1 /*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #include "opt_acpi.h" 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/proc.h> 36 #include <sys/fcntl.h> 37 #include <sys/malloc.h> 38 #include <sys/module.h> 39 #include <sys/bus.h> 40 #include <sys/conf.h> 41 #include <sys/ioccom.h> 42 #include <sys/reboot.h> 43 #include <sys/sysctl.h> 44 #include <sys/ctype.h> 45 #include <sys/linker.h> 46 #include <sys/power.h> 47 #include <sys/sbuf.h> 48 #include <sys/smp.h> 49 50 #include <machine/clock.h> 51 #include <machine/resource.h> 52 #include <machine/bus.h> 53 #include <sys/rman.h> 54 #include <isa/isavar.h> 55 #include <isa/pnpvar.h> 56 57 #include "acpi.h" 58 #include <dev/acpica/acpivar.h> 59 #include <dev/acpica/acpiio.h> 60 #include <contrib/dev/acpica/acnamesp.h> 61 62 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 63 64 /* Hooks for the ACPI CA debugging infrastructure */ 65 #define _COMPONENT ACPI_BUS 66 ACPI_MODULE_NAME("ACPI") 67 68 static d_open_t acpiopen; 69 static d_close_t acpiclose; 70 static d_ioctl_t acpiioctl; 71 72 static struct cdevsw acpi_cdevsw = { 73 .d_version = D_VERSION, 74 .d_flags = D_NEEDGIANT, 75 .d_open = acpiopen, 76 .d_close = acpiclose, 77 .d_ioctl = acpiioctl, 78 .d_name = "acpi", 79 }; 80 81 /* Global mutex for locking access to the ACPI subsystem. */ 82 struct mtx acpi_mutex; 83 84 /* Bitmap of device quirks. */ 85 int acpi_quirks; 86 87 /* Local pools for managing system resources for ACPI child devices. */ 88 struct rman acpi_rman_io, acpi_rman_mem; 89 90 static int acpi_modevent(struct module *mod, int event, void *junk); 91 static void acpi_identify(driver_t *driver, device_t parent); 92 static int acpi_probe(device_t dev); 93 static int acpi_attach(device_t dev); 94 static int acpi_shutdown(device_t dev); 95 static device_t acpi_add_child(device_t bus, int order, const char *name, 96 int unit); 97 static int acpi_print_child(device_t bus, device_t child); 98 static int acpi_read_ivar(device_t dev, device_t child, int index, 99 uintptr_t *result); 100 static int acpi_write_ivar(device_t dev, device_t child, int index, 101 uintptr_t value); 102 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 103 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 104 int type, int *rid, u_long start, u_long end, 105 u_long count, u_int flags); 106 static int acpi_release_resource(device_t bus, device_t child, int type, 107 int rid, struct resource *r); 108 static uint32_t acpi_isa_get_logicalid(device_t dev); 109 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 110 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 111 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 112 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 113 ACPI_BUFFER *ret); 114 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 115 void *context, void **retval); 116 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 117 int max_depth, acpi_scan_cb_t user_fn, void *arg); 118 static int acpi_isa_pnp_probe(device_t bus, device_t child, 119 struct isa_pnp_id *ids); 120 static void acpi_probe_children(device_t bus); 121 static int acpi_probe_order(ACPI_HANDLE handle, int *order); 122 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 123 void *context, void **status); 124 static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid); 125 static void acpi_shutdown_final(void *arg, int howto); 126 static void acpi_enable_fixed_events(struct acpi_softc *sc); 127 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 128 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 129 static int acpi_wake_prep_walk(int sstate); 130 static int acpi_wake_sysctl_walk(device_t dev); 131 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 132 static void acpi_system_eventhandler_sleep(void *arg, int state); 133 static void acpi_system_eventhandler_wakeup(void *arg, int state); 134 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 135 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 136 static int acpi_pm_func(u_long cmd, void *arg, ...); 137 static int acpi_child_location_str_method(device_t acdev, device_t child, 138 char *buf, size_t buflen); 139 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 140 char *buf, size_t buflen); 141 142 static device_method_t acpi_methods[] = { 143 /* Device interface */ 144 DEVMETHOD(device_identify, acpi_identify), 145 DEVMETHOD(device_probe, acpi_probe), 146 DEVMETHOD(device_attach, acpi_attach), 147 DEVMETHOD(device_shutdown, acpi_shutdown), 148 DEVMETHOD(device_detach, bus_generic_detach), 149 DEVMETHOD(device_suspend, bus_generic_suspend), 150 DEVMETHOD(device_resume, bus_generic_resume), 151 152 /* Bus interface */ 153 DEVMETHOD(bus_add_child, acpi_add_child), 154 DEVMETHOD(bus_print_child, acpi_print_child), 155 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 156 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 157 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 158 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 159 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 160 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 161 DEVMETHOD(bus_release_resource, acpi_release_resource), 162 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 163 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 164 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 165 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 166 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 167 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 168 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 169 170 /* ACPI bus */ 171 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 172 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 173 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 174 175 /* ISA emulation */ 176 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 177 178 {0, 0} 179 }; 180 181 static driver_t acpi_driver = { 182 "acpi", 183 acpi_methods, 184 sizeof(struct acpi_softc), 185 }; 186 187 static devclass_t acpi_devclass; 188 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 189 MODULE_VERSION(acpi, 1); 190 191 static const char* sleep_state_names[] = { 192 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 193 194 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, NULL, "ACPI debugging"); 195 static char acpi_ca_version[12]; 196 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 197 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 198 199 /* 200 * Allow override of whether methods execute in parallel or not. 201 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 202 * errors for AML that really can't handle parallel method execution. 203 * It is off by default since this breaks recursive methods and 204 * some IBMs use such code. 205 */ 206 static int acpi_serialize_methods; 207 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 208 209 /* 210 * ACPI can only be loaded as a module by the loader; activating it after 211 * system bootstrap time is not useful, and can be fatal to the system. 212 * It also cannot be unloaded, since the entire system bus heirarchy hangs 213 * off it. 214 */ 215 static int 216 acpi_modevent(struct module *mod, int event, void *junk) 217 { 218 switch (event) { 219 case MOD_LOAD: 220 if (!cold) { 221 printf("The ACPI driver cannot be loaded after boot.\n"); 222 return (EPERM); 223 } 224 break; 225 case MOD_UNLOAD: 226 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 227 return (EBUSY); 228 break; 229 default: 230 break; 231 } 232 return (0); 233 } 234 235 /* 236 * Perform early initialization. 237 */ 238 ACPI_STATUS 239 acpi_Startup(void) 240 { 241 #ifdef ACPI_DEBUGGER 242 char *debugpoint; 243 #endif 244 static int started = 0; 245 int error, val; 246 247 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 248 249 if (started) 250 return_VALUE (0); 251 started = 1; 252 253 /* Initialise the ACPI mutex */ 254 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 255 256 /* 257 * Set the globals from our tunables. This is needed because ACPI-CA 258 * uses UINT8 for some values and we have no tunable_byte. 259 */ 260 AcpiGbl_AllMethodsSerialized = (UINT8)acpi_serialize_methods; 261 262 /* Start up the ACPI CA subsystem. */ 263 #ifdef ACPI_DEBUGGER 264 debugpoint = getenv("debug.acpi.debugger"); 265 if (debugpoint) { 266 if (!strcmp(debugpoint, "init")) 267 acpi_EnterDebugger(); 268 freeenv(debugpoint); 269 } 270 #endif 271 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 272 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 273 return_VALUE (error); 274 } 275 #ifdef ACPI_DEBUGGER 276 debugpoint = getenv("debug.acpi.debugger"); 277 if (debugpoint) { 278 if (!strcmp(debugpoint, "tables")) 279 acpi_EnterDebugger(); 280 freeenv(debugpoint); 281 } 282 #endif 283 284 if (ACPI_FAILURE(error = AcpiLoadTables())) { 285 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 286 AcpiTerminate(); 287 return_VALUE (error); 288 } 289 290 /* Set up any quirks we have for this system. */ 291 acpi_table_quirks(&acpi_quirks); 292 293 /* If the user manually set the disabled hint to 0, override any quirk. */ 294 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 295 acpi_quirks &= ~ACPI_Q_BROKEN; 296 if (acpi_quirks & ACPI_Q_BROKEN) { 297 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 298 AcpiTerminate(); 299 return_VALUE (AE_ERROR); 300 } 301 302 return_VALUE (AE_OK); 303 } 304 305 /* 306 * Detect ACPI, perform early initialisation 307 */ 308 static void 309 acpi_identify(driver_t *driver, device_t parent) 310 { 311 device_t child; 312 313 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 314 315 if (!cold) 316 return_VOID; 317 318 /* Check that we haven't been disabled with a hint. */ 319 if (resource_disabled("acpi", 0)) 320 return_VOID; 321 322 /* Make sure we're not being doubly invoked. */ 323 if (device_find_child(parent, "acpi", 0) != NULL) 324 return_VOID; 325 326 /* Initialize ACPI-CA. */ 327 if (ACPI_FAILURE(acpi_Startup())) 328 return_VOID; 329 330 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION); 331 332 /* Attach the actual ACPI device. */ 333 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 334 device_printf(parent, "ACPI: could not attach\n"); 335 return_VOID; 336 } 337 } 338 339 /* 340 * Fetch some descriptive data from ACPI to put in our attach message 341 */ 342 static int 343 acpi_probe(device_t dev) 344 { 345 ACPI_TABLE_HEADER th; 346 char buf[20]; 347 int error; 348 struct sbuf sb; 349 ACPI_STATUS status; 350 ACPI_LOCK_DECL; 351 352 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 353 354 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 355 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 356 357 device_printf(dev, "Other PM system enabled.