rid, start, end, count); 1440 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count, 1441 flags); 1442 #ifndef INTRNG 1443 if (res != NULL && type == SYS_RES_IRQ) { 1444 /* 1445 * Since bus_config_intr() takes immediate effect, we cannot 1446 * configure the interrupt associated with a device when we 1447 * parse the resources but have to defer it until a driver 1448 * actually allocates the interrupt via bus_alloc_resource(). 1449 * 1450 * XXX: Should we handle the lookup failing? 1451 */ 1452 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1453 acpi_config_intr(child, &ares); 1454 } 1455 #endif 1456 1457 /* 1458 * If this is an allocation of the "default" range for a given 1459 * RID, fetch the exact bounds for this resource from the 1460 * resource list entry to try to allocate the range from the 1461 * system resource regions. 1462 */ 1463 if (res == NULL && isdefault) { 1464 rle = resource_list_find(rl, type, *rid); 1465 if (rle != NULL) { 1466 start = rle->start; 1467 end = rle->end; 1468 count = rle->count; 1469 } 1470 } 1471 } else 1472 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1473 start, end, count, flags); 1474 1475 /* 1476 * If the first attempt failed and this is an allocation of a 1477 * specific range, try to satisfy the request via a suballocation 1478 * from our system resource regions. 1479 */ 1480 if (res == NULL && start + count - 1 == end) 1481 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags); 1482 return (res); 1483 } 1484 1485 /* 1486 * Attempt to allocate a specific resource range from the system 1487 * resource ranges. Note that we only handle memory and I/O port 1488 * system resources. 1489 */ 1490 struct resource * 1491 acpi_alloc_sysres(device_t child, int type, int *rid, rman_res_t start, 1492 rman_res_t end, rman_res_t count, u_int flags) 1493 { 1494 struct rman *rm; 1495 struct resource *res; 1496 1497 switch (type) { 1498 case SYS_RES_IOPORT: 1499 rm = &acpi_rman_io; 1500 break; 1501 case SYS_RES_MEMORY: 1502 rm = &acpi_rman_mem; 1503 break; 1504 default: 1505 return (NULL); 1506 } 1507 1508 KASSERT(start + count - 1 == end, ("wildcard resource range")); 1509 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1510 child); 1511 if (res == NULL) 1512 return (NULL); 1513 1514 rman_set_rid(res, *rid); 1515 1516 /* If requested, activate the resource using the parent's method. */ 1517 if (flags & RF_ACTIVE) 1518 if (bus_activate_resource(child, type, *rid, res) != 0) { 1519 rman_release_resource(res); 1520 return (NULL); 1521 } 1522 1523 return (res); 1524 } 1525 1526 static int 1527 acpi_is_resource_managed(int type, struct resource *r) 1528 { 1529 1530 /* We only handle memory and IO resources through rman. */ 1531 switch (type) { 1532 case SYS_RES_IOPORT: 1533 return (rman_is_region_manager(r, &acpi_rman_io)); 1534 case SYS_RES_MEMORY: 1535 return (rman_is_region_manager(r, &acpi_rman_mem)); 1536 } 1537 return (0); 1538 } 1539 1540 static int 1541 acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r, 1542 rman_res_t start, rman_res_t end) 1543 { 1544 1545 if (acpi_is_resource_managed(type, r)) 1546 return (rman_adjust_resource(r, start, end)); 1547 return (bus_generic_adjust_resource(bus, child, type, r, start, end)); 1548 } 1549 1550 static int 1551 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1552 struct resource *r) 1553 { 1554 int ret; 1555 1556 /* 1557 * If this resource belongs to one of our internal managers, 1558 * deactivate it and release it to the local pool. 1559 */ 1560 if (acpi_is_resource_managed(type, r)) { 1561 if (rman_get_flags(r) & RF_ACTIVE) { 1562 ret = bus_deactivate_resource(child, type, rid, r); 1563 if (ret != 0) 1564 return (ret); 1565 } 1566 return (rman_release_resource(r)); 1567 } 1568 1569 return (bus_generic_rl_release_resource(bus, child, type, rid, r)); 1570 } 1571 1572 static void 1573 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1574 { 1575 struct resource_list *rl; 1576 1577 rl = acpi_get_rlist(bus, child); 1578 if (resource_list_busy(rl, type, rid)) { 1579 device_printf(bus, "delete_resource: Resource still owned by child" 1580 " (type=%d, rid=%d)\n", type, rid); 1581 return; 1582 } 1583 resource_list_unreserve(rl, bus, child, type, rid); 1584 resource_list_delete(rl, type, rid); 1585 } 1586 1587 /* Allocate an IO port or memory resource, given its GAS. */ 1588 int 1589 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1590 struct resource **res, u_int flags) 1591 { 1592 int error, res_type; 1593 1594 error = ENOMEM; 1595 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1596 return (EINVAL); 1597 1598 /* We only support memory and IO spaces. */ 1599 switch (gas->SpaceId) { 1600 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1601 res_type = SYS_RES_MEMORY; 1602 break; 1603 case ACPI_ADR_SPACE_SYSTEM_IO: 1604 res_type = SYS_RES_IOPORT; 1605 break; 1606 default: 1607 return (EOPNOTSUPP); 1608 } 1609 1610 /* 1611 * If the register width is less than 8, assume the BIOS author means 1612 * it is a bit field and just allocate a byte. 1613 */ 1614 if (gas->BitWidth && gas->BitWidth < 8) 1615 gas->BitWidth = 8; 1616 1617 /* Validate the address after we're sure we support the space. */ 1618 if (gas->Address == 0 || gas->BitWidth == 0) 1619 return (EINVAL); 1620 1621 bus_set_resource(dev, res_type, *rid, gas->Address, 1622 gas->BitWidth / 8); 1623 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1624 if (*res != NULL) { 1625 *type = res_type; 1626 error = 0; 1627 } else 1628 bus_delete_resource(dev, res_type, *rid); 1629 1630 return (error); 1631 } 1632 1633 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1634 static uint32_t 1635 acpi_isa_get_logicalid(device_t dev) 1636 { 1637 ACPI_DEVICE_INFO *devinfo; 1638 ACPI_HANDLE h; 1639 uint32_t pnpid; 1640 1641 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1642 1643 /* Fetch and validate the HID. */ 1644 if ((h = acpi_get_handle(dev)) == NULL || 1645 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1646 return_VALUE (0); 1647 1648 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 && 1649 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ? 1650 PNP_EISAID(devinfo->HardwareId.String) : 0; 1651 AcpiOsFree(devinfo); 1652 1653 return_VALUE (pnpid); 1654 } 1655 1656 static int 1657 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1658 { 1659 ACPI_DEVICE_INFO *devinfo; 1660 ACPI_PNP_DEVICE_ID *ids; 1661 ACPI_HANDLE h; 1662 uint32_t *pnpid; 1663 int i, valid; 1664 1665 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1666 1667 pnpid = cids; 1668 1669 /* Fetch and validate the CID */ 1670 if ((h = acpi_get_handle(dev)) == NULL || 1671 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1672 return_VALUE (0); 1673 1674 if ((devinfo->Valid & ACPI_VALID_CID) == 0) { 1675 AcpiOsFree(devinfo); 1676 return_VALUE (0); 1677 } 1678 1679 if (devinfo->CompatibleIdList.Count < count) 1680 count = devinfo->CompatibleIdList.Count; 1681 ids = devinfo->CompatibleIdList.Ids; 1682 for (i = 0, valid = 0; i < count; i++) 1683 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE && 1684 strncmp(ids[i].String, "PNP", 3) == 0) { 1685 *pnpid++ = PNP_EISAID(ids[i].String); 1686 valid++; 1687 } 1688 AcpiOsFree(devinfo); 1689 1690 return_VALUE (valid); 1691 } 1692 1693 static int 1694 acpi_device_id_probe(device_t bus, device_t dev, char **ids, char **match) 1695 { 1696 ACPI_HANDLE h; 1697 ACPI_OBJECT_TYPE t; 1698 int rv; 1699 int i; 1700 1701 h = acpi_get_handle(dev); 1702 if (ids == NULL || h == NULL) 1703 return (ENXIO); 1704 t = acpi_get_type(dev); 1705 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR) 1706 return (ENXIO); 1707 1708 /* Try to match one of the array of IDs with a HID or CID. */ 1709 for (i = 0; ids[i] != NULL; i++) { 1710 rv = acpi_MatchHid(h, ids[i]); 1711 if (rv == ACPI_MATCHHID_NOMATCH) 1712 continue; 1713 1714 if (match != NULL) { 1715 *match = ids[i]; 1716 } 1717 return ((rv == ACPI_MATCHHID_HID)? 1718 BUS_PROBE_DEFAULT : BUS_PROBE_LOW_PRIORITY); 1719 } 1720 return (ENXIO); 1721 } 1722 1723 static ACPI_STATUS 1724 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1725 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1726 { 1727 ACPI_HANDLE h; 1728 1729 if (dev == NULL) 1730 h = ACPI_ROOT_OBJECT; 1731 else if ((h = acpi_get_handle(dev)) == NULL) 1732 return (AE_BAD_PARAMETER); 1733 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1734 } 1735 1736 int 1737 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1738 { 1739 struct acpi_softc *sc; 1740 ACPI_HANDLE handle; 1741 ACPI_STATUS status; 1742 char sxd[8]; 1743 1744 handle = acpi_get_handle(dev); 1745 1746 /* 1747 * XXX If we find these devices, don't try to power them down. 1748 * The serial and IRDA ports on my T23 hang the system when 1749 * set to D3 and it appears that such legacy devices may 1750 * need special handling in their drivers. 1751 */ 1752 if (dstate == NULL || handle == NULL || 1753 acpi_MatchHid(handle, "PNP0500") || 1754 acpi_MatchHid(handle, "PNP0501") || 1755 acpi_MatchHid(handle, "PNP0502") || 1756 acpi_MatchHid(handle, "PNP0510") || 1757 acpi_MatchHid(handle, "PNP0511")) 1758 return (ENXIO); 1759 1760 /* 1761 * Override next state with the value from _SxD, if present. 1762 * Note illegal _S0D is evaluated because some systems expect this. 1763 */ 1764 sc = device_get_softc(bus); 1765 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1766 status = acpi_GetInteger(handle, sxd, dstate); 1767 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 1768 device_printf(dev, "failed to get %s on %s: %s\n", sxd, 1769 acpi_name(handle), AcpiFormatException(status)); 1770 return (ENXIO); 1771 } 1772 1773 return (0); 1774 } 1775 1776 /* Callback arg for our implementation of walking the namespace. */ 1777 struct acpi_device_scan_ctx { 1778 acpi_scan_cb_t user_fn; 1779 void *arg; 1780 ACPI_HANDLE parent; 1781 }; 1782 1783 static ACPI_STATUS 1784 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1785 { 1786 struct acpi_device_scan_ctx *ctx; 1787 device_t dev, old_dev; 1788 ACPI_STATUS status; 1789 ACPI_OBJECT_TYPE type; 1790 1791 /* 1792 * Skip this device if we think we'll have trouble with it or it is 1793 * the parent where the scan began. 