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 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/proc.h> 37 #include <sys/fcntl.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/bus.h> 41 #include <sys/conf.h> 42 #include <sys/ioccom.h> 43 #include <sys/reboot.h> 44 #include <sys/sysctl.h> 45 #include <sys/ctype.h> 46 #include <sys/linker.h> 47 #include <sys/power.h> 48 #include <sys/sbuf.h> 49 #include <sys/sched.h> 50 #include <sys/smp.h> 51 #include <sys/timetc.h> 52 53 #if defined(__i386__) || defined(__amd64__) 54 #include <machine/pci_cfgreg.h> 55 #endif 56 #include <machine/resource.h> 57 #include <machine/bus.h> 58 #include <sys/rman.h> 59 #include <isa/isavar.h> 60 #include <isa/pnpvar.h> 61 62 #include <contrib/dev/acpica/include/acpi.h> 63 #include <contrib/dev/acpica/include/accommon.h> 64 #include <contrib/dev/acpica/include/acnamesp.h> 65 66 #include <dev/acpica/acpivar.h> 67 #include <dev/acpica/acpiio.h> 68 69 #include <vm/vm_param.h> 70 71 static MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 72 73 /* Hooks for the ACPI CA debugging infrastructure */ 74 #define _COMPONENT ACPI_BUS 75 ACPI_MODULE_NAME("ACPI") 76 77 static d_open_t acpiopen; 78 static d_close_t acpiclose; 79 static d_ioctl_t acpiioctl; 80 81 static struct cdevsw acpi_cdevsw = { 82 .d_version = D_VERSION, 83 .d_open = acpiopen, 84 .d_close = acpiclose, 85 .d_ioctl = acpiioctl, 86 .d_name = "acpi", 87 }; 88 89 struct acpi_interface { 90 ACPI_STRING *data; 91 int num; 92 }; 93 94 /* Global mutex for locking access to the ACPI subsystem. */ 95 struct mtx acpi_mutex; 96 97 /* Bitmap of device quirks. */ 98 int acpi_quirks; 99 100 /* Optional ACPI methods for suspend and resume, e.g., _GTS and _BFS. */ 101 int acpi_sleep_flags; 102 103 /* Supported sleep states. */ 104 static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT]; 105 106 static int acpi_modevent(struct module *mod, int event, void *junk); 107 static int acpi_probe(device_t dev); 108 static int acpi_attach(device_t dev); 109 static int acpi_suspend(device_t dev); 110 static int acpi_resume(device_t dev); 111 static int acpi_shutdown(device_t dev); 112 static device_t acpi_add_child(device_t bus, u_int order, const char *name, 113 int unit); 114 static int acpi_print_child(device_t bus, device_t child); 115 static void acpi_probe_nomatch(device_t bus, device_t child); 116 static void acpi_driver_added(device_t dev, driver_t *driver); 117 static int acpi_read_ivar(device_t dev, device_t child, int index, 118 uintptr_t *result); 119 static int acpi_write_ivar(device_t dev, device_t child, int index, 120 uintptr_t value); 121 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 122 static void acpi_reserve_resources(device_t dev); 123 static int acpi_sysres_alloc(device_t dev); 124 static int acpi_set_resource(device_t dev, device_t child, int type, 125 int rid, u_long start, u_long count); 126 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 127 int type, int *rid, u_long start, u_long end, 128 u_long count, u_int flags); 129 static int acpi_adjust_resource(device_t bus, device_t child, int type, 130 struct resource *r, u_long start, u_long end); 131 static int acpi_release_resource(device_t bus, device_t child, int type, 132 int rid, struct resource *r); 133 static void acpi_delete_resource(device_t bus, device_t child, int type, 134 int rid); 135 static uint32_t acpi_isa_get_logicalid(device_t dev); 136 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 137 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 138 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 139 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 140 ACPI_BUFFER *ret); 141 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 142 void *context, void **retval); 143 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 144 int max_depth, acpi_scan_cb_t user_fn, void *arg); 145 static int acpi_set_powerstate(device_t child, int state); 146 static int acpi_isa_pnp_probe(device_t bus, device_t child, 147 struct isa_pnp_id *ids); 148 static void acpi_probe_children(device_t bus); 149 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 150 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 151 void *context, void **status); 152 static void acpi_sleep_enable(void *arg); 153 static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc); 154 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 155 static void acpi_shutdown_final(void *arg, int howto); 156 static void acpi_enable_fixed_events(struct acpi_softc *sc); 157 static BOOLEAN acpi_has_hid(ACPI_HANDLE handle); 158 static void acpi_resync_clock(struct acpi_softc *sc); 159 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 160 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 161 static int acpi_wake_prep_walk(int sstate); 162 static int acpi_wake_sysctl_walk(device_t dev); 163 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 164 static void acpi_system_eventhandler_sleep(void *arg, int state); 165 static void acpi_system_eventhandler_wakeup(void *arg, int state); 166 static int acpi_sname2sstate(const char *sname); 167 static const char *acpi_sstate2sname(int sstate); 168 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 169 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 170 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 171 static int acpi_pm_func(u_long cmd, void *arg, ...); 172 static int acpi_child_location_str_method(device_t acdev, device_t child, 173 char *buf, size_t buflen); 174 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 175 char *buf, size_t buflen); 176 #if defined(__i386__) || defined(__amd64__) 177 static void acpi_enable_pcie(void); 178 #endif 179 static void acpi_hint_device_unit(device_t acdev, device_t child, 180 const char *name, int *unitp); 181 static void acpi_reset_interfaces(device_t dev); 182 183 static device_method_t acpi_methods[] = { 184 /* Device interface */ 185 DEVMETHOD(device_probe, acpi_probe), 186 DEVMETHOD(device_attach, acpi_attach), 187 DEVMETHOD(device_shutdown, acpi_shutdown), 188 DEVMETHOD(device_detach, bus_generic_detach), 189 DEVMETHOD(device_suspend, acpi_suspend), 190 DEVMETHOD(device_resume, acpi_resume), 191 192 /* Bus interface */ 193 DEVMETHOD(bus_add_child, acpi_add_child), 194 DEVMETHOD(bus_print_child, acpi_print_child), 195 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 196 DEVMETHOD(bus_driver_added, acpi_driver_added), 197 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 198 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 199 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 200 DEVMETHOD(bus_set_resource, acpi_set_resource), 201 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 202 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 203 DEVMETHOD(bus_adjust_resource, acpi_adjust_resource), 204 DEVMETHOD(bus_release_resource, acpi_release_resource), 205 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 206 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 207 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 208 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 209 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 210 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 211 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 212 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit), 213 214 /* ACPI bus */ 215 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 216 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 217 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 218 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 219 220 /* ISA emulation */ 221 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 222 223 {0, 0} 224 }; 225 226 static driver_t acpi_driver = { 227 "acpi", 228 acpi_methods, 229 sizeof(struct acpi_softc), 230 }; 231 232 static devclass_t acpi_devclass; 233 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 234 MODULE_VERSION(acpi, 1); 235 236 ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 237 238 /* Local pools for managing system resources for ACPI child devices. */ 239 static struct rman acpi_rman_io, acpi_rman_mem; 240 241 #define ACPI_MINIMUM_AWAKETIME 5 242 243 /* Holds the description of the acpi0 device. */ 244 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 245 246 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 247 static char acpi_ca_version[12]; 248 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 249 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 250 251 /* 252 * Allow overriding _OSI methods. 253 */ 254 static char acpi_install_interface[256]; 255 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, 256 sizeof(acpi_install_interface)); 257 static char acpi_remove_interface[256]; 258 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, 259 sizeof(acpi_remove_interface)); 260 261 /* 262 * Allow override of whether methods execute in parallel or not. 263 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 264 * errors for AML that really can't handle parallel method execution. 265 * It is off by default since this breaks recursive methods and 266 * some IBMs use such code. 267 */ 268 static int acpi_serialize_methods; 269 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 270 271 /* Allow users to dump Debug objects without ACPI debugger. */ 272 static int acpi_debug_objects; 273 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 274 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 275 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 276 "Enable Debug objects"); 277 278 /* Allow the interpreter to ignore common mistakes in BIOS. */ 279 static int acpi_interpreter_slack = 1; 280 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 281 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN, 282 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 283 284 #ifdef __amd64__ 285 /* Reset system clock while resuming. XXX Remove once tested. */ 286 static int acpi_reset_clock = 1; 287 TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock); 288 SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW, 289 &acpi_reset_clock, 1, "Reset system clock while resuming."); 290 #endif 291 292 /* Allow users to override quirks. */ 293 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 294 295 /* Execute optional ACPI methods for suspend and resume. */ 296 TUNABLE_INT("debug.acpi.sleep_flags", &acpi_sleep_flags); 297 SYSCTL_INT(_debug_acpi, OID_AUTO, sleep_flags, CTLFLAG_RW | CTLFLAG_TUN, 298 &acpi_sleep_flags, 0, "Execute optional ACPI methods for suspend/resume."); 299 300 static int acpi_susp_bounce; 301 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 302 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 303 304 /* 305 * ACPI can only be loaded as a module by the loader; activating it after 306 * system bootstrap time is not useful, and can be fatal to the system. 307 * It also cannot be unloaded, since the entire system bus hierarchy hangs 308 * off it. 309 */ 310 static int 311 acpi_modevent(struct module *mod, int event, void *junk) 312 { 313 switch (event) { 314 case MOD_LOAD: 315 if (!cold) { 316 printf("The ACPI driver cannot be loaded after boot.\n"); 317 return (EPERM); 318 } 319 break; 320 case MOD_UNLOAD: 321 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 322 return (EBUSY); 323 break; 324 default: 325 break; 326 } 327 return (0); 328 } 329 330 /* 331 * Perform early initialization. 332 */ 333 ACPI_STATUS 334 acpi_Startup(void) 335 { 336 static int started = 0; 337 ACPI_STATUS status; 338 int val; 339 340 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 341 342 /* Only run the startup code once. The MADT driver also calls this. */ 343 if (started) 344 return_VALUE (AE_OK); 345 started = 1; 346 347 /* 348 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 349 * if more tables exist. 350 */ 351 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 352 printf("ACPI: Table initialisation failed: %s\n", 353 AcpiFormatException(status)); 354 return_VALUE (status); 355 } 356 357 /* Set up any quirks we have for this system. */ 358 if (acpi_quirks == ACPI_Q_OK) 359 acpi_table_quirks(&acpi_quirks); 360 361 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 362 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 363 acpi_quirks &= ~ACPI_Q_BROKEN; 364 if (acpi_quirks & ACPI_Q_BROKEN) { 365 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 366 status = AE_SUPPORT; 367 } 368 369 return_VALUE (status); 370 } 371 372 /* 373 * Detect ACPI and perform early initialisation. 374 */ 375 int 376 acpi_identify(void) 377 { 378 ACPI_TABLE_RSDP *rsdp; 379 ACPI_TABLE_HEADER *rsdt; 380 ACPI_PHYSICAL_ADDRESS paddr; 381 struct sbuf sb; 382 383 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 384 385 if (!cold) 386 return (ENXIO); 387 388 /* Check that we haven't been disabled with a hint. */ 389 if (resource_disabled("acpi", 0)) 390 return (ENXIO); 391 392 /* Check for other PM systems. */ 393 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 394 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 395 printf("ACPI identify failed, other PM system enabled.\n"); 396 return (ENXIO); 397 } 398 399 /* Initialize root tables. */ 400 if (ACPI_FAILURE(acpi_Startup())) { 401 printf("ACPI: Try disabling either ACPI or apic support.\n"); 402 return (ENXIO); 403 } 404 405 if ((paddr = AcpiOsGetRootPointer()) == 0 || 406 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 407 return (ENXIO); 408 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 409 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 410 else 411 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 412 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 413 414 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 415 return (ENXIO); 416 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); 417 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 418 sbuf_trim(&sb); 419 sbuf_putc(&sb, ' '); 420 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 421 sbuf_trim(&sb); 422 sbuf_finish(&sb); 423 sbuf_delete(&sb); 424 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 425 426 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 427 428 return (0); 429 } 430 431 /* 432 * Fetch some descriptive data from ACPI to put in our attach message. 