\n"); 358 return_VALUE(ENXIO); 359 } 360 361 ACPI_LOCK; 362 363 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 364 device_printf(dev, "couldn't get XSDT header: %s\n", 365 AcpiFormatException(status)); 366 error = ENXIO; 367 } else { 368 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 369 sbuf_bcat(&sb, th.OemId, 6); 370 sbuf_trim(&sb); 371 sbuf_putc(&sb, ' '); 372 sbuf_bcat(&sb, th.OemTableId, 8); 373 sbuf_trim(&sb); 374 sbuf_finish(&sb); 375 device_set_desc_copy(dev, sbuf_data(&sb)); 376 sbuf_delete(&sb); 377 error = 0; 378 } 379 ACPI_UNLOCK; 380 return_VALUE(error); 381 } 382 383 static int 384 acpi_attach(device_t dev) 385 { 386 struct acpi_softc *sc; 387 ACPI_STATUS status; 388 int error, state; 389 UINT32 flags; 390 UINT8 TypeA, TypeB; 391 char *env; 392 #ifdef ACPI_DEBUGGER 393 char *debugpoint; 394 #endif 395 ACPI_LOCK_DECL; 396 397 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 398 ACPI_LOCK; 399 sc = device_get_softc(dev); 400 bzero(sc, sizeof(*sc)); 401 sc->acpi_dev = dev; 402 403 /* Initialize resource manager. */ 404 acpi_rman_io.rm_type = RMAN_ARRAY; 405 acpi_rman_io.rm_start = 0; 406 acpi_rman_io.rm_end = 0xffff; 407 acpi_rman_io.rm_descr = "I/O ports"; 408 if (rman_init(&acpi_rman_io) != 0) 409 panic("acpi rman_init IO ports failed"); 410 acpi_rman_mem.rm_type = RMAN_ARRAY; 411 acpi_rman_mem.rm_start = 0; 412 acpi_rman_mem.rm_end = ~0ul; 413 acpi_rman_mem.rm_descr = "I/O memory addresses"; 414 if (rman_init(&acpi_rman_mem) != 0) 415 panic("acpi rman_init memory failed"); 416 417 #ifdef ACPI_DEBUGGER 418 debugpoint = getenv("debug.acpi.debugger"); 419 if (debugpoint) { 420 if (!strcmp(debugpoint, "spaces")) 421 acpi_EnterDebugger(); 422 freeenv(debugpoint); 423 } 424 #endif 425 426 /* Install the default address space handlers. */ 427 error = ENXIO; 428 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 429 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 430 if (ACPI_FAILURE(status)) { 431 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 432 AcpiFormatException(status)); 433 goto out; 434 } 435 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 436 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 437 if (ACPI_FAILURE(status)) { 438 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 439 AcpiFormatException(status)); 440 goto out; 441 } 442 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 443 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 444 if (ACPI_FAILURE(status)) { 445 device_printf(dev, "could not initialise PciConfig handler: %s\n", 446 AcpiFormatException(status)); 447 goto out; 448 } 449 450 /* 451 * Bring ACPI fully online. 452 * 453 * Note that some systems (specifically, those with namespace evaluation 454 * issues that require the avoidance of parts of the namespace) must 455 * avoid running _INI and _STA on everything, as well as dodging the final 456 * object init pass. 457 * 458 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 459 * 460 * XXX We should arrange for the object init pass after we have attached 461 * all our child devices, but on many systems it works here. 462 */ 463 #ifdef ACPI_DEBUGGER 464 debugpoint = getenv("debug.acpi.debugger"); 465 if (debugpoint) { 466 if (!strcmp(debugpoint, "enable")) 467 acpi_EnterDebugger(); 468 freeenv(debugpoint); 469 } 470 #endif 471 flags = 0; 472 if (testenv("debug.acpi.avoid")) 473 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 474 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 475 device_printf(dev, "Could not enable ACPI: %s\n", 476 AcpiFormatException(status)); 477 goto out; 478 } 479 480 /* 481 * Call the ECDT probe function to provide EC functionality before 482 * the namespace has been evaluated. 483 */ 484 acpi_ec_ecdt_probe(dev); 485 486 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 487 device_printf(dev, "Could not initialize ACPI objects: %s\n", 488 AcpiFormatException(status)); 489 goto out; 490 } 491 492 /* 493 * Setup our sysctl tree. 494 * 495 * XXX: This doesn't check to make sure that none of these fail. 496 */ 497 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 498 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 499 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 500 device_get_name(dev), CTLFLAG_RD, 0, ""); 501 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 502 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 503 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 504 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 505 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 506 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 507 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 508 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 509 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 510 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 511 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 512 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 513 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 514 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 515 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 516 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 517 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 518 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 519 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 520 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 521 &sc->acpi_sleep_delay, 0, "sleep delay"); 522 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 523 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 524 &sc->acpi_s4bios, 0, "S4BIOS mode"); 525 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 526 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 527 &sc->acpi_verbose, 0, "verbose mode"); 528 529 /* 530 * Default to 1 second before sleeping to give some machines time to 531 * stabilize. 532 */ 533 sc->acpi_sleep_delay = 1; 534 if (bootverbose) 535 sc->acpi_verbose = 1; 536 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) { 537 sc->acpi_verbose = 1; 538 freeenv(env); 539 } 540 541 /* Only enable S4BIOS by default if the FACS says it is available. */ 542 if (AcpiGbl_FACS->S4Bios_f != 0) 543 sc->acpi_s4bios = 1; 544 545 /* 546 * Dispatch the default sleep state to devices. The lid switch is set 547 * to NONE by default to avoid surprising users. 548 */ 549 sc->acpi_power_button_sx = ACPI_STATE_S5; 550 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 551 sc->acpi_standby_sx = ACPI_STATE_S1; 552 sc->acpi_suspend_sx = ACPI_STATE_S3; 553 554 /* Pick the first valid sleep state for the sleep button default. */ 555 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 556 for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++) 557 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 558 sc->acpi_sleep_button_sx = state; 559 break; 560 } 561 562 acpi_enable_fixed_events(sc); 563 564 /* 565 * Scan the namespace and attach/initialise children. 566 */ 567 #ifdef ACPI_DEBUGGER 568 debugpoint = getenv("debug.acpi.debugger"); 569 if (debugpoint) { 570 if (!strcmp(debugpoint, "probe")) 571 acpi_EnterDebugger(); 572 freeenv(debugpoint); 573 } 574 #endif 575 576 /* Register our shutdown handler. */ 577 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 578 SHUTDOWN_PRI_LAST); 579 580 /* 581 * Register our acpi event handlers. 582 * XXX should be configurable eg. via userland policy manager. 583 */ 584 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 585 sc, ACPI_EVENT_PRI_LAST); 586 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 587 sc, ACPI_EVENT_PRI_LAST); 588 589 /* Flag our initial states. */ 590 sc->acpi_enabled = 1; 591 sc->acpi_sstate = ACPI_STATE_S0; 592 sc->acpi_sleep_disabled = 0; 593 594 /* Create the control device */ 595 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 596 "acpi"); 597 sc->acpi_dev_t->si_drv1 = sc; 598 599 #ifdef ACPI_DEBUGGER 600 debugpoint = getenv("debug.acpi.debugger"); 601 if (debugpoint) { 602 if (strcmp(debugpoint, "running") == 0) 603 acpi_EnterDebugger(); 604 freeenv(debugpoint); 605 } 606 #endif 607 608 #ifdef ACPI_USE_THREADS 609 if ((error = acpi_task_thread_init())) 610 goto out; 611 #endif 612 613 if ((error = acpi_machdep_init(dev))) 614 goto out; 615 616 /* Register ACPI again to pass the correct argument of pm_func. */ 617 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 618 619 if (!acpi_disabled("bus")) 620 acpi_probe_children(dev); 621 622 error = 0; 623 624 out: 625 ACPI_UNLOCK; 626 return_VALUE (error); 627 } 628 629 static int 630 acpi_shutdown(device_t dev) 631 { 632 633 /* Allow children to shutdown first. */ 634 bus_generic_shutdown(dev); 635 636 /* Enable any GPEs that are able to power-on the system (i.e., RTC). */ 637 acpi_wake_prep_walk(ACPI_STATE_S5); 638 639 return (0); 640 } 641 642 /* 643 * Handle a new device being added 644 */ 645 static device_t 646 acpi_add_child(device_t bus, int order, const char *name, int unit) 647 { 648 struct acpi_device *ad; 649 device_t child; 650 651 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 652 return (NULL); 653 654 resource_list_init(&ad->ad_rl); 655 656 child = device_add_child_ordered(bus, order, name, unit); 657 if (child != NULL) 658 device_set_ivars(child, ad); 659 return (child); 660 } 661 662 static int 663 acpi_print_child(device_t bus, device_t child) 664 { 665 struct acpi_device *adev = device_get_ivars(child); 666 struct resource_list *rl = &adev->ad_rl; 667 int retval = 0; 668 669 retval += bus_print_child_header(bus, child); 670 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 671 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 672 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 673 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 674 retval += bus_print_child_footer(bus, child); 675 676 return (retval); 677 } 678 679 /* Location hint for devctl(8) */ 680 static int 681 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 682 size_t buflen) 683 { 684 struct acpi_device *dinfo = device_get_ivars(child); 685 686 if (dinfo->ad_handle) 687 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 688 else 689 snprintf(buf, buflen, "unknown"); 690 return (0); 691 } 692 693 /* PnP information for devctl(8) */ 694 static int 695 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 696 size_t buflen) 697 { 698 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 699 ACPI_DEVICE_INFO *adinfo; 700 struct acpi_device *dinfo = device_get_ivars(child); 701 char *end; 702 int error; 703 704 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 705 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 706 if (error) 707 snprintf(buf, buflen, "unknown"); 708 else 709 snprintf(buf, buflen, "_HID=%s _UID=%lu", 710 (adinfo->Valid & ACPI_VALID_HID) ? 