1794 */ 1795 ctx = (struct acpi_device_scan_ctx *)arg; 1796 if (acpi_avoid(h) || h == ctx->parent) 1797 return (AE_OK); 1798 1799 /* If this is not a valid device type (e.g., a method), skip it. */ 1800 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1801 return (AE_OK); 1802 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1803 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1804 return (AE_OK); 1805 1806 /* 1807 * Call the user function with the current device. If it is unchanged 1808 * afterwards, return. Otherwise, we update the handle to the new dev. 1809 */ 1810 old_dev = acpi_get_device(h); 1811 dev = old_dev; 1812 status = ctx->user_fn(h, &dev, level, ctx->arg); 1813 if (ACPI_FAILURE(status) || old_dev == dev) 1814 return (status); 1815 1816 /* Remove the old child and its connection to the handle. */ 1817 if (old_dev != NULL) 1818 device_delete_child(device_get_parent(old_dev), old_dev); 1819 1820 /* Recreate the handle association if the user created a device. */ 1821 if (dev != NULL) 1822 AcpiAttachData(h, acpi_fake_objhandler, dev); 1823 1824 return (AE_OK); 1825 } 1826 1827 static ACPI_STATUS 1828 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1829 acpi_scan_cb_t user_fn, void *arg) 1830 { 1831 ACPI_HANDLE h; 1832 struct acpi_device_scan_ctx ctx; 1833 1834 if (acpi_disabled("children")) 1835 return (AE_OK); 1836 1837 if (dev == NULL) 1838 h = ACPI_ROOT_OBJECT; 1839 else if ((h = acpi_get_handle(dev)) == NULL) 1840 return (AE_BAD_PARAMETER); 1841 ctx.user_fn = user_fn; 1842 ctx.arg = arg; 1843 ctx.parent = h; 1844 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1845 acpi_device_scan_cb, NULL, &ctx, NULL)); 1846 } 1847 1848 /* 1849 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1850 * device power states since it's close enough to ACPI. 1851 */ 1852 int 1853 acpi_set_powerstate(device_t child, int state) 1854 { 1855 ACPI_HANDLE h; 1856 ACPI_STATUS status; 1857 1858 h = acpi_get_handle(child); 1859 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) 1860 return (EINVAL); 1861 if (h == NULL) 1862 return (0); 1863 1864 /* Ignore errors if the power methods aren't present. */ 1865 status = acpi_pwr_switch_consumer(h, state); 1866 if (ACPI_SUCCESS(status)) { 1867 if (bootverbose) 1868 device_printf(child, "set ACPI power state D%d on %s\n", 1869 state, acpi_name(h)); 1870 } else if (status != AE_NOT_FOUND) 1871 device_printf(child, 1872 "failed to set ACPI power state D%d on %s: %s\n", state, 1873 acpi_name(h), AcpiFormatException(status)); 1874 1875 return (0); 1876 } 1877 1878 static int 1879 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1880 { 1881 int result, cid_count, i; 1882 uint32_t lid, cids[8]; 1883 1884 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1885 1886 /* 1887 * ISA-style drivers attached to ACPI may persist and 1888 * probe manually if we return ENOENT. We never want 1889 * that to happen, so don't ever return it. 1890 */ 1891 result = ENXIO; 1892 1893 /* Scan the supplied IDs for a match */ 1894 lid = acpi_isa_get_logicalid(child); 1895 cid_count = acpi_isa_get_compatid(child, cids, 8); 1896 while (ids && ids->ip_id) { 1897 if (lid == ids->ip_id) { 1898 result = 0; 1899 goto out; 1900 } 1901 for (i = 0; i < cid_count; i++) { 1902 if (cids[i] == ids->ip_id) { 1903 result = 0; 1904 goto out; 1905 } 1906 } 1907 ids++; 1908 } 1909 1910 out: 1911 if (result == 0 && ids->ip_desc) 1912 device_set_desc(child, ids->ip_desc); 1913 1914 return_VALUE (result); 1915 } 1916 1917 /* 1918 * Look for a MCFG table. If it is present, use the settings for 1919 * domain (segment) 0 to setup PCI config space access via the memory 1920 * map. 1921 * 1922 * On non-x86 architectures (arm64 for now), this will be done from the 1923 * PCI host bridge driver. 1924 */ 1925 static void 1926 acpi_enable_pcie(void) 1927 { 1928 #if defined(__i386__) || defined(__amd64__) 1929 ACPI_TABLE_HEADER *hdr; 1930 ACPI_MCFG_ALLOCATION *alloc, *end; 1931 ACPI_STATUS status; 1932 1933 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1934 if (ACPI_FAILURE(status)) 1935 return; 1936 1937 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1938 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1939 while (alloc < end) { 1940 if (alloc->PciSegment == 0) { 1941 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1942 alloc->EndBusNumber); 1943 return; 1944 } 1945 alloc++; 1946 } 1947 #endif 1948 } 1949 1950 static void 1951 acpi_platform_osc(device_t dev) 1952 { 1953 ACPI_HANDLE sb_handle; 1954 ACPI_STATUS status; 1955 uint32_t cap_set[2]; 1956 1957 /* 0811B06E-4A27-44F9-8D60-3CBBC22E7B48 */ 1958 static uint8_t acpi_platform_uuid[ACPI_UUID_LENGTH] = { 1959 0x6e, 0xb0, 0x11, 0x08, 0x27, 0x4a, 0xf9, 0x44, 1960 0x8d, 0x60, 0x3c, 0xbb, 0xc2, 0x2e, 0x7b, 0x48 1961 }; 1962 1963 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 1964 return; 1965 1966 cap_set[1] = 0x10; /* APEI Support */ 1967 status = acpi_EvaluateOSC(sb_handle, acpi_platform_uuid, 1, 1968 nitems(cap_set), cap_set, cap_set, false); 1969 if (ACPI_FAILURE(status)) { 1970 if (status == AE_NOT_FOUND) 1971 return; 1972 device_printf(dev, "_OSC failed: %s\n", 1973 AcpiFormatException(status)); 1974 return; 1975 } 1976 } 1977 1978 /* 1979 * Scan all of the ACPI namespace and attach child devices. 1980 * 1981 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1982 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1983 * However, in violation of the spec, some systems place their PCI link 1984 * devices in \, so we have to walk the whole namespace. We check the 1985 * type of namespace nodes, so this should be ok. 1986 */ 1987 static void 1988 acpi_probe_children(device_t bus) 1989 { 1990 1991 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1992 1993 /* 1994 * Scan the namespace and insert placeholders for all the devices that 1995 * we find. We also probe/attach any early devices. 1996 * 1997 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1998 * we want to create nodes for all devices, not just those that are 1999 * currently present. (This assumes that we don't want to create/remove 2000 * devices as they appear, which might be smarter.) 2001 */ 2002 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 2003 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 2004 NULL, bus, NULL); 2005 2006 /* Pre-allocate resources for our rman from any sysresource devices. */ 2007 acpi_sysres_alloc(bus); 2008 2009 /* Reserve resources already allocated to children. */ 2010 acpi_reserve_resources(bus); 2011 2012 /* Create any static children by calling device identify methods. */ 2013 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 2014 bus_generic_probe(bus); 2015 2016 /* Probe/attach all children, created statically and from the namespace. */ 2017 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n")); 2018 bus_generic_attach(bus); 2019 2020 /* Attach wake sysctls. */ 2021 acpi_wake_sysctl_walk(bus); 2022 2023 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 2024 return_VOID; 2025 } 2026 2027 /* 2028 * Determine the probe order for a given device. 2029 */ 2030 static void 2031 acpi_probe_order(ACPI_HANDLE handle, int *order) 2032 { 2033 ACPI_OBJECT_TYPE type; 2034 2035 /* 2036 * 0. CPUs 2037 * 1. I/O port and memory system resource holders 2038 * 2. Clocks and timers (to handle early accesses) 2039 * 3. Embedded controllers (to handle early accesses) 2040 * 4. PCI Link Devices 2041 */ 2042 AcpiGetType(handle, &type); 2043 if (type == ACPI_TYPE_PROCESSOR) 2044 *order = 0; 2045 else if (acpi_MatchHid(handle, "PNP0C01") || 2046 acpi_MatchHid(handle, "PNP0C02")) 2047 *order = 1; 2048 else if (acpi_MatchHid(handle, "PNP0100") || 2049 acpi_MatchHid(handle, "PNP0103") || 2050 acpi_MatchHid(handle, "PNP0B00")) 2051 *order = 2; 2052 else if (acpi_MatchHid(handle, "PNP0C09")) 2053 *order = 3; 2054 else if (acpi_MatchHid(handle, "PNP0C0F")) 2055 *order = 4; 2056 } 2057 2058 /* 2059 * Evaluate a child device and determine whether we might attach a device to 2060 * it. 2061 */ 2062 static ACPI_STATUS 2063 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2064 { 2065 ACPI_DEVICE_INFO *devinfo; 2066 struct acpi_device *ad; 2067 struct acpi_prw_data prw; 2068 ACPI_OBJECT_TYPE type; 2069 ACPI_HANDLE h; 2070 device_t bus, child; 2071 char *handle_str; 2072 int order; 2073 2074 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2075 2076 if (acpi_disabled("children")) 2077 return_ACPI_STATUS (AE_OK); 2078 2079 /* Skip this device if we think we'll have trouble with it. */ 2080 if (acpi_avoid(handle)) 2081 return_ACPI_STATUS (AE_OK); 2082 2083 bus = (device_t)context; 2084 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 2085 handle_str = acpi_name(handle); 2086 switch (type) { 2087 case ACPI_TYPE_DEVICE: 2088 /* 2089 * Since we scan from \, be sure to skip system scope objects. 2090 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 2091 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 2092 * during the initialization and \_TZ_ is to support Notify() on it. 2093 */ 2094 if (strcmp(handle_str, "\\_SB_") == 0 || 2095 strcmp(handle_str, "\\_TZ_") == 0) 2096 break; 2097 if (acpi_parse_prw(handle, &prw) == 0) 2098 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 2099 2100 /* 2101 * Ignore devices that do not have a _HID or _CID. They should 2102 * be discovered by other buses (e.g. the PCI bus driver). 2103 */ 2104 if (!acpi_has_hid(handle)) 2105 break; 2106 /* FALLTHROUGH */ 2107 case ACPI_TYPE_PROCESSOR: 2108 case ACPI_TYPE_THERMAL: 2109 case ACPI_TYPE_POWER: 2110 /* 2111 * Create a placeholder device for this node. Sort the 2112 * placeholder so that the probe/attach passes will run 2113 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 2114 * are reserved for special objects (i.e., system 2115 * resources). 2116 */ 2117 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 2118 order = level * 10 + ACPI_DEV_BASE_ORDER; 2119 acpi_probe_order(handle, &order); 2120 child = BUS_ADD_CHILD(bus, order, NULL, -1); 2121 if (child == NULL) 2122 break; 2123 2124 /* Associate the handle with the device_t and vice versa. */ 2125 acpi_set_handle(child, handle); 2126 AcpiAttachData(handle, acpi_fake_objhandler, child); 2127 2128 /* 2129 * Check that the device is present. If it's not present, 2130 * leave it disabled (so that we have a device_t attached to 2131 * the handle, but we don't probe it). 2132 * 2133 * XXX PCI link devices sometimes report "present" but not 2134 * "functional" (i.e. if disabled). Go ahead and probe them 2135 * anyway since we may enable them later. 2136 */ 2137 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 2138 /* Never disable PCI link devices. */ 2139 if (acpi_MatchHid(handle, "PNP0C0F")) 2140 break; 2141 /* 2142 * Docking stations should remain enabled since the system 2143 * may be undocked at boot. 2144 */ 2145 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 2146 break; 2147 2148 device_disable(child); 2149 break; 2150 } 2151 2152 /* 2153 * Get the device's resource settings and attach them. 2154 * Note that if the device has _PRS but no _CRS, we need 2155 * to decide when it's appropriate to try to configure the 2156 * device. Ignore the return value here; it's OK for the 2157 * device not to have any resources. 