433 */ 434 static int 435 acpi_probe(device_t dev) 436 { 437 438 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 439 440 device_set_desc(dev, acpi_desc); 441 442 return_VALUE (0); 443 } 444 445 static int 446 acpi_attach(device_t dev) 447 { 448 struct acpi_softc *sc; 449 ACPI_STATUS status; 450 int error, state; 451 UINT32 flags; 452 UINT8 TypeA, TypeB; 453 char *env; 454 455 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 456 457 sc = device_get_softc(dev); 458 sc->acpi_dev = dev; 459 callout_init(&sc->susp_force_to, TRUE); 460 461 error = ENXIO; 462 463 /* Initialize resource manager. */ 464 acpi_rman_io.rm_type = RMAN_ARRAY; 465 acpi_rman_io.rm_start = 0; 466 acpi_rman_io.rm_end = 0xffff; 467 acpi_rman_io.rm_descr = "ACPI I/O ports"; 468 if (rman_init(&acpi_rman_io) != 0) 469 panic("acpi rman_init IO ports failed"); 470 acpi_rman_mem.rm_type = RMAN_ARRAY; 471 acpi_rman_mem.rm_start = 0; 472 acpi_rman_mem.rm_end = ~0ul; 473 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 474 if (rman_init(&acpi_rman_mem) != 0) 475 panic("acpi rman_init memory failed"); 476 477 /* Initialise the ACPI mutex */ 478 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 479 480 /* 481 * Set the globals from our tunables. This is needed because ACPI-CA 482 * uses UINT8 for some values and we have no tunable_byte. 483 */ 484 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods ? TRUE : FALSE; 485 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 486 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 487 488 #ifndef ACPI_DEBUG 489 /* 490 * Disable all debugging layers and levels. 491 */ 492 AcpiDbgLayer = 0; 493 AcpiDbgLevel = 0; 494 #endif 495 496 /* Start up the ACPI CA subsystem. */ 497 status = AcpiInitializeSubsystem(); 498 if (ACPI_FAILURE(status)) { 499 device_printf(dev, "Could not initialize Subsystem: %s\n", 500 AcpiFormatException(status)); 501 goto out; 502 } 503 504 /* Override OS interfaces if the user requested. */ 505 acpi_reset_interfaces(dev); 506 507 /* Load ACPI name space. */ 508 status = AcpiLoadTables(); 509 if (ACPI_FAILURE(status)) { 510 device_printf(dev, "Could not load Namespace: %s\n", 511 AcpiFormatException(status)); 512 goto out; 513 } 514 515 #if defined(__i386__) || defined(__amd64__) 516 /* Handle MCFG table if present. */ 517 acpi_enable_pcie(); 518 #endif 519 520 /* 521 * Note that some systems (specifically, those with namespace evaluation 522 * issues that require the avoidance of parts of the namespace) must 523 * avoid running _INI and _STA on everything, as well as dodging the final 524 * object init pass. 525 * 526 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 527 * 528 * XXX We should arrange for the object init pass after we have attached 529 * all our child devices, but on many systems it works here. 530 */ 531 flags = 0; 532 if (testenv("debug.acpi.avoid")) 533 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 534 535 /* Bring the hardware and basic handlers online. */ 536 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 537 device_printf(dev, "Could not enable ACPI: %s\n", 538 AcpiFormatException(status)); 539 goto out; 540 } 541 542 /* 543 * Call the ECDT probe function to provide EC functionality before 544 * the namespace has been evaluated. 545 * 546 * XXX This happens before the sysresource devices have been probed and 547 * attached so its resources come from nexus0. In practice, this isn't 548 * a problem but should be addressed eventually. 549 */ 550 acpi_ec_ecdt_probe(dev); 551 552 /* Bring device objects and regions online. */ 553 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 554 device_printf(dev, "Could not initialize ACPI objects: %s\n", 555 AcpiFormatException(status)); 556 goto out; 557 } 558 559 /* 560 * Setup our sysctl tree. 561 * 562 * XXX: This doesn't check to make sure that none of these fail. 563 */ 564 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 565 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 566 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 567 device_get_name(dev), CTLFLAG_RD, 0, ""); 568 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 569 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 570 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 571 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 572 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 573 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 574 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 575 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 576 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 577 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 578 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 579 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 580 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 581 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 582 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 583 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 584 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 585 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 586 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 587 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 588 "sleep delay in seconds"); 589 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 590 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 591 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 592 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 593 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 594 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 595 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 596 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 597 OID_AUTO, "handle_reboot", CTLFLAG_RW, 598 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 599 600 /* 601 * Default to 1 second before sleeping to give some machines time to 602 * stabilize. 603 */ 604 sc->acpi_sleep_delay = 1; 605 if (bootverbose) 606 sc->acpi_verbose = 1; 607 if ((env = getenv("hw.acpi.verbose")) != NULL) { 608 if (strcmp(env, "0") != 0) 609 sc->acpi_verbose = 1; 610 freeenv(env); 611 } 612 613 /* Only enable reboot by default if the FADT says it is available. */ 614 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 615 sc->acpi_handle_reboot = 1; 616 617 /* Only enable S4BIOS by default if the FACS says it is available. */ 618 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 619 sc->acpi_s4bios = 1; 620 621 /* Probe all supported sleep states. */ 622 acpi_sleep_states[ACPI_STATE_S0] = TRUE; 623 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 624 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 625 acpi_sleep_states[state] = TRUE; 626 627 /* 628 * Dispatch the default sleep state to devices. The lid switch is set 629 * to UNKNOWN by default to avoid surprising users. 630 */ 631 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ? 632 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN; 633 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN; 634 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ? 635 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN; 636 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ? 637 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN; 638 639 /* Pick the first valid sleep state for the sleep button default. */ 640 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN; 641 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 642 if (acpi_sleep_states[state]) { 643 sc->acpi_sleep_button_sx = state; 644 break; 645 } 646 647 acpi_enable_fixed_events(sc); 648 649 /* 650 * Scan the namespace and attach/initialise children. 651 */ 652 653 /* Register our shutdown handler. */ 654 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 655 SHUTDOWN_PRI_LAST); 656 657 /* 658 * Register our acpi event handlers. 659 * XXX should be configurable eg. via userland policy manager. 660 */ 661 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 662 sc, ACPI_EVENT_PRI_LAST); 663 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 664 sc, ACPI_EVENT_PRI_LAST); 665 666 /* Flag our initial states. */ 667 sc->acpi_enabled = TRUE; 668 sc->acpi_sstate = ACPI_STATE_S0; 669 sc->acpi_sleep_disabled = TRUE; 670 671 /* Create the control device */ 672 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 673 "acpi"); 674 sc->acpi_dev_t->si_drv1 = sc; 675 676 if ((error = acpi_machdep_init(dev))) 677 goto out; 678 679 /* Register ACPI again to pass the correct argument of pm_func. */ 680 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 681 682 if (!acpi_disabled("bus")) 683 acpi_probe_children(dev); 684 685 /* Update all GPEs and enable runtime GPEs. */ 686 status = AcpiUpdateAllGpes(); 687 if (ACPI_FAILURE(status)) 688 device_printf(dev, "Could not update all GPEs: %s\n", 689 AcpiFormatException(status)); 690 691 /* Allow sleep request after a while. */ 692 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 693 694 error = 0; 695 696 out: 697 return_VALUE (error); 698 } 699 700 static void 701 acpi_set_power_children(device_t dev, int state) 702 { 703 device_t child, parent; 704 device_t *devlist; 705 struct pci_devinfo *dinfo; 706 int dstate, i, numdevs; 707 708 if (device_get_children(dev, &devlist, &numdevs) != 0) 709 return; 710 711 /* 712 * Retrieve and set D-state for the sleep state if _SxD is present. 713 * Skip children who aren't attached since they are handled separately. 714 */ 715 parent = device_get_parent(dev); 716 for (i = 0; i < numdevs; i++) { 717 child = devlist[i]; 718 dinfo = device_get_ivars(child); 719 dstate = state; 720 if (device_is_attached(child) && 721 acpi_device_pwr_for_sleep(parent, dev, &dstate) == 0) 722 acpi_set_powerstate(child, dstate); 723 } 724 free(devlist, M_TEMP); 725 } 726 727 static int 728 acpi_suspend(device_t dev) 729 { 730 int error; 731 732 GIANT_REQUIRED; 733 734 error = bus_generic_suspend(dev); 735 if (error == 0) 736 acpi_set_power_children(dev, ACPI_STATE_D3); 737 738 return (error); 739 } 740 741 static int 742 acpi_resume(device_t dev) 743 { 744 745 GIANT_REQUIRED; 746 747 acpi_set_power_children(dev, ACPI_STATE_D0); 748 749 return (bus_generic_resume(dev)); 750 } 751 752 static int 753 acpi_shutdown(device_t dev) 754 { 755 756 GIANT_REQUIRED; 757 758 /* Allow children to shutdown first. */ 759 bus_generic_shutdown(dev); 760 761 /* 762 * Enable any GPEs that are able to power-on the system (i.e., RTC). 763 * Also, disable any that are not valid for this state (most). 764 */ 765 acpi_wake_prep_walk(ACPI_STATE_S5); 766 767 return (0); 768 } 769 770 /* 771 * Handle a new device being added 772 */ 773 static device_t 774 acpi_add_child(device_t bus, u_int order, const char *name, int unit) 775 { 776 struct acpi_device *ad; 777 device_t child; 778 779 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 780 return (NULL); 781 782 resource_list_init(&ad->ad_rl); 783 784 child = device_add_child_ordered(bus, order, name, unit); 785 if (child != NULL) 786 device_set_ivars(child, ad); 787 else 788 free(ad, M_ACPIDEV); 789 return (child); 790 } 791 792 static int 793 acpi_print_child(device_t bus, device_t child) 794 { 795 struct acpi_device *adev = device_get_ivars(child); 796 struct resource_list *rl = &adev->ad_rl; 797 int retval = 0; 798 799 retval += bus_print_child_header(bus, child); 800 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 801 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 802 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 803 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 804 if (device_get_flags(child)) 805 retval += printf(" flags %#x", device_get_flags(child)); 806 retval += bus_print_child_footer(bus, child); 807 808 return (retval); 809 } 810 811 /* 812 * If this device is an ACPI child but no one claimed it, attempt 813 * to power it off. We'll power it back up when a driver is added. 814 * 815 * XXX Disabled for now since many necessary devices (like fdc and 816 * ATA) don't claim the devices we created for them but still expect 817 * them to be powered up. 818 */ 819 static void 820 acpi_probe_nomatch(device_t bus, device_t child) 821 { 822 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 823 acpi_set_powerstate(child, ACPI_STATE_D3); 824 #endif 825 } 826 827 /* 828 * If a new driver has a chance to probe a child, first power it up. 829 * 830 * XXX Disabled for now (see acpi_probe_nomatch for details). 831 */ 832 static void 833 acpi_driver_added(device_t dev, driver_t *driver) 834 { 835 device_t child, *devlist; 836 int i, numdevs; 837 838 DEVICE_IDENTIFY(driver, dev); 839 if (device_get_children(dev, &devlist, &numdevs)) 840 return; 841 for (i = 0; i < numdevs; i++) { 842 child = devlist[i]; 843 if (device_get_state(child) == DS_NOTPRESENT) { 844 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 845 acpi_set_powerstate(child, ACPI_STATE_D0); 846 if (device_probe_and_attach(child) != 0) 847 acpi_set_powerstate(child, ACPI_STATE_D3); 848 #else 849 device_probe_and_attach(child); 850 #endif 851 } 852 } 853 free(devlist, M_TEMP); 854 } 855 856 /* Location hint for devctl(8) */ 857 static int 858 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 859 size_t buflen) 860 { 861 struct acpi_device *dinfo = device_get_ivars(child); 862 863 if (dinfo->ad_handle) 864 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 865 else 866 snprintf(buf, buflen, "unknown"); 867 return (0); 868 } 869 870 /* PnP information for devctl(8) */ 871 static int 872 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 873 size_t buflen) 874 { 875 struct acpi_device *dinfo = device_get_ivars(child); 876 ACPI_DEVICE_INFO *adinfo; 877 878 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 879 snprintf(buf, buflen, "unknown"); 880 return (0); 881 } 882 883 snprintf(buf, buflen, "_HID=%s _UID=%lu", 884 (adinfo->Valid & ACPI_VALID_HID) ? 885 adinfo->HardwareId.String : "none", 886 (adinfo->Valid & ACPI_VALID_UID) ? 