711 adinfo->HardwareId.Value : "none", 712 (adinfo->Valid & ACPI_VALID_UID) ? 713 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 714 if (adinfo) 715 AcpiOsFree(adinfo); 716 717 return (0); 718 } 719 720 /* 721 * Handle per-device ivars 722 */ 723 static int 724 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 725 { 726 struct acpi_device *ad; 727 728 if ((ad = device_get_ivars(child)) == NULL) { 729 printf("device has no ivars\n"); 730 return (ENOENT); 731 } 732 733 /* ACPI and ISA compatibility ivars */ 734 switch(index) { 735 case ACPI_IVAR_HANDLE: 736 *(ACPI_HANDLE *)result = ad->ad_handle; 737 break; 738 case ACPI_IVAR_MAGIC: 739 *(int *)result = ad->ad_magic; 740 break; 741 case ACPI_IVAR_PRIVATE: 742 *(void **)result = ad->ad_private; 743 break; 744 case ACPI_IVAR_FLAGS: 745 *(int *)result = ad->ad_flags; 746 break; 747 case ISA_IVAR_VENDORID: 748 case ISA_IVAR_SERIAL: 749 case ISA_IVAR_COMPATID: 750 *(int *)result = -1; 751 break; 752 case ISA_IVAR_LOGICALID: 753 *(int *)result = acpi_isa_get_logicalid(child); 754 break; 755 default: 756 return (ENOENT); 757 } 758 759 return (0); 760 } 761 762 static int 763 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 764 { 765 struct acpi_device *ad; 766 767 if ((ad = device_get_ivars(child)) == NULL) { 768 printf("device has no ivars\n"); 769 return (ENOENT); 770 } 771 772 switch(index) { 773 case ACPI_IVAR_HANDLE: 774 ad->ad_handle = (ACPI_HANDLE)value; 775 break; 776 case ACPI_IVAR_MAGIC: 777 ad->ad_magic = (int)value; 778 break; 779 case ACPI_IVAR_PRIVATE: 780 ad->ad_private = (void *)value; 781 break; 782 case ACPI_IVAR_FLAGS: 783 ad->ad_flags = (int)value; 784 break; 785 default: 786 panic("bad ivar write request (%d)", index); 787 return (ENOENT); 788 } 789 790 return (0); 791 } 792 793 /* 794 * Handle child resource allocation/removal 795 */ 796 static struct resource_list * 797 acpi_get_rlist(device_t dev, device_t child) 798 { 799 struct acpi_device *ad; 800 801 ad = device_get_ivars(child); 802 return (&ad->ad_rl); 803 } 804 805 static struct resource * 806 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 807 u_long start, u_long end, u_long count, u_int flags) 808 { 809 ACPI_RESOURCE ares; 810 struct acpi_device *ad = device_get_ivars(child); 811 struct resource_list *rl = &ad->ad_rl; 812 struct resource_list_entry *rle; 813 struct resource *res; 814 struct rman *rm; 815 816 /* 817 * If this is an allocation of the "default" range for a given RID, and 818 * we know what the resources for this device are (i.e., they're on the 819 * child's resource list), use those start/end values. 820 */ 821 if (start == 0UL && end == ~0UL) { 822 rle = resource_list_find(rl, type, *rid); 823 if (rle == NULL) 824 return (NULL); 825 start = rle->start; 826 end = rle->end; 827 count = rle->count; 828 } 829 830 /* If we don't manage this address, pass the request up to the parent. */ 831 rle = acpi_sysres_find(type, start); 832 if (rle == NULL) { 833 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 834 start, end, count, flags); 835 } else { 836 837 /* We only handle memory and IO resources through rman. */ 838 switch (type) { 839 case SYS_RES_IOPORT: 840 rm = &acpi_rman_io; 841 break; 842 case SYS_RES_MEMORY: 843 rm = &acpi_rman_mem; 844 break; 845 default: 846 panic("acpi_alloc_resource: invalid res type %d", type); 847 } 848 849 /* If we do know it, allocate it from the local pool. */ 850 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 851 child); 852 if (res == NULL) 853 return (NULL); 854 855 /* Copy the bus tag and handle from the pre-allocated resource. */ 856 rman_set_bustag(res, rman_get_bustag(rle->res)); 857 rman_set_bushandle(res, rman_get_start(res)); 858 859 /* If requested, activate the resource using the parent's method. */ 860 if (flags & RF_ACTIVE) 861 if (bus_activate_resource(child, type, *rid, res) != 0) { 862 rman_release_resource(res); 863 return (NULL); 864 } 865 } 866 867 if (res != NULL && device_get_parent(child) == bus) 868 switch (type) { 869 case SYS_RES_IRQ: 870 /* 871 * Since bus_config_intr() takes immediate effect, we cannot 872 * configure the interrupt associated with a device when we 873 * parse the resources but have to defer it until a driver 874 * actually allocates the interrupt via bus_alloc_resource(). 875 * 876 * XXX: Should we handle the lookup failing? 877 */ 878 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 879 acpi_config_intr(child, &ares); 880 break; 881 } 882 return (res); 883 } 884 885 static int 886 acpi_release_resource(device_t bus, device_t child, int type, int rid, 887 struct resource *r) 888 { 889 int ret; 890 891 /* 892 * If we know about this address, deactivate it and release it to the 893 * local pool. If we don't, pass this request up to the parent. 894 */ 895 if (acpi_sysres_find(type, rman_get_start(r)) == NULL) { 896 if (rman_get_flags(r) & RF_ACTIVE) { 897 ret = bus_deactivate_resource(child, type, rid, r); 898 if (ret != 0) 899 return (ret); 900 } 901 ret = rman_release_resource(r); 902 } else 903 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 904 905 return (ret); 906 } 907 908 /* Allocate an IO port or memory resource, given its GAS. */ 909 struct resource * 910 acpi_bus_alloc_gas(device_t dev, int *rid, ACPI_GENERIC_ADDRESS *gas) 911 { 912 int type; 913 914 if (gas == NULL || !ACPI_VALID_ADDRESS(gas->Address) || 915 gas->RegisterBitWidth < 8) 916 return (NULL); 917 918 switch (gas->AddressSpaceId) { 919 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 920 type = SYS_RES_MEMORY; 921 break; 922 case ACPI_ADR_SPACE_SYSTEM_IO: 923 type = SYS_RES_IOPORT; 924 break; 925 default: 926 return (NULL); 927 } 928 929 bus_set_resource(dev, type, *rid, gas->Address, gas->RegisterBitWidth / 8); 930 return (bus_alloc_resource_any(dev, type, rid, RF_ACTIVE)); 931 } 932 933 /* Probe _HID and _CID for compatible ISA PNP ids. */ 934 static uint32_t 935 acpi_isa_get_logicalid(device_t dev) 936 { 937 ACPI_DEVICE_INFO *devinfo; 938 ACPI_BUFFER buf; 939 ACPI_HANDLE h; 940 ACPI_STATUS error; 941 u_int32_t pnpid; 942 ACPI_LOCK_DECL; 943 944 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 945 946 pnpid = 0; 947 buf.Pointer = NULL; 948 buf.Length = ACPI_ALLOCATE_BUFFER; 949 950 ACPI_LOCK; 951 952 /* Fetch and validate the HID. */ 953 if ((h = acpi_get_handle(dev)) == NULL) 954 goto out; 955 error = AcpiGetObjectInfo(h, &buf); 956 if (ACPI_FAILURE(error)) 957 goto out; 958 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 959 960 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 961 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 962 963 out: 964 if (buf.Pointer != NULL) 965 AcpiOsFree(buf.Pointer); 966 ACPI_UNLOCK; 967 return_VALUE (pnpid); 968 } 969 970 static int 971 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 972 { 973 ACPI_DEVICE_INFO *devinfo; 974 ACPI_BUFFER buf; 975 ACPI_HANDLE h; 976 ACPI_STATUS error; 977 uint32_t *pnpid; 978 int valid, i; 979 ACPI_LOCK_DECL; 980 981 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 982 983 pnpid = cids; 984 valid = 0; 985 buf.Pointer = NULL; 986 buf.Length = ACPI_ALLOCATE_BUFFER; 987 988 ACPI_LOCK; 989 990 /* Fetch and validate the CID */ 991 if ((h = acpi_get_handle(dev)) == NULL) 992 goto out; 993 error = AcpiGetObjectInfo(h, &buf); 994 if (ACPI_FAILURE(error)) 995 goto out; 996 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 997 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 998 goto out; 999 1000 if (devinfo->CompatibilityId.Count < count) 1001 count = devinfo->CompatibilityId.Count; 1002 for (i = 0; i < count; i++) { 1003 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 1004 continue; 1005 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 1006 valid++; 1007 } 1008 1009 out: 1010 if (buf.Pointer != NULL) 1011 AcpiOsFree(buf.Pointer); 1012 ACPI_UNLOCK; 1013 return_VALUE (valid); 1014 } 1015 1016 static char * 1017 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1018 { 1019 ACPI_HANDLE h; 1020 int i; 1021 1022 h = acpi_get_handle(dev); 1023 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1024 return (NULL); 1025 1026 /* Try to match one of the array of IDs with a HID or CID. */ 1027 for (i = 0; ids[i] != NULL; i++) { 1028 if (acpi_MatchHid(h, ids[i])) 1029 return (ids[i]); 1030 } 1031 return (NULL); 1032 } 1033 1034 static ACPI_STATUS 1035 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1036 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1037 { 1038 ACPI_HANDLE h; 1039 1040 if (dev == NULL) 1041 h = ACPI_ROOT_OBJECT; 1042 else if ((h = acpi_get_handle(dev)) == NULL) 1043 return (AE_BAD_PARAMETER); 1044 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1045 } 1046 1047 /* Callback arg for our implementation of walking the namespace. */ 1048 struct acpi_device_scan_ctx { 1049 acpi_scan_cb_t user_fn; 1050 void *arg; 1051 ACPI_HANDLE parent; 1052 }; 1053 1054 static ACPI_STATUS 1055 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1056 { 1057 struct acpi_device_scan_ctx *ctx; 1058 device_t dev, old_dev; 1059 ACPI_STATUS status; 1060 ACPI_OBJECT_TYPE type; 1061 1062 /* 1063 * Skip this device if we think we'll have trouble with it or it is 1064 * the parent where the scan began. 