2158 */ 2159 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 2160 2161 ad = device_get_ivars(child); 2162 ad->ad_cls_class = 0xffffff; 2163 if (ACPI_SUCCESS(AcpiGetObjectInfo(handle, &devinfo))) { 2164 if ((devinfo->Valid & ACPI_VALID_CLS) != 0 && 2165 devinfo->ClassCode.Length >= ACPI_PCICLS_STRING_SIZE) { 2166 ad->ad_cls_class = strtoul(devinfo->ClassCode.String, 2167 NULL, 16); 2168 } 2169 AcpiOsFree(devinfo); 2170 } 2171 break; 2172 } 2173 } 2174 2175 return_ACPI_STATUS (AE_OK); 2176 } 2177 2178 /* 2179 * AcpiAttachData() requires an object handler but never uses it. This is a 2180 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 2181 */ 2182 void 2183 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 2184 { 2185 } 2186 2187 static void 2188 acpi_shutdown_final(void *arg, int howto) 2189 { 2190 struct acpi_softc *sc = (struct acpi_softc *)arg; 2191 register_t intr; 2192 ACPI_STATUS status; 2193 2194 /* 2195 * XXX Shutdown code should only run on the BSP (cpuid 0). 2196 * Some chipsets do not power off the system correctly if called from 2197 * an AP. 2198 */ 2199 if ((howto & RB_POWEROFF) != 0) { 2200 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 2201 if (ACPI_FAILURE(status)) { 2202 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2203 AcpiFormatException(status)); 2204 return; 2205 } 2206 device_printf(sc->acpi_dev, "Powering system off\n"); 2207 intr = intr_disable(); 2208 status = AcpiEnterSleepState(ACPI_STATE_S5); 2209 if (ACPI_FAILURE(status)) { 2210 intr_restore(intr); 2211 device_printf(sc->acpi_dev, "power-off failed - %s\n", 2212 AcpiFormatException(status)); 2213 } else { 2214 DELAY(1000000); 2215 intr_restore(intr); 2216 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 2217 } 2218 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 2219 /* Reboot using the reset register. */ 2220 status = AcpiReset(); 2221 if (ACPI_SUCCESS(status)) { 2222 DELAY(1000000); 2223 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 2224 } else if (status != AE_NOT_EXIST) 2225 device_printf(sc->acpi_dev, "reset failed - %s\n", 2226 AcpiFormatException(status)); 2227 } else if (sc->acpi_do_disable && !KERNEL_PANICKED()) { 2228 /* 2229 * Only disable ACPI if the user requested. On some systems, writing 2230 * the disable value to SMI_CMD hangs the system. 2231 */ 2232 device_printf(sc->acpi_dev, "Shutting down\n"); 2233 AcpiTerminate(); 2234 } 2235 } 2236 2237 static void 2238 acpi_enable_fixed_events(struct acpi_softc *sc) 2239 { 2240 static int first_time = 1; 2241 2242 /* Enable and clear fixed events and install handlers. */ 2243 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 2244 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2245 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 2246 acpi_event_power_button_sleep, sc); 2247 if (first_time) 2248 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 2249 } 2250 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 2251 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 2252 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 2253 acpi_event_sleep_button_sleep, sc); 2254 if (first_time) 2255 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 2256 } 2257 2258 first_time = 0; 2259 } 2260 2261 /* 2262 * Returns true if the device is actually present and should 2263 * be attached to. This requires the present, enabled, UI-visible 2264 * and diagnostics-passed bits to be set. 2265 */ 2266 BOOLEAN 2267 acpi_DeviceIsPresent(device_t dev) 2268 { 2269 ACPI_HANDLE h; 2270 UINT32 s; 2271 ACPI_STATUS status; 2272 2273 h = acpi_get_handle(dev); 2274 if (h == NULL) 2275 return (FALSE); 2276 2277 #ifdef ACPI_EARLY_EPYC_WAR 2278 /* 2279 * Certain Treadripper boards always returns 0 for FreeBSD because it 2280 * only returns non-zero for the OS string "Windows 2015". Otherwise it 2281 * will return zero. Force them to always be treated as present. 2282 * Beata versions were worse: they always returned 0. 2283 */ 2284 if (acpi_MatchHid(h, "AMDI0020") || acpi_MatchHid(h, "AMDI0010")) 2285 return (TRUE); 2286 #endif 2287 2288 status = acpi_GetInteger(h, "_STA", &s); 2289 2290 /* 2291 * If no _STA method or if it failed, then assume that 2292 * the device is present. 2293 */ 2294 if (ACPI_FAILURE(status)) 2295 return (TRUE); 2296 2297 return (ACPI_DEVICE_PRESENT(s) ? TRUE : FALSE); 2298 } 2299 2300 /* 2301 * Returns true if the battery is actually present and inserted. 2302 */ 2303 BOOLEAN 2304 acpi_BatteryIsPresent(device_t dev) 2305 { 2306 ACPI_HANDLE h; 2307 UINT32 s; 2308 ACPI_STATUS status; 2309 2310 h = acpi_get_handle(dev); 2311 if (h == NULL) 2312 return (FALSE); 2313 status = acpi_GetInteger(h, "_STA", &s); 2314 2315 /* 2316 * If no _STA method or if it failed, then assume that 2317 * the device is present. 2318 */ 2319 if (ACPI_FAILURE(status)) 2320 return (TRUE); 2321 2322 return (ACPI_BATTERY_PRESENT(s) ? TRUE : FALSE); 2323 } 2324 2325 /* 2326 * Returns true if a device has at least one valid device ID. 2327 */ 2328 BOOLEAN 2329 acpi_has_hid(ACPI_HANDLE h) 2330 { 2331 ACPI_DEVICE_INFO *devinfo; 2332 BOOLEAN ret; 2333 2334 if (h == NULL || 2335 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2336 return (FALSE); 2337 2338 ret = FALSE; 2339 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 2340 ret = TRUE; 2341 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2342 if (devinfo->CompatibleIdList.Count > 0) 2343 ret = TRUE; 2344 2345 AcpiOsFree(devinfo); 2346 return (ret); 2347 } 2348 2349 /* 2350 * Match a HID string against a handle 2351 * returns ACPI_MATCHHID_HID if _HID match 2352 * ACPI_MATCHHID_CID if _CID match and not _HID match. 2353 * ACPI_MATCHHID_NOMATCH=0 if no match. 2354 */ 2355 int 2356 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 2357 { 2358 ACPI_DEVICE_INFO *devinfo; 2359 BOOLEAN ret; 2360 int i; 2361 2362 if (hid == NULL || h == NULL || 2363 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2364 return (ACPI_MATCHHID_NOMATCH); 2365 2366 ret = ACPI_MATCHHID_NOMATCH; 2367 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 2368 strcmp(hid, devinfo->HardwareId.String) == 0) 2369 ret = ACPI_MATCHHID_HID; 2370 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2371 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 2372 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 2373 ret = ACPI_MATCHHID_CID; 2374 break; 2375 } 2376 } 2377 2378 AcpiOsFree(devinfo); 2379 return (ret); 2380 } 2381 2382 /* 2383 * Return the handle of a named object within our scope, ie. that of (parent) 2384 * or one if its parents. 2385 */ 2386 ACPI_STATUS 2387 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2388 { 2389 ACPI_HANDLE r; 2390 ACPI_STATUS status; 2391 2392 /* Walk back up the tree to the root */ 2393 for (;;) { 2394 status = AcpiGetHandle(parent, path, &r); 2395 if (ACPI_SUCCESS(status)) { 2396 *result = r; 2397 return (AE_OK); 2398 } 2399 /* XXX Return error here? */ 2400 if (status != AE_NOT_FOUND) 2401 return (AE_OK); 2402 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2403 return (AE_NOT_FOUND); 2404 parent = r; 2405 } 2406 } 2407 2408 /* 2409 * Allocate a buffer with a preset data size. 2410 */ 2411 ACPI_BUFFER * 2412 acpi_AllocBuffer(int size) 2413 { 2414 ACPI_BUFFER *buf; 2415 2416 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2417 return (NULL); 2418 buf->Length = size; 2419 buf->Pointer = (void *)(buf + 1); 2420 return (buf); 2421 } 2422 2423 ACPI_STATUS 2424 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2425 { 2426 ACPI_OBJECT arg1; 2427 ACPI_OBJECT_LIST args; 2428 2429 arg1.Type = ACPI_TYPE_INTEGER; 2430 arg1.Integer.Value = number; 2431 args.Count = 1; 2432 args.Pointer = &arg1; 2433 2434 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2435 } 2436 2437 /* 2438 * Evaluate a path that should return an integer. 2439 */ 2440 ACPI_STATUS 2441 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2442 { 2443 ACPI_STATUS status; 2444 ACPI_BUFFER buf; 2445 ACPI_OBJECT param; 2446 2447 if (handle == NULL) 2448 handle = ACPI_ROOT_OBJECT; 2449 2450 /* 2451 * Assume that what we've been pointed at is an Integer object, or 2452 * a method that will return an Integer. 2453 */ 2454 buf.Pointer = ¶m; 2455 buf.Length = sizeof(param); 2456 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2457 if (ACPI_SUCCESS(status)) { 2458 if (param.Type == ACPI_TYPE_INTEGER) 2459 *number = param.Integer.Value; 2460 else 2461 status = AE_TYPE; 2462 } 2463 2464 /* 2465 * In some applications, a method that's expected to return an Integer 2466 * may instead return a Buffer (probably to simplify some internal 2467 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2468 * convert it into an Integer as best we can. 2469 * 2470 * This is a hack. 2471 */ 2472 if (status == AE_BUFFER_OVERFLOW) { 2473 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2474 status = AE_NO_MEMORY; 2475 } else { 2476 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2477 if (ACPI_SUCCESS(status)) 2478 status = acpi_ConvertBufferToInteger(&buf, number); 2479 AcpiOsFree(buf.Pointer); 2480 } 2481 } 2482 return (status); 2483 } 2484 2485 ACPI_STATUS 2486 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2487 { 2488 ACPI_OBJECT *p; 2489 UINT8 *val; 2490 int i; 2491 2492 p = (ACPI_OBJECT *)bufp->Pointer; 2493 if (p->Type == ACPI_TYPE_INTEGER) { 2494 *number = p->Integer.Value; 2495 return (AE_OK); 2496 } 2497 if (p->Type != ACPI_TYPE_BUFFER) 2498 return (AE_TYPE); 2499 if (p->Buffer.Length > sizeof(int)) 2500 return (AE_BAD_DATA); 2501 2502 *number = 0; 2503 val = p->Buffer.Pointer; 2504 for (i = 0; i < p->Buffer.Length; i++) 2505 *number += val[i] << (i * 8); 2506 return (AE_OK); 2507 } 2508 2509 /* 2510 * Iterate over the elements of an a package object, calling the supplied 2511 * function for each element. 2512 * 2513 * XXX possible enhancement might be to abort traversal on error. 