887 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL); 888 AcpiOsFree(adinfo); 889 890 return (0); 891 } 892 893 /* 894 * Handle per-device ivars 895 */ 896 static int 897 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 898 { 899 struct acpi_device *ad; 900 901 if ((ad = device_get_ivars(child)) == NULL) { 902 device_printf(child, "device has no ivars\n"); 903 return (ENOENT); 904 } 905 906 /* ACPI and ISA compatibility ivars */ 907 switch(index) { 908 case ACPI_IVAR_HANDLE: 909 *(ACPI_HANDLE *)result = ad->ad_handle; 910 break; 911 case ACPI_IVAR_PRIVATE: 912 *(void **)result = ad->ad_private; 913 break; 914 case ACPI_IVAR_FLAGS: 915 *(int *)result = ad->ad_flags; 916 break; 917 case ISA_IVAR_VENDORID: 918 case ISA_IVAR_SERIAL: 919 case ISA_IVAR_COMPATID: 920 *(int *)result = -1; 921 break; 922 case ISA_IVAR_LOGICALID: 923 *(int *)result = acpi_isa_get_logicalid(child); 924 break; 925 default: 926 return (ENOENT); 927 } 928 929 return (0); 930 } 931 932 static int 933 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 934 { 935 struct acpi_device *ad; 936 937 if ((ad = device_get_ivars(child)) == NULL) { 938 device_printf(child, "device has no ivars\n"); 939 return (ENOENT); 940 } 941 942 switch(index) { 943 case ACPI_IVAR_HANDLE: 944 ad->ad_handle = (ACPI_HANDLE)value; 945 break; 946 case ACPI_IVAR_PRIVATE: 947 ad->ad_private = (void *)value; 948 break; 949 case ACPI_IVAR_FLAGS: 950 ad->ad_flags = (int)value; 951 break; 952 default: 953 panic("bad ivar write request (%d)", index); 954 return (ENOENT); 955 } 956 957 return (0); 958 } 959 960 /* 961 * Handle child resource allocation/removal 962 */ 963 static struct resource_list * 964 acpi_get_rlist(device_t dev, device_t child) 965 { 966 struct acpi_device *ad; 967 968 ad = device_get_ivars(child); 969 return (&ad->ad_rl); 970 } 971 972 static int 973 acpi_match_resource_hint(device_t dev, int type, long value) 974 { 975 struct acpi_device *ad = device_get_ivars(dev); 976 struct resource_list *rl = &ad->ad_rl; 977 struct resource_list_entry *rle; 978 979 STAILQ_FOREACH(rle, rl, link) { 980 if (rle->type != type) 981 continue; 982 if (rle->start <= value && rle->end >= value) 983 return (1); 984 } 985 return (0); 986 } 987 988 /* 989 * Wire device unit numbers based on resource matches in hints. 990 */ 991 static void 992 acpi_hint_device_unit(device_t acdev, device_t child, const char *name, 993 int *unitp) 994 { 995 const char *s; 996 long value; 997 int line, matches, unit; 998 999 /* 1000 * Iterate over all the hints for the devices with the specified 1001 * name to see if one's resources are a subset of this device. 1002 */ 1003 line = 0; 1004 for (;;) { 1005 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) 1006 break; 1007 1008 /* Must have an "at" for acpi or isa. */ 1009 resource_string_value(name, unit, "at", &s); 1010 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 || 1011 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0)) 1012 continue; 1013 1014 /* 1015 * Check for matching resources. We must have at least one match. 1016 * Since I/O and memory resources cannot be shared, if we get a 1017 * match on either of those, ignore any mismatches in IRQs or DRQs. 1018 * 1019 * XXX: We may want to revisit this to be more lenient and wire 1020 * as long as it gets one match. 1021 */ 1022 matches = 0; 1023 if (resource_long_value(name, unit, "port", &value) == 0) { 1024 /* 1025 * Floppy drive controllers are notorious for having a 1026 * wide variety of resources not all of which include the 1027 * first port that is specified by the hint (typically 1028 * 0x3f0) (see the comment above fdc_isa_alloc_resources() 1029 * in fdc_isa.c). However, they do all seem to include 1030 * port + 2 (e.g. 0x3f2) so for a floppy device, look for 1031 * 'value + 2' in the port resources instead of the hint 1032 * value. 1033 */ 1034 if (strcmp(name, "fdc") == 0) 1035 value += 2; 1036 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) 1037 matches++; 1038 else 1039 continue; 1040 } 1041 if (resource_long_value(name, unit, "maddr", &value) == 0) { 1042 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value)) 1043 matches++; 1044 else 1045 continue; 1046 } 1047 if (matches > 0) 1048 goto matched; 1049 if (resource_long_value(name, unit, "irq", &value) == 0) { 1050 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) 1051 matches++; 1052 else 1053 continue; 1054 } 1055 if (resource_long_value(name, unit, "drq", &value) == 0) { 1056 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value)) 1057 matches++; 1058 else 1059 continue; 1060 } 1061 1062 matched: 1063 if (matches > 0) { 1064 /* We have a winner! */ 1065 *unitp = unit; 1066 break; 1067 } 1068 } 1069 } 1070 1071 /* 1072 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1073 * duplicates, we merge any in the sysresource attach routine. 1074 */ 1075 static int 1076 acpi_sysres_alloc(device_t dev) 1077 { 1078 struct resource *res; 1079 struct resource_list *rl; 1080 struct resource_list_entry *rle; 1081 struct rman *rm; 1082 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1083 device_t *children; 1084 int child_count, i; 1085 1086 /* 1087 * Probe/attach any sysresource devices. This would be unnecessary if we 1088 * had multi-pass probe/attach. 1089 */ 1090 if (device_get_children(dev, &children, &child_count) != 0) 1091 return (ENXIO); 1092 for (i = 0; i < child_count; i++) { 1093 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1094 device_probe_and_attach(children[i]); 1095 } 1096 free(children, M_TEMP); 1097 1098 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1099 STAILQ_FOREACH(rle, rl, link) { 1100 if (rle->res != NULL) { 1101 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1102 continue; 1103 } 1104 1105 /* Only memory and IO resources are valid here. */ 1106 switch (rle->type) { 1107 case SYS_RES_IOPORT: 1108 rm = &acpi_rman_io; 1109 break; 1110 case SYS_RES_MEMORY: 1111 rm = &acpi_rman_mem; 1112 break; 1113 default: 1114 continue; 1115 } 1116 1117 /* Pre-allocate resource and add to our rman pool. */ 1118 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1119 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 1120 if (res != NULL) { 1121 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1122 rle->res = res; 1123 } else 1124 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1125 rle->start, rle->count, rle->type); 1126 } 1127 return (0); 1128 } 1129 1130 static char *pcilink_ids[] = { "PNP0C0F", NULL }; 1131 static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1132 1133 /* 1134 * Reserve declared resources for devices found during attach once system 1135 * resources have been allocated. 1136 */ 1137 static void 1138 acpi_reserve_resources(device_t dev) 1139 { 1140 struct resource_list_entry *rle; 1141 struct resource_list *rl; 1142 struct acpi_device *ad; 1143 struct acpi_softc *sc; 1144 device_t *children; 1145 int child_count, i; 1146 1147 sc = device_get_softc(dev); 1148 if (device_get_children(dev, &children, &child_count) != 0) 1149 return; 1150 for (i = 0; i < child_count; i++) { 1151 ad = device_get_ivars(children[i]); 1152 rl = &ad->ad_rl; 1153 1154 /* Don't reserve system resources. */ 1155 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1156 continue; 1157 1158 STAILQ_FOREACH(rle, rl, link) { 1159 /* 1160 * Don't reserve IRQ resources. There are many sticky things 1161 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET 1162 * when using legacy routing). 1163 */ 1164 if (rle->type == SYS_RES_IRQ) 1165 continue; 1166 1167 /* 1168 * Don't reserve the resource if it is already allocated. 1169 * The acpi_ec(4) driver can allocate its resources early 1170 * if ECDT is present. 1171 */ 1172 if (rle->res != NULL) 1173 continue; 1174 1175 /* 1176 * Try to reserve the resource from our parent. If this 1177 * fails because the resource is a system resource, just 1178 * let it be. The resource range is already reserved so 1179 * that other devices will not use it. If the driver 1180 * needs to allocate the resource, then 1181 * acpi_alloc_resource() will sub-alloc from the system 1182 * resource. 1183 */ 1184 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid, 1185 rle->start, rle->end, rle->count, 0); 1186 } 1187 } 1188 free(children, M_TEMP); 1189 sc->acpi_resources_reserved = 1; 1190 } 1191 1192 static int 1193 acpi_set_resource(device_t dev, device_t child, int type, int rid, 1194 u_long start, u_long count) 1195 { 1196 struct acpi_softc *sc = device_get_softc(dev); 1197 struct acpi_device *ad = device_get_ivars(child); 1198 struct resource_list *rl = &ad->ad_rl; 1199 u_long end; 1200 1201 /* Ignore IRQ resources for PCI link devices. */ 1202 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL) 1203 return (0); 1204 1205 /* If the resource is already allocated, fail. */ 1206 if (resource_list_busy(rl, type, rid)) 1207 return (EBUSY); 1208 1209 /* If the resource is already reserved, release it. */ 1210 if (resource_list_reserved(rl, type, rid)) 1211 resource_list_unreserve(rl, dev, child, type, rid); 1212 1213 /* Add the resource. */ 1214 end = (start + count - 1); 1215 resource_list_add(rl, type, rid, start, end, count); 1216 1217 /* Don't reserve resources until the system resources are allocated. */ 1218 if (!sc->acpi_resources_reserved) 1219 return (0); 1220 1221 /* Don't reserve system resources. */ 1222 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL) 1223 return (0); 1224 1225 /* 1226 * Don't reserve IRQ resources. There are many sticky things to 1227 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when 1228 * using legacy routing). 1229 */ 1230 if (type == SYS_RES_IRQ) 1231 return (0); 1232 1233 /* 1234 * Reserve the resource. 1235 * 1236 * XXX: Ignores failure for now. Failure here is probably a 1237 * BIOS/firmware bug? 1238 */ 1239 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0); 1240 return (0); 1241 } 1242 1243 static struct resource * 1244 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1245 u_long start, u_long end, u_long count, u_int flags) 1246 { 1247 ACPI_RESOURCE ares; 1248 struct acpi_device *ad; 1249 struct resource_list_entry *rle; 1250 struct resource_list *rl; 1251 struct resource *res; 1252 int isdefault = (start == 0UL && end == ~0UL); 1253 1254 /* 1255 * First attempt at allocating the resource. For direct children, 1256 * use resource_list_alloc() to handle reserved resources. For 1257 * other devices, pass the request up to our parent. 1258 */ 1259 if (bus == device_get_parent(child)) { 1260 ad = device_get_ivars(child); 1261 rl = &ad->ad_rl; 1262 1263 /* 1264 * Simulate the behavior of the ISA bus for direct children 1265 * devices. That is, if a non-default range is specified for 1266 * a resource that doesn't exist, use bus_set_resource() to 1267 * add the resource before allocating it. Note that these 1268 * resources will not be reserved. 1269 */ 1270 if (!isdefault && resource_list_find(rl, type, *rid) == NULL) 1271 resource_list_add(rl, type, *rid, start, end, count); 1272 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count, 1273 flags); 1274 if (res != NULL && type == SYS_RES_IRQ) { 1275 /* 1276 * Since bus_config_intr() takes immediate effect, we cannot 1277 * configure the interrupt associated with a device when we 1278 * parse the resources but have to defer it until a driver 1279 * actually allocates the interrupt via bus_alloc_resource(). 1280 * 1281 * XXX: Should we handle the lookup failing? 1282 */ 1283 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1284 acpi_config_intr(child, &ares); 1285 } 1286 1287 /* 1288 * If this is an allocation of the "default" range for a given 1289 * RID, fetch the exact bounds for this resource from the 1290 * resource list entry to try to allocate the range from the 1291 * system resource regions. 1292 */ 1293 if (res == NULL && isdefault) { 1294 rle = resource_list_find(rl, type, *rid); 1295 if (rle != NULL) { 1296 start = rle->start; 1297 end = rle->end; 1298 count = rle->count; 1299 } 1300 } 1301 } else 1302 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1303 start, end, count, flags); 1304 1305 /* 1306 * If the first attempt failed and this is an allocation of a 1307 * specific range, try to satisfy the request via a suballocation 1308 * from our system resource regions. 1309 */ 1310 if (res == NULL && start + count - 1 == end) 1311 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags); 1312 return (res); 1313 } 1314 1315 /* 1316 * Attempt to allocate a specific resource range from the system 1317 * resource ranges. Note that we only handle memory and I/O port 1318 * system resources. 