1065 */ 1066 ctx = (struct acpi_device_scan_ctx *)arg; 1067 if (acpi_avoid(h) || h == ctx->parent) 1068 return (AE_OK); 1069 1070 /* If this is not a valid device type (e.g., a method), skip it. */ 1071 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1072 return (AE_OK); 1073 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1074 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1075 return (AE_OK); 1076 1077 /* 1078 * Call the user function with the current device. If it is unchanged 1079 * afterwards, return. Otherwise, we update the handle to the new dev. 1080 */ 1081 old_dev = acpi_get_device(h); 1082 dev = old_dev; 1083 status = ctx->user_fn(h, &dev, level, ctx->arg); 1084 if (ACPI_FAILURE(status) || old_dev == dev) 1085 return (status); 1086 1087 /* Remove the old child and its connection to the handle. */ 1088 if (old_dev != NULL) { 1089 device_delete_child(device_get_parent(old_dev), old_dev); 1090 AcpiDetachData(h, acpi_fake_objhandler); 1091 } 1092 1093 /* Recreate the handle association if the user created a device. */ 1094 if (dev != NULL) 1095 AcpiAttachData(h, acpi_fake_objhandler, dev); 1096 1097 return (AE_OK); 1098 } 1099 1100 static ACPI_STATUS 1101 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1102 acpi_scan_cb_t user_fn, void *arg) 1103 { 1104 ACPI_HANDLE h; 1105 struct acpi_device_scan_ctx ctx; 1106 1107 if (acpi_disabled("children")) 1108 return (AE_OK); 1109 1110 if (dev == NULL) 1111 h = ACPI_ROOT_OBJECT; 1112 else if ((h = acpi_get_handle(dev)) == NULL) 1113 return (AE_BAD_PARAMETER); 1114 ctx.user_fn = user_fn; 1115 ctx.arg = arg; 1116 ctx.parent = h; 1117 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1118 acpi_device_scan_cb, &ctx, NULL)); 1119 } 1120 1121 static int 1122 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1123 { 1124 int result, cid_count, i; 1125 uint32_t lid, cids[8]; 1126 1127 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1128 1129 /* 1130 * ISA-style drivers attached to ACPI may persist and 1131 * probe manually if we return ENOENT. We never want 1132 * that to happen, so don't ever return it. 1133 */ 1134 result = ENXIO; 1135 1136 /* Scan the supplied IDs for a match */ 1137 lid = acpi_isa_get_logicalid(child); 1138 cid_count = acpi_isa_get_compatid(child, cids, 8); 1139 while (ids && ids->ip_id) { 1140 if (lid == ids->ip_id) { 1141 result = 0; 1142 goto out; 1143 } 1144 for (i = 0; i < cid_count; i++) { 1145 if (cids[i] == ids->ip_id) { 1146 result = 0; 1147 goto out; 1148 } 1149 } 1150 ids++; 1151 } 1152 1153 out: 1154 return_VALUE (result); 1155 } 1156 1157 /* 1158 * Scan relevant portions of the ACPI namespace and attach child devices. 1159 * 1160 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and 1161 * \_SB_ scopes, and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 1162 */ 1163 static void 1164 acpi_probe_children(device_t bus) 1165 { 1166 ACPI_HANDLE parent; 1167 ACPI_STATUS status; 1168 int i; 1169 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 1170 1171 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1172 ACPI_ASSERTLOCK; 1173 1174 /* 1175 * Scan the namespace and insert placeholders for all the devices that 1176 * we find. We also probe/attach any early devices. 1177 * 1178 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1179 * we want to create nodes for all devices, not just those that are 1180 * currently present. (This assumes that we don't want to create/remove 1181 * devices as they appear, which might be smarter.) 1182 */ 1183 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1184 for (i = 0; scopes[i] != NULL; i++) { 1185 status = AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent); 1186 if (ACPI_SUCCESS(status)) { 1187 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, 1188 bus, NULL); 1189 } 1190 } 1191 1192 /* Create any static children by calling device identify methods. */ 1193 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1194 bus_generic_probe(bus); 1195 1196 /* Probe/attach all children, created staticly and from the namespace. */ 1197 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1198 bus_generic_attach(bus); 1199 1200 /* 1201 * Some of these children may have attached others as part of their attach 1202 * process (eg. the root PCI bus driver), so rescan. 1203 */ 1204 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1205 bus_generic_attach(bus); 1206 1207 /* Attach wake sysctls. */ 1208 acpi_wake_sysctl_walk(bus); 1209 1210 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1211 return_VOID; 1212 } 1213 1214 /* 1215 * Determine the probe order for a given device and return non-zero if it 1216 * should be attached immediately. 1217 */ 1218 static int 1219 acpi_probe_order(ACPI_HANDLE handle, int *order) 1220 { 1221 int ret; 1222 1223 /* 1224 * 1. I/O port and memory system resource holders 1225 * 2. Embedded controllers (to handle early accesses) 1226 */ 1227 ret = 0; 1228 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) { 1229 *order = 1; 1230 ret = 1; 1231 } else if (acpi_MatchHid(handle, "PNP0C09")) { 1232 *order = 2; 1233 ret = 1; 1234 } 1235 1236 /* Always probe/attach immediately if we're debugging. */ 1237 ACPI_DEBUG_EXEC(ret = 1); 1238 1239 return (ret); 1240 } 1241 1242 /* 1243 * Evaluate a child device and determine whether we might attach a device to 1244 * it. 1245 */ 1246 static ACPI_STATUS 1247 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1248 { 1249 ACPI_OBJECT_TYPE type; 1250 device_t child, bus; 1251 int order, probe_now; 1252 1253 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1254 1255 /* Skip this device if we think we'll have trouble with it. */ 1256 if (acpi_avoid(handle)) 1257 return_ACPI_STATUS (AE_OK); 1258 1259 bus = (device_t)context; 1260 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1261 switch (type) { 1262 case ACPI_TYPE_DEVICE: 1263 case ACPI_TYPE_PROCESSOR: 1264 case ACPI_TYPE_THERMAL: 1265 case ACPI_TYPE_POWER: 1266 if (acpi_disabled("children")) 1267 break; 1268 1269 /* 1270 * Create a placeholder device for this node. Sort the placeholder 1271 * so that the probe/attach passes will run breadth-first. Orders 1272 * less than 10 are reserved for special objects (i.e., system 1273 * resources). Larger values are used for all other devices. 1274 */ 1275 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", 1276 acpi_name(handle))); 1277 order = (level + 1) * 10; 1278 probe_now = acpi_probe_order(handle, &order); 1279 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1280 if (child == NULL) 1281 break; 1282 1283 /* Associate the handle with the device_t and vice versa. */ 1284 acpi_set_handle(child, handle); 1285 AcpiAttachData(handle, acpi_fake_objhandler, child); 1286 1287 /* 1288 * Check that the device is present. If it's not present, 1289 * leave it disabled (so that we have a device_t attached to 1290 * the handle, but we don't probe it). 1291 */ 1292 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1293 device_disable(child); 1294 break; 1295 } 1296 1297 /* 1298 * Get the device's resource settings and attach them. 1299 * Note that if the device has _PRS but no _CRS, we need 1300 * to decide when it's appropriate to try to configure the 1301 * device. Ignore the return value here; it's OK for the 1302 * device not to have any resources. 1303 */ 1304 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1305 1306 /* If order was overridden, probe/attach now rather than later. */ 1307 if (probe_now) 1308 device_probe_and_attach(child); 1309 break; 1310 } 1311 } 1312 1313 return_ACPI_STATUS (AE_OK); 1314 } 1315 1316 /* 1317 * AcpiAttachData() requires an object handler but never uses it. This is a 1318 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1319 */ 1320 void 1321 acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data) 1322 { 1323 } 1324 1325 static void 1326 acpi_shutdown_final(void *arg, int howto) 1327 { 1328 ACPI_STATUS status; 1329 1330 /* 1331 * XXX Shutdown code should only run on the BSP (cpuid 0). 1332 * Some chipsets do not power off the system correctly if called from 1333 * an AP. 1334 */ 1335 if ((howto & RB_POWEROFF) != 0) { 1336 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1337 if (ACPI_FAILURE(status)) { 1338 printf("AcpiEnterSleepStatePrep failed - %s\n", 1339 AcpiFormatException(status)); 1340 return; 1341 } 1342 printf("Powering system off using ACPI\n"); 1343 ACPI_DISABLE_IRQS(); 1344 status = AcpiEnterSleepState(ACPI_STATE_S5); 1345 if (ACPI_FAILURE(status)) { 1346 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1347 } else { 1348 DELAY(1000000); 1349 printf("ACPI power-off failed - timeout\n"); 1350 } 1351 } else { 1352 printf("Shutting down ACPI\n"); 1353 AcpiTerminate(); 1354 } 1355 } 1356 1357 static void 1358 acpi_enable_fixed_events(struct acpi_softc *sc) 1359 { 1360 static int first_time = 1; 1361 1362 ACPI_ASSERTLOCK; 1363 1364 /* Enable and clear fixed events and install handlers. */ 1365 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 1366 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1367 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1368 acpi_event_power_button_sleep, sc); 1369 if (first_time) 1370 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1371 } 1372 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 1373 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1374 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1375 acpi_event_sleep_button_sleep, sc); 1376 if (first_time) 1377 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1378 } 1379 1380 first_time = 0; 1381 } 1382 1383 /* 1384 * Returns true if the device is actually present and should 1385 * be attached to. This requires the present, enabled, UI-visible 1386 * and diagnostics-passed bits to be set. 1387 */ 1388 BOOLEAN 1389 acpi_DeviceIsPresent(device_t dev) 1390 { 1391 ACPI_DEVICE_INFO *devinfo; 1392 ACPI_HANDLE h; 1393 ACPI_BUFFER buf; 1394 ACPI_STATUS error; 1395 int ret; 1396 1397 ACPI_ASSERTLOCK; 1398 1399 ret = FALSE; 1400 if ((h = acpi_get_handle(dev)) == NULL) 1401 return (FALSE); 1402 buf.Pointer = NULL; 1403 buf.Length = ACPI_ALLOCATE_BUFFER; 1404 error = AcpiGetObjectInfo(h, &buf); 1405 if (ACPI_FAILURE(error)) 1406 return (FALSE); 1407 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1408 1409 /* If no _STA method, must be present */ 1410 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1411 ret = TRUE; 1412 1413 /* Return true for 'present' and 'functioning' */ 1414 if ((devinfo->CurrentStatus & 0x9) == 0x9) 1415 ret = TRUE; 1416 1417 AcpiOsFree(buf.Pointer); 1418 return (ret); 1419 } 1420 1421 /* 1422 * Returns true if the battery is actually present and inserted. 