2514 */ 2515 ACPI_STATUS 2516 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2517 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2518 { 2519 ACPI_OBJECT *comp; 2520 int i; 2521 2522 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2523 return (AE_BAD_PARAMETER); 2524 2525 /* Iterate over components */ 2526 i = 0; 2527 comp = pkg->Package.Elements; 2528 for (; i < pkg->Package.Count; i++, comp++) 2529 func(comp, arg); 2530 2531 return (AE_OK); 2532 } 2533 2534 /* 2535 * Find the (index)th resource object in a set. 2536 */ 2537 ACPI_STATUS 2538 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2539 { 2540 ACPI_RESOURCE *rp; 2541 int i; 2542 2543 rp = (ACPI_RESOURCE *)buf->Pointer; 2544 i = index; 2545 while (i-- > 0) { 2546 /* Range check */ 2547 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2548 return (AE_BAD_PARAMETER); 2549 2550 /* Check for terminator */ 2551 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2552 return (AE_NOT_FOUND); 2553 rp = ACPI_NEXT_RESOURCE(rp); 2554 } 2555 if (resp != NULL) 2556 *resp = rp; 2557 2558 return (AE_OK); 2559 } 2560 2561 /* 2562 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2563 * 2564 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2565 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2566 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2567 * resources. 2568 */ 2569 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2570 2571 ACPI_STATUS 2572 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2573 { 2574 ACPI_RESOURCE *rp; 2575 void *newp; 2576 2577 /* Initialise the buffer if necessary. */ 2578 if (buf->Pointer == NULL) { 2579 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2580 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2581 return (AE_NO_MEMORY); 2582 rp = (ACPI_RESOURCE *)buf->Pointer; 2583 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2584 rp->Length = ACPI_RS_SIZE_MIN; 2585 } 2586 if (res == NULL) 2587 return (AE_OK); 2588 2589 /* 2590 * Scan the current buffer looking for the terminator. 2591 * This will either find the terminator or hit the end 2592 * of the buffer and return an error. 2593 */ 2594 rp = (ACPI_RESOURCE *)buf->Pointer; 2595 for (;;) { 2596 /* Range check, don't go outside the buffer */ 2597 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2598 return (AE_BAD_PARAMETER); 2599 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2600 break; 2601 rp = ACPI_NEXT_RESOURCE(rp); 2602 } 2603 2604 /* 2605 * Check the size of the buffer and expand if required. 2606 * 2607 * Required size is: 2608 * size of existing resources before terminator + 2609 * size of new resource and header + 2610 * size of terminator. 2611 * 2612 * Note that this loop should really only run once, unless 2613 * for some reason we are stuffing a *really* huge resource. 2614 */ 2615 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2616 res->Length + ACPI_RS_SIZE_NO_DATA + 2617 ACPI_RS_SIZE_MIN) >= buf->Length) { 2618 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2619 return (AE_NO_MEMORY); 2620 bcopy(buf->Pointer, newp, buf->Length); 2621 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2622 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2623 AcpiOsFree(buf->Pointer); 2624 buf->Pointer = newp; 2625 buf->Length += buf->Length; 2626 } 2627 2628 /* Insert the new resource. */ 2629 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2630 2631 /* And add the terminator. */ 2632 rp = ACPI_NEXT_RESOURCE(rp); 2633 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2634 rp->Length = ACPI_RS_SIZE_MIN; 2635 2636 return (AE_OK); 2637 } 2638 2639 UINT64 2640 acpi_DSMQuery(ACPI_HANDLE h, const uint8_t *uuid, int revision) 2641 { 2642 /* 2643 * ACPI spec 9.1.1 defines this. 2644 * 2645 * "Arg2: Function Index Represents a specific function whose meaning is 2646 * specific to the UUID and Revision ID. Function indices should start 2647 * with 1. Function number zero is a query function (see the special 2648 * return code defined below)." 2649 */ 2650 ACPI_BUFFER buf; 2651 ACPI_OBJECT *obj; 2652 UINT64 ret = 0; 2653 int i; 2654 2655 if (!ACPI_SUCCESS(acpi_EvaluateDSM(h, uuid, revision, 0, NULL, &buf))) { 2656 ACPI_INFO(("Failed to enumerate DSM functions\n")); 2657 return (0); 2658 } 2659 2660 obj = (ACPI_OBJECT *)buf.Pointer; 2661 KASSERT(obj, ("Object not allowed to be NULL\n")); 2662 2663 /* 2664 * From ACPI 6.2 spec 9.1.1: 2665 * If Function Index = 0, a Buffer containing a function index bitfield. 2666 * Otherwise, the return value and type depends on the UUID and revision 2667 * ID (see below). 2668 */ 2669 switch (obj->Type) { 2670 case ACPI_TYPE_BUFFER: 2671 for (i = 0; i < MIN(obj->Buffer.Length, sizeof(ret)); i++) 2672 ret |= (((uint64_t)obj->Buffer.Pointer[i]) << (i * 8)); 2673 break; 2674 case ACPI_TYPE_INTEGER: 2675 ACPI_BIOS_WARNING((AE_INFO, 2676 "Possibly buggy BIOS with ACPI_TYPE_INTEGER for function enumeration\n")); 2677 ret = obj->Integer.Value; 2678 break; 2679 default: 2680 ACPI_WARNING((AE_INFO, "Unexpected return type %u\n", obj->Type)); 2681 }; 2682 2683 AcpiOsFree(obj); 2684 return ret; 2685 } 2686 2687 /* 2688 * DSM may return multiple types depending on the function. It is therefore 2689 * unsafe to use the typed evaluation. It is highly recommended that the caller 2690 * check the type of the returned object. 2691 */ 2692 ACPI_STATUS 2693 acpi_EvaluateDSM(ACPI_HANDLE handle, const uint8_t *uuid, int revision, 2694 UINT64 function, ACPI_OBJECT *package, ACPI_BUFFER *out_buf) 2695 { 2696 return (acpi_EvaluateDSMTyped(handle, uuid, revision, function, 2697 package, out_buf, ACPI_TYPE_ANY)); 2698 } 2699 2700 ACPI_STATUS 2701 acpi_EvaluateDSMTyped(ACPI_HANDLE handle, const uint8_t *uuid, int revision, 2702 UINT64 function, ACPI_OBJECT *package, ACPI_BUFFER *out_buf, 2703 ACPI_OBJECT_TYPE type) 2704 { 2705 ACPI_OBJECT arg[4]; 2706 ACPI_OBJECT_LIST arglist; 2707 ACPI_BUFFER buf; 2708 ACPI_STATUS status; 2709 2710 if (out_buf == NULL) 2711 return (AE_NO_MEMORY); 2712 2713 arg[0].Type = ACPI_TYPE_BUFFER; 2714 arg[0].Buffer.Length = ACPI_UUID_LENGTH; 2715 arg[0].Buffer.Pointer = __DECONST(uint8_t *, uuid); 2716 arg[1].Type = ACPI_TYPE_INTEGER; 2717 arg[1].Integer.Value = revision; 2718 arg[2].Type = ACPI_TYPE_INTEGER; 2719 arg[2].Integer.Value = function; 2720 if (package) { 2721 arg[3] = *package; 2722 } else { 2723 arg[3].Type = ACPI_TYPE_PACKAGE; 2724 arg[3].Package.Count = 0; 2725 arg[3].Package.Elements = NULL; 2726 } 2727 2728 arglist.Pointer = arg; 2729 arglist.Count = 4; 2730 buf.Pointer = NULL; 2731 buf.Length = ACPI_ALLOCATE_BUFFER; 2732 status = AcpiEvaluateObjectTyped(handle, "_DSM", &arglist, &buf, type); 2733 if (ACPI_FAILURE(status)) 2734 return (status); 2735 2736 KASSERT(ACPI_SUCCESS(status), ("Unexpected status")); 2737 2738 *out_buf = buf; 2739 return (status); 2740 } 2741 2742 ACPI_STATUS 2743 acpi_EvaluateOSC(ACPI_HANDLE handle, uint8_t *uuid, int revision, int count, 2744 uint32_t *caps_in, uint32_t *caps_out, bool query) 2745 { 2746 ACPI_OBJECT arg[4], *ret; 2747 ACPI_OBJECT_LIST arglist; 2748 ACPI_BUFFER buf; 2749 ACPI_STATUS status; 2750 2751 arglist.Pointer = arg; 2752 arglist.Count = 4; 2753 arg[0].Type = ACPI_TYPE_BUFFER; 2754 arg[0].Buffer.Length = ACPI_UUID_LENGTH; 2755 arg[0].Buffer.Pointer = uuid; 2756 arg[1].Type = ACPI_TYPE_INTEGER; 2757 arg[1].Integer.Value = revision; 2758 arg[2].Type = ACPI_TYPE_INTEGER; 2759 arg[2].Integer.Value = count; 2760 arg[3].Type = ACPI_TYPE_BUFFER; 2761 arg[3].Buffer.Length = count * sizeof(*caps_in); 2762 arg[3].Buffer.Pointer = (uint8_t *)caps_in; 2763 caps_in[0] = query ? 1 : 0; 2764 buf.Pointer = NULL; 2765 buf.Length = ACPI_ALLOCATE_BUFFER; 2766 status = AcpiEvaluateObjectTyped(handle, "_OSC", &arglist, &buf, 2767 ACPI_TYPE_BUFFER); 2768 if (ACPI_FAILURE(status)) 2769 return (status); 2770 if (caps_out != NULL) { 2771 ret = buf.Pointer; 2772 if (ret->Buffer.Length != count * sizeof(*caps_out)) { 2773 AcpiOsFree(buf.Pointer); 2774 return (AE_BUFFER_OVERFLOW); 2775 } 2776 bcopy(ret->Buffer.Pointer, caps_out, ret->Buffer.Length); 2777 } 2778 AcpiOsFree(buf.Pointer); 2779 return (status); 2780 } 2781 2782 /* 2783 * Set interrupt model. 2784 */ 2785 ACPI_STATUS 2786 acpi_SetIntrModel(int model) 2787 { 2788 2789 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2790 } 2791 2792 /* 2793 * Walk subtables of a table and call a callback routine for each 2794 * subtable. The caller should provide the first subtable and a 2795 * pointer to the end of the table. This can be used to walk tables 2796 * such as MADT and SRAT that use subtable entries. 2797 */ 2798 void 2799 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler, 2800 void *arg) 2801 { 2802 ACPI_SUBTABLE_HEADER *entry; 2803 2804 for (entry = first; (void *)entry < end; ) { 2805 /* Avoid an infinite loop if we hit a bogus entry. */ 2806 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER)) 2807 return; 2808 2809 handler(entry, arg); 2810 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length); 2811 } 2812 } 2813 2814 /* 2815 * DEPRECATED. This interface has serious deficiencies and will be 2816 * removed. 2817 * 2818 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2819 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2820 */ 2821 ACPI_STATUS 2822 acpi_SetSleepState(struct acpi_softc *sc, int state) 2823 { 2824 static int once; 2825 2826 if (!once) { 2827 device_printf(sc->acpi_dev, 2828 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2829 once = 1; 2830 } 2831 return (acpi_EnterSleepState(sc, state)); 2832 } 2833 2834 #if defined(__amd64__) || defined(__i386__) 2835 static void 2836 acpi_sleep_force_task(void *context) 2837 { 2838 struct acpi_softc *sc = (struct acpi_softc *)context; 2839 2840 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2841 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2842 sc->acpi_next_sstate); 2843 } 2844 2845 static void 2846 acpi_sleep_force(void *arg) 2847 { 2848 struct acpi_softc *sc = (struct acpi_softc *)arg; 2849 2850 device_printf(sc->acpi_dev, 2851 "suspend request timed out, forcing sleep now\n"); 2852 /* 2853 * XXX Suspending from callout causes freezes in DEVICE_SUSPEND(). 2854 * Suspend from acpi_task thread instead. 2855 */ 2856 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 2857 acpi_sleep_force_task, sc))) 2858 device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n"); 2859 } 2860 #endif 2861 2862 /* 2863 * Request that the system enter the given suspend state. All /dev/apm 2864 * devices and devd(8) will be notified. Userland then has a chance to 2865 * save state and acknowledge the request. The system sleeps once all 2866 * acks are in. 2867 */ 2868 int 2869 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2870 { 2871 #if defined(__amd64__) || defined(__i386__) 2872 struct apm_clone_data *clone; 2873 ACPI_STATUS status; 2874 2875 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2876 return (EINVAL); 2877 if (!acpi_sleep_states[state]) 2878 return (EOPNOTSUPP); 2879 2880 /* 2881 * If a reboot/shutdown/suspend request is already in progress or 2882 * suspend is blocked due to an upcoming shutdown, just return. 