1319 */ 1320 struct resource * 1321 acpi_alloc_sysres(device_t child, int type, int *rid, u_long start, u_long end, 1322 u_long count, u_int flags) 1323 { 1324 struct rman *rm; 1325 struct resource *res; 1326 1327 switch (type) { 1328 case SYS_RES_IOPORT: 1329 rm = &acpi_rman_io; 1330 break; 1331 case SYS_RES_MEMORY: 1332 rm = &acpi_rman_mem; 1333 break; 1334 default: 1335 return (NULL); 1336 } 1337 1338 KASSERT(start + count - 1 == end, ("wildcard resource range")); 1339 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1340 child); 1341 if (res == NULL) 1342 return (NULL); 1343 1344 rman_set_rid(res, *rid); 1345 1346 /* If requested, activate the resource using the parent's method. */ 1347 if (flags & RF_ACTIVE) 1348 if (bus_activate_resource(child, type, *rid, res) != 0) { 1349 rman_release_resource(res); 1350 return (NULL); 1351 } 1352 1353 return (res); 1354 } 1355 1356 static int 1357 acpi_is_resource_managed(int type, struct resource *r) 1358 { 1359 1360 /* We only handle memory and IO resources through rman. */ 1361 switch (type) { 1362 case SYS_RES_IOPORT: 1363 return (rman_is_region_manager(r, &acpi_rman_io)); 1364 case SYS_RES_MEMORY: 1365 return (rman_is_region_manager(r, &acpi_rman_mem)); 1366 } 1367 return (0); 1368 } 1369 1370 static int 1371 acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r, 1372 u_long start, u_long end) 1373 { 1374 1375 if (acpi_is_resource_managed(type, r)) 1376 return (rman_adjust_resource(r, start, end)); 1377 return (bus_generic_adjust_resource(bus, child, type, r, start, end)); 1378 } 1379 1380 static int 1381 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1382 struct resource *r) 1383 { 1384 int ret; 1385 1386 /* 1387 * If this resource belongs to one of our internal managers, 1388 * deactivate it and release it to the local pool. 1389 */ 1390 if (acpi_is_resource_managed(type, r)) { 1391 if (rman_get_flags(r) & RF_ACTIVE) { 1392 ret = bus_deactivate_resource(child, type, rid, r); 1393 if (ret != 0) 1394 return (ret); 1395 } 1396 return (rman_release_resource(r)); 1397 } 1398 1399 return (bus_generic_rl_release_resource(bus, child, type, rid, r)); 1400 } 1401 1402 static void 1403 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1404 { 1405 struct resource_list *rl; 1406 1407 rl = acpi_get_rlist(bus, child); 1408 if (resource_list_busy(rl, type, rid)) { 1409 device_printf(bus, "delete_resource: Resource still owned by child" 1410 " (type=%d, rid=%d)\n", type, rid); 1411 return; 1412 } 1413 resource_list_unreserve(rl, bus, child, type, rid); 1414 resource_list_delete(rl, type, rid); 1415 } 1416 1417 /* Allocate an IO port or memory resource, given its GAS. */ 1418 int 1419 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1420 struct resource **res, u_int flags) 1421 { 1422 int error, res_type; 1423 1424 error = ENOMEM; 1425 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1426 return (EINVAL); 1427 1428 /* We only support memory and IO spaces. */ 1429 switch (gas->SpaceId) { 1430 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1431 res_type = SYS_RES_MEMORY; 1432 break; 1433 case ACPI_ADR_SPACE_SYSTEM_IO: 1434 res_type = SYS_RES_IOPORT; 1435 break; 1436 default: 1437 return (EOPNOTSUPP); 1438 } 1439 1440 /* 1441 * If the register width is less than 8, assume the BIOS author means 1442 * it is a bit field and just allocate a byte. 1443 */ 1444 if (gas->BitWidth && gas->BitWidth < 8) 1445 gas->BitWidth = 8; 1446 1447 /* Validate the address after we're sure we support the space. */ 1448 if (gas->Address == 0 || gas->BitWidth == 0) 1449 return (EINVAL); 1450 1451 bus_set_resource(dev, res_type, *rid, gas->Address, 1452 gas->BitWidth / 8); 1453 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1454 if (*res != NULL) { 1455 *type = res_type; 1456 error = 0; 1457 } else 1458 bus_delete_resource(dev, res_type, *rid); 1459 1460 return (error); 1461 } 1462 1463 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1464 static uint32_t 1465 acpi_isa_get_logicalid(device_t dev) 1466 { 1467 ACPI_DEVICE_INFO *devinfo; 1468 ACPI_HANDLE h; 1469 uint32_t pnpid; 1470 1471 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1472 1473 /* Fetch and validate the HID. */ 1474 if ((h = acpi_get_handle(dev)) == NULL || 1475 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1476 return_VALUE (0); 1477 1478 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 && 1479 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ? 1480 PNP_EISAID(devinfo->HardwareId.String) : 0; 1481 AcpiOsFree(devinfo); 1482 1483 return_VALUE (pnpid); 1484 } 1485 1486 static int 1487 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1488 { 1489 ACPI_DEVICE_INFO *devinfo; 1490 ACPI_DEVICE_ID *ids; 1491 ACPI_HANDLE h; 1492 uint32_t *pnpid; 1493 int i, valid; 1494 1495 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1496 1497 pnpid = cids; 1498 1499 /* Fetch and validate the CID */ 1500 if ((h = acpi_get_handle(dev)) == NULL || 1501 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1502 return_VALUE (0); 1503 1504 if ((devinfo->Valid & ACPI_VALID_CID) == 0) { 1505 AcpiOsFree(devinfo); 1506 return_VALUE (0); 1507 } 1508 1509 if (devinfo->CompatibleIdList.Count < count) 1510 count = devinfo->CompatibleIdList.Count; 1511 ids = devinfo->CompatibleIdList.Ids; 1512 for (i = 0, valid = 0; i < count; i++) 1513 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE && 1514 strncmp(ids[i].String, "PNP", 3) == 0) { 1515 *pnpid++ = PNP_EISAID(ids[i].String); 1516 valid++; 1517 } 1518 AcpiOsFree(devinfo); 1519 1520 return_VALUE (valid); 1521 } 1522 1523 static char * 1524 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1525 { 1526 ACPI_HANDLE h; 1527 ACPI_OBJECT_TYPE t; 1528 int i; 1529 1530 h = acpi_get_handle(dev); 1531 if (ids == NULL || h == NULL) 1532 return (NULL); 1533 t = acpi_get_type(dev); 1534 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR) 1535 return (NULL); 1536 1537 /* Try to match one of the array of IDs with a HID or CID. */ 1538 for (i = 0; ids[i] != NULL; i++) { 1539 if (acpi_MatchHid(h, ids[i])) 1540 return (ids[i]); 1541 } 1542 return (NULL); 1543 } 1544 1545 static ACPI_STATUS 1546 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1547 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1548 { 1549 ACPI_HANDLE h; 1550 1551 if (dev == NULL) 1552 h = ACPI_ROOT_OBJECT; 1553 else if ((h = acpi_get_handle(dev)) == NULL) 1554 return (AE_BAD_PARAMETER); 1555 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1556 } 1557 1558 int 1559 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1560 { 1561 struct acpi_softc *sc; 1562 ACPI_HANDLE handle; 1563 ACPI_STATUS status; 1564 char sxd[8]; 1565 1566 handle = acpi_get_handle(dev); 1567 1568 /* 1569 * XXX If we find these devices, don't try to power them down. 1570 * The serial and IRDA ports on my T23 hang the system when 1571 * set to D3 and it appears that such legacy devices may 1572 * need special handling in their drivers. 1573 */ 1574 if (dstate == NULL || handle == NULL || 1575 acpi_MatchHid(handle, "PNP0500") || 1576 acpi_MatchHid(handle, "PNP0501") || 1577 acpi_MatchHid(handle, "PNP0502") || 1578 acpi_MatchHid(handle, "PNP0510") || 1579 acpi_MatchHid(handle, "PNP0511")) 1580 return (ENXIO); 1581 1582 /* 1583 * Override next state with the value from _SxD, if present. 1584 * Note illegal _S0D is evaluated because some systems expect this. 1585 */ 1586 sc = device_get_softc(bus); 1587 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1588 status = acpi_GetInteger(handle, sxd, dstate); 1589 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 1590 device_printf(dev, "failed to get %s on %s: %s\n", sxd, 1591 acpi_name(handle), AcpiFormatException(status)); 1592 return (ENXIO); 1593 } 1594 1595 return (0); 1596 } 1597 1598 /* Callback arg for our implementation of walking the namespace. */ 1599 struct acpi_device_scan_ctx { 1600 acpi_scan_cb_t user_fn; 1601 void *arg; 1602 ACPI_HANDLE parent; 1603 }; 1604 1605 static ACPI_STATUS 1606 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1607 { 1608 struct acpi_device_scan_ctx *ctx; 1609 device_t dev, old_dev; 1610 ACPI_STATUS status; 1611 ACPI_OBJECT_TYPE type; 1612 1613 /* 1614 * Skip this device if we think we'll have trouble with it or it is 1615 * the parent where the scan began. 1616 */ 1617 ctx = (struct acpi_device_scan_ctx *)arg; 1618 if (acpi_avoid(h) || h == ctx->parent) 1619 return (AE_OK); 1620 1621 /* If this is not a valid device type (e.g., a method), skip it. */ 1622 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1623 return (AE_OK); 1624 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1625 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1626 return (AE_OK); 1627 1628 /* 1629 * Call the user function with the current device. If it is unchanged 1630 * afterwards, return. Otherwise, we update the handle to the new dev. 1631 */ 1632 old_dev = acpi_get_device(h); 1633 dev = old_dev; 1634 status = ctx->user_fn(h, &dev, level, ctx->arg); 1635 if (ACPI_FAILURE(status) || old_dev == dev) 1636 return (status); 1637 1638 /* Remove the old child and its connection to the handle. */ 1639 if (old_dev != NULL) { 1640 device_delete_child(device_get_parent(old_dev), old_dev); 1641 AcpiDetachData(h, acpi_fake_objhandler); 1642 } 1643 1644 /* Recreate the handle association if the user created a device. */ 1645 if (dev != NULL) 1646 AcpiAttachData(h, acpi_fake_objhandler, dev); 1647 1648 return (AE_OK); 1649 } 1650 1651 static ACPI_STATUS 1652 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1653 acpi_scan_cb_t user_fn, void *arg) 1654 { 1655 ACPI_HANDLE h; 1656 struct acpi_device_scan_ctx ctx; 1657 1658 if (acpi_disabled("children")) 1659 return (AE_OK); 1660 1661 if (dev == NULL) 1662 h = ACPI_ROOT_OBJECT; 1663 else if ((h = acpi_get_handle(dev)) == NULL) 1664 return (AE_BAD_PARAMETER); 1665 ctx.user_fn = user_fn; 1666 ctx.arg = arg; 1667 ctx.parent = h; 1668 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1669 acpi_device_scan_cb, NULL, &ctx, NULL)); 1670 } 1671 1672 /* 1673 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1674 * device power states since it's close enough to ACPI. 1675 */ 1676 static int 1677 acpi_set_powerstate(device_t child, int state) 1678 { 1679 ACPI_HANDLE h; 1680 ACPI_STATUS status; 1681 1682 h = acpi_get_handle(child); 1683 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) 1684 return (EINVAL); 1685 if (h == NULL) 1686 return (0); 1687 1688 /* Ignore errors if the power methods aren't present. */ 1689 status = acpi_pwr_switch_consumer(h, state); 1690 if (ACPI_SUCCESS(status)) { 1691 if (bootverbose) 1692 device_printf(child, "set ACPI power state D%d on %s\n", 1693 state, acpi_name(h)); 1694 } else if (status != AE_NOT_FOUND) 1695 device_printf(child, 1696 "failed to set ACPI power state D%d on %s: %s\n", state, 1697 acpi_name(h), AcpiFormatException(status)); 1698 1699 return (0); 1700 } 1701 1702 static int 1703 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1704 { 1705 int result, cid_count, i; 1706 uint32_t lid, cids[8]; 1707 1708 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1709 1710 /* 1711 * ISA-style drivers attached to ACPI may persist and 1712 * probe manually if we return ENOENT. We never want 1713 * that to happen, so don't ever return it. 1714 */ 1715 result = ENXIO; 1716 1717 /* Scan the supplied IDs for a match */ 1718 lid = acpi_isa_get_logicalid(child); 1719 cid_count = acpi_isa_get_compatid(child, cids, 8); 1720 while (ids && ids->ip_id) { 1721 if (lid == ids->ip_id) { 1722 result = 0; 1723 goto out; 1724 } 1725 for (i = 0; i < cid_count; i++) { 1726 if (cids[i] == ids->ip_id) { 1727 result = 0; 1728 goto out; 1729 } 1730 } 1731 ids++; 1732 } 1733 1734 out: 1735 if (result == 0 && ids->ip_desc) 1736 device_set_desc(child, ids->ip_desc); 1737 1738 return_VALUE (result); 1739 } 1740 1741 #if defined(__i386__) || defined(__amd64__) 1742 /* 1743 * Look for a MCFG table. If it is present, use the settings for 1744 * domain (segment) 0 to setup PCI config space access via the memory 1745 * map. 1746 */ 1747 static void 1748 acpi_enable_pcie(void) 1749 { 1750 ACPI_TABLE_HEADER *hdr; 1751 ACPI_MCFG_ALLOCATION *alloc, *end; 1752 ACPI_STATUS status; 1753 1754 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1755 if (ACPI_FAILURE(status)) 1756 return; 1757 1758 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1759 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1760 while (alloc < end) { 1761 if (alloc->PciSegment == 0) { 1762 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1763 alloc->EndBusNumber); 1764 return; 1765 } 1766 alloc++; 1767 } 1768 } 1769 #endif 1770 1771 /* 1772 * Scan all of the ACPI namespace and attach child devices. 1773 * 1774 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1775 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1776 * However, in violation of the spec, some systems place their PCI link 1777 * devices in \, so we have to walk the whole namespace. We check the 1778 * type of namespace nodes, so this should be ok. 1779 */ 1780 static void 1781 acpi_probe_children(device_t bus) 1782 { 1783 1784 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1785 1786 /* 1787 * Scan the namespace and insert placeholders for all the devices that 1788 * we find. We also probe/attach any early devices. 1789 * 1790 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1791 * we want to create nodes for all devices, not just those that are 1792 * currently present. (This assumes that we don't want to create/remove 1793 * devices as they appear, which might be smarter.) 1794 */ 1795 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1796 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1797 NULL, bus, NULL); 1798 1799 /* Pre-allocate resources for our rman from any sysresource devices. */ 1800 acpi_sysres_alloc(bus); 1801 1802 /* Reserve resources already allocated to children. */ 1803 acpi_reserve_resources(bus); 1804 1805 /* Create any static children by calling device identify methods. */ 1806 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1807 bus_generic_probe(bus); 1808 1809 /* Probe/attach all children, created statically and from the namespace. */ 1810 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n")); 1811 bus_generic_attach(bus); 1812 1813 /* Attach wake sysctls. */ 1814 acpi_wake_sysctl_walk(bus); 1815 1816 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1817 return_VOID; 1818 } 1819 1820 /* 1821 * Determine the probe order for a given device. 1822 */ 1823 static void 1824 acpi_probe_order(ACPI_HANDLE handle, int *order) 1825 { 1826 ACPI_OBJECT_TYPE type; 1827 1828 /* 1829 * 0. CPUs 1830 * 1. I/O port and memory system resource holders 1831 * 2. Clocks and timers (to handle early accesses) 1832 * 3. Embedded controllers (to handle early accesses) 1833 * 4. PCI Link Devices 1834 */ 1835 AcpiGetType(handle, &type); 1836 if (type == ACPI_TYPE_PROCESSOR) 1837 *order = 0; 1838 else if (acpi_MatchHid(handle, "PNP0C01") || 1839 acpi_MatchHid(handle, "PNP0C02")) 1840 *order = 1; 1841 else if (acpi_MatchHid(handle, "PNP0100") || 1842 acpi_MatchHid(handle, "PNP0103") || 1843 acpi_MatchHid(handle, "PNP0B00")) 1844 *order = 2; 1845 else if (acpi_MatchHid(handle, "PNP0C09")) 1846 *order = 3; 1847 else if (acpi_MatchHid(handle, "PNP0C0F")) 1848 *order = 4; 1849 } 1850 1851 /* 1852 * Evaluate a child device and determine whether we might attach a device to 1853 * it. 1854 */ 1855 static ACPI_STATUS 1856 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1857 { 1858 struct acpi_prw_data prw; 1859 ACPI_OBJECT_TYPE type; 1860 ACPI_HANDLE h; 1861 device_t bus, child; 1862 char *handle_str; 1863 int order; 1864 1865 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1866 1867 if (acpi_disabled("children")) 1868 return_ACPI_STATUS (AE_OK); 1869 1870 /* Skip this device if we think we'll have trouble with it. */ 1871 if (acpi_avoid(handle)) 1872 return_ACPI_STATUS (AE_OK); 1873 1874 bus = (device_t)context; 1875 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1876 handle_str = acpi_name(handle); 1877 switch (type) { 1878 case ACPI_TYPE_DEVICE: 1879 /* 1880 * Since we scan from \, be sure to skip system scope objects. 