1423 */ 1424 BOOLEAN 1425 acpi_BatteryIsPresent(device_t dev) 1426 { 1427 ACPI_DEVICE_INFO *devinfo; 1428 ACPI_HANDLE h; 1429 ACPI_BUFFER buf; 1430 ACPI_STATUS error; 1431 int ret; 1432 1433 ACPI_ASSERTLOCK; 1434 1435 ret = FALSE; 1436 if ((h = acpi_get_handle(dev)) == NULL) 1437 return (FALSE); 1438 buf.Pointer = NULL; 1439 buf.Length = ACPI_ALLOCATE_BUFFER; 1440 error = AcpiGetObjectInfo(h, &buf); 1441 if (ACPI_FAILURE(error)) 1442 return (FALSE); 1443 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1444 1445 /* If no _STA method, must be present */ 1446 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1447 ret = TRUE; 1448 1449 /* Return true for 'present' and 'functioning' */ 1450 if ((devinfo->CurrentStatus & 0x19) == 0x19) 1451 ret = TRUE; 1452 1453 AcpiOsFree(buf.Pointer); 1454 return (ret); 1455 } 1456 1457 /* 1458 * Match a HID string against a handle 1459 */ 1460 static BOOLEAN 1461 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1462 { 1463 ACPI_DEVICE_INFO *devinfo; 1464 ACPI_BUFFER buf; 1465 ACPI_STATUS error; 1466 int ret, i; 1467 1468 ACPI_ASSERTLOCK; 1469 1470 ret = FALSE; 1471 if (hid == NULL || h == NULL) 1472 return (ret); 1473 buf.Pointer = NULL; 1474 buf.Length = ACPI_ALLOCATE_BUFFER; 1475 error = AcpiGetObjectInfo(h, &buf); 1476 if (ACPI_FAILURE(error)) 1477 return (ret); 1478 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1479 1480 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1481 strcmp(hid, devinfo->HardwareId.Value) == 0) 1482 ret = TRUE; 1483 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1484 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1485 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1486 ret = TRUE; 1487 break; 1488 } 1489 } 1490 } 1491 1492 AcpiOsFree(buf.Pointer); 1493 return (ret); 1494 } 1495 1496 /* 1497 * Return the handle of a named object within our scope, ie. that of (parent) 1498 * or one if its parents. 1499 */ 1500 ACPI_STATUS 1501 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1502 { 1503 ACPI_HANDLE r; 1504 ACPI_STATUS status; 1505 1506 ACPI_ASSERTLOCK; 1507 1508 /* Walk back up the tree to the root */ 1509 for (;;) { 1510 status = AcpiGetHandle(parent, path, &r); 1511 if (ACPI_SUCCESS(status)) { 1512 *result = r; 1513 return (AE_OK); 1514 } 1515 if (status != AE_NOT_FOUND) 1516 return (AE_OK); 1517 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1518 return (AE_NOT_FOUND); 1519 parent = r; 1520 } 1521 } 1522 1523 /* Find the difference between two PM tick counts. */ 1524 uint32_t 1525 acpi_TimerDelta(uint32_t end, uint32_t start) 1526 { 1527 uint32_t delta; 1528 1529 if (end >= start) 1530 delta = end - start; 1531 else if (AcpiGbl_FADT->TmrValExt == 0) 1532 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 1533 else 1534 delta = ((0xFFFFFFFF - start) + end + 1); 1535 return (delta); 1536 } 1537 1538 /* 1539 * Allocate a buffer with a preset data size. 1540 */ 1541 ACPI_BUFFER * 1542 acpi_AllocBuffer(int size) 1543 { 1544 ACPI_BUFFER *buf; 1545 1546 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1547 return (NULL); 1548 buf->Length = size; 1549 buf->Pointer = (void *)(buf + 1); 1550 return (buf); 1551 } 1552 1553 ACPI_STATUS 1554 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1555 { 1556 ACPI_OBJECT arg1; 1557 ACPI_OBJECT_LIST args; 1558 1559 ACPI_ASSERTLOCK; 1560 1561 arg1.Type = ACPI_TYPE_INTEGER; 1562 arg1.Integer.Value = number; 1563 args.Count = 1; 1564 args.Pointer = &arg1; 1565 1566 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1567 } 1568 1569 /* 1570 * Evaluate a path that should return an integer. 1571 */ 1572 ACPI_STATUS 1573 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1574 { 1575 ACPI_STATUS status; 1576 ACPI_BUFFER buf; 1577 ACPI_OBJECT param; 1578 1579 ACPI_ASSERTLOCK; 1580 1581 if (handle == NULL) 1582 handle = ACPI_ROOT_OBJECT; 1583 1584 /* 1585 * Assume that what we've been pointed at is an Integer object, or 1586 * a method that will return an Integer. 1587 */ 1588 buf.Pointer = ¶m; 1589 buf.Length = sizeof(param); 1590 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1591 if (ACPI_SUCCESS(status)) { 1592 if (param.Type == ACPI_TYPE_INTEGER) 1593 *number = param.Integer.Value; 1594 else 1595 status = AE_TYPE; 1596 } 1597 1598 /* 1599 * In some applications, a method that's expected to return an Integer 1600 * may instead return a Buffer (probably to simplify some internal 1601 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1602 * convert it into an Integer as best we can. 1603 * 1604 * This is a hack. 1605 */ 1606 if (status == AE_BUFFER_OVERFLOW) { 1607 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1608 status = AE_NO_MEMORY; 1609 } else { 1610 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1611 if (ACPI_SUCCESS(status)) 1612 status = acpi_ConvertBufferToInteger(&buf, number); 1613 AcpiOsFree(buf.Pointer); 1614 } 1615 } 1616 return (status); 1617 } 1618 1619 ACPI_STATUS 1620 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1621 { 1622 ACPI_OBJECT *p; 1623 UINT8 *val; 1624 int i; 1625 1626 p = (ACPI_OBJECT *)bufp->Pointer; 1627 if (p->Type == ACPI_TYPE_INTEGER) { 1628 *number = p->Integer.Value; 1629 return (AE_OK); 1630 } 1631 if (p->Type != ACPI_TYPE_BUFFER) 1632 return (AE_TYPE); 1633 if (p->Buffer.Length > sizeof(int)) 1634 return (AE_BAD_DATA); 1635 1636 *number = 0; 1637 val = p->Buffer.Pointer; 1638 for (i = 0; i < p->Buffer.Length; i++) 1639 *number += val[i] << (i * 8); 1640 return (AE_OK); 1641 } 1642 1643 /* 1644 * Iterate over the elements of an a package object, calling the supplied 1645 * function for each element. 1646 * 1647 * XXX possible enhancement might be to abort traversal on error. 1648 */ 1649 ACPI_STATUS 1650 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1651 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1652 { 1653 ACPI_OBJECT *comp; 1654 int i; 1655 1656 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1657 return (AE_BAD_PARAMETER); 1658 1659 /* Iterate over components */ 1660 i = 0; 1661 comp = pkg->Package.Elements; 1662 for (; i < pkg->Package.Count; i++, comp++) 1663 func(comp, arg); 1664 1665 return (AE_OK); 1666 } 1667 1668 /* 1669 * Find the (index)th resource object in a set. 1670 */ 1671 ACPI_STATUS 1672 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1673 { 1674 ACPI_RESOURCE *rp; 1675 int i; 1676 1677 rp = (ACPI_RESOURCE *)buf->Pointer; 1678 i = index; 1679 while (i-- > 0) { 1680 /* Range check */ 1681 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1682 return (AE_BAD_PARAMETER); 1683 1684 /* Check for terminator */ 1685 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1686 return (AE_NOT_FOUND); 1687 rp = ACPI_NEXT_RESOURCE(rp); 1688 } 1689 if (resp != NULL) 1690 *resp = rp; 1691 1692 return (AE_OK); 1693 } 1694 1695 /* 1696 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1697 * 1698 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1699 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1700 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1701 * resources. 1702 */ 1703 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1704 1705 ACPI_STATUS 1706 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1707 { 1708 ACPI_RESOURCE *rp; 1709 void *newp; 1710 1711 /* Initialise the buffer if necessary. */ 1712 if (buf->Pointer == NULL) { 1713 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1714 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1715 return (AE_NO_MEMORY); 1716 rp = (ACPI_RESOURCE *)buf->Pointer; 1717 rp->Id = ACPI_RSTYPE_END_TAG; 1718 rp->Length = 0; 1719 } 1720 if (res == NULL) 1721 return (AE_OK); 1722 1723 /* 1724 * Scan the current buffer looking for the terminator. 1725 * This will either find the terminator or hit the end 1726 * of the buffer and return an error. 1727 */ 1728 rp = (ACPI_RESOURCE *)buf->Pointer; 1729 for (;;) { 1730 /* Range check, don't go outside the buffer */ 1731 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1732 return (AE_BAD_PARAMETER); 1733 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1734 break; 1735 rp = ACPI_NEXT_RESOURCE(rp); 1736 } 1737 1738 /* 1739 * Check the size of the buffer and expand if required. 1740 * 1741 * Required size is: 1742 * size of existing resources before terminator + 1743 * size of new resource and header + 1744 * size of terminator. 1745 * 1746 * Note that this loop should really only run once, unless 1747 * for some reason we are stuffing a *really* huge resource. 1748 */ 1749 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1750 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1751 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1752 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1753 return (AE_NO_MEMORY); 1754 bcopy(buf->Pointer, newp, buf->Length); 1755 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1756 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1757 AcpiOsFree(buf->Pointer); 1758 buf->Pointer = newp; 1759 buf->Length += buf->Length; 1760 } 1761 1762 /* Insert the new resource. */ 1763 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1764 1765 /* And add the terminator. */ 1766 rp = ACPI_NEXT_RESOURCE(rp); 1767 rp->Id = ACPI_RSTYPE_END_TAG; 1768 rp->Length = 0; 1769 1770 return (AE_OK); 1771 } 1772 1773 /* 1774 * Set interrupt model. 