2883 */ 2884 if (rebooting || sc->acpi_next_sstate != 0 || suspend_blocked) { 2885 return (0); 2886 } 2887 2888 /* Wait until sleep is enabled. */ 2889 while (sc->acpi_sleep_disabled) { 2890 AcpiOsSleep(1000); 2891 } 2892 2893 ACPI_LOCK(acpi); 2894 2895 sc->acpi_next_sstate = state; 2896 2897 /* S5 (soft-off) should be entered directly with no waiting. */ 2898 if (state == ACPI_STATE_S5) { 2899 ACPI_UNLOCK(acpi); 2900 status = acpi_EnterSleepState(sc, state); 2901 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2902 } 2903 2904 /* Record the pending state and notify all apm devices. */ 2905 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2906 clone->notify_status = APM_EV_NONE; 2907 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2908 selwakeuppri(&clone->sel_read, PZERO); 2909 KNOTE_LOCKED(&clone->sel_read.si_note, 0); 2910 } 2911 } 2912 2913 /* If devd(8) is not running, immediately enter the sleep state. */ 2914 if (!devctl_process_running()) { 2915 ACPI_UNLOCK(acpi); 2916 status = acpi_EnterSleepState(sc, state); 2917 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2918 } 2919 2920 /* 2921 * Set a timeout to fire if userland doesn't ack the suspend request 2922 * in time. This way we still eventually go to sleep if we were 2923 * overheating or running low on battery, even if userland is hung. 2924 * We cancel this timeout once all userland acks are in or the 2925 * suspend request is aborted. 2926 */ 2927 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2928 ACPI_UNLOCK(acpi); 2929 2930 /* Now notify devd(8) also. */ 2931 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2932 2933 return (0); 2934 #else 2935 /* This platform does not support acpi suspend/resume. */ 2936 return (EOPNOTSUPP); 2937 #endif 2938 } 2939 2940 /* 2941 * Acknowledge (or reject) a pending sleep state. The caller has 2942 * prepared for suspend and is now ready for it to proceed. If the 2943 * error argument is non-zero, it indicates suspend should be cancelled 2944 * and gives an errno value describing why. Once all votes are in, 2945 * we suspend the system. 2946 */ 2947 int 2948 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2949 { 2950 #if defined(__amd64__) || defined(__i386__) 2951 struct acpi_softc *sc; 2952 int ret, sleeping; 2953 2954 /* If no pending sleep state, return an error. */ 2955 ACPI_LOCK(acpi); 2956 sc = clone->acpi_sc; 2957 if (sc->acpi_next_sstate == 0) { 2958 ACPI_UNLOCK(acpi); 2959 return (ENXIO); 2960 } 2961 2962 /* Caller wants to abort suspend process. */ 2963 if (error) { 2964 sc->acpi_next_sstate = 0; 2965 callout_stop(&sc->susp_force_to); 2966 device_printf(sc->acpi_dev, 2967 "listener on %s cancelled the pending suspend\n", 2968 devtoname(clone->cdev)); 2969 ACPI_UNLOCK(acpi); 2970 return (0); 2971 } 2972 2973 /* 2974 * Mark this device as acking the suspend request. Then, walk through 2975 * all devices, seeing if they agree yet. We only count devices that 2976 * are writable since read-only devices couldn't ack the request. 2977 */ 2978 sleeping = TRUE; 2979 clone->notify_status = APM_EV_ACKED; 2980 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2981 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2982 clone->notify_status != APM_EV_ACKED) { 2983 sleeping = FALSE; 2984 break; 2985 } 2986 } 2987 2988 /* If all devices have voted "yes", we will suspend now. */ 2989 if (sleeping) 2990 callout_stop(&sc->susp_force_to); 2991 ACPI_UNLOCK(acpi); 2992 ret = 0; 2993 if (sleeping) { 2994 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2995 ret = ENODEV; 2996 } 2997 return (ret); 2998 #else 2999 /* This platform does not support acpi suspend/resume. */ 3000 return (EOPNOTSUPP); 3001 #endif 3002 } 3003 3004 static void 3005 acpi_sleep_enable(void *arg) 3006 { 3007 struct acpi_softc *sc = (struct acpi_softc *)arg; 3008 3009 ACPI_LOCK_ASSERT(acpi); 3010 3011 /* Reschedule if the system is not fully up and running. */ 3012 if (!AcpiGbl_SystemAwakeAndRunning) { 3013 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME); 3014 return; 3015 } 3016 3017 sc->acpi_sleep_disabled = FALSE; 3018 } 3019 3020 static ACPI_STATUS 3021 acpi_sleep_disable(struct acpi_softc *sc) 3022 { 3023 ACPI_STATUS status; 3024 3025 /* Fail if the system is not fully up and running. */ 3026 if (!AcpiGbl_SystemAwakeAndRunning) 3027 return (AE_ERROR); 3028 3029 ACPI_LOCK(acpi); 3030 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 3031 sc->acpi_sleep_disabled = TRUE; 3032 ACPI_UNLOCK(acpi); 3033 3034 return (status); 3035 } 3036 3037 enum acpi_sleep_state { 3038 ACPI_SS_NONE, 3039 ACPI_SS_GPE_SET, 3040 ACPI_SS_DEV_SUSPEND, 3041 ACPI_SS_SLP_PREP, 3042 ACPI_SS_SLEPT, 3043 }; 3044 3045 /* 3046 * Enter the desired system sleep state. 3047 * 3048 * Currently we support S1-S5 but S4 is only S4BIOS 3049 */ 3050 static ACPI_STATUS 3051 acpi_EnterSleepState(struct acpi_softc *sc, int state) 3052 { 3053 register_t intr; 3054 ACPI_STATUS status; 3055 ACPI_EVENT_STATUS power_button_status; 3056 enum acpi_sleep_state slp_state; 3057 int sleep_result; 3058 3059 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3060 3061 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 3062 return_ACPI_STATUS (AE_BAD_PARAMETER); 3063 if (!acpi_sleep_states[state]) { 3064 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", 3065 state); 3066 return (AE_SUPPORT); 3067 } 3068 3069 /* Re-entry once we're suspending is not allowed. */ 3070 status = acpi_sleep_disable(sc); 3071 if (ACPI_FAILURE(status)) { 3072 device_printf(sc->acpi_dev, 3073 "suspend request ignored (not ready yet)\n"); 3074 return (status); 3075 } 3076 3077 if (state == ACPI_STATE_S5) { 3078 /* 3079 * Shut down cleanly and power off. This will call us back through the 3080 * shutdown handlers. 3081 */ 3082 shutdown_nice(RB_POWEROFF); 3083 return_ACPI_STATUS (AE_OK); 3084 } 3085 3086 EVENTHANDLER_INVOKE(power_suspend_early); 3087 stop_all_proc(); 3088 suspend_all_fs(); 3089 EVENTHANDLER_INVOKE(power_suspend); 3090 3091 #ifdef EARLY_AP_STARTUP 3092 MPASS(mp_ncpus == 1 || smp_started); 3093 thread_lock(curthread); 3094 sched_bind(curthread, 0); 3095 thread_unlock(curthread); 3096 #else 3097 if (smp_started) { 3098 thread_lock(curthread); 3099 sched_bind(curthread, 0); 3100 thread_unlock(curthread); 3101 } 3102 #endif 3103 3104 /* 3105 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 3106 * drivers need this. 3107 */ 3108 mtx_lock(&Giant); 3109 3110 slp_state = ACPI_SS_NONE; 3111 3112 sc->acpi_sstate = state; 3113 3114 /* Enable any GPEs as appropriate and requested by the user. */ 3115 acpi_wake_prep_walk(state); 3116 slp_state = ACPI_SS_GPE_SET; 3117 3118 /* 3119 * Inform all devices that we are going to sleep. If at least one 3120 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 3121 * 3122 * XXX Note that a better two-pass approach with a 'veto' pass 3123 * followed by a "real thing" pass would be better, but the current 3124 * bus interface does not provide for this. 3125 */ 3126 if (DEVICE_SUSPEND(root_bus) != 0) { 3127 device_printf(sc->acpi_dev, "device_suspend failed\n"); 3128 goto backout; 3129 } 3130 slp_state = ACPI_SS_DEV_SUSPEND; 3131 3132 status = AcpiEnterSleepStatePrep(state); 3133 if (ACPI_FAILURE(status)) { 3134 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 3135 AcpiFormatException(status)); 3136 goto backout; 3137 } 3138 slp_state = ACPI_SS_SLP_PREP; 3139 3140 if (sc->acpi_sleep_delay > 0) 3141 DELAY(sc->acpi_sleep_delay * 1000000); 3142 3143 suspendclock(); 3144 intr = intr_disable(); 3145 if (state != ACPI_STATE_S1) { 3146 sleep_result = acpi_sleep_machdep(sc, state); 3147 acpi_wakeup_machdep(sc, state, sleep_result, 0); 3148 3149 /* 3150 * XXX According to ACPI specification SCI_EN bit should be restored 3151 * by ACPI platform (BIOS, firmware) to its pre-sleep state. 3152 * Unfortunately some BIOSes fail to do that and that leads to 3153 * unexpected and serious consequences during wake up like a system 3154 * getting stuck in SMI handlers. 3155 * This hack is picked up from Linux, which claims that it follows 3156 * Windows behavior. 3157 */ 3158 if (sleep_result == 1 && state != ACPI_STATE_S4) 3159 AcpiWriteBitRegister(ACPI_BITREG_SCI_ENABLE, ACPI_ENABLE_EVENT); 3160 3161 if (sleep_result == 1 && state == ACPI_STATE_S3) { 3162 /* 3163 * Prevent mis-interpretation of the wakeup by power button 3164 * as a request for power off. 3165 * Ideally we should post an appropriate wakeup event, 3166 * perhaps using acpi_event_power_button_wake or alike. 3167 * 3168 * Clearing of power button status after wakeup is mandated 3169 * by ACPI specification in section "Fixed Power Button". 3170 * 3171 * XXX As of ACPICA 20121114 AcpiGetEventStatus provides 3172 * status as 0/1 corressponding to inactive/active despite 3173 * its type being ACPI_EVENT_STATUS. In other words, 3174 * we should not test for ACPI_EVENT_FLAG_SET for time being. 3175 */ 3176 if (ACPI_SUCCESS(AcpiGetEventStatus(ACPI_EVENT_POWER_BUTTON, 3177 &power_button_status)) && power_button_status != 0) { 3178 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 3179 device_printf(sc->acpi_dev, 3180 "cleared fixed power button status\n"); 3181 } 3182 } 3183 3184 intr_restore(intr); 3185 3186 /* call acpi_wakeup_machdep() again with interrupt enabled */ 3187 acpi_wakeup_machdep(sc, state, sleep_result, 1); 3188 3189 AcpiLeaveSleepStatePrep(state); 3190 3191 if (sleep_result == -1) 3192 goto backout; 3193 3194 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 3195 if (state == ACPI_STATE_S4) 3196 AcpiEnable(); 3197 } else { 3198 status = AcpiEnterSleepState(state); 3199 intr_restore(intr); 3200 AcpiLeaveSleepStatePrep(state); 3201 if (ACPI_FAILURE(status)) { 3202 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 3203 AcpiFormatException(status)); 3204 goto backout; 3205 } 3206 } 3207 slp_state = ACPI_SS_SLEPT; 3208 3209 /* 3210 * Back out state according to how far along we got in the suspend 3211 * process. This handles both the error and success cases. 