1881 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1882 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1883 * during the intialization and \_TZ_ is to support Notify() on it. 1884 */ 1885 if (strcmp(handle_str, "\\_SB_") == 0 || 1886 strcmp(handle_str, "\\_TZ_") == 0) 1887 break; 1888 if (acpi_parse_prw(handle, &prw) == 0) 1889 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1890 1891 /* 1892 * Ignore devices that do not have a _HID or _CID. They should 1893 * be discovered by other buses (e.g. the PCI bus driver). 1894 */ 1895 if (!acpi_has_hid(handle)) 1896 break; 1897 /* FALLTHROUGH */ 1898 case ACPI_TYPE_PROCESSOR: 1899 case ACPI_TYPE_THERMAL: 1900 case ACPI_TYPE_POWER: 1901 /* 1902 * Create a placeholder device for this node. Sort the 1903 * placeholder so that the probe/attach passes will run 1904 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1905 * are reserved for special objects (i.e., system 1906 * resources). 1907 */ 1908 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1909 order = level * 10 + ACPI_DEV_BASE_ORDER; 1910 acpi_probe_order(handle, &order); 1911 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1912 if (child == NULL) 1913 break; 1914 1915 /* Associate the handle with the device_t and vice versa. */ 1916 acpi_set_handle(child, handle); 1917 AcpiAttachData(handle, acpi_fake_objhandler, child); 1918 1919 /* 1920 * Check that the device is present. If it's not present, 1921 * leave it disabled (so that we have a device_t attached to 1922 * the handle, but we don't probe it). 1923 * 1924 * XXX PCI link devices sometimes report "present" but not 1925 * "functional" (i.e. if disabled). Go ahead and probe them 1926 * anyway since we may enable them later. 1927 */ 1928 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1929 /* Never disable PCI link devices. */ 1930 if (acpi_MatchHid(handle, "PNP0C0F")) 1931 break; 1932 /* 1933 * Docking stations should remain enabled since the system 1934 * may be undocked at boot. 1935 */ 1936 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1937 break; 1938 1939 device_disable(child); 1940 break; 1941 } 1942 1943 /* 1944 * Get the device's resource settings and attach them. 1945 * Note that if the device has _PRS but no _CRS, we need 1946 * to decide when it's appropriate to try to configure the 1947 * device. Ignore the return value here; it's OK for the 1948 * device not to have any resources. 1949 */ 1950 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1951 break; 1952 } 1953 } 1954 1955 return_ACPI_STATUS (AE_OK); 1956 } 1957 1958 /* 1959 * AcpiAttachData() requires an object handler but never uses it. This is a 1960 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1961 */ 1962 void 1963 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1964 { 1965 } 1966 1967 static void 1968 acpi_shutdown_final(void *arg, int howto) 1969 { 1970 struct acpi_softc *sc = (struct acpi_softc *)arg; 1971 register_t intr; 1972 ACPI_STATUS status; 1973 1974 /* 1975 * XXX Shutdown code should only run on the BSP (cpuid 0). 1976 * Some chipsets do not power off the system correctly if called from 1977 * an AP. 1978 */ 1979 if ((howto & RB_POWEROFF) != 0) { 1980 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1981 if (ACPI_FAILURE(status)) { 1982 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1983 AcpiFormatException(status)); 1984 return; 1985 } 1986 device_printf(sc->acpi_dev, "Powering system off\n"); 1987 intr = intr_disable(); 1988 status = AcpiEnterSleepState(ACPI_STATE_S5, acpi_sleep_flags); 1989 if (ACPI_FAILURE(status)) { 1990 intr_restore(intr); 1991 device_printf(sc->acpi_dev, "power-off failed - %s\n", 1992 AcpiFormatException(status)); 1993 } else { 1994 DELAY(1000000); 1995 intr_restore(intr); 1996 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 1997 } 1998 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 1999 /* Reboot using the reset register. */ 2000 status = AcpiReset(); 2001 if (ACPI_SUCCESS(status)) { 2002 DELAY(1000000); 2003 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 2004 } else if (status != AE_NOT_EXIST) 2005 device_printf(sc->acpi_dev, "reset failed - %s\n", 2006 AcpiFormatException(status)); 2007 } else if (sc->acpi_do_disable && panicstr == NULL) { 2008 /* 2009 * Only disable ACPI if the user requested. On some systems, writing 2010 * the disable value to SMI_CMD hangs the system. 2011 */ 2012 device_printf(sc->acpi_dev, "Shutting down\n"); 2013 AcpiTerminate(); 2014 } 2015 } 2016 2017 static void 2018 acpi_enable_fixed_events(struct acpi_softc *sc) 2019 { 2020 static int first_time = 1; 2021 2022 /* Enable and clear fixed events and install handlers. */ 2023 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 2024 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2025 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 2026 acpi_event_power_button_sleep, sc); 2027 if (first_time) 2028 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 2029 } 2030 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 2031 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 2032 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 2033 acpi_event_sleep_button_sleep, sc); 2034 if (first_time) 2035 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 2036 } 2037 2038 first_time = 0; 2039 } 2040 2041 /* 2042 * Returns true if the device is actually present and should 2043 * be attached to. This requires the present, enabled, UI-visible 2044 * and diagnostics-passed bits to be set. 2045 */ 2046 BOOLEAN 2047 acpi_DeviceIsPresent(device_t dev) 2048 { 2049 ACPI_DEVICE_INFO *devinfo; 2050 ACPI_HANDLE h; 2051 BOOLEAN present; 2052 2053 if ((h = acpi_get_handle(dev)) == NULL || 2054 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2055 return (FALSE); 2056 2057 /* If no _STA method, must be present */ 2058 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2059 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2060 2061 AcpiOsFree(devinfo); 2062 return (present); 2063 } 2064 2065 /* 2066 * Returns true if the battery is actually present and inserted. 2067 */ 2068 BOOLEAN 2069 acpi_BatteryIsPresent(device_t dev) 2070 { 2071 ACPI_DEVICE_INFO *devinfo; 2072 ACPI_HANDLE h; 2073 BOOLEAN present; 2074 2075 if ((h = acpi_get_handle(dev)) == NULL || 2076 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2077 return (FALSE); 2078 2079 /* If no _STA method, must be present */ 2080 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2081 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2082 2083 AcpiOsFree(devinfo); 2084 return (present); 2085 } 2086 2087 /* 2088 * Returns true if a device has at least one valid device ID. 2089 */ 2090 static BOOLEAN 2091 acpi_has_hid(ACPI_HANDLE h) 2092 { 2093 ACPI_DEVICE_INFO *devinfo; 2094 BOOLEAN ret; 2095 2096 if (h == NULL || 2097 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2098 return (FALSE); 2099 2100 ret = FALSE; 2101 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 2102 ret = TRUE; 2103 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2104 if (devinfo->CompatibleIdList.Count > 0) 2105 ret = TRUE; 2106 2107 AcpiOsFree(devinfo); 2108 return (ret); 2109 } 2110 2111 /* 2112 * Match a HID string against a handle 2113 */ 2114 BOOLEAN 2115 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 2116 { 2117 ACPI_DEVICE_INFO *devinfo; 2118 BOOLEAN ret; 2119 int i; 2120 2121 if (hid == NULL || h == NULL || 2122 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2123 return (FALSE); 2124 2125 ret = FALSE; 2126 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 2127 strcmp(hid, devinfo->HardwareId.String) == 0) 2128 ret = TRUE; 2129 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2130 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 2131 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 2132 ret = TRUE; 2133 break; 2134 } 2135 } 2136 2137 AcpiOsFree(devinfo); 2138 return (ret); 2139 } 2140 2141 /* 2142 * Return the handle of a named object within our scope, ie. that of (parent) 2143 * or one if its parents. 2144 */ 2145 ACPI_STATUS 2146 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2147 { 2148 ACPI_HANDLE r; 2149 ACPI_STATUS status; 2150 2151 /* Walk back up the tree to the root */ 2152 for (;;) { 2153 status = AcpiGetHandle(parent, path, &r); 2154 if (ACPI_SUCCESS(status)) { 2155 *result = r; 2156 return (AE_OK); 2157 } 2158 /* XXX Return error here? */ 2159 if (status != AE_NOT_FOUND) 2160 return (AE_OK); 2161 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2162 return (AE_NOT_FOUND); 2163 parent = r; 2164 } 2165 } 2166 2167 /* 2168 * Allocate a buffer with a preset data size. 2169 */ 2170 ACPI_BUFFER * 2171 acpi_AllocBuffer(int size) 2172 { 2173 ACPI_BUFFER *buf; 2174 2175 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2176 return (NULL); 2177 buf->Length = size; 2178 buf->Pointer = (void *)(buf + 1); 2179 return (buf); 2180 } 2181 2182 ACPI_STATUS 2183 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2184 { 2185 ACPI_OBJECT arg1; 2186 ACPI_OBJECT_LIST args; 2187 2188 arg1.Type = ACPI_TYPE_INTEGER; 2189 arg1.Integer.Value = number; 2190 args.Count = 1; 2191 args.Pointer = &arg1; 2192 2193 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2194 } 2195 2196 /* 2197 * Evaluate a path that should return an integer. 2198 */ 2199 ACPI_STATUS 2200 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2201 { 2202 ACPI_STATUS status; 2203 ACPI_BUFFER buf; 2204 ACPI_OBJECT param; 2205 2206 if (handle == NULL) 2207 handle = ACPI_ROOT_OBJECT; 2208 2209 /* 2210 * Assume that what we've been pointed at is an Integer object, or 2211 * a method that will return an Integer. 2212 */ 2213 buf.Pointer = ¶m; 2214 buf.Length = sizeof(param); 2215 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2216 if (ACPI_SUCCESS(status)) { 2217 if (param.Type == ACPI_TYPE_INTEGER) 2218 *number = param.Integer.Value; 2219 else 2220 status = AE_TYPE; 2221 } 2222 2223 /* 2224 * In some applications, a method that's expected to return an Integer 2225 * may instead return a Buffer (probably to simplify some internal 2226 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2227 * convert it into an Integer as best we can. 2228 * 2229 * This is a hack. 2230 */ 2231 if (status == AE_BUFFER_OVERFLOW) { 2232 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2233 status = AE_NO_MEMORY; 2234 } else { 2235 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2236 if (ACPI_SUCCESS(status)) 2237 status = acpi_ConvertBufferToInteger(&buf, number); 2238 AcpiOsFree(buf.Pointer); 2239 } 2240 } 2241 return (status); 2242 } 2243 2244 ACPI_STATUS 2245 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2246 { 2247 ACPI_OBJECT *p; 2248 UINT8 *val; 2249 int i; 2250 2251 p = (ACPI_OBJECT *)bufp->Pointer; 2252 if (p->Type == ACPI_TYPE_INTEGER) { 2253 *number = p->Integer.Value; 2254 return (AE_OK); 2255 } 2256 if (p->Type != ACPI_TYPE_BUFFER) 2257 return (AE_TYPE); 2258 if (p->Buffer.Length > sizeof(int)) 2259 return (AE_BAD_DATA); 2260 2261 *number = 0; 2262 val = p->Buffer.Pointer; 2263 for (i = 0; i < p->Buffer.Length; i++) 2264 *number += val[i] << (i * 8); 2265 return (AE_OK); 2266 } 2267 2268 /* 2269 * Iterate over the elements of an a package object, calling the supplied 2270 * function for each element. 2271 * 2272 * XXX possible enhancement might be to abort traversal on error. 2273 */ 2274 ACPI_STATUS 2275 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2276 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2277 { 2278 ACPI_OBJECT *comp; 2279 int i; 2280 2281 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2282 return (AE_BAD_PARAMETER); 2283 2284 /* Iterate over components */ 2285 i = 0; 2286 comp = pkg->Package.Elements; 2287 for (; i < pkg->Package.Count; i++, comp++) 2288 func(comp, arg); 2289 2290 return (AE_OK); 2291 } 2292 2293 /* 2294 * Find the (index)th resource object in a set. 2295 */ 2296 ACPI_STATUS 2297 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2298 { 2299 ACPI_RESOURCE *rp; 2300 int i; 2301 2302 rp = (ACPI_RESOURCE *)buf->Pointer; 2303 i = index; 2304 while (i-- > 0) { 2305 /* Range check */ 2306 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2307 return (AE_BAD_PARAMETER); 2308 2309 /* Check for terminator */ 2310 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2311 return (AE_NOT_FOUND); 2312 rp = ACPI_NEXT_RESOURCE(rp); 2313 } 2314 if (resp != NULL) 2315 *resp = rp; 2316 2317 return (AE_OK); 2318 } 2319 2320 /* 2321 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2322 * 2323 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2324 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2325 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2326 * resources. 2327 */ 2328 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2329 2330 ACPI_STATUS 2331 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2332 { 2333 ACPI_RESOURCE *rp; 2334 void *newp; 2335 2336 /* Initialise the buffer if necessary. */ 2337 if (buf->Pointer == NULL) { 2338 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2339 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2340 return (AE_NO_MEMORY); 2341 rp = (ACPI_RESOURCE *)buf->Pointer; 2342 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2343 rp->Length = 0; 2344 } 2345 if (res == NULL) 2346 return (AE_OK); 2347 2348 /* 2349 * Scan the current buffer looking for the terminator. 2350 * This will either find the terminator or hit the end 2351 * of the buffer and return an error. 2352 */ 2353 rp = (ACPI_RESOURCE *)buf->Pointer; 2354 for (;;) { 2355 /* Range check, don't go outside the buffer */ 2356 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2357 return (AE_BAD_PARAMETER); 2358 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2359 break; 2360 rp = ACPI_NEXT_RESOURCE(rp); 2361 } 2362 2363 /* 2364 * Check the size of the buffer and expand if required. 2365 * 2366 * Required size is: 2367 * size of existing resources before terminator + 2368 * size of new resource and header + 2369 * size of terminator. 2370 * 2371 * Note that this loop should really only run once, unless 2372 * for some reason we are stuffing a *really* huge resource. 