1775 */ 1776 ACPI_STATUS 1777 acpi_SetIntrModel(int model) 1778 { 1779 1780 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 1781 } 1782 1783 #define ACPI_MINIMUM_AWAKETIME 5 1784 1785 static void 1786 acpi_sleep_enable(void *arg) 1787 { 1788 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1789 } 1790 1791 /* 1792 * Set the system sleep state 1793 * 1794 * Currently we support S1-S5 but S4 is only S4BIOS 1795 */ 1796 ACPI_STATUS 1797 acpi_SetSleepState(struct acpi_softc *sc, int state) 1798 { 1799 ACPI_STATUS status = AE_OK; 1800 UINT8 TypeA; 1801 UINT8 TypeB; 1802 1803 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1804 ACPI_ASSERTLOCK; 1805 1806 /* Avoid reentry if already attempting to suspend. */ 1807 if (sc->acpi_sstate != ACPI_STATE_S0) 1808 return_ACPI_STATUS (AE_BAD_PARAMETER); 1809 1810 /* We recently woke up so don't suspend again for a while. */ 1811 if (sc->acpi_sleep_disabled) 1812 return_ACPI_STATUS (AE_OK); 1813 1814 switch (state) { 1815 case ACPI_STATE_S1: 1816 case ACPI_STATE_S2: 1817 case ACPI_STATE_S3: 1818 case ACPI_STATE_S4: 1819 status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB); 1820 if (status == AE_NOT_FOUND) { 1821 device_printf(sc->acpi_dev, 1822 "Sleep state S%d not supported by BIOS\n", state); 1823 break; 1824 } else if (ACPI_FAILURE(status)) { 1825 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 1826 AcpiFormatException(status)); 1827 break; 1828 } 1829 1830 sc->acpi_sstate = state; 1831 sc->acpi_sleep_disabled = 1; 1832 1833 /* Enable any GPEs as appropriate and requested by the user. */ 1834 acpi_wake_prep_walk(state); 1835 1836 /* Inform all devices that we are going to sleep. */ 1837 if (DEVICE_SUSPEND(root_bus) != 0) { 1838 /* 1839 * Re-wake the system. 1840 * 1841 * XXX note that a better two-pass approach with a 'veto' pass 1842 * followed by a "real thing" pass would be better, but the 1843 * current bus interface does not provide for this. 1844 */ 1845 DEVICE_RESUME(root_bus); 1846 return_ACPI_STATUS (AE_ERROR); 1847 } 1848 1849 status = AcpiEnterSleepStatePrep(state); 1850 if (ACPI_FAILURE(status)) { 1851 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1852 AcpiFormatException(status)); 1853 break; 1854 } 1855 1856 if (sc->acpi_sleep_delay > 0) 1857 DELAY(sc->acpi_sleep_delay * 1000000); 1858 1859 if (state != ACPI_STATE_S1) { 1860 acpi_sleep_machdep(sc, state); 1861 1862 /* AcpiEnterSleepState() may be incomplete, unlock if locked. */ 1863 if (AcpiGbl_MutexInfo[ACPI_MTX_HARDWARE].OwnerId != 1864 ACPI_MUTEX_NOT_ACQUIRED) { 1865 1866 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1867 } 1868 1869 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1870 if (state == ACPI_STATE_S4) 1871 AcpiEnable(); 1872 } else { 1873 status = AcpiEnterSleepState((UINT8)state); 1874 if (ACPI_FAILURE(status)) { 1875 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 1876 AcpiFormatException(status)); 1877 break; 1878 } 1879 } 1880 1881 /* Resume devices, re-enable GPEs and fixed events. */ 1882 acpi_wake_prep_walk(state); 1883 AcpiLeaveSleepState((UINT8)state); 1884 DEVICE_RESUME(root_bus); 1885 sc->acpi_sstate = ACPI_STATE_S0; 1886 acpi_enable_fixed_events(sc); 1887 break; 1888 case ACPI_STATE_S5: 1889 /* 1890 * Shut down cleanly and power off. This will call us back through the 1891 * shutdown handlers. 1892 */ 1893 shutdown_nice(RB_POWEROFF); 1894 break; 1895 case ACPI_STATE_S0: 1896 default: 1897 status = AE_BAD_PARAMETER; 1898 break; 1899 } 1900 1901 /* Disable a second sleep request for a short period */ 1902 if (sc->acpi_sleep_disabled) 1903 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 1904 1905 return_ACPI_STATUS (status); 1906 } 1907 1908 /* Initialize a device's wake GPE. */ 1909 int 1910 acpi_wake_init(device_t dev, int type) 1911 { 1912 struct acpi_prw_data prw; 1913 1914 /* Evaluate _PRW to find the GPE. */ 1915 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 1916 return (ENXIO); 1917 1918 /* Set the requested type for the GPE (runtime, wake, or both). */ 1919 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 1920 device_printf(dev, "set GPE type failed\n"); 1921 return (ENXIO); 1922 } 1923 1924 return (0); 1925 } 1926 1927 /* Enable or disable the device's wake GPE. */ 1928 int 1929 acpi_wake_set_enable(device_t dev, int enable) 1930 { 1931 struct acpi_prw_data prw; 1932 ACPI_HANDLE handle; 1933 ACPI_STATUS status; 1934 int flags; 1935 1936 /* Make sure the device supports waking the system and get the GPE. */ 1937 handle = acpi_get_handle(dev); 1938 if (acpi_parse_prw(handle, &prw) != 0) 1939 return (ENXIO); 1940 1941 flags = acpi_get_flags(dev); 1942 if (enable) { 1943 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 1944 if (ACPI_FAILURE(status)) { 1945 device_printf(dev, "enable wake failed\n"); 1946 return (ENXIO); 1947 } 1948 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 1949 } else { 1950 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 1951 if (ACPI_FAILURE(status)) { 1952 device_printf(dev, "disable wake failed\n"); 1953 return (ENXIO); 1954 } 1955 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 1956 } 1957 1958 return (0); 1959 } 1960 1961 static int 1962 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 1963 { 1964 struct acpi_prw_data prw; 1965 device_t dev; 1966 1967 /* Check that this is a wake-capable device and get its GPE. */ 1968 if (acpi_parse_prw(handle, &prw) != 0) 1969 return (ENXIO); 1970 dev = acpi_get_device(handle); 1971 1972 /* 1973 * The destination sleep state must be less than (i.e., higher power) 1974 * or equal to the value specified by _PRW. If this GPE cannot be 1975 * enabled for the next sleep state, then disable it. If it can and 1976 * the user requested it be enabled, turn on any required power resources 1977 * and set _PSW. 1978 */ 1979 if (sstate > prw.lowest_wake) { 1980 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 1981 if (bootverbose) 1982 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 1983 acpi_name(handle), sstate); 1984 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 1985 acpi_pwr_wake_enable(handle, 1); 1986 acpi_SetInteger(handle, "_PSW", 1); 1987 if (bootverbose) 1988 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 1989 acpi_name(handle), sstate); 1990 } 1991 1992 return (0); 1993 } 1994 1995 static int 1996 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 1997 { 1998 struct acpi_prw_data prw; 1999 device_t dev; 2000 2001 /* 2002 * Check that this is a wake-capable device and get its GPE. Return 2003 * now if the user didn't enable this device for wake. 2004 */ 2005 if (acpi_parse_prw(handle, &prw) != 0) 2006 return (ENXIO); 2007 dev = acpi_get_device(handle); 2008 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2009 return (0); 2010 2011 /* 2012 * If this GPE couldn't be enabled for the previous sleep state, it was 2013 * disabled before going to sleep so re-enable it. If it was enabled, 2014 * clear _PSW and turn off any power resources it used. 2015 */ 2016 if (sstate > prw.lowest_wake) { 2017 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2018 if (bootverbose) 2019 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2020 } else { 2021 acpi_SetInteger(handle, "_PSW", 0); 2022 acpi_pwr_wake_enable(handle, 0); 2023 if (bootverbose) 2024 device_printf(dev, "run_prep cleaned up for %s\n", 2025 acpi_name(handle)); 2026 } 2027 2028 return (0); 2029 } 2030 2031 static ACPI_STATUS 2032 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2033 { 2034 int sstate; 2035 2036 /* If suspending, run the sleep prep function, otherwise wake. */ 2037 sstate = *(int *)context; 2038 if (AcpiGbl_SystemAwakeAndRunning) 2039 acpi_wake_sleep_prep(handle, sstate); 2040 else 2041 acpi_wake_run_prep(handle, sstate); 2042 return (AE_OK); 2043 } 2044 2045 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2046 static int 2047 acpi_wake_prep_walk(int sstate) 2048 { 2049 ACPI_HANDLE sb_handle; 2050 2051 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2052 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2053 acpi_wake_prep, &sstate, NULL); 2054 return (0); 2055 } 2056 2057 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2058 static int 2059 acpi_wake_sysctl_walk(device_t dev) 2060 { 2061 int error, i, numdevs; 2062 device_t *devlist; 2063 device_t child; 2064 ACPI_STATUS status; 2065 2066 error = device_get_children(dev, &devlist, &numdevs); 2067 if (error != 0 || numdevs == 0) 2068 return (error); 2069 for (i = 0; i < numdevs; i++) { 2070 child = devlist[i]; 2071 acpi_wake_sysctl_walk(child); 2072 if (!device_is_attached(child)) 2073 continue; 2074 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2075 if (ACPI_SUCCESS(status)) { 2076 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2077 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2078 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2079 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2080 } 2081 } 2082 free(devlist, M_TEMP); 2083 2084 return (0); 2085 } 2086 2087 /* Enable or disable wake from userland. */ 2088 static int 2089 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2090 { 2091 int enable, error; 2092 device_t dev; 2093 2094 dev = (device_t)arg1; 2095 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2096 2097 error = sysctl_handle_int(oidp, &enable, 0, req); 2098 if (error != 0 || req->newptr == NULL) 2099 return (error); 2100 if (enable != 0 && enable != 1) 2101 return (EINVAL); 2102 2103 return (acpi_wake_set_enable(dev, enable)); 2104 } 2105 2106 /* Parse a device's _PRW into a structure. */ 2107 int 2108 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2109 { 2110 ACPI_STATUS status; 2111 ACPI_BUFFER prw_buffer; 2112 ACPI_OBJECT *res, *res2; 2113 int error, i, power_count; 2114 2115 if (h == NULL || prw == NULL) 2116 return (EINVAL); 2117 2118 /* 2119 * The _PRW object (7.2.9) is only required for devices that have the 2120 * ability to wake the system from a sleeping state. 2121 */ 2122 error = EINVAL; 2123 prw_buffer.Pointer = NULL; 2124 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2125 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2126 if (ACPI_FAILURE(status)) 2127 return (ENOENT); 2128 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2129 if (res == NULL) 2130 return (ENOENT); 2131 if (!ACPI_PKG_VALID(res, 2)) 2132 goto out; 2133 2134 /* 2135 * Element 1 of the _PRW object: 2136 * The lowest power system sleeping state that can be entered while still 2137 * providing wake functionality. The sleeping state being entered must 2138 * be less than (i.e., higher power) or equal to this value. 