3212 */ 3213 backout: 3214 if (slp_state >= ACPI_SS_SLP_PREP) 3215 resumeclock(); 3216 if (slp_state >= ACPI_SS_GPE_SET) { 3217 acpi_wake_prep_walk(state); 3218 sc->acpi_sstate = ACPI_STATE_S0; 3219 } 3220 if (slp_state >= ACPI_SS_DEV_SUSPEND) 3221 DEVICE_RESUME(root_bus); 3222 if (slp_state >= ACPI_SS_SLP_PREP) 3223 AcpiLeaveSleepState(state); 3224 if (slp_state >= ACPI_SS_SLEPT) { 3225 #if defined(__i386__) || defined(__amd64__) 3226 /* NB: we are still using ACPI timecounter at this point. */ 3227 resume_TSC(); 3228 #endif 3229 acpi_resync_clock(sc); 3230 acpi_enable_fixed_events(sc); 3231 } 3232 sc->acpi_next_sstate = 0; 3233 3234 mtx_unlock(&Giant); 3235 3236 #ifdef EARLY_AP_STARTUP 3237 thread_lock(curthread); 3238 sched_unbind(curthread); 3239 thread_unlock(curthread); 3240 #else 3241 if (smp_started) { 3242 thread_lock(curthread); 3243 sched_unbind(curthread); 3244 thread_unlock(curthread); 3245 } 3246 #endif 3247 3248 resume_all_fs(); 3249 resume_all_proc(); 3250 3251 EVENTHANDLER_INVOKE(power_resume); 3252 3253 /* Allow another sleep request after a while. */ 3254 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME); 3255 3256 /* Run /etc/rc.resume after we are back. */ 3257 if (devctl_process_running()) 3258 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 3259 3260 return_ACPI_STATUS (status); 3261 } 3262 3263 static void 3264 acpi_resync_clock(struct acpi_softc *sc) 3265 { 3266 3267 /* 3268 * Warm up timecounter again and reset system clock. 3269 */ 3270 (void)timecounter->tc_get_timecount(timecounter); 3271 inittodr(time_second + sc->acpi_sleep_delay); 3272 } 3273 3274 /* Enable or disable the device's wake GPE. */ 3275 int 3276 acpi_wake_set_enable(device_t dev, int enable) 3277 { 3278 struct acpi_prw_data prw; 3279 ACPI_STATUS status; 3280 int flags; 3281 3282 /* Make sure the device supports waking the system and get the GPE. */ 3283 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 3284 return (ENXIO); 3285 3286 flags = acpi_get_flags(dev); 3287 if (enable) { 3288 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 3289 ACPI_GPE_ENABLE); 3290 if (ACPI_FAILURE(status)) { 3291 device_printf(dev, "enable wake failed\n"); 3292 return (ENXIO); 3293 } 3294 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 3295 } else { 3296 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 3297 ACPI_GPE_DISABLE); 3298 if (ACPI_FAILURE(status)) { 3299 device_printf(dev, "disable wake failed\n"); 3300 return (ENXIO); 3301 } 3302 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 3303 } 3304 3305 return (0); 3306 } 3307 3308 static int 3309 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 3310 { 3311 struct acpi_prw_data prw; 3312 device_t dev; 3313 3314 /* Check that this is a wake-capable device and get its GPE. */ 3315 if (acpi_parse_prw(handle, &prw) != 0) 3316 return (ENXIO); 3317 dev = acpi_get_device(handle); 3318 3319 /* 3320 * The destination sleep state must be less than (i.e., higher power) 3321 * or equal to the value specified by _PRW. If this GPE cannot be 3322 * enabled for the next sleep state, then disable it. If it can and 3323 * the user requested it be enabled, turn on any required power resources 3324 * and set _PSW. 3325 */ 3326 if (sstate > prw.lowest_wake) { 3327 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 3328 if (bootverbose) 3329 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 3330 acpi_name(handle), sstate); 3331 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 3332 acpi_pwr_wake_enable(handle, 1); 3333 acpi_SetInteger(handle, "_PSW", 1); 3334 if (bootverbose) 3335 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 3336 acpi_name(handle), sstate); 3337 } 3338 3339 return (0); 3340 } 3341 3342 static int 3343 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 3344 { 3345 struct acpi_prw_data prw; 3346 device_t dev; 3347 3348 /* 3349 * Check that this is a wake-capable device and get its GPE. Return 3350 * now if the user didn't enable this device for wake. 3351 */ 3352 if (acpi_parse_prw(handle, &prw) != 0) 3353 return (ENXIO); 3354 dev = acpi_get_device(handle); 3355 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 3356 return (0); 3357 3358 /* 3359 * If this GPE couldn't be enabled for the previous sleep state, it was 3360 * disabled before going to sleep so re-enable it. If it was enabled, 3361 * clear _PSW and turn off any power resources it used. 3362 */ 3363 if (sstate > prw.lowest_wake) { 3364 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 3365 if (bootverbose) 3366 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 3367 } else { 3368 acpi_SetInteger(handle, "_PSW", 0); 3369 acpi_pwr_wake_enable(handle, 0); 3370 if (bootverbose) 3371 device_printf(dev, "run_prep cleaned up for %s\n", 3372 acpi_name(handle)); 3373 } 3374 3375 return (0); 3376 } 3377 3378 static ACPI_STATUS 3379 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 3380 { 3381 int sstate; 3382 3383 /* If suspending, run the sleep prep function, otherwise wake. */ 3384 sstate = *(int *)context; 3385 if (AcpiGbl_SystemAwakeAndRunning) 3386 acpi_wake_sleep_prep(handle, sstate); 3387 else 3388 acpi_wake_run_prep(handle, sstate); 3389 return (AE_OK); 3390 } 3391 3392 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 3393 static int 3394 acpi_wake_prep_walk(int sstate) 3395 { 3396 ACPI_HANDLE sb_handle; 3397 3398 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 3399 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 3400 acpi_wake_prep, NULL, &sstate, NULL); 3401 return (0); 3402 } 3403 3404 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 3405 static int 3406 acpi_wake_sysctl_walk(device_t dev) 3407 { 3408 int error, i, numdevs; 3409 device_t *devlist; 3410 device_t child; 3411 ACPI_STATUS status; 3412 3413 error = device_get_children(dev, &devlist, &numdevs); 3414 if (error != 0 || numdevs == 0) { 3415 if (numdevs == 0) 3416 free(devlist, M_TEMP); 3417 return (error); 3418 } 3419 for (i = 0; i < numdevs; i++) { 3420 child = devlist[i]; 3421 acpi_wake_sysctl_walk(child); 3422 if (!device_is_attached(child)) 3423 continue; 3424 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 3425 if (ACPI_SUCCESS(status)) { 3426 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 3427 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 3428 "wake", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, child, 0, 3429 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 3430 } 3431 } 3432 free(devlist, M_TEMP); 3433 3434 return (0); 3435 } 3436 3437 /* Enable or disable wake from userland. */ 3438 static int 3439 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 3440 { 3441 int enable, error; 3442 device_t dev; 3443 3444 dev = (device_t)arg1; 3445 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 3446 3447 error = sysctl_handle_int(oidp, &enable, 0, req); 3448 if (error != 0 || req->newptr == NULL) 3449 return (error); 3450 if (enable != 0 && enable != 1) 3451 return (EINVAL); 3452 3453 return (acpi_wake_set_enable(dev, enable)); 3454 } 3455 3456 /* Parse a device's _PRW into a structure. */ 3457 int 3458 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 3459 { 3460 ACPI_STATUS status; 3461 ACPI_BUFFER prw_buffer; 3462 ACPI_OBJECT *res, *res2; 3463 int error, i, power_count; 3464 3465 if (h == NULL || prw == NULL) 3466 return (EINVAL); 3467 3468 /* 3469 * The _PRW object (7.2.9) is only required for devices that have the 3470 * ability to wake the system from a sleeping state. 3471 */ 3472 error = EINVAL; 3473 prw_buffer.Pointer = NULL; 3474 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 3475 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 3476 if (ACPI_FAILURE(status)) 3477 return (ENOENT); 3478 res = (ACPI_OBJECT *)prw_buffer.Pointer; 3479 if (res == NULL) 3480 return (ENOENT); 3481 if (!ACPI_PKG_VALID(res, 2)) 3482 goto out; 3483 3484 /* 3485 * Element 1 of the _PRW object: 3486 * The lowest power system sleeping state that can be entered while still 3487 * providing wake functionality. The sleeping state being entered must 3488 * be less than (i.e., higher power) or equal to this value. 3489 */ 3490 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 3491 goto out; 3492 3493 /* 3494 * Element 0 of the _PRW object: 3495 */ 3496 switch (res->Package.Elements[0].Type) { 3497 case ACPI_TYPE_INTEGER: 3498 /* 3499 * If the data type of this package element is numeric, then this 3500 * _PRW package element is the bit index in the GPEx_EN, in the 3501 * GPE blocks described in the FADT, of the enable bit that is 3502 * enabled for the wake event. 3503 */ 3504 prw->gpe_handle = NULL; 3505 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 3506 error = 0; 3507 break; 3508 case ACPI_TYPE_PACKAGE: 3509 /* 3510 * If the data type of this package element is a package, then this 3511 * _PRW package element is itself a package containing two 3512 * elements. The first is an object reference to the GPE Block 3513 * device that contains the GPE that will be triggered by the wake 3514 * event. The second element is numeric and it contains the bit 3515 * index in the GPEx_EN, in the GPE Block referenced by the 3516 * first element in the package, of the enable bit that is enabled for 3517 * the wake event. 3518 * 3519 * For example, if this field is a package then it is of the form: 3520 * Package() {\_SB.PCI0.ISA.GPE, 2} 3521 */ 3522 res2 = &res->Package.Elements[0]; 3523 if (!ACPI_PKG_VALID(res2, 2)) 3524 goto out; 3525 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 3526 if (prw->gpe_handle == NULL) 3527 goto out; 3528 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 3529 goto out; 3530 error = 0; 3531 break; 3532 default: 3533 goto out; 3534 } 3535 3536 /* Elements 2 to N of the _PRW object are power resources. */ 3537 power_count = res->Package.Count - 2; 3538 if (power_count > ACPI_PRW_MAX_POWERRES) { 3539 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 3540 power_count = 0; 3541 } 3542 prw->power_res_count = power_count; 3543 for (i = 0; i < power_count; i++) 3544 prw->power_res[i] = res->Package.Elements[i]; 3545 3546 out: 3547 if (prw_buffer.Pointer != NULL) 3548 AcpiOsFree(prw_buffer.Pointer); 3549 return (error); 3550 } 3551 3552 /* 3553 * ACPI Event Handlers 3554 */ 3555 3556 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 3557 3558 static void 3559 acpi_system_eventhandler_sleep(void *arg, int state) 3560 { 3561 struct acpi_softc *sc = (struct acpi_softc *)arg; 3562 int ret; 3563 3564 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3565 3566 /* Check if button action is disabled or unknown. */ 3567 if (state == ACPI_STATE_UNKNOWN) 3568 return; 3569 3570 /* Request that the system prepare to enter the given suspend state. */ 3571 ret = acpi_ReqSleepState(sc, state); 3572 if (ret != 0) 3573 device_printf(sc->acpi_dev, 3574 "request to enter state S%d failed (err %d)\n", state, ret); 3575 3576 return_VOID; 3577 } 3578 3579 static void 3580 acpi_system_eventhandler_wakeup(void *arg, int state) 3581 { 3582 3583 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3584 