2373 */ 2374 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2375 res->Length + ACPI_RS_SIZE_NO_DATA + 2376 ACPI_RS_SIZE_MIN) >= buf->Length) { 2377 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2378 return (AE_NO_MEMORY); 2379 bcopy(buf->Pointer, newp, buf->Length); 2380 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2381 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2382 AcpiOsFree(buf->Pointer); 2383 buf->Pointer = newp; 2384 buf->Length += buf->Length; 2385 } 2386 2387 /* Insert the new resource. */ 2388 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2389 2390 /* And add the terminator. */ 2391 rp = ACPI_NEXT_RESOURCE(rp); 2392 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2393 rp->Length = 0; 2394 2395 return (AE_OK); 2396 } 2397 2398 /* 2399 * Set interrupt model. 2400 */ 2401 ACPI_STATUS 2402 acpi_SetIntrModel(int model) 2403 { 2404 2405 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2406 } 2407 2408 /* 2409 * Walk subtables of a table and call a callback routine for each 2410 * subtable. The caller should provide the first subtable and a 2411 * pointer to the end of the table. This can be used to walk tables 2412 * such as MADT and SRAT that use subtable entries. 2413 */ 2414 void 2415 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler, 2416 void *arg) 2417 { 2418 ACPI_SUBTABLE_HEADER *entry; 2419 2420 for (entry = first; (void *)entry < end; ) { 2421 /* Avoid an infinite loop if we hit a bogus entry. */ 2422 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER)) 2423 return; 2424 2425 handler(entry, arg); 2426 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length); 2427 } 2428 } 2429 2430 /* 2431 * DEPRECATED. This interface has serious deficiencies and will be 2432 * removed. 2433 * 2434 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2435 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2436 */ 2437 ACPI_STATUS 2438 acpi_SetSleepState(struct acpi_softc *sc, int state) 2439 { 2440 static int once; 2441 2442 if (!once) { 2443 device_printf(sc->acpi_dev, 2444 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2445 once = 1; 2446 } 2447 return (acpi_EnterSleepState(sc, state)); 2448 } 2449 2450 #if defined(__amd64__) || defined(__i386__) 2451 static void 2452 acpi_sleep_force_task(void *context) 2453 { 2454 struct acpi_softc *sc = (struct acpi_softc *)context; 2455 2456 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2457 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2458 sc->acpi_next_sstate); 2459 } 2460 2461 static void 2462 acpi_sleep_force(void *arg) 2463 { 2464 struct acpi_softc *sc = (struct acpi_softc *)arg; 2465 2466 device_printf(sc->acpi_dev, 2467 "suspend request timed out, forcing sleep now\n"); 2468 /* 2469 * XXX Suspending from callout cause the freeze in DEVICE_SUSPEND(). 2470 * Suspend from acpi_task thread in stead. 2471 */ 2472 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 2473 acpi_sleep_force_task, sc))) 2474 device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n"); 2475 } 2476 #endif 2477 2478 /* 2479 * Request that the system enter the given suspend state. All /dev/apm 2480 * devices and devd(8) will be notified. Userland then has a chance to 2481 * save state and acknowledge the request. The system sleeps once all 2482 * acks are in. 2483 */ 2484 int 2485 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2486 { 2487 #if defined(__amd64__) || defined(__i386__) 2488 struct apm_clone_data *clone; 2489 ACPI_STATUS status; 2490 2491 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2492 return (EINVAL); 2493 if (!acpi_sleep_states[state]) 2494 return (EOPNOTSUPP); 2495 2496 /* If a suspend request is already in progress, just return. */ 2497 if (sc->acpi_next_sstate != 0) { 2498 return (0); 2499 } 2500 2501 /* Wait until sleep is enabled. */ 2502 while (sc->acpi_sleep_disabled) { 2503 AcpiOsSleep(1000); 2504 } 2505 2506 ACPI_LOCK(acpi); 2507 2508 sc->acpi_next_sstate = state; 2509 2510 /* S5 (soft-off) should be entered directly with no waiting. */ 2511 if (state == ACPI_STATE_S5) { 2512 ACPI_UNLOCK(acpi); 2513 status = acpi_EnterSleepState(sc, state); 2514 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2515 } 2516 2517 /* Record the pending state and notify all apm devices. */ 2518 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2519 clone->notify_status = APM_EV_NONE; 2520 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2521 selwakeuppri(&clone->sel_read, PZERO); 2522 KNOTE_LOCKED(&clone->sel_read.si_note, 0); 2523 } 2524 } 2525 2526 /* If devd(8) is not running, immediately enter the sleep state. */ 2527 if (!devctl_process_running()) { 2528 ACPI_UNLOCK(acpi); 2529 status = acpi_EnterSleepState(sc, state); 2530 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2531 } 2532 2533 /* 2534 * Set a timeout to fire if userland doesn't ack the suspend request 2535 * in time. This way we still eventually go to sleep if we were 2536 * overheating or running low on battery, even if userland is hung. 2537 * We cancel this timeout once all userland acks are in or the 2538 * suspend request is aborted. 2539 */ 2540 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2541 ACPI_UNLOCK(acpi); 2542 2543 /* Now notify devd(8) also. */ 2544 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2545 2546 return (0); 2547 #else 2548 /* This platform does not support acpi suspend/resume. */ 2549 return (EOPNOTSUPP); 2550 #endif 2551 } 2552 2553 /* 2554 * Acknowledge (or reject) a pending sleep state. The caller has 2555 * prepared for suspend and is now ready for it to proceed. If the 2556 * error argument is non-zero, it indicates suspend should be cancelled 2557 * and gives an errno value describing why. Once all votes are in, 2558 * we suspend the system. 2559 */ 2560 int 2561 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2562 { 2563 #if defined(__amd64__) || defined(__i386__) 2564 struct acpi_softc *sc; 2565 int ret, sleeping; 2566 2567 /* If no pending sleep state, return an error. */ 2568 ACPI_LOCK(acpi); 2569 sc = clone->acpi_sc; 2570 if (sc->acpi_next_sstate == 0) { 2571 ACPI_UNLOCK(acpi); 2572 return (ENXIO); 2573 } 2574 2575 /* Caller wants to abort suspend process. */ 2576 if (error) { 2577 sc->acpi_next_sstate = 0; 2578 callout_stop(&sc->susp_force_to); 2579 device_printf(sc->acpi_dev, 2580 "listener on %s cancelled the pending suspend\n", 2581 devtoname(clone->cdev)); 2582 ACPI_UNLOCK(acpi); 2583 return (0); 2584 } 2585 2586 /* 2587 * Mark this device as acking the suspend request. Then, walk through 2588 * all devices, seeing if they agree yet. We only count devices that 2589 * are writable since read-only devices couldn't ack the request. 2590 */ 2591 sleeping = TRUE; 2592 clone->notify_status = APM_EV_ACKED; 2593 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2594 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2595 clone->notify_status != APM_EV_ACKED) { 2596 sleeping = FALSE; 2597 break; 2598 } 2599 } 2600 2601 /* If all devices have voted "yes", we will suspend now. */ 2602 if (sleeping) 2603 callout_stop(&sc->susp_force_to); 2604 ACPI_UNLOCK(acpi); 2605 ret = 0; 2606 if (sleeping) { 2607 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2608 ret = ENODEV; 2609 } 2610 return (ret); 2611 #else 2612 /* This platform does not support acpi suspend/resume. */ 2613 return (EOPNOTSUPP); 2614 #endif 2615 } 2616 2617 static void 2618 acpi_sleep_enable(void *arg) 2619 { 2620 struct acpi_softc *sc = (struct acpi_softc *)arg; 2621 2622 /* Reschedule if the system is not fully up and running. */ 2623 if (!AcpiGbl_SystemAwakeAndRunning) { 2624 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2625 return; 2626 } 2627 2628 ACPI_LOCK(acpi); 2629 sc->acpi_sleep_disabled = FALSE; 2630 ACPI_UNLOCK(acpi); 2631 } 2632 2633 static ACPI_STATUS 2634 acpi_sleep_disable(struct acpi_softc *sc) 2635 { 2636 ACPI_STATUS status; 2637 2638 /* Fail if the system is not fully up and running. */ 2639 if (!AcpiGbl_SystemAwakeAndRunning) 2640 return (AE_ERROR); 2641 2642 ACPI_LOCK(acpi); 2643 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 2644 sc->acpi_sleep_disabled = TRUE; 2645 ACPI_UNLOCK(acpi); 2646 2647 return (status); 2648 } 2649 2650 enum acpi_sleep_state { 2651 ACPI_SS_NONE, 2652 ACPI_SS_GPE_SET, 2653 ACPI_SS_DEV_SUSPEND, 2654 ACPI_SS_SLP_PREP, 2655 ACPI_SS_SLEPT, 2656 }; 2657 2658 /* 2659 * Enter the desired system sleep state. 2660 * 2661 * Currently we support S1-S5 but S4 is only S4BIOS 2662 */ 2663 static ACPI_STATUS 2664 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2665 { 2666 register_t intr; 2667 ACPI_STATUS status; 2668 enum acpi_sleep_state slp_state; 2669 2670 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2671 2672 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2673 return_ACPI_STATUS (AE_BAD_PARAMETER); 2674 if (!acpi_sleep_states[state]) { 2675 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", 2676 state); 2677 return (AE_SUPPORT); 2678 } 2679 2680 /* Re-entry once we're suspending is not allowed. */ 2681 status = acpi_sleep_disable(sc); 2682 if (ACPI_FAILURE(status)) { 2683 device_printf(sc->acpi_dev, 2684 "suspend request ignored (not ready yet)\n"); 2685 return (status); 2686 } 2687 2688 if (state == ACPI_STATE_S5) { 2689 /* 2690 * Shut down cleanly and power off. This will call us back through the 2691 * shutdown handlers. 2692 */ 2693 shutdown_nice(RB_POWEROFF); 2694 return_ACPI_STATUS (AE_OK); 2695 } 2696 2697 EVENTHANDLER_INVOKE(power_suspend); 2698 2699 if (smp_started) { 2700 thread_lock(curthread); 2701 sched_bind(curthread, 0); 2702 thread_unlock(curthread); 2703 } 2704 2705 /* 2706 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2707 * drivers need this. 2708 */ 2709 mtx_lock(&Giant); 2710 2711 slp_state = ACPI_SS_NONE; 2712 2713 sc->acpi_sstate = state; 2714 2715 /* Enable any GPEs as appropriate and requested by the user. */ 2716 acpi_wake_prep_walk(state); 2717 slp_state = ACPI_SS_GPE_SET; 2718 2719 /* 2720 * Inform all devices that we are going to sleep. If at least one 2721 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2722 * 2723 * XXX Note that a better two-pass approach with a 'veto' pass 2724 * followed by a "real thing" pass would be better, but the current 2725 * bus interface does not provide for this. 2726 */ 2727 if (DEVICE_SUSPEND(root_bus) != 0) { 2728 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2729 goto backout; 2730 } 2731 slp_state = ACPI_SS_DEV_SUSPEND; 2732 2733 /* If testing device suspend only, back out of everything here. */ 2734 if (acpi_susp_bounce) 2735 goto backout; 2736 2737 status = AcpiEnterSleepStatePrep(state); 2738 if (ACPI_FAILURE(status)) { 2739 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2740 AcpiFormatException(status)); 2741 goto backout; 2742 } 2743 slp_state = ACPI_SS_SLP_PREP; 2744 2745 if (sc->acpi_sleep_delay > 0) 2746 DELAY(sc->acpi_sleep_delay * 1000000); 2747 2748 if (state != ACPI_STATE_S1) { 2749 if (acpi_sleep_machdep(sc, state)) 2750 goto backout; 2751 2752 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2753 if (state == ACPI_STATE_S4) 2754 AcpiEnable(); 2755 } else { 2756 intr = intr_disable(); 2757 status = AcpiEnterSleepState(state, acpi_sleep_flags); 2758 intr_restore(intr); 2759 if (ACPI_FAILURE(status)) { 2760 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2761 AcpiFormatException(status)); 2762 goto backout; 2763 } 2764 } 2765 slp_state = ACPI_SS_SLEPT; 2766 2767 /* 2768 * Back out state according to how far along we got in the suspend 2769 * process. This handles both the error and success cases. 2770 */ 2771 backout: 2772 if (slp_state >= ACPI_SS_GPE_SET) { 2773 acpi_wake_prep_walk(state); 2774 sc->acpi_sstate = ACPI_STATE_S0; 2775 } 2776 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2777 DEVICE_RESUME(root_bus); 2778 if (slp_state >= ACPI_SS_SLP_PREP) { 2779 AcpiLeaveSleepStatePrep(state, acpi_sleep_flags); 2780 AcpiLeaveSleepState(state); 2781 } 2782 if (slp_state >= ACPI_SS_SLEPT) { 2783 acpi_resync_clock(sc); 2784 acpi_enable_fixed_events(sc); 2785 } 2786 sc->acpi_next_sstate = 0; 2787 2788 mtx_unlock(&Giant); 2789 2790 if (smp_started) { 2791 thread_lock(curthread); 2792 sched_unbind(curthread); 2793 thread_unlock(curthread); 2794 } 2795 2796 EVENTHANDLER_INVOKE(power_resume); 2797 2798 /* Allow another sleep request after a while. */ 2799 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2800 2801 /* Run /etc/rc.resume after we are back. */ 2802 if (devctl_process_running()) 2803 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2804 2805 return_ACPI_STATUS (status); 2806 } 2807 2808 static void 2809 acpi_resync_clock(struct acpi_softc *sc) 2810 { 2811 #ifdef __amd64__ 2812 if (!acpi_reset_clock) 2813 return; 2814 2815 /* 2816 * Warm up timecounter again and reset system clock. 