2139 */ 2140 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2141 goto out; 2142 2143 /* 2144 * Element 0 of the _PRW object: 2145 */ 2146 switch (res->Package.Elements[0].Type) { 2147 case ACPI_TYPE_INTEGER: 2148 /* 2149 * If the data type of this package element is numeric, then this 2150 * _PRW package element is the bit index in the GPEx_EN, in the 2151 * GPE blocks described in the FADT, of the enable bit that is 2152 * enabled for the wake event. 2153 */ 2154 prw->gpe_handle = NULL; 2155 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2156 error = 0; 2157 break; 2158 case ACPI_TYPE_PACKAGE: 2159 /* 2160 * If the data type of this package element is a package, then this 2161 * _PRW package element is itself a package containing two 2162 * elements. The first is an object reference to the GPE Block 2163 * device that contains the GPE that will be triggered by the wake 2164 * event. The second element is numeric and it contains the bit 2165 * index in the GPEx_EN, in the GPE Block referenced by the 2166 * first element in the package, of the enable bit that is enabled for 2167 * the wake event. 2168 * 2169 * For example, if this field is a package then it is of the form: 2170 * Package() {\_SB.PCI0.ISA.GPE, 2} 2171 */ 2172 res2 = &res->Package.Elements[0]; 2173 if (!ACPI_PKG_VALID(res2, 2)) 2174 goto out; 2175 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2176 if (prw->gpe_handle == NULL) 2177 goto out; 2178 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2179 goto out; 2180 error = 0; 2181 break; 2182 default: 2183 goto out; 2184 } 2185 2186 /* Elements 2 to N of the _PRW object are power resources. */ 2187 power_count = res->Package.Count - 2; 2188 if (power_count > ACPI_PRW_MAX_POWERRES) { 2189 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2190 power_count = 0; 2191 } 2192 prw->power_res_count = power_count; 2193 for (i = 0; i < power_count; i++) 2194 prw->power_res[i] = res->Package.Elements[i]; 2195 2196 out: 2197 if (prw_buffer.Pointer != NULL) 2198 AcpiOsFree(prw_buffer.Pointer); 2199 return (error); 2200 } 2201 2202 /* 2203 * Enable/Disable ACPI 2204 */ 2205 ACPI_STATUS 2206 acpi_Enable(struct acpi_softc *sc) 2207 { 2208 ACPI_STATUS status; 2209 u_int32_t flags; 2210 2211 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2212 ACPI_ASSERTLOCK; 2213 2214 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 2215 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 2216 if (!sc->acpi_enabled) 2217 status = AcpiEnableSubsystem(flags); 2218 else 2219 status = AE_OK; 2220 2221 if (status == AE_OK) 2222 sc->acpi_enabled = 1; 2223 2224 return_ACPI_STATUS (status); 2225 } 2226 2227 ACPI_STATUS 2228 acpi_Disable(struct acpi_softc *sc) 2229 { 2230 ACPI_STATUS status; 2231 2232 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2233 ACPI_ASSERTLOCK; 2234 2235 if (sc->acpi_enabled) 2236 status = AcpiDisable(); 2237 else 2238 status = AE_OK; 2239 2240 if (status == AE_OK) 2241 sc->acpi_enabled = 0; 2242 2243 return_ACPI_STATUS (status); 2244 } 2245 2246 /* 2247 * ACPI Event Handlers 2248 */ 2249 2250 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2251 2252 static void 2253 acpi_system_eventhandler_sleep(void *arg, int state) 2254 { 2255 ACPI_LOCK_DECL; 2256 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2257 2258 ACPI_LOCK; 2259 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2260 acpi_SetSleepState((struct acpi_softc *)arg, state); 2261 ACPI_UNLOCK; 2262 return_VOID; 2263 } 2264 2265 static void 2266 acpi_system_eventhandler_wakeup(void *arg, int state) 2267 { 2268 ACPI_LOCK_DECL; 2269 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2270 2271 /* Well, what to do? :-) */ 2272 2273 ACPI_LOCK; 2274 ACPI_UNLOCK; 2275 2276 return_VOID; 2277 } 2278 2279 /* 2280 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2281 */ 2282 UINT32 2283 acpi_event_power_button_sleep(void *context) 2284 { 2285 struct acpi_softc *sc = (struct acpi_softc *)context; 2286 2287 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2288 2289 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2290 2291 return_VALUE (ACPI_INTERRUPT_HANDLED); 2292 } 2293 2294 UINT32 2295 acpi_event_power_button_wake(void *context) 2296 { 2297 struct acpi_softc *sc = (struct acpi_softc *)context; 2298 2299 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2300 2301 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2302 2303 return_VALUE (ACPI_INTERRUPT_HANDLED); 2304 } 2305 2306 UINT32 2307 acpi_event_sleep_button_sleep(void *context) 2308 { 2309 struct acpi_softc *sc = (struct acpi_softc *)context; 2310 2311 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2312 2313 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2314 2315 return_VALUE (ACPI_INTERRUPT_HANDLED); 2316 } 2317 2318 UINT32 2319 acpi_event_sleep_button_wake(void *context) 2320 { 2321 struct acpi_softc *sc = (struct acpi_softc *)context; 2322 2323 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2324 2325 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2326 2327 return_VALUE (ACPI_INTERRUPT_HANDLED); 2328 } 2329 2330 /* 2331 * XXX This is kinda ugly, and should not be here. 2332 */ 2333 struct acpi_staticbuf { 2334 ACPI_BUFFER buffer; 2335 char data[512]; 2336 }; 2337 2338 char * 2339 acpi_name(ACPI_HANDLE handle) 2340 { 2341 static struct acpi_staticbuf buf; 2342 2343 ACPI_ASSERTLOCK; 2344 2345 buf.buffer.Length = 512; 2346 buf.buffer.Pointer = &buf.data[0]; 2347 2348 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer))) 2349 return (buf.buffer.Pointer); 2350 2351 return ("(unknown path)"); 2352 } 2353 2354 /* 2355 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2356 * parts of the namespace. 2357 */ 2358 int 2359 acpi_avoid(ACPI_HANDLE handle) 2360 { 2361 char *cp, *env, *np; 2362 int len; 2363 2364 np = acpi_name(handle); 2365 if (*np == '\\') 2366 np++; 2367 if ((env = getenv("debug.acpi.avoid")) == NULL) 2368 return (0); 2369 2370 /* Scan the avoid list checking for a match */ 2371 cp = env; 2372 for (;;) { 2373 while ((*cp != 0) && isspace(*cp)) 2374 cp++; 2375 if (*cp == 0) 2376 break; 2377 len = 0; 2378 while ((cp[len] != 0) && !isspace(cp[len])) 2379 len++; 2380 if (!strncmp(cp, np, len)) { 2381 freeenv(env); 2382 return(1); 2383 } 2384 cp += len; 2385 } 2386 freeenv(env); 2387 2388 return (0); 2389 } 2390 2391 /* 2392 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2393 */ 2394 int 2395 acpi_disabled(char *subsys) 2396 { 2397 char *cp, *env; 2398 int len; 2399 2400 if ((env = getenv("debug.acpi.disabled")) == NULL) 2401 return (0); 2402 if (strcmp(env, "all") == 0) { 2403 freeenv(env); 2404 return (1); 2405 } 2406 2407 /* Scan the disable list, checking for a match. */ 2408 cp = env; 2409 for (;;) { 2410 while (*cp != '\0' && isspace(*cp)) 2411 cp++; 2412 if (*cp == '\0') 2413 break; 2414 len = 0; 2415 while (cp[len] != '\0' && !isspace(cp[len])) 2416 len++; 2417 if (strncmp(cp, subsys, len) == 0) { 2418 freeenv(env); 2419 return (1); 2420 } 2421 cp += len; 2422 } 2423 freeenv(env); 2424 2425 return (0); 2426 } 2427 2428 /* 2429 * Control interface. 2430 * 2431 * We multiplex ioctls for all participating ACPI devices here. Individual 2432 * drivers wanting to be accessible via /dev/acpi should use the 2433 * register/deregister interface to make their handlers visible. 2434 */ 2435 struct acpi_ioctl_hook 2436 { 2437 TAILQ_ENTRY(acpi_ioctl_hook) link; 2438 u_long cmd; 2439 acpi_ioctl_fn fn; 2440 void *arg; 2441 }; 2442 2443 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2444 static int acpi_ioctl_hooks_initted; 2445 2446 /* 2447 * Register an ioctl handler. 2448 */ 2449 int 2450 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2451 { 2452 struct acpi_ioctl_hook *hp; 2453 2454 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2455 return (ENOMEM); 2456 hp->cmd = cmd; 2457 hp->fn = fn; 2458 hp->arg = arg; 2459 if (acpi_ioctl_hooks_initted == 0) { 2460 TAILQ_INIT(&acpi_ioctl_hooks); 2461 acpi_ioctl_hooks_initted = 1; 2462 } 2463 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2464 return (0); 2465 } 2466 2467 /* 2468 * Deregister an ioctl handler. 2469 */ 2470 void 2471 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2472 { 2473 struct acpi_ioctl_hook *hp; 2474 2475 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2476 if ((hp->cmd == cmd) && (hp->fn == fn)) 2477 break; 2478 2479 if (hp != NULL) { 2480 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2481 free(hp, M_ACPIDEV); 2482 } 2483 } 2484 2485 static int 2486 acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2487 { 2488 return (0); 2489 } 2490 2491 static int 2492 acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2493 { 2494 return (0); 2495 } 2496 2497 static int 2498 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2499 { 2500 struct acpi_softc *sc; 2501 struct acpi_ioctl_hook *hp; 2502 int error, xerror, state; 2503 ACPI_LOCK_DECL; 2504 2505 ACPI_LOCK; 2506 2507 error = state = 0; 2508 sc = dev->si_drv1; 2509 2510 /* 2511 * Scan the list of registered ioctls, looking for handlers. 2512 */ 2513 if (acpi_ioctl_hooks_initted) { 2514 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2515 if (hp->cmd == cmd) { 2516 xerror = hp->fn(cmd, addr, hp->arg); 2517 if (xerror != 0) 2518 error = xerror; 2519 goto out; 2520 } 2521 } 2522 } 2523 2524 /* 2525 * Core ioctls are not permitted for non-writable user. 2526 * Currently, other ioctls just fetch information. 2527 * Not changing system behavior. 