3585 /* Currently, nothing to do for wakeup. */ 3586 3587 return_VOID; 3588 } 3589 3590 /* 3591 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 3592 */ 3593 static void 3594 acpi_invoke_sleep_eventhandler(void *context) 3595 { 3596 3597 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context); 3598 } 3599 3600 static void 3601 acpi_invoke_wake_eventhandler(void *context) 3602 { 3603 3604 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context); 3605 } 3606 3607 UINT32 3608 acpi_event_power_button_sleep(void *context) 3609 { 3610 struct acpi_softc *sc = (struct acpi_softc *)context; 3611 3612 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3613 3614 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3615 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx))) 3616 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3617 return_VALUE (ACPI_INTERRUPT_HANDLED); 3618 } 3619 3620 UINT32 3621 acpi_event_power_button_wake(void *context) 3622 { 3623 struct acpi_softc *sc = (struct acpi_softc *)context; 3624 3625 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3626 3627 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3628 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx))) 3629 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3630 return_VALUE (ACPI_INTERRUPT_HANDLED); 3631 } 3632 3633 UINT32 3634 acpi_event_sleep_button_sleep(void *context) 3635 { 3636 struct acpi_softc *sc = (struct acpi_softc *)context; 3637 3638 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3639 3640 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3641 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx))) 3642 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3643 return_VALUE (ACPI_INTERRUPT_HANDLED); 3644 } 3645 3646 UINT32 3647 acpi_event_sleep_button_wake(void *context) 3648 { 3649 struct acpi_softc *sc = (struct acpi_softc *)context; 3650 3651 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3652 3653 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3654 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx))) 3655 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3656 return_VALUE (ACPI_INTERRUPT_HANDLED); 3657 } 3658 3659 /* 3660 * XXX This static buffer is suboptimal. There is no locking so only 3661 * use this for single-threaded callers. 3662 */ 3663 char * 3664 acpi_name(ACPI_HANDLE handle) 3665 { 3666 ACPI_BUFFER buf; 3667 static char data[256]; 3668 3669 buf.Length = sizeof(data); 3670 buf.Pointer = data; 3671 3672 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3673 return (data); 3674 return ("(unknown)"); 3675 } 3676 3677 /* 3678 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3679 * parts of the namespace. 3680 */ 3681 int 3682 acpi_avoid(ACPI_HANDLE handle) 3683 { 3684 char *cp, *env, *np; 3685 int len; 3686 3687 np = acpi_name(handle); 3688 if (*np == '\\') 3689 np++; 3690 if ((env = kern_getenv("debug.acpi.avoid")) == NULL) 3691 return (0); 3692 3693 /* Scan the avoid list checking for a match */ 3694 cp = env; 3695 for (;;) { 3696 while (*cp != 0 && isspace(*cp)) 3697 cp++; 3698 if (*cp == 0) 3699 break; 3700 len = 0; 3701 while (cp[len] != 0 && !isspace(cp[len])) 3702 len++; 3703 if (!strncmp(cp, np, len)) { 3704 freeenv(env); 3705 return(1); 3706 } 3707 cp += len; 3708 } 3709 freeenv(env); 3710 3711 return (0); 3712 } 3713 3714 /* 3715 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3716 */ 3717 int 3718 acpi_disabled(char *subsys) 3719 { 3720 char *cp, *env; 3721 int len; 3722 3723 if ((env = kern_getenv("debug.acpi.disabled")) == NULL) 3724 return (0); 3725 if (strcmp(env, "all") == 0) { 3726 freeenv(env); 3727 return (1); 3728 } 3729 3730 /* Scan the disable list, checking for a match. */ 3731 cp = env; 3732 for (;;) { 3733 while (*cp != '\0' && isspace(*cp)) 3734 cp++; 3735 if (*cp == '\0') 3736 break; 3737 len = 0; 3738 while (cp[len] != '\0' && !isspace(cp[len])) 3739 len++; 3740 if (strncmp(cp, subsys, len) == 0) { 3741 freeenv(env); 3742 return (1); 3743 } 3744 cp += len; 3745 } 3746 freeenv(env); 3747 3748 return (0); 3749 } 3750 3751 static void 3752 acpi_lookup(void *arg, const char *name, device_t *dev) 3753 { 3754 ACPI_HANDLE handle; 3755 3756 if (*dev != NULL) 3757 return; 3758 3759 /* 3760 * Allow any handle name that is specified as an absolute path and 3761 * starts with '\'. We could restrict this to \_SB and friends, 3762 * but see acpi_probe_children() for notes on why we scan the entire 3763 * namespace for devices. 3764 * 3765 * XXX: The pathname argument to AcpiGetHandle() should be fixed to 3766 * be const. 3767 */ 3768 if (name[0] != '\\') 3769 return; 3770 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, __DECONST(char *, name), 3771 &handle))) 3772 return; 3773 *dev = acpi_get_device(handle); 3774 } 3775 3776 /* 3777 * Control interface. 3778 * 3779 * We multiplex ioctls for all participating ACPI devices here. Individual 3780 * drivers wanting to be accessible via /dev/acpi should use the 3781 * register/deregister interface to make their handlers visible. 3782 */ 3783 struct acpi_ioctl_hook 3784 { 3785 TAILQ_ENTRY(acpi_ioctl_hook) link; 3786 u_long cmd; 3787 acpi_ioctl_fn fn; 3788 void *arg; 3789 }; 3790 3791 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3792 static int acpi_ioctl_hooks_initted; 3793 3794 int 3795 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3796 { 3797 struct acpi_ioctl_hook *hp; 3798 3799 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3800 return (ENOMEM); 3801 hp->cmd = cmd; 3802 hp->fn = fn; 3803 hp->arg = arg; 3804 3805 ACPI_LOCK(acpi); 3806 if (acpi_ioctl_hooks_initted == 0) { 3807 TAILQ_INIT(&acpi_ioctl_hooks); 3808 acpi_ioctl_hooks_initted = 1; 3809 } 3810 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3811 ACPI_UNLOCK(acpi); 3812 3813 return (0); 3814 } 3815 3816 void 3817 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3818 { 3819 struct acpi_ioctl_hook *hp; 3820 3821 ACPI_LOCK(acpi); 3822 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3823 if (hp->cmd == cmd && hp->fn == fn) 3824 break; 3825 3826 if (hp != NULL) { 3827 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3828 free(hp, M_ACPIDEV); 3829 } 3830 ACPI_UNLOCK(acpi); 3831 } 3832 3833 static int 3834 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) 3835 { 3836 return (0); 3837 } 3838 3839 static int 3840 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) 3841 { 3842 return (0); 3843 } 3844 3845 static int 3846 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 3847 { 3848 struct acpi_softc *sc; 3849 struct acpi_ioctl_hook *hp; 3850 int error, state; 3851 3852 error = 0; 3853 hp = NULL; 3854 sc = dev->si_drv1; 3855 3856 /* 3857 * Scan the list of registered ioctls, looking for handlers. 3858 */ 3859 ACPI_LOCK(acpi); 3860 if (acpi_ioctl_hooks_initted) 3861 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3862 if (hp->cmd == cmd) 3863 break; 3864 } 3865 ACPI_UNLOCK(acpi); 3866 if (hp) 3867 return (hp->fn(cmd, addr, hp->arg)); 3868 3869 /* 3870 * Core ioctls are not permitted for non-writable user. 3871 * Currently, other ioctls just fetch information. 3872 * Not changing system behavior. 3873 */ 3874 if ((flag & FWRITE) == 0) 3875 return (EPERM); 3876 3877 /* Core system ioctls. */ 3878 switch (cmd) { 3879 case ACPIIO_REQSLPSTATE: 3880 state = *(int *)addr; 3881 if (state != ACPI_STATE_S5) 3882 return (acpi_ReqSleepState(sc, state)); 3883 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); 3884 error = EOPNOTSUPP; 3885 break; 3886 case ACPIIO_ACKSLPSTATE: 3887 error = *(int *)addr; 3888 error = acpi_AckSleepState(sc->acpi_clone, error); 3889 break; 3890 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3891 state = *(int *)addr; 3892 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) 3893 return (EINVAL); 3894 if (!acpi_sleep_states[state]) 3895 return (EOPNOTSUPP); 3896 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 3897 error = ENXIO; 3898 break; 3899 default: 3900 error = ENXIO; 3901 break; 3902 } 3903 3904 return (error); 3905 } 3906 3907 static int 3908 acpi_sname2sstate(const char *sname) 3909 { 3910 int sstate; 3911 3912 if (toupper(sname[0]) == 'S') { 3913 sstate = sname[1] - '0'; 3914 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && 3915 sname[2] == '\0') 3916 return (sstate); 3917 } else if (strcasecmp(sname, "NONE") == 0) 3918 return (ACPI_STATE_UNKNOWN); 3919 return (-1); 3920 } 3921 3922 static const char * 3923 acpi_sstate2sname(int sstate) 3924 { 3925 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; 3926 3927 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) 3928 return (snames[sstate]); 3929 else if (sstate == ACPI_STATE_UNKNOWN) 3930 return ("NONE"); 3931 return (NULL); 3932 } 3933 3934 static int 3935 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3936 { 3937 int error; 3938 struct sbuf sb; 3939 UINT8 state; 3940 3941 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3942 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 3943 if (acpi_sleep_states[state]) 3944 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); 3945 sbuf_trim(&sb); 3946 sbuf_finish(&sb); 3947 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3948 sbuf_delete(&sb); 3949 return (error); 3950 } 3951 3952 static int 3953 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3954 { 3955 char sleep_state[10]; 3956 int error, new_state, old_state; 3957 3958 old_state = *(int *)oidp->oid_arg1; 3959 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); 3960 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3961 if (error == 0 && req->newptr != NULL) { 3962 new_state = acpi_sname2sstate(sleep_state); 3963 if (new_state < ACPI_STATE_S1) 3964 return (EINVAL); 3965 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) 3966 return (EOPNOTSUPP); 3967 if (new_state != old_state) 3968 *(int *)oidp->oid_arg1 = new_state; 3969 } 3970 return (error); 3971 } 3972 3973 /* Inform devctl(4) when we receive a Notify. */ 3974 void 3975 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3976 { 3977 char notify_buf[16]; 3978 ACPI_BUFFER handle_buf; 3979 ACPI_STATUS status; 3980 3981 if (subsystem == NULL) 3982 return; 3983 3984 handle_buf.Pointer = NULL; 3985 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3986 status = AcpiNsHandleToPathname(h, &handle_buf, FALSE); 3987 if (ACPI_FAILURE(status)) 3988 return; 3989 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3990 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3991 AcpiOsFree(handle_buf.Pointer); 3992 } 3993 3994 #ifdef ACPI_DEBUG 3995 /* 3996 * Support for parsing debug options from the kernel environment. 