2817 */ 2818 (void)timecounter->tc_get_timecount(timecounter); 2819 (void)timecounter->tc_get_timecount(timecounter); 2820 inittodr(time_second + sc->acpi_sleep_delay); 2821 #endif 2822 } 2823 2824 /* Enable or disable the device's wake GPE. */ 2825 int 2826 acpi_wake_set_enable(device_t dev, int enable) 2827 { 2828 struct acpi_prw_data prw; 2829 ACPI_STATUS status; 2830 int flags; 2831 2832 /* Make sure the device supports waking the system and get the GPE. */ 2833 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2834 return (ENXIO); 2835 2836 flags = acpi_get_flags(dev); 2837 if (enable) { 2838 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2839 ACPI_GPE_ENABLE); 2840 if (ACPI_FAILURE(status)) { 2841 device_printf(dev, "enable wake failed\n"); 2842 return (ENXIO); 2843 } 2844 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2845 } else { 2846 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2847 ACPI_GPE_DISABLE); 2848 if (ACPI_FAILURE(status)) { 2849 device_printf(dev, "disable wake failed\n"); 2850 return (ENXIO); 2851 } 2852 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2853 } 2854 2855 return (0); 2856 } 2857 2858 static int 2859 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2860 { 2861 struct acpi_prw_data prw; 2862 device_t dev; 2863 2864 /* Check that this is a wake-capable device and get its GPE. */ 2865 if (acpi_parse_prw(handle, &prw) != 0) 2866 return (ENXIO); 2867 dev = acpi_get_device(handle); 2868 2869 /* 2870 * The destination sleep state must be less than (i.e., higher power) 2871 * or equal to the value specified by _PRW. If this GPE cannot be 2872 * enabled for the next sleep state, then disable it. If it can and 2873 * the user requested it be enabled, turn on any required power resources 2874 * and set _PSW. 2875 */ 2876 if (sstate > prw.lowest_wake) { 2877 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2878 if (bootverbose) 2879 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2880 acpi_name(handle), sstate); 2881 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2882 acpi_pwr_wake_enable(handle, 1); 2883 acpi_SetInteger(handle, "_PSW", 1); 2884 if (bootverbose) 2885 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2886 acpi_name(handle), sstate); 2887 } 2888 2889 return (0); 2890 } 2891 2892 static int 2893 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2894 { 2895 struct acpi_prw_data prw; 2896 device_t dev; 2897 2898 /* 2899 * Check that this is a wake-capable device and get its GPE. Return 2900 * now if the user didn't enable this device for wake. 2901 */ 2902 if (acpi_parse_prw(handle, &prw) != 0) 2903 return (ENXIO); 2904 dev = acpi_get_device(handle); 2905 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2906 return (0); 2907 2908 /* 2909 * If this GPE couldn't be enabled for the previous sleep state, it was 2910 * disabled before going to sleep so re-enable it. If it was enabled, 2911 * clear _PSW and turn off any power resources it used. 2912 */ 2913 if (sstate > prw.lowest_wake) { 2914 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2915 if (bootverbose) 2916 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2917 } else { 2918 acpi_SetInteger(handle, "_PSW", 0); 2919 acpi_pwr_wake_enable(handle, 0); 2920 if (bootverbose) 2921 device_printf(dev, "run_prep cleaned up for %s\n", 2922 acpi_name(handle)); 2923 } 2924 2925 return (0); 2926 } 2927 2928 static ACPI_STATUS 2929 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2930 { 2931 int sstate; 2932 2933 /* If suspending, run the sleep prep function, otherwise wake. */ 2934 sstate = *(int *)context; 2935 if (AcpiGbl_SystemAwakeAndRunning) 2936 acpi_wake_sleep_prep(handle, sstate); 2937 else 2938 acpi_wake_run_prep(handle, sstate); 2939 return (AE_OK); 2940 } 2941 2942 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2943 static int 2944 acpi_wake_prep_walk(int sstate) 2945 { 2946 ACPI_HANDLE sb_handle; 2947 2948 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2949 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2950 acpi_wake_prep, NULL, &sstate, NULL); 2951 return (0); 2952 } 2953 2954 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2955 static int 2956 acpi_wake_sysctl_walk(device_t dev) 2957 { 2958 int error, i, numdevs; 2959 device_t *devlist; 2960 device_t child; 2961 ACPI_STATUS status; 2962 2963 error = device_get_children(dev, &devlist, &numdevs); 2964 if (error != 0 || numdevs == 0) { 2965 if (numdevs == 0) 2966 free(devlist, M_TEMP); 2967 return (error); 2968 } 2969 for (i = 0; i < numdevs; i++) { 2970 child = devlist[i]; 2971 acpi_wake_sysctl_walk(child); 2972 if (!device_is_attached(child)) 2973 continue; 2974 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2975 if (ACPI_SUCCESS(status)) { 2976 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2977 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2978 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2979 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2980 } 2981 } 2982 free(devlist, M_TEMP); 2983 2984 return (0); 2985 } 2986 2987 /* Enable or disable wake from userland. */ 2988 static int 2989 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2990 { 2991 int enable, error; 2992 device_t dev; 2993 2994 dev = (device_t)arg1; 2995 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2996 2997 error = sysctl_handle_int(oidp, &enable, 0, req); 2998 if (error != 0 || req->newptr == NULL) 2999 return (error); 3000 if (enable != 0 && enable != 1) 3001 return (EINVAL); 3002 3003 return (acpi_wake_set_enable(dev, enable)); 3004 } 3005 3006 /* Parse a device's _PRW into a structure. */ 3007 int 3008 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 3009 { 3010 ACPI_STATUS status; 3011 ACPI_BUFFER prw_buffer; 3012 ACPI_OBJECT *res, *res2; 3013 int error, i, power_count; 3014 3015 if (h == NULL || prw == NULL) 3016 return (EINVAL); 3017 3018 /* 3019 * The _PRW object (7.2.9) is only required for devices that have the 3020 * ability to wake the system from a sleeping state. 3021 */ 3022 error = EINVAL; 3023 prw_buffer.Pointer = NULL; 3024 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 3025 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 3026 if (ACPI_FAILURE(status)) 3027 return (ENOENT); 3028 res = (ACPI_OBJECT *)prw_buffer.Pointer; 3029 if (res == NULL) 3030 return (ENOENT); 3031 if (!ACPI_PKG_VALID(res, 2)) 3032 goto out; 3033 3034 /* 3035 * Element 1 of the _PRW object: 3036 * The lowest power system sleeping state that can be entered while still 3037 * providing wake functionality. The sleeping state being entered must 3038 * be less than (i.e., higher power) or equal to this value. 3039 */ 3040 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 3041 goto out; 3042 3043 /* 3044 * Element 0 of the _PRW object: 3045 */ 3046 switch (res->Package.Elements[0].Type) { 3047 case ACPI_TYPE_INTEGER: 3048 /* 3049 * If the data type of this package element is numeric, then this 3050 * _PRW package element is the bit index in the GPEx_EN, in the 3051 * GPE blocks described in the FADT, of the enable bit that is 3052 * enabled for the wake event. 3053 */ 3054 prw->gpe_handle = NULL; 3055 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 3056 error = 0; 3057 break; 3058 case ACPI_TYPE_PACKAGE: 3059 /* 3060 * If the data type of this package element is a package, then this 3061 * _PRW package element is itself a package containing two 3062 * elements. The first is an object reference to the GPE Block 3063 * device that contains the GPE that will be triggered by the wake 3064 * event. The second element is numeric and it contains the bit 3065 * index in the GPEx_EN, in the GPE Block referenced by the 3066 * first element in the package, of the enable bit that is enabled for 3067 * the wake event. 3068 * 3069 * For example, if this field is a package then it is of the form: 3070 * Package() {\_SB.PCI0.ISA.GPE, 2} 3071 */ 3072 res2 = &res->Package.Elements[0]; 3073 if (!ACPI_PKG_VALID(res2, 2)) 3074 goto out; 3075 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 3076 if (prw->gpe_handle == NULL) 3077 goto out; 3078 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 3079 goto out; 3080 error = 0; 3081 break; 3082 default: 3083 goto out; 3084 } 3085 3086 /* Elements 2 to N of the _PRW object are power resources. */ 3087 power_count = res->Package.Count - 2; 3088 if (power_count > ACPI_PRW_MAX_POWERRES) { 3089 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 3090 power_count = 0; 3091 } 3092 prw->power_res_count = power_count; 3093 for (i = 0; i < power_count; i++) 3094 prw->power_res[i] = res->Package.Elements[i]; 3095 3096 out: 3097 if (prw_buffer.Pointer != NULL) 3098 AcpiOsFree(prw_buffer.Pointer); 3099 return (error); 3100 } 3101 3102 /* 3103 * ACPI Event Handlers 3104 */ 3105 3106 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 3107 3108 static void 3109 acpi_system_eventhandler_sleep(void *arg, int state) 3110 { 3111 struct acpi_softc *sc = (struct acpi_softc *)arg; 3112 int ret; 3113 3114 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3115 3116 /* Check if button action is disabled or unknown. */ 3117 if (state == ACPI_STATE_UNKNOWN) 3118 return; 3119 3120 /* Request that the system prepare to enter the given suspend state. */ 3121 ret = acpi_ReqSleepState(sc, state); 3122 if (ret != 0) 3123 device_printf(sc->acpi_dev, 3124 "request to enter state S%d failed (err %d)\n", state, ret); 3125 3126 return_VOID; 3127 } 3128 3129 static void 3130 acpi_system_eventhandler_wakeup(void *arg, int state) 3131 { 3132 3133 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3134 3135 /* Currently, nothing to do for wakeup. */ 3136 3137 return_VOID; 3138 } 3139 3140 /* 3141 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 3142 */ 3143 static void 3144 acpi_invoke_sleep_eventhandler(void *context) 3145 { 3146 3147 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context); 3148 } 3149 3150 static void 3151 acpi_invoke_wake_eventhandler(void *context) 3152 { 3153 3154 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context); 3155 } 3156 3157 UINT32 3158 acpi_event_power_button_sleep(void *context) 3159 { 3160 struct acpi_softc *sc = (struct acpi_softc *)context; 3161 3162 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3163 3164 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3165 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx))) 3166 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3167 return_VALUE (ACPI_INTERRUPT_HANDLED); 3168 } 3169 3170 UINT32 3171 acpi_event_power_button_wake(void *context) 3172 { 3173 struct acpi_softc *sc = (struct acpi_softc *)context; 3174 3175 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3176 3177 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3178 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx))) 3179 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3180 return_VALUE (ACPI_INTERRUPT_HANDLED); 3181 } 3182 3183 UINT32 3184 acpi_event_sleep_button_sleep(void *context) 3185 { 3186 struct acpi_softc *sc = (struct acpi_softc *)context; 3187 3188 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3189 3190 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3191 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx))) 3192 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3193 return_VALUE (ACPI_INTERRUPT_HANDLED); 3194 } 3195 3196 UINT32 3197 acpi_event_sleep_button_wake(void *context) 3198 { 3199 struct acpi_softc *sc = (struct acpi_softc *)context; 3200 3201 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3202 3203 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3204 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx))) 3205 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3206 return_VALUE (ACPI_INTERRUPT_HANDLED); 3207 } 3208 3209 /* 3210 * XXX This static buffer is suboptimal. There is no locking so only 3211 * use this for single-threaded callers. 3212 */ 3213 char * 3214 acpi_name(ACPI_HANDLE handle) 3215 { 3216 ACPI_BUFFER buf; 3217 static char data[256]; 3218 3219 buf.Length = sizeof(data); 3220 buf.Pointer = data; 3221 3222 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3223 return (data); 3224 return ("(unknown)"); 3225 } 3226 3227 /* 3228 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3229 * parts of the namespace. 3230 */ 3231 int 3232 acpi_avoid(ACPI_HANDLE handle) 3233 { 3234 char *cp, *env, *np; 3235 int len; 3236 3237 np = acpi_name(handle); 3238 if (*np == '\\') 3239 np++; 3240 if ((env = getenv("debug.acpi.avoid")) == NULL) 3241 return (0); 3242 3243 /* Scan the avoid list checking for a match */ 3244 cp = env; 3245 for (;;) { 3246 while (*cp != 0 && isspace(*cp)) 3247 cp++; 3248 if (*cp == 0) 3249 break; 3250 len = 0; 3251 while (cp[len] != 0 && !isspace(cp[len])) 3252 len++; 3253 if (!strncmp(cp, np, len)) { 3254 freeenv(env); 3255 return(1); 3256 } 3257 cp += len; 3258 } 3259 freeenv(env); 3260 3261 return (0); 3262 } 3263 3264 /* 3265 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3266 */ 3267 int 3268 acpi_disabled(char *subsys) 3269 { 3270 char *cp, *env; 3271 int len; 3272 3273 if ((env = getenv("debug.acpi.disabled")) == NULL) 3274 return (0); 3275 if (strcmp(env, "all") == 0) { 3276 freeenv(env); 3277 return (1); 3278 } 3279 3280 /* Scan the disable list, checking for a match. */ 3281 cp = env; 3282 for (;;) { 3283 while (*cp != '\0' && isspace(*cp)) 3284 cp++; 3285 if (*cp == '\0') 3286 break; 3287 len = 0; 3288 while (cp[len] != '\0' && !isspace(cp[len])) 3289 len++; 3290 if (strncmp(cp, subsys, len) == 0) { 3291 freeenv(env); 3292 return (1); 3293 } 3294 cp += len; 3295 } 3296 freeenv(env); 3297 3298 return (0); 3299 } 3300 3301 /* 3302 * Control interface. 3303 * 3304 * We multiplex ioctls for all participating ACPI devices here. Individual 3305 * drivers wanting to be accessible via /dev/acpi should use the 3306 * register/deregister interface to make their handlers visible. 3307 */ 3308 struct acpi_ioctl_hook 3309 { 3310 TAILQ_ENTRY(acpi_ioctl_hook) link; 3311 u_long cmd; 3312 acpi_ioctl_fn fn; 3313 void *arg; 3314 }; 3315 3316 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3317 static int acpi_ioctl_hooks_initted; 3318 3319 int 3320 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3321 { 3322 struct acpi_ioctl_hook *hp; 3323 3324 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3325 return (ENOMEM); 3326 hp->cmd = cmd; 3327 hp->fn = fn; 3328 hp->arg = arg; 3329 3330 ACPI_LOCK(acpi); 3331 if (acpi_ioctl_hooks_initted == 0) { 3332 TAILQ_INIT(&acpi_ioctl_hooks); 3333 acpi_ioctl_hooks_initted = 1; 3334 } 3335 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3336 ACPI_UNLOCK(acpi); 3337 3338 return (0); 3339 } 3340 3341 void 3342 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3343 { 3344 struct acpi_ioctl_hook *hp; 3345 3346 ACPI_LOCK(acpi); 3347 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3348 if (hp->cmd == cmd && hp->fn == fn) 3349 break; 3350 3351 if (hp != NULL) { 3352 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3353 free(hp, M_ACPIDEV); 3354 } 3355 ACPI_UNLOCK(acpi); 3356 } 3357 3358 static int 3359 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) 3360 { 3361 return (0); 3362 } 3363 3364 static int 3365 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) 3366 { 3367 return (0); 3368 } 3369 3370 static int 3371 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 3372 { 3373 struct acpi_softc *sc; 3374 struct acpi_ioctl_hook *hp; 3375 int error, state; 3376 3377 error = 0; 3378 hp = NULL; 3379 sc = dev->si_drv1; 3380 3381 /* 3382 * Scan the list of registered ioctls, looking for handlers. 