2528 */ 2529 if ((flag & FWRITE) == 0) 2530 return (EPERM); 2531 2532 /* Core system ioctls. */ 2533 switch (cmd) { 2534 case ACPIIO_ENABLE: 2535 if (ACPI_FAILURE(acpi_Enable(sc))) 2536 error = ENXIO; 2537 break; 2538 case ACPIIO_DISABLE: 2539 if (ACPI_FAILURE(acpi_Disable(sc))) 2540 error = ENXIO; 2541 break; 2542 case ACPIIO_SETSLPSTATE: 2543 if (!sc->acpi_enabled) { 2544 error = ENXIO; 2545 break; 2546 } 2547 state = *(int *)addr; 2548 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 2549 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 2550 error = EINVAL; 2551 } else { 2552 error = EINVAL; 2553 } 2554 break; 2555 default: 2556 if (error == 0) 2557 error = EINVAL; 2558 break; 2559 } 2560 2561 out: 2562 ACPI_UNLOCK; 2563 return (error); 2564 } 2565 2566 static int 2567 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2568 { 2569 char sleep_state[4]; 2570 char buf[16]; 2571 int error; 2572 UINT8 state, TypeA, TypeB; 2573 2574 buf[0] = '\0'; 2575 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) { 2576 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 2577 sprintf(sleep_state, "S%d ", state); 2578 strcat(buf, sleep_state); 2579 } 2580 } 2581 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 2582 return (error); 2583 } 2584 2585 static int 2586 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2587 { 2588 char sleep_state[10]; 2589 int error; 2590 u_int new_state, old_state; 2591 2592 old_state = *(u_int *)oidp->oid_arg1; 2593 if (old_state > ACPI_S_STATES_MAX + 1) { 2594 strcpy(sleep_state, "unknown"); 2595 } else { 2596 bzero(sleep_state, sizeof(sleep_state)); 2597 strncpy(sleep_state, sleep_state_names[old_state], 2598 sizeof(sleep_state_names[old_state])); 2599 } 2600 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2601 if (error == 0 && req->newptr != NULL) { 2602 new_state = ACPI_STATE_S0; 2603 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) { 2604 if (strncmp(sleep_state, sleep_state_names[new_state], 2605 sizeof(sleep_state)) == 0) 2606 break; 2607 } 2608 if (new_state <= ACPI_S_STATES_MAX + 1) { 2609 if (new_state != old_state) 2610 *(u_int *)oidp->oid_arg1 = new_state; 2611 } else { 2612 error = EINVAL; 2613 } 2614 } 2615 2616 return (error); 2617 } 2618 2619 /* Inform devctl(4) when we receive a Notify. */ 2620 void 2621 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 2622 { 2623 char notify_buf[16]; 2624 ACPI_BUFFER handle_buf; 2625 ACPI_STATUS status; 2626 2627 if (subsystem == NULL) 2628 return; 2629 2630 handle_buf.Pointer = NULL; 2631 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 2632 status = AcpiNsHandleToPathname(h, &handle_buf); 2633 if (ACPI_FAILURE(status)) 2634 return; 2635 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 2636 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 2637 AcpiOsFree(handle_buf.Pointer); 2638 } 2639 2640 #ifdef ACPI_DEBUG 2641 /* 2642 * Support for parsing debug options from the kernel environment. 2643 * 2644 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2645 * by specifying the names of the bits in the debug.acpi.layer and 2646 * debug.acpi.level environment variables. Bits may be unset by 2647 * prefixing the bit name with !. 2648 */ 2649 struct debugtag 2650 { 2651 char *name; 2652 UINT32 value; 2653 }; 2654 2655 static struct debugtag dbg_layer[] = { 2656 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2657 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2658 {"ACPI_EVENTS", ACPI_EVENTS}, 2659 {"ACPI_TABLES", ACPI_TABLES}, 2660 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2661 {"ACPI_PARSER", ACPI_PARSER}, 2662 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2663 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2664 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2665 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2666 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2667 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2668 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2669 2670 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2671 {"ACPI_BATTERY", ACPI_BATTERY}, 2672 {"ACPI_BUS", ACPI_BUS}, 2673 {"ACPI_BUTTON", ACPI_BUTTON}, 2674 {"ACPI_EC", ACPI_EC}, 2675 {"ACPI_FAN", ACPI_FAN}, 2676 {"ACPI_POWERRES", ACPI_POWERRES}, 2677 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2678 {"ACPI_THERMAL", ACPI_THERMAL}, 2679 {"ACPI_TIMER", ACPI_TIMER}, 2680 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2681 {NULL, 0} 2682 }; 2683 2684 static struct debugtag dbg_level[] = { 2685 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2686 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2687 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2688 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2689 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2690 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2691 2692 /* Trace verbosity level 1 [Standard Trace Level] */ 2693 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2694 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2695 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2696 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2697 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2698 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2699 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2700 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2701 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2702 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2703 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2704 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2705 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2706 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2707 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2708 2709 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2710 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2711 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2712 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2713 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2714 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2715 2716 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2717 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2718 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2719 {"ACPI_LV_IO", ACPI_LV_IO}, 2720 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2721 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2722 2723 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2724 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2725 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2726 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2727 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2728 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2729 {NULL, 0} 2730 }; 2731 2732 static void 2733 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2734 { 2735 char *ep; 2736 int i, l; 2737 int set; 2738 2739 while (*cp) { 2740 if (isspace(*cp)) { 2741 cp++; 2742 continue; 2743 } 2744 ep = cp; 2745 while (*ep && !isspace(*ep)) 2746 ep++; 2747 if (*cp == '!') { 2748 set = 0; 2749 cp++; 2750 if (cp == ep) 2751 continue; 2752 } else { 2753 set = 1; 2754 } 2755 l = ep - cp; 2756 for (i = 0; tag[i].name != NULL; i++) { 2757 if (!strncmp(cp, tag[i].name, l)) { 2758 if (set) 2759 *flag |= tag[i].value; 2760 else 2761 *flag &= ~tag[i].value; 2762 } 2763 } 2764 cp = ep; 2765 } 2766 } 2767 2768 static void 2769 acpi_set_debugging(void *junk) 2770 { 2771 char *layer, *level; 2772 2773 if (cold) { 2774 AcpiDbgLayer = 0; 2775 AcpiDbgLevel = 0; 2776 } 2777 2778 layer = getenv("debug.acpi.layer"); 2779 level = getenv("debug.acpi.level"); 2780 if (layer == NULL && level == NULL) 2781 return; 2782 2783 printf("ACPI set debug"); 2784 if (layer != NULL) { 2785 if (strcmp("NONE", layer) != 0) 2786 printf(" layer '%s'", layer); 2787 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 2788 freeenv(layer); 2789 } 2790 if (level != NULL) { 2791 if (strcmp("NONE", level) != 0) 2792 printf(" level '%s'", level); 2793 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 2794 freeenv(level); 2795 } 2796 printf("\n"); 2797 } 2798 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 2799 NULL); 2800 2801 static int 2802 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 2803 { 2804 int error, *dbg; 2805 struct debugtag *tag; 2806 struct sbuf sb; 2807 2808 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 2809 return (ENOMEM); 2810 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 2811 tag = &dbg_layer[0]; 2812 dbg = &AcpiDbgLayer; 2813 } else { 2814 tag = &dbg_level[0]; 2815 dbg = &AcpiDbgLevel; 2816 } 2817 2818 /* Get old values if this is a get request. */ 2819 if (*dbg == 0) { 2820 sbuf_cpy(&sb, "NONE"); 2821 } else if (req->newptr == NULL) { 2822 for (; tag->name != NULL; tag++) { 2823 if ((*dbg & tag->value) == tag->value) 2824 sbuf_printf(&sb, "%s ", tag->name); 2825 } 2826 } 2827 sbuf_trim(&sb); 2828 sbuf_finish(&sb); 2829 2830 /* Copy out the old values to the user. */ 2831 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 2832 sbuf_delete(&sb); 2833 2834 /* If the user is setting a string, parse it. */ 2835 if (error == 0 && req->newptr != NULL) { 2836 *dbg = 0; 2837 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 2838 acpi_set_debugging(NULL); 2839 } 2840 2841 return (error); 2842 } 2843 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 2844 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 2845 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 2846 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 2847 #endif 2848 2849 static int 2850 acpi_pm_func(u_long cmd, void *arg, ...) 2851 { 2852 int state, acpi_state; 2853 int error; 2854 struct acpi_softc *sc; 2855 va_list ap; 2856 2857 error = 0; 2858 switch (cmd) { 2859 case POWER_CMD_SUSPEND: 2860 sc = (struct acpi_softc *)arg; 2861 if (sc == NULL) { 2862 error = EINVAL; 2863 goto out; 2864 } 2865 2866 va_start(ap, arg); 2867 state = va_arg(ap, int); 2868 va_end(ap); 2869 2870 switch (state) { 2871 case POWER_SLEEP_STATE_STANDBY: 2872 acpi_state = sc->acpi_standby_sx; 2873 break; 2874 case POWER_SLEEP_STATE_SUSPEND: 2875 acpi_state = sc->acpi_suspend_sx; 2876 break; 2877 case POWER_SLEEP_STATE_HIBERNATE: 2878 acpi_state = ACPI_STATE_S4; 2879 break; 2880 default: 2881 error = EINVAL; 2882 goto out; 2883 } 2884 2885 acpi_SetSleepState(sc, acpi_state); 2886 break; 2887 default: 2888 error = EINVAL; 2889 goto out; 2890 } 2891 2892 out: 2893 return (error); 2894 } 2895 2896 static void 2897 acpi_pm_register(void *arg) 2898 { 2899 if (!cold || resource_disabled("acpi", 0)) 2900 return; 2901 2902 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 2903 } 2904 2905 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 2906