3997 * 3998 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3999 * by specifying the names of the bits in the debug.acpi.layer and 4000 * debug.acpi.level environment variables. Bits may be unset by 4001 * prefixing the bit name with !. 4002 */ 4003 struct debugtag 4004 { 4005 char *name; 4006 UINT32 value; 4007 }; 4008 4009 static struct debugtag dbg_layer[] = { 4010 {"ACPI_UTILITIES", ACPI_UTILITIES}, 4011 {"ACPI_HARDWARE", ACPI_HARDWARE}, 4012 {"ACPI_EVENTS", ACPI_EVENTS}, 4013 {"ACPI_TABLES", ACPI_TABLES}, 4014 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 4015 {"ACPI_PARSER", ACPI_PARSER}, 4016 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 4017 {"ACPI_EXECUTER", ACPI_EXECUTER}, 4018 {"ACPI_RESOURCES", ACPI_RESOURCES}, 4019 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 4020 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 4021 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 4022 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 4023 4024 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 4025 {"ACPI_BATTERY", ACPI_BATTERY}, 4026 {"ACPI_BUS", ACPI_BUS}, 4027 {"ACPI_BUTTON", ACPI_BUTTON}, 4028 {"ACPI_EC", ACPI_EC}, 4029 {"ACPI_FAN", ACPI_FAN}, 4030 {"ACPI_POWERRES", ACPI_POWERRES}, 4031 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 4032 {"ACPI_THERMAL", ACPI_THERMAL}, 4033 {"ACPI_TIMER", ACPI_TIMER}, 4034 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 4035 {NULL, 0} 4036 }; 4037 4038 static struct debugtag dbg_level[] = { 4039 {"ACPI_LV_INIT", ACPI_LV_INIT}, 4040 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 4041 {"ACPI_LV_INFO", ACPI_LV_INFO}, 4042 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 4043 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 4044 4045 /* Trace verbosity level 1 [Standard Trace Level] */ 4046 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 4047 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 4048 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 4049 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 4050 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 4051 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 4052 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 4053 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 4054 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 4055 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 4056 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 4057 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 4058 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 4059 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 4060 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 4061 4062 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 4063 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 4064 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 4065 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 4066 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 4067 {"ACPI_LV_ALL", ACPI_LV_ALL}, 4068 4069 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 4070 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 4071 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 4072 {"ACPI_LV_IO", ACPI_LV_IO}, 4073 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 4074 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 4075 4076 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 4077 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 4078 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 4079 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 4080 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 4081 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 4082 {NULL, 0} 4083 }; 4084 4085 static void 4086 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 4087 { 4088 char *ep; 4089 int i, l; 4090 int set; 4091 4092 while (*cp) { 4093 if (isspace(*cp)) { 4094 cp++; 4095 continue; 4096 } 4097 ep = cp; 4098 while (*ep && !isspace(*ep)) 4099 ep++; 4100 if (*cp == '!') { 4101 set = 0; 4102 cp++; 4103 if (cp == ep) 4104 continue; 4105 } else { 4106 set = 1; 4107 } 4108 l = ep - cp; 4109 for (i = 0; tag[i].name != NULL; i++) { 4110 if (!strncmp(cp, tag[i].name, l)) { 4111 if (set) 4112 *flag |= tag[i].value; 4113 else 4114 *flag &= ~tag[i].value; 4115 } 4116 } 4117 cp = ep; 4118 } 4119 } 4120 4121 static void 4122 acpi_set_debugging(void *junk) 4123 { 4124 char *layer, *level; 4125 4126 if (cold) { 4127 AcpiDbgLayer = 0; 4128 AcpiDbgLevel = 0; 4129 } 4130 4131 layer = kern_getenv("debug.acpi.layer"); 4132 level = kern_getenv("debug.acpi.level"); 4133 if (layer == NULL && level == NULL) 4134 return; 4135 4136 printf("ACPI set debug"); 4137 if (layer != NULL) { 4138 if (strcmp("NONE", layer) != 0) 4139 printf(" layer '%s'", layer); 4140 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 4141 freeenv(layer); 4142 } 4143 if (level != NULL) { 4144 if (strcmp("NONE", level) != 0) 4145 printf(" level '%s'", level); 4146 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 4147 freeenv(level); 4148 } 4149 printf("\n"); 4150 } 4151 4152 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 4153 NULL); 4154 4155 static int 4156 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 4157 { 4158 int error, *dbg; 4159 struct debugtag *tag; 4160 struct sbuf sb; 4161 char temp[128]; 4162 4163 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 4164 return (ENOMEM); 4165 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 4166 tag = &dbg_layer[0]; 4167 dbg = &AcpiDbgLayer; 4168 } else { 4169 tag = &dbg_level[0]; 4170 dbg = &AcpiDbgLevel; 4171 } 4172 4173 /* Get old values if this is a get request. */ 4174 ACPI_SERIAL_BEGIN(acpi); 4175 if (*dbg == 0) { 4176 sbuf_cpy(&sb, "NONE"); 4177 } else if (req->newptr == NULL) { 4178 for (; tag->name != NULL; tag++) { 4179 if ((*dbg & tag->value) == tag->value) 4180 sbuf_printf(&sb, "%s ", tag->name); 4181 } 4182 } 4183 sbuf_trim(&sb); 4184 sbuf_finish(&sb); 4185 strlcpy(temp, sbuf_data(&sb), sizeof(temp)); 4186 sbuf_delete(&sb); 4187 4188 error = sysctl_handle_string(oidp, temp, sizeof(temp), req); 4189 4190 /* Check for error or no change */ 4191 if (error == 0 && req->newptr != NULL) { 4192 *dbg = 0; 4193 kern_setenv((char *)oidp->oid_arg1, temp); 4194 acpi_set_debugging(NULL); 4195 } 4196 ACPI_SERIAL_END(acpi); 4197 4198 return (error); 4199 } 4200 4201 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, 4202 CTLFLAG_RW | CTLTYPE_STRING | CTLFLAG_NEEDGIANT, "debug.acpi.layer", 0, 4203 acpi_debug_sysctl, "A", 4204 ""); 4205 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, 4206 CTLFLAG_RW | CTLTYPE_STRING | CTLFLAG_NEEDGIANT, "debug.acpi.level", 0, 4207 acpi_debug_sysctl, "A", 4208 ""); 4209 #endif /* ACPI_DEBUG */ 4210 4211 static int 4212 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 4213 { 4214 int error; 4215 int old; 4216 4217 old = acpi_debug_objects; 4218 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 4219 if (error != 0 || req->newptr == NULL) 4220 return (error); 4221 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 4222 return (0); 4223 4224 ACPI_SERIAL_BEGIN(acpi); 4225 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 4226 ACPI_SERIAL_END(acpi); 4227 4228 return (0); 4229 } 4230 4231 static int 4232 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 4233 { 4234 char *p; 4235 size_t len; 4236 int i, j; 4237 4238 p = str; 4239 while (isspace(*p) || *p == ',') 4240 p++; 4241 len = strlen(p); 4242 if (len == 0) 4243 return (0); 4244 p = strdup(p, M_TEMP); 4245 for (i = 0; i < len; i++) 4246 if (p[i] == ',') 4247 p[i] = '\0'; 4248 i = j = 0; 4249 while (i < len) 4250 if (isspace(p[i]) || p[i] == '\0') 4251 i++; 4252 else { 4253 i += strlen(p + i) + 1; 4254 j++; 4255 } 4256 if (j == 0) { 4257 free(p, M_TEMP); 4258 return (0); 4259 } 4260 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 4261 iface->num = j; 4262 i = j = 0; 4263 while (i < len) 4264 if (isspace(p[i]) || p[i] == '\0') 4265 i++; 4266 else { 4267 iface->data[j] = p + i; 4268 i += strlen(p + i) + 1; 4269 j++; 4270 } 4271 4272 return (j); 4273 } 4274 4275 static void 4276 acpi_free_interfaces(struct acpi_interface *iface) 4277 { 4278 4279 free(iface->data[0], M_TEMP); 4280 free(iface->data, M_TEMP); 4281 } 4282 4283 static void 4284 acpi_reset_interfaces(device_t dev) 4285 { 4286 struct acpi_interface list; 4287 ACPI_STATUS status; 4288 int i; 4289 4290 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 4291 for (i = 0; i < list.num; i++) { 4292 status = AcpiInstallInterface(list.data[i]); 4293 if (ACPI_FAILURE(status)) 4294 device_printf(dev, 4295 "failed to install _OSI(\"%s\"): %s\n", 4296 list.data[i], AcpiFormatException(status)); 4297 else if (bootverbose) 4298 device_printf(dev, "installed _OSI(\"%s\")\n", 4299 list.data[i]); 4300 } 4301 acpi_free_interfaces(&list); 4302 } 4303 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 4304 for (i = 0; i < list.num; i++) { 4305 status = AcpiRemoveInterface(list.data[i]); 4306 if (ACPI_FAILURE(status)) 4307 device_printf(dev, 4308 "failed to remove _OSI(\"%s\"): %s\n", 4309 list.data[i], AcpiFormatException(status)); 4310 else if (bootverbose) 4311 device_printf(dev, "removed _OSI(\"%s\")\n", 4312 list.data[i]); 4313 } 4314 acpi_free_interfaces(&list); 4315 } 4316 } 4317 4318 static int 4319 acpi_pm_func(u_long cmd, void *arg, ...) 4320 { 4321 int state, acpi_state; 4322 int error; 4323 struct acpi_softc *sc; 4324 va_list ap; 4325 4326 error = 0; 4327 switch (cmd) { 4328 case POWER_CMD_SUSPEND: 4329 sc = (struct acpi_softc *)arg; 4330 if (sc == NULL) { 4331 error = EINVAL; 4332 goto out; 4333 } 4334 4335 va_start(ap, arg); 4336 state = va_arg(ap, int); 4337 va_end(ap); 4338 4339 switch (state) { 4340 case POWER_SLEEP_STATE_STANDBY: 4341 acpi_state = sc->acpi_standby_sx; 4342 break; 4343 case POWER_SLEEP_STATE_SUSPEND: 4344 acpi_state = sc->acpi_suspend_sx; 4345 break; 4346 case POWER_SLEEP_STATE_HIBERNATE: 4347 acpi_state = ACPI_STATE_S4; 4348 break; 4349 default: 4350 error = EINVAL; 4351 goto out; 4352 } 4353 4354 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 4355 error = ENXIO; 4356 break; 4357 default: 4358 error = EINVAL; 4359 goto out; 4360 } 4361 4362 out: 4363 return (error); 4364 } 4365 4366 static void 4367 acpi_pm_register(void *arg) 4368 { 4369 if (!cold || resource_disabled("acpi", 0)) 4370 return; 4371 4372 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 4373 } 4374 4375 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, NULL); 4376