3383 */ 3384 ACPI_LOCK(acpi); 3385 if (acpi_ioctl_hooks_initted) 3386 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3387 if (hp->cmd == cmd) 3388 break; 3389 } 3390 ACPI_UNLOCK(acpi); 3391 if (hp) 3392 return (hp->fn(cmd, addr, hp->arg)); 3393 3394 /* 3395 * Core ioctls are not permitted for non-writable user. 3396 * Currently, other ioctls just fetch information. 3397 * Not changing system behavior. 3398 */ 3399 if ((flag & FWRITE) == 0) 3400 return (EPERM); 3401 3402 /* Core system ioctls. */ 3403 switch (cmd) { 3404 case ACPIIO_REQSLPSTATE: 3405 state = *(int *)addr; 3406 if (state != ACPI_STATE_S5) 3407 return (acpi_ReqSleepState(sc, state)); 3408 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); 3409 error = EOPNOTSUPP; 3410 break; 3411 case ACPIIO_ACKSLPSTATE: 3412 error = *(int *)addr; 3413 error = acpi_AckSleepState(sc->acpi_clone, error); 3414 break; 3415 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3416 state = *(int *)addr; 3417 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) 3418 return (EINVAL); 3419 if (!acpi_sleep_states[state]) 3420 return (EOPNOTSUPP); 3421 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 3422 error = ENXIO; 3423 break; 3424 default: 3425 error = ENXIO; 3426 break; 3427 } 3428 3429 return (error); 3430 } 3431 3432 static int 3433 acpi_sname2sstate(const char *sname) 3434 { 3435 int sstate; 3436 3437 if (toupper(sname[0]) == 'S') { 3438 sstate = sname[1] - '0'; 3439 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && 3440 sname[2] == '\0') 3441 return (sstate); 3442 } else if (strcasecmp(sname, "NONE") == 0) 3443 return (ACPI_STATE_UNKNOWN); 3444 return (-1); 3445 } 3446 3447 static const char * 3448 acpi_sstate2sname(int sstate) 3449 { 3450 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; 3451 3452 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) 3453 return (snames[sstate]); 3454 else if (sstate == ACPI_STATE_UNKNOWN) 3455 return ("NONE"); 3456 return (NULL); 3457 } 3458 3459 static int 3460 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3461 { 3462 int error; 3463 struct sbuf sb; 3464 UINT8 state; 3465 3466 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3467 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 3468 if (acpi_sleep_states[state]) 3469 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); 3470 sbuf_trim(&sb); 3471 sbuf_finish(&sb); 3472 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3473 sbuf_delete(&sb); 3474 return (error); 3475 } 3476 3477 static int 3478 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3479 { 3480 char sleep_state[10]; 3481 int error, new_state, old_state; 3482 3483 old_state = *(int *)oidp->oid_arg1; 3484 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); 3485 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3486 if (error == 0 && req->newptr != NULL) { 3487 new_state = acpi_sname2sstate(sleep_state); 3488 if (new_state < ACPI_STATE_S1) 3489 return (EINVAL); 3490 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) 3491 return (EOPNOTSUPP); 3492 if (new_state != old_state) 3493 *(int *)oidp->oid_arg1 = new_state; 3494 } 3495 return (error); 3496 } 3497 3498 /* Inform devctl(4) when we receive a Notify. */ 3499 void 3500 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3501 { 3502 char notify_buf[16]; 3503 ACPI_BUFFER handle_buf; 3504 ACPI_STATUS status; 3505 3506 if (subsystem == NULL) 3507 return; 3508 3509 handle_buf.Pointer = NULL; 3510 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3511 status = AcpiNsHandleToPathname(h, &handle_buf); 3512 if (ACPI_FAILURE(status)) 3513 return; 3514 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3515 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3516 AcpiOsFree(handle_buf.Pointer); 3517 } 3518 3519 #ifdef ACPI_DEBUG 3520 /* 3521 * Support for parsing debug options from the kernel environment. 3522 * 3523 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3524 * by specifying the names of the bits in the debug.acpi.layer and 3525 * debug.acpi.level environment variables. Bits may be unset by 3526 * prefixing the bit name with !. 3527 */ 3528 struct debugtag 3529 { 3530 char *name; 3531 UINT32 value; 3532 }; 3533 3534 static struct debugtag dbg_layer[] = { 3535 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3536 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3537 {"ACPI_EVENTS", ACPI_EVENTS}, 3538 {"ACPI_TABLES", ACPI_TABLES}, 3539 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3540 {"ACPI_PARSER", ACPI_PARSER}, 3541 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3542 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3543 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3544 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3545 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3546 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3547 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3548 3549 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3550 {"ACPI_BATTERY", ACPI_BATTERY}, 3551 {"ACPI_BUS", ACPI_BUS}, 3552 {"ACPI_BUTTON", ACPI_BUTTON}, 3553 {"ACPI_EC", ACPI_EC}, 3554 {"ACPI_FAN", ACPI_FAN}, 3555 {"ACPI_POWERRES", ACPI_POWERRES}, 3556 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3557 {"ACPI_THERMAL", ACPI_THERMAL}, 3558 {"ACPI_TIMER", ACPI_TIMER}, 3559 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3560 {NULL, 0} 3561 }; 3562 3563 static struct debugtag dbg_level[] = { 3564 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3565 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3566 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3567 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3568 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3569 3570 /* Trace verbosity level 1 [Standard Trace Level] */ 3571 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3572 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3573 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3574 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3575 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3576 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3577 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3578 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3579 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3580 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3581 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3582 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3583 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3584 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3585 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3586 3587 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3588 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3589 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3590 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3591 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3592 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3593 3594 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3595 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3596 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3597 {"ACPI_LV_IO", ACPI_LV_IO}, 3598 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3599 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3600 3601 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3602 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3603 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3604 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3605 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3606 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3607 {NULL, 0} 3608 }; 3609 3610 static void 3611 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3612 { 3613 char *ep; 3614 int i, l; 3615 int set; 3616 3617 while (*cp) { 3618 if (isspace(*cp)) { 3619 cp++; 3620 continue; 3621 } 3622 ep = cp; 3623 while (*ep && !isspace(*ep)) 3624 ep++; 3625 if (*cp == '!') { 3626 set = 0; 3627 cp++; 3628 if (cp == ep) 3629 continue; 3630 } else { 3631 set = 1; 3632 } 3633 l = ep - cp; 3634 for (i = 0; tag[i].name != NULL; i++) { 3635 if (!strncmp(cp, tag[i].name, l)) { 3636 if (set) 3637 *flag |= tag[i].value; 3638 else 3639 *flag &= ~tag[i].value; 3640 } 3641 } 3642 cp = ep; 3643 } 3644 } 3645 3646 static void 3647 acpi_set_debugging(void *junk) 3648 { 3649 char *layer, *level; 3650 3651 if (cold) { 3652 AcpiDbgLayer = 0; 3653 AcpiDbgLevel = 0; 3654 } 3655 3656 layer = getenv("debug.acpi.layer"); 3657 level = getenv("debug.acpi.level"); 3658 if (layer == NULL && level == NULL) 3659 return; 3660 3661 printf("ACPI set debug"); 3662 if (layer != NULL) { 3663 if (strcmp("NONE", layer) != 0) 3664 printf(" layer '%s'", layer); 3665 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3666 freeenv(layer); 3667 } 3668 if (level != NULL) { 3669 if (strcmp("NONE", level) != 0) 3670 printf(" level '%s'", level); 3671 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3672 freeenv(level); 3673 } 3674 printf("\n"); 3675 } 3676 3677 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3678 NULL); 3679 3680 static int 3681 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3682 { 3683 int error, *dbg; 3684 struct debugtag *tag; 3685 struct sbuf sb; 3686 3687 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3688 return (ENOMEM); 3689 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3690 tag = &dbg_layer[0]; 3691 dbg = &AcpiDbgLayer; 3692 } else { 3693 tag = &dbg_level[0]; 3694 dbg = &AcpiDbgLevel; 3695 } 3696 3697 /* Get old values if this is a get request. */ 3698 ACPI_SERIAL_BEGIN(acpi); 3699 if (*dbg == 0) { 3700 sbuf_cpy(&sb, "NONE"); 3701 } else if (req->newptr == NULL) { 3702 for (; tag->name != NULL; tag++) { 3703 if ((*dbg & tag->value) == tag->value) 3704 sbuf_printf(&sb, "%s ", tag->name); 3705 } 3706 } 3707 sbuf_trim(&sb); 3708 sbuf_finish(&sb); 3709 3710 /* Copy out the old values to the user. */ 3711 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3712 sbuf_delete(&sb); 3713 3714 /* If the user is setting a string, parse it. */ 3715 if (error == 0 && req->newptr != NULL) { 3716 *dbg = 0; 3717 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3718 acpi_set_debugging(NULL); 3719 } 3720 ACPI_SERIAL_END(acpi); 3721 3722 return (error); 3723 } 3724 3725 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3726 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3727 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3728 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3729 #endif /* ACPI_DEBUG */ 3730 3731 static int 3732 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3733 { 3734 int error; 3735 int old; 3736 3737 old = acpi_debug_objects; 3738 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3739 if (error != 0 || req->newptr == NULL) 3740 return (error); 3741 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3742 return (0); 3743 3744 ACPI_SERIAL_BEGIN(acpi); 3745 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3746 ACPI_SERIAL_END(acpi); 3747 3748 return (0); 3749 } 3750 3751 static int 3752 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3753 { 3754 char *p; 3755 size_t len; 3756 int i, j; 3757 3758 p = str; 3759 while (isspace(*p) || *p == ',') 3760 p++; 3761 len = strlen(p); 3762 if (len == 0) 3763 return (0); 3764 p = strdup(p, M_TEMP); 3765 for (i = 0; i < len; i++) 3766 if (p[i] == ',') 3767 p[i] = '\0'; 3768 i = j = 0; 3769 while (i < len) 3770 if (isspace(p[i]) || p[i] == '\0') 3771 i++; 3772 else { 3773 i += strlen(p + i) + 1; 3774 j++; 3775 } 3776 if (j == 0) { 3777 free(p, M_TEMP); 3778 return (0); 3779 } 3780 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3781 iface->num = j; 3782 i = j = 0; 3783 while (i < len) 3784 if (isspace(p[i]) || p[i] == '\0') 3785 i++; 3786 else { 3787 iface->data[j] = p + i; 3788 i += strlen(p + i) + 1; 3789 j++; 3790 } 3791 3792 return (j); 3793 } 3794 3795 static void 3796 acpi_free_interfaces(struct acpi_interface *iface) 3797 { 3798 3799 free(iface->data[0], M_TEMP); 3800 free(iface->data, M_TEMP); 3801 } 3802 3803 static void 3804 acpi_reset_interfaces(device_t dev) 3805 { 3806 struct acpi_interface list; 3807 ACPI_STATUS status; 3808 int i; 3809 3810 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3811 for (i = 0; i < list.num; i++) { 3812 status = AcpiInstallInterface(list.data[i]); 3813 if (ACPI_FAILURE(status)) 3814 device_printf(dev, 3815 "failed to install _OSI(\"%s\"): %s\n", 3816 list.data[i], AcpiFormatException(status)); 3817 else if (bootverbose) 3818 device_printf(dev, "installed _OSI(\"%s\")\n", 3819 list.data[i]); 3820 } 3821 acpi_free_interfaces(&list); 3822 } 3823 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3824 for (i = 0; i < list.num; i++) { 3825 status = AcpiRemoveInterface(list.data[i]); 3826 if (ACPI_FAILURE(status)) 3827 device_printf(dev, 3828 "failed to remove _OSI(\"%s\"): %s\n", 3829 list.data[i], AcpiFormatException(status)); 3830 else if (bootverbose) 3831 device_printf(dev, "removed _OSI(\"%s\")\n", 3832 list.data[i]); 3833 } 3834 acpi_free_interfaces(&list); 3835 } 3836 } 3837 3838 static int 3839 acpi_pm_func(u_long cmd, void *arg, ...) 3840 { 3841 int state, acpi_state; 3842 int error; 3843 struct acpi_softc *sc; 3844 va_list ap; 3845 3846 error = 0; 3847 switch (cmd) { 3848 case POWER_CMD_SUSPEND: 3849 sc = (struct acpi_softc *)arg; 3850 if (sc == NULL) { 3851 error = EINVAL; 3852 goto out; 3853 } 3854 3855 va_start(ap, arg); 3856 state = va_arg(ap, int); 3857 va_end(ap); 3858 3859 switch (state) { 3860 case POWER_SLEEP_STATE_STANDBY: 3861 acpi_state = sc->acpi_standby_sx; 3862 break; 3863 case POWER_SLEEP_STATE_SUSPEND: 3864 acpi_state = sc->acpi_suspend_sx; 3865 break; 3866 case POWER_SLEEP_STATE_HIBERNATE: 3867 acpi_state = ACPI_STATE_S4; 3868 break; 3869 default: 3870 error = EINVAL; 3871 goto out; 3872 } 3873 3874 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3875 error = ENXIO; 3876 break; 3877 default: 3878 error = EINVAL; 3879 goto out; 3880 } 3881 3882 out: 3883 return (error); 3884 } 3885 3886 static void 3887 acpi_pm_register(void *arg) 3888 { 3889 if (!cold || resource_disabled("acpi", 0)) 3890 return; 3891 3892 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3893 } 3894 3895 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3896